1 files changed, 110 insertions, 0 deletions
diff --git a/layout/style/ServoDeclarationBlock.cpp b/layout/style/ServoDeclarationBlock.cpp
new file mode 100644
index 000000000..1dc691bfb
--- /dev/null
+++ b/layout/style/ServoDeclarationBlock.cpp
@@ -0,0 +1,110 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/ServoDeclarationBlock.h"
+
+#include "mozilla/ServoBindings.h"
+
+#include "nsCSSProps.h"
+
+namespace mozilla {
+
+/* static */ already_AddRefed<ServoDeclarationBlock>
+ServoDeclarationBlock::FromCssText(const nsAString& aCssText)
+{
+  NS_ConvertUTF16toUTF8 value(aCssText);
+  RefPtr<RawServoDeclarationBlock>
+    raw = Servo_ParseStyleAttribute(&value).Consume();
+  RefPtr<ServoDeclarationBlock> decl = new ServoDeclarationBlock(raw.forget());
+  return decl.forget();
+}
+
+/**
+ * An RAII class holding an atom for the given property.
+ */
+class MOZ_STACK_CLASS PropertyAtomHolder
+{
+public:
+  explicit PropertyAtomHolder(const nsAString& aProperty)
+  {
+    nsCSSPropertyID propID =
+      nsCSSProps::LookupProperty(aProperty, CSSEnabledState::eForAllContent);
+    if (propID == eCSSPropertyExtra_variable) {
+      mIsCustomProperty = true;
+      mAtom = NS_Atomize(
+        Substring(aProperty, CSS_CUSTOM_NAME_PREFIX_LENGTH)).take();
+    } else {
+      mIsCustomProperty = false;
+      if (propID != eCSSProperty_UNKNOWN) {
+        mAtom = nsCSSProps::AtomForProperty(propID);
+      } else {
+        mAtom = nullptr;
+      }
+    }
+  }
+
+  ~PropertyAtomHolder()
+  {
+    if (mIsCustomProperty) {
+      NS_RELEASE(mAtom);
+    }
+  }
+
+  explicit operator bool() const { return !!mAtom; }
+  nsIAtom* Atom() const { MOZ_ASSERT(mAtom); return mAtom; }
+  bool IsCustomProperty() const { return mIsCustomProperty; }
+
+private:
+  nsIAtom* mAtom;
+  bool mIsCustomProperty;
+};
+
+void
+ServoDeclarationBlock::GetPropertyValue(const nsAString& aProperty,
+                                        nsAString& aValue) const
+{
+  if (PropertyAtomHolder holder{aProperty}) {
+    Servo_DeclarationBlock_GetPropertyValue(
+      mRaw, holder.Atom(), holder.IsCustomProperty(), &aValue);
+  }
+}
+
+void
+ServoDeclarationBlock::GetPropertyValueByID(nsCSSPropertyID aPropID,
+                                            nsAString& aValue) const
+{
+  nsIAtom* atom = nsCSSProps::AtomForProperty(aPropID);
+  Servo_DeclarationBlock_GetPropertyValue(mRaw, atom, false, &aValue);
+}
+
+bool
+ServoDeclarationBlock::GetPropertyIsImportant(const nsAString& aProperty) const
+{
+  if (PropertyAtomHolder holder{aProperty}) {
+    return Servo_DeclarationBlock_GetPropertyIsImportant(
+      mRaw, holder.Atom(), holder.IsCustomProperty());
+  }
+  return false;
+}
+
+void
+ServoDeclarationBlock::RemoveProperty(const nsAString& aProperty)
+{
+  AssertMutable();
+  if (PropertyAtomHolder holder{aProperty}) {
+    Servo_DeclarationBlock_RemoveProperty(mRaw, holder.Atom(),
+                                          holder.IsCustomProperty());
+  }
+}
+
+void
+ServoDeclarationBlock::RemovePropertyByID(nsCSSPropertyID aPropID)
+{
+  AssertMutable();
+  nsIAtom* atom = nsCSSProps::AtomForProperty(aPropID);
+  Servo_DeclarationBlock_RemoveProperty(mRaw, atom, false);
+}
+
+} // namespace mozilla