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Telegram/SourceFiles/chat_helpers/emoji_suggestions_widget.h

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+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#pragma once
+
+#include "ui/effects/animations.h"
+#include "ui/rp_widget.h"
+#include "base/unique_qptr.h"
+#include "base/timer.h"
+
+#include <QtWidgets/QTextEdit>
+
+namespace style {
+struct EmojiSuggestions;
+} // namespace style
+
+namespace Main {
+class Session;
+} // namespace Main
+
+namespace Ui {
+class InnerDropdown;
+class InputField;
+} // namespace Ui
+
+namespace Ui::Text {
+class CustomEmoji;
+} // namespace Ui::Text
+
+namespace Ui::Emoji {
+
+class SuggestionsWidget;
+
+using SuggestionsQuery = std::variant<QString, EmojiPtr>;
+
+class SuggestionsController final : public QObject {
+public:
+	struct Options {
+		bool suggestExactFirstWord = true;
+		bool suggestCustomEmoji = false;
+		Fn<bool(not_null<DocumentData*>)> allowCustomWithoutPremium;
+		const style::EmojiSuggestions *st = nullptr;
+	};
+
+	SuggestionsController(
+		not_null<QWidget*> parent,
+		not_null<QWidget*> outer,
+		not_null<QTextEdit*> field,
+		not_null<Main::Session*> session,
+		const Options &options);
+
+	void raise();
+	void setReplaceCallback(Fn<void(
+		int from,
+		int till,
+		const QString &replacement,
+		const QString &customEmojiData)> callback);
+
+	static not_null<SuggestionsController*> Init(
+			not_null<QWidget*> outer,
+			not_null<Ui::InputField*> field,
+			not_null<Main::Session*> session) {
+		return Init(outer, field, session, {});
+	}
+	static not_null<SuggestionsController*> Init(
+		not_null<QWidget*> outer,
+		not_null<Ui::InputField*> field,
+		not_null<Main::Session*> session,
+		const Options &options);
+
+private:
+	void handleCursorPositionChange();
+	void handleTextChange();
+	void showWithQuery(SuggestionsQuery query);
+	[[nodiscard]] SuggestionsQuery getEmojiQuery();
+	void suggestionsUpdated(bool visible);
+	void updateGeometry();
+	void updateForceHidden();
+	void replaceCurrent(
+		const QString &replacement,
+		const QString &customEmojiData);
+	bool fieldFilter(not_null<QEvent*> event);
+	bool outerFilter(not_null<QEvent*> event);
+
+	const style::EmojiSuggestions &_st;
+	bool _shown = false;
+	bool _forceHidden = false;
+	int _queryStartPosition = 0;
+	int _emojiQueryLength = 0;
+	bool _ignoreCursorPositionChange = false;
+	bool _textChangeAfterKeyPress = false;
+	QPointer<QTextEdit> _field;
+	const not_null<Main::Session*> _session;
+	Fn<void(
+		int from,
+		int till,
+		const QString &replacement,
+		const QString &customEmojiData)> _replaceCallback;
+	base::unique_qptr<InnerDropdown> _container;
+	QPointer<SuggestionsWidget> _suggestions;
+	base::unique_qptr<QObject> _fieldFilter;
+	base::unique_qptr<QObject> _outerFilter;
+	base::Timer _showExactTimer;
+	bool _keywordsRefreshed = false;
+	SuggestionsQuery _lastShownQuery;
+	Options _options;
+
+	rpl::lifetime _lifetime;
+
+};
+
+} // namespace Ui::Emoji