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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* style sheet and style rule processor representing data from presentational
* HTML attributes
*/
#include "nsHTMLStyleSheet.h"
#include "nsMappedAttributes.h"
#include "nsGkAtoms.h"
#include "nsPresContext.h"
#include "mozilla/EventStates.h"
#include "mozilla/PresShell.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/DocumentInlines.h"
#include "nsStyleConsts.h"
#include "nsError.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/dom/Element.h"
#include "nsHashKeys.h"
#include "mozilla/OperatorNewExtensions.h"
#include "mozilla/RestyleManager.h"
#include "mozilla/ServoBindings.h"
#include "mozilla/ServoStyleSet.h"
using namespace mozilla;
using namespace mozilla::dom;
// -----------------------------------------------------------
struct MappedAttrTableEntry : public PLDHashEntryHdr {
nsMappedAttributes* mAttributes;
};
static PLDHashNumber MappedAttrTable_HashKey(const void* key) {
nsMappedAttributes* attributes =
static_cast<nsMappedAttributes*>(const_cast<void*>(key));
return attributes->HashValue();
}
static void MappedAttrTable_ClearEntry(PLDHashTable* table,
PLDHashEntryHdr* hdr) {
MappedAttrTableEntry* entry = static_cast<MappedAttrTableEntry*>(hdr);
entry->mAttributes->DropStyleSheetReference();
memset(entry, 0, sizeof(MappedAttrTableEntry));
}
static bool MappedAttrTable_MatchEntry(const PLDHashEntryHdr* hdr,
const void* key) {
nsMappedAttributes* attributes =
static_cast<nsMappedAttributes*>(const_cast<void*>(key));
const MappedAttrTableEntry* entry =
static_cast<const MappedAttrTableEntry*>(hdr);
return attributes->Equals(entry->mAttributes);
}
static const PLDHashTableOps MappedAttrTable_Ops = {
MappedAttrTable_HashKey, MappedAttrTable_MatchEntry,
PLDHashTable::MoveEntryStub, MappedAttrTable_ClearEntry, nullptr};
// -----------------------------------------------------------
// -----------------------------------------------------------
nsHTMLStyleSheet::nsHTMLStyleSheet(Document* aDocument)
: mDocument(aDocument),
mMappedAttrTable(&MappedAttrTable_Ops, sizeof(MappedAttrTableEntry)),
mMappedAttrsDirty(false) {
MOZ_ASSERT(aDocument);
}
void nsHTMLStyleSheet::SetOwningDocument(Document* aDocument) {
mDocument = aDocument; // not refcounted
}
void nsHTMLStyleSheet::Reset() {
mServoUnvisitedLinkDecl = nullptr;
mServoVisitedLinkDecl = nullptr;
mServoActiveLinkDecl = nullptr;
mMappedAttrTable.Clear();
mMappedAttrsDirty = false;
}
nsresult nsHTMLStyleSheet::ImplLinkColorSetter(
RefPtr<RawServoDeclarationBlock>& aDecl, nscolor aColor) {
if (!mDocument || !mDocument->GetPresShell()) {
return NS_OK;
}
MOZ_ASSERT(!ServoStyleSet::IsInServoTraversal());
aDecl = Servo_DeclarationBlock_CreateEmpty().Consume();
Servo_DeclarationBlock_SetColorValue(aDecl.get(), eCSSProperty_color, aColor);
// Now make sure we restyle any links that might need it. This
// shouldn't happen often, so just rebuilding everything is ok.
if (Element* root = mDocument->GetRootElement()) {
RestyleManager* rm = mDocument->GetPresContext()->RestyleManager();
rm->PostRestyleEvent(root, RestyleHint::RestyleSubtree(), nsChangeHint(0));
}
return NS_OK;
}
nsresult nsHTMLStyleSheet::SetLinkColor(nscolor aColor) {
return ImplLinkColorSetter(mServoUnvisitedLinkDecl, aColor);
}
nsresult nsHTMLStyleSheet::SetActiveLinkColor(nscolor aColor) {
return ImplLinkColorSetter(mServoActiveLinkDecl, aColor);
}
nsresult nsHTMLStyleSheet::SetVisitedLinkColor(nscolor aColor) {
return ImplLinkColorSetter(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() {
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(mDocument);
}
}
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;
}