зеркало из https://github.com/mozilla/gecko-dev.git
623 строки
18 KiB
C++
623 строки
18 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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* 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 "mozilla/EventStates.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 "nsHashKeys.h"
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#include "mozilla/OperatorNewExtensions.h"
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#include "mozilla/RestyleManager.h"
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#include "mozilla/RestyleManagerInlines.h"
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#include "mozilla/ServoStyleSet.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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NS_IMPL_ISUPPORTS(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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/* virtual */ bool
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nsHTMLStyleSheet::HTMLColorRule::MightMapInheritedStyleData()
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{
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return true;
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}
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/* virtual */ bool
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nsHTMLStyleSheet::HTMLColorRule::
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GetDiscretelyAnimatedCSSValue(nsCSSPropertyID aProperty, nsCSSValue* aValue)
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{
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MOZ_ASSERT(false, "GetDiscretelyAnimatedCSSValue is not implemented yet");
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return false;
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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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nsAutoCString indentStr;
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for (int32_t index = aIndent; --index >= 0; ) {
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indentStr.AppendLiteral(" ");
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}
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fprintf_stderr(out, "%s[html color rule] {}\n", indentStr.get());
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}
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#endif
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NS_IMPL_ISUPPORTS(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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nsAutoCString indentStr;
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for (int32_t index = aIndent; --index >= 0; ) {
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indentStr.AppendLiteral(" ");
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}
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fprintf_stderr(out, "%s[generic table rule] {}\n", indentStr.get());
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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 */ bool
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nsHTMLStyleSheet::TableTHRule::MightMapInheritedStyleData()
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{
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return true;
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}
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/* virtual */ bool
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nsHTMLStyleSheet::TableTHRule::
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GetDiscretelyAnimatedCSSValue(nsCSSPropertyID aProperty, nsCSSValue* aValue)
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{
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MOZ_ASSERT(false, "GetDiscretelyAnimatedCSSValue is not implemented yet");
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return false;
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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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/* virtual */ bool
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nsHTMLStyleSheet::TableQuirkColorRule::MightMapInheritedStyleData()
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{
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return true;
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}
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/* virtual */ bool
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nsHTMLStyleSheet::TableQuirkColorRule::
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GetDiscretelyAnimatedCSSValue(nsCSSPropertyID aProperty, nsCSSValue* aValue)
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{
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MOZ_ASSERT(false, "GetDiscretelyAnimatedCSSValue is not implemented yet");
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return false;
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}
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NS_IMPL_ISUPPORTS(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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RefPtr<nsAtom> langAtom = mLang;
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lang->SetAtomIdentValue(langAtom.forget());
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}
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}
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}
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/* virtual */ bool
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nsHTMLStyleSheet::LangRule::MightMapInheritedStyleData()
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{
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return true;
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}
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/* virtual */ bool
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nsHTMLStyleSheet::LangRule::
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GetDiscretelyAnimatedCSSValue(nsCSSPropertyID aProperty, nsCSSValue* aValue)
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{
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MOZ_ASSERT(false, "GetDiscretelyAnimatedCSSValue is not implemented yet");
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return false;
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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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nsAutoCString str;
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for (int32_t index = aIndent; --index >= 0; ) {
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str.AppendLiteral(" ");
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}
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str.AppendLiteral("[lang rule] { language: \"");
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AppendUTF16toUTF8(nsDependentAtomString(mLang), str);
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str.AppendLiteral("\" }\n");
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fprintf_stderr(out, "%s", str.get());
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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(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(const PLDHashEntryHdr *hdr, 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 const PLDHashTableOps MappedAttrTable_Ops = {
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MappedAttrTable_HashKey,
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MappedAttrTable_MatchEntry,
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PLDHashTable::MoveEntryStub,
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MappedAttrTable_ClearEntry,
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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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RefPtr<nsHTMLStyleSheet::LangRule> mRule;
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};
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static PLDHashNumber
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LangRuleTable_HashKey(const void *key)
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{
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auto* lang = static_cast<const nsAtom*>(key);
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return lang->hash();
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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(const PLDHashEntryHdr *hdr, const void *key)
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{
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auto* lang = static_cast<const nsAtom*>(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 void
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LangRuleTable_InitEntry(PLDHashEntryHdr *hdr, const void *key)
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{
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auto* lang = static_cast<const nsAtom*>(key);
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LangRuleTableEntry* entry = new (KnownNotNull, hdr) LangRuleTableEntry();
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// Create the unique rule for this language
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entry->mRule = new nsHTMLStyleSheet::LangRule(const_cast<nsAtom*>(lang));
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}
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static const PLDHashTableOps LangRuleTable_Ops = {
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LangRuleTable_HashKey,
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LangRuleTable_MatchEntry,
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PLDHashTable::MoveEntryStub,
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LangRuleTable_ClearEntry,
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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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, mMappedAttrTable(&MappedAttrTable_Ops, sizeof(MappedAttrTableEntry))
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, mMappedAttrsDirty(false)
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, mLangRuleTable(&LangRuleTable_Ops, sizeof(LangRuleTableEntry))
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{
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MOZ_ASSERT(aDocument);
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}
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NS_IMPL_ISUPPORTS(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 (!ruleWalker->AuthorStyleDisabled()) {
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// if we have anchor colors, check if this is an anchor with an href
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if (aData->mElement->IsHTMLElement(nsGkAtoms::a)) {
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if (mLinkRule || mVisitedRule || mActiveRule) {
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EventStates state =
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nsCSSRuleProcessor::GetContentStateForVisitedHandling(
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aData->mElement,
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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 (aData->mElement->IsHTMLElement(nsGkAtoms::th)) {
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ruleWalker->Forward(mTableTHRule);
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}
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else if (aData->mElement->IsHTMLElement(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->IsSVGElement()) {
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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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const nsAttrValue* langAttr =
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aData->mElement->GetParsedAttr(nsGkAtoms::lang, kNameSpaceID_XML);
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if (langAttr) {
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MOZ_ASSERT(langAttr->Type() == nsAttrValue::eAtom);
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ruleWalker->Forward(LangRuleFor(langAttr->GetAtomValue()));
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}
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// Set the language to "x-math" on the <math> element, so that appropriate
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// font settings are used for MathML.
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if (aData->mElement->IsMathMLElement(nsGkAtoms::math)) {
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ruleWalker->Forward(LangRuleFor(nsGkAtoms::x_math));
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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->IsHTMLElement(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 */ nsRestyleHint
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nsHTMLStyleSheet::HasStateDependentStyle(PseudoElementStateRuleProcessorData* aData)
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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(
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AttributeRuleProcessorData* aData,
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RestyleHintData& aRestyleHintDataResult)
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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->IsHTMLElement(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->IsHTMLElement(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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mServoUnvisitedLinkDecl = nullptr;
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mServoVisitedLinkDecl = nullptr;
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mServoActiveLinkDecl = nullptr;
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mLangRuleTable.Clear();
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mMappedAttrTable.Clear();
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mMappedAttrsDirty = false;
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}
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nsresult
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nsHTMLStyleSheet::ImplLinkColorSetter(
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RefPtr<HTMLColorRule>& aRule,
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RefPtr<RawServoDeclarationBlock>& aDecl,
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nscolor aColor)
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{
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if (!mDocument || !mDocument->GetShell()) {
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return NS_OK;
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}
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RestyleManager* restyle =
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mDocument->GetShell()->GetPresContext()->RestyleManager();
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if (restyle->IsServo()) {
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MOZ_ASSERT(!ServoStyleSet::IsInServoTraversal());
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aDecl = Servo_DeclarationBlock_CreateEmpty().Consume();
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Servo_DeclarationBlock_SetColorValue(aDecl.get(), eCSSProperty_color,
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aColor);
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} else {
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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(aColor);
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if (!aRule) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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}
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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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Element* root = mDocument->GetRootElement();
|
|
if (root) {
|
|
restyle->PostRestyleEvent(root, eRestyle_Subtree, nsChangeHint(0));
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsHTMLStyleSheet::SetLinkColor(nscolor aColor)
|
|
{
|
|
return ImplLinkColorSetter(mLinkRule, mServoUnvisitedLinkDecl, aColor);
|
|
}
|
|
|
|
|
|
nsresult
|
|
nsHTMLStyleSheet::SetActiveLinkColor(nscolor aColor)
|
|
{
|
|
return ImplLinkColorSetter(mActiveRule, mServoActiveLinkDecl, aColor);
|
|
}
|
|
|
|
nsresult
|
|
nsHTMLStyleSheet::SetVisitedLinkColor(nscolor aColor)
|
|
{
|
|
return ImplLinkColorSetter(mVisitedRule, mServoVisitedLinkDecl, aColor);
|
|
}
|
|
|
|
already_AddRefed<nsMappedAttributes>
|
|
nsHTMLStyleSheet::UniqueMappedAttributes(nsMappedAttributes* aMapped)
|
|
{
|
|
mMappedAttrsDirty = true;
|
|
auto entry = static_cast<MappedAttrTableEntry*>
|
|
(mMappedAttrTable.Add(aMapped, fallible));
|
|
if (!entry)
|
|
return nullptr;
|
|
if (!entry->mAttributes) {
|
|
// We added a new entry to the hashtable, so we have a new unique set.
|
|
entry->mAttributes = aMapped;
|
|
}
|
|
RefPtr<nsMappedAttributes> ret = entry->mAttributes;
|
|
return ret.forget();
|
|
}
|
|
|
|
void
|
|
nsHTMLStyleSheet::DropMappedAttributes(nsMappedAttributes* aMapped)
|
|
{
|
|
NS_ENSURE_TRUE_VOID(aMapped);
|
|
#ifdef DEBUG
|
|
uint32_t entryCount = mMappedAttrTable.EntryCount() - 1;
|
|
#endif
|
|
|
|
mMappedAttrTable.Remove(aMapped);
|
|
|
|
NS_ASSERTION(entryCount == mMappedAttrTable.EntryCount(), "not removed");
|
|
}
|
|
|
|
void
|
|
nsHTMLStyleSheet::CalculateMappedServoDeclarations(nsPresContext* aPresContext)
|
|
{
|
|
MOZ_ASSERT(!mDocument->GetShell() ||
|
|
mDocument->GetShell()->GetPresContext() == aPresContext);
|
|
|
|
for (auto iter = mMappedAttrTable.Iter(); !iter.Done(); iter.Next()) {
|
|
MappedAttrTableEntry* attr = static_cast<MappedAttrTableEntry*>(iter.Get());
|
|
if (attr->mAttributes->GetServoStyle()) {
|
|
// Only handle cases which haven't been filled in already
|
|
continue;
|
|
}
|
|
attr->mAttributes->LazilyResolveServoDeclaration(aPresContext);
|
|
}
|
|
}
|
|
|
|
nsIStyleRule*
|
|
nsHTMLStyleSheet::LangRuleFor(const nsAtom* aLanguage)
|
|
{
|
|
auto entry =
|
|
static_cast<LangRuleTableEntry*>(mLangRuleTable.Add(aLanguage, fallible));
|
|
if (!entry) {
|
|
NS_ASSERTION(false, "out of memory");
|
|
return nullptr;
|
|
}
|
|
return entry->mRule;
|
|
}
|
|
|
|
size_t
|
|
nsHTMLStyleSheet::DOMSizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
|
|
{
|
|
size_t n = aMallocSizeOf(this);
|
|
|
|
n += mMappedAttrTable.ShallowSizeOfExcludingThis(aMallocSizeOf);
|
|
for (auto iter = mMappedAttrTable.ConstIter(); !iter.Done(); iter.Next()) {
|
|
auto entry = static_cast<MappedAttrTableEntry*>(iter.Get());
|
|
n += entry->mAttributes->SizeOfIncludingThis(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;
|
|
}
|