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920920310e
Merge most of it into RenderBox. Only RenderBoxes can have layers now. This also meant a bit of code could be cleaned up since some virtuals (e.g. updateFromStyle) are no longer needed since they're only called on RenderBoxes. collectSelfPaintingLayers is the only bit that's moved into RenderBoxModelObject instead of RenderBox. That's because we need to be able to recurse down into RenderInlines since they may contain RenderBoxes that have selfPaintingLayers. R=abarth@chromium.org Review URL: https://codereview.chromium.org/953673002
132 lines
5.0 KiB
C++
132 lines
5.0 KiB
C++
/*
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* Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
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* Copyright (C) 2013 Intel Corporation. All rights reserved.
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*
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* Portions are Copyright (C) 1998 Netscape Communications Corporation.
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*
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* Other contributors:
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* Robert O'Callahan <roc+@cs.cmu.edu>
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* David Baron <dbaron@fas.harvard.edu>
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* Christian Biesinger <cbiesinger@web.de>
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* Randall Jesup <rjesup@wgate.com>
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* Roland Mainz <roland.mainz@informatik.med.uni-giessen.de>
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* Josh Soref <timeless@mac.com>
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* Boris Zbarsky <bzbarsky@mit.edu>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Alternatively, the contents of this file may be used under the terms
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* of either the Mozilla Public License Version 1.1, found at
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* http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public
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* License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html
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* (the "GPL"), in which case the provisions of the MPL or the GPL are
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* applicable instead of those above. If you wish to allow use of your
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* version of this file only under the terms of one of those two
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* licenses (the MPL or the GPL) and not to allow others to use your
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* version of this file under the LGPL, indicate your decision by
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* deletingthe provisions above and replace them with the notice and
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* other provisions required by the MPL or the GPL, as the case may be.
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* If you do not delete the provisions above, a recipient may use your
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* version of this file under any of the LGPL, the MPL or the GPL.
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*/
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#ifndef SKY_ENGINE_CORE_RENDERING_RENDERLAYERCLIPPER_H_
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#define SKY_ENGINE_CORE_RENDERING_RENDERLAYERCLIPPER_H_
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#include "sky/engine/core/rendering/ClipRectsCache.h"
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#include "sky/engine/core/rendering/RenderBox.h"
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namespace blink {
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class RenderLayer;
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class ClipRectsContext {
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public:
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ClipRectsContext(const RenderLayer* root, ClipRectsCacheSlot slot, const LayoutSize& accumulation = LayoutSize())
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: rootLayer(root)
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, cacheSlot(slot)
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, subPixelAccumulation(accumulation)
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{
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}
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bool usesCache() const
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{
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return cacheSlot != UncachedClipRects;
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}
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const RenderLayer* const rootLayer;
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private:
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friend class RenderLayerClipper;
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ClipRectsCacheSlot cacheSlot;
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LayoutSize subPixelAccumulation;
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};
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class RenderLayerClipper {
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WTF_MAKE_NONCOPYABLE(RenderLayerClipper);
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public:
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explicit RenderLayerClipper(RenderBox&);
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void clearClipRectsIncludingDescendants();
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void clearClipRectsIncludingDescendants(ClipRectsCacheSlot);
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LayoutRect childrenClipRect() const; // Returns the foreground clip rect of the layer in the document's coordinate space.
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LayoutRect localClipRect() const; // Returns the background clip rect of the layer in the local coordinate space.
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ClipRects* getClipRects(const ClipRectsContext&) const;
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ClipRect backgroundClipRect(const ClipRectsContext&) const;
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// This method figures out our layerBounds in coordinates relative to
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// |rootLayer|. It also computes our background and foreground clip rects
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// for painting/event handling.
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// Pass offsetFromRoot if known.
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void calculateRects(const ClipRectsContext&, const LayoutRect& paintDirtyRect, LayoutRect& layerBounds,
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ClipRect& backgroundRect, ClipRect& foregroundRect, const LayoutPoint* offsetFromRoot = 0) const;
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private:
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void calculateClipRects(const ClipRectsContext&, ClipRects&) const;
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ClipRects* clipRectsIfCached(const ClipRectsContext&) const;
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ClipRects* storeClipRectsInCache(const ClipRectsContext&, ClipRects* parentClipRects, const ClipRects&) const;
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// cachedClipRects looks buggy: It doesn't check whether context.rootLayer and entry.root match.
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// FIXME: Move callers to clipRectsIfCached, which does the proper checks.
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ClipRects* cachedClipRects(const ClipRectsContext& context) const
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{
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return m_cache ? m_cache->get(context.cacheSlot).clipRects.get() : 0;
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}
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void getOrCalculateClipRects(const ClipRectsContext&, ClipRects&) const;
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RenderLayer* clippingRootForPainting() const;
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ClipRectsCache& cache() const
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{
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if (!m_cache)
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m_cache = adoptPtr(new ClipRectsCache);
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return *m_cache;
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}
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// FIXME: Could this be a RenderBox?
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RenderBox& m_renderer;
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mutable OwnPtr<ClipRectsCache> m_cache;
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};
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} // namespace blink
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#endif // SKY_ENGINE_CORE_RENDERING_RENDERLAYERCLIPPER_H_
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