[CSS Shapes] Basic shapes' computed position should be a horizontal and vertical offset

Source/core/rendering/style/BasicShapes.cpp

 /*
  * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above
  *    copyright notice, this list of conditions and the following
  *    disclaimer.
@@ skipping 13 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
  * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/rendering/style/BasicShapes.h"
 
 #include "core/css/BasicShapeFunctions.h"
+#include "platform/CalculationValue.h"
 #include "platform/LengthFunctions.h"
 #include "platform/geometry/FloatRect.h"
 #include "platform/graphics/Path.h"
 
 namespace WebCore {
 
+void BasicShapeCenterCoordinate::updateComputedLength()
+{
+    if (m_direction == TopLeft) {
+        m_computedLength = m_length.isUndefined() ? Length(0, Fixed) : m_length;
+        return;
+    }
+    if (m_length.isUndefined()) {
+        m_computedLength = Length(100, Percent);
+        return;
+    }
+
+    OwnPtr<CalcExpressionLength> lhs = adoptPtr(new CalcExpressionLength(Length(100, Percent)));
+    OwnPtr<CalcExpressionLength> rhs = adoptPtr(new CalcExpressionLength(m_length));
+    OwnPtr<CalcExpressionBinaryOperation> op = adoptPtr(new CalcExpressionBinaryOperation(lhs.release(), rhs.release(), CalcSubtract));
+    m_computedLength = Length(CalculationValue::create(op.release(), ValueRangeAll));
+}
+
 bool BasicShape::canBlend(const BasicShape* other) const
 {
     // FIXME: Support animations between different shapes in the future.
     if (!other || !isSameType(*other))
         return false;
 
     // Just polygons with same number of vertices can be animated.
     if (type() == BasicShape::BasicShapePolygonType
         && (static_cast<const BasicShapePolygon*>(this)->values().size() != static_cast<const BasicShapePolygon*>(other)->values().size()
         || static_cast<const BasicShapePolygon*>(this)->windRule() != static_cast<const BasicShapePolygon*>(other)->windRule()))
         return false;
 
     // Circles with keywords for radii or center coordinates cannot be animated.
     if (type() == BasicShape::BasicShapeCircleType) {
         const BasicShapeCircle* thisCircle = static_cast<const BasicShapeCircle*>(this);
         const BasicShapeCircle* otherCircle = static_cast<const BasicShapeCircle*>(other);
-        if (!thisCircle->radius().canBlend(otherCircle->radius())
-            || !thisCircle->centerX().canBlend(otherCircle->centerX())
-            || !thisCircle->centerY().canBlend(otherCircle->centerY()))
+        if (!thisCircle->radius().canBlend(otherCircle->radius()))
             return false;
     }
 
     // Ellipses with keywords for radii or center coordinates cannot be animated.
     if (type() != BasicShape::BasicShapeEllipseType)
         return true;
 
     const BasicShapeEllipse* thisEllipse = static_cast<const BasicShapeEllipse*>(this);
     const BasicShapeEllipse* otherEllipse = static_cast<const BasicShapeEllipse*>(other);
     return (thisEllipse->radiusX().canBlend(otherEllipse->radiusX())
-        && thisEllipse->radiusY().canBlend(otherEllipse->radiusY())
-        && thisEllipse->centerX().canBlend(otherEllipse->centerX())
-        && thisEllipse->centerY().canBlend(otherEllipse->centerY()));
+        && thisEllipse->radiusY().canBlend(otherEllipse->radiusY()));
 }
 
 void BasicShapeRectangle::path(Path& path, const FloatRect& boundingBox)
 {
     ASSERT(path.isEmpty());
     path.addRoundedRect(
         FloatRect(
             floatValueForLength(m_x, boundingBox.width()) + boundingBox.x(),
             floatValueForLength(m_y, boundingBox.height()) + boundingBox.y(),
             floatValueForLength(m_width, boundingBox.width()),
@@ skipping 335 matching lines @@
         && m_top == other.m_top
         && m_bottom == other.m_bottom
         && m_left == other.m_left
         && m_topLeftRadius == other.m_topLeftRadius
         && m_topRightRadius == other.m_topRightRadius
         && m_bottomRightRadius == other.m_bottomRightRadius
         && m_bottomLeftRadius == other.m_bottomLeftRadius;
 }
 
 }