62 lines
2.6 KiB
C++
62 lines
2.6 KiB
C++
/*
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* Copyright (C) 2012 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "RenderFragmentContainer.h"
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namespace WebCore {
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class RenderFragmentedFlow;
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// RenderFragmentContainerSet represents a set of regions that all have the same width and height. It is a "composite region box" that
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// can be used to represent a single run of contiguous regions.
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//
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// By combining runs of same-size columns or pages into a single object, we significantly reduce the number of unique RenderObjects
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// required to represent those objects.
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//
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// This class is abstract and is only intended for use by renderers that generate anonymous runs of identical regions, i.e.,
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// columns and printing. RenderMultiColumnSet and RenderPageSet represent runs of columns and pages respectively.
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//
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// FIXME: For now we derive from RenderFragmentContainer, but this may change at some point.
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class RenderFragmentContainerSet : public RenderFragmentContainer {
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WTF_MAKE_ISO_ALLOCATED(RenderFragmentContainerSet);
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public:
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void expandToEncompassFragmentedFlowContentsIfNeeded();
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protected:
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RenderFragmentContainerSet(Document&, RenderStyle&&, RenderFragmentedFlow&);
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private:
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void installFragmentedFlow() final;
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const char* renderName() const override = 0;
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bool isRenderFragmentContainerSet() const final { return true; }
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};
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} // namespace WebCore
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