summaryrefslogtreecommitdiffstats
path: root/layout/style/MappedDeclarations.h
diff options
context:
space:
mode:
Diffstat (limited to 'layout/style/MappedDeclarations.h')
-rw-r--r--layout/style/MappedDeclarations.h205
1 files changed, 205 insertions, 0 deletions
diff --git a/layout/style/MappedDeclarations.h b/layout/style/MappedDeclarations.h
new file mode 100644
index 0000000000..52c728097d
--- /dev/null
+++ b/layout/style/MappedDeclarations.h
@@ -0,0 +1,205 @@
+/* -*- 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/. */
+
+/* Representation of a declaration block used for attribute mapping */
+
+#ifndef mozilla_MappedDeclarations_h
+#define mozilla_MappedDeclarations_h
+
+#include "mozilla/FontPropertyTypes.h"
+#include "mozilla/ServoBindingTypes.h"
+#include "mozilla/ServoBindings.h"
+#include "nsCSSPropertyID.h"
+#include "nsCSSValue.h"
+#include "nsColor.h"
+
+class nsAttrValue;
+
+namespace mozilla {
+
+// This provides a convenient interface for attribute mappers
+// (MapAttributesIntoRule) to modify the presentation attribute declaration
+// block for a given element.
+class MappedDeclarations final {
+ public:
+ explicit MappedDeclarations(
+ dom::Document* aDoc, already_AddRefed<StyleLockedDeclarationBlock> aDecls)
+ : mDocument(aDoc), mDecl(aDecls) {
+ MOZ_ASSERT(mDecl);
+ }
+
+ ~MappedDeclarations() { MOZ_ASSERT(!mDecl, "Forgot to take the block?"); }
+
+ dom::Document* Document() { return mDocument; }
+
+ already_AddRefed<StyleLockedDeclarationBlock> TakeDeclarationBlock() {
+ MOZ_ASSERT(mDecl);
+ return mDecl.forget();
+ }
+
+ // Check if we already contain a certain longhand
+ bool PropertyIsSet(nsCSSPropertyID aId) const {
+ return Servo_DeclarationBlock_PropertyIsSet(mDecl, aId);
+ }
+
+ // Set a property to an identifier (string)
+ void SetIdentStringValue(nsCSSPropertyID aId, const nsString& aValue) {
+ RefPtr<nsAtom> atom = NS_AtomizeMainThread(aValue);
+ SetIdentAtomValue(aId, atom);
+ }
+
+ void SetIdentStringValueIfUnset(nsCSSPropertyID aId, const nsString& aValue) {
+ if (!PropertyIsSet(aId)) {
+ SetIdentStringValue(aId, aValue);
+ }
+ }
+
+ void SetIdentAtomValue(nsCSSPropertyID aId, nsAtom* aValue);
+
+ void SetIdentAtomValueIfUnset(nsCSSPropertyID aId, nsAtom* aValue) {
+ if (!PropertyIsSet(aId)) {
+ SetIdentAtomValue(aId, aValue);
+ }
+ }
+
+ // Set a property to a keyword (usually NS_STYLE_* or StyleFoo::*)
+ void SetKeywordValue(nsCSSPropertyID aId, int32_t aValue) {
+ Servo_DeclarationBlock_SetKeywordValue(mDecl, aId, aValue);
+ }
+
+ void SetKeywordValueIfUnset(nsCSSPropertyID aId, int32_t aValue) {
+ if (!PropertyIsSet(aId)) {
+ SetKeywordValue(aId, aValue);
+ }
+ }
+
+ template <typename T,
+ typename = typename std::enable_if<std::is_enum<T>::value>::type>
+ void SetKeywordValue(nsCSSPropertyID aId, T aValue) {
+ static_assert(EnumTypeFitsWithin<T, int32_t>::value,
+ "aValue must be an enum that fits within 32 bits");
+ SetKeywordValue(aId, static_cast<int32_t>(aValue));
+ }
+ template <typename T,
+ typename = typename std::enable_if<std::is_enum<T>::value>::type>
+ void SetKeywordValueIfUnset(nsCSSPropertyID aId, T aValue) {
+ static_assert(EnumTypeFitsWithin<T, int32_t>::value,
+ "aValue must be an enum that fits within 32 bits");
+ SetKeywordValueIfUnset(aId, static_cast<int32_t>(aValue));
+ }
+
+ // Set a property to an integer value
+ void SetIntValue(nsCSSPropertyID aId, int32_t aValue) {
+ Servo_DeclarationBlock_SetIntValue(mDecl, aId, aValue);
+ }
+
+ // Set "math-depth: <integer>" or "math-depth: add(<integer>)"
+ void SetMathDepthValue(int32_t aValue, bool aIsRelative) {
+ Servo_DeclarationBlock_SetMathDepthValue(mDecl, aValue, aIsRelative);
+ }
+
+ // Set "counter-reset: list-item <integer>". If aIsReversed is true then
+ // "list-item" instead becomes "reversed(list-item)".
+ void SetCounterResetListItem(int32_t aValue, bool aIsReversed) {
+ Servo_DeclarationBlock_SetCounterResetListItem(mDecl, aValue, aIsReversed);
+ }
+
+ // Set "counter-set: list-item <integer>".
+ void SetCounterSetListItem(int32_t aValue) {
+ Servo_DeclarationBlock_SetCounterSetListItem(mDecl, aValue);
+ }
+
+ // Set a property to a pixel value
+ void SetPixelValue(nsCSSPropertyID aId, float aValue) {
+ Servo_DeclarationBlock_SetPixelValue(mDecl, aId, aValue);
+ }
+
+ void SetPixelValueIfUnset(nsCSSPropertyID aId, float aValue) {
+ if (!PropertyIsSet(aId)) {
+ SetPixelValue(aId, aValue);
+ }
+ }
+
+ void SetLengthValue(nsCSSPropertyID aId, const nsCSSValue& aValue) {
+ MOZ_ASSERT(aValue.IsLengthUnit());
+ Servo_DeclarationBlock_SetLengthValue(mDecl, aId, aValue.GetFloatValue(),
+ aValue.GetUnit());
+ }
+
+ // Set a property to a number value
+ void SetNumberValue(nsCSSPropertyID aId, float aValue) {
+ Servo_DeclarationBlock_SetNumberValue(mDecl, aId, aValue);
+ }
+
+ // Set a property to a percent value
+ void SetPercentValue(nsCSSPropertyID aId, float aValue) {
+ Servo_DeclarationBlock_SetPercentValue(mDecl, aId, aValue);
+ }
+
+ void SetPercentValueIfUnset(nsCSSPropertyID aId, float aValue) {
+ if (!PropertyIsSet(aId)) {
+ SetPercentValue(aId, aValue);
+ }
+ }
+
+ // Set a property to `auto`
+ void SetAutoValue(nsCSSPropertyID aId) {
+ Servo_DeclarationBlock_SetAutoValue(mDecl, aId);
+ }
+
+ void SetAutoValueIfUnset(nsCSSPropertyID aId) {
+ if (!PropertyIsSet(aId)) {
+ SetAutoValue(aId);
+ }
+ }
+
+ // Set a property to `currentcolor`
+ void SetCurrentColor(nsCSSPropertyID aId) {
+ Servo_DeclarationBlock_SetCurrentColor(mDecl, aId);
+ }
+
+ void SetCurrentColorIfUnset(nsCSSPropertyID aId) {
+ if (!PropertyIsSet(aId)) {
+ SetCurrentColor(aId);
+ }
+ }
+
+ // Set a property to an RGBA nscolor value
+ void SetColorValue(nsCSSPropertyID aId, nscolor aValue) {
+ Servo_DeclarationBlock_SetColorValue(mDecl, aId, aValue);
+ }
+
+ void SetColorValueIfUnset(nsCSSPropertyID aId, nscolor aValue) {
+ if (!PropertyIsSet(aId)) {
+ SetColorValue(aId, aValue);
+ }
+ }
+
+ // Set font-family to a string
+ void SetFontFamily(const nsACString& aValue) {
+ Servo_DeclarationBlock_SetFontFamily(mDecl, &aValue);
+ }
+
+ // Add a quirks-mode override to the decoration color of elements nested in
+ // <a>
+ void SetTextDecorationColorOverride() {
+ Servo_DeclarationBlock_SetTextDecorationColorOverride(mDecl);
+ }
+
+ void SetBackgroundImage(const nsAttrValue& value);
+
+ void SetAspectRatio(float aWidth, float aHeight) {
+ Servo_DeclarationBlock_SetAspectRatio(mDecl, aWidth, aHeight);
+ }
+
+ private:
+ dom::Document* const mDocument;
+ RefPtr<StyleLockedDeclarationBlock> mDecl;
+};
+
+} // namespace mozilla
+
+#endif // mozilla_MappedDeclarations_h