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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_ASH_INPUT_METHOD_LONGPRESS_DIACRITICS_SUGGESTER_H_
#define CHROME_BROWSER_ASH_INPUT_METHOD_LONGPRESS_DIACRITICS_SUGGESTER_H_
#include <optional>
#include <string>
#include <string_view>
#include "base/containers/fixed_flat_map.h"
#include "chrome/browser/ash/input_method/longpress_suggester.h"
#include "chrome/browser/ash/input_method/suggestion_enums.h"
#include "ui/events/event.h"
#include "ui/events/keycodes/dom/dom_code.h"
#include "ui/gfx/range/range.h"
namespace ash::input_method {
class SuggestionHandlerInterface;
inline constexpr std::u16string_view kDiacriticsSeperator = u";";
inline constexpr ui::DomCode kNextDomCode = ui::DomCode::ARROW_RIGHT;
inline constexpr ui::DomCode kPreviousDomCode = ui::DomCode::ARROW_LEFT;
inline constexpr ui::DomCode kAcceptDomCode = ui::DomCode::ENTER;
inline constexpr ui::DomCode kDismissDomCode = ui::DomCode::ESCAPE;
inline constexpr ui::DomCode kTabDomCode = ui::DomCode::TAB;
// Must match IMEPKLongpressDiacriticAction in
// tools/metrics/histograms/enums.xml
enum class IMEPKLongpressDiacriticAction {
kShowWindow = 0,
kAccept = 1,
kDismiss = 2,
kAutoRepeatSuppressed = 3,
kMaxValue = kAutoRepeatSuppressed,
};
class LongpressDiacriticsSuggester : public LongpressSuggester {
public:
explicit LongpressDiacriticsSuggester(
SuggestionHandlerInterface* suggestion_handler_);
~LongpressDiacriticsSuggester() override;
bool TrySuggestOnLongpress(char key_character);
void SetEngineId(const std::string& engine_id);
// Whether or not the given character has possible diacritic suggestion in the
// current layout engine.
bool HasDiacriticSuggestions(char c);
// Suggester overrides:
SuggestionStatus HandleKeyEvent(const ui::KeyEvent& event) override;
bool TrySuggestWithSurroundingText(const std::u16string& text,
gfx::Range selection_range) override;
bool AcceptSuggestion(size_t index) override;
void DismissSuggestion() override;
AssistiveType GetProposeActionType() override;
private:
void ShowDiacriticsNudge();
void SetButtonHighlighted(size_t index, bool highlighted);
std::vector<std::u16string> GetCurrentShownDiacritics();
// LongpressSuggester:
void Reset() override;
// nullopt if no suggestion window shown.
std::optional<char> displayed_window_base_character_;
// Highlighted index can be nullopt even if window displayed.
std::optional<size_t> highlighted_index_;
// Current engine id
std::string engine_id_ = "";
};
} // namespace ash::input_method
#endif // CHROME_BROWSER_ASH_INPUT_METHOD_LONGPRESS_DIACRITICS_SUGGESTER_H_
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