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/*
* Copyright (C) 2021 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 "InlineFormattingContext.h"
#include "InlineFormattingUtils.h"
namespace WebCore {
namespace Layout {
class LineBoxVerticalAligner {
public:
LineBoxVerticalAligner(const InlineFormattingContext&);
InlineLayoutUnit computeLogicalHeightAndAlign(LineBox&) const;
private:
InlineLayoutUnit simplifiedVerticalAlignment(LineBox&) const;
struct LineBoxAlignmentContent {
InlineLayoutUnit height() const { return std::max(nonLineBoxRelativeAlignedMaximumHeight, std::max(topAndBottomAlignedMaximumHeight.top.value_or(0.f), topAndBottomAlignedMaximumHeight.bottom.value_or(0.f))); }
InlineLayoutUnit nonLineBoxRelativeAlignedMaximumHeight { 0 };
struct TopAndBottomAlignedMaximumHeight {
std::optional<InlineLayoutUnit> top { };
std::optional<InlineLayoutUnit> bottom { };
};
TopAndBottomAlignedMaximumHeight topAndBottomAlignedMaximumHeight { };
bool hasTextEmphasis { false };
};
LineBoxAlignmentContent computeLineBoxLogicalHeight(LineBox&) const;
void computeRootInlineBoxVerticalPosition(LineBox&, const LineBoxAlignmentContent&) const;
void alignInlineLevelBoxes(LineBox&, InlineLayoutUnit lineBoxLogicalHeight) const;
InlineLayoutUnit adjustForAnnotationIfNeeded(LineBox&, InlineLayoutUnit lineBoxHeight) const;
std::optional<InlineLevelBox::AscentAndDescent> layoutBoundsForInlineBoxSubtree(const LineBox::InlineLevelBoxList& nonRootInlineLevelBoxes, size_t inlineBoxIndex) const;
enum class IsInlineLeveBoxAlignment : bool { No, Yes };
InlineLayoutUnit logicalTopOffsetFromParentBaseline(const InlineLevelBox&, const InlineLevelBox& parentInlineBox, IsInlineLeveBoxAlignment = IsInlineLeveBoxAlignment::No) const;
const InlineFormattingUtils& formattingUtils() const { return formattingContext().formattingUtils(); }
const InlineFormattingContext& formattingContext() const { return m_inlineFormattingContext; }
const ElementBox& rootBox() const { return formattingContext().root(); }
const InlineLayoutState& layoutState() const { return formattingContext().layoutState(); }
private:
const InlineFormattingContext& m_inlineFormattingContext;
};
}
}
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