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/*
* Copyright (C) 2018-2024 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 "InlineDisplayContent.h"
#include "InlineItem.h"
#include "LineLayoutResult.h"
#include <wtf/HashMap.h>
namespace WebCore {
namespace Layout {
// InlineContentCache is used to cache content for subsequent layouts.
class InlineContentCache {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(InlineContentCache);
public:
struct InlineItems {
InlineItemList& content() { return m_inlineItemList; }
const InlineItemList& content() const { return m_inlineItemList; }
struct ContentAttributes {
bool requiresVisualReordering { false };
// Note that <span>this is text</span> returns true as inline boxes are not considered 'content' here.
bool hasTextAndLineBreakOnlyContent { false };
bool hasTextAutospace { false };
size_t inlineBoxCount { 0 };
};
enum class IsPopulatedFromCache : bool { No, Yes };
void set(InlineItemList&&, ContentAttributes, IsPopulatedFromCache);
void replace(size_t insertionPosition, InlineItemList&&, ContentAttributes, IsPopulatedFromCache);
void shrinkToFit() { m_inlineItemList.shrinkToFit(); }
bool isEmpty() const { return content().isEmpty(); }
size_t size() const { return content().size(); }
bool requiresVisualReordering() const { return m_contentAttributes.requiresVisualReordering; }
bool hasTextAndLineBreakOnlyContent() const { return m_contentAttributes.hasTextAndLineBreakOnlyContent; }
bool hasTextAutospace() const { return m_contentAttributes.hasTextAutospace; }
bool hasInlineBoxes() const { return !!inlineBoxCount(); }
size_t inlineBoxCount() const { return m_contentAttributes.inlineBoxCount; }
bool isPopulatedFromCache() const { return m_isPopulatedFromCache; }
private:
ContentAttributes m_contentAttributes;
InlineItemList m_inlineItemList;
bool m_isPopulatedFromCache { false };
};
const InlineItems& inlineItems() const { return m_inlineItems; }
InlineItems& inlineItems() { return m_inlineItems; }
void setMaximumIntrinsicWidthLineContent(LineLayoutResult&& lineContent) { m_maximumIntrinsicWidthLineContent = WTFMove(lineContent); }
void clearMaximumIntrinsicWidthLineContent() { m_maximumIntrinsicWidthLineContent = { }; }
std::optional<LineLayoutResult>& maximumIntrinsicWidthLineContent() { return m_maximumIntrinsicWidthLineContent; }
void setMinimumContentSize(InlineLayoutUnit minimumContentSize) { m_minimumContentSize = minimumContentSize; }
void setMaximumContentSize(InlineLayoutUnit maximumContentSize) { m_maximumContentSize = maximumContentSize; }
std::optional<InlineLayoutUnit> minimumContentSize() const { return m_minimumContentSize; }
std::optional<InlineLayoutUnit> maximumContentSize() const { return m_maximumContentSize; }
void resetMinimumMaximumContentSizes();
const InlineBoxBoundaryTextSpacings& inlineBoxBoundaryTextSpacings() const { return m_textSpacingContext.inlineBoxBoundaryTextSpacings; }
void setInlineBoxBoundaryTextSpacings(InlineBoxBoundaryTextSpacings&& spacings) { m_textSpacingContext.inlineBoxBoundaryTextSpacings = WTFMove(spacings); }
const TrimmableTextSpacings& trimmableTextSpacings() const { return m_textSpacingContext.trimmableTextSpacings; }
void setTrimmableTextSpacings(TrimmableTextSpacings&& spacings) { m_textSpacingContext.trimmableTextSpacings = WTFMove(spacings); }
const TextSpacingContext& textSpacingContext() const { return m_textSpacingContext; }
private:
InlineItems m_inlineItems;
TextSpacingContext m_textSpacingContext;
std::optional<LineLayoutResult> m_maximumIntrinsicWidthLineContent { };
std::optional<InlineLayoutUnit> m_minimumContentSize { };
std::optional<InlineLayoutUnit> m_maximumContentSize { };
};
inline void InlineContentCache::resetMinimumMaximumContentSizes()
{
m_minimumContentSize = { };
m_maximumContentSize = { };
m_maximumIntrinsicWidthLineContent = { };
}
inline void InlineContentCache::InlineItems::set(InlineItemList&& inlineItemList, ContentAttributes contentAttributes, IsPopulatedFromCache isPopulatedFromCache)
{
m_inlineItemList = WTFMove(inlineItemList);
m_contentAttributes = contentAttributes;
m_isPopulatedFromCache = isPopulatedFromCache == IsPopulatedFromCache::Yes;
}
inline void InlineContentCache::InlineItems::replace(size_t insertionPosition, InlineItemList&& inlineItemList, ContentAttributes contentAttributes, IsPopulatedFromCache isPopulatedFromCache)
{
m_inlineItemList.remove(insertionPosition, m_inlineItemList.size() - insertionPosition);
m_inlineItemList.appendVector(WTFMove(inlineItemList));
m_contentAttributes = contentAttributes;
if (isPopulatedFromCache == IsPopulatedFromCache::No)
m_isPopulatedFromCache = false;
}
}
}
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