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const std = @import("std");
const c = @import("c.zig").c;
// TODO: InputManager and multi-seat support
pub const Seat = struct {
server: *Server,
wlr_seat: *c.wlr_seat,
listen_new_input: c.wl_listener,
// Multiple mice are handled by the same Cursor
cursor: Cursor,
// Mulitple keyboards are handled separately
keyboards: std.ArrayList(Keyboard),
pub fn init(server: *Server, allocator: *std.mem.Allocator) @This() {
var seat = @This(){
.server = server,
// This seems to be the default seat name used by compositors
.wlr_seat = c.wlr_seat_create(server.*.wl_display, "seat0"),
.cursor = undefined,
.keyboards = std.ArrayList(Keyboard).init(allocator),
.listen_new_input = c.wl_listener{
.link = undefined,
.notify = handle_new_input,
},
};
seat.cursor = cursor.Cursor.init(server);
// Set up handler for all new input devices made available. This
// includes keyboards, pointers, touch, etc.
c.wl_signal_add(&server.*.backend.*.events.new_input, &seat.new_input);
}
fn add_keyboard(self: *@This(), device: *c.wlr_input_device) void {
self.keyboards.append(Keyboard.init(self, device));
c.wlr_seat_set_keyboard(self, device);
}
fn add_pointer(self: *@This(), device: *c.struct_wlr_input_device) void {
// We don't do anything special with pointers. All of our pointer handling
// is proxied through wlr_cursor. On another compositor, you might take this
// opportunity to do libinput configuration on the device to set
// acceleration, etc.
c.wlr_cursor_attach_input_device(self.cursor.wlr_cursor, device);
}
fn handle_new_input(listener: [*c]c.wl_listener, data: ?*c_void) callconv(.C) void {
// This event is raised by the backend when a new input device becomes available.
var seat = @fieldParentPtr(Seat, "listen_new_input", listener);
var device = @ptrCast(*c.wlr_input_device, @alignCast(@alignOf(*c.wlr_input_device), data));
switch (device.*.type) {
.WLR_INPUT_DEVICE_KEYBOARD => seat.add_keyboard(device),
.WLR_INPUT_DEVICE_POINTER => seat.add_pointer(device),
else => {},
}
// We need to let the wlr_seat know what our capabilities are, which is
// communiciated to the client. In TinyWL we always have a cursor, even if
// there are no pointer devices, so we always include that capability.
var caps: u32 = @intCast(u32, c.WL_SEAT_CAPABILITY_POINTER);
// if list not empty
if (c.wl_list_empty(&server.*.keyboards) == 0) {
caps |= @intCast(u32, c.WL_SEAT_CAPABILITY_KEYBOARD);
}
c.wlr_seat_set_capabilities(server.*.seat, caps);
}
};
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