Don't watch theme file while using theme editor.

Telegram/SourceFiles/window/themes/window_theme.cpp

@@ -569,22 +569,7 @@ void ChatBackground::start() {
 
 	_updates.events(
 	) | rpl::start_with_next([=](const BackgroundUpdate &update) {
-		if (const auto path = _themeObject.pathAbsolute
-			; !path.isEmpty() && QFileInfo(path).isNativePath()) {
-			if (!_themeWatcher || !_themeWatcher->files().contains(path)) {
-				_themeWatcher = std::make_unique<QFileSystemWatcher>(
-					QStringList(path));
-				QObject::connect(
-					_themeWatcher.get(),
-					&QFileSystemWatcher::fileChanged,
-					[](const QString &path) {
-						Apply(path);
-						KeepApplied();
-					});
-			}
-		} else {
-			_themeWatcher = nullptr;
-		}
+		refreshThemeWatcher();
 		if (update.paletteChanged()) {
 			style::NotifyPaletteChanged();
 		}
@@ -603,6 +588,25 @@ void ChatBackground::start() {
 	Core::App().settings().setSystemDarkMode(Platform::IsDarkMode());
 }
 
+void ChatBackground::refreshThemeWatcher() {
+	const auto path = _themeObject.pathAbsolute;
+	if (path.isEmpty()
+		|| !QFileInfo(path).isNativePath()
+		|| editingTheme()) {
+		_themeWatcher = nullptr;
+	} else if (!_themeWatcher || !_themeWatcher->files().contains(path)) {
+		_themeWatcher = std::make_unique<QFileSystemWatcher>(
+			QStringList(path));
+		QObject::connect(
+			_themeWatcher.get(),
+			&QFileSystemWatcher::fileChanged,
+			[](const QString &path) {
+			Apply(path);
+			KeepApplied();
+		});
+	}
+}
+
 void ChatBackground::checkUploadWallPaper() {
 	if (!_session) {
 		_wallPaperUploadLifetime = rpl::lifetime();
@@ -826,6 +830,7 @@ std::optional<Data::CloudTheme> ChatBackground::editingTheme() const {
 
 void ChatBackground::setEditingTheme(const Data::CloudTheme &editing) {
 	_editingTheme = editing;
+	refreshThemeWatcher();
 }
 
 void ChatBackground::clearEditingTheme(ClearEditing clear) {
@@ -841,6 +846,7 @@ void ChatBackground::clearEditingTheme(ClearEditing clear) {
 		reapplyWithNightMode(std::nullopt, _nightMode);
 		KeepApplied();
 	}
+	refreshThemeWatcher();
 }
 
 void ChatBackground::adjustPaletteUsingBackground(const QImage &image) {

Telegram/SourceFiles/window/themes/window_theme.h

@@ -243,6 +243,7 @@ private:
 	[[nodiscard]] bool isNonDefaultBackground();
 	void checkUploadWallPaper();
 	[[nodiscard]] QImage postprocessBackgroundImage(QImage image);
+	void refreshThemeWatcher();
 
 	friend bool IsNightMode();
 	friend void SetNightModeValue(bool nightMode);