Source/WebCore/layout/integration/flex/LayoutIntegrationFlexLayout.h

/*
 * Copyright (C) 2022 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 "FlexFormattingState.h"
#include "LayoutIntegrationBoxTree.h"
#include "LayoutState.h"
#include "RenderObjectEnums.h"
#include <wtf/CheckedPtr.h>

namespace WebCore {

class HitTestLocation;
class HitTestRequest;
class HitTestResult;
class RenderBlock;
class RenderFlexibleBox;
class RenderStyle;
struct PaintInfo;

namespace LayoutIntegration {

class FlexLayout : public CanMakeCheckedPtr {
    WTF_MAKE_FAST_ALLOCATED;
public:
    FlexLayout(RenderFlexibleBox&);

    void updateFormattingRootGeometryAndInvalidate();
    void updateFlexItemDimensions(const RenderBlock& flexItem, LayoutUnit minimumContentSize, LayoutUnit maximumContentSize);
    void updateStyle(const RenderBlock&, const RenderStyle& oldStyle);

    std::pair<LayoutUnit, LayoutUnit> computeIntrinsicWidthConstraints();

    void layout();
    void paint(PaintInfo&, const LayoutPoint& paintOffset);
    bool hitTest(const HitTestRequest&, HitTestResult&, const HitTestLocation&, const LayoutPoint& accumulatedOffset, HitTestAction);

    void collectOverflow();
    LayoutUnit contentLogicalHeight() const;

private:
    void updateRenderers() const;

    const Layout::ContainerBox& rootLayoutBox() const { return m_boxTree.rootLayoutBox(); }
    Layout::ContainerBox& rootLayoutBox() { return m_boxTree.rootLayoutBox(); }

    const RenderFlexibleBox& flexBoxRenderer() const { return downcast<RenderFlexibleBox>(m_boxTree.rootRenderer()); }
    RenderFlexibleBox& flexBoxRenderer() { return downcast<RenderFlexibleBox>(m_boxTree.rootRenderer()); }

    BoxTree m_boxTree;
    Layout::LayoutState m_layoutState;
    Layout::FlexFormattingState& m_flexFormattingState;
};

}
}

#endif