зеркало из https://github.com/mozilla/gecko-dev.git
3500 строки
118 KiB
C++
3500 строки
118 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.1 (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" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Steve Clark <buster@netscape.com>
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* Pierre Phaneuf <pp@ludusdesign.com>
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* L. David Baron <dbaron@fas.harvard.edu>
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* Robert O'Callahan <roc+moz@cs.cmu.edu>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsCOMPtr.h"
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#include "nsLineLayout.h"
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#include "nsBlockFrame.h"
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#include "nsInlineFrame.h"
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#include "nsStyleConsts.h"
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#include "nsHTMLContainerFrame.h"
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#include "nsSpaceManager.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 "nsReflowPath.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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#include "nsITextContent.h"
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#include "nsIView.h"
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#include "nsIViewManager.h"
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#include "nsHTMLAtoms.h"
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#include "nsTextFragment.h"
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#ifdef IBMBIDI
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#include "nsBidiUtils.h"
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#include "nsIFormControlFrame.h"
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#include "nsITextFrame.h"
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#define FIX_FOR_BUG_40882
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#endif // IBMBIDI
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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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//----------------------------------------------------------------------
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#define FIX_BUG_50257
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#define PLACED_LEFT 0x1
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#define PLACED_RIGHT 0x2
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#define HACK_MEW
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//#undef HACK_MEW
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#ifdef HACK_MEW
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static nscoord AccumulateImageSizes(nsIPresContext& aPresContext, nsIFrame& aFrame)
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{
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nscoord sizes = 0;
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// see if aFrame is an image frame first
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nsCOMPtr<nsIAtom> type;
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aFrame.GetFrameType(getter_AddRefs(type));
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if(type.get() == nsLayoutAtoms::imageFrame) {
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nsSize size;
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aFrame.GetSize(size);
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sizes += NS_STATIC_CAST(nscoord,size.width);
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} else {
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// see if there are children to process
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nsIFrame* child = nsnull;
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// XXX: process alternate child lists?
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aFrame.FirstChild(&aPresContext,nsnull,&child);
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while(child) {
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// recurse: note that we already know we are in a child frame, so no need to track further
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sizes += AccumulateImageSizes(aPresContext, *child);
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// now next sibling
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child->GetNextSibling(&child);
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}
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}
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return sizes;
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}
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static PRBool InUnconstrainedTableCell(const nsHTMLReflowState& aBlockReflowState)
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{
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PRBool result = PR_FALSE;
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// get the parent reflow state
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const nsHTMLReflowState* parentReflowState = aBlockReflowState.parentReflowState;
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if (parentReflowState) {
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// check if the frame is a tablecell
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NS_ASSERTION(parentReflowState->mStyleDisplay, "null styleDisplay in parentReflowState unexpected");
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if (parentReflowState->mStyleDisplay &&
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parentReflowState->mStyleDisplay->mDisplay == NS_STYLE_DISPLAY_TABLE_CELL) {
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// see if width is unconstrained or percent
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NS_ASSERTION(parentReflowState->mStylePosition, "null stylePosition in parentReflowState unexpected");
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if(parentReflowState->mStylePosition) {
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switch(parentReflowState->mStylePosition->mWidth.GetUnit()) {
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case eStyleUnit_Auto :
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case eStyleUnit_Null :
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result = PR_TRUE;
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break;
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default:
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result = PR_FALSE;
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break;
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}
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}
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}
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}
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return result;
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}
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#endif
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MOZ_DECL_CTOR_COUNTER(nsLineLayout)
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nsLineLayout::nsLineLayout(nsIPresContext* aPresContext,
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nsSpaceManager* 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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mTextIndent(0),
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mWordFrames(0)
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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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mFlags = 0; // default all flags to false except those that follow here...
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SetFlag(LL_ENDSINWHITESPACE, PR_TRUE);
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mPlacedFloaters = 0;
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mTotalPlacedFrames = 0;
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mTopEdge = mBottomEdge = 0;
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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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mPresContext->GetCompatibilityMode(&mCompatMode);
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}
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nsLineLayout::nsLineLayout(nsIPresContext* aPresContext)
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: mPresContext(aPresContext),
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mWordFrames(0)
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{
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MOZ_COUNT_CTOR(nsLineLayout);
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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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// 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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// Find out if the frame has a non-null prev-in-flow, i.e., whether it
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// is a continuation.
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inline PRBool
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HasPrevInFlow(nsIFrame *aFrame)
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{
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nsIFrame *prevInFlow;
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aFrame->GetPrevInFlow(&prevInFlow);
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return prevInFlow != nsnull;
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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 impacted=%s %s\n",
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aX, aY, aWidth, aHeight,
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aImpactedByFloaters?"true":"false",
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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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SetFlag(LL_ENDSINWHITESPACE, PR_TRUE);
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SetFlag(LL_UNDERSTANDSNWHITESPACE, PR_FALSE);
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SetFlag(LL_TEXTSTARTSWITHNBSP, PR_FALSE);
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SetFlag(LL_FIRSTLETTERSTYLEOK, PR_FALSE);
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SetFlag(LL_ISTOPOFPAGE, aIsTopOfPage);
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SetFlag(LL_UPDATEDBAND, PR_FALSE);
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mPlacedFloaters = 0;
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SetFlag(LL_IMPACTEDBYFLOATERS, aImpactedByFloaters);
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mTotalPlacedFrames = 0;
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SetFlag(LL_CANPLACEFLOATER, PR_TRUE);
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SetFlag(LL_LINEENDSINBR, PR_FALSE);
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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->mStyleVisibility->mDirection;
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psd->mChangedFrameDirection = PR_FALSE;
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// If this is the first line of a block then see if the text-indent
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// property amounts to anything.
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if (0 == mLineNumber && !HasPrevInFlow(mBlockReflowState->frame)) {
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nscoord indent = 0;
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nsStyleUnit unit = mStyleText->mTextIndent.GetUnit();
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if (eStyleUnit_Coord == unit) {
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indent = mStyleText->mTextIndent.GetCoordValue();
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}
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else if (eStyleUnit_Percent == unit) {
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nscoord width =
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nsHTMLReflowState::GetContainingBlockContentWidth(mBlockReflowState->parentReflowState);
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if ((0 != width) && (NS_UNCONSTRAINEDSIZE != width)) {
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indent = nscoord(mStyleText->mTextIndent.GetPercentValue() * width);
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}
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}
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mTextIndent = indent;
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if (NS_STYLE_DIRECTION_RTL == psd->mDirection) {
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if (NS_UNCONSTRAINEDSIZE != psd->mRightEdge) {
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psd->mRightEdge -= indent;
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}
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}
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else {
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psd->mX += indent;
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}
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}
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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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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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nsIFrame* aFloaterFrame)
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{
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#ifdef REALLY_NOISY_REFLOW
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printf("nsLL::UpdateBand %d, %d, %d, %d, frame=%p placedLeft=%s\n will set mImpacted to PR_TRUE\n",
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aX, aY, aWidth, aHeight, aFloaterFrame, aPlacedLeftFloater?"true":"false");
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#endif
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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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SetFlag(LL_UPDATEDBAND, PR_TRUE);
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mPlacedFloaters |= (aPlacedLeftFloater ? PLACED_LEFT : PLACED_RIGHT);
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SetFlag(LL_IMPACTEDBYFLOATERS, PR_TRUE);
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nsCOMPtr<nsIAtom> frameType;
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aFloaterFrame->GetFrameType(getter_AddRefs(frameType));
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SetFlag(LL_LASTFLOATERWASLETTERFRAME, (nsLayoutAtoms::letterFrame == frameType.get()));
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// Now update all of the open spans...
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mRootSpan->mContainsFloater = PR_TRUE; // make sure mRootSpan gets updated too
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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 {
|
|
psd->mRightEdge += deltaWidth;
|
|
}
|
|
psd->mContainsFloater = PR_TRUE;
|
|
#ifdef NOISY_REFLOW
|
|
printf(" span %p: oldRightEdge=%d newRightEdge=%d\n",
|
|
psd, psd->mRightEdge - deltaWidth, psd->mRightEdge);
|
|
#endif
|
|
psd = psd->mParent;
|
|
}
|
|
}
|
|
|
|
// Note: Only adjust the outermost frames (the ones that are direct
|
|
// children of the block), not the ones in the child spans. The reason
|
|
// is simple: the frames in the spans have coordinates local to their
|
|
// parent therefore they are moved when their parent span is moved.
|
|
void
|
|
nsLineLayout::UpdateFrames()
|
|
{
|
|
NS_ASSERTION(nsnull != mRootSpan, "UpdateFrames with no active spans");
|
|
|
|
PerSpanData* psd = mRootSpan;
|
|
if (NS_STYLE_DIRECTION_LTR == psd->mDirection) {
|
|
if (PLACED_LEFT & mPlacedFloaters) {
|
|
PerFrameData* pfd = psd->mFirstFrame;
|
|
while (nsnull != pfd) {
|
|
pfd->mBounds.x = psd->mX;
|
|
pfd = pfd->mNext;
|
|
}
|
|
}
|
|
}
|
|
else if (PLACED_RIGHT & mPlacedFloaters) {
|
|
// XXX handle DIR=right-to-left
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
nsLineLayout::NewPerSpanData(PerSpanData** aResult)
|
|
{
|
|
PerSpanData* psd = mSpanFreeList;
|
|
if (nsnull == psd) {
|
|
if (mInitialSpansFreed < NS_LINELAYOUT_NUM_SPANS) {
|
|
// use one of the ones defined in our struct...
|
|
psd = &mSpanDataBuf[mInitialSpansFreed++];
|
|
}
|
|
else {
|
|
psd = new PerSpanData;
|
|
if (nsnull == psd) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
mSpanFreeList = psd->mNextFreeSpan;
|
|
}
|
|
psd->mParent = nsnull;
|
|
psd->mFrame = nsnull;
|
|
psd->mFirstFrame = nsnull;
|
|
psd->mLastFrame = nsnull;
|
|
psd->mContainsFloater = PR_FALSE;
|
|
psd->mZeroEffectiveSpanBox = PR_FALSE;
|
|
|
|
#ifdef DEBUG
|
|
mSpansAllocated++;
|
|
#endif
|
|
*aResult = psd;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsLineLayout::BeginSpan(nsIFrame* aFrame,
|
|
const nsHTMLReflowState* aSpanReflowState,
|
|
nscoord aLeftEdge,
|
|
nscoord aRightEdge)
|
|
{
|
|
#ifdef NOISY_REFLOW
|
|
nsFrame::IndentBy(stdout, mSpanDepth+1);
|
|
nsFrame::ListTag(stdout, aFrame);
|
|
printf(": BeginSpan leftEdge=%d rightEdge=%d\n", aLeftEdge, aRightEdge);
|
|
#endif
|
|
|
|
PerSpanData* psd;
|
|
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;
|
|
|
|
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->mStyleVisibility->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) {
|
|
/* there's one oddball case we need to guard against
|
|
* if we're reflowed with NS_UNCONSTRAINEDSIZE
|
|
* then the last frame will not contribute to the max element size height
|
|
* if it is a text frame that only contains whitespace
|
|
*/
|
|
if (NS_UNCONSTRAINEDSIZE != psd->mRightEdge || // it's not an unconstrained reflow
|
|
pfd->mNext || // or it's not the last frame in the span
|
|
!pfd->GetFlag(PFD_ISTEXTFRAME) || // or it's not a text frame
|
|
pfd->GetFlag(PFD_ISNONWHITESPACETEXTFRAME) // or it contains something other than whitespace
|
|
) {
|
|
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;
|
|
pfd->mFrame = nsnull;
|
|
pfd->mFlags = 0; // all flags default to false
|
|
|
|
#ifdef DEBUG
|
|
pfd->mVerticalAlign = 0xFF;
|
|
mFramesAllocated++;
|
|
#endif
|
|
*aResult = pfd;
|
|
return NS_OK;
|
|
}
|
|
|
|
PRBool
|
|
nsLineLayout::CanPlaceFloaterNow() const
|
|
{
|
|
return GetFlag(LL_CANPLACEFLOATER);
|
|
}
|
|
|
|
PRBool
|
|
nsLineLayout::LineIsEmpty() const
|
|
{
|
|
return 0 == mTotalPlacedFrames;
|
|
}
|
|
|
|
PRBool
|
|
nsLineLayout::LineIsBreakable() const
|
|
{
|
|
if ((0 != mTotalPlacedFrames) || GetFlag(LL_IMPACTEDBYFLOATERS)) {
|
|
return PR_TRUE;
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
nsresult
|
|
nsLineLayout::ReflowFrame(nsIFrame* aFrame,
|
|
nsReflowStatus& aReflowStatus,
|
|
nsHTMLReflowMetrics* aMetrics,
|
|
PRBool& aPushedFrame)
|
|
{
|
|
// Initialize OUT parameter
|
|
aPushedFrame = PR_FALSE;
|
|
|
|
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.
|
|
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...
|
|
// especially we won't use the unlimited size for <hr> (bug 60992),
|
|
// the following code is a consequence of setting
|
|
// hr display:inline in quirks.css (bug 18754)
|
|
nsCOMPtr<nsIAtom> frameType;
|
|
if (InStrictMode() ||
|
|
(aFrame->GetFrameType(getter_AddRefs(frameType)),
|
|
nsLayoutAtoms::hrFrame != frameType)) {
|
|
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.
|
|
const nsHTMLReflowState* rs = psd->mReflowState;
|
|
nsReflowReason reason = eReflowReason_Resize;
|
|
nsFrameState state;
|
|
aFrame->GetFrameState(&state);
|
|
if (NS_FRAME_FIRST_REFLOW & state) {
|
|
reason = eReflowReason_Initial;
|
|
}
|
|
else if (rs->reason == eReflowReason_Incremental) { // XXX
|
|
// XXXwaterson (above) previously used mBlockReflowState rather
|
|
// than psd->mReflowState.
|
|
|
|
// If the frame we're about to reflow is on the reflow path, then
|
|
// propagate the reflow as `incremental' so it unwinds correctly
|
|
// to the target frames below us.
|
|
PRBool frameIsOnReflowPath = rs->path->HasChild(aFrame);
|
|
if (frameIsOnReflowPath)
|
|
reason = eReflowReason_Incremental;
|
|
|
|
// But...if the incremental reflow command is a StyleChanged
|
|
// reflow and its target is the current span, change the reason
|
|
// to `style change', so that it propagates through the entire
|
|
// subtree.
|
|
nsHTMLReflowCommand* rc = rs->path->mReflowCommand;
|
|
if (rc) {
|
|
nsReflowType type;
|
|
rc->GetType(type);
|
|
if (type == eReflowType_StyleChanged) {
|
|
nsIFrame* parentFrame = psd->mFrame
|
|
? psd->mFrame->mFrame
|
|
: mBlockReflowState->frame;
|
|
nsIFrame* target;
|
|
rc->GetTarget(target);
|
|
if (target == parentFrame) {
|
|
reason = eReflowReason_StyleChange;
|
|
}
|
|
}
|
|
else if (type == eReflowType_ReflowDirty &&
|
|
(state & NS_FRAME_IS_DIRTY) &&
|
|
!frameIsOnReflowPath) {
|
|
reason = eReflowReason_Dirty;
|
|
}
|
|
}
|
|
}
|
|
else if (rs->reason == eReflowReason_StyleChange) {
|
|
reason = eReflowReason_StyleChange;
|
|
}
|
|
else if (rs->reason == eReflowReason_Dirty) {
|
|
if (state & NS_FRAME_IS_DIRTY)
|
|
reason = eReflowReason_Dirty;
|
|
}
|
|
|
|
// Unless we're doing an unconstrained reflow, compute the
|
|
// containing block's width.
|
|
nscoord containingBlockWidth =
|
|
(NS_UNCONSTRAINEDSIZE != psd->mRightEdge)
|
|
? (psd->mRightEdge - psd->mLeftEdge)
|
|
: NS_UNCONSTRAINEDSIZE;
|
|
|
|
// Setup reflow state for reflowing the frame
|
|
nsHTMLReflowState reflowState(mPresContext, *psd->mReflowState,
|
|
aFrame, availSize,
|
|
containingBlockWidth,
|
|
psd->mReflowState->availableHeight,
|
|
reason);
|
|
reflowState.mLineLayout = this;
|
|
reflowState.mFlags.mIsTopOfPage = GetFlag(LL_ISTOPOFPAGE);
|
|
SetFlag(LL_UNDERSTANDSNWHITESPACE, PR_FALSE);
|
|
SetFlag(LL_TEXTSTARTSWITHNBSP, PR_FALSE);
|
|
mTextJustificationNumSpaces = 0;
|
|
mTextJustificationNumLetters = 0;
|
|
|
|
// 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->SetFlag(PFD_RELATIVEPOS,
|
|
(reflowState.mStyleDisplay->mPosition == NS_STYLE_POSITION_RELATIVE));
|
|
if (pfd->GetFlag(PFD_RELATIVEPOS)) {
|
|
pfd->mOffsets = reflowState.mComputedOffsets;
|
|
}
|
|
|
|
// 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.
|
|
pfd->mBounds.x = psd->mX;
|
|
pfd->mBounds.y = mTopEdge;
|
|
|
|
// 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 start margins (as appropriate) to the frame computing the
|
|
// new starting x,y coordinates for the frame.
|
|
ApplyStartMargin(pfd, reflowState);
|
|
|
|
// Let frame know that are reflowing it. Note that we don't bother
|
|
// positioning the frame yet, because we're probably going to end up
|
|
// moving it when we do the vertical alignment
|
|
nscoord x = pfd->mBounds.x;
|
|
nscoord y = pfd->mBounds.y;
|
|
|
|
aFrame->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);
|
|
|
|
#ifdef IBMBIDI
|
|
PRBool bidiEnabled;
|
|
mPresContext->GetBidiEnabled(&bidiEnabled);
|
|
PRBool visual;
|
|
PRBool setMode = PR_FALSE;
|
|
PRInt32 start, end;
|
|
|
|
if (bidiEnabled) {
|
|
if (state & NS_FRAME_IS_BIDI) {
|
|
aFrame->GetOffsets(start, end);
|
|
}
|
|
else {
|
|
nsCOMPtr<nsIFormControlFrame> formFrame(do_QueryInterface(aFrame) );
|
|
if (formFrame) {
|
|
mPresContext->IsVisualMode(visual);
|
|
|
|
PRUint32 options;
|
|
mPresContext->GetBidi(&options);
|
|
if ( (IBMBIDI_CONTROLSTEXTMODE_VISUAL == GET_BIDI_OPTION_CONTROLSTEXTMODE(options)
|
|
&& !visual)
|
|
|| (IBMBIDI_CONTROLSTEXTMODE_LOGICAL == GET_BIDI_OPTION_CONTROLSTEXTMODE(options)
|
|
&& visual) ) {
|
|
mPresContext->SetVisualMode(!visual);
|
|
setMode = PR_TRUE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif // IBMBIDI
|
|
|
|
nsCOMPtr<nsIAtom> frameType;
|
|
aFrame->GetFrameType(getter_AddRefs(frameType));
|
|
|
|
rv = aFrame->Reflow(mPresContext, metrics, reflowState, aReflowStatus);
|
|
if (NS_FAILED(rv)) {
|
|
NS_WARNING( "Reflow of frame failed in nsLineLayout" );
|
|
return rv;
|
|
}
|
|
|
|
#ifdef IBMBIDI
|
|
if (setMode) {
|
|
mPresContext->SetVisualMode(visual);
|
|
}
|
|
#endif // IBMBIDI
|
|
|
|
// SEC: added this next block for bug 45152
|
|
// text frames don't know how to invalidate themselves on initial reflow. Do it for them here.
|
|
// This only shows up in textareas, so do a quick check to see if we're inside one
|
|
if (eReflowReason_Initial == reflowState.reason)
|
|
{
|
|
if (frameType && nsLayoutAtoms::textFrame == frameType.get())
|
|
{ // aFrame is a text frame, see if it's inside a text control
|
|
// although this is a bit slow, the frame tree shouldn't be too deep, it's only called
|
|
// for the text frame's initial reflow (once in the text frame's lifetime)
|
|
// and we don't make any expensive calls.
|
|
// Doing it this way shields us from knowing anything about the frame structure inside a text control.
|
|
nsIFrame *parentFrame;
|
|
aFrame->GetParent(&parentFrame);
|
|
PRBool inTextControl = PR_FALSE;
|
|
while (parentFrame)
|
|
{
|
|
nsCOMPtr<nsIAtom> parentFrameType;
|
|
parentFrame->GetFrameType(getter_AddRefs(parentFrameType));
|
|
if (parentFrameType)
|
|
{
|
|
if (nsLayoutAtoms::textInputFrame == parentFrameType.get())
|
|
{
|
|
inTextControl = PR_TRUE; // found it
|
|
break;
|
|
}
|
|
}
|
|
parentFrame->GetParent(&parentFrame); // advance the loop up the frame tree
|
|
}
|
|
if (inTextControl)
|
|
{
|
|
nsLineBox *currentLine=nsnull;
|
|
// use localResult because a failure here should not be propagated to my caller
|
|
nsresult localResult = nsBlockFrame::GetCurrentLine(mBlockRS, ¤tLine);
|
|
if (NS_SUCCEEDED(localResult) && currentLine) {
|
|
currentLine->SetForceInvalidate(PR_TRUE);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// end fix for bug 45152
|
|
|
|
pfd->mJustificationNumSpaces = mTextJustificationNumSpaces;
|
|
pfd->mJustificationNumLetters = mTextJustificationNumLetters;
|
|
|
|
// XXX See if the frame is a placeholderFrame and if it is process
|
|
// the floater.
|
|
if (frameType) {
|
|
if (nsLayoutAtoms::placeholderFrame == frameType.get()) {
|
|
nsIFrame* outOfFlowFrame = ((nsPlaceholderFrame*)aFrame)->GetOutOfFlowFrame();
|
|
if (outOfFlowFrame) {
|
|
const nsStyleDisplay* display;
|
|
|
|
// Make sure it's floated and not absolutely positioned
|
|
outOfFlowFrame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&)display);
|
|
if (!display->IsAbsolutelyPositioned()) {
|
|
if (eReflowReason_Incremental == reason) {
|
|
InitFloater((nsPlaceholderFrame*)aFrame, aReflowStatus);
|
|
}
|
|
else {
|
|
AddFloater((nsPlaceholderFrame*)aFrame, aReflowStatus);
|
|
}
|
|
nsIAtom* oofft;
|
|
outOfFlowFrame->GetFrameType(&oofft);
|
|
if (oofft) {
|
|
if (oofft == nsLayoutAtoms::letterFrame) {
|
|
SetFlag(LL_FIRSTLETTERSTYLEOK, PR_FALSE);
|
|
// An incomplete reflow status means we should split the floater if the
|
|
// height is constrained (bug 145305). We never split floating first letters.
|
|
if (NS_FRAME_IS_NOT_COMPLETE(aReflowStatus))
|
|
aReflowStatus = NS_FRAME_COMPLETE;
|
|
}
|
|
NS_RELEASE(oofft);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else if (nsLayoutAtoms::textFrame == frameType.get()) {
|
|
// Note non-empty text-frames for inline frame compatability hackery
|
|
pfd->SetFlag(PFD_ISTEXTFRAME, PR_TRUE);
|
|
// XXX An empty text frame at the end of the line seems not
|
|
// to have zero width.
|
|
if (metrics.width) {
|
|
pfd->SetFlag(PFD_ISNONEMPTYTEXTFRAME, PR_TRUE);
|
|
nsCOMPtr<nsIContent> content;
|
|
nsresult result = pfd->mFrame->GetContent(getter_AddRefs(content));
|
|
if ((NS_SUCCEEDED(result)) && content) {
|
|
nsCOMPtr<nsITextContent> textContent
|
|
= do_QueryInterface(content, &result);
|
|
if ((NS_SUCCEEDED(result)) && textContent) {
|
|
PRBool isWhitespace;
|
|
result = textContent->IsOnlyWhitespace(&isWhitespace);
|
|
if (NS_SUCCEEDED(result)) {
|
|
pfd->SetFlag(PFD_ISNONWHITESPACETEXTFRAME, !isWhitespace);
|
|
}
|
|
// fix for bug 40882
|
|
#ifdef IBMBIDI
|
|
const nsTextFragment* frag;
|
|
textContent->GetText(&frag);
|
|
if (frag && frag->Is2b() ) {
|
|
//PRBool isVisual;
|
|
//mPresContext->IsVisualMode(isVisual);
|
|
PRUnichar ch = /*(isVisual) ?
|
|
*(frag->Get2b() + frag->GetLength() - 1) :*/ *frag->Get2b();
|
|
if (IS_BIDI_DIACRITIC(ch) ) {
|
|
aFrame->SetBidiProperty(mPresContext,
|
|
nsLayoutAtoms::endsInDiacritic, (void*)ch);
|
|
}
|
|
}
|
|
#endif // IBMBIDI
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else if (nsLayoutAtoms::letterFrame==frameType.get()) {
|
|
pfd->SetFlag(PFD_ISLETTERFRAME, PR_TRUE);
|
|
}
|
|
}
|
|
|
|
mSpaceManager->Translate(-tx, -ty);
|
|
|
|
NS_ASSERTION(metrics.width>=0, "bad width");
|
|
NS_ASSERTION(metrics.height>=0,"bad height");
|
|
if (metrics.width<0) metrics.width=0;
|
|
if (metrics.height<0) metrics.height=0;
|
|
|
|
#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 DEBUG
|
|
if (nsBlockFrame::gNoisyMaxElementSize) {
|
|
nsFrame::IndentBy(stdout, nsBlockFrame::gNoiseIndent);
|
|
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.mOverflowArea;
|
|
}
|
|
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;
|
|
}
|
|
|
|
// Size the frame and size its view (if it has one)
|
|
aFrame->SizeTo(mPresContext, metrics.width, metrics.height);
|
|
nsIView* view;
|
|
aFrame->GetView(mPresContext, &view);
|
|
if (view) {
|
|
nsIViewManager *vm;
|
|
view->GetViewManager(vm);
|
|
|
|
#if 0 // XXX This is the correct code. We'll turn it on later to mitigate risk.
|
|
vm->ResizeView(view, pfd->mCombinedArea);
|
|
#else // imitate the old, wrong code
|
|
nsRect r(0, 0, metrics.width, metrics.height);
|
|
vm->ResizeView(view, r);
|
|
#endif
|
|
NS_RELEASE(vm);
|
|
}
|
|
|
|
// Tell the frame that we're done reflowing it
|
|
aFrame->DidReflow(mPresContext, &reflowState, NS_FRAME_REFLOW_FINISHED);
|
|
|
|
if (aMetrics) {
|
|
*aMetrics = metrics;
|
|
}
|
|
|
|
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);
|
|
aPushedFrame = PR_TRUE;
|
|
}
|
|
}
|
|
else {
|
|
PushFrame(aFrame);
|
|
}
|
|
SetFlag(LL_TEXTSTARTSWITHNBSP, PR_FALSE); // reset for next time
|
|
|
|
#ifdef REALLY_NOISY_REFLOW
|
|
nsFrame::IndentBy(stdout, mSpanDepth);
|
|
printf("End ReflowFrame ");
|
|
nsFrame::ListTag(stdout, aFrame);
|
|
printf(" status=%x\n", aReflowStatus);
|
|
#endif
|
|
|
|
#ifdef IBMBIDI
|
|
if (state & NS_FRAME_IS_BIDI) {
|
|
nsITextFrame* textFrame = nsnull;
|
|
aFrame->QueryInterface(NS_GET_IID(nsITextFrame), (void**) &textFrame);
|
|
if (textFrame) {
|
|
// Since aReflowStatus may change, check it at the end
|
|
if (NS_INLINE_IS_BREAK_BEFORE(aReflowStatus) ) {
|
|
textFrame->SetOffsets(start, end);
|
|
nsFrameState frameState;
|
|
aFrame->GetFrameState(&frameState);
|
|
frameState |= NS_FRAME_IS_BIDI;
|
|
aFrame->SetFrameState(frameState);
|
|
}
|
|
else if (!NS_FRAME_IS_COMPLETE(aReflowStatus) ) {
|
|
PRInt32 newEnd;
|
|
aFrame->GetOffsets(start, newEnd);
|
|
if (newEnd != end) {
|
|
nsIFrame* nextInFlow;
|
|
aFrame->GetNextInFlow(&nextInFlow);
|
|
if (nextInFlow) {
|
|
nsITextFrame* nextTextInFlow = nsnull;
|
|
nextInFlow->QueryInterface(NS_GET_IID(nsITextFrame),
|
|
(void**) &nextTextInFlow);
|
|
if (nextTextInFlow) {
|
|
nextInFlow->GetOffsets(start, end);
|
|
nextTextInFlow->SetOffsets(newEnd, end);
|
|
nsFrameState frameState;
|
|
nextInFlow->GetFrameState(&frameState);
|
|
frameState |= NS_FRAME_IS_BIDI;
|
|
nextInFlow->SetFrameState(frameState);
|
|
}
|
|
} // nextInFlow
|
|
} // newEnd != end
|
|
} // !NS_FRAME_IS_COMPLETE(aReflowStatus)
|
|
} // textFrame
|
|
} // isBidiFrame
|
|
#endif // IBMBIDI
|
|
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
nsLineLayout::ApplyStartMargin(PerFrameData* pfd,
|
|
nsHTMLReflowState& aReflowState)
|
|
{
|
|
NS_ASSERTION(aReflowState.mStyleDisplay->mFloats == NS_STYLE_FLOAT_NONE,
|
|
"How'd we get a floated inline frame? "
|
|
"The frame ctor should've dealt with this.");
|
|
|
|
// XXXwaterson probably not the right way to get this; e.g., embeddings, etc.
|
|
PRBool ltr = (NS_STYLE_DIRECTION_LTR == aReflowState.mStyleVisibility->mDirection);
|
|
|
|
PRBool reducedBothMargins = PR_FALSE;
|
|
// An HR needs to reduce the avail width by both margins, because it effectively fits
|
|
// on one line. If it gets continued then only the continuation has any width. XXX - Are
|
|
// there other elements with these characterstics and if so, is there a bit indicating that?
|
|
if (NS_UNCONSTRAINEDSIZE != aReflowState.availableWidth) {
|
|
nsCOMPtr<nsIAtom> frameType;
|
|
pfd->mFrame->GetFrameType(getter_AddRefs(frameType));
|
|
if (nsLayoutAtoms::hrFrame == frameType.get()) {
|
|
aReflowState.availableWidth -= pfd->mMargin.left + pfd->mMargin.right;
|
|
reducedBothMargins = PR_TRUE;
|
|
}
|
|
}
|
|
|
|
// Only apply start-margin on the first-in flow for inline frames
|
|
if (HasPrevInFlow(pfd->mFrame)) {
|
|
// Zero this out so that when we compute the max-element-size of
|
|
// the frame we will properly avoid adding in the starting margin.
|
|
if (ltr)
|
|
pfd->mMargin.left = 0;
|
|
else
|
|
pfd->mMargin.right = 0;
|
|
}
|
|
|
|
if ((NS_UNCONSTRAINEDSIZE != aReflowState.availableWidth) && !reducedBothMargins){
|
|
// Adjust available width to account for the left margin. The
|
|
// right margin will be accounted for when we finish flowing the
|
|
// frame.
|
|
aReflowState.availableWidth -= ltr ? pfd->mMargin.left : pfd->mMargin.right;
|
|
}
|
|
|
|
if (ltr)
|
|
pfd->mBounds.x += pfd->mMargin.left;
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
NS_PRECONDITION(pfd && pfd->mFrame, "bad args, null pointers for frame data");
|
|
// Compute right margin to use
|
|
if (0 != pfd->mBounds.width) {
|
|
NS_ASSERTION(aReflowState.mStyleDisplay->mFloats == NS_STYLE_FLOAT_NONE,
|
|
"How'd we get a floated inline frame? "
|
|
"The frame ctor should've dealt with this.");
|
|
|
|
// XXXwaterson this is probably not exactly right; e.g., embeddings, etc.
|
|
PRBool ltr = (NS_STYLE_DIRECTION_LTR == aReflowState.mStyleVisibility->mDirection);
|
|
|
|
if (NS_FRAME_IS_NOT_COMPLETE(aStatus)) {
|
|
// Only apply end margin for the last-in-flow. Zero this out so
|
|
// that when we compute the max-element-size of the frame we
|
|
// will properly avoid adding in the end margin.
|
|
if (ltr)
|
|
pfd->mMargin.right = 0;
|
|
else
|
|
pfd->mMargin.left = 0;
|
|
}
|
|
}
|
|
else {
|
|
// Don't apply margin to empty frames.
|
|
pfd->mMargin.left = pfd->mMargin.right = 0;
|
|
}
|
|
|
|
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() + pfd->mMargin.right > 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 + pfd->mMargin.right) {
|
|
// Empty frames always fit right where they are
|
|
#ifdef NOISY_CAN_PLACE_FRAME
|
|
printf(" ==> empty frame fits\n");
|
|
#endif
|
|
return PR_TRUE;
|
|
}
|
|
|
|
#ifdef FIX_BUG_50257
|
|
// another special case: always place a BR
|
|
nsCOMPtr<nsIAtom> frameType;
|
|
pfd->mFrame->GetFrameType(getter_AddRefs(frameType));
|
|
if (nsLayoutAtoms::brFrame == frameType.get()) {
|
|
#ifdef NOISY_CAN_PLACE_FRAME
|
|
printf(" ==> BR frame fits\n");
|
|
#endif
|
|
return PR_TRUE;
|
|
}
|
|
#endif
|
|
|
|
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 (!GetFlag(LL_IMPACTEDBYFLOATERS)) {
|
|
#ifdef NOISY_CAN_PLACE_FRAME
|
|
printf(" ==> not-safe and not-impacted fits: ");
|
|
while (nsnull != psd) {
|
|
printf("<psd=%p x=%d left=%d> ", psd, psd->mX, psd->mLeftEdge);
|
|
psd = psd->mParent;
|
|
}
|
|
printf("\n");
|
|
#endif
|
|
return PR_TRUE;
|
|
}
|
|
else if (GetFlag(LL_LASTFLOATERWASLETTERFRAME)) {
|
|
// Another special case: see if the floater is a letter
|
|
// frame. If it is, then allow the frame next to it to fit.
|
|
if (pfd->GetFlag(PFD_ISNONEMPTYTEXTFRAME)) {
|
|
// This must be the first piece of non-empty text (because
|
|
// aNotSafeToBreak is true) or its a piece of text that is
|
|
// part of a larger word.
|
|
pfd->SetFlag(PFD_ISSTICKY, PR_TRUE);
|
|
}
|
|
else if (pfd->mSpan) {
|
|
PerFrameData* pf = pfd->mSpan->mFirstFrame;
|
|
while (pf) {
|
|
if (pf->GetFlag(PFD_ISSTICKY)) {
|
|
// If one of the spans children was sticky then the span
|
|
// itself is sticky.
|
|
pfd->SetFlag(PFD_ISSTICKY, PR_TRUE);
|
|
}
|
|
pf = pf->mNext;
|
|
}
|
|
}
|
|
|
|
if (pfd->GetFlag(PFD_ISSTICKY)) {
|
|
#ifdef NOISY_CAN_PLACE_FRAME
|
|
printf(" ==> last floater was letter frame && frame is sticky\n");
|
|
#endif
|
|
return PR_TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
// If this is a piece of text inside a letter frame...
|
|
if (pfd->GetFlag(PFD_ISNONEMPTYTEXTFRAME)) {
|
|
if (psd->mFrame && psd->mFrame->GetFlag(PFD_ISLETTERFRAME)) {
|
|
nsIFrame* prevInFlow;
|
|
psd->mFrame->mFrame->GetPrevInFlow(&prevInFlow);
|
|
if (prevInFlow) {
|
|
nsIFrame* prevPrevInFlow;
|
|
prevInFlow->GetPrevInFlow(&prevPrevInFlow);
|
|
if (!prevPrevInFlow) {
|
|
// And it's the first continuation of the letter frame...
|
|
// Then make sure that the text fits
|
|
return PR_TRUE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else if (pfd->GetFlag(PFD_ISLETTERFRAME)) {
|
|
// If this is the first continuation of the letter frame...
|
|
nsIFrame* prevInFlow;
|
|
pfd->mFrame->GetPrevInFlow(&prevInFlow);
|
|
if (prevInFlow) {
|
|
nsIFrame* prevPrevInFlow;
|
|
prevInFlow->GetPrevInFlow(&prevPrevInFlow);
|
|
if (!prevPrevInFlow) {
|
|
return PR_TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Special check for span frames
|
|
if (pfd->mSpan && pfd->mSpan->mContainsFloater) {
|
|
// If the span either directly or indirectly contains a floater then
|
|
// it fits. Why? It's kind of complicated, but here goes:
|
|
//
|
|
// 1. CanPlaceFrame is used for all frame placements on a line,
|
|
// and in a span. This includes recursively placement of frames
|
|
// inside of spans, and the span itself. Because the logic always
|
|
// checks for room before proceeding (the code above here), the
|
|
// only things on a line will be those things that "fit".
|
|
//
|
|
// 2. Before a floater is placed on a line, the line has to be empty
|
|
// (otherwise its a "below current line" flaoter and will be placed
|
|
// after the line).
|
|
//
|
|
// Therefore, if the span directly or indirectly has a floater
|
|
// then it means that at the time of the placement of the floater
|
|
// the line was empty. Because of #1, only the frames that fit can
|
|
// be added after that point, therefore we can assume that the
|
|
// current span being placed has fit.
|
|
//
|
|
// So how do we get here and have a span that should already fit
|
|
// and yet doesn't: Simple: span's that have the no-wrap attribute
|
|
// set on them and contain a floater and are placed where they
|
|
// don't naturally fit.
|
|
return PR_TRUE;
|
|
}
|
|
|
|
// Yet another special check. If the text happens to have started
|
|
// with a non-breaking space, then we make it sticky on its left
|
|
// edge...Which means that whatever piece of text we just formatted
|
|
// will be the piece that fits (the text frame logic knows to stop
|
|
// when it runs out of room).
|
|
if (pfd->GetFlag(PFD_ISNONEMPTYTEXTFRAME) && GetFlag(LL_TEXTSTARTSWITHNBSP)) {
|
|
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;
|
|
|
|
// If the band was updated during the reflow of that frame then we
|
|
// need to adjust any prior frames that were reflowed.
|
|
if (GetFlag(LL_UPDATEDBAND) && InBlockContext()) {
|
|
UpdateFrames();
|
|
SetFlag(LL_UPDATEDBAND, 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 ((!GetFlag(LL_UNDERSTANDSNWHITESPACE)) && pfd->mBounds.width) {
|
|
SetFlag(LL_ENDSINWHITESPACE, PR_FALSE);
|
|
}
|
|
|
|
// Count the number of frames on the line...
|
|
mTotalPlacedFrames++;
|
|
if (psd->mX != psd->mLeftEdge || pfd->mBounds.x != 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.
|
|
SetFlag(LL_CANPLACEFLOATER, 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->mFlags = 0; // all flags default to false
|
|
pfd->SetFlag(PFD_ISBULLET, PR_TRUE);
|
|
pfd->mAscent = aMetrics.ascent;
|
|
pfd->mDescent = aMetrics.descent;
|
|
|
|
// Note: y value will be updated during vertical alignment
|
|
aFrame->GetRect(pfd->mBounds);
|
|
pfd->mCombinedArea = aMetrics.mOverflowArea;
|
|
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", NS_STATIC_CAST(void*, 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
|
|
|
|
PRBool
|
|
nsLineLayout::IsPercentageUnitSides(const nsStyleSides* aSides)
|
|
{
|
|
return eStyleUnit_Percent == aSides->GetLeftUnit()
|
|
|| eStyleUnit_Percent == aSides->GetRightUnit()
|
|
|| eStyleUnit_Percent == aSides->GetTopUnit()
|
|
|| eStyleUnit_Percent == aSides->GetBottomUnit();
|
|
}
|
|
|
|
PRBool
|
|
nsLineLayout::IsPercentageAwareReplacedElement(nsIPresContext *aPresContext,
|
|
nsIFrame* aFrame)
|
|
{
|
|
nsFrameState frameState;
|
|
aFrame->GetFrameState(&frameState);
|
|
if (frameState & NS_FRAME_REPLACED_ELEMENT)
|
|
{
|
|
nsCOMPtr<nsIAtom> frameType;
|
|
aFrame->GetFrameType(getter_AddRefs(frameType));
|
|
if (nsLayoutAtoms::brFrame != frameType.get() &&
|
|
nsLayoutAtoms::textFrame != frameType.get())
|
|
{
|
|
nsresult rv;
|
|
const nsStyleMargin* margin;
|
|
rv = aFrame->GetStyleData(eStyleStruct_Margin,(const nsStyleStruct*&) margin);
|
|
if (NS_FAILED(rv)) {
|
|
return PR_TRUE; // just to be on the safe side
|
|
}
|
|
if (IsPercentageUnitSides(&margin->mMargin)) {
|
|
return PR_TRUE;
|
|
}
|
|
|
|
const nsStylePadding* padding;
|
|
rv = aFrame->GetStyleData(eStyleStruct_Padding,(const nsStyleStruct*&) padding);
|
|
if (NS_FAILED(rv)) {
|
|
return PR_TRUE; // just to be on the safe side
|
|
}
|
|
if (IsPercentageUnitSides(&padding->mPadding)) {
|
|
return PR_TRUE;
|
|
}
|
|
|
|
const nsStyleBorder* border;
|
|
rv = aFrame->GetStyleData(eStyleStruct_Border,(const nsStyleStruct*&) border);
|
|
if (NS_FAILED(rv)) {
|
|
return PR_TRUE; // just to be on the safe side
|
|
}
|
|
if (IsPercentageUnitSides(&border->mBorder)) {
|
|
return PR_TRUE;
|
|
}
|
|
|
|
const nsStylePosition* pos;
|
|
rv = aFrame->GetStyleData(eStyleStruct_Position,(const nsStyleStruct*&) pos);
|
|
if (NS_FAILED(rv)) {
|
|
return PR_TRUE; // just to be on the safe side
|
|
}
|
|
|
|
if (eStyleUnit_Percent == pos->mWidth.GetUnit()
|
|
|| eStyleUnit_Percent == pos->mMaxWidth.GetUnit()
|
|
|| eStyleUnit_Percent == pos->mMinWidth.GetUnit()
|
|
|| eStyleUnit_Percent == pos->mHeight.GetUnit()
|
|
|| eStyleUnit_Percent == pos->mMinHeight.GetUnit()
|
|
|| eStyleUnit_Percent == pos->mMaxHeight.GetUnit()
|
|
|| IsPercentageUnitSides(&pos->mOffset)) { // XXX need more here!!!
|
|
return PR_TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
return PR_FALSE;
|
|
}
|
|
|
|
PRBool IsPercentageAwareFrame(nsIPresContext *aPresContext, nsIFrame *aFrame)
|
|
{
|
|
nsFrameState childFrameState;
|
|
aFrame->GetFrameState(&childFrameState);
|
|
if (childFrameState & NS_FRAME_REPLACED_ELEMENT) {
|
|
if (nsLineLayout::IsPercentageAwareReplacedElement(aPresContext, aFrame)) {
|
|
return PR_TRUE;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
nsIFrame *child;
|
|
aFrame->FirstChild(aPresContext, nsnull, &child);
|
|
if (child)
|
|
{ // aFrame is an inline container frame, check my frame state
|
|
if (childFrameState & NS_INLINE_FRAME_CONTAINS_PERCENT_AWARE_CHILD) {
|
|
return PR_TRUE;
|
|
}
|
|
}
|
|
// else it's a frame we just don't care about
|
|
}
|
|
return PR_FALSE;
|
|
}
|
|
|
|
|
|
void
|
|
nsLineLayout::VerticalAlignLine(nsLineBox* aLineBox,
|
|
nsSize& aMaxElementSizeResult,
|
|
nscoord& aLineBoxAscent)
|
|
{
|
|
// 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;
|
|
mLineBox = aLineBox;
|
|
|
|
// 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 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(" [line]==> 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
|
|
// (propagate it upward too)
|
|
PerFrameData* pfd = psd->mFirstFrame;
|
|
nscoord maxElementWidth = 0;
|
|
nscoord maxElementHeight = 0;
|
|
PRBool prevFrameAccumulates = PR_FALSE;
|
|
nscoord accumulatedWidth = 0;
|
|
#ifdef HACK_MEW
|
|
PRBool strictMode = InStrictMode();
|
|
PRBool inUnconstrainedTable = InUnconstrainedTableCell(*mBlockReflowState);
|
|
#endif
|
|
#ifdef DEBUG
|
|
int frameCount = 0;
|
|
#endif
|
|
|
|
nscoord indent = mTextIndent; // Used for the first frame.
|
|
|
|
while (nsnull != pfd) {
|
|
|
|
// Compute max-element-size if necessary
|
|
if (mComputeMaxElementSize) {
|
|
|
|
nscoord mw = pfd->mMaxElementSize.width +
|
|
pfd->mMargin.left + pfd->mMargin.right + indent;
|
|
// Zero |indent| after including the 'text-indent' only for the
|
|
// frame that is indented.
|
|
indent = 0;
|
|
|
|
if (psd->mNoWrap) {
|
|
maxElementWidth += mw;
|
|
}
|
|
else {
|
|
|
|
#ifdef HACK_MEW
|
|
|
|
#ifdef DEBUG
|
|
if (nsBlockFrame::gNoisyMaxElementSize)
|
|
frameCount++;
|
|
#endif
|
|
// if in Quirks mode and in a table cell with an unconstrained width, then emulate an IE
|
|
// quirk to keep consecutive images from breaking the line
|
|
// - see bugs 54565, 32191, and their many dups
|
|
// XXX - reconsider how textFrame text measurement happens and have it take into account
|
|
// image frames as well, thus eliminating the need for this code
|
|
if (!strictMode && inUnconstrainedTable ) {
|
|
|
|
nscoord imgSizes = AccumulateImageSizes(*mPresContext, *pfd->mFrame);
|
|
PRBool curFrameAccumulates = (imgSizes > 0) ||
|
|
(pfd->mMaxElementSize.width == pfd->mCombinedArea.width &&
|
|
pfd->GetFlag(PFD_ISNONWHITESPACETEXTFRAME));
|
|
// NOTE: we check for the maxElementWidth == the CombinedAreaWidth to detect when
|
|
// a textframe has whitespace in it and thus should not be used as the basis
|
|
// for accumulating the image width
|
|
// - this is to handle images in a text run
|
|
|
|
if(prevFrameAccumulates && curFrameAccumulates) {
|
|
accumulatedWidth += mw;
|
|
} else {
|
|
accumulatedWidth = mw;
|
|
}
|
|
// now update the prevFrame
|
|
prevFrameAccumulates = curFrameAccumulates;
|
|
|
|
#ifdef DEBUG
|
|
if (nsBlockFrame::gNoisyMaxElementSize) {
|
|
nsFrame::IndentBy(stdout, nsBlockFrame::gNoiseIndent);
|
|
printf("(%d) last frame's MEW=%d | Accumulated MEW=%d\n", frameCount, mw, accumulatedWidth);
|
|
}
|
|
#endif
|
|
|
|
mw = accumulatedWidth;
|
|
}
|
|
|
|
#endif // HACK_MEW
|
|
|
|
// and finally reset the max element width
|
|
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(mPresContext, pfd->mBounds);
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
printf(" [child of line]");
|
|
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);
|
|
}
|
|
// check to see if the frame is an inline replace element
|
|
// and if it is percent-aware. If so, mark the line.
|
|
if ((PR_FALSE==aLineBox->ResizeReflowOptimizationDisabled()) &&
|
|
pfd->mFrameType & NS_CSS_FRAME_TYPE_INLINE)
|
|
{
|
|
if (IsPercentageAwareFrame(mPresContext, pfd->mFrame))
|
|
aLineBox->DisableResizeReflowOptimization();
|
|
}
|
|
pfd = pfd->mNext;
|
|
}
|
|
|
|
// Fill in returned line-box and max-element-size data
|
|
aLineBox->mBounds.x = psd->mLeftEdge;
|
|
aLineBox->mBounds.y = mTopEdge;
|
|
aLineBox->mBounds.width = psd->mX - psd->mLeftEdge;
|
|
aLineBox->mBounds.height = lineHeight;
|
|
mFinalLineHeight = lineHeight;
|
|
aMaxElementSizeResult.width = maxElementWidth;
|
|
aMaxElementSizeResult.height = maxElementHeight;
|
|
aLineBoxAscent = baselineY;
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
printf(
|
|
" [line]==> bounds{x,y,w,h}={%d,%d,%d,%d} lh=%d a=%d mes{w,h}={%d,%d}\n",
|
|
aLineBox->mBounds.x, aLineBox->mBounds.y,
|
|
aLineBox->mBounds.width, aLineBox->mBounds.height,
|
|
mFinalLineHeight, aLineBoxAscent,
|
|
aMaxElementSizeResult.width, aMaxElementSizeResult.height);
|
|
#endif
|
|
|
|
// Undo root-span mFrame pointer to prevent brane damage later on...
|
|
mRootSpan->mFrame = nsnull;
|
|
mLineBox = 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(mPresContext, 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(mPresContext, 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;
|
|
}
|
|
}
|
|
|
|
#define VERTICAL_ALIGN_FRAMES_NO_MINIMUM 32767
|
|
#define VERTICAL_ALIGN_FRAMES_NO_MAXIMUM -32768
|
|
|
|
// 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* spanFramePFD = psd->mFrame;
|
|
nsIFrame* spanFrame = spanFramePFD->mFrame;
|
|
|
|
// Get the parent frame's font for all of the frames in this span
|
|
nsCOMPtr<nsIStyleContext> styleContext;
|
|
spanFrame->GetStyleContext(getter_AddRefs(styleContext));
|
|
nsIRenderingContext* rc = mBlockReflowState->rendContext;
|
|
SetFontFromStyle(mBlockReflowState->rendContext, styleContext);
|
|
nsCOMPtr<nsIFontMetrics> fm;
|
|
rc->GetFontMetrics(*getter_AddRefs(fm));
|
|
|
|
PRBool preMode = (mStyleText->mWhiteSpace == NS_STYLE_WHITESPACE_PRE) ||
|
|
(mStyleText->mWhiteSpace == NS_STYLE_WHITESPACE_MOZ_PRE_WRAP);
|
|
|
|
// See if the span is an empty continuation. It's an empty continuation iff:
|
|
// - it has a prev-in-flow
|
|
// - it has no next in flow
|
|
// - it's zero sized
|
|
nsIFrame* spanNextInFlow;
|
|
spanFrame->GetNextInFlow(&spanNextInFlow);
|
|
nsIFrame* spanPrevInFlow;
|
|
spanFrame->GetPrevInFlow(&spanPrevInFlow);
|
|
PRBool emptyContinuation = spanPrevInFlow && !spanNextInFlow &&
|
|
(0 == spanFramePFD->mBounds.width) && (0 == spanFramePFD->mBounds.height);
|
|
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
printf("[%sSpan]", (psd == mRootSpan)?"Root":"");
|
|
nsFrame::ListTag(stdout, spanFrame);
|
|
printf(": preMode=%s strictMode=%s w/h=%d,%d emptyContinuation=%s",
|
|
preMode ? "yes" : "no",
|
|
InStrictMode() ? "yes" : "no",
|
|
spanFramePFD->mBounds.width, spanFramePFD->mBounds.height,
|
|
emptyContinuation ? "yes" : "no");
|
|
if (psd != mRootSpan) {
|
|
printf(" bp=%d,%d,%d,%d margin=%d,%d,%d,%d",
|
|
spanFramePFD->mBorderPadding.top,
|
|
spanFramePFD->mBorderPadding.right,
|
|
spanFramePFD->mBorderPadding.bottom,
|
|
spanFramePFD->mBorderPadding.left,
|
|
spanFramePFD->mMargin.top,
|
|
spanFramePFD->mMargin.right,
|
|
spanFramePFD->mMargin.bottom,
|
|
spanFramePFD->mMargin.left);
|
|
}
|
|
printf("\n");
|
|
#endif
|
|
|
|
// Compute the span's mZeroEffectiveSpanBox flag. What we are trying
|
|
// to determine is how we should treat the span: should it act
|
|
// "normally" according to css2 or should it effectively
|
|
// "disappear".
|
|
//
|
|
// In general, if the document being processed is in full standards
|
|
// mode then it should act normally (with one exception). The
|
|
// exception case is when a span is continued and yet the span is
|
|
// empty (e.g. compressed whitespace). For this kind of span we treat
|
|
// it as if it were not there so that it doesn't impact the
|
|
// line-height.
|
|
//
|
|
// In almost standards mode or quirks mode, we should sometimes make
|
|
// it disappear. The cases that matter are those where the span
|
|
// contains no real text elements that would provide an ascent and
|
|
// descent and height. However, if css style elements have been
|
|
// applied to the span (border/padding/margin) so that it's clear the
|
|
// document author is intending css2 behavior then we act as if strict
|
|
// mode is set.
|
|
//
|
|
// This code works correctly for preMode, because a blank line
|
|
// in PRE mode is encoded as a text node with a LF in it, since
|
|
// text nodes with only whitespace are considered in preMode.
|
|
//
|
|
// Much of this logic is shared with the various implementations of
|
|
// nsIFrame::IsEmpty since they need to duplicate the way it makes
|
|
// some lines empty. However, nsIFrame::IsEmpty can't be reused here
|
|
// since this code sets zeroEffectiveSpanBox even when there are
|
|
// non-empty children.
|
|
PRBool zeroEffectiveSpanBox = PR_FALSE;
|
|
// XXXldb If we really have empty continuations, then all these other
|
|
// checks don't make sense for them.
|
|
if ((emptyContinuation || mCompatMode != eCompatibility_FullStandards) &&
|
|
((psd == mRootSpan) ||
|
|
((0 == spanFramePFD->mBorderPadding.top) &&
|
|
(0 == spanFramePFD->mBorderPadding.right) &&
|
|
(0 == spanFramePFD->mBorderPadding.bottom) &&
|
|
(0 == spanFramePFD->mBorderPadding.left) &&
|
|
(0 == spanFramePFD->mMargin.top) &&
|
|
(0 == spanFramePFD->mMargin.right) &&
|
|
(0 == spanFramePFD->mMargin.bottom) &&
|
|
(0 == spanFramePFD->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 then we don't use this logic.
|
|
// However, this is not propagated outwards, since (in compatibility
|
|
// mode) we don't want big line heights for things like
|
|
// <p><font size="-1">Text</font></p>
|
|
|
|
// Don't include any initial whitespace, unless we're preformatted.
|
|
// See bug 134580.
|
|
PRUint32 flag = preMode ? PFD_ISTEXTFRAME : PFD_ISNONWHITESPACETEXTFRAME;
|
|
zeroEffectiveSpanBox = PR_TRUE;
|
|
for (PerFrameData* pfd = psd->mFirstFrame; pfd; pfd = pfd->mNext) {
|
|
if (pfd->GetFlag(flag)) {
|
|
zeroEffectiveSpanBox = PR_FALSE;
|
|
break;
|
|
}
|
|
// The line could begin with multiple all-whitespace text frames,
|
|
// and we need to ignore all of them, including those contained
|
|
// within other inline frames.
|
|
if (flag != PFD_ISTEXTFRAME) {
|
|
PRBool empty;
|
|
pfd->mFrame->IsEmpty(mCompatMode, preMode, &empty);
|
|
if (!empty) {
|
|
flag = PFD_ISTEXTFRAME;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
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 = 0;
|
|
minY = VERTICAL_ALIGN_FRAMES_NO_MINIMUM;
|
|
maxY = VERTICAL_ALIGN_FRAMES_NO_MAXIMUM;
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
printf("[RootSpan]");
|
|
nsFrame::ListTag(stdout, spanFrame);
|
|
printf(": pass1 valign frames: topEdge=%d minLineHeight=%d zeroEffectiveSpanBox=%s\n",
|
|
mTopEdge, mMinLineHeight,
|
|
zeroEffectiveSpanBox ? "yes" : "no");
|
|
#endif
|
|
}
|
|
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, spanFrame);
|
|
nscoord contentHeight = spanFramePFD->mBounds.height -
|
|
spanFramePFD->mBorderPadding.top - spanFramePFD->mBorderPadding.bottom;
|
|
nscoord leading = logicalHeight - contentHeight;
|
|
psd->mTopLeading = leading / 2;
|
|
psd->mBottomLeading = leading - psd->mTopLeading;
|
|
psd->mLogicalHeight = logicalHeight;
|
|
|
|
if (zeroEffectiveSpanBox) {
|
|
// When the span-box is to be ignored, zero out 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.
|
|
|
|
// Note that things are readjusted for this span after its children
|
|
// are reflowed
|
|
minY = VERTICAL_ALIGN_FRAMES_NO_MINIMUM;
|
|
maxY = VERTICAL_ALIGN_FRAMES_NO_MAXIMUM;
|
|
}
|
|
else {
|
|
|
|
// 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 = spanFramePFD->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 = spanFramePFD->mAscent;
|
|
|
|
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
printf("[%sSpan]", (psd == mRootSpan)?"Root":"");
|
|
nsFrame::ListTag(stdout, spanFrame);
|
|
printf(": baseLine=%d logicalHeight=%d topLeading=%d h=%d bp=%d,%d zeroEffectiveSpanBox=%s\n",
|
|
baselineY, psd->mLogicalHeight, psd->mTopLeading,
|
|
spanFramePFD->mBounds.height,
|
|
spanFramePFD->mBorderPadding.top, spanFramePFD->mBorderPadding.bottom,
|
|
zeroEffectiveSpanBox ? "yes" : "no");
|
|
#endif
|
|
}
|
|
|
|
nscoord maxTopBoxHeight = 0;
|
|
nscoord maxBottomBoxHeight = 0;
|
|
PerFrameData* pfd = psd->mFirstFrame;
|
|
while (nsnull != pfd) {
|
|
nsIFrame* frame = pfd->mFrame;
|
|
|
|
// sanity check (see bug 105168, non-reproducable crashes from null frame)
|
|
NS_ASSERTION(frame, "null frame in PerFrameData - something is very very bad");
|
|
if (!frame) {
|
|
return;
|
|
}
|
|
|
|
// 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 nsStyleTextReset* textStyle;
|
|
frame->GetStyleData(eStyleStruct_TextReset, (const nsStyleStruct*&)textStyle);
|
|
nsStyleUnit verticalAlignUnit = textStyle->mVerticalAlign.GetUnit();
|
|
#ifdef DEBUG
|
|
if (eStyleUnit_Inherit == verticalAlignUnit) {
|
|
printf("XXX: vertical-align: inherit not implemented for ");
|
|
nsFrame::ListTag(stdout, frame);
|
|
printf("\n");
|
|
}
|
|
#endif
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
printf(" [frame]");
|
|
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).
|
|
// XXXrbs -- relax this restriction because it causes text frames
|
|
// to jam together when 'font-size-adjust' is enabled
|
|
// and layout is using dynamic font heights (bug 20394)
|
|
// -- Note #1: With this code enabled and with the fact that we are not
|
|
// using Em[Ascent|Descent] as nsDimensions for text metrics in
|
|
// GFX mean that the discussion in bug 13072 cannot hold.
|
|
// -- Note #2: We still don't want empty-text frames to interfere.
|
|
// For example in quirks mode, avoiding empty text frames prevents
|
|
// "tall" lines around elements like <hr> since the rules of <hr>
|
|
// in quirks.css have pseudo text contents with LF in them.
|
|
#if 0
|
|
if (!pfd->GetFlag(PFD_ISTEXTFRAME)) {
|
|
#else
|
|
// Only consider non empty text frames when line-height=normal
|
|
PRBool canUpdate = !pfd->GetFlag(PFD_ISTEXTFRAME);
|
|
if (!canUpdate && pfd->GetFlag(PFD_ISNONWHITESPACETEXTFRAME)) {
|
|
const nsStyleText* textStyle;
|
|
frame->GetStyleData(eStyleStruct_Text, (const nsStyleStruct*&)textStyle);
|
|
canUpdate = textStyle->mLineHeight.GetUnit() == eStyleUnit_Normal ||
|
|
textStyle->mLineHeight.GetUnit() == eStyleUnit_Null;
|
|
}
|
|
if (canUpdate) {
|
|
#endif
|
|
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 (!preMode && !InStrictMode() && !logicalHeight ) {
|
|
// Check if it's a BR frame that is not alone on its line (it
|
|
// is given a height of zero to indicate this), and if so reset
|
|
// yTop and yBottom so that BR frames don't influence the line.
|
|
nsCOMPtr<nsIAtom> frameType;
|
|
frame->GetFrameType(getter_AddRefs(frameType));
|
|
if (nsLayoutAtoms::brFrame == frameType.get()) {
|
|
yTop = VERTICAL_ALIGN_FRAMES_NO_MINIMUM;
|
|
yBottom = VERTICAL_ALIGN_FRAMES_NO_MAXIMUM;
|
|
}
|
|
}
|
|
if (yTop < minY) minY = yTop;
|
|
if (yBottom > maxY) maxY = yBottom;
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
printf(" [frame]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(mPresContext, pfd->mBounds);
|
|
}
|
|
}
|
|
pfd = pfd->mNext;
|
|
}
|
|
|
|
// Factor in the minimum line-height when handling the root-span for
|
|
// the block.
|
|
if (psd == mRootSpan) {
|
|
// We should factor in the block element's minimum line-height (as
|
|
// defined in section 10.8.1 of the css2 spec) assuming that
|
|
// mZeroEffectiveSpanBox is not set on the root span. This only happens
|
|
// in some cases in quirks mode:
|
|
// (1) if the root span contains non-whitespace text directly (this
|
|
// is handled by mZeroEffectiveSpanBox
|
|
// (2) if this is the first line of an LI element (whether or not
|
|
// there is a bullet (NN4/IE5 quirk)
|
|
// (3) if this is the last line of an LI, DT, or DD element
|
|
// (The last line before a block also counts, but not before a
|
|
// BR) (NN4/IE5 quirk)
|
|
PRBool applyMinLH = !(psd->mZeroEffectiveSpanBox); // (1) above
|
|
PRBool isFirstLine = !mLineNumber; // if the line number is 0
|
|
PRBool isLastLine = (!mLineBox->IsLineWrapped() && !GetFlag(LL_LINEENDSINBR));
|
|
PRBool foundLI = PR_FALSE; // hack to fix bug 50480.
|
|
//XXX: rather than remembering if we've found an LI, we really should be checking
|
|
// for the existence of a bullet frame. Likewise, the code below should not
|
|
// be checking for any particular content tag type, but rather should
|
|
// be checking for the existence of a bullet frame to determine if it's a list element or not.
|
|
if (!applyMinLH && (isFirstLine || isLastLine)) {
|
|
nsCOMPtr<nsIContent> blockContent;
|
|
nsresult result = mRootSpan->mFrame->mFrame->GetContent(getter_AddRefs(blockContent));
|
|
if ( NS_SUCCEEDED(result) && blockContent) {
|
|
nsCOMPtr<nsIAtom> blockTagAtom;
|
|
result = blockContent->GetTag(*(getter_AddRefs(blockTagAtom)));
|
|
if ( NS_SUCCEEDED(result) && blockTagAtom) {
|
|
// (2) above, if the first line of LI
|
|
if (isFirstLine && blockTagAtom.get() == nsHTMLAtoms::li) {
|
|
// if the line is empty, then don't force the min height (see bug 75963)
|
|
if (!IsZeroHeight()) {
|
|
applyMinLH = PR_TRUE;
|
|
foundLI = PR_TRUE;
|
|
}
|
|
}
|
|
// (3) above, if the last line of LI, DT, or DD
|
|
else if (!applyMinLH && isLastLine &&
|
|
((blockTagAtom.get() == nsHTMLAtoms::li) ||
|
|
(blockTagAtom.get() == nsHTMLAtoms::dt) ||
|
|
(blockTagAtom.get() == nsHTMLAtoms::dd))) {
|
|
applyMinLH = PR_TRUE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (applyMinLH) {
|
|
if ((psd->mX != psd->mLeftEdge) || preMode || foundLI) {
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
printf(" [span]==> adjusting min/maxY: currentValues: %d,%d", minY, maxY);
|
|
#endif
|
|
nscoord minimumLineHeight = mMinLineHeight;
|
|
nscoord fontAscent, fontHeight;
|
|
fm->GetMaxAscent(fontAscent);
|
|
if (nsHTMLReflowState::UseComputedHeight()) {
|
|
const nsStyleFont* parentFont;
|
|
spanFrame->GetStyleData(eStyleStruct_Font, (const nsStyleStruct*&)parentFont);
|
|
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)
|
|
|
|
// XXX Are there other problems with this?
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
printf(" [span]==> zapping min/maxY: currentValues: %d,%d newValues: 0,0\n",
|
|
minY, maxY);
|
|
#endif
|
|
minY = maxY = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ((minY == VERTICAL_ALIGN_FRAMES_NO_MINIMUM) ||
|
|
(maxY == VERTICAL_ALIGN_FRAMES_NO_MINIMUM)) {
|
|
minY = maxY = baselineY;
|
|
}
|
|
|
|
if ((psd != mRootSpan) && (psd->mZeroEffectiveSpanBox)) {
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
printf(" [span]adjusting for zeroEffectiveSpanBox\n");
|
|
printf(" Original: minY=%d, maxY=%d, height=%d, ascent=%d, descent=%d, logicalHeight=%d, topLeading=%d, bottomLeading=%d\n",
|
|
minY, maxY, spanFramePFD->mBounds.height,
|
|
spanFramePFD->mAscent, spanFramePFD->mDescent,
|
|
psd->mLogicalHeight, psd->mTopLeading, psd->mBottomLeading);
|
|
#endif
|
|
nscoord goodMinY = spanFramePFD->mBorderPadding.top - psd->mTopLeading;
|
|
nscoord goodMaxY = goodMinY + psd->mLogicalHeight;
|
|
if (minY > goodMinY) {
|
|
nscoord adjust = minY - goodMinY; // positive
|
|
|
|
// shrink the logical extents
|
|
psd->mLogicalHeight -= adjust;
|
|
psd->mTopLeading -= adjust;
|
|
}
|
|
if (maxY < goodMaxY) {
|
|
nscoord adjust = goodMaxY - maxY;
|
|
psd->mLogicalHeight -= adjust;
|
|
psd->mBottomLeading -= adjust;
|
|
}
|
|
if (minY > 0) {
|
|
|
|
// shrink the content by moving its top down. This is tricky, since
|
|
// the top is the 0 for many coordinates, so what we do is
|
|
// move everything else up.
|
|
spanFramePFD->mAscent -= minY; // move the baseline up
|
|
spanFramePFD->mBounds.height -= minY; // move the bottom up
|
|
psd->mTopLeading += minY;
|
|
|
|
pfd = psd->mFirstFrame;
|
|
while (nsnull != pfd) {
|
|
pfd->mBounds.y -= minY; // move all the children back up
|
|
pfd->mFrame->SetRect(mPresContext, pfd->mBounds);
|
|
pfd = pfd->mNext;
|
|
}
|
|
maxY -= minY; // since minY is in the frame's own coordinate system
|
|
minY = 0;
|
|
}
|
|
if (maxY < spanFramePFD->mBounds.height) {
|
|
nscoord adjust = spanFramePFD->mBounds.height - maxY;
|
|
spanFramePFD->mBounds.height -= adjust; // move the bottom up
|
|
spanFramePFD->mDescent -= adjust;
|
|
psd->mBottomLeading += adjust;
|
|
}
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
printf(" New: minY=%d, maxY=%d, height=%d, ascent=%d, descent=%d, logicalHeight=%d, topLeading=%d, bottomLeading=%d\n",
|
|
minY, maxY, spanFramePFD->mBounds.height,
|
|
spanFramePFD->mAscent, spanFramePFD->mDescent,
|
|
psd->mLogicalHeight, psd->mTopLeading, psd->mBottomLeading);
|
|
#endif
|
|
}
|
|
|
|
psd->mMinY = minY;
|
|
psd->mMaxY = maxY;
|
|
#ifdef NOISY_VERTICAL_ALIGN
|
|
printf(" [span]==> 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)
|
|
{
|
|
#ifndef IBMBIDI
|
|
// XXX what about NS_STYLE_DIRECTION_RTL?
|
|
if (NS_STYLE_DIRECTION_RTL == psd->mDirection) {
|
|
*aDeltaWidth = 0;
|
|
return PR_TRUE;
|
|
}
|
|
#endif
|
|
|
|
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(mPresContext, 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->GetFlag(PFD_ISTEXTFRAME)) {
|
|
// 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->GetFlag(PFD_ISNONEMPTYTEXTFRAME)) {
|
|
nscoord deltaWidth = 0;
|
|
pfd->mFrame->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) {
|
|
if (pfd->mJustificationNumSpaces > 0) {
|
|
pfd->mJustificationNumSpaces--;
|
|
}
|
|
|
|
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(mPresContext, 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::ComputeJustificationWeights(PerSpanData* aPSD,
|
|
PRInt32* aNumSpaces,
|
|
PRInt32* aNumLetters)
|
|
{
|
|
NS_ASSERTION(aPSD, "null arg");
|
|
NS_ASSERTION(aNumSpaces, "null arg");
|
|
NS_ASSERTION(aNumLetters, "null arg");
|
|
PRInt32 numSpaces = 0;
|
|
PRInt32 numLetters = 0;
|
|
|
|
for (PerFrameData* pfd = aPSD->mFirstFrame; pfd != nsnull; pfd = pfd->mNext) {
|
|
|
|
if (PR_TRUE == pfd->GetFlag(PFD_ISTEXTFRAME)) {
|
|
numSpaces += pfd->mJustificationNumSpaces;
|
|
numLetters += pfd->mJustificationNumLetters;
|
|
}
|
|
else if (pfd->mSpan != nsnull) {
|
|
PRInt32 spanSpaces;
|
|
PRInt32 spanLetters;
|
|
|
|
ComputeJustificationWeights(pfd->mSpan, &spanSpaces, &spanLetters);
|
|
|
|
numSpaces += spanSpaces;
|
|
numLetters += spanLetters;
|
|
}
|
|
}
|
|
|
|
*aNumSpaces = numSpaces;
|
|
*aNumLetters = numLetters;
|
|
}
|
|
|
|
nscoord
|
|
nsLineLayout::ApplyFrameJustification(PerSpanData* aPSD, FrameJustificationState* aState)
|
|
{
|
|
NS_ASSERTION(aPSD, "null arg");
|
|
NS_ASSERTION(aState, "null arg");
|
|
|
|
nscoord deltaX = 0;
|
|
for (PerFrameData* pfd = aPSD->mFirstFrame; pfd != nsnull; pfd = pfd->mNext) {
|
|
// Don't reposition bullets (and other frames that occur out of X-order?)
|
|
if (!pfd->GetFlag(PFD_ISBULLET)) {
|
|
nscoord dw = 0;
|
|
|
|
pfd->mBounds.x += deltaX;
|
|
|
|
if (PR_TRUE == pfd->GetFlag(PFD_ISTEXTFRAME)) {
|
|
if (aState->mTotalWidthForSpaces > 0 &&
|
|
aState->mTotalNumSpaces > 0 && // we divide by this value, so must be non-zero
|
|
aState->mTotalNumLetters >0 // we divide by this value, so must be non-zero
|
|
) {
|
|
aState->mNumSpacesProcessed += pfd->mJustificationNumSpaces;
|
|
|
|
nscoord newAllocatedWidthForSpaces =
|
|
(aState->mTotalWidthForSpaces*aState->mNumSpacesProcessed)
|
|
/aState->mTotalNumSpaces;
|
|
|
|
dw += newAllocatedWidthForSpaces - aState->mWidthForSpacesProcessed;
|
|
|
|
aState->mWidthForSpacesProcessed = newAllocatedWidthForSpaces;
|
|
}
|
|
|
|
if (aState->mTotalWidthForLetters > 0) {
|
|
aState->mNumLettersProcessed += pfd->mJustificationNumLetters;
|
|
|
|
nscoord newAllocatedWidthForLetters =
|
|
(aState->mTotalWidthForLetters*aState->mNumLettersProcessed)
|
|
/aState->mTotalNumLetters;
|
|
|
|
dw += newAllocatedWidthForLetters - aState->mWidthForLettersProcessed;
|
|
|
|
aState->mWidthForLettersProcessed = newAllocatedWidthForLetters;
|
|
}
|
|
}
|
|
else {
|
|
if (nsnull != pfd->mSpan) {
|
|
dw += ApplyFrameJustification(pfd->mSpan, aState);
|
|
}
|
|
}
|
|
|
|
pfd->mBounds.width += dw;
|
|
deltaX += dw;
|
|
pfd->mFrame->SetRect(mPresContext, pfd->mBounds);
|
|
}
|
|
}
|
|
return deltaX;
|
|
}
|
|
|
|
PRBool
|
|
nsLineLayout::HorizontalAlignFrames(nsRect& aLineBounds,
|
|
PRBool aAllowJustify,
|
|
PRBool aShrinkWrapWidth)
|
|
{
|
|
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 PR_TRUE;
|
|
}
|
|
#ifdef IBMBIDI
|
|
if (NS_STYLE_DIRECTION_RTL == psd->mDirection) {
|
|
// This is to ensure proper indentation (e.g. of list items)
|
|
availWidth -= aLineBounds.x;
|
|
}
|
|
else
|
|
#endif // IBMBIDI
|
|
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
|
|
#ifdef IBMBIDI
|
|
if (remainingWidth + aLineBounds.x > 0)
|
|
#else
|
|
// XXXldb What if it's less than 0??
|
|
if (remainingWidth > 0)
|
|
#endif
|
|
{
|
|
nscoord dx = 0;
|
|
PRUint32 textAlign = mTextAlign;
|
|
// here is where we do special adjustments for HR's
|
|
// see bug 18754
|
|
// This code is not sufficient because it doesn't handle HRs that
|
|
// are within inline elements. (We check the content node rather
|
|
// than the frame type due to the changes for bug 141054.)
|
|
if (!InStrictMode()) {
|
|
if (psd->mFirstFrame && psd->mFirstFrame->mFrame) {
|
|
nsCOMPtr<nsIContent> content;
|
|
psd->mFirstFrame->mFrame->GetContent(getter_AddRefs(content));
|
|
if (content) {
|
|
nsCOMPtr<nsIAtom> tag;
|
|
content->GetTag(*getter_AddRefs(tag));
|
|
if (tag == nsHTMLAtoms::hr) {
|
|
// get the alignment from the HR frame
|
|
const nsStyleMargin* margin;
|
|
psd->mFirstFrame->mFrame->GetStyleData(eStyleStruct_Margin,
|
|
(const nsStyleStruct*&)margin);
|
|
textAlign = NS_STYLE_TEXT_ALIGN_CENTER;
|
|
nsStyleCoord zero(nscoord(0));
|
|
nsStyleCoord temp;
|
|
if ((eStyleUnit_Coord==margin->mMargin.GetLeftUnit()) &&
|
|
(zero==margin->mMargin.GetLeft(temp)))
|
|
{
|
|
textAlign = NS_STYLE_TEXT_ALIGN_LEFT;
|
|
}
|
|
else if ((eStyleUnit_Coord==margin->mMargin.GetRightUnit()) &&
|
|
(zero==margin->mMargin.GetRight(temp))) {
|
|
textAlign = NS_STYLE_TEXT_ALIGN_RIGHT;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
switch (textAlign) {
|
|
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:
|
|
{
|
|
// fix for bug 50758
|
|
// right-aligned text in a text control doesn't know how to paint itself
|
|
// so we force the invalidate here. Getting the current line is quick,
|
|
// and at worst we're invalidating more of the line (and just that line) than we need to.
|
|
nsLineBox *currentLine=nsnull;
|
|
// use localResult because a failure here should not be propagated to my caller
|
|
nsresult localResult = nsBlockFrame::GetCurrentLine(mBlockRS, ¤tLine);
|
|
if (NS_SUCCEEDED(localResult) && currentLine) {
|
|
currentLine->SetForceInvalidate(PR_TRUE);
|
|
}
|
|
}
|
|
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) {
|
|
if (!aShrinkWrapWidth) {
|
|
PRInt32 numSpaces;
|
|
PRInt32 numLetters;
|
|
|
|
ComputeJustificationWeights(psd, &numSpaces, &numLetters);
|
|
|
|
if (numSpaces > 0) {
|
|
FrameJustificationState state = { numSpaces, numLetters, remainingWidth, 0, 0, 0, 0, 0 };
|
|
|
|
ApplyFrameJustification(psd, &state);
|
|
}
|
|
}
|
|
}
|
|
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;
|
|
}
|
|
#ifdef IBMBIDI
|
|
PerFrameData* lastPfd = psd->mLastFrame;
|
|
PerFrameData* bulletPfd = nsnull;
|
|
|
|
if (lastPfd->GetFlag(PFD_ISBULLET)
|
|
&& (NS_STYLE_DIRECTION_RTL == psd->mDirection) ) {
|
|
bulletPfd = lastPfd;
|
|
lastPfd = lastPfd->mPrev;
|
|
}
|
|
PRUint32 maxX = lastPfd->mBounds.XMost() + dx;
|
|
PRBool visualRTL = PR_FALSE;
|
|
|
|
if ( (NS_STYLE_DIRECTION_RTL == psd->mDirection)
|
|
&& (!psd->mChangedFrameDirection) ) {
|
|
psd->mChangedFrameDirection = PR_TRUE;
|
|
|
|
/* Assume that all frames have been right aligned.*/
|
|
if (aShrinkWrapWidth) {
|
|
return PR_FALSE;
|
|
}
|
|
mPresContext->IsVisualMode(visualRTL);
|
|
|
|
if (bulletPfd) {
|
|
bulletPfd->mBounds.x += maxX;
|
|
bulletPfd->mFrame->SetRect(mPresContext, bulletPfd->mBounds);
|
|
}
|
|
}
|
|
if ( (0 != dx) || (visualRTL) ) {
|
|
#else
|
|
if (0 != dx) {
|
|
#endif // IBMBIDI
|
|
// If we need to move the frames but we're shrink wrapping, then
|
|
// we need to wait until the final width is known
|
|
if (aShrinkWrapWidth) {
|
|
return PR_FALSE;
|
|
}
|
|
|
|
PerFrameData* pfd = psd->mFirstFrame;
|
|
#ifdef IBMBIDI
|
|
while ( (nsnull != pfd) && (bulletPfd != pfd) ) {
|
|
#else
|
|
while (nsnull != pfd) {
|
|
#endif // IBMBIDI
|
|
pfd->mBounds.x += dx;
|
|
#ifdef IBMBIDI
|
|
if (visualRTL) {
|
|
maxX = pfd->mBounds.x = maxX - (pfd->mMargin.left + pfd->mBounds.width + pfd->mMargin.right);
|
|
}
|
|
#endif // IBMBIDI
|
|
pfd->mFrame->SetRect(mPresContext, pfd->mBounds);
|
|
pfd = pfd->mNext;
|
|
}
|
|
#ifdef IBMBIDI
|
|
aLineBounds.x += dx;
|
|
#else
|
|
aLineBounds.width += dx;
|
|
#endif
|
|
}
|
|
#ifndef IBMBIDI
|
|
if ((NS_STYLE_DIRECTION_RTL == psd->mDirection) &&
|
|
!psd->mChangedFrameDirection) {
|
|
psd->mChangedFrameDirection = PR_TRUE;
|
|
|
|
/* Assume that all frames have been right aligned.*/
|
|
if (aShrinkWrapWidth) {
|
|
return PR_FALSE;
|
|
}
|
|
PerFrameData* pfd = psd->mFirstFrame;
|
|
PRUint32 maxX = psd->mRightEdge;
|
|
while (nsnull != pfd) {
|
|
pfd->mBounds.x = maxX - (pfd->mMargin.left + pfd->mBounds.width + pfd->mMargin.right);
|
|
pfd->mFrame->SetRect(mPresContext, pfd->mBounds);
|
|
maxX = pfd->mBounds.x;
|
|
pfd = pfd->mNext;
|
|
}
|
|
}
|
|
#endif // ndef IBMBIDI
|
|
}
|
|
|
|
return PR_TRUE;
|
|
}
|
|
|
|
void
|
|
nsLineLayout::RelativePositionFrames(nsRect& aCombinedArea)
|
|
{
|
|
RelativePositionFrames(mRootSpan, aCombinedArea);
|
|
}
|
|
|
|
void
|
|
nsLineLayout::RelativePositionFrames(PerSpanData* psd, nsRect& aCombinedArea)
|
|
{
|
|
nsPoint origin;
|
|
nsRect spanCombinedArea;
|
|
PerFrameData* pfd;
|
|
|
|
nscoord minX, minY, maxX, maxY;
|
|
if (nsnull != psd->mFrame) {
|
|
// The minimum combined area for the frames in a span covers the
|
|
// entire span frame.
|
|
pfd = psd->mFrame;
|
|
minX = 0;
|
|
minY = 0;
|
|
maxX = pfd->mBounds.width;
|
|
maxY = 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)
|
|
minX = psd->mLeftEdge;
|
|
maxX = psd->mX;
|
|
minY = mTopEdge;
|
|
maxY = 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->GetFlag(PFD_RELATIVEPOS)) {
|
|
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(mPresContext, 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);
|
|
}
|
|
|
|
// see bug 21415: we used to prevent empty inlines from impacting the
|
|
// size of the combined area, however that is wrong so now we allow
|
|
// empty inlines to contribute to the line's combined area.
|
|
// - the following comment is being preserved in case there are issues
|
|
// with floaters, as is alluded to.
|
|
#if 0
|
|
// 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) {
|
|
#else
|
|
if(PR_TRUE) {
|
|
#endif
|
|
nscoord xl = x + r->x;
|
|
nscoord xr = x + r->XMost();
|
|
if (xl < minX) {
|
|
minX = xl;
|
|
}
|
|
if (xr > maxX) {
|
|
maxX = xr;
|
|
}
|
|
nscoord yt = y + r->y;
|
|
nscoord yb = y + r->YMost();
|
|
if (yt < minY) {
|
|
minY = yt;
|
|
}
|
|
if (yb > maxY) {
|
|
maxY = yb;
|
|
}
|
|
updatedCombinedArea = PR_TRUE;
|
|
}
|
|
pfd = pfd->mNext;
|
|
}
|
|
|
|
// Compute aggregated combined area
|
|
if (updatedCombinedArea) {
|
|
aCombinedArea.x = minX;
|
|
aCombinedArea.y = minY;
|
|
aCombinedArea.width = maxX - minX;
|
|
aCombinedArea.height = maxY - minY;
|
|
}
|
|
else {
|
|
aCombinedArea.x = 0;
|
|
aCombinedArea.y = minY;
|
|
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 ((minX < 0) || (minY < 0) ||
|
|
(maxX > pfd->mBounds.width) || (maxY > pfd->mBounds.height)) {
|
|
newState |= NS_FRAME_OUTSIDE_CHILDREN;
|
|
}
|
|
if (newState != oldState) {
|
|
frame->SetFrameState(newState);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsLineLayout::ForgetWordFrame(nsIFrame* aFrame)
|
|
{
|
|
if (0 != mWordFrames.GetSize()) {
|
|
NS_ASSERTION((void*)aFrame == mWordFrames.PeekFront(), "forget-word-frame");
|
|
mWordFrames.PopFront();
|
|
}
|
|
}
|
|
|
|
nsIFrame*
|
|
nsLineLayout::FindNextText(nsIPresContext* aPresContext, nsIFrame* aFrame)
|
|
{
|
|
// Grovel through the frame hierarchy to find a text frame that is
|
|
// "adjacent" to aFrame.
|
|
|
|
// So this is kind of funky. During reflow, overflow frames will
|
|
// have their parent pointers set up lazily. We assume that, on
|
|
// entry, aFrame has it's parent pointer set correctly (as do all of
|
|
// its ancestors). Starting from that, we need to make sure that as
|
|
// we traverse through frames trying to find the next text frame, we
|
|
// leave the frames with their parent pointers set correctly, so the
|
|
// *next* time we come through here, we're good to go.
|
|
|
|
// Build a path from the enclosing block frame down to aFrame. We'll
|
|
// use this to walk the frame tree. (XXXwaterson if I was clever, I
|
|
// wouldn't need to build this up before hand, and could incorporate
|
|
// this logic into the walking code directly.)
|
|
nsAutoVoidArray stack;
|
|
for (;;) {
|
|
stack.InsertElementAt(aFrame, 0);
|
|
|
|
aFrame->GetParent(&aFrame);
|
|
|
|
NS_ASSERTION(aFrame != nsnull, "wow, no block frame found");
|
|
if (! aFrame)
|
|
break;
|
|
|
|
const nsStyleDisplay* display;
|
|
aFrame->GetStyleData(eStyleStruct_Display, NS_REINTERPRET_CAST(const nsStyleStruct*&, display));
|
|
if (NS_STYLE_DISPLAY_INLINE != display->mDisplay)
|
|
break;
|
|
}
|
|
|
|
// Using the path we've built up, walk the frame tree looking for
|
|
// the text frame that follows aFrame.
|
|
PRInt32 count;
|
|
while ((count = stack.Count()) != 0) {
|
|
PRInt32 lastIndex = count - 1;
|
|
nsIFrame* top = NS_STATIC_CAST(nsIFrame*, stack.ElementAt(lastIndex));
|
|
|
|
// If this is a frame that'll break a word, then bail.
|
|
PRBool canContinue;
|
|
top->CanContinueTextRun(canContinue);
|
|
if (! canContinue)
|
|
return nsnull;
|
|
|
|
// Advance to top's next sibling
|
|
nsIFrame* next;
|
|
top->GetNextSibling(&next);
|
|
|
|
if (! next) {
|
|
// No more siblings. Pop the top element to walk back up the
|
|
// frame tree.
|
|
stack.RemoveElementAt(lastIndex);
|
|
continue;
|
|
}
|
|
|
|
// We know top's parent is good, but next's might not be. So let's
|
|
// set it to be sure.
|
|
nsIFrame* parent;
|
|
top->GetParent(&parent);
|
|
next->SetParent(parent);
|
|
|
|
// Save next at the top of the stack...
|
|
stack.ReplaceElementAt(next, lastIndex);
|
|
|
|
// ...and prowl down to next's deepest child. We'll need to check
|
|
// for potential run-busters "on the way down", too.
|
|
for (;;) {
|
|
next->CanContinueTextRun(canContinue);
|
|
if (! canContinue)
|
|
return nsnull;
|
|
|
|
nsIFrame* child;
|
|
next->FirstChild(aPresContext, nsnull, &child);
|
|
|
|
if (! child)
|
|
break;
|
|
|
|
stack.AppendElement(child);
|
|
next = child;
|
|
}
|
|
|
|
// Ignore continuing frames
|
|
if (HasPrevInFlow(next))
|
|
continue;
|
|
|
|
// If this is a text frame, return it.
|
|
nsCOMPtr<nsIAtom> frameType;
|
|
next->GetFrameType(getter_AddRefs(frameType));
|
|
if (nsLayoutAtoms::textFrame == frameType.get())
|
|
return next;
|
|
}
|
|
|
|
// If we get here, then there are no more text frames in this block.
|
|
return nsnull;
|
|
}
|
|
|
|
|
|
PRBool
|
|
nsLineLayout::TreatFrameAsBlock(nsIFrame* aFrame)
|
|
{
|
|
const nsStyleDisplay* display;
|
|
aFrame->GetStyleData(eStyleStruct_Display, (const nsStyleStruct*&) display);
|
|
if (NS_STYLE_POSITION_ABSOLUTE == display->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;
|
|
}
|