init

Telegram/SourceFiles/lang/lang_instance.h

@@ -0,0 +1,161 @@
+/*
+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 "lang_auto.h"
+#include "base/const_string.h"
+#include "base/weak_ptr.h"
+
+namespace Lang {
+
+inline constexpr auto kChoosingStickerReplacement = "oo"_cs;
+
+struct Language {
+	QString id;
+	QString pluralId;
+	QString baseId;
+	QString name;
+	QString nativeName;
+};
+
+inline bool operator==(const Language &a, const Language &b) {
+	return (a.id == b.id) && (a.name == b.name);
+}
+
+inline bool operator!=(const Language &a, const Language &b) {
+	return !(a == b);
+}
+
+QString CloudLangPackName();
+QString CustomLanguageId();
+Language DefaultLanguage();
+
+class Instance;
+Instance &GetInstance();
+
+enum class Pack {
+	None,
+	Current,
+	Base,
+};
+
+class Instance {
+	struct PrivateTag;
+
+public:
+	Instance();
+	Instance(not_null<Instance*> derived, const PrivateTag &);
+
+	void switchToId(const Language &language);
+	void switchToCustomFile(const QString &filePath);
+
+	Instance(const Instance &other) = delete;
+	Instance &operator=(const Instance &other) = delete;
+	Instance(Instance &&other) = default;
+	Instance &operator=(Instance &&other) = default;
+
+	QString systemLangCode() const;
+	QString langPackName() const;
+	QString cloudLangCode(Pack pack) const;
+	QString id() const;
+	rpl::producer<QString> idChanges() const;
+	QString baseId() const;
+	QString name() const;
+	QString nativeName() const;
+	QString id(Pack pack) const;
+	bool isCustom() const;
+	int version(Pack pack) const;
+
+	QByteArray serialize() const;
+	void fillFromSerialized(const QByteArray &data, int dataAppVersion);
+
+	bool supportChoosingStickerReplacement() const;
+	int rightIndexChoosingStickerReplacement(bool named) const;
+
+	void applyDifference(
+		Pack pack,
+		const MTPDlangPackDifference &difference);
+	static std::map<ushort, QString> ParseStrings(
+		const MTPVector<MTPLangPackString> &strings);
+
+	[[nodiscard]] rpl::producer<> updated() const {
+		return _updated.events();
+	}
+
+	QString getValue(ushort key) const {
+		Expects(key < _values.size());
+
+		return _values[key];
+	}
+	QString getNonDefaultValue(const QByteArray &key) const;
+	bool isNonDefaultPlural(ushort key) const {
+		Expects(key + 5 < _nonDefaultSet.size());
+
+		return _nonDefaultSet[key]
+			|| _nonDefaultSet[key + 1]
+			|| _nonDefaultSet[key + 2]
+			|| _nonDefaultSet[key + 3]
+			|| _nonDefaultSet[key + 4]
+			|| _nonDefaultSet[key + 5]
+			|| (_base && _base->isNonDefaultPlural(key));
+	}
+
+private:
+	void setBaseId(const QString &baseId, const QString &pluralId);
+
+	void applyDifferenceToMe(const MTPDlangPackDifference &difference);
+	void applyValue(const QByteArray &key, const QByteArray &value);
+	void resetValue(const QByteArray &key);
+	void reset(const Language &language);
+	void fillFromCustomContent(
+		const QString &absolutePath,
+		const QString &relativePath,
+		const QByteArray &content);
+	bool loadFromCustomFile(const QString &filePath);
+	void loadFromContent(const QByteArray &content);
+	void loadFromCustomContent(
+		const QString &absolutePath,
+		const QString &relativePath,
+		const QByteArray &content);
+	void updatePluralRules();
+	void updateChoosingStickerReplacement();
+
+	Instance *_derived = nullptr;
+
+	QString _id, _pluralId;
+	rpl::event_stream<QString> _idChanges;
+	QString _name, _nativeName;
+	QString _customFilePathAbsolute;
+	QString _customFilePathRelative;
+	QByteArray _customFileContent;
+	int _version = 0;
+	rpl::event_stream<> _updated;
+
+	struct {
+		bool support = false;
+		int rightIndex = 0;
+		int rightIndexNamed = 0;
+	} _choosingStickerReplacement;
+
+	mutable QString _systemLanguage;
+
+	std::vector<QString> _values;
+	std::vector<uchar> _nonDefaultSet;
+	std::map<QByteArray, QByteArray> _nonDefaultValues;
+
+	std::unique_ptr<Instance> _base;
+
+};
+
+namespace details {
+
+QString Current(ushort key);
+rpl::producer<QString> Value(ushort key);
+
+} // namespace details
+} // namespace Lang