feat: fullscreen focus swapping (#1515)

zellij-server/src/panes/tiled_panes/mod.rs

@@ -1082,6 +1082,19 @@ impl TiledPanes {
             }
         }
     }
+
+    pub fn switch_next_pane_fullscreen(&mut self, client_id: ClientId) {
+        self.unset_fullscreen();
+        self.focus_next_pane(client_id);
+        self.toggle_active_pane_fullscreen(client_id);
+    }
+
+    pub fn switch_prev_pane_fullscreen(&mut self, client_id: ClientId) {
+        self.unset_fullscreen();
+        self.focus_previous_pane(client_id);
+        self.toggle_active_pane_fullscreen(client_id);
+    }
+
     pub fn panes_to_hide_count(&self) -> usize {
         self.panes_to_hide.len()
     }

zellij-server/src/tab/mod.rs

@@ -989,6 +989,18 @@ impl Tab {
     pub fn are_floating_panes_visible(&self) -> bool {
         self.floating_panes.panes_are_visible()
     }
+    pub fn switch_next_pane_fullscreen(&mut self, client_id: ClientId) {
+        if !self.is_fullscreen_active() {
+            return;
+        }
+        self.tiled_panes.switch_next_pane_fullscreen(client_id);
+    }
+    pub fn switch_prev_pane_fullscreen(&mut self, client_id: ClientId) {
+        if !self.is_fullscreen_active() {
+            return;
+        }
+        self.tiled_panes.switch_next_pane_fullscreen(client_id);
+    }
     pub fn set_force_render(&mut self) {
         self.tiled_panes.set_force_render();
         self.floating_panes.set_force_render();
@@ -1221,6 +1233,7 @@ impl Tab {
             return;
         }
         if self.tiled_panes.fullscreen_is_active() {
+            self.switch_next_pane_fullscreen(client_id);
             return;
         }
         self.tiled_panes.focus_next_pane(client_id);
@@ -1230,6 +1243,7 @@ impl Tab {
             return;
         }
         if self.tiled_panes.fullscreen_is_active() {
+            self.switch_prev_pane_fullscreen(client_id);
             return;
         }
         self.tiled_panes.focus_previous_pane(client_id);
@@ -1246,7 +1260,8 @@ impl Tab {
                 return false;
             }
             if self.tiled_panes.fullscreen_is_active() {
-                return false;
+                self.switch_next_pane_fullscreen(client_id);
+                return true;
             }
             self.tiled_panes.move_focus_left(client_id)
         }
@@ -1295,7 +1310,8 @@ impl Tab {
                 return false;
             }
             if self.tiled_panes.fullscreen_is_active() {
-                return false;
+                self.switch_next_pane_fullscreen(client_id);
+                return true;
             }
             self.tiled_panes.move_focus_right(client_id)
         }

zellij-server/src/tab/unit/tab_tests.rs

@@ -670,45 +670,64 @@ pub fn toggle_focused_pane_fullscreen() {
 }
 
 #[test]
-pub fn move_focus_is_disabled_in_fullscreen() {
+fn switch_to_next_pane_fullscreen() {
     let size = Size {
         cols: 121,
         rows: 20,
     };
-    let mut tab = create_new_tab(size);
+
-    for i in 2..5 {
+    let mut active_tab = create_new_tab(size);
-        let new_pane_id = PaneId::Terminal(i);
+
-        tab.new_pane(new_pane_id, Some(1));
+    active_tab.new_pane(PaneId::Terminal(1), Some(1));
-    }
+    active_tab.new_pane(PaneId::Terminal(2), Some(1));
-    tab.toggle_active_pane_fullscreen(1);
+    active_tab.new_pane(PaneId::Terminal(3), Some(1));
-    tab.move_focus_left(1);
+    active_tab.new_pane(PaneId::Terminal(4), Some(1));
+    active_tab.toggle_active_pane_fullscreen(1);
+
+    // order is now 1 ->2 -> 3 -> 4 due to how new panes are inserted
+
+    active_tab.switch_next_pane_fullscreen(1);
+    active_tab.switch_next_pane_fullscreen(1);
+    active_tab.switch_next_pane_fullscreen(1);
+    active_tab.switch_next_pane_fullscreen(1);
+
+    // position should now be back in terminal 4.
+
     assert_eq!(
-        tab.tiled_panes.panes.get(&PaneId::Terminal(4)).unwrap().x(),
+        active_tab.get_active_pane_id(1).unwrap(),
-        0,
+        PaneId::Terminal(4),
-        "Pane x is on screen edge"
+        "Active pane did not switch in fullscreen mode"
     );
+}
+
+#[test]
+fn switch_to_prev_pane_fullscreen() {
+    let size = Size {
+        cols: 121,
+        rows: 20,
+    };
+    let mut active_tab = create_new_tab(size);
+
+    //testing four consecutive switches in fullscreen mode
+
+    active_tab.new_pane(PaneId::Terminal(1), Some(1));
+    active_tab.new_pane(PaneId::Terminal(2), Some(1));
+    active_tab.new_pane(PaneId::Terminal(3), Some(1));
+    active_tab.new_pane(PaneId::Terminal(4), Some(1));
+    active_tab.toggle_active_pane_fullscreen(1);
+    // order is now 1 2 3 4
+
+    active_tab.switch_prev_pane_fullscreen(1);
+    active_tab.switch_prev_pane_fullscreen(1);
+    active_tab.switch_prev_pane_fullscreen(1);
+    active_tab.switch_prev_pane_fullscreen(1);
+
+    // the position should now be in Terminal 4.
+
     assert_eq!(
-        tab.tiled_panes.panes.get(&PaneId::Terminal(4)).unwrap().y(),
+        active_tab.get_active_pane_id(1).unwrap(),
-        0,
+        PaneId::Terminal(4),
-        "Pane y is on screen edge"
+        "Active pane did not switch in fullscreen mode"
-    );
-    assert_eq!(
-        tab.tiled_panes
-            .panes
-            .get(&PaneId::Terminal(4))
-            .unwrap()
-            .cols(),
-        121,
-        "Pane cols match fullscreen cols"
-    );
-    assert_eq!(
-        tab.tiled_panes
-            .panes
-            .get(&PaneId::Terminal(4))
-            .unwrap()
-            .rows(),
-        20,
-        "Pane rows match fullscreen rows"
     );
 }