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/*
Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
2004, 2005, 2007 Rob Buis <buis@kde.org>
2007 Eric Seidel <eric@webkit.org>
2009 Google, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
aint with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "config.h"
#if ENABLE(SVG)
#include "RenderSVGViewportContainer.h"
#include "GraphicsContext.h"
#include "RenderView.h"
#include "SVGMarkerElement.h"
#include "SVGSVGElement.h"
namespace WebCore {
RenderSVGViewportContainer::RenderSVGViewportContainer(SVGStyledElement* node)
: RenderSVGContainer(node)
{
}
void RenderSVGViewportContainer::paint(PaintInfo& paintInfo, int parentX, int parentY)
{
// FIXME: The if statement here evaluates to false. isEmpty() is exactly the same
// as what is on the right side, so it's basically !isEmpty && isEmpty. So this
// function does nothing.
// A value of zero disables rendering of the element.
if (!m_viewport.isEmpty() && (m_viewport.width() <= 0. || m_viewport.height() <= 0.))
return;
RenderSVGContainer::paint(paintInfo, parentX, parentY);
}
void RenderSVGViewportContainer::applyViewportClip(PaintInfo& paintInfo)
{
if (style()->overflowX() != OVISIBLE)
paintInfo.context->clip(enclosingIntRect(m_viewport)); // FIXME: Eventually we'll want float-precision clipping
}
void RenderSVGViewportContainer::calcViewport()
{
SVGElement* svgelem = static_cast<SVGElement*>(node());
if (svgelem->hasTagName(SVGNames::svgTag)) {
SVGSVGElement* svg = static_cast<SVGSVGElement*>(node());
if (!selfNeedsLayout() && !svg->hasRelativeValues())
return;
float x = svg->x().value(svg);
float y = svg->y().value(svg);
float w = svg->width().value(svg);
float h = svg->height().value(svg);
m_viewport = FloatRect(x, y, w, h);
} else if (svgelem->hasTagName(SVGNames::markerTag)) {
if (!selfNeedsLayout())
return;
SVGMarkerElement* svg = static_cast<SVGMarkerElement*>(node());
float w = svg->markerWidth().value(svg);
float h = svg->markerHeight().value(svg);
m_viewport = FloatRect(0, 0, w, h);
}
}
TransformationMatrix RenderSVGViewportContainer::viewportTransform() const
{
if (node()->hasTagName(SVGNames::svgTag)) {
SVGSVGElement* svg = static_cast<SVGSVGElement*>(node());
return svg->viewBoxToViewTransform(m_viewport.width(), m_viewport.height());
} else if (node()->hasTagName(SVGNames::markerTag)) {
SVGMarkerElement* marker = static_cast<SVGMarkerElement*>(node());
return marker->viewBoxToViewTransform(m_viewport.width(), m_viewport.height());
}
return TransformationMatrix();
}
TransformationMatrix RenderSVGViewportContainer::localToParentTransform() const
{
TransformationMatrix viewportTranslation;
viewportTranslation.translate(m_viewport.x(), m_viewport.y());
return viewportTransform() * viewportTranslation;
// If this class were ever given a localTransform(), then the above would read:
// return viewportTransform() * localTransform() * viewportTranslation;
}
// FIXME: This method should be removed as soon as callers to RenderBox::absoluteTransform() can be removed.
TransformationMatrix RenderSVGViewportContainer::absoluteTransform() const
{
// This would apply localTransform() twice if localTransform() were not the identity.
return localToParentTransform() * RenderSVGContainer::absoluteTransform();
}
bool RenderSVGViewportContainer::pointIsInsideViewportClip(const FloatPoint& pointInParent)
{
// Respect the viewport clip (which is in parent coords). SVG does not support separate x/y overflow rules.
if (style()->overflowX() == OHIDDEN) {
ASSERT(style()->overflowY() == OHIDDEN);
if (!m_viewport.contains(pointInParent))
return false;
}
return true;
}
}
#endif // ENABLE(SVG)
// vim:ts=4:noet
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