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
paint(PaintInfo & paintInfo,int parentX,int parentY)41 void RenderSVGViewportContainer::paint(PaintInfo& paintInfo, int parentX, int parentY)
42 {
43 // FIXME: The if statement here evaluates to false. isEmpty() is exactly the same
44 // as what is on the right side, so it's basically !isEmpty && isEmpty. So this
45 // function does nothing.
46
47 // A value of zero disables rendering of the element.
48 if (!m_viewport.isEmpty() && (m_viewport.width() <= 0. || m_viewport.height() <= 0.))
49 return;
50
51 RenderSVGContainer::paint(paintInfo, parentX, parentY);
52 }
53
applyViewportClip(PaintInfo & paintInfo)54 void RenderSVGViewportContainer::applyViewportClip(PaintInfo& paintInfo)
55 {
56 if (style()->overflowX() != OVISIBLE)
57 paintInfo.context->clip(enclosingIntRect(m_viewport)); // FIXME: Eventually we'll want float-precision clipping
58 }
59
calcViewport()60 void RenderSVGViewportContainer::calcViewport()
61 {
62 SVGElement* svgelem = static_cast<SVGElement*>(node());
63 if (svgelem->hasTagName(SVGNames::svgTag)) {
64 SVGSVGElement* svg = static_cast<SVGSVGElement*>(node());
65
66 if (!selfNeedsLayout() && !svg->hasRelativeValues())
67 return;
68
69 float x = svg->x().value(svg);
70 float y = svg->y().value(svg);
71 float w = svg->width().value(svg);
72 float h = svg->height().value(svg);
73 m_viewport = FloatRect(x, y, w, h);
74 } else if (svgelem->hasTagName(SVGNames::markerTag)) {
75 if (!selfNeedsLayout())
76 return;
77
78 SVGMarkerElement* svg = static_cast<SVGMarkerElement*>(node());
79 float w = svg->markerWidth().value(svg);
80 float h = svg->markerHeight().value(svg);
81 m_viewport = FloatRect(0, 0, w, h);
82 }
83 }
84
viewportTransform() const85 TransformationMatrix RenderSVGViewportContainer::viewportTransform() const
86 {
87 if (node()->hasTagName(SVGNames::svgTag)) {
88 SVGSVGElement* svg = static_cast<SVGSVGElement*>(node());
89 return svg->viewBoxToViewTransform(m_viewport.width(), m_viewport.height());
90 } else if (node()->hasTagName(SVGNames::markerTag)) {
91 SVGMarkerElement* marker = static_cast<SVGMarkerElement*>(node());
92 return marker->viewBoxToViewTransform(m_viewport.width(), m_viewport.height());
93 }
94
95 return TransformationMatrix();
96 }
97
localToParentTransform() const98 TransformationMatrix RenderSVGViewportContainer::localToParentTransform() const
99 {
100 TransformationMatrix viewportTranslation;
101 viewportTranslation.translate(m_viewport.x(), m_viewport.y());
102 return viewportTransform() * viewportTranslation;
103 // If this class were ever given a localTransform(), then the above would read:
104 // return viewportTransform() * localTransform() * viewportTranslation;
105 }
106
107 // FIXME: This method should be removed as soon as callers to RenderBox::absoluteTransform() can be removed.
absoluteTransform() const108 TransformationMatrix RenderSVGViewportContainer::absoluteTransform() const
109 {
110 // This would apply localTransform() twice if localTransform() were not the identity.
111 return localToParentTransform() * RenderSVGContainer::absoluteTransform();
112 }
113
pointIsInsideViewportClip(const FloatPoint & pointInParent)114 bool RenderSVGViewportContainer::pointIsInsideViewportClip(const FloatPoint& pointInParent)
115 {
116 // Respect the viewport clip (which is in parent coords). SVG does not support separate x/y overflow rules.
117 if (style()->overflowX() == OHIDDEN) {
118 ASSERT(style()->overflowY() == OHIDDEN);
119 if (!m_viewport.contains(pointInParent))
120 return false;
121 }
122 return true;
123 }
124
125 }
126
127 #endif // ENABLE(SVG)
128
129 // vim:ts=4:noet
130