1 /*
2 Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
3 2004, 2005, 2007 Rob Buis <buis@kde.org>
4 2007 Eric Seidel <eric@webkit.org>
5 2009 Google, Inc.
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 #include "config.h"
24
25 #if ENABLE(SVG)
26 #include "RenderSVGViewportContainer.h"
27
28 #include "GraphicsContext.h"
29
30 #include "RenderView.h"
31 #include "SVGMarkerElement.h"
32 #include "SVGSVGElement.h"
33
34 namespace WebCore {
35
RenderSVGViewportContainer(SVGStyledElement * node)36 RenderSVGViewportContainer::RenderSVGViewportContainer(SVGStyledElement* node)
37 : RenderSVGContainer(node)
38 {
39 }
40
markerBoundaries(const AffineTransform & markerTransformation) const41 FloatRect RenderSVGViewportContainer::markerBoundaries(const AffineTransform& markerTransformation) const
42 {
43 FloatRect coordinates = repaintRectInLocalCoordinates();
44
45 // Map repaint rect into parent coordinate space, in which the marker boundaries have to be evaluated
46 coordinates = localToParentTransform().mapRect(coordinates);
47
48 return markerTransformation.mapRect(coordinates);
49 }
50
markerContentTransformation(const AffineTransform & contentTransformation,const FloatPoint & origin,float strokeWidth) const51 AffineTransform RenderSVGViewportContainer::markerContentTransformation(const AffineTransform& contentTransformation, const FloatPoint& origin, float strokeWidth) const
52 {
53 // The 'origin' coordinate maps to SVGs refX/refY, given in coordinates relative to the viewport established by the marker
54 FloatPoint mappedOrigin = viewportTransform().mapPoint(origin);
55
56 AffineTransform transformation = contentTransformation;
57 if (strokeWidth != -1)
58 transformation.scaleNonUniform(strokeWidth, strokeWidth);
59
60 transformation.translate(-mappedOrigin.x(), -mappedOrigin.y());
61 return transformation;
62 }
63
applyViewportClip(PaintInfo & paintInfo)64 void RenderSVGViewportContainer::applyViewportClip(PaintInfo& paintInfo)
65 {
66 if (SVGRenderBase::isOverflowHidden(this))
67 paintInfo.context->clip(m_viewport);
68 }
69
calcViewport()70 void RenderSVGViewportContainer::calcViewport()
71 {
72 SVGElement* svgelem = static_cast<SVGElement*>(node());
73 if (svgelem->hasTagName(SVGNames::svgTag)) {
74 SVGSVGElement* svg = static_cast<SVGSVGElement*>(node());
75
76 if (!selfNeedsLayout() && !svg->hasRelativeValues())
77 return;
78
79 float x = svg->x().value(svg);
80 float y = svg->y().value(svg);
81 float w = svg->width().value(svg);
82 float h = svg->height().value(svg);
83 m_viewport = FloatRect(x, y, w, h);
84 } else if (svgelem->hasTagName(SVGNames::markerTag)) {
85 if (!selfNeedsLayout())
86 return;
87
88 SVGMarkerElement* svg = static_cast<SVGMarkerElement*>(node());
89 float w = svg->markerWidth().value(svg);
90 float h = svg->markerHeight().value(svg);
91 m_viewport = FloatRect(0, 0, w, h);
92 }
93 }
94
viewportTransform() const95 AffineTransform RenderSVGViewportContainer::viewportTransform() const
96 {
97 if (node()->hasTagName(SVGNames::svgTag)) {
98 SVGSVGElement* svg = static_cast<SVGSVGElement*>(node());
99 return svg->viewBoxToViewTransform(m_viewport.width(), m_viewport.height());
100 } else if (node()->hasTagName(SVGNames::markerTag)) {
101 SVGMarkerElement* marker = static_cast<SVGMarkerElement*>(node());
102 return marker->viewBoxToViewTransform(m_viewport.width(), m_viewport.height());
103 }
104
105 return AffineTransform();
106 }
107
localToParentTransform() const108 const AffineTransform& RenderSVGViewportContainer::localToParentTransform() const
109 {
110 AffineTransform viewportTranslation(viewportTransform());
111 m_localToParentTransform = viewportTranslation.translateRight(m_viewport.x(), m_viewport.y());
112 return m_localToParentTransform;
113 // If this class were ever given a localTransform(), then the above would read:
114 // return viewportTransform() * localTransform() * viewportTranslation;
115 }
116
pointIsInsideViewportClip(const FloatPoint & pointInParent)117 bool RenderSVGViewportContainer::pointIsInsideViewportClip(const FloatPoint& pointInParent)
118 {
119 // Respect the viewport clip (which is in parent coords)
120 if (!SVGRenderBase::isOverflowHidden(this))
121 return true;
122
123 return m_viewport.contains(pointInParent);
124 }
125
126 }
127
128 #endif // ENABLE(SVG)
129