Track the focused output of seats

src/command.zig

@@ -24,7 +24,7 @@ pub fn exitCompositor(seat: *Seat, arg: Arg) void {
 /// Focus either the next or the previous visible view, depending on the bool
 /// passed.
 fn focusNextPrevView(seat: *Seat, next: bool) void {
-    const output = seat.input_manager.server.root.focusedOutput();
+    const output = seat.focused_output;
     if (seat.focused_view) |current_focus| {
         // If there is a currently focused view, focus the next visible view in the stack.
         const focused_node = @fieldParentPtr(ViewStack(View).Node, "view", current_focus);
@@ -66,27 +66,25 @@ pub fn focusPrevView(seat: *Seat, arg: Arg) void {
 /// Modify the number of master views
 pub fn modifyMasterCount(seat: *Seat, arg: Arg) void {
     const delta = arg.int;
-    const root = &seat.input_manager.server.root;
-    const output = root.focusedOutput();
+    const output = seat.focused_output;
     output.master_count = @intCast(
         u32,
         std.math.max(0, @intCast(i32, output.master_count) + delta),
     );
-    root.arrange();
+    seat.input_manager.server.root.arrange();
 }
 
 /// Modify the percent of the width of the screen that the master views occupy.
 pub fn modifyMasterFactor(seat: *Seat, arg: Arg) void {
     const delta = arg.float;
-    const root = &seat.input_manager.server.root;
-    const output = root.focusedOutput();
+    const output = seat.focused_output;
     const new_master_factor = std.math.min(
         std.math.max(output.master_factor + delta, 0.05),
         0.95,
     );
     if (new_master_factor != output.master_factor) {
         output.master_factor = new_master_factor;
-        root.arrange();
+        seat.input_manager.server.root.arrange();
     }
 }
 
@@ -94,13 +92,12 @@ pub fn modifyMasterFactor(seat: *Seat, arg: Arg) void {
 /// TODO: if the top of the stack is focused, bump the next visible view.
 pub fn zoom(seat: *Seat, arg: Arg) void {
     if (seat.focused_view) |current_focus| {
-        const root = &seat.input_manager.server.root;
-        const output = root.focusedOutput();
+        const output = seat.focused_output;
         const node = @fieldParentPtr(ViewStack(View).Node, "view", current_focus);
         if (node != output.views.first) {
             output.views.remove(node);
             output.views.push(node);
-            root.arrange();
+            seat.input_manager.server.root.arrange();
         }
     }
 }
@@ -108,21 +105,18 @@ pub fn zoom(seat: *Seat, arg: Arg) void {
 /// Switch focus to the passed tags.
 pub fn focusTags(seat: *Seat, arg: Arg) void {
     const tags = arg.uint;
-    const root = &seat.input_manager.server.root;
-    const output = root.focusedOutput();
-    output.pending_focused_tags = tags;
-    root.arrange();
+    seat.focused_output.pending_focused_tags = tags;
+    seat.input_manager.server.root.arrange();
 }
 
 /// Toggle focus of the passsed tags.
 pub fn toggleTags(seat: *Seat, arg: Arg) void {
     const tags = arg.uint;
-    const root = &seat.input_manager.server.root;
-    const output = root.focusedOutput();
+    const output = seat.focused_output;
     const new_focused_tags = output.current_focused_tags ^ tags;
     if (new_focused_tags != 0) {
         output.pending_focused_tags = new_focused_tags;
-        root.arrange();
+        seat.input_manager.server.root.arrange();
     }
 }
 

src/input_manager.zig

@@ -12,6 +12,7 @@ pub const InputManager = struct {
     server: *Server,
 
     seats: std.TailQueue(Seat),
+    default_seat: *Seat,
 
     listen_new_input: c.wl_listener,
 
@@ -22,6 +23,7 @@ pub const InputManager = struct {
 
         const seat_node = try server.allocator.create(std.TailQueue(Seat).Node);
         try seat_node.data.init(self, default_seat_name);
+        self.default_seat = &seat_node.data;
         self.seats.prepend(seat_node);
 
         // Set up handler for all new input devices made available. This

src/root.zig

@@ -19,7 +19,8 @@ pub const Root = struct {
     wlr_output_layout: *c.wlr_output_layout,
     outputs: std.TailQueue(Output),
 
-    /// This output is used when no real outputs are available.
+    /// This output is used internally when no real outputs are available.
+    /// It is not advertised to clients.
     noop_output: Output,
 
     /// Number of pending configures sent in the current transaction.
@@ -58,11 +59,16 @@ pub const Root = struct {
         const node = self.outputs.allocateNode(self.server.allocator) catch unreachable;
         node.data.init(self, wlr_output) catch unreachable;
         self.outputs.append(node);
-    }
 
-    /// TODO: move this to seat, it's just a stop gap hack
-    pub fn focusedOutput(self: Self) *Output {
-        return &self.outputs.first.?.data;
+        // if we previously had no real outputs, move focus from the noop output
+        // to the new one.
+        if (self.outputs.len == 1) {
+            // TODO: move views from the noop output to the new one and focus(null)
+            var it = self.server.input_manager.seats.first;
+            while (it) |seat_node| : (it = seat_node.next) {
+                seat_node.data.focused_output = &self.outputs.first.?.data;
+            }
+        }
     }
 
     /// Finds the topmost view under the output layout coordinates lx, ly

src/seat.zig

@@ -2,9 +2,10 @@ const std = @import("std");
 const c = @import("c.zig");
 
 const Cursor = @import("cursor.zig").Cursor;
-const Log = @import("log.zig").Log;
 const InputManager = @import("input_manager.zig").InputManager;
 const Keyboard = @import("keyboard.zig").Keyboard;
+const Log = @import("log.zig").Log;
+const Output = @import("output.zig").Output;
 const View = @import("view.zig").View;
 const ViewStack = @import("view_stack.zig").ViewStack;
 
@@ -20,6 +21,9 @@ pub const Seat = struct {
     /// Mulitple keyboards are handled separately
     keyboards: std.TailQueue(Keyboard),
 
+    /// Currently focused output, may be the noop output if no
+    focused_output: *Output,
+
     /// Currently focused view if any
     focused_view: ?*View,
 
@@ -39,6 +43,8 @@ pub const Seat = struct {
 
         self.keyboards = std.TailQueue(Keyboard).init();
 
+        self.focused_output = &self.input_manager.server.root.noop_output;
+
         self.focused_view = null;
 
         self.focus_stack.init();
@@ -54,11 +60,15 @@ pub const Seat = struct {
         var view = _view;
 
         // If view is null or not currently visible
-        if (if (view) |v| v.current_tags & v.output.current_focused_tags == 0 else true) {
+        if (if (view) |v|
+            v.output != self.focused_output or
+                v.current_tags & self.focused_output.current_focused_tags == 0
+        else
+            true) {
             // Set view to the first currently visible view in the focus stack if any
             view = if (ViewStack(*View).iterator(
                 self.focus_stack.first,
-                self.input_manager.server.root.focusedOutput().current_focused_tags,
+                self.focused_output.current_focused_tags,
             ).next()) |node| node.view else null;
         }
 

src/server.zig

@@ -145,7 +145,7 @@ pub const Server = struct {
             return;
         }
 
-        server.root.focusedOutput().addView(wlr_xdg_surface);
+        server.input_manager.default_seat.focused_output.addView(wlr_xdg_surface);
     }
 
     /// This event is raised when the layer_shell recieves a new surface from a client.