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/*
* Copyright (C) 2020 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 "InlineIteratorBoxModernPath.h"
#include "LayoutIntegrationInlineContent.h"
#include "RenderBlockFlow.h"
namespace WebCore {
namespace InlineIterator {
class BoxModernPath;
class LineIteratorModernPath {
public:
LineIteratorModernPath(const LayoutIntegration::InlineContent& inlineContent, size_t lineIndex)
: m_inlineContent(&inlineContent)
, m_lineIndex(lineIndex)
{
ASSERT(lineIndex <= lines().size());
}
LineIteratorModernPath(LineIteratorModernPath&&) = default;
LineIteratorModernPath(const LineIteratorModernPath&) = default;
LineIteratorModernPath& operator=(const LineIteratorModernPath&) = default;
LineIteratorModernPath& operator=(LineIteratorModernPath&&) = default;
LayoutUnit top() const { return LayoutUnit::fromFloatRound(line().enclosingContentTop()); }
LayoutUnit bottom() const { return LayoutUnit::fromFloatRound(line().enclosingContentBottom()); }
LayoutUnit lineBoxTop() const { return LayoutUnit::fromFloatRound(line().lineBoxTop()); }
LayoutUnit lineBoxBottom() const { return LayoutUnit::fromFloatRound(line().lineBoxBottom()); }
LayoutUnit selectionTop() const { return !m_lineIndex ? top() : LineIteratorModernPath(*m_inlineContent, m_lineIndex - 1).selectionBottom(); }
// FIXME: Remove the containingBlock().borderAndPaddingBefore() offset after retiring legacy line layout. It also requires changes in RenderText::positionForPoint to find the first line with offset.
// - the "before" value is already factored in to the line offset
// - this logic negates the first line's natural offset (e.g. block has no border/padding but the first line has a computed offset).
LayoutUnit selectionTopForHitTesting() const { return !m_lineIndex ? containingBlock().borderAndPaddingBefore() : selectionTop(); };
// FIXME: Implement or replace.
LayoutUnit selectionBottom() const { return bottom(); }
float contentLogicalLeft() const { return line().lineBoxLeft() + line().contentLogicalOffset(); }
float contentLogicalRight() const { return contentLogicalLeft() + line().contentLogicalWidth(); }
float y() const { return lineBoxTop(); }
float logicalHeight() const { return lineBoxBottom() - lineBoxTop(); }
bool isHorizontal() const { return line().isHorizontal(); }
FontBaseline baselineType() const { return line().baselineType(); }
const RenderBlockFlow& containingBlock() const { return m_inlineContent->containingBlock(); }
const LegacyRootInlineBox* legacyRootInlineBox() const { return nullptr; }
void traverseNext()
{
ASSERT(!atEnd());
++m_lineIndex;
}
void traversePrevious()
{
ASSERT(!atEnd());
if (!m_lineIndex) {
setAtEnd();
return;
}
--m_lineIndex;
}
bool operator==(const LineIteratorModernPath& other) const { return m_inlineContent == other.m_inlineContent && m_lineIndex == other.m_lineIndex; }
bool atEnd() const { return m_lineIndex == lines().size(); }
BoxModernPath firstLeafBox() const
{
if (!line().boxCount())
return { *m_inlineContent };
auto runIterator = BoxModernPath { *m_inlineContent, line().firstBoxIndex() };
if (runIterator.box().isInlineBox())
runIterator.traverseNextOnLine();
return runIterator;
}
BoxModernPath lastLeafBox() const
{
auto boxCount = line().boxCount();
if (!boxCount)
return { *m_inlineContent };
auto runIterator = BoxModernPath { *m_inlineContent, line().firstBoxIndex() + boxCount - 1 };
if (runIterator.box().isInlineBox())
runIterator.traversePreviousOnLine();
return runIterator;
}
private:
void setAtEnd() { m_lineIndex = lines().size(); }
const LayoutIntegration::InlineContent::Lines& lines() const { return m_inlineContent->lines; }
const LayoutIntegration::Line& line() const { return lines()[m_lineIndex]; }
RefPtr<const LayoutIntegration::InlineContent> m_inlineContent;
size_t m_lineIndex { 0 };
};
}
}
#endif
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