[CSS Grid Layout] Implement 'justify-self' parsing

Source/core/css/CSSParser-in.cpp

 /*
  * Copyright (C) 2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
  * Copyright (C) 2012 Intel Corporation. All rights reserved.
  *
@@ skipping 2468 matching lines @@
     case CSSPropertyWebkitTransitionProperty: {
         RefPtr<CSSValue> val;
         AnimationParseContext context;
         if (parseAnimationProperty(propId, val, context)) {
             addPropertyWithPrefixingVariant(propId, val.release(), important);
             return true;
         }
         return false;
     }
 
+    case CSSPropertyJustifySelf:
+        if (!RuntimeEnabledFeatures::cssGridLayoutEnabled())
+            return false;
+
+        return parseJustifySelf(propId, important);
     case CSSPropertyGridAutoColumns:
     case CSSPropertyGridAutoRows:
         if (!RuntimeEnabledFeatures::cssGridLayoutEnabled())
             return false;
         parsedValue = parseGridTrackSize(*m_valueList);
         break;
 
     case CSSPropertyGridDefinitionColumns:
     case CSSPropertyGridDefinitionRows:
         if (!RuntimeEnabledFeatures::cssGridLayoutEnabled())
@@ skipping 2628 matching lines @@
         i++;
     }
     if (valid) {
         addProperty(propId, cssValuePool().createValue(rect.release()), important);
         m_valueList->next();
         return true;
     }
     return false;
 }
 
+static bool isItemPosition(CSSValueID id)

[ojan, 2013/11/25 21:24:08]

This is a confusing name...how about...isJustifySelfKeyword?

[Julien - ping for review, 2013/11/26 00:08:24]

This syntax is also used for justify-items / align-self / align-items so this
name is going to be confusing down the road.

FYI the name is from the specification which calls the following sub-grammar
<item-position>.

Alternative names: isAlignPositionKeyword, isItemPositionKeyword,
isAlignJustifyPositionKeyword

+{
+    return id == CSSValueStart || id == CSSValueEnd || id == CSSValueCenter
+        || id == CSSValueSelfStart || id == CSSValueSelfEnd || id == CSSValueFlexStart
+        || id == CSSValueFlexEnd || id == CSSValueLeft || id == CSSValueRight;
+}
+
+bool CSSParser::parseJustifySelf(CSSPropertyID propId, bool important)
+{
+    // auto | baseline | stretch | [<item-position> && <overflow-position>? ]
+    // <item-position> = center | start | end | self-start | self-end | flex-start | flex-end | left | right;
+    // <overflow-position> = true | safe
+
+    CSSParserValue* value = m_valueList->current();
+
+    if (value->id == CSSValueAuto || value->id == CSSValueBaseline || value->id == CSSValueStretch) {
+        if (m_valueList->next())
+            return false;
+
+        addProperty(propId, cssValuePool().createIdentifierValue(value->id), important);
+        return true;
+    }
+
+    RefPtr<CSSPrimitiveValue> position = 0;
+    RefPtr<CSSPrimitiveValue> overflowAlignmentKeyword = 0;
+    if (isItemPosition(value->id)) {
+        position = cssValuePool().createIdentifierValue(value->id);
+        value = m_valueList->next();
+        if (value) {
+            if (value->id == CSSValueTrue || value->id == CSSValueSafe)
+                overflowAlignmentKeyword = cssValuePool().createIdentifierValue(value->id);
+            else
+                return false;
+        }
+    } else if (value->id == CSSValueTrue || value->id == CSSValueSafe) {
+        overflowAlignmentKeyword = cssValuePool().createIdentifierValue(value->id);
+        value = m_valueList->next();
+        if (value) {
+            if (isItemPosition(value->id))
+                position = cssValuePool().createIdentifierValue(value->id);
+            else
+                return false;
+        }
+    } else {
+        return false;
+    }
+
+    if (m_valueList->next())
+        return false;
+
+    ASSERT(position);
+    if (overflowAlignmentKeyword)
+        addProperty(propId, createPrimitiveValuePair(position, overflowAlignmentKeyword), important);
+    else
+        addProperty(propId, position.release(), important);
+
+    return true;
+}
+
 PassRefPtr<CSSBasicShape> CSSParser::parseBasicShapeRectangle(CSSParserValueList* args)
 {
     ASSERT(args);
 
     // rect(x, y, width, height, [[rx], ry])
     if (args->size() != 7 && args->size() != 9 && args->size() != 11)
         return 0;
 
     RefPtr<CSSBasicShapeRectangle> shape = CSSBasicShapeRectangle::create();
 
@@ skipping 6806 matching lines @@
 {
     // The tokenizer checks for the construct of an+b.
     // However, since the {ident} rule precedes the {nth} rule, some of those
     // tokens are identified as string literal. Furthermore we need to accept
     // "odd" and "even" which does not match to an+b.
     return equalIgnoringCase(token, "odd") || equalIgnoringCase(token, "even")
         || equalIgnoringCase(token, "n") || equalIgnoringCase(token, "-n");
 }
 
 }