[WIP] CSS Motion Path: offset-anchor and offset-position

third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp

Index: third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
diff --git a/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp b/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
index 6ad5b1c4e2d4b13fed9eaac5c9cba9fc914378b1..9129f849c0709af9a5b6c1e37c4a4e68c5f5d52b 100644
--- a/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
+++ b/third_party/WebKit/Source/core/css/parser/CSSPropertyParser.cpp
@@ -1528,7 +1528,7 @@ static CSSValue* consumePathOrNone(CSSParserTokenRange& range)
     return consumePath(range);
 }
 
-static CSSValue* consumeMotionRotation(CSSParserTokenRange& range)
+static CSSValue* consumeOffsetRotation(CSSParserTokenRange& range)
 {
     CSSValue* angle = consumeAngle(range);
     CSSValue* keyword = consumeIdent<CSSValueAuto, CSSValueReverse>(range);
@@ -1546,6 +1546,14 @@ static CSSValue* consumeMotionRotation(CSSParserTokenRange& range)
     return list;
 }
 
+CSSValue* consumeOffsetPosition(CSSParserTokenRange& range, CSSParserMode cssParserMode)
+{
+    CSSValueID id = range.peek().id();
+    if (id == CSSValueAuto)
+        return consumeIdent(range);
+    return consumePosition(range, cssParserMode, UnitlessQuirk::Forbid);
+}
+
 static CSSValue* consumeTextEmphasisStyle(CSSParserTokenRange& range)
 {
     CSSValueID id = range.peek().id();
@@ -3208,6 +3216,9 @@ const CSSValue* CSSPropertyParser::parseSingleValue(CSSPropertyID unresolvedProp
     case CSSPropertyObjectPosition:
     case CSSPropertyPerspectiveOrigin:
         return consumePosition(m_range, m_context.mode(), UnitlessQuirk::Forbid);
+    case CSSPropertyOffsetAnchor:
+    case CSSPropertyOffsetPosition:
+        return consumeOffsetPosition(m_range, m_context.mode());
     case CSSPropertyWebkitLineClamp:
         return consumeLineClamp(m_range);
     case CSSPropertyWebkitFontSizeDelta:
@@ -3307,12 +3318,12 @@ const CSSValue* CSSPropertyParser::parseSingleValue(CSSPropertyID unresolvedProp
     case CSSPropertyTextDecorationLine:
         return consumeTextDecorationLine(m_range);
     case CSSPropertyD:
-    case CSSPropertyMotionPath:
+    case CSSPropertyOffsetPath:
         return consumePathOrNone(m_range);
-    case CSSPropertyMotionOffset:
+    case CSSPropertyOffsetDistance:
         return consumeLengthOrPercent(m_range, m_context.mode(), ValueRangeAll);
-    case CSSPropertyMotionRotation:
-        return consumeMotionRotation(m_range);
+    case CSSPropertyOffsetRotation:
+        return consumeOffsetRotation(m_range);
     case CSSPropertyWebkitTextEmphasisStyle:
         return consumeTextEmphasisStyle(m_range);
     case CSSPropertyOutlineColor:
@@ -4241,10 +4252,8 @@ bool CSSPropertyParser::consumeBackgroundShorthand(const StylePropertyShorthand&
                 if (property == CSSPropertyBackgroundRepeatX || property == CSSPropertyWebkitMaskRepeatX) {
                     consumeRepeatStyleComponent(m_range, value, valueY, implicit);
                 } else if (property == CSSPropertyBackgroundPositionX || property == CSSPropertyWebkitMaskPositionX) {
-                    CSSParserTokenRange rangeCopy = m_range;
-                    if (!consumePosition(rangeCopy, m_context.mode(), UnitlessQuirk::Forbid, value, valueY))
+                    if (!consumePosition(m_range, m_context.mode(), UnitlessQuirk::Forbid, value, valueY))
                         continue;
-                    m_range = rangeCopy;
                 } else if (property == CSSPropertyBackgroundSize || property == CSSPropertyWebkitMaskSize) {
                     if (!consumeSlashIncludingWhitespace(m_range))
                         continue;
@@ -4586,6 +4595,8 @@ bool CSSPropertyParser::parseShorthand(CSSPropertyID unresolvedProperty, bool im
         return consume4Values(paddingShorthand(), important);
     case CSSPropertyMotion:
         return consumeShorthandGreedily(motionShorthand(), important);
+    case CSSPropertyOffset:
+        return consumeShorthandGreedily(offsetShorthand(), important);
     case CSSPropertyWebkitTextEmphasis:
         return consumeShorthandGreedily(webkitTextEmphasisShorthand(), important);
     case CSSPropertyOutline: