some basic xdg surface stuff

src/output.zig

@@ -3,13 +3,13 @@ const Output = @This();
 const std = @import("std");
 const posix = std.posix;
 const gpa = std.heap.c_allocator;
+const server = &@import("main.zig").server;
 
 const wl = @import("wayland").server.wl;
 const wlr = @import("wlroots");
 
 const Server = @import("server.zig");
 
-server: *Server,
 wlr_output: *wlr.Output,
 
 frame: wl.Listener(*wlr.Output) = .init(handleFrame),
@@ -17,11 +17,10 @@ request_state: wl.Listener(*wlr.Output.event.RequestState) = .init(handleRequest
 destroy: wl.Listener(*wlr.Output) = .init(handleDestroy),
 
 // The wlr.Output should be destroyed by the caller on failure to trigger cleanup.
-pub fn create(server: *Server, wlr_output: *wlr.Output) !*Output {
+pub fn create(wlr_output: *wlr.Output) !*Output {
   const output = try gpa.create(Output);
 
   output.* = .{
-    .server = server,
     .wlr_output = wlr_output,
   };
   wlr_output.events.frame.add(&output.frame);
@@ -42,6 +41,7 @@ pub fn handleRequestState(
 listener: *wl.Listener(*wlr.Output.event.RequestState),
 event: *wlr.Output.event.RequestState,
   ) void {
+  std.log.debug("Handling request state", .{});
   const output: *Output = @fieldParentPtr("request_state", listener);
 
   if (!output.wlr_output.commitState(event.state)) {
@@ -49,13 +49,13 @@ event: *wlr.Output.event.RequestState,
   }
 }
 
-pub fn handleFrame(listener: *wl.Listener(*wlr.Output), wlr_output: *wlr.Output) void {
-  const output: *Output = @fieldParentPtr("destroy", listener);
+pub fn handleFrame(_: *wl.Listener(*wlr.Output), wlr_output: *wlr.Output) void {
+  std.log.debug("Handling frame for {s}", .{wlr_output.name});
 
-  const scene_output = output.*.server.*.scene.*.getSceneOutput(wlr_output);
+  const scene_output = server.scene.*.getSceneOutput(wlr_output);
 
   if(scene_output) |so| {
-    std.log.info("Rendering commitin scene output\n", .{});
+    std.log.info("Rendering commited scene output\n", .{});
     _ = so.commit(null);
 
     var now = posix.clock_gettime(posix.CLOCK.MONOTONIC) catch @panic("CLOCK_MONOTONIC not supported");
@@ -65,6 +65,7 @@ pub fn handleFrame(listener: *wl.Listener(*wlr.Output), wlr_output: *wlr.Output)
 }
 
 pub fn handleDestroy(listener: *wl.Listener(*wlr.Output), _: *wlr.Output) void {
+  std.log.debug("Handling destroy", .{});
   const output: *Output = @fieldParentPtr("destroy", listener);
 
   std.log.debug("removing output: {s}", .{output.*.wlr_output.*.name});

src/root.zig

@@ -1,19 +1,23 @@
-const std = @import("std");
+const Root = @This();
 
+const std = @import("std");
 const wl = @import("wayland").server.wl;
 const wlr = @import("wlroots");
 
 const Output = @import("output.zig");
+const TopLevel = @import("toplevel.zig");
 
 const server = &@import("main.zig").server;
+const gpa = std.heap.c_allocator;
 
-pub const Root = struct {
 scene: *wlr.Scene,
 
 output_layout: *wlr.OutputLayout,
 
 new_output: wl.Listener(*wlr.Output),
 
+all_top_levels: std.ArrayList(*TopLevel),
+
 pub fn init(root: *Root) !void {
   std.log.info("Creating root of mezzaluna\n", .{});
 
@@ -28,6 +32,8 @@ pub const Root = struct {
     .output_layout = output_layout,
 
     .new_output = .init(handleNewOutput),
+
+    .all_top_levels = try .initCapacity(gpa, 10),
   };
 
   server.backend.events.new_output.add(&root.new_output);
@@ -38,14 +44,16 @@ pub const Root = struct {
     std.log.err("failed to add new output to output layout\n", .{});
     return;
   };
-
-    // _ = self.scene.createSceneOutput(new_output.wlr_output) catch {
-    //   std.log.err("failed to create scene output for new output", .{});
-    //   return;
-    // };
 }
+
+pub fn addTopLevel(self: *Root, top_level: *TopLevel) void {
+  self.all_top_levels.append(gpa, top_level) catch {
+    std.log.err("Out of memory to append top level", .{});
   };
 
+  // self.scene.tree.children.append(wlr.SceneNode)
+}
+
 fn handleNewOutput(_: *wl.Listener(*wlr.Output), wlr_output: *wlr.Output) void {
   std.log.info("Handling a new output - {s}", .{wlr_output.name});
 
@@ -61,7 +69,7 @@ fn handleNewOutput(_: *wl.Listener(*wlr.Output), wlr_output: *wlr.Output) void {
   }
   if (!wlr_output.commitState(&state)) return;
 
-  const new_output = Output.create(server, wlr_output) catch {
+  const new_output = Output.create(wlr_output) catch {
     std.log.err("failed to allocate new output", .{});
     wlr_output.destroy();
     return;
@@ -69,3 +77,4 @@ fn handleNewOutput(_: *wl.Listener(*wlr.Output), wlr_output: *wlr.Output) void {
 
   server.root.addOutput(new_output);
 }
+

src/server.zig

@@ -8,7 +8,8 @@ const wlr = @import("wlroots");
 
 const Output = @import("output.zig");
 const Keyboard = @import("keyboard.zig");
-const Root = @import("root.zig").Root;
+const TopLevel = @import("toplevel.zig");
+const Root = @import("root.zig");
 
 allocator: *wlr.Allocator,
 backend: *wlr.Backend,
@@ -32,6 +33,9 @@ cursor_mgr: *wlr.XcursorManager,
 
 // Listeners
 new_input: wl.Listener(*wlr.InputDevice) = .init(newInput),
+
+new_xdg_surface: wl.Listener(*wlr.XdgSurface) = .init(handleNewXdgSurface),
+
 cursor_motion: wl.Listener(*wlr.Pointer.event.Motion) = .init(cursorMotion),
 cursor_motion_absolute: wl.Listener(*wlr.Pointer.event.MotionAbsolute) = .init(cursorMotionAbsolute),
 cursor_button: wl.Listener(*wlr.Pointer.event.Button) = .init(cursorButton),
@@ -75,9 +79,13 @@ pub fn init(server: *Server) !void {
   try server.renderer.initServer(wl_server);
   try Root.init(&server.root);
 
+  server.xdg_shell.events.new_surface.add(&server.new_xdg_surface);
+
   server.backend.events.new_input.add(&server.new_input);
+
   server.seat.events.request_set_cursor.add(&server.request_set_cursor);
   server.seat.events.request_set_selection.add(&server.request_set_selection);
+
   server.keyboards.init();
 
   server.cursor.attachOutputLayout(server.output_layout);
@@ -237,3 +245,16 @@ fn requestSetSelection(
   const server: *Server = @fieldParentPtr("request_set_selection", listener);
   server.seat.setSelection(event.source, event.serial);
 }
+
+fn handleNewXdgSurface(listener: *wl.Listener(*wlr.XdgSurface), xdg_surface: *wlr.XdgSurface) void {
+  const server: *Server = @fieldParentPtr("new_xdg_surface", listener);
+
+  std.log.info("New xdg_toplevel added", .{});
+
+  const top_level = TopLevel.init(xdg_surface) catch {
+    std.log.err("Unable to allocate a top level", .{});
+    return;
+  };
+
+  server.root.addTopLevel(top_level);
+}

src/toplevel.zig

@@ -0,0 +1,35 @@
+const TopLevel = @This();
+
+const std = @import("std");
+const wl = @import("wayland").server.wl;
+const wlr = @import("wlroots");
+
+const gpa = std.heap.c_allocator;
+const server = &@import("main.zig").server;
+
+xdg_toplevel: *wlr.XdgToplevel,
+box: *wlr.Box,
+
+pub fn init(xdg_surface: *wlr.XdgSurface) !*TopLevel {
+  const top_level = gpa.create(TopLevel) catch |err| {
+    std.log.err("Unable to allocate memory for new XdgTopLevel", .{});
+    return err;
+  };
+
+  if(xdg_surface.role_data.toplevel) |xgd_toplevel| {
+    top_level.* = .{
+      .xdg_toplevel = xgd_toplevel,
+      .box = undefined,
+    };
+
+    top_level.box.x = 0;
+    top_level.box.y = 0;
+    top_level.box.width = 640;
+    top_level.box.height = 360;
+  }
+
+  // Listen to important toplevel events
+  // top_level.xdg_toplevel.events.set_title.add(listener: *Listener(void))
+
+  return top_level;
+}