зеркало из https://github.com/mozilla/pjs.git
954 строки
23 KiB
C++
954 строки
23 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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// vim:cindent:ts=2:et:sw=2:
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla 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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* L. David Baron <dbaron@dbaron.org>
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* Pierre Phaneuf <pp@ludusdesign.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/* representation of one line within a block frame, a CSS line box */
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#include "nsLineBox.h"
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#include "nsLineLayout.h"
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#include "prprf.h"
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#include "nsBlockFrame.h"
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#include "nsGkAtoms.h"
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#include "nsFrameManager.h"
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#ifdef IBMBIDI
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#include "nsBidiPresUtils.h"
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#endif
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#ifdef DEBUG
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static PRInt32 ctorCount;
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PRInt32 nsLineBox::GetCtorCount() { return ctorCount; }
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#endif
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nsLineBox::nsLineBox(nsIFrame* aFrame, PRInt32 aCount, PRBool aIsBlock)
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: mFirstChild(aFrame),
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mBounds(0, 0, 0, 0),
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mAscent(0),
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mData(nsnull)
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{
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MOZ_COUNT_CTOR(nsLineBox);
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#ifdef DEBUG
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++ctorCount;
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NS_ASSERTION(!aIsBlock || aCount == 1, "Blocks must have exactly one child");
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nsIFrame* f = aFrame;
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for (PRInt32 n = aCount; n > 0; f = f->GetNextSibling(), --n) {
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NS_ASSERTION(aIsBlock == f->GetStyleDisplay()->IsBlockOutside(),
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"wrong kind of child frame");
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}
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#endif
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mAllFlags = 0;
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#if NS_STYLE_CLEAR_NONE > 0
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mFlags.mBreakType = NS_STYLE_CLEAR_NONE;
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#endif
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SetChildCount(aCount);
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MarkDirty();
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mFlags.mBlock = aIsBlock;
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}
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nsLineBox::~nsLineBox()
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{
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MOZ_COUNT_DTOR(nsLineBox);
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Cleanup();
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}
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nsLineBox*
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NS_NewLineBox(nsIPresShell* aPresShell, nsIFrame* aFrame,
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PRInt32 aCount, PRBool aIsBlock)
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{
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return new (aPresShell)nsLineBox(aFrame, aCount, aIsBlock);
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}
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// Overloaded new operator. Uses an arena (which comes from the presShell)
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// to perform the allocation.
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void*
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nsLineBox::operator new(size_t sz, nsIPresShell* aPresShell) CPP_THROW_NEW
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{
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return aPresShell->AllocateMisc(sz);
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}
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// Overloaded delete operator. Doesn't actually free the memory, because we
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// use an arena
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void
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nsLineBox::operator delete(void* aPtr, size_t sz)
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{
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}
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void
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nsLineBox::Destroy(nsIPresShell* aPresShell)
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{
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// Destroy the object. This won't actually free the memory, though
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delete this;
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// Have the pres shell recycle the memory
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aPresShell->FreeMisc(sizeof(*this), (void*)this);
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}
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void
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nsLineBox::Cleanup()
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{
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if (mData) {
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if (IsBlock()) {
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delete mBlockData;
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}
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else {
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delete mInlineData;
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}
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mData = nsnull;
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}
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}
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#ifdef DEBUG
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static void
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ListFloats(FILE* out, PRInt32 aIndent, const nsFloatCacheList& aFloats)
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{
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nsFloatCache* fc = aFloats.Head();
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while (fc) {
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nsFrame::IndentBy(out, aIndent);
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nsIFrame* frame = fc->mFloat;
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fprintf(out, "floatframe@%p ", static_cast<void*>(frame));
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if (frame) {
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nsAutoString frameName;
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frame->GetFrameName(frameName);
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fputs(NS_LossyConvertUTF16toASCII(frameName).get(), out);
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}
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else {
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fputs("\n###!!! NULL out-of-flow frame", out);
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}
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fprintf(out, "\n");
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fc = fc->Next();
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}
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}
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#endif
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#ifdef DEBUG
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const char *
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BreakTypeToString(PRUint8 aBreakType)
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{
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switch (aBreakType) {
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case NS_STYLE_CLEAR_NONE: return "nobr";
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case NS_STYLE_CLEAR_LEFT: return "leftbr";
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case NS_STYLE_CLEAR_RIGHT: return "rightbr";
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case NS_STYLE_CLEAR_LEFT_AND_RIGHT: return "leftbr+rightbr";
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case NS_STYLE_CLEAR_LINE: return "linebr";
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case NS_STYLE_CLEAR_BLOCK: return "blockbr";
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case NS_STYLE_CLEAR_COLUMN: return "columnbr";
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case NS_STYLE_CLEAR_PAGE: return "pagebr";
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default:
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break;
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}
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return "unknown";
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}
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char*
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nsLineBox::StateToString(char* aBuf, PRInt32 aBufSize) const
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{
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PR_snprintf(aBuf, aBufSize, "%s,%s,%s,%s,%s,before:%s,after:%s[0x%x]",
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IsBlock() ? "block" : "inline",
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IsDirty() ? "dirty" : "clean",
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IsPreviousMarginDirty() ? "prevmargindirty" : "prevmarginclean",
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IsImpactedByFloat() ? "impacted" : "not impacted",
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IsLineWrapped() ? "wrapped" : "not wrapped",
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BreakTypeToString(GetBreakTypeBefore()),
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BreakTypeToString(GetBreakTypeAfter()),
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mAllFlags);
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return aBuf;
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}
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void
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nsLineBox::List(FILE* out, PRInt32 aIndent) const
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{
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PRInt32 i;
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for (i = aIndent; --i >= 0; ) fputs(" ", out);
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char cbuf[100];
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fprintf(out, "line %p: count=%d state=%s ",
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static_cast<const void*>(this), GetChildCount(),
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StateToString(cbuf, sizeof(cbuf)));
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if (IsBlock() && !GetCarriedOutBottomMargin().IsZero()) {
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fprintf(out, "bm=%d ", GetCarriedOutBottomMargin().get());
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}
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fprintf(out, "{%d,%d,%d,%d} ",
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mBounds.x, mBounds.y, mBounds.width, mBounds.height);
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if (mData) {
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fprintf(out, "vis-overflow={%d,%d,%d,%d} scr-overflow={%d,%d,%d,%d} ",
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mData->mOverflowAreas.VisualOverflow().x,
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mData->mOverflowAreas.VisualOverflow().y,
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mData->mOverflowAreas.VisualOverflow().width,
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mData->mOverflowAreas.VisualOverflow().height,
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mData->mOverflowAreas.ScrollableOverflow().x,
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mData->mOverflowAreas.ScrollableOverflow().y,
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mData->mOverflowAreas.ScrollableOverflow().width,
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mData->mOverflowAreas.ScrollableOverflow().height);
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}
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fprintf(out, "<\n");
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nsIFrame* frame = mFirstChild;
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PRInt32 n = GetChildCount();
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while (--n >= 0) {
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frame->List(out, aIndent + 1);
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frame = frame->GetNextSibling();
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}
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for (i = aIndent; --i >= 0; ) fputs(" ", out);
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if (HasFloats()) {
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fputs("> floats <\n", out);
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ListFloats(out, aIndent + 1, mInlineData->mFloats);
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for (i = aIndent; --i >= 0; ) fputs(" ", out);
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}
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fputs(">\n", out);
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}
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#endif
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nsIFrame*
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nsLineBox::LastChild() const
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{
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nsIFrame* frame = mFirstChild;
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PRInt32 n = GetChildCount() - 1;
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while (--n >= 0) {
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frame = frame->GetNextSibling();
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}
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return frame;
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}
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PRBool
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nsLineBox::IsLastChild(nsIFrame* aFrame) const
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{
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nsIFrame* lastFrame = LastChild();
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return aFrame == lastFrame;
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}
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PRInt32
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nsLineBox::IndexOf(nsIFrame* aFrame) const
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{
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PRInt32 i, n = GetChildCount();
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nsIFrame* frame = mFirstChild;
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for (i = 0; i < n; i++) {
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if (frame == aFrame) {
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return i;
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}
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frame = frame->GetNextSibling();
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}
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return -1;
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}
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PRBool
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nsLineBox::IsEmpty() const
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{
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if (IsBlock())
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return mFirstChild->IsEmpty();
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PRInt32 n;
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nsIFrame *kid;
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for (n = GetChildCount(), kid = mFirstChild;
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n > 0;
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--n, kid = kid->GetNextSibling())
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{
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if (!kid->IsEmpty())
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return PR_FALSE;
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}
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if (HasBullet()) {
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return PR_FALSE;
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}
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return PR_TRUE;
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}
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PRBool
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nsLineBox::CachedIsEmpty()
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{
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if (mFlags.mDirty) {
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return IsEmpty();
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}
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if (mFlags.mEmptyCacheValid) {
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return mFlags.mEmptyCacheState;
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}
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PRBool result;
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if (IsBlock()) {
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result = mFirstChild->CachedIsEmpty();
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} else {
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PRInt32 n;
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nsIFrame *kid;
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result = PR_TRUE;
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for (n = GetChildCount(), kid = mFirstChild;
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n > 0;
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--n, kid = kid->GetNextSibling())
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{
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if (!kid->CachedIsEmpty()) {
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result = PR_FALSE;
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break;
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}
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}
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if (HasBullet()) {
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result = PR_FALSE;
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}
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}
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mFlags.mEmptyCacheValid = PR_TRUE;
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mFlags.mEmptyCacheState = result;
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return result;
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}
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void
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nsLineBox::DeleteLineList(nsPresContext* aPresContext, nsLineList& aLines,
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nsIFrame* aDestructRoot)
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{
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if (! aLines.empty()) {
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// Delete our child frames before doing anything else. In particular
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// we do all of this before our base class releases it's hold on the
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// view.
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#ifdef DEBUG
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PRInt32 numFrames = 0;
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#endif
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for (nsIFrame* child = aLines.front()->mFirstChild; child; ) {
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nsIFrame* nextChild = child->GetNextSibling();
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child->SetNextSibling(nsnull);
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child->DestroyFrom((aDestructRoot) ? aDestructRoot : child);
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child = nextChild;
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#ifdef DEBUG
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numFrames++;
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#endif
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}
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nsIPresShell *shell = aPresContext->PresShell();
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do {
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nsLineBox* line = aLines.front();
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#ifdef DEBUG
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numFrames -= line->GetChildCount();
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#endif
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aLines.pop_front();
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line->Destroy(shell);
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} while (! aLines.empty());
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#ifdef DEBUG
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NS_ASSERTION(numFrames == 0, "number of frames deleted does not match");
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#endif
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}
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}
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PRBool
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nsLineBox::RFindLineContaining(nsIFrame* aFrame,
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const nsLineList::iterator& aBegin,
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nsLineList::iterator& aEnd,
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nsIFrame* aLastFrameBeforeEnd,
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PRInt32* aFrameIndexInLine)
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{
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NS_PRECONDITION(aFrame, "null ptr");
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nsIFrame* curFrame = aLastFrameBeforeEnd;
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while (aBegin != aEnd) {
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--aEnd;
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NS_ASSERTION(aEnd->IsLastChild(curFrame), "Unexpected curFrame");
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// i is the index of curFrame in aEnd
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PRInt32 i = aEnd->GetChildCount() - 1;
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while (i >= 0) {
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if (curFrame == aFrame) {
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*aFrameIndexInLine = i;
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return PR_TRUE;
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}
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--i;
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curFrame = curFrame->GetPrevSibling();
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}
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}
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*aFrameIndexInLine = -1;
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return PR_FALSE;
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}
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nsCollapsingMargin
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nsLineBox::GetCarriedOutBottomMargin() const
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{
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NS_ASSERTION(IsBlock(),
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"GetCarriedOutBottomMargin called on non-block line.");
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return (IsBlock() && mBlockData)
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? mBlockData->mCarriedOutBottomMargin
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: nsCollapsingMargin();
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}
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PRBool
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nsLineBox::SetCarriedOutBottomMargin(nsCollapsingMargin aValue)
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{
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PRBool changed = PR_FALSE;
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if (IsBlock()) {
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if (!aValue.IsZero()) {
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if (!mBlockData) {
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mBlockData = new ExtraBlockData(mBounds);
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}
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if (mBlockData) {
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changed = aValue != mBlockData->mCarriedOutBottomMargin;
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mBlockData->mCarriedOutBottomMargin = aValue;
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}
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}
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else if (mBlockData) {
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changed = aValue != mBlockData->mCarriedOutBottomMargin;
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mBlockData->mCarriedOutBottomMargin = aValue;
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MaybeFreeData();
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}
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}
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return changed;
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}
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void
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nsLineBox::MaybeFreeData()
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{
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if (mData && mData->mOverflowAreas == nsOverflowAreas(mBounds, mBounds)) {
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if (IsInline()) {
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if (mInlineData->mFloats.IsEmpty()) {
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delete mInlineData;
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mInlineData = nsnull;
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}
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}
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else if (mBlockData->mCarriedOutBottomMargin.IsZero()) {
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delete mBlockData;
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mBlockData = nsnull;
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}
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}
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}
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// XXX get rid of this???
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nsFloatCache*
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nsLineBox::GetFirstFloat()
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{
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NS_ABORT_IF_FALSE(IsInline(), "block line can't have floats");
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return mInlineData ? mInlineData->mFloats.Head() : nsnull;
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}
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// XXX this might be too eager to free memory
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void
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nsLineBox::FreeFloats(nsFloatCacheFreeList& aFreeList)
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{
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NS_ABORT_IF_FALSE(IsInline(), "block line can't have floats");
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if (IsInline() && mInlineData) {
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if (mInlineData->mFloats.NotEmpty()) {
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aFreeList.Append(mInlineData->mFloats);
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}
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MaybeFreeData();
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}
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}
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void
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nsLineBox::AppendFloats(nsFloatCacheFreeList& aFreeList)
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{
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NS_ABORT_IF_FALSE(IsInline(), "block line can't have floats");
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if (IsInline()) {
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if (aFreeList.NotEmpty()) {
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if (!mInlineData) {
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mInlineData = new ExtraInlineData(mBounds);
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}
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if (mInlineData) {
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mInlineData->mFloats.Append(aFreeList);
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}
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}
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}
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}
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PRBool
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nsLineBox::RemoveFloat(nsIFrame* aFrame)
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{
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NS_ABORT_IF_FALSE(IsInline(), "block line can't have floats");
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if (IsInline() && mInlineData) {
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nsFloatCache* fc = mInlineData->mFloats.Find(aFrame);
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if (fc) {
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// Note: the placeholder is part of the line's child list
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// and will be removed later.
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mInlineData->mFloats.Remove(fc);
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delete fc;
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MaybeFreeData();
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return PR_TRUE;
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}
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}
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return PR_FALSE;
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}
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void
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nsLineBox::SetOverflowAreas(const nsOverflowAreas& aOverflowAreas)
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{
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NS_FOR_FRAME_OVERFLOW_TYPES(otype) {
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NS_ASSERTION(aOverflowAreas.Overflow(otype).width >= 0,
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"illegal width for combined area");
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NS_ASSERTION(aOverflowAreas.Overflow(otype).height >= 0,
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"illegal height for combined area");
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}
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if (!aOverflowAreas.VisualOverflow().IsEqualInterior(mBounds) ||
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!aOverflowAreas.ScrollableOverflow().IsEqualEdges(mBounds)) {
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if (!mData) {
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if (IsInline()) {
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mInlineData = new ExtraInlineData(mBounds);
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}
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else {
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mBlockData = new ExtraBlockData(mBounds);
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}
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}
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mData->mOverflowAreas = aOverflowAreas;
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}
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else if (mData) {
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// Store away new value so that MaybeFreeData compares against
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// the right value.
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mData->mOverflowAreas = aOverflowAreas;
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MaybeFreeData();
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}
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}
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//----------------------------------------------------------------------
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|
|
static nsLineBox* gDummyLines[1];
|
|
|
|
nsLineIterator::nsLineIterator()
|
|
{
|
|
mLines = gDummyLines;
|
|
mNumLines = 0;
|
|
mIndex = 0;
|
|
mRightToLeft = PR_FALSE;
|
|
}
|
|
|
|
nsLineIterator::~nsLineIterator()
|
|
{
|
|
if (mLines != gDummyLines) {
|
|
delete [] mLines;
|
|
}
|
|
}
|
|
|
|
/* virtual */ void
|
|
nsLineIterator::DisposeLineIterator()
|
|
{
|
|
delete this;
|
|
}
|
|
|
|
nsresult
|
|
nsLineIterator::Init(nsLineList& aLines, PRBool aRightToLeft)
|
|
{
|
|
mRightToLeft = aRightToLeft;
|
|
|
|
// Count the lines
|
|
PRInt32 numLines = aLines.size();
|
|
if (0 == numLines) {
|
|
// Use gDummyLines so that we don't need null pointer checks in
|
|
// the accessor methods
|
|
mLines = gDummyLines;
|
|
return NS_OK;
|
|
}
|
|
|
|
// Make a linear array of the lines
|
|
mLines = new nsLineBox*[numLines];
|
|
if (!mLines) {
|
|
// Use gDummyLines so that we don't need null pointer checks in
|
|
// the accessor methods
|
|
mLines = gDummyLines;
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
nsLineBox** lp = mLines;
|
|
for (nsLineList::iterator line = aLines.begin(), line_end = aLines.end() ;
|
|
line != line_end;
|
|
++line)
|
|
{
|
|
*lp++ = line;
|
|
}
|
|
mNumLines = numLines;
|
|
return NS_OK;
|
|
}
|
|
|
|
PRInt32
|
|
nsLineIterator::GetNumLines()
|
|
{
|
|
return mNumLines;
|
|
}
|
|
|
|
PRBool
|
|
nsLineIterator::GetDirection()
|
|
{
|
|
return mRightToLeft;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsLineIterator::GetLine(PRInt32 aLineNumber,
|
|
nsIFrame** aFirstFrameOnLine,
|
|
PRInt32* aNumFramesOnLine,
|
|
nsRect& aLineBounds,
|
|
PRUint32* aLineFlags)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aFirstFrameOnLine);
|
|
NS_ENSURE_ARG_POINTER(aNumFramesOnLine);
|
|
NS_ENSURE_ARG_POINTER(aLineFlags);
|
|
|
|
if ((aLineNumber < 0) || (aLineNumber >= mNumLines)) {
|
|
*aFirstFrameOnLine = nsnull;
|
|
*aNumFramesOnLine = 0;
|
|
aLineBounds.SetRect(0, 0, 0, 0);
|
|
return NS_OK;
|
|
}
|
|
nsLineBox* line = mLines[aLineNumber];
|
|
*aFirstFrameOnLine = line->mFirstChild;
|
|
*aNumFramesOnLine = line->GetChildCount();
|
|
aLineBounds = line->mBounds;
|
|
|
|
PRUint32 flags = 0;
|
|
if (line->IsBlock()) {
|
|
flags |= NS_LINE_FLAG_IS_BLOCK;
|
|
}
|
|
else {
|
|
if (line->HasBreakAfter())
|
|
flags |= NS_LINE_FLAG_ENDS_IN_BREAK;
|
|
}
|
|
*aLineFlags = flags;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
PRInt32
|
|
nsLineIterator::FindLineContaining(nsIFrame* aFrame)
|
|
{
|
|
nsLineBox* line = mLines[0];
|
|
PRInt32 lineNumber = 0;
|
|
while (lineNumber != mNumLines) {
|
|
if (line->Contains(aFrame)) {
|
|
return lineNumber;
|
|
}
|
|
line = mLines[++lineNumber];
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
#ifdef IBMBIDI
|
|
NS_IMETHODIMP
|
|
nsLineIterator::CheckLineOrder(PRInt32 aLine,
|
|
PRBool *aIsReordered,
|
|
nsIFrame **aFirstVisual,
|
|
nsIFrame **aLastVisual)
|
|
{
|
|
NS_ASSERTION (aLine >= 0 && aLine < mNumLines, "aLine out of range!");
|
|
nsLineBox* line = mLines[aLine];
|
|
|
|
if (!line->mFirstChild) { // empty line
|
|
*aIsReordered = PR_FALSE;
|
|
*aFirstVisual = nsnull;
|
|
*aLastVisual = nsnull;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsBidiPresUtils* bidiUtils = line->mFirstChild->PresContext()->GetBidiUtils();
|
|
|
|
nsIFrame* leftmostFrame;
|
|
nsIFrame* rightmostFrame;
|
|
*aIsReordered = bidiUtils->CheckLineOrder(line->mFirstChild, line->GetChildCount(), &leftmostFrame, &rightmostFrame);
|
|
|
|
// map leftmost/rightmost to first/last according to paragraph direction
|
|
*aFirstVisual = mRightToLeft ? rightmostFrame : leftmostFrame;
|
|
*aLastVisual = mRightToLeft ? leftmostFrame : rightmostFrame;
|
|
|
|
return NS_OK;
|
|
}
|
|
#endif // IBMBIDI
|
|
|
|
NS_IMETHODIMP
|
|
nsLineIterator::FindFrameAt(PRInt32 aLineNumber,
|
|
nscoord aX,
|
|
nsIFrame** aFrameFound,
|
|
PRBool* aXIsBeforeFirstFrame,
|
|
PRBool* aXIsAfterLastFrame)
|
|
{
|
|
NS_PRECONDITION(aFrameFound && aXIsBeforeFirstFrame && aXIsAfterLastFrame,
|
|
"null OUT ptr");
|
|
if (!aFrameFound || !aXIsBeforeFirstFrame || !aXIsAfterLastFrame) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
if ((aLineNumber < 0) || (aLineNumber >= mNumLines)) {
|
|
return NS_ERROR_INVALID_ARG;
|
|
}
|
|
|
|
nsLineBox* line = mLines[aLineNumber];
|
|
if (!line) {
|
|
*aFrameFound = nsnull;
|
|
*aXIsBeforeFirstFrame = PR_TRUE;
|
|
*aXIsAfterLastFrame = PR_FALSE;
|
|
return NS_OK;
|
|
}
|
|
|
|
if (line->mBounds.width == 0 && line->mBounds.height == 0)
|
|
return NS_ERROR_FAILURE;
|
|
|
|
nsIFrame* frame = line->mFirstChild;
|
|
nsIFrame* closestFromLeft = nsnull;
|
|
nsIFrame* closestFromRight = nsnull;
|
|
PRInt32 n = line->GetChildCount();
|
|
while (n--) {
|
|
nsRect rect = frame->GetRect();
|
|
if (rect.width > 0) {
|
|
// If aX is inside this frame - this is it
|
|
if (rect.x <= aX && rect.XMost() > aX) {
|
|
closestFromLeft = closestFromRight = frame;
|
|
break;
|
|
}
|
|
if (rect.x < aX) {
|
|
if (!closestFromLeft ||
|
|
rect.XMost() > closestFromLeft->GetRect().XMost())
|
|
closestFromLeft = frame;
|
|
}
|
|
else {
|
|
if (!closestFromRight ||
|
|
rect.x < closestFromRight->GetRect().x)
|
|
closestFromRight = frame;
|
|
}
|
|
}
|
|
frame = frame->GetNextSibling();
|
|
}
|
|
if (!closestFromLeft && !closestFromRight) {
|
|
// All frames were zero-width. Just take the first one.
|
|
closestFromLeft = closestFromRight = line->mFirstChild;
|
|
}
|
|
*aXIsBeforeFirstFrame = mRightToLeft ? !closestFromRight : !closestFromLeft;
|
|
*aXIsAfterLastFrame = mRightToLeft ? !closestFromLeft : !closestFromRight;
|
|
if (closestFromLeft == closestFromRight) {
|
|
*aFrameFound = closestFromLeft;
|
|
}
|
|
else if (!closestFromLeft) {
|
|
*aFrameFound = closestFromRight;
|
|
}
|
|
else if (!closestFromRight) {
|
|
*aFrameFound = closestFromLeft;
|
|
}
|
|
else { // we're between two frames
|
|
nscoord delta = closestFromRight->GetRect().x - closestFromLeft->GetRect().XMost();
|
|
if (aX < closestFromLeft->GetRect().XMost() + delta/2)
|
|
*aFrameFound = closestFromLeft;
|
|
else
|
|
*aFrameFound = closestFromRight;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsLineIterator::GetNextSiblingOnLine(nsIFrame*& aFrame, PRInt32 aLineNumber)
|
|
{
|
|
aFrame = aFrame->GetNextSibling();
|
|
return NS_OK;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
#ifdef NS_BUILD_REFCNT_LOGGING
|
|
nsFloatCacheList::nsFloatCacheList() :
|
|
mHead(nsnull)
|
|
{
|
|
MOZ_COUNT_CTOR(nsFloatCacheList);
|
|
}
|
|
#endif
|
|
|
|
nsFloatCacheList::~nsFloatCacheList()
|
|
{
|
|
DeleteAll();
|
|
MOZ_COUNT_DTOR(nsFloatCacheList);
|
|
}
|
|
|
|
void
|
|
nsFloatCacheList::DeleteAll()
|
|
{
|
|
nsFloatCache* c = mHead;
|
|
while (c) {
|
|
nsFloatCache* next = c->Next();
|
|
delete c;
|
|
c = next;
|
|
}
|
|
mHead = nsnull;
|
|
}
|
|
|
|
nsFloatCache*
|
|
nsFloatCacheList::Tail() const
|
|
{
|
|
nsFloatCache* fc = mHead;
|
|
while (fc) {
|
|
if (!fc->mNext) {
|
|
break;
|
|
}
|
|
fc = fc->mNext;
|
|
}
|
|
return fc;
|
|
}
|
|
|
|
void
|
|
nsFloatCacheList::Append(nsFloatCacheFreeList& aList)
|
|
{
|
|
NS_PRECONDITION(aList.NotEmpty(), "Appending empty list will fail");
|
|
|
|
nsFloatCache* tail = Tail();
|
|
if (tail) {
|
|
NS_ASSERTION(!tail->mNext, "Bogus!");
|
|
tail->mNext = aList.mHead;
|
|
}
|
|
else {
|
|
NS_ASSERTION(!mHead, "Bogus!");
|
|
mHead = aList.mHead;
|
|
}
|
|
aList.mHead = nsnull;
|
|
aList.mTail = nsnull;
|
|
}
|
|
|
|
nsFloatCache*
|
|
nsFloatCacheList::Find(nsIFrame* aOutOfFlowFrame)
|
|
{
|
|
nsFloatCache* fc = mHead;
|
|
while (fc) {
|
|
if (fc->mFloat == aOutOfFlowFrame) {
|
|
break;
|
|
}
|
|
fc = fc->Next();
|
|
}
|
|
return fc;
|
|
}
|
|
|
|
nsFloatCache*
|
|
nsFloatCacheList::RemoveAndReturnPrev(nsFloatCache* aElement)
|
|
{
|
|
nsFloatCache* fc = mHead;
|
|
nsFloatCache* prev = nsnull;
|
|
while (fc) {
|
|
if (fc == aElement) {
|
|
if (prev) {
|
|
prev->mNext = fc->mNext;
|
|
} else {
|
|
mHead = fc->mNext;
|
|
}
|
|
return prev;
|
|
}
|
|
prev = fc;
|
|
fc = fc->mNext;
|
|
}
|
|
return nsnull;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
#ifdef NS_BUILD_REFCNT_LOGGING
|
|
nsFloatCacheFreeList::nsFloatCacheFreeList() :
|
|
mTail(nsnull)
|
|
{
|
|
MOZ_COUNT_CTOR(nsFloatCacheFreeList);
|
|
}
|
|
|
|
nsFloatCacheFreeList::~nsFloatCacheFreeList()
|
|
{
|
|
MOZ_COUNT_DTOR(nsFloatCacheFreeList);
|
|
}
|
|
#endif
|
|
|
|
void
|
|
nsFloatCacheFreeList::Append(nsFloatCacheList& aList)
|
|
{
|
|
NS_PRECONDITION(aList.NotEmpty(), "Appending empty list will fail");
|
|
|
|
if (mTail) {
|
|
NS_ASSERTION(!mTail->mNext, "Bogus");
|
|
mTail->mNext = aList.mHead;
|
|
}
|
|
else {
|
|
NS_ASSERTION(!mHead, "Bogus");
|
|
mHead = aList.mHead;
|
|
}
|
|
mTail = aList.Tail();
|
|
aList.mHead = nsnull;
|
|
}
|
|
|
|
void
|
|
nsFloatCacheFreeList::Remove(nsFloatCache* aElement)
|
|
{
|
|
nsFloatCache* prev = nsFloatCacheList::RemoveAndReturnPrev(aElement);
|
|
if (mTail == aElement) {
|
|
mTail = prev;
|
|
}
|
|
}
|
|
|
|
void
|
|
nsFloatCacheFreeList::DeleteAll()
|
|
{
|
|
nsFloatCacheList::DeleteAll();
|
|
mTail = nsnull;
|
|
}
|
|
|
|
nsFloatCache*
|
|
nsFloatCacheFreeList::Alloc(nsIFrame* aFloat)
|
|
{
|
|
NS_PRECONDITION(aFloat->GetStateBits() & NS_FRAME_OUT_OF_FLOW,
|
|
"This is a float cache, why isn't the frame out-of-flow?");
|
|
nsFloatCache* fc = mHead;
|
|
if (mHead) {
|
|
if (mHead == mTail) {
|
|
mHead = mTail = nsnull;
|
|
}
|
|
else {
|
|
mHead = fc->mNext;
|
|
}
|
|
fc->mNext = nsnull;
|
|
}
|
|
else {
|
|
fc = new nsFloatCache();
|
|
}
|
|
fc->mFloat = aFloat;
|
|
return fc;
|
|
}
|
|
|
|
void
|
|
nsFloatCacheFreeList::Append(nsFloatCache* aFloat)
|
|
{
|
|
NS_ASSERTION(!aFloat->mNext, "Bogus!");
|
|
aFloat->mNext = nsnull;
|
|
if (mTail) {
|
|
NS_ASSERTION(!mTail->mNext, "Bogus!");
|
|
mTail->mNext = aFloat;
|
|
mTail = aFloat;
|
|
}
|
|
else {
|
|
NS_ASSERTION(!mHead, "Bogus!");
|
|
mHead = mTail = aFloat;
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
nsFloatCache::nsFloatCache()
|
|
: mFloat(nsnull),
|
|
mNext(nsnull)
|
|
{
|
|
MOZ_COUNT_CTOR(nsFloatCache);
|
|
}
|
|
|
|
#ifdef NS_BUILD_REFCNT_LOGGING
|
|
nsFloatCache::~nsFloatCache()
|
|
{
|
|
MOZ_COUNT_DTOR(nsFloatCache);
|
|
}
|
|
#endif
|