2 * Copyright (C) 2007 Rob Buis <buis@kde.org>
3 * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
4 * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
5 * Copyright (C) 2009 Google, Inc. All rights reserved.
6 * Copyright (C) Research In Motion Limited 2010. All rights reserved.
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public License
19 * along with this library; see the file COPYING.LIB. If not, write to
20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
24 #ifndef SVGRenderSupport_h
25 #define SVGRenderSupport_h
28 #include "LayoutTypes.h"
29 #include "PaintInfo.h"
36 class RenderBoxModelObject;
42 // SVGRendererSupport is a helper class sharing code between all SVG renderers.
43 class SVGRenderSupport {
45 // Used by all SVG renderers who apply clip/filter/etc. resources to the renderer content
46 static bool prepareToRenderSVGContent(RenderObject*, PaintInfo&);
47 static void finishRenderSVGContent(RenderObject*, PaintInfo&, GraphicsContext* savedContext);
49 // Shares child layouting code between RenderSVGRoot/RenderSVG(Hidden)Container
50 static void layoutChildren(RenderObject*, bool selfNeedsLayout);
52 // Helper function determining wheter overflow is hidden
53 static bool isOverflowHidden(const RenderObject*);
55 // Calculates the repaintRect in combination with filter, clipper and masker in local coordinates.
56 static void intersectRepaintRectWithResources(const RenderObject*, FloatRect&);
58 // Determines whether a container needs to be laid out because it's filtered and a child is being laid out.
59 static bool filtersForceContainerLayout(RenderObject*);
61 // Determines whether the passed point lies in a clipping area
62 static bool pointInClippingArea(RenderObject*, const FloatPoint&);
64 static void computeContainerBoundingBoxes(const RenderObject* container, FloatRect& objectBoundingBox, FloatRect& strokeBoundingBox, FloatRect& repaintBoundingBox);
65 static bool paintInfoIntersectsRepaintRect(const FloatRect& localRepaintRect, const AffineTransform& localTransform, const PaintInfo&);
67 // Important functions used by nearly all SVG renderers centralizing coordinate transformations / repaint rect calculations
68 static LayoutRect clippedOverflowRectForRepaint(const RenderObject*, RenderBoxModelObject* repaintContainer);
69 static void computeFloatRectForRepaint(const RenderObject*, RenderBoxModelObject* repaintContainer, FloatRect&, bool fixed);
70 static void mapLocalToContainer(const RenderObject*, RenderBoxModelObject* repaintContainer, TransformState&, bool* wasFixed = 0);
72 // Shared between SVG renderers and resources.
73 static void applyStrokeStyleToContext(GraphicsContext*, const RenderStyle*, const RenderObject*);
75 // FIXME: These methods do not belong here.
76 static const RenderSVGRoot* findTreeRootObject(const RenderObject*);
79 // This class is not constructable.
84 } // namespace WebCore
87 #endif // SVGRenderSupport_h