Do not require restart after decoration option change

doc/help/settings.asciidoc

@@ -3157,7 +3157,7 @@ Default:
 - +pass:[utm_term]+
 - +pass:[utm_content]+
 
-[[window.hide_wayland_decoration]]
+[[window.hide_decoration]]
 === window.hide_decoration
 Hide the window decoration.
 This setting requires a restart.

qutebrowser/config/.#configfiles.py

@@ -0,0 +1 @@
+rw@domper.local.3624

qutebrowser/config/configdata.yml

@@ -1536,8 +1536,10 @@ url.yank_ignored_parameters:
 window.hide_decoration:
   type: Bool
   default: false
-  restart: true
+  restart: false
-  desc: Hide the window decoration.
+  desc: |
+    Hide the window decoration. Does require a restart for
+    Wayland users.
 
 window.title_format:
   type:

qutebrowser/config/configinit.py

@@ -90,6 +90,9 @@ def _init_envvars():
     if config.val.qt.force_platform is not None:
         os.environ['QT_QPA_PLATFORM'] = config.val.qt.force_platform
 
+    if config.val.window.hide_wayland_decoration:
+        os.environ['QT_WAYLAND_DISABLE_WINDOWDECORATION'] = '1'
+
     if config.val.qt.highdpi:
         os.environ['QT_AUTO_SCREEN_SCALE_FACTOR'] = '1'
 

qutebrowser/mainwindow/mainwindow.py

@@ -169,9 +169,6 @@ class MainWindow(QWidget):
         objreg.register('message-bridge', message_bridge, scope='window',
                         window=self.win_id)
 
-        if config.val.window.hide_decoration:
-            window_flags = Qt.CustomizeWindowHint | Qt.NoDropShadowWindowHint
-            self.setWindowFlags(Qt.Window | window_flags)
         self.setWindowTitle('qutebrowser')
         self._vbox = QVBoxLayout(self)
         self._vbox.setContentsMargins(0, 0, 0, 0)
@@ -233,6 +230,8 @@ class MainWindow(QWidget):
         config.instance.changed.connect(self._on_config_changed)
 
         objreg.get("app").new_window.emit(self)
+        self._set_decoration(config.val.window.hide_decoration)
+
 
     def _init_geometry(self, geometry):
         """Initialize the window geometry or load it from disk."""
@@ -347,6 +346,8 @@ class MainWindow(QWidget):
         elif option == 'statusbar.position':
             self._add_widgets()
             self._update_overlay_geometries()
+        elif option == 'window.hide_decoration':
+            self._set_decoration(config.val.window.hide_decoration)
 
     def _add_widgets(self):
         """Add or readd all widgets to the VBox."""
@@ -496,6 +497,15 @@ class MainWindow(QWidget):
             completion_obj.on_clear_completion_selection)
         cmd.hide_completion.connect(completion_obj.hide)
 
+    def _set_decoration(self, hidden):
+        """ Set the visibility of the window decoration via Qt."""
+        window_flags = Qt.Window
+        if hidden:
+            window_flags |= Qt.CustomizeWindowHint | Qt.NoDropShadowWindowHint
+        self.setWindowFlags(window_flags)
+        self.hide()
+        self.show()
+
     @pyqtSlot(bool)
     def _on_fullscreen_requested(self, on):
         if not config.val.content.windowed_fullscreen: