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/*
* Copyright (C) 2018 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#if ENABLE(LAYOUT_FORMATTING_CONTEXT)
#include <wtf/HashMap.h>
#include <wtf/HashSet.h>
#include <wtf/IsoMalloc.h>
#include <wtf/WeakPtr.h>
namespace WebCore {
namespace Display {
class Box;
}
namespace Layout {
class Box;
class Container;
class FormattingContext;
class FormattingState;
class LayoutState {
WTF_MAKE_ISO_ALLOCATED(LayoutState);
public:
LayoutState(const Container& root);
FormattingState& createFormattingStateForFormattingRootIfNeeded(const Container& formattingContextRoot);
FormattingState& establishedFormattingState(const Container& formattingRoot) const;
FormattingState& formattingStateForBox(const Box&) const;
bool hasFormattingState(const Container& formattingRoot) const { return m_formattingStates.contains(&formattingRoot); }
#ifndef NDEBUG
void registerFormattingContext(const FormattingContext&);
void deregisterFormattingContext(const FormattingContext& formattingContext) { m_formattingContextList.remove(&formattingContext); }
#endif
Display::Box& displayBoxForLayoutBox(const Box& layoutBox);
const Display::Box& displayBoxForLayoutBox(const Box& layoutBox) const;
bool hasDisplayBox(const Box& layoutBox) const { return m_layoutToDisplayBox.contains(&layoutBox); }
enum class QuirksMode { No, Limited, Yes };
void setQuirksMode(QuirksMode quirksMode) { m_quirksMode = quirksMode; }
bool inQuirksMode() const { return m_quirksMode == QuirksMode::Yes; }
bool inLimitedQuirksMode() const { return m_quirksMode == QuirksMode::Limited; }
bool inNoQuirksMode() const { return m_quirksMode == QuirksMode::No; }
const Container& root() const { return *m_root; }
private:
WeakPtr<const Container> m_root;
HashMap<const Container*, std::unique_ptr<FormattingState>> m_formattingStates;
#ifndef NDEBUG
HashSet<const FormattingContext*> m_formattingContextList;
#endif
HashMap<const Box*, std::unique_ptr<Display::Box>> m_layoutToDisplayBox;
QuirksMode m_quirksMode { QuirksMode::No };
};
#ifndef NDEBUG
inline void LayoutState::registerFormattingContext(const FormattingContext& formattingContext)
{
// Multiple formatting contexts of the same root within a layout frame indicates defective layout logic.
ASSERT(!m_formattingContextList.contains(&formattingContext));
m_formattingContextList.add(&formattingContext);
}
#endif
}
}
#endif