Implements hanging property for text-indent from CSS3

Source/core/css/CSSComputedStyleDeclaration.cpp

 /*
  * Copyright (C) 2004 Zack Rusin <zack@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2011 Sencha, Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
@@ skipping 2202 matching lines @@
             case TextEmphasisMarkDoubleCircle:
             case TextEmphasisMarkTriangle:
             case TextEmphasisMarkSesame: {
                 RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
                 list->append(cssValuePool().createValue(style->textEmphasisFill()));
                 list->append(cssValuePool().createValue(style->textEmphasisMark()));
                 return list.release();
             }
             }
         case CSSPropertyTextIndent: {
+            // If RuntimeEnabledFeatures::css3TextEnabled() returns false or text-indent has only one value(<length> | <percentage>),
+            // getPropertyCSSValue() returns CSSValue.
+            // If RuntimeEnabledFeatures::css3TextEnabled() returns true and text-indent has each-line or hanging,
+            // getPropertyCSSValue() returns CSSValueList.
             RefPtrWillBeRawPtr<CSSValue> textIndent = zoomAdjustedPixelValueForLength(style->textIndent(), *style);
-            if (RuntimeEnabledFeatures::css3TextEnabled() && style->textIndentLine() == TextIndentEachLine) {
+            if (RuntimeEnabledFeatures::css3TextEnabled() && (style->textIndentLine() == TextIndentEachLine || style->textIndentType() == TextIndentHanging)) {
                 RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
                 list->append(textIndent.release());
-                list->append(cssValuePool().createIdentifierValue(CSSValueEachLine));
+                if (style->textIndentLine() == TextIndentEachLine)
+                    list->append(cssValuePool().createIdentifierValue(CSSValueEachLine));
+                if (style->textIndentType() == TextIndentHanging)
+                    list->append(cssValuePool().createIdentifierValue(CSSValueHanging));
                 return list.release();
             }
             return textIndent.release();
         }
         case CSSPropertyTextShadow:
             return valueForShadowList(style->textShadow(), *style, false);
         case CSSPropertyTextRendering:
             return cssValuePool().createValue(style->fontDescription().textRendering());
         case CSSPropertyTextOverflow:
             if (style->textOverflow())
@@ skipping 807 matching lines @@
     static const CSSPropertyID propertiesAfterSlashSeperator[3] = { CSSPropertyBackgroundSize, CSSPropertyBackgroundOrigin,
                                                                     CSSPropertyBackgroundClip };
 
     RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createSlashSeparated();
     list->append(valuesForShorthandProperty(StylePropertyShorthand(CSSPropertyBackground, propertiesBeforeSlashSeperator, WTF_ARRAY_LENGTH(propertiesBeforeSlashSeperator))));
     list->append(valuesForShorthandProperty(StylePropertyShorthand(CSSPropertyBackground, propertiesAfterSlashSeperator, WTF_ARRAY_LENGTH(propertiesAfterSlashSeperator))));
     return list.release();
 }
 
 } // namespace WebCore