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https://github.com/mozilla/gecko-dev.git
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568 lines
16 KiB
C++
568 lines
16 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 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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/*
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* style sheet and style rule processor representing data from presentational
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* HTML attributes
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*/
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#include "nsHTMLStyleSheet.h"
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#include "nsMappedAttributes.h"
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#include "nsGkAtoms.h"
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#include "nsPresContext.h"
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#include "nsEventStates.h"
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#include "nsIDocument.h"
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#include "nsIPresShell.h"
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#include "nsStyleConsts.h"
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#include "nsRuleWalker.h"
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#include "nsRuleData.h"
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#include "nsError.h"
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#include "nsRuleProcessorData.h"
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#include "nsCSSRuleProcessor.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/dom/Element.h"
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#include "nsCSSFrameConstructor.h"
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#include "nsHashKeys.h"
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#include "RestyleManager.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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NS_IMPL_ISUPPORTS1(nsHTMLStyleSheet::HTMLColorRule, nsIStyleRule)
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/* virtual */ void
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nsHTMLStyleSheet::HTMLColorRule::MapRuleInfoInto(nsRuleData* aRuleData)
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{
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if (aRuleData->mSIDs & NS_STYLE_INHERIT_BIT(Color)) {
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nsCSSValue* color = aRuleData->ValueForColor();
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if (color->GetUnit() == eCSSUnit_Null &&
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aRuleData->mPresContext->UseDocumentColors())
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color->SetColorValue(mColor);
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}
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}
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#ifdef DEBUG
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/* virtual */ void
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nsHTMLStyleSheet::HTMLColorRule::List(FILE* out, int32_t aIndent) const
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{
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for (int32_t index = aIndent; --index >= 0; ) fputs(" ", out);
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fputs("[html color rule] {}\n", out);
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}
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#endif
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NS_IMPL_ISUPPORTS1(nsHTMLStyleSheet::GenericTableRule, nsIStyleRule)
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#ifdef DEBUG
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/* virtual */ void
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nsHTMLStyleSheet::GenericTableRule::List(FILE* out, int32_t aIndent) const
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{
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for (int32_t index = aIndent; --index >= 0; ) fputs(" ", out);
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fputs("[generic table rule] {}\n", out);
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}
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#endif
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/* virtual */ void
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nsHTMLStyleSheet::TableTHRule::MapRuleInfoInto(nsRuleData* aRuleData)
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{
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if (aRuleData->mSIDs & NS_STYLE_INHERIT_BIT(Text)) {
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nsCSSValue* textAlign = aRuleData->ValueForTextAlign();
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if (textAlign->GetUnit() == eCSSUnit_Null) {
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textAlign->SetIntValue(NS_STYLE_TEXT_ALIGN_MOZ_CENTER_OR_INHERIT,
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eCSSUnit_Enumerated);
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}
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}
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}
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/* virtual */ void
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nsHTMLStyleSheet::TableQuirkColorRule::MapRuleInfoInto(nsRuleData* aRuleData)
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{
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if (aRuleData->mSIDs & NS_STYLE_INHERIT_BIT(Color)) {
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nsCSSValue* color = aRuleData->ValueForColor();
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// We do not check UseDocumentColors() here, because we want to
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// use the body color no matter what.
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if (color->GetUnit() == eCSSUnit_Null)
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color->SetIntValue(NS_STYLE_COLOR_INHERIT_FROM_BODY,
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eCSSUnit_Enumerated);
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}
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}
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NS_IMPL_ISUPPORTS1(nsHTMLStyleSheet::LangRule, nsIStyleRule)
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/* virtual */ void
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nsHTMLStyleSheet::LangRule::MapRuleInfoInto(nsRuleData* aRuleData)
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{
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if (aRuleData->mSIDs & NS_STYLE_INHERIT_BIT(Font)) {
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nsCSSValue* lang = aRuleData->ValueForLang();
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if (lang->GetUnit() == eCSSUnit_Null) {
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lang->SetStringValue(mLang, eCSSUnit_Ident);
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}
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}
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}
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#ifdef DEBUG
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/* virtual */ void
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nsHTMLStyleSheet::LangRule::List(FILE* out, int32_t aIndent) const
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{
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for (int32_t index = aIndent; --index >= 0; ) fputs(" ", out);
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fputs("[lang rule] { language: \"", out);
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fputs(NS_ConvertUTF16toUTF8(mLang).get(), out);
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fputs("\" }\n", out);
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}
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#endif
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// -----------------------------------------------------------
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struct MappedAttrTableEntry : public PLDHashEntryHdr {
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nsMappedAttributes *mAttributes;
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};
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static PLDHashNumber
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MappedAttrTable_HashKey(PLDHashTable *table, const void *key)
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{
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nsMappedAttributes *attributes =
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static_cast<nsMappedAttributes*>(const_cast<void*>(key));
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return attributes->HashValue();
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}
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static void
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MappedAttrTable_ClearEntry(PLDHashTable *table, PLDHashEntryHdr *hdr)
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{
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MappedAttrTableEntry *entry = static_cast<MappedAttrTableEntry*>(hdr);
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entry->mAttributes->DropStyleSheetReference();
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memset(entry, 0, sizeof(MappedAttrTableEntry));
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}
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static bool
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MappedAttrTable_MatchEntry(PLDHashTable *table, const PLDHashEntryHdr *hdr,
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const void *key)
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{
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nsMappedAttributes *attributes =
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static_cast<nsMappedAttributes*>(const_cast<void*>(key));
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const MappedAttrTableEntry *entry =
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static_cast<const MappedAttrTableEntry*>(hdr);
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return attributes->Equals(entry->mAttributes);
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}
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static PLDHashTableOps MappedAttrTable_Ops = {
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PL_DHashAllocTable,
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PL_DHashFreeTable,
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MappedAttrTable_HashKey,
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MappedAttrTable_MatchEntry,
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PL_DHashMoveEntryStub,
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MappedAttrTable_ClearEntry,
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PL_DHashFinalizeStub,
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nullptr
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};
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// -----------------------------------------------------------
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struct LangRuleTableEntry : public PLDHashEntryHdr {
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nsRefPtr<nsHTMLStyleSheet::LangRule> mRule;
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};
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static PLDHashNumber
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LangRuleTable_HashKey(PLDHashTable *table, const void *key)
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{
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const nsString *lang = static_cast<const nsString*>(key);
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return HashString(*lang);
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}
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static void
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LangRuleTable_ClearEntry(PLDHashTable *table, PLDHashEntryHdr *hdr)
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{
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LangRuleTableEntry *entry = static_cast<LangRuleTableEntry*>(hdr);
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entry->~LangRuleTableEntry();
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memset(entry, 0, sizeof(LangRuleTableEntry));
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}
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static bool
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LangRuleTable_MatchEntry(PLDHashTable *table, const PLDHashEntryHdr *hdr,
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const void *key)
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{
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const nsString *lang = static_cast<const nsString*>(key);
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const LangRuleTableEntry *entry = static_cast<const LangRuleTableEntry*>(hdr);
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return entry->mRule->mLang == *lang;
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}
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static bool
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LangRuleTable_InitEntry(PLDHashTable *table, PLDHashEntryHdr *hdr,
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const void *key)
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{
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const nsString *lang = static_cast<const nsString*>(key);
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LangRuleTableEntry *entry = new (hdr) LangRuleTableEntry();
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// Create the unique rule for this language
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entry->mRule = new nsHTMLStyleSheet::LangRule(*lang);
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return true;
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}
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static PLDHashTableOps LangRuleTable_Ops = {
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PL_DHashAllocTable,
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PL_DHashFreeTable,
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LangRuleTable_HashKey,
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LangRuleTable_MatchEntry,
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PL_DHashMoveEntryStub,
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LangRuleTable_ClearEntry,
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PL_DHashFinalizeStub,
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LangRuleTable_InitEntry
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};
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// -----------------------------------------------------------
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nsHTMLStyleSheet::nsHTMLStyleSheet(nsIDocument* aDocument)
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: mDocument(aDocument)
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, mTableQuirkColorRule(new TableQuirkColorRule())
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, mTableTHRule(new TableTHRule())
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{
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MOZ_ASSERT(aDocument);
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mMappedAttrTable.ops = nullptr;
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mLangRuleTable.ops = nullptr;
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}
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nsHTMLStyleSheet::~nsHTMLStyleSheet()
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{
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if (mLangRuleTable.ops)
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PL_DHashTableFinish(&mLangRuleTable);
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if (mMappedAttrTable.ops)
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PL_DHashTableFinish(&mMappedAttrTable);
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}
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NS_IMPL_ISUPPORTS1(nsHTMLStyleSheet, nsIStyleRuleProcessor)
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/* virtual */ void
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nsHTMLStyleSheet::RulesMatching(ElementRuleProcessorData* aData)
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{
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nsRuleWalker *ruleWalker = aData->mRuleWalker;
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if (aData->mElement->IsHTML() && !ruleWalker->AuthorStyleDisabled()) {
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nsIAtom* tag = aData->mElement->Tag();
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// if we have anchor colors, check if this is an anchor with an href
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if (tag == nsGkAtoms::a) {
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if (mLinkRule || mVisitedRule || mActiveRule) {
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nsEventStates state = nsCSSRuleProcessor::GetContentStateForVisitedHandling(
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aData->mElement,
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aData->mTreeMatchContext,
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aData->mTreeMatchContext.VisitedHandling(),
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// If the node being matched is a link,
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// it's the relevant link.
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nsCSSRuleProcessor::IsLink(aData->mElement));
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if (mLinkRule && state.HasState(NS_EVENT_STATE_UNVISITED)) {
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ruleWalker->Forward(mLinkRule);
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aData->mTreeMatchContext.SetHaveRelevantLink();
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}
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else if (mVisitedRule && state.HasState(NS_EVENT_STATE_VISITED)) {
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ruleWalker->Forward(mVisitedRule);
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aData->mTreeMatchContext.SetHaveRelevantLink();
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}
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// No need to add to the active rule if it's not a link
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if (mActiveRule && nsCSSRuleProcessor::IsLink(aData->mElement) &&
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state.HasState(NS_EVENT_STATE_ACTIVE)) {
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ruleWalker->Forward(mActiveRule);
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}
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} // end link/visited/active rules
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} // end A tag
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// add the rule to handle text-align for a <th>
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else if (tag == nsGkAtoms::th) {
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ruleWalker->Forward(mTableTHRule);
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}
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else if (tag == nsGkAtoms::table) {
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if (aData->mTreeMatchContext.mCompatMode == eCompatibility_NavQuirks) {
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ruleWalker->Forward(mTableQuirkColorRule);
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}
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}
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} // end html element
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// just get the style rules from the content. For SVG we do this even if
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// author style is disabled, because SVG presentational hints aren't
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// considered style.
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if (!ruleWalker->AuthorStyleDisabled() || aData->mElement->IsSVG()) {
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aData->mElement->WalkContentStyleRules(ruleWalker);
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}
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// http://www.whatwg.org/specs/web-apps/current-work/multipage/elements.html#language
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// says that the xml:lang attribute overrides HTML's lang attribute,
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// so we need to do this after WalkContentStyleRules.
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nsString lang;
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if (aData->mElement->GetAttr(kNameSpaceID_XML, nsGkAtoms::lang, lang)) {
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ruleWalker->Forward(LangRuleFor(lang));
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}
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}
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// Test if style is dependent on content state
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/* virtual */ nsRestyleHint
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nsHTMLStyleSheet::HasStateDependentStyle(StateRuleProcessorData* aData)
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{
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if (aData->mElement->IsHTML(nsGkAtoms::a) &&
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nsCSSRuleProcessor::IsLink(aData->mElement) &&
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((mActiveRule && aData->mStateMask.HasState(NS_EVENT_STATE_ACTIVE)) ||
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(mLinkRule && aData->mStateMask.HasState(NS_EVENT_STATE_VISITED)) ||
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(mVisitedRule && aData->mStateMask.HasState(NS_EVENT_STATE_VISITED)))) {
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return eRestyle_Self;
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}
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return nsRestyleHint(0);
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}
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/* virtual */ bool
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nsHTMLStyleSheet::HasDocumentStateDependentStyle(StateRuleProcessorData* aData)
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{
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return false;
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}
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/* virtual */ nsRestyleHint
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nsHTMLStyleSheet::HasAttributeDependentStyle(AttributeRuleProcessorData* aData)
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{
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// Do nothing on before-change checks
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if (!aData->mAttrHasChanged) {
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return nsRestyleHint(0);
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}
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// Note: no need to worry about whether some states changed with this
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// attribute here, because we handle that under HasStateDependentStyle() as
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// needed.
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// Result is true for |href| changes on HTML links if we have link rules.
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Element *element = aData->mElement;
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if (aData->mAttribute == nsGkAtoms::href &&
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(mLinkRule || mVisitedRule || mActiveRule) &&
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element->IsHTML(nsGkAtoms::a)) {
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return eRestyle_Self;
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}
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// Don't worry about the mDocumentColorRule since it only applies
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// to descendants of body, when we're already reresolving.
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// Handle the content style rules.
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if (element->IsAttributeMapped(aData->mAttribute)) {
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// cellpadding on tables is special and requires reresolving all
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// the cells in the table
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if (aData->mAttribute == nsGkAtoms::cellpadding &&
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element->IsHTML(nsGkAtoms::table)) {
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return eRestyle_Subtree;
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}
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return eRestyle_Self;
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}
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return nsRestyleHint(0);
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}
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/* virtual */ bool
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nsHTMLStyleSheet::MediumFeaturesChanged(nsPresContext* aPresContext)
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{
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return false;
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}
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/* virtual */ size_t
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nsHTMLStyleSheet::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
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{
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return 0; // nsHTMLStyleSheets are charged to the DOM, not layout
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}
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/* virtual */ size_t
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nsHTMLStyleSheet::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
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{
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return 0; // nsHTMLStyleSheets are charged to the DOM, not layout
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}
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/* virtual */ void
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nsHTMLStyleSheet::RulesMatching(PseudoElementRuleProcessorData* aData)
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{
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}
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/* virtual */ void
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nsHTMLStyleSheet::RulesMatching(AnonBoxRuleProcessorData* aData)
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{
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}
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#ifdef MOZ_XUL
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/* virtual */ void
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nsHTMLStyleSheet::RulesMatching(XULTreeRuleProcessorData* aData)
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{
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}
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#endif
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void
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nsHTMLStyleSheet::SetOwningDocument(nsIDocument* aDocument)
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{
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mDocument = aDocument; // not refcounted
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}
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void
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nsHTMLStyleSheet::Reset()
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{
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mLinkRule = nullptr;
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mVisitedRule = nullptr;
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mActiveRule = nullptr;
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if (mLangRuleTable.ops) {
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PL_DHashTableFinish(&mLangRuleTable);
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mLangRuleTable.ops = nullptr;
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}
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if (mMappedAttrTable.ops) {
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PL_DHashTableFinish(&mMappedAttrTable);
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mMappedAttrTable.ops = nullptr;
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}
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}
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nsresult
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nsHTMLStyleSheet::ImplLinkColorSetter(nsRefPtr<HTMLColorRule>& aRule, nscolor aColor)
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{
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if (aRule && aRule->mColor == aColor) {
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return NS_OK;
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}
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aRule = new HTMLColorRule();
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if (!aRule)
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return NS_ERROR_OUT_OF_MEMORY;
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aRule->mColor = aColor;
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// Now make sure we restyle any links that might need it. This
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// shouldn't happen often, so just rebuilding everything is ok.
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if (mDocument && mDocument->GetShell()) {
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Element* root = mDocument->GetRootElement();
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if (root) {
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mDocument->GetShell()->GetPresContext()->RestyleManager()->
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PostRestyleEvent(root, eRestyle_Subtree, NS_STYLE_HINT_NONE);
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}
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}
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return NS_OK;
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}
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nsresult
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nsHTMLStyleSheet::SetLinkColor(nscolor aColor)
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{
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return ImplLinkColorSetter(mLinkRule, aColor);
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}
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nsresult
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nsHTMLStyleSheet::SetActiveLinkColor(nscolor aColor)
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{
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return ImplLinkColorSetter(mActiveRule, aColor);
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}
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nsresult
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nsHTMLStyleSheet::SetVisitedLinkColor(nscolor aColor)
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{
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return ImplLinkColorSetter(mVisitedRule, aColor);
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}
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already_AddRefed<nsMappedAttributes>
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nsHTMLStyleSheet::UniqueMappedAttributes(nsMappedAttributes* aMapped)
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{
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if (!mMappedAttrTable.ops) {
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bool res = PL_DHashTableInit(&mMappedAttrTable, &MappedAttrTable_Ops,
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nullptr, sizeof(MappedAttrTableEntry), 16);
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if (!res) {
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mMappedAttrTable.ops = nullptr;
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return nullptr;
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}
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}
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MappedAttrTableEntry *entry = static_cast<MappedAttrTableEntry*>
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(PL_DHashTableOperate(&mMappedAttrTable, aMapped, PL_DHASH_ADD));
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if (!entry)
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return nullptr;
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if (!entry->mAttributes) {
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// We added a new entry to the hashtable, so we have a new unique set.
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entry->mAttributes = aMapped;
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}
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nsRefPtr<nsMappedAttributes> ret = entry->mAttributes;
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return ret.forget();
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}
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void
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nsHTMLStyleSheet::DropMappedAttributes(nsMappedAttributes* aMapped)
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{
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NS_ENSURE_TRUE_VOID(aMapped);
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NS_ASSERTION(mMappedAttrTable.ops, "table uninitialized");
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#ifdef DEBUG
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uint32_t entryCount = mMappedAttrTable.entryCount - 1;
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#endif
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PL_DHashTableOperate(&mMappedAttrTable, aMapped, PL_DHASH_REMOVE);
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NS_ASSERTION(entryCount == mMappedAttrTable.entryCount, "not removed");
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}
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nsIStyleRule*
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nsHTMLStyleSheet::LangRuleFor(const nsString& aLanguage)
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{
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if (!mLangRuleTable.ops) {
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bool res = PL_DHashTableInit(&mLangRuleTable, &LangRuleTable_Ops,
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nullptr, sizeof(LangRuleTableEntry), 16);
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if (!res) {
|
|
NS_ASSERTION(false, "out of memory");
|
|
mLangRuleTable.ops = nullptr;
|
|
return nullptr;
|
|
}
|
|
}
|
|
LangRuleTableEntry *entry = static_cast<LangRuleTableEntry*>
|
|
(PL_DHashTableOperate(&mLangRuleTable, &aLanguage, PL_DHASH_ADD));
|
|
if (!entry) {
|
|
NS_ASSERTION(false, "out of memory");
|
|
return nullptr;
|
|
}
|
|
return entry->mRule;
|
|
}
|
|
|
|
static size_t
|
|
SizeOfAttributesEntryExcludingThis(PLDHashEntryHdr* aEntry,
|
|
MallocSizeOf aMallocSizeOf,
|
|
void* aArg)
|
|
{
|
|
NS_PRECONDITION(aEntry, "The entry should not be null!");
|
|
|
|
MappedAttrTableEntry* entry = static_cast<MappedAttrTableEntry*>(aEntry);
|
|
NS_ASSERTION(entry->mAttributes, "entry->mAttributes should not be null!");
|
|
return entry->mAttributes->SizeOfIncludingThis(aMallocSizeOf);
|
|
}
|
|
|
|
size_t
|
|
nsHTMLStyleSheet::DOMSizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
|
|
{
|
|
size_t n = aMallocSizeOf(this);
|
|
|
|
if (mMappedAttrTable.ops) {
|
|
n += PL_DHashTableSizeOfExcludingThis(&mMappedAttrTable,
|
|
SizeOfAttributesEntryExcludingThis,
|
|
aMallocSizeOf);
|
|
}
|
|
|
|
// Measurement of the following members may be added later if DMD finds it is
|
|
// worthwhile:
|
|
// - mURL
|
|
// - mLinkRule
|
|
// - mVisitedRule
|
|
// - mActiveRule
|
|
// - mTableQuirkColorRule
|
|
// - mTableTHRule
|
|
// - mLangRuleTable
|
|
//
|
|
// The following members are not measured:
|
|
// - mDocument, because it's non-owning
|
|
|
|
return n;
|
|
}
|