1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
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 deinit(self: *Self) void {
// Note: order is important here
c.wl_display_destroy_clients(self.wl_display);
c.wl_display_destroy(self.wl_display);
self.input_manager.deinit();
self.root.deinit();
}
/// 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 self = @fieldParentPtr(Self, "listen_new_output", listener.?);
const wlr_output = @ptrCast(*c.wlr_output, @alignCast(@alignOf(*c.wlr_output), data));
Log.Debug.log("New output {}", .{wlr_output.name});
self.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 self = @fieldParentPtr(Self, "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;
}
self.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.
fn handleNewLayerSurface(listener: ?*c.wl_listener, data: ?*c_void) callconv(.C) void {
const self = @fieldParentPtr(Self, "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,
},
);
// If the new layer surface does not have an output assigned to it, use the
// first output or close the surface if none are available.
if (wlr_layer_surface.output == null) {
if (self.root.outputs.first) |node| {
const output = &node.data;
Log.Debug.log(
"New layer surface had null output, assigning it to output {}",
.{output.wlr_output.name},
);
wlr_layer_surface.output = output.wlr_output;
} else {
Log.Error.log(
"No output available for layer surface '{}'",
.{wlr_layer_surface.namespace},
);
c.wlr_layer_surface_v1_close(wlr_layer_surface);
return;
}
}
const output = @ptrCast(*Output, @alignCast(@alignOf(*Output), wlr_layer_surface.output.*.data));
output.addLayerSurface(wlr_layer_surface) catch unreachable;
}
};
|
