Bug 1435984 - patch 4 - Expose variationSettings on the FontFace webidl interface. r=bz,jwatt

--HG--
extra : source : 987305fa2a5faba6da86f8f0d494a6ce3dc77b33

dom/webidl/FontFace.webidl

@@ -19,6 +19,7 @@ dictionary FontFaceDescriptors {
   DOMString unicodeRange = "U+0-10FFFF";
   DOMString variant = "normal";
   DOMString featureSettings = "normal";
+  DOMString variationSettings = "normal";
   DOMString display = "auto";
 };
 
@@ -38,6 +39,7 @@ interface FontFace {
   [SetterThrows] attribute DOMString unicodeRange;
   [SetterThrows] attribute DOMString variant;
   [SetterThrows] attribute DOMString featureSettings;
+  [SetterThrows, Pref="layout.css.font-variations.enabled"] attribute DOMString variationSettings;
   [SetterThrows, Pref="layout.css.font-display.enabled"] attribute DOMString display;
 
   readonly attribute FontFaceLoadStatus status;

layout/style/FontFace.cpp

@@ -20,6 +20,7 @@
 #include "nsCSSParser.h"
 #include "nsIDocument.h"
 #include "nsStyleUtil.h"
+#include "StylePrefs.h"
 
 namespace mozilla {
 namespace dom {
@@ -344,6 +345,21 @@ FontFace::SetFeatureSettings(const nsAString& aValue, ErrorResult& aRv)
   SetDescriptor(eCSSFontDesc_FontFeatureSettings, aValue, aRv);
 }
 
+void
+FontFace::GetVariationSettings(nsString& aResult)
+{
+  mFontFaceSet->FlushUserFontSet();
+  GetDesc(eCSSFontDesc_FontVariationSettings, eCSSProperty_font_variation_settings,
+          aResult);
+}
+
+void
+FontFace::SetVariationSettings(const nsAString& aValue, ErrorResult& aRv)
+{
+  mFontFaceSet->FlushUserFontSet();
+  SetDescriptor(eCSSFontDesc_FontVariationSettings, aValue, aRv);
+}
+
 void
 FontFace::GetDisplay(nsString& aResult)
 {
@@ -600,6 +616,10 @@ FontFace::SetDescriptors(const nsAString& aFamily,
       !ParseDescriptor(eCSSFontDesc_FontFeatureSettings,
                        aDescriptors.mFeatureSettings,
                        mDescriptors->mFontFeatureSettings) ||
+      (StylePrefs::sFontVariationsEnabled &&
+       !ParseDescriptor(eCSSFontDesc_FontVariationSettings,
+                        aDescriptors.mVariationSettings,
+                        mDescriptors->mFontVariationSettings)) ||
       !ParseDescriptor(eCSSFontDesc_Display,
                        aDescriptors.mDisplay,
                        mDescriptors->mDisplay)) {

layout/style/FontFace.h

@@ -162,6 +162,8 @@ public:
   void SetVariant(const nsAString& aValue, mozilla::ErrorResult& aRv);
   void GetFeatureSettings(nsString& aResult);
   void SetFeatureSettings(const nsAString& aValue, mozilla::ErrorResult& aRv);
+  void GetVariationSettings(nsString& aResult);
+  void SetVariationSettings(const nsAString& aValue, mozilla::ErrorResult& aRv);
   void GetDisplay(nsString& aResult);
   void SetDisplay(const nsAString& aValue, mozilla::ErrorResult& aRv);