1/*
2    Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
3                  2004, 2005, 2007 Rob Buis <buis@kde.org>
4                  2009 Google, Inc.
5    Copyright (C) 2009 Apple Inc. All rights reserved.
6
7    This library is free software; you can redistribute it and/or
8    modify it under the terms of the GNU Library General Public
9    License as published by the Free Software Foundation; either
10    version 2 of the License, or (at your option) any later version.
11
12    This library is distributed in the hope that it will be useful,
13    but WITHOUT ANY WARRANTY; without even the implied warranty of
14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15    Library General Public License for more details.
16
17    You should have received a copy of the GNU Library General Public License
18    aint with this library; see the file COPYING.LIB.  If not, write to
19    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20    Boston, MA 02110-1301, USA.
21*/
22
23#ifndef RenderSVGViewportContainer_h
24#define RenderSVGViewportContainer_h
25
26#if ENABLE(SVG)
27#include "RenderSVGContainer.h"
28
29namespace WebCore {
30
31// This is used for non-root <svg> elements and <marker> elements, neither of which are SVGTransformable
32// thus we inherit from RenderSVGContainer instead of RenderSVGTransformableContainer
33class RenderSVGViewportContainer : public RenderSVGContainer {
34public:
35    RenderSVGViewportContainer(SVGStyledElement*);
36
37    // Calculates marker boundaries, mapped to the target element's coordinate space
38    FloatRect markerBoundaries(const AffineTransform& markerTransformation) const;
39
40    // Generates a transformation matrix usable to render marker content. Handles scaling the marker content
41    // acording to SVGs markerUnits="strokeWidth" concept, when a strokeWidth value != -1 is passed in.
42    AffineTransform markerContentTransformation(const AffineTransform& contentTransformation, const FloatPoint& origin, float strokeWidth = -1) const;
43
44private:
45    virtual bool isSVGContainer() const { return true; }
46    virtual const char* renderName() const { return "RenderSVGViewportContainer"; }
47
48    AffineTransform viewportTransform() const;
49    virtual const AffineTransform& localToParentTransform() const;
50
51    virtual void calcViewport();
52
53    virtual void applyViewportClip(PaintInfo&);
54    virtual bool pointIsInsideViewportClip(const FloatPoint& pointInParent);
55
56    FloatRect m_viewport;
57    mutable AffineTransform m_localToParentTransform;
58};
59
60inline RenderSVGViewportContainer* toRenderSVGViewportContainer(RenderObject* object)
61{
62    ASSERT(!object || !strcmp(object->renderName(), "RenderSVGViewportContainer"));
63    return static_cast<RenderSVGViewportContainer*>(object);
64}
65
66// This will catch anyone doing an unnecessary cast.
67void toRenderSVGViewportContainer(const RenderSVGViewportContainer*);
68
69} // namespace WebCore
70
71#endif // ENABLE(SVG)
72#endif // RenderSVGViewportContainer_h
73