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// 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_PLATFORM_FONTS_SHAPING_SHAPE_RESULT_BUFFER_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_SHAPING_SHAPE_RESULT_BUFFER_H_
#include "third_party/blink/renderer/platform/fonts/shaping/shape_result.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_vector.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
namespace blink {
struct CharacterRange;
class FontDescription;
struct GlyphData;
class ShapeResultBloberizer;
class TextRun;
class PLATFORM_EXPORT ShapeResultBuffer {
STACK_ALLOCATED();
public:
ShapeResultBuffer() : has_vertical_offsets_(false) {}
ShapeResultBuffer(const ShapeResultBuffer&) = delete;
ShapeResultBuffer& operator=(const ShapeResultBuffer&) = delete;
void AppendResult(const ShapeResult* result) {
has_vertical_offsets_ |= result->HasVerticalOffsets();
results_.push_back(result);
}
bool HasVerticalOffsets() const { return has_vertical_offsets_; }
int OffsetForPosition(const TextRun& run,
float target_x,
IncludePartialGlyphsOption,
BreakGlyphsOption) const;
CharacterRange GetCharacterRange(const StringView& text,
TextDirection,
float total_width,
unsigned from,
unsigned to) const;
HeapVector<ShapeResult::RunFontData> GetRunFontData() const;
wtf_size_t ShapeResultSize() const { return results_.size(); }
ShapeResultView* ViewAt(wtf_size_t index) const;
GlyphData EmphasisMarkGlyphData(const FontDescription&) const;
struct CharacterRangeContext {
const StringView& text;
const bool is_rtl;
int from;
int to;
float current_x;
unsigned total_num_characters = 0;
std::optional<float> from_x;
std::optional<float> to_x;
float min_y = 0;
float max_y = 0;
};
// A helper for GetCharacterRange().
static void ComputeRangeIn(const ShapeResult& result,
const gfx::RectF& ink_bounds,
CharacterRangeContext& context);
private:
friend class ShapeResultBloberizer;
// Empirically, cases where we get more than 50 ShapeResults are extremely
// rare.
HeapVector<Member<const ShapeResult>, 64> results_;
bool has_vertical_offsets_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_SHAPING_SHAPE_RESULT_BUFFER_H_
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