const std = @import("std"); const c = @import("c.zig"); const Config = @import("config.zig").Config; const DecorationManager = @import("decoration_manager.zig").DecorationManager; const InputManager = @import("input_manager.zig").InputManager; const Log = @import("log.zig").Log; const Output = @import("output.zig").Output; const Root = @import("root.zig").Root; const View = @import("view.zig").View; const ViewStack = @import("view_stack.zig").ViewStack; pub const Server = struct { const Self = @This(); allocator: *std.mem.Allocator, wl_display: *c.wl_display, wl_event_loop: *c.wl_event_loop, wlr_backend: *c.wlr_backend, noop_backend: *c.wlr_backend, wlr_renderer: *c.wlr_renderer, wlr_xdg_shell: *c.wlr_xdg_shell, wlr_layer_shell: *c.wlr_layer_shell_v1, decoration_manager: DecorationManager, input_manager: InputManager, root: Root, config: Config, listen_new_output: c.wl_listener, listen_new_xdg_surface: c.wl_listener, listen_new_layer_surface: c.wl_listener, pub fn init(self: *Self, allocator: *std.mem.Allocator) !void { self.allocator = allocator; // The Wayland display is managed by libwayland. It handles accepting // clients from the Unix socket, managing Wayland globals, and so on. self.wl_display = c.wl_display_create() orelse return error.CantCreateWlDisplay; errdefer c.wl_display_destroy(self.wl_display); // Should never return null if the display was created successfully self.wl_event_loop = c.wl_display_get_event_loop(self.wl_display) orelse return error.CantGetEventLoop; // The wlr_backend abstracts the input/output hardware. Autocreate chooses // the best option based on the environment, for example DRM when run from // a tty or wayland if WAYLAND_DISPLAY is set. This frees itself when the // wl_display is destroyed. self.wlr_backend = c.river_wlr_backend_autocreate(self.wl_display) orelse return error.CantCreateWlrBackend; // This backend is used to create a noop output for use when no actual // outputs are available. This frees itself when the wl_display is destroyed. self.noop_backend = c.river_wlr_noop_backend_create(self.wl_display) orelse return error.CantCreateNoopBackend; // If we don't provide a renderer, autocreate makes a GLES2 renderer for us. // The renderer is responsible for defining the various pixel formats it // supports for shared memory, this configures that for clients. self.wlr_renderer = c.river_wlr_backend_get_renderer(self.wlr_backend) orelse return error.CantGetWlrRenderer; // TODO: Handle failure after https://github.com/swaywm/wlroots/pull/2080 c.wlr_renderer_init_wl_display(self.wlr_renderer, self.wl_display); // orelse // return error.CantInitWlDisplay; self.wlr_xdg_shell = c.wlr_xdg_shell_create(self.wl_display) orelse return error.CantCreateWlrXdgShell; self.wlr_layer_shell = c.wlr_layer_shell_v1_create(self.wl_display) orelse return error.CantCreateWlrLayerShell; try self.decoration_manager.init(self); try self.root.init(self); // Must be called after root is initialized try self.input_manager.init(self); try self.config.init(self.allocator); // These all free themselves when the wl_display is destroyed _ = c.wlr_compositor_create(self.wl_display, self.wlr_renderer) orelse return error.CantCreateWlrCompositor; _ = c.wlr_data_device_manager_create(self.wl_display) orelse return error.CantCreateWlrDataDeviceManager; _ = c.wlr_xdg_output_manager_v1_create(self.wl_display, self.root.wlr_output_layout) orelse return error.CantCreateWlrOutputManager; // Register listeners for events on our globals self.listen_new_output.notify = handleNewOutput; c.wl_signal_add(&self.wlr_backend.events.new_output, &self.listen_new_output); self.listen_new_xdg_surface.notify = handleNewXdgSurface; c.wl_signal_add(&self.wlr_xdg_shell.events.new_surface, &self.listen_new_xdg_surface); self.listen_new_layer_surface.notify = handleNewLayerSurface; c.wl_signal_add(&self.wlr_layer_shell.events.new_surface, &self.listen_new_layer_surface); } /// Free allocated memory and clean up pub fn destroy(self: Self) void { c.wl_display_destroy_clients(self.wl_display); c.wl_display_destroy(self.wl_display); self.root.destroy(); } /// Create the socket, set WAYLAND_DISPLAY, and start the backend pub fn start(self: Self) !void { // Add a Unix socket to the Wayland display. const socket = c.wl_display_add_socket_auto(self.wl_display) orelse return error.CantAddSocket; // Start the backend. This will enumerate outputs and inputs, become the DRM // master, etc if (!c.river_wlr_backend_start(self.wlr_backend)) { return error.CantStartBackend; } // Set the WAYLAND_DISPLAY environment variable to our socket if (c.setenv("WAYLAND_DISPLAY", socket, 1) == -1) { return error.CantSetEnv; } } /// Enter the wayland event loop and block until the compositor is exited pub fn run(self: Self) void { c.wl_display_run(self.wl_display); } fn handleNewOutput(listener: ?*c.wl_listener, data: ?*c_void) callconv(.C) void { const server = @fieldParentPtr(Server, "listen_new_output", listener.?); const wlr_output = @ptrCast(*c.wlr_output, @alignCast(@alignOf(*c.wlr_output), data)); server.root.addOutput(wlr_output); } fn handleNewXdgSurface(listener: ?*c.wl_listener, data: ?*c_void) callconv(.C) void { // This event is raised when wlr_xdg_shell receives a new xdg surface from a // client, either a toplevel (application window) or popup. const server = @fieldParentPtr(Server, "listen_new_xdg_surface", listener.?); const wlr_xdg_surface = @ptrCast(*c.wlr_xdg_surface, @alignCast(@alignOf(*c.wlr_xdg_surface), data)); if (wlr_xdg_surface.role != c.enum_wlr_xdg_surface_role.WLR_XDG_SURFACE_ROLE_TOPLEVEL) { // TODO: log return; } server.root.focusedOutput().addView(wlr_xdg_surface); } /// This event is raised when the layer_shell recieves a new surface from a client. fn handleNewLayerSurface(listener: ?*c.wl_listener, data: ?*c_void) callconv(.C) void { const server = @fieldParentPtr(Server, "listen_new_layer_surface", listener.?); const wlr_layer_surface = @ptrCast( *c.wlr_layer_surface_v1, @alignCast(@alignOf(*c.wlr_layer_surface_v1), data), ); Log.Debug.log( "New layer surface: namespace {}, layer {}, anchor {}, size {}x{}, margin ({},{},{},{}), exclusive_zone {}", .{ wlr_layer_surface.namespace, wlr_layer_surface.client_pending.layer, wlr_layer_surface.client_pending.anchor, wlr_layer_surface.client_pending.desired_width, wlr_layer_surface.client_pending.desired_height, wlr_layer_surface.client_pending.margin.top, wlr_layer_surface.client_pending.margin.right, wlr_layer_surface.client_pending.margin.bottom, wlr_layer_surface.client_pending.margin.left, wlr_layer_surface.client_pending.exclusive_zone, }, ); // TODO: this is insufficent for multi output support if (server.root.outputs.first) |node| { const output = &node.data; if (wlr_layer_surface.output == null) { wlr_layer_surface.output = output.wlr_output; } output.addLayerSurface(wlr_layer_surface) catch unreachable; } else { Log.Error.log( "No output available for layer surface '{}' autoassign", .{wlr_layer_surface.namespace}, ); c.wlr_layer_surface_v1_close(wlr_layer_surface); } } };