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 "RenderSVGViewportContainer.h"
25
26#include "GraphicsContext.h"
27#include "RenderView.h"
28#include "SVGSVGElement.h"
29#include <wtf/IsoMallocInlines.h>
30
31namespace WebCore {
32
33WTF_MAKE_ISO_ALLOCATED_IMPL(RenderSVGViewportContainer);
34
35RenderSVGViewportContainer::RenderSVGViewportContainer(SVGSVGElement& element, RenderStyle&& style)
36 : RenderSVGContainer(element, WTFMove(style))
37 , m_didTransformToRootUpdate(false)
38 , m_isLayoutSizeChanged(false)
39 , m_needsTransformUpdate(true)
40{
41}
42
43SVGSVGElement& RenderSVGViewportContainer::svgSVGElement() const
44{
45 return downcast<SVGSVGElement>(RenderSVGContainer::element());
46}
47
48void RenderSVGViewportContainer::determineIfLayoutSizeChanged()
49{
50 m_isLayoutSizeChanged = svgSVGElement().hasRelativeLengths() && selfNeedsLayout();
51}
52
53void RenderSVGViewportContainer::applyViewportClip(PaintInfo& paintInfo)
54{
55 if (SVGRenderSupport::isOverflowHidden(*this))
56 paintInfo.context().clip(m_viewport);
57}
58
59void RenderSVGViewportContainer::calcViewport()
60{
61 SVGSVGElement& element = svgSVGElement();
62 SVGLengthContext lengthContext(&element);
63 FloatRect newViewport(element.x().value(lengthContext), element.y().value(lengthContext), element.width().value(lengthContext), element.height().value(lengthContext));
64
65 if (m_viewport == newViewport)
66 return;
67
68 m_viewport = newViewport;
69
70 setNeedsBoundariesUpdate();
71 setNeedsTransformUpdate();
72}
73
74bool RenderSVGViewportContainer::calculateLocalTransform()
75{
76 m_didTransformToRootUpdate = m_needsTransformUpdate || SVGRenderSupport::transformToRootChanged(parent());
77 if (!m_needsTransformUpdate)
78 return false;
79
80 m_localToParentTransform = AffineTransform::translation(m_viewport.x(), m_viewport.y()) * viewportTransform();
81 m_needsTransformUpdate = false;
82 return true;
83}
84
85AffineTransform RenderSVGViewportContainer::viewportTransform() const
86{
87 return svgSVGElement().viewBoxToViewTransform(m_viewport.width(), m_viewport.height());
88}
89
90bool RenderSVGViewportContainer::pointIsInsideViewportClip(const FloatPoint& pointInParent)
91{
92 // Respect the viewport clip (which is in parent coords)
93 if (!SVGRenderSupport::isOverflowHidden(*this))
94 return true;
95
96 return m_viewport.contains(pointInParent);
97}
98
99void RenderSVGViewportContainer::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
100{
101 // An empty viewBox disables rendering.
102 if (svgSVGElement().hasEmptyViewBox())
103 return;
104
105 RenderSVGContainer::paint(paintInfo, paintOffset);
106}
107
108}
109