Add fullscreen mode

data/menu.ui

@@ -199,7 +199,7 @@ along with PDF Arranger.  If not, see <http://www.gnu.org/licenses/>.
       </section>
     </submenu>
     <submenu>
-      <attribute name="label" translatable="yes">_Zoom</attribute>
+      <attribute name="label" translatable="yes">_View</attribute>
       <section>
         <item>
           <attribute name="label" translatable="yes">Zoom _In</attribute>
@@ -213,6 +213,10 @@ along with PDF Arranger.  If not, see <http://www.gnu.org/licenses/>.
           <attribute name="label" translatable="yes">Zoom _Fit</attribute>
           <attribute name="action">win.zoom-fit</attribute>
         </item>
+        <item>
+          <attribute name="label" translatable="yes">Full_screen</attribute>
+          <attribute name="action">win.fullscreen</attribute>
+        </item>
       </section>
     </submenu>
     <section>

pdfarranger/config.py

@@ -39,6 +39,7 @@
     ('zoom-in', 'plus KP_Add <Primary>plus <Primary>KP_Add'),
     ('zoom-out', 'minus KP_Subtract <Primary>minus <Primary>KP_Subtract'),
     ('zoom-fit', 'f'),
+    ('fullscreen', 'F11'),
     ('undo', '<Primary>z'),
     ('redo', '<Primary>y'),
     ('cut', '<Primary>x'),

pdfarranger/pdfarranger.py

@@ -361,6 +361,7 @@ def __create_actions(self):
             ('zoom-in', self.on_action_zoom_in),
             ('zoom-out', self.on_action_zoom_out),
             ('zoom-fit', self.on_action_zoom_fit),
+            ('fullscreen', self.on_action_fullscreen),
             ('close', self.on_action_close),
             ('quit', self.on_quit),
             ('undo', self.undomanager.undo),
@@ -2067,6 +2068,16 @@ def on_action_zoom_fit(self, _action=None, _param=None, _unknown=None):
             self.zoom_fit_page = True
             self.zoom_fit(path)
 
+    def on_action_fullscreen(self, _action, _param, _unknown):
+        """Toggle fullscreen mode."""
+        header_bar = self.uiXML.get_object('header_bar')
+        if header_bar.get_visible():
+            self.window.fullscreen()
+            header_bar.hide()
+        else:
+            self.window.unfullscreen()
+            header_bar.show()
+
     def scroll_to_selection(self):
         """Scroll iconview so that selection is in center of window."""
         self.id_scroll_to_sel = None