chromium/ui/accessibility/ax_text_utils.cc

// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "ui/accessibility/ax_text_utils.h"

#include <algorithm>
#include <optional>

#include "base/check_op.h"
#include "base/i18n/break_iterator.h"
#include "base/notreached.h"
#include "base/numerics/safe_conversions.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "ui/accessibility/ax_enums.mojom.h"

namespace ui {

namespace {

base::i18n::BreakIterator::BreakType ICUBreakTypeForBoundaryType(
    ax::mojom::TextBoundary boundary) { … }

}  // namespace

// line_breaks is a Misnomer. Blink provides the start offsets of each line
// not the line breaks.
// TODO(nektar): Rename line_breaks a11y attribute and variable references.
size_t FindAccessibleTextBoundary(const std::u16string& text,
                                  const std::vector<int>& line_breaks,
                                  ax::mojom::TextBoundary boundary,
                                  size_t start_offset,
                                  ax::mojom::MoveDirection direction,
                                  ax::mojom::TextAffinity affinity) { … }

std::vector<int> GetWordStartOffsets(const std::u16string& text) { … }

std::vector<int> GetWordEndOffsets(const std::u16string& text) { … }

std::vector<int> GetSentenceStartOffsets(const std::u16string& text) { … }

std::vector<int> GetSentenceEndOffsets(const std::u16string& text) { … }
}  // namespace ui