Implement focus-monitor to focus a specific monitor by output.

niri-config/src/lib.rs

@@ -1568,6 +1568,7 @@ pub enum Action {
     FocusMonitorUp,
     FocusMonitorPrevious,
     FocusMonitorNext,
+    FocusMonitor(#[knuffel(argument)] String),
     MoveWindowToMonitorLeft,
     MoveWindowToMonitorRight,
     MoveWindowToMonitorDown,
@@ -1770,6 +1771,7 @@ impl From<niri_ipc::Action> for Action {
             niri_ipc::Action::FocusMonitorUp {} => Self::FocusMonitorUp,
             niri_ipc::Action::FocusMonitorPrevious {} => Self::FocusMonitorPrevious,
             niri_ipc::Action::FocusMonitorNext {} => Self::FocusMonitorNext,
+            niri_ipc::Action::FocusMonitor { output } => Self::FocusMonitor(output),
             niri_ipc::Action::MoveWindowToMonitorLeft {} => Self::MoveWindowToMonitorLeft,
             niri_ipc::Action::MoveWindowToMonitorRight {} => Self::MoveWindowToMonitorRight,
             niri_ipc::Action::MoveWindowToMonitorDown {} => Self::MoveWindowToMonitorDown,
@@ -3770,6 +3772,7 @@ mod tests {
                 Mod+T allow-when-locked=true { spawn "alacritty"; }
                 Mod+Q hotkey-overlay-title=null { close-window; }
                 Mod+Shift+H { focus-monitor-left; }
+                Mod+Shift+O { focus-monitor "eDP-1"; }
                 Mod+Ctrl+Shift+L { move-window-to-monitor-right; }
                 Mod+Comma { consume-window-into-column; }
                 Mod+1 { focus-workspace 1; }
@@ -4606,6 +4609,24 @@ mod tests {
                         allow_inhibiting: true,
                         hotkey_overlay_title: None,
                     },
+                    Bind {
+                        key: Key {
+                            trigger: Keysym(
+                                XK_o,
+                            ),
+                            modifiers: Modifiers(
+                                SHIFT | COMPOSITOR,
+                            ),
+                        },
+                        action: FocusMonitor(
+                            "eDP-1",
+                        ),
+                        repeat: true,
+                        cooldown: None,
+                        allow_when_locked: false,
+                        allow_inhibiting: true,
+                        hotkey_overlay_title: None,
+                    },
                     Bind {
                         key: Key {
                             trigger: Keysym(

niri-ipc/src/lib.rs

@@ -457,6 +457,12 @@ pub enum Action {
     FocusMonitorPrevious {},
     /// Focus the next monitor.
     FocusMonitorNext {},
+    /// Focus a monitor by name.
+    FocusMonitor {
+        /// Name of the output to focus.
+        #[cfg_attr(feature = "clap", arg())]
+        output: String,
+    },
     /// Move the focused window to the monitor to the left.
     MoveWindowToMonitorLeft {},
     /// Move the focused window to the monitor to the right.

src/input/mod.rs

@@ -1386,6 +1386,15 @@ impl State {
                     self.niri.layer_shell_on_demand_focus = None;
                 }
             }
+            Action::FocusMonitor(output) => {
+                if let Some(output) = self.niri.output_by_name_match(&output).cloned() {
+                    self.niri.layout.focus_output(&output);
+                    if !self.maybe_warp_cursor_to_focus_centered() {
+                        self.move_cursor_to_output(&output);
+                    }
+                    self.niri.layer_shell_on_demand_focus = None;
+                }
+            }
             Action::MoveWindowToMonitorLeft => {
                 if let Some(output) = self.niri.output_left() {
                     self.niri.layout.move_to_output(None, &output, None);