1 /*
2 * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
3 * Copyright (C) 2004, 2005, 2007 Rob Buis <buis@kde.org>
4 * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
5 * Copyright (C) 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 * along 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 #include "core/rendering/svg/RenderSVGViewportContainer.h"
25
26 #include "core/rendering/PaintInfo.h"
27 #include "core/rendering/svg/SVGRenderSupport.h"
28 #include "core/svg/SVGSVGElement.h"
29 #include "core/svg/SVGUseElement.h"
30 #include "platform/graphics/GraphicsContext.h"
31
32 namespace WebCore {
33
RenderSVGViewportContainer(SVGElement * node)34 RenderSVGViewportContainer::RenderSVGViewportContainer(SVGElement* node)
35 : RenderSVGContainer(node)
36 , m_didTransformToRootUpdate(false)
37 , m_isLayoutSizeChanged(false)
38 , m_needsTransformUpdate(true)
39 {
40 }
41
determineIfLayoutSizeChanged()42 void RenderSVGViewportContainer::determineIfLayoutSizeChanged()
43 {
44 ASSERT(element());
45 if (!isSVGSVGElement(*element()))
46 return;
47
48 m_isLayoutSizeChanged = toSVGSVGElement(element())->hasRelativeLengths() && selfNeedsLayout();
49 }
50
applyViewportClip(PaintInfo & paintInfo)51 void RenderSVGViewportContainer::applyViewportClip(PaintInfo& paintInfo)
52 {
53 if (SVGRenderSupport::isOverflowHidden(this))
54 paintInfo.context->clip(m_viewport);
55 }
56
calcViewport()57 void RenderSVGViewportContainer::calcViewport()
58 {
59 SVGElement* element = this->element();
60 ASSERT(element);
61 if (!isSVGSVGElement(*element))
62 return;
63 SVGSVGElement* svg = toSVGSVGElement(element);
64 FloatRect oldViewport = m_viewport;
65
66 SVGLengthContext lengthContext(element);
67 m_viewport = FloatRect(svg->x()->currentValue()->value(lengthContext), svg->y()->currentValue()->value(lengthContext), svg->width()->currentValue()->value(lengthContext), svg->height()->currentValue()->value(lengthContext));
68
69 if (oldViewport != m_viewport) {
70 setNeedsBoundariesUpdate();
71 setNeedsTransformUpdate();
72 }
73 }
74
calculateLocalTransform()75 bool RenderSVGViewportContainer::calculateLocalTransform()
76 {
77 m_didTransformToRootUpdate = m_needsTransformUpdate || SVGRenderSupport::transformToRootChanged(parent());
78 if (!m_needsTransformUpdate)
79 return false;
80
81 m_localToParentTransform = AffineTransform::translation(m_viewport.x(), m_viewport.y()) * viewportTransform();
82 m_needsTransformUpdate = false;
83 return true;
84 }
85
viewportTransform() const86 AffineTransform RenderSVGViewportContainer::viewportTransform() const
87 {
88 ASSERT(element());
89 if (isSVGSVGElement(*element())) {
90 SVGSVGElement* svg = toSVGSVGElement(element());
91 return svg->viewBoxToViewTransform(m_viewport.width(), m_viewport.height());
92 }
93
94 return AffineTransform();
95 }
96
pointIsInsideViewportClip(const FloatPoint & pointInParent)97 bool RenderSVGViewportContainer::pointIsInsideViewportClip(const FloatPoint& pointInParent)
98 {
99 // Respect the viewport clip (which is in parent coords)
100 if (!SVGRenderSupport::isOverflowHidden(this))
101 return true;
102
103 return m_viewport.contains(pointInParent);
104 }
105
paint(PaintInfo & paintInfo,const LayoutPoint & paintOffset)106 void RenderSVGViewportContainer::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
107 {
108 ASSERT(element());
109 // An empty viewBox disables rendering.
110 if (isSVGSVGElement(*element()) && toSVGSVGElement(*element()).hasEmptyViewBox())
111 return;
112
113 RenderSVGContainer::paint(paintInfo, paintOffset);
114 }
115
116 }
117