зеркало из https://github.com/mozilla/gecko-dev.git
2499 строки
78 KiB
C++
2499 строки
78 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 License
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* Version 1.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
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* the License for the specific language governing rights and limitations
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* 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 Copyright (C) 1998
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* Netscape Communications Corporation. All Rights Reserved.
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*/
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#include "nsCOMPtr.h"
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#include "nsLineLayout.h"
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#include "nsStyleConsts.h"
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#include "nsHTMLContainerFrame.h"
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#include "nsHTMLIIDs.h"
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#include "nsISpaceManager.h"
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#include "nsIStyleContext.h"
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#include "nsIPresContext.h"
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#include "nsIFontMetrics.h"
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#include "nsIRenderingContext.h"
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#include "nsLayoutAtoms.h"
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#include "nsPlaceholderFrame.h"
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#include "nsIReflowCommand.h"
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#include "nsIDocument.h"
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#include "nsIHTMLDocument.h"
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#include "nsIContent.h"
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#ifdef DEBUG
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#undef NOISY_HORIZONTAL_ALIGN
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#undef NOISY_VERTICAL_ALIGN
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#undef REALLY_NOISY_VERTICAL_ALIGN
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#undef NOISY_REFLOW
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#undef REALLY_NOISY_REFLOW
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#undef NOISY_PUSHING
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#undef REALLY_NOISY_PUSHING
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#undef DEBUG_ADD_TEXT
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#undef NOISY_MAX_ELEMENT_SIZE
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#undef REALLY_NOISY_MAX_ELEMENT_SIZE
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#undef NOISY_CAN_PLACE_FRAME
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#undef NOISY_TRIM
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#undef REALLY_NOISY_TRIM
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#endif
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MOZ_DECL_CTOR_COUNTER(nsTextRun);
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nsTextRun::nsTextRun()
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{
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MOZ_COUNT_CTOR(nsTextRun);
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mNext = nsnull;
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}
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nsTextRun::~nsTextRun()
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{
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MOZ_COUNT_DTOR(nsTextRun);
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}
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void
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nsTextRun::List(FILE* out, PRInt32 aIndent)
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{
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PRInt32 i;
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for (i = aIndent; --i >= 0; ) fputs(" ", out);
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PRInt32 n = mArray.Count();
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fprintf(out, "%p: count=%d <", this, n);
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for (i = 0; i < n; i++) {
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nsIFrame* text = (nsIFrame*) mArray.ElementAt(i);
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nsAutoString tmp;
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text->GetFrameName(tmp);
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fputs(tmp, out);
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printf("@%p ", text);
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}
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fputs(">\n", out);
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}
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//----------------------------------------------------------------------
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#define PLACED_LEFT 0x1
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#define PLACED_RIGHT 0x2
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MOZ_DECL_CTOR_COUNTER(nsLineLayout);
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nsLineLayout::nsLineLayout(nsIPresContext& aPresContext,
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nsISpaceManager* aSpaceManager,
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const nsHTMLReflowState* aOuterReflowState,
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PRBool aComputeMaxElementSize)
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: mPresContext(aPresContext),
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mSpaceManager(aSpaceManager),
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mBlockReflowState(aOuterReflowState),
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mBlockRS(nsnull),/* XXX temporary */
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mMinLineHeight(0),
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mComputeMaxElementSize(aComputeMaxElementSize)
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{
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MOZ_COUNT_CTOR(nsLineLayout);
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// Stash away some style data that we need
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aOuterReflowState->frame->GetStyleData(eStyleStruct_Text,
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(const nsStyleStruct*&) mStyleText);
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mTextAlign = mStyleText->mTextAlign;
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mLineNumber = 0;
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mColumn = 0;
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mEndsInWhiteSpace = PR_TRUE;
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mUnderstandsWhiteSpace = PR_FALSE;
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mFirstLetterStyleOK = PR_FALSE;
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mIsTopOfPage = PR_FALSE;
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mUpdatedBand = PR_FALSE;
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mPlacedFloaters = 0;
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mImpactedByFloaters = PR_FALSE;
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mTotalPlacedFrames = 0;
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mTopEdge = mBottomEdge = 0;
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mReflowTextRuns = nsnull;
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mTextRun = nsnull;
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// Instead of always pre-initializing the free-lists for frames and
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// spans, we do it on demand so that situations that only use a few
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// frames and spans won't waste alot of time in unneeded
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// initialization.
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mInitialFramesFreed = mInitialSpansFreed = 0;
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mFrameFreeList = nsnull;
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mSpanFreeList = nsnull;
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mCurrentSpan = mRootSpan = nsnull;
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mSpanDepth = 0;
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mTextRuns = nsnull;
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mTextRunP = &mTextRuns;
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mNewTextRun = nsnull;
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mKnowStrictMode = PR_FALSE;
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}
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nsLineLayout::nsLineLayout(nsIPresContext& aPresContext)
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: mPresContext(aPresContext)
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{
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MOZ_COUNT_CTOR(nsLineLayout);
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mTextRuns = nsnull;
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mTextRunP = &mTextRuns;
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mNewTextRun = nsnull;
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mRootSpan = nsnull;
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mSpanFreeList = nsnull;
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mFrameFreeList = nsnull;
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}
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nsLineLayout::~nsLineLayout()
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{
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MOZ_COUNT_DTOR(nsLineLayout);
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NS_ASSERTION(nsnull == mRootSpan, "bad line-layout user");
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nsTextRun::DeleteTextRuns(mTextRuns);
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// Free up all of the per-span-data items that were allocated on the heap
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PerSpanData* psd = mSpanFreeList;
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while (nsnull != psd) {
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PerSpanData* nextSpan = psd->mNextFreeSpan;
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if ((psd < &mSpanDataBuf[0]) ||
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(psd >= &mSpanDataBuf[NS_LINELAYOUT_NUM_SPANS])) {
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delete psd;
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}
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psd = nextSpan;
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}
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// Free up all of the per-frame-data items that were allocated on the heap
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PerFrameData* pfd = mFrameFreeList;
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while (nsnull != pfd) {
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PerFrameData* nextFrame = pfd->mNext;
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if ((pfd < &mFrameDataBuf[0]) ||
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(pfd >= &mFrameDataBuf[NS_LINELAYOUT_NUM_FRAMES])) {
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delete pfd;
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}
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pfd = nextFrame;
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}
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}
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PRBool
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nsLineLayout::InStrictMode()
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{
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// XXX For now this is always part of the build until harishd lands
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// the dtd auto-detect code...
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#if 1
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static PRBool forceStrictMode = PR_FALSE;
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#if defined(XP_UNIX) || defined(XP_PC) || defined(XP_BEOS)
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{
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static int firstTime = 1;
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if (firstTime) {
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if (getenv("GECKO_FORCE_STRICT_MODE")) {
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forceStrictMode = PR_TRUE;
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}
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firstTime = 0;
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}
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}
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#endif
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if (forceStrictMode) {
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mKnowStrictMode = PR_TRUE;
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mInStrictMode = PR_TRUE;
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return mInStrictMode;
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}
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#endif
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if (!mKnowStrictMode) {
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mKnowStrictMode = PR_TRUE;
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mInStrictMode = PR_TRUE;
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// Dig up the compatabilty mode out of the underlying document, if
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// we can find it.
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if (mBlockReflowState->frame) {
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nsCOMPtr<nsIContent> content;
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mBlockReflowState->frame->GetContent(getter_AddRefs(content));
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if (content) {
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nsCOMPtr<nsIDocument> doc;
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content->GetDocument(*getter_AddRefs(doc));
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if (doc) {
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nsCOMPtr<nsIHTMLDocument> hdoc(do_QueryInterface(doc));
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if (hdoc) {
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nsDTDMode mode;
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hdoc->GetDTDMode(mode);
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if (eDTDMode_NoQuirks != mode) {
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mInStrictMode = PR_FALSE;
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}
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}
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}
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}
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}
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}
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return mInStrictMode;
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}
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void
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nsLineLayout::BeginLineReflow(nscoord aX, nscoord aY,
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nscoord aWidth, nscoord aHeight,
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PRBool aImpactedByFloaters,
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PRBool aIsTopOfPage)
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{
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NS_ASSERTION(nsnull == mRootSpan, "bad linelayout user");
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#ifdef DEBUG
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if ((aWidth != NS_UNCONSTRAINEDSIZE) && CRAZY_WIDTH(aWidth)) {
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nsFrame::ListTag(stdout, mBlockReflowState->frame);
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printf(": Init: bad caller: width WAS %d(0x%x)\n",
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aWidth, aWidth);
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aWidth = NS_UNCONSTRAINEDSIZE;
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}
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if ((aHeight != NS_UNCONSTRAINEDSIZE) && CRAZY_HEIGHT(aHeight)) {
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nsFrame::ListTag(stdout, mBlockReflowState->frame);
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printf(": Init: bad caller: height WAS %d(0x%x)\n",
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aHeight, aHeight);
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aHeight = NS_UNCONSTRAINEDSIZE;
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}
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#endif
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#ifdef NOISY_REFLOW
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nsFrame::ListTag(stdout, mBlockReflowState->frame);
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printf(": BeginLineReflow: %d,%d,%d,%d %s\n",
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aX, aY, aWidth, aHeight,
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aIsTopOfPage ? "top-of-page" : "");
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#endif
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#ifdef DEBUG
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mSpansAllocated = mSpansFreed = mFramesAllocated = mFramesFreed = 0;
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#endif
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mColumn = 0;
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mEndsInWhiteSpace = PR_TRUE;
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mUnderstandsWhiteSpace = PR_FALSE;
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mFirstLetterStyleOK = PR_FALSE;
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mIsTopOfPage = aIsTopOfPage;
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mUpdatedBand = PR_FALSE;
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mPlacedFloaters = 0;
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mImpactedByFloaters = aImpactedByFloaters;
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mTotalPlacedFrames = 0;
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mCanPlaceFloater = PR_TRUE;
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mSpanDepth = 0;
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mMaxTopBoxHeight = mMaxBottomBoxHeight = 0;
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ForgetWordFrames();
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PerSpanData* psd;
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NewPerSpanData(&psd);
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mCurrentSpan = mRootSpan = psd;
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psd->mReflowState = mBlockReflowState;
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psd->mLeftEdge = aX;
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psd->mX = aX;
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if (NS_UNCONSTRAINEDSIZE == aWidth) {
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psd->mRightEdge = NS_UNCONSTRAINEDSIZE;
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}
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else {
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psd->mRightEdge = aX + aWidth;
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}
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mTopEdge = aY;
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if (NS_UNCONSTRAINEDSIZE == aHeight) {
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mBottomEdge = NS_UNCONSTRAINEDSIZE;
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}
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else {
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mBottomEdge = aY + aHeight;
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}
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switch (mStyleText->mWhiteSpace) {
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case NS_STYLE_WHITESPACE_PRE:
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case NS_STYLE_WHITESPACE_NOWRAP:
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psd->mNoWrap = PR_TRUE;
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break;
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default:
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psd->mNoWrap = PR_FALSE;
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break;
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}
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psd->mDirection = mBlockReflowState->mStyleDisplay->mDirection;
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psd->mChangedFrameDirection = PR_FALSE;
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}
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void
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nsLineLayout::EndLineReflow()
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{
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#ifdef NOISY_REFLOW
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nsFrame::ListTag(stdout, mBlockReflowState->frame);
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printf(": EndLineReflow: width=%d\n", mRootSpan->mX - mRootSpan->mLeftEdge);
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#endif
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FreeSpan(mRootSpan);
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mCurrentSpan = mRootSpan = nsnull;
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NS_ASSERTION(mSpansAllocated == mSpansFreed, "leak");
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NS_ASSERTION(mFramesAllocated == mFramesFreed, "leak");
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#if 0
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static PRInt32 maxSpansAllocated = NS_LINELAYOUT_NUM_SPANS;
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static PRInt32 maxFramesAllocated = NS_LINELAYOUT_NUM_FRAMES;
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if (mSpansAllocated > maxSpansAllocated) {
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printf("XXX: saw a line with %d spans\n", mSpansAllocated);
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maxSpansAllocated = mSpansAllocated;
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}
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if (mFramesAllocated > maxFramesAllocated) {
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printf("XXX: saw a line with %d frames\n", mFramesAllocated);
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maxFramesAllocated = mFramesAllocated;
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}
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#endif
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}
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// XXX swtich to a single mAvailLineWidth that we adjust as each frame
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// on the line is placed. Each span can still have a per-span mX that
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// tracks where a child frame is going in its span; they don't need a
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// per-span mLeftEdge?
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// XXX currently broken because it doesn't recurse through the nested
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// spans that are currently open to update their right edge.
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void
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nsLineLayout::UpdateBand(nscoord aX, nscoord aY,
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nscoord aWidth, nscoord aHeight,
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PRBool aPlacedLeftFloater)
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{
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PerSpanData* psd = mRootSpan;
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NS_PRECONDITION(psd->mX == psd->mLeftEdge, "update-band called late");
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#ifdef DEBUG
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if ((aWidth != NS_UNCONSTRAINEDSIZE) && CRAZY_WIDTH(aWidth)) {
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nsFrame::ListTag(stdout, mBlockReflowState->frame);
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printf(": UpdateBand: bad caller: width WAS %d(0x%x)\n",
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aWidth, aWidth);
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aWidth = NS_UNCONSTRAINEDSIZE;
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}
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if ((aHeight != NS_UNCONSTRAINEDSIZE) && CRAZY_HEIGHT(aHeight)) {
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nsFrame::ListTag(stdout, mBlockReflowState->frame);
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printf(": UpdateBand: bad caller: height WAS %d(0x%x)\n",
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aHeight, aHeight);
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aHeight = NS_UNCONSTRAINEDSIZE;
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}
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#endif
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// Compute the difference between last times width and the new width
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nscoord deltaWidth = 0;
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if (NS_UNCONSTRAINEDSIZE != psd->mRightEdge) {
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NS_ASSERTION(NS_UNCONSTRAINEDSIZE != aWidth, "switched constraints");
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nscoord oldWidth = psd->mRightEdge - psd->mLeftEdge;
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deltaWidth = aWidth - oldWidth;
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}
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#ifdef NOISY_REFLOW
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nsFrame::ListTag(stdout, mBlockReflowState->frame);
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printf(": UpdateBand: %d,%d,%d,%d deltaWidth=%d %s floater\n",
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aX, aY, aWidth, aHeight, deltaWidth,
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aPlacedLeftFloater ? "left" : "right");
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#endif
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psd->mLeftEdge = aX;
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psd->mX = aX;
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if (NS_UNCONSTRAINEDSIZE == aWidth) {
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psd->mRightEdge = NS_UNCONSTRAINEDSIZE;
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}
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else {
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psd->mRightEdge = aX + aWidth;
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}
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mTopEdge = aY;
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if (NS_UNCONSTRAINEDSIZE == aHeight) {
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mBottomEdge = NS_UNCONSTRAINEDSIZE;
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}
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else {
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mBottomEdge = aY + aHeight;
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}
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mUpdatedBand = PR_TRUE;
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mPlacedFloaters |= (aPlacedLeftFloater ? PLACED_LEFT : PLACED_RIGHT);
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mImpactedByFloaters = PR_TRUE;
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// Now update all of the open spans...
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psd = mCurrentSpan;
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while (psd != mRootSpan) {
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NS_ASSERTION(nsnull != psd, "null ptr");
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if (nsnull == psd) {
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break;
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}
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NS_ASSERTION(psd->mX == psd->mLeftEdge, "bad floater placement");
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if (NS_UNCONSTRAINEDSIZE == aWidth) {
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psd->mRightEdge = NS_UNCONSTRAINEDSIZE;
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}
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else {
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psd->mRightEdge += deltaWidth;
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}
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#ifdef NOISY_REFLOW
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printf(" span %p: oldRightEdge=%d newRightEdge=%d\n",
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psd, psd->mRightEdge - deltaWidth, psd->mRightEdge);
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#endif
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psd = psd->mParent;
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}
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}
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// Note: Only adjust the outermost frames (the ones that are direct
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// children of the block), not the ones in the child spans. The reason
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// is simple: the frames in the spans have coordinates local to their
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// parent therefore they are moved when their parent span is moved.
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void
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nsLineLayout::UpdateFrames()
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{
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NS_ASSERTION(nsnull != mRootSpan, "UpdateFrames with no active spans");
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PerSpanData* psd = mRootSpan;
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if (NS_STYLE_DIRECTION_LTR == psd->mDirection) {
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if (PLACED_LEFT & mPlacedFloaters) {
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PerFrameData* pfd = psd->mFirstFrame;
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while (nsnull != pfd) {
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pfd->mBounds.x = psd->mX;
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pfd = pfd->mNext;
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}
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}
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}
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else if (PLACED_RIGHT & mPlacedFloaters) {
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// XXX handle DIR=right-to-left
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}
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}
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nsresult
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nsLineLayout::NewPerSpanData(PerSpanData** aResult)
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{
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PerSpanData* psd = mSpanFreeList;
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if (nsnull == psd) {
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if (mInitialSpansFreed < NS_LINELAYOUT_NUM_SPANS) {
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// use one of the ones defined in our struct...
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psd = &mSpanDataBuf[mInitialSpansFreed++];
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}
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else {
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psd = new PerSpanData;
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if (nsnull == psd) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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}
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}
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else {
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mSpanFreeList = psd->mNextFreeSpan;
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}
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psd->mParent = nsnull;
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psd->mFrame = nsnull;
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psd->mFirstFrame = nsnull;
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psd->mLastFrame = nsnull;
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#ifdef DEBUG
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mSpansAllocated++;
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#endif
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*aResult = psd;
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return NS_OK;
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}
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nsresult
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nsLineLayout::BeginSpan(nsIFrame* aFrame,
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const nsHTMLReflowState* aSpanReflowState,
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nscoord aLeftEdge,
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nscoord aRightEdge)
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{
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#ifdef NOISY_REFLOW
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nsFrame::IndentBy(stdout, mSpanDepth+1);
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nsFrame::ListTag(stdout, aFrame);
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printf(": BeginSpan leftEdge=%d rightEdge=%d\n", aLeftEdge, aRightEdge);
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#endif
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PerSpanData* psd;
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nsresult rv = NewPerSpanData(&psd);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
// Link up span frame's pfd to point to its child span data
|
|
PerFrameData* pfd = mCurrentSpan->mLastFrame;
|
|
NS_ASSERTION(pfd->mFrame == aFrame, "huh?");
|
|
pfd->mSpan = psd;
|
|
|
|
// Init new span
|
|
psd->mFrame = pfd;
|
|
psd->mParent = mCurrentSpan;
|
|
psd->mReflowState = aSpanReflowState;
|
|
psd->mLeftEdge = aLeftEdge;
|
|
psd->mX = aLeftEdge;
|
|
psd->mRightEdge = aRightEdge;
|
|
psd->mZeroEffectiveSpanBox = PR_FALSE;
|
|
|
|
const nsStyleText* styleText;
|
|
aSpanReflowState->frame->GetStyleData(eStyleStruct_Text,
|
|
(const nsStyleStruct*&) styleText);
|
|
switch (styleText->mWhiteSpace) {
|
|
case NS_STYLE_WHITESPACE_PRE:
|
|
case NS_STYLE_WHITESPACE_NOWRAP:
|
|
psd->mNoWrap = PR_TRUE;
|
|
break;
|
|
default:
|
|
psd->mNoWrap = PR_FALSE;
|
|
break;
|
|
}
|
|
psd->mDirection = aSpanReflowState->mStyleDisplay->mDirection;
|
|
psd->mChangedFrameDirection = PR_FALSE;
|
|
|
|
// Switch to new span
|
|
mCurrentSpan = psd;
|
|
mSpanDepth++;
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
nsLineLayout::EndSpan(nsIFrame* aFrame,
|
|
nsSize& aSizeResult,
|
|
nsSize* aMaxElementSize)
|
|
{
|
|
NS_ASSERTION(mSpanDepth > 0, "end-span without begin-span");
|
|
#ifdef NOISY_REFLOW
|
|
nsFrame::IndentBy(stdout, mSpanDepth);
|
|
nsFrame::ListTag(stdout, aFrame);
|
|
printf(": EndSpan width=%d\n", mCurrentSpan->mX - mCurrentSpan->mLeftEdge);
|
|
#endif
|
|
PerSpanData* psd = mCurrentSpan;
|
|
nscoord width = 0;
|
|
nscoord maxHeight = 0;
|
|
nscoord maxElementWidth = 0;
|
|
nscoord maxElementHeight = 0;
|
|
if (nsnull != psd->mLastFrame) {
|
|
width = psd->mX - psd->mLeftEdge;
|
|
PerFrameData* pfd = psd->mFirstFrame;
|
|
while (nsnull != pfd) {
|
|
if (pfd->mBounds.height > maxHeight) maxHeight = pfd->mBounds.height;
|
|
|
|
// Compute max-element-size if necessary
|
|
if (aMaxElementSize) {
|
|
nscoord mw = pfd->mMaxElementSize.width +
|
|
pfd->mMargin.left + pfd->mMargin.right;
|
|
if (maxElementWidth < mw) {
|
|
maxElementWidth = mw;
|
|
}
|
|
nscoord mh = pfd->mMaxElementSize.height +
|
|
pfd->mMargin.top + pfd->mMargin.bottom;
|
|
if (maxElementHeight < mh) {
|
|
maxElementHeight = mh;
|
|
}
|
|
}
|
|
pfd = pfd->mNext;
|
|
}
|
|
}
|
|
aSizeResult.width = width;
|
|
aSizeResult.height = maxHeight;
|
|
if (aMaxElementSize) {
|
|
if (psd->mNoWrap) {
|
|
// When we have a non-breakable span, it's max-element-size
|
|
// width is its entire width.
|
|
aMaxElementSize->width = width;
|
|
aMaxElementSize->height = maxHeight;
|
|
}
|
|
else {
|
|
aMaxElementSize->width = maxElementWidth;
|
|
aMaxElementSize->height = maxElementHeight;
|
|
}
|
|
}
|
|
|
|
mSpanDepth--;
|
|
mCurrentSpan->mReflowState = nsnull; // no longer valid so null it out!
|
|
mCurrentSpan = mCurrentSpan->mParent;
|
|
}
|
|
|
|
PRInt32
|
|
nsLineLayout::GetCurrentSpanCount() const
|
|
{
|
|
NS_ASSERTION(mCurrentSpan == mRootSpan, "bad linelayout user");
|
|
PRInt32 count = 0;
|
|
PerFrameData* pfd = mRootSpan->mFirstFrame;
|
|
while (nsnull != pfd) {
|
|
count++;
|
|
pfd = pfd->mNext;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
void
|
|
nsLineLayout::SplitLineTo(PRInt32 aNewCount)
|
|
{
|
|
NS_ASSERTION(mCurrentSpan == mRootSpan, "bad linelayout user");
|
|
|
|
#ifdef REALLY_NOISY_PUSHING
|
|
printf("SplitLineTo %d (current count=%d); before:\n", aNewCount,
|
|
GetCurrentSpanCount());
|
|
DumpPerSpanData(mRootSpan, 1);
|
|
#endif
|
|
PerSpanData* psd = mRootSpan;
|
|
PerFrameData* pfd = psd->mFirstFrame;
|
|
while (nsnull != pfd) {
|
|
if (--aNewCount == 0) {
|
|
// Truncate list at pfd (we keep pfd, but anything following is freed)
|
|
PerFrameData* next = pfd->mNext;
|
|
pfd->mNext = nsnull;
|
|
psd->mLastFrame = pfd;
|
|
|
|
// Now release all of the frames following pfd
|
|
pfd = next;
|
|
while (nsnull != pfd) {
|
|
next = pfd->mNext;
|
|
pfd->mNext = mFrameFreeList;
|
|
mFrameFreeList = pfd;
|
|
#ifdef DEBUG
|
|
mFramesFreed++;
|
|
#endif
|
|
if (nsnull != pfd->mSpan) {
|
|
FreeSpan(pfd->mSpan);
|
|
}
|
|
pfd = next;
|
|
}
|
|
break;
|
|
}
|
|
pfd = pfd->mNext;
|
|
}
|
|
#ifdef NOISY_PUSHING
|
|
printf("SplitLineTo %d (current count=%d); after:\n", aNewCount,
|
|
GetCurrentSpanCount());
|
|
DumpPerSpanData(mRootSpan, 1);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
nsLineLayout::PushFrame(nsIFrame* aFrame)
|
|
{
|
|
PerSpanData* psd = mCurrentSpan;
|
|
NS_ASSERTION(psd->mLastFrame->mFrame == aFrame, "pushing non-last frame");
|
|
|
|
#ifdef REALLY_NOISY_PUSHING
|
|
nsFrame::IndentBy(stdout, mSpanDepth);
|
|
printf("PushFrame %p, before:\n", psd);
|
|
DumpPerSpanData(psd, 1);
|
|
#endif
|
|
|
|
// Take the last frame off of the span's frame list
|
|
PerFrameData* pfd = psd->mLastFrame;
|
|
if (pfd == psd->mFirstFrame) {
|
|
// We are pushing away the only frame...empty the list
|
|
psd->mFirstFrame = nsnull;
|
|
psd->mLastFrame = nsnull;
|
|
}
|
|
else {
|
|
PerFrameData* prevFrame = pfd->mPrev;
|
|
prevFrame->mNext = nsnull;
|
|
psd->mLastFrame = prevFrame;
|
|
}
|
|
|
|
// Now free it, and if it has a span, free that too
|
|
pfd->mNext = mFrameFreeList;
|
|
mFrameFreeList = pfd;
|
|
#ifdef DEBUG
|
|
mFramesFreed++;
|
|
#endif
|
|
if (nsnull != pfd->mSpan) {
|
|
FreeSpan(pfd->mSpan);
|
|
}
|
|
#ifdef NOISY_PUSHING
|
|
nsFrame::IndentBy(stdout, mSpanDepth);
|
|
printf("PushFrame: %p after:\n", psd);
|
|
DumpPerSpanData(psd, 1);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
nsLineLayout::FreeSpan(PerSpanData* psd)
|
|
{
|
|
// Free its frames
|
|
PerFrameData* pfd = psd->mFirstFrame;
|
|
while (nsnull != pfd) {
|
|
if (nsnull != pfd->mSpan) {
|
|
FreeSpan(pfd->mSpan);
|
|
}
|
|
PerFrameData* next = pfd->mNext;
|
|
pfd->mNext = mFrameFreeList;
|
|
mFrameFreeList = pfd;
|
|
#ifdef DEBUG
|
|
mFramesFreed++;
|
|
#endif
|
|
pfd = next;
|
|
}
|
|
|
|
// Now put the span on the free list since its free too
|
|
psd->mNextFreeSpan = mSpanFreeList;
|
|
mSpanFreeList = psd;
|
|
#ifdef DEBUG
|
|
mSpansFreed++;
|
|
#endif
|
|
}
|
|
|
|
PRBool
|
|
nsLineLayout::IsZeroHeight()
|
|
{
|
|
PerSpanData* psd = mCurrentSpan;
|
|
PerFrameData* pfd = psd->mFirstFrame;
|
|
while (nsnull != pfd) {
|
|
if (0 != pfd->mBounds.height) {
|
|
return PR_FALSE;
|
|
}
|
|
pfd = pfd->mNext;
|
|
}
|
|
return PR_TRUE;
|
|
}
|
|
|
|
nsresult
|
|
nsLineLayout::NewPerFrameData(PerFrameData** aResult)
|
|
{
|
|
PerFrameData* pfd = mFrameFreeList;
|
|
if (nsnull == pfd) {
|
|
if (mInitialFramesFreed < NS_LINELAYOUT_NUM_FRAMES) {
|
|
// use one of the ones defined in our struct...
|
|
pfd = &mFrameDataBuf[mInitialFramesFreed++];
|
|
}
|
|
else {
|
|
pfd = new PerFrameData;
|
|
if (nsnull == pfd) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
mFrameFreeList = pfd->mNext;
|
|
}
|
|
pfd->mSpan = nsnull;
|
|
pfd->mNext = nsnull;
|
|
pfd->mPrev = nsnull;
|
|
#ifdef DEBUG
|
|
pfd->mVerticalAlign = 0xFF;
|
|
pfd->mRelativePos = PRBool(0xFF);
|
|
mFramesAllocated++;
|
|
#endif
|
|
*aResult = pfd;
|
|
return NS_OK;
|
|
}
|
|
|
|
PRBool
|
|
nsLineLayout::CanPlaceFloaterNow() const
|
|
{
|
|
return mCanPlaceFloater;
|
|
}
|
|
|
|
PRBool
|
|
nsLineLayout::LineIsEmpty() const
|
|
{
|
|
return 0 == mTotalPlacedFrames;
|
|
}
|
|
|
|
PRBool
|
|
nsLineLayout::LineIsBreakable() const
|
|
{
|
|
if ((0 != mTotalPlacedFrames) || mImpactedByFloaters) {
|
|
return PR_TRUE;
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
nsresult
|
|
nsLineLayout::ReflowFrame(nsIFrame* aFrame,
|
|
nsIFrame** aNextRCFrame,
|
|
nsReflowStatus& aReflowStatus)
|
|
{
|
|
PerFrameData* pfd;
|
|
nsresult rv = NewPerFrameData(&pfd);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
PerSpanData* psd = mCurrentSpan;
|
|
psd->AppendFrame(pfd);
|
|
|
|
#ifdef REALLY_NOISY_REFLOW
|
|
nsFrame::IndentBy(stdout, mSpanDepth);
|
|
printf("%p: Begin ReflowFrame pfd=%p ", psd, pfd);
|
|
nsFrame::ListTag(stdout, aFrame);
|
|
printf("\n");
|
|
#endif
|
|
|
|
// Compute the available size for the frame. This available width
|
|
// includes room for the side margins and for the text-indent.
|
|
nsSize availSize;
|
|
if (NS_UNCONSTRAINEDSIZE == psd->mRightEdge) {
|
|
availSize.width = NS_UNCONSTRAINEDSIZE;
|
|
}
|
|
else {
|
|
availSize.width = psd->mRightEdge - psd->mX;
|
|
if (psd->mNoWrap) {
|
|
// Make up a width to use for reflowing into. XXX what value to
|
|
// use? for tables, we want to limit it; for other elements
|
|
// (e.g. text) it can be unlimited...
|
|
availSize.width = psd->mReflowState->availableWidth;
|
|
}
|
|
}
|
|
if (NS_UNCONSTRAINEDSIZE == mBottomEdge) {
|
|
availSize.height = NS_UNCONSTRAINEDSIZE;
|
|
}
|
|
else {
|
|
availSize.height = mBottomEdge - mTopEdge;
|
|
}
|
|
|
|
// Get reflow reason set correctly. It's possible that a child was
|
|
// created and then it was decided that it could not be reflowed
|
|
// (for example, a block frame that isn't at the start of a
|
|
// line). In this case the reason will be wrong so we need to check
|
|
// the frame state.
|
|
nsReflowReason reason = eReflowReason_Resize;
|
|
nsFrameState state;
|
|
aFrame->GetFrameState(&state);
|
|
if (NS_FRAME_FIRST_REFLOW & state) {
|
|
reason = eReflowReason_Initial;
|
|
}
|
|
else if (*aNextRCFrame == aFrame) {
|
|
reason = eReflowReason_Incremental;
|
|
// Make sure we only incrementally reflow once
|
|
*aNextRCFrame = nsnull;
|
|
}
|
|
else if (psd->mReflowState->reason == eReflowReason_StyleChange) {
|
|
reason = eReflowReason_StyleChange;
|
|
}
|
|
else {
|
|
const nsReflowState* rs = psd->mReflowState;
|
|
if (rs->reason == eReflowReason_Incremental) {
|
|
// If the incremental reflow command is a StyleChanged reflow and
|
|
// it's target is the current span, then make sure we send
|
|
// StyleChange reflow reasons down to the children so that they
|
|
// don't over-optimize their reflow.
|
|
nsIReflowCommand* rc = rs->reflowCommand;
|
|
if (rc) {
|
|
nsIReflowCommand::ReflowType type;
|
|
rc->GetType(type);
|
|
if (type == nsIReflowCommand::StyleChanged) {
|
|
nsIFrame* parentFrame = psd->mFrame
|
|
? psd->mFrame->mFrame
|
|
: mBlockReflowState->frame;
|
|
nsIFrame* target;
|
|
rc->GetTarget(target);
|
|
if (target == parentFrame) {
|
|
reason = eReflowReason_StyleChange;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Setup reflow state for reflowing the frame
|
|
nsHTMLReflowState reflowState(mPresContext, *psd->mReflowState, aFrame,
|
|
availSize, reason);
|
|
reflowState.mLineLayout = this;
|
|
reflowState.isTopOfPage = mIsTopOfPage;
|
|
mUnderstandsWhiteSpace = PR_FALSE;
|
|
|
|
// Stash copies of some of the computed state away for later
|
|
// (vertical alignment, for example)
|
|
pfd->mFrame = aFrame;
|
|
pfd->mMargin = reflowState.mComputedMargin;
|
|
pfd->mBorderPadding = reflowState.mComputedBorderPadding;
|
|
pfd->mFrameType = reflowState.mFrameType;
|
|
pfd->mRelativePos =
|
|
reflowState.mStylePosition->mPosition == NS_STYLE_POSITION_RELATIVE;
|
|
if (pfd->mRelativePos) {
|
|
pfd->mOffsets = reflowState.mComputedOffsets;
|
|
}
|
|
|
|
// We want to guarantee that we always make progress when
|
|
// formatting. Therefore, if the object being placed on the line is
|
|
// too big for the line, but it is the only thing on the line
|
|
// (including counting floaters) then we go ahead and place it
|
|
// anyway. Its also true that if the object is a part of a larger
|
|
// object (a multiple frame word) then we will place it on the line
|
|
// too.
|
|
//
|
|
// Capture this state *before* we reflow the frame in case it clears
|
|
// the state out. We need to know how to treat the current frame
|
|
// when breaking.
|
|
PRBool notSafeToBreak = CanPlaceFloaterNow() || InWord();
|
|
|
|
// Apply left margins (as appropriate) to the frame computing the
|
|
// new starting x,y coordinates for the frame.
|
|
ApplyLeftMargin(pfd, reflowState);
|
|
|
|
// Let frame know that are reflowing it
|
|
nscoord x = pfd->mBounds.x;
|
|
nscoord y = pfd->mBounds.y;
|
|
nsIHTMLReflow* htmlReflow;
|
|
|
|
aFrame->QueryInterface(kIHTMLReflowIID, (void**)&htmlReflow);
|
|
htmlReflow->WillReflow(mPresContext);
|
|
|
|
// Adjust spacemanager coordinate system for the frame. The
|
|
// spacemanager coordinates are <b>inside</b> the current spans
|
|
// border+padding, but the x/y coordinates are not (recall that
|
|
// frame coordinates are relative to the parents origin and that the
|
|
// parents border/padding is <b>inside</b> the parent
|
|
// frame. Therefore we have to subtract out the parents
|
|
// border+padding before translating.
|
|
nsSize innerMaxElementSize;
|
|
nsHTMLReflowMetrics metrics(mComputeMaxElementSize
|
|
? &innerMaxElementSize
|
|
: nsnull);
|
|
#ifdef DEBUG
|
|
metrics.width = nscoord(0xdeadbeef);
|
|
metrics.height = nscoord(0xdeadbeef);
|
|
metrics.ascent = nscoord(0xdeadbeef);
|
|
metrics.descent = nscoord(0xdeadbeef);
|
|
if (mComputeMaxElementSize) {
|
|
metrics.maxElementSize->width = nscoord(0xdeadbeef);
|
|
metrics.maxElementSize->height = nscoord(0xdeadbeef);
|
|
}
|
|
#endif
|
|
nscoord tx = x - psd->mReflowState->mComputedBorderPadding.left;
|
|
nscoord ty = y - psd->mReflowState->mComputedBorderPadding.top;
|
|
mSpaceManager->Translate(tx, ty);
|
|
htmlReflow->Reflow(mPresContext, metrics, reflowState, aReflowStatus);
|
|
|
|
// XXX See if the frame is a placeholderFrame and if it is process
|
|
// the floater.
|
|
nsIAtom* frameType;
|
|
aFrame->GetFrameType(&frameType);
|
|
pfd->mIsTextFrame = PR_FALSE;
|
|
pfd->mIsNonEmptyTextFrame = PR_FALSE;
|
|
if (frameType) {
|
|
if (frameType == nsLayoutAtoms::placeholderFrame) {
|
|
nsIFrame* outOfFlowFrame = ((nsPlaceholderFrame*)aFrame)->GetOutOfFlowFrame();
|
|
if (outOfFlowFrame) {
|
|
const nsStylePosition* position;
|
|
|
|
// Make sure it's floated and not absolutely positioned
|
|
outOfFlowFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)position);
|
|
if (!position->IsAbsolutelyPositioned()) {
|
|
if (eReflowReason_Incremental == reason) {
|
|
InitFloater((nsPlaceholderFrame*)aFrame);
|
|
}
|
|
else {
|
|
AddFloater((nsPlaceholderFrame*)aFrame);
|
|
}
|
|
nsIAtom* oofft;
|
|
outOfFlowFrame->GetFrameType(&oofft);
|
|
if (oofft) {
|
|
if (oofft == nsLayoutAtoms::letterFrame) {
|
|
mFirstLetterStyleOK = PR_FALSE;
|
|
}
|
|
NS_RELEASE(oofft);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else if (frameType == nsLayoutAtoms::textFrame) {
|
|
// Note non-empty text-frames for inline frame compatability hackery
|
|
pfd->mIsTextFrame = PR_TRUE;
|
|
if (metrics.width) {
|
|
pfd->mIsNonEmptyTextFrame = PR_TRUE;
|
|
}
|
|
}
|
|
NS_RELEASE(frameType);
|
|
}
|
|
|
|
mSpaceManager->Translate(-tx, -ty);
|
|
|
|
#ifdef DEBUG
|
|
// Note: break-before means ignore the reflow metrics since the
|
|
// frame will be reflowed another time.
|
|
if (!NS_INLINE_IS_BREAK_BEFORE(aReflowStatus)) {
|
|
if (CRAZY_WIDTH(metrics.width) || CRAZY_HEIGHT(metrics.height)) {
|
|
printf("nsLineLayout: ");
|
|
nsFrame::ListTag(stdout, aFrame);
|
|
printf(" metrics=%d,%d!\n", metrics.width, metrics.height);
|
|
}
|
|
if (mComputeMaxElementSize &&
|
|
((nscoord(0xdeadbeef) == metrics.maxElementSize->width) ||
|
|
(nscoord(0xdeadbeef) == metrics.maxElementSize->height))) {
|
|
printf("nsLineLayout: ");
|
|
nsFrame::ListTag(stdout, aFrame);
|
|
printf(" didn't set max-element-size!\n");
|
|
metrics.maxElementSize->width = 0;
|
|
metrics.maxElementSize->height = 0;
|
|
}
|
|
#ifdef REALLY_NOISY_MAX_ELEMENT_SIZE
|
|
// Note: there are common reflow situations where this *correctly*
|
|
// occurs; so only enable this debug noise when you really need to
|
|
// analyze in detail.
|
|
if (mComputeMaxElementSize &&
|
|
((metrics.maxElementSize->width > metrics.width) ||
|
|
(metrics.maxElementSize->height > metrics.height))) {
|
|
printf("nsLineLayout: ");
|
|
nsFrame::ListTag(stdout, aFrame);
|
|
printf(": WARNING: maxElementSize=%d,%d > metrics=%d,%d\n",
|
|
metrics.maxElementSize->width,
|
|
metrics.maxElementSize->height,
|
|
metrics.width, metrics.height);
|
|
}
|
|
#endif
|
|
if ((metrics.width == nscoord(0xdeadbeef)) ||
|
|
(metrics.height == nscoord(0xdeadbeef)) ||
|
|
(metrics.ascent == nscoord(0xdeadbeef)) ||
|
|
(metrics.descent == nscoord(0xdeadbeef))) {
|
|
printf("nsLineLayout: ");
|
|
nsFrame::ListTag(stdout, aFrame);
|
|
printf(" didn't set whad %d,%d,%d,%d!\n", metrics.width, metrics.height,
|
|
metrics.ascent, metrics.descent);
|
|
}
|
|
}
|
|
#endif
|
|
#ifdef NOISY_MAX_ELEMENT_SIZE
|
|
if (!NS_INLINE_IS_BREAK_BEFORE(aReflowStatus)) {
|
|
if (mComputeMaxElementSize) {
|
|
printf(" ");
|
|
nsFrame::ListTag(stdout, aFrame);
|
|
printf(": maxElementSize=%d,%d wh=%d,%d,\n",
|
|
metrics.maxElementSize->width,
|
|
metrics.maxElementSize->height,
|
|
metrics.width, metrics.height);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
aFrame->GetFrameState(&state);
|
|
if (NS_FRAME_OUTSIDE_CHILDREN & state) {
|
|
pfd->mCombinedArea = metrics.mCombinedArea;
|
|
}
|
|
else {
|
|
pfd->mCombinedArea.x = 0;
|
|
pfd->mCombinedArea.y = 0;
|
|
pfd->mCombinedArea.width = metrics.width;
|
|
pfd->mCombinedArea.height = metrics.height;
|
|
}
|
|
pfd->mBounds.width = metrics.width;
|
|
pfd->mBounds.height = metrics.height;
|
|
if (mComputeMaxElementSize) {
|
|
pfd->mMaxElementSize = *metrics.maxElementSize;
|
|
}
|
|
|
|
// Now that frame has been reflowed at least one time make sure that
|
|
// the NS_FRAME_FIRST_REFLOW bit is cleared so that never give it an
|
|
// initial reflow reason again.
|
|
if (eReflowReason_Initial == reason) {
|
|
aFrame->GetFrameState(&state);
|
|
aFrame->SetFrameState(state & ~NS_FRAME_FIRST_REFLOW);
|
|
}
|
|
|
|
if (!NS_INLINE_IS_BREAK_BEFORE(aReflowStatus)) {
|
|
// If frame is complete and has a next-in-flow, we need to delete
|
|
// them now. Do not do this when a break-before is signaled because
|
|
// the frame is going to get reflowed again (and may end up wanting
|
|
// a next-in-flow where it ends up).
|
|
if (NS_FRAME_IS_COMPLETE(aReflowStatus)) {
|
|
nsIFrame* kidNextInFlow;
|
|
aFrame->GetNextInFlow(&kidNextInFlow);
|
|
if (nsnull != kidNextInFlow) {
|
|
// Remove all of the childs next-in-flows. Make sure that we ask
|
|
// the right parent to do the removal (it's possible that the
|
|
// parent is not this because we are executing pullup code)
|
|
nsHTMLContainerFrame* parent;
|
|
aFrame->GetParent((nsIFrame**) &parent);
|
|
parent->DeleteChildsNextInFlow(mPresContext, aFrame);
|
|
}
|
|
}
|
|
|
|
// See if we can place the frame. If we can't fit it, then we
|
|
// return now.
|
|
if (CanPlaceFrame(pfd, reflowState, notSafeToBreak, metrics,
|
|
aReflowStatus)) {
|
|
// Place the frame, updating aBounds with the final size and
|
|
// location. Then apply the bottom+right margins (as
|
|
// appropriate) to the frame.
|
|
PlaceFrame(pfd, metrics);
|
|
PerSpanData* span = pfd->mSpan;
|
|
if (span) {
|
|
// The frame we just finished reflowing is an inline
|
|
// container. It needs its child frames vertically aligned,
|
|
// so do most of it now.
|
|
VerticalAlignFrames(span);
|
|
}
|
|
}
|
|
else {
|
|
PushFrame(aFrame);
|
|
}
|
|
}
|
|
else {
|
|
PushFrame(aFrame);
|
|
}
|
|
|
|
#ifdef REALLY_NOISY_REFLOW
|
|
nsFrame::IndentBy(stdout, mSpanDepth);
|
|
printf("End ReflowFrame ");
|
|
nsFrame::ListTag(stdout, aFrame);
|
|
printf(" status=%x\n", aReflowStatus);
|
|
#endif
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
nsLineLayout::ApplyLeftMargin(PerFrameData* pfd,
|
|
nsHTMLReflowState& aReflowState)
|
|
{
|
|
// If this is the first frame in the block, and its the first line
|
|
// of a block then see if the text-indent property amounts to
|
|
// anything.
|
|
nscoord indent = 0;
|
|
if (InBlockContext() && (0 == mLineNumber) && CanPlaceFloaterNow()) {
|
|
nsStyleUnit unit = mStyleText->mTextIndent.GetUnit();
|
|
if (eStyleUnit_Coord == unit) {
|
|
indent = mStyleText->mTextIndent.GetCoordValue();
|
|
}
|
|
else if (eStyleUnit_Percent == unit) {
|
|
nscoord width =
|
|
nsHTMLReflowState::GetContainingBlockContentWidth(mBlockReflowState->parentReflowState);
|
|
if (0 != width) {
|
|
indent = nscoord(mStyleText->mTextIndent.GetPercentValue() * width);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Adjust available width to account for the indent and the margins
|
|
aReflowState.availableWidth -= indent + pfd->mMargin.left +
|
|
pfd->mMargin.right;
|
|
|
|
// NOTE: While the x coordinate remains relative to the parent span,
|
|
// the y coordinate is fixed at the top edge for the line. During
|
|
// VerticalAlignFrames we will repair this so that the y coordinate
|
|
// is properly set and relative to the appropriate span.
|
|
PerSpanData* psd = mCurrentSpan;
|
|
pfd->mBounds.x = psd->mX + indent;
|
|
pfd->mBounds.y = mTopEdge;
|
|
|
|
// Compute left margin
|
|
nsIFrame* prevInFlow;
|
|
switch (aReflowState.mStyleDisplay->mFloats) {
|
|
default:
|
|
NS_NOTYETIMPLEMENTED("Unsupported floater type");
|
|
// FALL THROUGH
|
|
|
|
case NS_STYLE_FLOAT_LEFT:
|
|
case NS_STYLE_FLOAT_RIGHT:
|
|
// When something is floated, its margins are applied there
|
|
// not here.
|
|
break;
|
|
|
|
case NS_STYLE_FLOAT_NONE:
|
|
// Only apply left-margin on the first-in flow for inline frames
|
|
pfd->mFrame->GetPrevInFlow(&prevInFlow);
|
|
if (nsnull != prevInFlow) {
|
|
// Zero this out so that when we compute the max-element-size
|
|
// of the frame we will properly avoid adding in the left
|
|
// margin.
|
|
pfd->mMargin.left = 0;
|
|
}
|
|
pfd->mBounds.x += pfd->mMargin.left;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* See if the frame can be placed now that we know it's desired size.
|
|
* We can always place the frame if the line is empty. Note that we
|
|
* know that the reflow-status is not a break-before because if it was
|
|
* ReflowFrame above would have returned false, preventing this method
|
|
* from being called. The logic in this method assumes that.
|
|
*
|
|
* Note that there is no check against the Y coordinate because we
|
|
* assume that the caller will take care of that.
|
|
*/
|
|
PRBool
|
|
nsLineLayout::CanPlaceFrame(PerFrameData* pfd,
|
|
const nsHTMLReflowState& aReflowState,
|
|
PRBool aNotSafeToBreak,
|
|
nsHTMLReflowMetrics& aMetrics,
|
|
nsReflowStatus& aStatus)
|
|
{
|
|
// Compute right margin to use
|
|
nscoord rightMargin = 0;
|
|
if (0 != pfd->mBounds.width) {
|
|
switch (aReflowState.mStyleDisplay->mFloats) {
|
|
default:
|
|
NS_NOTYETIMPLEMENTED("Unsupported floater type");
|
|
// FALL THROUGH
|
|
|
|
case NS_STYLE_FLOAT_LEFT:
|
|
case NS_STYLE_FLOAT_RIGHT:
|
|
// When something is floated, its margins are applied there
|
|
// not here.
|
|
break;
|
|
|
|
case NS_STYLE_FLOAT_NONE:
|
|
// Only apply right margin for the last-in-flow
|
|
if (NS_FRAME_IS_NOT_COMPLETE(aStatus)) {
|
|
// Zero this out so that when we compute the
|
|
// max-element-size of the frame we will properly avoid
|
|
// adding in the right margin.
|
|
pfd->mMargin.right = 0;
|
|
}
|
|
rightMargin = pfd->mMargin.right;
|
|
break;
|
|
}
|
|
}
|
|
pfd->mMargin.right = rightMargin;
|
|
|
|
PerSpanData* psd = mCurrentSpan;
|
|
if (psd->mNoWrap) {
|
|
// When wrapping is off, everything fits
|
|
return PR_TRUE;
|
|
}
|
|
|
|
#ifdef NOISY_CAN_PLACE_FRAME
|
|
if (nsnull != psd->mFrame) {
|
|
nsFrame::ListTag(stdout, psd->mFrame->mFrame);
|
|
}
|
|
else {
|
|
nsFrame::ListTag(stdout, mBlockReflowState->frame);
|
|
}
|
|
printf(": aNotSafeToBreak=%s frame=", aNotSafeToBreak ? "true" : "false");
|
|
nsFrame::ListTag(stdout, pfd->mFrame);
|
|
printf(" frameWidth=%d\n", pfd->mBounds.XMost() + rightMargin - psd->mX);
|
|
#endif
|
|
|
|
// Set outside to PR_TRUE if the result of the reflow leads to the
|
|
// frame sticking outside of our available area.
|
|
PRBool outside = pfd->mBounds.XMost() + rightMargin > psd->mRightEdge;
|
|
if (!outside) {
|
|
// If it fits, it fits
|
|
#ifdef NOISY_CAN_PLACE_FRAME
|
|
printf(" ==> inside\n");
|
|
#endif
|
|
return PR_TRUE;
|
|
}
|
|
|
|
// When it doesn't fit, check for a few special conditions where we
|
|
// allow it to fit anyway.
|
|
if (0 == pfd->mMargin.left + pfd->mBounds.width + rightMargin) {
|
|
// Empty frames always fit right where they are
|
|
#ifdef NOISY_CAN_PLACE_FRAME
|
|
printf(" ==> empty frame fits\n");
|
|
#endif
|
|
return PR_TRUE;
|
|
}
|
|
|
|
if (aNotSafeToBreak) {
|
|
// There are no frames on the line or we are in the first word on
|
|
// the line. If the line isn't impacted by a floater then the
|
|
// current frame fits.
|
|
if (!mImpactedByFloaters) {
|
|
#ifdef NOISY_CAN_PLACE_FRAME
|
|
printf(" ==> not-safe and not-impacted fits: ");
|
|
PerSpanData* psd = mCurrentSpan;
|
|
while (nsnull != psd) {
|
|
printf("<psd=%p x=%d left=%d> ", psd, psd->mX, psd->mLeftEdge);
|
|
psd = psd->mParent;
|
|
}
|
|
printf("\n");
|
|
#endif
|
|
return PR_TRUE;
|
|
}
|
|
}
|
|
|
|
#ifdef NOISY_CAN_PLACE_FRAME
|
|
printf(" ==> didn't fit\n");
|
|
#endif
|
|
aStatus = NS_INLINE_LINE_BREAK_BEFORE();
|
|
return PR_FALSE;
|
|
}
|
|
|
|
/**
|
|
* Place the frame. Update running counters.
|
|
*/
|
|
void
|
|
nsLineLayout::PlaceFrame(PerFrameData* pfd, nsHTMLReflowMetrics& aMetrics)
|
|
{
|
|
// If frame is zero width then do not apply its left and right margins.
|
|
PerSpanData* psd = mCurrentSpan;
|
|
PRBool emptyFrame = PR_FALSE;
|
|
if ((0 == pfd->mBounds.width) && (0 == pfd->mBounds.height)) {
|
|
pfd->mBounds.x = psd->mX;
|
|
pfd->mBounds.y = mTopEdge;
|
|
emptyFrame = PR_TRUE;
|
|
}
|
|
|
|
// Record ascent and update max-ascent and max-descent values
|
|
pfd->mAscent = aMetrics.ascent;
|
|
pfd->mDescent = aMetrics.descent;
|
|
//XXX mCarriedOutTopMargin = aMetrics.mCarriedOutTopMargin;
|
|
mCarriedOutBottomMargin = aMetrics.mCarriedOutBottomMargin;
|
|
|
|
// If the band was updated during the reflow of that frame then we
|
|
// need to adjust any prior frames that were reflowed.
|
|
if (mUpdatedBand && InBlockContext()) {
|
|
UpdateFrames();
|
|
mUpdatedBand = PR_FALSE;
|
|
}
|
|
|
|
// Advance to next X coordinate
|
|
psd->mX = pfd->mBounds.XMost() + pfd->mMargin.right;
|
|
|
|
// If the frame is a not aware of white-space and it takes up some
|
|
// width, disable leading white-space compression for the next frame
|
|
// to be reflowed.
|
|
if (!mUnderstandsWhiteSpace && pfd->mBounds.width) {
|
|
mEndsInWhiteSpace = PR_FALSE;
|
|
}
|
|
|
|
// Count the number of frames on the line...
|
|
mTotalPlacedFrames++;
|
|
if (psd->mX != psd->mLeftEdge) {
|
|
// As soon as a frame placed on the line advances an X coordinate
|
|
// of any span we can no longer place a floater on the line.
|
|
mCanPlaceFloater = PR_FALSE;
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
nsLineLayout::AddBulletFrame(nsIFrame* aFrame,
|
|
const nsHTMLReflowMetrics& aMetrics)
|
|
{
|
|
NS_ASSERTION(mCurrentSpan == mRootSpan, "bad linelayout user");
|
|
|
|
PerFrameData* pfd;
|
|
nsresult rv = NewPerFrameData(&pfd);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
mRootSpan->AppendFrame(pfd);
|
|
pfd->mFrame = aFrame;
|
|
pfd->mMargin.SizeTo(0, 0, 0, 0);
|
|
pfd->mBorderPadding.SizeTo(0, 0, 0, 0);
|
|
pfd->mFrameType = NS_CSS_FRAME_TYPE_INLINE|NS_FRAME_REPLACED_ELEMENT;
|
|
pfd->mRelativePos = PR_FALSE;
|
|
pfd->mAscent = aMetrics.ascent;
|
|
pfd->mDescent = aMetrics.descent;
|
|
pfd->mIsTextFrame = PR_FALSE;
|
|
pfd->mIsNonEmptyTextFrame = PR_FALSE;
|
|
|
|
// Note: y value will be updated during vertical alignment
|
|
aFrame->GetRect(pfd->mBounds);
|
|
pfd->mCombinedArea = aMetrics.mCombinedArea;
|
|
if (mComputeMaxElementSize) {
|
|
pfd->mMaxElementSize.SizeTo(aMetrics.width, aMetrics.height);
|
|
}
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
void
|
|
nsLineLayout::DumpPerSpanData(PerSpanData* psd, PRInt32 aIndent)
|
|
{
|
|
nsFrame::IndentBy(stdout, aIndent);
|
|
printf("%p: left=%d x=%d right=%d\n", psd, psd->mLeftEdge,
|
|
psd->mX, psd->mRightEdge);
|
|
PerFrameData* pfd = psd->mFirstFrame;
|
|
while (nsnull != pfd) {
|
|
nsFrame::IndentBy(stdout, aIndent+1);
|
|
nsFrame::ListTag(stdout, pfd->mFrame);
|
|
printf(" %d,%d,%d,%d\n", pfd->mBounds.x, pfd->mBounds.y,
|
|
pfd->mBounds.width, pfd->mBounds.height);
|
|
if (pfd->mSpan) {
|
|
DumpPerSpanData(pfd->mSpan, aIndent + 1);
|
|
}
|
|
pfd = pfd->mNext;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#define VALIGN_OTHER 0
|
|
#define VALIGN_TOP 1
|
|
#define VALIGN_BOTTOM 2
|
|
|
|
void
|
|
nsLineLayout::VerticalAlignFrames(nsRect& aLineBoxResult,
|
|
nsSize& aMaxElementSizeResult)
|
|
{
|
|
// Synthesize a PerFrameData for the block frame
|
|
PerFrameData rootPFD;
|
|
rootPFD.mFrame = mBlockReflowState->frame;
|
|
rootPFD.mFrameType = mBlockReflowState->mFrameType;
|
|
rootPFD.mAscent = 0;
|
|
rootPFD.mDescent = 0;
|
|
mRootSpan->mFrame = &rootPFD;
|
|
|
|
// Partially place the children of the block frame. The baseline for
|
|
// this operation is set to zero so that the y coordinates for all
|
|
// of the placed children will be relative to there.
|
|
PerSpanData* psd = mRootSpan;
|
|
VerticalAlignFrames(psd);
|
|
|
|
// Compute the line-height. The line-height will be the larger of:
|
|
//
|
|
// [1] maxY - minY (the distance between the highest childs top edge
|
|
// and the lowest childs bottom edge)
|
|
//
|
|
// [2] the maximum logical box height (since not every frame may have
|
|
// participated in #1; for example: top/bottom aligned frames)
|
|
//
|
|
// [3] the minimum line height (line-height property set on the
|
|
// block frame)
|
|
nscoord lineHeight = psd->mMaxY - psd->mMinY;
|
|
|
|
// Now that the line-height is computed, we need to know where the
|
|
// baseline is in the line. Position baseline so that mMinY is just
|
|
// inside the top of the line box.
|
|
nscoord baselineY;
|
|
if (psd->mMinY < 0) {
|
|
baselineY = mTopEdge - psd->mMinY;
|
|
}
|
|
else {
|
|
baselineY = mTopEdge;
|
|
}
|
|
|
|
// It's possible that the line-height isn't tall enough because of
|
|
// the blocks minimum line-height.
|
|
if (!psd->mZeroEffectiveSpanBox) {
|
|
if (0 != lineHeight) {
|
|
// If line contains nothing but empty boxes that have no height
|
|
// then don't apply the min-line-height.
|
|
//
|
|
// Note: This is how we hide lines that contain nothing but
|
|
// compressed whitespace.
|
|
if (lineHeight < mMinLineHeight) {
|
|
// Apply half of the extra space to the top of the line as top
|
|
// leading
|
|
nscoord extra = mMinLineHeight - lineHeight;
|
|
baselineY += extra / 2;
|
|
lineHeight = mMinLineHeight;
|
|
}
|
|
}
|
|
}
|
|
|
|
// It's also possible that the line-height isn't tall enough because
|
|
// of top/bottom aligned elements that were not accounted for in
|
|
// min/max Y.
|
|
//
|
|
// The CSS2 spec doesn't really say what happens when to the
|
|
// baseline in this situations. What we do is if the largest top
|
|
// aligned box height is greater than the line-height then we leave
|
|
// the baseline alone. If the largest bottom aligned box is greater
|
|
// than the line-height then we slide the baseline down by the extra
|
|
// amount.
|
|
//
|
|
// Navigator 4 gives precedence to the first top/bottom aligned
|
|
// object. We just let bottom aligned objects win.
|
|
if (lineHeight < mMaxBottomBoxHeight) {
|
|
// When the line is shorter than the maximum top aligned box
|
|
nscoord extra = mMaxBottomBoxHeight - lineHeight;
|
|
baselineY += extra;
|
|
lineHeight = mMaxBottomBoxHeight;
|
|
}
|
|
if (lineHeight < mMaxTopBoxHeight) {
|
|
lineHeight = mMaxTopBoxHeight;
|
|
}
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
printf(" ==> lineHeight=%d baselineY=%d\n", lineHeight, baselineY);
|
|
#endif
|
|
|
|
// Now position all of the frames in the root span. We will also
|
|
// recurse over the child spans and place any top/bottom aligned
|
|
// frames we find.
|
|
// XXX PERFORMANCE: set a bit per-span to avoid the extra work
|
|
// (propogate it upward too)
|
|
PerFrameData* pfd = psd->mFirstFrame;
|
|
nscoord maxElementWidth = 0;
|
|
nscoord maxElementHeight = 0;
|
|
while (nsnull != pfd) {
|
|
// Compute max-element-size if necessary
|
|
if (mComputeMaxElementSize) {
|
|
nscoord mw = pfd->mMaxElementSize.width +
|
|
pfd->mMargin.left + pfd->mMargin.right;
|
|
if (maxElementWidth < mw) {
|
|
maxElementWidth = mw;
|
|
}
|
|
nscoord mh = pfd->mMaxElementSize.height +
|
|
pfd->mMargin.top + pfd->mMargin.bottom;
|
|
if (maxElementHeight < mh) {
|
|
maxElementHeight = mh;
|
|
}
|
|
}
|
|
PerSpanData* span = pfd->mSpan;
|
|
#ifdef DEBUG
|
|
NS_ASSERTION(0xFF != pfd->mVerticalAlign, "umr");
|
|
#endif
|
|
switch (pfd->mVerticalAlign) {
|
|
case VALIGN_TOP:
|
|
if (span) {
|
|
pfd->mBounds.y = mTopEdge - pfd->mBorderPadding.top +
|
|
span->mTopLeading;
|
|
}
|
|
else {
|
|
pfd->mBounds.y = mTopEdge + pfd->mMargin.top;
|
|
}
|
|
break;
|
|
case VALIGN_BOTTOM:
|
|
if (span) {
|
|
// Compute bottom leading
|
|
pfd->mBounds.y = mTopEdge + lineHeight -
|
|
pfd->mBounds.height + pfd->mBorderPadding.bottom -
|
|
span->mBottomLeading;
|
|
}
|
|
else {
|
|
pfd->mBounds.y = mTopEdge + lineHeight - pfd->mMargin.bottom -
|
|
pfd->mBounds.height;
|
|
}
|
|
break;
|
|
case VALIGN_OTHER:
|
|
pfd->mBounds.y += baselineY;
|
|
break;
|
|
}
|
|
pfd->mFrame->SetRect(pfd->mBounds);
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
printf(" ");
|
|
nsFrame::ListTag(stdout, pfd->mFrame);
|
|
printf(": y=%d\n", pfd->mBounds.y);
|
|
#endif
|
|
if (span) {
|
|
nscoord distanceFromTop = pfd->mBounds.y - mTopEdge;
|
|
PlaceTopBottomFrames(span, distanceFromTop, lineHeight);
|
|
}
|
|
pfd = pfd->mNext;
|
|
}
|
|
|
|
// Fill in returned line-box and max-element-size data
|
|
aLineBoxResult.x = psd->mLeftEdge;
|
|
aLineBoxResult.y = mTopEdge;
|
|
aLineBoxResult.width = psd->mX - psd->mLeftEdge;
|
|
aLineBoxResult.height = lineHeight;
|
|
mFinalLineHeight = lineHeight;
|
|
aMaxElementSizeResult.width = maxElementWidth;
|
|
aMaxElementSizeResult.height = maxElementHeight;
|
|
|
|
// Undo root-span mFrame pointer to prevent brane damage later on...
|
|
mRootSpan->mFrame = nsnull;
|
|
}
|
|
|
|
void
|
|
nsLineLayout::PlaceTopBottomFrames(PerSpanData* psd,
|
|
nscoord aDistanceFromTop,
|
|
nscoord aLineHeight)
|
|
{
|
|
PerFrameData* pfd = psd->mFirstFrame;
|
|
while (nsnull != pfd) {
|
|
PerSpanData* span = pfd->mSpan;
|
|
#ifdef DEBUG
|
|
NS_ASSERTION(0xFF != pfd->mVerticalAlign, "umr");
|
|
#endif
|
|
switch (pfd->mVerticalAlign) {
|
|
case VALIGN_TOP:
|
|
if (span) {
|
|
pfd->mBounds.y = -aDistanceFromTop - pfd->mBorderPadding.top +
|
|
span->mTopLeading;
|
|
}
|
|
else {
|
|
pfd->mBounds.y = -aDistanceFromTop + pfd->mMargin.top;
|
|
}
|
|
pfd->mFrame->SetRect(pfd->mBounds);
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
printf(" ");
|
|
nsFrame::ListTag(stdout, pfd->mFrame);
|
|
printf(": y=%d dTop=%d [bp.top=%d topLeading=%d]\n",
|
|
pfd->mBounds.y, aDistanceFromTop,
|
|
span ? pfd->mBorderPadding.top : 0,
|
|
span ? span->mTopLeading : 0);
|
|
#endif
|
|
break;
|
|
case VALIGN_BOTTOM:
|
|
if (span) {
|
|
// Compute bottom leading
|
|
pfd->mBounds.y = -aDistanceFromTop + aLineHeight -
|
|
pfd->mBounds.height + pfd->mBorderPadding.bottom -
|
|
span->mBottomLeading;
|
|
}
|
|
else {
|
|
pfd->mBounds.y = -aDistanceFromTop + aLineHeight -
|
|
pfd->mMargin.bottom - pfd->mBounds.height;
|
|
}
|
|
pfd->mFrame->SetRect(pfd->mBounds);
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
printf(" ");
|
|
nsFrame::ListTag(stdout, pfd->mFrame);
|
|
printf(": y=%d\n", pfd->mBounds.y);
|
|
#endif
|
|
break;
|
|
}
|
|
if (span) {
|
|
nscoord distanceFromTop = aDistanceFromTop + pfd->mBounds.y;
|
|
PlaceTopBottomFrames(span, distanceFromTop, aLineHeight);
|
|
}
|
|
pfd = pfd->mNext;
|
|
}
|
|
}
|
|
|
|
// Vertically place frames within a given span. Note: this doesn't
|
|
// place top/bottom aligned frames as those have to wait until the
|
|
// entire line box height is known. This is called after the span
|
|
// frame has finished being reflowed so that we know its height.
|
|
void
|
|
nsLineLayout::VerticalAlignFrames(PerSpanData* psd)
|
|
{
|
|
// Get parent frame info
|
|
PerFrameData* parentPFD = psd->mFrame;
|
|
nsIFrame* parentFrame = parentPFD->mFrame;
|
|
|
|
// Get the parent frame's font for all of the frames in this span
|
|
const nsStyleFont* parentFont;
|
|
parentFrame->GetStyleData(eStyleStruct_Font,
|
|
(const nsStyleStruct*&)parentFont);
|
|
nsIRenderingContext* rc = mBlockReflowState->rendContext;
|
|
rc->SetFont(parentFont->mFont);
|
|
nsCOMPtr<nsIFontMetrics> fm;
|
|
rc->GetFontMetrics(*getter_AddRefs(fm));
|
|
|
|
// Compute the span's mZeroEffectiveSpanBox flag. Pre-mode shuts
|
|
// down most of this behavior.
|
|
PRBool zeroEffectiveSpanBox = PR_FALSE;
|
|
PRBool preMode = (mStyleText->mWhiteSpace == NS_STYLE_WHITESPACE_PRE) ||
|
|
(mStyleText->mWhiteSpace == NS_STYLE_WHITESPACE_MOZ_PRE_WRAP);
|
|
if (!preMode && !InStrictMode() &&
|
|
((psd == mRootSpan) ||
|
|
((0 == parentPFD->mBorderPadding.top) &&
|
|
(0 == parentPFD->mBorderPadding.right) &&
|
|
(0 == parentPFD->mBorderPadding.bottom) &&
|
|
(0 == parentPFD->mBorderPadding.left) &&
|
|
(0 == parentPFD->mMargin.top) &&
|
|
(0 == parentPFD->mMargin.right) &&
|
|
(0 == parentPFD->mMargin.bottom) &&
|
|
(0 == parentPFD->mMargin.left)))) {
|
|
// This code handles an issue with compatability with non-css
|
|
// conformant browsers. In particular, there are some cases
|
|
// where the font-size and line-height for a span must be
|
|
// ignored and instead the span must *act* as if it were zero
|
|
// sized. In general, if the span contains any non-compressed
|
|
// text or contains another span which contains non-compressed
|
|
// text, then we don't use this logic.
|
|
zeroEffectiveSpanBox = PR_TRUE;
|
|
PerFrameData* pfd = psd->mFirstFrame;
|
|
while (nsnull != pfd) {
|
|
if (pfd->mIsNonEmptyTextFrame) {
|
|
zeroEffectiveSpanBox = PR_FALSE;
|
|
break;
|
|
}
|
|
PerSpanData* frameSpan = pfd->mSpan;
|
|
if (frameSpan) {
|
|
if (!frameSpan->mZeroEffectiveSpanBox) {
|
|
// Propogate prescence of non-empty text outward
|
|
zeroEffectiveSpanBox = PR_FALSE;
|
|
break;
|
|
}
|
|
}
|
|
pfd = pfd->mNext;
|
|
}
|
|
}
|
|
psd->mZeroEffectiveSpanBox = zeroEffectiveSpanBox;
|
|
|
|
// Setup baselineY, minY, and maxY
|
|
nscoord baselineY, minY, maxY;
|
|
if (psd == mRootSpan) {
|
|
// Use a zero baselineY since we don't yet know where the baseline
|
|
// will be (until we know how tall the line is; then we will
|
|
// know). In addition, use extreme values for the minY and maxY
|
|
// values so that only the child frames will impact their values
|
|
// (since these are children of the block, there is no span box to
|
|
// provide initial values).
|
|
baselineY = minY = maxY = 0;
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
nsFrame::ListTag(stdout, parentFrame);
|
|
printf(": pass1 valign frames: topEdge=%d minLineHeight=%d zeroEffectiveSpanBox=%s\n",
|
|
mTopEdge, mMinLineHeight,
|
|
zeroEffectiveSpanBox ? "yes" : "no");
|
|
#endif
|
|
}
|
|
else {
|
|
if (zeroEffectiveSpanBox) {
|
|
// When the span-box is to be ignored, zero out all the initial
|
|
// values so that the span doesn't impact the final line
|
|
// height. The contents of the span can impact the final line
|
|
// height.
|
|
psd->mTopLeading = 0;
|
|
psd->mBottomLeading = 0;
|
|
psd->mLogicalHeight = 0;
|
|
parentPFD->mAscent = 0;
|
|
parentPFD->mBounds.height = 0;
|
|
baselineY = minY = maxY = 0;
|
|
}
|
|
else {
|
|
// Compute the logical height for this span. The logical height
|
|
// is based on the line-height value, not the font-size. Also
|
|
// compute the top leading.
|
|
nscoord logicalHeight =
|
|
nsHTMLReflowState::CalcLineHeight(mPresContext, rc, parentFrame);
|
|
nscoord contentHeight = parentPFD->mBounds.height -
|
|
parentPFD->mBorderPadding.top - parentPFD->mBorderPadding.bottom;
|
|
nscoord leading = logicalHeight - contentHeight;
|
|
psd->mTopLeading = leading / 2;
|
|
psd->mBottomLeading = leading - psd->mTopLeading;
|
|
psd->mLogicalHeight = logicalHeight;
|
|
|
|
// The initial values for the min and max Y values are in the spans
|
|
// coordinate space, and cover the logical height of the span. If
|
|
// there are child frames in this span that stick out of this area
|
|
// then the minY and maxY are updated by the amount of logical
|
|
// height that is outside this range.
|
|
minY = parentPFD->mBorderPadding.top - psd->mTopLeading;
|
|
maxY = minY + psd->mLogicalHeight;
|
|
|
|
// This is the distance from the top edge of the parents visual
|
|
// box to the baseline. The span already computed this for us,
|
|
// so just use it.
|
|
baselineY = parentPFD->mAscent;
|
|
}
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
nsFrame::ListTag(stdout, parentFrame);
|
|
printf(": baseLine=%d logicalHeight=%d topLeading=%d h=%d bp=%d,%d zeroEffectiveSpanBox=%s\n",
|
|
baselineY, psd->mLogicalHeight, psd->mTopLeading,
|
|
parentPFD->mBounds.height,
|
|
parentPFD->mBorderPadding.top, parentPFD->mBorderPadding.bottom,
|
|
zeroEffectiveSpanBox ? "yes" : "no");
|
|
#endif
|
|
}
|
|
|
|
nscoord maxTopBoxHeight = 0;
|
|
nscoord maxBottomBoxHeight = 0;
|
|
PerFrameData* pfd = psd->mFirstFrame;
|
|
while (nsnull != pfd) {
|
|
nsIFrame* frame = pfd->mFrame;
|
|
|
|
// Compute the logical height of the frame
|
|
nscoord logicalHeight;
|
|
nscoord topLeading;
|
|
PerSpanData* frameSpan = pfd->mSpan;
|
|
if (frameSpan) {
|
|
// For span frames the logical-height and top-leading was
|
|
// pre-computed when the span was reflowed.
|
|
logicalHeight = frameSpan->mLogicalHeight;
|
|
topLeading = frameSpan->mTopLeading;
|
|
}
|
|
else {
|
|
// For other elements the logical height is the same as the
|
|
// frames height plus its margins.
|
|
logicalHeight = pfd->mBounds.height + pfd->mMargin.top +
|
|
pfd->mMargin.bottom;
|
|
topLeading = 0;
|
|
}
|
|
|
|
// Get vertical-align property
|
|
const nsStyleText* textStyle;
|
|
frame->GetStyleData(eStyleStruct_Text, (const nsStyleStruct*&)textStyle);
|
|
nsStyleUnit verticalAlignUnit = textStyle->mVerticalAlign.GetUnit();
|
|
if (eStyleUnit_Inherit == verticalAlignUnit) {
|
|
printf("XXX: vertical-align: inherit not implemented for ");
|
|
nsFrame::ListTag(stdout, frame);
|
|
printf("\n");
|
|
}
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
printf(" ");
|
|
nsFrame::ListTag(stdout, frame);
|
|
printf(": verticalAlignUnit=%d (enum == %d)\n",
|
|
verticalAlignUnit,
|
|
((eStyleUnit_Enumerated == verticalAlignUnit)
|
|
? textStyle->mVerticalAlign.GetIntValue()
|
|
: -1));
|
|
#endif
|
|
|
|
PRUint8 verticalAlignEnum;
|
|
nscoord parentAscent, parentDescent, parentXHeight;
|
|
nscoord parentSuperscript, parentSubscript;
|
|
nscoord coordOffset, percentOffset, elementLineHeight;
|
|
nscoord revisedBaselineY;
|
|
switch (verticalAlignUnit) {
|
|
case eStyleUnit_Enumerated:
|
|
default:
|
|
if (eStyleUnit_Enumerated == verticalAlignUnit) {
|
|
verticalAlignEnum = textStyle->mVerticalAlign.GetIntValue();
|
|
}
|
|
else {
|
|
verticalAlignEnum = NS_STYLE_VERTICAL_ALIGN_BASELINE;
|
|
}
|
|
switch (verticalAlignEnum) {
|
|
default:
|
|
case NS_STYLE_VERTICAL_ALIGN_BASELINE:
|
|
// The elements baseline is aligned with the baseline of
|
|
// the parent.
|
|
if (frameSpan) {
|
|
// XXX explain
|
|
pfd->mBounds.y = baselineY - pfd->mAscent;
|
|
}
|
|
else {
|
|
// For non-span elements the borders, padding and
|
|
// margins are significant. Use the visual box height
|
|
// and the bottom margin as the distance off of the
|
|
// baseline.
|
|
pfd->mBounds.y = baselineY - pfd->mAscent - pfd->mMargin.bottom;
|
|
}
|
|
pfd->mVerticalAlign = VALIGN_OTHER;
|
|
break;
|
|
|
|
case NS_STYLE_VERTICAL_ALIGN_SUB:
|
|
// Lower the baseline of the box to the subscript offset
|
|
// of the parent's box. This is identical to the baseline
|
|
// alignment except for the addition of the subscript
|
|
// offset to the baseline Y.
|
|
fm->GetSubscriptOffset(parentSubscript);
|
|
revisedBaselineY = baselineY + parentSubscript;
|
|
if (frameSpan) {
|
|
pfd->mBounds.y = revisedBaselineY - pfd->mAscent;
|
|
}
|
|
else {
|
|
pfd->mBounds.y = revisedBaselineY - pfd->mAscent -
|
|
pfd->mMargin.bottom;
|
|
}
|
|
pfd->mVerticalAlign = VALIGN_OTHER;
|
|
break;
|
|
|
|
case NS_STYLE_VERTICAL_ALIGN_SUPER:
|
|
// Raise the baseline of the box to the superscript offset
|
|
// of the parent's box. This is identical to the baseline
|
|
// alignment except for the subtraction of the superscript
|
|
// offset to the baseline Y.
|
|
fm->GetSuperscriptOffset(parentSuperscript);
|
|
revisedBaselineY = baselineY - parentSuperscript;
|
|
if (frameSpan) {
|
|
pfd->mBounds.y = revisedBaselineY - pfd->mAscent;
|
|
}
|
|
else {
|
|
pfd->mBounds.y = revisedBaselineY - pfd->mAscent -
|
|
pfd->mMargin.bottom;
|
|
}
|
|
pfd->mVerticalAlign = VALIGN_OTHER;
|
|
break;
|
|
|
|
case NS_STYLE_VERTICAL_ALIGN_TOP:
|
|
pfd->mVerticalAlign = VALIGN_TOP;
|
|
if (logicalHeight > maxTopBoxHeight) {
|
|
maxTopBoxHeight = logicalHeight;
|
|
}
|
|
break;
|
|
|
|
case NS_STYLE_VERTICAL_ALIGN_BOTTOM:
|
|
pfd->mVerticalAlign = VALIGN_BOTTOM;
|
|
if (logicalHeight > maxBottomBoxHeight) {
|
|
maxBottomBoxHeight = logicalHeight;
|
|
}
|
|
break;
|
|
|
|
case NS_STYLE_VERTICAL_ALIGN_MIDDLE:
|
|
// Align the midpoint of the frame with 1/2 the parents
|
|
// x-height above the baseline.
|
|
fm->GetXHeight(parentXHeight);
|
|
if (frameSpan) {
|
|
pfd->mBounds.y = baselineY -
|
|
(parentXHeight + pfd->mBounds.height)/2;
|
|
}
|
|
else {
|
|
pfd->mBounds.y = baselineY - (parentXHeight + logicalHeight)/2 +
|
|
pfd->mMargin.top;
|
|
}
|
|
pfd->mVerticalAlign = VALIGN_OTHER;
|
|
break;
|
|
|
|
case NS_STYLE_VERTICAL_ALIGN_TEXT_TOP:
|
|
// The top of the logical box is aligned with the top of
|
|
// the parent elements text.
|
|
fm->GetMaxAscent(parentAscent);
|
|
if (frameSpan) {
|
|
pfd->mBounds.y = baselineY - parentAscent -
|
|
pfd->mBorderPadding.top + frameSpan->mTopLeading;
|
|
}
|
|
else {
|
|
pfd->mBounds.y = baselineY - parentAscent + pfd->mMargin.top;
|
|
}
|
|
pfd->mVerticalAlign = VALIGN_OTHER;
|
|
break;
|
|
|
|
case NS_STYLE_VERTICAL_ALIGN_TEXT_BOTTOM:
|
|
// The bottom of the logical box is aligned with the
|
|
// bottom of the parent elements text.
|
|
fm->GetMaxDescent(parentDescent);
|
|
if (frameSpan) {
|
|
pfd->mBounds.y = baselineY + parentDescent -
|
|
pfd->mBounds.height + pfd->mBorderPadding.bottom -
|
|
frameSpan->mBottomLeading;
|
|
}
|
|
else {
|
|
pfd->mBounds.y = baselineY + parentDescent -
|
|
pfd->mBounds.height - pfd->mMargin.bottom;
|
|
}
|
|
pfd->mVerticalAlign = VALIGN_OTHER;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case eStyleUnit_Coord:
|
|
// According to the CSS2 spec (10.8.1), a positive value
|
|
// "raises" the box by the given distance while a negative value
|
|
// "lowers" the box by the given distance (with zero being the
|
|
// baseline). Since Y coordinates increase towards the bottom of
|
|
// the screen we reverse the sign.
|
|
coordOffset = textStyle->mVerticalAlign.GetCoordValue();
|
|
revisedBaselineY = baselineY - coordOffset;
|
|
if (frameSpan) {
|
|
pfd->mBounds.y = revisedBaselineY - pfd->mAscent;
|
|
}
|
|
else {
|
|
pfd->mBounds.y = revisedBaselineY - pfd->mAscent -
|
|
pfd->mMargin.bottom;
|
|
}
|
|
pfd->mVerticalAlign = VALIGN_OTHER;
|
|
break;
|
|
|
|
case eStyleUnit_Percent:
|
|
// Similar to a length value (eStyleUnit_Coord) except that the
|
|
// percentage is a function of the elements line-height value.
|
|
elementLineHeight =
|
|
nsHTMLReflowState::CalcLineHeight(mPresContext, rc, frame);
|
|
percentOffset = nscoord(
|
|
textStyle->mVerticalAlign.GetPercentValue() * elementLineHeight
|
|
);
|
|
revisedBaselineY = baselineY - percentOffset;
|
|
if (frameSpan) {
|
|
pfd->mBounds.y = revisedBaselineY - pfd->mAscent;
|
|
}
|
|
else {
|
|
pfd->mBounds.y = revisedBaselineY - pfd->mAscent -
|
|
pfd->mMargin.bottom;
|
|
}
|
|
pfd->mVerticalAlign = VALIGN_OTHER;
|
|
break;
|
|
}
|
|
|
|
// Update minY/maxY for frames that we just placed. Do not factor
|
|
// text into the equation.
|
|
if (pfd->mVerticalAlign == VALIGN_OTHER) {
|
|
// Text frames do not contribute to the min/max Y values for the
|
|
// line (instead their parent frame's font-size contributes).
|
|
if (!pfd->mIsTextFrame) {
|
|
nscoord yTop, yBottom;
|
|
if (frameSpan) {
|
|
// For spans that were are now placing, use their position
|
|
// plus their already computed min-Y and max-Y values for
|
|
// computing yTop and yBottom.
|
|
yTop = pfd->mBounds.y + frameSpan->mMinY;
|
|
yBottom = pfd->mBounds.y + frameSpan->mMaxY;
|
|
}
|
|
else {
|
|
yTop = pfd->mBounds.y - pfd->mMargin.top;
|
|
yBottom = yTop + logicalHeight;
|
|
}
|
|
if (yTop < minY) minY = yTop;
|
|
if (yBottom > maxY) maxY = yBottom;
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
printf(" raw: a=%d d=%d h=%d bp=%d,%d logical: h=%d leading=%d y=%d minY=%d maxY=%d\n",
|
|
pfd->mAscent, pfd->mDescent, pfd->mBounds.height,
|
|
pfd->mBorderPadding.top, pfd->mBorderPadding.bottom,
|
|
logicalHeight,
|
|
pfd->mSpan ? topLeading : 0,
|
|
pfd->mBounds.y, minY, maxY);
|
|
#endif
|
|
}
|
|
if (psd != mRootSpan) {
|
|
frame->SetRect(pfd->mBounds);
|
|
}
|
|
}
|
|
pfd = pfd->mNext;
|
|
}
|
|
|
|
// Factor in the minimum line-height when handling the root-span for
|
|
// the block.
|
|
if (psd == mRootSpan) {
|
|
// If this span's width is non-zero then it can't possibly be a
|
|
// line that contains nothing but zero width items. Therefore we
|
|
// should factor in the block element's minimum line-height (as
|
|
// defined in section 10.8.1 of the css2 spec).
|
|
if (psd->mZeroEffectiveSpanBox) {
|
|
// Leave minY/maxY values untouched
|
|
}
|
|
else {
|
|
if ((psd->mX != psd->mLeftEdge) || preMode) {
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
printf(" ==> adjusting min/maxY: currentValues: %d,%d", minY, maxY);
|
|
#endif
|
|
nscoord minimumLineHeight = mMinLineHeight;
|
|
nscoord fontAscent, fontHeight;
|
|
fm->GetMaxAscent(fontAscent);
|
|
if (nsHTMLReflowState::UseComputedHeight()) {
|
|
fontHeight = parentFont->mFont.size;
|
|
}
|
|
else {
|
|
fm->GetHeight(fontHeight);
|
|
}
|
|
nscoord leading = minimumLineHeight - fontHeight;
|
|
nscoord yTop = -fontAscent - leading/2;
|
|
nscoord yBottom = yTop + minimumLineHeight;
|
|
if (yTop < minY) minY = yTop;
|
|
if (yBottom > maxY) maxY = yBottom;
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
printf(" new values: %d,%d\n", minY, maxY);
|
|
#endif
|
|
}
|
|
else {
|
|
// XXX issues:
|
|
// [1] BR's on empty lines stop working
|
|
// [2] May not honor css2's notion of handling empty elements
|
|
// [3] blank lines in a pre-section ("\n") (handled with preMode)
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
printf(" ==> zapping min/maxY: currentValues: %d,%d newValues: 0,0\n",
|
|
minY, maxY);
|
|
#endif
|
|
minY = maxY = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
psd->mMinY = minY;
|
|
psd->mMaxY = maxY;
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
printf(" ==> minY=%d maxY=%d delta=%d maxTopBoxHeight=%d maxBottomBoxHeight=%d\n",
|
|
minY, maxY, maxY - minY, maxTopBoxHeight, maxBottomBoxHeight);
|
|
#endif
|
|
if (maxTopBoxHeight > mMaxTopBoxHeight) {
|
|
mMaxTopBoxHeight = maxTopBoxHeight;
|
|
}
|
|
if (maxBottomBoxHeight > mMaxBottomBoxHeight) {
|
|
mMaxBottomBoxHeight = maxBottomBoxHeight;
|
|
}
|
|
}
|
|
|
|
PRBool
|
|
nsLineLayout::TrimTrailingWhiteSpaceIn(PerSpanData* psd,
|
|
nscoord* aDeltaWidth)
|
|
{
|
|
// XXX what about NS_STYLE_DIRECTION_RTL?
|
|
if (NS_STYLE_DIRECTION_RTL == psd->mDirection) {
|
|
*aDeltaWidth = 0;
|
|
return PR_TRUE;
|
|
}
|
|
|
|
PerFrameData* pfd = psd->mFirstFrame;
|
|
if (!pfd) {
|
|
*aDeltaWidth = 0;
|
|
return PR_FALSE;
|
|
}
|
|
pfd = pfd->Last();
|
|
while (nsnull != pfd) {
|
|
#ifdef REALLY_NOISY_TRIM
|
|
nsFrame::ListTag(stdout, (psd == mRootSpan
|
|
? mBlockReflowState->frame
|
|
: psd->mFrame->mFrame));
|
|
printf(": attempting trim of ");
|
|
nsFrame::ListTag(stdout, pfd->mFrame);
|
|
printf("\n");
|
|
#endif
|
|
PerSpanData* childSpan = pfd->mSpan;
|
|
if (childSpan) {
|
|
// Maybe the child span has the trailing white-space in it?
|
|
if (TrimTrailingWhiteSpaceIn(childSpan, aDeltaWidth)) {
|
|
nscoord deltaWidth = *aDeltaWidth;
|
|
if (deltaWidth) {
|
|
// Adjust the child spans frame size
|
|
pfd->mBounds.width -= deltaWidth;
|
|
if (psd != mRootSpan) {
|
|
// When the child span is not a direct child of the block
|
|
// we need to update the child spans frame rectangle
|
|
// because it most likely will not be done again. Spans
|
|
// that are direct children of the block will be updated
|
|
// later, however, because the VerticalAlignFrames method
|
|
// will be run after this method.
|
|
nsRect r;
|
|
nsIFrame* f = pfd->mFrame;
|
|
f->GetRect(r);
|
|
r.width -= deltaWidth;
|
|
f->SetRect(r);
|
|
}
|
|
|
|
// Adjust the right edge of the span that contains the child span
|
|
psd->mX -= deltaWidth;
|
|
|
|
// Slide any frames that follow the child span over by the
|
|
// right amount. The only thing that can follow the child
|
|
// span is empty stuff, so we are just making things
|
|
// sensible (keeping the combined area honest).
|
|
while (pfd->mNext) {
|
|
pfd = pfd->mNext;
|
|
pfd->mBounds.x -= deltaWidth;
|
|
}
|
|
}
|
|
return PR_TRUE;
|
|
}
|
|
}
|
|
else if (!pfd->mIsTextFrame) {
|
|
// If we hit a frame on the end that's not text, then there is
|
|
// no trailing whitespace to trim. Stop the search.
|
|
*aDeltaWidth = 0;
|
|
return PR_TRUE;
|
|
}
|
|
else if (pfd->mIsNonEmptyTextFrame) {
|
|
nscoord deltaWidth = 0;
|
|
nsIHTMLReflow* hr;
|
|
nsresult rv = pfd->mFrame->QueryInterface(kIHTMLReflowIID, (void**)&hr);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
hr->TrimTrailingWhiteSpace(&mPresContext,
|
|
*mBlockReflowState->rendContext,
|
|
deltaWidth);
|
|
#ifdef NOISY_TRIM
|
|
nsFrame::ListTag(stdout, (psd == mRootSpan
|
|
? mBlockReflowState->frame
|
|
: psd->mFrame->mFrame));
|
|
printf(": trim of ");
|
|
nsFrame::ListTag(stdout, pfd->mFrame);
|
|
printf(" returned %d\n", deltaWidth);
|
|
#endif
|
|
if (deltaWidth) {
|
|
pfd->mBounds.width -= deltaWidth;
|
|
pfd->mCombinedArea.width -= deltaWidth;
|
|
if (0 == pfd->mBounds.width) {
|
|
pfd->mMaxElementSize.width = 0;
|
|
pfd->mMaxElementSize.height = 0;
|
|
}
|
|
|
|
// See if the text frame has already been placed in its parent
|
|
if (psd != mRootSpan) {
|
|
// The frame was already placed during psd's
|
|
// reflow. Update the frames rectangle now.
|
|
pfd->mFrame->SetRect(pfd->mBounds);
|
|
}
|
|
|
|
// Adjust containing span's right edge
|
|
psd->mX -= deltaWidth;
|
|
|
|
// Slide any frames that follow the text frame over by the
|
|
// right amount. The only thing that can follow the text
|
|
// frame is empty stuff, so we are just making things
|
|
// sensible (keeping the combined area honest).
|
|
while (pfd->mNext) {
|
|
pfd = pfd->mNext;
|
|
pfd->mBounds.x -= deltaWidth;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Pass up to caller so they can shrink their span
|
|
*aDeltaWidth = deltaWidth;
|
|
return PR_TRUE;
|
|
}
|
|
pfd = pfd->mPrev;
|
|
}
|
|
*aDeltaWidth = 0;
|
|
return PR_FALSE;
|
|
}
|
|
|
|
PRBool
|
|
nsLineLayout::TrimTrailingWhiteSpace()
|
|
{
|
|
PerSpanData* psd = mRootSpan;
|
|
nscoord deltaWidth;
|
|
TrimTrailingWhiteSpaceIn(psd, &deltaWidth);
|
|
return 0 != deltaWidth;
|
|
}
|
|
|
|
void
|
|
nsLineLayout::HorizontalAlignFrames(nsRect& aLineBounds, PRBool aAllowJustify)
|
|
{
|
|
PerSpanData* psd = mRootSpan;
|
|
nscoord availWidth = psd->mRightEdge;
|
|
if (NS_UNCONSTRAINEDSIZE == availWidth) {
|
|
// Don't bother horizontal aligning on pass1 table reflow
|
|
#ifdef NOISY_HORIZONTAL_ALIGN
|
|
nsFrame::ListTag(stdout, mBlockReflowState->frame);
|
|
printf(": skipping horizontal alignment in pass1 table reflow\n");
|
|
#endif
|
|
return;
|
|
}
|
|
availWidth -= psd->mLeftEdge;
|
|
nscoord remainingWidth = availWidth - aLineBounds.width;
|
|
#ifdef NOISY_HORIZONTAL_ALIGN
|
|
nsFrame::ListTag(stdout, mBlockReflowState->frame);
|
|
printf(": availWidth=%d lineWidth=%d delta=%d\n",
|
|
availWidth, aLineBounds.width, remainingWidth);
|
|
#endif
|
|
if (remainingWidth > 0) {
|
|
nscoord dx = 0;
|
|
switch (mTextAlign) {
|
|
case NS_STYLE_TEXT_ALIGN_DEFAULT:
|
|
if (NS_STYLE_DIRECTION_LTR == psd->mDirection) {
|
|
// default alignment for left-to-right is left so do nothing
|
|
break;
|
|
}
|
|
// Fall through to align right case for default alignment
|
|
// used when the direction is right-to-left.
|
|
|
|
case NS_STYLE_TEXT_ALIGN_RIGHT:
|
|
case NS_STYLE_TEXT_ALIGN_MOZ_RIGHT:
|
|
dx = remainingWidth;
|
|
break;
|
|
|
|
case NS_STYLE_TEXT_ALIGN_LEFT:
|
|
break;
|
|
|
|
case NS_STYLE_TEXT_ALIGN_JUSTIFY:
|
|
// If this is not the last line then go ahead and justify the
|
|
// frames in the line. If it is the last line then if the
|
|
// direction is right-to-left then we right-align the frames.
|
|
if (aAllowJustify) {
|
|
break;
|
|
}
|
|
else if (NS_STYLE_DIRECTION_RTL == psd->mDirection) {
|
|
// right align the frames
|
|
dx = remainingWidth;
|
|
}
|
|
break;
|
|
|
|
case NS_STYLE_TEXT_ALIGN_CENTER:
|
|
case NS_STYLE_TEXT_ALIGN_MOZ_CENTER:
|
|
dx = remainingWidth / 2;
|
|
break;
|
|
}
|
|
if (0 != dx) {
|
|
PerFrameData* pfd = psd->mFirstFrame;
|
|
while (nsnull != pfd) {
|
|
pfd->mBounds.x += dx;
|
|
pfd->mFrame->SetRect(pfd->mBounds);
|
|
pfd = pfd->mNext;
|
|
}
|
|
aLineBounds.width += dx;
|
|
}
|
|
|
|
if ((NS_STYLE_DIRECTION_RTL == psd->mDirection) &&
|
|
!psd->mChangedFrameDirection) {
|
|
psd->mChangedFrameDirection = PR_TRUE;
|
|
|
|
/* Assume that all frames have been right aligned.*/
|
|
PerFrameData* pfd = psd->mFirstFrame;
|
|
PRUint32 maxX = psd->mRightEdge;
|
|
while (nsnull != pfd) {
|
|
pfd->mBounds.x = maxX - pfd->mBounds.width;
|
|
pfd->mFrame->SetRect(pfd->mBounds);
|
|
maxX = pfd->mBounds.x;
|
|
pfd = pfd->mNext;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsLineLayout::RelativePositionFrames(nsRect& aCombinedArea)
|
|
{
|
|
RelativePositionFrames(mRootSpan, aCombinedArea);
|
|
}
|
|
|
|
void
|
|
nsLineLayout::RelativePositionFrames(PerSpanData* psd, nsRect& aCombinedArea)
|
|
{
|
|
nsPoint origin;
|
|
nsRect spanCombinedArea;
|
|
PerFrameData* pfd;
|
|
|
|
nscoord x0, y0, x1, y1;
|
|
if (nsnull != psd->mFrame) {
|
|
// The minimum combined area for the frames in a span covers the
|
|
// entire span frame.
|
|
pfd = psd->mFrame;
|
|
x0 = 0;
|
|
y0 = 0;
|
|
x1 = pfd->mBounds.width;
|
|
y1 = pfd->mBounds.height;
|
|
}
|
|
else {
|
|
// The minimum combined area for the frames that are direct
|
|
// children of the block starts at the upper left corner of the
|
|
// line and is sized to match the size of the line's bounding box
|
|
// (the same size as the values returned from VerticalAlignFrames)
|
|
x0 = psd->mLeftEdge;
|
|
x1 = psd->mX;
|
|
y0 = mTopEdge;
|
|
y1 = mTopEdge + mFinalLineHeight;
|
|
}
|
|
|
|
pfd = psd->mFirstFrame;
|
|
PRBool updatedCombinedArea = PR_FALSE;
|
|
while (nsnull != pfd) {
|
|
nscoord x = pfd->mBounds.x;
|
|
nscoord y = pfd->mBounds.y;
|
|
|
|
// Adjust the origin of the frame
|
|
if (pfd->mRelativePos) {
|
|
nsIFrame* frame = pfd->mFrame;
|
|
frame->GetOrigin(origin);
|
|
// XXX what about right and bottom?
|
|
nscoord dx = pfd->mOffsets.left;
|
|
nscoord dy = pfd->mOffsets.top;
|
|
frame->MoveTo(origin.x + dx, origin.y + dy);
|
|
x += dx;
|
|
y += dy;
|
|
}
|
|
|
|
// Note: the combined area of a child is in its coordinate
|
|
// system. We adjust the childs combined area into our coordinate
|
|
// system before computing the aggregated value by adding in
|
|
// <b>x</b> and <b>y</b> which were computed above.
|
|
nsRect* r = &pfd->mCombinedArea;
|
|
if (pfd->mSpan) {
|
|
// Compute a new combined area for the child span before
|
|
// aggregating it into our combined area.
|
|
r = &spanCombinedArea;
|
|
RelativePositionFrames(pfd->mSpan, spanCombinedArea);
|
|
}
|
|
|
|
// Only if the frame has some area do we let it affect the
|
|
// combined area. Otherwise empty frames placed next to a floating
|
|
// element will cause the floaters margin to be relevant, which we
|
|
// don't want to happen.
|
|
if (r->width && r->height) {
|
|
nscoord xl = x + r->x;
|
|
nscoord xr = x + r->XMost();
|
|
if (xl < x0) {
|
|
x0 = xl;
|
|
}
|
|
if (xr > x1) {
|
|
x1 = xr;
|
|
}
|
|
nscoord yt = y + r->y;
|
|
nscoord yb = y + r->YMost();
|
|
if (yt < y0) {
|
|
y0 = yt;
|
|
}
|
|
if (yb > y1) {
|
|
y1 = yb;
|
|
}
|
|
updatedCombinedArea = PR_TRUE;
|
|
}
|
|
|
|
pfd = pfd->mNext;
|
|
}
|
|
|
|
// Compute aggregated combined area
|
|
if (updatedCombinedArea) {
|
|
aCombinedArea.x = x0;
|
|
aCombinedArea.y = y0;
|
|
aCombinedArea.width = x1 - x0;
|
|
aCombinedArea.height = y1 - y0;
|
|
}
|
|
else {
|
|
aCombinedArea.x = 0;
|
|
aCombinedArea.y = y0;
|
|
aCombinedArea.width = 0;
|
|
aCombinedArea.height = 0;
|
|
}
|
|
|
|
// If we just computed a spans combined area, we need to update its
|
|
// NS_FRAME_OUTSIDE_CHILDREN bit..
|
|
if (nsnull != psd->mFrame) {
|
|
pfd = psd->mFrame;
|
|
nsIFrame* frame = pfd->mFrame;
|
|
nsFrameState oldState;
|
|
frame->GetFrameState(&oldState);
|
|
nsFrameState newState = oldState & ~NS_FRAME_OUTSIDE_CHILDREN;
|
|
if ((x0 < 0) || (y0 < 0) ||
|
|
(x1 > pfd->mBounds.width) || (y1 > pfd->mBounds.height)) {
|
|
newState |= NS_FRAME_OUTSIDE_CHILDREN;
|
|
}
|
|
if (newState != oldState) {
|
|
frame->SetFrameState(newState);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsLineLayout::ForgetWordFrame(nsIFrame* aFrame)
|
|
{
|
|
NS_ASSERTION((void*)aFrame == mWordFrames[0], "forget-word-frame");
|
|
if (0 != mWordFrames.Count()) {
|
|
mWordFrames.RemoveElementAt(0);
|
|
}
|
|
}
|
|
|
|
nsIFrame*
|
|
nsLineLayout::FindNextText(nsIFrame* aFrame)
|
|
{
|
|
// Only the first-in-flows are present in the text run list so
|
|
// backup from the argument frame to its first-in-flow.
|
|
for (;;) {
|
|
nsIFrame* prevInFlow;
|
|
aFrame->GetPrevInFlow(&prevInFlow);
|
|
if (nsnull == prevInFlow) {
|
|
break;
|
|
}
|
|
aFrame = prevInFlow;
|
|
}
|
|
|
|
// Now look for the frame that follows aFrame's first-in-flow
|
|
nsTextRun* run = mReflowTextRuns;
|
|
while (nsnull != run) {
|
|
PRInt32 ix = run->mArray.IndexOf(aFrame);
|
|
if (ix >= 0) {
|
|
if (ix < run->mArray.Count() - 1) {
|
|
return (nsIFrame*) run->mArray[ix + 1];
|
|
}
|
|
}
|
|
run = run->mNext;
|
|
}
|
|
return nsnull;
|
|
}
|
|
|
|
nsresult
|
|
nsLineLayout::AddText(nsIFrame* aTextFrame)
|
|
{
|
|
if (nsnull == mNewTextRun) {
|
|
mNewTextRun = new nsTextRun();
|
|
if (nsnull == mNewTextRun) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
*mTextRunP = mNewTextRun;
|
|
mTextRunP = &mNewTextRun->mNext;
|
|
}
|
|
#ifdef DEBUG_ADD_TEXT
|
|
{
|
|
// Check that text-frame is not already there
|
|
PRInt32 ix = mNewTextRun->mArray.IndexOf((void*)aTextFrame);
|
|
NS_ASSERTION(ix < 0, "text frame already in text run");
|
|
}
|
|
#endif
|
|
mNewTextRun->mArray.AppendElement(aTextFrame);/* XXX out-of-memory */
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsLineLayout::EndTextRun()
|
|
{
|
|
if (mNewTextRun) {
|
|
PRInt32 numTextInRun = mNewTextRun->mArray.Count();
|
|
if (numTextInRun < 2) {
|
|
// Don't bother remembering empty text-runs: reset the array
|
|
// back to zero elements. This effectively prepares this
|
|
// text-run for the next round. If it turns out there is no next
|
|
// round then we will get rid of it later in TakeTextRuns.
|
|
mNewTextRun->mArray.Clear();
|
|
}
|
|
}
|
|
mNewTextRun = nsnull;
|
|
}
|
|
|
|
nsTextRun*
|
|
nsLineLayout::TakeTextRuns()
|
|
{
|
|
nsTextRun* result = mTextRuns;
|
|
mTextRuns = nsnull;
|
|
mTextRunP = &mTextRuns;
|
|
mNewTextRun = nsnull;
|
|
|
|
// Eliminate any text-runs that are empty
|
|
nsTextRun** rp = &result;
|
|
nsTextRun* run = *rp;
|
|
while (run) {
|
|
if (0 == run->mArray.Count()) {
|
|
*rp = run->mNext;
|
|
delete run;
|
|
}
|
|
else {
|
|
rp = &run->mNext;
|
|
}
|
|
run = *rp;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
PRBool
|
|
nsLineLayout::TreatFrameAsBlock(nsIFrame* aFrame)
|
|
{
|
|
const nsStyleDisplay* display;
|
|
const nsStylePosition* position;
|
|
aFrame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&) display);
|
|
aFrame->GetStyleData(eStyleStruct_Position,(const nsStyleStruct*&) position);
|
|
if (NS_STYLE_POSITION_ABSOLUTE == position->mPosition) {
|
|
return PR_FALSE;
|
|
}
|
|
if (NS_STYLE_FLOAT_NONE != display->mFloats) {
|
|
return PR_FALSE;
|
|
}
|
|
switch (display->mDisplay) {
|
|
case NS_STYLE_DISPLAY_BLOCK:
|
|
case NS_STYLE_DISPLAY_LIST_ITEM:
|
|
case NS_STYLE_DISPLAY_RUN_IN:
|
|
case NS_STYLE_DISPLAY_COMPACT:
|
|
case NS_STYLE_DISPLAY_TABLE:
|
|
return PR_TRUE;
|
|
}
|
|
return PR_FALSE;
|
|
}
|