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synced 2024-09-13 09:24:08 -07:00
0fd9123eac
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echo "Converting $1 to $2..."
find . ! -wholename "*nsprpub*" \
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! -wholename "*/.hg*" \
! -wholename "obj-ff-dbg*" \
! -name nsXPCOMCID.h \
! -name prtypes.h \
-type f \
\( -iname "*.cpp" \
-o -iname "*.h" \
-o -iname "*.c" \
-o -iname "*.cc" \
-o -iname "*.idl" \
-o -iname "*.ipdl" \
-o -iname "*.ipdlh" \
-o -iname "*.mm" \) | \
xargs -n 1 sed -i -e "s/\b$1\b/$2/g"
}
convert PRInt8 int8_t
convert PRUint8 uint8_t
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convert PRUint16 uint16_t
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1998 lines
76 KiB
C++
1998 lines
76 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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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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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 DEBUG
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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 "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 "nsError.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 "nsTransitionManager.h"
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#include "RestyleTracker.h"
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#include "nsAbsoluteContainingBlock.h"
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#include "nsFrameManager.h"
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#include "nsRuleProcessorData.h"
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#ifdef ACCESSIBILITY
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#include "nsAccessibilityService.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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using namespace mozilla;
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using namespace mozilla::dom;
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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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static bool
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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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// 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(nullptr)
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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 iteratively to avoid blowing up the stack (bug 460461).
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UndisplayedNode *cur = mNext;
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while (cur) {
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UndisplayedNode *next = cur->mNext;
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cur->mNext = nullptr;
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delete cur;
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cur = next;
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}
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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(uint32_t 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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NS_ASSERTION(!mPresShell, "nsFrameManager::Destroy never called");
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}
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nsresult
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nsFrameManager::Init(nsStyleSet* aStyleSet)
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{
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if (!mPresShell) {
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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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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(true);
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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 = nullptr;
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}
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delete mUndisplayedMap;
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mUndisplayedMap = nullptr;
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mPresShell = nullptr;
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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(const 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 nullptr;
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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, nullptr,
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sizeof(PlaceholderMapEntry), 16)) {
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mPlaceholderMap.ops = nullptr;
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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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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) {
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PL_DHashTableOperate(&mPlaceholderMap,
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aPlaceholderFrame->GetOutOfFlowFrame(),
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PL_DHASH_REMOVE);
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}
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}
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static PLDHashOperator
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UnregisterPlaceholders(PLDHashTable* table, PLDHashEntryHdr* hdr,
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uint32_t number, void* arg)
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{
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PlaceholderMapEntry* entry = static_cast<PlaceholderMapEntry*>(hdr);
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entry->placeholderFrame->SetOutOfFlowFrame(nullptr);
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return PL_DHASH_NEXT;
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}
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void
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nsFrameManager::ClearPlaceholderFrameMap()
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{
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if (mPlaceholderMap.ops) {
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PL_DHashTableEnumerate(&mPlaceholderMap, UnregisterPlaceholders, nullptr);
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PL_DHashTableFinish(&mPlaceholderMap);
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mPlaceholderMap.ops = nullptr;
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}
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}
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//----------------------------------------------------------------------
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nsStyleContext*
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nsFrameManager::GetUndisplayedContent(nsIContent* aContent)
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{
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if (!aContent || !mUndisplayedMap)
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return nullptr;
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nsIContent* parent = aContent->GetParent();
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for (UndisplayedNode* node = mUndisplayedMap->GetFirstNode(parent);
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node; node = node->mNext) {
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if (node->mContent == aContent)
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return node->mStyle;
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}
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return nullptr;
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}
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void
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nsFrameManager::SetUndisplayedContent(nsIContent* aContent,
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nsStyleContext* aStyleContext)
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{
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NS_PRECONDITION(!aStyleContext->GetPseudo(),
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"Should only have actual elements here");
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#ifdef DEBUG_UNDISPLAYED_MAP
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static int i = 0;
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printf("SetUndisplayedContent(%d): p=%p \n", i++, (void *)aContent);
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#endif
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NS_ASSERTION(!GetUndisplayedContent(aContent),
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"Already have an undisplayed context entry for aContent");
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if (! mUndisplayedMap) {
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mUndisplayedMap = new UndisplayedMap;
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}
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nsIContent* parent = aContent->GetParent();
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NS_ASSERTION(parent || (mPresShell && mPresShell->GetDocument() &&
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mPresShell->GetDocument()->GetRootElement() == aContent),
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"undisplayed content must have a parent, unless it's the root "
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"element");
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mUndisplayedMap->AddNodeFor(parent, aContent, aStyleContext);
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}
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void
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nsFrameManager::ChangeUndisplayedContent(nsIContent* aContent,
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nsStyleContext* aStyleContext)
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{
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NS_ASSERTION(mUndisplayedMap, "no existing undisplayed content");
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#ifdef DEBUG_UNDISPLAYED_MAP
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static int i = 0;
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printf("ChangeUndisplayedContent(%d): p=%p \n", i++, (void *)aContent);
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#endif
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for (UndisplayedNode* node = mUndisplayedMap->GetFirstNode(aContent->GetParent());
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node; node = node->mNext) {
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if (node->mContent == aContent) {
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node->mStyle = aStyleContext;
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return;
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}
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}
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NS_NOTREACHED("no existing undisplayed content");
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}
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void
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nsFrameManager::ClearUndisplayedContentIn(nsIContent* aContent,
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nsIContent* aParentContent)
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{
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#ifdef DEBUG_UNDISPLAYED_MAP
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static int i = 0;
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printf("ClearUndisplayedContent(%d): content=%p parent=%p --> ", i++, (void *)aContent, (void*)aParentContent);
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#endif
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if (mUndisplayedMap) {
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UndisplayedNode* node = mUndisplayedMap->GetFirstNode(aParentContent);
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while (node) {
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if (node->mContent == aContent) {
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mUndisplayedMap->RemoveNodeFor(aParentContent, node);
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#ifdef DEBUG_UNDISPLAYED_MAP
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printf( "REMOVED!\n");
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#endif
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#ifdef DEBUG
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// make sure that there are no more entries for the same content
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nsStyleContext *context = GetUndisplayedContent(aContent);
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NS_ASSERTION(context == nullptr, "Found more undisplayed content data after removal");
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#endif
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return;
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}
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node = node->mNext;
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}
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}
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}
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void
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nsFrameManager::ClearAllUndisplayedContentIn(nsIContent* aParentContent)
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{
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#ifdef DEBUG_UNDISPLAYED_MAP
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static int i = 0;
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printf("ClearAllUndisplayedContentIn(%d): parent=%p \n", i++, (void*)aParentContent);
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#endif
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if (mUndisplayedMap) {
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mUndisplayedMap->RemoveNodesFor(aParentContent);
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}
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// Need to look at aParentContent's content list due to XBL insertions.
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// Nodes in aParentContent's content list do not have aParentContent as a
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// parent, but are treated as children of aParentContent. We get access to
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// the content list via GetXBLChildNodesFor and just ignore any nodes we
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// don't care about.
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nsINodeList* list =
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aParentContent->OwnerDoc()->BindingManager()->GetXBLChildNodesFor(aParentContent);
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if (list) {
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uint32_t length;
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list->GetLength(&length);
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for (uint32_t i = 0; i < length; ++i) {
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nsIContent* child = list->GetNodeAt(i);
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if (child->GetParent() != aParentContent) {
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ClearUndisplayedContentIn(child, child->GetParent());
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}
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}
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}
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}
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//----------------------------------------------------------------------
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nsresult
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nsFrameManager::AppendFrames(nsIFrame* aParentFrame,
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ChildListID aListID,
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nsFrameList& aFrameList)
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{
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if (aParentFrame->IsAbsoluteContainer() &&
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aListID == aParentFrame->GetAbsoluteListID()) {
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return aParentFrame->GetAbsoluteContainingBlock()->
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AppendFrames(aParentFrame, aListID, aFrameList);
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} else {
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return aParentFrame->AppendFrames(aListID, aFrameList);
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}
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}
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nsresult
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nsFrameManager::InsertFrames(nsIFrame* aParentFrame,
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ChildListID aListID,
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nsIFrame* aPrevFrame,
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nsFrameList& aFrameList)
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{
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NS_PRECONDITION(!aPrevFrame || (!aPrevFrame->GetNextContinuation()
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|| (aPrevFrame->GetNextContinuation()->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER))
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&& !(aPrevFrame->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER),
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|
"aPrevFrame must be the last continuation in its chain!");
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if (aParentFrame->IsAbsoluteContainer() &&
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aListID == aParentFrame->GetAbsoluteListID()) {
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return aParentFrame->GetAbsoluteContainingBlock()->
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InsertFrames(aParentFrame, aListID, aPrevFrame, aFrameList);
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} else {
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return aParentFrame->InsertFrames(aListID, aPrevFrame, aFrameList);
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}
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}
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nsresult
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nsFrameManager::RemoveFrame(ChildListID aListID,
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nsIFrame* aOldFrame,
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bool aInvalidate /* = true */)
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{
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bool wasDestroyingFrames = mIsDestroyingFrames;
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mIsDestroyingFrames = true;
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// In case the reflow doesn't invalidate anything since it just leaves
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// a gap where the old frame was, we invalidate it here. (This is
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// reasonably likely to happen when removing a last child in a way
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// that doesn't change the size of the parent.)
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// This has to sure to invalidate the entire overflow rect; this
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// is important in the presence of absolute positioning
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if (aInvalidate) {
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aOldFrame->InvalidateFrameSubtree();
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}
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NS_ASSERTION(!aOldFrame->GetPrevContinuation() ||
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// exception for nsCSSFrameConstructor::RemoveFloatingFirstLetterFrames
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|
aOldFrame->GetType() == nsGkAtoms::textFrame,
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|
"Must remove first continuation.");
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NS_ASSERTION(!(aOldFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW &&
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GetPlaceholderFrameFor(aOldFrame)),
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|
"Must call RemoveFrame on placeholder for out-of-flows.");
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nsresult rv = NS_OK;
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nsIFrame* parentFrame = aOldFrame->GetParent();
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if (parentFrame->IsAbsoluteContainer() &&
|
|
aListID == parentFrame->GetAbsoluteListID()) {
|
|
parentFrame->GetAbsoluteContainingBlock()->
|
|
RemoveFrame(parentFrame, aListID, aOldFrame);
|
|
} else {
|
|
rv = parentFrame->RemoveFrame(aListID, aOldFrame);
|
|
}
|
|
|
|
mIsDestroyingFrames = wasDestroyingFrames;
|
|
|
|
return rv;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
void
|
|
nsFrameManager::NotifyDestroyingFrame(nsIFrame* aFrame)
|
|
{
|
|
nsIContent* content = aFrame->GetContent();
|
|
if (content && content->GetPrimaryFrame() == aFrame) {
|
|
ClearAllUndisplayedContentIn(content);
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
static void
|
|
DumpContext(nsIFrame* aFrame, nsStyleContext* aContext)
|
|
{
|
|
if (aFrame) {
|
|
fputs("frame: ", stdout);
|
|
nsAutoString name;
|
|
aFrame->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->GetPseudo();
|
|
if (pseudoTag) {
|
|
nsAutoString buffer;
|
|
pseudoTag->ToString(buffer);
|
|
fputs(NS_LossyConvertUTF16toASCII(buffer).get(), stdout);
|
|
fputs(" ", stdout);
|
|
}
|
|
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 = aFrame->GetParentStyleContextFrame();
|
|
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(nullptr, actualParentContext);
|
|
fputs("should be using: ", stdout);
|
|
DumpContext(nullptr, 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(nullptr, actualParentContext);
|
|
fputs("Should be null\n\n", stdout);
|
|
}
|
|
}
|
|
|
|
nsStyleContext* childStyleIfVisited = aContext->GetStyleIfVisited();
|
|
// Either childStyleIfVisited has aContext->GetParent()->GetStyleIfVisited()
|
|
// as the parent or it has a different rulenode from aContext _and_ has
|
|
// aContext->GetParent() as the parent.
|
|
if (childStyleIfVisited &&
|
|
!((childStyleIfVisited->GetRuleNode() != aContext->GetRuleNode() &&
|
|
childStyleIfVisited->GetParent() == aContext->GetParent()) ||
|
|
childStyleIfVisited->GetParent() ==
|
|
aContext->GetParent()->GetStyleIfVisited())) {
|
|
NS_ERROR("Visited style has wrong parent");
|
|
DumpContext(aFrame, aContext);
|
|
fputs("\n", stdout);
|
|
}
|
|
}
|
|
|
|
static void
|
|
VerifyStyleTree(nsPresContext* aPresContext, nsIFrame* aFrame,
|
|
nsStyleContext* aParentContext)
|
|
{
|
|
nsStyleContext* context = aFrame->GetStyleContext();
|
|
VerifyContextParent(aPresContext, aFrame, context, nullptr);
|
|
|
|
nsIFrame::ChildListIterator lists(aFrame);
|
|
for (; !lists.IsDone(); lists.Next()) {
|
|
nsFrameList::Enumerator childFrames(lists.CurrentList());
|
|
for (; !childFrames.AtEnd(); childFrames.Next()) {
|
|
nsIFrame* child = childFrames.get();
|
|
if (!(child->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) {
|
|
// only do frames that are in flow
|
|
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
|
|
do {
|
|
VerifyStyleTree(aPresContext, outOfFlowFrame, nullptr);
|
|
} while ((outOfFlowFrame = outOfFlowFrame->GetNextContinuation()));
|
|
|
|
// verify placeholder using the parent frame's context as
|
|
// parent context
|
|
VerifyContextParent(aPresContext, child, nullptr, nullptr);
|
|
}
|
|
else { // regular frame
|
|
VerifyStyleTree(aPresContext, child, nullptr);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// do additional contexts
|
|
int32_t 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
|
|
|
|
// aContent must be the content for the frame in question, which may be
|
|
// :before/:after content
|
|
static void
|
|
TryStartingTransition(nsPresContext *aPresContext, nsIContent *aContent,
|
|
nsStyleContext *aOldStyleContext,
|
|
nsRefPtr<nsStyleContext> *aNewStyleContext /* inout */)
|
|
{
|
|
if (!aContent || !aContent->IsElement()) {
|
|
return;
|
|
}
|
|
|
|
// Notify the transition manager, and if it starts a transition,
|
|
// it will give us back a transition-covering style rule which
|
|
// we'll use to get *another* style context. We want to ignore
|
|
// any already-running transitions, but cover up any that we're
|
|
// currently starting with their start value so we don't start
|
|
// them again for descendants that inherit that value.
|
|
nsCOMPtr<nsIStyleRule> coverRule =
|
|
aPresContext->TransitionManager()->StyleContextChanged(
|
|
aContent->AsElement(), aOldStyleContext, *aNewStyleContext);
|
|
if (coverRule) {
|
|
nsCOMArray<nsIStyleRule> rules;
|
|
rules.AppendObject(coverRule);
|
|
*aNewStyleContext = aPresContext->StyleSet()->
|
|
ResolveStyleByAddingRules(*aNewStyleContext, rules);
|
|
}
|
|
}
|
|
|
|
static inline Element*
|
|
ElementForStyleContext(nsIContent* aParentContent,
|
|
nsIFrame* aFrame,
|
|
nsCSSPseudoElements::Type aPseudoType)
|
|
{
|
|
// We don't expect XUL tree stuff here.
|
|
NS_PRECONDITION(aPseudoType == nsCSSPseudoElements::ePseudo_NotPseudoElement ||
|
|
aPseudoType == nsCSSPseudoElements::ePseudo_AnonBox ||
|
|
aPseudoType < nsCSSPseudoElements::ePseudo_PseudoElementCount,
|
|
"Unexpected pseudo");
|
|
// XXX see the comments about the various element confusion in
|
|
// ReResolveStyleContext.
|
|
if (aPseudoType == nsCSSPseudoElements::ePseudo_NotPseudoElement) {
|
|
return aFrame->GetContent()->AsElement();
|
|
}
|
|
|
|
if (aPseudoType == nsCSSPseudoElements::ePseudo_AnonBox) {
|
|
return nullptr;
|
|
}
|
|
|
|
if (aPseudoType == nsCSSPseudoElements::ePseudo_firstLetter) {
|
|
NS_ASSERTION(aFrame->GetType() == nsGkAtoms::letterFrame,
|
|
"firstLetter pseudoTag without a nsFirstLetterFrame");
|
|
nsBlockFrame* block = nsBlockFrame::GetNearestAncestorBlock(aFrame);
|
|
return block->GetContent()->AsElement();
|
|
}
|
|
|
|
nsIContent* content = aParentContent ? aParentContent : aFrame->GetContent();
|
|
return content->AsElement();
|
|
}
|
|
|
|
static nsIFrame*
|
|
GetPrevContinuationWithPossiblySameStyle(nsIFrame* aFrame)
|
|
{
|
|
// Account for {ib} splits when looking for "prevContinuation". In
|
|
// particular, for the first-continuation of a part of an {ib} split we
|
|
// want to use the special prevsibling of the special prevsibling of
|
|
// aFrame, which should have the same style context as aFrame itself.
|
|
// In particular, if aFrame is the first continuation of an inline part
|
|
// of an {ib} split then its special prevsibling is a block, and the
|
|
// special prevsibling of _that_ is an inline, just like aFrame.
|
|
// Similarly, if aFrame is the first continuation of a block part of an
|
|
// {ib} split (an {ib} wrapper block), then its special prevsibling is
|
|
// an inline and the special prevsibling of that is either another {ib}
|
|
// wrapper block block or null.
|
|
nsIFrame *prevContinuation = aFrame->GetPrevContinuation();
|
|
if (!prevContinuation && (aFrame->GetStateBits() & NS_FRAME_IS_SPECIAL)) {
|
|
// We're the first continuation, so we can just get the frame
|
|
// property directly
|
|
prevContinuation = static_cast<nsIFrame*>(
|
|
aFrame->Properties().Get(nsIFrame::IBSplitSpecialPrevSibling()));
|
|
if (prevContinuation) {
|
|
prevContinuation = static_cast<nsIFrame*>(
|
|
prevContinuation->Properties().Get(nsIFrame::IBSplitSpecialPrevSibling()));
|
|
}
|
|
}
|
|
return prevContinuation;
|
|
}
|
|
|
|
nsresult
|
|
nsFrameManager::ReparentStyleContext(nsIFrame* aFrame)
|
|
{
|
|
if (nsGkAtoms::placeholderFrame == aFrame->GetType()) {
|
|
// Also reparent the out-of-flow and all its continuations.
|
|
nsIFrame* outOfFlow =
|
|
nsPlaceholderFrame::GetRealFrameForPlaceholder(aFrame);
|
|
NS_ASSERTION(outOfFlow, "no out-of-flow frame");
|
|
do {
|
|
ReparentStyleContext(outOfFlow);
|
|
} while ((outOfFlow = outOfFlow->GetNextContinuation()));
|
|
}
|
|
|
|
// 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) {
|
|
nsRefPtr<nsStyleContext> newContext;
|
|
nsIFrame* providerFrame = aFrame->GetParentStyleContextFrame();
|
|
bool isChild = providerFrame && providerFrame->GetParent() == aFrame;
|
|
nsStyleContext* newParentContext = nullptr;
|
|
nsIFrame* providerChild = nullptr;
|
|
if (isChild) {
|
|
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 first 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.
|
|
|
|
#ifdef DEBUG
|
|
{
|
|
// Check that our assumption that continuations of the same
|
|
// pseudo-type and with the same style context parent have the
|
|
// same style context is valid before the reresolution. (We need
|
|
// to check the pseudo-type and style context parent because of
|
|
// :first-letter and :first-line, where we create styled and
|
|
// unstyled letter/line frames distinguished by pseudo-type, and
|
|
// then need to distinguish their descendants based on having
|
|
// different parents.)
|
|
nsIFrame *nextContinuation = aFrame->GetNextContinuation();
|
|
if (nextContinuation) {
|
|
nsStyleContext *nextContinuationContext =
|
|
nextContinuation->GetStyleContext();
|
|
NS_ASSERTION(oldContext == nextContinuationContext ||
|
|
oldContext->GetPseudo() !=
|
|
nextContinuationContext->GetPseudo() ||
|
|
oldContext->GetParent() !=
|
|
nextContinuationContext->GetParent(),
|
|
"continuations should have the same style context");
|
|
}
|
|
}
|
|
#endif
|
|
|
|
nsIFrame *prevContinuation =
|
|
GetPrevContinuationWithPossiblySameStyle(aFrame);
|
|
nsStyleContext *prevContinuationContext;
|
|
bool copyFromContinuation =
|
|
prevContinuation &&
|
|
(prevContinuationContext = prevContinuation->GetStyleContext())
|
|
->GetPseudo() == oldContext->GetPseudo() &&
|
|
prevContinuationContext->GetParent() == newParentContext;
|
|
if (copyFromContinuation) {
|
|
// Just use the style context from the frame's previous
|
|
// continuation (see assertion about aFrame->GetNextContinuation()
|
|
// above, which we would have previously hit for aFrame's previous
|
|
// continuation).
|
|
newContext = prevContinuationContext;
|
|
} else {
|
|
nsIFrame* parentFrame = aFrame->GetParent();
|
|
Element* element =
|
|
ElementForStyleContext(parentFrame ? parentFrame->GetContent() : nullptr,
|
|
aFrame,
|
|
oldContext->GetPseudoType());
|
|
newContext = mStyleSet->ReparentStyleContext(oldContext,
|
|
newParentContext,
|
|
element);
|
|
}
|
|
|
|
if (newContext) {
|
|
if (newContext != oldContext) {
|
|
// We probably don't want to initiate transitions from
|
|
// ReparentStyleContext, since we call it during frame
|
|
// construction rather than in response to dynamic changes.
|
|
// Also see the comment at the start of
|
|
// nsTransitionManager::ConsiderStartingTransition.
|
|
#if 0
|
|
if (!copyFromContinuation) {
|
|
TryStartingTransition(GetPresContext(), aFrame->GetContent(),
|
|
oldContext, &newContext);
|
|
}
|
|
#endif
|
|
|
|
// 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!");
|
|
|
|
aFrame->SetStyleContext(newContext);
|
|
|
|
nsIFrame::ChildListIterator lists(aFrame);
|
|
for (; !lists.IsDone(); lists.Next()) {
|
|
nsFrameList::Enumerator childFrames(lists.CurrentList());
|
|
for (; !childFrames.AtEnd(); childFrames.Next()) {
|
|
nsIFrame* child = childFrames.get();
|
|
// only do frames that are in flow
|
|
if (!(child->GetStateBits() & NS_FRAME_OUT_OF_FLOW) &&
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
// 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->GetPrevContinuation()) {
|
|
nsIFrame* sib = static_cast<nsIFrame*>
|
|
(aFrame->Properties().Get(nsIFrame::IBSplitSpecialSibling()));
|
|
if (sib) {
|
|
ReparentStyleContext(sib);
|
|
}
|
|
}
|
|
|
|
// do additional contexts
|
|
int32_t contextIndex = -1;
|
|
while (1) {
|
|
nsStyleContext* oldExtraContext =
|
|
aFrame->GetAdditionalStyleContext(++contextIndex);
|
|
if (oldExtraContext) {
|
|
nsRefPtr<nsStyleContext> newExtraContext;
|
|
newExtraContext = mStyleSet->ReparentStyleContext(oldExtraContext,
|
|
newContext,
|
|
nullptr);
|
|
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_ASSERTION(!(ourChange & nsChangeHint_ReflowFrame) ||
|
|
(ourChange & nsChangeHint_NeedReflow),
|
|
"Reflow hint bits set without actually asking for a reflow");
|
|
|
|
NS_UpdateHint(ourChange, aChangeToAssume);
|
|
if (NS_UpdateHint(aMinChange, ourChange)) {
|
|
if (!(ourChange & nsChangeHint_ReconstructFrame) || aContent) {
|
|
aChangeList->AppendChange(aFrame, aContent, ourChange);
|
|
}
|
|
}
|
|
return aMinChange;
|
|
}
|
|
|
|
/**
|
|
* Recompute style for aFrame and accumulate changes into aChangeList
|
|
* given that aMinChange is already accumulated for an ancestor.
|
|
* aParentContent is the content node used to resolve the parent style
|
|
* context. This means that, for pseudo-elements, it is the content
|
|
* that should be used for selector matching (rather than the fake
|
|
* content node attached to the frame).
|
|
*/
|
|
nsChangeHint
|
|
nsFrameManager::ReResolveStyleContext(nsPresContext *aPresContext,
|
|
nsIFrame *aFrame,
|
|
nsIContent *aParentContent,
|
|
nsStyleChangeList *aChangeList,
|
|
nsChangeHint aMinChange,
|
|
nsRestyleHint aRestyleHint,
|
|
RestyleTracker& aRestyleTracker,
|
|
DesiredA11yNotifications aDesiredA11yNotifications,
|
|
nsTArray<nsIContent*>& aVisibleKidsOfHiddenElement,
|
|
TreeMatchContext &aTreeMatchContext)
|
|
{
|
|
if (!NS_IsHintSubset(nsChangeHint_NeedDirtyReflow, aMinChange)) {
|
|
// If aMinChange doesn't include nsChangeHint_NeedDirtyReflow, clear out
|
|
// all the reflow change bits from it, so that we'll make sure to append a
|
|
// change to the list for ourselves if we need a reflow. We need this
|
|
// because the parent may or may not actually end up reflowing us
|
|
// otherwise.
|
|
aMinChange = NS_SubtractHint(aMinChange, nsChangeHint_ReflowFrame);
|
|
} else if (!NS_IsHintSubset(nsChangeHint_ClearDescendantIntrinsics,
|
|
aMinChange)) {
|
|
// If aMinChange doesn't include nsChangeHint_ClearDescendantIntrinsics,
|
|
// clear out the nsChangeHint_ClearAncestorIntrinsics flag, since it's
|
|
// possible that we had some random ancestor that cleared ancestor
|
|
// intrinsic widths, but we still need to clear intrinsic widths on frames
|
|
// that are our ancestors but its descendants.
|
|
aMinChange =
|
|
NS_SubtractHint(aMinChange, nsChangeHint_ClearAncestorIntrinsics);
|
|
}
|
|
|
|
// We need to generate a new change list entry for every frame whose style
|
|
// comparision returns one of these hints. These hints don't automatically
|
|
// update all their descendant frames.
|
|
aMinChange = NS_SubtractHint(aMinChange, nsChangeHint_NonInherited_Hints);
|
|
|
|
// It would be nice if we could make stronger assertions here; they
|
|
// would let us simplify the ?: expressions below setting |content|
|
|
// and |pseudoContent| in sensible ways as well as making what
|
|
// |localContent|, |content|, and |pseudoContent| mean make more
|
|
// sense. However, we can't, because of frame trees like the one in
|
|
// https://bugzilla.mozilla.org/show_bug.cgi?id=472353#c14 . Once we
|
|
// fix bug 242277 we should be able to make this make more sense.
|
|
NS_ASSERTION(aFrame->GetContent() || !aParentContent ||
|
|
!aParentContent->GetParent(),
|
|
"frame must have content (unless at the top of the tree)");
|
|
// 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();
|
|
|
|
// XXXbz the nsIFrame constructor takes an nsStyleContext, so how
|
|
// could oldContext be null?
|
|
if (oldContext) {
|
|
oldContext->AddRef();
|
|
|
|
#ifdef ACCESSIBILITY
|
|
bool wasFrameVisible = nsIPresShell::IsAccessibilityActive() ?
|
|
oldContext->GetStyleVisibility()->IsVisible() : false;
|
|
#endif
|
|
|
|
nsIAtom* const pseudoTag = oldContext->GetPseudo();
|
|
const nsCSSPseudoElements::Type pseudoType = oldContext->GetPseudoType();
|
|
nsIContent* localContent = aFrame->GetContent();
|
|
// |content| is the node that we used for rule matching of
|
|
// normal elements (not pseudo-elements) and for which we generate
|
|
// framechange hints if we need them.
|
|
// XXXldb Why does it make sense to use aParentContent? (See
|
|
// comment above assertion at start of function.)
|
|
nsIContent* content = localContent ? localContent : aParentContent;
|
|
|
|
if (content && content->IsElement()) {
|
|
content->OwnerDoc()->FlushPendingLinkUpdates();
|
|
RestyleTracker::RestyleData restyleData;
|
|
if (aRestyleTracker.GetRestyleData(content->AsElement(), &restyleData)) {
|
|
if (NS_UpdateHint(aMinChange, restyleData.mChangeHint)) {
|
|
aChangeList->AppendChange(aFrame, content, restyleData.mChangeHint);
|
|
}
|
|
aRestyleHint = nsRestyleHint(aRestyleHint | restyleData.mRestyleHint);
|
|
}
|
|
}
|
|
|
|
nsRestyleHint childRestyleHint = aRestyleHint;
|
|
|
|
if (childRestyleHint == eRestyle_Self) {
|
|
childRestyleHint = nsRestyleHint(0);
|
|
}
|
|
|
|
nsStyleContext* parentContext;
|
|
nsIFrame* resolvedChild = nullptr;
|
|
// Get the frame providing the parent style context. If it is a
|
|
// child, then resolve the provider first.
|
|
nsIFrame* providerFrame = aFrame->GetParentStyleContextFrame();
|
|
bool isChild = providerFrame && providerFrame->GetParent() == aFrame;
|
|
if (!isChild) {
|
|
if (providerFrame)
|
|
parentContext = providerFrame->GetStyleContext();
|
|
else
|
|
parentContext = nullptr;
|
|
}
|
|
else {
|
|
MOZ_ASSERT(providerFrame->GetContent() == aFrame->GetContent(),
|
|
"Postcondition for GetParentStyleContextFrame() violated. "
|
|
"That means we need to add the current element to the "
|
|
"ancestor filter.");
|
|
|
|
// 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,
|
|
aParentContent, aChangeList,
|
|
aMinChange, aRestyleHint,
|
|
aRestyleTracker,
|
|
aDesiredA11yNotifications,
|
|
aVisibleKidsOfHiddenElement,
|
|
aTreeMatchContext);
|
|
|
|
// 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;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
{
|
|
// Check that our assumption that continuations of the same
|
|
// pseudo-type and with the same style context parent have the
|
|
// same style context is valid before the reresolution. (We need
|
|
// to check the pseudo-type and style context parent because of
|
|
// :first-letter and :first-line, where we create styled and
|
|
// unstyled letter/line frames distinguished by pseudo-type, and
|
|
// then need to distinguish their descendants based on having
|
|
// different parents.)
|
|
nsIFrame *nextContinuation = aFrame->GetNextContinuation();
|
|
if (nextContinuation) {
|
|
nsStyleContext *nextContinuationContext =
|
|
nextContinuation->GetStyleContext();
|
|
NS_ASSERTION(oldContext == nextContinuationContext ||
|
|
oldContext->GetPseudo() !=
|
|
nextContinuationContext->GetPseudo() ||
|
|
oldContext->GetParent() !=
|
|
nextContinuationContext->GetParent(),
|
|
"continuations should have the same style context");
|
|
}
|
|
// And assert the same thing for {ib} splits. See the comments in
|
|
// GetPrevContinuationWithPossiblySameStyle for an explanation of
|
|
// why we step two forward in the special sibling chain.
|
|
if ((aFrame->GetStateBits() & NS_FRAME_IS_SPECIAL) &&
|
|
!aFrame->GetPrevContinuation()) {
|
|
nsIFrame *nextIBSibling = static_cast<nsIFrame*>(
|
|
aFrame->Properties().Get(nsIFrame::IBSplitSpecialSibling()));
|
|
if (nextIBSibling) {
|
|
nextIBSibling = static_cast<nsIFrame*>(
|
|
nextIBSibling->Properties().Get(nsIFrame::IBSplitSpecialSibling()));
|
|
}
|
|
if (nextIBSibling) {
|
|
nsStyleContext *nextIBSiblingContext =
|
|
nextIBSibling->GetStyleContext();
|
|
NS_ASSERTION(oldContext == nextIBSiblingContext ||
|
|
oldContext->GetPseudo() !=
|
|
nextIBSiblingContext->GetPseudo() ||
|
|
oldContext->GetParent() !=
|
|
nextIBSiblingContext->GetParent(),
|
|
"continuations should have the same style context");
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// do primary context
|
|
nsRefPtr<nsStyleContext> newContext;
|
|
nsIFrame *prevContinuation =
|
|
GetPrevContinuationWithPossiblySameStyle(aFrame);
|
|
nsStyleContext *prevContinuationContext;
|
|
bool copyFromContinuation =
|
|
prevContinuation &&
|
|
(prevContinuationContext = prevContinuation->GetStyleContext())
|
|
->GetPseudo() == oldContext->GetPseudo() &&
|
|
prevContinuationContext->GetParent() == parentContext;
|
|
if (copyFromContinuation) {
|
|
// Just use the style context from the frame's previous
|
|
// continuation (see assertion about aFrame->GetNextContinuation()
|
|
// above, which we would have previously hit for aFrame's previous
|
|
// continuation).
|
|
newContext = prevContinuationContext;
|
|
}
|
|
else if (pseudoTag == nsCSSAnonBoxes::mozNonElement) {
|
|
NS_ASSERTION(localContent,
|
|
"non pseudo-element frame without content node");
|
|
newContext = styleSet->ResolveStyleForNonElement(parentContext);
|
|
}
|
|
else if (!aRestyleHint && !prevContinuation) {
|
|
// Unfortunately, if prevContinuation is non-null then we may have
|
|
// already stolen the restyle tracker entry for this element while
|
|
// processing prevContinuation. So we don't know whether aRestyleHint
|
|
// should really be 0 here or whether it should be eRestyle_Self. Be
|
|
// pessimistic and force an actual reresolve in that situation. The good
|
|
// news is that in the common case when prevContinuation is non-null we
|
|
// just used prevContinuationContext anyway and aren't reaching this code
|
|
// to start with.
|
|
newContext =
|
|
styleSet->ReparentStyleContext(oldContext, parentContext,
|
|
ElementForStyleContext(aParentContent,
|
|
aFrame,
|
|
pseudoType));
|
|
} else if (pseudoType == nsCSSPseudoElements::ePseudo_AnonBox) {
|
|
newContext = styleSet->ResolveAnonymousBoxStyle(pseudoTag,
|
|
parentContext);
|
|
}
|
|
else {
|
|
Element* element = ElementForStyleContext(aParentContent,
|
|
aFrame,
|
|
pseudoType);
|
|
if (pseudoTag) {
|
|
if (pseudoTag == nsCSSPseudoElements::before ||
|
|
pseudoTag == nsCSSPseudoElements::after) {
|
|
// XXX what other pseudos do we need to treat like this?
|
|
newContext = styleSet->ProbePseudoElementStyle(element,
|
|
pseudoType,
|
|
parentContext,
|
|
aTreeMatchContext);
|
|
if (!newContext) {
|
|
// This pseudo should no longer exist; gotta reframe
|
|
NS_UpdateHint(aMinChange, nsChangeHint_ReconstructFrame);
|
|
aChangeList->AppendChange(aFrame, element,
|
|
nsChangeHint_ReconstructFrame);
|
|
// We're reframing anyway; just keep the same context
|
|
newContext = oldContext;
|
|
}
|
|
} else {
|
|
// Don't expect XUL tree stuff here, since it needs a comparator and
|
|
// all.
|
|
NS_ASSERTION(pseudoType <
|
|
nsCSSPseudoElements::ePseudo_PseudoElementCount,
|
|
"Unexpected pseudo type");
|
|
newContext = styleSet->ResolvePseudoElementStyle(element,
|
|
pseudoType,
|
|
parentContext);
|
|
}
|
|
}
|
|
else {
|
|
NS_ASSERTION(localContent,
|
|
"non pseudo-element frame without content node");
|
|
newContext = styleSet->ResolveStyleFor(element, parentContext,
|
|
aTreeMatchContext);
|
|
}
|
|
}
|
|
|
|
NS_ASSERTION(newContext, "failed to get new style context");
|
|
if (newContext) {
|
|
if (!parentContext) {
|
|
if (oldContext->GetRuleNode() == newContext->GetRuleNode() &&
|
|
oldContext->IsLinkContext() == newContext->IsLinkContext() &&
|
|
oldContext->RelevantLinkVisited() ==
|
|
newContext->RelevantLinkVisited()) {
|
|
// 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 = oldContext;
|
|
}
|
|
}
|
|
|
|
if (newContext != oldContext) {
|
|
if (!copyFromContinuation) {
|
|
TryStartingTransition(aPresContext, aFrame->GetContent(),
|
|
oldContext, &newContext);
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
oldContext->Release();
|
|
}
|
|
else {
|
|
NS_ERROR("resolve style context failed");
|
|
newContext = oldContext; // new context failed, recover...
|
|
}
|
|
|
|
// do additional contexts
|
|
// XXXbz might be able to avoid selector matching here in some
|
|
// cases; won't worry about it for now.
|
|
int32_t contextIndex = -1;
|
|
while (1 == 1) {
|
|
nsStyleContext* oldExtraContext = nullptr;
|
|
oldExtraContext = aFrame->GetAdditionalStyleContext(++contextIndex);
|
|
if (oldExtraContext) {
|
|
nsRefPtr<nsStyleContext> newExtraContext;
|
|
nsIAtom* const extraPseudoTag = oldExtraContext->GetPseudo();
|
|
const nsCSSPseudoElements::Type extraPseudoType =
|
|
oldExtraContext->GetPseudoType();
|
|
NS_ASSERTION(extraPseudoTag &&
|
|
extraPseudoTag != nsCSSAnonBoxes::mozNonElement,
|
|
"extra style context is not pseudo element");
|
|
if (extraPseudoType == nsCSSPseudoElements::ePseudo_AnonBox) {
|
|
newExtraContext = styleSet->ResolveAnonymousBoxStyle(extraPseudoTag,
|
|
newContext);
|
|
}
|
|
else {
|
|
// Don't expect XUL tree stuff here, since it needs a comparator and
|
|
// all.
|
|
NS_ASSERTION(extraPseudoType <
|
|
nsCSSPseudoElements::ePseudo_PseudoElementCount,
|
|
"Unexpected type");
|
|
newExtraContext = styleSet->ResolvePseudoElementStyle(content->AsElement(),
|
|
extraPseudoType,
|
|
newContext);
|
|
}
|
|
if (newExtraContext) {
|
|
if (oldExtraContext != newExtraContext) {
|
|
aMinChange = CaptureChange(oldExtraContext, newExtraContext,
|
|
aFrame, content, aChangeList,
|
|
aMinChange, assumeDifferenceHint);
|
|
if (!(aMinChange & nsChangeHint_ReconstructFrame)) {
|
|
aFrame->SetAdditionalStyleContext(contextIndex, newExtraContext);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
// now look for undisplayed child content and pseudos
|
|
|
|
// When the root element is display:none, we still construct *some*
|
|
// frames that have the root element as their mContent, down to the
|
|
// DocElementContainingBlock.
|
|
bool checkUndisplayed;
|
|
nsIContent *undisplayedParent;
|
|
if (pseudoTag) {
|
|
checkUndisplayed = aFrame == mPresShell->FrameConstructor()->
|
|
GetDocElementContainingBlock();
|
|
undisplayedParent = nullptr;
|
|
} else {
|
|
checkUndisplayed = !!localContent;
|
|
undisplayedParent = localContent;
|
|
}
|
|
if (checkUndisplayed && mUndisplayedMap) {
|
|
UndisplayedNode* undisplayed =
|
|
mUndisplayedMap->GetFirstNode(undisplayedParent);
|
|
for (AncestorFilter::AutoAncestorPusher
|
|
pushAncestor(undisplayed, aTreeMatchContext.mAncestorFilter,
|
|
undisplayedParent ? undisplayedParent->AsElement()
|
|
: nullptr);
|
|
undisplayed; undisplayed = undisplayed->mNext) {
|
|
NS_ASSERTION(undisplayedParent ||
|
|
undisplayed->mContent ==
|
|
mPresShell->GetDocument()->GetRootElement(),
|
|
"undisplayed node child of null must be root");
|
|
NS_ASSERTION(!undisplayed->mStyle->GetPseudo(),
|
|
"Shouldn't have random pseudo style contexts in the "
|
|
"undisplayed map");
|
|
nsRestyleHint thisChildHint = childRestyleHint;
|
|
RestyleTracker::RestyleData undisplayedRestyleData;
|
|
if (aRestyleTracker.GetRestyleData(undisplayed->mContent->AsElement(),
|
|
&undisplayedRestyleData)) {
|
|
thisChildHint =
|
|
nsRestyleHint(thisChildHint | undisplayedRestyleData.mRestyleHint);
|
|
}
|
|
nsRefPtr<nsStyleContext> undisplayedContext;
|
|
if (thisChildHint) {
|
|
undisplayedContext =
|
|
styleSet->ResolveStyleFor(undisplayed->mContent->AsElement(),
|
|
newContext,
|
|
aTreeMatchContext);
|
|
} else {
|
|
undisplayedContext =
|
|
styleSet->ReparentStyleContext(undisplayed->mStyle, newContext,
|
|
undisplayed->mContent->AsElement());
|
|
}
|
|
if (undisplayedContext) {
|
|
const nsStyleDisplay* display = undisplayedContext->GetStyleDisplay();
|
|
if (display->mDisplay != NS_STYLE_DISPLAY_NONE) {
|
|
NS_ASSERTION(undisplayed->mContent,
|
|
"Must have undisplayed content");
|
|
aChangeList->AppendChange(nullptr, undisplayed->mContent,
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Check whether we might need to create a new ::before frame.
|
|
// There's no need to do this if we're planning to reframe already
|
|
// or if we're not forcing restyles on kids.
|
|
if (!(aMinChange & nsChangeHint_ReconstructFrame) &&
|
|
childRestyleHint) {
|
|
// Make sure not to do this for pseudo-frames or frames that
|
|
// can't have generated content.
|
|
if (!pseudoTag &&
|
|
((aFrame->GetStateBits() & NS_FRAME_MAY_HAVE_GENERATED_CONTENT) ||
|
|
// Our content insertion frame might have gotten flagged
|
|
(aFrame->GetContentInsertionFrame()->GetStateBits() &
|
|
NS_FRAME_MAY_HAVE_GENERATED_CONTENT))) {
|
|
// 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::ePseudo_before,
|
|
aPresContext)) {
|
|
// Have to create the new :before frame
|
|
NS_UpdateHint(aMinChange, nsChangeHint_ReconstructFrame);
|
|
aChangeList->AppendChange(aFrame, content,
|
|
nsChangeHint_ReconstructFrame);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Check whether we might need to create a new ::after frame.
|
|
// There's no need to do this if we're planning to reframe already
|
|
// or if we're not forcing restyles on kids.
|
|
if (!(aMinChange & nsChangeHint_ReconstructFrame) &&
|
|
childRestyleHint) {
|
|
// Make sure not to do this for pseudo-frames or frames that
|
|
// can't have generated content.
|
|
if (!pseudoTag &&
|
|
((aFrame->GetStateBits() & NS_FRAME_MAY_HAVE_GENERATED_CONTENT) ||
|
|
// Our content insertion frame might have gotten flagged
|
|
(aFrame->GetContentInsertionFrame()->GetStateBits() &
|
|
NS_FRAME_MAY_HAVE_GENERATED_CONTENT))) {
|
|
// 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::ePseudo_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)) {
|
|
DesiredA11yNotifications kidsDesiredA11yNotification =
|
|
aDesiredA11yNotifications;
|
|
#ifdef ACCESSIBILITY
|
|
A11yNotificationType ourA11yNotification = eDontNotify;
|
|
// Notify a11y for primary frame only if it's a root frame of visibility
|
|
// changes or its parent frame was hidden while it stays visible and
|
|
// it is not inside a {ib} split or is the first frame of {ib} split.
|
|
if (nsIPresShell::IsAccessibilityActive() &&
|
|
!aFrame->GetPrevContinuation() &&
|
|
!nsLayoutUtils::FrameIsNonFirstInIBSplit(aFrame)) {
|
|
if (aDesiredA11yNotifications == eSendAllNotifications) {
|
|
bool isFrameVisible = newContext->GetStyleVisibility()->IsVisible();
|
|
if (isFrameVisible != wasFrameVisible) {
|
|
if (isFrameVisible) {
|
|
// Notify a11y the element (perhaps with its children) was shown.
|
|
// We don't fall into this case if this element gets or stays shown
|
|
// while its parent becomes hidden.
|
|
kidsDesiredA11yNotification = eSkipNotifications;
|
|
ourA11yNotification = eNotifyShown;
|
|
} else {
|
|
// The element is being hidden; its children may stay visible, or
|
|
// become visible after being hidden previously. If we'll find
|
|
// visible children then we should notify a11y about that as if
|
|
// they were inserted into tree. Notify a11y this element was
|
|
// hidden.
|
|
kidsDesiredA11yNotification = eNotifyIfShown;
|
|
ourA11yNotification = eNotifyHidden;
|
|
}
|
|
}
|
|
} else if (aDesiredA11yNotifications == eNotifyIfShown &&
|
|
newContext->GetStyleVisibility()->IsVisible()) {
|
|
// Notify a11y that element stayed visible while its parent was
|
|
// hidden.
|
|
aVisibleKidsOfHiddenElement.AppendElement(aFrame->GetContent());
|
|
kidsDesiredA11yNotification = eSkipNotifications;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// 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
|
|
nsIFrame::ChildListIterator lists(aFrame);
|
|
for (AncestorFilter::AutoAncestorPusher
|
|
pushAncestor(!lists.IsDone(),
|
|
aTreeMatchContext.mAncestorFilter,
|
|
content && content->IsElement() ? content->AsElement()
|
|
: nullptr);
|
|
!lists.IsDone(); lists.Next()) {
|
|
nsFrameList::Enumerator childFrames(lists.CurrentList());
|
|
for (; !childFrames.AtEnd(); childFrames.Next()) {
|
|
nsIFrame* child = childFrames.get();
|
|
if (!(child->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) {
|
|
// only do frames that are in flow
|
|
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 reflowed 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.
|
|
do {
|
|
ReResolveStyleContext(aPresContext, outOfFlowFrame,
|
|
content, aChangeList,
|
|
NS_SubtractHint(aMinChange,
|
|
nsChangeHint_ReflowFrame),
|
|
childRestyleHint,
|
|
aRestyleTracker,
|
|
kidsDesiredA11yNotification,
|
|
aVisibleKidsOfHiddenElement,
|
|
aTreeMatchContext);
|
|
} while ((outOfFlowFrame = outOfFlowFrame->GetNextContinuation()));
|
|
|
|
// reresolve placeholder's context under the same parent
|
|
// as the out-of-flow frame
|
|
ReResolveStyleContext(aPresContext, child, content,
|
|
aChangeList, aMinChange,
|
|
childRestyleHint,
|
|
aRestyleTracker,
|
|
kidsDesiredA11yNotification,
|
|
aVisibleKidsOfHiddenElement,
|
|
aTreeMatchContext);
|
|
}
|
|
else { // regular child frame
|
|
if (child != resolvedChild) {
|
|
ReResolveStyleContext(aPresContext, child, content,
|
|
aChangeList, aMinChange,
|
|
childRestyleHint,
|
|
aRestyleTracker,
|
|
kidsDesiredA11yNotification,
|
|
aVisibleKidsOfHiddenElement,
|
|
aTreeMatchContext);
|
|
} else {
|
|
NOISY_TRACE_FRAME("child frame already resolved as descendant, skipping",aFrame);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// XXX need to do overflow frames???
|
|
|
|
#ifdef ACCESSIBILITY
|
|
// Send notifications about visibility changes.
|
|
if (ourA11yNotification == eNotifyShown) {
|
|
nsAccessibilityService* accService = nsIPresShell::AccService();
|
|
if (accService) {
|
|
nsIPresShell* presShell = aFrame->PresContext()->GetPresShell();
|
|
nsIContent* content = aFrame->GetContent();
|
|
|
|
accService->ContentRangeInserted(presShell, content->GetParent(),
|
|
content,
|
|
content->GetNextSibling());
|
|
}
|
|
} else if (ourA11yNotification == eNotifyHidden) {
|
|
nsAccessibilityService* accService = nsIPresShell::AccService();
|
|
if (accService) {
|
|
nsIPresShell* presShell = aFrame->PresContext()->GetPresShell();
|
|
nsIContent* content = aFrame->GetContent();
|
|
accService->ContentRemoved(presShell, content->GetParent(), content);
|
|
|
|
// Process children staying shown.
|
|
uint32_t visibleContentCount = aVisibleKidsOfHiddenElement.Length();
|
|
for (uint32_t idx = 0; idx < visibleContentCount; idx++) {
|
|
nsIContent* content = aVisibleKidsOfHiddenElement[idx];
|
|
accService->ContentRangeInserted(presShell, content->GetParent(),
|
|
content, content->GetNextSibling());
|
|
}
|
|
aVisibleKidsOfHiddenElement.Clear();
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
return aMinChange;
|
|
}
|
|
|
|
void
|
|
nsFrameManager::ComputeStyleChangeFor(nsIFrame *aFrame,
|
|
nsStyleChangeList *aChangeList,
|
|
nsChangeHint aMinChange,
|
|
RestyleTracker& aRestyleTracker,
|
|
bool aRestyleDescendants)
|
|
{
|
|
nsIContent *content = aFrame->GetContent();
|
|
if (aMinChange) {
|
|
aChangeList->AppendChange(aFrame, content, 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.
|
|
|
|
FramePropertyTable *propTable = GetPresContext()->PropertyTable();
|
|
|
|
TreeMatchContext treeMatchContext(true,
|
|
nsRuleWalker::eRelevantLinkUnvisited,
|
|
mPresShell->GetDocument());
|
|
nsIContent *parent = content ? content->GetParent() : nullptr;
|
|
Element *parentElement =
|
|
parent && parent->IsElement() ? parent->AsElement() : nullptr;
|
|
treeMatchContext.mAncestorFilter.Init(parentElement);
|
|
nsTArray<nsIContent*> visibleKidsOfHiddenElement;
|
|
do {
|
|
// Outer loop over special siblings
|
|
do {
|
|
// Inner loop over next-in-flows of the current frame
|
|
nsChangeHint frameChange =
|
|
ReResolveStyleContext(GetPresContext(), frame, nullptr,
|
|
aChangeList, topLevelChange,
|
|
aRestyleDescendants ?
|
|
eRestyle_Subtree : eRestyle_Self,
|
|
aRestyleTracker,
|
|
eSendAllNotifications,
|
|
visibleKidsOfHiddenElement,
|
|
treeMatchContext);
|
|
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->Get(frame2, nsIFrame::IBSplitSpecialSibling()));
|
|
frame = frame2;
|
|
} while (frame2);
|
|
}
|
|
|
|
// 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 = do_QueryFrame(aFrame);
|
|
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() : nullptr;
|
|
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(nullptr != aFrame && nullptr != aState, "null parameters passed in");
|
|
|
|
CaptureFrameStateFor(aFrame, aState);
|
|
|
|
// Now capture state recursively for the frame hierarchy rooted at aFrame
|
|
nsIFrame::ChildListIterator lists(aFrame);
|
|
for (; !lists.IsDone(); lists.Next()) {
|
|
nsFrameList::Enumerator childFrames(lists.CurrentList());
|
|
for (; !childFrames.AtEnd(); childFrames.Next()) {
|
|
nsIFrame* child = childFrames.get();
|
|
if (child->GetStateBits() & NS_FRAME_OUT_OF_FLOW) {
|
|
// We'll pick it up when we get to its placeholder
|
|
continue;
|
|
}
|
|
// Make sure to walk through placeholders as needed, so that we
|
|
// save state for out-of-flows which may not be our descendants
|
|
// themselves but whose placeholders are our descendants.
|
|
CaptureFrameState(nsPlaceholderFrame::GetRealFrameFor(child), aState);
|
|
}
|
|
}
|
|
}
|
|
|
|
// 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 restore state for stateful frames
|
|
nsIStatefulFrame* statefulFrame = do_QueryFrame(aFrame);
|
|
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(nullptr != aFrame && nullptr != aState, "null parameters passed in");
|
|
|
|
RestoreFrameStateFor(aFrame, aState);
|
|
|
|
// Now restore state recursively for the frame hierarchy rooted at aFrame
|
|
nsIFrame::ChildListIterator lists(aFrame);
|
|
for (; !lists.IsDone(); lists.Next()) {
|
|
nsFrameList::Enumerator childFrames(lists.CurrentList());
|
|
for (; !childFrames.AtEnd(); childFrames.Next()) {
|
|
RestoreFrameState(childFrames.get(), aState);
|
|
}
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
static PLHashNumber
|
|
HashKey(void* key)
|
|
{
|
|
return NS_PTR_TO_INT32(key);
|
|
}
|
|
|
|
static int
|
|
CompareKeys(void* key1, void* key2)
|
|
{
|
|
return key1 == key2;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
nsFrameManagerBase::UndisplayedMap::UndisplayedMap(uint32_t aNumBuckets)
|
|
{
|
|
MOZ_COUNT_CTOR(nsFrameManagerBase::UndisplayedMap);
|
|
mTable = PL_NewHashTable(aNumBuckets, (PLHashFunction)HashKey,
|
|
(PLHashComparator)CompareKeys,
|
|
(PLHashComparator)nullptr,
|
|
nullptr, nullptr);
|
|
mLastLookup = nullptr;
|
|
}
|
|
|
|
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 nullptr;
|
|
}
|
|
|
|
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 = nullptr; // 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);
|
|
|
|
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 = nullptr;
|
|
}
|
|
else {
|
|
PL_HashTableRawRemove(mTable, entry, *entry);
|
|
mLastLookup = nullptr; // 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 = nullptr;
|
|
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 = nullptr; // hashtable may have shifted bucket out from under us
|
|
}
|
|
}
|
|
|
|
static int
|
|
RemoveUndisplayedEntry(PLHashEntry* he, int 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 = nullptr;
|
|
PL_HashTableEnumerateEntries(mTable, RemoveUndisplayedEntry, 0);
|
|
}
|
|
|
|
uint32_t nsFrameManagerBase::sGlobalGenerationNumber;
|