1/*
2 * Copyright (C) 2006 Apple Computer, Inc.
3 * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@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
32namespace blink {
33
34RenderSVGBlock::RenderSVGBlock(SVGElement* element)
35    : RenderBlockFlow(element)
36{
37}
38
39LayoutRect 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
49void 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
68void 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
74void RenderSVGBlock::willBeDestroyed()
75{
76    SVGResourcesCache::clientDestroyed(this);
77    RenderBlockFlow::willBeDestroyed();
78}
79
80void 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
89void 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
94const RenderObject* RenderSVGBlock::pushMappingToContainer(const RenderLayerModelObject* ancestorToStopAt, RenderGeometryMap& geometryMap) const
95{
96    return SVGRenderSupport::pushMappingToContainer(this, ancestorToStopAt, geometryMap);
97}
98
99LayoutRect RenderSVGBlock::clippedOverflowRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer, const PaintInvalidationState* paintInvalidationState) const
100{
101    return SVGRenderSupport::clippedOverflowRectForPaintInvalidation(this, paintInvalidationContainer, paintInvalidationState);
102}
103
104void RenderSVGBlock::computeFloatRectForPaintInvalidation(const RenderLayerModelObject* paintInvalidationContainer, FloatRect& paintInvalidationRect, const PaintInvalidationState* paintInvalidationState) const
105{
106    SVGRenderSupport::computeFloatRectForPaintInvalidation(this, paintInvalidationContainer, paintInvalidationRect, paintInvalidationState);
107}
108
109bool RenderSVGBlock::nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation&, const LayoutPoint&, HitTestAction)
110{
111    ASSERT_NOT_REACHED();
112    return false;
113}
114
115void 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