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/*
* Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2007, 2008 Rob Buis <buis@kde.org>
* Copyright (C) 2007 Eric Seidel <eric@webkit.org>
* Copyright (C) 2009 Google, Inc. All rights reserved.
* Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
*
* 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
* along 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"
#include "core/rendering/svg/RenderSVGContainer.h"
#include "core/frame/Settings.h"
#include "core/rendering/GraphicsContextAnnotator.h"
#include "core/rendering/LayoutRepainter.h"
#include "core/rendering/RenderView.h"
#include "core/rendering/svg/SVGRenderSupport.h"
#include "core/rendering/svg/SVGRenderingContext.h"
#include "core/rendering/svg/SVGResources.h"
#include "core/rendering/svg/SVGResourcesCache.h"
#include "platform/graphics/GraphicsContextCullSaver.h"
#include "platform/graphics/GraphicsContextStateSaver.h"
namespace WebCore {
RenderSVGContainer::RenderSVGContainer(SVGElement* node)
: RenderSVGModelObject(node)
, m_objectBoundingBoxValid(false)
, m_needsBoundariesUpdate(true)
{
}
RenderSVGContainer::~RenderSVGContainer()
{
}
void RenderSVGContainer::layout()
{
ASSERT(needsLayout());
// RenderSVGRoot disables layoutState for the SVG rendering tree.
ASSERT(!view()->layoutStateCachedOffsetsEnabled());
LayoutRepainter repainter(*this, SVGRenderSupport::checkForSVGRepaintDuringLayout(this) || selfWillPaint());
// Allow RenderSVGViewportContainer to update its viewport.
calcViewport();
// Allow RenderSVGTransformableContainer to update its transform.
bool updatedTransform = calculateLocalTransform();
// RenderSVGViewportContainer needs to set the 'layout size changed' flag.
determineIfLayoutSizeChanged();
SVGRenderSupport::layoutChildren(this, selfNeedsLayout() || SVGRenderSupport::filtersForceContainerLayout(this));
// Invalidate all resources of this client if our layout changed.
if (everHadLayout() && needsLayout())
SVGResourcesCache::clientLayoutChanged(this);
// At this point LayoutRepainter already grabbed the old bounds,
// recalculate them now so repaintAfterLayout() uses the new bounds.
if (m_needsBoundariesUpdate || updatedTransform) {
updateCachedBoundaries();
m_needsBoundariesUpdate = false;
// If our bounds changed, notify the parents.
RenderSVGModelObject::setNeedsBoundariesUpdate();
}
repainter.repaintAfterLayout();
clearNeedsLayout();
}
void RenderSVGContainer::addChild(RenderObject* child, RenderObject* beforeChild)
{
RenderSVGModelObject::addChild(child, beforeChild);
SVGResourcesCache::clientWasAddedToTree(child, child->style());
}
void RenderSVGContainer::removeChild(RenderObject* child)
{
SVGResourcesCache::clientWillBeRemovedFromTree(child);
RenderSVGModelObject::removeChild(child);
}
bool RenderSVGContainer::selfWillPaint()
{
SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this);
return resources && resources->filter();
}
void RenderSVGContainer::paint(PaintInfo& paintInfo, const LayoutPoint&)
{
ANNOTATE_GRAPHICS_CONTEXT(paintInfo, this);
if (paintInfo.context->paintingDisabled())
return;
// Spec: groups w/o children still may render filter content.
if (!firstChild() && !selfWillPaint())
return;
FloatRect repaintRect = paintInvalidationRectInLocalCoordinates();
if (!SVGRenderSupport::paintInfoIntersectsRepaintRect(repaintRect, localToParentTransform(), paintInfo))
return;
PaintInfo childPaintInfo(paintInfo);
{
GraphicsContextStateSaver stateSaver(*childPaintInfo.context);
// Let the RenderSVGViewportContainer subclass clip if necessary
applyViewportClip(childPaintInfo);
childPaintInfo.applyTransform(localToParentTransform());
SVGRenderingContext renderingContext;
GraphicsContextCullSaver cullSaver(*childPaintInfo.context);
bool continueRendering = true;
if (childPaintInfo.phase == PaintPhaseForeground) {
renderingContext.prepareToRenderSVGContent(this, childPaintInfo);
continueRendering = renderingContext.isRenderingPrepared();
if (continueRendering && document().settings()->containerCullingEnabled())
cullSaver.cull(paintInvalidationRectInLocalCoordinates());
}
if (continueRendering) {
childPaintInfo.updatePaintingRootForChildren(this);
for (RenderObject* child = firstChild(); child; child = child->nextSibling())
child->paint(childPaintInfo, IntPoint());
}
}
// FIXME: This really should be drawn from local coordinates, but currently we hack it
// to avoid our clip killing our outline rect. Thus we translate our
// outline rect into parent coords before drawing.
// FIXME: This means our focus ring won't share our rotation like it should.
// We should instead disable our clip during PaintPhaseOutline
if (paintInfo.phase == PaintPhaseForeground && style()->outlineWidth() && style()->visibility() == VISIBLE) {
IntRect paintRectInParent = enclosingIntRect(localToParentTransform().mapRect(repaintRect));
paintOutline(paintInfo, paintRectInParent);
}
}
// addFocusRingRects is called from paintOutline and needs to be in the same coordinates as the paintOuline call
void RenderSVGContainer::addFocusRingRects(Vector<IntRect>& rects, const LayoutPoint&, const RenderLayerModelObject*)
{
IntRect paintRectInParent = enclosingIntRect(localToParentTransform().mapRect(paintInvalidationRectInLocalCoordinates()));
if (!paintRectInParent.isEmpty())
rects.append(paintRectInParent);
}
void RenderSVGContainer::updateCachedBoundaries()
{
SVGRenderSupport::computeContainerBoundingBoxes(this, m_objectBoundingBox, m_objectBoundingBoxValid, m_strokeBoundingBox, m_repaintBoundingBox);
SVGRenderSupport::intersectRepaintRectWithResources(this, m_repaintBoundingBox);
}
bool RenderSVGContainer::nodeAtFloatPoint(const HitTestRequest& request, HitTestResult& result, const FloatPoint& pointInParent, HitTestAction hitTestAction)
{
// Give RenderSVGViewportContainer a chance to apply its viewport clip
if (!pointIsInsideViewportClip(pointInParent))
return false;
FloatPoint localPoint = localToParentTransform().inverse().mapPoint(pointInParent);
if (!SVGRenderSupport::pointInClippingArea(this, localPoint))
return false;
for (RenderObject* child = lastChild(); child; child = child->previousSibling()) {
if (child->nodeAtFloatPoint(request, result, localPoint, hitTestAction)) {
updateHitTestResult(result, roundedLayoutPoint(localPoint));
return true;
}
}
// pointer-events=boundingBox makes it possible for containers to be direct targets
if (style()->pointerEvents() == PE_BOUNDINGBOX) {
ASSERT(isObjectBoundingBoxValid());
if (objectBoundingBox().contains(localPoint)) {
updateHitTestResult(result, roundedLayoutPoint(localPoint));
return true;
}
}
// 16.4: "If there are no graphics elements whose relevant graphics content is under the pointer (i.e., there is no target element), the event is not dispatched."
return false;
}
}
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