Add focus-column (by index) action

niri-config/src/lib.rs

@@ -1486,6 +1486,7 @@ pub enum Action {
     FocusColumnLast,
     FocusColumnRightOrFirst,
     FocusColumnLeftOrLast,
+    FocusColumn(#[knuffel(argument)] usize),
     FocusWindowOrMonitorUp,
     FocusWindowOrMonitorDown,
     FocusColumnOrMonitorLeft,
@@ -1682,6 +1683,7 @@ impl From<niri_ipc::Action> for Action {
             niri_ipc::Action::FocusColumnLast {} => Self::FocusColumnLast,
             niri_ipc::Action::FocusColumnRightOrFirst {} => Self::FocusColumnRightOrFirst,
             niri_ipc::Action::FocusColumnLeftOrLast {} => Self::FocusColumnLeftOrLast,
+            niri_ipc::Action::FocusColumn { index } => Self::FocusColumn(index),
             niri_ipc::Action::FocusWindowOrMonitorUp {} => Self::FocusWindowOrMonitorUp,
             niri_ipc::Action::FocusWindowOrMonitorDown {} => Self::FocusWindowOrMonitorDown,
             niri_ipc::Action::FocusColumnOrMonitorLeft {} => Self::FocusColumnOrMonitorLeft,

niri-ipc/src/lib.rs

@@ -249,6 +249,14 @@ pub enum Action {
     FocusColumnRightOrFirst {},
     /// Focus the next column to the left, looping if at start.
     FocusColumnLeftOrLast {},
+    /// Focus a column by index.
+    FocusColumn {
+        /// Index of the column to focus.
+        ///
+        /// The index starts from 1 for the first column.
+        #[cfg_attr(feature = "clap", arg())]
+        index: usize,
+    },
     /// Focus the window or the monitor above.
     FocusWindowOrMonitorUp {},
     /// Focus the window or the monitor below.

src/input/mod.rs

@@ -882,6 +882,13 @@ impl State {
                 // FIXME: granular
                 self.niri.queue_redraw_all();
             }
+            Action::FocusColumn(index) => {
+                self.niri.layout.focus_column(index);
+                self.maybe_warp_cursor_to_focus();
+                self.niri.layer_shell_on_demand_focus = None;
+                // FIXME: granular
+                self.niri.queue_redraw_all();
+            }
             Action::FocusWindowOrMonitorUp => {
                 if let Some(output) = self.niri.output_up() {
                     if self.niri.layout.focus_window_up_or_output(&output)

src/layout/mod.rs

@@ -1946,6 +1946,13 @@ impl<W: LayoutElement> Layout<W> {
         workspace.focus_column_left_or_last();
     }
 
+    pub fn focus_column(&mut self, index: usize) {
+        let Some(workspace) = self.active_workspace_mut() else {
+            return;
+        };
+        workspace.focus_column(index);
+    }
+
     pub fn focus_window_up_or_output(&mut self, output: &Output) -> bool {
         if let Some(workspace) = self.active_workspace_mut() {
             if workspace.focus_up() {

src/layout/scrolling.rs

@@ -1491,6 +1491,14 @@ impl<W: LayoutElement> ScrollingSpace<W> {
         self.activate_column(self.columns.len() - 1);
     }
 
+    pub fn focus_column(&mut self, index: usize) {
+        if self.columns.is_empty() {
+            return;
+        }
+
+        self.activate_column(index.saturating_sub(1).min(self.columns.len() - 1));
+    }
+
     pub fn focus_window_in_column(&mut self, index: u8) {
         if self.columns.is_empty() {
             return;

src/layout/tests.rs

@@ -374,6 +374,7 @@ enum Op {
     FocusColumnLast,
     FocusColumnRightOrFirst,
     FocusColumnLeftOrLast,
+    FocusColumn(#[proptest(strategy = "1..=5usize")] usize),
     FocusWindowOrMonitorUp(#[proptest(strategy = "1..=2u8")] u8),
     FocusWindowOrMonitorDown(#[proptest(strategy = "1..=2u8")] u8),
     FocusColumnOrMonitorLeft(#[proptest(strategy = "1..=2u8")] u8),
@@ -907,6 +908,7 @@ impl Op {
             Op::FocusColumnLast => layout.focus_column_last(),
             Op::FocusColumnRightOrFirst => layout.focus_column_right_or_first(),
             Op::FocusColumnLeftOrLast => layout.focus_column_left_or_last(),
+            Op::FocusColumn(index) => layout.focus_column(index),
             Op::FocusWindowOrMonitorUp(id) => {
                 let name = format!("output{id}");
                 let Some(output) = layout.outputs().find(|o| o.name() == name).cloned() else {

src/layout/workspace.rs

@@ -850,6 +850,13 @@ impl<W: LayoutElement> Workspace<W> {
         }
     }
 
+    pub fn focus_column(&mut self, index: usize) {
+        if self.floating_is_active.get() {
+            self.focus_tiling();
+        }
+        self.scrolling.focus_column(index);
+    }
+
     pub fn focus_window_in_column(&mut self, index: u8) {
         if self.floating_is_active.get() {
             return;