Bug 1248708 - Part1: parse and compute -webkit-text-stroke property. r=heycam

layout/style/nsCSSParser.cpp

@@ -1086,6 +1086,7 @@ protected:
   bool ParseScrollSnapPoints(nsCSSValue& aValue, nsCSSProperty aPropID);
   bool ParseScrollSnapDestination(nsCSSValue& aValue);
   bool ParseScrollSnapCoordinate(nsCSSValue& aValue);
+  bool ParseWebkitTextStroke();
 
   /**
    * Parses a variable value from a custom property declaration.
@@ -10803,6 +10804,37 @@ CSSParserImpl::ParseWebkitGradient(nsCSSValue& aValue)
   return true;
 }
 
+bool
+CSSParserImpl::ParseWebkitTextStroke()
+{
+  static const nsCSSProperty kWebkitTextStrokeIDs[] = {
+    eCSSProperty__webkit_text_stroke_width,
+    eCSSProperty__webkit_text_stroke_color
+  };
+
+  const size_t numProps = ArrayLength(kWebkitTextStrokeIDs);
+  nsCSSValue values[numProps];
+
+  int32_t found = ParseChoice(values, kWebkitTextStrokeIDs, numProps);
+  if (found < 1) {
+    return false;
+  }
+
+  if (!(found & 1)) { // Provide default -webkit-text-stroke-width
+    values[0].SetFloatValue(0, eCSSUnit_Pixel);
+  }
+
+  if (!(found & 2)) { // Provide default -webkit-text-stroke-color
+    values[1].SetIntValue(NS_COLOR_CURRENTCOLOR, eCSSUnit_EnumColor);
+  }
+
+  for (size_t index = 0; index < numProps; ++index) {
+    AppendValue(kWebkitTextStrokeIDs[index], values[index]);
+  }
+
+  return true;
+}
+
   int32_t
 CSSParserImpl::ParseChoice(nsCSSValue aValues[],
                            const nsCSSProperty aPropIDs[], int32_t aNumIDs)
@@ -11576,6 +11608,8 @@ CSSParserImpl::ParsePropertyByFunction(nsCSSProperty aPropID)
   case eCSSProperty_mask_size:
     return ParseImageLayerSize(eCSSProperty_mask_size);
 #endif
+  case eCSSProperty__webkit_text_stroke:
+    return ParseWebkitTextStroke();
   case eCSSProperty_all:
     return ParseAll();
   default: