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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
#include "FormattingConstraints.h"
#include "LayoutElementBox.h"
#include "LayoutUnit.h"
#include "LayoutUnits.h"
#include <wtf/TZoneMalloc.h>
namespace WebCore {
class LayoutSize;
struct Length;
namespace Layout {
class BoxGeometry;
class ElementBox;
struct ConstraintsForInFlowContent;
class FormattingGeometry;
class FormattingQuirks;
struct IntrinsicWidthConstraints;
class LayoutState;
class FormattingContext {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(FormattingContext);
public:
virtual ~FormattingContext();
virtual void layoutInFlowContent(const ConstraintsForInFlowContent&) { };
virtual IntrinsicWidthConstraints computedIntrinsicWidthConstraints() { return { }; }
virtual LayoutUnit usedContentHeight() const { return { }; }
const ElementBox& root() const { return m_root; }
LayoutState& layoutState();
const LayoutState& layoutState() const { return const_cast<FormattingContext&>(*this).layoutState(); }
enum class EscapeReason {
TableQuirkNeedsGeometryFromEstablishedFormattingContext,
OutOfFlowBoxNeedsInFlowGeometry,
FloatBoxIsAlwaysRelativeToFloatStateRoot,
FindFixedHeightAncestorQuirk,
DocumentBoxStretchesToViewportQuirk,
BodyStretchesToViewportQuirk,
TableNeedsAccessToTableWrapper
};
const BoxGeometry& geometryForBox(const Box&, std::optional<EscapeReason> = std::nullopt) const;
BoxGeometry& geometryForBox(const Box&, std::optional<EscapeReason> = std::nullopt);
bool isBlockFormattingContext() const { return root().establishesBlockFormattingContext(); }
bool isTableFormattingContext() const { return root().establishesTableFormattingContext(); }
bool isTableWrapperBlockFormattingContext() const { return isBlockFormattingContext() && root().isTableWrapperBox(); }
bool isFlexFormattingContext() const { return root().establishesFlexFormattingContext(); }
static const InitialContainingBlock& initialContainingBlock(const Box&);
static const ElementBox& containingBlock(const Box&);
#if ASSERT_ENABLED
static const ElementBox& formattingContextRoot(const Box&);
#endif
protected:
FormattingContext(const ElementBox& formattingContextRoot, LayoutState&);
#if ASSERT_ENABLED
virtual void validateGeometryConstraintsAfterLayout() const;
#endif
private:
CheckedRef<const ElementBox> m_root;
LayoutState& m_layoutState;
};
}
}
#define SPECIALIZE_TYPE_TRAITS_LAYOUT_FORMATTING_CONTEXT(ToValueTypeName, predicate) \
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::Layout::ToValueTypeName) \
static bool isType(const WebCore::Layout::FormattingContext& formattingContext) { return formattingContext.predicate; } \
SPECIALIZE_TYPE_TRAITS_END()
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