Keep workspace presentation in numeric order

compositor/src/input.rs

@@ -602,20 +602,11 @@ impl Ferese {
         let Some(current) = self.output_workspaces.active_workspace(output) else {
             return;
         };
-        let mut candidates = self
-            .workspaces
-            .iter()
-            .filter(|workspace| {
+        let mut candidates = self.workspaces.ordered();
+        candidates.retain(|workspace| {
             self.output_workspaces
                 .output_for_workspace(workspace.id)
                 .is_none_or(|owner| owner == output)
-            })
-            .collect::<Vec<_>>();
-        candidates.sort_by_key(|workspace| {
-            (
-                workspace.name.parse::<u32>().unwrap_or(u32::MAX),
-                workspace.id.0,
-            )
         });
         let Some(index) = candidates
             .iter()

compositor/src/ipc.rs

@@ -507,9 +507,10 @@ impl Ferese {
 
     fn workspaces_json(&self) -> Value {
         let active = self.workspaces.active_id();
-        let mut workspaces = self
+        let workspaces = self
             .workspaces
-            .iter()
+            .ordered()
+            .into_iter()
             .map(|workspace| {
                 let mode = match workspace.layout.mode() {
                     LayoutMode::Scrolling => "scrolling",
@@ -525,7 +526,6 @@ impl Ferese {
                 })
             })
             .collect::<Vec<_>>();
-        workspaces.sort_by_key(|workspace| workspace["id"].as_u64());
         Value::Array(workspaces)
     }
 

compositor/src/overview.rs

@@ -650,8 +650,7 @@ impl Ferese {
         let selected = self.output_workspaces.active_workspace(output_id);
         let strip = workspace_strip(bounds);
         let capacity = strip_capacity(strip);
-        let mut workspaces = self.workspaces.iter().collect::<Vec<_>>();
-        workspaces.sort_by_key(|workspace| workspace.name.parse::<u64>().unwrap_or(workspace.id.0));
+        let workspaces = self.workspaces.ordered();
         let selected_index = workspaces
             .iter()
             .position(|workspace| Some(workspace.id) == selected)
@@ -770,8 +769,7 @@ impl Ferese {
         };
         let capacity = strip_capacity(workspace_strip(bounds));
         let cards = self.overview_workspace_cards(&output);
-        let mut ordered = self.workspaces.iter().collect::<Vec<_>>();
-        ordered.sort_by_key(|workspace| workspace.name.parse::<u64>().unwrap_or(workspace.id.0));
+        let ordered = self.workspaces.ordered();
         let current = cards
             .first()
             .and_then(|card| {

compositor/src/shell_control.rs

@@ -215,9 +215,9 @@ impl Ferese {
     }
 
     fn workspace_snapshots(&self) -> Vec<WorkspaceSnapshot> {
-        let mut workspaces = self
-            .workspaces
-            .iter()
+        self.workspaces
+            .ordered()
+            .into_iter()
             .map(|workspace| {
                 let output = self.output_workspaces.output_for_workspace(workspace.id);
                 let active = output.is_some_and(|output| {
@@ -231,10 +231,7 @@ impl Ferese {
                     active,
                 }
             })
-            .collect::<Vec<_>>();
-
-        workspaces.sort_by_key(|workspace| workspace.id.0);
-        workspaces
+            .collect()
     }
 
     fn managed_window_snapshots(&self) -> Vec<ManagedWindowSnapshot> {

crates/ferese-core/src/lib.rs

@@ -6,5 +6,5 @@ mod workspace;
 pub use output::{OutputError, OutputGeometry, OutputId, OutputWorkspaceMap, WorkspaceSwitch};
 pub use workspace::{
     LayoutMode, WindowPlacement, Workspace, WorkspaceError, WorkspaceId, WorkspaceLayout,
-    WorkspaceSet,
+    WorkspaceSet, workspace_order_key,
 };

crates/ferese-core/src/workspace.rs

@@ -10,6 +10,10 @@ use ferese_layout::{
 #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
 pub struct WorkspaceId(pub u64);
 
+pub fn workspace_order_key(name: &str, id: WorkspaceId) -> (u64, u64) {
+    (name.parse::<u64>().unwrap_or(u64::MAX), id.0)
+}
+
 #[derive(Debug)]
 pub struct Workspace {
     pub id: WorkspaceId,
@@ -537,6 +541,13 @@ impl WorkspaceSet {
         self.workspaces.values()
     }
 
+    pub fn ordered(&self) -> Vec<&Workspace> {
+        let mut workspaces = self.iter().collect::<Vec<_>>();
+        workspaces
+            .sort_unstable_by_key(|workspace| workspace_order_key(&workspace.name, workspace.id));
+        workspaces
+    }
+
     pub fn prune_empty(&mut self, protected: &HashSet<WorkspaceId>) -> Vec<WorkspaceId> {
         let mut empty = self
             .workspaces
@@ -1134,6 +1145,33 @@ fn finite_or_zero(value: f64) -> f64 {
 
 #[cfg(test)]
 mod tests {
+    #[test]
+    fn numeric_order_survives_pruning_and_recreation() {
+        let mut set = super::WorkspaceSet::default();
+        let original_first = set.active_id();
+        let second = set.ensure_numeric(2).unwrap();
+        set.activate(second).unwrap();
+        assert_eq!(
+            set.prune_empty(&std::collections::HashSet::new()),
+            vec![original_first]
+        );
+
+        let tenth = set.ensure_numeric(10).unwrap();
+        let first = set.ensure_numeric(1).unwrap();
+        assert_ne!(first, original_first);
+        assert!(first.0 > tenth.0);
+        assert_eq!(
+            set.ordered()
+                .into_iter()
+                .map(|workspace| (workspace.name.as_str(), workspace.id))
+                .collect::<Vec<_>>(),
+            vec![("1", first), ("2", second), ("10", tenth)]
+        );
+        set.activate(first).unwrap();
+        assert_eq!(set.active().name, "1");
+        assert!(set.validate().is_ok());
+    }
+
     #[test]
     fn pruning_keeps_windows_and_one_empty_workspace() {
         let mut set = super::WorkspaceSet::default();

shell/ferese-shell/src/control.rs

@@ -272,6 +272,12 @@ impl Dispatch<FereseShellV1, ()> for ControlState {
             ferese_shell_v1::Event::SnapshotEnd { serial }
                 if state.serial.take() == Some(serial) =>
             {
+                state.pending.workspaces.sort_unstable_by_key(|workspace| {
+                    ferese_core::workspace_order_key(
+                        &workspace.name,
+                        ferese_core::WorkspaceId(workspace.id),
+                    )
+                });
                 let _ = state
                     .sender
                     .send(ControlUpdate::Snapshot(state.pending.clone()));