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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/paint/SVGContainerPainter.h"
#include "core/rendering/RenderView.h"
#include "core/rendering/svg/SVGRenderSupport.h"
#include "core/rendering/svg/SVGResources.h"
#include "core/rendering/svg/SVGResourcesCache.h"
namespace blink {
RenderSVGContainer::RenderSVGContainer(SVGElement* node)
: RenderSVGModelObject(node)
, m_objectBoundingBoxValid(false)
, m_needsBoundariesUpdate(true)
, m_hasNonIsolatedBlendingDescendants(false)
, m_hasNonIsolatedBlendingDescendantsDirty(false)
{
}
RenderSVGContainer::~RenderSVGContainer()
{
}
void RenderSVGContainer::trace(Visitor* visitor)
{
visitor->trace(m_children);
RenderSVGModelObject::trace(visitor);
}
void RenderSVGContainer::layout()
{
ASSERT(needsLayout());
// 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);
if (m_needsBoundariesUpdate || updatedTransform) {
updateCachedBoundaries();
m_needsBoundariesUpdate = false;
// If our bounds changed, notify the parents.
RenderSVGModelObject::setNeedsBoundariesUpdate();
}
clearNeedsLayout();
}
void RenderSVGContainer::addChild(RenderObject* child, RenderObject* beforeChild)
{
RenderSVGModelObject::addChild(child, beforeChild);
SVGResourcesCache::clientWasAddedToTree(child, child->style());
bool shouldIsolateDescendants = (child->isBlendingAllowed() && child->style()->hasBlendMode()) || child->hasNonIsolatedBlendingDescendants();
if (shouldIsolateDescendants)
descendantIsolationRequirementsChanged(DescendantIsolationRequired);
}
void RenderSVGContainer::removeChild(RenderObject* child)
{
SVGResourcesCache::clientWillBeRemovedFromTree(child);
RenderSVGModelObject::removeChild(child);
bool hadNonIsolatedDescendants = (child->isBlendingAllowed() && child->style()->hasBlendMode()) || child->hasNonIsolatedBlendingDescendants();
if (hadNonIsolatedDescendants)
descendantIsolationRequirementsChanged(DescendantIsolationNeedsUpdate);
}
bool RenderSVGContainer::selfWillPaint()
{
SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this);
return resources && resources->filter();
}
void RenderSVGContainer::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
{
RenderSVGModelObject::styleDidChange(diff, oldStyle);
bool hadIsolation = oldStyle && !isSVGHiddenContainer() && SVGRenderSupport::willIsolateBlendingDescendantsForStyle(oldStyle);
bool isolationChanged = hadIsolation == !SVGRenderSupport::willIsolateBlendingDescendantsForObject(this);
if (!parent() || !isolationChanged)
return;
if (hasNonIsolatedBlendingDescendants())
parent()->descendantIsolationRequirementsChanged(SVGRenderSupport::willIsolateBlendingDescendantsForObject(this) ? DescendantIsolationNeedsUpdate : DescendantIsolationRequired);
}
bool RenderSVGContainer::hasNonIsolatedBlendingDescendants() const
{
if (m_hasNonIsolatedBlendingDescendantsDirty) {
m_hasNonIsolatedBlendingDescendants = SVGRenderSupport::computeHasNonIsolatedBlendingDescendants(this);
m_hasNonIsolatedBlendingDescendantsDirty = false;
}
return m_hasNonIsolatedBlendingDescendants;
}
void RenderSVGContainer::descendantIsolationRequirementsChanged(DescendantIsolationState state)
{
switch (state) {
case DescendantIsolationRequired:
m_hasNonIsolatedBlendingDescendants = true;
m_hasNonIsolatedBlendingDescendantsDirty = false;
break;
case DescendantIsolationNeedsUpdate:
if (m_hasNonIsolatedBlendingDescendantsDirty)
return;
m_hasNonIsolatedBlendingDescendantsDirty = true;
break;
}
if (SVGRenderSupport::willIsolateBlendingDescendantsForObject(this))
return;
if (parent())
parent()->descendantIsolationRequirementsChanged(state);
}
void RenderSVGContainer::paint(const PaintInfo& paintInfo, const LayoutPoint&)
{
SVGContainerPainter(*this).paint(paintInfo);
}
// addFocusRingRects is called from paintOutline and needs to be in the same coordinates as the paintOuline call
void RenderSVGContainer::addFocusRingRects(Vector<LayoutRect>& rects, const LayoutPoint&) const
{
LayoutRect paintRectInParent = LayoutRect(localToParentTransform().mapRect(paintInvalidationRectInLocalCoordinates()));
if (!paintRectInParent.isEmpty())
rects.append(paintRectInParent);
}
void RenderSVGContainer::updateCachedBoundaries()
{
SVGRenderSupport::computeContainerBoundingBoxes(this, m_objectBoundingBox, m_objectBoundingBoxValid, m_strokeBoundingBox, m_paintInvalidationBoundingBox);
SVGRenderSupport::intersectPaintInvalidationRectWithResources(this, m_paintInvalidationBoundingBox);
}
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;
if (!SVGRenderSupport::transformToUserSpaceAndCheckClipping(this, localToParentTransform(), pointInParent, 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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