зеркало из https://github.com/mozilla/gecko-dev.git
Simplified bidi code in GetFrameFromDirection; changed bidi semantics of eDirPrevious, eDirNext. bug=330815 r=smontagu sr=roc
This commit is contained in:
uriber%gmail.com
Родитель
e26140ab7d
Коммит
4faccc8fe3
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@ -4467,206 +4467,51 @@ nsFrame::GetLineNumber(nsIFrame *aFrame, nsIFrame** aContainingBlock)
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return thisLine;
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}
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//this will use the nsFrameTraversal as the default peek method.
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//this should change to use geometry and also look to ALL the child lists
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//we need to set up line information to make sure we dont jump across line boundaries
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NS_IMETHODIMP
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nsFrame::GetFrameFromDirection(nsPresContext* aPresContext, nsPeekOffsetStruct *aPos)
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{
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nsIFrame *blockFrame;
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nsCOMPtr<nsILineIteratorNavigator> it;
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PRBool preferLeft = aPos->mPreferLeft;
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nsresult result;
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PRInt32 thisLine = GetLineNumber(this, &blockFrame);
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if (thisLine < 0)
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return NS_ERROR_FAILURE;
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result = blockFrame->QueryInterface(NS_GET_IID(nsILineIteratorNavigator),getter_AddRefs(it));
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NS_ASSERTION(NS_SUCCEEDED(result) && it, "GetLineNumber() succeeded but no block frame?");
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// Find the prev/next selectable frame
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PRBool selectable = PR_FALSE;
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nsIFrame *traversedFrame = this;
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while (!selectable) {
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nsIFrame *blockFrame;
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nsCOMPtr<nsILineIteratorNavigator> it;
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nsIFrame *firstFrame;
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nsIFrame *lastFrame;
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nsRect nonUsedRect;
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PRInt32 lineFrameCount;
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PRUint32 lineFlags;
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#ifdef IBMBIDI
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/* Check whether the visual and logical order of the frames are different */
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PRBool lineIsReordered = PR_FALSE;
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nsIFrame *firstVisual;
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nsIFrame *lastVisual;
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PRBool lineIsRTL;
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PRBool lineJump = PR_FALSE;
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it->GetDirection(&lineIsRTL);
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result = it->CheckLineOrder(thisLine, &lineIsReordered, &firstVisual, &lastVisual);
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if (NS_FAILED(result))
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return result;
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if (lineIsReordered) {
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firstFrame = firstVisual;
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lastFrame = lastVisual;
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}
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else
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#endif
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{
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result = it->GetLine(thisLine, &firstFrame, &lineFrameCount,nonUsedRect,
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&lineFlags);
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if (NS_FAILED(result))
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return result;
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lastFrame = firstFrame;
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for (;lineFrameCount > 1;lineFrameCount --){
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result = it->GetNextSiblingOnLine(lastFrame, thisLine);
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if (NS_FAILED(result) || !lastFrame){
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NS_ASSERTION(0,"should not be reached nsFrame\n");
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return NS_ERROR_FAILURE;
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}
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}
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}
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GetFirstLeaf(aPresContext, &firstFrame);
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GetLastLeaf(aPresContext, &lastFrame);
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//END LINE DATA CODE
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if
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#ifndef IBMBIDI // jumping lines in RTL paragraphs
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((aPos->mDirection == eDirNext && lastFrame == this)
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||(aPos->mDirection == eDirPrevious && firstFrame == this))
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#else
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(((lineIsRTL) &&
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((aPos->mDirection == eDirNext && firstFrame == this)
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||(aPos->mDirection == eDirPrevious && lastFrame == this)))
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((!lineIsRTL) &&
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((aPos->mDirection == eDirNext && lastFrame == this)
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||(aPos->mDirection == eDirPrevious && firstFrame == this))))
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#endif
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{
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if (aPos->mJumpLines != PR_TRUE)
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return NS_ERROR_FAILURE;//we are done. cannot jump lines
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#ifdef IBMBIDI
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lineJump = PR_TRUE;
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#endif
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if (aPos->mAmount != eSelectWord)
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{
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preferLeft = (PRBool)!preferLeft;//drift to other side
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aPos->mAmount = eSelectNoAmount;
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}
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else{
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if (aPos->mEatingWS)//done finding what we wanted
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return NS_ERROR_FAILURE;
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if (aPos->mDirection == eDirNext)
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{
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preferLeft = (PRBool)!preferLeft;//drift to other side
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}
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#ifdef IBMBIDI
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if (lineIsRTL)
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aPos->mAmount = eSelectNoAmount;
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#endif
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}
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}
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if (aPos->mAmount == eSelectDir)
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aPos->mAmount = eSelectNoAmount;//just get to next frame.
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nsCOMPtr<nsIBidirectionalEnumerator> frameTraversal;
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#ifdef IBMBIDI
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result = NS_NewFrameTraversal(getter_AddRefs(frameTraversal),
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lineIsReordered ? VISUAL : LEAF,
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aPresContext,
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traversedFrame, aPos->mScrollViewStop);
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#else
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//if we are a container frame we MUST init with last leaf for eDirNext
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//
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result = NS_NewFrameTraversal(getter_AddRefs(frameTraversal), LEAF, aPresContext, traversedFrame, aPos->mScrollViewStop);
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#endif
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if (NS_FAILED(result))
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return result;
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nsISupports *isupports = nsnull;
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#ifdef IBMBIDI
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nsIFrame *newFrame;
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for (;;) {
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if (lineIsRTL)
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if (aPos->mDirection == eDirPrevious)
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result = frameTraversal->Next();
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else
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result = frameTraversal->Prev();
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else
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#endif
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if (aPos->mDirection == eDirNext)
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result = frameTraversal->Next();
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else
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result = frameTraversal->Prev();
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if (NS_FAILED(result))
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return result;
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result = frameTraversal->CurrentItem(&isupports);
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if (NS_FAILED(result))
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return result;
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if (!isupports)
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return NS_ERROR_NULL_POINTER;
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//we must CAST here to an nsIFrame. nsIFrame doesn't really follow the rules
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//for speed reasons
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#ifndef IBMBIDI
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nsIFrame *newFrame = (nsIFrame *)isupports;
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#else
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newFrame = (nsIFrame *)isupports;
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nsIContent *content = newFrame->GetContent();
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if (!lineJump && (content == mContent))
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{
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//we will continue if this is NOT a text node.
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//in the case of a text node since that does not mean we are stuck. it could mean a change in style for
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//the text node. in the case of a hruleframe with generated before and after content, we do not
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//want the splittable generated frame to get us stuck on an HR
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if (nsLayoutAtoms::textFrame != newFrame->GetType())
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continue; //we should NOT be getting stuck on the same piece of content on the same line. skip to next line.
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}
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PRBool isBidiGhostFrame = (newFrame->GetRect().IsEmpty() &&
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(newFrame->GetStateBits() & NS_FRAME_IS_BIDI));
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if (isBidiGhostFrame)
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{
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// If the rectangle is empty and the NS_FRAME_IS_BIDI flag is set, this is most likely
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// a non-renderable frame created at the end of the line by Bidi reordering.
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lineJump = PR_TRUE;
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aPos->mAmount = eSelectNoAmount;
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}
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else
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{
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PRBool selectable = PR_TRUE; //usually fine
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newFrame->IsSelectable(&selectable, nsnull);
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if (selectable)
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break; // for (;;)
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}
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PRBool newLineIsRTL = PR_FALSE;
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if (lineJump) {
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thisLine = GetLineNumber(newFrame, &blockFrame);
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PRInt32 thisLine = GetLineNumber(traversedFrame, &blockFrame);
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if (thisLine < 0)
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return NS_ERROR_FAILURE;
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result = blockFrame->QueryInterface(NS_GET_IID(nsILineIteratorNavigator),getter_AddRefs(it));
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nsresult result = blockFrame->QueryInterface(NS_GET_IID(nsILineIteratorNavigator),getter_AddRefs(it));
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NS_ASSERTION(NS_SUCCEEDED(result) && it, "GetLineNumber() succeeded but no block frame?");
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it->GetDirection(&newLineIsRTL);
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nsIFrame *firstFrame;
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nsIFrame *lastFrame;
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nsRect nonUsedRect;
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PRInt32 lineFrameCount;
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PRUint32 lineFlags;
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#ifdef IBMBIDI
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/* Check whether the visual and logical order of the frames are different */
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PRBool lineIsReordered = PR_FALSE;
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nsIFrame *firstVisual;
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nsIFrame *lastVisual;
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result = it->CheckLineOrder(thisLine, &lineIsReordered, &firstVisual, &lastVisual);
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if (NS_FAILED(result))
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return result;
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if (lineIsReordered)
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{
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if (lineIsReordered) {
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firstFrame = firstVisual;
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lastFrame = lastVisual;
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}
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else
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#endif
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{
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result = it->GetLine(thisLine, &firstFrame, &lineFrameCount, nonUsedRect,
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result = it->GetLine(thisLine, &firstFrame, &lineFrameCount,nonUsedRect,
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&lineFlags);
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if (NS_FAILED(result))
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return result;
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if (!firstFrame)
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return NS_ERROR_FAILURE;
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lastFrame = firstFrame;
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for (;lineFrameCount > 1;lineFrameCount --){
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@ -4678,43 +4523,77 @@ nsFrame::GetFrameFromDirection(nsPresContext* aPresContext, nsPeekOffsetStruct *
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}
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}
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GetFirstLeaf(aPresContext, &firstFrame);
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GetLastLeaf(aPresContext, &lastFrame);
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if (newLineIsRTL) {
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if (aPos->mDirection == eDirPrevious)
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newFrame = firstFrame;
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else
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newFrame = lastFrame;
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}
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else {
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if (aPos->mDirection == eDirNext)
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newFrame = firstFrame;
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else
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newFrame = lastFrame;
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GetFirstLeaf(aPresContext, &firstFrame); // XXX Should be GetFirstVisualLeaf
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GetLastLeaf(aPresContext, &lastFrame); // XXX Should be GetLastVisualLeaf
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//END LINE DATA CODE
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if ((aPos->mDirection == eDirNext && lastFrame == traversedFrame)
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|| (aPos->mDirection == eDirPrevious && firstFrame == traversedFrame))
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{
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if (aPos->mJumpLines != PR_TRUE)
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return NS_ERROR_FAILURE;//we are done. cannot jump lines
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if (aPos->mAmount != eSelectWord)
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{
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preferLeft = (PRBool)!preferLeft;//drift to other side
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aPos->mAmount = eSelectNoAmount;
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}
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else{
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if (aPos->mEatingWS)//done finding what we wanted
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return NS_ERROR_FAILURE;
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if (aPos->mDirection == eDirNext)
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{
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preferLeft = (PRBool)!preferLeft;//drift to other side
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}
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}
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}
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PRBool selectable = PR_TRUE; //usually fine
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newFrame->IsSelectable(&selectable, nsnull);
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if (!selectable)
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lineJump = PR_FALSE;
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} // for (;;) we will break from inside
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#endif // IBMBIDI
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if (aPos->mAmount == eSelectDir)
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aPos->mAmount = eSelectNoAmount;//just get to next frame.
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nsCOMPtr<nsIBidirectionalEnumerator> frameTraversal;
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result = NS_NewFrameTraversal(getter_AddRefs(frameTraversal),
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#ifdef IBMBIDI
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lineIsReordered ? VISUAL :
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#endif
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LEAF,
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aPresContext,
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traversedFrame, aPos->mScrollViewStop);
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if (NS_FAILED(result))
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return result;
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nsISupports *isupports = nsnull;
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if (aPos->mDirection == eDirNext)
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result = frameTraversal->Next();
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else
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result = frameTraversal->Prev();
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if (NS_FAILED(result))
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return result;
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result = frameTraversal->CurrentItem(&isupports);
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if (NS_FAILED(result))
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return result;
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if (!isupports)
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return NS_ERROR_NULL_POINTER;
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//we must CAST here to an nsIFrame. nsIFrame doesn't really follow the rules
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//for speed reasons
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traversedFrame = (nsIFrame *)isupports;
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traversedFrame->IsSelectable(&selectable, nsnull);
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} // while (!selectable)
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if (aPos->mDirection == eDirNext)
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aPos->mStartOffset = 0;
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else
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aPos->mStartOffset = -1;
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#ifdef IBMBIDI
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PRUint8 oldLevel = NS_GET_EMBEDDING_LEVEL(this);
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PRUint8 newLevel = NS_GET_EMBEDDING_LEVEL(newFrame);
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if (newLevel & 1) // The new frame is RTL, go to the other end
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PRUint8 newLevel = NS_GET_EMBEDDING_LEVEL(traversedFrame);
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PRUint8 newBaseLevel = NS_GET_BASE_LEVEL(traversedFrame);
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if ((newLevel & 1) != (newBaseLevel & 1)) // The new frame is reverse-direction, go to the other end
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aPos->mStartOffset = -1 - aPos->mStartOffset;
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if ((aPos->mAmount == eSelectNoAmount) && ((newLevel & 1) != (oldLevel & 1))) {
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preferLeft = (PRBool)!preferLeft;
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}
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#endif
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aPos->mResultFrame = newFrame;
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aPos->mResultFrame = traversedFrame;
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aPos->mPreferLeft = preferLeft;
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return NS_OK;
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}
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@ -76,6 +76,7 @@
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#include "nsIFrameTraversal.h"
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#include "nsLayoutUtils.h"
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#include "nsLayoutCID.h"
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#include "nsBidiPresUtils.h"
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static NS_DEFINE_CID(kFrameTraversalCID, NS_FRAMETRAVERSAL_CID);
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#include "nsIDOMText.h"
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@ -1380,17 +1381,20 @@ nsSelection::MoveCaret(PRUint32 aKeycode, PRBool aContinueSelection, nsSelection
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pos.SetData(mShell, desiredX, aAmount, eDirPrevious, offsetused, PR_FALSE,
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PR_TRUE, PR_TRUE, mLimiter != nsnull, PR_TRUE);
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nsBidiLevel baseLevel = nsBidiPresUtils::GetFrameBaseLevel(frame);
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HINT tHint(mHint); //temporary variable so we dont set mHint until it is necessary
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switch (aKeycode){
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case nsIDOMKeyEvent::DOM_VK_RIGHT :
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InvalidateDesiredX();
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pos.mDirection = eDirNext;
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tHint = HINTLEFT;//stick to this line
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pos.mDirection = (baseLevel & 1) ? eDirPrevious : eDirNext;
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tHint = (baseLevel & 1) ? HINTRIGHT : HINTLEFT; //stick to opposite of movement
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PostReason(nsISelectionListener::KEYPRESS_REASON);
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break;
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case nsIDOMKeyEvent::DOM_VK_LEFT : //no break
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InvalidateDesiredX();
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tHint = HINTRIGHT;//stick to opposite of movement
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pos.mDirection = (baseLevel & 1) ? eDirNext : eDirPrevious;
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tHint = (baseLevel & 1) ? HINTLEFT : HINTRIGHT; //stick to opposite of movement
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PostReason(nsISelectionListener::KEYPRESS_REASON);
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break;
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case nsIDOMKeyEvent::DOM_VK_DOWN :
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@ -4526,17 +4526,21 @@ nsTextFrame::PeekOffset(nsPresContext* aPresContext, nsPeekOffsetStruct *aPos)
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// line as well as on different lines.
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//
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// Note:
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// eDirPrevious actually means 'in the visual left-then-down direction'
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// eDirNext actually means 'in the visual right-then-down direction'
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// (this is again due to the LTRish bias of the nomenclature)
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// eDirPrevious means 'left-then-up' if the containing block is LTR,
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// 'right-then-up' if it is RTL.
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// eDirNext means 'right-then-down' if the containing block is LTR,
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// 'left-then-down' if it is RTL.
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// Between paragraphs, eDirPrevious means "go to the visual end of the
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// previous paragraph", and eDirNext means "go to the visual beginning of
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// the next paragraph"
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PRBool isOddLevel = NS_GET_EMBEDDING_LEVEL(this) & 1;
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PRBool isReverseDirection = (NS_GET_EMBEDDING_LEVEL(this) & 1) != (NS_GET_BASE_LEVEL(this) & 1);
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if ((eSelectCharacter == aPos->mAmount)
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|| (eSelectWord == aPos->mAmount))
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// this 'flip' will be in effect only for this frame, not
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// for recursive calls to PeekOffset()
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aPos->mPreferLeft ^= isOddLevel;
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aPos->mPreferLeft ^= isReverseDirection;
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#endif
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if (!aPos || !mContent)
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@ -4580,7 +4584,7 @@ nsTextFrame::PeekOffset(nsPresContext* aPresContext, nsPeekOffsetStruct *aPos)
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// to the next frame
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if ((eSelectCharacter == aPos->mAmount)
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|| (eSelectWord == aPos->mAmount))
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aPos->mPreferLeft ^= isOddLevel;
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aPos->mPreferLeft ^= isReverseDirection;
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return nextContinuation->PeekOffset(aPresContext, aPos);
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}
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@ -4662,8 +4666,8 @@ nsTextFrame::PeekOffset(nsPresContext* aPresContext, nsPeekOffsetStruct *aPos)
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#ifdef IBMBIDI // Simon - RTL frames reverse meaning of previous and next
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// so that right arrow always moves to the right on screen
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// and left arrow always moves left
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if ( ((aPos->mDirection == eDirPrevious) && !isOddLevel) ||
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((aPos->mDirection == eDirNext) && isOddLevel) ){
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if ( ((aPos->mDirection == eDirPrevious) && !isReverseDirection) ||
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((aPos->mDirection == eDirNext) && isReverseDirection) ){
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#else
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if (aPos->mDirection == eDirPrevious){
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#endif
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@ -4720,8 +4724,8 @@ nsTextFrame::PeekOffset(nsPresContext* aPresContext, nsPeekOffsetStruct *aPos)
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}
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}
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#ifdef IBMBIDI // Simon, as above
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else if ( ((aPos->mDirection == eDirNext) && !isOddLevel) ||
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((aPos->mDirection == eDirPrevious) && isOddLevel) ){
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else if ( ((aPos->mDirection == eDirNext) && !isReverseDirection) ||
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((aPos->mDirection == eDirPrevious) && isReverseDirection) ){
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#else
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else if (aPos->mDirection == eDirNext){
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#endif
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@ -4796,7 +4800,7 @@ nsTextFrame::PeekOffset(nsPresContext* aPresContext, nsPeekOffsetStruct *aPos)
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// note that mAmount, as well as mPreferLeft might have been modified
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// by the call to GetFrameFromDirection (if we are moving to another line)
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if (eSelectCharacter == aPos->mAmount)
|
||||
aPos->mPreferLeft ^= isOddLevel;
|
||||
aPos->mPreferLeft ^= isReverseDirection;
|
||||
result = aPos->mResultFrame->PeekOffset(aPresContext, aPos);
|
||||
if (NS_FAILED(result))
|
||||
return result;
|
||||
|
|
@ -4837,8 +4841,8 @@ nsTextFrame::PeekOffset(nsPresContext* aPresContext, nsPeekOffsetStruct *aPos)
|
|||
#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) ) {
|
||||
if ( ((aPos->mDirection == eDirPrevious) && !isReverseDirection) ||
|
||||
((aPos->mDirection == eDirNext) && isReverseDirection) ) {
|
||||
#else
|
||||
if (aPos->mDirection == eDirPrevious){
|
||||
#endif
|
||||
|
|
@ -4890,8 +4894,8 @@ nsTextFrame::PeekOffset(nsPresContext* aPresContext, nsPeekOffsetStruct *aPos)
|
|||
}
|
||||
}
|
||||
#ifdef IBMBIDI // Simon, as above
|
||||
else if ( ((aPos->mDirection == eDirNext) && !isOddLevel) ||
|
||||
((aPos->mDirection == eDirPrevious) && isOddLevel) ) {
|
||||
else if ( ((aPos->mDirection == eDirNext) && !isReverseDirection) ||
|
||||
((aPos->mDirection == eDirPrevious) && isReverseDirection) ) {
|
||||
#else
|
||||
else if (aPos->mDirection == eDirNext) {
|
||||
#endif
|
||||
|
|
@ -4971,7 +4975,7 @@ nsTextFrame::PeekOffset(nsPresContext* aPresContext, nsPeekOffsetStruct *aPos)
|
|||
// 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;
|
||||
aPos->mPreferLeft ^= isReverseDirection;
|
||||
if (NS_SUCCEEDED(result = aPos->mResultFrame->PeekOffset(aPresContext, aPos)))
|
||||
return NS_OK;//else fall through
|
||||
else if (aPos->mDirection == eDirNext)
|
||||
|
|
|
|||
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