Move panel hiding to the shell clients

src/Gestures/GestureTracker.vala

@@ -204,18 +204,16 @@ public class Gala.GestureTracker : Object {
     }
 
     /**
-     * Connects a callback that will only be called if != 0 completions were made.
+     * Connects a callback that will be called as soon as the gesture finishes.
      * If with_gesture is false it will be called immediately, otherwise once {@link on_end} is emitted.
      */
-    public void add_success_callback (bool with_gesture, owned OnEnd callback) {
+    public void add_end_callback (bool with_gesture, owned OnEnd callback) {
         if (!with_gesture) {
             callback (1, 1, min_animation_duration);
         } else {
-            ulong handler_id = on_end.connect ((percentage, completions, duration) => {
-                if (completions != 0) {
-                    callback (percentage, completions, duration);
-                }
-            });
+            ulong handler_id = on_end.connect ((percentage, cancel_action, duration) =>
+                callback (percentage, cancel_action, duration)
+            );
             handlers.add (handler_id);
         }
     }

src/InternalUtils.vala

@@ -388,15 +388,5 @@ namespace Gala {
             Clutter.get_default_backend ().get_default_seat ().bell_notify ();
 #endif
         }
-
-        public static void update_transients_visible (Meta.Window window, bool visible) {
-            window.foreach_transient ((transient) => {
-                unowned var actor = (Meta.WindowActor) transient.get_compositor_private ();
-
-                actor.visible = visible;
-
-                return true;
-            });
-        }
     }
 }

src/ShellClients/HideTracker.vala

@@ -227,6 +227,10 @@ public class Gala.HideTracker : Object {
     }
 
     private void trigger_hide () {
+        if (hide_timeout_id != 0) {
+            return;
+        }
+
         // Don't hide if we have transients, e.g. an open popover, dialog, etc.
         var has_transients = false;
         panel.window.foreach_transient (() => {

src/ShellClients/PanelWindow.vala

@@ -5,22 +5,44 @@
  * Authored by: Leonhard Kargl <leo.kargl@proton.me>
  */
 
-public class Gala.PanelWindow : Object {
+public class Gala.PanelWindow : ShellWindow {
+    private const int ANIMATION_DURATION = 250;
+
     private static HashTable<Meta.Window, Meta.Strut?> window_struts = new HashTable<Meta.Window, Meta.Strut?> (null, null);
 
     public WindowManager wm { get; construct; }
-    public Meta.Window window { get; construct; }
     public Pantheon.Desktop.Anchor anchor { get; construct set; }
 
-    private WindowPositioner window_positioner;
+    public Pantheon.Desktop.HideMode hide_mode {
+        get {
+            return hide_tracker == null ? Pantheon.Desktop.HideMode.NEVER : hide_tracker.hide_mode;
+        }
+        set {
+            if (value == NEVER) {
+                hide_tracker = null;
+                show ();
+                make_exclusive ();
+                return;
+            } else if (hide_tracker == null) {
+                unmake_exclusive ();
+
+                hide_tracker = new HideTracker (wm.get_display (), this);
+                hide_tracker.hide.connect (hide);
+                hide_tracker.show.connect (show);
+            }
 
-    private PanelClone clone;
+            hide_tracker.hide_mode = value;
+        }
+    }
+
+    private GestureTracker default_gesture_tracker;
+    private HideTracker? hide_tracker;
 
     private int width = -1;
     private int height = -1;
 
     public PanelWindow (WindowManager wm, Meta.Window window, Pantheon.Desktop.Anchor anchor) {
-        Object (wm: wm, window: window, anchor: anchor);
+        Object (wm: wm, anchor: anchor, window: window, position: Position.from_anchor (anchor));
     }
 
     construct {
@@ -30,22 +52,26 @@ public class Gala.PanelWindow : Object {
             }
         });
 
-        window.stick ();
-
-        clone = new PanelClone (wm, this);
-
-        unowned var display = wm.get_display ();
-
-        window_positioner = new WindowPositioner (display, window, WindowPositioner.Position.from_anchor (anchor));
+        notify["anchor"].connect (() => position = Position.from_anchor (anchor));
 
-        notify["anchor"].connect (() => window_positioner.position = WindowPositioner.Position.from_anchor (anchor));
-
-        unowned var workspace_manager = display.get_workspace_manager ();
+        unowned var workspace_manager = window.display.get_workspace_manager ();
         workspace_manager.workspace_added.connect (update_strut);
         workspace_manager.workspace_removed.connect (update_strut);
 
         window.size_changed.connect (update_strut);
         window.position_changed.connect (update_strut);
+
+        default_gesture_tracker = new GestureTracker (ANIMATION_DURATION, ANIMATION_DURATION);
+
+        window.display.in_fullscreen_changed.connect (() => {
+            if (wm.get_display ().get_monitor_in_fullscreen (window.get_monitor ())) {
+                hide ();
+            } else if (hide_mode == NEVER) {
+                show ();
+            } else {
+                hide_tracker.update_overlap ();
+            }
+        });
     }
 
 #if HAS_MUTTER45
@@ -78,22 +104,24 @@ public class Gala.PanelWindow : Object {
         update_strut ();
     }
 
-    public void set_hide_mode (Pantheon.Desktop.HideMode hide_mode) {
-        clone.hide_mode = hide_mode;
+    private void hide () {
+        add_state (CUSTOM_HIDDEN, default_gesture_tracker, false);
+    }
 
-        if (hide_mode == NEVER) {
-            make_exclusive ();
-        } else {
-            unmake_exclusive ();
+    private void show () {
+        if (window.display.get_monitor_in_fullscreen (window.get_monitor ())) {
+            return;
         }
+
+        remove_state (CUSTOM_HIDDEN, default_gesture_tracker, false);
     }
 
     private void make_exclusive () {
         update_strut ();
     }
 
     private void update_strut () {
-        if (clone.hide_mode != NEVER) {
+        if (hide_mode != NEVER) {
             return;
         }
 

src/ShellClients/WindowPositioner.vala → src/ShellClients/PositionedWindow.vala

@@ -5,7 +5,7 @@
  * Authored by: Leonhard Kargl <leo.kargl@proton.me>
  */
 
-public class Gala.WindowPositioner : Object {
+public class Gala.PositionedWindow : Object {
     public enum Position {
         TOP,
         BOTTOM,
@@ -21,7 +21,6 @@ public class Gala.WindowPositioner : Object {
         }
     }
 
-    public Meta.Display display { get; construct; }
     public Meta.Window window { get; construct; }
     /**
      * This may only be set after the window was shown.
@@ -30,8 +29,8 @@ public class Gala.WindowPositioner : Object {
     public Position position { get; construct set; }
     public Variant? position_data { get; construct set; }
 
-    public WindowPositioner (Meta.Display display, Meta.Window window, Position position, Variant? position_data = null) {
-        Object (display: display, window: window, position: position, position_data: position_data);
+    public PositionedWindow (Meta.Window window, Position position, Variant? position_data = null) {
+        Object (window: window, position: position, position_data: position_data);
     }
 
     construct {
@@ -41,7 +40,7 @@ public class Gala.WindowPositioner : Object {
         window.position_changed.connect (position_window);
         window.shown.connect (position_window);
 
-        unowned var monitor_manager = display.get_context ().get_backend ().get_monitor_manager ();
+        unowned var monitor_manager = window.display.get_context ().get_backend ().get_monitor_manager ();
         monitor_manager.monitors_changed.connect (position_window);
         monitor_manager.monitors_changed_internal.connect (position_window);
 
@@ -51,8 +50,8 @@ public class Gala.WindowPositioner : Object {
 
     private void position_window () {
         int x = 0, y = 0;
-
         var window_rect = window.get_frame_rect ();
+        unowned var display = window.display;
 
         switch (position) {
             case CENTER: