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      1 /*
      2  * Copyright (C) 2006 Apple Computer, Inc.
      3  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann (at) kde.org>
      4  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
      5  *
      6  * This library is free software; you can redistribute it and/or
      7  * modify it under the terms of the GNU Library General Public
      8  * License as published by the Free Software Foundation; either
      9  * version 2 of the License, or (at your option) any later version.
     10  *
     11  * This library is distributed in the hope that it will be useful,
     12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14  * Library General Public License for more details.
     15  *
     16  * You should have received a copy of the GNU Library General Public License
     17  * along with this library; see the file COPYING.LIB.  If not, write to
     18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     19  * Boston, MA 02110-1301, USA.
     20  */
     21 
     22 #include "config.h"
     23 
     24 #include "core/rendering/svg/RenderSVGBlock.h"
     25 
     26 #include "core/rendering/RenderView.h"
     27 #include "core/rendering/style/ShadowList.h"
     28 #include "core/rendering/svg/SVGRenderSupport.h"
     29 #include "core/rendering/svg/SVGResourcesCache.h"
     30 #include "core/svg/SVGElement.h"
     31 
     32 namespace blink {
     33 
     34 RenderSVGBlock::RenderSVGBlock(SVGElement* element)
     35     : RenderBlockFlow(element)
     36 {
     37 }
     38 
     39 LayoutRect RenderSVGBlock::visualOverflowRect() const
     40 {
     41     LayoutRect borderRect = borderBoxRect();
     42 
     43     if (const ShadowList* textShadow = style()->textShadow())
     44         textShadow->adjustRectForShadow(borderRect);
     45 
     46     return borderRect;
     47 }
     48 
     49 void RenderSVGBlock::updateFromStyle()
     50 {
     51     RenderBlock::updateFromStyle();
     52 
     53     // RenderSVGlock, used by Render(SVGText|ForeignObject), is not allowed to call setHasOverflowClip(true).
     54     // RenderBlock assumes a layer to be present when the overflow clip functionality is requested. Both
     55     // Render(SVGText|ForeignObject) return 'NoLayer' on 'layerTypeRequired'. Fine for RenderSVGText.
     56     //
     57     // If we want to support overflow rules for <foreignObject> we can choose between two solutions:
     58     // a) make RenderSVGForeignObject require layers and SVG layer aware
     59     // b) reactor overflow logic out of RenderLayer (as suggested by dhyatt), which is a large task
     60     //
     61     // Until this is resolved, disable overflow support. Opera/FF don't support it as well at the moment (Feb 2010).
     62     //
     63     // Note: This does NOT affect overflow handling on outer/inner <svg> elements - this is handled
     64     // manually by RenderSVGRoot - which owns the documents enclosing root layer and thus works fine.
     65     setHasOverflowClip(false);
     66 }
     67 
     68 void RenderSVGBlock::absoluteRects(Vector<IntRect>&, const LayoutPoint&) const
     69 {
     70     // This code path should never be taken for SVG, as we're assuming useTransforms=true everywhere, absoluteQuads should be used.
     71     ASSERT_NOT_REACHED();
     72 }
     73 
     74 void RenderSVGBlock::willBeDestroyed()
     75 {
     76     SVGResourcesCache::clientDestroyed(this);
     77     RenderBlockFlow::willBeDestroyed();
     78 }
     79 
     80 void RenderSVGBlock::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
     81 {
     82     if (diff.needsFullLayout())
     83         setNeedsBoundariesUpdate();
     84 
     85     RenderBlock::styleDidChange(diff, oldStyle);
     86     SVGResourcesCache::clientStyleChanged(this, diff, style());
     87 }
     88 
     89 void RenderSVGBlock::mapLocalToContainer(const RenderLayerModelObject* paintInvalidationContainer, TransformState& transformState, MapCoordinatesFlags, bool* wasFixed, const PaintInvalidationState* paintInvalidationState) const
     90 {
     91     SVGRenderSupport::mapLocalToContainer(this, paintInvalidationContainer, transformState, wasFixed, paintInvalidationState);
     92 }
     93 
     94 const RenderObject* RenderSVGBlock::pushMappingToContainer(const RenderLayerModelObject* ancestorToStopAt, RenderGeometryMap& geometryMap) const
     95 {
     96     return SVGRenderSupport::pushMappingToContainer(this, ancestorToStopAt, geometryMap);
     97 }
     98 
     99 LayoutRect RenderSVGBlock::clippedOverflowRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer, const PaintInvalidationState* paintInvalidationState) const
    100 {
    101     return SVGRenderSupport::clippedOverflowRectForPaintInvalidation(this, paintInvalidationContainer, paintInvalidationState);
    102 }
    103 
    104 void RenderSVGBlock::computeFloatRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer, FloatRect& paintInvalidationRect, const PaintInvalidationState* paintInvalidationState) const
    105 {
    106     SVGRenderSupport::computeFloatRectForPaintInvalidation(this, paintInvalidationContainer, paintInvalidationRect, paintInvalidationState);
    107 }
    108 
    109 bool RenderSVGBlock::nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation&, const LayoutPoint&, HitTestAction)
    110 {
    111     ASSERT_NOT_REACHED();
    112     return false;
    113 }
    114 
    115 void RenderSVGBlock::invalidateTreeIfNeeded(const PaintInvalidationState& paintInvalidationState)
    116 {
    117     if (!shouldCheckForPaintInvalidation(paintInvalidationState))
    118         return;
    119 
    120     ForceHorriblySlowRectMapping slowRectMapping(&paintInvalidationState);
    121     RenderBlockFlow::invalidateTreeIfNeeded(paintInvalidationState);
    122 }
    123 
    124 }
    125