Source code

Revision control

Other Tools

/* -*- 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/. */
#include "mozilla/dom/CSSKeyframesRule.h"
#include "mozilla/dom/CSSKeyframesRuleBinding.h"
#include "mozilla/dom/CSSRuleList.h"
#include "mozilla/ServoBindings.h"
#include "nsCOMArray.h"
#include <limits>
namespace mozilla {
namespace dom {
// -------------------------------------------
// CSSKeyframeList
//
class CSSKeyframeList : public dom::CSSRuleList {
public:
CSSKeyframeList(already_AddRefed<RawServoKeyframesRule> aRawRule,
StyleSheet* aSheet, CSSKeyframesRule* aParentRule)
: mStyleSheet(aSheet), mParentRule(aParentRule), mRawRule(aRawRule) {
mRules.SetCount(Servo_KeyframesRule_GetCount(mRawRule));
}
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(CSSKeyframeList, dom::CSSRuleList)
void DropSheetReference() {
if (!mStyleSheet) {
return;
}
mStyleSheet = nullptr;
for (css::Rule* rule : mRules) {
if (rule) {
rule->DropSheetReference();
}
}
}
StyleSheet* GetParentObject() final { return mStyleSheet; }
CSSKeyframeRule* GetRule(uint32_t aIndex) {
if (!mRules[aIndex]) {
uint32_t line = 0, column = 0;
RefPtr<RawServoKeyframe> rule =
Servo_KeyframesRule_GetKeyframeAt(mRawRule, aIndex, &line, &column)
.Consume();
CSSKeyframeRule* ruleObj = new CSSKeyframeRule(rule.forget(), mStyleSheet,
mParentRule, line, column);
mRules.ReplaceObjectAt(ruleObj, aIndex);
}
return static_cast<CSSKeyframeRule*>(mRules[aIndex]);
}
CSSKeyframeRule* IndexedGetter(uint32_t aIndex, bool& aFound) final {
if (aIndex >= mRules.Length()) {
aFound = false;
return nullptr;
}
aFound = true;
return GetRule(aIndex);
}
void AppendRule() {
MOZ_ASSERT(!mParentRule->IsReadOnly());
mRules.AppendObject(nullptr);
}
void RemoveRule(uint32_t aIndex) {
MOZ_ASSERT(!mParentRule->IsReadOnly());
if (aIndex >= mRules.Length()) {
return;
}
if (css::Rule* child = mRules[aIndex]) {
child->DropReferences();
}
mRules.RemoveObjectAt(aIndex);
}
uint32_t Length() final { return mRules.Length(); }
void DropReferences() {
if (!mStyleSheet && !mParentRule) {
return;
}
mStyleSheet = nullptr;
mParentRule = nullptr;
for (css::Rule* rule : mRules) {
if (rule) {
rule->DropParentRuleReference();
rule->DropSheetReference();
}
}
}
size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const {
size_t n = aMallocSizeOf(this);
for (const css::Rule* rule : mRules) {
n += rule ? rule->SizeOfIncludingThis(aMallocSizeOf) : 0;
}
return n;
}
private:
virtual ~CSSKeyframeList() {
MOZ_ASSERT(!mParentRule, "Backpointer should have been cleared");
MOZ_ASSERT(!mStyleSheet, "Backpointer should have been cleared");
DropAllRules();
}
void DropAllRules() {
DropReferences();
mRules.Clear();
mRawRule = nullptr;
}
// may be nullptr when the style sheet drops the reference to us.
StyleSheet* mStyleSheet = nullptr;
CSSKeyframesRule* mParentRule = nullptr;
RefPtr<RawServoKeyframesRule> mRawRule;
nsCOMArray<css::Rule> mRules;
};
// QueryInterface implementation for CSSKeyframeList
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(CSSKeyframeList)
NS_INTERFACE_MAP_END_INHERITING(dom::CSSRuleList)
NS_IMPL_ADDREF_INHERITED(CSSKeyframeList, dom::CSSRuleList)
NS_IMPL_RELEASE_INHERITED(CSSKeyframeList, dom::CSSRuleList)
NS_IMPL_CYCLE_COLLECTION_CLASS(CSSKeyframeList)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(CSSKeyframeList)
tmp->DropAllRules();
NS_IMPL_CYCLE_COLLECTION_UNLINK_END_INHERITED(dom::CSSRuleList)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(CSSKeyframeList,
dom::CSSRuleList)
for (css::Rule* rule : tmp->mRules) {
if (rule) {
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mRules[i]");
cb.NoteXPCOMChild(rule);
}
}
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
// -------------------------------------------
// CSSKeyframesRule
//
CSSKeyframesRule::CSSKeyframesRule(RefPtr<RawServoKeyframesRule> aRawRule,
StyleSheet* aSheet, css::Rule* aParentRule,
uint32_t aLine, uint32_t aColumn)
: css::Rule(aSheet, aParentRule, aLine, aColumn),
mRawRule(std::move(aRawRule)) {}
CSSKeyframesRule::~CSSKeyframesRule() {
if (mKeyframeList) {
mKeyframeList->DropReferences();
}
}
NS_IMPL_ADDREF_INHERITED(CSSKeyframesRule, css::Rule)
NS_IMPL_RELEASE_INHERITED(CSSKeyframesRule, css::Rule)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(CSSKeyframesRule)
NS_INTERFACE_MAP_END_INHERITING(css::Rule)
NS_IMPL_CYCLE_COLLECTION_CLASS(CSSKeyframesRule)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(CSSKeyframesRule, css::Rule)
if (tmp->mKeyframeList) {
tmp->mKeyframeList->DropReferences();
tmp->mKeyframeList = nullptr;
}
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(CSSKeyframesRule, Rule)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mKeyframeList)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
/* virtual */
bool CSSKeyframesRule::IsCCLeaf() const {
// If we don't have rule list constructed, we are a leaf.
return Rule::IsCCLeaf() && !mKeyframeList;
}
#ifdef DEBUG
/* virtual */
void CSSKeyframesRule::List(FILE* out, int32_t aIndent) const {
nsAutoCString str;
for (int32_t i = 0; i < aIndent; i++) {
str.AppendLiteral(" ");
}
Servo_KeyframesRule_Debug(mRawRule, &str);
fprintf_stderr(out, "%s\n", str.get());
}
#endif
/* virtual */
void CSSKeyframesRule::DropSheetReference() {
if (mKeyframeList) {
mKeyframeList->DropSheetReference();
}
css::Rule::DropSheetReference();
}
static const uint32_t kRuleNotFound = std::numeric_limits<uint32_t>::max();
uint32_t CSSKeyframesRule::FindRuleIndexForKey(const nsAString& aKey) {
NS_ConvertUTF16toUTF8 key(aKey);
return Servo_KeyframesRule_FindRule(mRawRule, &key);
}
template <typename Func>
nsresult CSSKeyframesRule::UpdateRule(Func aCallback) {
if (IsReadOnly()) {
return NS_OK;
}
aCallback();
if (StyleSheet* sheet = GetStyleSheet()) {
sheet->RuleChanged(this, StyleRuleChangeKind::Generic);
}
return NS_OK;
}
void CSSKeyframesRule::GetName(nsAString& aName) const {
nsAtom* name = Servo_KeyframesRule_GetName(mRawRule);
aName = nsDependentAtomString(name);
}
void CSSKeyframesRule::SetName(const nsAString& aName) {
RefPtr<nsAtom> name = NS_Atomize(aName);
nsAtom* oldName = Servo_KeyframesRule_GetName(mRawRule);
if (name == oldName) {
return;
}
UpdateRule([this, &name]() {
Servo_KeyframesRule_SetName(mRawRule, name.forget().take());
});
}
void CSSKeyframesRule::AppendRule(const nsAString& aRule) {
StyleSheet* sheet = GetStyleSheet();
if (!sheet) {
// We cannot parse the rule if we don't have a stylesheet.
return;
}
NS_ConvertUTF16toUTF8 rule(aRule);
UpdateRule([this, sheet, &rule]() {
bool parsedOk =
Servo_KeyframesRule_AppendRule(mRawRule, sheet->RawContents(), &rule);
if (parsedOk && mKeyframeList) {
mKeyframeList->AppendRule();
}
});
}
void CSSKeyframesRule::DeleteRule(const nsAString& aKey) {
auto index = FindRuleIndexForKey(aKey);
if (index == kRuleNotFound) {
return;
}
UpdateRule([this, index]() {
Servo_KeyframesRule_DeleteRule(mRawRule, index);
if (mKeyframeList) {
mKeyframeList->RemoveRule(index);
}
});
}
/* virtual */
void CSSKeyframesRule::GetCssText(nsACString& aCssText) const {
Servo_KeyframesRule_GetCssText(mRawRule, &aCssText);
}
/* virtual */ dom::CSSRuleList* CSSKeyframesRule::CssRules() {
if (!mKeyframeList) {
mKeyframeList = new CSSKeyframeList(do_AddRef(mRawRule), mSheet, this);
}
return mKeyframeList;
}
/* virtual */ dom::CSSKeyframeRule* CSSKeyframesRule::FindRule(
const nsAString& aKey) {
auto index = FindRuleIndexForKey(aKey);
if (index != kRuleNotFound) {
// Construct mKeyframeList but ignore the result.
CssRules();
return mKeyframeList->GetRule(index);
}
return nullptr;
}
/* virtual */
size_t CSSKeyframesRule::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const {
size_t n = aMallocSizeOf(this);
if (mKeyframeList) {
n += mKeyframeList->SizeOfIncludingThis(aMallocSizeOf);
}
return n;
}
/* virtual */
JSObject* CSSKeyframesRule::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return CSSKeyframesRule_Binding::Wrap(aCx, this, aGivenProto);
}
} // namespace dom
} // namespace mozilla