7729 lines
270 KiB
C++
7729 lines
270 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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// vim:cindent:ts=2:et:sw=2:
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Steve Clark <buster@netscape.com>
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* Robert O'Callahan <roc+moz@cs.cmu.edu>
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* L. David Baron <dbaron@dbaron.org>
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* IBM Corporation
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* Mats Palmgren <mats.palmgren@bredband.net>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsCOMPtr.h"
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#include "nsBlockFrame.h"
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#include "nsBlockReflowContext.h"
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#include "nsBlockReflowState.h"
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#include "nsBlockBandData.h"
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#include "nsBulletFrame.h"
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#include "nsLineBox.h"
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#include "nsInlineFrame.h"
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#include "nsLineLayout.h"
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#include "nsPlaceholderFrame.h"
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#include "nsStyleConsts.h"
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#include "nsFrameManager.h"
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#include "nsPresContext.h"
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#include "nsIPresShell.h"
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#include "nsReflowPath.h"
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#include "nsStyleContext.h"
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#include "nsIView.h"
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#include "nsIFontMetrics.h"
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#include "nsHTMLParts.h"
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#include "nsHTMLAtoms.h"
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#include "nsIDOMEvent.h"
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#include "nsGenericHTMLElement.h"
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#include "prprf.h"
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#include "nsLayoutAtoms.h"
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#include "nsITextContent.h"
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#include "nsStyleChangeList.h"
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#include "nsIFrameSelection.h"
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#include "nsSpaceManager.h"
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#include "nsIntervalSet.h"
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|
#include "prenv.h"
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#include "plstr.h"
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#include "nsGUIEvent.h"
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#include "nsLayoutErrors.h"
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#include "nsAutoPtr.h"
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#include "nsIServiceManager.h"
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#include "nsIScrollableFrame.h"
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#ifdef ACCESSIBILITY
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#include "nsIAccessibilityService.h"
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#endif
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#include "nsLayoutUtils.h"
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#include "nsBoxLayoutState.h"
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#include "nsCSSAnonBoxes.h"
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#ifdef IBMBIDI
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#include "nsBidiPresUtils.h"
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#endif // IBMBIDI
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#include "nsIDOMHTMLBodyElement.h"
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#include "nsIDOMHTMLHtmlElement.h"
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static const int MIN_LINES_NEEDING_CURSOR = 20;
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#ifdef DEBUG
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#include "nsPrintfCString.h"
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#include "nsBlockDebugFlags.h"
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PRBool nsBlockFrame::gLamePaintMetrics;
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PRBool nsBlockFrame::gLameReflowMetrics;
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PRBool nsBlockFrame::gNoisy;
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PRBool nsBlockFrame::gNoisyDamageRepair;
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PRBool nsBlockFrame::gNoisyMaxElementWidth;
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PRBool nsBlockFrame::gNoisyReflow;
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PRBool nsBlockFrame::gReallyNoisyReflow;
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PRBool nsBlockFrame::gNoisySpaceManager;
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PRBool nsBlockFrame::gVerifyLines;
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PRBool nsBlockFrame::gDisableResizeOpt;
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PRInt32 nsBlockFrame::gNoiseIndent;
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struct BlockDebugFlags {
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const char* name;
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PRBool* on;
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};
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static const BlockDebugFlags gFlags[] = {
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{ "reflow", &nsBlockFrame::gNoisyReflow },
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{ "really-noisy-reflow", &nsBlockFrame::gReallyNoisyReflow },
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{ "max-element-width", &nsBlockFrame::gNoisyMaxElementWidth },
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{ "space-manager", &nsBlockFrame::gNoisySpaceManager },
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{ "verify-lines", &nsBlockFrame::gVerifyLines },
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{ "damage-repair", &nsBlockFrame::gNoisyDamageRepair },
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{ "lame-paint-metrics", &nsBlockFrame::gLamePaintMetrics },
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{ "lame-reflow-metrics", &nsBlockFrame::gLameReflowMetrics },
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{ "disable-resize-opt", &nsBlockFrame::gDisableResizeOpt },
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};
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#define NUM_DEBUG_FLAGS (sizeof(gFlags) / sizeof(gFlags[0]))
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static void
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ShowDebugFlags()
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{
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printf("Here are the available GECKO_BLOCK_DEBUG_FLAGS:\n");
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const BlockDebugFlags* bdf = gFlags;
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const BlockDebugFlags* end = gFlags + NUM_DEBUG_FLAGS;
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for (; bdf < end; bdf++) {
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printf(" %s\n", bdf->name);
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}
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printf("Note: GECKO_BLOCK_DEBUG_FLAGS is a comma separated list of flag\n");
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printf("names (no whitespace)\n");
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}
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void
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nsBlockFrame::InitDebugFlags()
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{
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static PRBool firstTime = PR_TRUE;
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if (firstTime) {
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firstTime = PR_FALSE;
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char* flags = PR_GetEnv("GECKO_BLOCK_DEBUG_FLAGS");
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if (flags) {
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PRBool error = PR_FALSE;
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for (;;) {
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char* cm = PL_strchr(flags, ',');
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if (cm) *cm = '\0';
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PRBool found = PR_FALSE;
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const BlockDebugFlags* bdf = gFlags;
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const BlockDebugFlags* end = gFlags + NUM_DEBUG_FLAGS;
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for (; bdf < end; bdf++) {
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if (PL_strcasecmp(bdf->name, flags) == 0) {
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*(bdf->on) = PR_TRUE;
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printf("nsBlockFrame: setting %s debug flag on\n", bdf->name);
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gNoisy = PR_TRUE;
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found = PR_TRUE;
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break;
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}
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}
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if (!found) {
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error = PR_TRUE;
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}
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if (!cm) break;
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*cm = ',';
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flags = cm + 1;
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}
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if (error) {
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ShowDebugFlags();
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}
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}
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}
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}
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#endif
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// add in a sanity check for absurdly deep frame trees. See bug 42138
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// can't just use IsFrameTreeTooDeep() because that method has side effects we don't want
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#define MAX_DEPTH_FOR_LIST_RENUMBERING 200 // 200 open displayable tags is pretty unrealistic
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//----------------------------------------------------------------------
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// Debugging support code
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#ifdef DEBUG
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const char* nsBlockFrame::kReflowCommandType[] = {
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"ContentChanged",
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"StyleChanged",
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"ReflowDirty",
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"Timeout",
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"UserDefined",
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};
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#endif
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#ifdef REALLY_NOISY_FIRST_LINE
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static void
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DumpStyleGeneaology(nsIFrame* aFrame, const char* gap)
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{
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fputs(gap, stdout);
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nsFrame::ListTag(stdout, aFrame);
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printf(": ");
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nsStyleContext* sc = aFrame->GetStyleContext();
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while (nsnull != sc) {
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nsStyleContext* psc;
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printf("%p ", sc);
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psc = sc->GetParent();
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sc = psc;
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}
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printf("\n");
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}
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#endif
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#ifdef REFLOW_STATUS_COVERAGE
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static void
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RecordReflowStatus(PRBool aChildIsBlock, nsReflowStatus aFrameReflowStatus)
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{
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static PRUint32 record[2];
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// 0: child-is-block
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// 1: child-is-inline
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PRIntn index = 0;
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if (!aChildIsBlock) index |= 1;
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// Compute new status
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PRUint32 newS = record[index];
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if (NS_INLINE_IS_BREAK(aFrameReflowStatus)) {
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if (NS_INLINE_IS_BREAK_BEFORE(aFrameReflowStatus)) {
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newS |= 1;
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}
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else if (NS_FRAME_IS_NOT_COMPLETE(aFrameReflowStatus)) {
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newS |= 2;
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}
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else {
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newS |= 4;
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}
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}
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else if (NS_FRAME_IS_NOT_COMPLETE(aFrameReflowStatus)) {
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newS |= 8;
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}
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else {
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newS |= 16;
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}
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// Log updates to the status that yield different values
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if (record[index] != newS) {
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record[index] = newS;
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printf("record(%d): %02x %02x\n", index, record[0], record[1]);
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}
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}
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#endif
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//----------------------------------------------------------------------
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const nsIID kBlockFrameCID = NS_BLOCK_FRAME_CID;
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nsresult
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NS_NewBlockFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame, PRUint32 aFlags)
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{
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NS_PRECONDITION(aNewFrame, "null OUT ptr");
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if (nsnull == aNewFrame) {
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return NS_ERROR_NULL_POINTER;
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}
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nsBlockFrame* it = new (aPresShell) nsBlockFrame;
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if (nsnull == it) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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it->SetFlags(aFlags);
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*aNewFrame = it;
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return NS_OK;
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}
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nsBlockFrame::nsBlockFrame()
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{
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#ifdef DEBUG
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InitDebugFlags();
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#endif
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}
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nsBlockFrame::~nsBlockFrame()
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{
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}
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NS_IMETHODIMP
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nsBlockFrame::Destroy(nsPresContext* aPresContext)
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{
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mAbsoluteContainer.DestroyFrames(this, aPresContext);
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// Outside bullets are not in our child-list so check for them here
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// and delete them when present.
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if (mBullet && HaveOutsideBullet()) {
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mBullet->Destroy(aPresContext);
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mBullet = nsnull;
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}
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mFloats.DestroyFrames(aPresContext);
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nsLineBox::DeleteLineList(aPresContext, mLines);
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// destroy overflow lines now
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nsLineList* overflowLines = RemoveOverflowLines();
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if (overflowLines) {
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nsLineBox::DeleteLineList(aPresContext, *overflowLines);
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}
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{
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nsAutoOOFFrameList oofs(this);
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oofs.mList.DestroyFrames(aPresContext);
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// oofs is now empty and will remove the frame list property
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}
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return nsBlockFrameSuper::Destroy(aPresContext);
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}
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NS_IMETHODIMP
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nsBlockFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
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{
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NS_PRECONDITION(aInstancePtr, "null out param");
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if (aIID.Equals(kBlockFrameCID)) {
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*aInstancePtr = NS_STATIC_CAST(void*, NS_STATIC_CAST(nsBlockFrame*, this));
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return NS_OK;
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}
|
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if (aIID.Equals(NS_GET_IID(nsILineIterator)) ||
|
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aIID.Equals(NS_GET_IID(nsILineIteratorNavigator)))
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{
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nsLineIterator* it = new nsLineIterator;
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if (!it) {
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*aInstancePtr = nsnull;
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return NS_ERROR_OUT_OF_MEMORY;
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}
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NS_ADDREF(it); // reference passed to caller
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const nsStyleVisibility* visibility = GetStyleVisibility();
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nsresult rv = it->Init(mLines,
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visibility->mDirection == NS_STYLE_DIRECTION_RTL);
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if (NS_FAILED(rv)) {
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NS_RELEASE(it);
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return rv;
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}
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*aInstancePtr = NS_STATIC_CAST(void*,
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NS_STATIC_CAST(nsILineIteratorNavigator*, it));
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return NS_OK;
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}
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return nsBlockFrameSuper::QueryInterface(aIID, aInstancePtr);
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}
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NS_IMETHODIMP
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nsBlockFrame::IsSplittable(nsSplittableType& aIsSplittable) const
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{
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aIsSplittable = NS_FRAME_SPLITTABLE_NON_RECTANGULAR;
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return NS_OK;
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}
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#ifdef DEBUG
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NS_METHOD
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nsBlockFrame::List(nsPresContext* aPresContext, FILE* out, PRInt32 aIndent) const
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{
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IndentBy(out, aIndent);
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ListTag(out);
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#ifdef DEBUG_waterson
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fprintf(out, " [parent=%p]", mParent);
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#endif
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if (HasView()) {
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fprintf(out, " [view=%p]", NS_STATIC_CAST(void*, GetView()));
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}
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if (nsnull != mNextSibling) {
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fprintf(out, " next=%p", NS_STATIC_CAST(void*, mNextSibling));
|
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}
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|
|
// Output the flow linkage
|
|
if (nsnull != mPrevInFlow) {
|
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fprintf(out, " prev-in-flow=%p", NS_STATIC_CAST(void*, mPrevInFlow));
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}
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if (nsnull != mNextInFlow) {
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fprintf(out, " next-in-flow=%p", NS_STATIC_CAST(void*, mNextInFlow));
|
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}
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|
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// Output the rect and state
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fprintf(out, " {%d,%d,%d,%d}", mRect.x, mRect.y, mRect.width, mRect.height);
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if (0 != mState) {
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fprintf(out, " [state=%08x]", mState);
|
|
}
|
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nsBlockFrame* f = NS_CONST_CAST(nsBlockFrame*, this);
|
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nsRect* overflowArea = f->GetOverflowAreaProperty(PR_FALSE);
|
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if (overflowArea) {
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fprintf(out, " [overflow=%d,%d,%d,%d]", overflowArea->x, overflowArea->y,
|
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overflowArea->width, overflowArea->height);
|
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}
|
|
PRInt32 numInlineLines = 0;
|
|
PRInt32 numBlockLines = 0;
|
|
if (! mLines.empty()) {
|
|
for (const_line_iterator line = begin_lines(), line_end = end_lines();
|
|
line != line_end;
|
|
++line)
|
|
{
|
|
if (line->IsBlock())
|
|
numBlockLines++;
|
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else
|
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numInlineLines++;
|
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}
|
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}
|
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fprintf(out, " sc=%p(i=%d,b=%d)",
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NS_STATIC_CAST(void*, mStyleContext), numInlineLines, numBlockLines);
|
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nsIAtom* pseudoTag = mStyleContext->GetPseudoType();
|
|
if (pseudoTag) {
|
|
nsAutoString atomString;
|
|
pseudoTag->ToString(atomString);
|
|
fprintf(out, " pst=%s",
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NS_LossyConvertUCS2toASCII(atomString).get());
|
|
}
|
|
fputs("<\n", out);
|
|
|
|
aIndent++;
|
|
|
|
// Output the lines
|
|
if (! mLines.empty()) {
|
|
for (const_line_iterator line = begin_lines(), line_end = end_lines();
|
|
line != line_end;
|
|
++line)
|
|
{
|
|
line->List(aPresContext, out, aIndent);
|
|
}
|
|
}
|
|
|
|
nsIAtom* listName = nsnull;
|
|
PRInt32 listIndex = 0;
|
|
for (;;) {
|
|
listName = GetAdditionalChildListName(listIndex++);
|
|
if (nsnull == listName) {
|
|
break;
|
|
}
|
|
nsIFrame* kid = GetFirstChild(listName);
|
|
if (kid) {
|
|
IndentBy(out, aIndent);
|
|
nsAutoString tmp;
|
|
if (nsnull != listName) {
|
|
listName->ToString(tmp);
|
|
fputs(NS_LossyConvertUCS2toASCII(tmp).get(), out);
|
|
}
|
|
fputs("<\n", out);
|
|
while (kid) {
|
|
nsIFrameDebug* frameDebug;
|
|
|
|
if (NS_SUCCEEDED(CallQueryInterface(kid, &frameDebug))) {
|
|
frameDebug->List(aPresContext, out, aIndent + 1);
|
|
}
|
|
kid = kid->GetNextSibling();
|
|
}
|
|
IndentBy(out, aIndent);
|
|
fputs(">\n", out);
|
|
}
|
|
}
|
|
|
|
aIndent--;
|
|
IndentBy(out, aIndent);
|
|
fputs(">\n", out);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP_(nsFrameState)
|
|
nsBlockFrame::GetDebugStateBits() const
|
|
{
|
|
// We don't want to include our cursor flag in the bits the
|
|
// regression tester looks at
|
|
return nsBlockFrameSuper::GetDebugStateBits() & ~NS_BLOCK_HAS_LINE_CURSOR;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::GetFrameName(nsAString& aResult) const
|
|
{
|
|
return MakeFrameName(NS_LITERAL_STRING("Block"), aResult);
|
|
}
|
|
#endif
|
|
|
|
nsIAtom*
|
|
nsBlockFrame::GetType() const
|
|
{
|
|
return nsLayoutAtoms::blockFrame;
|
|
}
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
// Child frame enumeration
|
|
|
|
nsIFrame*
|
|
nsBlockFrame::GetFirstChild(nsIAtom* aListName) const
|
|
{
|
|
if (mAbsoluteContainer.GetChildListName() == aListName) {
|
|
nsIFrame* result = nsnull;
|
|
mAbsoluteContainer.FirstChild(this, aListName, &result);
|
|
return result;
|
|
}
|
|
else if (nsnull == aListName) {
|
|
return (mLines.empty()) ? nsnull : mLines.front()->mFirstChild;
|
|
}
|
|
else if (aListName == nsLayoutAtoms::overflowList) {
|
|
nsLineList* overflowLines = GetOverflowLines();
|
|
return overflowLines ? overflowLines->front()->mFirstChild : nsnull;
|
|
}
|
|
else if (aListName == nsLayoutAtoms::overflowOutOfFlowList) {
|
|
return GetOverflowOutOfFlows().FirstChild();
|
|
}
|
|
else if (aListName == nsLayoutAtoms::floatList) {
|
|
return mFloats.FirstChild();
|
|
}
|
|
else if (aListName == nsLayoutAtoms::bulletList) {
|
|
if (HaveOutsideBullet()) {
|
|
return mBullet;
|
|
}
|
|
}
|
|
return nsnull;
|
|
}
|
|
|
|
nsIAtom*
|
|
nsBlockFrame::GetAdditionalChildListName(PRInt32 aIndex) const
|
|
{
|
|
switch (aIndex) {
|
|
case NS_BLOCK_FRAME_FLOAT_LIST_INDEX:
|
|
return nsLayoutAtoms::floatList;
|
|
case NS_BLOCK_FRAME_BULLET_LIST_INDEX:
|
|
return nsLayoutAtoms::bulletList;
|
|
case NS_BLOCK_FRAME_OVERFLOW_LIST_INDEX:
|
|
return nsLayoutAtoms::overflowList;
|
|
case NS_BLOCK_FRAME_OVERFLOW_OOF_LIST_INDEX:
|
|
return nsLayoutAtoms::overflowOutOfFlowList;
|
|
case NS_BLOCK_FRAME_ABSOLUTE_LIST_INDEX:
|
|
return mAbsoluteContainer.GetChildListName();
|
|
default:
|
|
return nsnull;
|
|
}
|
|
}
|
|
|
|
/* virtual */ PRBool
|
|
nsBlockFrame::IsContainingBlock() const
|
|
{
|
|
return PR_TRUE;
|
|
}
|
|
|
|
/* virtual */ PRBool
|
|
nsBlockFrame::IsFloatContainingBlock() const
|
|
{
|
|
return PR_TRUE;
|
|
}
|
|
|
|
static PRBool IsContinuationPlaceholder(nsIFrame* aFrame)
|
|
{
|
|
return aFrame->GetPrevInFlow() &&
|
|
nsLayoutAtoms::placeholderFrame == aFrame->GetType();
|
|
}
|
|
|
|
static void ReparentFrame(nsIFrame* aFrame, nsIFrame* aOldParent,
|
|
nsIFrame* aNewParent) {
|
|
NS_ASSERTION(aOldParent == aFrame->GetParent(),
|
|
"Parent not consistent with exepectations");
|
|
|
|
aFrame->SetParent(aNewParent);
|
|
|
|
// When pushing and pulling frames we need to check for whether any
|
|
// views need to be reparented
|
|
nsHTMLContainerFrame::ReparentFrameView(aFrame->GetPresContext(), aFrame,
|
|
aOldParent, aNewParent);
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Frame structure methods
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Reflow methods
|
|
|
|
static nsSize
|
|
CalculateContainingBlockSizeForAbsolutes(const nsHTMLReflowState& aReflowState,
|
|
nsSize aFrameSize)
|
|
{
|
|
// The issue here is that for a 'height' of 'auto' the reflow state
|
|
// code won't know how to calculate the containing block height
|
|
// because it's calculated bottom up. So we use our own computed
|
|
// size as the dimensions. We don't really want to do this for the
|
|
// initial containing block
|
|
nsIFrame* frame = aReflowState.frame;
|
|
if (nsLayoutUtils::IsInitialContainingBlock(frame)) {
|
|
return nsSize(-1, -1);
|
|
}
|
|
|
|
nsSize cbSize(aFrameSize);
|
|
// Containing block is relative to the padding edge
|
|
const nsMargin& border = aReflowState.mStyleBorder->GetBorder();
|
|
cbSize.width -= border.left + border.right;
|
|
cbSize.height -= border.top + border.bottom;
|
|
|
|
if (frame->GetParent()->GetContent() == frame->GetContent()) {
|
|
// We are a wrapped frame for the content. Use the container's
|
|
// dimensions, if they have been precomputed.
|
|
// XXX This is a hack! We really should be waiting until the outermost
|
|
// frame is fully reflowed and using the resulting dimensions, even
|
|
// if they're intrinsic.
|
|
// In fact we should be attaching absolute children to the outermost
|
|
// frame and not always sticking them in block frames.
|
|
|
|
// First, find the reflow state for the outermost frame for this
|
|
// content.
|
|
const nsHTMLReflowState* aLastRS = &aReflowState;
|
|
const nsHTMLReflowState* lastButOneRS = &aReflowState;
|
|
while (aLastRS->parentReflowState &&
|
|
aLastRS->parentReflowState->frame->GetContent() == frame->GetContent()) {
|
|
lastButOneRS = aLastRS;
|
|
aLastRS = aLastRS->parentReflowState;
|
|
}
|
|
if (aLastRS != &aReflowState) {
|
|
// The wrapper frame should be block-level. If it isn't, how the
|
|
// heck did it end up wrapping this block frame?
|
|
NS_ASSERTION(aLastRS->frame->GetStyleDisplay()->IsBlockLevel(),
|
|
"Wrapping frame should be block-level");
|
|
// Scrollbars need to be specifically excluded, if present, because they are outside the
|
|
// padding-edge. We need better APIs for getting the various boxes from a frame.
|
|
nsIScrollableFrame* scrollFrame;
|
|
CallQueryInterface(aLastRS->frame, &scrollFrame);
|
|
nsMargin scrollbars(0,0,0,0);
|
|
if (scrollFrame) {
|
|
nsBoxLayoutState dummyState(aLastRS->frame->GetPresContext());
|
|
scrollbars = scrollFrame->GetDesiredScrollbarSizes(&dummyState);
|
|
// XXX We should account for the horizontal scrollbar too --- but currently
|
|
// nsGfxScrollFrame assumes nothing depends on the presence (or absence) of
|
|
// a horizontal scrollbar, so accounting for it would create incremental
|
|
// reflow bugs.
|
|
//if (!lastButOneRS->mFlags.mAssumingHScrollbar) {
|
|
scrollbars.top = scrollbars.bottom = 0;
|
|
//}
|
|
if (!lastButOneRS->mFlags.mAssumingVScrollbar) {
|
|
scrollbars.left = scrollbars.right = 0;
|
|
}
|
|
}
|
|
// We found a reflow state for the outermost wrapping frame, so use
|
|
// its computed metrics if available
|
|
if (aLastRS->mComputedWidth != NS_UNCONSTRAINEDSIZE) {
|
|
cbSize.width = PR_MAX(0,
|
|
aLastRS->mComputedWidth + aLastRS->mComputedPadding.LeftRight() - scrollbars.LeftRight());
|
|
}
|
|
if (aLastRS->mComputedHeight != NS_UNCONSTRAINEDSIZE) {
|
|
cbSize.height = PR_MAX(0,
|
|
aLastRS->mComputedHeight + aLastRS->mComputedPadding.TopBottom() - scrollbars.TopBottom());
|
|
}
|
|
}
|
|
}
|
|
|
|
return cbSize;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::Reflow(nsPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aMetrics,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
DO_GLOBAL_REFLOW_COUNT("nsBlockFrame", aReflowState.reason);
|
|
DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aStatus);
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
nsCAutoString reflow;
|
|
reflow.Append(nsHTMLReflowState::ReasonToString(aReflowState.reason));
|
|
|
|
if (aReflowState.reason == eReflowReason_Incremental) {
|
|
nsHTMLReflowCommand *command = aReflowState.path->mReflowCommand;
|
|
|
|
if (command) {
|
|
// We're the target.
|
|
reflow += " (";
|
|
|
|
reflow += kReflowCommandType[command->Type()];
|
|
|
|
reflow += ")";
|
|
}
|
|
}
|
|
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": begin %s reflow availSize=%d,%d computedSize=%d,%d\n",
|
|
reflow.get(),
|
|
aReflowState.availableWidth, aReflowState.availableHeight,
|
|
aReflowState.mComputedWidth, aReflowState.mComputedHeight);
|
|
}
|
|
AutoNoisyIndenter indent(gNoisy);
|
|
PRTime start = LL_ZERO; // Initialize these variablies to silence the compiler.
|
|
PRInt32 ctc = 0; // We only use these if they are set (gLameReflowMetrics).
|
|
if (gLameReflowMetrics) {
|
|
start = PR_Now();
|
|
ctc = nsLineBox::GetCtorCount();
|
|
}
|
|
#endif
|
|
|
|
nsSize oldSize = GetSize();
|
|
|
|
// Should we create a space manager?
|
|
nsAutoSpaceManager autoSpaceManager(NS_CONST_CAST(nsHTMLReflowState &, aReflowState));
|
|
|
|
// XXXldb If we start storing the space manager in the frame rather
|
|
// than keeping it around only during reflow then we should create it
|
|
// only when there are actually floats to manage. Otherwise things
|
|
// like tables will gain significant bloat.
|
|
if (NS_BLOCK_SPACE_MGR & mState)
|
|
autoSpaceManager.CreateSpaceManagerFor(aPresContext, this);
|
|
|
|
// See if it's an incremental reflow command targeted only at
|
|
// absolute frames and we can skip ReflowDirtyLines().
|
|
PRBool needToReflowLines = aMetrics.mComputeMEW ||
|
|
// If we have lines with clearance, and the space manager already has
|
|
// floats, we need to check the positions of our lines with clearance
|
|
((GetStateBits() & NS_BLOCK_HAS_CLEAR_CHILDREN) &&
|
|
aReflowState.mSpaceManager->HasAnyFloats()) ||
|
|
// The areas of any floats in this block or in blocks under us
|
|
// need to be put into the space manager --- unless we are our own
|
|
// space manager, in which case it doesn't matter.
|
|
!(GetStateBits() & NS_BLOCK_SPACE_MGR);
|
|
|
|
if (mAbsoluteContainer.HasAbsoluteFrames() &&
|
|
eReflowReason_Incremental == aReflowState.reason &&
|
|
!needToReflowLines &&
|
|
mAbsoluteContainer.ReflowingAbsolutesOnly(this, aReflowState)) {
|
|
nsSize containingBlockSize
|
|
= CalculateContainingBlockSizeForAbsolutes(aReflowState, GetSize());
|
|
|
|
mAbsoluteContainer.IncrementalReflow(this, aPresContext, aReflowState,
|
|
containingBlockSize.width,
|
|
containingBlockSize.height);
|
|
|
|
// Just return our current size as our desired size.
|
|
aMetrics.width = mRect.width;
|
|
aMetrics.height = mRect.height;
|
|
aMetrics.ascent = mAscent;
|
|
aMetrics.descent = aMetrics.height - aMetrics.ascent;
|
|
|
|
// Whether or not we're complete hasn't changed
|
|
aStatus = (nsnull != mNextInFlow) ? NS_FRAME_NOT_COMPLETE : NS_FRAME_COMPLETE;
|
|
|
|
// Factor the absolutely positioned child bounds into the overflow area
|
|
ComputeCombinedArea(aReflowState, aMetrics);
|
|
nsRect childBounds;
|
|
mAbsoluteContainer.CalculateChildBounds(aPresContext, childBounds);
|
|
aMetrics.mOverflowArea.UnionRect(aMetrics.mOverflowArea, childBounds);
|
|
|
|
FinishAndStoreOverflow(&aMetrics);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
// OK, some lines may be reflowed. Blow away any saved line cursor because
|
|
// we may invalidate the nondecreasing combinedArea.y/yMost invariant,
|
|
// and we may even delete the line with the line cursor.
|
|
ClearLineCursor();
|
|
|
|
if (IsFrameTreeTooDeep(aReflowState, aMetrics, aStatus)) {
|
|
return NS_OK;
|
|
}
|
|
|
|
nsBlockReflowState state(aReflowState, aPresContext, this, aMetrics,
|
|
(NS_BLOCK_MARGIN_ROOT & mState),
|
|
(NS_BLOCK_MARGIN_ROOT & mState));
|
|
|
|
// The condition for doing Bidi resolutions includes a test for the
|
|
// dirtiness flags, because blocks sometimes send a resize reflow
|
|
// even though they have dirty children, An example where this can
|
|
// occur is when adding lines to a text control (bugs 95228 and 95400
|
|
// were caused by not doing Bidi resolution in these cases)
|
|
if (eReflowReason_Resize != aReflowState.reason ||
|
|
mState & NS_FRAME_IS_DIRTY || mState & NS_FRAME_HAS_DIRTY_CHILDREN) {
|
|
#ifdef IBMBIDI
|
|
if (! mLines.empty()) {
|
|
if (aPresContext->BidiEnabled()) {
|
|
nsBidiPresUtils* bidiUtils = aPresContext->GetBidiUtils();
|
|
if (bidiUtils) {
|
|
PRBool forceReflow;
|
|
nsresult rc = bidiUtils->Resolve(aPresContext, this,
|
|
mLines.front()->mFirstChild,
|
|
forceReflow,
|
|
aReflowState.mFlags.mVisualBidiFormControl);
|
|
if (NS_SUCCEEDED(rc) && forceReflow) {
|
|
// Mark everything dirty
|
|
// XXXldb This should be done right.
|
|
for (line_iterator line = begin_lines(), line_end = end_lines();
|
|
line != line_end;
|
|
++line)
|
|
{
|
|
line->MarkDirty();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif // IBMBIDI
|
|
RenumberLists(aPresContext);
|
|
}
|
|
|
|
nsresult rv = NS_OK;
|
|
|
|
// ALWAYS drain overflow. We never want to leave the previnflow's
|
|
// overflow lines hanging around; block reflow depends on the
|
|
// overflow line lists being cleared out between reflow passes.
|
|
DrainOverflowLines(state);
|
|
state.SetupOverflowPlaceholdersProperty();
|
|
|
|
switch (aReflowState.reason) {
|
|
case eReflowReason_Initial:
|
|
#ifdef NOISY_REFLOW_REASON
|
|
ListTag(stdout);
|
|
printf(": reflow=initial\n");
|
|
#endif
|
|
rv = PrepareInitialReflow(state);
|
|
mState &= ~NS_FRAME_FIRST_REFLOW;
|
|
break;
|
|
|
|
case eReflowReason_Dirty:
|
|
// Do nothing; the dirty lines will already have been marked.
|
|
break;
|
|
|
|
case eReflowReason_Incremental: {
|
|
#ifdef NOISY_REFLOW_REASON
|
|
ListTag(stdout);
|
|
printf(": reflow=incremental ");
|
|
#endif
|
|
nsReflowPath *path = aReflowState.path;
|
|
nsHTMLReflowCommand *command = path->mReflowCommand;
|
|
if (command) {
|
|
#ifdef NOISY_REFLOW_REASON
|
|
printf("type=%s ", kReflowCommandType[command->Type()]);
|
|
#endif
|
|
switch (command->Type()) {
|
|
case eReflowType_StyleChanged:
|
|
rv = PrepareStyleChangedReflow(state);
|
|
break;
|
|
case eReflowType_ReflowDirty:
|
|
// Do nothing; the dirty lines will already have been marked.
|
|
break;
|
|
case eReflowType_ContentChanged:
|
|
// Perform a full reflow.
|
|
rv = PrepareResizeReflow(state);
|
|
break;
|
|
default:
|
|
// We shouldn't get here. But, if we do, perform a full reflow.
|
|
NS_ERROR("unexpected reflow type");
|
|
rv = PrepareResizeReflow(state);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (path->FirstChild() != path->EndChildren()) {
|
|
// We're along the reflow path, but not necessarily the target
|
|
// of the reflow.
|
|
#ifdef NOISY_REFLOW_REASON
|
|
ListTag(stdout);
|
|
printf(" next={ ");
|
|
|
|
for (nsReflowPath::iterator iter = path->FirstChild();
|
|
iter != path->EndChildren();
|
|
++iter) {
|
|
nsFrame::ListTag(stdout, *iter);
|
|
printf(" ");
|
|
}
|
|
|
|
printf("}");
|
|
#endif
|
|
|
|
rv = PrepareChildIncrementalReflow(state);
|
|
}
|
|
|
|
#ifdef NOISY_REFLOW_REASON
|
|
printf("\n");
|
|
#endif
|
|
|
|
break;
|
|
}
|
|
|
|
case eReflowReason_StyleChange:
|
|
rv = PrepareStyleChangedReflow(state);
|
|
break;
|
|
|
|
case eReflowReason_Resize:
|
|
default:
|
|
#ifdef NOISY_REFLOW_REASON
|
|
ListTag(stdout);
|
|
printf(": reflow=resize (%d)\n", aReflowState.reason);
|
|
#endif
|
|
rv = PrepareResizeReflow(state);
|
|
break;
|
|
}
|
|
|
|
NS_ASSERTION(NS_SUCCEEDED(rv), "setting up reflow failed");
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
// Now reflow...
|
|
rv = ReflowDirtyLines(state, PR_TRUE);
|
|
NS_ASSERTION(NS_SUCCEEDED(rv), "reflow dirty lines failed");
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
// If the block is complete, put continuted floats in the closest ancestor
|
|
// block that uses the same space manager and leave the block complete; this
|
|
// allows subsequent lines on the page to be impacted by floats. If the
|
|
// block is incomplete or there is no ancestor using the same space manager,
|
|
// put continued floats at the beginning of the first overflow line.
|
|
if (state.mOverflowPlaceholders.NotEmpty()) {
|
|
NS_ASSERTION(aReflowState.availableHeight != NS_UNCONSTRAINEDSIZE,
|
|
"Somehow we failed to fit all content, even though we have unlimited space!");
|
|
if (NS_FRAME_IS_COMPLETE(state.mReflowStatus)) {
|
|
// find the nearest block ancestor that uses the same space manager
|
|
for (const nsHTMLReflowState* ancestorRS = aReflowState.parentReflowState;
|
|
ancestorRS;
|
|
ancestorRS = ancestorRS->parentReflowState) {
|
|
nsIFrame* ancestor = ancestorRS->frame;
|
|
nsIAtom* fType = ancestor->GetType();
|
|
if ((nsLayoutAtoms::blockFrame == fType || nsLayoutAtoms::areaFrame == fType) &&
|
|
aReflowState.mSpaceManager == ancestorRS->mSpaceManager) {
|
|
// Put the continued floats in ancestor since it uses the same space manager
|
|
nsFrameList* ancestorPlace =
|
|
((nsBlockFrame*)ancestor)->GetOverflowPlaceholders();
|
|
// The ancestor should have this list, since it's being reflowed. But maybe
|
|
// it isn't because of reflow roots or something.
|
|
if (ancestorPlace) {
|
|
for (nsIFrame* f = state.mOverflowPlaceholders.FirstChild();
|
|
f; f = f->GetNextSibling()) {
|
|
NS_ASSERTION(IsContinuationPlaceholder(f),
|
|
"Overflow placeholders must be continuation placeholders");
|
|
ReparentFrame(f, this, ancestorRS->frame);
|
|
nsIFrame* oof = nsPlaceholderFrame::GetRealFrameForPlaceholder(f);
|
|
mFloats.RemoveFrame(oof);
|
|
ReparentFrame(oof, this, ancestorRS->frame);
|
|
// Clear the next-sibling in case the frame wasn't in mFloats
|
|
oof->SetNextSibling(nsnull);
|
|
// Do not put the float into any child frame list, because
|
|
// placeholders in the overflow-placeholder block-state list
|
|
// don't keep their out of flows in a child frame list.
|
|
}
|
|
ancestorPlace->AppendFrames(nsnull, state.mOverflowPlaceholders.FirstChild());
|
|
state.mOverflowPlaceholders.SetFrames(nsnull);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (!state.mOverflowPlaceholders.IsEmpty()) {
|
|
state.mOverflowPlaceholders.SortByContentOrder();
|
|
PRInt32 numOverflowPlace = state.mOverflowPlaceholders.GetLength();
|
|
nsLineBox* newLine =
|
|
state.NewLineBox(state.mOverflowPlaceholders.FirstChild(),
|
|
numOverflowPlace, PR_FALSE);
|
|
if (newLine) {
|
|
nsLineList* overflowLines = GetOverflowLines();
|
|
if (overflowLines) {
|
|
// Need to put the overflow placeholders' floats into our
|
|
// overflow-out-of-flows list, since the overflow placeholders are
|
|
// going onto our overflow line list. Put them last, because that's
|
|
// where the placeholders are going.
|
|
nsFrameList floats;
|
|
nsIFrame* lastFloat = nsnull;
|
|
for (nsIFrame* f = state.mOverflowPlaceholders.FirstChild();
|
|
f; f = f->GetNextSibling()) {
|
|
NS_ASSERTION(IsContinuationPlaceholder(f),
|
|
"Overflow placeholders must be continuation placeholders");
|
|
nsIFrame* oof = nsPlaceholderFrame::GetRealFrameForPlaceholder(f);
|
|
// oof is not currently in any child list
|
|
floats.InsertFrames(nsnull, lastFloat, oof);
|
|
lastFloat = oof;
|
|
}
|
|
|
|
// Put the new placeholders *last* in the overflow lines
|
|
// because they might have previnflows in the overflow lines.
|
|
nsIFrame* lastChild = overflowLines->back()->LastChild();
|
|
lastChild->SetNextSibling(state.mOverflowPlaceholders.FirstChild());
|
|
// Create a new line as the last line and put the
|
|
// placeholders there
|
|
overflowLines->push_back(newLine);
|
|
|
|
nsAutoOOFFrameList oofs(this);
|
|
oofs.mList.AppendFrames(nsnull, floats.FirstChild());
|
|
}
|
|
else {
|
|
mLines.push_back(newLine);
|
|
nsLineList::iterator nextToLastLine = ----end_lines();
|
|
PushLines(state, nextToLastLine);
|
|
}
|
|
state.mOverflowPlaceholders.SetFrames(nsnull);
|
|
}
|
|
state.mReflowStatus |= NS_FRAME_NOT_COMPLETE | NS_FRAME_REFLOW_NEXTINFLOW;
|
|
}
|
|
}
|
|
|
|
if (NS_FRAME_IS_NOT_COMPLETE(state.mReflowStatus)) {
|
|
if (GetOverflowLines()) {
|
|
state.mReflowStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
|
|
}
|
|
|
|
if (NS_STYLE_OVERFLOW_CLIP == aReflowState.mStyleDisplay->mOverflowX) {
|
|
state.mReflowStatus = NS_FRAME_COMPLETE;
|
|
}
|
|
else {
|
|
#ifdef DEBUG_kipp
|
|
ListTag(stdout); printf(": block is not complete\n");
|
|
#endif
|
|
}
|
|
}
|
|
|
|
CheckFloats(state);
|
|
|
|
// Compute our final size
|
|
ComputeFinalSize(aReflowState, state, aMetrics);
|
|
nsRect currentOverflow = aMetrics.mOverflowArea;
|
|
FinishAndStoreOverflow(&aMetrics);
|
|
|
|
// see if verifyReflow is enabled, and if so store off the space manager pointer
|
|
#ifdef DEBUG
|
|
PRInt32 verifyReflowFlags = nsIPresShell::GetVerifyReflowFlags();
|
|
if (VERIFY_REFLOW_INCLUDE_SPACE_MANAGER & verifyReflowFlags)
|
|
{
|
|
// this is a leak of the space manager, but it's only in debug if verify reflow is enabled, so not a big deal
|
|
nsIPresShell *shell = aPresContext->GetPresShell();
|
|
if (shell) {
|
|
nsHTMLReflowState& reflowState = (nsHTMLReflowState&)aReflowState;
|
|
rv = SetProperty(nsLayoutAtoms::spaceManagerProperty,
|
|
reflowState.mSpaceManager,
|
|
nsnull /* should be nsSpaceManagerDestroyer*/);
|
|
|
|
autoSpaceManager.DebugOrphanSpaceManager();
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// Let the absolutely positioned container reflow any absolutely positioned
|
|
// child frames that need to be reflowed, e.g., elements with a percentage
|
|
// based width/height
|
|
// We want to do this under either of two conditions:
|
|
// 1. If we didn't do the incremental reflow above.
|
|
// 2. If our size changed.
|
|
// Even though it's the padding edge that's the containing block, we
|
|
// can use our rect (the border edge) since if the border style
|
|
// changed, the reflow would have been targeted at us so we'd satisfy
|
|
// condition 1.
|
|
if (mAbsoluteContainer.HasAbsoluteFrames()) {
|
|
nsRect childBounds;
|
|
nsSize containingBlockSize
|
|
= CalculateContainingBlockSizeForAbsolutes(aReflowState,
|
|
nsSize(aMetrics.width, aMetrics.height));
|
|
|
|
PRBool forceAbsoluteReflow = PR_TRUE;
|
|
PRBool cbWidthChanged = PR_TRUE;
|
|
PRBool cbHeightChanged = PR_TRUE;
|
|
if (eReflowReason_Incremental == aReflowState.reason) {
|
|
// Do the incremental reflows ... would be nice to merge with
|
|
// the reflows below but that would be more work, and more risky
|
|
mAbsoluteContainer.IncrementalReflow(this, aPresContext, aReflowState,
|
|
containingBlockSize.width,
|
|
containingBlockSize.height);
|
|
|
|
// If a reflow was targeted at this block then we'd better
|
|
// reflow the absolutes. For example the borders and padding
|
|
// might have changed in a way that leaves the frame size the
|
|
// same but the padding edge has moved.
|
|
if (!aReflowState.path->mReflowCommand) {
|
|
// We don't have to force reflow of all the absolutes.
|
|
forceAbsoluteReflow = PR_FALSE;
|
|
|
|
// We need to reflow those absolutes that depend on their
|
|
// placeholder position, or the containing block size in a
|
|
// direction in which the containing block size might have
|
|
// changed. So figure out whether our size changed.
|
|
cbWidthChanged = aMetrics.width != oldSize.width;
|
|
PRBool isRoot = !GetContent()->GetParent();
|
|
// If isRoot and we have auto height, then we are the initial
|
|
// containing block and the containing block height is the
|
|
// viewport height, which can't change during incremental
|
|
// reflow.
|
|
cbHeightChanged = isRoot && NS_UNCONSTRAINEDSIZE == aReflowState.mComputedHeight
|
|
? PR_FALSE : aMetrics.height != oldSize.height;
|
|
}
|
|
}
|
|
|
|
rv = mAbsoluteContainer.Reflow(this, aPresContext, aReflowState,
|
|
containingBlockSize.width,
|
|
containingBlockSize.height,
|
|
&childBounds,
|
|
forceAbsoluteReflow,
|
|
cbWidthChanged,
|
|
cbHeightChanged);
|
|
|
|
// Factor the absolutely positioned child bounds into the overflow area
|
|
aMetrics.mOverflowArea.UnionRect(currentOverflow, childBounds);
|
|
FinishAndStoreOverflow(&aMetrics);
|
|
}
|
|
|
|
// Determine if we need to repaint our border, background or outline
|
|
CheckInvalidateSizeChange(aPresContext, aMetrics, aReflowState);
|
|
|
|
// Clear the space manager pointer in the block reflow state so we
|
|
// don't waste time translating the coordinate system back on a dead
|
|
// space manager.
|
|
if (NS_BLOCK_SPACE_MGR & mState)
|
|
state.mSpaceManager = nsnull;
|
|
|
|
aStatus = state.mReflowStatus;
|
|
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": status=%x (%scomplete) metrics=%d,%d carriedMargin=%d",
|
|
aStatus, NS_FRAME_IS_COMPLETE(aStatus) ? "" : "not ",
|
|
aMetrics.width, aMetrics.height,
|
|
aMetrics.mCarriedOutBottomMargin.get());
|
|
if (mState & NS_FRAME_OUTSIDE_CHILDREN) {
|
|
printf(" combinedArea={%d,%d,%d,%d}",
|
|
aMetrics.mOverflowArea.x,
|
|
aMetrics.mOverflowArea.y,
|
|
aMetrics.mOverflowArea.width,
|
|
aMetrics.mOverflowArea.height);
|
|
}
|
|
if (aMetrics.mComputeMEW) {
|
|
printf(" maxElementWidth=%d", aMetrics.mMaxElementWidth);
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
if (gLameReflowMetrics) {
|
|
PRTime end = PR_Now();
|
|
|
|
PRInt32 ectc = nsLineBox::GetCtorCount();
|
|
PRInt32 numLines = mLines.size();
|
|
if (!numLines) numLines = 1;
|
|
PRTime delta, perLineDelta, lines;
|
|
LL_I2L(lines, numLines);
|
|
LL_SUB(delta, end, start);
|
|
LL_DIV(perLineDelta, delta, lines);
|
|
|
|
ListTag(stdout);
|
|
char buf[400];
|
|
PR_snprintf(buf, sizeof(buf),
|
|
": %lld elapsed (%lld per line) (%d lines; %d new lines)",
|
|
delta, perLineDelta, numLines, ectc - ctc);
|
|
printf("%s\n", buf);
|
|
}
|
|
if (gNoisyMaxElementWidth) {
|
|
if (aMetrics.mComputeMEW) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
printf("block %p returning with maxElementWidth=%d\n",
|
|
NS_STATIC_CAST(void*, this),
|
|
aMetrics.mMaxElementWidth);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aMetrics);
|
|
return rv;
|
|
}
|
|
|
|
static PRBool
|
|
HaveAutoWidth(const nsHTMLReflowState& aReflowState)
|
|
{
|
|
return NS_UNCONSTRAINEDSIZE == aReflowState.mComputedWidth ||
|
|
eStyleUnit_Auto == aReflowState.mStylePosition->mWidth.GetUnit();
|
|
}
|
|
|
|
|
|
// XXXldb why do we check vertical and horizontal at the same time? Don't
|
|
// we usually care about one or the other?
|
|
static PRBool
|
|
IsPercentageAwareChild(const nsIFrame* aFrame)
|
|
{
|
|
NS_ASSERTION(aFrame, "null frame is not allowed");
|
|
|
|
const nsStyleMargin* margin = aFrame->GetStyleMargin();
|
|
if (nsLineLayout::IsPercentageUnitSides(&margin->mMargin)) {
|
|
return PR_TRUE;
|
|
}
|
|
|
|
const nsStylePadding* padding = aFrame->GetStylePadding();
|
|
if (nsLineLayout::IsPercentageUnitSides(&padding->mPadding)) {
|
|
return PR_TRUE;
|
|
}
|
|
|
|
// Note that borders can't be aware of percentages
|
|
|
|
const nsStylePosition* pos = aFrame->GetStylePosition();
|
|
|
|
if (eStyleUnit_Percent == pos->mWidth.GetUnit()
|
|
|| eStyleUnit_Percent == pos->mMaxWidth.GetUnit()
|
|
|| eStyleUnit_Percent == pos->mMinWidth.GetUnit()
|
|
|| eStyleUnit_Percent == pos->mHeight.GetUnit()
|
|
|| eStyleUnit_Percent == pos->mMinHeight.GetUnit()
|
|
|| eStyleUnit_Percent == pos->mMaxHeight.GetUnit()
|
|
|| nsLineLayout::IsPercentageUnitSides(&pos->mOffset)) { // XXX need more here!!!
|
|
return PR_TRUE;
|
|
}
|
|
|
|
return PR_FALSE;
|
|
}
|
|
|
|
PRBool
|
|
nsBlockFrame::CheckForCollapsedBottomMarginFromClearanceLine()
|
|
{
|
|
line_iterator begin = begin_lines();
|
|
line_iterator line = end_lines();
|
|
|
|
while (PR_TRUE) {
|
|
if (begin == line) {
|
|
return PR_FALSE;
|
|
}
|
|
--line;
|
|
if (line->mBounds.height != 0 || !line->CachedIsEmpty()) {
|
|
return PR_FALSE;
|
|
}
|
|
if (line->HasClearance()) {
|
|
return PR_TRUE;
|
|
}
|
|
}
|
|
// not reached
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::ComputeFinalSize(const nsHTMLReflowState& aReflowState,
|
|
nsBlockReflowState& aState,
|
|
nsHTMLReflowMetrics& aMetrics)
|
|
{
|
|
const nsMargin& borderPadding = aState.BorderPadding();
|
|
#ifdef NOISY_FINAL_SIZE
|
|
ListTag(stdout);
|
|
printf(": mY=%d mIsBottomMarginRoot=%s mPrevBottomMargin=%d bp=%d,%d\n",
|
|
aState.mY, aState.GetFlag(BRS_ISBOTTOMMARGINROOT) ? "yes" : "no",
|
|
aState.mPrevBottomMargin,
|
|
borderPadding.top, borderPadding.bottom);
|
|
#endif
|
|
|
|
// XXXldb Handling min-width/max-width stuff after reflowing children
|
|
// seems wrong. But IIRC this function only does more than a little
|
|
// bit in rare cases (or something like that, I'm not really sure).
|
|
// What are those cases, and do we get the wrong behavior?
|
|
|
|
// Compute final width
|
|
nscoord maxElementWidth = 0;
|
|
#ifdef NOISY_KIDXMOST
|
|
printf("%p aState.mKidXMost=%d\n", this, aState.mKidXMost);
|
|
#endif
|
|
if (!HaveAutoWidth(aReflowState)) {
|
|
// Use style defined width
|
|
aMetrics.width = borderPadding.left + aReflowState.mComputedWidth +
|
|
borderPadding.right;
|
|
|
|
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTWIDTH)) {
|
|
if (GetStylePosition()->mWidth.GetUnit() == eStyleUnit_Percent) {
|
|
// for percentage widths, |HaveAutoWidth| is sometimes true and
|
|
// sometimes false (XXXldb check that this is really true), and
|
|
// we want the max-element-width to be the same either way
|
|
// (i.e., whether it's an uncontsrained reflow or a fixed-width
|
|
// reflow). Thus, do the same thing we do below.
|
|
maxElementWidth = aState.mMaxElementWidth +
|
|
borderPadding.left + borderPadding.right;
|
|
} else {
|
|
// When style defines the width use it for the max-element-width
|
|
// because we can't shrink any smaller.
|
|
maxElementWidth = aMetrics.width;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
nscoord computedWidth;
|
|
|
|
// XXX Misleading comment:
|
|
// There are two options here. We either shrink wrap around our
|
|
// contents or we fluff out to the maximum block width. Note:
|
|
// We always shrink wrap when given an unconstrained width.
|
|
if ((0 == (NS_BLOCK_SHRINK_WRAP & mState)) &&
|
|
!aState.GetFlag(BRS_UNCONSTRAINEDWIDTH) &&
|
|
!aState.GetFlag(BRS_SHRINKWRAPWIDTH)) {
|
|
// XXX Misleading comment:
|
|
// Set our width to the max width if we aren't already that
|
|
// wide. Note that the max-width has nothing to do with our
|
|
// contents (CSS2 section XXX)
|
|
// XXXldb In what cases do we reach this code?
|
|
computedWidth = borderPadding.left + aState.mContentArea.width +
|
|
borderPadding.right;
|
|
} else {
|
|
computedWidth = aState.mKidXMost;
|
|
if (NS_BLOCK_SPACE_MGR & mState) {
|
|
// Include the space manager's state to properly account for the
|
|
// extent of floated elements.
|
|
nscoord xmost;
|
|
if (aReflowState.mSpaceManager->XMost(xmost) &&
|
|
computedWidth < xmost)
|
|
computedWidth = xmost;
|
|
}
|
|
computedWidth += borderPadding.right;
|
|
}
|
|
|
|
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTWIDTH)) {
|
|
// Add in border and padding dimensions to already computed
|
|
// max-element-width values.
|
|
maxElementWidth = aState.mMaxElementWidth +
|
|
borderPadding.left + borderPadding.right;
|
|
}
|
|
|
|
// Apply min/max values
|
|
computedWidth -= borderPadding.left + borderPadding.right;
|
|
aReflowState.ApplyMinMaxConstraints(&computedWidth, nsnull);
|
|
computedWidth += borderPadding.left + borderPadding.right;
|
|
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTWIDTH)) {
|
|
nscoord computedMinWidth = aReflowState.mComputedMinWidth +
|
|
borderPadding.left + borderPadding.right;
|
|
if (maxElementWidth < computedMinWidth &&
|
|
GetStylePosition()->mMinWidth.GetUnit() != eStyleUnit_Percent) {
|
|
maxElementWidth = computedMinWidth;
|
|
}
|
|
}
|
|
aMetrics.width = computedWidth;
|
|
|
|
// If we're shrink wrapping, then now that we know our final width we
|
|
// need to do horizontal alignment of the inline lines and make sure
|
|
// blocks are correctly sized and positioned. Any lines that need
|
|
// final adjustment will have been marked as dirty
|
|
if (aState.GetFlag(BRS_SHRINKWRAPWIDTH) && aState.GetFlag(BRS_NEEDRESIZEREFLOW)) {
|
|
// If the closest block ancestor (and anything in between) is also
|
|
// shrink wrap width, then we don't need to do this, because it
|
|
// will reflow us after it calculates the final width
|
|
PRBool rewrap = PR_TRUE;
|
|
for (const nsHTMLReflowState *prs = aReflowState.parentReflowState;
|
|
prs && prs->mComputedWidth == NS_SHRINKWRAPWIDTH;
|
|
prs = prs->parentReflowState) {
|
|
if (prs->frame->GetType() == nsLayoutAtoms::blockFrame ||
|
|
prs->frame->GetType() == nsLayoutAtoms::areaFrame) {
|
|
rewrap = PR_FALSE;
|
|
break;
|
|
}
|
|
}
|
|
if (rewrap) {
|
|
// XXX Is this only used on things that are already NS_BLOCK_SPACE_MGR
|
|
// and NS_BLOCK_MARGIN_ROOT?
|
|
nsHTMLReflowState reflowState(aReflowState);
|
|
|
|
reflowState.mComputedWidth = aMetrics.width - borderPadding.left -
|
|
borderPadding.right;
|
|
reflowState.reason = eReflowReason_Resize;
|
|
reflowState.mSpaceManager->ClearRegions();
|
|
|
|
#ifdef DEBUG
|
|
nscoord oldDesiredWidth = aMetrics.width;
|
|
#endif
|
|
nsBlockReflowState state(reflowState, aState.mPresContext, this,
|
|
aMetrics,
|
|
aReflowState.mFlags.mHasClearance || (NS_BLOCK_MARGIN_ROOT & mState),
|
|
(NS_BLOCK_MARGIN_ROOT & mState));
|
|
// Don't try to pull up any new content from our next in flow. Shrinkwrapping
|
|
// shouldn't make us shorter anyway.
|
|
ReflowDirtyLines(state, PR_FALSE);
|
|
aState.mY = state.mY;
|
|
NS_ASSERTION(oldDesiredWidth == aMetrics.width, "bad desired width");
|
|
}
|
|
}
|
|
}
|
|
|
|
// Return bottom margin information
|
|
// rbs says he hit this assertion occasionally (see bug 86947), so
|
|
// just set the margin to zero and we'll figure out why later
|
|
//NS_ASSERTION(aMetrics.mCarriedOutBottomMargin.IsZero(),
|
|
// "someone else set the margin");
|
|
nscoord nonCarriedOutVerticalMargin = 0;
|
|
if (!aState.GetFlag(BRS_ISBOTTOMMARGINROOT)) {
|
|
// Apply rule from CSS 2.1 section 8.3.1. If we have some empty
|
|
// line with clearance and a non-zero top margin and all
|
|
// subsequent lines are empty, then we do not allow our childrens'
|
|
// carried out bottom margin to be carried out of us and collapse
|
|
// with our own bottom margin.
|
|
if (CheckForCollapsedBottomMarginFromClearanceLine()) {
|
|
// Convert the children's carried out margin to something that
|
|
// we will include in our height
|
|
nonCarriedOutVerticalMargin = aState.mPrevBottomMargin.get();
|
|
aState.mPrevBottomMargin.Zero();
|
|
}
|
|
aMetrics.mCarriedOutBottomMargin = aState.mPrevBottomMargin;
|
|
} else {
|
|
aMetrics.mCarriedOutBottomMargin.Zero();
|
|
}
|
|
|
|
// Compute final height
|
|
if (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedHeight) {
|
|
if (NS_FRAME_IS_COMPLETE(aState.mReflowStatus)) {
|
|
// Figure out how much of the computed height should be
|
|
// applied to this frame.
|
|
nscoord computedHeightLeftOver = aReflowState.mComputedHeight;
|
|
if (mPrevInFlow) {
|
|
// Reduce the height by the computed height of prev-in-flows.
|
|
for (nsIFrame* prev = mPrevInFlow; prev; prev = prev->GetPrevInFlow()) {
|
|
nscoord contentHeight = prev->GetRect().height;
|
|
if (prev == mPrevInFlow) {
|
|
// subtract off the style top borderpadding to get the
|
|
// content height
|
|
contentHeight -= aReflowState.mComputedBorderPadding.top;
|
|
}
|
|
computedHeightLeftOver -= contentHeight;
|
|
}
|
|
// We may have stretched the frame beyond its computed height. Oh well.
|
|
computedHeightLeftOver = PR_MAX(0, computedHeightLeftOver);
|
|
}
|
|
|
|
aMetrics.height = borderPadding.top + computedHeightLeftOver + borderPadding.bottom;
|
|
if (computedHeightLeftOver > 0 &&
|
|
aMetrics.height > aReflowState.availableHeight) {
|
|
// We don't fit and we consumed some of the computed height,
|
|
// so we should consume all the available height and then
|
|
// break. If our bottom border/padding straddles the break
|
|
// point, then this will increase our height and push the
|
|
// border/padding to the next page/column.
|
|
aMetrics.height = aReflowState.availableHeight;
|
|
aState.mReflowStatus |= NS_FRAME_NOT_COMPLETE;
|
|
}
|
|
}
|
|
else {
|
|
// Use the current height; continuations will take up the rest.
|
|
// Do extend the height to at least consume the available
|
|
// height, otherwise our left/right borders (for example) won't
|
|
// extend all the way to the break.
|
|
aMetrics.height = PR_MAX(aReflowState.availableHeight,
|
|
aState.mY + nonCarriedOutVerticalMargin);
|
|
}
|
|
|
|
// Don't carry out a bottom margin when our height is fixed.
|
|
aMetrics.mCarriedOutBottomMargin.Zero();
|
|
}
|
|
else {
|
|
nscoord autoHeight = aState.mY + nonCarriedOutVerticalMargin;
|
|
|
|
// Shrink wrap our height around our contents.
|
|
if (aState.GetFlag(BRS_ISBOTTOMMARGINROOT)) {
|
|
// When we are a bottom-margin root make sure that our last
|
|
// childs bottom margin is fully applied.
|
|
// Apply the margin only if there's space for it.
|
|
if (autoHeight < aState.mReflowState.availableHeight)
|
|
{
|
|
// Truncate bottom margin if it doesn't fit to our available height.
|
|
autoHeight = PR_MIN(autoHeight + aState.mPrevBottomMargin.get(), aState.mReflowState.availableHeight);
|
|
}
|
|
}
|
|
|
|
if (NS_BLOCK_SPACE_MGR & mState) {
|
|
// Include the space manager's state to properly account for the
|
|
// bottom margin of any floated elements; e.g., inside a table cell.
|
|
nscoord ymost;
|
|
if (aReflowState.mSpaceManager->YMost(ymost) &&
|
|
autoHeight < ymost)
|
|
autoHeight = ymost;
|
|
}
|
|
|
|
// Apply min/max values
|
|
autoHeight -= borderPadding.top;
|
|
nscoord oldAutoHeight = autoHeight;
|
|
aReflowState.ApplyMinMaxConstraints(nsnull, &autoHeight);
|
|
if (autoHeight != oldAutoHeight) {
|
|
// Our min-height or max-height made our height change. Don't carry out
|
|
// our kids' bottom margins.
|
|
aMetrics.mCarriedOutBottomMargin.Zero();
|
|
}
|
|
autoHeight += borderPadding.top + borderPadding.bottom;
|
|
aMetrics.height = autoHeight;
|
|
}
|
|
|
|
aMetrics.ascent = mAscent;
|
|
aMetrics.descent = aMetrics.height - aMetrics.ascent;
|
|
|
|
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTWIDTH)) {
|
|
// Store away the final value
|
|
aMetrics.mMaxElementWidth = maxElementWidth;
|
|
#ifdef DEBUG
|
|
if (gNoisyMaxElementWidth) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
printf ("nsBlockFrame::CFS: %p returning MEW %d\n",
|
|
NS_STATIC_CAST(void*, this), aMetrics.mMaxElementWidth);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#ifdef DEBUG_blocks
|
|
if (CRAZY_WIDTH(aMetrics.width) || CRAZY_HEIGHT(aMetrics.height)) {
|
|
ListTag(stdout);
|
|
printf(": WARNING: desired:%d,%d\n", aMetrics.width, aMetrics.height);
|
|
}
|
|
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTWIDTH) &&
|
|
(maxElementWidth > aMetrics.width))) {
|
|
ListTag(stdout);
|
|
printf(": WARNING: max-element-width:%d desired:%d,%d maxSize:%d,%d\n",
|
|
maxElementWidth, aMetrics.width, aMetrics.height,
|
|
aState.mReflowState.availableWidth,
|
|
aState.mReflowState.availableHeight);
|
|
}
|
|
#endif
|
|
#ifdef DEBUG
|
|
if (gNoisyMaxElementWidth) {
|
|
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTWIDTH)) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
if (NS_UNCONSTRAINEDSIZE == aState.mReflowState.availableWidth) {
|
|
printf("PASS1 ");
|
|
}
|
|
ListTag(stdout);
|
|
printf(": max-element-width:%d desired:%d,%d maxSize:%d,%d\n",
|
|
maxElementWidth, aMetrics.width, aMetrics.height,
|
|
aState.mReflowState.availableWidth,
|
|
aState.mReflowState.availableHeight);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// If we're requested to update our maximum width, then compute it
|
|
if (aState.GetFlag(BRS_COMPUTEMAXWIDTH)) {
|
|
if (!HaveAutoWidth(aReflowState) &&
|
|
aReflowState.mStylePosition->mWidth.GetUnit() != eStyleUnit_Percent) {
|
|
aMetrics.mMaximumWidth = aMetrics.width;
|
|
} else {
|
|
// We need to add in for the right border/padding
|
|
// The maximum width in the reflow state includes the left
|
|
// border/padding but not the right.
|
|
aMetrics.mMaximumWidth = aState.mMaximumWidth + borderPadding.right;
|
|
}
|
|
#ifdef NOISY_MAXIMUM_WIDTH
|
|
printf("nsBlockFrame::ComputeFinalSize block %p setting aMetrics.mMaximumWidth to %d\n", this, aMetrics.mMaximumWidth);
|
|
#endif
|
|
}
|
|
|
|
ComputeCombinedArea(aReflowState, aMetrics);
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::ComputeCombinedArea(const nsHTMLReflowState& aReflowState,
|
|
nsHTMLReflowMetrics& aMetrics)
|
|
{
|
|
// Compute the combined area of our children
|
|
// XXX_perf: This can be done incrementally. It is currently one of
|
|
// the things that makes incremental reflow O(N^2).
|
|
nsRect area(0, 0, aMetrics.width, aMetrics.height);
|
|
if (NS_STYLE_OVERFLOW_CLIP != aReflowState.mStyleDisplay->mOverflowX) {
|
|
for (line_iterator line = begin_lines(), line_end = end_lines();
|
|
line != line_end;
|
|
++line) {
|
|
area.UnionRect(area, line->GetCombinedArea());
|
|
}
|
|
|
|
// Factor the bullet in; normally the bullet will be factored into
|
|
// the line-box's combined area. However, if the line is a block
|
|
// line then it won't; if there are no lines, it won't. So just
|
|
// factor it in anyway (it can't hurt if it was already done).
|
|
// XXXldb Can we just fix GetCombinedArea instead?
|
|
if (mBullet) {
|
|
area.UnionRect(area, mBullet->GetRect());
|
|
}
|
|
}
|
|
#ifdef NOISY_COMBINED_AREA
|
|
ListTag(stdout);
|
|
printf(": ca=%d,%d,%d,%d\n", area.x, area.y, area.width, area.height);
|
|
#endif
|
|
|
|
aMetrics.mOverflowArea = area;
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::PrepareInitialReflow(nsBlockReflowState& aState)
|
|
{
|
|
PrepareResizeReflow(aState);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::PrepareChildIncrementalReflow(nsBlockReflowState& aState)
|
|
{
|
|
// XXXwaterson this is non-optimal. We'd rather do this in
|
|
// ReflowDirtyLines; however, I'm not quite ready to figure out how
|
|
// to deal with reflow path retargeting yet.
|
|
nsReflowPath *path = aState.mReflowState.path;
|
|
|
|
nsReflowPath::iterator iter = path->FirstChild();
|
|
nsReflowPath::iterator end = path->EndChildren();
|
|
|
|
for ( ; iter != end; ++iter) {
|
|
// Determine the line being impacted
|
|
line_iterator line = FindLineFor(*iter);
|
|
if (line == end_lines()) {
|
|
// This assertion actually fires on lots of pages
|
|
// (e.g., bugzilla, bugzilla query page), so limit it
|
|
// to a few people until we fix the problem causing it.
|
|
//
|
|
// I think waterson explained once why it was happening -- I think
|
|
// it has something to do with the interaction of the unconstrained
|
|
// reflow in multi-pass reflow with the reflow command's chain, but
|
|
// I don't remember the details.
|
|
#if defined(DEBUG_dbaron) || defined(DEBUG_waterson)
|
|
NS_NOTREACHED("We don't have a line for the target of the reflow. "
|
|
"Being inefficient");
|
|
#endif
|
|
// This can't happen, but just in case it does...
|
|
PrepareResizeReflow(aState);
|
|
continue;
|
|
}
|
|
|
|
if (line->IsInline()) {
|
|
if (aState.GetFlag(BRS_COMPUTEMAXWIDTH)) {
|
|
// We've been asked to compute the maximum width of the block
|
|
// frame, which ReflowLine() will handle by performing an
|
|
// unconstrained reflow on the line. If this incremental
|
|
// reflow is targeted at a continuing frame, we may have to
|
|
// retarget it, as the unconstrained reflow can destroy some
|
|
// of the continuations. This will allow the incremental
|
|
// reflow to arrive at the target frame during the first-pass
|
|
// unconstrained reflow.
|
|
nsIFrame *prevInFlow = (*iter)->GetPrevInFlow();
|
|
if (prevInFlow)
|
|
RetargetInlineIncrementalReflow(iter, line, prevInFlow);
|
|
}
|
|
}
|
|
|
|
// Mark this line dirty. We need to mark the previous line dirty
|
|
// if it is an inline line so that it can maybe pull up something
|
|
// from the just affected line.
|
|
MarkLineDirty(line);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::RetargetInlineIncrementalReflow(nsReflowPath::iterator &aTarget,
|
|
line_iterator &aLine,
|
|
nsIFrame *aPrevInFlow)
|
|
{
|
|
// To retarget the reflow, we'll walk back through the continuations
|
|
// until we reach the primary frame, or we reach a continuation that
|
|
// is preceded by a ``hard'' line break.
|
|
NS_ASSERTION(aLine->Contains(*aTarget),
|
|
"line doesn't contain the target of the incremental reflow");
|
|
|
|
// Now fix the iterator, keeping track of how many lines we walk
|
|
// back through.
|
|
PRInt32 lineCount = 0;
|
|
const line_iterator begin = begin_lines();
|
|
do {
|
|
// XXX this might happen if the block is split; e.g.,
|
|
// printing or print preview.
|
|
if (aLine == begin) {
|
|
#ifdef NS_DEBUG
|
|
if (GetParent() == aPrevInFlow->GetParent()) {
|
|
NS_ERROR("ran out of lines before we ran out of prev-in-flows");
|
|
}
|
|
else {
|
|
NS_ERROR("not yet implemented: retarget incremental reflow to"
|
|
" prev-in-flow with different parent");
|
|
}
|
|
#endif
|
|
break;
|
|
}
|
|
// Is the previous line a ``hard'' break? If so, stop: these
|
|
// continuations will be preserved during an unconstrained reflow.
|
|
// XXXwaterson should this be `!= NS_STYLE_CLEAR_NONE'?
|
|
--aLine;
|
|
if (aLine->GetBreakTypeAfter() == NS_STYLE_CLEAR_LINE)
|
|
break;
|
|
|
|
*aTarget = aPrevInFlow;
|
|
aPrevInFlow = aPrevInFlow->GetPrevInFlow();
|
|
|
|
#ifdef DEBUG
|
|
// Paranoia. Ensure that the prev-in-flow is really in the
|
|
// previous line.
|
|
line_iterator check = FindLineFor(*aTarget);
|
|
NS_ASSERTION(check == aLine, "prev-in-flow not in previous linebox");
|
|
#endif
|
|
|
|
++lineCount;
|
|
} while (aPrevInFlow);
|
|
|
|
if (lineCount > 0) {
|
|
// Fix any frames deeper in the reflow path.
|
|
#if 0
|
|
// XXXwaterson fix me! we've got to recurse through the iterator's
|
|
// kids. This really shouldn't matter unless we want to implement
|
|
// `display: inline-block' or do XBL form controls. Why, you ask?
|
|
// Because what will happen is that inline frames will get flowed
|
|
// with a resize reflow, which will be sufficient to mask any
|
|
// glitches that would otherwise occur. However, as soon as boxes
|
|
// or blocks end up in the flow here (and aren't explicit reflow
|
|
// roots), they may optimize away the resize reflow.
|
|
|
|
// Get the reflow path, which is stored as a stack (i.e., the next
|
|
// frame in the reflow is at the _end_ of the array).
|
|
nsVoidArray *path = aState.mReflowState.reflowCommand->GetPath();
|
|
|
|
for (PRInt32 i = path->Count() - 1; i >= 0; --i) {
|
|
nsIFrame *frame = NS_STATIC_CAST(nsIFrame *, path->ElementAt(i));
|
|
|
|
// Stop if we encounter a non-inline frame in the reflow path.
|
|
const nsStyleDisplay* display = frame->GetStyleDisplay();
|
|
|
|
if (NS_STYLE_DISPLAY_INLINE != display->mDisplay)
|
|
break;
|
|
|
|
// Walk back to the primary frame.
|
|
PRInt32 count = lineCount;
|
|
nsIFrame *prevInFlow;
|
|
do {
|
|
prevInFlow = frame->GetPrevInFlow();
|
|
} while (--count >= 0 && prevInFlow && (frame = prevInFlow));
|
|
|
|
path->ReplaceElementAt(frame, i);
|
|
}
|
|
#else
|
|
NS_WARNING("blowing an incremental reflow targeted at a nested inline");
|
|
#endif
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::MarkLineDirty(line_iterator aLine)
|
|
{
|
|
// Mark aLine dirty
|
|
aLine->MarkDirty();
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": mark line %p dirty\n", NS_STATIC_CAST(void*, aLine.get()));
|
|
}
|
|
#endif
|
|
|
|
// Mark previous line dirty if its an inline line so that it can
|
|
// maybe pullup something from the line just affected.
|
|
// XXX We don't need to do this if aPrevLine ends in a break-after...
|
|
if (aLine != mLines.front() &&
|
|
aLine->IsInline() &&
|
|
aLine.prev()->IsInline()) {
|
|
aLine.prev()->MarkDirty();
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": mark prev-line %p dirty\n",
|
|
NS_STATIC_CAST(void*, aLine.prev().get()));
|
|
}
|
|
#endif
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::UpdateBulletPosition(nsBlockReflowState& aState)
|
|
{
|
|
if (nsnull == mBullet) {
|
|
// Don't bother if there is no bullet
|
|
return NS_OK;
|
|
}
|
|
const nsStyleList* styleList = GetStyleList();
|
|
if (NS_STYLE_LIST_STYLE_POSITION_INSIDE == styleList->mListStylePosition) {
|
|
if (mBullet && HaveOutsideBullet()) {
|
|
// We now have an inside bullet, but used to have an outside
|
|
// bullet. Adjust the frame line list
|
|
if (! mLines.empty()) {
|
|
// if we have a line already, then move the bullet to the front of the
|
|
// first line
|
|
nsIFrame* child = nsnull;
|
|
nsLineBox* firstLine = mLines.front();
|
|
|
|
// bullet should not have any siblings if it was an outside bullet
|
|
NS_ASSERTION(!mBullet->GetNextSibling(), "outside bullet should not have siblings");
|
|
|
|
// move bullet to front and chain the previous frames, and update the line count
|
|
child = firstLine->mFirstChild;
|
|
firstLine->mFirstChild = mBullet;
|
|
mBullet->SetNextSibling(child);
|
|
PRInt32 count = firstLine->GetChildCount();
|
|
firstLine->SetChildCount(count+1);
|
|
// dirty it here in case the caller does not
|
|
firstLine->MarkDirty();
|
|
} else {
|
|
// no prior lines, just create a new line for the bullet
|
|
nsLineBox* line = aState.NewLineBox(mBullet, 1, PR_FALSE);
|
|
if (!line) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
mLines.push_back(line);
|
|
}
|
|
}
|
|
mState &= ~NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET;
|
|
}
|
|
else {
|
|
if (!HaveOutsideBullet()) {
|
|
// We now have an outside bullet, but used to have an inside
|
|
// bullet. Take the bullet frame out of the first lines frame
|
|
// list.
|
|
if ((! mLines.empty()) && (mBullet == mLines.front()->mFirstChild)) {
|
|
nsIFrame* next = mBullet->GetNextSibling();
|
|
mBullet->SetNextSibling(nsnull);
|
|
PRInt32 count = mLines.front()->GetChildCount() - 1;
|
|
NS_ASSERTION(count >= 0, "empty line w/o bullet");
|
|
mLines.front()->SetChildCount(count);
|
|
if (0 == count) {
|
|
nsLineBox* oldFront = mLines.front();
|
|
mLines.pop_front();
|
|
aState.FreeLineBox(oldFront);
|
|
if (! mLines.empty()) {
|
|
mLines.front()->MarkDirty();
|
|
}
|
|
}
|
|
else {
|
|
mLines.front()->mFirstChild = next;
|
|
mLines.front()->MarkDirty();
|
|
}
|
|
}
|
|
}
|
|
mState |= NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET;
|
|
}
|
|
#ifdef DEBUG
|
|
VerifyLines(PR_TRUE);
|
|
#endif
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::PrepareStyleChangedReflow(nsBlockReflowState& aState)
|
|
{
|
|
nsresult rv = UpdateBulletPosition(aState);
|
|
|
|
// Mark everything dirty
|
|
for (line_iterator line = begin_lines(), line_end = end_lines();
|
|
line != line_end;
|
|
++line)
|
|
{
|
|
line->MarkDirty();
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::PrepareResizeReflow(nsBlockReflowState& aState)
|
|
{
|
|
// See if we can try and avoid marking all the lines as dirty
|
|
PRBool tryAndSkipLines = PR_FALSE;
|
|
|
|
// we need to calculate if any part of then block itself
|
|
// is impacted by a float (bug 19579)
|
|
aState.GetAvailableSpace();
|
|
|
|
// See if this is a constrained resize reflow that is not impacted by floats
|
|
if ((! aState.IsImpactedByFloat()) &&
|
|
(aState.mReflowState.reason == eReflowReason_Resize) &&
|
|
(NS_UNCONSTRAINEDSIZE != aState.mReflowState.availableWidth)) {
|
|
|
|
// If the text is left-aligned, then we try and avoid reflowing the lines
|
|
const nsStyleText* styleText = GetStyleText();
|
|
|
|
if ((NS_STYLE_TEXT_ALIGN_LEFT == styleText->mTextAlign) ||
|
|
((NS_STYLE_TEXT_ALIGN_DEFAULT == styleText->mTextAlign) &&
|
|
(NS_STYLE_DIRECTION_LTR == aState.mReflowState.mStyleVisibility->mDirection))) {
|
|
tryAndSkipLines = PR_TRUE;
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
if (gDisableResizeOpt) {
|
|
tryAndSkipLines = PR_FALSE;
|
|
}
|
|
if (gNoisyReflow) {
|
|
if (!tryAndSkipLines) {
|
|
const nsStyleText* styleText = GetStyleText();
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": marking all lines dirty: reason=%d availWidth=%d textAlign=%d\n",
|
|
aState.mReflowState.reason,
|
|
aState.mReflowState.availableWidth,
|
|
styleText->mTextAlign);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (tryAndSkipLines) {
|
|
nscoord newAvailWidth = aState.mReflowState.mComputedBorderPadding.left;
|
|
|
|
if (NS_SHRINKWRAPWIDTH == aState.mReflowState.mComputedWidth) {
|
|
if (NS_UNCONSTRAINEDSIZE != aState.mReflowState.mComputedMaxWidth) {
|
|
newAvailWidth += aState.mReflowState.mComputedMaxWidth;
|
|
}
|
|
else {
|
|
newAvailWidth += aState.mReflowState.availableWidth;
|
|
}
|
|
} else {
|
|
if (NS_UNCONSTRAINEDSIZE != aState.mReflowState.mComputedWidth) {
|
|
newAvailWidth += aState.mReflowState.mComputedWidth;
|
|
}
|
|
else {
|
|
newAvailWidth += aState.mReflowState.availableWidth;
|
|
}
|
|
}
|
|
NS_ASSERTION(NS_UNCONSTRAINEDSIZE != newAvailWidth, "bad math, newAvailWidth is infinite");
|
|
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": trying to avoid marking all lines dirty\n");
|
|
}
|
|
#endif
|
|
|
|
for (line_iterator line = begin_lines(), line_end = end_lines();
|
|
line != line_end;
|
|
++line)
|
|
{
|
|
// We let child blocks make their own decisions the same
|
|
// way we are here.
|
|
if (line->IsBlock() ||
|
|
// XXXldb We need HasPercentageDescendant, not HasPercentageChild!!!
|
|
line->HasPercentageChild() ||
|
|
line->HasFloats() ||
|
|
(line != mLines.back() && !line->HasBreakAfter()) ||
|
|
line->ResizeReflowOptimizationDisabled() ||
|
|
line->IsImpactedByFloat() ||
|
|
(line->mBounds.XMost() > newAvailWidth)) {
|
|
line->MarkDirty();
|
|
}
|
|
|
|
#ifdef REALLY_NOISY_REFLOW
|
|
if (!line->IsBlock()) {
|
|
printf("PrepareResizeReflow thinks line %p is %simpacted by floats\n",
|
|
line.get(), line->IsImpactedByFloat() ? "" : "not ");
|
|
}
|
|
#endif
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow && !line->IsDirty()) {
|
|
IndentBy(stdout, gNoiseIndent + 1);
|
|
printf("skipped: line=%p next=%p %s %s%s%s breakTypeBefore/After=%d/%d xmost=%d\n",
|
|
NS_STATIC_CAST(void*, line.get()),
|
|
NS_STATIC_CAST(void*, (line.next() != end_lines() ? line.next().get() : nsnull)),
|
|
line->IsBlock() ? "block" : "inline",
|
|
line->HasBreakAfter() ? "has-break-after " : "",
|
|
line->HasFloats() ? "has-floats " : "",
|
|
line->IsImpactedByFloat() ? "impacted " : "",
|
|
line->GetBreakTypeBefore(), line->GetBreakTypeAfter(),
|
|
line->mBounds.XMost());
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
else {
|
|
// Mark everything dirty
|
|
for (line_iterator line = begin_lines(), line_end = end_lines();
|
|
line != line_end;
|
|
++line)
|
|
{
|
|
line->MarkDirty();
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
//----------------------------------------
|
|
|
|
nsBlockFrame::line_iterator
|
|
nsBlockFrame::FindLineFor(nsIFrame* aFrame)
|
|
{
|
|
// This assertion actually fires on lots of pages (e.g., bugzilla,
|
|
// bugzilla query page), so limit it to a few people until we fix the
|
|
// problem causing it. It's related to the similarly |#ifdef|ed
|
|
// assertion in |PrepareChildIncrementalReflow|.
|
|
#if defined(DEBUG_dbaron) || defined(DEBUG_waterson)
|
|
NS_PRECONDITION(aFrame, "why pass a null frame?");
|
|
#endif
|
|
|
|
line_iterator line = begin_lines(),
|
|
line_end = end_lines();
|
|
for ( ; line != line_end; ++line) {
|
|
// If the target frame is in-flow, and this line contains the it,
|
|
// then we've found our line.
|
|
if (line->Contains(aFrame))
|
|
return line;
|
|
|
|
// If the target frame is floated, and this line contains the
|
|
// float's placeholder, then we've found our line.
|
|
if (line->HasFloats()) {
|
|
for (nsFloatCache *fc = line->GetFirstFloat();
|
|
fc != nsnull;
|
|
fc = fc->Next()) {
|
|
if (aFrame == fc->mPlaceholder->GetOutOfFlowFrame())
|
|
return line;
|
|
}
|
|
}
|
|
}
|
|
|
|
return line_end;
|
|
}
|
|
|
|
/**
|
|
* Propagate reflow "damage" from from earlier lines to the current
|
|
* line. The reflow damage comes from the following sources:
|
|
* 1. The regions of float damage remembered during reflow.
|
|
* 2. The combination of nonzero |aDeltaY| and any impact by a float,
|
|
* either the previous reflow or now.
|
|
*
|
|
* When entering this function, |aLine| is still at its old position and
|
|
* |aDeltaY| indicates how much it will later be slid (assuming it
|
|
* doesn't get marked dirty and reflowed entirely).
|
|
*/
|
|
void
|
|
nsBlockFrame::PropagateFloatDamage(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
nscoord aDeltaY)
|
|
{
|
|
NS_PRECONDITION(!aLine->IsDirty(), "should never be called on dirty lines");
|
|
|
|
// Check the damage region recorded in the float damage.
|
|
nsSpaceManager *spaceManager = aState.mReflowState.mSpaceManager;
|
|
if (spaceManager->HasFloatDamage()) {
|
|
nscoord lineYA = aLine->mBounds.y + aDeltaY;
|
|
nscoord lineYB = lineYA + aLine->mBounds.height;
|
|
if (spaceManager->IntersectsDamage(lineYA, lineYB)) {
|
|
aLine->MarkDirty();
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (aDeltaY) {
|
|
// Cases we need to find:
|
|
//
|
|
// 1. the line was impacted by a float and now isn't
|
|
// 2. the line wasn't impacted by a float and now is
|
|
// 3. the line is impacted by a float both before and after and
|
|
// the float has changed position relative to the line (or it's
|
|
// a different float). (XXXPerf we don't currently
|
|
// check whether the float changed size. We currently just
|
|
// mark blocks dirty and ignore any possibility of damage to
|
|
// inlines by it being a different float with a different
|
|
// size.)
|
|
//
|
|
// XXXPerf: An optimization: if the line was and is completely
|
|
// impacted by a float and the float hasn't changed size,
|
|
// then we don't need to mark the line dirty.
|
|
aState.GetAvailableSpace(aLine->mBounds.y + aDeltaY, PR_FALSE);
|
|
PRBool wasImpactedByFloat = aLine->IsImpactedByFloat();
|
|
PRBool isImpactedByFloat = aState.IsImpactedByFloat();
|
|
#ifdef REALLY_NOISY_REFLOW
|
|
printf("nsBlockFrame::PropagateFloatDamage %p was = %d, is=%d\n",
|
|
this, wasImpactedByFloat, isImpactedByFloat);
|
|
#endif
|
|
// Mark the line dirty if:
|
|
// 1. It used to be impacted by a float and now isn't, or vice
|
|
// versa.
|
|
// 2. It is impacted by a float and it is a block, which means
|
|
// that more or less of the line could be impacted than was in
|
|
// the past. (XXXPerf This could be optimized further, since
|
|
// we're marking the whole line dirty.)
|
|
if ((wasImpactedByFloat != isImpactedByFloat) ||
|
|
(isImpactedByFloat && aLine->IsBlock())) {
|
|
aLine->MarkDirty();
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
DirtyLinesWithDirtyContinuations(const nsLineList::iterator& aLineStart,
|
|
const nsLineList::iterator& aLineEnd)
|
|
{
|
|
// The line we're looking at right now
|
|
nsLineList::iterator line(aLineEnd);
|
|
|
|
// Whether the line following the current one is dirty
|
|
PRBool nextLineDirty = PR_FALSE;
|
|
|
|
while (line != aLineStart) {
|
|
--line;
|
|
|
|
if (nextLineDirty && line->IsInline() && line->IsLineWrapped()) {
|
|
line->MarkDirty();
|
|
// Note that nextLineDirty is already true and |line| will be the "next
|
|
// line" next time through this loop, and we just marked it dirty, so
|
|
// just leave nextLineDirty as true.
|
|
} else {
|
|
nextLineDirty = line->IsDirty();
|
|
}
|
|
}
|
|
}
|
|
|
|
static void PlaceFrameView(nsIFrame* aFrame);
|
|
|
|
static PRBool LineHasClear(nsLineBox* aLine) {
|
|
return aLine->GetBreakTypeBefore() || aLine->HasFloatBreakAfter()
|
|
|| (aLine->IsBlock() && (aLine->mFirstChild->GetStateBits() & NS_BLOCK_HAS_CLEAR_CHILDREN));
|
|
}
|
|
|
|
|
|
/**
|
|
* Reparent a whole list of floats from aOldParent to this block. The
|
|
* floats might be taken from aOldParent's overflow list. They will be
|
|
* removed from the list. They end up appended to our mFloats list.
|
|
*/
|
|
void
|
|
nsBlockFrame::ReparentFloats(nsIFrame* aFirstFrame,
|
|
nsBlockFrame* aOldParent, PRBool aFromOverflow,
|
|
PRBool aReparentSiblings) {
|
|
nsFrameList list;
|
|
nsIFrame* tail = nsnull;
|
|
aOldParent->CollectFloats(aFirstFrame, list, &tail, aFromOverflow, aReparentSiblings);
|
|
if (list.NotEmpty()) {
|
|
for (nsIFrame* f = list.FirstChild(); f; f = f->GetNextSibling()) {
|
|
ReparentFrame(f, aOldParent, this);
|
|
}
|
|
mFloats.AppendFrames(nsnull, list.FirstChild());
|
|
}
|
|
}
|
|
|
|
static void DumpLine(const nsBlockReflowState& aState, nsLineBox* aLine,
|
|
nscoord aDeltaY, PRInt32 aDeltaIndent) {
|
|
#ifdef DEBUG
|
|
if (nsBlockFrame::gNoisyReflow) {
|
|
nsRect lca(aLine->GetCombinedArea());
|
|
nsBlockFrame::IndentBy(stdout, nsBlockFrame::gNoiseIndent + aDeltaIndent);
|
|
printf("line=%p mY=%d dirty=%s oldBounds={%d,%d,%d,%d} oldCombinedArea={%d,%d,%d,%d} deltaY=%d mPrevBottomMargin=%d childCount=%d\n",
|
|
NS_STATIC_CAST(void*, aLine), aState.mY,
|
|
aLine->IsDirty() ? "yes" : "no",
|
|
aLine->mBounds.x, aLine->mBounds.y,
|
|
aLine->mBounds.width, aLine->mBounds.height,
|
|
lca.x, lca.y, lca.width, lca.height,
|
|
aDeltaY, aState.mPrevBottomMargin.get(), aLine->GetChildCount());
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* Reflow the dirty lines
|
|
*/
|
|
nsresult
|
|
nsBlockFrame::ReflowDirtyLines(nsBlockReflowState& aState, PRBool aTryPull)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
PRBool keepGoing = PR_TRUE;
|
|
PRBool repositionViews = PR_FALSE; // should we really need this?
|
|
PRBool foundAnyClears = PR_FALSE;
|
|
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
if (aState.mReflowState.reason == eReflowReason_Incremental) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": incrementally reflowing dirty lines");
|
|
|
|
nsHTMLReflowCommand *command = aState.mReflowState.path->mReflowCommand;
|
|
if (command) {
|
|
printf(": type=%s(%d)", kReflowCommandType[command->Type()],
|
|
command->Type());
|
|
}
|
|
}
|
|
else {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": reflowing dirty lines");
|
|
}
|
|
printf(" computedWidth=%d\n", aState.mReflowState.mComputedWidth);
|
|
}
|
|
AutoNoisyIndenter indent(gNoisyReflow);
|
|
#endif
|
|
|
|
// Check whether we need to do invalidation for the child block
|
|
PRBool doInvalidate =
|
|
aState.mReflowState.reason == eReflowReason_Incremental ||
|
|
aState.mReflowState.reason == eReflowReason_Dirty ||
|
|
aState.mReflowState.reason == eReflowReason_Resize;
|
|
|
|
// the amount by which we will slide the current line if it is not
|
|
// dirty
|
|
nscoord deltaY = 0;
|
|
|
|
// whether we did NOT reflow the previous line and thus we need to
|
|
// recompute the carried out margin before the line if we want to
|
|
// reflow it or if its previous margin is dirty
|
|
PRBool needToRecoverState = PR_FALSE;
|
|
PRBool reflowedFloat = PR_FALSE;
|
|
PRBool lastLineMovedUp = PR_FALSE;
|
|
// We save up information about BR-clearance here
|
|
PRUint8 inlineFloatBreakType = NS_STYLE_CLEAR_NONE;
|
|
|
|
line_iterator line = begin_lines(), line_end = end_lines();
|
|
|
|
// If we're supposed to update our maximum width, then we'll also need to
|
|
// reflow any line if it's line wrapped and has a dirty continuing line.
|
|
if (aState.GetFlag(BRS_COMPUTEMAXWIDTH)) {
|
|
::DirtyLinesWithDirtyContinuations(line, line_end);
|
|
}
|
|
|
|
// Reflow the lines that are already ours
|
|
for ( ; line != line_end; ++line, aState.AdvanceToNextLine()) {
|
|
DumpLine(aState, line, deltaY, 0);
|
|
#ifdef DEBUG
|
|
AutoNoisyIndenter indent2(gNoisyReflow);
|
|
#endif
|
|
|
|
// This really sucks, but we have to look inside any blocks that have clear
|
|
// elements inside them.
|
|
// XXX what can we do smarter here?
|
|
if (line->IsBlock() &&
|
|
(line->mFirstChild->GetStateBits() & NS_BLOCK_HAS_CLEAR_CHILDREN)) {
|
|
line->MarkDirty();
|
|
}
|
|
|
|
// We have to reflow the line if it's a block whose clearance
|
|
// might have changed, so detect that.
|
|
if (!line->IsDirty() && line->GetBreakTypeBefore() != NS_STYLE_CLEAR_NONE) {
|
|
nscoord curY = aState.mY;
|
|
// See where we would be after applying any clearance due to
|
|
// BRs.
|
|
if (inlineFloatBreakType != NS_STYLE_CLEAR_NONE) {
|
|
curY = aState.ClearFloats(curY, inlineFloatBreakType);
|
|
}
|
|
|
|
nscoord newY = aState.ClearFloats(curY, line->GetBreakTypeBefore());
|
|
|
|
if (line->HasClearance()) {
|
|
// Reflow the line if it might not have clearance anymore.
|
|
if (newY == curY
|
|
// aState.mY is the clearance point which should be the
|
|
// top border-edge of the block frame. If sliding the
|
|
// block by deltaY isn't going to put it in the predicted
|
|
// position, then we'd better reflow the line.
|
|
|| newY != line->mBounds.y + deltaY) {
|
|
line->MarkDirty();
|
|
}
|
|
} else {
|
|
// Reflow the line if the line might have clearance now.
|
|
if (curY != newY) {
|
|
line->MarkDirty();
|
|
}
|
|
}
|
|
}
|
|
|
|
// We might have to reflow a line that is after a clearing BR.
|
|
if (inlineFloatBreakType != NS_STYLE_CLEAR_NONE) {
|
|
aState.mY = aState.ClearFloats(aState.mY, inlineFloatBreakType);
|
|
if (aState.mY != line->mBounds.y + deltaY) {
|
|
// SlideLine is not going to put the line where the clearance
|
|
// put it. Reflow the line to be sure.
|
|
line->MarkDirty();
|
|
}
|
|
inlineFloatBreakType = NS_STYLE_CLEAR_NONE;
|
|
}
|
|
|
|
PRBool previousMarginWasDirty = line->IsPreviousMarginDirty();
|
|
if (previousMarginWasDirty) {
|
|
// If the previous margin is dirty, reflow the current line
|
|
line->MarkDirty();
|
|
line->ClearPreviousMarginDirty();
|
|
} else if (line->mBounds.YMost() + deltaY > aState.mBottomEdge) {
|
|
// Lines that aren't dirty but get slid past our height constraint must
|
|
// be reflowed.
|
|
line->MarkDirty();
|
|
}
|
|
|
|
if (!line->IsDirty()) {
|
|
// See if there's any reflow damage that requires that we mark the
|
|
// line dirty.
|
|
PropagateFloatDamage(aState, line, deltaY);
|
|
}
|
|
|
|
if (needToRecoverState && line->IsDirty()) {
|
|
// We need to reconstruct the bottom margin only if we didn't
|
|
// reflow the previous line and we do need to reflow (or repair
|
|
// the top position of) the next line.
|
|
aState.ReconstructMarginAbove(line);
|
|
}
|
|
|
|
if (needToRecoverState) {
|
|
needToRecoverState = PR_FALSE;
|
|
|
|
// Update aState.mPrevChild as if we had reflowed all of the frames in
|
|
// this line. This is expensive in some cases, since it requires
|
|
// walking |GetNextSibling|.
|
|
if (line->IsDirty())
|
|
aState.mPrevChild = line.prev()->LastChild();
|
|
}
|
|
|
|
// Now repair the line and update |aState.mY| by calling
|
|
// |ReflowLine| or |SlideLine|.
|
|
if (line->IsDirty()) {
|
|
lastLineMovedUp = PR_TRUE;
|
|
|
|
PRBool maybeReflowingForFirstTime =
|
|
line->mBounds.x == 0 && line->mBounds.y == 0 &&
|
|
line->mBounds.width == 0 && line->mBounds.height == 0;
|
|
|
|
// Compute the dirty lines "before" YMost, after factoring in
|
|
// the running deltaY value - the running value is implicit in
|
|
// aState.mY.
|
|
nscoord oldY = line->mBounds.y;
|
|
nscoord oldYMost = line->mBounds.YMost();
|
|
|
|
// Reflow the dirty line. If it's an incremental reflow, then force
|
|
// it to invalidate the dirty area if necessary
|
|
rv = ReflowLine(aState, line, aTryPull, &keepGoing, doInvalidate);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (line->HasFloats()) {
|
|
reflowedFloat = PR_TRUE;
|
|
}
|
|
|
|
if (!keepGoing) {
|
|
DumpLine(aState, line, deltaY, -1);
|
|
if (0 == line->GetChildCount()) {
|
|
DeleteLine(aState, line, line_end);
|
|
}
|
|
break;
|
|
}
|
|
|
|
// Test to see whether the margin that should be carried out
|
|
// to the next line (NL) might have changed. In ReflowBlockFrame
|
|
// we call nextLine->MarkPreviousMarginDirty if the block's
|
|
// actual carried-out bottom margin changed. So here we only
|
|
// need to worry about the following effects:
|
|
// 1) the line was just created, and it might now be blocking
|
|
// a carried-out bottom margin from previous lines that
|
|
// used to reach NL from reaching NL
|
|
// 2) the line used to be empty, and is now not empty,
|
|
// thus blocking a carried-out bottom margin from previous lines
|
|
// that used to reach NL from reaching NL
|
|
// 3) the line wasn't empty, but now is, so a carried-out
|
|
// bottom margin from previous lines that didn't used to reach NL
|
|
// now does
|
|
// 4) the line might have changed in a way that affects NL's
|
|
// ShouldApplyTopMargin decision. The three things that matter
|
|
// are the line's emptiness, its adjacency to the top of the block,
|
|
// and whether it has clearance (the latter only matters if the block
|
|
// was and is adjacent to the top and empty).
|
|
//
|
|
// If the line is empty now, we can't reliably tell if the line was empty
|
|
// before, so we just assume it was and do nextLine->MarkPreviousMarginDirty.
|
|
// This means the checks in 4) are redundant; if the line is empty now
|
|
// we don't need to check 4), but if the line is not empty now and we're sure
|
|
// it wasn't empty before, any adjacency and clearance changes are irrelevant
|
|
// to the result of nextLine->ShouldApplyTopMargin.
|
|
if (line.next() != end_lines()) {
|
|
PRBool maybeWasEmpty = oldY == oldYMost;
|
|
PRBool isEmpty = line->mBounds.height == 0 && line->CachedIsEmpty();
|
|
if (maybeReflowingForFirstTime /*1*/ ||
|
|
(isEmpty || maybeWasEmpty) /*2/3/4*/) {
|
|
line.next()->MarkPreviousMarginDirty();
|
|
// since it's marked dirty, nobody will care about |deltaY|
|
|
}
|
|
}
|
|
|
|
// If the line was just reflowed for the first time, then its
|
|
// old mBounds cannot be trusted so this deltaY computation is
|
|
// bogus. But that's OK because we just did
|
|
// MarkPreviousMarginDirty on the next line which will force it
|
|
// to be reflowed, so this computation of deltaY will not be
|
|
// used.
|
|
deltaY = line->mBounds.YMost() - oldYMost;
|
|
} else {
|
|
lastLineMovedUp = deltaY < 0;
|
|
|
|
if (deltaY != 0)
|
|
SlideLine(aState, line, deltaY);
|
|
else
|
|
repositionViews = PR_TRUE;
|
|
|
|
// XXX EVIL O(N^2) EVIL
|
|
aState.RecoverStateFrom(line, deltaY);
|
|
|
|
// Keep mY up to date in case we're propagating reflow damage
|
|
// and also because our final height may depend on it. If the
|
|
// line is inlines, then only update mY if the line is not
|
|
// empty, because that's what PlaceLine does. (Empty blocks may
|
|
// want to update mY, e.g. if they have clearance.)
|
|
if (line->IsBlock() || !line->CachedIsEmpty()) {
|
|
aState.mY = line->mBounds.YMost();
|
|
|
|
if (aState.GetFlag(BRS_SHRINKWRAPWIDTH)) {
|
|
// Mark the line as dirty so once we known the final shrink
|
|
// wrap width we can reflow the line to the correct size.
|
|
// It's OK to skip doing this for empty lines of inlines.
|
|
// XXX We don't always need to do this...
|
|
// XXX For inlines, we could record in the line box
|
|
// that HorzontalAlignFrames does not depend on the line width,
|
|
// and thus we don't have to mark it dirty here
|
|
line->MarkDirty();
|
|
aState.SetFlag(BRS_NEEDRESIZEREFLOW, PR_TRUE);
|
|
}
|
|
}
|
|
|
|
needToRecoverState = PR_TRUE;
|
|
}
|
|
|
|
// Record if we need to clear floats before reflowing the next
|
|
// line. Note that inlineFloatBreakType will be handled and
|
|
// cleared before the next line is processed, so there is no
|
|
// need to combine break types here.
|
|
if (line->HasFloatBreakAfter()) {
|
|
inlineFloatBreakType = line->GetBreakTypeAfter();
|
|
}
|
|
|
|
if (LineHasClear(line.get())) {
|
|
foundAnyClears = PR_TRUE;
|
|
}
|
|
|
|
DumpLine(aState, line, deltaY, -1);
|
|
}
|
|
|
|
if (needToRecoverState) {
|
|
// Is this expensive?
|
|
aState.ReconstructMarginAbove(line);
|
|
|
|
// Update aState.mPrevChild as if we had reflowed all of the frames in
|
|
// the last line. This is expensive in some cases, since it requires
|
|
// walking |GetNextSibling|.
|
|
aState.mPrevChild = line.prev()->LastChild();
|
|
}
|
|
|
|
// Should we really have to do this?
|
|
if (repositionViews)
|
|
::PlaceFrameView(this);
|
|
|
|
// We can skip trying to pull up the next line if there is no next
|
|
// in flow or we were told not to or we know it will be futile, i.e.,
|
|
// -- the next in flow is not changing
|
|
// -- and we cannot have added more space for its first line to be
|
|
// pulled up into,
|
|
// -- and it's a not a resize reflow (so our width didn't change),
|
|
// -- and we didn't reflow any floats (so the available space
|
|
// didn't change)
|
|
if (!aState.mNextInFlow || !aTryPull ||
|
|
(aState.mReflowState.mFlags.mNextInFlowUntouched &&
|
|
!lastLineMovedUp &&
|
|
(aState.mReflowState.reason == eReflowReason_Incremental ||
|
|
aState.mReflowState.reason == eReflowReason_Dirty) &&
|
|
!reflowedFloat)) {
|
|
if (aState.mNextInFlow) {
|
|
aState.mReflowStatus |= NS_FRAME_NOT_COMPLETE;
|
|
}
|
|
} else {
|
|
// Pull data from a next-in-flow if there's still room for more
|
|
// content here.
|
|
while (keepGoing && (nsnull != aState.mNextInFlow)) {
|
|
// Grab first line from our next-in-flow
|
|
nsBlockFrame* nextInFlow = aState.mNextInFlow;
|
|
line_iterator nifLine = nextInFlow->begin_lines();
|
|
nsLineBox *toMove;
|
|
PRBool collectOverflowFloats;
|
|
if (nifLine != nextInFlow->end_lines()) {
|
|
if (HandleOverflowPlaceholdersOnPulledLine(aState, nifLine)) {
|
|
// go around again in case the line was deleted
|
|
continue;
|
|
}
|
|
toMove = nifLine;
|
|
nextInFlow->mLines.erase(nifLine);
|
|
collectOverflowFloats = PR_FALSE;
|
|
} else {
|
|
// Grab an overflow line if there are any
|
|
nsLineList* overflowLines = nextInFlow->GetOverflowLines();
|
|
if (overflowLines &&
|
|
HandleOverflowPlaceholdersOnPulledLine(aState, overflowLines->front())) {
|
|
// go around again in case the line was deleted
|
|
continue;
|
|
}
|
|
if (!overflowLines) {
|
|
aState.mNextInFlow =
|
|
NS_STATIC_CAST(nsBlockFrame*, nextInFlow->mNextInFlow);
|
|
continue;
|
|
}
|
|
nifLine = overflowLines->begin();
|
|
NS_ASSERTION(nifLine != overflowLines->end(),
|
|
"Stored overflow line list should not be empty");
|
|
toMove = nifLine;
|
|
nextInFlow->RemoveOverflowLines();
|
|
nifLine = overflowLines->erase(nifLine);
|
|
if (nifLine != overflowLines->end()) {
|
|
// We need to this remove-and-put-back dance because we want
|
|
// to avoid making the overflow line list empty while it's
|
|
// stored in the property (because the property has the
|
|
// invariant that the list is never empty).
|
|
nextInFlow->SetOverflowLines(overflowLines);
|
|
}
|
|
collectOverflowFloats = PR_TRUE;
|
|
}
|
|
|
|
if (0 == toMove->GetChildCount()) {
|
|
// The line is empty. Try the next one.
|
|
NS_ASSERTION(nsnull == toMove->mFirstChild, "bad empty line");
|
|
aState.FreeLineBox(toMove);
|
|
continue;
|
|
}
|
|
|
|
// XXX move to a subroutine: run-in, overflow, pullframe and this do this
|
|
// Make the children in the line ours.
|
|
nsIFrame* frame = toMove->mFirstChild;
|
|
nsIFrame* lastFrame = nsnull;
|
|
PRInt32 n = toMove->GetChildCount();
|
|
while (--n >= 0) {
|
|
ReparentFrame(frame, nextInFlow, this);
|
|
lastFrame = frame;
|
|
frame = frame->GetNextSibling();
|
|
}
|
|
lastFrame->SetNextSibling(nsnull);
|
|
|
|
// Reparent floats whose placeholders are in the line.
|
|
ReparentFloats(toMove->mFirstChild, nextInFlow, collectOverflowFloats, PR_TRUE);
|
|
|
|
// Add line to our line list
|
|
if (aState.mPrevChild) {
|
|
aState.mPrevChild->SetNextSibling(toMove->mFirstChild);
|
|
}
|
|
|
|
line = mLines.before_insert(end_lines(), toMove);
|
|
|
|
DumpLine(aState, toMove, deltaY, 0);
|
|
#ifdef DEBUG
|
|
AutoNoisyIndenter indent2(gNoisyReflow);
|
|
#endif
|
|
|
|
// Now reflow it and any lines that it makes during it's reflow
|
|
// (we have to loop here because reflowing the line may case a new
|
|
// line to be created; see SplitLine's callers for examples of
|
|
// when this happens).
|
|
while (line != end_lines()) {
|
|
NS_ASSERTION(aTryPull, "We shouldn't be in here if we can't pull!");
|
|
rv = ReflowLine(aState, line, PR_TRUE, &keepGoing, doInvalidate);
|
|
if (NS_FAILED(rv)) {
|
|
NS_WARNING("Line reflow failed");
|
|
return rv;
|
|
}
|
|
DumpLine(aState, line, deltaY, -1);
|
|
if (!keepGoing) {
|
|
if (0 == line->GetChildCount()) {
|
|
DeleteLine(aState, line, line_end);
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (LineHasClear(line.get())) {
|
|
foundAnyClears = PR_TRUE;
|
|
}
|
|
|
|
// If this is an inline frame then its time to stop
|
|
++line;
|
|
aState.AdvanceToNextLine();
|
|
}
|
|
}
|
|
|
|
if (NS_FRAME_IS_NOT_COMPLETE(aState.mReflowStatus)) {
|
|
aState.mReflowStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
|
|
}
|
|
}
|
|
|
|
// Handle an odd-ball case: a list-item with no lines
|
|
if (mBullet && HaveOutsideBullet() && mLines.empty()) {
|
|
nsHTMLReflowMetrics metrics(nsnull);
|
|
ReflowBullet(aState, metrics);
|
|
|
|
// There are no lines so we have to fake up some y motion so that
|
|
// we end up with *some* height.
|
|
aState.mY += metrics.height;
|
|
}
|
|
|
|
if (foundAnyClears) {
|
|
AddStateBits(NS_BLOCK_HAS_CLEAR_CHILDREN);
|
|
} else {
|
|
RemoveStateBits(NS_BLOCK_HAS_CLEAR_CHILDREN);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
IndentBy(stdout, gNoiseIndent - 1);
|
|
ListTag(stdout);
|
|
printf(": done reflowing dirty lines (status=%x)\n",
|
|
aState.mReflowStatus);
|
|
}
|
|
#endif
|
|
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::DeleteLine(nsBlockReflowState& aState,
|
|
nsLineList::iterator aLine,
|
|
nsLineList::iterator aLineEnd)
|
|
{
|
|
NS_PRECONDITION(0 == aLine->GetChildCount(), "can't delete !empty line");
|
|
if (0 == aLine->GetChildCount()) {
|
|
NS_ASSERTION(aState.mCurrentLine == aLine,
|
|
"using function more generally than designed, "
|
|
"but perhaps OK now");
|
|
nsLineBox *line = aLine;
|
|
aLine = mLines.erase(aLine);
|
|
aState.FreeLineBox(line);
|
|
// Mark the previous margin of the next line dirty since we need to
|
|
// recompute its top position.
|
|
if (aLine != aLineEnd)
|
|
aLine->MarkPreviousMarginDirty();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Takes two rectangles whose origins must be the same, and computes
|
|
* the difference between their union and their intersection as two
|
|
* rectangles. (This difference is a superset of the difference
|
|
* between the two rectangles.)
|
|
*/
|
|
static void GetRectDifferenceStrips(const nsRect& aR1, const nsRect& aR2,
|
|
nsRect* aHStrip, nsRect* aVStrip) {
|
|
NS_ASSERTION(aR1.TopLeft() == aR2.TopLeft(),
|
|
"expected rects at the same position");
|
|
nsRect unionRect(aR1.x, aR1.y, PR_MAX(aR1.width, aR2.width),
|
|
PR_MAX(aR1.height, aR2.height));
|
|
nscoord VStripStart = PR_MIN(aR1.width, aR2.width);
|
|
nscoord HStripStart = PR_MIN(aR1.height, aR2.height);
|
|
*aVStrip = unionRect;
|
|
aVStrip->x += VStripStart;
|
|
aVStrip->width -= VStripStart;
|
|
*aHStrip = unionRect;
|
|
aHStrip->y += HStripStart;
|
|
aHStrip->height -= HStripStart;
|
|
}
|
|
|
|
/**
|
|
* Reflow a line. The line will either contain a single block frame
|
|
* or contain 1 or more inline frames. aKeepReflowGoing indicates
|
|
* whether or not the caller should continue to reflow more lines.
|
|
*/
|
|
nsresult
|
|
nsBlockFrame::ReflowLine(nsBlockReflowState& aState,
|
|
line_iterator aLine,
|
|
PRBool aTryPull,
|
|
PRBool* aKeepReflowGoing,
|
|
PRBool aDamageDirtyArea)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
|
|
NS_ABORT_IF_FALSE(aLine->GetChildCount(), "reflowing empty line");
|
|
|
|
// Setup the line-layout for the new line
|
|
aState.mCurrentLine = aLine;
|
|
aLine->ClearDirty();
|
|
aLine->InvalidateCachedIsEmpty();
|
|
|
|
// Now that we know what kind of line we have, reflow it
|
|
if (aLine->IsBlock()) {
|
|
nsRect oldBounds = aLine->mFirstChild->GetRect();
|
|
nsRect oldCombinedArea(aLine->GetCombinedArea());
|
|
rv = ReflowBlockFrame(aState, aLine, aKeepReflowGoing);
|
|
nsRect newBounds = aLine->mFirstChild->GetRect();
|
|
|
|
// We expect blocks to damage any area inside their bounds that is
|
|
// dirty; however, if the frame changes size or position then we
|
|
// need to do some repainting.
|
|
// XXX roc --- the above statement is ambiguous about whether 'bounds'
|
|
// means the frame's bounds or overflowArea, and in fact this is a source
|
|
// of much confusion and bugs. Thus the following hack considers *both*
|
|
// overflowArea and bounds. This should be considered a temporary hack
|
|
// until we decide how it's really supposed to work.
|
|
if (aDamageDirtyArea) {
|
|
nsRect lineCombinedArea(aLine->GetCombinedArea());
|
|
if (oldCombinedArea.TopLeft() != lineCombinedArea.TopLeft() ||
|
|
oldBounds.TopLeft() != newBounds.TopLeft()) {
|
|
// The block has moved, and so to be safe we need to repaint
|
|
// XXX We need to improve on this...
|
|
nsRect dirtyRect;
|
|
dirtyRect.UnionRect(oldCombinedArea, lineCombinedArea);
|
|
#ifdef NOISY_BLOCK_INVALIDATE
|
|
printf("%p invalidate 6 (%d, %d, %d, %d)\n",
|
|
this, dirtyRect.x, dirtyRect.y, dirtyRect.width, dirtyRect.height);
|
|
#endif
|
|
Invalidate(dirtyRect);
|
|
} else {
|
|
nsRect combinedAreaHStrip, combinedAreaVStrip;
|
|
nsRect boundsHStrip, boundsVStrip;
|
|
GetRectDifferenceStrips(oldBounds, newBounds,
|
|
&boundsHStrip, &boundsVStrip);
|
|
GetRectDifferenceStrips(oldCombinedArea, lineCombinedArea,
|
|
&combinedAreaHStrip, &combinedAreaVStrip);
|
|
|
|
#ifdef NOISY_BLOCK_INVALIDATE
|
|
printf("%p invalidate boundsVStrip (%d, %d, %d, %d)\n",
|
|
this, boundsVStrip.x, boundsVStrip.y, boundsVStrip.width, boundsVStrip.height);
|
|
printf("%p invalidate boundsHStrip (%d, %d, %d, %d)\n",
|
|
this, boundsHStrip.x, boundsHStrip.y, boundsHStrip.width, boundsHStrip.height);
|
|
printf("%p invalidate combinedAreaVStrip (%d, %d, %d, %d)\n",
|
|
this, combinedAreaVStrip.x, combinedAreaVStrip.y, combinedAreaVStrip.width, combinedAreaVStrip.height);
|
|
printf("%p invalidate combinedAreaHStrip (%d, %d, %d, %d)\n",
|
|
this, combinedAreaHStrip.x, combinedAreaHStrip.y, combinedAreaHStrip.width, combinedAreaHStrip.height);
|
|
#endif
|
|
// The first thing Invalidate does is check if the rect is empty, so
|
|
// don't bother doing that here.
|
|
Invalidate(boundsVStrip);
|
|
Invalidate(boundsHStrip);
|
|
Invalidate(combinedAreaVStrip);
|
|
Invalidate(combinedAreaHStrip);
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
nsRect oldCombinedArea(aLine->GetCombinedArea());
|
|
aLine->SetLineWrapped(PR_FALSE);
|
|
|
|
// If we're supposed to update the maximum width, then we'll need to reflow
|
|
// the line with an unconstrained width (which will give us the new maximum
|
|
// width), then we'll reflow it again with the constrained width.
|
|
// We only do this if this is a beginning line, i.e., don't do this for
|
|
// lines associated with content that line wrapped (see ReflowDirtyLines()
|
|
// for details).
|
|
// XXX This approach doesn't work when floats are involved in which case
|
|
// we'll either need to recover the float state that applies to the
|
|
// unconstrained reflow or keep it around in a separate space manager...
|
|
PRBool isBeginningLine = aState.mCurrentLine == begin_lines() ||
|
|
!aState.mCurrentLine.prev()->IsLineWrapped();
|
|
// XXXldb Add &&!aState.GetFlag(BRS_UNCONSTRAINEDWIDTH)
|
|
// If we're not allowed to pull frames from our next-in-flow (e.g., during
|
|
// shrinkwrap) then we shouldn't be doing this.
|
|
if (aState.GetFlag(BRS_COMPUTEMAXWIDTH) && isBeginningLine && aTryPull) {
|
|
// First reflow the line with an unconstrained width.
|
|
nscoord oldY = aState.mY;
|
|
nsCollapsingMargin oldPrevBottomMargin(aState.mPrevBottomMargin);
|
|
PRBool oldUnconstrainedWidth = aState.GetFlag(BRS_UNCONSTRAINEDWIDTH);
|
|
|
|
#if defined(DEBUG_waterson) || defined(DEBUG_dbaron)
|
|
// XXXwaterson if oldUnconstrainedWidth was set, why do we need
|
|
// to do the second reflow, below?
|
|
|
|
if (oldUnconstrainedWidth)
|
|
printf("*** oldUnconstrainedWidth was already set.\n"
|
|
"*** This code (%s:%d) could be optimized a lot!\n"
|
|
"+++ possibly doing an unnecessary second-pass unconstrained "
|
|
"reflow\n",
|
|
__FILE__, __LINE__);
|
|
#endif
|
|
|
|
// When doing this we need to set the block reflow state's
|
|
// "mUnconstrainedWidth" variable to PR_TRUE so if we encounter
|
|
// a placeholder and then reflow its associated float we don't
|
|
// end up resetting the line's right edge and have it think the
|
|
// width is unconstrained...
|
|
aState.mSpaceManager->PushState();
|
|
aState.SetFlag(BRS_UNCONSTRAINEDWIDTH, PR_TRUE);
|
|
ReflowInlineFrames(aState, aLine, PR_TRUE, aKeepReflowGoing, aDamageDirtyArea, PR_TRUE);
|
|
aState.mY = oldY;
|
|
aState.mPrevBottomMargin = oldPrevBottomMargin;
|
|
aState.SetFlag(BRS_UNCONSTRAINEDWIDTH, oldUnconstrainedWidth);
|
|
aState.mSpaceManager->PopState();
|
|
|
|
// Update the line's maximum width
|
|
aLine->mMaximumWidth = aLine->mBounds.XMost();
|
|
#ifdef NOISY_MAXIMUM_WIDTH
|
|
printf("nsBlockFrame::ReflowLine block %p line %p setting aLine.mMaximumWidth to %d\n",
|
|
this, NS_STATIC_CAST(void*, aLine.get()), aLine->mMaximumWidth);
|
|
#endif
|
|
aState.UpdateMaximumWidth(aLine->mMaximumWidth);
|
|
|
|
// Now reflow the line again this time without having it compute
|
|
// the maximum width.
|
|
// We leave whether to compute max-element-width as-is, because
|
|
// making this call throws out the previous max-element-width
|
|
// information stored in the float cache.
|
|
nscoord oldComputeMaximumWidth = aState.GetFlag(BRS_COMPUTEMAXWIDTH);
|
|
|
|
aState.SetFlag(BRS_COMPUTEMAXWIDTH, PR_FALSE);
|
|
rv = ReflowInlineFrames(aState, aLine, PR_TRUE, aKeepReflowGoing, aDamageDirtyArea);
|
|
aState.SetFlag(BRS_COMPUTEMAXWIDTH, oldComputeMaximumWidth);
|
|
|
|
} else {
|
|
rv = ReflowInlineFrames(aState, aLine, aTryPull, aKeepReflowGoing, aDamageDirtyArea);
|
|
if (NS_SUCCEEDED(rv))
|
|
{
|
|
if (aState.GetFlag(BRS_COMPUTEMAXWIDTH))
|
|
{
|
|
#ifdef NOISY_MAXIMUM_WIDTH
|
|
printf("nsBlockFrame::ReflowLine block %p line %p setting aLine.mMaximumWidth to %d\n",
|
|
this, NS_STATIC_CAST(void*, aLine.get()), aLine->mMaximumWidth);
|
|
#endif
|
|
aState.UpdateMaximumWidth(aLine->mMaximumWidth);
|
|
}
|
|
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTWIDTH))
|
|
{
|
|
#ifdef DEBUG
|
|
if (gNoisyMaxElementWidth) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
printf("nsBlockFrame::ReflowLine block %p line %p setting aLine.mMaxElementWidth to %d\n",
|
|
NS_STATIC_CAST(void*, this), NS_STATIC_CAST(void*, aLine.get()),
|
|
aLine->mMaxElementWidth);
|
|
}
|
|
#endif
|
|
aState.UpdateMaxElementWidth(aLine->mMaxElementWidth);
|
|
}
|
|
}
|
|
}
|
|
|
|
// We don't really know what changed in the line, so use the union
|
|
// of the old and new combined areas
|
|
if (aDamageDirtyArea) {
|
|
nsRect dirtyRect;
|
|
dirtyRect.UnionRect(oldCombinedArea, aLine->GetCombinedArea());
|
|
#ifdef NOISY_BLOCK_INVALIDATE
|
|
printf("%p invalidate because %s is true (%d, %d, %d, %d)\n",
|
|
this, aDamageDirtyArea ? "aDamageDirtyArea" : "aLine->IsForceInvalidate",
|
|
dirtyRect.x, dirtyRect.y, dirtyRect.width, dirtyRect.height);
|
|
if (aLine->IsForceInvalidate())
|
|
printf(" dirty line is %p\n", NS_STATIC_CAST(void*, aLine.get());
|
|
#endif
|
|
Invalidate(dirtyRect);
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
/**
|
|
* Pull frame from the next available location (one of our lines or
|
|
* one of our next-in-flows lines).
|
|
*/
|
|
nsresult
|
|
nsBlockFrame::PullFrame(nsBlockReflowState& aState,
|
|
line_iterator aLine,
|
|
PRBool aDamageDeletedLines,
|
|
nsIFrame*& aFrameResult)
|
|
{
|
|
aFrameResult = nsnull;
|
|
|
|
// First check our remaining lines
|
|
if (end_lines() != aLine.next()) {
|
|
#ifdef DEBUG
|
|
PRBool retry =
|
|
#endif
|
|
PullFrameFrom(aState, aLine, this, PR_FALSE, aLine.next(),
|
|
aDamageDeletedLines, aFrameResult);
|
|
NS_ASSERTION(!retry, "Shouldn't have to retry in the current block");
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_ASSERTION(!GetOverflowLines(),
|
|
"Our overflow lines should have been removed at the start of reflow");
|
|
|
|
// Try each next in flows
|
|
nsBlockFrame* nextInFlow = aState.mNextInFlow;
|
|
while (nextInFlow) {
|
|
// first normal lines, then overflow lines
|
|
if (!nextInFlow->mLines.empty()) {
|
|
if (PullFrameFrom(aState, aLine, nextInFlow, PR_FALSE,
|
|
nextInFlow->mLines.begin(),
|
|
aDamageDeletedLines, aFrameResult)) {
|
|
// try again with the same value of nextInFlow
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
nsLineList* overflowLines = nextInFlow->GetOverflowLines();
|
|
if (overflowLines) {
|
|
if (PullFrameFrom(aState, aLine, nextInFlow, PR_TRUE,
|
|
overflowLines->begin(),
|
|
aDamageDeletedLines, aFrameResult)) {
|
|
// try again with the same value of nextInFlow
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
nextInFlow = (nsBlockFrame*) nextInFlow->mNextInFlow;
|
|
aState.mNextInFlow = nextInFlow;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
/**
|
|
* Try to pull a frame out of a line pointed at by aFromLine. If
|
|
* aUpdateGeometricParent is set then the pulled frames geometric parent
|
|
* will be updated (e.g. when pulling from a next-in-flows line list).
|
|
*
|
|
* Note: pulling a frame from a line that is a place-holder frame
|
|
* doesn't automatically remove the corresponding float from the
|
|
* line's float array. This happens indirectly: either the line gets
|
|
* emptied (and destroyed) or the line gets reflowed (because we mark
|
|
* it dirty) and the code at the top of ReflowLine empties the
|
|
* array. So eventually, it will be removed, just not right away.
|
|
*
|
|
* @return PR_TRUE to force retrying of the pull.
|
|
*/
|
|
PRBool
|
|
nsBlockFrame::PullFrameFrom(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
nsBlockFrame* aFromContainer,
|
|
PRBool aFromOverflowLine,
|
|
nsLineList::iterator aFromLine,
|
|
PRBool aDamageDeletedLines,
|
|
nsIFrame*& aFrameResult)
|
|
{
|
|
nsLineBox* fromLine = aFromLine;
|
|
NS_ABORT_IF_FALSE(fromLine, "bad line to pull from");
|
|
NS_ABORT_IF_FALSE(fromLine->GetChildCount(), "empty line");
|
|
NS_ABORT_IF_FALSE(aLine->GetChildCount(), "empty line");
|
|
|
|
NS_ASSERTION(fromLine->IsBlock() == fromLine->mFirstChild->GetStyleDisplay()->IsBlockLevel(),
|
|
"Disagreement about whether it's a block or not");
|
|
|
|
if (fromLine->IsBlock()) {
|
|
// If our line is not empty and the child in aFromLine is a block
|
|
// then we cannot pull up the frame into this line. In this case
|
|
// we stop pulling.
|
|
aFrameResult = nsnull;
|
|
}
|
|
else {
|
|
// Take frame from fromLine
|
|
nsIFrame* frame = fromLine->mFirstChild;
|
|
|
|
if (aFromContainer != this) {
|
|
if (HandleOverflowPlaceholdersForPulledFrame(aState, frame)) {
|
|
// we lost this one, retry
|
|
return PR_TRUE;
|
|
}
|
|
|
|
aLine->LastChild()->SetNextSibling(frame);
|
|
}
|
|
// when aFromContainer is 'this', then aLine->LastChild()'s next sibling
|
|
// is already set correctly.
|
|
aLine->SetChildCount(aLine->GetChildCount() + 1);
|
|
|
|
PRInt32 fromLineChildCount = fromLine->GetChildCount();
|
|
if (0 != --fromLineChildCount) {
|
|
// Mark line dirty now that we pulled a child
|
|
fromLine->SetChildCount(fromLineChildCount);
|
|
fromLine->MarkDirty();
|
|
fromLine->mFirstChild = frame->GetNextSibling();
|
|
}
|
|
else {
|
|
// Free up the fromLine now that it's empty
|
|
// Its bounds might need to be redrawn, though.
|
|
// XXX WHY do we invalidate the bounds AND the combined area? doesn't
|
|
// the combined area always enclose the bounds?
|
|
if (aDamageDeletedLines) {
|
|
Invalidate(fromLine->mBounds);
|
|
}
|
|
nsLineList* fromLineList = aFromOverflowLine
|
|
? aFromContainer->RemoveOverflowLines()
|
|
: &aFromContainer->mLines;
|
|
if (aFromLine.next() != fromLineList->end())
|
|
aFromLine.next()->MarkPreviousMarginDirty();
|
|
|
|
Invalidate(fromLine->GetCombinedArea());
|
|
fromLineList->erase(aFromLine);
|
|
// Note that aFromLine just got incremented, so don't use it again here!
|
|
aState.FreeLineBox(fromLine);
|
|
|
|
// Put any remaining overflow lines back.
|
|
if (aFromOverflowLine && !fromLineList->empty()) {
|
|
aFromContainer->SetOverflowLines(fromLineList);
|
|
}
|
|
}
|
|
|
|
// Change geometric parents
|
|
if (aFromContainer != this) {
|
|
// When pushing and pulling frames we need to check for whether any
|
|
// views need to be reparented
|
|
NS_ASSERTION(frame->GetParent() == aFromContainer, "unexpected parent frame");
|
|
|
|
ReparentFrame(frame, aFromContainer, this);
|
|
|
|
// The frame is being pulled from a next-in-flow; therefore we
|
|
// need to add it to our sibling list.
|
|
frame->SetNextSibling(nsnull);
|
|
if (nsnull != aState.mPrevChild) {
|
|
aState.mPrevChild->SetNextSibling(frame);
|
|
}
|
|
|
|
// The frame might have (or contain) floats that need to be
|
|
// brought over too.
|
|
ReparentFloats(frame, aFromContainer, aFromOverflowLine, PR_TRUE);
|
|
}
|
|
|
|
// Stop pulling because we found a frame to pull
|
|
aFrameResult = frame;
|
|
#ifdef DEBUG
|
|
VerifyLines(PR_TRUE);
|
|
#endif
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
static void
|
|
PlaceFrameView(nsIFrame* aFrame)
|
|
{
|
|
if (aFrame->HasView())
|
|
nsContainerFrame::PositionFrameView(aFrame);
|
|
else
|
|
nsContainerFrame::PositionChildViews(aFrame);
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::SlideLine(nsBlockReflowState& aState,
|
|
nsLineBox* aLine, nscoord aDY)
|
|
{
|
|
NS_PRECONDITION(aDY != 0, "why slide a line nowhere?");
|
|
|
|
Invalidate(aLine->GetCombinedArea());
|
|
// Adjust line state
|
|
aLine->SlideBy(aDY);
|
|
Invalidate(aLine->GetCombinedArea());
|
|
|
|
// Adjust the frames in the line
|
|
nsIFrame* kid = aLine->mFirstChild;
|
|
if (!kid) {
|
|
return;
|
|
}
|
|
|
|
if (aLine->IsBlock()) {
|
|
if (aDY) {
|
|
nsPoint p = kid->GetPosition();
|
|
p.y += aDY;
|
|
kid->SetPosition(p);
|
|
}
|
|
|
|
// Make sure the frame's view and any child views are updated
|
|
::PlaceFrameView(kid);
|
|
}
|
|
else {
|
|
// Adjust the Y coordinate of the frames in the line.
|
|
// Note: we need to re-position views even if aDY is 0, because
|
|
// one of our parent frames may have moved and so the view's position
|
|
// relative to its parent may have changed
|
|
PRInt32 n = aLine->GetChildCount();
|
|
while (--n >= 0) {
|
|
if (aDY) {
|
|
nsPoint p = kid->GetPosition();
|
|
p.y += aDY;
|
|
kid->SetPosition(p);
|
|
}
|
|
// Make sure the frame's view and any child views are updated
|
|
::PlaceFrameView(kid);
|
|
kid = kid->GetNextSibling();
|
|
}
|
|
}
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::AttributeChanged(nsIContent* aChild,
|
|
PRInt32 aNameSpaceID,
|
|
nsIAtom* aAttribute,
|
|
PRInt32 aModType)
|
|
{
|
|
nsresult rv = nsBlockFrameSuper::AttributeChanged(aChild, aNameSpaceID,
|
|
aAttribute, aModType);
|
|
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
if (nsHTMLAtoms::start == aAttribute) {
|
|
nsPresContext* presContext = GetPresContext();
|
|
|
|
// XXX Not sure if this is necessary anymore
|
|
RenumberLists(presContext);
|
|
|
|
rv = presContext->PresShell()->
|
|
AppendReflowCommand(this, eReflowType_ContentChanged, nsnull);
|
|
}
|
|
else if (nsHTMLAtoms::value == aAttribute) {
|
|
const nsStyleDisplay* styleDisplay = GetStyleDisplay();
|
|
if (NS_STYLE_DISPLAY_LIST_ITEM == styleDisplay->mDisplay) {
|
|
nsIFrame* nextAncestor = mParent;
|
|
nsBlockFrame* blockParent = nsnull;
|
|
|
|
// Search for the closest ancestor that's a block frame. We
|
|
// make the assumption that all related list items share a
|
|
// common block parent.
|
|
// XXXldb I think that's a bad assumption.
|
|
while (nextAncestor) {
|
|
if (NS_OK == nextAncestor->QueryInterface(kBlockFrameCID,
|
|
(void**)&blockParent)) {
|
|
break;
|
|
}
|
|
nextAncestor = nextAncestor->GetParent();
|
|
}
|
|
|
|
// Tell the enclosing block frame to renumber list items within
|
|
// itself
|
|
if (nsnull != blockParent) {
|
|
nsPresContext* presContext = GetPresContext();
|
|
// XXX Not sure if this is necessary anymore
|
|
blockParent->RenumberLists(presContext);
|
|
|
|
rv = presContext->PresShell()->
|
|
AppendReflowCommand(blockParent, eReflowType_ContentChanged, nsnull);
|
|
}
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
inline PRBool
|
|
IsPaddingZero(nsStyleUnit aUnit, nsStyleCoord &aCoord)
|
|
{
|
|
return (aUnit == eStyleUnit_Null ||
|
|
(aUnit == eStyleUnit_Coord && aCoord.GetCoordValue() == 0) ||
|
|
(aUnit == eStyleUnit_Percent && aCoord.GetPercentValue() == 0.0));
|
|
}
|
|
|
|
inline PRBool
|
|
IsMarginZero(nsStyleUnit aUnit, nsStyleCoord &aCoord)
|
|
{
|
|
return (aUnit == eStyleUnit_Null ||
|
|
aUnit == eStyleUnit_Auto ||
|
|
(aUnit == eStyleUnit_Coord && aCoord.GetCoordValue() == 0) ||
|
|
(aUnit == eStyleUnit_Percent && aCoord.GetPercentValue() == 0.0));
|
|
}
|
|
|
|
/* virtual */ PRBool
|
|
nsBlockFrame::IsSelfEmpty()
|
|
{
|
|
const nsStylePosition* position = GetStylePosition();
|
|
|
|
switch (position->mMinHeight.GetUnit()) {
|
|
case eStyleUnit_Coord:
|
|
if (position->mMinHeight.GetCoordValue() != 0)
|
|
return PR_FALSE;
|
|
break;
|
|
case eStyleUnit_Percent:
|
|
if (position->mMinHeight.GetPercentValue() != 0.0f)
|
|
return PR_FALSE;
|
|
break;
|
|
default:
|
|
return PR_FALSE;
|
|
}
|
|
|
|
switch (position->mHeight.GetUnit()) {
|
|
case eStyleUnit_Auto:
|
|
break;
|
|
case eStyleUnit_Coord:
|
|
if (position->mHeight.GetCoordValue() != 0)
|
|
return PR_FALSE;
|
|
break;
|
|
case eStyleUnit_Percent:
|
|
if (position->mHeight.GetPercentValue() != 0.0f)
|
|
return PR_FALSE;
|
|
break;
|
|
default:
|
|
return PR_FALSE;
|
|
}
|
|
|
|
const nsStyleBorder* border = GetStyleBorder();
|
|
const nsStylePadding* padding = GetStylePadding();
|
|
nsStyleCoord coord;
|
|
if (border->GetBorderWidth(NS_SIDE_TOP) != 0 ||
|
|
border->GetBorderWidth(NS_SIDE_BOTTOM) != 0 ||
|
|
!IsPaddingZero(padding->mPadding.GetTopUnit(),
|
|
padding->mPadding.GetTop(coord)) ||
|
|
!IsPaddingZero(padding->mPadding.GetBottomUnit(),
|
|
padding->mPadding.GetBottom(coord))) {
|
|
return PR_FALSE;
|
|
}
|
|
|
|
return PR_TRUE;
|
|
}
|
|
|
|
PRBool
|
|
nsBlockFrame::IsEmpty()
|
|
{
|
|
if (!IsSelfEmpty()) {
|
|
return PR_FALSE;
|
|
}
|
|
|
|
for (line_iterator line = begin_lines(), line_end = end_lines();
|
|
line != line_end;
|
|
++line)
|
|
{
|
|
if (!line->IsEmpty())
|
|
return PR_FALSE;
|
|
}
|
|
|
|
return PR_TRUE;
|
|
}
|
|
|
|
PRBool
|
|
nsBlockFrame::ShouldApplyTopMargin(nsBlockReflowState& aState,
|
|
nsLineBox* aLine)
|
|
{
|
|
if (aState.GetFlag(BRS_APPLYTOPMARGIN)) {
|
|
// Apply short-circuit check to avoid searching the line list
|
|
return PR_TRUE;
|
|
}
|
|
|
|
if (!aState.IsAdjacentWithTop()) {
|
|
// If we aren't at the top Y coordinate then something of non-zero
|
|
// height must have been placed. Therefore the childs top-margin
|
|
// applies.
|
|
aState.SetFlag(BRS_APPLYTOPMARGIN, PR_TRUE);
|
|
return PR_TRUE;
|
|
}
|
|
|
|
// Determine if this line is "essentially" the first line
|
|
for (line_iterator line = begin_lines(); line != aLine; ++line) {
|
|
if (!line->CachedIsEmpty() || line->HasClearance()) {
|
|
// A line which preceeds aLine is non-empty, or has clearance,
|
|
// so therefore the top margin applies.
|
|
aState.SetFlag(BRS_APPLYTOPMARGIN, PR_TRUE);
|
|
return PR_TRUE;
|
|
}
|
|
// No need to apply the top margin if the line has floats. We
|
|
// should collapse anyway (bug 44419)
|
|
}
|
|
|
|
// The line being reflowed is "essentially" the first line in the
|
|
// block. Therefore its top-margin will be collapsed by the
|
|
// generational collapsing logic with its parent (us).
|
|
return PR_FALSE;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsBlockFrame::GetTopBlockChild(nsPresContext* aPresContext)
|
|
{
|
|
if (mLines.empty())
|
|
return nsnull;
|
|
|
|
nsLineBox *firstLine = mLines.front();
|
|
if (firstLine->IsBlock())
|
|
return firstLine->mFirstChild;
|
|
|
|
if (!firstLine->CachedIsEmpty())
|
|
return nsnull;
|
|
|
|
line_iterator secondLine = begin_lines();
|
|
++secondLine;
|
|
if (secondLine == end_lines() || !secondLine->IsBlock())
|
|
return nsnull;
|
|
|
|
return secondLine->mFirstChild;
|
|
}
|
|
|
|
// If placeholders/floats split during reflowing a line, but that line will
|
|
// be put on the next page, then put the placeholders/floats back the way
|
|
// they were before the line was reflowed.
|
|
void
|
|
nsBlockFrame::UndoSplitPlaceholders(nsBlockReflowState& aState,
|
|
nsIFrame* aLastPlaceholder)
|
|
{
|
|
nsIFrame* undoPlaceholder;
|
|
if (aLastPlaceholder) {
|
|
undoPlaceholder = aLastPlaceholder->GetNextSibling();
|
|
aLastPlaceholder->SetNextSibling(nsnull);
|
|
}
|
|
else {
|
|
undoPlaceholder = aState.mOverflowPlaceholders.FirstChild();
|
|
aState.mOverflowPlaceholders.SetFrames(nsnull);
|
|
}
|
|
// remove the next in flows of the placeholders that need to be removed
|
|
for (nsPlaceholderFrame* placeholder = NS_STATIC_CAST(nsPlaceholderFrame*, undoPlaceholder);
|
|
placeholder; ) {
|
|
NS_ASSERTION(!placeholder->GetNextInFlow(), "Must be the last placeholder");
|
|
|
|
nsFrameManager* fm = aState.mPresContext->GetPresShell()->FrameManager();
|
|
fm->UnregisterPlaceholderFrame(placeholder);
|
|
placeholder->SetOutOfFlowFrame(nsnull);
|
|
|
|
// XXX we probably should be doing something with oof here. But what?
|
|
|
|
nsSplittableFrame::RemoveFromFlow(placeholder);
|
|
nsIFrame* savePlaceholder = placeholder;
|
|
placeholder = NS_STATIC_CAST(nsPlaceholderFrame*, placeholder->GetNextSibling());
|
|
savePlaceholder->Destroy(aState.mPresContext);
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::ReflowBlockFrame(nsBlockReflowState& aState,
|
|
line_iterator aLine,
|
|
PRBool* aKeepReflowGoing)
|
|
{
|
|
NS_PRECONDITION(*aKeepReflowGoing, "bad caller");
|
|
|
|
nsresult rv = NS_OK;
|
|
|
|
nsIFrame* frame = aLine->mFirstChild;
|
|
if (!frame) {
|
|
NS_ASSERTION(PR_FALSE, "program error - unexpected empty line");
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
|
|
// Prepare the block reflow engine
|
|
const nsStyleDisplay* display = frame->GetStyleDisplay();
|
|
nsBlockReflowContext brc(aState.mPresContext, aState.mReflowState,
|
|
aState.GetFlag(BRS_COMPUTEMAXELEMENTWIDTH),
|
|
aState.GetFlag(BRS_COMPUTEMAXWIDTH));
|
|
|
|
PRUint8 breakType = display->mBreakType;
|
|
// If a float split and its prev-in-flow was followed by a <BR>, then combine
|
|
// the <BR>'s break type with the block's break type (the block will be the very
|
|
// next frame after the split float).
|
|
if (NS_STYLE_CLEAR_NONE != aState.mFloatBreakType) {
|
|
breakType = nsLayoutUtils::CombineBreakType(breakType,
|
|
aState.mFloatBreakType);
|
|
aState.mFloatBreakType = NS_STYLE_CLEAR_NONE;
|
|
}
|
|
|
|
// Clear past floats before the block if the clear style is not none
|
|
aLine->SetBreakTypeBefore(breakType);
|
|
|
|
// See if we should apply the top margin. If the block frame being
|
|
// reflowed is a continuation (non-null prev-in-flow) then we don't
|
|
// apply its top margin because its not significant. Otherwise, dig
|
|
// deeper.
|
|
PRBool applyTopMargin =
|
|
!frame->GetPrevInFlow() && ShouldApplyTopMargin(aState, aLine);
|
|
|
|
if (applyTopMargin) {
|
|
// The HasClearance setting is only valid if ShouldApplyTopMargin
|
|
// returned PR_FALSE (in which case the top-margin-root set our
|
|
// clearance flag). Otherwise clear it now. We'll set it later on
|
|
// ourselves if necessary.
|
|
aLine->ClearHasClearance();
|
|
}
|
|
PRBool treatWithClearance = aLine->HasClearance();
|
|
// If our top margin was counted as part of some parents top-margin
|
|
// collapse and we are being speculatively reflowed assuming this
|
|
// frame DID NOT need clearance, then we need to check that
|
|
// assumption.
|
|
if (!treatWithClearance && !applyTopMargin && breakType != NS_STYLE_CLEAR_NONE &&
|
|
aState.mReflowState.mDiscoveredClearance) {
|
|
nscoord curY = aState.mY + aState.mPrevBottomMargin.get();
|
|
nscoord clearY = aState.ClearFloats(curY, breakType);
|
|
if (clearY != curY) {
|
|
// Looks like that assumption was invalid, we do need
|
|
// clearance. Tell our ancestor so it can reflow again. It is
|
|
// responsible for actually setting our clearance flag before
|
|
// the next reflow.
|
|
treatWithClearance = PR_TRUE;
|
|
// Only record the first frame that requires clearance
|
|
if (!*aState.mReflowState.mDiscoveredClearance) {
|
|
*aState.mReflowState.mDiscoveredClearance = frame;
|
|
}
|
|
// Exactly what we do now is flexible since we'll definitely be
|
|
// reflowed.
|
|
}
|
|
}
|
|
if (treatWithClearance) {
|
|
applyTopMargin = PR_TRUE;
|
|
}
|
|
|
|
nsIFrame* clearanceFrame = nsnull;
|
|
nscoord startingY = aState.mY;
|
|
nsCollapsingMargin incomingMargin = aState.mPrevBottomMargin;
|
|
nscoord clearance;
|
|
while (PR_TRUE) {
|
|
clearance = 0;
|
|
nscoord topMargin = 0;
|
|
PRBool mayNeedRetry = PR_FALSE;
|
|
if (applyTopMargin) {
|
|
// Precompute the blocks top margin value so that we can get the
|
|
// correct available space (there might be a float that's
|
|
// already been placed below the aState.mPrevBottomMargin
|
|
|
|
// Setup a reflowState to get the style computed margin-top
|
|
// value. We'll use a reason of `resize' so that we don't fudge
|
|
// any incremental reflow state.
|
|
|
|
// The availSpace here is irrelevant to our needs - all we want
|
|
// out if this setup is the margin-top value which doesn't depend
|
|
// on the childs available space.
|
|
// XXX building a complete nsHTMLReflowState just to get the margin-top
|
|
// seems like a waste. And we do this for almost every block!
|
|
nsSize availSpace(aState.mContentArea.width, NS_UNCONSTRAINEDSIZE);
|
|
nsHTMLReflowState reflowState(aState.mPresContext, aState.mReflowState,
|
|
frame, availSpace, eReflowReason_Resize);
|
|
|
|
if (treatWithClearance) {
|
|
aState.mY += aState.mPrevBottomMargin.get();
|
|
aState.mPrevBottomMargin.Zero();
|
|
}
|
|
|
|
// Now compute the collapsed margin-top value into aState.mPrevBottomMargin, assuming
|
|
// that all child margins collapse down to clearanceFrame.
|
|
nsBlockReflowContext::ComputeCollapsedTopMargin(reflowState,
|
|
&aState.mPrevBottomMargin, clearanceFrame, &mayNeedRetry);
|
|
|
|
// XXX optimization; we could check the collapsing children to see if they are sure
|
|
// to require clearance, and so avoid retrying them
|
|
|
|
if (clearanceFrame) {
|
|
// Don't allow retries on the second pass. The clearance decisions for the
|
|
// blocks whose top-margins collapse with ours are now fixed.
|
|
mayNeedRetry = PR_FALSE;
|
|
}
|
|
|
|
if (!treatWithClearance && !clearanceFrame && breakType != NS_STYLE_CLEAR_NONE) {
|
|
// We don't know if we need clearance and this is the first,
|
|
// optimistic pass. So determine whether *this block* needs
|
|
// clearance. Note that we do not allow the decision for whether
|
|
// this block has clearance to change on the second pass; that
|
|
// decision is only allowed to be made under the optimistic
|
|
// first pass.
|
|
nscoord curY = aState.mY + aState.mPrevBottomMargin.get();
|
|
nscoord clearY = aState.ClearFloats(curY, breakType);
|
|
if (clearY != curY) {
|
|
// Looks like we need clearance and we didn't know about it already. So
|
|
// recompute collapsed margin
|
|
treatWithClearance = PR_TRUE;
|
|
// Remember this decision, needed for incremental reflow
|
|
aLine->SetHasClearance();
|
|
|
|
// Apply incoming margins
|
|
aState.mY += aState.mPrevBottomMargin.get();
|
|
aState.mPrevBottomMargin.Zero();
|
|
|
|
// Compute the collapsed margin again, ignoring the incoming margin this time
|
|
mayNeedRetry = PR_FALSE;
|
|
nsBlockReflowContext::ComputeCollapsedTopMargin(reflowState,
|
|
&aState.mPrevBottomMargin, clearanceFrame, &mayNeedRetry);
|
|
}
|
|
}
|
|
|
|
// Temporarily advance the running Y value so that the
|
|
// GetAvailableSpace method will return the right available
|
|
// space. This undone as soon as the horizontal margins are
|
|
// computed.
|
|
topMargin = aState.mPrevBottomMargin.get();
|
|
|
|
if (treatWithClearance) {
|
|
nscoord currentY = aState.mY;
|
|
// advance mY to the clear position.
|
|
aState.mY = aState.ClearFloats(aState.mY, breakType);
|
|
|
|
// Compute clearance. It's the amount we need to add to the top
|
|
// border-edge of the frame, after applying collapsed margins
|
|
// from the frame and its children, to get it to line up with
|
|
// the bottom of the floats. The former is currentY + topMargin,
|
|
// the latter is the current aState.mY.
|
|
// Note that negative clearance is possible
|
|
clearance = aState.mY - (currentY + topMargin);
|
|
|
|
// Add clearance to our top margin while we compute available
|
|
// space for the frame
|
|
topMargin += clearance;
|
|
|
|
// Note that aState.mY should stay where it is: at the top
|
|
// border-edge of the frame
|
|
} else {
|
|
// Advance aState.mY to the top border-edge of the frame.
|
|
aState.mY += topMargin;
|
|
}
|
|
}
|
|
|
|
// Here aState.mY is the top border-edge of the block.
|
|
// Compute the available space for the block
|
|
aState.GetAvailableSpace();
|
|
#ifdef REALLY_NOISY_REFLOW
|
|
printf("setting line %p isImpacted to %s\n", aLine.get(), aState.IsImpactedByFloat()?"true":"false");
|
|
#endif
|
|
PRBool isImpacted = aState.IsImpactedByFloat() ? PR_TRUE : PR_FALSE;
|
|
aLine->SetLineIsImpactedByFloat(isImpacted);
|
|
nsSplittableType splitType = NS_FRAME_NOT_SPLITTABLE;
|
|
frame->IsSplittable(splitType);
|
|
nsRect availSpace;
|
|
aState.ComputeBlockAvailSpace(frame, splitType, display, availSpace);
|
|
|
|
// Now put the Y coordinate back to the top of the top-margin +
|
|
// clearance, and flow the block.
|
|
aState.mY -= topMargin;
|
|
availSpace.y -= topMargin;
|
|
if (NS_UNCONSTRAINEDSIZE != availSpace.height) {
|
|
availSpace.height += topMargin;
|
|
}
|
|
|
|
// keep track of the last overflow float in case we need to undo any new additions
|
|
nsIFrame* lastPlaceholder = aState.mOverflowPlaceholders.LastChild();
|
|
|
|
// Reflow the block into the available space
|
|
nsMargin computedOffsets;
|
|
// construct the html reflow state for the block. ReflowBlock
|
|
// will initialize it
|
|
nsHTMLReflowState blockHtmlRS(aState.mPresContext, aState.mReflowState, frame,
|
|
nsSize(availSpace.width, availSpace.height),
|
|
aState.mReflowState.reason, PR_TRUE);
|
|
blockHtmlRS.mFlags.mHasClearance = aLine->HasClearance();
|
|
|
|
if (mayNeedRetry) {
|
|
blockHtmlRS.mDiscoveredClearance = &clearanceFrame;
|
|
aState.mSpaceManager->PushState();
|
|
} else if (!applyTopMargin) {
|
|
blockHtmlRS.mDiscoveredClearance = aState.mReflowState.mDiscoveredClearance;
|
|
}
|
|
|
|
nsReflowStatus frameReflowStatus = NS_FRAME_COMPLETE;
|
|
rv = brc.ReflowBlock(availSpace, applyTopMargin, aState.mPrevBottomMargin,
|
|
clearance, aState.IsAdjacentWithTop(), computedOffsets,
|
|
blockHtmlRS, frameReflowStatus);
|
|
|
|
// Remove the frame from the reflow tree.
|
|
if (aState.mReflowState.path)
|
|
aState.mReflowState.path->RemoveChild(frame);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (mayNeedRetry) {
|
|
if (clearanceFrame) {
|
|
UndoSplitPlaceholders(aState, lastPlaceholder);
|
|
aState.mSpaceManager->PopState();
|
|
aState.mY = startingY;
|
|
aState.mPrevBottomMargin = incomingMargin;
|
|
continue;
|
|
} else {
|
|
// pop the saved state off the stack and discard it, because we
|
|
// want to keep the current state, since our speculation
|
|
// succeeded
|
|
aState.mSpaceManager->DiscardState();
|
|
}
|
|
}
|
|
|
|
aState.mPrevChild = frame;
|
|
|
|
#if defined(REFLOW_STATUS_COVERAGE)
|
|
RecordReflowStatus(PR_TRUE, frameReflowStatus);
|
|
#endif
|
|
|
|
if (NS_INLINE_IS_BREAK_BEFORE(frameReflowStatus)) {
|
|
// None of the child block fits.
|
|
UndoSplitPlaceholders(aState, lastPlaceholder);
|
|
PushLines(aState, aLine.prev());
|
|
*aKeepReflowGoing = PR_FALSE;
|
|
aState.mReflowStatus = NS_FRAME_NOT_COMPLETE;
|
|
}
|
|
else {
|
|
// Note: line-break-after a block is a nop
|
|
|
|
// Try to place the child block.
|
|
// Don't force the block to fit if we have positive clearance, because
|
|
// pushing it to the next page would give it more room.
|
|
// Don't force the block to fit if it's impacted by a float. If it is,
|
|
// then pushing it to the next page would give it more room. Note that
|
|
// isImpacted doesn't include impact from the block's own floats.
|
|
PRBool forceFit = aState.IsAdjacentWithTop() && clearance <= 0 &&
|
|
!isImpacted;
|
|
nsCollapsingMargin collapsedBottomMargin;
|
|
nsRect combinedArea(0,0,0,0);
|
|
*aKeepReflowGoing = brc.PlaceBlock(blockHtmlRS, forceFit, aLine.get(),
|
|
computedOffsets, collapsedBottomMargin,
|
|
aLine->mBounds, combinedArea, frameReflowStatus);
|
|
if (aLine->SetCarriedOutBottomMargin(collapsedBottomMargin)) {
|
|
line_iterator nextLine = aLine;
|
|
++nextLine;
|
|
if (nextLine != end_lines()) {
|
|
nextLine->MarkPreviousMarginDirty();
|
|
}
|
|
}
|
|
|
|
if (aState.GetFlag(BRS_SHRINKWRAPWIDTH)) {
|
|
// Mark the line as dirty so once we known the final shrink wrap width
|
|
// we can reflow the block to the correct size
|
|
// XXX We don't always need to do this...
|
|
aLine->MarkDirty();
|
|
aState.SetFlag(BRS_NEEDRESIZEREFLOW, PR_TRUE);
|
|
}
|
|
if (aState.GetFlag(BRS_UNCONSTRAINEDWIDTH) || aState.GetFlag(BRS_SHRINKWRAPWIDTH)) {
|
|
// Add the right margin to the line's bounds. That way it will be
|
|
// taken into account when we compute our shrink wrap size.
|
|
nscoord marginRight = brc.GetMargin().right;
|
|
if (marginRight != NS_UNCONSTRAINEDSIZE) {
|
|
aLine->mBounds.width += marginRight;
|
|
}
|
|
}
|
|
aLine->SetCombinedArea(combinedArea);
|
|
if (*aKeepReflowGoing) {
|
|
// Some of the child block fit
|
|
|
|
// Advance to new Y position
|
|
nscoord newY = aLine->mBounds.YMost();
|
|
aState.mY = newY;
|
|
|
|
// Continue the block frame now if it didn't completely fit in
|
|
// the available space.
|
|
if (NS_FRAME_IS_NOT_COMPLETE(frameReflowStatus)) {
|
|
PRBool madeContinuation;
|
|
rv = CreateContinuationFor(aState, nsnull, frame, madeContinuation);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
|
|
nsIFrame* nextFrame = frame->GetNextInFlow();
|
|
|
|
// Push continuation to a new line, but only if we actually made one.
|
|
if (madeContinuation) {
|
|
nsLineBox* line = aState.NewLineBox(nextFrame, 1, PR_TRUE);
|
|
if (nsnull == line) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
mLines.after_insert(aLine, line);
|
|
}
|
|
|
|
// Advance to next line since some of the block fit. That way
|
|
// only the following lines will be pushed.
|
|
PushLines(aState, aLine);
|
|
aState.mReflowStatus = NS_FRAME_NOT_COMPLETE;
|
|
// If we need to reflow the continuation of the block child,
|
|
// then we'd better reflow our continuation
|
|
if (frameReflowStatus & NS_FRAME_REFLOW_NEXTINFLOW) {
|
|
aState.mReflowStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
|
|
// We also need to make that continuation's line dirty so
|
|
// it gets reflowed when we reflow our next in flow. The
|
|
// nif's line must always be either a line of the nif's
|
|
// parent block (only if we didn't make a continuation) or
|
|
// else one of our own overflow lines. In the latter case
|
|
// the line is already marked dirty, so just handle the
|
|
// first case.
|
|
if (!madeContinuation) {
|
|
nsBlockFrame* nifBlock = NS_STATIC_CAST(nsBlockFrame*, nextFrame->GetParent());
|
|
NS_ASSERTION(nifBlock->GetType() == nsLayoutAtoms::blockFrame
|
|
|| nifBlock->GetType() == nsLayoutAtoms::areaFrame,
|
|
"A block's child's next in flow's parent must be a block!");
|
|
for (line_iterator line = nifBlock->begin_lines(),
|
|
line_end = nifBlock->end_lines(); line != line_end; ++line) {
|
|
if (line->Contains(nextFrame)) {
|
|
line->MarkDirty();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
*aKeepReflowGoing = PR_FALSE;
|
|
|
|
// The bottom margin for a block is only applied on the last
|
|
// flow block. Since we just continued the child block frame,
|
|
// we know that line->mFirstChild is not the last flow block
|
|
// therefore zero out the running margin value.
|
|
#ifdef NOISY_VERTICAL_MARGINS
|
|
ListTag(stdout);
|
|
printf(": reflow incomplete, frame=");
|
|
nsFrame::ListTag(stdout, frame);
|
|
printf(" prevBottomMargin=%d, setting to zero\n",
|
|
aState.mPrevBottomMargin);
|
|
#endif
|
|
aState.mPrevBottomMargin.Zero();
|
|
}
|
|
else {
|
|
#ifdef NOISY_VERTICAL_MARGINS
|
|
ListTag(stdout);
|
|
printf(": reflow complete for ");
|
|
nsFrame::ListTag(stdout, frame);
|
|
printf(" prevBottomMargin=%d collapsedBottomMargin=%d\n",
|
|
aState.mPrevBottomMargin, collapsedBottomMargin.get());
|
|
#endif
|
|
aState.mPrevBottomMargin = collapsedBottomMargin;
|
|
}
|
|
#ifdef NOISY_VERTICAL_MARGINS
|
|
ListTag(stdout);
|
|
printf(": frame=");
|
|
nsFrame::ListTag(stdout, frame);
|
|
printf(" carriedOutBottomMargin=%d collapsedBottomMargin=%d => %d\n",
|
|
brc.GetCarriedOutBottomMargin(), collapsedBottomMargin.get(),
|
|
aState.mPrevBottomMargin);
|
|
#endif
|
|
|
|
// Post-process the "line"
|
|
nscoord maxElementWidth = 0;
|
|
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTWIDTH)) {
|
|
maxElementWidth = brc.GetMaxElementWidth();
|
|
}
|
|
// If we asked the block to update its maximum width, then record the
|
|
// updated value in the line, and update the current maximum width
|
|
if (aState.GetFlag(BRS_COMPUTEMAXWIDTH)) {
|
|
// The maximum width in the line box includes the left
|
|
// border/padding of this block, but not the right.
|
|
aLine->mMaximumWidth = brc.GetMaximumWidth() + availSpace.x;
|
|
aState.UpdateMaximumWidth(aLine->mMaximumWidth);
|
|
}
|
|
PostPlaceLine(aState, aLine, maxElementWidth);
|
|
|
|
// If the block frame that we just reflowed happens to be our
|
|
// first block, then its computed ascent is ours
|
|
if (frame == GetTopBlockChild(aState.mPresContext)) {
|
|
const nsHTMLReflowMetrics& metrics = brc.GetMetrics();
|
|
mAscent = metrics.ascent;
|
|
}
|
|
|
|
// Place the "marker" (bullet) frame.
|
|
//
|
|
// According to the CSS2 spec, section 12.6.1, the "marker" box
|
|
// participates in the height calculation of the list-item box's
|
|
// first line box.
|
|
//
|
|
// There are exactly two places a bullet can be placed: near the
|
|
// first or second line. Its only placed on the second line in a
|
|
// rare case: an empty first line followed by a second line that
|
|
// contains a block (example: <LI>\n<P>... ). This is where
|
|
// the second case can happen.
|
|
if (mBullet && HaveOutsideBullet() &&
|
|
((aLine == mLines.front()) ||
|
|
((0 == mLines.front()->mBounds.height) &&
|
|
(aLine == begin_lines().next())))) {
|
|
// Reflow the bullet
|
|
nsHTMLReflowMetrics metrics(nsnull);
|
|
ReflowBullet(aState, metrics);
|
|
|
|
// Doing the alignment using |mAscent| will also cater for bullets
|
|
// that are placed next to a child block (bug 92896)
|
|
// (Note that mAscent should be set by now, otherwise why would
|
|
// we be placing the bullet yet?)
|
|
|
|
// Tall bullets won't look particularly nice here...
|
|
nsRect bbox = mBullet->GetRect();
|
|
nscoord bulletTopMargin = applyTopMargin
|
|
? collapsedBottomMargin.get()
|
|
: 0;
|
|
bbox.y = aState.BorderPadding().top + mAscent -
|
|
metrics.ascent + bulletTopMargin;
|
|
mBullet->SetRect(bbox);
|
|
}
|
|
}
|
|
else {
|
|
// None of the block fits. Determine the correct reflow status.
|
|
if (aLine == mLines.front()) {
|
|
// If it's our very first line then we need to be pushed to
|
|
// our parents next-in-flow. Therefore, return break-before
|
|
// status for our reflow status.
|
|
aState.mReflowStatus = NS_INLINE_LINE_BREAK_BEFORE();
|
|
}
|
|
else {
|
|
// Push the line that didn't fit and any lines that follow it
|
|
// to our next-in-flow.
|
|
UndoSplitPlaceholders(aState, lastPlaceholder);
|
|
PushLines(aState, aLine.prev());
|
|
aState.mReflowStatus = NS_FRAME_NOT_COMPLETE;
|
|
}
|
|
}
|
|
}
|
|
break; // out of the reflow retry loop
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
VerifyLines(PR_TRUE);
|
|
#endif
|
|
return rv;
|
|
}
|
|
|
|
#define LINE_REFLOW_OK 0
|
|
#define LINE_REFLOW_STOP 1
|
|
#define LINE_REFLOW_REDO 2
|
|
// a frame was complete, but truncated and not at the top of a page
|
|
#define LINE_REFLOW_TRUNCATED 3
|
|
|
|
nsresult
|
|
nsBlockFrame::ReflowInlineFrames(nsBlockReflowState& aState,
|
|
line_iterator aLine,
|
|
PRBool aTryPull,
|
|
PRBool* aKeepReflowGoing,
|
|
PRBool aDamageDirtyArea,
|
|
PRBool aUpdateMaximumWidth)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
*aKeepReflowGoing = PR_TRUE;
|
|
|
|
#ifdef DEBUG
|
|
PRInt32 spins = 0;
|
|
#endif
|
|
PRUint8 lineReflowStatus = LINE_REFLOW_REDO;
|
|
PRBool didRedo = PR_FALSE;
|
|
do {
|
|
// Once upon a time we allocated the first 30 nsLineLayout objects
|
|
// on the stack, and then we switched to the heap. At that time
|
|
// these objects were large (1100 bytes on a 32 bit system).
|
|
// Then the nsLineLayout object was shrunk to 156 bytes by
|
|
// removing some internal buffers. Given that it is so much
|
|
// smaller, the complexity of 2 different ways of allocating
|
|
// no longer makes sense. Now we always allocate on the stack
|
|
|
|
nsLineLayout lineLayout(aState.mPresContext,
|
|
aState.mReflowState.mSpaceManager,
|
|
&aState.mReflowState,
|
|
aState.GetFlag(BRS_COMPUTEMAXELEMENTWIDTH));
|
|
lineLayout.Init(&aState, aState.mMinLineHeight, aState.mLineNumber);
|
|
rv = DoReflowInlineFrames(aState, lineLayout, aLine,
|
|
aKeepReflowGoing, &lineReflowStatus,
|
|
aUpdateMaximumWidth, aDamageDirtyArea, aTryPull);
|
|
lineLayout.EndLineReflow();
|
|
|
|
if (LINE_REFLOW_REDO == lineReflowStatus) {
|
|
didRedo = PR_TRUE;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
spins++;
|
|
if (1000 == spins) {
|
|
ListTag(stdout);
|
|
printf(": yikes! spinning on a line over 1000 times!\n");
|
|
NS_ABORT();
|
|
}
|
|
#endif
|
|
|
|
} while (NS_SUCCEEDED(rv) && LINE_REFLOW_REDO == lineReflowStatus);
|
|
|
|
// If we did at least one REDO, then the line did not fit next to some float.
|
|
// Mark it as impacted by a float, even if it no longer is next to a float.
|
|
if (didRedo) {
|
|
aLine->SetLineIsImpactedByFloat(PR_TRUE);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
// If at least one float on the line was complete, not at the top of
|
|
// page, but was truncated, then restore the overflow floats to what
|
|
// they were before and push the line. The floats that will be removed
|
|
// from the list aren't yet known by the block's next in flow.
|
|
void
|
|
nsBlockFrame::PushTruncatedPlaceholderLine(nsBlockReflowState& aState,
|
|
line_iterator aLine,
|
|
nsIFrame* aLastPlaceholder,
|
|
PRBool& aKeepReflowGoing)
|
|
{
|
|
UndoSplitPlaceholders(aState, aLastPlaceholder);
|
|
|
|
line_iterator prevLine = aLine;
|
|
--prevLine;
|
|
PushLines(aState, prevLine);
|
|
aKeepReflowGoing = PR_FALSE;
|
|
aState.mReflowStatus = NS_FRAME_NOT_COMPLETE;
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::DoReflowInlineFrames(nsBlockReflowState& aState,
|
|
nsLineLayout& aLineLayout,
|
|
line_iterator aLine,
|
|
PRBool* aKeepReflowGoing,
|
|
PRUint8* aLineReflowStatus,
|
|
PRBool aUpdateMaximumWidth,
|
|
PRBool aDamageDirtyArea,
|
|
PRBool aAllowPullUp)
|
|
{
|
|
// Forget all of the floats on the line
|
|
aLine->FreeFloats(aState.mFloatCacheFreeList);
|
|
aState.mFloatCombinedArea.SetRect(0, 0, 0, 0);
|
|
|
|
// Setup initial coordinate system for reflowing the inline frames
|
|
// into. Apply a previous block frame's bottom margin first.
|
|
if (ShouldApplyTopMargin(aState, aLine)) {
|
|
aState.mY += aState.mPrevBottomMargin.get();
|
|
}
|
|
aState.GetAvailableSpace();
|
|
PRBool impactedByFloats = aState.IsImpactedByFloat() ? PR_TRUE : PR_FALSE;
|
|
aLine->SetLineIsImpactedByFloat(impactedByFloats);
|
|
#ifdef REALLY_NOISY_REFLOW
|
|
printf("nsBlockFrame::DoReflowInlineFrames %p impacted = %d\n",
|
|
this, impactedByFloats);
|
|
#endif
|
|
|
|
const nsMargin& borderPadding = aState.BorderPadding();
|
|
nscoord x = aState.mAvailSpaceRect.x + borderPadding.left;
|
|
nscoord availWidth = aState.mAvailSpaceRect.width;
|
|
nscoord availHeight;
|
|
if (aState.GetFlag(BRS_UNCONSTRAINEDHEIGHT)) {
|
|
availHeight = NS_UNCONSTRAINEDSIZE;
|
|
}
|
|
else {
|
|
/* XXX get the height right! */
|
|
availHeight = aState.mAvailSpaceRect.height;
|
|
}
|
|
if (aUpdateMaximumWidth) {
|
|
availWidth = NS_UNCONSTRAINEDSIZE;
|
|
}
|
|
aLineLayout.BeginLineReflow(x, aState.mY,
|
|
availWidth, availHeight,
|
|
impactedByFloats,
|
|
PR_FALSE /*XXX isTopOfPage*/);
|
|
|
|
// XXX Unfortunately we need to know this before reflowing the first
|
|
// inline frame in the line. FIX ME.
|
|
if ((0 == aLineLayout.GetLineNumber()) &&
|
|
(NS_BLOCK_HAS_FIRST_LETTER_STYLE & mState)) {
|
|
aLineLayout.SetFirstLetterStyleOK(PR_TRUE);
|
|
}
|
|
|
|
// keep track of the last overflow float in case we need to undo any new additions
|
|
nsIFrame* lastPlaceholder = aState.mOverflowPlaceholders.LastChild();
|
|
|
|
// Reflow the frames that are already on the line first
|
|
nsresult rv = NS_OK;
|
|
PRUint8 lineReflowStatus = LINE_REFLOW_OK;
|
|
PRInt32 i;
|
|
nsIFrame* frame = aLine->mFirstChild;
|
|
aLine->SetHasPercentageChild(PR_FALSE); // To be set by ReflowInlineFrame below
|
|
// Determine whether this is a line of placeholders for out-of-flow
|
|
// continuations
|
|
PRBool isContinuingPlaceholders = PR_FALSE;
|
|
|
|
// need to repeatedly call GetChildCount here, because the child
|
|
// count can change during the loop!
|
|
for (i = 0; i < aLine->GetChildCount(); i++) {
|
|
if (IsContinuationPlaceholder(frame)) {
|
|
isContinuingPlaceholders = PR_TRUE;
|
|
}
|
|
rv = ReflowInlineFrame(aState, aLineLayout, aLine, frame,
|
|
&lineReflowStatus);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
if (LINE_REFLOW_OK != lineReflowStatus) {
|
|
// It is possible that one or more of next lines are empty
|
|
// (because of DeleteNextInFlowChild). If so, delete them now
|
|
// in case we are finished.
|
|
++aLine;
|
|
while ((aLine != end_lines()) && (0 == aLine->GetChildCount())) {
|
|
// XXX Is this still necessary now that DeleteNextInFlowChild
|
|
// uses DoRemoveFrame?
|
|
nsLineBox *toremove = aLine;
|
|
aLine = mLines.erase(aLine);
|
|
NS_ASSERTION(nsnull == toremove->mFirstChild, "bad empty line");
|
|
aState.FreeLineBox(toremove);
|
|
}
|
|
--aLine;
|
|
|
|
if (LINE_REFLOW_TRUNCATED == lineReflowStatus) {
|
|
// Don't push any lines if we just want to calculate the maximum width
|
|
if (!aUpdateMaximumWidth) {
|
|
// Push the line with the truncated float
|
|
PushTruncatedPlaceholderLine(aState, aLine, lastPlaceholder, *aKeepReflowGoing);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
frame = frame->GetNextSibling();
|
|
}
|
|
|
|
// Don't pull up new frames into lines with continuation placeholders
|
|
if (!isContinuingPlaceholders && aAllowPullUp) {
|
|
// Pull frames and reflow them until we can't
|
|
while (LINE_REFLOW_OK == lineReflowStatus) {
|
|
rv = PullFrame(aState, aLine, aDamageDirtyArea, frame);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
if (nsnull == frame) {
|
|
break;
|
|
}
|
|
|
|
while (LINE_REFLOW_OK == lineReflowStatus) {
|
|
PRInt32 oldCount = aLine->GetChildCount();
|
|
rv = ReflowInlineFrame(aState, aLineLayout, aLine, frame,
|
|
&lineReflowStatus);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
if (aLine->GetChildCount() != oldCount) {
|
|
// We just created a continuation for aFrame AND its going
|
|
// to end up on this line (e.g. :first-letter
|
|
// situation). Therefore we have to loop here before trying
|
|
// to pull another frame.
|
|
frame = frame->GetNextSibling();
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (LINE_REFLOW_REDO == lineReflowStatus) {
|
|
// This happens only when we have a line that is impacted by
|
|
// floats and the first element in the line doesn't fit with
|
|
// the floats.
|
|
//
|
|
// What we do is to advance past the first float we find and
|
|
// then reflow the line all over again.
|
|
NS_ASSERTION(aState.IsImpactedByFloat(),
|
|
"redo line on totally empty line");
|
|
NS_ASSERTION(NS_UNCONSTRAINEDSIZE != aState.mAvailSpaceRect.height,
|
|
"unconstrained height on totally empty line");
|
|
|
|
|
|
if (aState.mAvailSpaceRect.height > 0) {
|
|
aState.mY += aState.mAvailSpaceRect.height;
|
|
} else {
|
|
NS_ASSERTION(NS_UNCONSTRAINEDSIZE != aState.mReflowState.availableHeight,
|
|
"We shouldn't be running out of height here");
|
|
if (NS_UNCONSTRAINEDSIZE == aState.mReflowState.availableHeight) {
|
|
// just move it down a bit to try to get out of this mess
|
|
aState.mY += 1;
|
|
} else {
|
|
// There's nowhere to retry placing the line. Just treat it as if
|
|
// we placed the float but it was truncated so we need this line
|
|
// to go to the next page/column.
|
|
lineReflowStatus = LINE_REFLOW_TRUNCATED;
|
|
// Don't push any lines if we just want to calculate the maximum width
|
|
if (!aUpdateMaximumWidth) {
|
|
// Push the line that didn't fit
|
|
PushTruncatedPlaceholderLine(aState, aLine, lastPlaceholder, *aKeepReflowGoing);
|
|
}
|
|
}
|
|
}
|
|
|
|
// We don't want to advance by the bottom margin anymore (we did it
|
|
// once at the beginning of this function, which will just be called
|
|
// again), and we certainly don't want to go back if it's negative
|
|
// (infinite loop, bug 153429).
|
|
aState.mPrevBottomMargin.Zero();
|
|
|
|
// XXX: a small optimization can be done here when paginating:
|
|
// if the new Y coordinate is past the end of the block then
|
|
// push the line and return now instead of later on after we are
|
|
// past the float.
|
|
}
|
|
else if (LINE_REFLOW_TRUNCATED != lineReflowStatus) {
|
|
// If we are propagating out a break-before status then there is
|
|
// no point in placing the line.
|
|
if (!NS_INLINE_IS_BREAK_BEFORE(aState.mReflowStatus)) {
|
|
if (PlaceLine(aState, aLineLayout, aLine, aKeepReflowGoing, aUpdateMaximumWidth)) {
|
|
UndoSplitPlaceholders(aState, lastPlaceholder); // undo since we pushed the current line
|
|
}
|
|
}
|
|
}
|
|
*aLineReflowStatus = lineReflowStatus;
|
|
|
|
return rv;
|
|
}
|
|
|
|
/**
|
|
* Reflow an inline frame. The reflow status is mapped from the frames
|
|
* reflow status to the lines reflow status (not to our reflow status).
|
|
* The line reflow status is simple: PR_TRUE means keep placing frames
|
|
* on the line; PR_FALSE means don't (the line is done). If the line
|
|
* has some sort of breaking affect then aLine's break-type will be set
|
|
* to something other than NS_STYLE_CLEAR_NONE.
|
|
*/
|
|
nsresult
|
|
nsBlockFrame::ReflowInlineFrame(nsBlockReflowState& aState,
|
|
nsLineLayout& aLineLayout,
|
|
line_iterator aLine,
|
|
nsIFrame* aFrame,
|
|
PRUint8* aLineReflowStatus)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aFrame);
|
|
|
|
*aLineReflowStatus = LINE_REFLOW_OK;
|
|
|
|
// If it's currently ok to be reflowing in first-letter style then
|
|
// we must be about to reflow a frame that has first-letter style.
|
|
PRBool reflowingFirstLetter = aLineLayout.GetFirstLetterStyleOK();
|
|
#ifdef NOISY_FIRST_LETTER
|
|
ListTag(stdout);
|
|
printf(": reflowing ");
|
|
nsFrame::ListTag(stdout, aFrame);
|
|
printf(" reflowingFirstLetter=%s\n", reflowingFirstLetter ? "on" : "off");
|
|
#endif
|
|
|
|
// Remember if we have a percentage aware child on this line
|
|
if (IsPercentageAwareChild(aFrame)) {
|
|
aLine->SetHasPercentageChild(PR_TRUE);
|
|
}
|
|
|
|
// Reflow the inline frame
|
|
nsReflowStatus frameReflowStatus;
|
|
PRBool pushedFrame;
|
|
nsresult rv = aLineLayout.ReflowFrame(aFrame, frameReflowStatus,
|
|
nsnull, pushedFrame);
|
|
|
|
if (frameReflowStatus & NS_FRAME_REFLOW_NEXTINFLOW) {
|
|
// we need to ensure that the frame's nextinflow gets reflowed.
|
|
aState.mReflowStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
|
|
nsBlockFrame* ourNext = NS_STATIC_CAST(nsBlockFrame*, GetNextInFlow());
|
|
if (ourNext && aFrame->GetNextInFlow()) {
|
|
line_iterator f = ourNext->FindLineFor(aFrame->GetNextInFlow());
|
|
if (f != ourNext->end_lines()) {
|
|
f->MarkDirty();
|
|
}
|
|
}
|
|
}
|
|
|
|
// If this is an incremental reflow, prune the child from the path
|
|
// so we don't incrementally reflow it again.
|
|
// XXX note that we don't currently have any incremental reflows
|
|
// that trace a path through an inline frame (thanks to reflow roots
|
|
// dealing with text inputs), but we may need to deal with this
|
|
// again, someday.
|
|
if (aState.mReflowState.path)
|
|
aState.mReflowState.path->RemoveChild(aFrame);
|
|
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
#ifdef REALLY_NOISY_REFLOW_CHILD
|
|
nsFrame::ListTag(stdout, aFrame);
|
|
printf(": status=%x\n", frameReflowStatus);
|
|
#endif
|
|
|
|
#if defined(REFLOW_STATUS_COVERAGE)
|
|
RecordReflowStatus(PR_FALSE, frameReflowStatus);
|
|
#endif
|
|
|
|
// Send post-reflow notification
|
|
aState.mPrevChild = aFrame;
|
|
|
|
/* XXX
|
|
This is where we need to add logic to handle some odd behavior.
|
|
For one thing, we should usually place at least one thing next
|
|
to a left float, even when that float takes up all the width on a line.
|
|
see bug 22496
|
|
*/
|
|
|
|
// Process the child frames reflow status. There are 5 cases:
|
|
// complete, not-complete, break-before, break-after-complete,
|
|
// break-after-not-complete. There are two situations: we are a
|
|
// block or we are an inline. This makes a total of 10 cases
|
|
// (fortunately, there is some overlap).
|
|
aLine->SetBreakTypeAfter(NS_STYLE_CLEAR_NONE);
|
|
if (NS_INLINE_IS_BREAK(frameReflowStatus) ||
|
|
(NS_STYLE_CLEAR_NONE != aState.mFloatBreakType)) {
|
|
// Always abort the line reflow (because a line break is the
|
|
// minimal amount of break we do).
|
|
*aLineReflowStatus = LINE_REFLOW_STOP;
|
|
|
|
// XXX what should aLine's break-type be set to in all these cases?
|
|
PRUint8 breakType = NS_INLINE_GET_BREAK_TYPE(frameReflowStatus);
|
|
NS_ASSERTION((NS_STYLE_CLEAR_NONE != breakType) ||
|
|
(NS_STYLE_CLEAR_NONE != aState.mFloatBreakType), "bad break type");
|
|
NS_ASSERTION(NS_STYLE_CLEAR_PAGE != breakType, "no page breaks yet");
|
|
|
|
if (NS_INLINE_IS_BREAK_BEFORE(frameReflowStatus)) {
|
|
// Break-before cases.
|
|
if (aFrame == aLine->mFirstChild) {
|
|
// If we break before the first frame on the line then we must
|
|
// be trying to place content where theres no room (e.g. on a
|
|
// line with wide floats). Inform the caller to reflow the
|
|
// line after skipping past a float.
|
|
*aLineReflowStatus = LINE_REFLOW_REDO;
|
|
}
|
|
else {
|
|
// It's not the first child on this line so go ahead and split
|
|
// the line. We will see the frame again on the next-line.
|
|
rv = SplitLine(aState, aLineLayout, aLine, aFrame);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
// If we're splitting the line because the frame didn't fit and it
|
|
// was pushed, then mark the line as having word wrapped. We need to
|
|
// know that if we're shrink wrapping our width
|
|
if (pushedFrame) {
|
|
aLine->SetLineWrapped(PR_TRUE);
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
// If a float split and its prev-in-flow was followed by a <BR>, then combine
|
|
// the <BR>'s break type with the inline's break type (the inline will be the very
|
|
// next frame after the split float).
|
|
if (NS_STYLE_CLEAR_NONE != aState.mFloatBreakType) {
|
|
breakType = nsLayoutUtils::CombineBreakType(breakType,
|
|
aState.mFloatBreakType);
|
|
aState.mFloatBreakType = NS_STYLE_CLEAR_NONE;
|
|
}
|
|
// Break-after cases
|
|
if (breakType == NS_STYLE_CLEAR_LINE) {
|
|
if (!aLineLayout.GetLineEndsInBR()) {
|
|
breakType = NS_STYLE_CLEAR_NONE;
|
|
}
|
|
}
|
|
aLine->SetBreakTypeAfter(breakType);
|
|
if (NS_FRAME_IS_NOT_COMPLETE(frameReflowStatus)) {
|
|
// Create a continuation for the incomplete frame. Note that the
|
|
// frame may already have a continuation.
|
|
PRBool madeContinuation;
|
|
rv = CreateContinuationFor(aState, aLine, aFrame, madeContinuation);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
if (!aLineLayout.GetLineEndsInBR()) {
|
|
// Remember that the line has wrapped
|
|
aLine->SetLineWrapped(PR_TRUE);
|
|
}
|
|
}
|
|
|
|
// Split line, but after the frame just reflowed
|
|
rv = SplitLine(aState, aLineLayout, aLine, aFrame->GetNextSibling());
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
if (NS_FRAME_IS_NOT_COMPLETE(frameReflowStatus)) {
|
|
// Mark next line dirty in case SplitLine didn't end up
|
|
// pushing any frames.
|
|
nsLineList_iterator next = aLine.next();
|
|
if (next != end_lines() && !next->IsBlock()) {
|
|
next->MarkDirty();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else if (NS_FRAME_IS_NOT_COMPLETE(frameReflowStatus)) {
|
|
// Frame is not-complete, no special breaking status
|
|
|
|
nsIAtom* frameType = aFrame->GetType();
|
|
|
|
// Create a continuation for the incomplete frame. Note that the
|
|
// frame may already have a continuation.
|
|
PRBool madeContinuation;
|
|
rv = (nsLayoutAtoms::placeholderFrame == frameType)
|
|
? SplitPlaceholder(aState, aFrame)
|
|
: CreateContinuationFor(aState, aLine, aFrame, madeContinuation);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
|
|
// Remember that the line has wrapped
|
|
if (!aLineLayout.GetLineEndsInBR()) {
|
|
aLine->SetLineWrapped(PR_TRUE);
|
|
}
|
|
|
|
// If we are reflowing the first letter frame or a placeholder then
|
|
// don't split the line and don't stop the line reflow...
|
|
PRBool splitLine = !reflowingFirstLetter &&
|
|
nsLayoutAtoms::placeholderFrame != frameType;
|
|
if (reflowingFirstLetter) {
|
|
if ((nsLayoutAtoms::inlineFrame == frameType) ||
|
|
(nsLayoutAtoms::lineFrame == frameType)) {
|
|
splitLine = PR_TRUE;
|
|
}
|
|
}
|
|
|
|
if (splitLine) {
|
|
// Split line after the current frame
|
|
*aLineReflowStatus = LINE_REFLOW_STOP;
|
|
rv = SplitLine(aState, aLineLayout, aLine, aFrame->GetNextSibling());
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
// Mark next line dirty in case SplitLine didn't end up
|
|
// pushing any frames.
|
|
nsLineList_iterator next = aLine.next();
|
|
if (next != end_lines() && !next->IsBlock()) {
|
|
next->MarkDirty();
|
|
}
|
|
}
|
|
}
|
|
else if (NS_FRAME_IS_TRUNCATED(frameReflowStatus)) {
|
|
// if the frame is a placeholder and was complete but truncated (and not at the top
|
|
// of page), the entire line will be pushed to give it another chance to not truncate.
|
|
if (nsLayoutAtoms::placeholderFrame == aFrame->GetType()) {
|
|
*aLineReflowStatus = LINE_REFLOW_TRUNCATED;
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
/**
|
|
* Create a continuation, if necessary, for aFrame. Place it in aLine
|
|
* if aLine is not null. Set aMadeNewFrame to PR_TRUE if a new frame is created.
|
|
*/
|
|
nsresult
|
|
nsBlockFrame::CreateContinuationFor(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
nsIFrame* aFrame,
|
|
PRBool& aMadeNewFrame)
|
|
{
|
|
aMadeNewFrame = PR_FALSE;
|
|
nsresult rv;
|
|
nsIFrame* nextInFlow;
|
|
rv = CreateNextInFlow(aState.mPresContext, this, aFrame, nextInFlow);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
if (nsnull != nextInFlow) {
|
|
aMadeNewFrame = PR_TRUE;
|
|
if (aLine) {
|
|
aLine->SetChildCount(aLine->GetChildCount() + 1);
|
|
}
|
|
}
|
|
#ifdef DEBUG
|
|
VerifyLines(PR_FALSE);
|
|
#endif
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::SplitPlaceholder(nsBlockReflowState& aState,
|
|
nsIFrame* aPlaceholder)
|
|
{
|
|
nsIFrame* nextInFlow;
|
|
nsresult rv = CreateNextInFlow(aState.mPresContext, this, aPlaceholder, nextInFlow);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
|
|
if (!nextInFlow) {
|
|
// Next in flow was not created because it already exists.
|
|
return NS_OK;
|
|
}
|
|
|
|
// put the sibling list back to what it was before the continuation was created
|
|
nsIFrame *contFrame = aPlaceholder->GetNextSibling();
|
|
nsIFrame *next = contFrame->GetNextSibling();
|
|
aPlaceholder->SetNextSibling(next);
|
|
contFrame->SetNextSibling(nsnull);
|
|
|
|
NS_ASSERTION(IsContinuationPlaceholder(contFrame),
|
|
"Didn't create the right kind of frame");
|
|
|
|
// The new out of flow frame does not get put anywhere; the out-of-flows
|
|
// for placeholders in mOverflowPlaceholders are not kept in any child list
|
|
aState.mOverflowPlaceholders.AppendFrame(this, contFrame);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::SplitLine(nsBlockReflowState& aState,
|
|
nsLineLayout& aLineLayout,
|
|
line_iterator aLine,
|
|
nsIFrame* aFrame)
|
|
{
|
|
NS_ABORT_IF_FALSE(aLine->IsInline(), "illegal SplitLine on block line");
|
|
|
|
PRInt32 pushCount = aLine->GetChildCount() - aLineLayout.GetCurrentSpanCount();
|
|
NS_ABORT_IF_FALSE(pushCount >= 0, "bad push count");
|
|
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
nsFrame::IndentBy(stdout, gNoiseIndent);
|
|
printf("split line: from line=%p pushCount=%d aFrame=",
|
|
NS_STATIC_CAST(void*, aLine.get()), pushCount);
|
|
if (aFrame) {
|
|
nsFrame::ListTag(stdout, aFrame);
|
|
}
|
|
else {
|
|
printf("(null)");
|
|
}
|
|
printf("\n");
|
|
if (gReallyNoisyReflow) {
|
|
aLine->List(aState.mPresContext, stdout, gNoiseIndent+1);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (0 != pushCount) {
|
|
NS_ABORT_IF_FALSE(aLine->GetChildCount() > pushCount, "bad push");
|
|
NS_ABORT_IF_FALSE(nsnull != aFrame, "whoops");
|
|
NS_ASSERTION(nsFrameList(aFrame).GetLength() >= pushCount,
|
|
"Not enough frames to push");
|
|
|
|
// Put frames being split out into their own line
|
|
nsLineBox* newLine = aState.NewLineBox(aFrame, pushCount, PR_FALSE);
|
|
if (!newLine) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
mLines.after_insert(aLine, newLine);
|
|
aLine->SetChildCount(aLine->GetChildCount() - pushCount);
|
|
#ifdef DEBUG
|
|
if (gReallyNoisyReflow) {
|
|
newLine->List(aState.mPresContext, stdout, gNoiseIndent+1);
|
|
}
|
|
#endif
|
|
|
|
// Let line layout know that some frames are no longer part of its
|
|
// state.
|
|
aLineLayout.SplitLineTo(aLine->GetChildCount());
|
|
#ifdef DEBUG
|
|
VerifyLines(PR_TRUE);
|
|
#endif
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
PRBool
|
|
nsBlockFrame::ShouldJustifyLine(nsBlockReflowState& aState,
|
|
line_iterator aLine)
|
|
{
|
|
while (++aLine != end_lines()) {
|
|
// There is another line
|
|
if (0 != aLine->GetChildCount()) {
|
|
// If the next line is a block line then we must not justify
|
|
// this line because it means that this line is the last in a
|
|
// group of inline lines.
|
|
return !aLine->IsBlock();
|
|
}
|
|
// The next line is empty, try the next one
|
|
}
|
|
|
|
// XXX Not sure about this part
|
|
// Try our next-in-flows lines to answer the question
|
|
nsBlockFrame* nextInFlow = (nsBlockFrame*) mNextInFlow;
|
|
while (nsnull != nextInFlow) {
|
|
for (line_iterator line = nextInFlow->begin_lines(),
|
|
line_end = nextInFlow->end_lines();
|
|
line != line_end;
|
|
++line)
|
|
{
|
|
if (0 != line->GetChildCount())
|
|
return !line->IsBlock();
|
|
}
|
|
nextInFlow = (nsBlockFrame*) nextInFlow->mNextInFlow;
|
|
}
|
|
|
|
// This is the last line - so don't allow justification
|
|
return PR_FALSE;
|
|
}
|
|
|
|
PRBool
|
|
nsBlockFrame::PlaceLine(nsBlockReflowState& aState,
|
|
nsLineLayout& aLineLayout,
|
|
line_iterator aLine,
|
|
PRBool* aKeepReflowGoing,
|
|
PRBool aUpdateMaximumWidth)
|
|
{
|
|
// Trim extra white-space from the line before placing the frames
|
|
aLineLayout.TrimTrailingWhiteSpace();
|
|
|
|
// Vertically align the frames on this line.
|
|
//
|
|
// According to the CSS2 spec, section 12.6.1, the "marker" box
|
|
// participates in the height calculation of the list-item box's
|
|
// first line box.
|
|
//
|
|
// There are exactly two places a bullet can be placed: near the
|
|
// first or second line. Its only placed on the second line in a
|
|
// rare case: an empty first line followed by a second line that
|
|
// contains a block (example: <LI>\n<P>... ).
|
|
//
|
|
// For this code, only the first case is possible because this
|
|
// method is used for placing a line of inline frames. If the rare
|
|
// case is happening then the worst that will happen is that the
|
|
// bullet frame will be reflowed twice.
|
|
PRBool addedBullet = PR_FALSE;
|
|
if (mBullet && HaveOutsideBullet() && (aLine == mLines.front()) &&
|
|
(!aLineLayout.IsZeroHeight() || (aLine == mLines.back()))) {
|
|
nsHTMLReflowMetrics metrics(nsnull);
|
|
ReflowBullet(aState, metrics);
|
|
aLineLayout.AddBulletFrame(mBullet, metrics);
|
|
addedBullet = PR_TRUE;
|
|
}
|
|
nscoord maxElementWidth;
|
|
aLineLayout.VerticalAlignLine(aLine, &maxElementWidth);
|
|
// Our ascent is the ascent of our first line (but if this line is all
|
|
// whitespace we'll correct things in |ReflowBlockFrame|).
|
|
if (aLine == mLines.front()) {
|
|
mAscent = aLine->mBounds.y + aLine->GetAscent();
|
|
}
|
|
|
|
// See if we're shrink wrapping the width
|
|
if (aState.GetFlag(BRS_SHRINKWRAPWIDTH)) {
|
|
// XXXldb Do we really still want to do this?
|
|
// When determining the line's width we also need to include any
|
|
// right floats that impact us. This represents the shrink wrap
|
|
// width of the line
|
|
if (aState.IsImpactedByFloat() && !aLine->IsLineWrapped()) {
|
|
NS_ASSERTION(aState.mContentArea.width >= aState.mAvailSpaceRect.XMost(), "bad state");
|
|
aLine->mBounds.width += aState.mContentArea.width - aState.mAvailSpaceRect.XMost();
|
|
}
|
|
}
|
|
#ifdef DEBUG
|
|
{
|
|
static nscoord lastHeight = 0;
|
|
if (CRAZY_HEIGHT(aLine->mBounds.y)) {
|
|
lastHeight = aLine->mBounds.y;
|
|
if (abs(aLine->mBounds.y - lastHeight) > CRAZY_H/10) {
|
|
nsFrame::ListTag(stdout);
|
|
printf(": line=%p y=%d line.bounds.height=%d\n",
|
|
NS_STATIC_CAST(void*, aLine.get()),
|
|
aLine->mBounds.y, aLine->mBounds.height);
|
|
}
|
|
}
|
|
else {
|
|
lastHeight = 0;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// Only block frames horizontally align their children because
|
|
// inline frames "shrink-wrap" around their children (therefore
|
|
// there is no extra horizontal space).
|
|
const nsStyleText* styleText = GetStyleText();
|
|
PRBool allowJustify = NS_STYLE_TEXT_ALIGN_JUSTIFY == styleText->mTextAlign &&
|
|
!aLineLayout.GetLineEndsInBR() &&
|
|
ShouldJustifyLine(aState, aLine);
|
|
PRBool successful = aLineLayout.HorizontalAlignFrames(aLine->mBounds,
|
|
allowJustify, aState.GetFlag(BRS_SHRINKWRAPWIDTH));
|
|
// XXX: not only bidi: right alignment can be broken after
|
|
// RelativePositionFrames!!!
|
|
// XXXldb Is something here considering relatively positioned frames at
|
|
// other than their original positions?
|
|
if (!successful) {
|
|
// Mark the line dirty and then later once we've determined the width
|
|
// we can do the horizontal alignment
|
|
aLine->MarkDirty();
|
|
aState.SetFlag(BRS_NEEDRESIZEREFLOW, PR_TRUE);
|
|
}
|
|
#ifdef IBMBIDI
|
|
// XXXldb Why don't we do this earlier?
|
|
else {
|
|
if (aState.mPresContext->BidiEnabled()) {
|
|
if (!aState.mPresContext->IsVisualMode()) {
|
|
nsBidiPresUtils* bidiUtils = aState.mPresContext->GetBidiUtils();
|
|
|
|
if (bidiUtils && bidiUtils->IsSuccessful() ) {
|
|
nsIFrame* nextInFlow = (aLine.next() != end_lines())
|
|
? aLine.next()->mFirstChild : nsnull;
|
|
|
|
bidiUtils->ReorderFrames(aState.mPresContext,
|
|
aState.mReflowState.rendContext,
|
|
aLine->mFirstChild, nextInFlow,
|
|
aLine->GetChildCount() );
|
|
} // bidiUtils
|
|
} // not visual mode
|
|
} // bidi enabled
|
|
} // successful
|
|
#endif // IBMBIDI
|
|
|
|
nsRect combinedArea;
|
|
aLineLayout.RelativePositionFrames(combinedArea); // XXXldb This returned width as -15, 2001-06-12, Bugzilla
|
|
aLine->SetCombinedArea(combinedArea);
|
|
if (addedBullet) {
|
|
aLineLayout.RemoveBulletFrame(mBullet);
|
|
}
|
|
|
|
// Inline lines do not have margins themselves; however they are
|
|
// impacted by prior block margins. If this line ends up having some
|
|
// height then we zero out the previous bottom margin value that was
|
|
// already applied to the line's starting Y coordinate. Otherwise we
|
|
// leave it be so that the previous blocks bottom margin can be
|
|
// collapsed with a block that follows.
|
|
nscoord newY;
|
|
|
|
if (!aLine->CachedIsEmpty()) {
|
|
// This line has some height. Therefore the application of the
|
|
// previous-bottom-margin should stick.
|
|
aState.mPrevBottomMargin.Zero();
|
|
newY = aLine->mBounds.YMost();
|
|
}
|
|
else {
|
|
// Don't let the previous-bottom-margin value affect the newY
|
|
// coordinate (it was applied in ReflowInlineFrames speculatively)
|
|
// since the line is empty.
|
|
// We already called |ShouldApplyTopMargin|, and if we applied it
|
|
// then BRS_APPLYTOPMARGIN is set.
|
|
nscoord dy = aState.GetFlag(BRS_APPLYTOPMARGIN)
|
|
? -aState.mPrevBottomMargin.get() : 0;
|
|
newY = aState.mY + dy;
|
|
aLine->SlideBy(dy); // XXXldb Do we really want to do this?
|
|
// keep our ascent in sync
|
|
// XXXldb If it's empty, shouldn't the next line control the ascent?
|
|
if (mLines.front() == aLine) {
|
|
mAscent += dy;
|
|
}
|
|
}
|
|
|
|
// See if the line fit. If it doesn't we need to push it. Our first
|
|
// line will always fit.
|
|
|
|
// If we're just updating the maximum width then we don't care if it
|
|
// fits; we'll assume it does, so that the maximum width will get
|
|
// updated below. The line will be reflowed again and pushed then
|
|
// if necessary.
|
|
if (mLines.front() != aLine &&
|
|
newY > aState.mBottomEdge &&
|
|
aState.mBottomEdge != NS_UNCONSTRAINEDSIZE &&
|
|
!aUpdateMaximumWidth) {
|
|
// Push this line and all of it's children and anything else that
|
|
// follows to our next-in-flow
|
|
NS_ASSERTION((aState.mCurrentLine == aLine), "oops");
|
|
PushLines(aState, aLine.prev());
|
|
|
|
// Stop reflow and whack the reflow status if reflow hasn't
|
|
// already been stopped.
|
|
if (*aKeepReflowGoing) {
|
|
aState.mReflowStatus |= NS_FRAME_NOT_COMPLETE;
|
|
*aKeepReflowGoing = PR_FALSE;
|
|
}
|
|
return PR_TRUE;
|
|
}
|
|
|
|
// May be needed below
|
|
PRBool wasAdjacentWIthTop = aState.IsAdjacentWithTop();
|
|
|
|
aState.mY = newY;
|
|
|
|
// If we're reflowing the line just to incrementally update the
|
|
// maximum width, then don't post-place the line. It's doing work we
|
|
// don't need, and it will update things like aState.mKidXMost that
|
|
// we don't want updated...
|
|
if (aUpdateMaximumWidth) {
|
|
// However, we do need to update the max-element-width if requested
|
|
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTWIDTH)) {
|
|
aState.UpdateMaxElementWidth(maxElementWidth);
|
|
// We also cache the max element width in the line. This is needed for
|
|
// incremental reflow
|
|
aLine->mMaxElementWidth = maxElementWidth;
|
|
#ifdef DEBUG
|
|
if (gNoisyMaxElementWidth) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
printf ("nsBlockFrame::PlaceLine: %p setting MEW for line %p to %d\n",
|
|
NS_STATIC_CAST(void*, this), NS_STATIC_CAST(void*, aLine.get()),
|
|
maxElementWidth);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
} else {
|
|
PostPlaceLine(aState, aLine, maxElementWidth);
|
|
}
|
|
|
|
// Add the already placed current-line floats to the line
|
|
aLine->AppendFloats(aState.mCurrentLineFloats);
|
|
|
|
// Any below current line floats to place?
|
|
if (aState.mBelowCurrentLineFloats.NotEmpty()) {
|
|
// Reflow the below-current-line floats, then add them to the
|
|
// lines float list if there aren't any truncated floats.
|
|
if (aState.PlaceBelowCurrentLineFloats(aState.mBelowCurrentLineFloats,
|
|
wasAdjacentWIthTop)) {
|
|
aLine->AppendFloats(aState.mBelowCurrentLineFloats);
|
|
}
|
|
else {
|
|
// At least one float is truncated, so fix up any placeholders that got split and
|
|
// push the line. XXX It may be better to put the float on the next line, but this
|
|
// is not common enough to justify the complexity. Or maybe it is now...
|
|
|
|
// If we just want to calculate the maximum width, then don't push the line.
|
|
// We'll reflow it again and then it will get pushed if necessary.
|
|
if (!aUpdateMaximumWidth) {
|
|
nsIFrame* lastPlaceholder = aState.mOverflowPlaceholders.LastChild();
|
|
PushTruncatedPlaceholderLine(aState, aLine, lastPlaceholder, *aKeepReflowGoing);
|
|
}
|
|
}
|
|
}
|
|
|
|
// When a line has floats, factor them into the combined-area
|
|
// computations.
|
|
if (aLine->HasFloats()) {
|
|
// Combine the float combined area (stored in aState) and the
|
|
// value computed by the line layout code.
|
|
nsRect lineCombinedArea(aLine->GetCombinedArea());
|
|
#ifdef NOISY_COMBINED_AREA
|
|
ListTag(stdout);
|
|
printf(": lineCA=%d,%d,%d,%d floatCA=%d,%d,%d,%d\n",
|
|
lineCombinedArea.x, lineCombinedArea.y,
|
|
lineCombinedArea.width, lineCombinedArea.height,
|
|
aState.mFloatCombinedArea.x, aState.mFloatCombinedArea.y,
|
|
aState.mFloatCombinedArea.width,
|
|
aState.mFloatCombinedArea.height);
|
|
#endif
|
|
lineCombinedArea.UnionRect(aState.mFloatCombinedArea, lineCombinedArea);
|
|
|
|
aLine->SetCombinedArea(lineCombinedArea);
|
|
#ifdef NOISY_COMBINED_AREA
|
|
printf(" ==> final lineCA=%d,%d,%d,%d\n",
|
|
lineCombinedArea.x, lineCombinedArea.y,
|
|
lineCombinedArea.width, lineCombinedArea.height);
|
|
#endif
|
|
}
|
|
|
|
// Apply break-after clearing if necessary
|
|
// This must stay in sync with |ReflowDirtyLines|.
|
|
if (aLine->HasFloatBreakAfter()) {
|
|
aState.mY = aState.ClearFloats(aState.mY, aLine->GetBreakTypeAfter());
|
|
}
|
|
|
|
return PR_FALSE;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::PostPlaceLine(nsBlockReflowState& aState,
|
|
nsLineBox* aLine,
|
|
nscoord aMaxElementWidth)
|
|
{
|
|
// Update max-element-width
|
|
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTWIDTH)) {
|
|
aState.UpdateMaxElementWidth(aMaxElementWidth);
|
|
// We also cache the max element width in the line. This is needed for
|
|
// incremental reflow
|
|
aLine->mMaxElementWidth = aMaxElementWidth;
|
|
#ifdef DEBUG
|
|
if (gNoisyMaxElementWidth) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
printf ("nsBlockFrame::PostPlaceLine: %p setting line %p MEW %d\n",
|
|
NS_STATIC_CAST(void*, this), NS_STATIC_CAST(void*, aLine),
|
|
aMaxElementWidth);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
// If this is an unconstrained reflow, then cache the line width in the
|
|
// line. We'll need this during incremental reflow if we're asked to
|
|
// calculate the maximum width
|
|
if (aState.GetFlag(BRS_UNCONSTRAINEDWIDTH)) {
|
|
#ifdef NOISY_MAXIMUM_WIDTH
|
|
printf("nsBlockFrame::PostPlaceLine during UC Reflow of block %p line %p caching max width %d\n",
|
|
NS_STATIC_CAST(void*, this), NS_STATIC_CAST(void*, aLine),
|
|
aLine->mBounds.XMost());
|
|
#endif
|
|
aLine->mMaximumWidth = aLine->mBounds.XMost();
|
|
}
|
|
|
|
// Update xmost
|
|
nscoord xmost = aLine->mBounds.XMost();
|
|
|
|
#ifdef DEBUG
|
|
if (CRAZY_WIDTH(xmost)) {
|
|
ListTag(stdout);
|
|
printf(": line=%p xmost=%d\n", NS_STATIC_CAST(void*, aLine), xmost);
|
|
}
|
|
#endif
|
|
if (xmost > aState.mKidXMost) {
|
|
aState.mKidXMost = xmost;
|
|
#ifdef NOISY_KIDXMOST
|
|
printf("%p PostPlaceLine aState.mKidXMost=%d\n", this, aState.mKidXMost);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::PushLines(nsBlockReflowState& aState,
|
|
nsLineList::iterator aLineBefore)
|
|
{
|
|
nsLineList::iterator overBegin(aLineBefore.next());
|
|
|
|
// PushTruncatedPlaceholderLine sometimes pushes the first line. Ugh.
|
|
PRBool firstLine = overBegin == begin_lines();
|
|
|
|
if (overBegin != end_lines()) {
|
|
// Remove floats in the lines from mFloats
|
|
nsFrameList floats;
|
|
nsIFrame* tail = nsnull;
|
|
CollectFloats(overBegin->mFirstChild, floats, &tail, PR_FALSE, PR_TRUE);
|
|
|
|
if (floats.NotEmpty()) {
|
|
// Push the floats onto the front of the overflow out-of-flows list
|
|
nsFrameList oofs = GetOverflowOutOfFlows();
|
|
if (oofs.NotEmpty()) {
|
|
floats.InsertFrames(nsnull, tail, oofs.FirstChild());
|
|
}
|
|
SetOverflowOutOfFlows(floats);
|
|
}
|
|
|
|
// overflow lines can already exist in some cases, in particular,
|
|
// when shrinkwrapping and we discover that the shrinkwap causes
|
|
// the height of some child block to grow which creates additional
|
|
// overflowing content. In such cases we must prepend the new
|
|
// overflow to the existing overflow.
|
|
nsLineList* overflowLines = RemoveOverflowLines();
|
|
if (!overflowLines) {
|
|
// XXXldb use presshell arena!
|
|
overflowLines = new nsLineList();
|
|
}
|
|
if (overflowLines) {
|
|
if (!overflowLines->empty()) {
|
|
mLines.back()->LastChild()->SetNextSibling(overflowLines->front()->mFirstChild);
|
|
}
|
|
overflowLines->splice(overflowLines->begin(), mLines, overBegin,
|
|
end_lines());
|
|
NS_ASSERTION(!overflowLines->empty(), "should not be empty");
|
|
// this takes ownership but it won't delete it immediately so we
|
|
// can keep using it.
|
|
SetOverflowLines(overflowLines);
|
|
|
|
// Mark all the overflow lines dirty so that they get reflowed when
|
|
// they are pulled up by our next-in-flow.
|
|
|
|
// XXXldb Can this get called O(N) times making the whole thing O(N^2)?
|
|
for (line_iterator line = overflowLines->begin(),
|
|
line_end = overflowLines->end();
|
|
line != line_end;
|
|
++line)
|
|
{
|
|
line->MarkDirty();
|
|
line->MarkPreviousMarginDirty();
|
|
line->mBounds.SetRect(0, 0, 0, 0);
|
|
if (line->HasFloats()) {
|
|
line->FreeFloats(aState.mFloatCacheFreeList);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Break frame sibling list
|
|
if (!firstLine)
|
|
aLineBefore->LastChild()->SetNextSibling(nsnull);
|
|
|
|
#ifdef DEBUG
|
|
VerifyOverflowSituation();
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* Call this when a frame will be pulled from the block's
|
|
* next-in-flow into this frame. If it's a continuation placeholder,
|
|
* it should not be here so we push it into our overflow placeholders
|
|
* list. To avoid creating holes (e.g., the following block doesn't
|
|
* have a placeholder but the block after it does) we also need to
|
|
* pull all the following placeholders and put them in our overflow
|
|
* placeholders list too.
|
|
*
|
|
* If it's a first-in-flow placeholder, or it contains one, then we
|
|
* need to do this to the continuation placeholders.
|
|
*
|
|
* We return PR_TRUE if we removed the frame and it cannot be used.
|
|
* If we return PR_FALSE then the frame *must* be pulled immediately.
|
|
*/
|
|
PRBool
|
|
nsBlockFrame::HandleOverflowPlaceholdersForPulledFrame(
|
|
nsBlockReflowState& aState, nsIFrame* aFrame)
|
|
{
|
|
if (nsLayoutAtoms::placeholderFrame != aFrame->GetType()) {
|
|
// Descend into children that are not float containing blocks.
|
|
// We should encounter only first-in-flow placeholders, so the
|
|
// frame subtree rooted at aFrame should not change.
|
|
if (!aFrame->IsFloatContainingBlock()) {
|
|
for (nsIFrame* f = aFrame->GetFirstChild(nsnull); f; f = f->GetNextSibling()) {
|
|
#ifdef DEBUG
|
|
PRBool changed =
|
|
#endif
|
|
HandleOverflowPlaceholdersForPulledFrame(aState, f);
|
|
NS_ASSERTION(!changed, "Shouldn't find any continuation placeholders inside inlines");
|
|
}
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
PRBool taken = PR_TRUE;
|
|
nsIFrame* frame = aFrame;
|
|
if (!aFrame->GetPrevInFlow()) {
|
|
// First in flow frame. We only want to deal with its
|
|
// next in flows, if there are any.
|
|
taken = PR_FALSE;
|
|
frame = frame->GetNextInFlow();
|
|
if (!frame)
|
|
return PR_FALSE;
|
|
}
|
|
|
|
nsBlockFrame* parent = NS_STATIC_CAST(nsBlockFrame*, frame->GetParent());
|
|
// Remove aFrame and all its next in flows from their parents, but
|
|
// don't destroy the frames.
|
|
#ifdef DEBUG
|
|
nsresult rv =
|
|
#endif
|
|
parent->DoRemoveFrame(frame, PR_FALSE);
|
|
NS_ASSERTION(NS_SUCCEEDED(rv), "frame should be in parent's lists");
|
|
|
|
nsIFrame* lastOverflowPlace = aState.mOverflowPlaceholders.LastChild();
|
|
while (frame) {
|
|
NS_ASSERTION(IsContinuationPlaceholder(frame),
|
|
"Should only be dealing with continuation placeholders here");
|
|
|
|
parent = NS_STATIC_CAST(nsBlockFrame*, frame->GetParent());
|
|
ReparentFrame(frame, parent, this);
|
|
|
|
// continuation placeholders are always direct children of a block
|
|
nsIFrame* outOfFlow = nsPlaceholderFrame::GetRealFrameForPlaceholder(frame);
|
|
|
|
if (!parent->mFloats.RemoveFrame(outOfFlow)) {
|
|
nsAutoOOFFrameList oofs(parent);
|
|
#ifdef DEBUG
|
|
PRBool found =
|
|
#endif
|
|
oofs.mList.RemoveFrame(outOfFlow);
|
|
NS_ASSERTION(found, "Must have the out of flow in some child list");
|
|
}
|
|
ReparentFrame(outOfFlow, parent, this);
|
|
|
|
aState.mOverflowPlaceholders.InsertFrames(nsnull, lastOverflowPlace, frame);
|
|
// outOfFlow isn't inserted anywhere yet. Eventually the overflow
|
|
// placeholders get put into the overflow lines, and at the same time we
|
|
// insert the placeholders' out of flows into the overflow out-of-flows
|
|
// list.
|
|
lastOverflowPlace = frame;
|
|
|
|
frame = frame->GetNextInFlow();
|
|
}
|
|
|
|
return taken;
|
|
}
|
|
|
|
/**
|
|
* Call this when a line will be pulled from the block's
|
|
* next-in-flow's line.
|
|
*
|
|
* @return PR_TRUE we consumed the entire line, delete it and try again
|
|
*/
|
|
PRBool
|
|
nsBlockFrame::HandleOverflowPlaceholdersOnPulledLine(
|
|
nsBlockReflowState& aState, nsLineBox* aLine)
|
|
{
|
|
// First, see if it's a line of continuation placeholders. If it
|
|
// is, remove one and retry.
|
|
if (aLine->mFirstChild && IsContinuationPlaceholder(aLine->mFirstChild)) {
|
|
PRBool taken =
|
|
HandleOverflowPlaceholdersForPulledFrame(aState, aLine->mFirstChild);
|
|
NS_ASSERTION(taken, "We must have removed that frame");
|
|
return PR_TRUE;
|
|
}
|
|
|
|
// OK, it's a normal line. Scan it for floats with continuations that
|
|
// need to be taken care of. We won't need to change the line.
|
|
PRInt32 n = aLine->GetChildCount();
|
|
for (nsIFrame* f = aLine->mFirstChild; n > 0; f = f->GetNextSibling(), --n) {
|
|
#ifdef DEBUG
|
|
PRBool taken =
|
|
#endif
|
|
HandleOverflowPlaceholdersForPulledFrame(aState, f);
|
|
NS_ASSERTION(!taken, "Shouldn't be any continuation placeholders on this line");
|
|
}
|
|
|
|
return PR_FALSE;
|
|
}
|
|
|
|
// The overflowLines property is stored as a pointer to a line list,
|
|
// which must be deleted. However, the following functions all maintain
|
|
// the invariant that the property is never set if the list is empty.
|
|
|
|
PRBool
|
|
nsBlockFrame::DrainOverflowLines(nsBlockReflowState& aState)
|
|
{
|
|
#ifdef DEBUG
|
|
VerifyOverflowSituation();
|
|
#endif
|
|
nsLineList* overflowLines = nsnull;
|
|
nsLineList* ourOverflowLines = nsnull;
|
|
|
|
// First grab the prev-in-flows overflow lines
|
|
nsBlockFrame* prevBlock = (nsBlockFrame*) mPrevInFlow;
|
|
if (prevBlock) {
|
|
overflowLines = prevBlock->RemoveOverflowLines();
|
|
if (overflowLines) {
|
|
NS_ASSERTION(! overflowLines->empty(),
|
|
"overflow lines should never be set and empty");
|
|
// Make all the frames on the overflow line list mine
|
|
nsIFrame* frame = overflowLines->front()->mFirstChild;
|
|
while (nsnull != frame) {
|
|
ReparentFrame(frame, prevBlock, this);
|
|
|
|
// Get the next frame
|
|
frame = frame->GetNextSibling();
|
|
}
|
|
|
|
// make the overflow out-of-flow frames mine too
|
|
nsAutoOOFFrameList oofs(prevBlock);
|
|
if (oofs.mList.NotEmpty()) {
|
|
for (nsIFrame* f = oofs.mList.FirstChild(); f; f = f->GetNextSibling()) {
|
|
ReparentFrame(f, prevBlock, this);
|
|
}
|
|
mFloats.InsertFrames(nsnull, nsnull, oofs.mList.FirstChild());
|
|
oofs.mList.SetFrames(nsnull);
|
|
}
|
|
}
|
|
|
|
// The lines on the overflow list have already been marked dirty and their
|
|
// previous margins marked dirty also.
|
|
}
|
|
|
|
// Don't need to reparent frames in our own overflow lines/oofs, because they're
|
|
// already ours. But we should put overflow floats back in mFloats.
|
|
ourOverflowLines = RemoveOverflowLines();
|
|
if (ourOverflowLines) {
|
|
nsAutoOOFFrameList oofs(this);
|
|
if (oofs.mList.NotEmpty()) {
|
|
// The overflow floats go after our regular floats
|
|
mFloats.AppendFrames(nsnull, oofs.mList.FirstChild());
|
|
oofs.mList.SetFrames(nsnull);
|
|
}
|
|
}
|
|
|
|
if (!overflowLines && !ourOverflowLines) {
|
|
// nothing to do; always the case for non-constrained-height reflows
|
|
return PR_FALSE;
|
|
}
|
|
|
|
NS_ASSERTION(aState.mOverflowPlaceholders.IsEmpty(),
|
|
"Should have no overflow placeholders yet");
|
|
|
|
// HANDLING CONTINUATION PLACEHOLDERS (floats only at the moment, because
|
|
// abs-pos frames don't have continuations)
|
|
//
|
|
// All continuation placeholders need to be moved to the front of
|
|
// our line list. We also need to maintain the invariant that at
|
|
// most one frame for a given piece of content is in our normal
|
|
// child list, by pushing all but the first placeholder to our
|
|
// overflow placeholders list.
|
|
//
|
|
// One problem we have to deal with is that some of these
|
|
// continuation placeholders may have been donated to us by a
|
|
// descendant block that was complete. We need to push them down to
|
|
// a lower block if possible.
|
|
//
|
|
// We keep the lists ordered so that prev in flows come before their
|
|
// next in flows. We do not worry about properly ordering the
|
|
// placeholders for different content relative to each other until
|
|
// the end. Then we sort them.
|
|
//
|
|
// When we're shuffling placeholders we also need to shuffle their out of
|
|
// flows to match. As we put placeholders into keepPlaceholders, we unhook
|
|
// their floats from mFloats. Later we put the floats back based on the
|
|
// order of the placeholders.
|
|
nsIFrame* lastOP = nsnull;
|
|
nsFrameList keepPlaceholders;
|
|
nsFrameList keepOutOfFlows;
|
|
nsIFrame* lastKP = nsnull;
|
|
nsIFrame* lastKOOF = nsnull;
|
|
nsLineList* lineLists[3] = { overflowLines, &mLines, ourOverflowLines };
|
|
static const PRPackedBool searchFirstLinesOnly[3] = { PR_FALSE, PR_TRUE, PR_FALSE };
|
|
for (PRInt32 i = 0; i < 3; ++i) {
|
|
nsLineList* ll = lineLists[i];
|
|
if (ll && !ll->empty()) {
|
|
line_iterator iter = ll->begin();
|
|
line_iterator iter_end = ll->end();
|
|
nsIFrame* lastFrame = nsnull;
|
|
while (iter != iter_end) {
|
|
PRUint32 n = iter->GetChildCount();
|
|
if (n == 0 || !IsContinuationPlaceholder(iter->mFirstChild)) {
|
|
if (lastFrame) {
|
|
lastFrame->SetNextSibling(iter->mFirstChild);
|
|
}
|
|
if (searchFirstLinesOnly[i]) {
|
|
break;
|
|
}
|
|
lastFrame = iter->LastChild();
|
|
++iter;
|
|
} else {
|
|
nsLineBox* line = iter;
|
|
iter = ll->erase(iter);
|
|
nsIFrame* next;
|
|
for (nsPlaceholderFrame* f = NS_STATIC_CAST(nsPlaceholderFrame*, line->mFirstChild);
|
|
n > 0; --n, f = NS_STATIC_CAST(nsPlaceholderFrame*, next)) {
|
|
NS_ASSERTION(IsContinuationPlaceholder(f),
|
|
"Line frames should all be continuation placeholders");
|
|
next = f->GetNextSibling();
|
|
nsIFrame* fpif = f->GetPrevInFlow();
|
|
nsIFrame* oof = f->GetOutOfFlowFrame();
|
|
|
|
// Take this out of mFloats for now. We may put it back later in
|
|
// this function
|
|
#ifdef DEBUG
|
|
PRBool found =
|
|
#endif
|
|
mFloats.RemoveFrame(oof);
|
|
NS_ASSERTION(found, "Float should have been put in our mFloats list");
|
|
|
|
PRBool isAncestor = nsLayoutUtils::IsProperAncestorFrame(this, fpif);
|
|
if (isAncestor) {
|
|
// oops. we already have a prev-in-flow for this
|
|
// placeholder. We have to move this frame out of here. We
|
|
// can put it in our overflow placeholders.
|
|
aState.mOverflowPlaceholders.InsertFrame(nsnull, lastOP, f);
|
|
// Let oof dangle for now, because placeholders in
|
|
// mOverflowPlaceholders do not keep their floats in any child list
|
|
lastOP = f;
|
|
} else {
|
|
if (fpif->GetParent() == prevBlock) {
|
|
keepPlaceholders.InsertFrame(nsnull, lastKP, f);
|
|
keepOutOfFlows.InsertFrame(nsnull, lastKOOF, oof);
|
|
lastKP = f;
|
|
lastKOOF = oof;
|
|
} else {
|
|
// Ok, now we're in the tough situation where some child
|
|
// of prevBlock was complete and pushed its overflow
|
|
// placeholders up to prevBlock's overflow. We might be
|
|
// able to find a more appropriate parent for f somewhere
|
|
// down in our descendants.
|
|
NS_ASSERTION(nsLayoutUtils::IsProperAncestorFrame(prevBlock, fpif),
|
|
"bad prev-in-flow ancestor chain");
|
|
// Find the first ancestor of f's prev-in-flow that has a next in flow
|
|
// that can contain the float.
|
|
// That next in flow should become f's parent.
|
|
nsIFrame* fpAncestor;
|
|
for (fpAncestor = fpif->GetParent();
|
|
!fpAncestor->GetNextInFlow() || !fpAncestor->IsFloatContainingBlock();
|
|
fpAncestor = fpAncestor->GetParent())
|
|
;
|
|
if (fpAncestor == prevBlock) {
|
|
// We're still the best parent.
|
|
keepPlaceholders.InsertFrame(nsnull, lastKP, f);
|
|
keepOutOfFlows.InsertFrame(nsnull, lastKOOF, oof);
|
|
lastKP = f;
|
|
lastKOOF = oof;
|
|
} else {
|
|
// Just put it at the front of
|
|
// fpAncestor->GetNextInFlow()'s lines.
|
|
nsLineBox* newLine = aState.NewLineBox(f, 1, PR_FALSE);
|
|
if (newLine) {
|
|
nsBlockFrame* target =
|
|
NS_STATIC_CAST(nsBlockFrame*, fpAncestor->GetNextInFlow());
|
|
if (!target->mLines.empty()) {
|
|
f->SetNextSibling(target->mLines.front()->mFirstChild);
|
|
} else {
|
|
f->SetNextSibling(nsnull);
|
|
}
|
|
target->mLines.push_front(newLine);
|
|
ReparentFrame(f, this, target);
|
|
|
|
target->mFloats.InsertFrame(nsnull, nsnull, oof);
|
|
ReparentFrame(oof, this, target);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
aState.FreeLineBox(line);
|
|
}
|
|
}
|
|
if (lastFrame) {
|
|
lastFrame->SetNextSibling(nsnull);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Now join the line lists into mLines
|
|
if (overflowLines) {
|
|
if (!overflowLines->empty()) {
|
|
// Join the line lists
|
|
if (! mLines.empty())
|
|
{
|
|
// Remember to recompute the margins on the first line. This will
|
|
// also recompute the correct deltaY if necessary.
|
|
mLines.front()->MarkPreviousMarginDirty();
|
|
// Join the sibling lists together
|
|
nsIFrame* lastFrame = overflowLines->back()->LastChild();
|
|
lastFrame->SetNextSibling(mLines.front()->mFirstChild);
|
|
}
|
|
// Place overflow lines at the front of our line list
|
|
mLines.splice(mLines.begin(), *overflowLines);
|
|
NS_ASSERTION(overflowLines->empty(), "splice should empty list");
|
|
}
|
|
delete overflowLines;
|
|
}
|
|
if (ourOverflowLines) {
|
|
if (!ourOverflowLines->empty()) {
|
|
if (!mLines.empty()) {
|
|
mLines.back()->LastChild()->
|
|
SetNextSibling(ourOverflowLines->front()->mFirstChild);
|
|
}
|
|
// append the overflow to mLines
|
|
mLines.splice(mLines.end(), *ourOverflowLines);
|
|
}
|
|
delete ourOverflowLines;
|
|
}
|
|
|
|
// store the placeholders that we're keeping in our frame list
|
|
if (keepPlaceholders.NotEmpty()) {
|
|
keepPlaceholders.SortByContentOrder();
|
|
nsLineBox* newLine = aState.NewLineBox(keepPlaceholders.FirstChild(),
|
|
keepPlaceholders.GetLength(), PR_FALSE);
|
|
if (newLine) {
|
|
if (!mLines.empty()) {
|
|
keepPlaceholders.LastChild()->SetNextSibling(mLines.front()->mFirstChild);
|
|
}
|
|
mLines.push_front(newLine);
|
|
}
|
|
|
|
// Put the placeholders' out of flows into the float list
|
|
keepOutOfFlows.SortByContentOrder();
|
|
mFloats.InsertFrames(nsnull, nsnull, keepOutOfFlows.FirstChild());
|
|
}
|
|
|
|
return PR_TRUE;
|
|
}
|
|
|
|
nsLineList*
|
|
nsBlockFrame::GetOverflowLines() const
|
|
{
|
|
if (!(GetStateBits() & NS_BLOCK_HAS_OVERFLOW_LINES)) {
|
|
return nsnull;
|
|
}
|
|
nsLineList* lines = NS_STATIC_CAST(nsLineList*,
|
|
GetProperty(nsLayoutAtoms::overflowLinesProperty));
|
|
NS_ASSERTION(lines && !lines->empty(),
|
|
"value should always be stored and non-empty when state set");
|
|
return lines;
|
|
}
|
|
|
|
nsLineList*
|
|
nsBlockFrame::RemoveOverflowLines()
|
|
{
|
|
if (!(GetStateBits() & NS_BLOCK_HAS_OVERFLOW_LINES)) {
|
|
return nsnull;
|
|
}
|
|
nsLineList* lines = NS_STATIC_CAST(nsLineList*,
|
|
UnsetProperty(nsLayoutAtoms::overflowLinesProperty));
|
|
NS_ASSERTION(lines && !lines->empty(),
|
|
"value should always be stored and non-empty when state set");
|
|
RemoveStateBits(NS_BLOCK_HAS_OVERFLOW_LINES);
|
|
return lines;
|
|
}
|
|
|
|
// Destructor function for the overflowLines frame property
|
|
static void
|
|
DestroyOverflowLines(void* aFrame,
|
|
nsIAtom* aPropertyName,
|
|
void* aPropertyValue,
|
|
void* aDtorData)
|
|
{
|
|
if (aPropertyValue) {
|
|
nsLineList* lines = NS_STATIC_CAST(nsLineList*, aPropertyValue);
|
|
nsPresContext *context = NS_STATIC_CAST(nsPresContext*, aDtorData);
|
|
nsLineBox::DeleteLineList(context, *lines);
|
|
delete lines;
|
|
}
|
|
}
|
|
|
|
// This takes ownership of aOverflowLines.
|
|
// XXX We should allocate overflowLines from presShell arena!
|
|
nsresult
|
|
nsBlockFrame::SetOverflowLines(nsLineList* aOverflowLines)
|
|
{
|
|
NS_ASSERTION(aOverflowLines, "null lines");
|
|
NS_ASSERTION(!aOverflowLines->empty(), "empty lines");
|
|
NS_ASSERTION(!(GetStateBits() & NS_BLOCK_HAS_OVERFLOW_LINES),
|
|
"Overwriting existing overflow lines");
|
|
|
|
nsPresContext *presContext = GetPresContext();
|
|
nsresult rv = presContext->PropertyTable()->
|
|
SetProperty(this, nsLayoutAtoms::overflowLinesProperty, aOverflowLines,
|
|
DestroyOverflowLines, presContext);
|
|
// Verify that we didn't overwrite an existing overflow list
|
|
NS_ASSERTION(rv != NS_PROPTABLE_PROP_OVERWRITTEN, "existing overflow list");
|
|
AddStateBits(NS_BLOCK_HAS_OVERFLOW_LINES);
|
|
return rv;
|
|
}
|
|
|
|
nsFrameList
|
|
nsBlockFrame::GetOverflowOutOfFlows() const
|
|
{
|
|
if (!(GetStateBits() & NS_BLOCK_HAS_OVERFLOW_OUT_OF_FLOWS)) {
|
|
return nsFrameList();
|
|
}
|
|
nsIFrame* result = NS_STATIC_CAST(nsIFrame*,
|
|
GetProperty(nsLayoutAtoms::overflowOutOfFlowsProperty));
|
|
NS_ASSERTION(result, "value should always be non-empty when state set");
|
|
return nsFrameList(result);
|
|
}
|
|
|
|
// This takes ownership of the frames
|
|
void
|
|
nsBlockFrame::SetOverflowOutOfFlows(const nsFrameList& aList)
|
|
{
|
|
if (aList.IsEmpty()) {
|
|
if (!(GetStateBits() & NS_BLOCK_HAS_OVERFLOW_OUT_OF_FLOWS)) {
|
|
return;
|
|
}
|
|
nsIFrame* result = NS_STATIC_CAST(nsIFrame*,
|
|
UnsetProperty(nsLayoutAtoms::overflowOutOfFlowsProperty));
|
|
NS_ASSERTION(result, "value should always be non-empty when state set");
|
|
RemoveStateBits(NS_BLOCK_HAS_OVERFLOW_OUT_OF_FLOWS);
|
|
} else {
|
|
SetProperty(nsLayoutAtoms::overflowOutOfFlowsProperty,
|
|
aList.FirstChild(), nsnull);
|
|
AddStateBits(NS_BLOCK_HAS_OVERFLOW_OUT_OF_FLOWS);
|
|
}
|
|
}
|
|
|
|
nsFrameList*
|
|
nsBlockFrame::GetOverflowPlaceholders() const
|
|
{
|
|
if (!(GetStateBits() & NS_BLOCK_HAS_OVERFLOW_PLACEHOLDERS)) {
|
|
return nsnull;
|
|
}
|
|
nsFrameList* result = NS_STATIC_CAST(nsFrameList*,
|
|
GetProperty(nsLayoutAtoms::overflowPlaceholdersProperty));
|
|
NS_ASSERTION(result, "value should always be non-empty when state set");
|
|
return result;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Frame list manipulation routines
|
|
|
|
nsIFrame*
|
|
nsBlockFrame::LastChild()
|
|
{
|
|
if (! mLines.empty()) {
|
|
return mLines.back()->LastChild();
|
|
}
|
|
return nsnull;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::AppendFrames(nsIAtom* aListName,
|
|
nsIFrame* aFrameList)
|
|
{
|
|
if (nsnull == aFrameList) {
|
|
return NS_OK;
|
|
}
|
|
if (mAbsoluteContainer.GetChildListName() == aListName) {
|
|
return mAbsoluteContainer.AppendFrames(this, aListName, aFrameList);
|
|
}
|
|
else if (nsLayoutAtoms::floatList == aListName) {
|
|
mFloats.AppendFrames(nsnull, aFrameList);
|
|
return NS_OK;
|
|
}
|
|
else if (nsnull != aListName) {
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
|
|
// Find the proper last-child for where the append should go
|
|
nsIFrame* lastKid = nsnull;
|
|
nsLineBox* lastLine = mLines.empty() ? nsnull : mLines.back();
|
|
if (lastLine) {
|
|
lastKid = lastLine->LastChild();
|
|
}
|
|
|
|
// Add frames after the last child
|
|
#ifdef NOISY_REFLOW_REASON
|
|
ListTag(stdout);
|
|
printf(": append ");
|
|
nsFrame::ListTag(stdout, aFrameList);
|
|
if (lastKid) {
|
|
printf(" after ");
|
|
nsFrame::ListTag(stdout, lastKid);
|
|
}
|
|
printf("\n");
|
|
#endif
|
|
nsresult rv = AddFrames(aFrameList, lastKid);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
// Ask the parent frame to reflow me.
|
|
ReflowDirtyChild(GetPresContext()->PresShell(), nsnull);
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::InsertFrames(nsIAtom* aListName,
|
|
nsIFrame* aPrevFrame,
|
|
nsIFrame* aFrameList)
|
|
{
|
|
if (mAbsoluteContainer.GetChildListName() == aListName) {
|
|
return mAbsoluteContainer.InsertFrames(this, aListName, aPrevFrame,
|
|
aFrameList);
|
|
}
|
|
else if (nsLayoutAtoms::floatList == aListName) {
|
|
mFloats.InsertFrames(this, aPrevFrame, aFrameList);
|
|
return NS_OK;
|
|
}
|
|
#ifdef IBMBIDI
|
|
else if (nsLayoutAtoms::nextBidi == aListName) {}
|
|
#endif // IBMBIDI
|
|
else if (nsnull != aListName) {
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
|
|
#ifdef NOISY_REFLOW_REASON
|
|
ListTag(stdout);
|
|
printf(": insert ");
|
|
nsFrame::ListTag(stdout, aFrameList);
|
|
if (aPrevFrame) {
|
|
printf(" after ");
|
|
nsFrame::ListTag(stdout, aPrevFrame);
|
|
}
|
|
printf("\n");
|
|
#endif
|
|
nsresult rv = AddFrames(aFrameList, aPrevFrame);
|
|
#ifdef IBMBIDI
|
|
if (aListName != nsLayoutAtoms::nextBidi)
|
|
#endif // IBMBIDI
|
|
if (NS_SUCCEEDED(rv)) {
|
|
// Ask the parent frame to reflow me.
|
|
ReflowDirtyChild(GetPresContext()->PresShell(), nsnull);
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
static PRBool
|
|
ShouldPutNextSiblingOnNewLine(nsIFrame* aLastFrame)
|
|
{
|
|
nsIAtom* type = aLastFrame->GetType();
|
|
if (type == nsLayoutAtoms::brFrame)
|
|
return PR_TRUE;
|
|
if (type == nsLayoutAtoms::placeholderFrame)
|
|
return IsContinuationPlaceholder(aLastFrame);
|
|
return PR_FALSE;
|
|
}
|
|
|
|
nsresult
|
|
nsBlockFrame::AddFrames(nsIFrame* aFrameList,
|
|
nsIFrame* aPrevSibling)
|
|
{
|
|
// Clear our line cursor, since our lines may change.
|
|
ClearLineCursor();
|
|
|
|
if (nsnull == aFrameList) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// If we're inserting at the beginning of our list and we have an
|
|
// inside bullet, insert after that bullet.
|
|
if (!aPrevSibling && mBullet && !HaveOutsideBullet()) {
|
|
NS_ASSERTION(!nsFrameList(aFrameList).ContainsFrame(mBullet),
|
|
"Trying to make mBullet prev sibling to itself");
|
|
aPrevSibling = mBullet;
|
|
}
|
|
|
|
nsIPresShell *presShell = GetPresContext()->PresShell();
|
|
|
|
// Attempt to find the line that contains the previous sibling
|
|
nsLineList::iterator prevSibLine = end_lines();
|
|
PRInt32 prevSiblingIndex = -1;
|
|
if (aPrevSibling) {
|
|
// XXX_perf This is technically O(N^2) in some cases, but by using
|
|
// RFind instead of Find, we make it O(N) in the most common case,
|
|
// which is appending cotent.
|
|
|
|
// Find the line that contains the previous sibling
|
|
if (! nsLineBox::RFindLineContaining(aPrevSibling,
|
|
begin_lines(), prevSibLine,
|
|
&prevSiblingIndex)) {
|
|
// Note: defensive code! RFindLineContaining must not return
|
|
// false in this case, so if it does...
|
|
NS_NOTREACHED("prev sibling not in line list");
|
|
aPrevSibling = nsnull;
|
|
prevSibLine = end_lines();
|
|
}
|
|
}
|
|
|
|
// Find the frame following aPrevSibling so that we can join up the
|
|
// two lists of frames.
|
|
nsIFrame* prevSiblingNextFrame = nsnull;
|
|
if (aPrevSibling) {
|
|
prevSiblingNextFrame = aPrevSibling->GetNextSibling();
|
|
|
|
// Split line containing aPrevSibling in two if the insertion
|
|
// point is somewhere in the middle of the line.
|
|
PRInt32 rem = prevSibLine->GetChildCount() - prevSiblingIndex - 1;
|
|
if (rem) {
|
|
// Split the line in two where the frame(s) are being inserted.
|
|
nsLineBox* line = NS_NewLineBox(presShell, prevSiblingNextFrame, rem, PR_FALSE);
|
|
if (!line) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
mLines.after_insert(prevSibLine, line);
|
|
prevSibLine->SetChildCount(prevSibLine->GetChildCount() - rem);
|
|
prevSibLine->MarkDirty();
|
|
}
|
|
|
|
// Now (partially) join the sibling lists together
|
|
aPrevSibling->SetNextSibling(aFrameList);
|
|
}
|
|
else if (! mLines.empty()) {
|
|
prevSiblingNextFrame = mLines.front()->mFirstChild;
|
|
}
|
|
|
|
// Walk through the new frames being added and update the line data
|
|
// structures to fit.
|
|
nsIFrame* newFrame = aFrameList;
|
|
while (newFrame) {
|
|
PRBool isBlock = nsLineLayout::TreatFrameAsBlock(newFrame);
|
|
|
|
// If the frame is a block frame, or if there is no previous line or if the
|
|
// previous line is a block line or ended with a <br> then make a new line.
|
|
if (isBlock || prevSibLine == end_lines() || prevSibLine->IsBlock() ||
|
|
(aPrevSibling && ShouldPutNextSiblingOnNewLine(aPrevSibling))) {
|
|
// Create a new line for the frame and add its line to the line
|
|
// list.
|
|
nsLineBox* line = NS_NewLineBox(presShell, newFrame, 1, isBlock);
|
|
if (!line) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
if (prevSibLine != end_lines()) {
|
|
// Append new line after prevSibLine
|
|
mLines.after_insert(prevSibLine, line);
|
|
++prevSibLine;
|
|
}
|
|
else {
|
|
// New line is going before the other lines
|
|
mLines.push_front(line);
|
|
prevSibLine = begin_lines();
|
|
}
|
|
}
|
|
else {
|
|
prevSibLine->SetChildCount(prevSibLine->GetChildCount() + 1);
|
|
prevSibLine->MarkDirty();
|
|
}
|
|
|
|
aPrevSibling = newFrame;
|
|
newFrame = newFrame->GetNextSibling();
|
|
}
|
|
if (prevSiblingNextFrame) {
|
|
// Connect the last new frame to the remainder of the sibling list
|
|
aPrevSibling->SetNextSibling(prevSiblingNextFrame);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
VerifyLines(PR_TRUE);
|
|
#endif
|
|
return NS_OK;
|
|
}
|
|
|
|
nsBlockFrame::line_iterator
|
|
nsBlockFrame::RemoveFloat(nsIFrame* aFloat) {
|
|
// Find which line contains the float, so we can update
|
|
// the float cache.
|
|
line_iterator line = begin_lines(), line_end = end_lines();
|
|
for ( ; line != line_end; ++line) {
|
|
if (line->IsInline() && line->RemoveFloat(aFloat)) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Unlink the placeholder *after* we searched the lines, because
|
|
// the line search uses the placeholder relationship.
|
|
nsFrameManager* fm = GetPresContext()->GetPresShell()->FrameManager();
|
|
nsPlaceholderFrame* placeholder = fm->GetPlaceholderFrameFor(aFloat);
|
|
if (placeholder) {
|
|
fm->UnregisterPlaceholderFrame(placeholder);
|
|
placeholder->SetOutOfFlowFrame(nsnull);
|
|
}
|
|
|
|
// Try to destroy if it's in mFloats.
|
|
if (mFloats.DestroyFrame(GetPresContext(), aFloat)) {
|
|
return line;
|
|
}
|
|
|
|
// Try our overflow list
|
|
{
|
|
nsAutoOOFFrameList oofs(this);
|
|
if (oofs.mList.DestroyFrame(GetPresContext(), aFloat)) {
|
|
return line_end;
|
|
}
|
|
}
|
|
|
|
// If this is during reflow, it could be the out-of-flow frame for a
|
|
// placeholder in our block reflow state's mOverflowPlaceholders. But that's
|
|
// OK; it's not part of any child list, so we can just go ahead and delete it.
|
|
aFloat->Destroy(GetPresContext());
|
|
return line_end;
|
|
}
|
|
|
|
static void MarkAllDescendantLinesDirty(nsBlockFrame* aBlock)
|
|
{
|
|
nsLineList::iterator line = aBlock->begin_lines();
|
|
nsLineList::iterator endLine = aBlock->end_lines();
|
|
while (line != endLine) {
|
|
if (line->IsBlock()) {
|
|
nsIFrame* f = line->mFirstChild;
|
|
void* bf;
|
|
if (NS_SUCCEEDED(f->QueryInterface(kBlockFrameCID, &bf))) {
|
|
MarkAllDescendantLinesDirty(NS_STATIC_CAST(nsBlockFrame*, f));
|
|
}
|
|
}
|
|
line->MarkDirty();
|
|
++line;
|
|
}
|
|
}
|
|
|
|
static void MarkSameSpaceManagerLinesDirty(nsBlockFrame* aBlock)
|
|
{
|
|
nsBlockFrame* blockWithSpaceMgr = aBlock;
|
|
while (!(blockWithSpaceMgr->GetStateBits() & NS_BLOCK_SPACE_MGR)) {
|
|
void* bf;
|
|
if (NS_FAILED(blockWithSpaceMgr->GetParent()->
|
|
QueryInterface(kBlockFrameCID, &bf))) {
|
|
break;
|
|
}
|
|
blockWithSpaceMgr = NS_STATIC_CAST(nsBlockFrame*, blockWithSpaceMgr->GetParent());
|
|
}
|
|
|
|
// Mark every line at and below the line where the float was
|
|
// dirty, and mark their lines dirty too. We could probably do
|
|
// something more efficient --- e.g., just dirty the lines that intersect
|
|
// the float vertically.
|
|
MarkAllDescendantLinesDirty(blockWithSpaceMgr);
|
|
}
|
|
|
|
/**
|
|
* Returns PR_TRUE if aFrame is a block that has one or more float children.
|
|
*/
|
|
static PRBool BlockHasAnyFloats(nsIFrame* aFrame)
|
|
{
|
|
void* bf;
|
|
if (NS_FAILED(aFrame->QueryInterface(kBlockFrameCID, &bf)))
|
|
return PR_FALSE;
|
|
nsBlockFrame* block = NS_STATIC_CAST(nsBlockFrame*, aFrame);
|
|
if (block->GetFirstChild(nsLayoutAtoms::floatList))
|
|
return PR_TRUE;
|
|
|
|
nsLineList::iterator line = block->begin_lines();
|
|
nsLineList::iterator endLine = block->end_lines();
|
|
while (line != endLine) {
|
|
if (line->IsBlock() && BlockHasAnyFloats(line->mFirstChild))
|
|
return PR_TRUE;
|
|
++line;
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::RemoveFrame(nsIAtom* aListName,
|
|
nsIFrame* aOldFrame)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
|
|
#ifdef NOISY_REFLOW_REASON
|
|
ListTag(stdout);
|
|
printf(": remove ");
|
|
nsFrame::ListTag(stdout, aOldFrame);
|
|
printf("\n");
|
|
#endif
|
|
|
|
if (nsnull == aListName) {
|
|
PRBool hasFloats = BlockHasAnyFloats(aOldFrame);
|
|
rv = DoRemoveFrame(aOldFrame);
|
|
if (hasFloats) {
|
|
MarkSameSpaceManagerLinesDirty(this);
|
|
}
|
|
}
|
|
else if (mAbsoluteContainer.GetChildListName() == aListName) {
|
|
return mAbsoluteContainer.RemoveFrame(this, aListName, aOldFrame);
|
|
}
|
|
else if (nsLayoutAtoms::floatList == aListName) {
|
|
RemoveFloat(aOldFrame);
|
|
MarkSameSpaceManagerLinesDirty(this);
|
|
}
|
|
#ifdef IBMBIDI
|
|
else if (nsLayoutAtoms::nextBidi == aListName) {
|
|
// Skip the call to |ReflowDirtyChild| below by returning now.
|
|
return DoRemoveFrame(aOldFrame);
|
|
}
|
|
#endif // IBMBIDI
|
|
else {
|
|
rv = NS_ERROR_INVALID_ARG;
|
|
}
|
|
|
|
if (NS_SUCCEEDED(rv)) {
|
|
// Ask the parent frame to reflow me.
|
|
ReflowDirtyChild(GetPresContext()->PresShell(), nsnull);
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::DoRemoveOutOfFlowFrame(nsIFrame* aFrame)
|
|
{
|
|
// First remove aFrame's next in flow
|
|
nsIFrame* nextInFlow = aFrame->GetNextInFlow();
|
|
if (nextInFlow) {
|
|
nsBlockFrame::DoRemoveOutOfFlowFrame(nextInFlow);
|
|
}
|
|
// Now remove aFrame
|
|
const nsStyleDisplay* display = aFrame->GetStyleDisplay();
|
|
|
|
// The containing block is always the parent of aFrame.
|
|
nsBlockFrame* block = (nsBlockFrame*)aFrame->GetParent();
|
|
// Remove aFrame from the appropriate list.
|
|
if (display->IsAbsolutelyPositioned()) {
|
|
block->mAbsoluteContainer.RemoveFrame(block,
|
|
block->mAbsoluteContainer.GetChildListName(),
|
|
aFrame);
|
|
aFrame->Destroy(aFrame->GetPresContext());
|
|
}
|
|
else {
|
|
// This also destroys the frame.
|
|
block->RemoveFloat(aFrame);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This helps us iterate over the list of all normal + overflow lines
|
|
*/
|
|
void
|
|
nsBlockFrame::TryAllLines(nsLineList::iterator* aIterator,
|
|
nsLineList::iterator* aEndIterator,
|
|
PRBool* aInOverflowLines) {
|
|
if (*aIterator == *aEndIterator) {
|
|
if (!*aInOverflowLines) {
|
|
*aInOverflowLines = PR_TRUE;
|
|
// Try the overflow lines
|
|
nsLineList* overflowLines = GetOverflowLines();
|
|
if (overflowLines) {
|
|
*aIterator = overflowLines->begin();
|
|
*aEndIterator = overflowLines->end();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static nsresult RemoveBlockChild(nsIFrame* aFrame, PRBool aDestroyFrames)
|
|
{
|
|
if (!aFrame)
|
|
return NS_OK;
|
|
|
|
nsBlockFrame* nextBlock = NS_STATIC_CAST(nsBlockFrame*, aFrame->GetParent());
|
|
NS_ASSERTION(nextBlock->GetType() == nsLayoutAtoms::blockFrame ||
|
|
nextBlock->GetType() == nsLayoutAtoms::areaFrame,
|
|
"Our child's continuation's parent is not a block?");
|
|
return nextBlock->DoRemoveFrame(aFrame, aDestroyFrames);
|
|
}
|
|
|
|
// This function removes aDeletedFrame and all its continuations. It
|
|
// is optimized for deleting a whole series of frames. The easy
|
|
// implementation would invoke itself recursively on
|
|
// aDeletedFrame->GetNextInFlow, then locate the line containing
|
|
// aDeletedFrame and remove aDeletedFrame from that line. But here we
|
|
// start by locating aDeletedFrame and then scanning from that point
|
|
// on looking for continuations.
|
|
nsresult
|
|
nsBlockFrame::DoRemoveFrame(nsIFrame* aDeletedFrame, PRBool aDestroyFrames)
|
|
{
|
|
// Clear our line cursor, since our lines may change.
|
|
ClearLineCursor();
|
|
|
|
if (aDeletedFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW) {
|
|
NS_ASSERTION(aDestroyFrames, "We can't not destroy out of flows");
|
|
DoRemoveOutOfFlowFrame(aDeletedFrame);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsPresContext* presContext = GetPresContext();
|
|
nsIPresShell* presShell = presContext->PresShell();
|
|
|
|
PRBool isPlaceholder = nsLayoutAtoms::placeholderFrame == aDeletedFrame->GetType();
|
|
if (isPlaceholder) {
|
|
nsFrameList* overflowPlaceholders = GetOverflowPlaceholders();
|
|
if (overflowPlaceholders && overflowPlaceholders->RemoveFrame(aDeletedFrame)) {
|
|
nsIFrame* nif = aDeletedFrame->GetNextInFlow();
|
|
if (aDestroyFrames) {
|
|
aDeletedFrame->Destroy(presContext);
|
|
} else {
|
|
aDeletedFrame->SetNextSibling(nsnull);
|
|
}
|
|
return RemoveBlockChild(nif, aDestroyFrames);
|
|
}
|
|
}
|
|
|
|
// Find the line and the previous sibling that contains
|
|
// deletedFrame; we also find the pointer to the line.
|
|
nsLineList::iterator line = mLines.begin(),
|
|
line_end = mLines.end();
|
|
PRBool searchingOverflowList = PR_FALSE;
|
|
nsIFrame* prevSibling = nsnull;
|
|
// Make sure we look in the overflow lines even if the normal line
|
|
// list is empty
|
|
TryAllLines(&line, &line_end, &searchingOverflowList);
|
|
while (line != line_end) {
|
|
nsIFrame* frame = line->mFirstChild;
|
|
PRInt32 n = line->GetChildCount();
|
|
while (--n >= 0) {
|
|
if (frame == aDeletedFrame) {
|
|
goto found_frame;
|
|
}
|
|
prevSibling = frame;
|
|
frame = frame->GetNextSibling();
|
|
}
|
|
++line;
|
|
TryAllLines(&line, &line_end, &searchingOverflowList);
|
|
}
|
|
found_frame:;
|
|
if (line == line_end) {
|
|
NS_ERROR("can't find deleted frame in lines");
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
if (prevSibling && !prevSibling->GetNextSibling()) {
|
|
// We must have found the first frame in the overflow line list. So
|
|
// there is no prevSibling
|
|
prevSibling = nsnull;
|
|
}
|
|
NS_ASSERTION(!prevSibling || prevSibling->GetNextSibling() == aDeletedFrame, "bad prevSibling");
|
|
|
|
while ((line != line_end) && (nsnull != aDeletedFrame)) {
|
|
NS_ASSERTION(this == aDeletedFrame->GetParent(), "messed up delete code");
|
|
NS_ASSERTION(line->Contains(aDeletedFrame), "frame not in line");
|
|
|
|
// If the frame being deleted is the last one on the line then
|
|
// optimize away the line->Contains(next-in-flow) call below.
|
|
PRBool isLastFrameOnLine = (1 == line->GetChildCount() ||
|
|
line->LastChild() == aDeletedFrame);
|
|
|
|
// Remove aDeletedFrame from the line
|
|
nsIFrame* nextFrame = aDeletedFrame->GetNextSibling();
|
|
if (line->mFirstChild == aDeletedFrame) {
|
|
// We should be setting this to null if aDeletedFrame
|
|
// is the only frame on the line. HOWEVER in that case
|
|
// we will be removing the line anyway, see below.
|
|
line->mFirstChild = nextFrame;
|
|
}
|
|
|
|
// Hmm, this won't do anything if we're removing a frame in the first
|
|
// overflow line... Hopefully doesn't matter
|
|
--line;
|
|
if (line != line_end && !line->IsBlock()) {
|
|
// Since we just removed a frame that follows some inline
|
|
// frames, we need to reflow the previous line.
|
|
line->MarkDirty();
|
|
}
|
|
++line;
|
|
|
|
// Take aDeletedFrame out of the sibling list. Note that
|
|
// prevSibling will only be nsnull when we are deleting the very
|
|
// first frame in the main or overflow list.
|
|
if (prevSibling) {
|
|
prevSibling->SetNextSibling(nextFrame);
|
|
}
|
|
|
|
// Update the child count of the line to be accurate
|
|
PRInt32 lineChildCount = line->GetChildCount();
|
|
lineChildCount--;
|
|
line->SetChildCount(lineChildCount);
|
|
|
|
// Destroy frame; capture its next-in-flow first in case we need
|
|
// to destroy that too.
|
|
nsIFrame* deletedNextInFlow = aDeletedFrame->GetNextInFlow();
|
|
#ifdef NOISY_REMOVE_FRAME
|
|
printf("DoRemoveFrame: %s line=%p frame=",
|
|
searchingOverflowList?"overflow":"normal", line.get());
|
|
nsFrame::ListTag(stdout, aDeletedFrame);
|
|
printf(" prevSibling=%p deletedNextInFlow=%p\n", prevSibling, deletedNextInFlow);
|
|
#endif
|
|
|
|
if (aDestroyFrames) {
|
|
aDeletedFrame->Destroy(presContext);
|
|
} else {
|
|
aDeletedFrame->SetNextSibling(nsnull);
|
|
}
|
|
aDeletedFrame = deletedNextInFlow;
|
|
|
|
PRBool haveAdvancedToNextLine = PR_FALSE;
|
|
// If line is empty, remove it now.
|
|
if (0 == lineChildCount) {
|
|
#ifdef NOISY_REMOVE_FRAME
|
|
printf("DoRemoveFrame: %s line=%p became empty so it will be removed\n",
|
|
searchingOverflowList?"overflow":"normal", line.get());
|
|
#endif
|
|
nsLineBox *cur = line;
|
|
if (!searchingOverflowList) {
|
|
line = mLines.erase(line);
|
|
// Invalidate the space taken up by the line.
|
|
// XXX We need to do this if we're removing a frame as a result of
|
|
// a call to RemoveFrame(), but we may not need to do this in all
|
|
// cases...
|
|
nsRect lineCombinedArea(cur->GetCombinedArea());
|
|
#ifdef NOISY_BLOCK_INVALIDATE
|
|
printf("%p invalidate 10 (%d, %d, %d, %d)\n",
|
|
this, lineCombinedArea.x, lineCombinedArea.y,
|
|
lineCombinedArea.width, lineCombinedArea.height);
|
|
#endif
|
|
Invalidate(lineCombinedArea);
|
|
} else {
|
|
nsLineList* lineList = RemoveOverflowLines();
|
|
line = lineList->erase(line);
|
|
if (!lineList->empty()) {
|
|
SetOverflowLines(lineList);
|
|
}
|
|
}
|
|
cur->Destroy(presShell);
|
|
|
|
// If we're removing a line, ReflowDirtyLines isn't going to
|
|
// know that it needs to slide lines unless something is marked
|
|
// dirty. So mark the previous margin of the next line dirty if
|
|
// there is one.
|
|
if (line != line_end) {
|
|
line->MarkPreviousMarginDirty();
|
|
}
|
|
haveAdvancedToNextLine = PR_TRUE;
|
|
} else {
|
|
// Make the line that just lost a frame dirty, and advance to
|
|
// the next line.
|
|
if (!deletedNextInFlow || isLastFrameOnLine ||
|
|
!line->Contains(deletedNextInFlow)) {
|
|
line->MarkDirty();
|
|
++line;
|
|
haveAdvancedToNextLine = PR_TRUE;
|
|
}
|
|
}
|
|
|
|
if (deletedNextInFlow) {
|
|
// Continuations for placeholder frames don't always appear in
|
|
// consecutive lines. So for placeholders, just continue the slow easy way.
|
|
if (isPlaceholder) {
|
|
return RemoveBlockChild(deletedNextInFlow, aDestroyFrames);
|
|
}
|
|
|
|
// See if we should keep looking in the current flow's line list.
|
|
if (deletedNextInFlow->GetParent() != this) {
|
|
// The deceased frames continuation is not a child of the
|
|
// current block. So break out of the loop so that we advance
|
|
// to the next parent.
|
|
break;
|
|
}
|
|
|
|
// If we advanced to the next line then check if we should switch to the
|
|
// overflow line list.
|
|
if (haveAdvancedToNextLine) {
|
|
if (line != line_end && !searchingOverflowList &&
|
|
!line->Contains(deletedNextInFlow)) {
|
|
// We have advanced to the next *normal* line but the next-in-flow
|
|
// is not there - force a switch to the overflow line list.
|
|
line = line_end;
|
|
}
|
|
|
|
PRBool wasSearchingOverflowList = searchingOverflowList;
|
|
TryAllLines(&line, &line_end, &searchingOverflowList);
|
|
if (NS_UNLIKELY(searchingOverflowList && !wasSearchingOverflowList &&
|
|
prevSibling)) {
|
|
// We switched to the overflow line list and we have a prev sibling
|
|
// (in the main list), in this case we don't want to pick up any
|
|
// sibling list from the deceased frames (bug 344557).
|
|
prevSibling->SetNextSibling(nsnull);
|
|
prevSibling = nsnull;
|
|
}
|
|
#ifdef NOISY_REMOVE_FRAME
|
|
printf("DoRemoveFrame: now on %s line=%p prevSibling=%p\n",
|
|
searchingOverflowList?"overflow":"normal", line.get(),
|
|
prevSibling);
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
VerifyLines(PR_TRUE);
|
|
#endif
|
|
|
|
// Advance to next flow block if the frame has more continuations
|
|
return RemoveBlockChild(aDeletedFrame, aDestroyFrames);
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::DeleteNextInFlowChild(nsPresContext* aPresContext,
|
|
nsIFrame* aNextInFlow)
|
|
{
|
|
nsIFrame* prevInFlow = aNextInFlow->GetPrevInFlow();
|
|
NS_PRECONDITION(prevInFlow, "bad next-in-flow");
|
|
NS_PRECONDITION(IsChild(aNextInFlow), "bad geometric parent");
|
|
|
|
#ifdef IBMBIDI
|
|
if (!(prevInFlow->GetStateBits() & NS_FRAME_IS_BIDI) ||
|
|
(NS_STATIC_CAST(nsIFrame*,
|
|
aPresContext->PropertyTable()->GetProperty(prevInFlow, nsLayoutAtoms::nextBidi)) !=
|
|
aNextInFlow))
|
|
#endif // IBMBIDI
|
|
DoRemoveFrame(aNextInFlow);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
// Float support
|
|
nsresult
|
|
nsBlockFrame::ReflowFloat(nsBlockReflowState& aState,
|
|
nsPlaceholderFrame* aPlaceholder,
|
|
nsFloatCache* aFloatCache,
|
|
nsReflowStatus& aReflowStatus)
|
|
{
|
|
// Reflow the float.
|
|
nsIFrame* floatFrame = aPlaceholder->GetOutOfFlowFrame();
|
|
aReflowStatus = NS_FRAME_COMPLETE;
|
|
|
|
#ifdef NOISY_FLOAT
|
|
printf("Reflow Float %p in parent %p, availSpace(%d,%d,%d,%d)\n",
|
|
aPlaceholder->GetOutOfFlowFrame(), this,
|
|
aState.mAvailSpaceRect.x, aState.mAvailSpaceRect.y,
|
|
aState.mAvailSpaceRect.width, aState.mAvailSpaceRect.height
|
|
);
|
|
#endif
|
|
|
|
// Compute the available width. By default, assume the width of the
|
|
// containing block.
|
|
nscoord availWidth;
|
|
if (aState.GetFlag(BRS_UNCONSTRAINEDWIDTH)) {
|
|
availWidth = NS_UNCONSTRAINEDSIZE;
|
|
}
|
|
else {
|
|
const nsStyleDisplay* floatDisplay = floatFrame->GetStyleDisplay();
|
|
|
|
if (NS_STYLE_DISPLAY_TABLE != floatDisplay->mDisplay ||
|
|
eCompatibility_NavQuirks != aState.mPresContext->CompatibilityMode() ) {
|
|
availWidth = aState.mContentArea.width;
|
|
}
|
|
else {
|
|
// This quirk matches the one in nsBlockReflowState::FlowAndPlaceFloat
|
|
// give tables only the available space
|
|
// if they can shrink we may not be constrained to place
|
|
// them in the next line
|
|
availWidth = aState.mAvailSpaceRect.width;
|
|
// round down to twips per pixel so that we fit
|
|
// needed when prev. float has procentage width
|
|
// (maybe is a table flaw that makes table chose to round up
|
|
// but i don't want to change that, too risky)
|
|
nscoord twp = aState.mPresContext->IntScaledPixelsToTwips(1);
|
|
availWidth -= availWidth % twp;
|
|
}
|
|
}
|
|
nscoord availHeight = NS_UNCONSTRAINEDSIZE == aState.mContentArea.height
|
|
? NS_UNCONSTRAINEDSIZE
|
|
: PR_MAX(0, aState.mContentArea.height - aState.mY);
|
|
|
|
// If the float's width is automatic, we can't let the float's
|
|
// width shrink below its maxElementWidth.
|
|
const nsStylePosition* position = floatFrame->GetStylePosition();
|
|
PRBool isAutoWidth = (eStyleUnit_Auto == position->mWidth.GetUnit());
|
|
|
|
// We'll need to compute the max element size if either 1) we're
|
|
// auto-width or 2) the state wanted us to compute it anyway.
|
|
PRBool computeMaxElementWidth =
|
|
isAutoWidth || aState.GetFlag(BRS_COMPUTEMAXELEMENTWIDTH);
|
|
|
|
nsRect availSpace(aState.BorderPadding().left,
|
|
aState.BorderPadding().top,
|
|
availWidth, availHeight);
|
|
|
|
// construct the html reflow state for the float. ReflowBlock will
|
|
// initialize it.
|
|
nsHTMLReflowState floatRS(aState.mPresContext, aState.mReflowState,
|
|
floatFrame,
|
|
nsSize(availSpace.width, availSpace.height),
|
|
aState.mReflowState.reason);
|
|
|
|
// Setup a block reflow state to reflow the float.
|
|
nsBlockReflowContext brc(aState.mPresContext, aState.mReflowState,
|
|
computeMaxElementWidth,
|
|
aState.GetFlag(BRS_COMPUTEMAXWIDTH));
|
|
|
|
// Reflow the float
|
|
PRBool isAdjacentWithTop = aState.IsAdjacentWithTop();
|
|
|
|
nsIFrame* clearanceFrame = nsnull;
|
|
nsresult rv;
|
|
do {
|
|
nsCollapsingMargin margin;
|
|
PRBool mayNeedRetry = PR_FALSE;
|
|
floatRS.mDiscoveredClearance = nsnull;
|
|
// Only first in flow gets a top margin.
|
|
if (!floatFrame->GetPrevInFlow()) {
|
|
nsBlockReflowContext::ComputeCollapsedTopMargin(floatRS, &margin,
|
|
clearanceFrame, &mayNeedRetry);
|
|
|
|
if (mayNeedRetry && !clearanceFrame) {
|
|
floatRS.mDiscoveredClearance = &clearanceFrame;
|
|
// We don't need to push the space manager state because the the block has its own
|
|
// space manager that will be destroyed and recreated
|
|
}
|
|
}
|
|
|
|
rv = brc.ReflowBlock(availSpace, PR_TRUE, margin,
|
|
0, isAdjacentWithTop,
|
|
aFloatCache->mOffsets, floatRS,
|
|
aReflowStatus);
|
|
} while (NS_SUCCEEDED(rv) && clearanceFrame);
|
|
|
|
// An incomplete reflow status means we should split the float
|
|
// if the height is constrained (bug 145305).
|
|
if (NS_FRAME_IS_NOT_COMPLETE(aReflowStatus) && (NS_UNCONSTRAINEDSIZE == availHeight))
|
|
aReflowStatus = NS_FRAME_COMPLETE;
|
|
|
|
if (NS_FRAME_IS_COMPLETE(aReflowStatus)) {
|
|
// Float is now complete, so delete the placeholder's next in
|
|
// flows, if any; their floats (which are this float's continuations)
|
|
// have already been deleted.
|
|
// XXX won't this be done later in nsLineLayout::ReflowFrame anyway??
|
|
nsIFrame* nextInFlow = aPlaceholder->GetNextInFlow();
|
|
if (nextInFlow) {
|
|
NS_STATIC_CAST(nsHTMLContainerFrame*, nextInFlow->GetParent())
|
|
->DeleteNextInFlowChild(aState.mPresContext, nextInFlow);
|
|
// that takes care of all subsequent nextinflows too
|
|
}
|
|
}
|
|
if (aReflowStatus & NS_FRAME_REFLOW_NEXTINFLOW) {
|
|
aState.mReflowStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
|
|
}
|
|
|
|
if (NS_SUCCEEDED(rv) && isAutoWidth) {
|
|
nscoord maxElementWidth = brc.GetMaxElementWidth();
|
|
if (maxElementWidth > availSpace.width) {
|
|
// The float's maxElementWidth is larger than the available
|
|
// width. Reflow it again, this time pinning the width to the
|
|
// maxElementWidth.
|
|
availSpace.width = maxElementWidth;
|
|
// construct the html reflow state for the float.
|
|
// ReflowBlock will initialize it.
|
|
nsHTMLReflowState redoFloatRS(aState.mPresContext, aState.mReflowState,
|
|
floatFrame,
|
|
nsSize(availSpace.width, availSpace.height),
|
|
aState.mReflowState.reason);
|
|
|
|
clearanceFrame = nsnull;
|
|
do {
|
|
nsCollapsingMargin marginMEW;
|
|
PRBool mayNeedRetry = PR_FALSE;
|
|
nsBlockReflowContext::ComputeCollapsedTopMargin(redoFloatRS, &marginMEW, clearanceFrame, &mayNeedRetry);
|
|
|
|
if (mayNeedRetry && !clearanceFrame) {
|
|
redoFloatRS.mDiscoveredClearance = &clearanceFrame;
|
|
// We don't need to push the space manager state because the
|
|
// the block has its own space manager that will be
|
|
// destroyed and recreated
|
|
} else {
|
|
redoFloatRS.mDiscoveredClearance = nsnull;
|
|
}
|
|
|
|
rv = brc.ReflowBlock(availSpace, PR_TRUE, marginMEW,
|
|
0, isAdjacentWithTop,
|
|
aFloatCache->mOffsets, redoFloatRS,
|
|
aReflowStatus);
|
|
} while (NS_SUCCEEDED(rv) && clearanceFrame);
|
|
}
|
|
}
|
|
|
|
if (floatFrame->GetType() == nsLayoutAtoms::letterFrame) {
|
|
// We never split floating first letters; an incomplete state for
|
|
// such frames simply means that there is more content to be
|
|
// reflowed on the line.
|
|
if (NS_FRAME_IS_NOT_COMPLETE(aReflowStatus))
|
|
aReflowStatus = NS_FRAME_COMPLETE;
|
|
}
|
|
|
|
// Remove the float from the reflow tree.
|
|
if (aState.mReflowState.path)
|
|
aState.mReflowState.path->RemoveChild(floatFrame);
|
|
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
// Capture the margin information for the caller
|
|
const nsMargin& m = brc.GetMargin();
|
|
aFloatCache->mMargins.top = brc.GetTopMargin();
|
|
aFloatCache->mMargins.right = m.right;
|
|
// Only last in flows get a bottom margin
|
|
if (NS_FRAME_IS_COMPLETE(aReflowStatus)) {
|
|
brc.GetCarriedOutBottomMargin().Include(m.bottom);
|
|
}
|
|
aFloatCache->mMargins.bottom = brc.GetCarriedOutBottomMargin().get();
|
|
aFloatCache->mMargins.left = m.left;
|
|
|
|
const nsHTMLReflowMetrics& metrics = brc.GetMetrics();
|
|
aFloatCache->mCombinedArea = metrics.mOverflowArea;
|
|
|
|
// Set the rect, make sure the view is properly sized and positioned,
|
|
// and tell the frame we're done reflowing it
|
|
// XXXldb This seems like the wrong place to be doing this -- shouldn't
|
|
// we be doing this in nsBlockReflowState::FlowAndPlaceFloat after
|
|
// we've positioned the float, and shouldn't we be doing the equivalent
|
|
// of |::PlaceFrameView| here?
|
|
floatFrame->SetSize(nsSize(metrics.width, metrics.height));
|
|
if (floatFrame->HasView()) {
|
|
nsContainerFrame::SyncFrameViewAfterReflow(aState.mPresContext, floatFrame,
|
|
floatFrame->GetView(),
|
|
&metrics.mOverflowArea,
|
|
NS_FRAME_NO_MOVE_VIEW);
|
|
}
|
|
// Pass floatRS so the frame hierarchy can be used (redoFloatRS has the same hierarchy)
|
|
floatFrame->DidReflow(aState.mPresContext, &floatRS,
|
|
NS_FRAME_REFLOW_FINISHED);
|
|
|
|
// If we computed it, then stash away the max-element-width for later
|
|
if (aState.GetFlag(BRS_COMPUTEMAXELEMENTWIDTH)) {
|
|
nscoord mew = brc.GetMaxElementWidth() +
|
|
aFloatCache->mMargins.left + aFloatCache->mMargins.right;
|
|
|
|
// This is all we need to do to include the float
|
|
// max-element-width since we don't require that we end up with
|
|
// content next to floats.
|
|
aState.UpdateMaxElementWidth(mew); // fix for bug 13553
|
|
|
|
// Allow the float width to be restored in state recovery.
|
|
aFloatCache->mMaxElementWidth = mew;
|
|
}
|
|
#ifdef NOISY_FLOAT
|
|
printf("end ReflowFloat %p, sized to %d,%d\n",
|
|
floatFrame, metrics.width, metrics.height);
|
|
#endif
|
|
|
|
// If the placeholder was continued and its first-in-flow was followed by a
|
|
// <BR>, then cache the <BR>'s break type in aState.mFloatBreakType so that
|
|
// the next frame after the placeholder can combine that break type with its own
|
|
nsIFrame* prevPlaceholder = aPlaceholder->GetPrevInFlow();
|
|
if (prevPlaceholder) {
|
|
// the break occurs only after the last continued placeholder
|
|
PRBool lastPlaceholder = PR_TRUE;
|
|
nsIFrame* next = aPlaceholder->GetNextSibling();
|
|
if (next) {
|
|
if (nsLayoutAtoms::placeholderFrame == next->GetType()) {
|
|
lastPlaceholder = PR_FALSE;
|
|
}
|
|
}
|
|
if (lastPlaceholder) {
|
|
// get the containing block of prevPlaceholder which is our prev-in-flow
|
|
if (mPrevInFlow) {
|
|
// get the break type of the last line in mPrevInFlow
|
|
line_iterator endLine = --((nsBlockFrame*)mPrevInFlow)->end_lines();
|
|
if (endLine->HasFloatBreakAfter()) {
|
|
aState.mFloatBreakType = endLine->GetBreakTypeAfter();
|
|
}
|
|
}
|
|
else NS_ASSERTION(PR_FALSE, "no prev in flow");
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Painting, event handling
|
|
|
|
PRIntn
|
|
nsBlockFrame::GetSkipSides() const
|
|
{
|
|
PRIntn skip = 0;
|
|
if (nsnull != mPrevInFlow) {
|
|
skip |= 1 << NS_SIDE_TOP;
|
|
}
|
|
if (nsnull != mNextInFlow) {
|
|
skip |= 1 << NS_SIDE_BOTTOM;
|
|
}
|
|
return skip;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
static void ComputeCombinedArea(nsLineList& aLines,
|
|
nscoord aWidth, nscoord aHeight,
|
|
nsRect& aResult)
|
|
{
|
|
nscoord xa = 0, ya = 0, xb = aWidth, yb = aHeight;
|
|
for (nsLineList::iterator line = aLines.begin(), line_end = aLines.end();
|
|
line != line_end;
|
|
++line) {
|
|
// Compute min and max x/y values for the reflowed frame's
|
|
// combined areas
|
|
nsRect lineCombinedArea(line->GetCombinedArea());
|
|
nscoord x = lineCombinedArea.x;
|
|
nscoord y = lineCombinedArea.y;
|
|
nscoord xmost = x + lineCombinedArea.width;
|
|
nscoord ymost = y + lineCombinedArea.height;
|
|
if (x < xa) {
|
|
xa = x;
|
|
}
|
|
if (xmost > xb) {
|
|
xb = xmost;
|
|
}
|
|
if (y < ya) {
|
|
ya = y;
|
|
}
|
|
if (ymost > yb) {
|
|
yb = ymost;
|
|
}
|
|
}
|
|
|
|
aResult.x = xa;
|
|
aResult.y = ya;
|
|
aResult.width = xb - xa;
|
|
aResult.height = yb - ya;
|
|
}
|
|
#endif
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::IsVisibleForPainting(nsPresContext * aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
PRBool aCheckVis,
|
|
PRBool* aIsVisible)
|
|
{
|
|
// first check to see if we are visible
|
|
if (aCheckVis) {
|
|
if (!GetStyleVisibility()->IsVisible()) {
|
|
*aIsVisible = PR_FALSE;
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
// Start by assuming we are visible and need to be painted
|
|
*aIsVisible = PR_TRUE;
|
|
|
|
// NOTE: GetSelectionforVisCheck checks the pagination to make sure we are printing
|
|
// In otherwords, the selection will ALWAYS be null if we are not printing, meaning
|
|
// the visibility will be TRUE in that case
|
|
nsCOMPtr<nsISelection> selection;
|
|
nsresult rv = GetSelectionForVisCheck(aPresContext, getter_AddRefs(selection));
|
|
if (NS_SUCCEEDED(rv) && selection) {
|
|
nsCOMPtr<nsIDOMNode> node(do_QueryInterface(mContent));
|
|
|
|
nsCOMPtr<nsIDOMHTMLHtmlElement> html(do_QueryInterface(mContent));
|
|
nsCOMPtr<nsIDOMHTMLBodyElement> body(do_QueryInterface(mContent));
|
|
|
|
if (!html && !body) {
|
|
rv = selection->ContainsNode(node, PR_TRUE, aIsVisible);
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
/* virtual */ void
|
|
nsBlockFrame::PaintTextDecorationLines(nsIRenderingContext& aRenderingContext,
|
|
nscolor aColor,
|
|
nscoord aOffset,
|
|
nscoord aAscent,
|
|
nscoord aSize)
|
|
{
|
|
aRenderingContext.SetColor(aColor);
|
|
for (nsLineList::iterator line = begin_lines(), line_start = line,
|
|
line_end = end_lines();
|
|
line != line_end; ++line) {
|
|
if (!line->IsBlock()) {
|
|
nscoord start = line->mBounds.x;
|
|
nscoord width = line->mBounds.width;
|
|
|
|
if (line == line_start) {
|
|
// Adjust for the text-indent. See similar code in
|
|
// nsLineLayout::BeginLineReflow.
|
|
nscoord indent = 0;
|
|
const nsStyleText* styleText = GetStyleText();
|
|
nsStyleUnit unit = styleText->mTextIndent.GetUnit();
|
|
if (eStyleUnit_Coord == unit) {
|
|
indent = styleText->mTextIndent.GetCoordValue();
|
|
} else if (eStyleUnit_Percent == unit) {
|
|
// It's a percentage of the containing block width.
|
|
nsIFrame* containingBlock =
|
|
nsHTMLReflowState::GetContainingBlockFor(this);
|
|
NS_ASSERTION(containingBlock, "Must have containing block!");
|
|
indent = nscoord(styleText->mTextIndent.GetPercentValue() *
|
|
containingBlock->GetRect().width);
|
|
}
|
|
|
|
// Adjust the start position and the width of the decoration by the
|
|
// value of the indent. Note that indent can be negative; that's OK.
|
|
// It'll just increase the width (which can also happen to be
|
|
// negative!).
|
|
start += indent;
|
|
width -= indent;
|
|
}
|
|
|
|
// Only paint if we have a positive width
|
|
if (width > 0) {
|
|
aRenderingContext.FillRect(start,
|
|
line->mBounds.y + line->GetAscent() - aOffset,
|
|
width, aSize);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::Paint(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
const nsRect& aDirtyRect,
|
|
nsFramePaintLayer aWhichLayer,
|
|
PRUint32 aFlags)
|
|
{
|
|
if (NS_FRAME_IS_UNFLOWABLE & mState) {
|
|
return NS_OK;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
if (gNoisyDamageRepair) {
|
|
if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
|
|
PRInt32 depth = GetDepth();
|
|
nsRect ca;
|
|
::ComputeCombinedArea(mLines, mRect.width, mRect.height, ca);
|
|
nsFrame::IndentBy(stdout, depth);
|
|
ListTag(stdout);
|
|
printf(": bounds=%d,%d,%d,%d dirty=%d,%d,%d,%d ca=%d,%d,%d,%d\n",
|
|
mRect.x, mRect.y, mRect.width, mRect.height,
|
|
aDirtyRect.x, aDirtyRect.y, aDirtyRect.width, aDirtyRect.height,
|
|
ca.x, ca.y, ca.width, ca.height);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
|
|
PaintSelf(aPresContext, aRenderingContext, aDirtyRect);
|
|
}
|
|
|
|
PRBool paintingSuppressed = PR_FALSE;
|
|
aPresContext->PresShell()->IsPaintingSuppressed(&paintingSuppressed);
|
|
if (paintingSuppressed)
|
|
return NS_OK;
|
|
|
|
const nsStyleDisplay* disp = GetStyleDisplay();
|
|
|
|
// If overflow is hidden then set the clip rect so that children don't
|
|
// leak out of us. Note that because overflow'-clip' only applies to
|
|
// the content area we do this after painting the border and background
|
|
if (NS_STYLE_OVERFLOW_CLIP == disp->mOverflowX) {
|
|
aRenderingContext.PushState();
|
|
SetOverflowClipRect(aRenderingContext);
|
|
}
|
|
|
|
// Child elements have the opportunity to override the visibility
|
|
// property and display even if the parent is hidden
|
|
if (NS_FRAME_PAINT_LAYER_FLOATS == aWhichLayer) {
|
|
PaintFloats(aPresContext, aRenderingContext, aDirtyRect);
|
|
}
|
|
|
|
PaintDecorationsAndChildren(aPresContext, aRenderingContext,
|
|
aDirtyRect, aWhichLayer, PR_TRUE);
|
|
|
|
if (NS_STYLE_OVERFLOW_CLIP == disp->mOverflowX)
|
|
aRenderingContext.PopState();
|
|
|
|
#if 0
|
|
if ((NS_FRAME_PAINT_LAYER_DEBUG == aWhichLayer) && GetShowFrameBorders()) {
|
|
// Render the bands in the spacemanager
|
|
nsSpaceManager* sm = mSpaceManager;
|
|
|
|
if (nsnull != sm) {
|
|
nsBlockBandData band;
|
|
band.Init(sm, nsSize(mRect.width, mRect.height));
|
|
nscoord y = 0;
|
|
while (y < mRect.height) {
|
|
nsRect availArea;
|
|
band.GetAvailableSpace(y, PR_FALSE, availArea);
|
|
|
|
// Render a box and a diagonal line through the band
|
|
aRenderingContext.SetColor(NS_RGB(0,255,0));
|
|
aRenderingContext.DrawRect(0, availArea.y,
|
|
mRect.width, availArea.height);
|
|
aRenderingContext.DrawLine(0, availArea.y,
|
|
mRect.width, availArea.YMost());
|
|
|
|
// Render boxes and opposite diagonal lines around the
|
|
// unavailable parts of the band.
|
|
PRInt32 i;
|
|
for (i = 0; i < band.GetTrapezoidCount(); i++) {
|
|
const nsBandTrapezoid* trapezoid = band.GetTrapezoid(i);
|
|
if (nsBandTrapezoid::Available != trapezoid->mState) {
|
|
nsRect r = trapezoid->GetRect();
|
|
if (nsBandTrapezoid::OccupiedMultiple == trapezoid->mState) {
|
|
aRenderingContext.SetColor(NS_RGB(0,255,128));
|
|
}
|
|
else {
|
|
aRenderingContext.SetColor(NS_RGB(128,255,0));
|
|
}
|
|
aRenderingContext.DrawRect(r);
|
|
aRenderingContext.DrawLine(r.x, r.YMost(), r.XMost(), r.y);
|
|
}
|
|
}
|
|
y = availArea.YMost();
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::PaintFloats(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
const nsRect& aDirtyRect)
|
|
{
|
|
for (nsIFrame* floatFrame = mFloats.FirstChild();
|
|
floatFrame;
|
|
floatFrame = floatFrame->GetNextSibling()) {
|
|
PaintChild(aPresContext, aRenderingContext, aDirtyRect,
|
|
floatFrame, NS_FRAME_PAINT_LAYER_BACKGROUND);
|
|
PaintChild(aPresContext, aRenderingContext, aDirtyRect,
|
|
floatFrame, NS_FRAME_PAINT_LAYER_FLOATS);
|
|
PaintChild(aPresContext, aRenderingContext, aDirtyRect,
|
|
floatFrame, NS_FRAME_PAINT_LAYER_FOREGROUND);
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
static void DebugOutputDrawLine(nsFramePaintLayer aWhichLayer, PRInt32 aDepth,
|
|
nsLineBox* aLine, PRBool aDrawn) {
|
|
if (nsBlockFrame::gNoisyDamageRepair &&
|
|
(NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer)) {
|
|
nsFrame::IndentBy(stdout, aDepth+1);
|
|
nsRect lineArea = aLine->GetCombinedArea();
|
|
printf("%s line=%p bounds=%d,%d,%d,%d ca=%d,%d,%d,%d\n",
|
|
aDrawn ? "draw" : "skip",
|
|
NS_STATIC_CAST(void*, aLine),
|
|
aLine->mBounds.x, aLine->mBounds.y,
|
|
aLine->mBounds.width, aLine->mBounds.height,
|
|
lineArea.x, lineArea.y,
|
|
lineArea.width, lineArea.height);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static inline void
|
|
PaintLine(const nsRect& aLineArea, const nsRect& aDirtyRect,
|
|
nsBlockFrame::line_iterator& aLine, PRInt32 aDepth,
|
|
PRInt32& aDrawnLines, nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
nsFramePaintLayer aWhichLayer, nsBlockFrame* aFrame) {
|
|
// If the line's combined area (which includes child frames that
|
|
// stick outside of the line's bounding box or our bounding box)
|
|
// intersects the dirty rect then paint the line.
|
|
if (aLineArea.Intersects(aDirtyRect)) {
|
|
#ifdef DEBUG
|
|
DebugOutputDrawLine(aWhichLayer, aDepth, aLine.get(), PR_TRUE);
|
|
if (nsBlockFrame::gLamePaintMetrics) {
|
|
aDrawnLines++;
|
|
}
|
|
#endif
|
|
nsIFrame* kid = aLine->mFirstChild;
|
|
PRInt32 n = aLine->GetChildCount();
|
|
while (--n >= 0) {
|
|
aFrame->PaintChild(aPresContext, aRenderingContext, aDirtyRect, kid,
|
|
aWhichLayer);
|
|
kid = kid->GetNextSibling();
|
|
}
|
|
}
|
|
#ifdef DEBUG
|
|
else {
|
|
DebugOutputDrawLine(aWhichLayer, aDepth, aLine.get(), PR_FALSE);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::PaintChildren(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
const nsRect& aDirtyRect,
|
|
nsFramePaintLayer aWhichLayer,
|
|
PRUint32 aFlags)
|
|
{
|
|
PRInt32 drawnLines; // Will only be used if set (gLamePaintMetrics).
|
|
PRInt32 depth = 0;
|
|
#ifdef DEBUG
|
|
if (gNoisyDamageRepair) {
|
|
if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
|
|
depth = GetDepth();
|
|
}
|
|
}
|
|
PRTime start = LL_ZERO; // Initialize these variables to silence the compiler.
|
|
if (gLamePaintMetrics) {
|
|
start = PR_Now();
|
|
drawnLines = 0;
|
|
}
|
|
#endif
|
|
|
|
nsLineBox* cursor = GetFirstLineContaining(aDirtyRect.y);
|
|
line_iterator line_end = end_lines();
|
|
|
|
if (cursor) {
|
|
for (line_iterator line = mLines.begin(cursor);
|
|
line != line_end;
|
|
++line) {
|
|
nsRect lineArea = line->GetCombinedArea();
|
|
if (!lineArea.IsEmpty()) {
|
|
// Because we have a cursor, the combinedArea.ys are non-decreasing.
|
|
// Once we've passed aDirtyRect.YMost(), we can never see it again.
|
|
if (lineArea.y >= aDirtyRect.YMost()) {
|
|
break;
|
|
}
|
|
PaintLine(lineArea, aDirtyRect, line, depth, drawnLines, aPresContext,
|
|
aRenderingContext, aWhichLayer, this);
|
|
}
|
|
}
|
|
} else {
|
|
PRBool nonDecreasingYs = PR_TRUE;
|
|
PRInt32 lineCount = 0;
|
|
nscoord lastY = PR_INT32_MIN;
|
|
nscoord lastYMost = PR_INT32_MIN;
|
|
for (line_iterator line = begin_lines();
|
|
line != line_end;
|
|
++line) {
|
|
nsRect lineArea = line->GetCombinedArea();
|
|
if (!lineArea.IsEmpty()) {
|
|
if (lineArea.y < lastY
|
|
|| lineArea.YMost() < lastYMost) {
|
|
nonDecreasingYs = PR_FALSE;
|
|
}
|
|
lastY = lineArea.y;
|
|
lastYMost = lineArea.YMost();
|
|
|
|
PaintLine(lineArea, aDirtyRect, line, depth, drawnLines, aPresContext,
|
|
aRenderingContext, aWhichLayer, this);
|
|
}
|
|
lineCount++;
|
|
}
|
|
|
|
if (nonDecreasingYs && lineCount >= MIN_LINES_NEEDING_CURSOR) {
|
|
SetupLineCursor();
|
|
}
|
|
}
|
|
|
|
if (NS_FRAME_PAINT_LAYER_FOREGROUND == aWhichLayer) {
|
|
if ((nsnull != mBullet) && HaveOutsideBullet()) {
|
|
// Paint outside bullets manually
|
|
PaintChild(aPresContext, aRenderingContext, aDirtyRect, mBullet,
|
|
aWhichLayer);
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
if (gLamePaintMetrics) {
|
|
PRTime end = PR_Now();
|
|
|
|
PRInt32 numLines = mLines.size();
|
|
if (!numLines) numLines = 1;
|
|
PRTime lines, deltaPerLine, delta;
|
|
LL_I2L(lines, numLines);
|
|
LL_SUB(delta, end, start);
|
|
LL_DIV(deltaPerLine, delta, lines);
|
|
|
|
ListTag(stdout);
|
|
char buf[400];
|
|
PR_snprintf(buf, sizeof(buf),
|
|
": %lld elapsed (%lld per line) lines=%d drawn=%d skip=%d",
|
|
delta, deltaPerLine,
|
|
numLines, drawnLines, numLines - drawnLines);
|
|
printf("%s\n", buf);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
// XXXldb Does this handle all overlap cases correctly? (How?)
|
|
nsresult
|
|
nsBlockFrame::GetClosestLine(nsILineIterator *aLI,
|
|
const nsPoint &aPoint,
|
|
PRInt32 &aClosestLine)
|
|
{
|
|
if (!aLI)
|
|
return NS_ERROR_NULL_POINTER;
|
|
|
|
nsRect rect;
|
|
PRInt32 numLines;
|
|
PRInt32 lineFrameCount;
|
|
nsIFrame *firstFrame;
|
|
PRUint32 flags;
|
|
|
|
nsresult result = aLI->GetNumLines(&numLines);
|
|
|
|
if (NS_FAILED(result) || numLines < 0)
|
|
return NS_OK;//do not handle
|
|
|
|
PRInt32 shifted = numLines;
|
|
PRInt32 start = 0, midpoint = 0;
|
|
PRInt32 y = 0;
|
|
|
|
while(shifted > 0)
|
|
{
|
|
// Cut the number of lines to look at in half and
|
|
// calculate the midpoint of the region we are looking at.
|
|
|
|
shifted >>= 1; //divide by 2
|
|
midpoint = start + shifted;
|
|
|
|
// Get the dimensions of the line that is at the half
|
|
// point of the region we are looking at.
|
|
|
|
result = aLI->GetLine(midpoint, &firstFrame, &lineFrameCount,rect,&flags);
|
|
if (NS_FAILED(result))
|
|
break;//do not handle
|
|
|
|
// Check to see if our point lies with the line's Y bounds.
|
|
|
|
y = aPoint.y - rect.y;
|
|
if (y >=0 && (aPoint.y < (rect.y+rect.height)))
|
|
{
|
|
aClosestLine = midpoint; //spot on!
|
|
return NS_OK;
|
|
}
|
|
|
|
if (y > 0)
|
|
{
|
|
// If we get here, no match was found above, so aPoint.y must
|
|
// be greater than the Y bounds of the current line rect. Move
|
|
// our starting point just beyond the midpoint of the current region.
|
|
|
|
start = midpoint;
|
|
|
|
if (numLines > 1 && start < (numLines - 1))
|
|
++start;
|
|
else
|
|
shifted = 0;
|
|
}
|
|
}
|
|
|
|
// Make sure we don't go off the edge in either direction!
|
|
|
|
NS_ASSERTION(start >=0 && start <= numLines, "Invalid start calculated.");
|
|
|
|
if (start < 0)
|
|
start = 0;
|
|
else if (start >= numLines)
|
|
start = numLines - 1;
|
|
|
|
aClosestLine = start; //close as we could come
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::HandleEvent(nsPresContext* aPresContext,
|
|
nsGUIEvent* aEvent,
|
|
nsEventStatus* aEventStatus)
|
|
{
|
|
|
|
nsresult result;
|
|
nsIPresShell *shell = nsnull;
|
|
if (aEvent->message == NS_MOUSE_MOVE) {
|
|
shell = aPresContext->GetPresShell();
|
|
if (!shell)
|
|
return NS_OK;
|
|
nsCOMPtr<nsIFrameSelection> frameSelection;
|
|
PRBool mouseDown = PR_FALSE;
|
|
//check to see if we need to ask the selection controller..
|
|
if (mState & NS_FRAME_INDEPENDENT_SELECTION)
|
|
{
|
|
nsCOMPtr<nsISelectionController> selCon;
|
|
result = GetSelectionController(aPresContext, getter_AddRefs(selCon));
|
|
if (NS_FAILED(result) || !selCon)
|
|
return result?result:NS_ERROR_FAILURE;
|
|
frameSelection = do_QueryInterface(selCon);
|
|
}
|
|
else
|
|
frameSelection = shell->FrameSelection();
|
|
if (!frameSelection || NS_FAILED(frameSelection->GetMouseDownState(&mouseDown)) || !mouseDown)
|
|
return NS_OK;//do not handle
|
|
}
|
|
|
|
if (aEvent->message == NS_MOUSE_LEFT_BUTTON_DOWN || aEvent->message == NS_MOUSE_MOVE ||
|
|
aEvent->message == NS_MOUSE_LEFT_DOUBLECLICK ) {
|
|
|
|
nsMouseEvent *me = (nsMouseEvent *)aEvent;
|
|
|
|
nsIFrame *resultFrame = nsnull;//this will be passed the handle event when we
|
|
//can tell who to pass it to
|
|
nsIFrame *mainframe = this;
|
|
shell = aPresContext->GetPresShell();
|
|
if (!shell)
|
|
return NS_OK;
|
|
nsCOMPtr<nsILineIterator> it( do_QueryInterface(mainframe, &result) );
|
|
nsPeekOffsetStruct pos;
|
|
nsPoint viewOffset;
|
|
nsIView* parentWithView;
|
|
GetOffsetFromView(viewOffset, &parentWithView);
|
|
// The offset returned by GetOffsetFromView is not trustworthy.
|
|
// It's just the sum of frame positions and is not the true
|
|
// geometric offset. So recalculate the true geometric offset.
|
|
NS_ASSERTION(nsLayoutUtils::GetFrameFor(parentWithView),
|
|
"GetOffsetFromView shouldn't be returning a frameless view");
|
|
viewOffset = GetOffsetTo(nsLayoutUtils::GetFrameFor(parentWithView));
|
|
|
|
while(NS_OK == result)
|
|
{ //we are starting aloop to allow us to "drill down to the one we want"
|
|
PRInt32 closestLine;
|
|
|
|
// aEvent->point is relative to our view. We need to make it relative to
|
|
// mainframe, via this frame.
|
|
if (NS_FAILED(result = GetClosestLine(it,
|
|
aEvent->point - viewOffset - mainframe->GetOffsetTo(this), closestLine)))
|
|
return result;
|
|
|
|
//we will now ask where to go. if we cant find what we want"aka another block frame"
|
|
//we drill down again
|
|
pos.mShell = shell;
|
|
pos.mDirection = eDirNext;
|
|
pos.mDesiredX = aEvent->point.x;
|
|
pos.mScrollViewStop = PR_FALSE;
|
|
pos.mIsKeyboardSelect = PR_FALSE;
|
|
result = nsFrame::GetNextPrevLineFromeBlockFrame(aPresContext,
|
|
&pos,
|
|
mainframe,
|
|
closestLine-1,
|
|
0
|
|
);
|
|
|
|
if (NS_SUCCEEDED(result) && pos.mResultFrame){
|
|
if (result == NS_OK)
|
|
it = do_QueryInterface(pos.mResultFrame, &result);//if this fails thats ok
|
|
resultFrame = pos.mResultFrame;
|
|
mainframe = resultFrame;
|
|
}
|
|
else
|
|
break;//time to go nothing was found
|
|
}
|
|
//end while loop. if nssucceeded resutl then keep going that means
|
|
//we have successfully hit another block frame and we should keep going.
|
|
|
|
|
|
if (resultFrame)
|
|
{
|
|
// Translate aEvent->point to resultFrame's closest view (bug 180015).
|
|
nsPoint tmp;
|
|
nsIView* resultFrameParentView;
|
|
resultFrame->GetOffsetFromView(tmp, &resultFrameParentView);
|
|
if (parentWithView != resultFrameParentView && resultFrameParentView) {
|
|
aEvent->point -= resultFrameParentView->GetOffsetTo(parentWithView);
|
|
}
|
|
|
|
if (NS_POSITION_BEFORE_TABLE == result)
|
|
{
|
|
nsCOMPtr<nsISelectionController> selCon;
|
|
result = GetSelectionController(aPresContext, getter_AddRefs(selCon));
|
|
//get the selection controller
|
|
if (NS_SUCCEEDED(result) && selCon)
|
|
{
|
|
PRInt16 displayresult;
|
|
selCon->GetDisplaySelection(&displayresult);
|
|
if (displayresult == nsISelectionController::SELECTION_OFF)
|
|
return NS_OK;//nothing to do we cannot affect selection from here
|
|
}
|
|
PRBool mouseDown = aEvent->message == NS_MOUSE_MOVE;
|
|
result = shell->FrameSelection()->HandleClick(pos.mResultContent,
|
|
pos.mContentOffset,
|
|
pos.mContentOffsetEnd,
|
|
mouseDown || me->isShift,
|
|
PR_FALSE,
|
|
pos.mPreferLeft);
|
|
}
|
|
else
|
|
result = resultFrame->HandleEvent(aPresContext, aEvent, aEventStatus);//else let the frame/container do what it needs
|
|
/* Note that the above call to HandleEvent may capture the
|
|
mouse. If so, don't try to capture again. */
|
|
if (aEvent->message == NS_MOUSE_LEFT_BUTTON_DOWN && !IsMouseCaptured(aPresContext))
|
|
CaptureMouse(aPresContext, PR_TRUE);
|
|
return result;
|
|
}
|
|
else
|
|
{
|
|
return NS_OK; //just stop it
|
|
}
|
|
}
|
|
return nsFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
|
|
}
|
|
|
|
#ifdef ACCESSIBILITY
|
|
NS_IMETHODIMP nsBlockFrame::GetAccessible(nsIAccessible** aAccessible)
|
|
{
|
|
*aAccessible = nsnull;
|
|
nsCOMPtr<nsIAccessibilityService> accService =
|
|
do_GetService("@mozilla.org/accessibilityService;1");
|
|
NS_ENSURE_TRUE(accService, NS_ERROR_FAILURE);
|
|
|
|
// treat <hr> as block element instead of inline.
|
|
if (mContent->Tag() == nsHTMLAtoms::hr) {
|
|
return accService->CreateHTMLHRAccessible(NS_STATIC_CAST(nsIFrame*, this), aAccessible);
|
|
}
|
|
|
|
nsPresContext *aPresContext = GetPresContext();
|
|
if (!mBullet || !aPresContext) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
const nsStyleList* myList = GetStyleList();
|
|
nsAutoString bulletText;
|
|
if (myList->mListStyleImage || myList->mListStyleType == NS_STYLE_LIST_STYLE_DISC ||
|
|
myList->mListStyleType == NS_STYLE_LIST_STYLE_CIRCLE ||
|
|
myList->mListStyleType == NS_STYLE_LIST_STYLE_SQUARE) {
|
|
bulletText.Assign(PRUnichar(0x2022));; // Unicode bullet character
|
|
}
|
|
else if (myList->mListStyleType != NS_STYLE_LIST_STYLE_NONE) {
|
|
mBullet->GetListItemText(*myList, bulletText);
|
|
}
|
|
|
|
return accService->CreateHTMLLIAccessible(NS_STATIC_CAST(nsIFrame*, this),
|
|
NS_STATIC_CAST(nsIFrame*, mBullet),
|
|
bulletText,
|
|
aAccessible);
|
|
}
|
|
#endif
|
|
|
|
void nsBlockFrame::ClearLineCursor() {
|
|
if (!(GetStateBits() & NS_BLOCK_HAS_LINE_CURSOR)) {
|
|
return;
|
|
}
|
|
|
|
UnsetProperty(nsLayoutAtoms::lineCursorProperty);
|
|
RemoveStateBits(NS_BLOCK_HAS_LINE_CURSOR);
|
|
}
|
|
|
|
void nsBlockFrame::SetupLineCursor() {
|
|
if (GetStateBits() & NS_BLOCK_HAS_LINE_CURSOR
|
|
|| mLines.empty()) {
|
|
return;
|
|
}
|
|
|
|
SetProperty(nsLayoutAtoms::lineCursorProperty,
|
|
mLines.front(), nsnull);
|
|
AddStateBits(NS_BLOCK_HAS_LINE_CURSOR);
|
|
}
|
|
|
|
nsLineBox* nsBlockFrame::GetFirstLineContaining(nscoord y) {
|
|
if (!(GetStateBits() & NS_BLOCK_HAS_LINE_CURSOR)) {
|
|
return nsnull;
|
|
}
|
|
|
|
nsLineBox* property = NS_STATIC_CAST(nsLineBox*,
|
|
GetProperty(nsLayoutAtoms::lineCursorProperty));
|
|
line_iterator cursor = mLines.begin(property);
|
|
nsRect cursorArea = cursor->GetCombinedArea();
|
|
|
|
while ((cursorArea.IsEmpty() || cursorArea.YMost() > y)
|
|
&& cursor != mLines.front()) {
|
|
cursor = cursor.prev();
|
|
cursorArea = cursor->GetCombinedArea();
|
|
}
|
|
while ((cursorArea.IsEmpty() || cursorArea.YMost() <= y)
|
|
&& cursor != mLines.back()) {
|
|
cursor = cursor.next();
|
|
cursorArea = cursor->GetCombinedArea();
|
|
}
|
|
|
|
if (cursor.get() != property) {
|
|
SetProperty(nsLayoutAtoms::lineCursorProperty,
|
|
cursor.get(), nsnull);
|
|
}
|
|
|
|
return cursor.get();
|
|
}
|
|
|
|
static inline void
|
|
GetFrameFromLine(const nsRect& aLineArea, const nsPoint& aTmp,
|
|
nsBlockFrame::line_iterator& aLine,
|
|
nsFramePaintLayer aWhichLayer, nsIFrame** aFrame) {
|
|
if (aLineArea.Contains(aTmp)) {
|
|
nsIFrame* kid = aLine->mFirstChild;
|
|
PRInt32 n = aLine->GetChildCount();
|
|
while (--n >= 0) {
|
|
nsIFrame *hit;
|
|
nsresult rv = kid->GetFrameForPoint(aTmp, aWhichLayer, &hit);
|
|
|
|
if (NS_SUCCEEDED(rv) && hit) {
|
|
*aFrame = hit;
|
|
}
|
|
kid = kid->GetNextSibling();
|
|
}
|
|
}
|
|
}
|
|
|
|
// Optimized function that uses line combined areas to skip lines
|
|
// we know can't contain the point
|
|
nsresult
|
|
nsBlockFrame::GetFrameForPointUsing(const nsPoint& aPoint,
|
|
nsIAtom* aList,
|
|
nsFramePaintLayer aWhichLayer,
|
|
PRBool aConsiderSelf,
|
|
nsIFrame** aFrame)
|
|
{
|
|
if (aList) {
|
|
return nsContainerFrame::GetFrameForPointUsing(aPoint,
|
|
aList, aWhichLayer, aConsiderSelf, aFrame);
|
|
}
|
|
|
|
PRBool inThisFrame = mRect.Contains(aPoint);
|
|
|
|
if (! ((mState & NS_FRAME_OUTSIDE_CHILDREN) || inThisFrame ) ) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
*aFrame = nsnull;
|
|
nsPoint tmp(aPoint.x - mRect.x, aPoint.y - mRect.y);
|
|
|
|
nsPoint originOffset;
|
|
nsIView *view = nsnull;
|
|
nsresult rv = GetOriginToViewOffset(originOffset, &view);
|
|
|
|
if (NS_SUCCEEDED(rv) && view)
|
|
tmp += originOffset;
|
|
|
|
nsLineBox* cursor = GetFirstLineContaining(tmp.y);
|
|
line_iterator line_end = end_lines();
|
|
|
|
if (cursor) {
|
|
// This is the fast path for large blocks
|
|
for (line_iterator line = mLines.begin(cursor);
|
|
line != line_end;
|
|
++line) {
|
|
nsRect lineArea = line->GetCombinedArea();
|
|
// Because we have a cursor, the combinedArea.ys are non-decreasing.
|
|
// Once we've passed tmp.y, we can never see it again.
|
|
if (!lineArea.IsEmpty()) {
|
|
if (lineArea.y > tmp.y) {
|
|
break;
|
|
}
|
|
GetFrameFromLine(lineArea, tmp, line, aWhichLayer, aFrame);
|
|
}
|
|
}
|
|
} else {
|
|
PRBool nonDecreasingYs = PR_TRUE;
|
|
PRInt32 lineCount = 0;
|
|
nscoord lastY = PR_INT32_MIN;
|
|
nscoord lastYMost = PR_INT32_MIN;
|
|
for (line_iterator line = mLines.begin();
|
|
line != line_end;
|
|
++line) {
|
|
nsRect lineArea = line->GetCombinedArea();
|
|
if (!lineArea.IsEmpty()) {
|
|
if (lineArea.y < lastY
|
|
|| lineArea.YMost() < lastYMost) {
|
|
nonDecreasingYs = PR_FALSE;
|
|
}
|
|
lastY = lineArea.y;
|
|
lastYMost = lineArea.YMost();
|
|
|
|
GetFrameFromLine(lineArea, tmp, line, aWhichLayer, aFrame);
|
|
}
|
|
lineCount++;
|
|
}
|
|
|
|
if (nonDecreasingYs && lineCount >= MIN_LINES_NEEDING_CURSOR) {
|
|
SetupLineCursor();
|
|
}
|
|
}
|
|
|
|
if (*aFrame) {
|
|
return NS_OK;
|
|
}
|
|
|
|
if ( inThisFrame && aConsiderSelf ) {
|
|
if (GetStyleVisibility()->IsVisible()) {
|
|
*aFrame = this;
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::GetFrameForPoint(const nsPoint& aPoint,
|
|
nsFramePaintLayer aWhichLayer,
|
|
nsIFrame** aFrame)
|
|
{
|
|
nsresult rv;
|
|
|
|
switch (aWhichLayer) {
|
|
case NS_FRAME_PAINT_LAYER_FOREGROUND:
|
|
rv = GetFrameForPointUsing(aPoint, nsnull,
|
|
NS_FRAME_PAINT_LAYER_FOREGROUND, PR_FALSE,
|
|
aFrame);
|
|
if (NS_OK == rv) {
|
|
return NS_OK;
|
|
}
|
|
if (nsnull != mBullet) {
|
|
rv = GetFrameForPointUsing(aPoint, nsLayoutAtoms::bulletList,
|
|
NS_FRAME_PAINT_LAYER_FOREGROUND, PR_FALSE,
|
|
aFrame);
|
|
}
|
|
return rv;
|
|
break;
|
|
|
|
case NS_FRAME_PAINT_LAYER_FLOATS:
|
|
// we painted our floats before our children, and thus
|
|
// we should check floats within children first
|
|
rv = GetFrameForPointUsing(aPoint, nsnull,
|
|
NS_FRAME_PAINT_LAYER_FLOATS, PR_FALSE,
|
|
aFrame);
|
|
if (NS_OK == rv) {
|
|
return NS_OK;
|
|
}
|
|
if (mFloats.NotEmpty()) {
|
|
return GetFrameForPointUsing(aPoint, nsLayoutAtoms::floatList,
|
|
NS_FRAME_PAINT_LAYER_ALL, PR_FALSE,
|
|
aFrame);
|
|
} else {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
break;
|
|
|
|
case NS_FRAME_PAINT_LAYER_BACKGROUND:
|
|
// we're a block, so PR_TRUE for consider self
|
|
return GetFrameForPointUsing(aPoint, nsnull,
|
|
NS_FRAME_PAINT_LAYER_BACKGROUND, PR_TRUE,
|
|
aFrame);
|
|
break;
|
|
}
|
|
// we shouldn't get here
|
|
NS_ASSERTION(PR_FALSE, "aWhichLayer was not understood");
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::ReflowDirtyChild(nsIPresShell* aPresShell, nsIFrame* aChild)
|
|
{
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
ListTag(stdout);
|
|
printf(": ReflowDirtyChild (");
|
|
if (aChild)
|
|
nsFrame::ListTag(stdout, aChild);
|
|
else
|
|
printf("null");
|
|
printf(")\n");
|
|
}
|
|
AutoNoisyIndenter indent(gNoisyReflow);
|
|
#endif
|
|
|
|
if (aChild) {
|
|
// See if the child is absolutely positioned
|
|
if (aChild->GetStateBits() & NS_FRAME_OUT_OF_FLOW) {
|
|
const nsStyleDisplay* disp = aChild->GetStyleDisplay();
|
|
|
|
if (disp->IsAbsolutelyPositioned()) {
|
|
// Generate a reflow command to reflow our dirty absolutely
|
|
// positioned child frames.
|
|
// XXX Note that we don't currently try and coalesce the reflow commands,
|
|
// although we should. We can't use the NS_FRAME_HAS_DIRTY_CHILDREN
|
|
// flag, because that's used to indicate whether in-flow children are
|
|
// dirty...
|
|
nsresult rv = aPresShell->
|
|
AppendReflowCommand(this, eReflowType_ReflowDirty,
|
|
mAbsoluteContainer.GetChildListName());
|
|
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
printf("scheduled reflow command for absolutely positioned frame\n");
|
|
}
|
|
#endif
|
|
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
if (aChild == mBullet && HaveOutsideBullet()) {
|
|
// The bullet lives in the first line, unless the first line has
|
|
// height 0 and there is a second line, in which case it lives
|
|
// in the second line.
|
|
line_iterator bulletLine = begin_lines();
|
|
if (bulletLine != end_lines() && bulletLine->mBounds.height == 0 &&
|
|
bulletLine != mLines.back()) {
|
|
bulletLine = bulletLine.next();
|
|
}
|
|
|
|
if (bulletLine != end_lines()) {
|
|
MarkLineDirty(bulletLine);
|
|
}
|
|
// otherwise we have an empty line list, and ReflowDirtyLines
|
|
// will handle reflowing the bullet.
|
|
} else {
|
|
// Mark the line containing the child frame dirty.
|
|
line_iterator fline = FindLineFor(aChild);
|
|
if (fline != end_lines())
|
|
MarkLineDirty(fline);
|
|
}
|
|
}
|
|
|
|
// Either generate a reflow command to reflow the dirty child or
|
|
// coalesce this reflow request with an existing reflow command
|
|
if (!(mState & NS_FRAME_HAS_DIRTY_CHILDREN)) {
|
|
// If this is the first dirty child,
|
|
// post a dirty children reflow command targeted at yourself
|
|
mState |= NS_FRAME_HAS_DIRTY_CHILDREN;
|
|
|
|
aPresShell->AppendReflowCommand(this, eReflowType_ReflowDirty, nsnull);
|
|
|
|
#ifdef DEBUG
|
|
if (gNoisyReflow) {
|
|
IndentBy(stdout, gNoiseIndent);
|
|
printf("scheduled reflow command targeted at self\n");
|
|
}
|
|
#endif
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Start Debugging
|
|
|
|
#ifdef NS_DEBUG
|
|
static PRBool
|
|
InLineList(nsLineList& aLines, nsIFrame* aFrame)
|
|
{
|
|
for (nsLineList::iterator line = aLines.begin(), line_end = aLines.end();
|
|
line != line_end;
|
|
++line) {
|
|
nsIFrame* frame = line->mFirstChild;
|
|
PRInt32 n = line->GetChildCount();
|
|
while (--n >= 0) {
|
|
if (frame == aFrame) {
|
|
return PR_TRUE;
|
|
}
|
|
frame = frame->GetNextSibling();
|
|
}
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
static PRBool
|
|
InSiblingList(nsLineList& aLines, nsIFrame* aFrame)
|
|
{
|
|
if (! aLines.empty()) {
|
|
nsIFrame* frame = aLines.front()->mFirstChild;
|
|
while (frame) {
|
|
if (frame == aFrame) {
|
|
return PR_TRUE;
|
|
}
|
|
frame = frame->GetNextSibling();
|
|
}
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
PRBool
|
|
nsBlockFrame::IsChild(nsIFrame* aFrame)
|
|
{
|
|
// Continued out-of-flows don't satisfy InLineList(), continued out-of-flows
|
|
// and placeholders don't satisfy InSiblingList().
|
|
PRBool skipLineList = PR_FALSE;
|
|
PRBool skipSiblingList = PR_FALSE;
|
|
nsIFrame* prevInFlow = aFrame->GetPrevInFlow();
|
|
PRBool isPlaceholder = nsLayoutAtoms::placeholderFrame == aFrame->GetType();
|
|
if (prevInFlow) {
|
|
nsFrameState state = aFrame->GetStateBits();
|
|
skipLineList = (state & NS_FRAME_OUT_OF_FLOW);
|
|
skipSiblingList = isPlaceholder || (state & NS_FRAME_OUT_OF_FLOW);
|
|
}
|
|
|
|
if (isPlaceholder) {
|
|
nsFrameList* overflowPlaceholders = GetOverflowPlaceholders();
|
|
if (overflowPlaceholders && overflowPlaceholders->ContainsFrame(aFrame)) {
|
|
return PR_TRUE;
|
|
}
|
|
}
|
|
|
|
if (aFrame->GetParent() != (nsIFrame*)this) {
|
|
return PR_FALSE;
|
|
}
|
|
if ((skipLineList || InLineList(mLines, aFrame)) &&
|
|
(skipSiblingList || InSiblingList(mLines, aFrame))) {
|
|
return PR_TRUE;
|
|
}
|
|
nsLineList* overflowLines = GetOverflowLines();
|
|
if (overflowLines && (skipLineList || InLineList(*overflowLines, aFrame)) &&
|
|
(skipSiblingList || InSiblingList(*overflowLines, aFrame))) {
|
|
return PR_TRUE;
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::VerifyTree() const
|
|
{
|
|
// XXX rewrite this
|
|
return NS_OK;
|
|
}
|
|
#endif
|
|
|
|
// End Debugging
|
|
//////////////////////////////////////////////////////////////////////
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::Init(nsPresContext* aPresContext,
|
|
nsIContent* aContent,
|
|
nsIFrame* aParent,
|
|
nsStyleContext* aContext,
|
|
nsIFrame* aPrevInFlow)
|
|
{
|
|
if (aPrevInFlow) {
|
|
// Copy over the block/area frame type flags
|
|
nsBlockFrame* blockFrame = (nsBlockFrame*)aPrevInFlow;
|
|
|
|
SetFlags(blockFrame->mState & NS_BLOCK_FLAGS_MASK);
|
|
}
|
|
|
|
nsresult rv = nsBlockFrameSuper::Init(aPresContext, aContent, aParent,
|
|
aContext, aPrevInFlow);
|
|
|
|
if (IsBoxWrapped())
|
|
mState |= NS_BLOCK_SPACE_MGR;
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::SetInitialChildList(nsPresContext* aPresContext,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aChildList)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
|
|
if (mAbsoluteContainer.GetChildListName() == aListName) {
|
|
mAbsoluteContainer.SetInitialChildList(this, aPresContext, aListName, aChildList);
|
|
}
|
|
else if (nsLayoutAtoms::floatList == aListName) {
|
|
mFloats.SetFrames(aChildList);
|
|
}
|
|
else {
|
|
|
|
#ifdef DEBUG
|
|
// The only times a block that is an anonymous box is allowed to have a
|
|
// first-letter frame are when it's the block inside a non-anonymous cell,
|
|
// the block inside a fieldset, a scrolled content block, or a column
|
|
// content block. Also, a block that has a previous continuation can't
|
|
// have a first letter frame.
|
|
nsIAtom *pseudo = GetStyleContext()->GetPseudoType();
|
|
PRBool haveFirstLetterStyle =
|
|
!mPrevInFlow &&
|
|
(!pseudo ||
|
|
(pseudo == nsCSSAnonBoxes::cellContent &&
|
|
mParent->GetStyleContext()->GetPseudoType() == nsnull) ||
|
|
pseudo == nsCSSAnonBoxes::fieldsetContent ||
|
|
pseudo == nsCSSAnonBoxes::scrolledContent ||
|
|
pseudo == nsCSSAnonBoxes::columnContent) &&
|
|
nsRefPtr<nsStyleContext>(GetFirstLetterStyle(aPresContext)) != nsnull;
|
|
NS_ASSERTION(haveFirstLetterStyle ==
|
|
((mState & NS_BLOCK_HAS_FIRST_LETTER_STYLE) != 0),
|
|
"NS_BLOCK_HAS_FIRST_LETTER_STYLE state out of sync");
|
|
#endif
|
|
|
|
rv = AddFrames(aChildList, nsnull);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
// Create list bullet if this is a list-item. Note that this is done
|
|
// here so that RenumberLists will work (it needs the bullets to
|
|
// store the bullet numbers).
|
|
const nsStyleDisplay* styleDisplay = GetStyleDisplay();
|
|
if ((nsnull == mPrevInFlow) &&
|
|
(NS_STYLE_DISPLAY_LIST_ITEM == styleDisplay->mDisplay) &&
|
|
(nsnull == mBullet)) {
|
|
// Resolve style for the bullet frame
|
|
const nsStyleList* styleList = GetStyleList();
|
|
nsIAtom *pseudoElement;
|
|
switch (styleList->mListStyleType) {
|
|
case NS_STYLE_LIST_STYLE_DISC:
|
|
case NS_STYLE_LIST_STYLE_CIRCLE:
|
|
case NS_STYLE_LIST_STYLE_SQUARE:
|
|
pseudoElement = nsCSSPseudoElements::mozListBullet;
|
|
break;
|
|
default:
|
|
pseudoElement = nsCSSPseudoElements::mozListNumber;
|
|
break;
|
|
}
|
|
|
|
nsIPresShell *shell = aPresContext->PresShell();
|
|
|
|
nsRefPtr<nsStyleContext> kidSC = shell->StyleSet()->
|
|
ResolvePseudoStyleFor(mContent, pseudoElement, mStyleContext);
|
|
|
|
// Create bullet frame
|
|
nsBulletFrame* bullet = new (shell) nsBulletFrame;
|
|
|
|
if (nsnull == bullet) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
bullet->Init(aPresContext, mContent, this, kidSC, nsnull);
|
|
|
|
// If the list bullet frame should be positioned inside then add
|
|
// it to the flow now.
|
|
if (NS_STYLE_LIST_STYLE_POSITION_INSIDE ==
|
|
styleList->mListStylePosition) {
|
|
AddFrames(bullet, nsnull);
|
|
mState &= ~NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET;
|
|
}
|
|
else {
|
|
mState |= NS_BLOCK_FRAME_HAS_OUTSIDE_BULLET;
|
|
}
|
|
|
|
mBullet = bullet;
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
// static
|
|
PRBool
|
|
nsBlockFrame::FrameStartsCounterScope(nsIFrame* aFrame)
|
|
{
|
|
nsIContent* content = aFrame->GetContent();
|
|
if (!content || !content->IsContentOfType(nsIContent::eHTML))
|
|
return PR_FALSE;
|
|
nsINodeInfo *ni = content->GetNodeInfo();
|
|
return ni->Equals(nsHTMLAtoms::ol) ||
|
|
ni->Equals(nsHTMLAtoms::ul) ||
|
|
ni->Equals(nsHTMLAtoms::dir) ||
|
|
ni->Equals(nsHTMLAtoms::menu);
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::RenumberLists(nsPresContext* aPresContext)
|
|
{
|
|
if (!FrameStartsCounterScope(this)) {
|
|
// If this frame doesn't start a counter scope then we don't need
|
|
// to renumber child list items.
|
|
return;
|
|
}
|
|
|
|
// Setup initial list ordinal value
|
|
// XXX Map html's start property to counter-reset style
|
|
PRInt32 ordinal = 1;
|
|
|
|
nsGenericHTMLElement *hc = nsGenericHTMLElement::FromContent(mContent);
|
|
|
|
if (hc) {
|
|
const nsAttrValue* attr = hc->GetParsedAttr(nsHTMLAtoms::start);
|
|
if (attr && attr->Type() == nsAttrValue::eInteger) {
|
|
ordinal = attr->GetIntegerValue();
|
|
}
|
|
}
|
|
|
|
// Get to first-in-flow
|
|
nsBlockFrame* block = (nsBlockFrame*) GetFirstInFlow();
|
|
RenumberListsInBlock(aPresContext, block, &ordinal, 0);
|
|
}
|
|
|
|
PRBool
|
|
nsBlockFrame::RenumberListsInBlock(nsPresContext* aPresContext,
|
|
nsBlockFrame* aBlockFrame,
|
|
PRInt32* aOrdinal,
|
|
PRInt32 aDepth)
|
|
{
|
|
PRBool renumberedABullet = PR_FALSE;
|
|
|
|
while (nsnull != aBlockFrame) {
|
|
// Examine each line in the block
|
|
for (line_iterator line = aBlockFrame->begin_lines(),
|
|
line_end = aBlockFrame->end_lines();
|
|
line != line_end;
|
|
++line) {
|
|
nsIFrame* kid = line->mFirstChild;
|
|
PRInt32 n = line->GetChildCount();
|
|
while (--n >= 0) {
|
|
PRBool kidRenumberedABullet = RenumberListsFor(aPresContext, kid, aOrdinal, aDepth);
|
|
if (kidRenumberedABullet) {
|
|
line->MarkDirty();
|
|
renumberedABullet = PR_TRUE;
|
|
}
|
|
kid = kid->GetNextSibling();
|
|
}
|
|
}
|
|
|
|
// Advance to the next continuation
|
|
aBlockFrame = NS_STATIC_CAST(nsBlockFrame*, aBlockFrame->GetNextInFlow());
|
|
}
|
|
|
|
return renumberedABullet;
|
|
}
|
|
|
|
PRBool
|
|
nsBlockFrame::RenumberListsFor(nsPresContext* aPresContext,
|
|
nsIFrame* aKid,
|
|
PRInt32* aOrdinal,
|
|
PRInt32 aDepth)
|
|
{
|
|
NS_PRECONDITION(aPresContext && aKid && aOrdinal, "null params are immoral!");
|
|
|
|
// add in a sanity check for absurdly deep frame trees. See bug 42138
|
|
if (MAX_DEPTH_FOR_LIST_RENUMBERING < aDepth)
|
|
return PR_FALSE;
|
|
|
|
PRBool kidRenumberedABullet = PR_FALSE;
|
|
|
|
// if the frame is a placeholder, then get the out of flow frame
|
|
nsIFrame* kid = nsPlaceholderFrame::GetRealFrameFor(aKid);
|
|
|
|
// drill down through any wrappers to the real frame
|
|
kid = kid->GetContentInsertionFrame();
|
|
if (!kid)
|
|
return PR_FALSE;
|
|
|
|
// If the frame is a list-item and the frame implements our
|
|
// block frame API then get its bullet and set the list item
|
|
// ordinal.
|
|
const nsStyleDisplay* display = kid->GetStyleDisplay();
|
|
if (NS_STYLE_DISPLAY_LIST_ITEM == display->mDisplay) {
|
|
// Make certain that the frame is a block frame in case
|
|
// something foreign has crept in.
|
|
nsBlockFrame* listItem;
|
|
nsresult rv = kid->QueryInterface(kBlockFrameCID, (void**)&listItem);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
if (nsnull != listItem->mBullet) {
|
|
PRBool changed;
|
|
*aOrdinal = listItem->mBullet->SetListItemOrdinal(*aOrdinal,
|
|
&changed);
|
|
if (changed) {
|
|
kidRenumberedABullet = PR_TRUE;
|
|
|
|
// Invalidate the bullet content area since it may look different now
|
|
nsRect damageRect(nsPoint(0, 0), listItem->mBullet->GetSize());
|
|
listItem->mBullet->Invalidate(damageRect);
|
|
}
|
|
}
|
|
|
|
// XXX temporary? if the list-item has child list-items they
|
|
// should be numbered too; especially since the list-item is
|
|
// itself (ASSUMED!) not to be a counter-resetter.
|
|
PRBool meToo = RenumberListsInBlock(aPresContext, listItem, aOrdinal, aDepth + 1);
|
|
if (meToo) {
|
|
kidRenumberedABullet = PR_TRUE;
|
|
}
|
|
}
|
|
}
|
|
else if (NS_STYLE_DISPLAY_BLOCK == display->mDisplay) {
|
|
if (FrameStartsCounterScope(kid)) {
|
|
// Don't bother recursing into a block frame that is a new
|
|
// counter scope. Any list-items in there will be handled by
|
|
// it.
|
|
}
|
|
else {
|
|
// If the display=block element is a block frame then go ahead
|
|
// and recurse into it, as it might have child list-items.
|
|
nsBlockFrame* kidBlock;
|
|
nsresult rv = kid->QueryInterface(kBlockFrameCID, (void**) &kidBlock);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
kidRenumberedABullet = RenumberListsInBlock(aPresContext, kidBlock, aOrdinal, aDepth + 1);
|
|
}
|
|
}
|
|
}
|
|
return kidRenumberedABullet;
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::ReflowBullet(nsBlockReflowState& aState,
|
|
nsHTMLReflowMetrics& aMetrics)
|
|
{
|
|
// Reflow the bullet now
|
|
nsSize availSize;
|
|
availSize.width = NS_UNCONSTRAINEDSIZE;
|
|
availSize.height = NS_UNCONSTRAINEDSIZE;
|
|
|
|
// Get the reason right.
|
|
// XXXwaterson Should this look just like the logic in
|
|
// nsBlockReflowContext::ReflowBlock and nsLineLayout::ReflowFrame?
|
|
const nsHTMLReflowState &rs = aState.mReflowState;
|
|
nsReflowReason reason = rs.reason;
|
|
if (reason == eReflowReason_Incremental) {
|
|
if (! rs.path->HasChild(mBullet)) {
|
|
// An incremental reflow not explicitly destined to (or through)
|
|
// the child should be treated as a resize...
|
|
reason = eReflowReason_Resize;
|
|
}
|
|
|
|
// ...unless its an incremental `style changed' reflow targeted at
|
|
// the block, in which case, we propagate that to its children.
|
|
nsHTMLReflowCommand *command = rs.path->mReflowCommand;
|
|
if (command) {
|
|
if (command->Type() == eReflowType_StyleChanged)
|
|
reason = eReflowReason_StyleChange;
|
|
}
|
|
}
|
|
|
|
nsHTMLReflowState reflowState(aState.mPresContext, rs,
|
|
mBullet, availSize, reason);
|
|
nsReflowStatus status;
|
|
mBullet->WillReflow(aState.mPresContext);
|
|
mBullet->Reflow(aState.mPresContext, aMetrics, reflowState, status);
|
|
|
|
// Place the bullet now; use its right margin to distance it
|
|
// from the rest of the frames in the line
|
|
nscoord x =
|
|
#ifdef IBMBIDI
|
|
(rs.availableWidth != NS_UNCONSTRAINEDSIZE &&
|
|
NS_STYLE_DIRECTION_RTL == GetStyleVisibility()->mDirection)
|
|
// According to the CSS2 spec, section 12.6.1, outside marker box
|
|
// is distanced from the associated principal box's border edge.
|
|
// |rs.availableWidth| reflects exactly a border edge: it includes
|
|
// border, padding, and content area, without margins.
|
|
? rs.availableWidth + reflowState.mComputedMargin.left :
|
|
#endif
|
|
- reflowState.mComputedMargin.right - aMetrics.width;
|
|
|
|
// Approximate the bullets position; vertical alignment will provide
|
|
// the final vertical location.
|
|
const nsMargin& bp = aState.BorderPadding();
|
|
nscoord y = bp.top;
|
|
mBullet->SetRect(nsRect(x, y, aMetrics.width, aMetrics.height));
|
|
mBullet->DidReflow(aState.mPresContext, &aState.mReflowState, NS_FRAME_REFLOW_FINISHED);
|
|
}
|
|
|
|
// This is used to scan frames for any float placeholders, add their
|
|
// floats to the list represented by aHead and aTail, and remove the
|
|
// floats from whatever list they might be in. We only search the
|
|
// inline descendants. The floats must be children of 'this'.
|
|
void nsBlockFrame::CollectFloats(nsIFrame* aFrame, nsFrameList& aList, nsIFrame** aTail,
|
|
PRBool aFromOverflow, PRBool aCollectSiblings) {
|
|
while (aFrame) {
|
|
// Don't descend into float containing blocks.
|
|
if (!aFrame->IsFloatContainingBlock()) {
|
|
nsIFrame *outOfFlowFrame = nsLayoutUtils::GetFloatFromPlaceholder(aFrame);
|
|
if (outOfFlowFrame) {
|
|
// Make sure that its parent is us. Otherwise we don't want
|
|
// to mess around with it because it belongs to someone
|
|
// else. I think this could happen if the overflow lines
|
|
// contain a block descendant which owns its own floats.
|
|
NS_ASSERTION(outOfFlowFrame->GetParent() == this,
|
|
"Out of flow frame doesn't have the expected parent");
|
|
if (aFromOverflow) {
|
|
nsAutoOOFFrameList oofs(this);
|
|
oofs.mList.RemoveFrame(outOfFlowFrame);
|
|
} else {
|
|
mFloats.RemoveFrame(outOfFlowFrame);
|
|
|
|
}
|
|
aList.InsertFrame(nsnull, *aTail, outOfFlowFrame);
|
|
*aTail = outOfFlowFrame;
|
|
}
|
|
|
|
CollectFloats(aFrame->GetFirstChild(nsnull), aList, aTail, aFromOverflow,
|
|
PR_TRUE);
|
|
}
|
|
if (!aCollectSiblings)
|
|
break;
|
|
aFrame = aFrame->GetNextSibling();
|
|
}
|
|
}
|
|
|
|
void
|
|
nsBlockFrame::CheckFloats(nsBlockReflowState& aState)
|
|
{
|
|
#ifdef DEBUG
|
|
// Check that the float list is what we would have built
|
|
nsAutoVoidArray lineFloats;
|
|
for (line_iterator line = begin_lines(), line_end = end_lines();
|
|
line != line_end; ++line) {
|
|
if (line->HasFloats()) {
|
|
nsFloatCache* fc = line->GetFirstFloat();
|
|
while (fc) {
|
|
nsIFrame* floatFrame = fc->mPlaceholder->GetOutOfFlowFrame();
|
|
lineFloats.AppendElement(floatFrame);
|
|
fc = fc->Next();
|
|
}
|
|
}
|
|
}
|
|
|
|
nsAutoVoidArray storedFloats;
|
|
PRBool equal = PR_TRUE;
|
|
PRInt32 i = 0;
|
|
for (nsIFrame* f = mFloats.FirstChild(); f; f = f->GetNextSibling()) {
|
|
storedFloats.AppendElement(f);
|
|
if (i < lineFloats.Count() && lineFloats.ElementAt(i) != f) {
|
|
equal = PR_FALSE;
|
|
}
|
|
++i;
|
|
}
|
|
|
|
if (!equal || lineFloats.Count() != storedFloats.Count()) {
|
|
NS_WARNING("nsBlockFrame::CheckFloats: Explicit float list is out of sync with float cache");
|
|
#if defined(DEBUG_roc)
|
|
nsIFrameDebug::RootFrameList(GetPresContext(), stdout, 0);
|
|
for (i = 0; i < lineFloats.Count(); ++i) {
|
|
printf("Line float: %p\n", lineFloats.ElementAt(i));
|
|
}
|
|
for (i = 0; i < storedFloats.Count(); ++i) {
|
|
printf("Stored float: %p\n", storedFloats.ElementAt(i));
|
|
}
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
nsFrameList oofs = GetOverflowOutOfFlows();
|
|
if (oofs.NotEmpty()) {
|
|
// Floats that were pushed should be removed from our space
|
|
// manager. Otherwise the space manager's YMost or XMost might
|
|
// be larger than necessary, causing this block to get an
|
|
// incorrect desired height (or width). Some of these floats
|
|
// may not actually have been added to the space manager because
|
|
// they weren't reflowed before being pushed; that's OK,
|
|
// RemoveRegions will ignore them. It is safe to do this here
|
|
// because we know from here on the space manager will only be
|
|
// used for its XMost and YMost, not to place new floats and
|
|
// lines.
|
|
aState.mSpaceManager->RemoveTrailingRegions(oofs.FirstChild());
|
|
}
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsBlockFrame::SetParent(const nsIFrame* aParent)
|
|
{
|
|
nsresult rv = nsBlockFrameSuper::SetParent(aParent);
|
|
if (IsBoxWrapped())
|
|
mState |= NS_BLOCK_SPACE_MGR;
|
|
|
|
// XXX should we clear NS_BLOCK_SPACE_MGR if we were the child of a box
|
|
// but no longer are?
|
|
|
|
return rv;
|
|
}
|
|
|
|
// XXX keep the text-run data in the first-in-flow of the block
|
|
|
|
#ifdef DEBUG
|
|
void
|
|
nsBlockFrame::VerifyLines(PRBool aFinalCheckOK)
|
|
{
|
|
if (!gVerifyLines) {
|
|
return;
|
|
}
|
|
if (mLines.empty()) {
|
|
return;
|
|
}
|
|
|
|
// Add up the counts on each line. Also validate that IsFirstLine is
|
|
// set properly.
|
|
PRInt32 count = 0;
|
|
PRBool seenBlock = PR_FALSE;
|
|
line_iterator line, line_end;
|
|
for (line = begin_lines(), line_end = end_lines();
|
|
line != line_end;
|
|
++line) {
|
|
if (aFinalCheckOK) {
|
|
NS_ABORT_IF_FALSE(line->GetChildCount(), "empty line");
|
|
if (line->IsBlock()) {
|
|
seenBlock = PR_TRUE;
|
|
}
|
|
if (line->IsBlock()) {
|
|
NS_ASSERTION(1 == line->GetChildCount(), "bad first line");
|
|
}
|
|
}
|
|
count += line->GetChildCount();
|
|
}
|
|
|
|
// Then count the frames
|
|
PRInt32 frameCount = 0;
|
|
nsIFrame* frame = mLines.front()->mFirstChild;
|
|
while (frame) {
|
|
frameCount++;
|
|
frame = frame->GetNextSibling();
|
|
}
|
|
NS_ASSERTION(count == frameCount, "bad line list");
|
|
|
|
// Next: test that each line has right number of frames on it
|
|
for (line = begin_lines(), line_end = end_lines();
|
|
line != line_end;
|
|
) {
|
|
count = line->GetChildCount();
|
|
frame = line->mFirstChild;
|
|
while (--count >= 0) {
|
|
frame = frame->GetNextSibling();
|
|
}
|
|
++line;
|
|
if ((line != line_end) && (0 != line->GetChildCount())) {
|
|
NS_ASSERTION(frame == line->mFirstChild, "bad line list");
|
|
}
|
|
}
|
|
}
|
|
|
|
// Its possible that a frame can have some frames on an overflow
|
|
// list. But its never possible for multiple frames to have overflow
|
|
// lists. Check that this fact is actually true.
|
|
void
|
|
nsBlockFrame::VerifyOverflowSituation()
|
|
{
|
|
nsBlockFrame* flow = (nsBlockFrame*) GetFirstInFlow();
|
|
while (nsnull != flow) {
|
|
nsLineList* overflowLines = GetOverflowLines();
|
|
if (nsnull != overflowLines) {
|
|
NS_ASSERTION(! overflowLines->empty(), "should not be empty if present");
|
|
NS_ASSERTION(overflowLines->front()->mFirstChild, "bad overflow list");
|
|
}
|
|
flow = (nsBlockFrame*) flow->mNextInFlow;
|
|
}
|
|
}
|
|
|
|
PRInt32
|
|
nsBlockFrame::GetDepth() const
|
|
{
|
|
PRInt32 depth = 0;
|
|
nsIFrame* parent = mParent;
|
|
while (parent) {
|
|
parent = parent->GetParent();
|
|
depth++;
|
|
}
|
|
return depth;
|
|
}
|
|
#endif
|