77 lines
2.9 KiB
C++
77 lines
2.9 KiB
C++
/*
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* Copyright (C) 2018 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. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#if ENABLE(LAYOUT_FORMATTING_CONTEXT)
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#include <wtf/IsoMalloc.h>
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#include <wtf/OptionSet.h>
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namespace WebCore {
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class GraphicsContext;
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class IntRect;
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class LayoutSize;
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class RenderView;
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namespace Layout {
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class ContainerBox;
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class InvalidationState;
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class LayoutState;
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class FormattingContext;
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// LayoutContext is the entry point for layout.
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// LayoutContext::layout() generates the display tree for the root container's subtree (it does not run layout on the root though).
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// Note, while the initial containing block is entry point for the initial layout, it does not necessarily need to be the entry point of any
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// subsequent layouts (subtree layout). A non-initial, subtree layout could be initiated on multiple formatting contexts.
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// Each formatting context has an entry point for layout, which potenitally means multiple entry points per layout frame.
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class LayoutContext {
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WTF_MAKE_ISO_ALLOCATED(LayoutContext);
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public:
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LayoutContext(LayoutState&);
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void layout(const LayoutSize& rootContentBoxSize, InvalidationState&);
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void layoutWithPreparedRootGeometry(InvalidationState&);
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static std::unique_ptr<FormattingContext> createFormattingContext(const ContainerBox& formattingContextRoot, LayoutState&);
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#ifndef NDEBUG
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// For testing purposes only
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static void verifyAndOutputMismatchingLayoutTree(const LayoutState&, const RenderView&);
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#endif
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private:
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void layoutFormattingContextSubtree(const ContainerBox&, InvalidationState&);
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LayoutState& layoutState() { return m_layoutState; }
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LayoutState& m_layoutState;
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};
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}
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}
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#endif
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