зеркало из https://github.com/mozilla/pjs.git
1846 строки
63 KiB
C++
1846 строки
63 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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*
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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.org 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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*
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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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*
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* This Original Code has been modified by IBM Corporation. Modifications made by IBM
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* described herein are Copyright (c) International Business Machines Corporation, 2000.
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* Modifications to Mozilla code or documentation identified per MPL Section 3.3
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*
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* Date Modified by Description of modification
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* 04/20/2000 IBM Corp. OS/2 VisualAge build.
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*/
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/* storage of the frame tree and information about it */
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#include "nscore.h"
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#include "nsPresContext.h"
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#include "nsIPresShell.h"
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#include "nsStyleSet.h"
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#include "nsCSSFrameConstructor.h"
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#include "nsStyleContext.h"
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#include "nsStyleChangeList.h"
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#include "nsIServiceManager.h"
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#include "nsCOMPtr.h"
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#include "prthread.h"
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#include "plhash.h"
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#include "nsPlaceholderFrame.h"
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#include "nsContainerFrame.h"
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#include "nsBlockFrame.h"
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#include "nsGkAtoms.h"
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#include "nsCSSAnonBoxes.h"
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#include "nsCSSPseudoElements.h"
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#ifdef NS_DEBUG
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#include "nsISupportsArray.h"
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#include "nsIStyleRule.h"
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#endif
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#include "nsILayoutHistoryState.h"
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#include "nsPresState.h"
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#include "nsIContent.h"
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#include "nsINameSpaceManager.h"
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#include "nsIDocument.h"
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#include "nsIScrollableFrame.h"
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#include "nsIHTMLDocument.h"
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#include "nsIDOMHTMLDocument.h"
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#include "nsIDOMNodeList.h"
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#include "nsIDOMHTMLCollection.h"
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#include "nsIFormControl.h"
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#include "nsIDOMElement.h"
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#include "nsIDOMHTMLFormElement.h"
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#include "nsIForm.h"
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#include "nsContentUtils.h"
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#include "nsReadableUtils.h"
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#include "nsUnicharUtils.h"
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#include "nsPrintfCString.h"
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#include "nsLayoutErrors.h"
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#include "nsLayoutUtils.h"
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#include "nsAutoPtr.h"
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#include "imgIRequest.h"
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#include "nsStyleStructInlines.h"
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#include "nsFrameManager.h"
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#ifdef ACCESSIBILITY
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#include "nsIAccessibilityService.h"
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#include "nsIAccessibleEvent.h"
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#endif
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#ifdef DEBUG
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//#define NOISY_DEBUG
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//#define DEBUG_UNDISPLAYED_MAP
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#else
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#undef NOISY_DEBUG
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#undef DEBUG_UNDISPLAYED_MAP
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#endif
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#ifdef NOISY_DEBUG
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#define NOISY_TRACE(_msg) \
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printf("%s",_msg);
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#define NOISY_TRACE_FRAME(_msg,_frame) \
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printf("%s ",_msg); nsFrame::ListTag(stdout,_frame); printf("\n");
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#else
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#define NOISY_TRACE(_msg);
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#define NOISY_TRACE_FRAME(_msg,_frame);
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#endif
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// IID's
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//----------------------------------------------------------------------
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struct PlaceholderMapEntry : public PLDHashEntryHdr {
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// key (the out of flow frame) can be obtained through placeholder frame
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nsPlaceholderFrame *placeholderFrame;
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};
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PR_STATIC_CALLBACK(PRBool)
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PlaceholderMapMatchEntry(PLDHashTable *table, const PLDHashEntryHdr *hdr,
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const void *key)
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{
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const PlaceholderMapEntry *entry =
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static_cast<const PlaceholderMapEntry*>(hdr);
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NS_ASSERTION(entry->placeholderFrame->GetOutOfFlowFrame() !=
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(void*)0xdddddddd,
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"Dead placeholder in placeholder map");
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return entry->placeholderFrame->GetOutOfFlowFrame() == key;
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}
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static PLDHashTableOps PlaceholderMapOps = {
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PL_DHashAllocTable,
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PL_DHashFreeTable,
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PL_DHashVoidPtrKeyStub,
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PlaceholderMapMatchEntry,
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PL_DHashMoveEntryStub,
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PL_DHashClearEntryStub,
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PL_DHashFinalizeStub,
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NULL
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};
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//----------------------------------------------------------------------
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struct PrimaryFrameMapEntry : public PLDHashEntryHdr {
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// key (the content node) can almost always be obtained through the
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// frame. If it weren't for the way image maps (mis)used the primary
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// frame map, we'd be able to have a 2 word entry instead of a 3 word
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// entry.
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nsIContent *content;
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nsIFrame *frame;
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};
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// These ops should be used if/when we switch back to a 2-word entry.
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// See comment in |PrimaryFrameMapEntry| above.
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#if 0
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PR_STATIC_CALLBACK(PRBool)
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PrimaryFrameMapMatchEntry(PLDHashTable *table, const PLDHashEntryHdr *hdr,
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const void *key)
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{
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const PrimaryFrameMapEntry *entry =
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static_cast<const PrimaryFrameMapEntry*>(hdr);
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return entry->frame->GetContent() == key;
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}
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static PLDHashTableOps PrimaryFrameMapOps = {
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PL_DHashAllocTable,
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PL_DHashFreeTable,
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PL_DHashVoidPtrKeyStub,
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PrimaryFrameMapMatchEntry,
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PL_DHashMoveEntryStub,
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PL_DHashClearEntryStub,
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PL_DHashFinalizeStub,
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NULL
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};
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#endif /* 0 */
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//----------------------------------------------------------------------
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// XXXldb This seems too complicated for what I think it's doing, and it
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// should also be using pldhash rather than plhash to use less memory.
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class UndisplayedNode {
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public:
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UndisplayedNode(nsIContent* aContent, nsStyleContext* aStyle)
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: mContent(aContent),
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mStyle(aStyle),
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mNext(nsnull)
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{
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MOZ_COUNT_CTOR(UndisplayedNode);
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}
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NS_HIDDEN ~UndisplayedNode()
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{
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MOZ_COUNT_DTOR(UndisplayedNode);
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delete mNext;
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}
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nsCOMPtr<nsIContent> mContent;
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nsRefPtr<nsStyleContext> mStyle;
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UndisplayedNode* mNext;
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};
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class nsFrameManagerBase::UndisplayedMap {
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public:
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UndisplayedMap(PRUint32 aNumBuckets = 16) NS_HIDDEN;
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~UndisplayedMap(void) NS_HIDDEN;
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NS_HIDDEN_(UndisplayedNode*) GetFirstNode(nsIContent* aParentContent);
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NS_HIDDEN_(nsresult) AddNodeFor(nsIContent* aParentContent,
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nsIContent* aChild, nsStyleContext* aStyle);
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NS_HIDDEN_(void) RemoveNodeFor(nsIContent* aParentContent,
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UndisplayedNode* aNode);
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NS_HIDDEN_(void) RemoveNodesFor(nsIContent* aParentContent);
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// Removes all entries from the hash table
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NS_HIDDEN_(void) Clear(void);
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protected:
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NS_HIDDEN_(PLHashEntry**) GetEntryFor(nsIContent* aParentContent);
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NS_HIDDEN_(void) AppendNodeFor(UndisplayedNode* aNode,
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nsIContent* aParentContent);
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PLHashTable* mTable;
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PLHashEntry** mLastLookup;
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};
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//----------------------------------------------------------------------
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nsFrameManager::nsFrameManager()
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{
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}
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nsFrameManager::~nsFrameManager()
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{
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NS_ASSERTION(!mPresShell, "nsFrameManager::Destroy never called");
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}
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nsresult
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nsFrameManager::Init(nsIPresShell* aPresShell,
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nsStyleSet* aStyleSet)
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{
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if (!aPresShell) {
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NS_ERROR("null pres shell");
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return NS_ERROR_FAILURE;
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}
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if (!aStyleSet) {
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NS_ERROR("null style set");
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return NS_ERROR_FAILURE;
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}
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mPresShell = aPresShell;
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mStyleSet = aStyleSet;
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return NS_OK;
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}
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void
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nsFrameManager::Destroy()
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{
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NS_ASSERTION(mPresShell, "Frame manager already shut down.");
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// Destroy the frame hierarchy.
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mPresShell->SetIgnoreFrameDestruction(PR_TRUE);
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mIsDestroyingFrames = PR_TRUE; // This flag prevents GetPrimaryFrameFor from returning pointers to destroyed frames
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// Unregister all placeholders before tearing down the frame tree
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nsFrameManager::ClearPlaceholderFrameMap();
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if (mRootFrame) {
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mRootFrame->Destroy();
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mRootFrame = nsnull;
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}
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nsFrameManager::ClearPrimaryFrameMap();
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delete mUndisplayedMap;
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mUndisplayedMap = nsnull;
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mPresShell = nsnull;
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}
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nsIFrame*
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nsFrameManager::GetCanvasFrame()
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{
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if (mRootFrame) {
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// walk the children of the root frame looking for a frame with type==canvas
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// start at the root
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nsIFrame* childFrame = mRootFrame;
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while (childFrame) {
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// get each sibling of the child and check them, startig at the child
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nsIFrame *siblingFrame = childFrame;
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while (siblingFrame) {
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if (siblingFrame->GetType() == nsGkAtoms::canvasFrame) {
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// this is it
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return siblingFrame;
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} else {
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siblingFrame = siblingFrame->GetNextSibling();
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}
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}
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// move on to the child's child
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childFrame = childFrame->GetFirstChild(nsnull);
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}
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}
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return nsnull;
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}
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//----------------------------------------------------------------------
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// Primary frame functions
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nsIFrame*
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nsFrameManager::GetPrimaryFrameFor(nsIContent* aContent,
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PRInt32 aIndexHint)
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{
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NS_ENSURE_TRUE(aContent, nsnull);
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if (mIsDestroyingFrames) {
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#ifdef DEBUG
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printf("GetPrimaryFrameFor() called while nsFrameManager is being destroyed!\n");
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#endif
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return nsnull;
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}
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if (!aContent->MayHaveFrame()) {
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return nsnull;
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}
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if (mPrimaryFrameMap.ops) {
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PrimaryFrameMapEntry *entry = static_cast<PrimaryFrameMapEntry*>
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(PL_DHashTableOperate(&mPrimaryFrameMap, aContent, PL_DHASH_LOOKUP));
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if (PL_DHASH_ENTRY_IS_BUSY(entry)) {
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return entry->frame;
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}
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// XXX: todo: Add a lookup into the undisplay map to skip searches
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// if we already know the content has no frame.
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// nsCSSFrameConstructor calls SetUndisplayedContent() for every
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// content node that has display: none.
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// Today, the undisplay map doesn't quite support what we need.
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// We need to see if we can add a method to make a search for aContent
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// very fast in the embedded hash table.
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// This would almost completely remove the lookup penalty for things
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// like <SCRIPT> and comments in very large documents.
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// XXX with the nsIContent::MayHaveFrame bit, is that really necessary now?
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// Give the frame construction code the opportunity to return the
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// frame that maps the content object
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// if the prev sibling of aContent has a cached primary frame,
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// pass that data in to the style set to speed things up
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// if any methods in here fail, don't report that failure
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// we're just trying to enhance performance here, not test for correctness
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nsFindFrameHint hint;
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nsIContent* parent = aContent->GetParent();
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if (parent)
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{
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PRInt32 index = aIndexHint >= 0 ? aIndexHint : parent->IndexOf(aContent);
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if (index > 0) // no use looking if it's the first child
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{
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nsIContent *prevSibling;
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do {
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prevSibling = parent->GetChildAt(--index);
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} while (index &&
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(prevSibling->IsNodeOfType(nsINode::eTEXT) ||
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prevSibling->IsNodeOfType(nsINode::eCOMMENT) ||
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prevSibling->IsNodeOfType(nsINode::ePROCESSING_INSTRUCTION)));
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if (prevSibling) {
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entry = static_cast<PrimaryFrameMapEntry*>
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(PL_DHashTableOperate(&mPrimaryFrameMap, prevSibling,
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PL_DHASH_LOOKUP));
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if (PL_DHASH_ENTRY_IS_BUSY(entry))
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hint.mPrimaryFrameForPrevSibling = entry->frame;
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}
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}
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}
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// walk the frame tree to find the frame that maps aContent.
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// Use the hint if we have it.
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nsIFrame *result;
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mPresShell->FrameConstructor()->
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FindPrimaryFrameFor(this, aContent, &result,
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hint.mPrimaryFrameForPrevSibling ? &hint : nsnull);
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return result;
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}
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return nsnull;
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}
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nsresult
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nsFrameManager::SetPrimaryFrameFor(nsIContent* aContent,
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nsIFrame* aPrimaryFrame)
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{
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NS_ENSURE_ARG_POINTER(aContent);
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NS_ASSERTION(aPrimaryFrame && aPrimaryFrame->GetParent(),
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"BOGUS!");
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// This code should be used if/when we switch back to a 2-word entry
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// in the primary frame map.
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#if 0
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NS_PRECONDITION(aPrimaryFrame->GetContent() == aContent, "wrong content");
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#endif
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// Create a new hashtable if necessary
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if (!mPrimaryFrameMap.ops) {
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if (!PL_DHashTableInit(&mPrimaryFrameMap, PL_DHashGetStubOps(), nsnull,
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sizeof(PrimaryFrameMapEntry), 16)) {
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mPrimaryFrameMap.ops = nsnull;
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return NS_ERROR_OUT_OF_MEMORY;
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}
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}
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// Add a mapping to the hash table
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PrimaryFrameMapEntry *entry = static_cast<PrimaryFrameMapEntry*>
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(PL_DHashTableOperate(&mPrimaryFrameMap, aContent, PL_DHASH_ADD));
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#ifdef DEBUG_dbaron
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if (entry->frame) {
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NS_WARNING("already have primary frame for content");
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}
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#endif
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entry->frame = aPrimaryFrame;
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entry->content = aContent;
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return NS_OK;
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}
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void
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nsFrameManager::RemoveAsPrimaryFrame(nsIContent* aContent,
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nsIFrame* aPrimaryFrame)
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{
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NS_PRECONDITION(aPrimaryFrame, "Must have a frame");
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if (aContent && mPrimaryFrameMap.ops) {
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PrimaryFrameMapEntry *entry = static_cast<PrimaryFrameMapEntry*>
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(PL_DHashTableOperate(&mPrimaryFrameMap, aContent, PL_DHASH_LOOKUP));
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if (PL_DHASH_ENTRY_IS_BUSY(entry) && entry->frame == aPrimaryFrame) {
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// Don't use PL_DHashTableRawRemove, since we want the table to
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// shrink as needed.
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PL_DHashTableOperate(&mPrimaryFrameMap, aContent, PL_DHASH_REMOVE);
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}
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}
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aPrimaryFrame->RemovedAsPrimaryFrame();
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}
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void
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nsFrameManager::ClearPrimaryFrameMap()
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{
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if (mPrimaryFrameMap.ops) {
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PL_DHashTableFinish(&mPrimaryFrameMap);
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mPrimaryFrameMap.ops = nsnull;
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}
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}
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// Placeholder frame functions
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nsPlaceholderFrame*
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nsFrameManager::GetPlaceholderFrameFor(nsIFrame* aFrame)
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{
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NS_PRECONDITION(aFrame, "null param unexpected");
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if (mPlaceholderMap.ops) {
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PlaceholderMapEntry *entry = static_cast<PlaceholderMapEntry*>
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(PL_DHashTableOperate(const_cast<PLDHashTable*>(&mPlaceholderMap),
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aFrame, PL_DHASH_LOOKUP));
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if (PL_DHASH_ENTRY_IS_BUSY(entry)) {
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return entry->placeholderFrame;
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}
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}
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return nsnull;
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}
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nsresult
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nsFrameManager::RegisterPlaceholderFrame(nsPlaceholderFrame* aPlaceholderFrame)
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{
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NS_PRECONDITION(aPlaceholderFrame, "null param unexpected");
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NS_PRECONDITION(nsGkAtoms::placeholderFrame == aPlaceholderFrame->GetType(),
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"unexpected frame type");
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if (!mPlaceholderMap.ops) {
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if (!PL_DHashTableInit(&mPlaceholderMap, &PlaceholderMapOps, nsnull,
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sizeof(PlaceholderMapEntry), 16)) {
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mPlaceholderMap.ops = nsnull;
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return NS_ERROR_OUT_OF_MEMORY;
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}
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}
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PlaceholderMapEntry *entry = static_cast<PlaceholderMapEntry*>(PL_DHashTableOperate(&mPlaceholderMap,
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aPlaceholderFrame->GetOutOfFlowFrame(),
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PL_DHASH_ADD));
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if (!entry)
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return NS_ERROR_OUT_OF_MEMORY;
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NS_ASSERTION(!entry->placeholderFrame, "Registering a placeholder for a frame that already has a placeholder!");
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entry->placeholderFrame = aPlaceholderFrame;
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return NS_OK;
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}
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|
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void
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nsFrameManager::UnregisterPlaceholderFrame(nsPlaceholderFrame* aPlaceholderFrame)
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{
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NS_PRECONDITION(aPlaceholderFrame, "null param unexpected");
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NS_PRECONDITION(nsGkAtoms::placeholderFrame == aPlaceholderFrame->GetType(),
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"unexpected frame type");
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if (mPlaceholderMap.ops) {
|
|
PL_DHashTableOperate(&mPlaceholderMap,
|
|
aPlaceholderFrame->GetOutOfFlowFrame(),
|
|
PL_DHASH_REMOVE);
|
|
}
|
|
}
|
|
|
|
PR_STATIC_CALLBACK(PLDHashOperator)
|
|
UnregisterPlaceholders(PLDHashTable* table, PLDHashEntryHdr* hdr,
|
|
PRUint32 number, void* arg)
|
|
{
|
|
PlaceholderMapEntry* entry = static_cast<PlaceholderMapEntry*>(hdr);
|
|
entry->placeholderFrame->SetOutOfFlowFrame(nsnull);
|
|
return PL_DHASH_NEXT;
|
|
}
|
|
|
|
void
|
|
nsFrameManager::ClearPlaceholderFrameMap()
|
|
{
|
|
if (mPlaceholderMap.ops) {
|
|
PL_DHashTableEnumerate(&mPlaceholderMap, UnregisterPlaceholders, nsnull);
|
|
PL_DHashTableFinish(&mPlaceholderMap);
|
|
mPlaceholderMap.ops = nsnull;
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
nsStyleContext*
|
|
nsFrameManager::GetUndisplayedContent(nsIContent* aContent)
|
|
{
|
|
if (!aContent || !mUndisplayedMap)
|
|
return nsnull;
|
|
|
|
nsIContent* parent = aContent->GetParent();
|
|
if (!parent)
|
|
return nsnull;
|
|
|
|
for (UndisplayedNode* node = mUndisplayedMap->GetFirstNode(parent);
|
|
node; node = node->mNext) {
|
|
if (node->mContent == aContent)
|
|
return node->mStyle;
|
|
}
|
|
|
|
return nsnull;
|
|
}
|
|
|
|
void
|
|
nsFrameManager::SetUndisplayedContent(nsIContent* aContent,
|
|
nsStyleContext* aStyleContext)
|
|
{
|
|
#ifdef DEBUG_UNDISPLAYED_MAP
|
|
static int i = 0;
|
|
printf("SetUndisplayedContent(%d): p=%p \n", i++, (void *)aContent);
|
|
#endif
|
|
|
|
NS_ASSERTION(!GetUndisplayedContent(aContent),
|
|
"Already have an undisplayed context entry for aContent");
|
|
|
|
if (! mUndisplayedMap) {
|
|
mUndisplayedMap = new UndisplayedMap;
|
|
}
|
|
if (mUndisplayedMap) {
|
|
nsIContent* parent = aContent->GetParent();
|
|
NS_ASSERTION(parent, "undisplayed content must have a parent");
|
|
if (parent) {
|
|
mUndisplayedMap->AddNodeFor(parent, aContent, aStyleContext);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsFrameManager::ChangeUndisplayedContent(nsIContent* aContent,
|
|
nsStyleContext* aStyleContext)
|
|
{
|
|
NS_ASSERTION(mUndisplayedMap, "no existing undisplayed content");
|
|
|
|
#ifdef DEBUG_UNDISPLAYED_MAP
|
|
static int i = 0;
|
|
printf("ChangeUndisplayedContent(%d): p=%p \n", i++, (void *)aContent);
|
|
#endif
|
|
|
|
for (UndisplayedNode* node = mUndisplayedMap->GetFirstNode(aContent->GetParent());
|
|
node; node = node->mNext) {
|
|
if (node->mContent == aContent) {
|
|
node->mStyle = aStyleContext;
|
|
return;
|
|
}
|
|
}
|
|
|
|
NS_NOTREACHED("no existing undisplayed content");
|
|
}
|
|
|
|
void
|
|
nsFrameManager::ClearUndisplayedContentIn(nsIContent* aContent,
|
|
nsIContent* aParentContent)
|
|
{
|
|
#ifdef DEBUG_UNDISPLAYED_MAP
|
|
static int i = 0;
|
|
printf("ClearUndisplayedContent(%d): content=%p parent=%p --> ", i++, (void *)aContent, (void*)aParentContent);
|
|
#endif
|
|
|
|
if (mUndisplayedMap) {
|
|
UndisplayedNode* node = mUndisplayedMap->GetFirstNode(aParentContent);
|
|
while (node) {
|
|
if (node->mContent == aContent) {
|
|
mUndisplayedMap->RemoveNodeFor(aParentContent, node);
|
|
|
|
#ifdef DEBUG_UNDISPLAYED_MAP
|
|
printf( "REMOVED!\n");
|
|
#endif
|
|
#ifdef DEBUG
|
|
// make sure that there are no more entries for the same content
|
|
nsStyleContext *context = GetUndisplayedContent(aContent);
|
|
NS_ASSERTION(context == nsnull, "Found more undisplayed content data after removal");
|
|
#endif
|
|
return;
|
|
}
|
|
node = node->mNext;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsFrameManager::ClearAllUndisplayedContentIn(nsIContent* aParentContent)
|
|
{
|
|
#ifdef DEBUG_UNDISPLAYED_MAP
|
|
static int i = 0;
|
|
printf("ClearAllUndisplayedContentIn(%d): parent=%p \n", i++, (void*)aParentContent);
|
|
#endif
|
|
|
|
if (mUndisplayedMap) {
|
|
mUndisplayedMap->RemoveNodesFor(aParentContent);
|
|
}
|
|
}
|
|
|
|
void
|
|
nsFrameManager::ClearUndisplayedContentMap()
|
|
{
|
|
#ifdef DEBUG_UNDISPLAYED_MAP
|
|
static int i = 0;
|
|
printf("ClearUndisplayedContentMap(%d)\n", i++);
|
|
#endif
|
|
|
|
if (mUndisplayedMap) {
|
|
mUndisplayedMap->Clear();
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
nsresult
|
|
nsFrameManager::InsertFrames(nsIFrame* aParentFrame,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aPrevFrame,
|
|
nsIFrame* aFrameList)
|
|
{
|
|
NS_PRECONDITION(!aPrevFrame || (!aPrevFrame->GetNextContinuation()
|
|
|| IS_TRUE_OVERFLOW_CONTAINER(aPrevFrame->GetNextContinuation()))
|
|
&& !IS_TRUE_OVERFLOW_CONTAINER(aPrevFrame),
|
|
"aPrevFrame must be the last continuation in its chain!");
|
|
|
|
return aParentFrame->InsertFrames(aListName, aPrevFrame, aFrameList);
|
|
}
|
|
|
|
nsresult
|
|
nsFrameManager::RemoveFrame(nsIFrame* aParentFrame,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aOldFrame)
|
|
{
|
|
// In case the reflow doesn't invalidate anything since it just leaves
|
|
// a gap where the old frame was, we invalidate it here. (This is
|
|
// reasonably likely to happen when removing a last child in a way
|
|
// that doesn't change the size of the parent.)
|
|
// This has to sure to invalidate the entire overflow rect; this
|
|
// is important in the presence of absolute positioning
|
|
aOldFrame->Invalidate(aOldFrame->GetOverflowRect());
|
|
|
|
return aParentFrame->RemoveFrame(aListName, aOldFrame);
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
void
|
|
nsFrameManager::NotifyDestroyingFrame(nsIFrame* aFrame)
|
|
{
|
|
// We've already removed from the primary frame map once, but we're
|
|
// going to try to do it again here to fix callers of GetPrimaryFrameFor
|
|
// during frame destruction, since this problem keeps coming back to
|
|
// bite us. We may want to remove the previous caller.
|
|
if (mPrimaryFrameMap.ops) {
|
|
PrimaryFrameMapEntry *entry = static_cast<PrimaryFrameMapEntry*>
|
|
(PL_DHashTableOperate(&mPrimaryFrameMap, aFrame->GetContent(), PL_DHASH_LOOKUP));
|
|
if (PL_DHASH_ENTRY_IS_BUSY(entry) && entry->frame == aFrame) {
|
|
NS_NOTREACHED("frame was not removed from primary frame map before "
|
|
"destruction or was readded to map after being removed");
|
|
PL_DHashTableRawRemove(&mPrimaryFrameMap, entry);
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef NS_DEBUG
|
|
static void
|
|
DumpContext(nsIFrame* aFrame, nsStyleContext* aContext)
|
|
{
|
|
if (aFrame) {
|
|
fputs("frame: ", stdout);
|
|
nsAutoString name;
|
|
nsIFrameDebug* frameDebug;
|
|
|
|
if (NS_SUCCEEDED(aFrame->QueryInterface(NS_GET_IID(nsIFrameDebug), (void**)&frameDebug))) {
|
|
frameDebug->GetFrameName(name);
|
|
fputs(NS_LossyConvertUTF16toASCII(name).get(), stdout);
|
|
}
|
|
fprintf(stdout, " (%p)", static_cast<void*>(aFrame));
|
|
}
|
|
if (aContext) {
|
|
fprintf(stdout, " style: %p ", static_cast<void*>(aContext));
|
|
|
|
nsIAtom* pseudoTag = aContext->GetPseudoType();
|
|
if (pseudoTag) {
|
|
nsAutoString buffer;
|
|
pseudoTag->ToString(buffer);
|
|
fputs(NS_LossyConvertUTF16toASCII(buffer).get(), stdout);
|
|
fputs(" ", stdout);
|
|
}
|
|
|
|
/* XXXdwh fix debugging here. Need to add a List method to nsRuleNode
|
|
and have the context call list on its rule node.
|
|
PRInt32 count = aContext->GetStyleRuleCount();
|
|
if (0 < count) {
|
|
fputs("{\n", stdout);
|
|
nsISupportsArray* rules = aContext->GetStyleRules();
|
|
PRInt32 ix;
|
|
for (ix = 0; ix < count; ix++) {
|
|
nsIStyleRule* rule = (nsIStyleRule*)rules->ElementAt(ix);
|
|
rule->List(stdout, 1);
|
|
NS_RELEASE(rule);
|
|
}
|
|
NS_RELEASE(rules);
|
|
fputs("}\n", stdout);
|
|
}
|
|
else
|
|
*/
|
|
{
|
|
fputs("{}\n", stdout);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
VerifySameTree(nsStyleContext* aContext1, nsStyleContext* aContext2)
|
|
{
|
|
nsStyleContext* top1 = aContext1;
|
|
nsStyleContext* top2 = aContext2;
|
|
nsStyleContext* parent;
|
|
for (;;) {
|
|
parent = top1->GetParent();
|
|
if (!parent)
|
|
break;
|
|
top1 = parent;
|
|
}
|
|
for (;;) {
|
|
parent = top2->GetParent();
|
|
if (!parent)
|
|
break;
|
|
top2 = parent;
|
|
}
|
|
NS_ASSERTION(top1 == top2,
|
|
"Style contexts are not in the same style context tree");
|
|
}
|
|
|
|
static void
|
|
VerifyContextParent(nsPresContext* aPresContext, nsIFrame* aFrame,
|
|
nsStyleContext* aContext, nsStyleContext* aParentContext)
|
|
{
|
|
// get the contexts not provided
|
|
if (!aContext) {
|
|
aContext = aFrame->GetStyleContext();
|
|
}
|
|
|
|
if (!aParentContext) {
|
|
// Get the correct parent context from the frame
|
|
// - if the frame is a placeholder, we get the out of flow frame's context
|
|
// as the parent context instead of asking the frame
|
|
|
|
// get the parent context from the frame (indirectly)
|
|
nsIFrame* providerFrame = nsnull;
|
|
PRBool providerIsChild;
|
|
aFrame->GetParentStyleContextFrame(aPresContext,
|
|
&providerFrame, &providerIsChild);
|
|
if (providerFrame)
|
|
aParentContext = providerFrame->GetStyleContext();
|
|
// aParentContext could still be null
|
|
}
|
|
|
|
NS_ASSERTION(aContext, "Failure to get required contexts");
|
|
nsStyleContext* actualParentContext = aContext->GetParent();
|
|
|
|
if (aParentContext) {
|
|
if (aParentContext != actualParentContext) {
|
|
DumpContext(aFrame, aContext);
|
|
if (aContext == aParentContext) {
|
|
NS_ERROR("Using parent's style context");
|
|
}
|
|
else {
|
|
NS_ERROR("Wrong parent style context");
|
|
fputs("Wrong parent style context: ", stdout);
|
|
DumpContext(nsnull, actualParentContext);
|
|
fputs("should be using: ", stdout);
|
|
DumpContext(nsnull, aParentContext);
|
|
VerifySameTree(actualParentContext, aParentContext);
|
|
fputs("\n", stdout);
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
if (actualParentContext) {
|
|
NS_ERROR("Have parent context and shouldn't");
|
|
DumpContext(aFrame, aContext);
|
|
fputs("Has parent context: ", stdout);
|
|
DumpContext(nsnull, actualParentContext);
|
|
fputs("Should be null\n\n", stdout);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
VerifyStyleTree(nsPresContext* aPresContext, nsIFrame* aFrame,
|
|
nsStyleContext* aParentContext)
|
|
{
|
|
nsStyleContext* context = aFrame->GetStyleContext();
|
|
VerifyContextParent(aPresContext, aFrame, context, nsnull);
|
|
|
|
PRInt32 listIndex = 0;
|
|
nsIAtom* childList = nsnull;
|
|
nsIFrame* child;
|
|
|
|
do {
|
|
child = aFrame->GetFirstChild(childList);
|
|
while (child) {
|
|
if (!(child->GetStateBits() & NS_FRAME_OUT_OF_FLOW)
|
|
|| (child->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER)) {
|
|
// only do frames that don't have placeholders
|
|
if (nsGkAtoms::placeholderFrame == child->GetType()) {
|
|
// placeholder: first recurse and verify the out of flow frame,
|
|
// then verify the placeholder's context
|
|
nsIFrame* outOfFlowFrame =
|
|
nsPlaceholderFrame::GetRealFrameForPlaceholder(child);
|
|
|
|
// recurse to out of flow frame, letting the parent context get resolved
|
|
VerifyStyleTree(aPresContext, outOfFlowFrame, nsnull);
|
|
|
|
// verify placeholder using the parent frame's context as
|
|
// parent context
|
|
VerifyContextParent(aPresContext, child, nsnull, nsnull);
|
|
}
|
|
else { // regular frame
|
|
VerifyStyleTree(aPresContext, child, nsnull);
|
|
}
|
|
}
|
|
child = child->GetNextSibling();
|
|
}
|
|
|
|
childList = aFrame->GetAdditionalChildListName(listIndex++);
|
|
} while (childList);
|
|
|
|
// do additional contexts
|
|
PRInt32 contextIndex = -1;
|
|
while (1) {
|
|
nsStyleContext* extraContext = aFrame->GetAdditionalStyleContext(++contextIndex);
|
|
if (extraContext) {
|
|
VerifyContextParent(aPresContext, aFrame, extraContext, context);
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nsFrameManager::DebugVerifyStyleTree(nsIFrame* aFrame)
|
|
{
|
|
if (aFrame) {
|
|
nsStyleContext* context = aFrame->GetStyleContext();
|
|
nsStyleContext* parentContext = context->GetParent();
|
|
VerifyStyleTree(GetPresContext(), aFrame, parentContext);
|
|
}
|
|
}
|
|
|
|
#endif // DEBUG
|
|
|
|
nsresult
|
|
nsFrameManager::ReParentStyleContext(nsIFrame* aFrame)
|
|
{
|
|
if (nsGkAtoms::placeholderFrame == aFrame->GetType()) {
|
|
// Also reparent the out-of-flow
|
|
nsIFrame* outOfFlow =
|
|
nsPlaceholderFrame::GetRealFrameForPlaceholder(aFrame);
|
|
NS_ASSERTION(outOfFlow, "no out-of-flow frame");
|
|
|
|
ReParentStyleContext(outOfFlow);
|
|
}
|
|
|
|
// DO NOT verify the style tree before reparenting. The frame
|
|
// tree has already been changed, so this check would just fail.
|
|
nsStyleContext* oldContext = aFrame->GetStyleContext();
|
|
// XXXbz can oldContext really ever be null?
|
|
if (oldContext) {
|
|
nsPresContext *presContext = GetPresContext();
|
|
nsRefPtr<nsStyleContext> newContext;
|
|
nsIFrame* providerFrame = nsnull;
|
|
PRBool providerIsChild = PR_FALSE;
|
|
nsIFrame* providerChild = nsnull;
|
|
aFrame->GetParentStyleContextFrame(presContext, &providerFrame,
|
|
&providerIsChild);
|
|
nsStyleContext* newParentContext = nsnull;
|
|
if (providerIsChild) {
|
|
ReParentStyleContext(providerFrame);
|
|
newParentContext = providerFrame->GetStyleContext();
|
|
providerChild = providerFrame;
|
|
} else if (providerFrame) {
|
|
newParentContext = providerFrame->GetStyleContext();
|
|
} else {
|
|
NS_NOTREACHED("Reparenting something that has no usable parent? "
|
|
"Shouldn't happen!");
|
|
}
|
|
// XXX need to do something here to produce the correct style context
|
|
// for an IB split whose first inline part is inside a first-line frame.
|
|
// Currently the IB anonymous block's style context takes the first part's
|
|
// style context as parent, which is wrong since first-line style should
|
|
// not apply to the anonymous block.
|
|
|
|
newContext = mStyleSet->ReParentStyleContext(presContext, oldContext,
|
|
newParentContext);
|
|
if (newContext) {
|
|
if (newContext != oldContext) {
|
|
// Make sure to call CalcStyleDifference so that the new context ends
|
|
// up resolving all the structs the old context resolved.
|
|
nsChangeHint styleChange = oldContext->CalcStyleDifference(newContext);
|
|
// The style change is always 0 because we have the same rulenode and
|
|
// CalcStyleDifference optimizes us away. That's OK, though:
|
|
// reparenting should never trigger a frame reconstruct, and whenever
|
|
// it's happening we already plan to reflow and repaint the frames.
|
|
NS_ASSERTION(!(styleChange & nsChangeHint_ReconstructFrame),
|
|
"Our frame tree is likely to be bogus!");
|
|
|
|
PRInt32 listIndex = 0;
|
|
nsIAtom* childList = nsnull;
|
|
nsIFrame* child;
|
|
|
|
aFrame->SetStyleContext(newContext);
|
|
|
|
do {
|
|
child = aFrame->GetFirstChild(childList);
|
|
while (child) {
|
|
// only do frames that don't have placeholders
|
|
if ((!(child->GetStateBits() & NS_FRAME_OUT_OF_FLOW) ||
|
|
(child->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER)) &&
|
|
child != providerChild) {
|
|
#ifdef DEBUG
|
|
if (nsGkAtoms::placeholderFrame == child->GetType()) {
|
|
nsIFrame* outOfFlowFrame =
|
|
nsPlaceholderFrame::GetRealFrameForPlaceholder(child);
|
|
NS_ASSERTION(outOfFlowFrame, "no out-of-flow frame");
|
|
|
|
NS_ASSERTION(outOfFlowFrame != providerChild,
|
|
"Out of flow provider?");
|
|
}
|
|
#endif
|
|
|
|
ReParentStyleContext(child);
|
|
}
|
|
|
|
child = child->GetNextSibling();
|
|
}
|
|
|
|
childList = aFrame->GetAdditionalChildListName(listIndex++);
|
|
} while (childList);
|
|
|
|
// If this frame is part of an IB split, then the style context of
|
|
// the next part of the split might be a child of our style context.
|
|
// Reparent its style context just in case one of our ancestors
|
|
// (split or not) hasn't done so already). It's not a problem to
|
|
// reparent the same frame twice because the "if (newContext !=
|
|
// oldContext)" check will prevent us from redoing work.
|
|
if ((aFrame->GetStateBits() & NS_FRAME_IS_SPECIAL) &&
|
|
!aFrame->GetPrevInFlow()) {
|
|
nsIFrame* sib = static_cast<nsIFrame*>(aFrame->GetProperty(nsGkAtoms::IBSplitSpecialSibling));
|
|
if (sib) {
|
|
ReParentStyleContext(sib);
|
|
}
|
|
}
|
|
|
|
// do additional contexts
|
|
PRInt32 contextIndex = -1;
|
|
while (1) {
|
|
nsStyleContext* oldExtraContext =
|
|
aFrame->GetAdditionalStyleContext(++contextIndex);
|
|
if (oldExtraContext) {
|
|
nsRefPtr<nsStyleContext> newExtraContext;
|
|
newExtraContext = mStyleSet->ReParentStyleContext(presContext,
|
|
oldExtraContext,
|
|
newContext);
|
|
if (newExtraContext) {
|
|
if (newExtraContext != oldExtraContext) {
|
|
// Make sure to call CalcStyleDifference so that the new
|
|
// context ends up resolving all the structs the old context
|
|
// resolved.
|
|
styleChange =
|
|
oldExtraContext->CalcStyleDifference(newExtraContext);
|
|
// The style change is always 0 because we have the same
|
|
// rulenode and CalcStyleDifference optimizes us away. That's
|
|
// OK, though: reparenting should never trigger a frame
|
|
// reconstruct, and whenever it's happening we already plan to
|
|
// reflow and repaint the frames.
|
|
NS_ASSERTION(!(styleChange & nsChangeHint_ReconstructFrame),
|
|
"Our frame tree is likely to be bogus!");
|
|
}
|
|
|
|
aFrame->SetAdditionalStyleContext(contextIndex, newExtraContext);
|
|
}
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
#ifdef DEBUG
|
|
VerifyStyleTree(GetPresContext(), aFrame, newParentContext);
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
static nsChangeHint
|
|
CaptureChange(nsStyleContext* aOldContext, nsStyleContext* aNewContext,
|
|
nsIFrame* aFrame, nsIContent* aContent,
|
|
nsStyleChangeList* aChangeList, nsChangeHint aMinChange,
|
|
nsChangeHint aChangeToAssume)
|
|
{
|
|
nsChangeHint ourChange = aOldContext->CalcStyleDifference(aNewContext);
|
|
NS_UpdateHint(ourChange, aChangeToAssume);
|
|
if (NS_UpdateHint(aMinChange, ourChange)) {
|
|
aChangeList->AppendChange(aFrame, aContent, ourChange);
|
|
}
|
|
return aMinChange;
|
|
}
|
|
|
|
static PRBool
|
|
ShouldStopImage(imgIRequest *aOldImage, imgIRequest *aNewImage)
|
|
{
|
|
if (!aOldImage)
|
|
return PR_FALSE;
|
|
|
|
PRBool stopImages = !aNewImage;
|
|
if (!stopImages) {
|
|
nsCOMPtr<nsIURI> oldURI, newURI;
|
|
aOldImage->GetURI(getter_AddRefs(oldURI));
|
|
aNewImage->GetURI(getter_AddRefs(newURI));
|
|
PRBool equal;
|
|
stopImages =
|
|
NS_FAILED(oldURI->Equals(newURI, &equal)) || !equal;
|
|
}
|
|
return stopImages;
|
|
}
|
|
|
|
nsChangeHint
|
|
nsFrameManager::ReResolveStyleContext(nsPresContext *aPresContext,
|
|
nsIFrame *aFrame,
|
|
nsIContent *aParentContent,
|
|
nsStyleChangeList *aChangeList,
|
|
nsChangeHint aMinChange)
|
|
{
|
|
// XXXldb get new context from prev-in-flow if possible, to avoid
|
|
// duplication. (Or should we just let |GetContext| handle that?)
|
|
// Getting the hint would be nice too, but that's harder.
|
|
|
|
// XXXbryner we may be able to avoid some of the refcounting goop here.
|
|
// We do need a reference to oldContext for the lifetime of this function, and it's possible
|
|
// that the frame has the last reference to it, so AddRef it here.
|
|
|
|
nsChangeHint assumeDifferenceHint = NS_STYLE_HINT_NONE;
|
|
// XXXbz oldContext should just be an nsRefPtr
|
|
nsStyleContext* oldContext = aFrame->GetStyleContext();
|
|
nsStyleSet* styleSet = aPresContext->StyleSet();
|
|
#ifdef ACCESSIBILITY
|
|
PRBool isAccessibilityActive = mPresShell->IsAccessibilityActive();
|
|
PRBool isVisible;
|
|
if (isAccessibilityActive) {
|
|
isVisible = aFrame->GetStyleVisibility()->IsVisible();
|
|
}
|
|
#endif
|
|
|
|
// XXXbz the nsIFrame constructor takes an nsStyleContext, so how
|
|
// could oldContext be null?
|
|
if (oldContext) {
|
|
oldContext->AddRef();
|
|
nsIAtom* const pseudoTag = oldContext->GetPseudoType();
|
|
nsIContent* localContent = aFrame->GetContent();
|
|
nsIContent* content = localContent ? localContent : aParentContent;
|
|
|
|
nsStyleContext* parentContext;
|
|
nsIFrame* resolvedChild = nsnull;
|
|
// Get the frame providing the parent style context. If it is a
|
|
// child, then resolve the provider first.
|
|
nsIFrame* providerFrame = nsnull;
|
|
PRBool providerIsChild = PR_FALSE;
|
|
aFrame->GetParentStyleContextFrame(aPresContext,
|
|
&providerFrame, &providerIsChild);
|
|
if (!providerIsChild) {
|
|
if (providerFrame)
|
|
parentContext = providerFrame->GetStyleContext();
|
|
else
|
|
parentContext = nsnull;
|
|
}
|
|
else {
|
|
// resolve the provider here (before aFrame below).
|
|
|
|
// assumeDifferenceHint forces the parent's change to be also
|
|
// applied to this frame, no matter what
|
|
// nsStyleContext::CalcStyleDifference says. CalcStyleDifference
|
|
// can't be trusted because it assumes any changes to the parent
|
|
// style context provider will be automatically propagated to
|
|
// the frame(s) with child style contexts.
|
|
assumeDifferenceHint = ReResolveStyleContext(aPresContext, providerFrame,
|
|
content, aChangeList, aMinChange);
|
|
|
|
// The provider's new context becomes the parent context of
|
|
// aFrame's context.
|
|
parentContext = providerFrame->GetStyleContext();
|
|
// Set |resolvedChild| so we don't bother resolving the
|
|
// provider again.
|
|
resolvedChild = providerFrame;
|
|
}
|
|
|
|
// do primary context
|
|
// XXXbz newContext should just be an nsRefPtr
|
|
nsStyleContext* newContext = nsnull;
|
|
if (pseudoTag == nsCSSAnonBoxes::mozNonElement) {
|
|
NS_ASSERTION(localContent,
|
|
"non pseudo-element frame without content node");
|
|
newContext = styleSet->ResolveStyleForNonElement(parentContext).get();
|
|
}
|
|
else if (pseudoTag) {
|
|
nsIContent* pseudoContent =
|
|
aParentContent ? aParentContent : localContent;
|
|
if (pseudoTag == nsCSSPseudoElements::before ||
|
|
pseudoTag == nsCSSPseudoElements::after) {
|
|
// XXX what other pseudos do we need to treat like this?
|
|
newContext = styleSet->ProbePseudoStyleFor(pseudoContent,
|
|
pseudoTag,
|
|
parentContext).get();
|
|
if (!newContext) {
|
|
// This pseudo should no longer exist; gotta reframe
|
|
NS_UpdateHint(aMinChange, nsChangeHint_ReconstructFrame);
|
|
aChangeList->AppendChange(aFrame, pseudoContent,
|
|
nsChangeHint_ReconstructFrame);
|
|
// We're reframing anyway; just keep the same context
|
|
newContext = oldContext;
|
|
newContext->AddRef();
|
|
}
|
|
} else {
|
|
if (pseudoTag == nsCSSPseudoElements::firstLetter) {
|
|
NS_ASSERTION(aFrame->GetType() == nsGkAtoms::letterFrame,
|
|
"firstLetter pseudoTag without a nsFirstLetterFrame");
|
|
nsBlockFrame* block = nsBlockFrame::GetNearestAncestorBlock(aFrame);
|
|
pseudoContent = block->GetContent();
|
|
}
|
|
newContext = styleSet->ResolvePseudoStyleFor(pseudoContent,
|
|
pseudoTag,
|
|
parentContext).get();
|
|
}
|
|
}
|
|
else {
|
|
NS_ASSERTION(localContent,
|
|
"non pseudo-element frame without content node");
|
|
newContext = styleSet->ResolveStyleFor(content, parentContext).get();
|
|
}
|
|
NS_ASSERTION(newContext, "failed to get new style context");
|
|
if (newContext) {
|
|
if (!parentContext) {
|
|
if (oldContext->GetRuleNode() == newContext->GetRuleNode()) {
|
|
// We're the root of the style context tree and the new style
|
|
// context returned has the same rule node. This means that
|
|
// we can use FindChildWithRules to keep a lot of the old
|
|
// style contexts around. However, we need to start from the
|
|
// same root.
|
|
newContext->Release();
|
|
newContext = oldContext;
|
|
newContext->AddRef();
|
|
}
|
|
}
|
|
|
|
if (newContext != oldContext) {
|
|
aMinChange = CaptureChange(oldContext, newContext, aFrame,
|
|
content, aChangeList, aMinChange,
|
|
assumeDifferenceHint);
|
|
if (!(aMinChange & nsChangeHint_ReconstructFrame)) {
|
|
// if frame gets regenerated, let it keep old context
|
|
aFrame->SetStyleContext(newContext);
|
|
}
|
|
// if old context had image and new context does not have the same image,
|
|
// stop the image load for the frame
|
|
if (ShouldStopImage(
|
|
oldContext->GetStyleBackground()->mBackgroundImage,
|
|
newContext->GetStyleBackground()->mBackgroundImage)) {
|
|
// stop the image loading for the frame, the image has changed
|
|
aPresContext->StopBackgroundImageFor(aFrame);
|
|
}
|
|
|
|
imgIRequest *newBorderImage =
|
|
newContext->GetStyleBorder()->GetBorderImage();
|
|
if (ShouldStopImage(oldContext->GetStyleBorder()->GetBorderImage(),
|
|
newBorderImage)) {
|
|
// stop the image loading for the frame, the image has changed
|
|
aPresContext->StopBorderImageFor(aFrame);
|
|
}
|
|
|
|
// Since the CalcDifference call depended on the result of
|
|
// GetActualBorder() and that result depends on whether the
|
|
// image has loaded, start the image load now so that we'll get
|
|
// notified when it completes loading and can do a restyle.
|
|
// Otherwise, the image might finish loading from the network
|
|
// before we start listening to its notifications, and then
|
|
// we'll never know that it's finished loading.
|
|
if (newBorderImage) {
|
|
aPresContext->LoadBorderImage(newBorderImage, aFrame);
|
|
}
|
|
}
|
|
oldContext->Release();
|
|
}
|
|
else {
|
|
NS_ERROR("resolve style context failed");
|
|
newContext = oldContext; // new context failed, recover... (take ref)
|
|
oldContext = nsnull;
|
|
}
|
|
|
|
// do additional contexts
|
|
PRInt32 contextIndex = -1;
|
|
while (1 == 1) {
|
|
nsStyleContext* oldExtraContext = nsnull;
|
|
oldExtraContext = aFrame->GetAdditionalStyleContext(++contextIndex);
|
|
if (oldExtraContext) {
|
|
nsStyleContext* newExtraContext = nsnull;
|
|
nsIAtom* const extraPseudoTag = oldExtraContext->GetPseudoType();
|
|
NS_ASSERTION(extraPseudoTag &&
|
|
extraPseudoTag != nsCSSAnonBoxes::mozNonElement,
|
|
"extra style context is not pseudo element");
|
|
newExtraContext = styleSet->ResolvePseudoStyleFor(content,
|
|
extraPseudoTag,
|
|
newContext).get();
|
|
if (newExtraContext) {
|
|
if (oldExtraContext != newExtraContext) {
|
|
aMinChange = CaptureChange(oldExtraContext, newExtraContext,
|
|
aFrame, content, aChangeList,
|
|
aMinChange, assumeDifferenceHint);
|
|
if (!(aMinChange & nsChangeHint_ReconstructFrame)) {
|
|
aFrame->SetAdditionalStyleContext(contextIndex, newExtraContext);
|
|
}
|
|
}
|
|
newExtraContext->Release();
|
|
}
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
// now look for undisplayed child content and pseudos
|
|
if (!pseudoTag && localContent && mUndisplayedMap) {
|
|
for (UndisplayedNode* undisplayed =
|
|
mUndisplayedMap->GetFirstNode(localContent);
|
|
undisplayed; undisplayed = undisplayed->mNext) {
|
|
nsRefPtr<nsStyleContext> undisplayedContext;
|
|
nsIAtom* const undisplayedPseudoTag = undisplayed->mStyle->GetPseudoType();
|
|
if (!undisplayedPseudoTag) { // child content
|
|
undisplayedContext = styleSet->ResolveStyleFor(undisplayed->mContent,
|
|
newContext);
|
|
}
|
|
else if (undisplayedPseudoTag == nsCSSAnonBoxes::mozNonElement) {
|
|
undisplayedContext = styleSet->ResolveStyleForNonElement(newContext);
|
|
}
|
|
else { // pseudo element
|
|
NS_NOTREACHED("no pseudo elements in undisplayed map");
|
|
NS_ASSERTION(undisplayedPseudoTag, "pseudo element without tag");
|
|
undisplayedContext = styleSet->ResolvePseudoStyleFor(localContent,
|
|
undisplayedPseudoTag,
|
|
newContext);
|
|
}
|
|
if (undisplayedContext) {
|
|
const nsStyleDisplay* display = undisplayedContext->GetStyleDisplay();
|
|
if (display->mDisplay != NS_STYLE_DISPLAY_NONE) {
|
|
aChangeList->AppendChange(nsnull,
|
|
undisplayed->mContent
|
|
? static_cast<nsIContent*>
|
|
(undisplayed->mContent)
|
|
: localContent,
|
|
NS_STYLE_HINT_FRAMECHANGE);
|
|
// The node should be removed from the undisplayed map when
|
|
// we reframe it.
|
|
} else {
|
|
// update the undisplayed node with the new context
|
|
undisplayed->mStyle = undisplayedContext;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!(aMinChange & nsChangeHint_ReconstructFrame)) {
|
|
// Make sure not to do this for pseudo-frames -- those can't have :before
|
|
// or :after content. Neither can non-elements or leaf frames.
|
|
if (!pseudoTag && localContent &&
|
|
localContent->IsNodeOfType(nsINode::eELEMENT) &&
|
|
!aFrame->IsLeaf()) {
|
|
// Check for a new :before pseudo and an existing :before
|
|
// frame, but only if the frame is the first continuation.
|
|
nsIFrame* prevContinuation = aFrame->GetPrevContinuation();
|
|
if (!prevContinuation) {
|
|
// Checking for a :before frame is cheaper than getting the
|
|
// :before style context.
|
|
if (!nsLayoutUtils::GetBeforeFrame(aFrame) &&
|
|
nsLayoutUtils::HasPseudoStyle(localContent, newContext,
|
|
nsCSSPseudoElements::before,
|
|
aPresContext)) {
|
|
// Have to create the new :before frame
|
|
NS_UpdateHint(aMinChange, nsChangeHint_ReconstructFrame);
|
|
aChangeList->AppendChange(aFrame, content,
|
|
nsChangeHint_ReconstructFrame);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
if (!(aMinChange & nsChangeHint_ReconstructFrame)) {
|
|
// Make sure not to do this for pseudo-frames -- those can't have :before
|
|
// or :after content. Neither can non-elements or leaf frames.
|
|
if (!pseudoTag && localContent &&
|
|
localContent->IsNodeOfType(nsINode::eELEMENT) &&
|
|
!aFrame->IsLeaf()) {
|
|
// Check for new :after content, but only if the frame is the
|
|
// last continuation.
|
|
nsIFrame* nextContinuation = aFrame->GetNextContinuation();
|
|
|
|
if (!nextContinuation) {
|
|
// Getting the :after frame is more expensive than getting the pseudo
|
|
// context, so get the pseudo context first.
|
|
if (nsLayoutUtils::HasPseudoStyle(localContent, newContext,
|
|
nsCSSPseudoElements::after,
|
|
aPresContext) &&
|
|
!nsLayoutUtils::GetAfterFrame(aFrame)) {
|
|
// have to create the new :after frame
|
|
NS_UpdateHint(aMinChange, nsChangeHint_ReconstructFrame);
|
|
aChangeList->AppendChange(aFrame, content,
|
|
nsChangeHint_ReconstructFrame);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!(aMinChange & nsChangeHint_ReconstructFrame)) {
|
|
|
|
// There is no need to waste time crawling into a frame's children on a frame change.
|
|
// The act of reconstructing frames will force new style contexts to be resolved on all
|
|
// of this frame's descendants anyway, so we want to avoid wasting time processing
|
|
// style contexts that we're just going to throw away anyway. - dwh
|
|
|
|
// now do children
|
|
PRInt32 listIndex = 0;
|
|
nsIAtom* childList = nsnull;
|
|
|
|
do {
|
|
nsIFrame* child = aFrame->GetFirstChild(childList);
|
|
while (child) {
|
|
if (!(child->GetStateBits() & NS_FRAME_OUT_OF_FLOW)
|
|
|| (child->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER)) {
|
|
// only do frames that don't have placeholders
|
|
if (nsGkAtoms::placeholderFrame == child->GetType()) { // placeholder
|
|
// get out of flow frame and recur there
|
|
nsIFrame* outOfFlowFrame =
|
|
nsPlaceholderFrame::GetRealFrameForPlaceholder(child);
|
|
NS_ASSERTION(outOfFlowFrame, "no out-of-flow frame");
|
|
NS_ASSERTION(outOfFlowFrame != resolvedChild,
|
|
"out-of-flow frame not a true descendant");
|
|
|
|
// Note that the out-of-flow may not be a geometric descendant of
|
|
// the frame where we started the reresolve. Therefore, even if
|
|
// aMinChange already includes nsChangeHint_ReflowFrame we don't
|
|
// want to pass that on to the out-of-flow reresolve, since that
|
|
// can lead to the out-of-flow not getting reflown when it should
|
|
// be (eg a reresolve starting at <body> that involves reflowing
|
|
// the <body> would miss reflowing fixed-pos nodes that also need
|
|
// reflow). In the cases when the out-of-flow _is_ a geometric
|
|
// descendant of a frame we already have a reflow hint for,
|
|
// reflow coalescing should keep us from doing the work twice.
|
|
|
|
// |nsFrame::GetParentStyleContextFrame| checks being out
|
|
// of flow so that this works correctly.
|
|
ReResolveStyleContext(aPresContext, outOfFlowFrame,
|
|
content, aChangeList,
|
|
NS_SubtractHint(aMinChange,
|
|
nsChangeHint_ReflowFrame));
|
|
|
|
// reresolve placeholder's context under the same parent
|
|
// as the out-of-flow frame
|
|
ReResolveStyleContext(aPresContext, child, content,
|
|
aChangeList, aMinChange);
|
|
}
|
|
else { // regular child frame
|
|
if (child != resolvedChild) {
|
|
ReResolveStyleContext(aPresContext, child, content,
|
|
aChangeList, aMinChange);
|
|
} else {
|
|
NOISY_TRACE_FRAME("child frame already resolved as descendant, skipping",aFrame);
|
|
}
|
|
}
|
|
}
|
|
child = child->GetNextSibling();
|
|
}
|
|
|
|
childList = aFrame->GetAdditionalChildListName(listIndex++);
|
|
} while (childList);
|
|
// XXX need to do overflow frames???
|
|
}
|
|
|
|
newContext->Release();
|
|
}
|
|
|
|
#ifdef ACCESSIBILITY
|
|
if (isAccessibilityActive &&
|
|
aFrame->GetStyleVisibility()->IsVisible() != isVisible &&
|
|
!aFrame->GetPrevContinuation()) { // Primary frames only
|
|
// XXX Visibility does not affect descendents with visibility set
|
|
// Work on a separate, accurate mechanism for dealing with visibility changes.
|
|
// A significant enough change occured that this part
|
|
// of the accessible tree is no longer valid.
|
|
nsCOMPtr<nsIAccessibilityService> accService =
|
|
do_GetService("@mozilla.org/accessibilityService;1");
|
|
if (accService) {
|
|
accService->InvalidateSubtreeFor(mPresShell, aFrame->GetContent(),
|
|
isVisible ? nsIAccessibleEvent::EVENT_ASYNCH_HIDE :
|
|
nsIAccessibleEvent::EVENT_ASYNCH_SHOW);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return aMinChange;
|
|
}
|
|
|
|
void
|
|
nsFrameManager::ComputeStyleChangeFor(nsIFrame *aFrame,
|
|
nsStyleChangeList *aChangeList,
|
|
nsChangeHint aMinChange)
|
|
{
|
|
if (aMinChange) {
|
|
aChangeList->AppendChange(aFrame, aFrame->GetContent(), aMinChange);
|
|
}
|
|
|
|
nsChangeHint topLevelChange = aMinChange;
|
|
|
|
nsIFrame* frame = aFrame;
|
|
nsIFrame* frame2 = aFrame;
|
|
|
|
NS_ASSERTION(!frame->GetPrevContinuation(), "must start with the first in flow");
|
|
|
|
// We want to start with this frame and walk all its next-in-flows,
|
|
// as well as all its special siblings and their next-in-flows,
|
|
// reresolving style on all the frames we encounter in this walk.
|
|
|
|
nsPropertyTable *propTable = GetPresContext()->PropertyTable();
|
|
|
|
do {
|
|
// Outer loop over special siblings
|
|
do {
|
|
// Inner loop over next-in-flows of the current frame
|
|
nsChangeHint frameChange =
|
|
ReResolveStyleContext(GetPresContext(), frame, nsnull,
|
|
aChangeList, topLevelChange);
|
|
NS_UpdateHint(topLevelChange, frameChange);
|
|
|
|
if (topLevelChange & nsChangeHint_ReconstructFrame) {
|
|
// If it's going to cause a framechange, then don't bother
|
|
// with the continuations or special siblings since they'll be
|
|
// clobbered by the frame reconstruct anyway.
|
|
NS_ASSERTION(!frame->GetPrevContinuation(),
|
|
"continuing frame had more severe impact than first-in-flow");
|
|
return;
|
|
}
|
|
|
|
frame = frame->GetNextContinuation();
|
|
} while (frame);
|
|
|
|
// Might we have special siblings?
|
|
if (!(frame2->GetStateBits() & NS_FRAME_IS_SPECIAL)) {
|
|
// nothing more to do here
|
|
return;
|
|
}
|
|
|
|
frame2 = static_cast<nsIFrame*>
|
|
(propTable->GetProperty(frame2, nsGkAtoms::IBSplitSpecialSibling));
|
|
frame = frame2;
|
|
} while (frame2);
|
|
}
|
|
|
|
|
|
nsReStyleHint
|
|
nsFrameManager::HasAttributeDependentStyle(nsIContent *aContent,
|
|
nsIAtom *aAttribute,
|
|
PRInt32 aModType,
|
|
PRUint32 aStateMask)
|
|
{
|
|
nsReStyleHint hint = mStyleSet->HasAttributeDependentStyle(GetPresContext(),
|
|
aContent,
|
|
aAttribute,
|
|
aModType,
|
|
aStateMask);
|
|
|
|
if (aAttribute == nsGkAtoms::style) {
|
|
// Perhaps should check that it's XUL, SVG, (or HTML) namespace, but
|
|
// it doesn't really matter. Or we could even let
|
|
// HTMLCSSStyleSheetImpl::HasAttributeDependentStyle handle it.
|
|
hint = nsReStyleHint(hint | eReStyle_Self);
|
|
}
|
|
|
|
return hint;
|
|
}
|
|
|
|
// Capture state for a given frame.
|
|
// Accept a content id here, in some cases we may not have content (scroll position)
|
|
void
|
|
nsFrameManager::CaptureFrameStateFor(nsIFrame* aFrame,
|
|
nsILayoutHistoryState* aState,
|
|
nsIStatefulFrame::SpecialStateID aID)
|
|
{
|
|
if (!aFrame || !aState) {
|
|
NS_WARNING("null frame, or state");
|
|
return;
|
|
}
|
|
|
|
// Only capture state for stateful frames
|
|
nsIStatefulFrame* statefulFrame;
|
|
CallQueryInterface(aFrame, &statefulFrame);
|
|
|
|
if (!statefulFrame) {
|
|
return;
|
|
}
|
|
|
|
// Capture the state, exit early if we get null (nothing to save)
|
|
nsAutoPtr<nsPresState> frameState;
|
|
nsresult rv = statefulFrame->SaveState(aID, getter_Transfers(frameState));
|
|
if (!frameState) {
|
|
return;
|
|
}
|
|
|
|
// Generate the hash key to store the state under
|
|
// Exit early if we get empty key
|
|
nsCAutoString stateKey;
|
|
nsIContent* content = aFrame->GetContent();
|
|
nsIDocument* doc = content ? content->GetCurrentDoc() : nsnull;
|
|
rv = nsContentUtils::GenerateStateKey(content, doc, aID, stateKey);
|
|
if(NS_FAILED(rv) || stateKey.IsEmpty()) {
|
|
return;
|
|
}
|
|
|
|
// Store the state
|
|
rv = aState->AddState(stateKey, frameState);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
// aState owns frameState now.
|
|
frameState.forget();
|
|
}
|
|
}
|
|
|
|
void
|
|
nsFrameManager::CaptureFrameState(nsIFrame* aFrame,
|
|
nsILayoutHistoryState* aState)
|
|
{
|
|
NS_PRECONDITION(nsnull != aFrame && nsnull != aState, "null parameters passed in");
|
|
|
|
CaptureFrameStateFor(aFrame, aState);
|
|
|
|
// Now capture state recursively for the frame hierarchy rooted at aFrame
|
|
nsIAtom* childListName = nsnull;
|
|
PRInt32 childListIndex = 0;
|
|
do {
|
|
nsIFrame* childFrame = aFrame->GetFirstChild(childListName);
|
|
while (childFrame) {
|
|
CaptureFrameState(childFrame, aState);
|
|
// Get the next sibling child frame
|
|
childFrame = childFrame->GetNextSibling();
|
|
}
|
|
childListName = aFrame->GetAdditionalChildListName(childListIndex++);
|
|
} while (childListName);
|
|
}
|
|
|
|
// Restore state for a given frame.
|
|
// Accept a content id here, in some cases we may not have content (scroll position)
|
|
void
|
|
nsFrameManager::RestoreFrameStateFor(nsIFrame* aFrame,
|
|
nsILayoutHistoryState* aState,
|
|
nsIStatefulFrame::SpecialStateID aID)
|
|
{
|
|
if (!aFrame || !aState) {
|
|
NS_WARNING("null frame or state");
|
|
return;
|
|
}
|
|
|
|
// Only capture state for stateful frames
|
|
nsIStatefulFrame* statefulFrame;
|
|
CallQueryInterface(aFrame, &statefulFrame);
|
|
if (!statefulFrame) {
|
|
return;
|
|
}
|
|
|
|
// Generate the hash key the state was stored under
|
|
// Exit early if we get empty key
|
|
nsIContent* content = aFrame->GetContent();
|
|
// If we don't have content, we can't generate a hash
|
|
// key and there's probably no state information for us.
|
|
if (!content) {
|
|
return;
|
|
}
|
|
|
|
nsCAutoString stateKey;
|
|
nsIDocument* doc = content->GetCurrentDoc();
|
|
nsresult rv = nsContentUtils::GenerateStateKey(content, doc, aID, stateKey);
|
|
if (NS_FAILED(rv) || stateKey.IsEmpty()) {
|
|
return;
|
|
}
|
|
|
|
// Get the state from the hash
|
|
nsPresState *frameState;
|
|
rv = aState->GetState(stateKey, &frameState);
|
|
if (!frameState) {
|
|
return;
|
|
}
|
|
|
|
// Restore it
|
|
rv = statefulFrame->RestoreState(frameState);
|
|
if (NS_FAILED(rv)) {
|
|
return;
|
|
}
|
|
|
|
// If we restore ok, remove the state from the state table
|
|
aState->RemoveState(stateKey);
|
|
}
|
|
|
|
void
|
|
nsFrameManager::RestoreFrameState(nsIFrame* aFrame,
|
|
nsILayoutHistoryState* aState)
|
|
{
|
|
NS_PRECONDITION(nsnull != aFrame && nsnull != aState, "null parameters passed in");
|
|
|
|
RestoreFrameStateFor(aFrame, aState);
|
|
|
|
// Now restore state recursively for the frame hierarchy rooted at aFrame
|
|
nsIAtom* childListName = nsnull;
|
|
PRInt32 childListIndex = 0;
|
|
do {
|
|
nsIFrame* childFrame = aFrame->GetFirstChild(childListName);
|
|
while (childFrame) {
|
|
RestoreFrameState(childFrame, aState);
|
|
// Get the next sibling child frame
|
|
childFrame = childFrame->GetNextSibling();
|
|
}
|
|
childListName = aFrame->GetAdditionalChildListName(childListIndex++);
|
|
} while (childListName);
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
static PLHashNumber
|
|
HashKey(void* key)
|
|
{
|
|
return NS_PTR_TO_INT32(key);
|
|
}
|
|
|
|
static PRIntn
|
|
CompareKeys(void* key1, void* key2)
|
|
{
|
|
return key1 == key2;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
nsFrameManagerBase::UndisplayedMap::UndisplayedMap(PRUint32 aNumBuckets)
|
|
{
|
|
MOZ_COUNT_CTOR(nsFrameManagerBase::UndisplayedMap);
|
|
mTable = PL_NewHashTable(aNumBuckets, (PLHashFunction)HashKey,
|
|
(PLHashComparator)CompareKeys,
|
|
(PLHashComparator)nsnull,
|
|
nsnull, nsnull);
|
|
mLastLookup = nsnull;
|
|
}
|
|
|
|
nsFrameManagerBase::UndisplayedMap::~UndisplayedMap(void)
|
|
{
|
|
MOZ_COUNT_DTOR(nsFrameManagerBase::UndisplayedMap);
|
|
Clear();
|
|
PL_HashTableDestroy(mTable);
|
|
}
|
|
|
|
PLHashEntry**
|
|
nsFrameManagerBase::UndisplayedMap::GetEntryFor(nsIContent* aParentContent)
|
|
{
|
|
if (mLastLookup && (aParentContent == (*mLastLookup)->key)) {
|
|
return mLastLookup;
|
|
}
|
|
PLHashNumber hashCode = NS_PTR_TO_INT32(aParentContent);
|
|
PLHashEntry** entry = PL_HashTableRawLookup(mTable, hashCode, aParentContent);
|
|
if (*entry) {
|
|
mLastLookup = entry;
|
|
}
|
|
return entry;
|
|
}
|
|
|
|
UndisplayedNode*
|
|
nsFrameManagerBase::UndisplayedMap::GetFirstNode(nsIContent* aParentContent)
|
|
{
|
|
PLHashEntry** entry = GetEntryFor(aParentContent);
|
|
if (*entry) {
|
|
return (UndisplayedNode*)((*entry)->value);
|
|
}
|
|
return nsnull;
|
|
}
|
|
|
|
void
|
|
nsFrameManagerBase::UndisplayedMap::AppendNodeFor(UndisplayedNode* aNode,
|
|
nsIContent* aParentContent)
|
|
{
|
|
PLHashEntry** entry = GetEntryFor(aParentContent);
|
|
if (*entry) {
|
|
UndisplayedNode* node = (UndisplayedNode*)((*entry)->value);
|
|
while (node->mNext) {
|
|
if (node->mContent == aNode->mContent) {
|
|
// We actually need to check this in optimized builds because
|
|
// there are some callers that do this. See bug 118014, bug
|
|
// 136704, etc.
|
|
NS_NOTREACHED("node in map twice");
|
|
delete aNode;
|
|
return;
|
|
}
|
|
node = node->mNext;
|
|
}
|
|
node->mNext = aNode;
|
|
}
|
|
else {
|
|
PLHashNumber hashCode = NS_PTR_TO_INT32(aParentContent);
|
|
PL_HashTableRawAdd(mTable, entry, hashCode, aParentContent, aNode);
|
|
mLastLookup = nsnull; // hashtable may have shifted bucket out from under us
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
nsFrameManagerBase::UndisplayedMap::AddNodeFor(nsIContent* aParentContent,
|
|
nsIContent* aChild,
|
|
nsStyleContext* aStyle)
|
|
{
|
|
UndisplayedNode* node = new UndisplayedNode(aChild, aStyle);
|
|
if (! node) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
AppendNodeFor(node, aParentContent);
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsFrameManagerBase::UndisplayedMap::RemoveNodeFor(nsIContent* aParentContent,
|
|
UndisplayedNode* aNode)
|
|
{
|
|
PLHashEntry** entry = GetEntryFor(aParentContent);
|
|
NS_ASSERTION(*entry, "content not in map");
|
|
if (*entry) {
|
|
if ((UndisplayedNode*)((*entry)->value) == aNode) { // first node
|
|
if (aNode->mNext) {
|
|
(*entry)->value = aNode->mNext;
|
|
aNode->mNext = nsnull;
|
|
}
|
|
else {
|
|
PL_HashTableRawRemove(mTable, entry, *entry);
|
|
mLastLookup = nsnull; // hashtable may have shifted bucket out from under us
|
|
}
|
|
}
|
|
else {
|
|
UndisplayedNode* node = (UndisplayedNode*)((*entry)->value);
|
|
while (node->mNext) {
|
|
if (node->mNext == aNode) {
|
|
node->mNext = aNode->mNext;
|
|
aNode->mNext = nsnull;
|
|
break;
|
|
}
|
|
node = node->mNext;
|
|
}
|
|
}
|
|
}
|
|
delete aNode;
|
|
}
|
|
|
|
void
|
|
nsFrameManagerBase::UndisplayedMap::RemoveNodesFor(nsIContent* aParentContent)
|
|
{
|
|
PLHashEntry** entry = GetEntryFor(aParentContent);
|
|
NS_ASSERTION(entry, "content not in map");
|
|
if (*entry) {
|
|
UndisplayedNode* node = (UndisplayedNode*)((*entry)->value);
|
|
NS_ASSERTION(node, "null node for non-null entry in UndisplayedMap");
|
|
delete node;
|
|
PL_HashTableRawRemove(mTable, entry, *entry);
|
|
mLastLookup = nsnull; // hashtable may have shifted bucket out from under us
|
|
}
|
|
}
|
|
|
|
PR_STATIC_CALLBACK(PRIntn)
|
|
RemoveUndisplayedEntry(PLHashEntry* he, PRIntn i, void* arg)
|
|
{
|
|
UndisplayedNode* node = (UndisplayedNode*)(he->value);
|
|
delete node;
|
|
// Remove and free this entry and continue enumerating
|
|
return HT_ENUMERATE_REMOVE | HT_ENUMERATE_NEXT;
|
|
}
|
|
|
|
void
|
|
nsFrameManagerBase::UndisplayedMap::Clear(void)
|
|
{
|
|
mLastLookup = nsnull;
|
|
PL_HashTableEnumerateEntries(mTable, RemoveUndisplayedEntry, 0);
|
|
}
|