Support 'paint-order' from SVG2.

Source/core/css/SVGCSSComputedStyleDeclaration.cpp

 /*
     Copyright (C) 2007 Eric Seidel <eric@webkit.org>
     Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
 
     This library is distributed in the hope that it will be useful,
@@ skipping 41 matching lines @@
         return CSSPrimitiveValue::createIdentifier(CSSValueNone);
 
     RefPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
     const Vector<SVGLength>::const_iterator end = dashes.end();
     for (Vector<SVGLength>::const_iterator it = dashes.begin(); it != end; ++it)
         list->append(SVGLength::toCSSPrimitiveValue(*it));
 
     return list.release();
 }
 
+static PassRefPtr<CSSValue> paintOrderToCSSValueList(EPaintOrder paintorder)
+{
+    RefPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
+    do {
+        EPaintOrderType paintOrderType = (EPaintOrderType)(paintorder & ((1 << kPaintOrderBitwidth) - 1));
+        switch (paintOrderType) {
+        case PT_FILL:
+        case PT_STROKE:
+        case PT_MARKERS:
+            list->append(CSSPrimitiveValue::create(paintOrderType));
+            break;
+        case PT_NONE:
+        default:
+            ASSERT_NOT_REACHED();
+            break;
+        }
+    } while (paintorder >>= kPaintOrderBitwidth);
+
+    return list.release();
+}
+
 PassRefPtr<SVGPaint> CSSComputedStyleDeclaration::adjustSVGPaintForCurrentColor(PassRefPtr<SVGPaint> newPaint, RenderStyle* style) const
 {
     RefPtr<SVGPaint> paint = newPaint;
     if (paint->paintType() == SVGPaint::SVG_PAINTTYPE_CURRENTCOLOR || paint->paintType() == SVGPaint::SVG_PAINTTYPE_URI_CURRENTCOLOR)
         paint->setColor(style->color());
     return paint.release();
 }
 
 PassRefPtr<CSSValue> CSSComputedStyleDeclaration::getSVGPropertyCSSValue(CSSPropertyID propertyID, EUpdateLayout updateLayout) const
 {
@@ skipping 112 matching lines @@
             if (RefPtr<CSSPrimitiveValue> value = glyphOrientationToCSSPrimitiveValue(svgStyle->glyphOrientationVertical()))
                 return value.release();
 
             if (svgStyle->glyphOrientationVertical() == GO_AUTO)
                 return CSSPrimitiveValue::createIdentifier(CSSValueAuto);
 
             return 0;
         }
         case CSSPropertyWebkitSvgShadow:
             return valueForShadow(svgStyle->shadow(), propertyID, style);
+        case CSSPropertyPaintOrder:
+            return paintOrderToCSSValueList(svgStyle->paintOrder());
         case CSSPropertyVectorEffect:
             return CSSPrimitiveValue::create(svgStyle->vectorEffect());
         case CSSPropertyMaskType:
             return CSSPrimitiveValue::create(svgStyle->maskType());
         case CSSPropertyMarker:
         case CSSPropertyEnableBackground:
         case CSSPropertyColorProfile:
             // the above properties are not yet implemented in the engine
             break;
     default:
         // If you crash here, it's because you added a css property and are not handling it
         // in either this switch statement or the one in CSSComputedStyleDelcaration::getPropertyCSSValue
         ASSERT_WITH_MESSAGE(0, "unimplemented propertyID: %d", propertyID);
     }
     LOG_ERROR("unimplemented propertyID: %d", propertyID);
     return 0;
 }
 
 }