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#include "RenderSVGResourceContainer.h"
24#include "SVGMarkerElement.h"
25
26#include <wtf/HashSet.h>
27
28namespace WebCore {
29
30class AffineTransform;
31class RenderObject;
32
33class RenderSVGResourceMarker final : public RenderSVGResourceContainer {
34public:
35    RenderSVGResourceMarker(SVGMarkerElement&, PassRef<RenderStyle>);
36    virtual ~RenderSVGResourceMarker();
37
38    SVGMarkerElement& markerElement() const { return toSVGMarkerElement(RenderSVGResourceContainer::element()); }
39
40    virtual void removeAllClientsFromCache(bool markForInvalidation = true) override;
41    virtual void removeClientFromCache(RenderElement&, bool markForInvalidation = true) override;
42
43    void draw(PaintInfo&, const AffineTransform&);
44
45    // Calculates marker boundaries, mapped to the target element's coordinate space
46    FloatRect markerBoundaries(const AffineTransform& markerTransformation) const;
47
48    virtual void applyViewportClip(PaintInfo&);
49    virtual void layout();
50    virtual void calcViewport();
51
52    virtual const AffineTransform& localToParentTransform() const;
53    AffineTransform markerTransformation(const FloatPoint& origin, float angle, float strokeWidth) const;
54
55    virtual bool applyResource(RenderElement&, const RenderStyle&, GraphicsContext*&, unsigned short) override { return false; }
56    virtual FloatRect resourceBoundingBox(const RenderObject&) override { return FloatRect(); }
57
58    FloatPoint referencePoint() const;
59    float angle() const;
60    SVGMarkerUnitsType markerUnits() const { return markerElement().markerUnits(); }
61
62    virtual RenderSVGResourceType resourceType() const { return s_resourceType; }
63    static RenderSVGResourceType s_resourceType;
64
65private:
66    void element() const = delete;
67
68    virtual const char* renderName() const override { return "RenderSVGResourceMarker"; }
69
70    // Generates a transformation matrix usable to render marker content. Handles scaling the marker content
71    // acording to SVGs markerUnits="strokeWidth" concept, when a strokeWidth value != -1 is passed in.
72    AffineTransform markerContentTransformation(const AffineTransform& contentTransformation, const FloatPoint& origin, float strokeWidth = -1) const;
73
74    AffineTransform viewportTransform() const;
75
76    mutable AffineTransform m_localToParentTransform;
77    FloatRect m_viewport;
78};
79
80}
81
82#endif
83