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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_ACCESSIBILITY_AX_STYLE_DATA_H_
#define CONTENT_BROWSER_ACCESSIBILITY_AX_STYLE_DATA_H_
#include <optional>
#include <vector>
#include "base/check_op.h"
#include "content/common/content_export.h"
#include "third_party/abseil-cpp/absl/container/flat_hash_map.h"
#include "ui/accessibility/ax_enums.mojom-data-view.h"
namespace content {
// Struct to hold text styling information for accessibility.
struct CONTENT_EXPORT AXStyleData {
public:
// Pairs of start and end indices.
using RangePairs = std::vector<std::pair<int, int>>;
std::optional<absl::flat_hash_map<std::u16string, RangePairs>> suggestions;
// Links with the target url as the map key.
std::optional<absl::flat_hash_map<std::u16string, RangePairs>> links;
std::optional<absl::flat_hash_map<float, RangePairs>> text_sizes;
std::optional<absl::flat_hash_map<ax::mojom::TextStyle, RangePairs>>
text_styles;
std::optional<absl::flat_hash_map<ax::mojom::TextPosition, RangePairs>>
text_positions;
std::optional<absl::flat_hash_map<int, RangePairs>> foreground_colors;
std::optional<absl::flat_hash_map<int, RangePairs>> background_colors;
std::optional<absl::flat_hash_map<std::string, RangePairs>> font_families;
std::optional<absl::flat_hash_map<std::string, RangePairs>> locales;
AXStyleData();
AXStyleData(const AXStyleData&) = delete;
AXStyleData(AXStyleData&&);
~AXStyleData();
AXStyleData& operator=(const AXStyleData&) = delete;
AXStyleData& operator=(AXStyleData&&);
// Adds a range with the given value to the specified field.
// `start` must be less than or equal to `end`. The indices are allowed to be
// negative to allow temporary negative intermediate values. The caller is
// responsible for making sure indices are non-negative by the time they are
// used. This function simply appends the new range to the relevant map value.
// It does not do any sorting, merging, or deduping.
template <class T>
static void AddRange(std::optional<absl::flat_hash_map<T, RangePairs>>& field,
T value,
int start,
int end) {
CHECK_LE(start, end);
if (!field) {
field.emplace();
}
(*field)[std::move(value)].emplace_back(start, end);
}
// Returns a string representation of the style data for testing.
std::string ToStringForTesting() const;
};
} // namespace content
#endif // CONTENT_BROWSER_ACCESSIBILITY_AX_STYLE_DATA_H_
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