Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 322 insertions, 0 deletions

diff --git a/layout/style/CSSKeyframesRule.cpp b/layout/style/CSSKeyframesRule.cpp
new file mode 100644
index 0000000000..5a73700d41
--- /dev/null
+++ b/layout/style/CSSKeyframesRule.cpp
@@ -0,0 +1,322 @@
+/* -*- 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