Redesign languages box with a search filter.

Telegram/SourceFiles/storage/localstorage.cpp

@@ -24,6 +24,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "mainwidget.h"
 #include "mainwindow.h"
 #include "lang/lang_keys.h"
+#include "lang/lang_cloud_manager.h"
 #include "media/media_audio.h"
 #include "mtproto/dc_options.h"
 #include "messenger.h"
@@ -599,6 +600,7 @@ enum {
 	dbiAnimationsDisabled = 0x57,
 	dbiScalePercent = 0x58,
 	dbiPlaybackSpeed = 0x59,
+	dbiLanguagesKey = 0x5a,
 
 	dbiEncryptedWithSalt = 333,
 	dbiEncrypted = 444,
@@ -664,6 +666,7 @@ FileKey _exportSettingsKey = 0;
 
 FileKey _savedPeersKey = 0;
 FileKey _langPackKey = 0;
+FileKey _languagesKey = 0;
 
 bool _mapChanged = false;
 int32 _oldMapVersion = 0, _oldSettingsVersion = 0;
@@ -1354,6 +1357,14 @@ bool _readSetting(quint32 blockId, QDataStream &stream, int version, ReadSetting
 		_langPackKey = langPackKey;
 	} break;
 
+	case dbiLanguagesKey: {
+		quint64 languagesKey = 0;
+		stream >> languagesKey;
+		if (!_checkStreamStatus(stream)) return false;
+
+		_languagesKey = languagesKey;
+	} break;
+
 	case dbiTryIPv6: {
 		qint32 v;
 		stream >> v;
@@ -2629,6 +2640,9 @@ void writeSettings() {
 	if (_langPackKey) {
 		data.stream << quint32(dbiLangPackKey) << quint64(_langPackKey);
 	}
+	if (_languagesKey) {
+		data.stream << quint32(dbiLanguagesKey) << quint64(_languagesKey);
+	}
 
 	auto position = cWindowPos();
 	data.stream << quint32(dbiWindowPosition) << qint32(position.x) << qint32(position.y) << qint32(position.w) << qint32(position.h);
@@ -4117,6 +4131,74 @@ void writeLangPack() {
 	file.writeEncrypted(data, SettingsKey);
 }
 
+void pushRecentLanguage(const Lang::Language &language) {
+	if (language.id.startsWith('#')) {
+		return;
+	}
+	auto list = readRecentLanguages();
+	list.erase(
+		ranges::remove_if(
+			list,
+			[&](const Lang::Language &v) { return (v.id == language.id); }),
+		list.end());
+	list.insert(list.begin(), language);
+
+	auto size = sizeof(qint32);
+	for (const auto &language : list) {
+		size += Serialize::stringSize(language.id)
+			+ Serialize::stringSize(language.pluralId)
+			+ Serialize::stringSize(language.baseId)
+			+ Serialize::stringSize(language.name)
+			+ Serialize::stringSize(language.nativeName);
+	}
+	if (!_languagesKey) {
+		_languagesKey = genKey(FileOption::Safe);
+		writeSettings();
+	}
+
+	EncryptedDescriptor data(size);
+	data.stream << qint32(list.size());
+	for (const auto &language : list) {
+		data.stream
+			<< language.id
+			<< language.pluralId
+			<< language.baseId
+			<< language.name
+			<< language.nativeName;
+	}
+
+	FileWriteDescriptor file(_languagesKey, FileOption::Safe);
+	file.writeEncrypted(data, SettingsKey);
+}
+
+QVector<Lang::Language> readRecentLanguages() {
+	FileReadDescriptor languages;
+	if (!_languagesKey || !readEncryptedFile(languages, _languagesKey, FileOption::Safe, SettingsKey)) {
+		return {};
+	}
+	qint32 count = 0;
+	languages.stream >> count;
+	if (count <= 0) {
+		return {};
+	}
+	auto result = QVector<Lang::Language>();
+	result.reserve(count);
+	for (auto i = 0; i != count; ++i) {
+		auto language = Lang::Language();
+		languages.stream
+			>> language.id
+			>> language.pluralId
+			>> language.baseId
+			>> language.name
+			>> language.nativeName;
+		result.push_back(language);
+	}
+	if (languages.stream.status() != QDataStream::Ok) {
+		return {};
+	}
+	return result;
+}
+
 bool copyThemeColorsToPalette(const QString &path) {
 	auto &themeKey = Window::Theme::IsNightMode()
 		? _themeKeyNight