mirror of
https://github.com/rn10950/RetroZilla.git
synced 2024-11-10 18:00:15 +01:00
6708 lines
233 KiB
C++
6708 lines
233 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 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.org 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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* Robert O'Callahan <roc+moz@cs.cmu.edu>
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* Roger B. Sidje <rbs@maths.uq.edu.au>
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* Pierre Phaneuf <pp@ludusdesign.com>
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* Prabhat Hegde <prabhat.hegde@sun.com>
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* Tomi Leppikangas <tomi.leppikangas@oulu.fi>
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* Roland Mainz <roland.mainz@informatik.med.uni-giessen.de>
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* Daniel Glazman <glazman@netscape.com>
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* Neil Deakin <neil@mozdevgroup.com>
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* Masayuki Nakano <masayuki@d-toybox.com>
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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 "nsHTMLParts.h"
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#include "nsCRT.h"
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#include "nsSplittableFrame.h"
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#include "nsLineLayout.h"
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#include "nsString.h"
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#include "nsUnicharUtils.h"
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#include "nsPresContext.h"
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#include "nsIContent.h"
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#include "nsStyleConsts.h"
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#include "nsStyleContext.h"
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#include "nsCoord.h"
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#include "nsIFontMetrics.h"
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#include "nsIRenderingContext.h"
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#include "nsIPresShell.h"
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#include "nsIView.h"
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#include "nsIViewManager.h"
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#include "nsITimer.h"
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#include "prtime.h"
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#include "nsVoidArray.h"
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#include "prprf.h"
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#include "nsIDOMText.h"
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#include "nsIDocument.h"
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#include "nsIDeviceContext.h"
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#include "nsICaret.h"
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#include "nsCSSPseudoElements.h"
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#include "nsILineBreaker.h"
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#include "nsIWordBreaker.h"
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#include "nsCompatibility.h"
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#include "nsCSSColorUtils.h"
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|
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#include "nsITextContent.h"
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#include "nsTextFragment.h"
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#include "nsTextTransformer.h"
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#include "nsHTMLAtoms.h"
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#include "nsLayoutAtoms.h"
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#include "nsIFrameSelection.h"
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#include "nsISelection.h"
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#include "nsIDOMRange.h"
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#include "nsILookAndFeel.h"
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#include "nsCSSRendering.h"
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#include "nsContentUtils.h"
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#include "nsILineIterator.h"
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#include "nsCompressedCharMap.h"
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#include "nsIServiceManager.h"
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#ifdef ACCESSIBILITY
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#include "nsIAccessible.h"
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#include "nsIAccessibilityService.h"
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#endif
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#include "nsGUIEvent.h"
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#include "nsAutoPtr.h"
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#include "nsStyleSet.h"
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#include "nsBidiFrames.h"
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#include "nsBidiPresUtils.h"
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#include "nsBidiUtils.h"
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#ifdef SUNCTL
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#include "nsILE.h"
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static NS_DEFINE_CID(kLECID, NS_ULE_CID);
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#endif /* SUNCTL */
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#ifdef NS_DEBUG
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#undef NOISY_BLINK
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#undef DEBUG_WORD_WRAPPING
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#undef NOISY_REFLOW
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#undef NOISY_TRIM
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#else
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#undef NOISY_BLINK
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#undef DEBUG_WORD_WRAPPING
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#undef NOISY_REFLOW
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#undef NOISY_TRIM
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#endif
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// #define DEBUGWORDJUMP
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#define kSZLIG 0x00DF
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//----------------------------------------------------------------------
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#define TEXT_BUF_SIZE 100
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//----------------------------------------
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// checks to see if the text can be lightened..
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// text is darkend
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inline PRBool CanDarken(nsPresContext* aPresContext)
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{
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PRBool darken;
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if (aPresContext->GetBackgroundColorDraw()) {
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darken = PR_FALSE;
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} else {
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if (aPresContext->GetBackgroundImageDraw()) {
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darken = PR_FALSE;
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} else {
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darken = PR_TRUE;
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}
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}
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return darken;
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}
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struct nsAutoIndexBuffer {
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nsAutoIndexBuffer();
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~nsAutoIndexBuffer();
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nsresult GrowTo(PRInt32 aAtLeast);
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PRInt32* mBuffer;
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PRInt32 mBufferLen;
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PRInt32 mAutoBuffer[TEXT_BUF_SIZE];
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};
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nsAutoIndexBuffer::nsAutoIndexBuffer()
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: mBuffer(mAutoBuffer),
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mBufferLen(TEXT_BUF_SIZE)
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{
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#ifdef DEBUG
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memset(mAutoBuffer, 0xdd, sizeof(mAutoBuffer));
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#endif
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}
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nsAutoIndexBuffer::~nsAutoIndexBuffer()
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{
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if (mBuffer && (mBuffer != mAutoBuffer)) {
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delete [] mBuffer;
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}
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}
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nsresult
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nsAutoIndexBuffer::GrowTo(PRInt32 aAtLeast)
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{
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if (aAtLeast > mBufferLen)
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{
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PRInt32 newSize = mBufferLen * 2;
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if (newSize < mBufferLen + aAtLeast) {
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newSize = mBufferLen * 2 + aAtLeast;
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}
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PRInt32* newBuffer = new PRInt32[newSize];
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if (!newBuffer) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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#ifdef DEBUG
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memset(newBuffer, 0xdd, sizeof(PRInt32) * newSize);
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#endif
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memcpy(newBuffer, mBuffer, sizeof(PRInt32) * mBufferLen);
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if (mBuffer != mAutoBuffer) {
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delete [] mBuffer;
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}
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mBuffer = newBuffer;
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mBufferLen = newSize;
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}
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return NS_OK;
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}
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struct nsAutoPRUint8Buffer {
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nsAutoPRUint8Buffer();
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~nsAutoPRUint8Buffer();
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nsresult GrowTo(PRInt32 aAtLeast);
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PRUint8* mBuffer;
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PRInt32 mBufferLen;
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PRUint8 mAutoBuffer[TEXT_BUF_SIZE];
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};
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nsAutoPRUint8Buffer::nsAutoPRUint8Buffer()
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: mBuffer(mAutoBuffer),
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mBufferLen(TEXT_BUF_SIZE)
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{
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#ifdef DEBUG
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memset(mAutoBuffer, 0xdd, sizeof(mAutoBuffer));
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#endif
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}
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nsAutoPRUint8Buffer::~nsAutoPRUint8Buffer()
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{
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if (mBuffer && (mBuffer != mAutoBuffer)) {
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delete [] mBuffer;
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}
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}
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nsresult
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nsAutoPRUint8Buffer::GrowTo(PRInt32 aAtLeast)
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{
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if (aAtLeast > mBufferLen)
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{
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PRInt32 newSize = mBufferLen * 2;
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if (newSize < mBufferLen + aAtLeast) {
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newSize = mBufferLen * 2 + aAtLeast;
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}
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PRUint8* newBuffer = new PRUint8[newSize];
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if (!newBuffer) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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#ifdef DEBUG
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memset(newBuffer, 0xdd, sizeof(PRUint8) * newSize);
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#endif
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memcpy(newBuffer, mBuffer, sizeof(PRUint8) * mBufferLen);
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if (mBuffer != mAutoBuffer) {
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delete [] mBuffer;
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}
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mBuffer = newBuffer;
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mBufferLen = newSize;
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}
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return NS_OK;
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}
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//----------------------------------------------------------------------
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// Helper class for managing blinking text
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class nsBlinkTimer : public nsITimerCallback
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{
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public:
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nsBlinkTimer();
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virtual ~nsBlinkTimer();
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NS_DECL_ISUPPORTS
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void AddFrame(nsPresContext* aPresContext, nsIFrame* aFrame);
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PRBool RemoveFrame(nsIFrame* aFrame);
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PRInt32 FrameCount();
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void Start();
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void Stop();
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NS_DECL_NSITIMERCALLBACK
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static nsresult AddBlinkFrame(nsPresContext* aPresContext, nsIFrame* aFrame);
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static nsresult RemoveBlinkFrame(nsIFrame* aFrame);
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static PRBool GetBlinkIsOff() { return sState == 3; }
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protected:
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struct FrameData {
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nsPresContext* mPresContext; // pres context associated with the frame
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nsIFrame* mFrame;
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FrameData(nsPresContext* aPresContext,
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nsIFrame* aFrame)
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: mPresContext(aPresContext), mFrame(aFrame) {}
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};
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nsCOMPtr<nsITimer> mTimer;
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nsVoidArray mFrames;
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nsPresContext* mPresContext;
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protected:
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static nsBlinkTimer* sTextBlinker;
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static PRUint32 sState; // 0-2 == on; 3 == off
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};
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nsBlinkTimer* nsBlinkTimer::sTextBlinker = nsnull;
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PRUint32 nsBlinkTimer::sState = 0;
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#ifdef NOISY_BLINK
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static PRTime gLastTick;
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#endif
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nsBlinkTimer::nsBlinkTimer()
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{
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}
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nsBlinkTimer::~nsBlinkTimer()
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{
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Stop();
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sTextBlinker = nsnull;
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}
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void nsBlinkTimer::Start()
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{
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nsresult rv;
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mTimer = do_CreateInstance("@mozilla.org/timer;1", &rv);
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if (NS_OK == rv) {
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mTimer->InitWithCallback(this, 250, nsITimer::TYPE_REPEATING_PRECISE);
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}
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}
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void nsBlinkTimer::Stop()
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{
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if (nsnull != mTimer) {
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mTimer->Cancel();
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}
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}
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NS_IMPL_ISUPPORTS1(nsBlinkTimer, nsITimerCallback)
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void nsBlinkTimer::AddFrame(nsPresContext* aPresContext, nsIFrame* aFrame) {
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FrameData* frameData = new FrameData(aPresContext, aFrame);
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mFrames.AppendElement(frameData);
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if (1 == mFrames.Count()) {
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Start();
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}
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}
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PRBool nsBlinkTimer::RemoveFrame(nsIFrame* aFrame) {
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PRInt32 i, n = mFrames.Count();
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PRBool rv = PR_FALSE;
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for (i = 0; i < n; i++) {
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FrameData* frameData = (FrameData*) mFrames.ElementAt(i);
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if (frameData->mFrame == aFrame) {
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rv = mFrames.RemoveElementAt(i);
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delete frameData;
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break;
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}
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}
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if (0 == mFrames.Count()) {
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Stop();
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}
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return rv;
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}
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PRInt32 nsBlinkTimer::FrameCount() {
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return mFrames.Count();
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}
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NS_IMETHODIMP nsBlinkTimer::Notify(nsITimer *timer)
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{
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// Toggle blink state bit so that text code knows whether or not to
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// render. All text code shares the same flag so that they all blink
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// in unison.
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sState = (sState + 1) % 4;
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if (sState == 1 || sState == 2)
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// States 0, 1, and 2 are all the same.
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return NS_OK;
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#ifdef NOISY_BLINK
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PRTime now = PR_Now();
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char buf[50];
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PRTime delta;
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LL_SUB(delta, now, gLastTick);
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gLastTick = now;
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PR_snprintf(buf, sizeof(buf), "%lldusec", delta);
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printf("%s\n", buf);
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#endif
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PRInt32 i, n = mFrames.Count();
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for (i = 0; i < n; i++) {
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FrameData* frameData = (FrameData*) mFrames.ElementAt(i);
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// Determine damaged area and tell view manager to redraw it
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// blink doesn't blink outline ... I hope
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nsRect bounds(nsPoint(0, 0), frameData->mFrame->GetSize());
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frameData->mFrame->Invalidate(bounds, PR_FALSE);
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}
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return NS_OK;
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}
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// static
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nsresult nsBlinkTimer::AddBlinkFrame(nsPresContext* aPresContext, nsIFrame* aFrame)
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{
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if (!sTextBlinker)
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{
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sTextBlinker = new nsBlinkTimer;
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if (!sTextBlinker) return NS_ERROR_OUT_OF_MEMORY;
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}
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NS_ADDREF(sTextBlinker);
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sTextBlinker->AddFrame(aPresContext, aFrame);
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return NS_OK;
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}
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// static
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nsresult nsBlinkTimer::RemoveBlinkFrame(nsIFrame* aFrame)
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{
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NS_ASSERTION(sTextBlinker, "Should have blink timer here");
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nsBlinkTimer* blinkTimer = sTextBlinker; // copy so we can call NS_RELEASE on it
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if (!blinkTimer) return NS_OK;
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blinkTimer->RemoveFrame(aFrame);
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NS_RELEASE(blinkTimer);
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return NS_OK;
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}
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//----------------------------------------------------------------------
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class nsTextFrame : public nsFrame {
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public:
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nsTextFrame();
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// nsIFrame
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NS_IMETHOD Paint(nsPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer,
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|
PRUint32 aFlags);
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NS_IMETHOD Destroy(nsPresContext* aPresContext);
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NS_IMETHOD GetCursor(const nsPoint& aPoint,
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|
nsIFrame::Cursor& aCursor);
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NS_IMETHOD CharacterDataChanged(nsPresContext* aPresContext,
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|
nsIContent* aChild,
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PRBool aAppend);
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virtual nsIFrame* GetNextInFlow() const {
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return mNextInFlow;
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}
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NS_IMETHOD SetNextInFlow(nsIFrame* aNextInFlow) {
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|
mNextInFlow = aNextInFlow;
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return NS_OK;
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}
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virtual nsIFrame* GetLastInFlow() const;
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NS_IMETHOD IsSplittable(nsSplittableType& aIsSplittable) const {
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|
aIsSplittable = NS_FRAME_SPLITTABLE;
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|
return NS_OK;
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|
}
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|
|
/**
|
|
* Get the "type" of the frame
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|
*
|
|
* @see nsLayoutAtoms::textFrame
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|
*/
|
|
virtual nsIAtom* GetType() const;
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|
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|
#ifdef DEBUG
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|
NS_IMETHOD List(nsPresContext* aPresContext, FILE* out, PRInt32 aIndent) const;
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|
NS_IMETHOD GetFrameName(nsAString& aResult) const;
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|
NS_IMETHOD_(nsFrameState) GetDebugStateBits() const ;
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|
#endif
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|
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|
NS_IMETHOD GetPosition(nsPresContext* aPresContext,
|
|
const nsPoint& aPoint,
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|
nsIContent ** aNewContent,
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|
PRInt32& aContentOffset,
|
|
PRInt32& aContentOffsetEnd);
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|
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|
NS_IMETHOD GetContentAndOffsetsFromPoint(nsPresContext* aPresContext,
|
|
const nsPoint& aPoint,
|
|
nsIContent ** aNewContent,
|
|
PRInt32& aContentOffset,
|
|
PRInt32& aContentOffsetEnd,
|
|
PRBool& aBeginFrameContent);
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|
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|
NS_IMETHOD GetPositionSlowly(nsPresContext* aPresContext,
|
|
nsIRenderingContext * aRendContext,
|
|
const nsPoint& aPoint,
|
|
nsIContent ** aNewContent,
|
|
PRInt32& aOffset);
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|
|
|
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|
NS_IMETHOD SetSelected(nsPresContext* aPresContext,
|
|
nsIDOMRange *aRange,
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|
PRBool aSelected,
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|
nsSpread aSpread);
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|
NS_IMETHOD PeekOffset(nsPresContext* aPresContext, nsPeekOffsetStruct *aPos);
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|
NS_IMETHOD CheckVisibility(nsPresContext* aContext, PRInt32 aStartIndex, PRInt32 aEndIndex, PRBool aRecurse, PRBool *aFinished, PRBool *_retval);
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|
NS_IMETHOD HandleMultiplePress(nsPresContext* aPresContext,
|
|
nsGUIEvent * aEvent,
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|
nsEventStatus* aEventStatus);
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|
|
|
NS_IMETHOD GetOffsets(PRInt32 &start, PRInt32 &end)const;
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|
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|
virtual void AdjustOffsetsForBidi(PRInt32 start, PRInt32 end);
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|
NS_IMETHOD GetPointFromOffset(nsPresContext* inPresContext,
|
|
nsIRenderingContext* inRendContext,
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|
PRInt32 inOffset,
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|
nsPoint* outPoint);
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|
NS_IMETHOD GetChildFrameContainingOffset(PRInt32 inContentOffset,
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PRBool inHint,
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PRInt32* outFrameContentOffset,
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|
nsIFrame* *outChildFrame);
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|
|
|
NS_IMETHOD IsVisibleForPainting(nsPresContext * aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
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|
PRBool aCheckVis,
|
|
PRBool* aIsVisible);
|
|
|
|
virtual PRBool IsEmpty();
|
|
virtual PRBool IsSelfEmpty() { return IsEmpty(); }
|
|
|
|
#ifdef ACCESSIBILITY
|
|
NS_IMETHOD GetAccessible(nsIAccessible** aAccessible);
|
|
#endif
|
|
|
|
// nsIHTMLReflow
|
|
NS_IMETHOD Reflow(nsPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aMetrics,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus);
|
|
NS_IMETHOD CanContinueTextRun(PRBool& aContinueTextRun) const;
|
|
NS_IMETHOD AdjustFrameSize(nscoord aExtraSpace, nscoord& aUsedSpace);
|
|
NS_IMETHOD TrimTrailingWhiteSpace(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRC,
|
|
nscoord& aDeltaWidth,
|
|
PRBool& aLastCharIsJustifiable);
|
|
|
|
struct TextStyle {
|
|
const nsStyleFont* mFont;
|
|
const nsStyleText* mText;
|
|
nsIFontMetrics* mNormalFont;
|
|
nsIFontMetrics* mSmallFont;
|
|
nsIFontMetrics* mLastFont;
|
|
PRBool mSmallCaps;
|
|
nscoord mWordSpacing;
|
|
nscoord mLetterSpacing;
|
|
nscoord mSpaceWidth;
|
|
nscoord mAveCharWidth;
|
|
PRBool mJustifying;
|
|
PRBool mPreformatted;
|
|
PRInt32 mNumJustifiableCharacterToRender;
|
|
PRInt32 mNumJustifiableCharacterToMeasure;
|
|
nscoord mExtraSpacePerJustifiableCharacter;
|
|
PRInt32 mNumJustifiableCharacterReceivingExtraJot;
|
|
|
|
TextStyle(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
nsStyleContext* sc)
|
|
{
|
|
// Get style data
|
|
mFont = sc->GetStyleFont();
|
|
mText = sc->GetStyleText();
|
|
|
|
// Cache the original decorations and reuse the current font
|
|
// to query metrics, rather than creating a new font which is expensive.
|
|
nsFont* plainFont = (nsFont *)&mFont->mFont; //XXX: Change to use a CONST_CAST macro.
|
|
NS_ASSERTION(plainFont, "null plainFont: font problems in TextStyle::TextStyle");
|
|
PRUint8 originalDecorations = plainFont->decorations;
|
|
plainFont->decorations = NS_FONT_DECORATION_NONE;
|
|
mAveCharWidth = 0;
|
|
SetFontFromStyle(&aRenderingContext, sc); // some users of the struct expect this state
|
|
aRenderingContext.GetFontMetrics(mNormalFont);
|
|
mNormalFont->GetSpaceWidth(mSpaceWidth);
|
|
mNormalFont->GetAveCharWidth(mAveCharWidth);
|
|
mLastFont = mNormalFont;
|
|
|
|
// Get the small-caps font if needed
|
|
mSmallCaps = NS_STYLE_FONT_VARIANT_SMALL_CAPS == plainFont->variant;
|
|
if (mSmallCaps) {
|
|
nscoord originalSize = plainFont->size;
|
|
plainFont->size = nscoord(0.8 * plainFont->size);
|
|
mSmallFont = aPresContext->GetMetricsFor(*plainFont).get(); // addrefs
|
|
// Reset to the size value saved earlier.
|
|
plainFont->size = originalSize;
|
|
}
|
|
else {
|
|
mSmallFont = nsnull;
|
|
}
|
|
|
|
// Reset to the decoration saved earlier
|
|
plainFont->decorations = originalDecorations;
|
|
|
|
// Get the word and letter spacing
|
|
PRIntn unit = mText->mWordSpacing.GetUnit();
|
|
if (eStyleUnit_Coord == unit) {
|
|
mWordSpacing = mText->mWordSpacing.GetCoordValue();
|
|
} else {
|
|
mWordSpacing = 0;
|
|
}
|
|
|
|
unit = mText->mLetterSpacing.GetUnit();
|
|
if (eStyleUnit_Coord == unit) {
|
|
mLetterSpacing = mText->mLetterSpacing.GetCoordValue();
|
|
} else {
|
|
mLetterSpacing = 0;
|
|
}
|
|
|
|
mNumJustifiableCharacterToRender = 0;
|
|
mNumJustifiableCharacterToMeasure = 0;
|
|
mNumJustifiableCharacterReceivingExtraJot = 0;
|
|
mExtraSpacePerJustifiableCharacter = 0;
|
|
mPreformatted = (NS_STYLE_WHITESPACE_PRE == mText->mWhiteSpace) ||
|
|
(NS_STYLE_WHITESPACE_MOZ_PRE_WRAP == mText->mWhiteSpace);
|
|
|
|
mJustifying = (NS_STYLE_TEXT_ALIGN_JUSTIFY == mText->mTextAlign) &&
|
|
!mPreformatted;
|
|
}
|
|
|
|
~TextStyle() {
|
|
NS_IF_RELEASE(mNormalFont);
|
|
NS_IF_RELEASE(mSmallFont);
|
|
}
|
|
};
|
|
|
|
// Contains extra style data needed only for painting (not reflowing)
|
|
struct TextPaintStyle : TextStyle {
|
|
const nsStyleColor* mColor;
|
|
nscolor mSelectionTextColor;
|
|
nscolor mSelectionBGColor;
|
|
|
|
TextPaintStyle(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
nsStyleContext* sc)
|
|
: TextStyle(aPresContext, aRenderingContext, sc)
|
|
{
|
|
mColor = sc->GetStyleColor();
|
|
|
|
// Get colors from look&feel
|
|
mSelectionBGColor = NS_RGB(0, 0, 0);
|
|
mSelectionTextColor = NS_RGB(255, 255, 255);
|
|
nsILookAndFeel* look = aPresContext->LookAndFeel();
|
|
look->GetColor(nsILookAndFeel::eColor_TextSelectBackground,
|
|
mSelectionBGColor);
|
|
look->GetColor(nsILookAndFeel::eColor_TextSelectForeground,
|
|
mSelectionTextColor);
|
|
}
|
|
|
|
~TextPaintStyle() {
|
|
mColor = nsnull;
|
|
}
|
|
};
|
|
|
|
struct TextReflowData {
|
|
PRInt32 mX; // OUT
|
|
PRInt32 mOffset; // IN/OUT How far along we are in the content
|
|
nscoord mMaxWordWidth; // OUT
|
|
nscoord mAscent; // OUT
|
|
nscoord mDescent; // OUT
|
|
PRPackedBool mWrapping; // IN
|
|
PRPackedBool mSkipWhitespace; // IN
|
|
PRPackedBool mMeasureText; // IN
|
|
PRPackedBool mInWord; // IN
|
|
PRPackedBool mFirstLetterOK; // IN
|
|
PRPackedBool mCanBreakBefore; // IN
|
|
PRPackedBool mComputeMaxWordWidth; // IN
|
|
PRPackedBool mTrailingSpaceTrimmed; // IN/OUT
|
|
|
|
TextReflowData(PRInt32 aStartingOffset,
|
|
PRBool aWrapping,
|
|
PRBool aSkipWhitespace,
|
|
PRBool aMeasureText,
|
|
PRBool aInWord,
|
|
PRBool aFirstLetterOK,
|
|
PRBool aCanBreakBefore,
|
|
PRBool aComputeMaxWordWidth,
|
|
PRBool aTrailingSpaceTrimmed)
|
|
: mX(0),
|
|
mOffset(aStartingOffset),
|
|
mMaxWordWidth(0),
|
|
mAscent(0),
|
|
mDescent(0),
|
|
mWrapping(aWrapping),
|
|
mSkipWhitespace(aSkipWhitespace),
|
|
mMeasureText(aMeasureText),
|
|
mInWord(aInWord),
|
|
mFirstLetterOK(aFirstLetterOK),
|
|
mCanBreakBefore(aCanBreakBefore),
|
|
mComputeMaxWordWidth(aComputeMaxWordWidth),
|
|
mTrailingSpaceTrimmed(aTrailingSpaceTrimmed)
|
|
{}
|
|
};
|
|
|
|
nsIDocument* GetDocument(nsPresContext* aPresContext);
|
|
|
|
void PrepareUnicodeText(nsTextTransformer& aTransformer,
|
|
nsAutoIndexBuffer* aIndexBuffer,
|
|
nsAutoTextBuffer* aTextBuffer,
|
|
PRInt32* aTextLen,
|
|
PRBool aForceArabicShaping = PR_FALSE,
|
|
PRIntn* aJustifiableCharCount = nsnull);
|
|
void ComputeExtraJustificationSpacing(nsIRenderingContext& aRenderingContext,
|
|
TextStyle& aTextStyle,
|
|
PRUnichar* aBuffer, PRInt32 aLength, PRInt32 aNumJustifiableCharacter);
|
|
|
|
/**
|
|
* @param aRightToLeftText whether the rendering context is reversing text
|
|
* using its native right-to-left capability
|
|
*/
|
|
void PaintTextDecorations(nsIRenderingContext& aRenderingContext,
|
|
nsStyleContext* aStyleContext,
|
|
nsPresContext* aPresContext,
|
|
TextPaintStyle& aStyle,
|
|
nscoord aX, nscoord aY, nscoord aWidth,
|
|
PRBool aRightToLeftText,
|
|
PRUnichar* aText = nsnull,
|
|
SelectionDetails *aDetails = nsnull,
|
|
PRUint32 aIndex = 0,
|
|
PRUint32 aLength = 0,
|
|
const nscoord* aSpacing = nsnull);
|
|
|
|
void PaintTextSlowly(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
nsStyleContext* aStyleContext,
|
|
TextPaintStyle& aStyle,
|
|
nscoord aX, nscoord aY);
|
|
|
|
// The passed-in rendering context must have its color set to the color the
|
|
// text should be rendered in.
|
|
/**
|
|
* @param aRightToLeftText whether the rendering context is reversing text
|
|
* using its native right-to-left capability
|
|
*/
|
|
void RenderString(nsIRenderingContext& aRenderingContext,
|
|
nsStyleContext* aStyleContext,
|
|
nsPresContext* aPresContext,
|
|
TextPaintStyle& aStyle,
|
|
PRBool aRightToLeftText,
|
|
PRUnichar* aBuffer, PRInt32 aLength, PRBool aIsEndOfFrame,
|
|
nscoord aX, nscoord aY,
|
|
nscoord aWidth,
|
|
SelectionDetails *aDetails = nsnull);
|
|
|
|
void MeasureSmallCapsText(const nsHTMLReflowState& aReflowState,
|
|
TextStyle& aStyle,
|
|
PRUnichar* aWord,
|
|
PRInt32 aWordLength,
|
|
PRBool aIsEndOfFrame,
|
|
nsTextDimensions* aDimensionsResult);
|
|
|
|
PRUint32 EstimateNumChars(PRUint32 aAvailableWidth,
|
|
PRUint32 aAverageCharWidth);
|
|
|
|
nsReflowStatus MeasureText(nsPresContext* aPresContext,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsTextTransformer& aTx,
|
|
nsILineBreaker* aLb,
|
|
TextStyle& aTs,
|
|
TextReflowData& aTextData);
|
|
|
|
void GetTextDimensions(nsIRenderingContext& aRenderingContext,
|
|
TextStyle& aStyle,
|
|
PRUnichar* aBuffer, PRInt32 aLength, PRBool aIsEndOfFrame,
|
|
nsTextDimensions* aDimensionsResult);
|
|
|
|
//this returns the index into the PAINTBUFFER of the x coord aWidth(based on 0 as far left)
|
|
//also note: this is NOT added to mContentOffset since that would imply that this return is
|
|
//meaningful to content yet. use index buffer from prepareunicodestring to find the content offset.
|
|
PRInt32 GetLengthSlowly(nsIRenderingContext& aRenderingContext,
|
|
TextStyle& aStyle,
|
|
PRUnichar* aBuffer, PRInt32 aLength, PRBool aIsEndOfFrame,
|
|
nscoord aWidth);
|
|
|
|
PRBool IsTextInSelection(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext);
|
|
|
|
nsresult GetTextInfoForPainting(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
nsIPresShell** aPresShell,
|
|
nsISelectionController** aSelectionController,
|
|
PRBool& aDisplayingSelection,
|
|
PRBool& aIsPaginated,
|
|
PRBool& aIsSelected,
|
|
PRBool& aHideStandardSelection,
|
|
PRInt16& aSelectionValue,
|
|
nsILineBreaker** aLineBreaker);
|
|
|
|
void PaintUnicodeText(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
nsStyleContext* aStyleContext,
|
|
TextPaintStyle& aStyle,
|
|
nscoord dx, nscoord dy);
|
|
|
|
void PaintAsciiText(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
nsStyleContext* aStyleContext,
|
|
TextPaintStyle& aStyle,
|
|
nscoord dx, nscoord dy);
|
|
|
|
/**
|
|
* ComputeTotalWordDimensions and ComputeWordFragmentDimensions work
|
|
* together to measure a text that spans multiple frames, e.g., as in
|
|
* "baseText<b>moreText<i>moreDeepText</i></b>moreAlsoHere"
|
|
* where the total text shoudn't be broken (or the joined pieces should be
|
|
* passed to the linebreaker for examination, especially in i18n cases).
|
|
*
|
|
* ComputeTotalWordDimensions will loop over ComputeWordFragmentDimensions
|
|
* to look-ahead and accumulate the joining fragments.
|
|
*
|
|
* @param aNextFrame is the first textFrame after the baseText's textFrame.
|
|
*
|
|
* @param aBaseDimensions is the dimension of baseText.
|
|
*
|
|
* @param aCanBreakBefore is false when it is not possible to break before
|
|
* the baseText (e.g., when this is the first word on the line).
|
|
*/
|
|
nsTextDimensions ComputeTotalWordDimensions(nsPresContext* aPresContext,
|
|
nsILineBreaker* aLineBreaker,
|
|
nsLineLayout& aLineLayout,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsIFrame* aNextFrame,
|
|
const nsTextDimensions& aBaseDimensions,
|
|
PRUnichar* aWordBuf,
|
|
PRUint32 aWordBufLen,
|
|
PRUint32 aWordBufSize,
|
|
PRBool aCanBreakBefore);
|
|
|
|
/**
|
|
* @param aNextFrame is the textFrame following the current fragment.
|
|
*
|
|
* @param aMoreSize plays a double role. The process should continue
|
|
* normally when it is zero. But when it returns -1, it means that there is
|
|
* no more fragment of interest and the look-ahead should be stopped. When
|
|
* it returns a positive value, it means that the current buffer (aWordBuf
|
|
* of size aWordBufSize) is not big enough to accumulate the current fragment.
|
|
* The returned positive value is the shortfall.
|
|
*
|
|
* @param aWordBufLen is the accumulated length of the fragments that have
|
|
* been accounted for so far.
|
|
*/
|
|
nsTextDimensions ComputeWordFragmentDimensions(nsPresContext* aPresContext,
|
|
nsILineBreaker* aLineBreaker,
|
|
nsLineLayout& aLineLayout,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsIFrame* aNextFrame,
|
|
nsIContent* aContent,
|
|
nsITextContent* aText,
|
|
PRInt32* aMoreSize,
|
|
const PRUnichar* aWordBuf,
|
|
PRUint32 &aWordBufLen,
|
|
PRUint32 aWordBufSize,
|
|
PRBool aCanBreakBefore);
|
|
|
|
#ifdef DEBUG
|
|
void ToCString(nsString& aBuf, PRInt32* aTotalContentLength) const;
|
|
#endif
|
|
|
|
protected:
|
|
virtual ~nsTextFrame();
|
|
|
|
nsIFrame* mNextInFlow;
|
|
PRInt32 mContentOffset;
|
|
PRInt32 mContentLength;
|
|
PRInt32 mColumn;
|
|
nscoord mAscent;
|
|
//factored out method for GetTextDimensions and getlengthslowly. if aGetTextDimensions is non-zero number then measure to the width field and return the length. else shove total dimensions into result
|
|
PRInt32 GetTextDimensionsOrLength(nsIRenderingContext& aRenderingContext,
|
|
TextStyle& aStyle,
|
|
PRUnichar* aBuffer, PRInt32 aLength, PRBool aIsEndOfFrame,
|
|
nsTextDimensions* aDimensionsResult,
|
|
PRBool aGetTextDimensions/* true=get dimensions false = return length up to aDimensionsResult->width size*/);
|
|
nsresult GetContentAndOffsetsForSelection(nsPresContext* aPresContext,nsIContent **aContent, PRInt32 *aOffset, PRInt32 *aLength);
|
|
|
|
void AdjustSelectionPointsForBidi(SelectionDetails *sdptr,
|
|
PRInt32 textLength,
|
|
PRBool isRTLChars,
|
|
PRBool isOddLevel,
|
|
PRBool isBidiSystem);
|
|
|
|
void SetOffsets(PRInt32 start, PRInt32 end);
|
|
|
|
PRBool IsChineseJapaneseLangGroup();
|
|
PRBool IsJustifiableCharacter(PRUnichar aChar, PRBool aLangIsCJ);
|
|
|
|
nsresult FillClusterBuffer(nsPresContext *aPresContext, const PRUnichar *aText,
|
|
PRUint32 aLength, nsAutoPRUint8Buffer& aClusterBuffer);
|
|
};
|
|
|
|
#ifdef ACCESSIBILITY
|
|
NS_IMETHODIMP nsTextFrame::GetAccessible(nsIAccessible** aAccessible)
|
|
{
|
|
if (mRect.width > 0 || mRect.height > 0 || GetNextInFlow()) {
|
|
|
|
nsCOMPtr<nsIAccessibilityService> accService = do_GetService("@mozilla.org/accessibilityService;1");
|
|
|
|
if (accService) {
|
|
return accService->CreateHTMLTextAccessible(NS_STATIC_CAST(nsIFrame*, this), aAccessible);
|
|
}
|
|
}
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
#endif
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
NS_IMETHODIMP
|
|
nsTextFrame::Destroy(nsPresContext* aPresContext)
|
|
{
|
|
if (mNextInFlow) {
|
|
mNextInFlow->SetPrevInFlow(nsnull);
|
|
}
|
|
// Let the base class destroy the frame
|
|
return nsFrame::Destroy(aPresContext);
|
|
}
|
|
|
|
class nsContinuingTextFrame : public nsTextFrame {
|
|
public:
|
|
NS_IMETHOD Init(nsPresContext* aPresContext,
|
|
nsIContent* aContent,
|
|
nsIFrame* aParent,
|
|
nsStyleContext* aContext,
|
|
nsIFrame* aPrevInFlow);
|
|
|
|
NS_IMETHOD Destroy(nsPresContext* aPresContext);
|
|
|
|
virtual nsIFrame* GetPrevInFlow() const {
|
|
return mPrevInFlow;
|
|
}
|
|
NS_IMETHOD SetPrevInFlow(nsIFrame* aPrevInFlow) {
|
|
mPrevInFlow = aPrevInFlow;
|
|
return NS_OK;
|
|
}
|
|
virtual nsIFrame* GetFirstInFlow() const;
|
|
|
|
protected:
|
|
nsIFrame* mPrevInFlow;
|
|
};
|
|
|
|
NS_IMETHODIMP
|
|
nsContinuingTextFrame::Init(nsPresContext* aPresContext,
|
|
nsIContent* aContent,
|
|
nsIFrame* aParent,
|
|
nsStyleContext* aContext,
|
|
nsIFrame* aPrevInFlow)
|
|
{
|
|
NS_PRECONDITION(aContent->IsContentOfType(nsIContent::eTEXT),
|
|
"Bogus content!");
|
|
|
|
nsresult rv;
|
|
|
|
rv = nsTextFrame::Init(aPresContext, aContent, aParent, aContext, aPrevInFlow);
|
|
|
|
if (aPrevInFlow) {
|
|
// Hook the frame into the flow
|
|
mPrevInFlow = aPrevInFlow;
|
|
aPrevInFlow->SetNextInFlow(this);
|
|
#ifdef IBMBIDI
|
|
if (aPrevInFlow->GetStateBits() & NS_FRAME_IS_BIDI) {
|
|
PRInt32 start, end;
|
|
aPrevInFlow->GetOffsets(start, mContentOffset);
|
|
|
|
nsPropertyTable *propTable = aPresContext->PropertyTable();
|
|
propTable->SetProperty(this, nsLayoutAtoms::embeddingLevel,
|
|
propTable->GetProperty(aPrevInFlow, nsLayoutAtoms::embeddingLevel),
|
|
nsnull, nsnull);
|
|
propTable->SetProperty(this, nsLayoutAtoms::baseLevel,
|
|
propTable->GetProperty(aPrevInFlow, nsLayoutAtoms::baseLevel),
|
|
nsnull, nsnull);
|
|
propTable->SetProperty(this, nsLayoutAtoms::charType,
|
|
propTable->GetProperty(aPrevInFlow, nsLayoutAtoms::charType),
|
|
nsnull, nsnull);
|
|
|
|
void* value = propTable->GetProperty(aPrevInFlow,
|
|
nsLayoutAtoms::nextBidi);
|
|
if (value) { // nextBidi
|
|
// aPrevInFlow and this frame will point to the same next bidi frame.
|
|
propTable->SetProperty(this, nsLayoutAtoms::nextBidi,
|
|
value, nsnull, nsnull);
|
|
|
|
( (nsIFrame*) value)->GetOffsets(start, end);
|
|
mContentLength = PR_MAX(1, start - mContentOffset);
|
|
} // value
|
|
mState |= NS_FRAME_IS_BIDI;
|
|
} // prev frame is bidi
|
|
#endif // IBMBIDI
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsContinuingTextFrame::Destroy(nsPresContext* aPresContext)
|
|
{
|
|
if (mPrevInFlow || mNextInFlow) {
|
|
nsSplittableFrame::RemoveFromFlow(this);
|
|
}
|
|
// Let the base class destroy the frame
|
|
return nsFrame::Destroy(aPresContext);
|
|
}
|
|
|
|
nsIFrame*
|
|
nsContinuingTextFrame::GetFirstInFlow() const
|
|
{
|
|
// Can't cast to |nsContinuingTextFrame*| because the first one isn't.
|
|
nsIFrame *firstInFlow,
|
|
*previous = NS_CONST_CAST(nsIFrame*,
|
|
NS_STATIC_CAST(const nsIFrame*, this));
|
|
do {
|
|
firstInFlow = previous;
|
|
previous = firstInFlow->GetPrevInFlow();
|
|
} while (previous);
|
|
return firstInFlow;
|
|
}
|
|
|
|
inline nscolor EnsureDifferentColors(nscolor colorA, nscolor colorB)
|
|
{
|
|
if (colorA == colorB)
|
|
{
|
|
nscolor res;
|
|
res = NS_RGB(NS_GET_R(colorA) ^ 0xff,
|
|
NS_GET_G(colorA) ^ 0xff,
|
|
NS_GET_B(colorA) ^ 0xff);
|
|
return res;
|
|
}
|
|
return colorA;
|
|
}
|
|
|
|
|
|
//DRAW SELECTION ITERATOR USED FOR TEXTFRAMES ONLY
|
|
//helper class for drawing multiply selected text
|
|
class DrawSelectionIterator
|
|
{
|
|
enum {SELECTION_TYPES_WE_CARE_ABOUT=nsISelectionController::SELECTION_NONE+nsISelectionController::SELECTION_NORMAL};
|
|
public:
|
|
DrawSelectionIterator(nsIContent *aContent, const SelectionDetails *aSelDetails, PRUnichar *aText,
|
|
PRUint32 aTextLength, nsTextFrame::TextPaintStyle &aTextStyle,
|
|
PRInt16 aSelectionStatus, nsPresContext *aPresContext,
|
|
nsStyleContext *aStyleContext);
|
|
~DrawSelectionIterator();
|
|
PRBool First();
|
|
PRBool Next();
|
|
PRBool IsDone();
|
|
PRBool IsLast();
|
|
|
|
PRUnichar * CurrentTextUnicharPtr();
|
|
char * CurrentTextCStrPtr();
|
|
PRUint32 CurrentLength();
|
|
nsTextFrame::TextPaintStyle & CurrentStyle();
|
|
PRBool IsBeforeOrAfter();
|
|
|
|
/**
|
|
* Get foreground color, background color, whether the background is transparent,
|
|
* and whether the current range is the normal selection.
|
|
*
|
|
* @param aForeColor [out] returns the foreground color of the current range.
|
|
* @param aBackColor [out] returns the background color of the current range.
|
|
* Note that this value is undefined if aBackIsTransparent
|
|
* is true or if @return is false.
|
|
* @param aBackIsTransparent [out] returns whether the background is transparent.
|
|
* If true, the background is transparent.
|
|
* Otherwise, it isn't so.
|
|
* @return whether the current range is a normal selection.
|
|
*/
|
|
PRBool GetSelectionColors(nscolor *aForeColor, nscolor *aBackColor, PRBool *aBackIsTransparent);
|
|
private:
|
|
union {
|
|
PRUnichar *mUniStr;
|
|
char *mCStr;
|
|
};
|
|
PRUint32 mLength;
|
|
PRUint32 mCurrentIdx;
|
|
PRUint32 mCurrentLength;
|
|
nsTextFrame::TextPaintStyle &mOldStyle;//base new styles on this one???
|
|
const SelectionDetails *mDetails;
|
|
PRBool mDone;
|
|
PRUint8 * mTypes;
|
|
PRBool mInit;
|
|
PRInt16 mSelectionStatus;//see nsIDocument.h SetDisplaySelection()
|
|
nscolor mFrameBackgroundColor;
|
|
PRInt32 mSufficientContrast;
|
|
nscolor mDisabledColor;
|
|
nscolor mAttentionColor;
|
|
|
|
PRBool mSelectionPseudoStyle;
|
|
nscolor mSelectionPseudoFGcolor;
|
|
nscolor mSelectionPseudoBGcolor;
|
|
PRBool mSelectionPseudoBGIsTransparent;
|
|
//private methods
|
|
void FillCurrentData();
|
|
};
|
|
|
|
DrawSelectionIterator::DrawSelectionIterator(nsIContent *aContent,
|
|
const SelectionDetails *aSelDetails,
|
|
PRUnichar *aText,
|
|
PRUint32 aTextLength,
|
|
nsTextFrame::TextPaintStyle &aTextStyle,
|
|
PRInt16 aSelectionStatus,
|
|
nsPresContext *aPresContext,
|
|
nsStyleContext *aStyleContext)
|
|
:mOldStyle(aTextStyle)
|
|
{
|
|
mDetails = aSelDetails;
|
|
mCurrentIdx = 0;
|
|
mUniStr = aText;
|
|
mLength = aTextLength;
|
|
mTypes = nsnull;
|
|
mInit = PR_FALSE;
|
|
mSelectionStatus = aSelectionStatus;
|
|
mSelectionPseudoStyle = PR_FALSE;
|
|
mSelectionPseudoBGIsTransparent = PR_FALSE;
|
|
|
|
const nsStyleBackground* bg =
|
|
nsCSSRendering::FindNonTransparentBackground(aStyleContext);
|
|
NS_ASSERTION(bg, "Cannot find NonTransparentBackground.");
|
|
mFrameBackgroundColor = bg->mBackgroundColor;
|
|
|
|
if (aContent) {
|
|
nsRefPtr<nsStyleContext> sc;
|
|
sc = aPresContext->StyleSet()->
|
|
ProbePseudoStyleFor(aContent->GetParent(),
|
|
nsCSSPseudoElements::mozSelection, aStyleContext);
|
|
if (sc) {
|
|
mSelectionPseudoStyle = PR_TRUE;
|
|
bg = sc->GetStyleBackground();
|
|
mSelectionPseudoBGIsTransparent = PRBool(bg->mBackgroundFlags & NS_STYLE_BG_COLOR_TRANSPARENT);
|
|
if (!mSelectionPseudoBGIsTransparent )
|
|
mSelectionPseudoBGcolor = bg->mBackgroundColor;
|
|
mSelectionPseudoFGcolor = sc->GetStyleColor()->mColor;
|
|
}
|
|
}
|
|
|
|
// Get background colors for disabled selection at attention-getting selection (used with type ahead find)
|
|
nsILookAndFeel *look = aPresContext->LookAndFeel();
|
|
nscolor defaultWindowBackgroundColor;
|
|
look->GetColor(nsILookAndFeel::eColor_WindowBackground,
|
|
defaultWindowBackgroundColor);
|
|
look->GetColor(nsILookAndFeel::eColor_TextSelectBackgroundAttention,
|
|
mAttentionColor);
|
|
look->GetColor(nsILookAndFeel::eColor_TextSelectBackgroundDisabled,
|
|
mDisabledColor);
|
|
mDisabledColor = EnsureDifferentColors(mDisabledColor,
|
|
mOldStyle.mSelectionBGColor);
|
|
mAttentionColor = EnsureDifferentColors(mAttentionColor,
|
|
mOldStyle.mSelectionBGColor);
|
|
|
|
mSufficientContrast =
|
|
PR_MIN(PR_MIN(NS_SUFFICIENT_LUMINOSITY_DIFFERENCE,
|
|
NS_LUMINOSITY_DIFFERENCE(mOldStyle.mSelectionTextColor,
|
|
mOldStyle.mSelectionBGColor)),
|
|
NS_LUMINOSITY_DIFFERENCE(defaultWindowBackgroundColor,
|
|
mOldStyle.mSelectionBGColor));
|
|
|
|
if (!aSelDetails)
|
|
{
|
|
mDone = PR_TRUE;
|
|
return;
|
|
}
|
|
mDone = (PRBool)(mCurrentIdx>=mLength);
|
|
if (mDone)
|
|
return;
|
|
|
|
//special case for 1 selection. later
|
|
const SelectionDetails *details = aSelDetails;
|
|
if (details->mNext)
|
|
{
|
|
mTypes = new PRUint8[mLength];
|
|
if (!mTypes)
|
|
return;
|
|
memset(mTypes,0,mLength);//initialize to 0
|
|
while (details)
|
|
{
|
|
if ((details->mType & SELECTION_TYPES_WE_CARE_ABOUT ) &&
|
|
(details->mStart != details->mEnd))
|
|
{
|
|
mInit = PR_TRUE;//WE FOUND SOMETHING WE CARE ABOUT
|
|
for (int i = details->mStart; i < details->mEnd; i++)
|
|
{
|
|
if ((PRUint32)i>=mLength)
|
|
{
|
|
NS_ASSERTION(0,"Selection Details out of range?");
|
|
return;//eh
|
|
}
|
|
mTypes[i]|=details->mType;//add this bit
|
|
}
|
|
}
|
|
details= details->mNext;
|
|
}
|
|
if (!mInit && mTypes) //we have details but none that we care about.
|
|
{
|
|
delete [] mTypes;
|
|
mTypes = nsnull;
|
|
mDone = PR_TRUE;//we are finished
|
|
}
|
|
}
|
|
else if (details->mStart == details->mEnd)//no collapsed selections here!
|
|
{
|
|
mDone = PR_TRUE;
|
|
return;
|
|
}
|
|
else if (!(details->mType & SELECTION_TYPES_WE_CARE_ABOUT ))//if all we have is selection we DONT care about, do nothing
|
|
{
|
|
mDone = PR_TRUE;
|
|
return;
|
|
}
|
|
mInit = PR_TRUE;
|
|
}
|
|
|
|
DrawSelectionIterator::~DrawSelectionIterator()
|
|
{
|
|
if (mTypes)
|
|
delete [] mTypes;
|
|
}
|
|
|
|
void
|
|
DrawSelectionIterator::FillCurrentData()
|
|
{
|
|
if (mDone)
|
|
return;
|
|
mCurrentIdx += mCurrentLength; // advance to this chunk
|
|
mCurrentLength = 0;
|
|
if (mCurrentIdx >= mLength)
|
|
{
|
|
mDone = PR_TRUE;
|
|
return;
|
|
}
|
|
if (!mTypes)
|
|
{
|
|
if (mCurrentIdx < (PRUint32)mDetails->mStart)
|
|
{
|
|
mCurrentLength = mDetails->mStart;
|
|
}
|
|
else if (mCurrentIdx == (PRUint32)mDetails->mStart)
|
|
{//start
|
|
mCurrentLength = mDetails->mEnd-mCurrentIdx;
|
|
}
|
|
else if (mCurrentIdx > (PRUint32)mDetails->mStart)//last unselected part
|
|
{
|
|
mCurrentLength = mLength - mDetails->mEnd;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
uint8 typevalue = mTypes[mCurrentIdx];
|
|
while (mCurrentIdx+mCurrentLength < mLength && typevalue == mTypes[mCurrentIdx+mCurrentLength])
|
|
{
|
|
mCurrentLength++;
|
|
}
|
|
}
|
|
// never overrun past mLength
|
|
if (mCurrentIdx+mCurrentLength > mLength)
|
|
{
|
|
mCurrentLength = mLength - mCurrentIdx;
|
|
}
|
|
}
|
|
|
|
PRBool
|
|
DrawSelectionIterator::First()
|
|
{
|
|
if (!mInit)
|
|
return PR_FALSE;
|
|
mCurrentIdx = 0;
|
|
mCurrentLength = 0;
|
|
if (!mTypes && mDetails->mStart == mDetails->mEnd)//no collapsed selections here!
|
|
mDone = PR_TRUE;
|
|
mDone = (mCurrentIdx+mCurrentLength) >= mLength;
|
|
FillCurrentData();
|
|
return PR_TRUE;
|
|
}
|
|
|
|
|
|
|
|
PRBool
|
|
DrawSelectionIterator::Next()
|
|
{
|
|
if (mDone || !mInit)
|
|
return PR_FALSE;
|
|
FillCurrentData();//advances to next chunk
|
|
return PR_TRUE;
|
|
}
|
|
|
|
PRBool
|
|
DrawSelectionIterator::IsLast()
|
|
{
|
|
return mDone || !mInit || mCurrentIdx + mCurrentLength >= mLength;
|
|
}
|
|
|
|
PRBool
|
|
DrawSelectionIterator::IsDone()
|
|
{
|
|
return mDone || !mInit;
|
|
}
|
|
|
|
|
|
PRUnichar *
|
|
DrawSelectionIterator::CurrentTextUnicharPtr()
|
|
{
|
|
return mUniStr+mCurrentIdx;
|
|
}
|
|
|
|
char *
|
|
DrawSelectionIterator::CurrentTextCStrPtr()
|
|
{
|
|
return mCStr+mCurrentIdx;
|
|
}
|
|
|
|
PRUint32
|
|
DrawSelectionIterator::CurrentLength()
|
|
{
|
|
return mCurrentLength;
|
|
}
|
|
|
|
nsTextFrame::TextPaintStyle &
|
|
DrawSelectionIterator::CurrentStyle()
|
|
{
|
|
return mOldStyle;
|
|
}
|
|
|
|
PRBool
|
|
DrawSelectionIterator::GetSelectionColors(nscolor *aForeColor,
|
|
nscolor *aBackColor,
|
|
PRBool *aBackIsTransparent)
|
|
{
|
|
*aBackIsTransparent = PR_FALSE;
|
|
PRBool isSelection =
|
|
(mTypes && (mTypes[mCurrentIdx] & nsISelectionController::SELECTION_NORMAL)) ||
|
|
(!mTypes && mCurrentIdx == (PRUint32)mDetails->mStart);
|
|
if (!isSelection) {
|
|
*aForeColor = mOldStyle.mColor->mColor;
|
|
return PR_FALSE;
|
|
}
|
|
|
|
if (mSelectionPseudoStyle &&
|
|
mSelectionStatus == nsISelectionController::SELECTION_ON) {
|
|
*aForeColor = mSelectionPseudoFGcolor;
|
|
*aBackColor = mSelectionPseudoBGcolor;
|
|
*aBackIsTransparent = mSelectionPseudoBGIsTransparent;
|
|
return PR_TRUE;
|
|
}
|
|
|
|
PRBool dontChangeTextColor =
|
|
mOldStyle.mSelectionTextColor == NS_DONT_CHANGE_COLOR;
|
|
|
|
if (dontChangeTextColor)
|
|
*aForeColor = mOldStyle.mColor->mColor;
|
|
else
|
|
*aForeColor = mOldStyle.mSelectionTextColor;
|
|
|
|
if (mSelectionStatus == nsISelectionController::SELECTION_ATTENTION)
|
|
*aBackColor = mAttentionColor;
|
|
else if (mSelectionStatus != nsISelectionController::SELECTION_ON)
|
|
*aBackColor = mDisabledColor;
|
|
else
|
|
*aBackColor = mOldStyle.mSelectionBGColor;
|
|
|
|
// We don't support selection color exchanging when selection text color is
|
|
// NS_DONT_CHANGE_COLOR. Because the text color should not be background color.
|
|
if (dontChangeTextColor) {
|
|
*aForeColor = EnsureDifferentColors(*aForeColor, *aBackColor);
|
|
return PR_TRUE;
|
|
}
|
|
|
|
// If the combination of selection background color and frame background color
|
|
// is sufficient contrast, don't exchange the selection colors.
|
|
PRInt32 backLuminosityDifference =
|
|
NS_LUMINOSITY_DIFFERENCE(*aBackColor, mFrameBackgroundColor);
|
|
if (backLuminosityDifference >= mSufficientContrast)
|
|
return PR_TRUE;
|
|
|
|
// Otherwise, we should use the higher-contrast color for the selection
|
|
// background color.
|
|
PRInt32 foreLuminosityDifference =
|
|
NS_LUMINOSITY_DIFFERENCE(*aForeColor, mFrameBackgroundColor);
|
|
if (backLuminosityDifference < foreLuminosityDifference) {
|
|
nscolor tmpColor = *aForeColor;
|
|
*aForeColor = *aBackColor;
|
|
*aBackColor = tmpColor;
|
|
}
|
|
return PR_TRUE;
|
|
}
|
|
|
|
PRBool
|
|
DrawSelectionIterator::IsBeforeOrAfter()
|
|
{
|
|
return mCurrentIdx != (PRUint32)mDetails->mStart;
|
|
}
|
|
|
|
//END DRAWSELECTIONITERATOR!!
|
|
|
|
|
|
|
|
|
|
// Flag information used by rendering code. This information is
|
|
// computed by the ResizeReflow code. The flags are stored in the
|
|
// mState variable in the frame class private section.
|
|
|
|
// Flag indicating that whitespace was skipped
|
|
#define TEXT_SKIP_LEADING_WS 0x01000000
|
|
#define TEXT_HAS_MULTIBYTE 0x02000000
|
|
#define TEXT_IN_WORD 0x04000000
|
|
// This bit is set on the first frame in a continuation indicating
|
|
// that it was chopped short because of :first-letter style.
|
|
#define TEXT_FIRST_LETTER 0x08000000
|
|
#define TEXT_WAS_TRANSFORMED 0x10000000
|
|
|
|
// Bits in mState used for reflow flags
|
|
#define TEXT_REFLOW_FLAGS 0x1F000000
|
|
|
|
#define TEXT_TRIMMED_WS 0x20000000
|
|
|
|
#define TEXT_OPTIMIZE_RESIZE 0x40000000
|
|
|
|
#define TEXT_BLINK_ON 0x80000000
|
|
|
|
#define TEXT_IS_ONLY_WHITESPACE 0x00100000
|
|
|
|
#define TEXT_ISNOT_ONLY_WHITESPACE 0x00200000
|
|
|
|
#define TEXT_WHITESPACE_FLAGS 0x00300000
|
|
|
|
#define TEXT_IS_END_OF_LINE 0x00400000
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
#if defined(DEBUG_rbs) || defined(DEBUG_bzbarsky)
|
|
static void
|
|
VerifyNotDirty(nsFrameState state)
|
|
{
|
|
PRBool isZero = state & NS_FRAME_FIRST_REFLOW;
|
|
PRBool isDirty = state & NS_FRAME_IS_DIRTY;
|
|
if (!isZero && isDirty)
|
|
NS_WARNING("internal offsets may be out-of-sync");
|
|
}
|
|
#define DEBUG_VERIFY_NOT_DIRTY(state) \
|
|
VerifyNotDirty(state)
|
|
#else
|
|
#define DEBUG_VERIFY_NOT_DIRTY(state)
|
|
#endif
|
|
|
|
nsresult
|
|
NS_NewTextFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
|
|
{
|
|
NS_PRECONDITION(aNewFrame, "null OUT ptr");
|
|
if (nsnull == aNewFrame) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
nsTextFrame* it = new (aPresShell) nsTextFrame;
|
|
if (nsnull == it) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
*aNewFrame = it;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
NS_NewContinuingTextFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
|
|
{
|
|
NS_PRECONDITION(aNewFrame, "null OUT ptr");
|
|
if (nsnull == aNewFrame) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
nsContinuingTextFrame* it = new (aPresShell) nsContinuingTextFrame;
|
|
if (nsnull == it) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
*aNewFrame = it;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsTextFrame::nsTextFrame()
|
|
{
|
|
}
|
|
|
|
nsTextFrame::~nsTextFrame()
|
|
{
|
|
if (0 != (mState & TEXT_BLINK_ON))
|
|
{
|
|
nsBlinkTimer::RemoveBlinkFrame(this);
|
|
}
|
|
}
|
|
|
|
nsIDocument*
|
|
nsTextFrame::GetDocument(nsPresContext* aPresContext)
|
|
{
|
|
nsIDocument *result = nsnull;
|
|
if (mContent) {
|
|
result = mContent->GetDocument();
|
|
}
|
|
if (!result && aPresContext) {
|
|
result = aPresContext->PresShell()->GetDocument();
|
|
}
|
|
return result;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::GetCursor(const nsPoint& aPoint,
|
|
nsIFrame::Cursor& aCursor)
|
|
{
|
|
FillCursorInformationFromStyle(GetStyleUserInterface(), aCursor);
|
|
if (NS_STYLE_CURSOR_AUTO == aCursor.mCursor) {
|
|
aCursor.mCursor = NS_STYLE_CURSOR_TEXT;
|
|
|
|
// If tabindex >= 0, use default cursor to indicate it's not selectable
|
|
nsIFrame *ancestorFrame = this;
|
|
while ((ancestorFrame = ancestorFrame->GetParent()) != nsnull) {
|
|
nsIContent *ancestorContent = ancestorFrame->GetContent();
|
|
if (ancestorContent && ancestorContent->HasAttr(kNameSpaceID_None, nsHTMLAtoms::tabindex)) {
|
|
nsAutoString tabIndexStr;
|
|
ancestorContent->GetAttr(kNameSpaceID_None, nsHTMLAtoms::tabindex, tabIndexStr);
|
|
if (!tabIndexStr.IsEmpty()) {
|
|
PRInt32 rv, tabIndexVal = tabIndexStr.ToInteger(&rv);
|
|
if (NS_SUCCEEDED(rv) && tabIndexVal >= 0) {
|
|
aCursor.mCursor = NS_STYLE_CURSOR_DEFAULT;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsIFrame*
|
|
nsTextFrame::GetLastInFlow() const
|
|
{
|
|
nsTextFrame* lastInFlow = (nsTextFrame*)this;
|
|
while (lastInFlow->mNextInFlow) {
|
|
lastInFlow = (nsTextFrame*)lastInFlow->mNextInFlow;
|
|
}
|
|
NS_POSTCONDITION(lastInFlow, "illegal state in flow chain.");
|
|
return lastInFlow;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::CharacterDataChanged(nsPresContext* aPresContext,
|
|
nsIContent* aChild,
|
|
PRBool aAppend)
|
|
{
|
|
nsIFrame* targetTextFrame = this;
|
|
|
|
PRBool markAllDirty = PR_TRUE;
|
|
if (aAppend) {
|
|
markAllDirty = PR_FALSE;
|
|
nsTextFrame* frame = (nsTextFrame*)GetLastInFlow();
|
|
frame->mState &= ~TEXT_WHITESPACE_FLAGS;
|
|
frame->mState |= NS_FRAME_IS_DIRTY;
|
|
targetTextFrame = frame;
|
|
}
|
|
|
|
if (markAllDirty) {
|
|
// Mark this frame and all the next-in-flow frames as dirty
|
|
nsTextFrame* textFrame = this;
|
|
nsPropertyTable *propTable = aPresContext->PropertyTable();
|
|
while (textFrame) {
|
|
textFrame->mState &= ~TEXT_WHITESPACE_FLAGS;
|
|
textFrame->mState |= NS_FRAME_IS_DIRTY;
|
|
#ifdef IBMBIDI
|
|
void* nextBidiFrame;
|
|
if ((textFrame->mState & NS_FRAME_IS_BIDI) &&
|
|
(nextBidiFrame = propTable->GetProperty(textFrame, nsLayoutAtoms::nextBidi)))
|
|
textFrame = (nsTextFrame*)nextBidiFrame;
|
|
else
|
|
#endif
|
|
textFrame = (nsTextFrame*)textFrame->mNextInFlow;
|
|
}
|
|
}
|
|
|
|
// Ask the parent frame to reflow me.
|
|
nsIPresShell *shell = aPresContext->GetPresShell();
|
|
if (shell && mParent) {
|
|
mParent->ReflowDirtyChild(shell, targetTextFrame);
|
|
}
|
|
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::Paint(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
const nsRect& aDirtyRect,
|
|
nsFramePaintLayer aWhichLayer,
|
|
PRUint32 aFlags)
|
|
{
|
|
if (NS_FRAME_PAINT_LAYER_FOREGROUND != aWhichLayer) {
|
|
return NS_OK;
|
|
}
|
|
if ((0 != (mState & TEXT_BLINK_ON)) && nsBlinkTimer::GetBlinkIsOff()) {
|
|
return NS_OK;
|
|
}
|
|
nsStyleContext* sc = mStyleContext;
|
|
PRBool isVisible;
|
|
if (NS_SUCCEEDED(IsVisibleForPainting(aPresContext, aRenderingContext, PR_TRUE, &isVisible)) && isVisible) {
|
|
TextPaintStyle ts(aPresContext, aRenderingContext, mStyleContext);
|
|
if (ts.mSmallCaps || (0 != ts.mWordSpacing) || (0 != ts.mLetterSpacing)
|
|
|| ts.mJustifying) {
|
|
PaintTextSlowly(aPresContext, aRenderingContext, sc, ts, 0, 0);
|
|
}
|
|
else {
|
|
// Get the text fragment
|
|
nsCOMPtr<nsITextContent> tc = do_QueryInterface(mContent);
|
|
const nsTextFragment* frag = nsnull;
|
|
if (tc) {
|
|
frag = tc->Text();
|
|
if (!frag) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
}
|
|
|
|
// Choose rendering pathway based on rendering context performance
|
|
// hint, whether it needs to be transformed, and whether it's
|
|
// multi-byte
|
|
PRBool hasMultiByteChars = (0 != (mState & TEXT_HAS_MULTIBYTE));
|
|
PRUint32 hints = 0;
|
|
aRenderingContext.GetHints(hints);
|
|
|
|
#ifdef IBMBIDI
|
|
PRBool bidiEnabled = aPresContext->BidiEnabled();
|
|
#else
|
|
const PRBool bidiEnabled = PR_FALSE;
|
|
#endif // IBMBIDI
|
|
// * BiDi text or text with multi-byte characters must always be
|
|
// rendered as Unicode.
|
|
// * Non-transformed, 1-byte text should always be rendered as
|
|
// ASCII.
|
|
// * Other transformed or 2-byte text should be rendered according
|
|
// to the preference of the hint from the rendering context.
|
|
if (bidiEnabled || hasMultiByteChars ||
|
|
((0 == (hints & NS_RENDERING_HINT_FAST_8BIT_TEXT)) &&
|
|
(frag->Is2b() || (0 != (mState & TEXT_WAS_TRANSFORMED))))) {
|
|
PaintUnicodeText(aPresContext, aRenderingContext, sc, ts, 0, 0);
|
|
}
|
|
else {
|
|
PaintAsciiText(aPresContext, aRenderingContext, sc, ts, 0, 0);
|
|
}
|
|
|
|
}
|
|
}
|
|
DO_GLOBAL_REFLOW_COUNT_DSP("nsTextFrame", &aRenderingContext);
|
|
return NS_OK;
|
|
}
|
|
|
|
PRBool
|
|
nsTextFrame::IsChineseJapaneseLangGroup()
|
|
{
|
|
const nsStyleVisibility* visibility = mStyleContext->GetStyleVisibility();
|
|
if (visibility->mLangGroup == nsLayoutAtoms::Japanese
|
|
|| visibility->mLangGroup == nsLayoutAtoms::Chinese
|
|
|| visibility->mLangGroup == nsLayoutAtoms::Taiwanese
|
|
|| visibility->mLangGroup == nsLayoutAtoms::HongKongChinese)
|
|
return PR_TRUE;
|
|
|
|
return PR_FALSE;
|
|
}
|
|
|
|
/*
|
|
* Currently only Unicode characters below 0x10000 have their spacing modified
|
|
* by justification. If characters above 0x10000 turn out to need
|
|
* justification spacing, that will require extra work. Currently,
|
|
* this function must not include 0xd800 to 0xdbff because these characters
|
|
* are surrogates.
|
|
*/
|
|
PRBool
|
|
nsTextFrame::IsJustifiableCharacter(PRUnichar aChar, PRBool aLangIsCJ)
|
|
{
|
|
if (0x20u == aChar || 0xa0u == aChar)
|
|
return PR_TRUE;
|
|
if (aChar < 0x2150u)
|
|
return PR_FALSE;
|
|
if (aLangIsCJ && (
|
|
(0x2150u <= aChar && aChar <= 0x22ffu) || // Number Forms, Arrows, Mathematical Operators
|
|
(0x2460u <= aChar && aChar <= 0x24ffu) || // Enclosed Alphanumerics
|
|
(0x2580u <= aChar && aChar <= 0x27bfu) || // Block Elements, Geometric Shapes, Miscellaneous Symbols, Dingbats
|
|
(0x27f0u <= aChar && aChar <= 0x2bffu) || // Supplemental Arrows-A, Braille Patterns, Supplemental Arrows-B,
|
|
// Miscellaneous Mathematical Symbols-B, Supplemental Mathematical Operators,
|
|
// Miscellaneous Symbols and Arrows
|
|
(0x2e80u <= aChar && aChar <= 0x312fu) || // CJK Radicals Supplement, CJK Radicals Supplement,
|
|
// Ideographic Description Characters, CJK Symbols and Punctuation,
|
|
// Hiragana, Katakana, Bopomofo
|
|
(0x3190u <= aChar && aChar <= 0xabffu) || // Kanbun, Bopomofo Extended, Katakana Phonetic Extensions,
|
|
// Enclosed CJK Letters and Months, CJK Compatibility,
|
|
// CJK Unified Ideographs Extension A, Yijing Hexagram Symbols,
|
|
// CJK Unified Ideographs, Yi Syllables, Yi Radicals
|
|
(0xf900u <= aChar && aChar <= 0xfaffu) || // CJK Compatibility Ideographs
|
|
(0xff5eu <= aChar && aChar <= 0xff9fu) // Halfwidth and Fullwidth Forms(a part)
|
|
))
|
|
return PR_TRUE;
|
|
return PR_FALSE;
|
|
}
|
|
|
|
nsresult
|
|
nsTextFrame::FillClusterBuffer(nsPresContext *aPresContext, const PRUnichar *aText,
|
|
PRUint32 aLength, nsAutoPRUint8Buffer& aClusterBuffer)
|
|
{
|
|
nsresult rv = aClusterBuffer.GrowTo(aLength);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// Fill in the cluster hint information, if it's available.
|
|
nsCOMPtr<nsIRenderingContext> acx;
|
|
PRUint32 clusterHint = 0;
|
|
|
|
nsIPresShell *shell = aPresContext->GetPresShell();
|
|
if (shell) {
|
|
rv = shell->CreateRenderingContext(this, getter_AddRefs(acx));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// Find the font metrics for this text
|
|
SetFontFromStyle(acx, mStyleContext);
|
|
|
|
acx->GetHints(clusterHint);
|
|
clusterHint &= NS_RENDERING_HINT_TEXT_CLUSTERS;
|
|
}
|
|
|
|
if (clusterHint) {
|
|
rv = acx->GetClusterInfo(aText, aLength, aClusterBuffer.mBuffer);
|
|
}
|
|
else {
|
|
memset(aClusterBuffer.mBuffer, 1, sizeof(PRInt8) * aLength);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
inline PRBool IsEndOfLine(nsFrameState aState)
|
|
{
|
|
return (aState & TEXT_IS_END_OF_LINE) ? PR_TRUE : PR_FALSE;
|
|
}
|
|
|
|
/**
|
|
* Prepare the text in the content for rendering. If aIndexes is not nsnull
|
|
* then fill in aIndexes's with the mapping from the original input to
|
|
* the prepared output.
|
|
*/
|
|
void
|
|
nsTextFrame::PrepareUnicodeText(nsTextTransformer& aTX,
|
|
nsAutoIndexBuffer* aIndexBuffer,
|
|
nsAutoTextBuffer* aTextBuffer,
|
|
PRInt32* aTextLen,
|
|
PRBool aForceArabicShaping,
|
|
PRIntn* aJustifiableCharCount)
|
|
{
|
|
// Setup transform to operate starting in the content at our content
|
|
// offset
|
|
aTX.Init(this, mContent, mContentOffset, aForceArabicShaping);
|
|
|
|
PRInt32 strInx = mContentOffset;
|
|
PRInt32* indexp = aIndexBuffer ? aIndexBuffer->mBuffer : nsnull;
|
|
|
|
// Skip over the leading whitespace
|
|
PRInt32 n = mContentLength;
|
|
if (0 != (mState & TEXT_SKIP_LEADING_WS)) {
|
|
PRBool isWhitespace, wasTransformed;
|
|
PRInt32 wordLen, contentLen;
|
|
// Set maximum word length. This is an ABUSE of the variable
|
|
// because on entry, this is DOM content length, but on exit,
|
|
// GetNextWord returns a transformed-string length in here!
|
|
wordLen = mContentOffset + mContentLength;
|
|
aTX.GetNextWord(PR_FALSE, &wordLen, &contentLen, &isWhitespace, &wasTransformed);
|
|
// we trip this assertion in bug 31053, but I think it's unnecessary
|
|
//NS_ASSERTION(isWhitespace, "mState and content are out of sync");
|
|
|
|
if (isWhitespace) {
|
|
if (nsnull != indexp) {
|
|
// Point mapping indicies at the same content index since
|
|
// all of the compressed whitespace maps down to the same
|
|
// renderable character.
|
|
PRInt32 i = contentLen;
|
|
while (--i >= 0) {
|
|
*indexp++ = strInx;
|
|
}
|
|
}
|
|
n -= contentLen;
|
|
if(n<0)
|
|
NS_WARNING("mContentLength is < FragmentLength");
|
|
}
|
|
}
|
|
|
|
// Rescan the content and transform it. Stop when we have consumed
|
|
// mContentLength characters.
|
|
PRUint8 textTransform = GetStyleText()->mTextTransform;
|
|
PRBool inWord = (TEXT_IN_WORD & mState) ? PR_TRUE : PR_FALSE;
|
|
PRInt32 column = mColumn;
|
|
PRInt32 textLength = 0;
|
|
PRInt32 dstOffset = 0;
|
|
|
|
nsAutoTextBuffer tmpTextBuffer;
|
|
nsAutoTextBuffer* textBuffer = aTextBuffer;
|
|
if (!textBuffer && aJustifiableCharCount)
|
|
textBuffer = &tmpTextBuffer;
|
|
|
|
while (n > 0) {
|
|
PRUnichar* bp;
|
|
PRBool isWhitespace, wasTransformed;
|
|
PRInt32 wordLen, contentLen;
|
|
|
|
// Set maximum word length. This is an ABUSE of the variable
|
|
// because on entry, this is DOM content length, but on exit,
|
|
// GetNextWord returns a transformed-string length in here!
|
|
wordLen = mContentOffset + mContentLength;
|
|
// Get the next word
|
|
bp = aTX.GetNextWord(inWord, &wordLen, &contentLen, &isWhitespace, &wasTransformed);
|
|
if (nsnull == bp) {
|
|
if (indexp) {
|
|
while (--n >= 0) {
|
|
*indexp++ = strInx;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
inWord = PR_FALSE;
|
|
if (isWhitespace) {
|
|
if ('\t' == bp[0]) {
|
|
PRInt32 spaces = 8 - (7 & column);
|
|
PRUnichar* tp = bp;
|
|
wordLen = spaces;
|
|
while (--spaces >= 0) {
|
|
*tp++ = ' ';
|
|
}
|
|
// XXX This is a one to many mapping that I think isn't handled well
|
|
if (nsnull != indexp) {
|
|
*indexp++ = strInx;
|
|
strInx += wordLen;
|
|
}
|
|
}
|
|
else if ('\n' == bp[0]) {
|
|
if (nsnull != indexp) {
|
|
*indexp++ = strInx;
|
|
}
|
|
break;
|
|
}
|
|
else if (nsnull != indexp) {
|
|
if (1 == wordLen) {
|
|
// Point mapping indicies at the same content index since
|
|
// all of the compressed whitespace maps down to the same
|
|
// renderable character.
|
|
PRInt32 i = contentLen;
|
|
while (--i >= 0) {
|
|
*indexp++ = strInx;
|
|
}
|
|
strInx++;
|
|
} else {
|
|
// Point mapping indicies at each content index in the word
|
|
PRInt32 i = contentLen;
|
|
while (--i >= 0) {
|
|
*indexp++ = strInx++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
PRInt32 i = contentLen;
|
|
if (nsnull != indexp) {
|
|
// Point mapping indices at each content index in the word
|
|
if (!wasTransformed) {
|
|
while (--i >= 0) {
|
|
*indexp++ = strInx++;
|
|
}
|
|
} else {
|
|
PRUnichar* tp = bp;
|
|
PRBool caseChanged =
|
|
textTransform == NS_STYLE_TEXT_TRANSFORM_UPPERCASE ||
|
|
textTransform == NS_STYLE_TEXT_TRANSFORM_CAPITALIZE;
|
|
while (--i >= 0) {
|
|
PRUnichar ch = aTX.GetContentCharAt(mContentOffset +
|
|
indexp - aIndexBuffer->mBuffer);
|
|
if (IS_DISCARDED(ch) || ch == '\n') {
|
|
*indexp++ = strInx;
|
|
continue;
|
|
}
|
|
*indexp++ = strInx++;
|
|
// Point any capitalized German ß to 'SS'
|
|
if (caseChanged && ch == kSZLIG && *tp == PRUnichar('S')) {
|
|
++strInx;
|
|
++tp;
|
|
}
|
|
++tp;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Grow the buffer before we run out of room.
|
|
if (textBuffer != nsnull && dstOffset + wordLen > textBuffer->mBufferLen) {
|
|
nsresult rv = textBuffer->GrowBy(wordLen);
|
|
if (NS_FAILED(rv)) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
column += wordLen;
|
|
textLength += wordLen;
|
|
n -= contentLen;
|
|
if (textBuffer != nsnull) {
|
|
memcpy(textBuffer->mBuffer + dstOffset, bp,
|
|
sizeof(PRUnichar)*wordLen);
|
|
}
|
|
dstOffset += wordLen;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
if (aIndexBuffer) {
|
|
NS_ASSERTION(indexp <= aIndexBuffer->mBuffer + aIndexBuffer->mBufferLen,
|
|
"yikes - we just overwrote memory");
|
|
}
|
|
if (textBuffer) {
|
|
NS_ASSERTION(dstOffset <= textBuffer->mBufferLen,
|
|
"yikes - we just overwrote memory");
|
|
}
|
|
|
|
#endif
|
|
|
|
// Remove trailing whitespace if it was trimmed after reflow
|
|
// TEXT_TRIMMED_WS can be set in measureText during reflow, and
|
|
// nonexitent text buffer may occur in this situation.
|
|
if (TEXT_TRIMMED_WS & mState && textBuffer) {
|
|
if (--dstOffset >= 0) {
|
|
PRUnichar ch = textBuffer->mBuffer[dstOffset];
|
|
if (XP_IS_SPACE(ch))
|
|
textLength--;
|
|
}
|
|
}
|
|
|
|
if (aIndexBuffer) {
|
|
PRInt32* ip = aIndexBuffer->mBuffer;
|
|
ip[mContentLength] = ip[mContentLength-1];
|
|
if ((ip[mContentLength] - mContentOffset) < textLength) {
|
|
// Must set up last one for selection beyond edge if in boundary
|
|
ip[mContentLength] = textLength + mContentOffset;
|
|
}
|
|
}
|
|
|
|
*aTextLen = textLength;
|
|
|
|
if (aJustifiableCharCount && textBuffer) {
|
|
PRBool isCJ = IsChineseJapaneseLangGroup();
|
|
PRIntn numJustifiableCharacter = 0;
|
|
PRInt32 justifiableRange = textLength;
|
|
if (IsEndOfLine(mState))
|
|
justifiableRange--;
|
|
for (PRInt32 i = 0; i < justifiableRange; i++) {
|
|
if (IsJustifiableCharacter(textBuffer->mBuffer[i], isCJ))
|
|
numJustifiableCharacter++;
|
|
}
|
|
*aJustifiableCharCount = numJustifiableCharacter;
|
|
}
|
|
}
|
|
|
|
|
|
//#define SHOW_SELECTION_CURSOR // should be turned off when the caret code is activated
|
|
|
|
#ifdef SHOW_SELECTION_CURSOR
|
|
|
|
// XXX This clearly needs to be done by the container, *somehow*
|
|
#define CURSOR_COLOR NS_RGB(0,0,255)
|
|
static void
|
|
RenderSelectionCursor(nsIRenderingContext& aRenderingContext,
|
|
nscoord dx, nscoord dy, nscoord aHeight,
|
|
nscolor aCursorColor)
|
|
{
|
|
nsPoint pnts[4];
|
|
nscoord ox = aHeight / 4;
|
|
nscoord oy = ox;
|
|
nscoord x0 = dx;
|
|
nscoord y0 = dy + aHeight;
|
|
pnts[0].x = x0 - ox;
|
|
pnts[0].y = y0;
|
|
pnts[1].x = x0;
|
|
pnts[1].y = y0 - oy;
|
|
pnts[2].x = x0 + ox;
|
|
pnts[2].y = y0;
|
|
pnts[3].x = x0 - ox;
|
|
pnts[3].y = y0;
|
|
|
|
// Draw little blue triangle
|
|
aRenderingContext.SetColor(aCursorColor);
|
|
aRenderingContext.FillPolygon(pnts, 4);
|
|
}
|
|
|
|
#endif
|
|
|
|
// XXX letter-spacing
|
|
// XXX word-spacing
|
|
#if defined(XP_MACOSX)
|
|
#define NO_INVERT
|
|
#elif defined(XP_WIN) || defined(XP_OS2) || defined(XP_UNIX)
|
|
#define USE_INVERT_FOR_SELECTION
|
|
#endif
|
|
|
|
// XXX we should get the following from style sheet or LookAndFeel later
|
|
#if defined(NO_INVERT)
|
|
#define IME_UNDERLINECOLOR NS_RGB(149,149,149) //light gray
|
|
#define IME_SELECTED_UNDERLINECOLOR NS_RGB(0,0,0) //black
|
|
#else
|
|
#define IME_RAW_COLOR NS_RGB(198,33,66)
|
|
#define IME_CONVERTED_COLOR NS_RGB(255,198,198)
|
|
#endif
|
|
|
|
void
|
|
nsTextFrame::PaintTextDecorations(nsIRenderingContext& aRenderingContext,
|
|
nsStyleContext* aStyleContext,
|
|
nsPresContext* aPresContext,
|
|
TextPaintStyle& aTextStyle,
|
|
nscoord aX, nscoord aY, nscoord aWidth,
|
|
PRBool aRightToLeftText,
|
|
PRUnichar *aText, /*=nsnull*/
|
|
SelectionDetails *aDetails,/*= nsnull*/
|
|
PRUint32 aIndex, /*= 0*/
|
|
PRUint32 aLength, /*= 0*/
|
|
const nscoord* aSpacing /* = nsnull*/ )
|
|
|
|
{
|
|
// Quirks mode text decoration are rendered by children; see bug 1777
|
|
// In non-quirks mode, nsHTMLContainer::Paint and nsBlockFrame::Paint
|
|
// does the painting of text decorations.
|
|
if (eCompatibility_NavQuirks == aPresContext->CompatibilityMode()) {
|
|
nscolor overColor, underColor, strikeColor;
|
|
|
|
PRBool useOverride = PR_FALSE;
|
|
nscolor overrideColor;
|
|
|
|
PRUint8 decorations = NS_STYLE_TEXT_DECORATION_NONE;
|
|
// A mask of all possible decorations.
|
|
PRUint8 decorMask = NS_STYLE_TEXT_DECORATION_UNDERLINE |
|
|
NS_STYLE_TEXT_DECORATION_OVERLINE |
|
|
NS_STYLE_TEXT_DECORATION_LINE_THROUGH;
|
|
nsStyleContext* context = aStyleContext;
|
|
PRBool hasDecorations = context->HasTextDecorations();
|
|
|
|
while (hasDecorations) {
|
|
const nsStyleTextReset* styleText = context->GetStyleTextReset();
|
|
if (!useOverride &&
|
|
(NS_STYLE_TEXT_DECORATION_OVERRIDE_ALL &
|
|
styleText->mTextDecoration)) {
|
|
// This handles the <a href="blah.html"><font color="green">La
|
|
// la la</font></a> case. The link underline should be green.
|
|
useOverride = PR_TRUE;
|
|
overrideColor = context->GetStyleColor()->mColor;
|
|
}
|
|
|
|
PRUint8 useDecorations = decorMask & styleText->mTextDecoration;
|
|
if (useDecorations) {// a decoration defined here
|
|
nscolor color = context->GetStyleColor()->mColor;
|
|
|
|
if (NS_STYLE_TEXT_DECORATION_UNDERLINE & useDecorations) {
|
|
underColor = useOverride ? overrideColor : color;
|
|
decorMask &= ~NS_STYLE_TEXT_DECORATION_UNDERLINE;
|
|
decorations |= NS_STYLE_TEXT_DECORATION_UNDERLINE;
|
|
}
|
|
if (NS_STYLE_TEXT_DECORATION_OVERLINE & useDecorations) {
|
|
overColor = useOverride ? overrideColor : color;
|
|
decorMask &= ~NS_STYLE_TEXT_DECORATION_OVERLINE;
|
|
decorations |= NS_STYLE_TEXT_DECORATION_OVERLINE;
|
|
}
|
|
if (NS_STYLE_TEXT_DECORATION_LINE_THROUGH & useDecorations) {
|
|
strikeColor = useOverride ? overrideColor : color;
|
|
decorMask &= ~NS_STYLE_TEXT_DECORATION_LINE_THROUGH;
|
|
decorations |= NS_STYLE_TEXT_DECORATION_LINE_THROUGH;
|
|
}
|
|
}
|
|
if (0 == decorMask)
|
|
break;
|
|
context = context->GetParent();
|
|
if (!context)
|
|
break;
|
|
hasDecorations = context->HasTextDecorations();
|
|
}
|
|
|
|
nscoord offset;
|
|
nscoord size;
|
|
nscoord baseline = mAscent;
|
|
if (decorations & (NS_FONT_DECORATION_OVERLINE |
|
|
NS_FONT_DECORATION_UNDERLINE)) {
|
|
aTextStyle.mNormalFont->GetUnderline(offset, size);
|
|
if (decorations & NS_FONT_DECORATION_OVERLINE) {
|
|
aRenderingContext.SetColor(overColor);
|
|
aRenderingContext.FillRect(aX, aY, aWidth, size);
|
|
}
|
|
if (decorations & NS_FONT_DECORATION_UNDERLINE) {
|
|
aRenderingContext.SetColor(underColor);
|
|
aRenderingContext.FillRect(aX, aY + baseline - offset, aWidth, size);
|
|
}
|
|
}
|
|
if (decorations & NS_FONT_DECORATION_LINE_THROUGH) {
|
|
aTextStyle.mNormalFont->GetStrikeout(offset, size);
|
|
aRenderingContext.SetColor(strikeColor);
|
|
aRenderingContext.FillRect(aX, aY + baseline - offset, aWidth, size);
|
|
}
|
|
}
|
|
|
|
if (aDetails){
|
|
nsRect rect = GetRect();
|
|
while(aDetails){
|
|
const nscoord* sp= aSpacing;
|
|
PRInt32 startOffset = 0;
|
|
PRInt32 textWidth = 0;
|
|
PRInt32 start = PR_MAX(0,(aDetails->mStart - (PRInt32)aIndex));
|
|
PRInt32 end = PR_MIN((PRInt32)aLength,(aDetails->mEnd - (PRInt32)aIndex));
|
|
PRInt32 i;
|
|
if ((start < end) && ((aLength - start) > 0))
|
|
{
|
|
//aDetails allready processed to have offsets from frame start not content offsets
|
|
if (start < end){
|
|
if (aLength == 1)
|
|
textWidth = aWidth;
|
|
else {
|
|
if (aDetails->mStart > 0){
|
|
if (sp)
|
|
{
|
|
for (i = 0; i < start;i ++){
|
|
startOffset += *sp ++;
|
|
}
|
|
}
|
|
else
|
|
aRenderingContext.GetWidth(aText, start, startOffset);
|
|
}
|
|
if (sp){
|
|
for (i = start; i < end;i ++){
|
|
textWidth += *sp ++;
|
|
}
|
|
}
|
|
else
|
|
aRenderingContext.GetWidth(aText + start,
|
|
PRUint32(end - start), textWidth);
|
|
|
|
}
|
|
nscoord offset, size;
|
|
nscoord baseline = mAscent;
|
|
switch (aDetails->mType)
|
|
{
|
|
case nsISelectionController::SELECTION_NORMAL:
|
|
#if 0
|
|
{
|
|
//using new selectionpainting now
|
|
//
|
|
// XOR InvertRect is currently implemented only in the unix and windows
|
|
// rendering contexts. When other platforms implement InvertRect(), they
|
|
// can be added here. Eventually this #ifdef should die.
|
|
//
|
|
// For platforms that dont implement InvertRect(), the selection will be
|
|
// a non-filled rectangle.
|
|
#ifdef USE_INVERT_FOR_SELECTION
|
|
aRenderingContext.SetColor(NS_RGB(255,255,255));
|
|
aRenderingContext.InvertRect(aX + startOffset, aY, textWidth, rect.height);
|
|
#else
|
|
aRenderingContext.SetColor(NS_RGB(0,0,0));
|
|
aRenderingContext.DrawRect(aX + startOffset, aY, textWidth, rect.height);
|
|
#endif
|
|
}
|
|
#endif //0
|
|
break;
|
|
case nsISelectionController::SELECTION_SPELLCHECK:{
|
|
aTextStyle.mNormalFont->GetUnderline(offset, size);
|
|
aRenderingContext.SetLineStyle(nsLineStyle_kDotted);
|
|
aRenderingContext.SetColor(NS_RGB(255,0,0));
|
|
/*
|
|
* If the rendering context is drawing text from right to left,
|
|
* reverse the coordinates of the underline to match.
|
|
*/
|
|
if (aRightToLeftText) {
|
|
nscoord rightEdge = aX + aWidth;
|
|
aRenderingContext.DrawLine(rightEdge - textWidth - startOffset,
|
|
aY + baseline - offset,
|
|
rightEdge - startOffset,
|
|
aY + baseline - offset);
|
|
}
|
|
else {
|
|
aRenderingContext.DrawLine(aX + startOffset,
|
|
aY + baseline - offset,
|
|
aX + startOffset + textWidth,
|
|
aY + baseline - offset);
|
|
}
|
|
}break;
|
|
|
|
#ifdef NO_INVERT
|
|
case nsISelectionController::SELECTION_IME_SELECTEDRAWTEXT:
|
|
case nsISelectionController::SELECTION_IME_SELECTEDCONVERTEDTEXT:{
|
|
NS_ASSERTION(!aRightToLeftText,
|
|
"Right-to-left text in IME not handled");
|
|
aTextStyle.mNormalFont->GetUnderline(offset, size);
|
|
aRenderingContext.SetColor(IME_SELECTED_UNDERLINECOLOR);
|
|
#ifdef XP_MACOSX // underline thickness is 2 pixel
|
|
aRenderingContext.FillRect(aX + startOffset+size, aY + baseline - offset, textWidth-2*size, 2*size);
|
|
#else
|
|
aRenderingContext.FillRect(aX + startOffset+size, aY + baseline - offset, textWidth-2*size, size);
|
|
#endif
|
|
}break;
|
|
case nsISelectionController::SELECTION_IME_RAWINPUT:
|
|
case nsISelectionController::SELECTION_IME_CONVERTEDTEXT:{
|
|
NS_ASSERTION(!aRightToLeftText,
|
|
"Right-to-left text in IME not handled");
|
|
aTextStyle.mNormalFont->GetUnderline(offset, size);
|
|
aRenderingContext.SetColor(IME_UNDERLINECOLOR);
|
|
#ifdef XP_MACOSX // underline thicness is 2 pixel
|
|
aRenderingContext.FillRect(aX + startOffset+size, aY + baseline - offset, textWidth-2*size, 2*size);
|
|
#else
|
|
aRenderingContext.FillRect(aX + startOffset+size, aY + baseline - offset, textWidth-2*size, size);
|
|
#endif
|
|
}break;
|
|
// end NO_INVERT part
|
|
|
|
#else
|
|
case nsISelectionController::SELECTION_IME_SELECTEDRAWTEXT:{
|
|
NS_ASSERTION(!aRightToLeftText,
|
|
"Right-to-left text in IME not handled");
|
|
#ifdef USE_INVERT_FOR_SELECTION
|
|
aRenderingContext.SetColor(NS_RGB(255,255,255));
|
|
aRenderingContext.InvertRect(aX + startOffset, aY, textWidth, rect.height);
|
|
#else
|
|
aRenderingContext.SetColor(NS_RGB(255,255,128));
|
|
aRenderingContext.DrawRect(aX + startOffset, aY, textWidth, rect.height);
|
|
#endif
|
|
aTextStyle.mNormalFont->GetUnderline(offset, size);
|
|
aRenderingContext.SetColor(IME_RAW_COLOR);
|
|
aRenderingContext.FillRect(aX + startOffset+size, aY + baseline - offset, textWidth-2*size, size);
|
|
}break;
|
|
case nsISelectionController::SELECTION_IME_RAWINPUT:{
|
|
NS_ASSERTION(!aRightToLeftText,
|
|
"Right-to-left text in IME not handled");
|
|
aTextStyle.mNormalFont->GetUnderline(offset, size);
|
|
aRenderingContext.SetColor(IME_RAW_COLOR);
|
|
aRenderingContext.FillRect(aX + startOffset+size, aY + baseline - offset, textWidth-2*size, size);
|
|
}break;
|
|
case nsISelectionController::SELECTION_IME_SELECTEDCONVERTEDTEXT:{
|
|
NS_ASSERTION(!aRightToLeftText,
|
|
"Right-to-left text in IME not handled");
|
|
#ifdef USE_INVERT_FOR_SELECTION
|
|
aRenderingContext.SetColor(NS_RGB(255,255,255));
|
|
aRenderingContext.InvertRect(aX + startOffset, aY, textWidth, rect.height);
|
|
#else
|
|
aRenderingContext.SetColor(NS_RGB(255,255,128));
|
|
aRenderingContext.DrawRect(aX + startOffset, aY, textWidth, rect.height);
|
|
#endif
|
|
aTextStyle.mNormalFont->GetUnderline(offset, size);
|
|
aRenderingContext.SetColor(IME_CONVERTED_COLOR);
|
|
aRenderingContext.FillRect(aX + startOffset+size, aY + baseline - offset, textWidth-2*size, size);
|
|
}break;
|
|
case nsISelectionController::SELECTION_IME_CONVERTEDTEXT:{
|
|
NS_ASSERTION(!aRightToLeftText,
|
|
"Right-to-left text in IME not handled");
|
|
aTextStyle.mNormalFont->GetUnderline(offset, size);
|
|
aRenderingContext.SetColor(IME_CONVERTED_COLOR);
|
|
aRenderingContext.FillRect(aX + startOffset+size, aY + baseline - offset, textWidth-2*size, size);
|
|
}break;
|
|
#endif
|
|
default:
|
|
NS_ASSERTION(0,"what type of selection do i not know about?");
|
|
break;
|
|
}
|
|
|
|
}
|
|
}
|
|
aDetails = aDetails->mNext;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
nsresult
|
|
nsTextFrame::GetContentAndOffsetsForSelection(nsPresContext *aPresContext, nsIContent **aContent, PRInt32 *aOffset, PRInt32 *aLength)
|
|
{
|
|
if (!aContent || !aOffset || !aLength)
|
|
return NS_ERROR_NULL_POINTER;
|
|
//ARE WE GENERATED??
|
|
*aContent = nsnull;
|
|
*aOffset = mContentOffset;
|
|
*aLength = mContentLength;
|
|
nsIFrame *parent = GetParent();
|
|
if (parent)
|
|
{
|
|
if ((mState & NS_FRAME_GENERATED_CONTENT) != 0)//parent is generated so so are we.
|
|
{
|
|
//we COULD check the previous sibling but I dont think that is reliable
|
|
*aContent = parent->GetContent();
|
|
if(!*aContent)
|
|
return NS_ERROR_FAILURE;
|
|
NS_ADDREF(*aContent);
|
|
|
|
//ARE WE A BEFORE FRAME? if not then we assume we are an after frame. this may be bad later
|
|
nsIFrame *grandParent = parent->GetParent();
|
|
if (grandParent)
|
|
{
|
|
nsIFrame *firstParent = grandParent->GetFirstChild(nsnull);
|
|
if (firstParent)
|
|
{
|
|
*aLength = 0;
|
|
if (firstParent == parent) //then our parent is the first child of granddad. use BEFORE
|
|
{
|
|
*aOffset = 0;
|
|
}
|
|
else
|
|
{
|
|
*aOffset = (*aContent)->GetChildCount();
|
|
}
|
|
}
|
|
else
|
|
return NS_OK;
|
|
}
|
|
}
|
|
}
|
|
//END GENERATED BLOCK
|
|
if (!*aContent)
|
|
{
|
|
*aContent = mContent;
|
|
NS_IF_ADDREF(*aContent);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
//---------------------------------------------------------
|
|
nsresult nsTextFrame::GetTextInfoForPainting(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
nsIPresShell** aPresShell,
|
|
nsISelectionController** aSelectionController,
|
|
PRBool& aDisplayingSelection,
|
|
PRBool& aIsPaginated,
|
|
PRBool& aIsSelected,
|
|
PRBool& aHideStandardSelection,
|
|
PRInt16& aSelectionValue,
|
|
nsILineBreaker** aLineBreaker)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aPresContext);
|
|
NS_ENSURE_ARG_POINTER(aPresShell);
|
|
NS_ENSURE_ARG_POINTER(aSelectionController);
|
|
NS_ENSURE_ARG_POINTER(aLineBreaker);
|
|
|
|
//get the presshell
|
|
NS_IF_ADDREF(*aPresShell = aPresContext->GetPresShell());
|
|
if (!*aPresShell)
|
|
return NS_ERROR_FAILURE;
|
|
|
|
//get the selection controller
|
|
nsresult rv = GetSelectionController(aPresContext, aSelectionController);
|
|
if (NS_FAILED(rv) || !(*aSelectionController))
|
|
return NS_ERROR_FAILURE;
|
|
|
|
aIsPaginated = aPresContext->IsPaginated();
|
|
|
|
(*aSelectionController)->GetDisplaySelection(&aSelectionValue);
|
|
|
|
if (aIsPaginated) {
|
|
aDisplayingSelection = aPresContext->IsRenderingOnlySelection();
|
|
} else {
|
|
//if greater than hidden then we display some kind of selection
|
|
aDisplayingSelection = (aSelectionValue > nsISelectionController::SELECTION_HIDDEN);
|
|
}
|
|
|
|
PRInt16 textSel=0;
|
|
(*aSelectionController)->GetSelectionFlags(&textSel);
|
|
if (!(textSel & nsISelectionDisplay::DISPLAY_TEXT))
|
|
aDisplayingSelection = PR_FALSE;
|
|
|
|
// the spellcheck selection should be visible all the time
|
|
aHideStandardSelection = !aDisplayingSelection;
|
|
if (!aDisplayingSelection){
|
|
nsCOMPtr<nsISelection> spellcheckSelection;
|
|
(*aSelectionController)->GetSelection(nsISelectionController::SELECTION_SPELLCHECK,
|
|
getter_AddRefs(spellcheckSelection));
|
|
if (spellcheckSelection){
|
|
PRBool iscollapsed = PR_FALSE;
|
|
spellcheckSelection->GetIsCollapsed(&iscollapsed);
|
|
if (!iscollapsed)
|
|
aDisplayingSelection = PR_TRUE;
|
|
}
|
|
}
|
|
|
|
// Transform text from content into renderable form
|
|
// XXX If the text fragment is already Unicode and the text wasn't
|
|
// transformed when we formatted it, then there's no need to do all
|
|
// this and we should just render the text fragment directly. See
|
|
// PaintAsciiText()...
|
|
nsIDocument *doc = (*aPresShell)->GetDocument();
|
|
if (!doc)
|
|
return NS_ERROR_FAILURE;
|
|
|
|
NS_IF_ADDREF(*aLineBreaker = doc->GetLineBreaker());
|
|
|
|
aIsSelected = (GetStateBits() & NS_FRAME_SELECTED_CONTENT) == NS_FRAME_SELECTED_CONTENT;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
PRBool
|
|
nsTextFrame::IsTextInSelection(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext)
|
|
{
|
|
nsCOMPtr<nsISelectionController> selCon;
|
|
nsCOMPtr<nsIPresShell> shell;
|
|
PRBool displaySelection;
|
|
PRBool isPaginated;
|
|
PRBool isSelected;
|
|
PRBool hideStandardSelection;
|
|
PRInt16 selectionValue;
|
|
nsCOMPtr<nsILineBreaker> lb;
|
|
if (NS_FAILED(GetTextInfoForPainting(aPresContext,
|
|
aRenderingContext,
|
|
getter_AddRefs(shell),
|
|
getter_AddRefs(selCon),
|
|
displaySelection,
|
|
isPaginated,
|
|
isSelected,
|
|
hideStandardSelection,
|
|
selectionValue,
|
|
getter_AddRefs(lb)))) {
|
|
return PR_FALSE;
|
|
}
|
|
|
|
// Make enough space to transform
|
|
nsAutoTextBuffer paintBuffer;
|
|
nsAutoIndexBuffer indexBuffer;
|
|
if (NS_FAILED(indexBuffer.GrowTo(mContentLength + 1))) {
|
|
return PR_FALSE;
|
|
}
|
|
TextPaintStyle ts(aPresContext, aRenderingContext, mStyleContext);
|
|
|
|
// Transform text from content into renderable form
|
|
// XXX If the text fragment is already Unicode and the text wasn't
|
|
// transformed when we formatted it, then there's no need to do all
|
|
// this and we should just render the text fragment directly. See
|
|
// PaintAsciiText()...
|
|
|
|
nsTextTransformer tx(lb, nsnull, aPresContext);
|
|
PRInt32 textLength;
|
|
// no need to worry about justification, that's always on the slow path
|
|
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
|
|
|
|
PRInt32* ip = indexBuffer.mBuffer;
|
|
PRUnichar* text = paintBuffer.mBuffer;
|
|
|
|
isSelected = PR_FALSE;
|
|
if (0 != textLength) {
|
|
|
|
SelectionDetails *details = nsnull;
|
|
nsCOMPtr<nsIFrameSelection> frameSelection;
|
|
//get the frameSelection from the selection controller
|
|
if (selCon) {
|
|
frameSelection = do_QueryInterface(selCon); //this MAY implement
|
|
}
|
|
nsresult rv = NS_OK;
|
|
//if that failed get it from the pres shell
|
|
if (!frameSelection)
|
|
frameSelection = shell->FrameSelection();
|
|
|
|
nsCOMPtr<nsIContent> content;
|
|
PRInt32 offset;
|
|
PRInt32 length;
|
|
|
|
rv = GetContentAndOffsetsForSelection(aPresContext,
|
|
getter_AddRefs(content),
|
|
&offset, &length);
|
|
if (NS_SUCCEEDED(rv) && content) {
|
|
rv = frameSelection->LookUpSelection(content, mContentOffset,
|
|
mContentLength, &details,
|
|
PR_FALSE);
|
|
}
|
|
|
|
//where are the selection points "really"
|
|
SelectionDetails *sdptr = details;
|
|
while (sdptr){
|
|
sdptr->mStart = ip[sdptr->mStart] - mContentOffset;
|
|
sdptr->mEnd = ip[sdptr->mEnd] - mContentOffset;
|
|
sdptr = sdptr->mNext;
|
|
}
|
|
//while we have substrings...
|
|
//PRBool drawn = PR_FALSE;
|
|
DrawSelectionIterator iter(content, details,text,(PRUint32)textLength, ts, nsISelectionController::SELECTION_NORMAL, aPresContext, mStyleContext);
|
|
if (!iter.IsDone() && iter.First()) {
|
|
isSelected = PR_TRUE;
|
|
}
|
|
|
|
sdptr = details;
|
|
if (details) {
|
|
while ((sdptr = details->mNext) != nsnull) {
|
|
delete details;
|
|
details = sdptr;
|
|
}
|
|
delete details;
|
|
}
|
|
}
|
|
return isSelected;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::IsVisibleForPainting(nsPresContext * aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
PRBool aCheckVis,
|
|
PRBool* aIsVisible)
|
|
{
|
|
if (aCheckVis) {
|
|
if (!GetStyleVisibility()->IsVisible()) {
|
|
*aIsVisible = PR_FALSE;
|
|
return NS_OK;
|
|
}
|
|
}
|
|
|
|
// Start by assuming we are visible and need to be painted
|
|
PRBool isVisible = PR_TRUE;
|
|
|
|
if (aPresContext->IsPaginated()) {
|
|
if (aPresContext->IsRenderingOnlySelection()) {
|
|
// Check the quick way first
|
|
PRBool isSelected = (mState & NS_FRAME_SELECTED_CONTENT) == NS_FRAME_SELECTED_CONTENT;
|
|
if (isSelected) {
|
|
isVisible = IsTextInSelection(aPresContext, aRenderingContext);
|
|
} else {
|
|
isVisible = PR_FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
*aIsVisible = isVisible;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsTextFrame::PaintUnicodeText(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
nsStyleContext* aStyleContext,
|
|
TextPaintStyle& aTextStyle,
|
|
nscoord dx, nscoord dy)
|
|
{
|
|
nsCOMPtr<nsISelectionController> selCon;
|
|
nsCOMPtr<nsIPresShell> shell;
|
|
PRBool displaySelection,canDarkenColor=PR_FALSE;
|
|
PRBool isPaginated;
|
|
PRBool isSelected;
|
|
PRBool hideStandardSelection;
|
|
PRInt16 selectionValue;
|
|
nsCOMPtr<nsILineBreaker> lb;
|
|
#ifdef IBMBIDI
|
|
PRBool isOddLevel = PR_FALSE;
|
|
#endif
|
|
|
|
if (NS_FAILED(GetTextInfoForPainting(aPresContext,
|
|
aRenderingContext,
|
|
getter_AddRefs(shell),
|
|
getter_AddRefs(selCon),
|
|
displaySelection,
|
|
isPaginated,
|
|
isSelected,
|
|
hideStandardSelection,
|
|
selectionValue,
|
|
getter_AddRefs(lb)))) {
|
|
return;
|
|
}
|
|
|
|
if(isPaginated){
|
|
canDarkenColor = CanDarken(aPresContext);
|
|
}
|
|
|
|
// Make enough space to transform
|
|
nsAutoTextBuffer paintBuffer;
|
|
nsAutoIndexBuffer indexBuffer;
|
|
if (displaySelection) {
|
|
if (NS_FAILED(indexBuffer.GrowTo(mContentLength + 1))) {
|
|
return;
|
|
}
|
|
}
|
|
nscoord width = mRect.width;
|
|
|
|
// Transform text from content into renderable form
|
|
// XXX If the text fragment is already Unicode and the text wasn't
|
|
// transformed when we formatted it, then there's no need to do all
|
|
// this and we should just render the text fragment directly. See
|
|
// PaintAsciiText()...
|
|
|
|
nsTextTransformer tx(lb, nsnull, aPresContext);
|
|
PRInt32 textLength;
|
|
// no need to worry about justification, that's always on the slow path
|
|
PrepareUnicodeText(tx, (displaySelection ? &indexBuffer : nsnull),
|
|
&paintBuffer, &textLength);
|
|
|
|
PRInt32* ip = indexBuffer.mBuffer;
|
|
PRUnichar* text = paintBuffer.mBuffer;
|
|
|
|
if (0 != textLength)
|
|
{
|
|
#ifdef IBMBIDI
|
|
PRBool isRightToLeftOnBidiPlatform = PR_FALSE;
|
|
PRBool isBidiSystem = PR_FALSE;
|
|
nsCharType charType = eCharType_LeftToRight;
|
|
if (aPresContext->BidiEnabled()) {
|
|
isBidiSystem = aPresContext->IsBidiSystem();
|
|
isOddLevel = NS_GET_EMBEDDING_LEVEL(this) & 1;
|
|
charType = (nsCharType)NS_PTR_TO_INT32(aPresContext->PropertyTable()->GetProperty(this, nsLayoutAtoms::charType));
|
|
|
|
isRightToLeftOnBidiPlatform = (isBidiSystem &&
|
|
(eCharType_RightToLeft == charType ||
|
|
eCharType_RightToLeftArabic == charType));
|
|
if (isRightToLeftOnBidiPlatform) {
|
|
// indicate that the platform should use its native
|
|
// capabilities to reorder the text with right-to-left
|
|
// base direction
|
|
aRenderingContext.SetRightToLeftText(PR_TRUE);
|
|
}
|
|
nsBidiPresUtils* bidiUtils = aPresContext->GetBidiUtils();
|
|
if (bidiUtils) {
|
|
#ifdef DEBUG
|
|
PRInt32 rememberTextLength = textLength;
|
|
#endif
|
|
bidiUtils->ReorderUnicodeText(text, textLength,
|
|
charType, isOddLevel, isBidiSystem);
|
|
NS_ASSERTION(rememberTextLength == textLength, "Bidi formatting changed text length");
|
|
}
|
|
}
|
|
#endif // IBMBIDI
|
|
if (!displaySelection || !isSelected ) //draw text normally
|
|
{
|
|
// When there is no selection showing, use the fastest and
|
|
// simplest rendering approach
|
|
|
|
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
|
|
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy + mAscent);
|
|
PaintTextDecorations(aRenderingContext, aStyleContext, aPresContext,
|
|
aTextStyle, dx, dy, width, PR_FALSE);
|
|
}
|
|
else
|
|
{ //we draw according to selection rules
|
|
SelectionDetails *details = nsnull;
|
|
nsCOMPtr<nsIFrameSelection> frameSelection;
|
|
//get the frameSelection from the selection controller
|
|
if (selCon)
|
|
{
|
|
frameSelection = do_QueryInterface(selCon); //this MAY implement
|
|
}
|
|
//if that failed get it from the pres shell
|
|
nsresult rv = NS_OK;
|
|
if (!frameSelection)
|
|
frameSelection = shell->FrameSelection();
|
|
nsCOMPtr<nsIContent> content;
|
|
PRInt32 offset;
|
|
PRInt32 length;
|
|
|
|
rv = GetContentAndOffsetsForSelection(aPresContext,
|
|
getter_AddRefs(content),
|
|
&offset, &length);
|
|
if (NS_SUCCEEDED(rv) && content) {
|
|
rv = frameSelection->LookUpSelection(content, mContentOffset,
|
|
mContentLength, &details,
|
|
PR_FALSE);
|
|
}
|
|
|
|
//where are the selection points "really"
|
|
SelectionDetails *sdptr = details;
|
|
while (sdptr){
|
|
sdptr->mStart = ip[sdptr->mStart] - mContentOffset;
|
|
sdptr->mEnd = ip[sdptr->mEnd] - mContentOffset;
|
|
#ifdef SUNCTL
|
|
nsCOMPtr<nsILE> ctlObj;
|
|
ctlObj = do_CreateInstance(kLECID, &rv);
|
|
if (NS_FAILED(rv)) {
|
|
NS_WARNING("Cell based cursor movement will not be supported\n");
|
|
ctlObj = nsnull;
|
|
}
|
|
else {
|
|
PRInt32 start, end;
|
|
PRBool needsCTL = PR_FALSE;
|
|
|
|
ctlObj->NeedsCTLFix(text, sdptr->mStart, sdptr->mEnd, &needsCTL);
|
|
|
|
if (needsCTL && (sdptr->mEnd < textLength)) {
|
|
ctlObj->GetRangeOfCluster(text, PRInt32(textLength), sdptr->mEnd,
|
|
&start, &end);
|
|
if (sdptr->mStart > sdptr->mEnd) /* Left Edge */
|
|
sdptr->mEnd = start;
|
|
else
|
|
sdptr->mEnd = end;
|
|
}
|
|
|
|
/* Always start selection from a Right Edge */
|
|
if (needsCTL && (sdptr->mStart > 0)) {
|
|
ctlObj->GetRangeOfCluster(text, PRInt32(textLength),
|
|
sdptr->mStart, &start, &end);
|
|
sdptr->mStart = end;
|
|
}
|
|
}
|
|
#endif /* SUNCTL */
|
|
#ifdef IBMBIDI
|
|
AdjustSelectionPointsForBidi(sdptr, textLength, CHARTYPE_IS_RTL(charType), isOddLevel, isBidiSystem);
|
|
#endif
|
|
sdptr = sdptr->mNext;
|
|
}
|
|
if (!hideStandardSelection || displaySelection) {
|
|
/*
|
|
* Text is drawn by drawing the entire string every time, but
|
|
* using clip regions to control which part of the text is shown
|
|
* (selected or unselected.) We do this because you can't
|
|
* assume that the layout of a part of text will be the same
|
|
* when it's drawn apart from the entire string. This is true
|
|
* in languages like arabic, where shaping affects entire words.
|
|
* Simply put: length("abcd") != length("ab") + length("cd") in
|
|
* some languages.
|
|
*/
|
|
|
|
// See if this rendering backend supports getting cluster
|
|
// information.
|
|
PRUint32 clusterHint = 0;
|
|
aRenderingContext.GetHints(clusterHint);
|
|
clusterHint &= NS_RENDERING_HINT_TEXT_CLUSTERS;
|
|
|
|
//while we have substrings...
|
|
//PRBool drawn = PR_FALSE;
|
|
DrawSelectionIterator iter(content, details,text,(PRUint32)textLength,aTextStyle, selectionValue, aPresContext, mStyleContext);
|
|
if (!iter.IsDone() && iter.First())
|
|
{
|
|
nscoord currentX = dx;
|
|
nscoord newWidth;//temp
|
|
#ifdef IBMBIDI // Simon - display substrings RTL in RTL frame
|
|
nscoord FrameWidth = 0;
|
|
if (isRightToLeftOnBidiPlatform)
|
|
if (NS_SUCCEEDED(aRenderingContext.GetWidth(text, textLength, FrameWidth)))
|
|
currentX = dx + FrameWidth;
|
|
#endif
|
|
while (!iter.IsDone())
|
|
{
|
|
PRUnichar *currenttext = iter.CurrentTextUnicharPtr();
|
|
PRUint32 currentlength= iter.CurrentLength();
|
|
//TextStyle ¤tStyle = iter.CurrentStyle();
|
|
nscolor currentFGColor, currentBKColor;
|
|
PRBool isCurrentBKColorTransparent;
|
|
|
|
PRBool isSelection = iter.GetSelectionColors(¤tFGColor,
|
|
¤tBKColor,
|
|
&isCurrentBKColorTransparent);
|
|
|
|
if (currentlength > 0)
|
|
{
|
|
if (clusterHint) {
|
|
PRUint32 tmpWidth;
|
|
rv = aRenderingContext.GetRangeWidth(text, textLength, currenttext - text,
|
|
(currenttext - text) + currentlength,
|
|
tmpWidth);
|
|
newWidth = nscoord(tmpWidth);
|
|
}
|
|
else {
|
|
rv = aRenderingContext.GetWidth(currenttext, currentlength,newWidth); //ADJUST FOR CHAR SPACING
|
|
}
|
|
if (NS_SUCCEEDED(rv)) {
|
|
if (isRightToLeftOnBidiPlatform)
|
|
currentX -= newWidth;
|
|
if (isSelection && !isPaginated)
|
|
{//DRAW RECT HERE!!!
|
|
if (!isCurrentBKColorTransparent) {
|
|
aRenderingContext.SetColor(currentBKColor);
|
|
aRenderingContext.FillRect(currentX, dy, newWidth, mRect.height);
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
newWidth = 0;
|
|
}
|
|
}
|
|
else {
|
|
newWidth = 0;
|
|
}
|
|
|
|
aRenderingContext.PushState();
|
|
|
|
nsRect rect(currentX, dy, newWidth, mRect.height);
|
|
aRenderingContext.SetClipRect(rect, nsClipCombine_kIntersect);
|
|
|
|
if (isPaginated && !iter.IsBeforeOrAfter()) {
|
|
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
|
|
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy + mAscent);
|
|
} else if (!isPaginated) {
|
|
aRenderingContext.SetColor(nsCSSRendering::TransformColor(currentFGColor,canDarkenColor));
|
|
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy + mAscent);
|
|
}
|
|
|
|
aRenderingContext.PopState();
|
|
|
|
#ifdef IBMBIDI
|
|
if (!isRightToLeftOnBidiPlatform)
|
|
#endif
|
|
currentX += newWidth; // increment twips X start
|
|
|
|
iter.Next();
|
|
}
|
|
}
|
|
else if (!isPaginated)
|
|
{
|
|
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
|
|
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy + mAscent);
|
|
}
|
|
}
|
|
PaintTextDecorations(aRenderingContext, aStyleContext, aPresContext,
|
|
aTextStyle, dx, dy, width,
|
|
isRightToLeftOnBidiPlatform, text, details, 0,
|
|
(PRUint32)textLength, nsnull);
|
|
sdptr = details;
|
|
if (details){
|
|
while ((sdptr = details->mNext) != nsnull) {
|
|
delete details;
|
|
details = sdptr;
|
|
}
|
|
delete details;
|
|
}
|
|
}
|
|
#ifdef IBMBIDI
|
|
if (isRightToLeftOnBidiPlatform) {
|
|
// indicate that future text should not be reordered with
|
|
// right-to-left base direction
|
|
aRenderingContext.SetRightToLeftText(PR_FALSE);
|
|
}
|
|
#endif // IBMBIDI
|
|
}
|
|
}
|
|
|
|
//measure Spaced Textvoid
|
|
nsresult
|
|
nsTextFrame::GetPositionSlowly(nsPresContext* aPresContext,
|
|
nsIRenderingContext* aRendContext,
|
|
const nsPoint& aPoint,
|
|
nsIContent** aNewContent,
|
|
PRInt32& aOffset)
|
|
|
|
{
|
|
// pre-condition tests
|
|
NS_PRECONDITION(aPresContext && aRendContext && aNewContent, "null arg");
|
|
if (!aPresContext || !aRendContext || !aNewContent) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
// initialize out param
|
|
*aNewContent = nsnull;
|
|
|
|
TextStyle ts(aPresContext, *aRendContext, mStyleContext);
|
|
if (!ts.mSmallCaps && !ts.mWordSpacing && !ts.mLetterSpacing && !ts.mJustifying) {
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
nsIView * view;
|
|
nsPoint origin;
|
|
GetOffsetFromView(origin, &view);
|
|
|
|
/* This if clause is the cause of much pain. If aNewContent is set, then any
|
|
* code path that returns an error must set aNewContent to null before returning,
|
|
* or risk the caller unknowingly decrementing aNewContent inappropriately.
|
|
* Here's what Robert O'Callahan has to say on the matter:
|
|
If I'm not mistaken, in GetPositionSlowly, the values of aNewContent and
|
|
aOffset set in the conditional "if (aPoint.x - origin.x < 0)" are
|
|
overwritten on all successful return paths. Since they should never be
|
|
used by the caller if the function fails, that entire "if" statement is
|
|
--- or should be --- a no-op. Come to think of it, it doesn't make sense
|
|
either; setting aOffset to zero is nonsense.
|
|
|
|
I recommend you just delete that "if" statement.
|
|
*
|
|
* If this clause is removed, then some of the bullet-proofing code
|
|
* prefaced with "bug 56704" comments can be removed as well.
|
|
*/
|
|
if (aPoint.x - origin.x < 0)
|
|
{
|
|
*aNewContent = mContent;
|
|
aOffset =0;
|
|
}
|
|
nsIDocument *doc = GetDocument(aPresContext);
|
|
|
|
// Make enough space to transform
|
|
nsAutoTextBuffer paintBuffer;
|
|
nsAutoIndexBuffer indexBuffer;
|
|
nsresult rv = indexBuffer.GrowTo(mContentLength + 1);
|
|
if (NS_FAILED(rv)) {
|
|
// If we've already assigned aNewContent, make sure to 0 it out here.
|
|
// See bug 56704.
|
|
*aNewContent = nsnull;
|
|
return rv;
|
|
}
|
|
|
|
// Transform text from content into renderable form
|
|
nsTextTransformer tx(doc->GetLineBreaker(), nsnull, aPresContext);
|
|
PRInt32 textLength;
|
|
PRIntn numJustifiableCharacter;
|
|
|
|
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength, PR_TRUE, &numJustifiableCharacter);
|
|
if (textLength <= 0) {
|
|
// If we've already assigned aNewContent, make sure to 0 it out here.
|
|
// aNewContent is undefined in the case that we return a failure,
|
|
// If we were to return a valid pointer, we risk decrementing that node's
|
|
// ref count an extra time by the caller.
|
|
// See bug 56704 for more details.
|
|
*aNewContent = nsnull;
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
#ifdef IBMBIDI // Simon -- reverse RTL text here
|
|
PRBool isOddLevel = NS_GET_EMBEDDING_LEVEL(this) & 1;
|
|
if (isOddLevel) {
|
|
PRUnichar *tStart, *tEnd;
|
|
PRUnichar tSwap;
|
|
for (tStart = paintBuffer.mBuffer, tEnd = tStart + textLength - 1; tEnd > tStart; tStart++, tEnd--) {
|
|
tSwap = *tStart;
|
|
*tStart = *tEnd;
|
|
*tEnd = tSwap;
|
|
}
|
|
}
|
|
#endif // IBMBIDI
|
|
|
|
ComputeExtraJustificationSpacing(*aRendContext, ts, paintBuffer.mBuffer, textLength, numJustifiableCharacter);
|
|
|
|
//IF STYLE SAYS TO SELECT TO END OF FRAME HERE...
|
|
PRInt32 prefInt =
|
|
nsContentUtils::GetIntPref("browser.drag_out_of_frame_style");
|
|
|
|
PRBool outofstylehandled = PR_FALSE;
|
|
|
|
if (prefInt)
|
|
{
|
|
if (aPoint.y < origin.y)//above rectangle
|
|
{
|
|
aOffset = mContentOffset;
|
|
outofstylehandled = PR_TRUE;
|
|
}
|
|
else if ((aPoint.y - origin.y) > mRect.height)
|
|
{
|
|
aOffset = mContentOffset + mContentLength;
|
|
outofstylehandled = PR_TRUE;
|
|
}
|
|
}
|
|
|
|
if (!outofstylehandled) //then we drag to closest X point and dont worry about the 'Y'
|
|
//END STYLE RULE
|
|
{
|
|
//the following will first get the index into the PAINTBUFFER then the actual content
|
|
nscoord adjustedX = PR_MAX(0,aPoint.x-origin.x);
|
|
|
|
#ifdef IBMBIDI
|
|
if (isOddLevel)
|
|
aOffset = mContentOffset + textLength -
|
|
GetLengthSlowly(*aRendContext, ts, paintBuffer.mBuffer,
|
|
textLength, PR_TRUE, adjustedX);
|
|
else
|
|
#endif
|
|
aOffset = mContentOffset +
|
|
GetLengthSlowly(*aRendContext, ts,paintBuffer.mBuffer,
|
|
textLength, PR_TRUE, adjustedX);
|
|
PRInt32 i;
|
|
PRInt32* ip = indexBuffer.mBuffer;
|
|
for (i = 0;i <= mContentLength; i ++){
|
|
if ((ip[i] >= aOffset) && //reverse mapping
|
|
(! IS_LOW_SURROGATE(paintBuffer.mBuffer[ip[i]-mContentOffset]))) {
|
|
aOffset = i + mContentOffset;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
*aNewContent = mContent;
|
|
if (*aNewContent)
|
|
(*aNewContent)->AddRef();
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsTextFrame::RenderString(nsIRenderingContext& aRenderingContext,
|
|
nsStyleContext* aStyleContext,
|
|
nsPresContext* aPresContext,
|
|
TextPaintStyle& aTextStyle,
|
|
PRBool aRightToLeftText,
|
|
PRUnichar* aBuffer, PRInt32 aLength, PRBool aIsEndOfFrame,
|
|
nscoord aX, nscoord aY,
|
|
nscoord aWidth,
|
|
SelectionDetails *aDetails /*=nsnull*/)
|
|
{
|
|
PRUnichar buf[TEXT_BUF_SIZE];
|
|
PRUnichar* bp0 = buf;
|
|
|
|
nscoord spacingMem[TEXT_BUF_SIZE];
|
|
nscoord* sp0 = spacingMem;
|
|
|
|
PRBool spacing = (0 != aTextStyle.mLetterSpacing) ||
|
|
(0 != aTextStyle.mWordSpacing) || aTextStyle.mJustifying;
|
|
|
|
PRBool justifying = aTextStyle.mJustifying &&
|
|
(aTextStyle.mNumJustifiableCharacterReceivingExtraJot != 0 || aTextStyle.mExtraSpacePerJustifiableCharacter != 0);
|
|
|
|
PRBool isCJ = IsChineseJapaneseLangGroup();
|
|
PRBool isEndOfLine = aIsEndOfFrame && IsEndOfLine(mState);
|
|
|
|
//German 0x00df might expand to "SS", but no need to count it for speed reason
|
|
if (aTextStyle.mSmallCaps) {
|
|
if (aLength*2 > TEXT_BUF_SIZE) {
|
|
bp0 = new PRUnichar[aLength*2];
|
|
if (spacing)
|
|
sp0 = new nscoord[aLength*2];
|
|
}
|
|
}
|
|
else if (aLength > TEXT_BUF_SIZE) {
|
|
bp0 = new PRUnichar[aLength];
|
|
if (spacing)
|
|
sp0 = new nscoord[aLength];
|
|
}
|
|
|
|
PRUnichar* bp = bp0;
|
|
nscoord* sp = sp0;
|
|
|
|
nsIFontMetrics* lastFont = aTextStyle.mLastFont;
|
|
PRInt32 pendingCount;
|
|
PRUnichar* runStart = bp;
|
|
nscoord charWidth, width = 0;
|
|
PRInt32 countSoFar = 0;
|
|
// Save the color we want to use for the text, since calls to
|
|
// PaintTextDecorations in this method will call SetColor() on the rendering
|
|
// context.
|
|
nscolor textColor;
|
|
aRenderingContext.GetColor(textColor);
|
|
for (; --aLength >= 0; aBuffer++) {
|
|
nsIFontMetrics* nextFont;
|
|
nscoord glyphWidth = 0;
|
|
PRUnichar ch = *aBuffer;
|
|
if (aTextStyle.mSmallCaps &&
|
|
(IsLowerCase(ch) || (ch == kSZLIG))) {
|
|
nextFont = aTextStyle.mSmallFont;
|
|
}
|
|
else {
|
|
nextFont = aTextStyle.mNormalFont;
|
|
}
|
|
if (nextFont != lastFont) {
|
|
pendingCount = bp - runStart;
|
|
if (0 != pendingCount) {
|
|
// Render the text with the color specified first.
|
|
aRenderingContext.SetColor(textColor);
|
|
// Measure previous run of characters using the previous font
|
|
aRenderingContext.DrawString(runStart, pendingCount,
|
|
aX, aY + mAscent, -1,
|
|
spacing ? sp0 : nsnull);
|
|
|
|
// Note: use aY not small-y so that decorations are drawn with
|
|
// respect to the normal-font not the current font.
|
|
PaintTextDecorations(aRenderingContext, aStyleContext, aPresContext,
|
|
aTextStyle, aX, aY, width,
|
|
aRightToLeftText, runStart, aDetails,
|
|
countSoFar, pendingCount, spacing ? sp0 : nsnull);
|
|
countSoFar += pendingCount;
|
|
aWidth -= width;
|
|
aX += width;
|
|
runStart = bp = bp0;
|
|
sp = sp0;
|
|
width = 0;
|
|
}
|
|
aRenderingContext.SetFont(nextFont);
|
|
lastFont = nextFont;
|
|
}
|
|
if (nextFont == aTextStyle.mSmallFont) {
|
|
PRUnichar upper_ch;
|
|
// German szlig should be expanded to "SS".
|
|
if (ch == kSZLIG)
|
|
upper_ch = (PRUnichar)'S';
|
|
else
|
|
upper_ch = ToUpperCase(ch);
|
|
aRenderingContext.GetWidth(upper_ch, charWidth);
|
|
glyphWidth += charWidth + aTextStyle.mLetterSpacing;
|
|
if (ch == kSZLIG) //add an additional 'S' here.
|
|
{
|
|
*bp++ = upper_ch;
|
|
if (spacing)
|
|
*sp++ = glyphWidth;
|
|
width += glyphWidth;
|
|
}
|
|
ch = upper_ch;
|
|
}
|
|
else if (ch == ' ') {
|
|
glyphWidth += aTextStyle.mSpaceWidth + aTextStyle.mWordSpacing + aTextStyle.mLetterSpacing;
|
|
}
|
|
else if (IS_HIGH_SURROGATE(ch) && aLength > 0 &&
|
|
IS_LOW_SURROGATE(*(aBuffer+1))) {
|
|
|
|
// special handling for surrogate pair
|
|
aRenderingContext.GetWidth(aBuffer, 2, charWidth);
|
|
glyphWidth += charWidth + aTextStyle.mLetterSpacing;
|
|
// copy the surrogate low
|
|
*bp++ = ch;
|
|
--aLength;
|
|
aBuffer++;
|
|
ch = *aBuffer;
|
|
// put the width into the space buffer
|
|
width += glyphWidth;
|
|
if (spacing)
|
|
*sp++ = glyphWidth;
|
|
// set the glyphWidth to 0 so the code later will
|
|
// set a 0 for one element in space array for surrogate low to 0
|
|
glyphWidth = 0;
|
|
}
|
|
else {
|
|
aRenderingContext.GetWidth(ch, charWidth);
|
|
glyphWidth += charWidth + aTextStyle.mLetterSpacing;
|
|
}
|
|
if (justifying && (!isEndOfLine || aLength > 0)
|
|
&& IsJustifiableCharacter(ch, isCJ)) {
|
|
glyphWidth += aTextStyle.mExtraSpacePerJustifiableCharacter;
|
|
if ((PRUint32)--aTextStyle.mNumJustifiableCharacterToRender
|
|
< (PRUint32)aTextStyle.mNumJustifiableCharacterReceivingExtraJot) {
|
|
glyphWidth++;
|
|
}
|
|
}
|
|
*bp++ = ch;
|
|
if (spacing)
|
|
*sp++ = glyphWidth;
|
|
width += glyphWidth;
|
|
}
|
|
pendingCount = bp - runStart;
|
|
if (0 != pendingCount) {
|
|
// Render the text with the color specified first.
|
|
aRenderingContext.SetColor(textColor);
|
|
// Measure previous run of characters using the previous font
|
|
aRenderingContext.DrawString(runStart, pendingCount, aX, aY + mAscent, -1,
|
|
spacing ? sp0 : nsnull);
|
|
|
|
// Note: use aY not small-y so that decorations are drawn with
|
|
// respect to the normal-font not the current font.
|
|
PaintTextDecorations(aRenderingContext, aStyleContext, aPresContext,
|
|
aTextStyle, aX, aY, aWidth,
|
|
aRightToLeftText, runStart, aDetails,
|
|
countSoFar, pendingCount, spacing ? sp0 : nsnull);
|
|
}
|
|
aTextStyle.mLastFont = lastFont;
|
|
|
|
if (bp0 != buf) {
|
|
delete [] bp0;
|
|
}
|
|
if (sp0 != spacingMem) {
|
|
delete [] sp0;
|
|
}
|
|
}
|
|
|
|
inline void
|
|
nsTextFrame::MeasureSmallCapsText(const nsHTMLReflowState& aReflowState,
|
|
TextStyle& aTextStyle,
|
|
PRUnichar* aWord,
|
|
PRInt32 aWordLength,
|
|
PRBool aIsEndOfFrame,
|
|
nsTextDimensions* aDimensionsResult)
|
|
{
|
|
nsIRenderingContext& rc = *aReflowState.rendContext;
|
|
aDimensionsResult->Clear();
|
|
GetTextDimensions(rc, aTextStyle, aWord, aWordLength, aIsEndOfFrame, aDimensionsResult);
|
|
if (aTextStyle.mLastFont != aTextStyle.mNormalFont) {
|
|
rc.SetFont(aTextStyle.mNormalFont);
|
|
aTextStyle.mLastFont = aTextStyle.mNormalFont;
|
|
}
|
|
}
|
|
|
|
|
|
PRInt32
|
|
nsTextFrame::GetTextDimensionsOrLength(nsIRenderingContext& aRenderingContext,
|
|
TextStyle& aStyle,
|
|
PRUnichar* aBuffer, PRInt32 aLength, PRBool aIsEndOfFrame,
|
|
nsTextDimensions* aDimensionsResult,
|
|
PRBool aGetTextDimensions/* true=get dimensions false = return length up to aDimensionsResult.width size*/)
|
|
{
|
|
PRUnichar *inBuffer = aBuffer;
|
|
PRInt32 length = aLength;
|
|
nsAutoTextBuffer dimensionsBuffer;
|
|
if (NS_FAILED(dimensionsBuffer.GrowTo(length))) {
|
|
aDimensionsResult->Clear();
|
|
return 0;
|
|
}
|
|
PRUnichar* bp = dimensionsBuffer.mBuffer;
|
|
|
|
nsIFontMetrics* lastFont = aStyle.mLastFont;
|
|
nsTextDimensions sum, glyphDimensions;
|
|
PRBool justifying = aStyle.mJustifying &&
|
|
(aStyle.mNumJustifiableCharacterReceivingExtraJot != 0 || aStyle.mExtraSpacePerJustifiableCharacter != 0);
|
|
PRBool isCJ = IsChineseJapaneseLangGroup();
|
|
PRBool isEndOfLine = aIsEndOfFrame && IsEndOfLine(mState);
|
|
|
|
for (PRInt32 prevLength = length; --length >= 0; prevLength = length) {
|
|
PRUnichar ch = *inBuffer++;
|
|
if (aStyle.mSmallCaps &&
|
|
(IsLowerCase(ch) || (ch == kSZLIG))) {
|
|
PRUnichar upper_ch;
|
|
// German szlig should be expanded to "SS".
|
|
if (ch == kSZLIG)
|
|
upper_ch = (PRUnichar)'S';
|
|
else
|
|
upper_ch = ToUpperCase(ch);
|
|
if (lastFont != aStyle.mSmallFont) {
|
|
lastFont = aStyle.mSmallFont;
|
|
aRenderingContext.SetFont(lastFont);
|
|
}
|
|
aRenderingContext.GetTextDimensions(&upper_ch, (PRUint32)1, glyphDimensions);
|
|
glyphDimensions.width += aStyle.mLetterSpacing;
|
|
if (ch == kSZLIG)
|
|
glyphDimensions.width += glyphDimensions.width;
|
|
}
|
|
else if (ch == ' ') {
|
|
glyphDimensions.width = aStyle.mSpaceWidth + aStyle.mLetterSpacing
|
|
+ aStyle.mWordSpacing;
|
|
}
|
|
else {
|
|
if (lastFont != aStyle.mNormalFont) {
|
|
lastFont = aStyle.mNormalFont;
|
|
aRenderingContext.SetFont(lastFont);
|
|
}
|
|
if (IS_HIGH_SURROGATE(ch) && length > 0 &&
|
|
IS_LOW_SURROGATE(*inBuffer)) {
|
|
aRenderingContext.GetTextDimensions(inBuffer-1, (PRUint32)2, glyphDimensions);
|
|
length--;
|
|
inBuffer++;
|
|
} else {
|
|
aRenderingContext.GetTextDimensions(&ch, (PRUint32)1, glyphDimensions);
|
|
}
|
|
glyphDimensions.width += aStyle.mLetterSpacing;
|
|
}
|
|
if (justifying && (!isEndOfLine || length > 0)
|
|
&& IsJustifiableCharacter(ch, isCJ)) {
|
|
glyphDimensions.width += aStyle.mExtraSpacePerJustifiableCharacter;
|
|
if ((PRUint32)--aStyle.mNumJustifiableCharacterToMeasure
|
|
< (PRUint32)aStyle.mNumJustifiableCharacterReceivingExtraJot) {
|
|
++glyphDimensions.width;
|
|
}
|
|
}
|
|
sum.Combine(glyphDimensions);
|
|
*bp++ = ch;
|
|
if (!aGetTextDimensions && sum.width >= aDimensionsResult->width) {
|
|
PRInt32 result = aLength - length;
|
|
if (2*(sum.width - aDimensionsResult->width) > glyphDimensions.width) //then we have gone too far, back up 1
|
|
result = aLength - prevLength;
|
|
aStyle.mLastFont = lastFont;
|
|
return result;
|
|
}
|
|
}
|
|
aStyle.mLastFont = lastFont;
|
|
*aDimensionsResult = sum;
|
|
return aLength;
|
|
}
|
|
|
|
|
|
// XXX factor in logic from RenderString into here; gaps, justification, etc.
|
|
void
|
|
nsTextFrame::GetTextDimensions(nsIRenderingContext& aRenderingContext,
|
|
TextStyle& aTextStyle,
|
|
PRUnichar* aBuffer, PRInt32 aLength, PRBool aIsEndOfFrame,
|
|
nsTextDimensions* aDimensionsResult)
|
|
{
|
|
GetTextDimensionsOrLength(aRenderingContext,aTextStyle,
|
|
aBuffer,aLength,aIsEndOfFrame,aDimensionsResult,PR_TRUE);
|
|
}
|
|
|
|
PRInt32
|
|
nsTextFrame::GetLengthSlowly(nsIRenderingContext& aRenderingContext,
|
|
TextStyle& aStyle,
|
|
PRUnichar* aBuffer, PRInt32 aLength, PRBool aIsEndOfFrame,
|
|
nscoord aWidth)
|
|
{
|
|
nsTextDimensions dimensions;
|
|
dimensions.width = aWidth;
|
|
return GetTextDimensionsOrLength(aRenderingContext,aStyle,
|
|
aBuffer,aLength,aIsEndOfFrame,&dimensions,PR_FALSE);
|
|
}
|
|
|
|
void
|
|
nsTextFrame::ComputeExtraJustificationSpacing(nsIRenderingContext& aRenderingContext,
|
|
TextStyle& aTextStyle,
|
|
PRUnichar* aBuffer, PRInt32 aLength,
|
|
PRInt32 aNumJustifiableCharacter)
|
|
{
|
|
if (aTextStyle.mJustifying) {
|
|
nsTextDimensions trueDimensions;
|
|
|
|
// OK, so this is a bit ugly. The problem is that to get the right margin
|
|
// nice and clean, we have to apply a little extra space to *some* of the
|
|
// justifiable characters. It has to be the same ones every time or things will go haywire.
|
|
// This implies that the GetTextDimensionsOrLength and RenderString functions depend
|
|
// on a little bit of secret state: which part of the prepared text they are
|
|
// looking at. It turns out that they get called in a regular way: they look
|
|
// at the text from the beginning to the end. So we just count which justifiable character
|
|
// we're up to, for each context.
|
|
// This is not a great solution, but a perfect solution requires much more
|
|
// widespread changes, to explicitly annotate all the transformed text fragments
|
|
// that are passed around with their position in the transformed text
|
|
// for the entire frame.
|
|
aTextStyle.mNumJustifiableCharacterToMeasure = 0;
|
|
aTextStyle.mExtraSpacePerJustifiableCharacter = 0;
|
|
aTextStyle.mNumJustifiableCharacterReceivingExtraJot = 0;
|
|
|
|
GetTextDimensions(aRenderingContext, aTextStyle, aBuffer, aLength, PR_TRUE, &trueDimensions);
|
|
|
|
aTextStyle.mNumJustifiableCharacterToMeasure = aNumJustifiableCharacter;
|
|
aTextStyle.mNumJustifiableCharacterToRender = aNumJustifiableCharacter;
|
|
|
|
nscoord extraSpace = mRect.width - trueDimensions.width;
|
|
|
|
if (extraSpace > 0 && aNumJustifiableCharacter > 0) {
|
|
aTextStyle.mExtraSpacePerJustifiableCharacter = extraSpace/aNumJustifiableCharacter;
|
|
aTextStyle.mNumJustifiableCharacterReceivingExtraJot =
|
|
extraSpace - aTextStyle.mExtraSpacePerJustifiableCharacter*aNumJustifiableCharacter;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsTextFrame::PaintTextSlowly(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
nsStyleContext* aStyleContext,
|
|
TextPaintStyle& aTextStyle,
|
|
nscoord dx, nscoord dy)
|
|
{
|
|
nsCOMPtr<nsISelectionController> selCon;
|
|
nsCOMPtr<nsIPresShell> shell;
|
|
PRBool displaySelection;
|
|
PRBool isPaginated,canDarkenColor=PR_FALSE;
|
|
PRBool isSelected;
|
|
PRBool hideStandardSelection;
|
|
PRInt16 selectionValue;
|
|
nsCOMPtr<nsILineBreaker> lb;
|
|
if (NS_FAILED(GetTextInfoForPainting(aPresContext,
|
|
aRenderingContext,
|
|
getter_AddRefs(shell),
|
|
getter_AddRefs(selCon),
|
|
displaySelection,
|
|
isPaginated,
|
|
isSelected,
|
|
hideStandardSelection,
|
|
selectionValue,
|
|
getter_AddRefs(lb)))) {
|
|
return;
|
|
}
|
|
|
|
|
|
if(isPaginated){
|
|
canDarkenColor = CanDarken(aPresContext);
|
|
}
|
|
|
|
// Make enough space to transform
|
|
nsAutoTextBuffer paintBuffer;
|
|
nsAutoIndexBuffer indexBuffer;
|
|
if (NS_FAILED(indexBuffer.GrowTo(mContentLength + 1))) {
|
|
return;
|
|
}
|
|
nscoord width = mRect.width;
|
|
PRInt32 textLength;
|
|
|
|
nsTextTransformer tx(lb, nsnull, aPresContext);
|
|
PRIntn numJustifiableCharacter;
|
|
|
|
PrepareUnicodeText(tx, (displaySelection ? &indexBuffer : nsnull),
|
|
&paintBuffer, &textLength, PR_TRUE, &numJustifiableCharacter);
|
|
|
|
PRInt32* ip = indexBuffer.mBuffer;
|
|
PRUnichar* text = paintBuffer.mBuffer;
|
|
|
|
if (0 != textLength) {
|
|
#ifdef IBMBIDI
|
|
PRBool isRightToLeftOnBidiPlatform = PR_FALSE;
|
|
PRBool isBidiSystem = PR_FALSE;
|
|
PRBool isOddLevel = PR_FALSE;
|
|
PRUint32 hints = 0;
|
|
aRenderingContext.GetHints(hints);
|
|
PRBool paintCharByChar = (0 == (hints & NS_RENDERING_HINT_REORDER_SPACED_TEXT)) &&
|
|
((0 != aTextStyle.mLetterSpacing) ||
|
|
(0 != aTextStyle.mWordSpacing) ||
|
|
aTextStyle.mJustifying);
|
|
nsCharType charType = eCharType_LeftToRight;
|
|
|
|
if (aPresContext->BidiEnabled()) {
|
|
isBidiSystem = aPresContext->IsBidiSystem();
|
|
nsBidiPresUtils* bidiUtils = aPresContext->GetBidiUtils();
|
|
|
|
if (bidiUtils) {
|
|
isOddLevel = NS_GET_EMBEDDING_LEVEL(this) & 1;
|
|
charType = (nsCharType)NS_PTR_TO_INT32(aPresContext->PropertyTable()->GetProperty(this, nsLayoutAtoms::charType));
|
|
#ifdef DEBUG
|
|
PRInt32 rememberTextLength = textLength;
|
|
#endif
|
|
isRightToLeftOnBidiPlatform = (!paintCharByChar &&
|
|
isBidiSystem &&
|
|
(eCharType_RightToLeft == charType ||
|
|
eCharType_RightToLeftArabic == charType));
|
|
if (isRightToLeftOnBidiPlatform) {
|
|
// indicate that the platform should use its native
|
|
// capabilities to reorder the text with right-to-left
|
|
// base direction
|
|
aRenderingContext.SetRightToLeftText(PR_TRUE);
|
|
}
|
|
// If we will be painting char by char, handle the text like on non-bidi platform
|
|
bidiUtils->ReorderUnicodeText(text, textLength, charType,
|
|
isOddLevel, (paintCharByChar) ? PR_FALSE : isBidiSystem);
|
|
NS_ASSERTION(rememberTextLength == textLength, "Bidi formatting changed text length");
|
|
}
|
|
}
|
|
#endif // IBMBIDI
|
|
ComputeExtraJustificationSpacing(aRenderingContext, aTextStyle, text, textLength, numJustifiableCharacter);
|
|
if (!displaySelection || !isSelected) {
|
|
// When there is no selection showing, use the fastest and
|
|
// simplest rendering approach
|
|
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
|
|
RenderString(aRenderingContext, aStyleContext, aPresContext, aTextStyle,
|
|
PR_FALSE, text, textLength, PR_TRUE, dx, dy, width);
|
|
}
|
|
else
|
|
{
|
|
SelectionDetails *details = nsnull;
|
|
nsCOMPtr<nsIFrameSelection> frameSelection;
|
|
//get the frame selection
|
|
nsresult rv = NS_OK;
|
|
frameSelection = do_QueryInterface(selCon); //this MAY implement
|
|
if (!frameSelection)//if that failed get it from the presshell
|
|
frameSelection = shell->FrameSelection();
|
|
nsCOMPtr<nsIContent> content;
|
|
PRInt32 offset;
|
|
PRInt32 length;
|
|
|
|
rv = GetContentAndOffsetsForSelection(aPresContext,
|
|
getter_AddRefs(content),
|
|
&offset, &length);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
rv = frameSelection->LookUpSelection(content, mContentOffset,
|
|
mContentLength, &details,
|
|
PR_FALSE);
|
|
}
|
|
|
|
//where are the selection points "really"
|
|
SelectionDetails *sdptr = details;
|
|
while (sdptr){
|
|
sdptr->mStart = ip[sdptr->mStart] - mContentOffset;
|
|
sdptr->mEnd = ip[sdptr->mEnd] - mContentOffset;
|
|
#ifdef IBMBIDI
|
|
AdjustSelectionPointsForBidi(sdptr, textLength,
|
|
CHARTYPE_IS_RTL(charType), isOddLevel,
|
|
(paintCharByChar) ? PR_FALSE : isBidiSystem);
|
|
#endif
|
|
sdptr = sdptr->mNext;
|
|
}
|
|
|
|
DrawSelectionIterator iter(content, details,text,(PRUint32)textLength,aTextStyle, selectionValue, aPresContext, mStyleContext);
|
|
if (!iter.IsDone() && iter.First())
|
|
{
|
|
nscoord currentX = dx;
|
|
nsTextDimensions newDimensions;//temp
|
|
#ifdef IBMBIDI // Simon - display substrings RTL in RTL frame
|
|
if (isRightToLeftOnBidiPlatform)
|
|
{
|
|
nsTextDimensions frameDimensions;
|
|
GetTextDimensions(aRenderingContext, aTextStyle, text,
|
|
(PRInt32)textLength, iter.IsLast(), &frameDimensions);
|
|
currentX = dx + frameDimensions.width;
|
|
}
|
|
#endif
|
|
while (!iter.IsDone())
|
|
{
|
|
PRUnichar *currenttext = iter.CurrentTextUnicharPtr();
|
|
PRUint32 currentlength= iter.CurrentLength();
|
|
//TextStyle ¤tStyle = iter.CurrentStyle();
|
|
nscolor currentFGColor, currentBKColor;
|
|
PRBool isCurrentBKColorTransparent;
|
|
PRBool isSelection = iter.GetSelectionColors(¤tFGColor,
|
|
¤tBKColor,
|
|
&isCurrentBKColorTransparent);
|
|
PRBool isEndOfFrame = iter.IsLast();
|
|
GetTextDimensions(aRenderingContext, aTextStyle, currenttext,
|
|
(PRInt32)currentlength, isEndOfFrame, &newDimensions);
|
|
if (newDimensions.width)
|
|
{
|
|
#ifdef IBMBIDI
|
|
if (isRightToLeftOnBidiPlatform)
|
|
currentX -= newDimensions.width;
|
|
#endif
|
|
if (isSelection && !isPaginated)
|
|
{//DRAW RECT HERE!!!
|
|
if (!isCurrentBKColorTransparent) {
|
|
aRenderingContext.SetColor(currentBKColor);
|
|
aRenderingContext.FillRect(currentX, dy, newDimensions.width, mRect.height);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (isPaginated && !iter.IsBeforeOrAfter()) {
|
|
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor, canDarkenColor));
|
|
RenderString(aRenderingContext, aStyleContext, aPresContext,
|
|
aTextStyle, isRightToLeftOnBidiPlatform,
|
|
currenttext, currentlength, isEndOfFrame,
|
|
currentX, dy, newDimensions.width, details);
|
|
} else if (!isPaginated) {
|
|
aRenderingContext.SetColor(nsCSSRendering::TransformColor(currentFGColor, canDarkenColor));
|
|
RenderString(aRenderingContext,aStyleContext, aPresContext,
|
|
aTextStyle, isRightToLeftOnBidiPlatform,
|
|
currenttext, currentlength, isEndOfFrame,
|
|
currentX, dy, newDimensions.width, details);
|
|
}
|
|
|
|
#ifdef IBMBIDI
|
|
if (!isRightToLeftOnBidiPlatform)
|
|
#endif
|
|
// increment twips X start but remember to get ready for
|
|
// next draw by reducing current x by letter spacing amount
|
|
currentX += newDimensions.width; // + aTextStyle.mLetterSpacing;
|
|
|
|
iter.Next();
|
|
}
|
|
}
|
|
else if (!isPaginated)
|
|
{
|
|
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
|
|
RenderString(aRenderingContext, aStyleContext, aPresContext,
|
|
aTextStyle, isRightToLeftOnBidiPlatform, text,
|
|
PRUint32(textLength), PR_TRUE, dx, dy, width, details);
|
|
}
|
|
sdptr = details;
|
|
if (details){
|
|
while ((sdptr = details->mNext) != nsnull) {
|
|
delete details;
|
|
details = sdptr;
|
|
}
|
|
delete details;
|
|
}
|
|
}
|
|
#ifdef IBMBIDI
|
|
if (isRightToLeftOnBidiPlatform) {
|
|
// indicate that future text should not be reordered with
|
|
// right-to-left base direction
|
|
aRenderingContext.SetRightToLeftText(PR_FALSE);
|
|
}
|
|
#endif // IBMBIDI
|
|
}
|
|
}
|
|
|
|
void
|
|
nsTextFrame::PaintAsciiText(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRenderingContext,
|
|
nsStyleContext* aStyleContext,
|
|
TextPaintStyle& aTextStyle,
|
|
nscoord dx, nscoord dy)
|
|
{
|
|
NS_PRECONDITION(0 == (TEXT_HAS_MULTIBYTE & mState), "text is multi-byte");
|
|
|
|
nsCOMPtr<nsISelectionController> selCon;
|
|
nsCOMPtr<nsIPresShell> shell;
|
|
PRBool displaySelection,canDarkenColor=PR_FALSE;
|
|
PRBool isPaginated;
|
|
PRBool isSelected;
|
|
PRBool hideStandardSelection;
|
|
PRInt16 selectionValue;
|
|
nsCOMPtr<nsILineBreaker> lb;
|
|
if (NS_FAILED(GetTextInfoForPainting(aPresContext,
|
|
aRenderingContext,
|
|
getter_AddRefs(shell),
|
|
getter_AddRefs(selCon),
|
|
displaySelection,
|
|
isPaginated,
|
|
isSelected,
|
|
hideStandardSelection,
|
|
selectionValue,
|
|
getter_AddRefs(lb)))) {
|
|
return;
|
|
}
|
|
|
|
if(isPaginated){
|
|
canDarkenColor = CanDarken(aPresContext);
|
|
}
|
|
|
|
// Get the text fragment
|
|
nsCOMPtr<nsITextContent> tc = do_QueryInterface(mContent);
|
|
const nsTextFragment* frag = nsnull;
|
|
if (tc) {
|
|
frag = tc->Text();
|
|
|
|
if (!frag) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Make enough space to transform
|
|
nsAutoTextBuffer unicodePaintBuffer;
|
|
nsAutoIndexBuffer indexBuffer;
|
|
if (displaySelection) {
|
|
if (NS_FAILED(indexBuffer.GrowTo(mContentLength + 1))) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
nsTextTransformer tx(lb, nsnull, aPresContext);
|
|
|
|
// See if we need to transform the text. If the text fragment is ascii and
|
|
// wasn't transformed, then we can skip this step. If we're displaying the
|
|
// selection and the text is selected, then we need to do this step so we
|
|
// can create the index buffer
|
|
PRInt32 textLength = 0;
|
|
const char* text;
|
|
char paintBufMem[TEXT_BUF_SIZE];
|
|
char* paintBuf = paintBufMem;
|
|
if (frag->Is2b() ||
|
|
(0 != (mState & TEXT_WAS_TRANSFORMED)) ||
|
|
(displaySelection && isSelected)) {
|
|
|
|
// Transform text from content into Unicode renderable form
|
|
// XXX If the text fragment is ascii, then we should ask the
|
|
// text transformer to leave the text in ascii. That way we can
|
|
// elimninate the conversion from Unicode back to ascii...
|
|
PrepareUnicodeText(tx, (displaySelection ? &indexBuffer : nsnull),
|
|
&unicodePaintBuffer, &textLength);
|
|
|
|
|
|
// Translate unicode data into ascii for rendering
|
|
if (textLength > TEXT_BUF_SIZE) {
|
|
paintBuf = new char[textLength];
|
|
if (!paintBuf) {
|
|
return;
|
|
}
|
|
}
|
|
char* dst = paintBuf;
|
|
char* end = dst + textLength;
|
|
PRUnichar* src = unicodePaintBuffer.mBuffer;
|
|
while (dst < end) {
|
|
*dst++ = (char) ((unsigned char) *src++);
|
|
}
|
|
|
|
text = paintBuf;
|
|
|
|
}
|
|
else if (mContentOffset + mContentLength <= frag->GetLength()) {
|
|
text = frag->Get1b() + mContentOffset;
|
|
textLength = mContentLength;
|
|
|
|
// See if we should skip leading whitespace
|
|
if (0 != (mState & TEXT_SKIP_LEADING_WS)) {
|
|
while ((textLength > 0) && XP_IS_SPACE(*text)) {
|
|
text++;
|
|
textLength--;
|
|
}
|
|
}
|
|
|
|
// See if the text ends in a newline
|
|
if ((textLength > 0) && (text[textLength - 1] == '\n')) {
|
|
textLength--;
|
|
}
|
|
NS_ASSERTION(textLength >= 0, "bad text length");
|
|
}
|
|
else {
|
|
// This might happen if a paint event beats the reflow; e.g., as
|
|
// is the case in bug 73291. Not a big deal, because the reflow
|
|
// will schedule another invalidate.
|
|
NS_WARNING("content length exceeds fragment length");
|
|
}
|
|
|
|
nscoord width = mRect.width;
|
|
PRInt32* ip = indexBuffer.mBuffer;
|
|
|
|
if (0 != textLength) {
|
|
if (!displaySelection || !isSelected) {
|
|
//if selection is > content length then selection has "slid off"
|
|
// When there is no selection showing, use the fastest and
|
|
// simplest rendering approach
|
|
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
|
|
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy + mAscent);
|
|
PaintTextDecorations(aRenderingContext, aStyleContext,
|
|
aPresContext, aTextStyle, dx, dy, width, PR_FALSE);
|
|
}
|
|
else {
|
|
SelectionDetails *details;
|
|
nsCOMPtr<nsIFrameSelection> frameSelection;
|
|
//get the frame selection
|
|
frameSelection = do_QueryInterface(selCon); //this MAY implement
|
|
nsresult rv = NS_OK;
|
|
if (!frameSelection)//if that failed get it from the presshell
|
|
frameSelection = shell->FrameSelection();
|
|
nsCOMPtr<nsIContent> content;
|
|
PRInt32 offset;
|
|
PRInt32 length;
|
|
|
|
rv = GetContentAndOffsetsForSelection(aPresContext,
|
|
getter_AddRefs(content),
|
|
&offset, &length);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
rv = frameSelection->LookUpSelection(content, mContentOffset,
|
|
mContentLength, &details,
|
|
PR_FALSE);
|
|
}
|
|
|
|
//where are the selection points "really"
|
|
SelectionDetails *sdptr = details;
|
|
while (sdptr){
|
|
sdptr->mStart = ip[sdptr->mStart] - mContentOffset;
|
|
sdptr->mEnd = ip[sdptr->mEnd] - mContentOffset;
|
|
sdptr = sdptr->mNext;
|
|
}
|
|
|
|
if (!hideStandardSelection || displaySelection) {
|
|
//ITS OK TO CAST HERE THE RESULT WE USE WILLNOT DO BAD CONVERSION
|
|
DrawSelectionIterator iter(content, details,(PRUnichar *)text,(PRUint32)textLength,aTextStyle,
|
|
selectionValue, aPresContext, mStyleContext);
|
|
|
|
// See if this rendering backend supports getting cluster
|
|
// information.
|
|
PRUint32 clusterHint = 0;
|
|
aRenderingContext.GetHints(clusterHint);
|
|
clusterHint &= NS_RENDERING_HINT_TEXT_CLUSTERS;
|
|
|
|
nscoord foo;
|
|
aRenderingContext.GetWidth(text, textLength, foo);
|
|
|
|
if (!iter.IsDone() && iter.First())
|
|
{
|
|
nscoord currentX = dx;
|
|
nscoord newWidth;//temp
|
|
while (!iter.IsDone())
|
|
{
|
|
char *currenttext = iter.CurrentTextCStrPtr();
|
|
PRUint32 currentlength= iter.CurrentLength();
|
|
//TextStyle ¤tStyle = iter.CurrentStyle();
|
|
nscolor currentFGColor, currentBKColor;
|
|
PRBool isCurrentBKColorTransparent;
|
|
|
|
if (clusterHint) {
|
|
PRUint32 tmpWidth;
|
|
rv = aRenderingContext.GetRangeWidth(text, textLength, currenttext - text,
|
|
(currenttext - text) + currentlength,
|
|
tmpWidth);
|
|
newWidth = nscoord(tmpWidth);
|
|
}
|
|
else {
|
|
rv = aRenderingContext.GetWidth(currenttext, currentlength,newWidth); //ADJUST FOR CHAR SPACING
|
|
}
|
|
|
|
PRBool isSelection = iter.GetSelectionColors(¤tFGColor,
|
|
¤tBKColor,
|
|
&isCurrentBKColorTransparent);
|
|
|
|
if (NS_SUCCEEDED(rv)) {
|
|
if (isSelection && !isPaginated)
|
|
{//DRAW RECT HERE!!!
|
|
if (!isCurrentBKColorTransparent) {
|
|
aRenderingContext.SetColor(currentBKColor);
|
|
aRenderingContext.FillRect(currentX, dy, newWidth, mRect.height);
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
newWidth =0;
|
|
}
|
|
|
|
aRenderingContext.PushState();
|
|
|
|
nsRect rect(currentX, dy, newWidth, mRect.height);
|
|
aRenderingContext.SetClipRect(rect, nsClipCombine_kIntersect);
|
|
|
|
if (isPaginated && !iter.IsBeforeOrAfter()) {
|
|
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
|
|
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy + mAscent);
|
|
} else if (!isPaginated) {
|
|
aRenderingContext.SetColor(nsCSSRendering::TransformColor(currentFGColor,canDarkenColor));
|
|
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy + mAscent);
|
|
}
|
|
|
|
aRenderingContext.PopState();
|
|
|
|
currentX+=newWidth;//increment twips X start
|
|
|
|
iter.Next();
|
|
}
|
|
}
|
|
else if (!isPaginated)
|
|
{
|
|
aRenderingContext.SetColor(nsCSSRendering::TransformColor(aTextStyle.mColor->mColor,canDarkenColor));
|
|
aRenderingContext.DrawString(text, PRUint32(textLength), dx, dy + mAscent);
|
|
}
|
|
}
|
|
|
|
PaintTextDecorations(aRenderingContext, aStyleContext, aPresContext,
|
|
aTextStyle, dx, dy, width, PR_FALSE,
|
|
unicodePaintBuffer.mBuffer,
|
|
details, 0, textLength);
|
|
sdptr = details;
|
|
if (details){
|
|
while ((sdptr = details->mNext) != nsnull) {
|
|
delete details;
|
|
details = sdptr;
|
|
}
|
|
delete details;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Cleanup
|
|
if (paintBuf != paintBufMem) {
|
|
delete [] paintBuf;
|
|
}
|
|
}
|
|
|
|
//---------------------------------------------------
|
|
// Also defined for external use in nsTextFrame.h
|
|
//
|
|
// Uses a binary search for find where the cursor falls in the line of text
|
|
// It also keeps track of the part of the string that has already been measured
|
|
// so it doesn't have to keep measuring the same text over and over
|
|
//
|
|
// Param "aBaseWidth" contains the width in twips of the portion
|
|
// of the text that has already been measured, and aBaseInx contains
|
|
// the index of the text that has already been measured.
|
|
//
|
|
// aTextWidth returns the (in twips) the length of the text that falls before the cursor
|
|
// aIndex contains the index of the text where the cursor falls
|
|
PRBool
|
|
BinarySearchForPosition(nsIRenderingContext* aRendContext,
|
|
const PRUnichar* aText,
|
|
PRInt32 aBaseWidth,
|
|
PRInt32 aBaseInx,
|
|
PRInt32 aStartInx,
|
|
PRInt32 aEndInx,
|
|
PRInt32 aCursorPos,
|
|
PRInt32& aIndex,
|
|
PRInt32& aTextWidth)
|
|
{
|
|
PRInt32 range = aEndInx - aStartInx;
|
|
if ((range == 1) || (range == 2 && IS_HIGH_SURROGATE(aText[aStartInx]))) {
|
|
aIndex = aStartInx + aBaseInx;
|
|
aRendContext->GetWidth(aText, aIndex, aTextWidth);
|
|
return PR_TRUE;
|
|
}
|
|
|
|
PRInt32 inx = aStartInx + (range / 2);
|
|
|
|
// Make sure we don't leave a dangling low surrogate
|
|
if (IS_HIGH_SURROGATE(aText[inx-1]))
|
|
inx++;
|
|
|
|
PRInt32 textWidth = 0;
|
|
aRendContext->GetWidth(aText, inx, textWidth);
|
|
|
|
PRInt32 fullWidth = aBaseWidth + textWidth;
|
|
if (fullWidth == aCursorPos) {
|
|
aTextWidth = textWidth;
|
|
aIndex = inx;
|
|
return PR_TRUE;
|
|
} else if (aCursorPos < fullWidth) {
|
|
aTextWidth = aBaseWidth;
|
|
if (BinarySearchForPosition(aRendContext, aText, aBaseWidth, aBaseInx, aStartInx, inx, aCursorPos, aIndex, aTextWidth)) {
|
|
return PR_TRUE;
|
|
}
|
|
} else {
|
|
aTextWidth = fullWidth;
|
|
if (BinarySearchForPosition(aRendContext, aText, aBaseWidth, aBaseInx, inx, aEndInx, aCursorPos, aIndex, aTextWidth)) {
|
|
return PR_TRUE;
|
|
}
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
//---------------------------------------------------------------------------
|
|
// Uses a binary search to find the position of the cursor in the text.
|
|
// The "indices array is used to map from the compressed text back to the
|
|
// un-compressed text, selection is based on the un-compressed text, the visual
|
|
// display of selection is based on the compressed text.
|
|
//---------------------------------------------------------------------------
|
|
NS_IMETHODIMP
|
|
nsTextFrame::GetPosition(nsPresContext* aPresContext,
|
|
const nsPoint& aPoint,
|
|
nsIContent ** aNewContent,
|
|
PRInt32& aContentOffset,
|
|
PRInt32& aContentOffsetEnd)
|
|
|
|
{
|
|
// pre-condition tests
|
|
NS_PRECONDITION(aPresContext && aNewContent, "null arg");
|
|
if (!aPresContext || !aNewContent) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
// initialize out param
|
|
*aNewContent = nsnull;
|
|
|
|
DEBUG_VERIFY_NOT_DIRTY(mState);
|
|
if (mState & NS_FRAME_IS_DIRTY)
|
|
return NS_ERROR_UNEXPECTED;
|
|
|
|
nsIPresShell *shell = aPresContext->GetPresShell();
|
|
if (shell) {
|
|
nsCOMPtr<nsIRenderingContext> rendContext;
|
|
nsresult rv = shell->CreateRenderingContext(this, getter_AddRefs(rendContext));
|
|
if (NS_SUCCEEDED(rv)) {
|
|
TextStyle ts(aPresContext, *rendContext, mStyleContext);
|
|
if (ts.mSmallCaps || ts.mWordSpacing || ts.mLetterSpacing || ts.mJustifying) {
|
|
nsresult result = GetPositionSlowly(aPresContext, rendContext, aPoint, aNewContent,
|
|
aContentOffset);
|
|
aContentOffsetEnd = aContentOffset;
|
|
return result;
|
|
}
|
|
|
|
// Make enough space to transform
|
|
nsAutoTextBuffer paintBuffer;
|
|
nsAutoIndexBuffer indexBuffer;
|
|
rv = indexBuffer.GrowTo(mContentLength + 1);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
// Find the font metrics for this text
|
|
SetFontFromStyle(rendContext, mStyleContext);
|
|
|
|
// Get the renderable form of the text
|
|
nsIDocument *doc = GetDocument(aPresContext);
|
|
nsTextTransformer tx(doc->GetLineBreaker(), nsnull, aPresContext);
|
|
PRInt32 textLength;
|
|
// no need to worry about justification, that's always on the slow path
|
|
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
|
|
|
|
nsPoint origin;
|
|
nsIView * view;
|
|
GetOffsetFromView(origin, &view);
|
|
|
|
//IF STYLE SAYS TO SELECT TO END OF FRAME HERE...
|
|
PRInt32 prefInt =
|
|
nsContentUtils::GetIntPref("browser.drag_out_of_frame_style");
|
|
PRBool outofstylehandled = PR_FALSE;
|
|
|
|
if (prefInt)
|
|
{
|
|
if ((aPoint.y - origin.y) < 0)//above rectangle
|
|
{
|
|
aContentOffset = mContentOffset;
|
|
aContentOffsetEnd = aContentOffset;
|
|
outofstylehandled = PR_TRUE;
|
|
}
|
|
else if ((aPoint.y - origin.y) > mRect.height)
|
|
{
|
|
aContentOffset = mContentOffset + mContentLength;
|
|
aContentOffsetEnd = aContentOffset;
|
|
outofstylehandled = PR_TRUE;
|
|
}
|
|
}
|
|
|
|
if (textLength <= 0) {
|
|
aContentOffset = mContentOffset;
|
|
aContentOffsetEnd = aContentOffset;
|
|
}
|
|
else if (!outofstylehandled) //then we need to track based on the X coord only
|
|
{
|
|
//END STYLE IF
|
|
PRInt32* ip = indexBuffer.mBuffer;
|
|
|
|
PRInt32 indx;
|
|
PRInt32 textWidth = 0;
|
|
PRUnichar* text = paintBuffer.mBuffer;
|
|
|
|
// See if the font backend will do all the hard work for us.
|
|
PRUint32 clusterHint = 0;
|
|
rendContext->GetHints(clusterHint);
|
|
clusterHint &= NS_RENDERING_HINT_TEXT_CLUSTERS;
|
|
if (clusterHint) {
|
|
nsPoint pt;
|
|
pt.x = aPoint.x - origin.x;
|
|
pt.y = aPoint.y - origin.y;
|
|
indx = rendContext->GetPosition(text, textLength, pt);
|
|
}
|
|
else {
|
|
#ifdef IBMBIDI
|
|
PRBool getReversedPos = NS_GET_EMBEDDING_LEVEL(this) & 1;
|
|
nscoord posX = (getReversedPos) ?
|
|
(mRect.width + origin.x) - (aPoint.x - origin.x) : aPoint.x;
|
|
|
|
PRBool found = BinarySearchForPosition(rendContext, text, origin.x, 0, 0,
|
|
PRInt32(textLength),
|
|
PRInt32(posX) , //go to local coordinates
|
|
indx, textWidth);
|
|
|
|
#else
|
|
PRBool found = BinarySearchForPosition(rendContext, text, origin.x, 0, 0,
|
|
PRInt32(textLength),
|
|
PRInt32(aPoint.x) , //go to local coordinates
|
|
indx, textWidth);
|
|
#endif // IBMBIDI
|
|
if (found) {
|
|
PRInt32 charWidth;
|
|
if (IS_HIGH_SURROGATE(text[indx]))
|
|
rendContext->GetWidth(&text[indx], 2, charWidth);
|
|
else
|
|
rendContext->GetWidth(text[indx], charWidth);
|
|
charWidth /= 2;
|
|
|
|
#ifdef IBMBIDI
|
|
if (getReversedPos) {
|
|
if (mRect.width - aPoint.x + origin.x > textWidth+charWidth ) {
|
|
indx++;
|
|
}
|
|
}
|
|
else
|
|
#endif // IBMBIDI
|
|
if ((aPoint.x - origin.x) > textWidth+charWidth) {
|
|
indx++;
|
|
}
|
|
}
|
|
}
|
|
|
|
aContentOffset = indx + mContentOffset;
|
|
//reusing wordBufMem
|
|
PRInt32 i;
|
|
for (i = 0; i < mContentLength; i ++){
|
|
if ((ip[i] >= aContentOffset) && //reverse mapping
|
|
(! IS_LOW_SURROGATE(paintBuffer.mBuffer[ip[i]-mContentOffset]))) {
|
|
break;
|
|
}
|
|
}
|
|
aContentOffset = i + mContentOffset;
|
|
#ifdef IBMBIDI
|
|
PRInt32 bidiStopOffset = mContentOffset + mContentLength;
|
|
|
|
if (aContentOffset >= mContentOffset && aContentOffset < bidiStopOffset) {
|
|
PRInt32 curindx = ip[aContentOffset - mContentOffset] - mContentOffset;
|
|
while (curindx < textLength && IS_BIDI_DIACRITIC(text[curindx])) {
|
|
if (++aContentOffset >= bidiStopOffset)
|
|
break;
|
|
curindx = ip[aContentOffset - mContentOffset] - mContentOffset;
|
|
}
|
|
}
|
|
#endif // IBMBIDI
|
|
aContentOffsetEnd = aContentOffset;
|
|
NS_ASSERTION(i<= mContentLength, "offset we got from binary search is messed up");
|
|
}
|
|
*aNewContent = mContent;
|
|
if (*aNewContent) {
|
|
(*aNewContent)->AddRef();
|
|
}
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::GetContentAndOffsetsFromPoint(nsPresContext* aPresContext,
|
|
const nsPoint& aPoint,
|
|
nsIContent ** aNewContent,
|
|
PRInt32& aContentOffset,
|
|
PRInt32& aContentOffsetEnd,
|
|
PRBool& aBeginFrameContent)
|
|
{
|
|
if (!aNewContent)
|
|
return NS_ERROR_NULL_POINTER;
|
|
*aNewContent = nsnull;//initialize
|
|
aContentOffset = 0;
|
|
aContentOffsetEnd = 0;
|
|
aBeginFrameContent = 0;
|
|
|
|
DEBUG_VERIFY_NOT_DIRTY(mState);
|
|
if (mState & NS_FRAME_IS_DIRTY)
|
|
return NS_ERROR_UNEXPECTED;
|
|
|
|
nsPoint newPoint;
|
|
newPoint.y = aPoint.y;
|
|
if (aPoint.x < 0)
|
|
newPoint.x = 0;
|
|
else
|
|
newPoint.x = aPoint.x;
|
|
nsresult rv = GetPosition(aPresContext, newPoint, aNewContent, aContentOffset, aContentOffsetEnd);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
if (aContentOffset == mContentOffset)
|
|
aBeginFrameContent = PR_TRUE;
|
|
else
|
|
aBeginFrameContent = PR_FALSE;
|
|
return rv;
|
|
}
|
|
|
|
|
|
// [HACK] Foward Declarations
|
|
void ForceDrawFrame(nsFrame * aFrame);
|
|
|
|
//null range means the whole thing
|
|
NS_IMETHODIMP
|
|
nsTextFrame::SetSelected(nsPresContext* aPresContext,
|
|
nsIDOMRange *aRange,
|
|
PRBool aSelected,
|
|
nsSpread aSpread)
|
|
{
|
|
if (aSelected && ParentDisablesSelection())
|
|
return NS_OK;
|
|
|
|
#if 0
|
|
PRBool isSelected = ((GetStateBits() & NS_FRAME_SELECTED_CONTENT) == NS_FRAME_SELECTED_CONTENT);
|
|
if (!aSelected && !isSelected) //already set thanks
|
|
{
|
|
return NS_OK;
|
|
}
|
|
#endif
|
|
|
|
// check whether style allows selection
|
|
PRBool selectable;
|
|
IsSelectable(&selectable, nsnull);
|
|
if (!selectable)
|
|
return NS_OK;//do not continue no selection for this frame.
|
|
|
|
PRBool found = PR_FALSE;
|
|
if (aRange) {
|
|
//lets see if the range contains us, if so we must redraw!
|
|
nsCOMPtr<nsIDOMNode> endNode;
|
|
PRInt32 endOffset;
|
|
nsCOMPtr<nsIDOMNode> startNode;
|
|
PRInt32 startOffset;
|
|
aRange->GetEndContainer(getter_AddRefs(endNode));
|
|
aRange->GetEndOffset(&endOffset);
|
|
aRange->GetStartContainer(getter_AddRefs(startNode));
|
|
aRange->GetStartOffset(&startOffset);
|
|
nsCOMPtr<nsIDOMNode> thisNode = do_QueryInterface(GetContent());
|
|
|
|
if (thisNode == startNode)
|
|
{
|
|
if ((mContentOffset + mContentLength) >= startOffset)
|
|
{
|
|
found = PR_TRUE;
|
|
if (thisNode == endNode)
|
|
{ //special case
|
|
if (endOffset == startOffset) //no need to redraw since drawing takes place with cursor
|
|
found = PR_FALSE;
|
|
|
|
if (mContentOffset > endOffset)
|
|
found = PR_FALSE;
|
|
}
|
|
}
|
|
}
|
|
else if (thisNode == endNode)
|
|
{
|
|
if (mContentOffset < endOffset)
|
|
found = PR_TRUE;
|
|
else
|
|
{
|
|
found = PR_FALSE;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
found = PR_TRUE;
|
|
}
|
|
}
|
|
else {
|
|
// null range means the whole thing
|
|
found = PR_TRUE;
|
|
}
|
|
|
|
if ( aSelected )
|
|
AddStateBits(NS_FRAME_SELECTED_CONTENT);
|
|
else
|
|
{//we need to see if any other selection available.
|
|
SelectionDetails *details = nsnull;
|
|
nsCOMPtr<nsIFrameSelection> frameSelection;
|
|
|
|
nsIPresShell *shell = aPresContext->GetPresShell();
|
|
if (shell) {
|
|
nsCOMPtr<nsISelectionController> selCon;
|
|
nsresult rv = GetSelectionController(aPresContext,
|
|
getter_AddRefs(selCon));
|
|
if (NS_SUCCEEDED(rv) && selCon)
|
|
{
|
|
frameSelection = do_QueryInterface(selCon); //this MAY implement
|
|
}
|
|
if (!frameSelection)
|
|
frameSelection = shell->FrameSelection();
|
|
|
|
nsCOMPtr<nsIContent> content;
|
|
PRInt32 offset;
|
|
PRInt32 length;
|
|
|
|
rv = GetContentAndOffsetsForSelection(aPresContext,
|
|
getter_AddRefs(content),
|
|
&offset, &length);
|
|
if (NS_SUCCEEDED(rv) && content) {
|
|
rv = frameSelection->LookUpSelection(content, offset,
|
|
length, &details, PR_TRUE);
|
|
// PR_TRUE last param used here! we need to see if we are still selected. so no shortcut
|
|
}
|
|
}
|
|
if (!details)
|
|
RemoveStateBits(NS_FRAME_SELECTED_CONTENT);
|
|
else
|
|
{
|
|
SelectionDetails *sdptr = details;
|
|
while ((sdptr = details->mNext) != nsnull) {
|
|
delete details;
|
|
details = sdptr;
|
|
}
|
|
delete details;
|
|
}
|
|
}
|
|
if (found){ //if range contains this frame...
|
|
// Selection might change our border, content and outline appearance
|
|
// But textframes can't have an outline. So just use the simple
|
|
// bounds
|
|
Invalidate(nsRect(0, 0, mRect.width, mRect.height), PR_FALSE);
|
|
}
|
|
if (aSpread == eSpreadDown)
|
|
{
|
|
nsIFrame* frame = GetPrevInFlow();
|
|
while(frame){
|
|
frame->SetSelected(aPresContext, aRange,aSelected,eSpreadNone);
|
|
frame = frame->GetPrevInFlow();
|
|
}
|
|
frame = GetNextInFlow();
|
|
while (frame){
|
|
frame->SetSelected(aPresContext, aRange,aSelected,eSpreadNone);
|
|
frame = frame->GetNextInFlow();
|
|
}
|
|
#ifdef IBMBIDI
|
|
if ((mState & NS_FRAME_IS_BIDI) &&
|
|
(frame = NS_STATIC_CAST(nsIFrame*,
|
|
aPresContext->PropertyTable()->GetProperty(this, nsLayoutAtoms::nextBidi)))) {
|
|
frame->SetSelected(aPresContext, aRange, aSelected, aSpread);
|
|
}
|
|
#endif // IBMBIDI
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::GetPointFromOffset(nsPresContext* aPresContext,
|
|
nsIRenderingContext* inRendContext,
|
|
PRInt32 inOffset,
|
|
nsPoint* outPoint)
|
|
{
|
|
if (!aPresContext || !inRendContext || !outPoint)
|
|
return NS_ERROR_NULL_POINTER;
|
|
|
|
outPoint->x = 0;
|
|
outPoint->y = 0;
|
|
|
|
DEBUG_VERIFY_NOT_DIRTY(mState);
|
|
if (mState & NS_FRAME_IS_DIRTY)
|
|
return NS_ERROR_UNEXPECTED;
|
|
|
|
if (mContentLength <= 0) {
|
|
return NS_OK;
|
|
}
|
|
|
|
inOffset-=mContentOffset;
|
|
if (inOffset < 0){
|
|
NS_ASSERTION(0,"offset less than this frame has in GetPointFromOffset");
|
|
inOffset = 0;
|
|
}
|
|
if (inOffset >= mContentLength)
|
|
inOffset = mContentLength;
|
|
TextStyle ts(aPresContext, *inRendContext, mStyleContext);
|
|
|
|
// Make enough space to transform
|
|
nsAutoTextBuffer paintBuffer;
|
|
nsAutoIndexBuffer indexBuffer;
|
|
nsresult rv = indexBuffer.GrowTo(mContentLength + 1);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
// Transform text from content into renderable form
|
|
nsIDocument *doc = GetDocument(aPresContext);
|
|
nsTextTransformer tx(doc->GetLineBreaker(), nsnull, aPresContext);
|
|
PRInt32 textLength;
|
|
PRIntn numJustifiableCharacter;
|
|
|
|
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength, PR_FALSE, &numJustifiableCharacter);
|
|
|
|
ComputeExtraJustificationSpacing(*inRendContext, ts, paintBuffer.mBuffer, textLength, numJustifiableCharacter);
|
|
|
|
|
|
PRInt32* ip = indexBuffer.mBuffer;
|
|
if (inOffset > mContentLength){
|
|
NS_ASSERTION(0, "invalid offset passed to GetPointFromOffset");
|
|
inOffset = mContentLength;
|
|
}
|
|
|
|
while (inOffset >=0 && ip[inOffset] < mContentOffset) //buffer has shrunk
|
|
inOffset --;
|
|
nscoord width = mRect.width;
|
|
if (inOffset <0)
|
|
{
|
|
NS_ASSERTION(0, "invalid offset passed to GetPointFromOffset");
|
|
inOffset=0;
|
|
width = 0;
|
|
}
|
|
else
|
|
{
|
|
PRInt32 hitLength = ip[inOffset] - mContentOffset;
|
|
if (ts.mSmallCaps || (0 != ts.mWordSpacing) || (0 != ts.mLetterSpacing) || ts.mJustifying)
|
|
{
|
|
nsTextDimensions dimensions;
|
|
GetTextDimensions(*inRendContext, ts, paintBuffer.mBuffer, hitLength,
|
|
textLength == hitLength, &dimensions);
|
|
width = dimensions.width;
|
|
}
|
|
else
|
|
{
|
|
PRInt32 totalLength = 0; // length up to the last-in-flow frame
|
|
nsCOMPtr<nsITextContent> tc(do_QueryInterface(mContent));
|
|
if (tc) {
|
|
totalLength = tc->Text()->GetLength(); // raw value which includes whitespace
|
|
}
|
|
if ((hitLength == textLength) && (inOffset = mContentLength) &&
|
|
(mContentOffset + mContentLength == totalLength)) {
|
|
// no need to re-measure when at the end of the last-in-flow
|
|
}
|
|
else
|
|
inRendContext->GetWidth(paintBuffer.mBuffer, hitLength, width);
|
|
}
|
|
if ((hitLength == textLength) && (TEXT_TRIMMED_WS & mState)) {
|
|
//
|
|
// Offset must be after a space that has
|
|
// been trimmed off the end of the frame.
|
|
// Add the width of the trimmed space back
|
|
// to the total width, so the caret appears
|
|
// in the proper place!
|
|
//
|
|
// NOTE: the trailing whitespace includes the word and letter spacing!!
|
|
width += ts.mSpaceWidth + ts.mWordSpacing + ts.mLetterSpacing;
|
|
}
|
|
}
|
|
#ifdef IBMBIDI
|
|
if (NS_GET_EMBEDDING_LEVEL(this) & 1) {
|
|
if (width > mRect.width)
|
|
outPoint->x = 0;
|
|
else
|
|
outPoint->x = mRect.width - width;
|
|
}
|
|
else
|
|
#endif // IBMBIDI
|
|
//XXX callers need to safeguard themselves against empty frames, I noted that
|
|
//the caret can be locked when leftarrow'ing in: <span>...</span>\n<br>line
|
|
if (width > mRect.width)
|
|
outPoint->x = mRect.width;
|
|
else
|
|
outPoint->x = width;
|
|
outPoint->y = 0;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::GetChildFrameContainingOffset(PRInt32 inContentOffset,
|
|
PRBool inHint,
|
|
PRInt32* outFrameContentOffset,
|
|
nsIFrame **outChildFrame)
|
|
{
|
|
if (nsnull == outChildFrame)
|
|
return NS_ERROR_NULL_POINTER;
|
|
PRInt32 contentOffset = inContentOffset;
|
|
|
|
if (contentOffset != -1) //-1 signified the end of the current content
|
|
contentOffset = inContentOffset - mContentOffset;
|
|
|
|
if ((contentOffset > mContentLength) || ((contentOffset == mContentLength) && inHint) )
|
|
{
|
|
//this is not the frame we are looking for.
|
|
nsIFrame* nextInFlow = GetNextInFlow();
|
|
if (nextInFlow)
|
|
{
|
|
return nextInFlow->GetChildFrameContainingOffset(inContentOffset, inHint, outFrameContentOffset, outChildFrame);
|
|
}
|
|
else {
|
|
#ifdef IBMBIDI // Simon
|
|
// There is no nextInFlow - check if there is a bidi
|
|
// continuation frame
|
|
if (mState & NS_FRAME_IS_BIDI)
|
|
{
|
|
nsIFrame *nextBidi = GetNextSibling();
|
|
if (nextBidi)
|
|
{
|
|
PRInt32 start, end;
|
|
if (NS_SUCCEEDED(nextBidi->GetOffsets(start, end)) && start > 0)
|
|
{
|
|
return nextBidi->GetChildFrameContainingOffset(inContentOffset,
|
|
inHint, outFrameContentOffset, outChildFrame);
|
|
}
|
|
}
|
|
}
|
|
#endif // IBMBIDI
|
|
{
|
|
if (contentOffset != mContentLength) //that condition was only for when there is a choice
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (inContentOffset < mContentOffset) //could happen with floats!
|
|
{
|
|
*outChildFrame = GetPrevInFlow();
|
|
if (*outChildFrame)
|
|
return (*outChildFrame)->GetChildFrameContainingOffset(inContentOffset, inHint,
|
|
outFrameContentOffset,outChildFrame);
|
|
else
|
|
return NS_OK; //this can't be the right thing to do?
|
|
}
|
|
|
|
*outFrameContentOffset = contentOffset;
|
|
*outChildFrame = this;
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::PeekOffset(nsPresContext* aPresContext, nsPeekOffsetStruct *aPos)
|
|
{
|
|
DEBUG_VERIFY_NOT_DIRTY(mState);
|
|
if (mState & NS_FRAME_IS_DIRTY)
|
|
return NS_ERROR_UNEXPECTED;
|
|
|
|
#ifdef IBMBIDI
|
|
// XXX TODO: - this explanation may not be accurate
|
|
// - need to better explain what aPos->mPreferLeft means
|
|
// for two frames on the same line
|
|
// - need to better explain for what happens when you move
|
|
// from the end of a line to the beginning of the next
|
|
// despite not making a move logically within the text.
|
|
// - need to explain why XORing with the embedding level
|
|
// achieves the desired effect
|
|
//
|
|
// When you move your caret by in some visual direction, and you find the
|
|
// new position is at the edge of a line (beginning or end), you usually
|
|
// want to stay on the current line rather than move to the next or the
|
|
// previous one; however, if you want to get to the edge of the next or
|
|
// the previous word (i.e. you're 'eating white space' when moving
|
|
// between words), and you couldn't find the word in the current line,
|
|
// you do _not_ want to stay on the current line - you want to get to that
|
|
// word.
|
|
//
|
|
// When your frames are ordered the same way logically as they are
|
|
// visually (e.g. when they're frames of LTR text displayed in
|
|
// left-then-down order), this translates to terms of 'prefer left' or
|
|
// 'prefer right', i.e. if you move to the left and hit the beginning of
|
|
// the line you have to choose between the frame "on the left" - the last
|
|
// frame on the previous line - and the frame "on the right" - the
|
|
// first frame of the current line.
|
|
//
|
|
// When the frames are displayed in right-then-down order (i.e. frames
|
|
// within an RTL line), the last sentence remains correct, but now
|
|
// the directions are reversed - if you're moving left, you hit the end
|
|
// of a line; the frame closer to your original position is the one
|
|
// "on the right" - the last frame on the current line - rather than the
|
|
// one "on the left" - the first frame on the next
|
|
// line.
|
|
//
|
|
// Now, it seems the PeekOffset() method does not _use_ the mPreferLeft
|
|
// value, but it does _set_ it for the caller, and this must be done
|
|
// consistently along calls to PeekOffset of nsTextFrames on the _same_
|
|
// line as well as on different lines.
|
|
//
|
|
// Note:
|
|
// eDirPrevious actually means 'in the visual left-then-down direction'
|
|
// eDirNext actually means 'in the visual right-then-down direction'
|
|
// (this is again due to the LTRish bias of the nomenclature)
|
|
|
|
PRBool isOddLevel = NS_GET_EMBEDDING_LEVEL(this) & 1;
|
|
|
|
if ((eSelectCharacter == aPos->mAmount)
|
|
|| (eSelectWord == aPos->mAmount))
|
|
// this 'flip' will be in effect only for this frame, not
|
|
// for recursive calls to PeekOffset()
|
|
aPos->mPreferLeft ^= isOddLevel;
|
|
#endif
|
|
|
|
if (!aPos || !mContent)
|
|
return NS_ERROR_NULL_POINTER;
|
|
|
|
// XXX TODO: explain this policy; why the assymetry between
|
|
// too high and too low start offsets?
|
|
//
|
|
// There are 4 possible ranges of aPos->mStartOffset:
|
|
//
|
|
// 0 mContentOffset mContentOffset+mContentLength
|
|
// | | |
|
|
// range #1 | range #2 | range #3 | range #4
|
|
// ***************
|
|
// our frame's part
|
|
// of the content
|
|
//
|
|
// Range Policy
|
|
// ------------------------------------------------------------------------
|
|
// #1 Assume the start position is at the end of the content of 'this'
|
|
// #2 Round up the position to the beginning of our frame
|
|
// #3 No change necessary
|
|
// #4 Delegate the PeekOffset() to the next frame (according
|
|
// to the direction, either to our left or our right)
|
|
//
|
|
// Note: the diagram above is drawn left-to-right, but advancing
|
|
// in the content may sometimes mean going right-to-left
|
|
|
|
if (aPos->mStartOffset < 0 )
|
|
aPos->mStartOffset = mContentLength + mContentOffset;
|
|
if (aPos->mStartOffset < mContentOffset){
|
|
aPos->mStartOffset = mContentOffset;
|
|
}
|
|
if (aPos->mStartOffset > (mContentOffset + mContentLength)){
|
|
nsIFrame *nextInFlow;
|
|
#ifdef IBMBIDI
|
|
if (isOddLevel) {
|
|
nextInFlow = NS_STATIC_CAST(nsIFrame*,
|
|
aPresContext->PropertyTable()->GetProperty(this,
|
|
nsLayoutAtoms::nextBidi));
|
|
}
|
|
else
|
|
#endif
|
|
nextInFlow = GetNextInFlow();
|
|
if (!nextInFlow){
|
|
NS_ASSERTION(PR_FALSE,"nsTextFrame::PeekOffset no more flow \n");
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
// undoing the RTL flipping of mPreferLeft for the delegation
|
|
// to the next frame
|
|
if ((eSelectCharacter == aPos->mAmount)
|
|
|| (eSelectWord == aPos->mAmount))
|
|
aPos->mPreferLeft ^= isOddLevel;
|
|
return nextInFlow->PeekOffset(aPresContext, aPos);
|
|
}
|
|
|
|
// XXX TODO: explain the following:
|
|
// - if this frame is the first of the last in the line according
|
|
// to the content indices, why not handle the cases of
|
|
// eSelectBeginLine/eSelectEndLine
|
|
// - why can't we make the hand-off to the parent class' method
|
|
// before the of aPos->mStartOffset and aPos->mPreferLeft?
|
|
|
|
if (aPos->mAmount == eSelectLine || aPos->mAmount == eSelectBeginLine
|
|
|| aPos->mAmount == eSelectEndLine || aPos->mAmount == eSelectParagraph)
|
|
{
|
|
return nsFrame::PeekOffset(aPresContext, aPos);
|
|
}
|
|
|
|
nsAutoTextBuffer paintBuffer;
|
|
nsAutoIndexBuffer indexBuffer;
|
|
nsresult rv = indexBuffer.GrowTo(mContentLength + 1);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
PRInt32* ip = indexBuffer.mBuffer;
|
|
|
|
PRInt32 textLength;
|
|
nsresult result(NS_ERROR_FAILURE);
|
|
aPos->mResultContent = mContent;//do this right off
|
|
switch (aPos->mAmount){
|
|
case eSelectNoAmount:
|
|
{
|
|
// Transform text from content into renderable form
|
|
nsIDocument* doc = mContent->GetDocument();
|
|
if (!doc) {
|
|
return NS_OK;
|
|
}
|
|
nsTextTransformer tx(doc->GetLineBreaker(), nsnull, aPresContext);
|
|
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
|
|
|
|
if (textLength)//if no renderable length, you cant park here.
|
|
{
|
|
aPos->mContentOffset = aPos->mStartOffset;
|
|
result = NS_OK;
|
|
}
|
|
else
|
|
{
|
|
aPos->mAmount = eSelectDir;//go to "next" or previous frame based on direction not THIS frame
|
|
result = GetFrameFromDirection(aPresContext, aPos);
|
|
if (NS_SUCCEEDED(result) && aPos->mResultFrame && aPos->mResultFrame!= this)
|
|
return aPos->mResultFrame->PeekOffset(aPresContext, aPos);
|
|
else if (NS_FAILED(result))
|
|
return result;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case eSelectCharacter:
|
|
{
|
|
// Transform text from content into renderable form
|
|
nsIDocument* doc = mContent->GetDocument();
|
|
if (!doc) {
|
|
return NS_OK;
|
|
}
|
|
nsTextTransformer tx(doc->GetLineBreaker(), nsnull, aPresContext);
|
|
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
|
|
|
|
nsIFrame *frameUsed = nsnull;
|
|
PRInt32 start;
|
|
PRBool found = PR_TRUE;
|
|
|
|
PRBool selectable;
|
|
PRUint8 selectStyle;
|
|
|
|
IsSelectable(&selectable, &selectStyle);
|
|
if ( selectStyle == NS_STYLE_USER_SELECT_ALL )
|
|
found = PR_FALSE;
|
|
else
|
|
{
|
|
|
|
#ifdef IBMBIDI // Simon - RTL frames reverse meaning of previous and next
|
|
// so that right arrow always moves to the right on screen
|
|
// and left arrow always moves left
|
|
if ( ((aPos->mDirection == eDirPrevious) && !isOddLevel) ||
|
|
((aPos->mDirection == eDirNext) && isOddLevel) ){
|
|
#else
|
|
if (aPos->mDirection == eDirPrevious){
|
|
#endif
|
|
aPos->mContentOffset = 0;
|
|
PRInt32 i;
|
|
|
|
nsAutoPRUint8Buffer clusterBuffer;
|
|
rv = FillClusterBuffer(aPresContext, paintBuffer.mBuffer,
|
|
(PRUint32)textLength, clusterBuffer);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
for (i = aPos->mStartOffset -1 - mContentOffset; i >=0; i--){
|
|
if ((ip[i] < ip[aPos->mStartOffset - mContentOffset]) &&
|
|
(clusterBuffer.mBuffer[ip[i] - mContentOffset]) &&
|
|
(! IS_LOW_SURROGATE(paintBuffer.mBuffer[ip[i]-mContentOffset])))
|
|
{
|
|
aPos->mContentOffset = i + mContentOffset;
|
|
break;
|
|
}
|
|
}
|
|
|
|
#ifdef SUNCTL
|
|
static NS_DEFINE_CID(kLECID, NS_ULE_CID);
|
|
|
|
nsCOMPtr<nsILE> ctlObj;
|
|
ctlObj = do_CreateInstance(kLECID, &rv);
|
|
if (NS_FAILED(rv)) {
|
|
NS_WARNING("Cell based cursor movement will not be supported\n");
|
|
ctlObj = nsnull;
|
|
}
|
|
else {
|
|
PRBool needsCTL = PR_FALSE;
|
|
PRInt32 previousOffset;
|
|
|
|
ctlObj->NeedsCTLFix(NS_REINTERPRET_CAST(const PRUnichar*,
|
|
paintBuffer.mBuffer),
|
|
aPos->mStartOffset, -1, &needsCTL);
|
|
|
|
if (needsCTL) {
|
|
ctlObj->PrevCluster(NS_REINTERPRET_CAST(const PRUnichar*,
|
|
paintBuffer.mBuffer),
|
|
textLength,aPos->mStartOffset,
|
|
&previousOffset);
|
|
aPos->mContentOffset = i = previousOffset;
|
|
}
|
|
}
|
|
#endif /* SUNCTL */
|
|
|
|
if (i <0){
|
|
found = PR_FALSE;
|
|
frameUsed = GetPrevInFlow();
|
|
start = mContentOffset;
|
|
aPos->mContentOffset = start;//in case next call fails we stop at this offset
|
|
}
|
|
}
|
|
#ifdef IBMBIDI // Simon, as above
|
|
else if ( ((aPos->mDirection == eDirNext) && !isOddLevel) ||
|
|
((aPos->mDirection == eDirPrevious) && isOddLevel) ){
|
|
#else
|
|
else if (aPos->mDirection == eDirNext){
|
|
#endif
|
|
PRInt32 i;
|
|
aPos->mContentOffset = mContentLength;
|
|
|
|
nsAutoPRUint8Buffer clusterBuffer;
|
|
rv = FillClusterBuffer(aPresContext, paintBuffer.mBuffer,
|
|
(PRUint32)textLength, clusterBuffer);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
for (i = aPos->mStartOffset - mContentOffset; i <= mContentLength; i++) {
|
|
if ((ip[i] > ip[aPos->mStartOffset - mContentOffset]) &&
|
|
((i == mContentLength) ||
|
|
(!IS_LOW_SURROGATE(paintBuffer.mBuffer[ip[i] - mContentOffset])) &&
|
|
(clusterBuffer.mBuffer[ip[i] - mContentOffset]))) {
|
|
aPos->mContentOffset = i + mContentOffset;
|
|
break;
|
|
}
|
|
}
|
|
|
|
#ifdef SUNCTL
|
|
static NS_DEFINE_CID(kLECID, NS_ULE_CID);
|
|
|
|
nsCOMPtr<nsILE> ctlObj;
|
|
ctlObj = do_CreateInstance(kLECID, &rv);
|
|
if (NS_FAILED(rv)) {
|
|
NS_WARNING("Cell based cursor movement will not be supported\n");
|
|
ctlObj = nsnull;
|
|
}
|
|
else {
|
|
PRBool needsCTL = PR_FALSE;
|
|
PRInt32 nextOffset;
|
|
|
|
ctlObj->NeedsCTLFix(NS_REINTERPRET_CAST(const PRUnichar*,
|
|
paintBuffer.mBuffer),
|
|
aPos->mStartOffset, 0, &needsCTL);
|
|
|
|
if (needsCTL) {
|
|
|
|
ctlObj->NextCluster(NS_REINTERPRET_CAST(const PRUnichar*,
|
|
paintBuffer.mBuffer),
|
|
textLength, aPos->mStartOffset,
|
|
&nextOffset);
|
|
aPos->mContentOffset = i = nextOffset;
|
|
}
|
|
}
|
|
#endif /* SUNCTL */
|
|
|
|
/* if (aStartOffset == 0 && (mState & TEXT_SKIP_LEADING_WS))
|
|
i--; //back up because we just skipped over some white space. why skip over the char also?
|
|
*/
|
|
if (i > mContentLength){
|
|
found = PR_FALSE;
|
|
// XXX TODO: explain why in this case GetNextInFlow() is good enough,
|
|
// but in the case of
|
|
// aPos->mStartOffset > (mContentOffset + mContentLength)
|
|
// above, we use the presentation context and get the 'nextBidi'
|
|
frameUsed = GetNextInFlow();
|
|
start = mContentOffset + mContentLength;
|
|
aPos->mContentOffset = start;//in case next call fails we stop at this offset
|
|
}
|
|
}
|
|
}
|
|
if (!found)
|
|
{
|
|
result = GetFrameFromDirection(aPresContext, aPos);
|
|
if (NS_SUCCEEDED(result) && aPos->mResultFrame && aPos->mResultFrame!= this)
|
|
{
|
|
// undoing the RTL flipping of mPreferLeft in the case where
|
|
// the inner call will do it itself;
|
|
// note that mAmount, as well as mPreferLeft might have been modified
|
|
// by the call to GetFrameFromDirection (if we are moving to another line)
|
|
if (eSelectCharacter == aPos->mAmount)
|
|
aPos->mPreferLeft ^= isOddLevel;
|
|
result = aPos->mResultFrame->PeekOffset(aPresContext, aPos);
|
|
if (NS_FAILED(result))
|
|
return result;
|
|
}
|
|
}
|
|
else
|
|
aPos->mResultContent = mContent;
|
|
}
|
|
break;
|
|
|
|
case eSelectWord:
|
|
{
|
|
// Transform text from content into renderable form
|
|
nsIDocument* doc = mContent->GetDocument();
|
|
if (!doc) {
|
|
return result;
|
|
}
|
|
|
|
nsTextTransformer tx(doc->GetLineBreaker(),
|
|
doc->GetWordBreaker(), aPresContext);
|
|
|
|
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
|
|
nsIFrame *frameUsed = nsnull;
|
|
PRBool keepSearching; //if you run out of chars before you hit the end of word, maybe next frame has more text to select?
|
|
PRInt32 start;
|
|
PRBool found = PR_FALSE;
|
|
PRBool isWhitespace, wasTransformed;
|
|
PRInt32 wordLen, contentLen;
|
|
PRBool wordSelectEatSpaceAfter = tx.GetWordSelectEatSpaceAfter();
|
|
|
|
PRBool selectable;
|
|
PRUint8 selectStyle;
|
|
IsSelectable(&selectable, &selectStyle);
|
|
if ( selectStyle == NS_STYLE_USER_SELECT_ALL )
|
|
found = PR_FALSE;
|
|
else
|
|
{
|
|
|
|
#ifdef IBMBIDI // Simon - RTL frames reverse meaning of previous and next
|
|
// so that right arrow always moves to the right on screen
|
|
// and left arrow always moves left
|
|
if ( ((aPos->mDirection == eDirPrevious) && !isOddLevel) ||
|
|
((aPos->mDirection == eDirNext) && isOddLevel) ) {
|
|
#else
|
|
if (aPos->mDirection == eDirPrevious){
|
|
#endif
|
|
keepSearching = PR_TRUE;
|
|
tx.Init(this, mContent, aPos->mStartOffset);
|
|
aPos->mContentOffset = mContentOffset;//initialize
|
|
#ifdef IBMBIDI
|
|
wordLen = (mState & NS_FRAME_IS_BIDI) ? mContentOffset : -1;
|
|
#endif // IBMBIDI
|
|
if (tx.GetPrevWord(PR_FALSE, &wordLen, &contentLen, &isWhitespace,
|
|
PR_FALSE, aPos->mIsKeyboardSelect) &&
|
|
(aPos->mStartOffset - contentLen >= mContentOffset) ){
|
|
if ((aPos->mEatingWS && !isWhitespace) || !aPos->mEatingWS){
|
|
aPos->mContentOffset = aPos->mStartOffset - contentLen;
|
|
//check for whitespace next.
|
|
if (isWhitespace && aPos->mContentOffset <= mContentOffset)
|
|
{
|
|
keepSearching = PR_FALSE;//reached the beginning of a word
|
|
aPos->mEatingWS = PR_FALSE;//if no real word then
|
|
}
|
|
else{
|
|
#ifdef IBMBIDI
|
|
wordLen = (mState & NS_FRAME_IS_BIDI) ? mContentOffset : -1;
|
|
#endif // IBMBIDI
|
|
while (isWhitespace &&
|
|
tx.GetPrevWord(PR_FALSE, &wordLen, &contentLen,
|
|
&isWhitespace, PR_FALSE,
|
|
aPos->mIsKeyboardSelect)){
|
|
aPos->mContentOffset -= contentLen;
|
|
aPos->mEatingWS = PR_TRUE;
|
|
#ifdef IBMBIDI
|
|
wordLen = (mState & NS_FRAME_IS_BIDI) ? mContentOffset : -1;
|
|
#endif // IBMBIDI
|
|
}
|
|
aPos->mEatingWS = !isWhitespace;//nowhite space, just eat chars.
|
|
keepSearching = aPos->mContentOffset <= mContentOffset;
|
|
if (!isWhitespace){
|
|
if (!keepSearching)
|
|
found = PR_TRUE;
|
|
else
|
|
aPos->mEatingWS = PR_TRUE;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
aPos->mContentOffset = mContentLength + mContentOffset;
|
|
found = PR_TRUE;
|
|
}
|
|
}
|
|
}
|
|
#ifdef IBMBIDI // Simon, as above
|
|
else if ( ((aPos->mDirection == eDirNext) && !isOddLevel) ||
|
|
((aPos->mDirection == eDirPrevious) && isOddLevel) ) {
|
|
#else
|
|
else if (aPos->mDirection == eDirNext) {
|
|
#endif
|
|
tx.Init(this, mContent, aPos->mStartOffset );
|
|
aPos->mContentOffset = mContentOffset + mContentLength;//initialize
|
|
|
|
#ifdef IBMBIDI
|
|
wordLen = (mState & NS_FRAME_IS_BIDI) ? mContentOffset + mContentLength : -1;
|
|
#endif // IBMBIDI
|
|
if (tx.GetNextWord(PR_FALSE, &wordLen, &contentLen, &isWhitespace, &wasTransformed, PR_TRUE, PR_FALSE, aPos->mIsKeyboardSelect) &&
|
|
(aPos->mStartOffset + contentLen <= (mContentLength + mContentOffset))){
|
|
|
|
// On some platforms (mac, unix), we want the selection to end
|
|
// at the end of the word (not the beginning of the next one).
|
|
if ((wordSelectEatSpaceAfter ? isWhitespace : !isWhitespace) || !aPos->mEatingWS) {
|
|
aPos->mContentOffset = aPos->mStartOffset + contentLen;
|
|
keepSearching = PR_TRUE;
|
|
if (wordSelectEatSpaceAfter ? isWhitespace : !isWhitespace)
|
|
aPos->mEatingWS = PR_TRUE;
|
|
#ifdef IBMBIDI
|
|
wordLen = (mState & NS_FRAME_IS_BIDI)
|
|
? mContentOffset + mContentLength : -1;
|
|
#endif // IBMBIDI
|
|
while (tx.GetNextWord(PR_FALSE, &wordLen, &contentLen, &isWhitespace, &wasTransformed, PR_TRUE, PR_FALSE, aPos->mIsKeyboardSelect))
|
|
{
|
|
if (wordSelectEatSpaceAfter ? !isWhitespace : aPos->mEatingWS)
|
|
break;
|
|
if (aPos->mStartOffset + contentLen >= (mContentLength + mContentOffset))
|
|
goto TryNextFrame;
|
|
if (wordSelectEatSpaceAfter ? isWhitespace : !isWhitespace)
|
|
aPos->mEatingWS = PR_TRUE;
|
|
aPos->mContentOffset += contentLen;
|
|
#ifdef IBMBIDI
|
|
wordLen = (mState & NS_FRAME_IS_BIDI)
|
|
? mContentOffset + mContentLength : -1;
|
|
#endif // IBMBIDI
|
|
}
|
|
keepSearching = (mContentOffset + mContentLength) <= aPos->mContentOffset;
|
|
if (!keepSearching)
|
|
found = PR_TRUE;
|
|
}
|
|
else
|
|
{
|
|
aPos->mContentOffset = mContentOffset;
|
|
found = PR_TRUE;
|
|
}
|
|
}
|
|
|
|
TryNextFrame:
|
|
// XXX TODO: explain why in this case GetNextInFlow() is good enough,
|
|
// but in the case of
|
|
// aPos->mStartOffset > (mContentOffset + mContentLength)
|
|
// above, we use the presentation context and get the 'nextBidi'
|
|
frameUsed = GetNextInFlow();
|
|
start = 0;
|
|
}
|
|
}
|
|
if (!found ||
|
|
(aPos->mContentOffset > (mContentOffset + mContentLength)) ||
|
|
(aPos->mContentOffset < mContentOffset))
|
|
{
|
|
aPos->mContentOffset = PR_MIN(aPos->mContentOffset, mContentOffset + mContentLength);
|
|
aPos->mContentOffset = PR_MAX(aPos->mContentOffset, mContentOffset);
|
|
if (wordSelectEatSpaceAfter && aPos->mDirection == eDirNext && aPos->mEatingWS) {
|
|
//If we want to stop at beginning of the next word
|
|
//GetFrameFromDirction should not return NS_ERROR_FAILURE at end of line
|
|
aPos->mEatingWS = PR_FALSE;
|
|
result = GetFrameFromDirection(aPresContext, aPos);
|
|
aPos->mEatingWS = PR_TRUE;
|
|
}
|
|
else
|
|
result = GetFrameFromDirection(aPresContext, aPos);
|
|
if (NS_SUCCEEDED(result) && aPos->mResultFrame && aPos->mResultFrame!= this)
|
|
{
|
|
// undoing the RTL flipping of mPreferLeft in the case where
|
|
// the inner call will do it itself;
|
|
// note that mAmount, as well as mPreferLeft might have been modified
|
|
// by the call to GetFrameFromDirection (if we are moving to another line)
|
|
if (eSelectWord == aPos->mAmount)
|
|
aPos->mPreferLeft ^= isOddLevel;
|
|
if (NS_SUCCEEDED(result = aPos->mResultFrame->PeekOffset(aPresContext, aPos)))
|
|
return NS_OK;//else fall through
|
|
else if (aPos->mDirection == eDirNext)
|
|
aPos->mContentOffset = mContentOffset + mContentLength;
|
|
else
|
|
aPos->mContentOffset = mContentOffset;
|
|
}
|
|
else
|
|
aPos->mResultContent = mContent;
|
|
}
|
|
else
|
|
{
|
|
aPos->mResultContent = mContent;
|
|
}
|
|
}
|
|
break;
|
|
|
|
#ifdef IBMBIDI
|
|
case eSelectDir:
|
|
result = GetFrameFromDirection(aPresContext, aPos);
|
|
if (NS_SUCCEEDED(result) && aPos->mResultFrame && aPos->mResultFrame!= this)
|
|
return aPos->mResultFrame->PeekOffset(aPresContext, aPos);
|
|
else {
|
|
return result;
|
|
}
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
result = NS_ERROR_FAILURE; break;
|
|
}
|
|
|
|
aPos->mContentOffsetEnd = aPos->mContentOffset;
|
|
|
|
if (NS_FAILED(result)){
|
|
aPos->mResultContent = mContent;
|
|
//aPos->mContentOffset = aPos->mStartOffset;
|
|
result = NS_OK;
|
|
}
|
|
aPos->mResultFrame = this;
|
|
|
|
return result;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::HandleMultiplePress(nsPresContext* aPresContext,
|
|
nsGUIEvent* aEvent,
|
|
nsEventStatus* aEventStatus)
|
|
{
|
|
if (DisplaySelection(aPresContext) == nsISelectionController::SELECTION_OFF) {
|
|
return NS_OK;
|
|
}
|
|
|
|
nsMouseEvent *me = (nsMouseEvent *)aEvent;
|
|
if (!me) return NS_OK;
|
|
|
|
// Triple- and greater click counts are handled by nsFrame.
|
|
if (me->clickCount > 2)
|
|
return nsFrame::HandleMultiplePress(aPresContext, aEvent, aEventStatus);
|
|
|
|
// Double-click: word selection, handled here:
|
|
PRInt32 startPos = 0;
|
|
PRInt32 contentOffsetEnd = 0;
|
|
nsCOMPtr<nsIContent> newContent;
|
|
nsresult rv = GetPosition(aPresContext, aEvent->point,
|
|
getter_AddRefs(newContent), startPos,
|
|
contentOffsetEnd);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
|
|
return PeekBackwardAndForward(eSelectWord, eSelectWord, startPos,
|
|
aPresContext, PR_FALSE);
|
|
}
|
|
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::CheckVisibility(nsPresContext* aContext, PRInt32 aStartIndex, PRInt32 aEndIndex, PRBool aRecurse, PRBool *aFinished, PRBool *_retval)
|
|
{
|
|
if (!aFinished || !_retval)
|
|
return NS_ERROR_NULL_POINTER;
|
|
if (*aFinished)
|
|
return NS_ERROR_FAILURE; //dont call with finished != false
|
|
if (mContentOffset > aEndIndex)
|
|
return NS_OK; //reached the end
|
|
if (mContentOffset > aStartIndex)
|
|
aStartIndex = mContentOffset;
|
|
if (aStartIndex >= aEndIndex) //how can it be greater?? check anyway
|
|
return NS_OK; //reached the end.
|
|
|
|
nsresult rv ;
|
|
if (aStartIndex < (mContentOffset + mContentLength))
|
|
{
|
|
//get the presshell
|
|
nsIPresShell *shell = aContext->GetPresShell();
|
|
if (!shell)
|
|
return NS_ERROR_FAILURE;
|
|
|
|
//get the document
|
|
nsIDocument *doc = shell->GetDocument();
|
|
if (!doc)
|
|
return NS_ERROR_FAILURE;
|
|
//create texttransformer
|
|
nsTextTransformer tx(doc->GetLineBreaker(), nsnull, aContext);
|
|
//create the buffers
|
|
nsAutoTextBuffer paintBuffer;
|
|
nsAutoIndexBuffer indexBuffer;
|
|
if (NS_FAILED(indexBuffer.GrowTo(mContentLength + 1)))
|
|
return NS_ERROR_FAILURE;//bail out
|
|
|
|
PRInt32 textLength;
|
|
PrepareUnicodeText(tx, &indexBuffer, &paintBuffer, &textLength);
|
|
if (textLength)//we have something to measure?
|
|
{
|
|
PRInt32 start = PR_MAX(aStartIndex,mContentOffset);
|
|
PRInt32 end = PR_MIN(mContentOffset + mContentLength-1, aEndIndex); //base 0 index of array
|
|
while (start != end)
|
|
{
|
|
if (indexBuffer.mBuffer[start] < indexBuffer.mBuffer[start+1]) //we have a rendered char!
|
|
{
|
|
*aFinished = PR_TRUE;//we are done bubble out.
|
|
*_retval = PR_TRUE;//hit a drawn char
|
|
return NS_OK;
|
|
}
|
|
start++;
|
|
}
|
|
if (start == aEndIndex)
|
|
{
|
|
*aFinished = PR_TRUE;
|
|
}
|
|
}
|
|
}
|
|
if (aRecurse) //recurse through the siblings.
|
|
{
|
|
nsIFrame *nextInFlow = this;
|
|
rv = NS_OK;
|
|
while (!aFinished && nextInFlow && NS_SUCCEEDED(rv) && !*_retval) //while we havent found anything visible
|
|
{
|
|
nextInFlow = nextInFlow->GetNextInFlow();
|
|
if (nextInFlow)
|
|
{
|
|
rv = nextInFlow->CheckVisibility(aContext,aStartIndex,aEndIndex,PR_FALSE,aFinished,_retval);
|
|
}
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::GetOffsets(PRInt32 &start, PRInt32 &end) const
|
|
{
|
|
start = mContentOffset;
|
|
end = mContentOffset+mContentLength;
|
|
return NS_OK;
|
|
}
|
|
|
|
#define TEXT_MAX_NUM_SEGMENTS 65
|
|
|
|
struct SegmentData {
|
|
PRUint32 mIsWhitespace : 1;
|
|
PRUint32 mContentLen : 31; // content length
|
|
|
|
PRBool IsWhitespace() {return PRBool(mIsWhitespace);}
|
|
|
|
// Get the content length. This is a running total of all
|
|
// the previous segments as well
|
|
PRInt32 ContentLen() {return PRInt32(mContentLen);}
|
|
};
|
|
|
|
struct TextRun {
|
|
// Total number of characters and the accumulated content length
|
|
PRInt32 mTotalNumChars, mTotalContentLen;
|
|
|
|
// Words and whitespace each count as a segment
|
|
PRInt32 mNumSegments;
|
|
|
|
// Possible break points specified as offsets into the buffer
|
|
PRInt32 mBreaks[TEXT_MAX_NUM_SEGMENTS];
|
|
|
|
// Per segment data
|
|
SegmentData mSegments[TEXT_MAX_NUM_SEGMENTS];
|
|
|
|
TextRun()
|
|
{
|
|
Reset();
|
|
}
|
|
|
|
void Reset()
|
|
{
|
|
mNumSegments = 0;
|
|
mTotalNumChars = 0;
|
|
mTotalContentLen = 0;
|
|
}
|
|
|
|
// Returns PR_TRUE if we're currently buffering text
|
|
PRBool IsBuffering()
|
|
{
|
|
return mNumSegments > 0;
|
|
}
|
|
|
|
void AddSegment(PRInt32 aNumChars, PRInt32 aContentLen, PRBool aIsWhitespace)
|
|
{
|
|
NS_PRECONDITION(mNumSegments < TEXT_MAX_NUM_SEGMENTS, "segment overflow");
|
|
#ifdef IBMBIDI
|
|
if (mNumSegments >= TEXT_MAX_NUM_SEGMENTS) {
|
|
return;
|
|
}
|
|
#endif // IBMBIDI
|
|
mTotalNumChars += aNumChars;
|
|
mBreaks[mNumSegments] = mTotalNumChars;
|
|
mSegments[mNumSegments].mIsWhitespace = aIsWhitespace;
|
|
mTotalContentLen += aContentLen;
|
|
mSegments[mNumSegments].mContentLen = PRUint32(mTotalContentLen);
|
|
mNumSegments++;
|
|
}
|
|
};
|
|
|
|
// Transforms characters in place from ascii to Unicode
|
|
static void
|
|
TransformTextToUnicode(char* aText, PRInt32 aNumChars)
|
|
{
|
|
// Go backwards over the characters and convert them.
|
|
unsigned char* cp1 = (unsigned char*)aText + aNumChars - 1;
|
|
PRUnichar* cp2 = (PRUnichar*)aText + (aNumChars - 1);
|
|
|
|
while (aNumChars-- > 0) {
|
|
// XXX: If you crash here then you may see the issue described
|
|
// in http://bugzilla.mozilla.org/show_bug.cgi?id=36146#c44
|
|
*cp2-- = PRUnichar(*cp1--);
|
|
}
|
|
}
|
|
|
|
PRUint32
|
|
nsTextFrame::EstimateNumChars(PRUint32 aAvailableWidth,
|
|
PRUint32 aAverageCharWidth)
|
|
{
|
|
// Estimate the number of characters that will fit. Use 105% of the available
|
|
// width divided by the average character width.
|
|
// If mAveCharWidth is zero, we can fit the entire line.
|
|
if (aAverageCharWidth == 0) {
|
|
return PR_UINT32_MAX;
|
|
}
|
|
|
|
PRUint32 estimatedNumChars = aAvailableWidth / aAverageCharWidth;
|
|
return estimatedNumChars + estimatedNumChars / 20;
|
|
}
|
|
|
|
// Replaced by precompiled CCMap (see bug 180266). To update the list
|
|
// of characters, see one of files included below. As for the way
|
|
// the original list of characters was obtained by Frank Tang, see bug 54467.
|
|
// Updated to fix the regression (bug 263411). The list contains
|
|
// characters of the following Unicode character classes : Ps, Pi, Po, Pf, Pe.
|
|
// (ref.: http://www.w3.org/TR/2004/CR-CSS21-20040225/selector.html#first-letter)
|
|
// Note that the file does NOT yet include non-BMP characters because
|
|
// there's no point including them without fixing the way we identify
|
|
// 'first-letter' currently working only with BMP characters.
|
|
#include "punct_marks.ccmap"
|
|
DEFINE_CCMAP(gPuncCharsCCMap, const);
|
|
|
|
#define IsPunctuationMark(ch) (CCMAP_HAS_CHAR(gPuncCharsCCMap, ch))
|
|
|
|
nsReflowStatus
|
|
nsTextFrame::MeasureText(nsPresContext* aPresContext,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsTextTransformer& aTx,
|
|
nsILineBreaker* aLb,
|
|
TextStyle& aTs,
|
|
TextReflowData& aTextData)
|
|
{
|
|
PRBool firstThing = PR_TRUE;
|
|
nscoord maxWidth = aReflowState.availableWidth;
|
|
nsLineLayout& lineLayout = *aReflowState.mLineLayout;
|
|
PRInt32 contentLength = aTx.GetContentLength();
|
|
PRInt32 startingOffset = aTextData.mOffset;
|
|
PRInt32 prevOffset = -1;
|
|
PRInt32 column = mColumn;
|
|
PRInt32 prevColumn = column;
|
|
nscoord prevMaxWordWidth = 0, prevAscent = 0, prevDescent = 0;
|
|
PRInt32 lastWordLen = 0;
|
|
PRUnichar* lastWordPtr = nsnull;
|
|
PRBool endsInWhitespace = PR_FALSE;
|
|
PRBool endsInNewline = PR_FALSE;
|
|
PRBool justDidFirstLetter = PR_FALSE;
|
|
nsTextDimensions dimensions, lastWordDimensions;
|
|
PRBool measureTextRuns = PR_FALSE;
|
|
|
|
if (contentLength == 0) {
|
|
aTextData.mX = 0;
|
|
aTextData.mAscent = 0;
|
|
aTextData.mDescent = 0;
|
|
return NS_FRAME_COMPLETE;
|
|
}
|
|
#if defined(_WIN32) || defined(XP_OS2) || defined(MOZ_X11) || defined(XP_BEOS)
|
|
// see if we have implementation for GetTextDimensions()
|
|
PRUint32 hints = 0;
|
|
aReflowState.rendContext->GetHints(hints);
|
|
if (hints & NS_RENDERING_HINT_FAST_MEASURE) {
|
|
measureTextRuns = !aTextData.mComputeMaxWordWidth && !aTs.mPreformatted &&
|
|
!aTs.mSmallCaps && !aTs.mWordSpacing && !aTs.mLetterSpacing &&
|
|
aTextData.mWrapping;
|
|
}
|
|
// Don't measure text runs with letter spacing active, it doesn't work
|
|
// it also doesn't work if we are not word-wrapping (bug 42832)
|
|
#endif /* defined(_WIN32) || defined(XP_OS2) || defined(MOZ_X11) || defined(XP_BEOS)*/
|
|
TextRun textRun;
|
|
PRUint32 estimatedNumChars = EstimateNumChars(maxWidth - aTextData.mX,
|
|
aTs.mAveCharWidth);
|
|
|
|
#ifdef IBMBIDI
|
|
nsTextFrame* nextBidi = nsnull;
|
|
PRInt32 start = -1, end;
|
|
|
|
if (mState & NS_FRAME_IS_BIDI) {
|
|
nextBidi = NS_STATIC_CAST(nsTextFrame*,
|
|
aPresContext->PropertyTable()->GetProperty(this,
|
|
nsLayoutAtoms::nextBidi));
|
|
|
|
if (nextBidi) {
|
|
if (mContentLength < 1) {
|
|
mContentLength = 1;
|
|
}
|
|
nextBidi->GetOffsets(start, end);
|
|
if (start <= mContentOffset) {
|
|
nextBidi->AdjustOffsetsForBidi(mContentOffset + mContentLength, end);
|
|
}
|
|
else {
|
|
mContentLength = start - mContentOffset;
|
|
}
|
|
}
|
|
}
|
|
#endif //IBMBIDI
|
|
|
|
aTextData.mX = 0;
|
|
if (aTextData.mMeasureText) {
|
|
aTs.mNormalFont->GetMaxAscent(aTextData.mAscent);
|
|
aTs.mNormalFont->GetMaxDescent(aTextData.mDescent);
|
|
}
|
|
PRBool firstWordDone = PR_FALSE;
|
|
for (;;) {
|
|
#ifdef IBMBIDI
|
|
if (nextBidi && (mContentLength <= 0) ) {
|
|
if (textRun.IsBuffering()) {
|
|
// Measure the remaining text
|
|
goto MeasureTextRun;
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
#endif // IBMBIDI
|
|
// Get next word/whitespace from the text
|
|
PRBool isWhitespace, wasTransformed;
|
|
PRInt32 wordLen, contentLen;
|
|
union {
|
|
char* bp1;
|
|
PRUnichar* bp2;
|
|
};
|
|
#ifdef IBMBIDI
|
|
wordLen = start;
|
|
#endif // IBMBIDI
|
|
|
|
bp2 = aTx.GetNextWord(aTextData.mInWord, &wordLen, &contentLen, &isWhitespace,
|
|
&wasTransformed, textRun.mNumSegments == 0);
|
|
|
|
// We need to set aTextData.mCanBreakBefore to true after 1st word. But we can't set
|
|
// aTextData.mCanBreakBefore without seeing the 2nd word. That's because this frame
|
|
// may only contain part of one word, the other part is in next frame.
|
|
// we don't care if first word is whitespace, that will be addressed later.
|
|
if (!aTextData.mCanBreakBefore && !firstThing && !isWhitespace) {
|
|
firstWordDone = PR_TRUE;
|
|
}
|
|
|
|
#ifdef IBMBIDI
|
|
if (nextBidi) {
|
|
mContentLength -= contentLen;
|
|
|
|
if (mContentLength < 0) {
|
|
contentLen += mContentLength;
|
|
wordLen = PR_MIN(wordLen, contentLen);
|
|
}
|
|
}
|
|
#endif // IBMBIDI
|
|
// Remember if the text was transformed
|
|
if (wasTransformed) {
|
|
mState |= TEXT_WAS_TRANSFORMED;
|
|
}
|
|
|
|
if (bp2) {
|
|
if (firstWordDone) {
|
|
// The first word has been processed, and 2nd word is seen
|
|
// we can set it be breakable here after.
|
|
aTextData.mCanBreakBefore = PR_TRUE;
|
|
}
|
|
} else {
|
|
if (textRun.IsBuffering()) {
|
|
// Measure the remaining text
|
|
goto MeasureTextRun;
|
|
}
|
|
else {
|
|
// Advance the offset in case we just consumed a bunch of
|
|
// discarded characters. Otherwise, if this is the first piece
|
|
// of content for this frame we will attempt to break-before it.
|
|
aTextData.mOffset += contentLen;
|
|
break;
|
|
}
|
|
}
|
|
|
|
lastWordLen = wordLen;
|
|
lastWordPtr = bp2;
|
|
aTextData.mInWord = PR_FALSE;
|
|
|
|
// Measure the word/whitespace
|
|
PRUnichar firstChar;
|
|
if (aTx.TransformedTextIsAscii()) {
|
|
firstChar = *bp1;
|
|
} else {
|
|
firstChar = *bp2;
|
|
}
|
|
if (isWhitespace) {
|
|
if ('\n' == firstChar) {
|
|
// We hit a newline. Stop looping.
|
|
NS_WARN_IF_FALSE(aTs.mPreformatted, "newline w/o ts.mPreformatted");
|
|
prevOffset = aTextData.mOffset;
|
|
aTextData.mOffset++;
|
|
endsInWhitespace = PR_TRUE;
|
|
endsInNewline = PR_TRUE;
|
|
break;
|
|
}
|
|
if (aTextData.mSkipWhitespace) {
|
|
aTextData.mOffset += contentLen;
|
|
aTextData.mSkipWhitespace = PR_FALSE;
|
|
|
|
if (wasTransformed) {
|
|
// As long as there were no discarded characters, then don't consider
|
|
// skipped leading whitespace as being transformed
|
|
if (wordLen == contentLen) {
|
|
mState &= ~TEXT_WAS_TRANSFORMED;
|
|
}
|
|
}
|
|
|
|
// Only set flag when we actually do skip whitespace
|
|
mState |= TEXT_SKIP_LEADING_WS;
|
|
continue;
|
|
}
|
|
firstThing = PR_FALSE;
|
|
|
|
// NOTE: Even if the textRun absorbs the whitespace below, we still
|
|
// want to remember that we're breakable.
|
|
aTextData.mCanBreakBefore = PR_TRUE;
|
|
aTextData.mFirstLetterOK = PR_FALSE;
|
|
|
|
if ('\t' == firstChar) {
|
|
// Expand tabs to the proper width
|
|
wordLen = 8 - (7 & column);
|
|
// Apply word spacing to every space derived from a tab
|
|
dimensions.width = (aTs.mSpaceWidth + aTs.mWordSpacing + aTs.mLetterSpacing)*wordLen;
|
|
|
|
// Because we have to expand the tab when rendering consider that
|
|
// a transformation of the text
|
|
mState |= TEXT_WAS_TRANSFORMED;
|
|
}
|
|
else if (textRun.IsBuffering()) {
|
|
// Add a whitespace segment
|
|
textRun.AddSegment(wordLen, contentLen, PR_TRUE);
|
|
continue;
|
|
}
|
|
else {
|
|
// Apply word spacing to every space, if there's more than one
|
|
dimensions.width = wordLen*(aTs.mWordSpacing + aTs.mLetterSpacing + aTs.mSpaceWidth);// XXX simplistic
|
|
}
|
|
|
|
//Even if there is not enough space for this "space", we still put it
|
|
//here instead of next line
|
|
prevColumn = column;
|
|
column += wordLen;
|
|
endsInWhitespace = PR_TRUE;
|
|
prevOffset = aTextData.mOffset;
|
|
aTextData.mOffset += contentLen;
|
|
|
|
if (aTextData.mMeasureText) {
|
|
//if we're wrapping, then don't add the whitespace width to the
|
|
// x-offset unless the whitespace will fit within maxWidth.''
|
|
if (aTextData.mWrapping) {
|
|
if (aTextData.mX + dimensions.width <= maxWidth) {
|
|
aTextData.mX += dimensions.width;
|
|
}
|
|
else {
|
|
// since we didn't add the trailing space width, set this flag so that
|
|
// we will not trim this non-existing space
|
|
aTextData.mTrailingSpaceTrimmed = PR_TRUE;
|
|
break;
|
|
}
|
|
}
|
|
else {
|
|
//if we're not wrapping, then always advance
|
|
// the x-offset regardless of maxWidth
|
|
aTextData.mX += dimensions.width;
|
|
}
|
|
} //(aTextData.mMeasureText)
|
|
}
|
|
else {
|
|
firstThing = PR_FALSE;
|
|
aTextData.mSkipWhitespace = PR_FALSE;
|
|
|
|
if (aTextData.mFirstLetterOK) {
|
|
if (IsPunctuationMark(firstChar)) {
|
|
if (contentLen > 1)
|
|
{
|
|
wordLen = 2;
|
|
contentLen = 2;
|
|
}
|
|
}
|
|
else {
|
|
wordLen = 1;
|
|
contentLen = 1;
|
|
}
|
|
justDidFirstLetter = PR_TRUE;
|
|
}
|
|
|
|
if (aTextData.mMeasureText) {
|
|
if (measureTextRuns && !justDidFirstLetter) {
|
|
// Add another word to the text run
|
|
textRun.AddSegment(wordLen, contentLen, PR_FALSE);
|
|
|
|
// See if we should measure the text
|
|
if ((textRun.mTotalNumChars >= estimatedNumChars) ||
|
|
(textRun.mNumSegments >= (TEXT_MAX_NUM_SEGMENTS - 1))) {
|
|
goto MeasureTextRun;
|
|
}
|
|
}
|
|
else {
|
|
if (aTs.mSmallCaps) {
|
|
MeasureSmallCapsText(aReflowState, aTs, bp2, wordLen, PR_FALSE, &dimensions);
|
|
}
|
|
else {
|
|
// Measure just the one word
|
|
if (aTx.TransformedTextIsAscii()) {
|
|
aReflowState.rendContext->GetTextDimensions(bp1, wordLen, dimensions);
|
|
} else {
|
|
aReflowState.rendContext->GetTextDimensions(bp2, wordLen, dimensions);
|
|
}
|
|
#ifdef MOZ_MATHML
|
|
// If GetBoundingMetrics is available, use the exact glyph metrics
|
|
// for ::first-letter
|
|
// XXX remove the #ifdef if GetBoundingMetrics becomes mainstream
|
|
if (justDidFirstLetter) {
|
|
nsresult res;
|
|
nsBoundingMetrics bm;
|
|
if (aTx.TransformedTextIsAscii()) {
|
|
res = aReflowState.rendContext->GetBoundingMetrics(bp1, wordLen, bm);
|
|
} else {
|
|
res = aReflowState.rendContext->GetBoundingMetrics(bp2, wordLen, bm);
|
|
}
|
|
if (NS_SUCCEEDED(res)) {
|
|
aTextData.mAscent = dimensions.ascent = bm.ascent;
|
|
aTextData.mDescent = dimensions.descent = bm.descent;
|
|
}
|
|
}
|
|
#endif
|
|
if (aTs.mLetterSpacing) {
|
|
dimensions.width += aTs.mLetterSpacing * wordLen;
|
|
}
|
|
}
|
|
lastWordDimensions = dimensions;
|
|
|
|
// See if there is room for the text
|
|
if ((0 != aTextData.mX) && aTextData.mWrapping && (aTextData.mX + dimensions.width > maxWidth)) {
|
|
// The text will not fit.
|
|
break;
|
|
}
|
|
prevMaxWordWidth = aTextData.mMaxWordWidth;
|
|
prevAscent = aTextData.mAscent;
|
|
prevDescent = aTextData.mDescent;
|
|
|
|
aTextData.mX += dimensions.width;
|
|
if (dimensions.width > aTextData.mMaxWordWidth) {
|
|
aTextData.mMaxWordWidth = dimensions.width;
|
|
}
|
|
if (aTextData.mAscent < dimensions.ascent) {
|
|
aTextData.mAscent = dimensions.ascent;
|
|
}
|
|
if (aTextData.mDescent < dimensions.descent) {
|
|
aTextData.mDescent = dimensions.descent;
|
|
}
|
|
|
|
prevColumn = column;
|
|
column += wordLen;
|
|
endsInWhitespace = PR_FALSE;
|
|
prevOffset = aTextData.mOffset;
|
|
aTextData.mOffset += contentLen;
|
|
if (justDidFirstLetter) {
|
|
// Time to stop
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
// We didn't measure the text, but we need to update our state
|
|
prevColumn = column;
|
|
column += wordLen;
|
|
endsInWhitespace = PR_FALSE;
|
|
prevOffset = aTextData.mOffset;
|
|
aTextData.mOffset += contentLen;
|
|
if (justDidFirstLetter) {
|
|
// Time to stop
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
continue;
|
|
|
|
MeasureTextRun:
|
|
#if defined(_WIN32) || defined(XP_OS2) || defined(MOZ_X11) || defined(XP_BEOS)
|
|
// see if we have implementation for GetTextDimensions()
|
|
if (hints & NS_RENDERING_HINT_FAST_MEASURE) {
|
|
PRInt32 numCharsFit;
|
|
// These calls can return numCharsFit not positioned at a break in the textRun. Beware.
|
|
if (aTx.TransformedTextIsAscii()) {
|
|
aReflowState.rendContext->GetTextDimensions((char*)aTx.GetWordBuffer(), textRun.mTotalNumChars,
|
|
maxWidth - aTextData.mX,
|
|
textRun.mBreaks, textRun.mNumSegments,
|
|
dimensions, numCharsFit, lastWordDimensions);
|
|
} else {
|
|
aReflowState.rendContext->GetTextDimensions(aTx.GetWordBuffer(), textRun.mTotalNumChars,
|
|
maxWidth - aTextData.mX,
|
|
textRun.mBreaks, textRun.mNumSegments,
|
|
dimensions, numCharsFit, lastWordDimensions);
|
|
}
|
|
// See how much of the text fit
|
|
if ((0 != aTextData.mX) && aTextData.mWrapping && (aTextData.mX + dimensions.width > maxWidth)) {
|
|
// None of the text fits
|
|
#ifdef IBMBIDI
|
|
nextBidi = nsnull;
|
|
#endif // IBMBIDI
|
|
break;
|
|
}
|
|
|
|
// Find the index of the last segment that fit
|
|
PRInt32 lastSegment;
|
|
if (numCharsFit >= textRun.mTotalNumChars) { // fast path, normal case
|
|
NS_ASSERTION(numCharsFit == textRun.mTotalNumChars, "shouldn't overshoot");
|
|
lastSegment = textRun.mNumSegments - 1;
|
|
} else {
|
|
for (lastSegment = 0; textRun.mBreaks[lastSegment] < numCharsFit; lastSegment++) ;
|
|
NS_ASSERTION(lastSegment < textRun.mNumSegments, "failed to find segment");
|
|
// now we have textRun.mBreaks[lastSegment] >= numCharsFit
|
|
/* O'Callahan XXX: This snippet together with the snippet below prevents mail from loading
|
|
Justification seems to work just fine without these changes.
|
|
We get into trouble in a case where lastSegment gets set to -1
|
|
|
|
if (textRun.mBreaks[lastSegment] > numCharsFit) {
|
|
// NOTE: this segment did not actually fit!
|
|
lastSegment--;
|
|
}
|
|
*/
|
|
}
|
|
|
|
/* O'Callahan XXX: This snippet together with the snippet above prevents mail from loading
|
|
|
|
if (lastSegment < 0) {
|
|
// no segments fit
|
|
break;
|
|
} else */
|
|
if (lastSegment == 0) {
|
|
// Only one segment fit
|
|
prevColumn = column;
|
|
prevOffset = aTextData.mOffset;
|
|
} else {
|
|
// The previous state is for the next to last word
|
|
// NOTE: The textRun data are relative to the last updated column and offset!
|
|
prevColumn = column + textRun.mBreaks[lastSegment - 1];
|
|
prevOffset = aTextData.mOffset + textRun.mSegments[lastSegment - 1].ContentLen();
|
|
}
|
|
|
|
aTextData.mX += dimensions.width;
|
|
if (aTextData.mAscent < dimensions.ascent) {
|
|
aTextData.mAscent = dimensions.ascent;
|
|
}
|
|
if (aTextData.mDescent < dimensions.descent) {
|
|
aTextData.mDescent = dimensions.descent;
|
|
}
|
|
// this is where to backup if line-breaking happens to push the last word
|
|
prevAscent = aTextData.mAscent;
|
|
prevDescent = aTextData.mDescent;
|
|
// we can now consider the last word since we know where to backup
|
|
if (aTextData.mAscent < lastWordDimensions.ascent) {
|
|
aTextData.mAscent = lastWordDimensions.ascent;
|
|
}
|
|
if (aTextData.mDescent < lastWordDimensions.descent) {
|
|
aTextData.mDescent = lastWordDimensions.descent;
|
|
}
|
|
|
|
column += numCharsFit;
|
|
aTextData.mOffset += textRun.mSegments[lastSegment].ContentLen();
|
|
endsInWhitespace = textRun.mSegments[lastSegment].IsWhitespace();
|
|
|
|
// If all the text didn't fit, then we're done
|
|
if (numCharsFit != textRun.mTotalNumChars) {
|
|
#ifdef IBMBIDI
|
|
nextBidi = nsnull;
|
|
#endif // IBMBIDI
|
|
break;
|
|
}
|
|
|
|
#ifdef IBMBIDI
|
|
if (nextBidi && (mContentLength <= 0) ) {
|
|
break;
|
|
}
|
|
#endif // IBMBIDI
|
|
|
|
if (nsnull == bp2) {
|
|
// No more text so we're all finished. Advance the offset in case the last
|
|
// call to GetNextWord() discarded characters
|
|
aTextData.mOffset += contentLen;
|
|
break;
|
|
}
|
|
|
|
// Reset the number of text run segments
|
|
textRun.Reset();
|
|
|
|
// Estimate the remaining number of characters we think will fit
|
|
estimatedNumChars = EstimateNumChars(maxWidth - aTextData.mX,
|
|
aTs.mAveCharWidth);
|
|
}
|
|
#else /* defined(_WIN32) || defined(XP_OS2) || defined(MOZ_X11) || defined(XP_BEOS) */
|
|
int unused = -1;
|
|
#endif /* defined(_WIN32) || defined(XP_OS2) || defined(MOZ_X11) || defined(XP_BEOS) */
|
|
}
|
|
|
|
// If we didn't actually measure any text, then make sure it looks
|
|
// like we did
|
|
if (!aTextData.mMeasureText) {
|
|
aTextData.mAscent = mAscent;
|
|
aTextData.mDescent = mRect.height - aTextData.mAscent;
|
|
aTextData.mX = mRect.width;
|
|
if (mState & TEXT_TRIMMED_WS) {
|
|
// Add back in the width of a space since it was trimmed away last time
|
|
// NOTE: Trailing whitespace includes word and letter spacing!
|
|
aTextData.mX += aTs.mSpaceWidth + aTs.mWordSpacing + aTs.mLetterSpacing;
|
|
}
|
|
}
|
|
|
|
// Post processing logic to deal with word-breaking that spans
|
|
// multiple frames.
|
|
if (lineLayout.InWord()) {
|
|
// We are already in a word. This means a text frame prior to this
|
|
// one had a fragment of a nbword that is joined with this
|
|
// frame. It also means that the prior frame already found this
|
|
// frame and recorded it as part of the word.
|
|
#ifdef DEBUG_WORD_WRAPPING
|
|
ListTag(stdout);
|
|
printf(": in word; skipping\n");
|
|
#endif
|
|
lineLayout.ForgetWordFrame(this);
|
|
}
|
|
|
|
if (!lineLayout.InWord()) {
|
|
// There is no currently active word. This frame may contain the
|
|
// start of one.
|
|
if (endsInWhitespace) {
|
|
// Nope, this frame doesn't start a word.
|
|
lineLayout.ForgetWordFrames();
|
|
}
|
|
else if ((aTextData.mOffset == contentLength) && (prevOffset >= 0)) {
|
|
// Force breakable to false when we aren't wrapping (this
|
|
// guarantees that the combined word will stay together)
|
|
if (!aTextData.mWrapping) {
|
|
aTextData.mCanBreakBefore = PR_FALSE;
|
|
}
|
|
|
|
// This frame does start a word. However, there is no point
|
|
// messing around with it if we are already out of room. We
|
|
// always have room if we are not breakable.
|
|
if (!aTextData.mCanBreakBefore || (aTextData.mX <= maxWidth)) {
|
|
// There is room for this word fragment. It's possible that
|
|
// this word fragment is the end of the text-run. If it's not
|
|
// then we continue with the look-ahead processing.
|
|
nsIFrame* next = lineLayout.FindNextText(aPresContext, this);
|
|
if (nsnull != next) {
|
|
#ifdef DEBUG_WORD_WRAPPING
|
|
nsAutoString tmp(aTx.GetWordBuffer(), lastWordLen);
|
|
ListTag(stdout);
|
|
printf(": start='");
|
|
fputs(NS_LossyConvertUCS2toASCII(tmp).get(), stdout);
|
|
printf("' lastWordLen=%d baseWidth=%d prevOffset=%d offset=%d next=",
|
|
lastWordLen, lastWordDimensions.width, prevOffset, aTextData.mOffset);
|
|
ListTag(stdout, next);
|
|
printf("\n");
|
|
#endif
|
|
PRUnichar* pWordBuf = lastWordPtr;
|
|
PRUint32 wordBufLen = aTx.GetWordBufferLength() -
|
|
(lastWordPtr - aTx.GetWordBuffer());
|
|
|
|
if (aTx.TransformedTextIsAscii()) {
|
|
// The text transform buffer contains ascii characters, so
|
|
// transform it to Unicode
|
|
NS_ASSERTION(wordBufLen >= PRUint32(lastWordLen), "no room to transform in place");
|
|
TransformTextToUnicode((char*)lastWordPtr, lastWordLen);
|
|
}
|
|
|
|
// Look ahead in the text-run and compute the final word
|
|
// width, taking into account any style changes and stopping
|
|
// at the first breakable point.
|
|
if (!aTextData.mMeasureText || (lastWordDimensions.width == -1)) {
|
|
// We either didn't measure any text or we measured multiple words
|
|
// at once so either way we don't know lastWordDimensions. We'll have to
|
|
// compute it now
|
|
if (prevOffset == startingOffset) {
|
|
// There's only one word, so we don't have to measure after all
|
|
lastWordDimensions.width = aTextData.mX;
|
|
}
|
|
else if (aTs.mSmallCaps) {
|
|
MeasureSmallCapsText(aReflowState, aTs, pWordBuf,
|
|
lastWordLen, PR_FALSE, &lastWordDimensions);
|
|
}
|
|
else {
|
|
aReflowState.rendContext->GetTextDimensions(pWordBuf, lastWordLen, lastWordDimensions);
|
|
if (aTs.mLetterSpacing) {
|
|
lastWordDimensions.width += aTs.mLetterSpacing * lastWordLen;
|
|
}
|
|
}
|
|
}
|
|
nsTextDimensions wordDimensions = ComputeTotalWordDimensions(aPresContext, aLb,
|
|
lineLayout,
|
|
aReflowState, next,
|
|
lastWordDimensions,
|
|
pWordBuf,
|
|
lastWordLen,
|
|
wordBufLen,
|
|
aTextData.mCanBreakBefore);
|
|
if (!aTextData.mCanBreakBefore || (aTextData.mX - lastWordDimensions.width + wordDimensions.width <= maxWidth)) {
|
|
// The fully joined word has fit. Account for the joined
|
|
// word's affect on the max-element-size here (since the
|
|
// joined word is large than it's pieces, the right effect
|
|
// will occur from the perspective of the container
|
|
// reflowing this frame)
|
|
if (wordDimensions.width > aTextData.mMaxWordWidth) {
|
|
aTextData.mMaxWordWidth = wordDimensions.width;
|
|
}
|
|
// Now that we now that we will retain the last word, we should
|
|
// account for its ascent and descent
|
|
if (aTextData.mAscent < lastWordDimensions.ascent) {
|
|
aTextData.mAscent = lastWordDimensions.ascent;
|
|
}
|
|
if (aTextData.mDescent < lastWordDimensions.descent) {
|
|
aTextData.mDescent = lastWordDimensions.descent;
|
|
}
|
|
}
|
|
else {
|
|
#ifdef NOISY_REFLOW
|
|
ListTag(stdout);
|
|
printf(": look-ahead (didn't fit) x=%d wordWidth=%d lastWordWidth=%d\n",
|
|
aTextData.mX, wordDimensions.width, lastWordDimensions.width);
|
|
#endif
|
|
// The fully joined word won't fit. We need to reduce our
|
|
// size by lastWordDimensions
|
|
aTextData.mX -= lastWordDimensions.width;
|
|
aTextData.mMaxWordWidth = prevMaxWordWidth;
|
|
aTextData.mOffset = prevOffset;
|
|
column = prevColumn;
|
|
if (aTextData.mMeasureText) {
|
|
aTextData.mAscent = prevAscent;
|
|
aTextData.mDescent = prevDescent;
|
|
}
|
|
// else {
|
|
// XXX we didn't measure the text, and so we don't know where to back up,
|
|
// we will retain our current height. However, there is a possible
|
|
// edge case that is not handled: since we just chopped the last word,
|
|
// our remaining text could have got shorter.
|
|
// }
|
|
#ifdef DEBUG_WORD_WRAPPING
|
|
printf(" x=%d maxWordWidth=%d len=%d\n", aTextData.mX, aTextData.mMaxWordWidth,
|
|
aTextData.mOffset - startingOffset);
|
|
#endif
|
|
lineLayout.ForgetWordFrames();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Inform line layout of how this piece of text ends in whitespace
|
|
// (only text objects do this). Note that if x is zero then this
|
|
// text object collapsed into nothingness which means it shouldn't
|
|
// effect the current setting of the ends-in-whitespace flag.
|
|
lineLayout.SetColumn(column);
|
|
lineLayout.SetUnderstandsWhiteSpace(PR_TRUE);
|
|
if (0 != aTextData.mX) {
|
|
lineLayout.SetEndsInWhiteSpace(endsInWhitespace);
|
|
}
|
|
if (justDidFirstLetter) {
|
|
lineLayout.SetFirstLetterFrame(this);
|
|
lineLayout.SetFirstLetterStyleOK(PR_FALSE);
|
|
mState |= TEXT_FIRST_LETTER;
|
|
}
|
|
|
|
// Return our reflow status
|
|
nsReflowStatus rs = (aTextData.mOffset == contentLength)
|
|
#ifdef IBMBIDI
|
|
|| (aTextData.mOffset == start)
|
|
#endif // IBMBIDI
|
|
? NS_FRAME_COMPLETE
|
|
: NS_FRAME_NOT_COMPLETE;
|
|
if (endsInNewline) {
|
|
rs = NS_INLINE_LINE_BREAK_AFTER(rs);
|
|
lineLayout.SetLineEndsInBR(PR_TRUE);
|
|
}
|
|
else if ((aTextData.mOffset != contentLength) && (aTextData.mOffset == startingOffset)) {
|
|
// Break-before a long-word that doesn't fit here
|
|
rs = NS_INLINE_LINE_BREAK_BEFORE();
|
|
}
|
|
|
|
return rs;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::Reflow(nsPresContext* aPresContext,
|
|
nsHTMLReflowMetrics& aMetrics,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
DO_GLOBAL_REFLOW_COUNT("nsTextFrame", aReflowState.reason);
|
|
DISPLAY_REFLOW(aPresContext, this, aReflowState, aMetrics, aStatus);
|
|
#ifdef NOISY_REFLOW
|
|
ListTag(stdout);
|
|
printf(": BeginReflow: availableSize=%d,%d\n",
|
|
aReflowState.availableWidth, aReflowState.availableHeight);
|
|
#endif
|
|
|
|
mState &= ~TEXT_IS_END_OF_LINE;
|
|
|
|
// XXX If there's no line layout, we shouldn't even have created this
|
|
// frame. This may happen if, for example, this is text inside a table
|
|
// but not inside a cell. For now, just don't reflow.
|
|
if (nsnull == aReflowState.mLineLayout) {
|
|
// XXX Add a method to aMetrics that does this; we do it several places
|
|
aMetrics.width = 0;
|
|
aMetrics.height = 0;
|
|
aMetrics.ascent = 0;
|
|
aMetrics.descent = 0;
|
|
if (aMetrics.mComputeMEW) {
|
|
aMetrics.mMaxElementWidth = 0;
|
|
}
|
|
#ifdef MOZ_MATHML
|
|
if (NS_REFLOW_CALC_BOUNDING_METRICS & aMetrics.mFlags)
|
|
aMetrics.mBoundingMetrics.Clear();
|
|
#endif
|
|
return NS_OK;
|
|
}
|
|
|
|
// Get starting offset into the content
|
|
PRInt32 startingOffset = 0;
|
|
nsIFrame* prevInFlow = GetPrevInFlow();
|
|
if (nsnull != prevInFlow) {
|
|
nsTextFrame* prev = (nsTextFrame*)prevInFlow;
|
|
startingOffset = prev->mContentOffset + prev->mContentLength;
|
|
|
|
// If our starting offset doesn't agree with mContentOffset, then our
|
|
// prev-in-flow has changed the number of characters it maps and so we
|
|
// need to measure text and not try and optimize a resize reflow
|
|
if (startingOffset != mContentOffset) {
|
|
mState &= ~TEXT_OPTIMIZE_RESIZE;
|
|
}
|
|
}
|
|
nsLineLayout& lineLayout = *aReflowState.mLineLayout;
|
|
TextStyle ts(aPresContext, *aReflowState.rendContext, mStyleContext);
|
|
|
|
if ( (mContentLength > 0) && (mState & NS_FRAME_IS_BIDI) ) {
|
|
startingOffset = mContentOffset;
|
|
}
|
|
|
|
if (aPresContext->BidiEnabled()) {
|
|
nsCharType charType = eCharType_LeftToRight;
|
|
PRUint32 hints = 0;
|
|
aReflowState.rendContext->GetHints(hints);
|
|
charType = (nsCharType)NS_PTR_TO_INT32(aPresContext->PropertyTable()->GetProperty(this, nsLayoutAtoms::charType));
|
|
if ((eCharType_RightToLeftArabic == charType &&
|
|
(hints & NS_RENDERING_HINT_ARABIC_SHAPING) == NS_RENDERING_HINT_ARABIC_SHAPING) ||
|
|
(eCharType_RightToLeft == charType &&
|
|
(hints & NS_RENDERING_HINT_BIDI_REORDERING) == NS_RENDERING_HINT_BIDI_REORDERING)) {
|
|
aPresContext->SetIsBidiSystem(PR_TRUE);
|
|
}
|
|
}
|
|
|
|
// Clear out the reflow state flags in mState (without destroying
|
|
// the TEXT_BLINK_ON bit).
|
|
PRBool lastTimeWeSkippedLeadingWS = 0 != (mState & TEXT_SKIP_LEADING_WS);
|
|
mState &= ~TEXT_REFLOW_FLAGS;
|
|
if (aReflowState.mFlags.mBlinks) {
|
|
if (0 == (mState & TEXT_BLINK_ON)) {
|
|
mState |= TEXT_BLINK_ON;
|
|
nsBlinkTimer::AddBlinkFrame(aPresContext, this);
|
|
}
|
|
}
|
|
else {
|
|
if (0 != (mState & TEXT_BLINK_ON)) {
|
|
mState &= ~TEXT_BLINK_ON;
|
|
nsBlinkTimer::RemoveBlinkFrame(this);
|
|
}
|
|
}
|
|
|
|
PRBool wrapping = (NS_STYLE_WHITESPACE_NORMAL == ts.mText->mWhiteSpace) ||
|
|
(NS_STYLE_WHITESPACE_MOZ_PRE_WRAP == ts.mText->mWhiteSpace);
|
|
|
|
// Set whitespace skip flag
|
|
PRBool skipWhitespace = PR_FALSE;
|
|
if (!ts.mPreformatted) {
|
|
if (lineLayout.GetEndsInWhiteSpace()) {
|
|
skipWhitespace = PR_TRUE;
|
|
}
|
|
}
|
|
|
|
nscoord maxWidth = aReflowState.availableWidth;
|
|
|
|
// Setup text transformer to transform this frames text content
|
|
nsIDocument* doc = mContent->GetDocument();
|
|
if (!doc) {
|
|
NS_NOTREACHED("Content has no document");
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
PRBool forceArabicShaping = (ts.mSmallCaps ||
|
|
(0 != ts.mWordSpacing) ||
|
|
(0 != ts.mLetterSpacing) ||
|
|
ts.mJustifying);
|
|
nsILineBreaker *lb = doc->GetLineBreaker();
|
|
nsTextTransformer tx(lb, nsnull, aPresContext);
|
|
// Keep the text in ascii if possible. Note that if we're measuring small
|
|
// caps text then transform to Unicode because the helper function only
|
|
// accepts Unicode text
|
|
nsresult rv = tx.Init(this, mContent, startingOffset, forceArabicShaping, !ts.mSmallCaps);
|
|
if (NS_OK != rv) {
|
|
return rv;
|
|
}
|
|
//PRInt32 contentLength = tx.GetContentLength();
|
|
|
|
// Set inWord to true if we are part of a previous piece of text's word. This
|
|
// is only valid for one pass through the measuring loop.
|
|
PRBool inWord = lineLayout.InWord() || ((nsnull != prevInFlow) && (((nsTextFrame*)prevInFlow)->mState & TEXT_FIRST_LETTER));
|
|
if (inWord) {
|
|
mState |= TEXT_IN_WORD;
|
|
}
|
|
mState &= ~TEXT_FIRST_LETTER;
|
|
|
|
PRInt32 column = lineLayout.GetColumn();
|
|
PRInt32 prevColumn = mColumn;
|
|
mColumn = column;
|
|
PRBool measureText = PR_TRUE;
|
|
|
|
// We can avoid actually measuring the text if:
|
|
// - this is a resize reflow
|
|
// - we're not dirty (see CharacterDataChanged() function)
|
|
// - we don't have a next in flow
|
|
// - the previous reflow successfully reflowed all text in the
|
|
// available space
|
|
// - we aren't computing the max element size (that requires we measure
|
|
// text)
|
|
// - skipping leading whitespace is the same as it was the last time
|
|
// - we're wrapping text and the available width is at least as big as our
|
|
// current frame width -or-
|
|
// we're not wrapping text and we're at the same column as before (this is
|
|
// an issue for preformatted tabbed text only)
|
|
// - AND we aren't justified (in which case the frame width has already been tweaked and can't be used)
|
|
if ((eReflowReason_Resize == aReflowState.reason) &&
|
|
(0 == (mState & NS_FRAME_IS_DIRTY))) {
|
|
|
|
nscoord realWidth = mRect.width;
|
|
if (mState & TEXT_TRIMMED_WS) {
|
|
// NOTE: Trailing whitespace includes word and letter spacing!
|
|
realWidth += ts.mSpaceWidth + ts.mWordSpacing + ts.mLetterSpacing;
|
|
}
|
|
if (!mNextInFlow &&
|
|
(mState & TEXT_OPTIMIZE_RESIZE) &&
|
|
!aMetrics.mComputeMEW &&
|
|
(lastTimeWeSkippedLeadingWS == skipWhitespace) &&
|
|
((wrapping && (maxWidth >= realWidth)) ||
|
|
(!wrapping && (prevColumn == column))) &&
|
|
#ifdef IBMBIDI
|
|
(0 == (mState & NS_FRAME_IS_BIDI) ) &&
|
|
#endif // IBMBIDI
|
|
!ts.mJustifying) {
|
|
// We can skip measuring of text and use the value from our
|
|
// previous reflow
|
|
measureText = PR_FALSE;
|
|
#ifdef NOISY_REFLOW
|
|
printf(" => measureText=%s wrapping=%s skipWhitespace=%s",
|
|
measureText ? "yes" : "no",
|
|
wrapping ? "yes" : "no",
|
|
skipWhitespace ? "yes" : "no");
|
|
printf(" realWidth=%d maxWidth=%d\n",
|
|
realWidth, maxWidth);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
// Local state passed to the routines that do the actual text measurement
|
|
TextReflowData textData(startingOffset, wrapping, skipWhitespace,
|
|
measureText, inWord, lineLayout.GetFirstLetterStyleOK(),
|
|
lineLayout.LineIsBreakable(), aMetrics.mComputeMEW,
|
|
PR_FALSE);
|
|
|
|
// Measure the text
|
|
// MeasureText may set TEXT_TRIMMED_WS flag, so don't clear after the call
|
|
if (ts.mFont->mSize)
|
|
aStatus = MeasureText(aPresContext, aReflowState, tx, lb, ts, textData);
|
|
else {
|
|
textData.mX = 0;
|
|
textData.mAscent = 0;
|
|
textData.mDescent = 0;
|
|
aStatus = NS_FRAME_COMPLETE;
|
|
}
|
|
if (textData.mTrailingSpaceTrimmed)
|
|
mState |= TEXT_TRIMMED_WS;
|
|
else
|
|
mState &= ~TEXT_TRIMMED_WS;
|
|
|
|
if (tx.HasMultibyte()) {
|
|
mState |= TEXT_HAS_MULTIBYTE;
|
|
}
|
|
|
|
// Setup metrics for caller; store final max-element-size information
|
|
aMetrics.width = textData.mX;
|
|
if ((0 == textData.mX) && !ts.mPreformatted) {
|
|
aMetrics.height = 0;
|
|
aMetrics.ascent = 0;
|
|
aMetrics.descent = 0;
|
|
}
|
|
else {
|
|
aMetrics.ascent = textData.mAscent;
|
|
aMetrics.descent = textData.mDescent;
|
|
aMetrics.height = aMetrics.ascent + aMetrics.descent;
|
|
}
|
|
mAscent = aMetrics.ascent;
|
|
if (!wrapping) {
|
|
textData.mMaxWordWidth = textData.mX;
|
|
}
|
|
if (aMetrics.mComputeMEW) {
|
|
aMetrics.mMaxElementWidth = textData.mMaxWordWidth;
|
|
}
|
|
|
|
// Set content offset and length
|
|
mContentOffset = startingOffset;
|
|
mContentLength = textData.mOffset - startingOffset;
|
|
|
|
// Compute space and letter counts for justification, if required
|
|
// Also use this one-shot path to compute the metrics needed for MathML, if required
|
|
// (the flag is set only if this text happens to be inside MathML)
|
|
PRBool calcMathMLMetrics = PR_FALSE;
|
|
nsAutoTextBuffer* textBufferPtr = nsnull;
|
|
#ifdef MOZ_MATHML
|
|
nsAutoTextBuffer textBuffer;
|
|
calcMathMLMetrics = (NS_REFLOW_CALC_BOUNDING_METRICS & aMetrics.mFlags) != 0;
|
|
if (calcMathMLMetrics) {
|
|
textBufferPtr = &textBuffer;
|
|
// always use the Unicode path with MathML fonts in gfx, it is safer this way
|
|
mState |= TEXT_HAS_MULTIBYTE;
|
|
}
|
|
#endif
|
|
if (ts.mJustifying || calcMathMLMetrics) {
|
|
PRIntn numJustifiableCharacter;
|
|
PRInt32 textLength;
|
|
|
|
// This will include a space for trailing whitespace, if any is present.
|
|
// This is corrected for in nsLineLayout::TrimWhiteSpaceIn.
|
|
|
|
// This work could be done in MeasureText, but it's complex to do accurately
|
|
// there because of the need to repair counts when wrapped words are backed out.
|
|
// So I do it via PrepareUnicodeText ... a little slower perhaps, but a lot saner,
|
|
// and it localizes the counting logic to one place.
|
|
PrepareUnicodeText(tx, nsnull, textBufferPtr, &textLength, PR_TRUE, &numJustifiableCharacter);
|
|
lineLayout.SetTextJustificationWeights(numJustifiableCharacter, textLength - numJustifiableCharacter);
|
|
|
|
#ifdef MOZ_MATHML
|
|
if (calcMathMLMetrics) {
|
|
SetFontFromStyle(aReflowState.rendContext, mStyleContext);
|
|
nsBoundingMetrics bm;
|
|
rv = aReflowState.rendContext->GetBoundingMetrics(textBuffer.mBuffer, textLength, bm);
|
|
if (NS_SUCCEEDED(rv))
|
|
aMetrics.mBoundingMetrics = bm;
|
|
else {
|
|
// Things didn't turn out well, just return the reflow metrics.
|
|
aMetrics.mBoundingMetrics.ascent = aMetrics.ascent;
|
|
aMetrics.mBoundingMetrics.descent = aMetrics.descent;
|
|
aMetrics.mBoundingMetrics.width = aMetrics.width;
|
|
aMetrics.mBoundingMetrics.rightBearing = aMetrics.width;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
nscoord maxFrameWidth = mRect.width;
|
|
nscoord maxFrameHeight = mRect.height;
|
|
|
|
// For future resize reflows we would like to avoid measuring the text.
|
|
// We can only do this if after this reflow we're:
|
|
// - complete. If we're not complete then our desired width doesn't
|
|
// represent our total size
|
|
// - we fit in the available space. We may be complete, but if we
|
|
// return a larger desired width than is available we may get pushed
|
|
// and our frame width won't get set
|
|
if (NS_FRAME_IS_COMPLETE(aStatus) && !NS_INLINE_IS_BREAK(aStatus) &&
|
|
(aMetrics.width <= maxWidth)) {
|
|
mState |= TEXT_OPTIMIZE_RESIZE;
|
|
mRect.width = aMetrics.width;
|
|
}
|
|
else {
|
|
mState &= ~TEXT_OPTIMIZE_RESIZE;
|
|
}
|
|
|
|
// If it's an incremental reflow command, then invalidate our existing
|
|
// bounds.
|
|
// XXX We need a finer granularity than this, but it isn't clear what
|
|
// has actually changed...
|
|
/*if (eReflowReason_Incremental == aReflowState.reason ||
|
|
eReflowReason_Dirty == aReflowState.reason) {*/
|
|
// XXX See bug 71523 We should really adjust the frames x coordinate to
|
|
// a pixel boundary to solve this.
|
|
// For now we add 1 pixel to the width of the invalidated rect.
|
|
// This fixes cases where the twips to pixel roundoff causes the invalidated
|
|
// rect's width to be one pixel short.
|
|
nscoord onePixel = aPresContext->IntScaledPixelsToTwips(1);
|
|
|
|
maxFrameWidth = PR_MAX(maxFrameWidth, mRect.width) + onePixel;
|
|
maxFrameHeight = PR_MAX(maxFrameHeight, mRect.height);
|
|
nsRect damage(0,0,maxFrameWidth,maxFrameHeight);
|
|
Invalidate(damage);
|
|
/*}*/
|
|
|
|
|
|
#ifdef NOISY_REFLOW
|
|
ListTag(stdout);
|
|
printf(": desiredSize=%d,%d(a=%d/d=%d) status=%x\n",
|
|
aMetrics.width, aMetrics.height, aMetrics.ascent, aMetrics.descent,
|
|
aStatus);
|
|
#endif
|
|
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aMetrics);
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::CanContinueTextRun(PRBool& aContinueTextRun) const
|
|
{
|
|
// We can continue a text run through a text frame
|
|
aContinueTextRun = PR_TRUE;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::AdjustFrameSize(nscoord aExtraSpace, nscoord& aUsedSpace)
|
|
{
|
|
aUsedSpace = 0;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::TrimTrailingWhiteSpace(nsPresContext* aPresContext,
|
|
nsIRenderingContext& aRC,
|
|
nscoord& aDeltaWidth,
|
|
PRBool& aLastCharIsJustifiable)
|
|
{
|
|
aLastCharIsJustifiable = PR_FALSE;
|
|
mState |= TEXT_IS_END_OF_LINE;
|
|
|
|
// in some situation (for instance, in wrapping mode, last space will not
|
|
// be added to total width if it exceed maxwidth), this flag will be set
|
|
// and we shouldn't trim non-added space
|
|
if (mState & TEXT_TRIMMED_WS) {
|
|
aDeltaWidth = 0;
|
|
return NS_OK;
|
|
}
|
|
|
|
nscoord dw = 0;
|
|
const nsStyleText* textStyle = GetStyleText();
|
|
if (mContentLength &&
|
|
(NS_STYLE_WHITESPACE_PRE != textStyle->mWhiteSpace) &&
|
|
(NS_STYLE_WHITESPACE_MOZ_PRE_WRAP != textStyle->mWhiteSpace)) {
|
|
|
|
// Get the text fragments that make up our content
|
|
nsCOMPtr<nsITextContent> tc = do_QueryInterface(mContent);
|
|
if (tc) {
|
|
const nsTextFragment* frag = tc->Text();
|
|
PRInt32 lastCharIndex = mContentOffset + mContentLength - 1;
|
|
if (lastCharIndex < frag->GetLength()) {
|
|
PRUnichar ch = frag->CharAt(lastCharIndex);
|
|
if (XP_IS_SPACE(ch)) {
|
|
// Get font metrics for a space so we can adjust the width by the
|
|
// right amount.
|
|
SetFontFromStyle(&aRC, mStyleContext);
|
|
|
|
aRC.GetWidth(' ', dw);
|
|
// NOTE: Trailing whitespace includes word and letter spacing!
|
|
nsStyleUnit unit;
|
|
unit = textStyle->mWordSpacing.GetUnit();
|
|
if (eStyleUnit_Coord == unit) {
|
|
dw += textStyle->mWordSpacing.GetCoordValue();
|
|
}
|
|
unit = textStyle->mLetterSpacing.GetUnit();
|
|
if (eStyleUnit_Coord == unit) {
|
|
dw += textStyle->mLetterSpacing.GetCoordValue();
|
|
}
|
|
aLastCharIsJustifiable = PR_TRUE;
|
|
} else if (IsJustifiableCharacter(ch, IsChineseJapaneseLangGroup())) {
|
|
aLastCharIsJustifiable = PR_TRUE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#ifdef NOISY_TRIM
|
|
ListTag(stdout);
|
|
printf(": trim => %d\n", dw);
|
|
#endif
|
|
if (0 != dw) {
|
|
mState |= TEXT_TRIMMED_WS;
|
|
}
|
|
else {
|
|
mState &= ~TEXT_TRIMMED_WS;
|
|
}
|
|
aDeltaWidth = dw;
|
|
return NS_OK;
|
|
}
|
|
|
|
static void
|
|
RevertSpacesToNBSP(PRUnichar* aBuffer, PRInt32 aWordLen)
|
|
{
|
|
PRUnichar* end = aBuffer + aWordLen;
|
|
for (; aBuffer < end; aBuffer++) {
|
|
PRUnichar ch = *aBuffer;
|
|
if (ch == ' ') {
|
|
*aBuffer = CH_NBSP;
|
|
}
|
|
}
|
|
}
|
|
|
|
nsTextDimensions
|
|
nsTextFrame::ComputeTotalWordDimensions(nsPresContext* aPresContext,
|
|
nsILineBreaker* aLineBreaker,
|
|
nsLineLayout& aLineLayout,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsIFrame* aNextFrame,
|
|
const nsTextDimensions& aBaseDimensions,
|
|
PRUnichar* aWordBuf,
|
|
PRUint32 aWordLen,
|
|
PRUint32 aWordBufSize,
|
|
PRBool aCanBreakBefore)
|
|
{
|
|
// Before we get going, convert any spaces in the current word back
|
|
// to nbsp's. This keeps the breaking logic happy.
|
|
RevertSpacesToNBSP(aWordBuf, (PRInt32) aWordLen);
|
|
|
|
nsTextDimensions addedDimensions;
|
|
PRUnichar *newWordBuf = aWordBuf;
|
|
PRUint32 newWordBufSize = aWordBufSize;
|
|
while (aNextFrame) {
|
|
nsIContent* content = aNextFrame->GetContent();
|
|
|
|
#ifdef DEBUG_WORD_WRAPPING
|
|
printf(" next textRun=");
|
|
nsFrame::ListTag(stdout, aNextFrame);
|
|
printf("\n");
|
|
#endif
|
|
|
|
nsCOMPtr<nsITextContent> tc(do_QueryInterface(content));
|
|
if (tc) {
|
|
PRInt32 moreSize = 0;
|
|
nsTextDimensions moreDimensions;
|
|
moreDimensions = ComputeWordFragmentDimensions(aPresContext,
|
|
aLineBreaker,
|
|
aLineLayout,
|
|
aReflowState,
|
|
aNextFrame, content, tc,
|
|
&moreSize,
|
|
newWordBuf,
|
|
aWordLen,
|
|
newWordBufSize,
|
|
aCanBreakBefore);
|
|
if (moreSize > 0) {
|
|
//Oh, wordBuf is too small, we have to grow it
|
|
newWordBufSize += moreSize;
|
|
if (newWordBuf != aWordBuf) {
|
|
newWordBuf = (PRUnichar*)nsMemory::Realloc(newWordBuf, sizeof(PRUnichar)*newWordBufSize);
|
|
NS_ASSERTION(newWordBuf, "not enough memory");
|
|
} else {
|
|
newWordBuf = (PRUnichar*)nsMemory::Alloc(sizeof(PRUnichar)*newWordBufSize);
|
|
NS_ASSERTION(newWordBuf, "not enough memory");
|
|
if(newWordBuf) {
|
|
memcpy((void*)newWordBuf, aWordBuf, sizeof(PRUnichar)*(newWordBufSize-moreSize));
|
|
}
|
|
}
|
|
|
|
if(newWordBuf) {
|
|
moreDimensions =
|
|
ComputeWordFragmentDimensions(aPresContext, aLineBreaker,
|
|
aLineLayout, aReflowState,
|
|
aNextFrame, content, tc, &moreSize,
|
|
newWordBuf, aWordLen, newWordBufSize,
|
|
aCanBreakBefore);
|
|
NS_ASSERTION((moreSize <= 0),
|
|
"ComputeWordFragmentDimensions is asking more buffer");
|
|
} else {
|
|
moreSize = -1;
|
|
moreDimensions.Clear();
|
|
}
|
|
}
|
|
|
|
addedDimensions.Combine(moreDimensions);
|
|
#ifdef DEBUG_WORD_WRAPPING
|
|
printf(" moreWidth=%d (addedWidth=%d) stop=%c\n", moreDimensions.width,
|
|
addedDimensions.width, stop?'T':'F');
|
|
#endif
|
|
if (moreSize == -1) {
|
|
goto done;
|
|
}
|
|
}
|
|
else {
|
|
// It claimed it was text but it doesn't implement the
|
|
// nsITextContent API. Therefore I don't know what to do with it
|
|
// and can't look inside it. Oh well.
|
|
goto done;
|
|
}
|
|
|
|
// Move on to the next frame in the text-run
|
|
aNextFrame = aLineLayout.FindNextText(aPresContext, aNextFrame);
|
|
}
|
|
|
|
done:;
|
|
#ifdef DEBUG_WORD_WRAPPING
|
|
printf(" total word width=%d\n", aBaseDimensions.width + addedDimensions.width);
|
|
#endif
|
|
if (newWordBuf && (newWordBuf != aWordBuf)) {
|
|
nsMemory::Free(newWordBuf);
|
|
}
|
|
addedDimensions.Combine(aBaseDimensions);
|
|
return addedDimensions;
|
|
}
|
|
|
|
nsTextDimensions
|
|
nsTextFrame::ComputeWordFragmentDimensions(nsPresContext* aPresContext,
|
|
nsILineBreaker* aLineBreaker,
|
|
nsLineLayout& aLineLayout,
|
|
const nsHTMLReflowState& aReflowState,
|
|
nsIFrame* aNextFrame,
|
|
nsIContent* aContent,
|
|
nsITextContent* aText,
|
|
PRInt32* aMoreSize,
|
|
const PRUnichar* aWordBuf,
|
|
PRUint32& aRunningWordLen,
|
|
PRUint32 aWordBufSize,
|
|
PRBool aCanBreakBefore)
|
|
{
|
|
nsTextTransformer tx(aLineBreaker, nsnull, aPresContext);
|
|
tx.Init(aNextFrame, aContent, 0);
|
|
PRBool isWhitespace, wasTransformed;
|
|
PRInt32 wordLen, contentLen;
|
|
nsTextDimensions dimensions;
|
|
#ifdef IBMBIDI
|
|
if (aNextFrame->GetStateBits() & NS_FRAME_IS_BIDI) {
|
|
PRInt32 nextFrameStart, nextFrameEnd;
|
|
aNextFrame->GetOffsets(nextFrameStart, nextFrameEnd);
|
|
wordLen = nextFrameEnd;
|
|
} else {
|
|
wordLen = -1;
|
|
}
|
|
#endif // IBMBIDI
|
|
*aMoreSize = 0;
|
|
PRUnichar* bp = tx.GetNextWord(PR_TRUE, &wordLen, &contentLen, &isWhitespace, &wasTransformed);
|
|
if (!bp) {
|
|
//empty text node, but we need to continue lookahead measurement
|
|
// AND we need to remember the text frame for later so that we don't
|
|
// bother doing the word look ahead.
|
|
aLineLayout.RecordWordFrame(aNextFrame);
|
|
return dimensions; // 0
|
|
}
|
|
|
|
if (isWhitespace) {
|
|
// Don't bother measuring nothing
|
|
*aMoreSize = -1; // flag that we should stop now
|
|
return dimensions; // 0
|
|
}
|
|
|
|
// We need to adjust the length by looking at the two pieces together. But if
|
|
// we have to grow aWordBuf, ask the caller to do it by returning the shortfall
|
|
if ((wordLen + aRunningWordLen) > aWordBufSize) {
|
|
*aMoreSize = wordLen + aRunningWordLen - aWordBufSize;
|
|
return dimensions; // 0
|
|
}
|
|
if (contentLen < tx.GetContentLength())
|
|
*aMoreSize = -1;
|
|
|
|
// Convert any spaces in the current word back to nbsp's. This keeps
|
|
// the breaking logic happy.
|
|
RevertSpacesToNBSP(bp, wordLen);
|
|
|
|
if (aCanBreakBefore) {
|
|
if(wordLen > 0)
|
|
{
|
|
memcpy((void*)&(aWordBuf[aRunningWordLen]), bp, sizeof(PRUnichar)*wordLen);
|
|
|
|
PRUint32 breakP=0;
|
|
PRBool needMore=PR_TRUE;
|
|
nsresult lres = aLineBreaker->Next(aWordBuf, aRunningWordLen+wordLen,
|
|
0, &breakP, &needMore);
|
|
if(NS_SUCCEEDED(lres))
|
|
{
|
|
// when we look at two pieces text together, we might decide to break
|
|
// eariler than if we only look at the 2nd pieces of text
|
|
if(!needMore && (breakP < (aRunningWordLen + wordLen)))
|
|
{
|
|
wordLen = breakP - aRunningWordLen;
|
|
if(wordLen < 0)
|
|
wordLen = 0;
|
|
*aMoreSize = -1;
|
|
}
|
|
}
|
|
|
|
// if we don't stop, we need to extend the buf so the next one can
|
|
// see this part otherwise, it does not matter since we will stop
|
|
// anyway
|
|
if (*aMoreSize != -1)
|
|
aRunningWordLen += wordLen;
|
|
}
|
|
}
|
|
else {
|
|
// Even if the previous text fragment is not breakable, the connected pieces
|
|
// can be breakable in between. This especially true for CJK.
|
|
PRBool canBreak;
|
|
nsresult lres = aLineBreaker->BreakInBetween(aWordBuf, aRunningWordLen, bp, wordLen, &canBreak);
|
|
if (NS_SUCCEEDED(lres) && canBreak) {
|
|
wordLen = 0;
|
|
*aMoreSize = -1;
|
|
}
|
|
}
|
|
|
|
if ((*aMoreSize == -1) && (wordLen == 0))
|
|
return dimensions; // 0;
|
|
|
|
nsStyleContext* sc = aNextFrame->GetStyleContext();
|
|
if (sc) {
|
|
// Measure the piece of text. Note that we have to select the
|
|
// appropriate font into the text first because the rendering
|
|
// context has our font in it, not the font that aText is using.
|
|
nsIRenderingContext& rc = *aReflowState.rendContext;
|
|
nsCOMPtr<nsIFontMetrics> oldfm;
|
|
rc.GetFontMetrics(*getter_AddRefs(oldfm));
|
|
|
|
TextStyle ts(aLineLayout.mPresContext, rc, sc);
|
|
if (ts.mSmallCaps) {
|
|
MeasureSmallCapsText(aReflowState, ts, bp, wordLen, PR_FALSE, &dimensions);
|
|
}
|
|
else {
|
|
rc.GetTextDimensions(bp, wordLen, dimensions);
|
|
// NOTE: Don't forget to add letter spacing for the word fragment!
|
|
dimensions.width += wordLen*ts.mLetterSpacing;
|
|
}
|
|
rc.SetFont(oldfm);
|
|
|
|
#ifdef DEBUG_WORD_WRAPPING
|
|
nsAutoString tmp(bp, wordLen);
|
|
printf(" fragment='");
|
|
fputs(NS_LossyConvertUCS2toASCII(tmp).get(), stdout);
|
|
printf("' width=%d [wordLen=%d contentLen=%d ContentLength=%d]\n",
|
|
dimensions.width, wordLen, contentLen, tx.GetContentLength());
|
|
#endif
|
|
|
|
// Remember the text frame for later so that we don't bother doing
|
|
// the word look ahead.
|
|
aLineLayout.RecordWordFrame(aNextFrame);
|
|
return dimensions;
|
|
}
|
|
|
|
*aMoreSize = -1;
|
|
return dimensions; // 0
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
// Translate the mapped content into a string that's printable
|
|
void
|
|
nsTextFrame::ToCString(nsString& aBuf, PRInt32* aTotalContentLength) const
|
|
{
|
|
// Get the frames text content
|
|
nsCOMPtr<nsITextContent> tc(do_QueryInterface(mContent));
|
|
if (!tc) {
|
|
return;
|
|
}
|
|
|
|
const nsTextFragment* frag = tc->Text();
|
|
|
|
// Compute the total length of the text content.
|
|
*aTotalContentLength = frag->GetLength();
|
|
|
|
// Set current fragment and current fragment offset
|
|
if (0 == mContentLength) {
|
|
return;
|
|
}
|
|
PRInt32 fragOffset = mContentOffset;
|
|
PRInt32 n = fragOffset + mContentLength;
|
|
while (fragOffset < n) {
|
|
PRUnichar ch = frag->CharAt(fragOffset++);
|
|
if (ch == '\r') {
|
|
aBuf.AppendLiteral("\\r");
|
|
} else if (ch == '\n') {
|
|
aBuf.AppendLiteral("\\n");
|
|
} else if (ch == '\t') {
|
|
aBuf.AppendLiteral("\\t");
|
|
} else if ((ch < ' ') || (ch >= 127)) {
|
|
aBuf.AppendLiteral("\\0");
|
|
aBuf.AppendInt((PRInt32)ch, 8);
|
|
} else {
|
|
aBuf.Append(ch);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
nsIAtom*
|
|
nsTextFrame::GetType() const
|
|
{
|
|
return nsLayoutAtoms::textFrame;
|
|
}
|
|
|
|
/* virtual */ PRBool
|
|
nsTextFrame::IsEmpty()
|
|
{
|
|
NS_ASSERTION(!(mState & TEXT_IS_ONLY_WHITESPACE) ||
|
|
!(mState & TEXT_ISNOT_ONLY_WHITESPACE),
|
|
"Invalid state");
|
|
|
|
// XXXldb Should this check compatibility mode as well???
|
|
if (GetStyleText()->WhiteSpaceIsSignificant()) {
|
|
return PR_FALSE;
|
|
}
|
|
|
|
if (mState & TEXT_ISNOT_ONLY_WHITESPACE) {
|
|
return PR_FALSE;
|
|
}
|
|
|
|
if (mState & TEXT_IS_ONLY_WHITESPACE) {
|
|
return PR_TRUE;
|
|
}
|
|
|
|
nsCOMPtr<nsITextContent> textContent( do_QueryInterface(mContent) );
|
|
if (! textContent) {
|
|
NS_NOTREACHED("text frame has no text content");
|
|
return PR_TRUE;
|
|
}
|
|
|
|
PRBool isEmpty = textContent->IsOnlyWhitespace();
|
|
mState |= (isEmpty ? TEXT_IS_ONLY_WHITESPACE : TEXT_ISNOT_ONLY_WHITESPACE);
|
|
return isEmpty;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
NS_IMETHODIMP
|
|
nsTextFrame::GetFrameName(nsAString& aResult) const
|
|
{
|
|
return MakeFrameName(NS_LITERAL_STRING("Text"), aResult);
|
|
}
|
|
|
|
NS_IMETHODIMP_(nsFrameState)
|
|
nsTextFrame::GetDebugStateBits() const
|
|
{
|
|
// mask out our emptystate flags; those are just caches
|
|
return nsFrame::GetDebugStateBits() &
|
|
~(TEXT_WHITESPACE_FLAGS | TEXT_REFLOW_FLAGS);
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsTextFrame::List(nsPresContext* aPresContext, FILE* out, PRInt32 aIndent) const
|
|
{
|
|
// Output the tag
|
|
IndentBy(out, aIndent);
|
|
ListTag(out);
|
|
#ifdef DEBUG_waterson
|
|
fprintf(out, " [parent=%p]", mParent);
|
|
#endif
|
|
if (HasView()) {
|
|
fprintf(out, " [view=%p]", NS_STATIC_CAST(void*, GetView()));
|
|
}
|
|
|
|
PRInt32 totalContentLength;
|
|
nsAutoString tmp;
|
|
ToCString(tmp, &totalContentLength);
|
|
|
|
// Output the first/last content offset and prev/next in flow info
|
|
PRBool isComplete = (mContentOffset + mContentLength) == totalContentLength;
|
|
fprintf(out, "[%d,%d,%c] ",
|
|
mContentOffset, mContentLength,
|
|
isComplete ? 'T':'F');
|
|
|
|
if (nsnull != mNextSibling) {
|
|
fprintf(out, " next=%p", NS_STATIC_CAST(void*, mNextSibling));
|
|
}
|
|
nsIFrame* prevInFlow = GetPrevInFlow();
|
|
if (nsnull != prevInFlow) {
|
|
fprintf(out, " prev-in-flow=%p", NS_STATIC_CAST(void*, prevInFlow));
|
|
}
|
|
if (nsnull != mNextInFlow) {
|
|
fprintf(out, " next-in-flow=%p", NS_STATIC_CAST(void*, mNextInFlow));
|
|
}
|
|
|
|
// Output the rect and state
|
|
fprintf(out, " {%d,%d,%d,%d}", mRect.x, mRect.y, mRect.width, mRect.height);
|
|
if (0 != mState) {
|
|
if (mState & NS_FRAME_SELECTED_CONTENT) {
|
|
fprintf(out, " [state=%08x] SELECTED", mState);
|
|
} else {
|
|
fprintf(out, " [state=%08x]", mState);
|
|
}
|
|
}
|
|
fprintf(out, " [content=%p]", NS_STATIC_CAST(void*, mContent));
|
|
fprintf(out, " sc=%p", NS_STATIC_CAST(void*, mStyleContext));
|
|
nsIAtom* pseudoTag = mStyleContext->GetPseudoType();
|
|
if (pseudoTag) {
|
|
nsAutoString atomString;
|
|
pseudoTag->ToString(atomString);
|
|
fprintf(out, " pst=%s",
|
|
NS_LossyConvertUCS2toASCII(atomString).get());
|
|
}
|
|
fputs("<\n", out);
|
|
|
|
// Output the text
|
|
aIndent++;
|
|
|
|
IndentBy(out, aIndent);
|
|
fputs("\"", out);
|
|
fputs(NS_LossyConvertUCS2toASCII(tmp).get(), out);
|
|
fputs("\"\n", out);
|
|
|
|
aIndent--;
|
|
IndentBy(out, aIndent);
|
|
fputs(">\n", out);
|
|
|
|
return NS_OK;
|
|
}
|
|
#endif
|
|
|
|
void nsTextFrame::AdjustSelectionPointsForBidi(SelectionDetails *sdptr,
|
|
PRInt32 textLength,
|
|
PRBool isRTLChars,
|
|
PRBool isOddLevel,
|
|
PRBool isBidiSystem)
|
|
{
|
|
/* This adjustment is required whenever the text has been reversed by
|
|
* Mozilla before rendering.
|
|
*
|
|
* In theory this means any text whose Bidi embedding level has been
|
|
* set by the Unicode Bidi algorithm to an odd value, but this is
|
|
* only true in practice on a non-Bidi platform.
|
|
*
|
|
* On a Bidi platform the situation is more complicated because the
|
|
* platform will automatically reverse right-to-left characters; so
|
|
* Mozilla reverses text whose natural directionality is the opposite
|
|
* of its embedding level: right-to-left characters whose Bidi
|
|
* embedding level is even (e.g. Visual Hebrew) or left-to-right and
|
|
* neutral characters whose Bidi embedding level is odd (e.g. English
|
|
* text with <bdo dir="rtl">).
|
|
*
|
|
* The following condition is accordingly an optimization of
|
|
* if ( (!isBidiSystem && isOddLevel) ||
|
|
* (isBidiSystem &&
|
|
* ((isRTLChars && !isOddLevel) ||
|
|
* (!isRTLChars && isOddLevel))))
|
|
*/
|
|
if (isOddLevel ^ (isRTLChars && isBidiSystem)) {
|
|
|
|
PRInt32 swap = sdptr->mStart;
|
|
sdptr->mStart = textLength - sdptr->mEnd;
|
|
sdptr->mEnd = textLength - swap;
|
|
|
|
// temp fix for 75026 crasher untill we fix the bidi code
|
|
// the above bidi code cause mStart < 0 in some case
|
|
// the problem is we have whitespace compression code in
|
|
// nsTextTransformer which cause mEnd > textLength
|
|
NS_ASSERTION((sdptr->mStart >= 0) , "mStart >= 0");
|
|
if(sdptr->mStart < 0 )
|
|
sdptr->mStart = 0;
|
|
|
|
NS_ASSERTION((sdptr->mEnd >= 0) , "mEnd >= 0");
|
|
if(sdptr->mEnd < 0 )
|
|
sdptr->mEnd = 0;
|
|
|
|
NS_ASSERTION((sdptr->mStart <= sdptr->mEnd), "mStart <= mEnd");
|
|
if(sdptr->mStart > sdptr->mEnd)
|
|
sdptr->mEnd = sdptr->mStart;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
void
|
|
nsTextFrame::AdjustOffsetsForBidi(PRInt32 aStart, PRInt32 aEnd)
|
|
{
|
|
AddStateBits(NS_FRAME_IS_BIDI);
|
|
SetOffsets(aStart, aEnd);
|
|
}
|
|
|
|
void
|
|
nsTextFrame::SetOffsets(PRInt32 aStart, PRInt32 aEnd)
|
|
{
|
|
mContentOffset = aStart;
|
|
mContentLength = aEnd - aStart;
|
|
}
|