chromium/third_party/blink/renderer/core/layout/inline/inline_items_builder.h

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_INLINE_INLINE_ITEMS_BUILDER_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_INLINE_INLINE_ITEMS_BUILDER_H_

#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/layout/inline/empty_offset_mapping_builder.h"
#include "third_party/blink/renderer/core/layout/inline/inline_item.h"
#include "third_party/blink/renderer/core/layout/inline/offset_mapping_builder.h"
#include "third_party/blink/renderer/core/layout/layout_block_flow.h"
#include "third_party/blink/renderer/core/layout/svg/svg_inline_node_data.h"
#include "third_party/blink/renderer/platform/fonts/font_height.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/text/string_builder.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"

namespace blink {

class ComputedStyle;
class LayoutInline;
class LayoutObject;
class LayoutText;
class TransformedString;
struct InlineNodeData;

// InlineItemsBuilder builds a string and a list of InlineItem from inlines.
//
// When appending, spaces are collapsed according to CSS Text, The white space
// processing rules
// https://drafts.csswg.org/css-text-3/#white-space-rules
//
// By calling EnterInline/ExitInline, it inserts bidirectional control
// characters as defined in:
// https://drafts.csswg.org/css-writing-modes-3/#bidi-control-codes-injection-table
//
// InlineItemsBuilder may optionally take an OffsetMappingBuilder template
// parameter to construct the white-space collapsed offset mapping, which maps
// offsets in the concatenation of all appended strings and characters to
// offsets in |text_|.
// See https://goo.gl/CJbxky for more details about offset mapping.
template <typename MappingBuilder>
class InlineItemsBuilderTemplate { … };

template <>
CORE_EXPORT bool
InlineItemsBuilderTemplate<OffsetMappingBuilder>::AppendTextReusing(
    const InlineNodeData&,
    LayoutText*);

template <>
CORE_EXPORT bool InlineItemsBuilderTemplate<
    OffsetMappingBuilder>::ShouldUpdateLayoutObject() const;

template <>
CORE_EXPORT void
InlineItemsBuilderTemplate<OffsetMappingBuilder>::ClearInlineFragment(
    LayoutObject*);

template <>
CORE_EXPORT void
InlineItemsBuilderTemplate<OffsetMappingBuilder>::ClearNeedsLayout(
    LayoutObject*);

template <>
CORE_EXPORT void
InlineItemsBuilderTemplate<OffsetMappingBuilder>::UpdateShouldCreateBoxFragment(
    LayoutInline*);

extern template class CORE_EXTERN_TEMPLATE_EXPORT
    InlineItemsBuilderTemplate<EmptyOffsetMappingBuilder>;
extern template class CORE_EXTERN_TEMPLATE_EXPORT
    InlineItemsBuilderTemplate<OffsetMappingBuilder>;

InlineItemsBuilder;
InlineItemsBuilderForOffsetMapping;

}  // namespace blink

WTF_ALLOW_CLEAR_UNUSED_SLOTS_WITH_MEM_FUNCTIONS(…)
WTF_ALLOW_CLEAR_UNUSED_SLOTS_WITH_MEM_FUNCTIONS(…)
WTF_ALLOW_CLEAR_UNUSED_SLOTS_WITH_MEM_FUNCTIONS(…)
WTF_ALLOW_CLEAR_UNUSED_SLOTS_WITH_MEM_FUNCTIONS(…)

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_LAYOUT_INLINE_INLINE_ITEMS_BUILDER_H_