RetroZilla/layout/generic/nsPageContentFrame.cpp

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2015-10-21 05:03:22 +02:00
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsPageContentFrame.h"
#include "nsHTMLParts.h"
#include "nsIContent.h"
#include "nsPresContext.h"
#include "nsIRenderingContext.h"
#include "nsHTMLAtoms.h"
#include "nsLayoutAtoms.h"
#include "nsIPresShell.h"
#include "nsIDeviceContext.h"
#include "nsReadableUtils.h"
#include "nsSimplePageSequence.h"
#include "nsIView.h"
#if defined(DEBUG_rods) || defined(DEBUG_dcone)
//#define DEBUG_PRINTING
#endif
nsresult
NS_NewPageContentFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
{
NS_PRECONDITION(aNewFrame, "null OUT ptr");
nsPageContentFrame* it = new (aPresShell) nsPageContentFrame;
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
*aNewFrame = it;
return NS_OK;
}
nsPageContentFrame::nsPageContentFrame() :
mClipRect(-1, -1, -1, -1)
{
}
NS_IMETHODIMP nsPageContentFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsPageContentFrame", aReflowState.reason);
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
aStatus = NS_FRAME_COMPLETE; // initialize out parameter
if (eReflowReason_Incremental != aReflowState.reason) {
// Resize our frame allowing it only to be as big as we are
// XXX Pay attention to the page's border and padding...
if (mFrames.NotEmpty()) {
nsIFrame* frame = mFrames.FirstChild();
nsSize maxSize(aReflowState.availableWidth, aReflowState.availableHeight);
nsHTMLReflowState kidReflowState(aPresContext, aReflowState, frame, maxSize);
mPD->mPageContentSize = aReflowState.availableWidth;
// Reflow the page content area to get the child's desired size
ReflowChild(frame, aPresContext, aDesiredSize, kidReflowState, 0, 0, 0, aStatus);
// The document element's background should cover the entire canvas, so
// take into account the combined area and any space taken up by
// absolutely positioned elements
nsMargin padding(0,0,0,0);
// XXXbz this screws up percentage padding (sets padding to zero
// in the percentage padding case)
kidReflowState.mStylePadding->GetPadding(padding);
// First check the combined area
if (NS_FRAME_OUTSIDE_CHILDREN & frame->GetStateBits()) {
// The background covers the content area and padding area, so check
// for children sticking outside the child frame's padding edge
if (aDesiredSize.mOverflowArea.XMost() > aDesiredSize.width) {
mPD->mPageContentXMost =
aDesiredSize.mOverflowArea.XMost() +
kidReflowState.mStyleBorder->GetBorderWidth(NS_SIDE_RIGHT) +
padding.right;
}
}
// Place and size the child
FinishReflowChild(frame, aPresContext, &kidReflowState, aDesiredSize, 0, 0, 0);
NS_ASSERTION(!NS_FRAME_IS_COMPLETE(aStatus) ||
!frame->GetNextInFlow(), "bad child flow list");
#ifdef DEBUG_PRINTING
nsRect r = frame->GetRect();
printf("PCF: Area Frame %p Bounds: %5d,%5d,%5d,%5d\n", frame, r.x, r.y, r.width, r.height);
nsIView* view = frame->GetView();
if (view) {
r = view->GetBounds();
printf("PCF: Area Frame View Bounds: %5d,%5d,%5d,%5d\n", r.x, r.y, r.width, r.height);
} else {
printf("PCF: Area Frame View Bounds: NO VIEW\n");
}
#endif
}
// Reflow our fixed frames
mFixedContainer.Reflow(this, aPresContext, aReflowState, aReflowState.availableWidth,
aReflowState.availableHeight);
// Return our desired size
aDesiredSize.width = aReflowState.availableWidth;
if (aReflowState.availableHeight != NS_UNCONSTRAINEDSIZE) {
aDesiredSize.height = aReflowState.availableHeight;
}
}
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
return NS_OK;
}
nsIAtom*
nsPageContentFrame::GetType() const
{
return nsLayoutAtoms::pageContentFrame;
}
#ifdef DEBUG
NS_IMETHODIMP
nsPageContentFrame::GetFrameName(nsAString& aResult) const
{
return MakeFrameName(NS_LITERAL_STRING("PageContent"), aResult);
}
#endif
/* virtual */ PRBool
nsPageContentFrame::IsContainingBlock() const
{
return PR_TRUE;
}
//------------------------------------------------------------------------------
NS_IMETHODIMP
nsPageContentFrame::Paint(nsPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer,
PRUint32 aFlags)
{
aRenderingContext.PushState();
nsRect rect;
if (mClipRect.width != -1 || mClipRect.height != -1) {
rect = mClipRect;
} else {
rect = mRect;
rect.x = 0;
rect.y = 0;
}
aRenderingContext.SetClipRect(rect, nsClipCombine_kReplace);
nsresult rv = nsContainerFrame::Paint(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
#if defined(DEBUG_rods) || defined(DEBUG_dcone)
if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
nsRect r = mRect;
r.x = 0;
r.y = 0;
aRenderingContext.SetColor(NS_RGB(0, 0, 0));
aRenderingContext.DrawRect(r);
}
#endif
aRenderingContext.PopState();
return rv;
}