mirror of
https://github.com/mozilla/gecko-dev.git
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1032 lines
32 KiB
C++
1032 lines
32 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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* IBM Corporation
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*/
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#ifdef IBMBIDI
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#define FIX_FOR_BUG_40882
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#include "nsBidiPresUtils.h"
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#include "nsITextContent.h"
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#include "nsTextFragment.h"
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#include "nsLayoutAtoms.h"
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#include "nsIPresContext.h"
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#include "nsIRenderingContext.h"
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#include "nsIServiceManager.h"
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#include "nsIFrameManager.h"
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#include "nsBidiFrames.h"
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#include "nsITextFrame.h"
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#include "nsIUBidiUtils.h"
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static const PRUnichar kSpace = 0x0020;
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static const PRUnichar kLineSeparator = 0x2028;
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static const PRUnichar kObjectSubstitute = 0xFFFC;
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static const PRUnichar kLRE = 0x202A;
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static const PRUnichar kRLE = 0x202B;
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static const PRUnichar kPDF = 0x202C;
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#ifdef FIX_FOR_BUG_40882
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static const PRUnichar ALEF = 0x05D0;
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#endif
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extern nsresult
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NS_NewContinuingTextFrame(nsIPresShell* aPresShell, nsIFrame** aResult);
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extern nsresult
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NS_NewDirectionalFrame(nsIFrame** aNewFrame, PRUnichar aChar);
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nsBidiPresUtils::nsBidiPresUtils() : mSuccess(NS_ERROR_FAILURE),
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mBidiEngine(nsnull),
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mUnicodeUtils(nsnull),
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mArraySize(8),
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mIndexMap(nsnull),
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mLevels(nsnull)
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{
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nsCOMPtr<nsIBidi> bidiEngine = do_GetService("@mozilla.org/intl/bidi;1");
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if (bidiEngine) {
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mBidiEngine = bidiEngine;
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mSuccess = NS_OK;
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}
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}
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nsBidiPresUtils::~nsBidiPresUtils()
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{
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if (mLevels) {
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delete[] mLevels;
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}
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if (mIndexMap) {
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delete[] mIndexMap;
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}
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}
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PRBool
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nsBidiPresUtils::IsSuccessful() const
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{
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return NS_SUCCEEDED(mSuccess);
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}
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/* Some helper methods for Resolve() */
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static nsresult
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CreateBidiContinuation(nsIPresContext* aPresContext,
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nsIContent* aContent,
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nsIFrame* aFrame,
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nsIFrame** aNewFrame)
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{
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NS_PRECONDITION(aNewFrame, "null OUT ptr");
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*aNewFrame = nsnull;
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NS_PRECONDITION(aFrame, "null ptr");
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nsIFrame* parent;
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nsCOMPtr<nsIPresShell> presShell;
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aPresContext->GetShell(getter_AddRefs(presShell) );
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NS_ASSERTION(presShell, "PresShell must be set on PresContext before calling nsBidiPresUtils::CreateBidiContinuation");
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NS_NewContinuingTextFrame(presShell, aNewFrame);
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if (!(*aNewFrame) ) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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nsCOMPtr<nsIStyleContext> styleContext;
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aFrame->GetStyleContext(getter_AddRefs(styleContext) );
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NS_ASSERTION(presShell, "Frame has no styleContext in nsBidiPresUtils::CreateBidiContinuation");
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aFrame->GetParent(&parent);
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NS_ASSERTION(presShell, "Couldn't get frame parent in nsBidiPresUtils::CreateBidiContinuation");
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(*aNewFrame)->Init(aPresContext, aContent, parent, styleContext, nsnull);
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// XXX: TODO: Instead, create and insert entire frame list
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(*aNewFrame)->SetNextSibling(nsnull);
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// The list name nsLayoutAtoms::nextBidi would indicate we don't want reflow
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parent->InsertFrames(aPresContext, *presShell, nsLayoutAtoms::nextBidi,
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aFrame, *aNewFrame);
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return NS_OK;
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}
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static void
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AdjustEmbeddingLevel(nsIFrame* aFrame,
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PRUint8& aEmbeddingLevel)
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{
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const nsStyleText* text;
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aFrame->GetStyleData(eStyleStruct_Text, (const nsStyleStruct*&) text);
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NS_ASSERTION(text, "Couldn't get text StyleData in nsBidiPresUtils::AdjustEmbeddingLevel");
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if (NS_STYLE_UNICODE_BIDI_OVERRIDE == text->mUnicodeBidi) {
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const nsStyleDisplay* display;
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aFrame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&) display);
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NS_ASSERTION(text, "Couldn't get display StyleData in nsBidiPresUtils::AdjustEmbeddingLevel");
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if (NS_STYLE_DIRECTION_RTL == display->mDirection) {
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// ensure embedding level is odd
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aEmbeddingLevel = (aEmbeddingLevel - 1) | 0x01;
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}
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else { // if (NS_STYLE_DIRECTION_LTR == display->mDirection)
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// ensure embedding level is even
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aEmbeddingLevel &= ~0x01;
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}
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}
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}
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/*************************************/
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nsresult
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nsBidiPresUtils::Resolve(nsIPresContext* aPresContext,
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nsIFrame* aBlockFrame,
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nsIFrame* aFirstChild,
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PRBool& aForceReflow)
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{
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aForceReflow = PR_FALSE;
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mLogicalFrames.Clear();
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mSuccess = InitLogicalArray(aPresContext, aFirstChild, nsnull, PR_TRUE);
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if (NS_FAILED(mSuccess) ) {
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return mSuccess;
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}
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CreateBlockBuffer(aPresContext);
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PRInt32 bufferLength = mBuffer.Length();
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if (bufferLength < 1) {
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mSuccess = NS_OK;
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return mSuccess;
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}
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const nsStyleDisplay* display;
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aBlockFrame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&) display);
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PRInt32 runCount;
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PRUint8 embeddingLevel;
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nsBidiLevel paraLevel = embeddingLevel =
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(NS_STYLE_DIRECTION_RTL == display->mDirection)
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? NSBIDI_RTL : NSBIDI_LTR;
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mSuccess = mBidiEngine->SetPara(mBuffer.GetUnicode(), bufferLength, paraLevel, nsnull);
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if (NS_FAILED(mSuccess) ) {
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return mSuccess;
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}
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PRBool isVisual;
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aPresContext->IsVisualMode(isVisual);
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mSuccess = mBidiEngine->CountRuns(&runCount);
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if (NS_FAILED(mSuccess) ) {
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return mSuccess;
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}
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PRInt32 runLength = 0;
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PRInt32 fragmentLength = 0;
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PRInt32 temp;
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PRInt32 frameIndex = -1;
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PRInt32 frameCount = mLogicalFrames.Count();
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PRInt32 contentOffset; // offset within current frame
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PRInt32 lineOffset = 0; // offset within mBuffer
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PRInt32 logicalLimit = 0;
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PRInt32 numRun = -1;
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PRUint8 charType;
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PRUint8 prevType = eCharType_LeftToRight;
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PRBool isTextFrame;
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nsIFrame* frame = nsnull;
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nsIFrame* nextBidi;
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nsITextFrame* textFrame;
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nsCOMPtr<nsIAtom> frameType;
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nsCOMPtr<nsIContent> content;
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nsCOMPtr<nsITextContent> textContent;
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const nsTextFragment* fragment;
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for (; ;) {
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textFrame = nsnull;
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if (fragmentLength <= 0) {
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if (++frameIndex >= frameCount) {
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break;
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}
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contentOffset = 0;
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frame = (nsIFrame*) (mLogicalFrames[frameIndex]);
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frame->GetFrameType(getter_AddRefs(frameType) );
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if (nsLayoutAtoms::textFrame == frameType.get() ) {
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mSuccess = frame->GetContent(getter_AddRefs(content) );
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if (NS_FAILED(mSuccess) || (!content) ) {
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break;
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}
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textContent = do_QueryInterface(content, &mSuccess);
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if (NS_FAILED(mSuccess) || (!textContent) ) {
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break;
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}
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textContent->GetText(&fragment);
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if (!fragment) {
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mSuccess = NS_ERROR_FAILURE;
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break;
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}
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fragmentLength = fragment->GetLength();
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isTextFrame = PR_TRUE;
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} // if text frame
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else {
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isTextFrame = PR_FALSE;
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fragmentLength = 1;
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}
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} // if (fragmentLength <= 0)
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if (runLength <= 0) {
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if (++numRun >= runCount) {
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break;
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}
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lineOffset = logicalLimit;
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if (NS_FAILED(mBidiEngine->GetLogicalRun(
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lineOffset, &logicalLimit, &embeddingLevel) ) ) {
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break;
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}
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runLength = logicalLimit - lineOffset;
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if (isVisual) {
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embeddingLevel = paraLevel;
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}
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} // if (runLength <= 0)
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if (nsLayoutAtoms::directionalFrame == frameType.get()) {
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delete frame;
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++lineOffset;
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}
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else {
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AdjustEmbeddingLevel(frame, embeddingLevel);
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frame->SetBidiProperty(aPresContext, nsLayoutAtoms::embeddingLevel,
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(void *)embeddingLevel);
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frame->SetBidiProperty(aPresContext, nsLayoutAtoms::baseLevel,
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(void *)paraLevel);
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if (isTextFrame) {
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PRInt32 limit = PR_MIN(logicalLimit, lineOffset + fragmentLength);
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CalculateCharType(limit, lineOffset, charType, prevType);
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// IBMBIDI - Egypt - Start
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frame->SetBidiProperty(aPresContext,nsLayoutAtoms::charType,(void*)charType);
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// IBMBIDI - Egypt - End
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if ( (runLength > 0) && (runLength < fragmentLength) ) {
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if (!EnsureBidiContinuation(aPresContext, content.get(), frame,
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&nextBidi, frameIndex) ) {
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break;
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}
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frame->QueryInterface(NS_GET_IID(nsITextFrame), (void**) &textFrame);
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if (textFrame) {
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textFrame->SetOffsets(contentOffset, contentOffset + runLength);
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nsFrameState frameState;
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frame->GetFrameState(&frameState);
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frameState |= NS_FRAME_IS_BIDI;
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frame->SetFrameState(frameState);
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}
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frame = nextBidi;
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contentOffset += runLength;
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} // if (runLength < fragmentLength)
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else {
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frame->QueryInterface(NS_GET_IID(nsITextFrame), (void**) &textFrame);
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if (textFrame) {
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textFrame->SetOffsets(contentOffset, contentOffset + fragmentLength);
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nsFrameState frameState;
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frame->GetFrameState(&frameState);
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frameState |= NS_FRAME_IS_BIDI;
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frame->SetFrameState(frameState);
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}
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frame->GetBidiProperty(aPresContext, nsLayoutAtoms::nextBidi,
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(void**) &nextBidi);
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if (RemoveBidiContinuation(aPresContext, frame, nextBidi,
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content.get(), frameIndex, temp) ) {
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aForceReflow = PR_TRUE;
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runLength -= temp;
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lineOffset += temp;
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}
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}
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} // isTextFrame
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else {
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++lineOffset;
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}
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} // not directionalFrame
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temp = runLength;
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runLength -= fragmentLength;
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fragmentLength -= temp;
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} // for
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return mSuccess;
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}
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nsresult
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nsBidiPresUtils::InitLogicalArray(nsIPresContext* aPresContext,
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nsIFrame* aCurrentFrame,
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nsIFrame* aNextInFlow,
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PRBool aAddMarkers)
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{
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nsIFrame* frame;
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nsIFrame* directionalFrame;
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nsIFrame* kid;
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nsCOMPtr<nsIAtom> frameType;
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const nsStyleDisplay* display;
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nsresult rv;
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nsresult res = NS_OK;
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for (frame = aCurrentFrame;
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frame && frame != aNextInFlow;
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frame->GetNextSibling(&frame) ) {
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rv = NS_ERROR_FAILURE;
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frame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&) display);
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if ( (aAddMarkers) && (!display->IsBlockLevel() ) ) {
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// Example: <bdo dir=ltr>latin HEBREW</bdo>
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// should be displayed as is: latin HEBREW
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// The entire text frame receives even EL and whouldn't "normally" be split.
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// Then, if the platform is Bidi, it reverses hebrew characters, which results in
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// incorrect text order: latin WERBEH
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// To avoid that, we always insert LRE/RLE. That forces splitting the frame into
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// uni-directional (from the platform point of view) pieces - with even EL for
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// "latin" and odd EL for "HEBREW". Unicode override, if any, will be taken into
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// account in AdjustEmbeddingLevel(). Correct text order on a bidi platform will
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// be ensured by nsBidiPresUtils::FormatUnicodeText (which would reverse "HEBREW"
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// due to inconsistency between its Bidi category (U_RIGHT_TO_LEFT) and the
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// parity of its EL (even).
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if (NS_STYLE_DIRECTION_RTL == display->mExplicitDirection) {
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rv = NS_NewDirectionalFrame(&directionalFrame, kRLE);
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}
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else if (NS_STYLE_DIRECTION_LTR == display->mExplicitDirection) {
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rv = NS_NewDirectionalFrame(&directionalFrame, kLRE);
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}
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if (NS_SUCCEEDED(rv) ) {
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mLogicalFrames.AppendElement(directionalFrame);
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}
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} // if (aAddMarkers)
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frame->GetFrameType(getter_AddRefs(frameType) );
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if ( (!display->IsBlockLevel() )
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&& ( (nsLayoutAtoms::inlineFrame == frameType.get() )
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|| (nsLayoutAtoms::letterFrame == frameType.get() )
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|| (nsLayoutAtoms::blockFrame == frameType.get() ) ) ) {
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frame->FirstChild(aPresContext, nsnull, &kid);
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res = InitLogicalArray(aPresContext, kid, aNextInFlow, aAddMarkers);
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}
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else { // bidi leaf
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mLogicalFrames.AppendElement(frame);
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}
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// If the element is attributed by dir, indicate direction pop (add PDF frame)
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if (NS_SUCCEEDED(rv) ) {
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rv = NS_NewDirectionalFrame(&directionalFrame, kPDF);
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if (NS_SUCCEEDED(rv) ) {
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mLogicalFrames.AppendElement(directionalFrame);
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}
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}
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} // for
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return res;
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}
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void
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nsBidiPresUtils::CreateBlockBuffer(nsIPresContext* aPresContext)
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{
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mBuffer.SetLength(0);
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nsIFrame* frame;
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nsIContent* prevContent = nsnull;
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nsCOMPtr<nsIContent> content;
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nsCOMPtr<nsITextContent> textContent;
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nsCOMPtr<nsIAtom> frameType;
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const nsTextFragment* frag;
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PRUint32 i;
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PRUint32 count = mLogicalFrames.Count();
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for (i = 0; i < count; i++) {
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frame = (nsIFrame*) (mLogicalFrames[i]);
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frame->GetFrameType(getter_AddRefs(frameType) );
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if (nsLayoutAtoms::textFrame == frameType.get() ) {
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mSuccess = frame->GetContent(getter_AddRefs(content) );
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if ( (NS_FAILED(mSuccess) ) || (!content) ) {
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break;
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}
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if (content.get() == prevContent) {
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continue;
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}
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prevContent = content.get();
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textContent = do_QueryInterface(content, &mSuccess);
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if ( (NS_FAILED(mSuccess) ) || (!textContent) ) {
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break;
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}
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textContent->GetText(&frag);
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if (!frag) {
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mSuccess = NS_ERROR_FAILURE;
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break;
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}
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frag->AppendTo(mBuffer);
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}
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else if (nsLayoutAtoms::brFrame == frameType.get() ) { // break frame
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// Append line separator
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mBuffer.Append( (PRUnichar) kLineSeparator);
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}
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else if (nsLayoutAtoms::directionalFrame == frameType.get() ) {
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nsDirectionalFrame* dirFrame;
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frame->QueryInterface(NS_GET_IID(nsDirectionalFrame),
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(void**) &dirFrame);
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mBuffer.Append(dirFrame->GetChar() );
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}
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else { // not text frame
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// See the Unicode Bidi Algorithm:
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// "...inline objects (such as graphics) are treated as if they are ... U+FFFC"
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mBuffer.Append( (PRUnichar) kObjectSubstitute);
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}
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}
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// XXX: TODO: Handle preformatted text ('\n')
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mBuffer.ReplaceChar("\t\r\n", kSpace);
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}
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|
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void
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nsBidiPresUtils::ReorderFrames(nsIPresContext* aPresContext,
|
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nsIRenderingContext* aRendContext,
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nsIFrame* aFirstChild,
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nsIFrame* aNextInFlow,
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PRInt32 aChildCount)
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{
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mLogicalFrames.Clear();
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if (NS_SUCCEEDED(InitLogicalArray(aPresContext, aFirstChild, aNextInFlow))
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&& (mLogicalFrames.Count() > 1)) {
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PRBool bidiEnabled;
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// Set bidiEnabled to true if the line is reordered
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Reorder(aPresContext, bidiEnabled);
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if (bidiEnabled) {
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RepositionInlineFrames(aPresContext, aRendContext, aFirstChild, aChildCount);
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}
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}
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}
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nsresult
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nsBidiPresUtils::Reorder(nsIPresContext* aPresContext,
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PRBool& aBidiEnabled)
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{
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aBidiEnabled = PR_FALSE;
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PRInt32 count = mLogicalFrames.Count();
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if (mArraySize < count) {
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mArraySize = count << 1;
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if (mLevels) {
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delete[] mLevels;
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mLevels = nsnull;
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}
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if (mIndexMap) {
|
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delete[] mIndexMap;
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mIndexMap = nsnull;
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}
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}
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|
if (!mLevels) {
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mLevels = new PRUint8[mArraySize];
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if (!mLevels) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
|
|
}
|
|
nsCRT::zero(mLevels, sizeof(PRUint8) * mArraySize);
|
|
|
|
nsIFrame* frame;
|
|
PRInt32 i;
|
|
|
|
for (i = 0; i < count; i++) {
|
|
frame = (nsIFrame*) (mLogicalFrames[i]);
|
|
frame->GetBidiProperty(aPresContext, nsLayoutAtoms::embeddingLevel,
|
|
(void**)&mLevels[i], sizeof(PRUint8) );
|
|
}
|
|
if (!mIndexMap) {
|
|
mIndexMap = new PRInt32[mArraySize];
|
|
}
|
|
if (!mIndexMap) {
|
|
mSuccess = NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
else {
|
|
nsCRT::zero(mIndexMap, sizeof(PRUint32) * mArraySize);
|
|
|
|
mSuccess = mBidiEngine->ReorderVisual(mLevels, count, mIndexMap);
|
|
|
|
if (NS_SUCCEEDED(mSuccess) ) {
|
|
mVisualFrames.Clear();
|
|
|
|
for (i = 0; i < count; i++) {
|
|
mVisualFrames.ReplaceElementAt(mLogicalFrames[mIndexMap[i]], i);
|
|
if (i != mIndexMap[i]) {
|
|
aBidiEnabled = PR_TRUE;
|
|
}
|
|
}
|
|
} // NS_SUCCEEDED(mSuccess)
|
|
} // indexMap
|
|
|
|
if (NS_FAILED(mSuccess) ) {
|
|
aBidiEnabled = PR_FALSE;
|
|
}
|
|
return mSuccess;
|
|
}
|
|
|
|
void
|
|
nsBidiPresUtils::RepositionInlineFrames(nsIPresContext* aPresContext,
|
|
nsIRenderingContext* aRendContext,
|
|
nsIFrame* aFirstChild,
|
|
PRInt32 aChildCount) const
|
|
{
|
|
PRInt32 count = mVisualFrames.Count();
|
|
if (count < 2) {
|
|
return;
|
|
}
|
|
nsIFrame* frame = (nsIFrame*) (mVisualFrames[0]);
|
|
nsPoint origin;
|
|
nsRect rect;
|
|
PRInt32 i;
|
|
|
|
#ifdef FIX_FOR_BUG_40882
|
|
PRInt32 ch;
|
|
PRInt32 charType;
|
|
nscoord width, dWidth, alefWidth = 0, dx = 0;
|
|
PRUnichar buf[2] = {ALEF, 0x0000};
|
|
|
|
PRBool isBidiSystem;
|
|
PRUint32 hints = 0;
|
|
aRendContext->GetHints(hints);
|
|
isBidiSystem = (hints & NS_RENDERING_HINT_BIDI_REORDERING);
|
|
#endif // bug
|
|
|
|
frame->GetRect(rect);
|
|
|
|
if (frame != aFirstChild) {
|
|
aFirstChild->GetOrigin(origin);
|
|
rect.x = origin.x;
|
|
frame->MoveTo(aPresContext, rect.x, rect.y);
|
|
}
|
|
|
|
for (i = 1; i < count; i++) {
|
|
|
|
#ifdef FIX_FOR_BUG_40882
|
|
ch = 0;
|
|
( (nsIFrame*)mVisualFrames[i])->GetBidiProperty(aPresContext,
|
|
nsLayoutAtoms::charType, (void**)&charType);
|
|
if (CHARTYPE_IS_RTL(charType) ) {
|
|
frame->GetBidiProperty(aPresContext,
|
|
nsLayoutAtoms::endsInDiacritic, (void**)&ch);
|
|
if (ch) {
|
|
if (!alefWidth) {
|
|
aRendContext->GetWidth(buf, 1, alefWidth, nsnull);
|
|
}
|
|
dWidth = 0;
|
|
if (isBidiSystem) {
|
|
buf[1] = (PRUnichar) ch;
|
|
aRendContext->GetWidth(buf, 2, width, nsnull);
|
|
dWidth = width - alefWidth;
|
|
}
|
|
if (dWidth <= 0) {
|
|
frame->MoveTo(aPresContext, rect.x + (nscoord)((float)width/8), rect.y);
|
|
}
|
|
}
|
|
}
|
|
#endif // bug
|
|
frame = (nsIFrame*) (mVisualFrames[i]);
|
|
frame->GetOrigin(origin);
|
|
frame->MoveTo(aPresContext, rect.x + rect.width, origin.y);
|
|
#ifdef FIX_FOR_BUG_40882
|
|
if (ch) {
|
|
dx += (rect.width - dWidth);
|
|
frame->MoveTo(aPresContext, rect.x + dWidth, origin.y);
|
|
}
|
|
#endif // bug 40882
|
|
frame->GetRect(rect);
|
|
} // for
|
|
|
|
#ifdef FIX_FOR_BUG_40882
|
|
if (dx > 0) {
|
|
PRInt32 alignRight;
|
|
frame->GetBidiProperty(aPresContext, nsLayoutAtoms::baseLevel,
|
|
(void**) &alignRight);
|
|
if (0 == (alignRight & 1) ) {
|
|
const nsStyleText* styleText;
|
|
frame->GetStyleData(eStyleStruct_Text, (const nsStyleStruct*&) styleText);
|
|
|
|
if (NS_STYLE_TEXT_ALIGN_RIGHT == styleText->mTextAlign
|
|
|| NS_STYLE_TEXT_ALIGN_MOZ_RIGHT == styleText->mTextAlign) {
|
|
alignRight = 1;
|
|
}
|
|
}
|
|
if (alignRight & 1) {
|
|
for (i = 0; i < count; i++) {
|
|
frame = (nsIFrame*) (mVisualFrames[i]);
|
|
frame->GetOrigin(origin);
|
|
frame->MoveTo(aPresContext, origin.x + dx, origin.y);
|
|
}
|
|
}
|
|
}
|
|
#endif // bug
|
|
|
|
// Now adjust inline container frames.
|
|
// Example: LTR paragraph
|
|
// <p><b>english HEBREW</b> 123</p>
|
|
// should be displayed as
|
|
// <p><b>english </b>123 <b>WERBEH</b></p>
|
|
|
|
// We assume that <b></b> rectangle takes all the room from "english" left edge to
|
|
// "WERBEH" right edge.
|
|
|
|
nsCOMPtr<nsIAtom> frameType;
|
|
|
|
frame = aFirstChild;
|
|
for (i = 0; i < aChildCount; i++) {
|
|
frame->GetFrameType(getter_AddRefs(frameType) );
|
|
if ( frameType.get()
|
|
&& ( (nsLayoutAtoms::inlineFrame == frameType.get() )
|
|
|| (nsLayoutAtoms::letterFrame == frameType.get() )
|
|
|| (nsLayoutAtoms::blockFrame == frameType.get() ) ) ) {
|
|
PRInt32 minX = 0x7FFFFFFF;
|
|
PRInt32 maxX = 0;
|
|
RepositionContainerFrame(aPresContext, frame, minX, maxX);
|
|
}
|
|
frame->GetNextSibling(&frame);
|
|
} // for
|
|
}
|
|
|
|
void
|
|
nsBidiPresUtils::RepositionContainerFrame(nsIPresContext* aPresContext,
|
|
nsIFrame* aContainer,
|
|
PRInt32& aMinX,
|
|
PRInt32& aMaxX) const
|
|
{
|
|
nsIFrame* frame;
|
|
nsIFrame* firstChild;
|
|
nsCOMPtr<nsIAtom> frameType;
|
|
nsRect rect;
|
|
PRInt32 minX = 0x7FFFFFFF;
|
|
PRInt32 maxX = 0;
|
|
|
|
aContainer->FirstChild(aPresContext, nsnull, &firstChild);
|
|
|
|
for (frame = firstChild; frame; frame->GetNextSibling(&frame) ) {
|
|
frame->GetFrameType(getter_AddRefs(frameType) );
|
|
if ( (frameType.get() )
|
|
&& ( (nsLayoutAtoms::inlineFrame == frameType.get() )
|
|
|| (nsLayoutAtoms::letterFrame == frameType.get() )
|
|
|| (nsLayoutAtoms::blockFrame == frameType.get() ) ) ) {
|
|
RepositionContainerFrame(aPresContext, frame, minX, maxX);
|
|
}
|
|
else {
|
|
frame->GetRect(rect);
|
|
minX = PR_MIN(minX, rect.x);
|
|
maxX = PR_MAX(maxX, rect.x + rect.width);
|
|
}
|
|
}
|
|
|
|
aMinX = PR_MIN(minX, aMinX);
|
|
aMaxX = PR_MAX(maxX, aMaxX);
|
|
|
|
if (minX < maxX) {
|
|
aContainer->GetRect(rect);
|
|
rect.x = minX;
|
|
rect.width = maxX - minX;
|
|
aContainer->SetRect(aPresContext, rect);
|
|
}
|
|
|
|
// Now adjust all the kids (kid's coordinates are relative to the parent's)
|
|
nsPoint origin;
|
|
|
|
for (frame = firstChild; frame; frame->GetNextSibling(&frame) ) {
|
|
frame->GetOrigin(origin);
|
|
frame->MoveTo(aPresContext, origin.x - minX, origin.y);
|
|
}
|
|
}
|
|
|
|
PRBool
|
|
nsBidiPresUtils::EnsureBidiContinuation(nsIPresContext* aPresContext,
|
|
nsIContent* aContent,
|
|
nsIFrame* aFrame,
|
|
nsIFrame** aNewFrame,
|
|
PRInt32& aFrameIndex)
|
|
{
|
|
NS_PRECONDITION(aNewFrame, "null OUT ptr");
|
|
if (!aNewFrame) {
|
|
return PR_FALSE;
|
|
}
|
|
*aNewFrame = nsnull;
|
|
|
|
if (!aFrame) {
|
|
return PR_FALSE;
|
|
}
|
|
if (aFrameIndex + 1 < mLogicalFrames.Count() ) {
|
|
nsIFrame* frame = (nsIFrame*)mLogicalFrames[aFrameIndex + 1];
|
|
nsCOMPtr<nsIContent> content;
|
|
|
|
nsresult rv = frame->GetContent(getter_AddRefs(content) );
|
|
|
|
if (NS_SUCCEEDED(rv) && (content.get() == aContent) ) {
|
|
*aNewFrame = frame;
|
|
++aFrameIndex;
|
|
aFrame->SetNextInFlow(nsnull);
|
|
frame->SetPrevInFlow(nsnull);
|
|
}
|
|
}
|
|
if (nsnull == *aNewFrame) {
|
|
mSuccess = CreateBidiContinuation(aPresContext, aContent, aFrame, aNewFrame);
|
|
if (NS_FAILED(mSuccess) ) {
|
|
return PR_FALSE;
|
|
}
|
|
}
|
|
aFrame->SetBidiProperty(aPresContext, nsLayoutAtoms::nextBidi,
|
|
(void*) *aNewFrame);
|
|
return PR_TRUE;
|
|
}
|
|
|
|
PRBool
|
|
nsBidiPresUtils::RemoveBidiContinuation(nsIPresContext* aPresContext,
|
|
nsIFrame* aFrame,
|
|
nsIFrame* aNextFrame,
|
|
nsIContent* aContent,
|
|
PRInt32& aFrameIndex,
|
|
PRInt32& aOffset) const
|
|
{
|
|
if (!aFrame) {
|
|
return PR_FALSE;
|
|
}
|
|
nsCOMPtr<nsIContent> content;
|
|
nsCOMPtr<nsIAtom> frameType;
|
|
nsIFrame* frame;
|
|
PRInt32 index;
|
|
PRInt32 newIndex = -1;
|
|
PRInt32 frameCount = mLogicalFrames.Count();
|
|
|
|
for (index = aFrameIndex + 1; index < frameCount; index++) {
|
|
// frames with the same content may not be adjacent. So check all frames.
|
|
frame = (nsIFrame*) mLogicalFrames[index];
|
|
frame->GetContent(getter_AddRefs(content) );
|
|
if (content.get() == aContent) {
|
|
newIndex = index;
|
|
}
|
|
}
|
|
if (-1 == newIndex) {
|
|
return PR_FALSE;
|
|
}
|
|
nsIFrame* nextBidi;
|
|
nsIFrame* parent;
|
|
aFrame->GetParent(&parent);
|
|
|
|
nsCOMPtr<nsIPresShell> presShell;
|
|
aPresContext->GetShell(getter_AddRefs(presShell) );
|
|
|
|
aOffset = 0;
|
|
|
|
for (index = newIndex; index > aFrameIndex; index--) {
|
|
frame = (nsIFrame*) mLogicalFrames[index];
|
|
frame->GetFrameType(getter_AddRefs(frameType) );
|
|
if (nsLayoutAtoms::directionalFrame == frameType.get() ) {
|
|
delete frame;
|
|
++aOffset;
|
|
}
|
|
else if (parent != nsnull) {
|
|
parent->RemoveFrame(aPresContext, *presShell, nsLayoutAtoms::nextBidi,
|
|
frame);
|
|
}
|
|
else {
|
|
frame->Destroy(aPresContext);
|
|
}
|
|
}
|
|
if (aNextFrame) {
|
|
nsCOMPtr<nsIFrameManager> frameManager;
|
|
presShell->GetFrameManager(getter_AddRefs(frameManager) );
|
|
if (frameManager) {
|
|
// Remove nextBidi property, associated with the current frame
|
|
// and with all of its prev-in-flow.
|
|
frame = aFrame;
|
|
do {
|
|
frameManager->RemoveFrameProperty(frame, nsLayoutAtoms::nextBidi);
|
|
frame->GetPrevInFlow(&frame);
|
|
if (!frame) {
|
|
break;
|
|
}
|
|
frameManager->GetFrameProperty(frame, nsLayoutAtoms::nextBidi,
|
|
0, (void**) &nextBidi);
|
|
} while (aNextFrame == nextBidi);
|
|
} // if (frameManager)
|
|
} // if (aNextFrame)
|
|
|
|
aFrameIndex = newIndex;
|
|
|
|
return PR_TRUE;
|
|
}
|
|
|
|
nsresult
|
|
nsBidiPresUtils::FormatUnicodeText(nsIPresContext* aPresContext,
|
|
PRUnichar* aText,
|
|
PRInt32& aTextLength,
|
|
nsCharType aCharType,
|
|
PRBool aIsOddLevel,
|
|
PRBool aIsBidiSystem)
|
|
{
|
|
nsresult rv;
|
|
if (!mUnicodeUtils) {
|
|
nsCOMPtr<nsIUBidiUtils> bidiUtils = do_GetService("@mozilla.org/intl/unicharbidiutil;1");
|
|
if (!bidiUtils) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
mUnicodeUtils = bidiUtils;
|
|
}
|
|
// ahmed
|
|
//adjusted for correct numeral shaping
|
|
PRUint32 bidiOptions;
|
|
aPresContext->GetBidi(&bidiOptions);
|
|
switch (GET_BIDI_OPTION_NUMERAL(bidiOptions)) {
|
|
|
|
case IBMBIDI_NUMERAL_HINDI:
|
|
mUnicodeUtils->HandleNumbers(aText,aTextLength,IBMBIDI_NUMERAL_HINDI);
|
|
break;
|
|
|
|
case IBMBIDI_NUMERAL_ARABIC:
|
|
mUnicodeUtils->HandleNumbers(aText,aTextLength,IBMBIDI_NUMERAL_ARABIC);
|
|
break;
|
|
|
|
case IBMBIDI_NUMERAL_REGULAR:
|
|
|
|
switch (aCharType) {
|
|
|
|
case eCharType_EuropeanNumber:
|
|
mUnicodeUtils->HandleNumbers(aText,aTextLength,IBMBIDI_NUMERAL_ARABIC);
|
|
break;
|
|
|
|
case eCharType_ArabicNumber:
|
|
mUnicodeUtils->HandleNumbers(aText,aTextLength,IBMBIDI_NUMERAL_HINDI);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case IBMBIDI_NUMERAL_HINDICONTEXT:
|
|
if ( ( (GET_BIDI_OPTION_DIRECTION(bidiOptions)==IBMBIDI_TEXTDIRECTION_RTL) && (IS_ARABIC_DIGIT (aText[0])) ) || (eCharType_ArabicNumber == aCharType) )
|
|
mUnicodeUtils->HandleNumbers(aText,aTextLength,IBMBIDI_NUMERAL_HINDI);
|
|
else if (eCharType_EuropeanNumber == aCharType)
|
|
mUnicodeUtils->HandleNumbers(aText,aTextLength,IBMBIDI_NUMERAL_ARABIC);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
PRInt32 newLen;
|
|
PRUnichar* buffer = (PRUnichar*) mBuffer.GetUnicode();
|
|
// buffer can't be shorter than aText, since it was created from entire block
|
|
|
|
PRBool doReverse = PR_FALSE;
|
|
|
|
printf("aCharType is %d\n", aCharType);
|
|
if (aIsBidiSystem) {
|
|
if (CHARTYPE_IS_RTL(aCharType) ^ aIsOddLevel) {
|
|
doReverse = PR_TRUE;
|
|
printf("doReverse set to TRUE\n");
|
|
}
|
|
}
|
|
else if (aIsOddLevel) {
|
|
doReverse = PR_TRUE;
|
|
}
|
|
newLen = aTextLength;
|
|
if (doReverse) {
|
|
newLen = mBuffer.Length();
|
|
|
|
if ( (eCharType_RightToLeftArabic == aCharType) && !aIsBidiSystem) {
|
|
if (newLen < aTextLength << 1) {
|
|
newLen = aTextLength << 1;
|
|
mBuffer.SetLength(newLen);
|
|
buffer = (PRUnichar*) mBuffer.GetUnicode();
|
|
}
|
|
//ahmed
|
|
PRUnichar aRevBuf [8192];
|
|
PRInt32 aRevBufLen,j;
|
|
mBidiEngine->WriteReverse(aText,aTextLength, aRevBuf, NSBIDI_KEEP_BASE_COMBINING|NSBIDI_DO_MIRRORING, &aRevBufLen);
|
|
for(j=0;j<aRevBufLen;j++){
|
|
aText[j] = aRevBuf[j];
|
|
}
|
|
mUnicodeUtils->ArabicShaping(aText, aTextLength, buffer,
|
|
(PRUint32 *)&newLen);
|
|
} // eCharType_RightToLeftArabic
|
|
else {
|
|
printf("reversing buffer\n");
|
|
rv = mBidiEngine->WriteReverse(aText, aTextLength, buffer,
|
|
NSBIDI_REMOVE_BIDI_CONTROLS | NSBIDI_DO_MIRRORING,
|
|
&newLen);
|
|
}
|
|
} // doReverse
|
|
else {
|
|
buffer = nsnull; // remove this line after writeForward is implemented
|
|
// XXX: todo
|
|
#if 0
|
|
// Still need to remove bidi controls
|
|
rv = mBidiEngine->WriteForward(aText, aTextLength, buffer,
|
|
NSBIDI_REMOVE_BIDI_CONTROLS, &newLen);
|
|
#endif
|
|
}
|
|
if (NS_SUCCEEDED(rv) && buffer) {
|
|
aTextLength = newLen;
|
|
nsCRT::memcpy(aText, buffer, aTextLength * sizeof(PRUnichar) );
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
#if 0 // XXX: for the future use ???
|
|
void
|
|
RemoveDiacritics(PRUnichar* aText,
|
|
PRInt32& aTextLength)
|
|
{
|
|
if (aText && (aTextLength > 0) ) {
|
|
PRInt32 offset = 0;
|
|
|
|
for (PRInt32 i = 0; i < aTextLength && aText[i]; i++) {
|
|
if (IS_BIDI_DIACRITIC(aText[i]) ) {
|
|
++offset;
|
|
continue;
|
|
}
|
|
aText[i - offset] = aText[i];
|
|
}
|
|
aTextLength = i - offset;
|
|
aText[aTextLength] = 0;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void
|
|
nsBidiPresUtils::CalculateCharType(PRInt32 aLimit,
|
|
PRInt32& aOffset,
|
|
PRUint8& aCharType,
|
|
PRUint8& aPrevCharType) const
|
|
{
|
|
PRBool strongTypeFound = PR_FALSE;
|
|
PRInt32 offset;
|
|
nsCharType charType;
|
|
|
|
aCharType = eCharType_OtherNeutral;
|
|
|
|
for (offset = aOffset; offset < aLimit; offset++) {
|
|
// Make sure we give RTL chartype to all that stuff that would be classified
|
|
// as Right-To-Left by a bidi platform.
|
|
// (May differ from the UnicodeData, eg we set RTL chartype to some NSM's.)
|
|
if (IS_HEBREW_CHAR(mBuffer[offset]) ) {
|
|
charType = eCharType_RightToLeft;
|
|
}
|
|
else if (IS_ARABIC_ALPHABETIC(mBuffer[offset]) || IS_FE_CHAR(mBuffer[offset]) ) {
|
|
charType = eCharType_RightToLeftArabic;
|
|
}
|
|
else {
|
|
// IBMBIDI - Egypt - Start
|
|
mBidiEngine->GetCharTypeAt(offset, &charType);
|
|
// IBMBIDI - Egypt - End
|
|
}
|
|
|
|
if (!CHARTYPE_IS_WEAK(charType) ) {
|
|
if ( (eCharType_RightToLeftArabic == aPrevCharType
|
|
|| eCharType_ArabicNumber == aPrevCharType)
|
|
&& eCharType_EuropeanNumber == charType) {
|
|
charType = eCharType_ArabicNumber;
|
|
}
|
|
// Set PrevCharType to the last strong type in this frame
|
|
// (for correct numeric shaping)
|
|
aPrevCharType = charType;
|
|
|
|
// eCharType_RightToLeftArabic, if presents, outweighs
|
|
// (otherwise may miss shaping)
|
|
if (!strongTypeFound || (eCharType_RightToLeftArabic == charType) ) {
|
|
strongTypeFound = PR_TRUE;
|
|
aCharType = charType;
|
|
}
|
|
}
|
|
}
|
|
aOffset = aLimit;
|
|
}
|
|
|
|
nsresult nsBidiPresUtils::GetBidiEngine(nsIBidi** aBidiEngine)
|
|
{
|
|
nsresult rv = NS_ERROR_FAILURE;
|
|
if (mBidiEngine) {
|
|
*aBidiEngine = mBidiEngine;
|
|
rv = NS_OK;
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
#endif // IBMBIDI
|