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/*
* Copyright (C) 2006 Apple Computer, Inc.
* Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) Research In Motion Limited 2010. All rights reserved.
*
* 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 "core/layout/svg/LayoutSVGBlock.h"
#include "core/layout/LayoutView.h"
#include "core/layout/svg/LayoutSVGRoot.h"
#include "core/layout/svg/SVGLayoutSupport.h"
#include "core/layout/svg/SVGResourcesCache.h"
#include "core/style/ShadowList.h"
#include "core/svg/SVGElement.h"
namespace blink {
LayoutSVGBlock::LayoutSVGBlock(SVGElement* element)
: LayoutBlockFlow(element)
{
}
bool LayoutSVGBlock::allowsOverflowClip() const
{
// LayoutSVGlock, used by Layout(SVGText|ForeignObject), is not allowed to have overflow clip.
// LayoutBlock assumes a layer to be present when the overflow clip functionality is requested. Both
// Layout(SVGText|ForeignObject) return 'NoPaintLayer' on 'layerTypeRequired'. Fine for LayoutSVGText.
//
// If we want to support overflow rules for <foreignObject> we can choose between two solutions:
// a) make LayoutSVGForeignObject require layers and SVG layer aware
// b) reactor overflow logic out of Layer (as suggested by dhyatt), which is a large task
//
// Until this is resolved, disable overflow support. Opera/FF don't support it as well at the moment (Feb 2010).
//
// Note: This does NOT affect overflow handling on outer/inner <svg> elements - this is handled
// manually by LayoutSVGRoot - which owns the documents enclosing root layer and thus works fine.
return false;
}
void LayoutSVGBlock::absoluteRects(Vector<IntRect>&, const LayoutPoint&) const
{
// This code path should never be taken for SVG, as we're assuming useTransforms=true everywhere, absoluteQuads should be used.
ASSERT_NOT_REACHED();
}
void LayoutSVGBlock::willBeDestroyed()
{
SVGResourcesCache::clientDestroyed(this);
LayoutBlockFlow::willBeDestroyed();
}
void LayoutSVGBlock::styleDidChange(StyleDifference diff, const ComputedStyle* oldStyle)
{
if (diff.needsFullLayout()) {
setNeedsBoundariesUpdate();
if (diff.transformChanged())
setNeedsTransformUpdate();
}
if (isBlendingAllowed()) {
bool hasBlendModeChanged = (oldStyle && oldStyle->hasBlendMode()) == !style()->hasBlendMode();
if (parent() && hasBlendModeChanged)
parent()->descendantIsolationRequirementsChanged(style()->hasBlendMode() ? DescendantIsolationRequired : DescendantIsolationNeedsUpdate);
}
LayoutBlock::styleDidChange(diff, oldStyle);
SVGResourcesCache::clientStyleChanged(this, diff, styleRef());
}
void LayoutSVGBlock::mapLocalToAncestor(const LayoutBoxModelObject* ancestor, TransformState& transformState, MapCoordinatesFlags, bool* wasFixed) const
{
SVGLayoutSupport::mapLocalToAncestor(this, ancestor, transformState, wasFixed);
}
void LayoutSVGBlock::mapAncestorToLocal(const LayoutBoxModelObject* ancestor, TransformState& transformState, MapCoordinatesFlags) const
{
if (this == ancestor)
return;
SVGLayoutSupport::mapAncestorToLocal(*this, ancestor, transformState);
}
const LayoutObject* LayoutSVGBlock::pushMappingToContainer(const LayoutBoxModelObject* ancestorToStopAt, LayoutGeometryMap& geometryMap) const
{
return SVGLayoutSupport::pushMappingToContainer(this, ancestorToStopAt, geometryMap);
}
LayoutRect LayoutSVGBlock::absoluteClippedOverflowRect() const
{
return SVGLayoutSupport::clippedOverflowRectForPaintInvalidation(*this, *view());
}
bool LayoutSVGBlock::mapToVisibleRectInAncestorSpace(const LayoutBoxModelObject* ancestor, LayoutRect& rect, VisibleRectFlags visibleRectFlags) const
{
return SVGLayoutSupport::mapToVisibleRectInAncestorSpace(*this, ancestor, FloatRect(rect), rect);
}
bool LayoutSVGBlock::nodeAtPoint(HitTestResult&, const HitTestLocation&, const LayoutPoint&, HitTestAction)
{
ASSERT_NOT_REACHED();
return false;
}
void LayoutSVGBlock::invalidateTreeIfNeeded(const PaintInvalidationState& paintInvalidationState)
{
if (!shouldCheckForPaintInvalidation(paintInvalidationState))
return;
// TODO(wangxianzhu): Move this to fast path if possible. crbug.com/391054.
ForceHorriblySlowRectMapping slowRectMapping(&paintInvalidationState);
LayoutBlockFlow::invalidateTreeIfNeeded(paintInvalidationState);
}
} // namespace blink
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