Use temp directory for downloads in Linux sandbox by default

Telegram/Resources/langs/lang.strings

@@ -755,7 +755,6 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_download_path" = "Download path";
 "lng_download_path_temp" = "Temp folder";
 "lng_download_path_default" = "Default folder";
-"lng_download_path_unset" = "Unset";
 "lng_download_path_clear" = "Clear all";
 "lng_download_path_header" = "Choose download path";
 "lng_download_path_default_radio" = "Telegram folder in system «Downloads»";

Telegram/SourceFiles/boxes/download_path_box.cpp

@@ -147,7 +147,9 @@ void DownloadPathBox::setPathText(const QString &text) {
 DownloadPathBox::Directory DownloadPathBox::typeFromPath(
 		const QString &path) {
 	if (path.isEmpty()) {
-		return Directory::Downloads;
+		return Core::App().canReadDefaultDownloadPath(true)
+			? Directory::Downloads
+			: Directory::Temp;
 	} else if (path == FileDialog::Tmp()) {
 		return Directory::Temp;
 	}

Telegram/SourceFiles/core/application.cpp

@@ -252,15 +252,6 @@ void Application::run() {
 		return;
 	}
 
-	if (KSandbox::isInside()) {
-		const auto path = settings().downloadPath();
-		if (!path.isEmpty()
-			&& path != FileDialog::Tmp()
-			&& !base::CanReadDirectory(path)) {
-			settings().setDownloadPath(QString());
-		}
-	}
-
 	_translator = std::make_unique<Lang::Translator>();
 	QCoreApplication::instance()->installTranslator(_translator.get());
 
@@ -606,8 +597,7 @@ bool Application::canReadDefaultDownloadPath(bool always) const {
 }
 
 bool Application::canSaveFileWithoutAskingForPath() const {
-	return !Core::App().settings().askDownloadPath()
-		&& canReadDefaultDownloadPath();
+	return !Core::App().settings().askDownloadPath();
 }
 
 MTP::Config &Application::fallbackProductionConfig() const {

Telegram/SourceFiles/core/file_utilities.cpp

@@ -9,6 +9,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 
 #include "boxes/abstract_box.h"
 #include "storage/localstorage.h"
+#include "storage/storage_account.h"
 #include "base/platform/base_platform_info.h"
 #include "base/platform/base_platform_file_utilities.h"
 #include "platform/platform_file_utilities.h"
@@ -171,31 +172,14 @@ QString DefaultDownloadPathFolder(not_null<Main::Session*> session) {
 }
 
 QString DefaultDownloadPath(not_null<Main::Session*> session) {
-	const auto realDefaultPath = QStandardPaths::writableLocation(
+	if (!Core::App().canReadDefaultDownloadPath()) {
+		return session->local().tempDirectory();
+	}
+	return QStandardPaths::writableLocation(
 		QStandardPaths::DownloadLocation)
 		+ '/'
 		+ DefaultDownloadPathFolder(session)
 		+ '/';
-	if (!Core::App().canReadDefaultDownloadPath()) {
-		QStringList files;
-		QByteArray remoteContent;
-		const auto success = Platform::FileDialog::Get(
-			nullptr,
-			files,
-			remoteContent,
-			tr::lng_download_path_choose(tr::now),
-			QString(),
-			FileDialog::internal::Type::ReadFolder,
-			realDefaultPath);
-		if (success && !files.isEmpty() && !files[0].isEmpty()) {
-			const auto result = files[0].endsWith('/') ? files[0] : (files[0] + '/');
-			Core::App().settings().setDownloadPath(result);
-			Core::App().saveSettings();
-			return result;
-		}
-		return QString();
-	}
-	return realDefaultPath;
 }
 
 namespace internal {

Telegram/SourceFiles/settings/settings_chat.cpp

@@ -1057,7 +1057,7 @@ void SetupDataStorage(
 		if (text.isEmpty()) {
 			return Core::App().canReadDefaultDownloadPath(true)
 				? tr::lng_download_path_default(tr::now)
-				: tr::lng_download_path_unset(tr::now);
+				: tr::lng_download_path_temp(tr::now);
 		} else if (text == FileDialog::Tmp()) {
 			return tr::lng_download_path_temp(tr::now);
 		}