InlineLineGeometry.h   [plain text]

/*
 * Copyright (C) 2020 Apple Inc. All rights reserved.
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#pragma once

#if ENABLE(LAYOUT_FORMATTING_CONTEXT)

#include "InlineRect.h"

namespace WebCore {
namespace Layout {

class InlineLineGeometry {
    WTF_MAKE_FAST_ALLOCATED;
public:
    struct EnclosingTopAndBottom {
        // This values encloses the root inline box and any other inline level box's border box.
        float top { 0 };
        float bottom { 0 };
    };
    InlineLineGeometry(const InlineRect& lineBoxLogicalRect, EnclosingTopAndBottom, InlineLayoutUnit aligmentBaseline, InlineLayoutUnit contentLogicalLeftOffset, InlineLayoutUnit contentLogicalWidth);

    const InlineRect& lineBoxLogicalRect() const { return m_lineBoxLogicalRect; }

    EnclosingTopAndBottom enclosingTopAndBottom() const { return m_enclosingTopAndBottom; }

    InlineLayoutUnit baseline() const { return m_aligmentBaseline; }

    InlineLayoutUnit contentLogicalLeftOffset() const { return m_contentLogicalLeftOffset; }
    InlineLayoutUnit contentLogicalWidth() const { return m_contentLogicalWidth; }

    void moveVertically(InlineLayoutUnit offset) { m_lineBoxLogicalRect.moveVertically(offset); }

private:
    // This is line box geometry (see https://www.w3.org/TR/css-inline-3/#line-box).
    InlineRect m_lineBoxLogicalRect;
    // Enclosing top and bottom includes all inline level boxes (border box) vertically.
    // While the line box usually enclose them as well, its vertical geometry is based on
    // the layout bounds of the inline level boxes which may be different when line-height is present.
    EnclosingTopAndBottom m_enclosingTopAndBottom;
    InlineLayoutUnit m_aligmentBaseline { 0 };
    InlineLayoutUnit m_contentLogicalLeftOffset { 0 };
    InlineLayoutUnit m_contentLogicalWidth { 0 };
};

inline InlineLineGeometry::InlineLineGeometry(const InlineRect& lineBoxLogicalRect, EnclosingTopAndBottom enclosingTopAndBottom, InlineLayoutUnit aligmentBaseline, InlineLayoutUnit contentLogicalLeftOffset, InlineLayoutUnit contentLogicalWidth)
    : m_lineBoxLogicalRect(lineBoxLogicalRect)
    , m_enclosingTopAndBottom(enclosingTopAndBottom)
    , m_aligmentBaseline(aligmentBaseline)
    , m_contentLogicalLeftOffset(contentLogicalLeftOffset)
    , m_contentLogicalWidth(contentLogicalWidth)
{
}

}
}

#endif