--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/rendering/SVGRenderSupport.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,95 @@
+/**
+ * Copyright (C) 2007 Rob Buis <buis@kde.org>
+ *           (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
+ *           (C) 2007 Eric Seidel <eric@webkit.org>
+ * Copyright (C) 2009 Google, Inc.  All rights reserved.
+ * Copyright (C) Research In Motion Limited 2010. All rights reserved.
+ *
+ * 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,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef SVGRenderSupport_h
+#define SVGRenderSupport_h
+
+#if ENABLE(SVG)
+#include "DashArray.h"
+#include "PaintInfo.h"
+
+namespace WebCore {
+
+class FloatPoint;
+class FloatRect;
+class ImageBuffer;
+class RenderBoxModelObject;
+class RenderObject;
+class RenderStyle;
+class TransformState;
+
+// SVGRendererSupport is a helper class sharing code between all SVG renderers.
+class SVGRenderSupport {
+public:
+    // Used by all SVG renderers who apply clip/filter/etc. resources to the renderer content
+    static bool prepareToRenderSVGContent(RenderObject*, PaintInfo&);
+    static void finishRenderSVGContent(RenderObject*, PaintInfo&, GraphicsContext* savedContext);
+
+    // Shares child layouting code between RenderSVGRoot/RenderSVG(Hidden)Container
+    static void layoutChildren(RenderObject*, bool selfNeedsLayout);
+
+    // Helper function determining wheter overflow is hidden
+    static bool isOverflowHidden(const RenderObject*);
+
+    // Calculates the repaintRect in combination with filter, clipper and masker in local coordinates.
+    static void intersectRepaintRectWithResources(const RenderObject*, FloatRect&);
+
+    // Determines whether the passed point lies in a clipping area
+    static bool pointInClippingArea(const RenderObject*, const FloatPoint&);
+
+    enum ContainerBoundingBoxMode {
+        ObjectBoundingBox,
+        StrokeBoundingBox,
+        RepaintBoundingBox
+    };
+
+    // Used to share the "walk all the children" logic between objectBoundingBox
+    // and repaintRectInLocalCoordinates in RenderSVGRoot and RenderSVGContainer
+    static FloatRect computeContainerBoundingBox(const RenderObject* container, ContainerBoundingBoxMode);
+
+    // Important functions used by nearly all SVG renderers centralizing coordinate transformations / repaint rect calculations
+    static IntRect clippedOverflowRectForRepaint(RenderObject*, RenderBoxModelObject* repaintContainer);
+    static void computeRectForRepaint(RenderObject*, RenderBoxModelObject* repaintContainer, IntRect&, bool fixed);
+    static void mapLocalToContainer(const RenderObject*, RenderBoxModelObject* repaintContainer, bool useTransforms, bool fixed, TransformState&);
+
+    // This offers a way to render parts of a WebKit rendering tree into a ImageBuffer.
+    static void renderSubtreeToImage(ImageBuffer*, RenderObject*);
+
+    // Shared between SVG renderers and resources.
+    static void applyStrokeStyleToContext(GraphicsContext*, const RenderStyle*, const RenderObject*);
+
+    // FIXME: These methods do not belong here.
+    static const RenderObject* findTextRootObject(const RenderObject* start);
+    static DashArray dashArrayFromRenderingStyle(const RenderStyle* style, RenderStyle* rootStyle);
+
+private:
+    // This class is not constructable.
+    SVGRenderSupport();
+    ~SVGRenderSupport();
+};
+
+} // namespace WebCore
+
+#endif // ENABLE(SVG)
+#endif // SVGRenderSupport_h