1/*
2 * Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB.  If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20#ifndef RenderSVGResourceMarker_h
21#define RenderSVGResourceMarker_h
22
23#if ENABLE(SVG)
24#include "FloatRect.h"
25#include "RenderObject.h"
26#include "RenderSVGResourceContainer.h"
27#include "SVGMarkerElement.h"
28#include "SVGStyledElement.h"
29
30#include <wtf/HashSet.h>
31
32namespace WebCore {
33
34class AffineTransform;
35
36class RenderSVGResourceMarker : public RenderSVGResourceContainer {
37public:
38    RenderSVGResourceMarker(SVGMarkerElement*);
39    virtual ~RenderSVGResourceMarker();
40
41    virtual const char* renderName() const { return "RenderSVGResourceMarker"; }
42
43    virtual void removeAllClientsFromCache(bool markForInvalidation = true);
44    virtual void removeClientFromCache(RenderObject*, bool markForInvalidation = true);
45
46    void draw(PaintInfo&, const AffineTransform&);
47
48    // Calculates marker boundaries, mapped to the target element's coordinate space
49    FloatRect markerBoundaries(const AffineTransform& markerTransformation) const;
50
51    virtual void applyViewportClip(PaintInfo&);
52    virtual void layout();
53    virtual void calcViewport();
54
55    virtual const AffineTransform& localToParentTransform() const;
56    AffineTransform markerTransformation(const FloatPoint& origin, float angle, float strokeWidth) const;
57
58    virtual bool applyResource(RenderObject*, RenderStyle*, GraphicsContext*&, unsigned short) { return false; }
59    virtual FloatRect resourceBoundingBox(RenderObject*) { return FloatRect(); }
60
61    FloatPoint referencePoint() const;
62    float angle() const;
63    SVGMarkerElement::SVGMarkerUnitsType markerUnits() const { return static_cast<SVGMarkerElement::SVGMarkerUnitsType>(static_cast<SVGMarkerElement*>(node())->markerUnits()); }
64
65    virtual RenderSVGResourceType resourceType() const { return s_resourceType; }
66    static RenderSVGResourceType s_resourceType;
67
68private:
69    // Generates a transformation matrix usable to render marker content. Handles scaling the marker content
70    // acording to SVGs markerUnits="strokeWidth" concept, when a strokeWidth value != -1 is passed in.
71    AffineTransform markerContentTransformation(const AffineTransform& contentTransformation, const FloatPoint& origin, float strokeWidth = -1) const;
72
73    AffineTransform viewportTransform() const;
74
75    mutable AffineTransform m_localToParentTransform;
76    FloatRect m_viewport;
77};
78
79}
80#endif
81
82#endif
83