aboutsummaryrefslogtreecommitdiff
path: root/backend/x11/input_device.c
blob: d1f5c2c1f18d4991ce7f9cc7b78212a01a0e3c1a (plain)
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
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
#include <stdlib.h>

#include <wlr/config.h>

#include <linux/input-event-codes.h>

#include <wayland-server-protocol.h>

#include <xcb/xcb.h>
#include <xcb/xfixes.h>
#include <xcb/xinput.h>

#include <wlr/interfaces/wlr_keyboard.h>
#include <wlr/interfaces/wlr_pointer.h>
#include <wlr/interfaces/wlr_touch.h>
#include <wlr/util/log.h>

#include "backend/x11.h"
#include "util/signal.h"

static void send_key_event(struct wlr_x11_backend *x11, uint32_t key,
		enum wl_keyboard_key_state st, xcb_timestamp_t time) {
	struct wlr_keyboard_key_event ev = {
		.time_msec = time,
		.keycode = key,
		.state = st,
		.update_state = true,
	};
	wlr_keyboard_notify_key(&x11->keyboard, &ev);
}

static void send_button_event(struct wlr_x11_output *output, uint32_t key,
		enum wlr_button_state st, xcb_timestamp_t time) {
	struct wlr_pointer_button_event ev = {
		.pointer = &output->pointer,
		.time_msec = time,
		.button = key,
		.state = st,
	};
	wlr_signal_emit_safe(&output->pointer.events.button, &ev);
	wlr_signal_emit_safe(&output->pointer.events.frame, &output->pointer);
}

static void send_axis_event(struct wlr_x11_output *output, int32_t delta,
		xcb_timestamp_t time) {
	struct wlr_pointer_axis_event ev = {
		.pointer = &output->pointer,
		.time_msec = time,
		.source = WLR_AXIS_SOURCE_WHEEL,
		.orientation = WLR_AXIS_ORIENTATION_VERTICAL,
		// 15 is a typical value libinput sends for one scroll
		.delta = delta * 15,
		.delta_discrete = delta,
	};
	wlr_signal_emit_safe(&output->pointer.events.axis, &ev);
	wlr_signal_emit_safe(&output->pointer.events.frame, &output->pointer);
}

static void send_pointer_position_event(struct wlr_x11_output *output,
		int16_t x, int16_t y, xcb_timestamp_t time) {
	struct wlr_pointer_motion_absolute_event ev = {
		.pointer = &output->pointer,
		.time_msec = time,
		.x = (double)x / output->wlr_output.width,
		.y = (double)y / output->wlr_output.height,
	};
	wlr_signal_emit_safe(&output->pointer.events.motion_absolute, &ev);
	wlr_signal_emit_safe(&output->pointer.events.frame, &output->pointer);
}

static void send_touch_down_event(struct wlr_x11_output *output,
		int16_t x, int16_t y, int32_t touch_id, xcb_timestamp_t time) {
	struct wlr_touch_down_event ev = {
		.touch = &output->touch,
		.time_msec = time,
		.x = (double)x / output->wlr_output.width,
		.y = (double)y / output->wlr_output.height,
		.touch_id = touch_id,
	};
	wlr_signal_emit_safe(&output->touch.events.down, &ev);
	wlr_signal_emit_safe(&output->touch.events.frame, NULL);
}

static void send_touch_motion_event(struct wlr_x11_output *output,
		int16_t x, int16_t y, int32_t touch_id, xcb_timestamp_t time) {
	struct wlr_touch_motion_event ev = {
		.touch = &output->touch,
		.time_msec = time,
		.x = (double)x / output->wlr_output.width,
		.y = (double)y / output->wlr_output.height,
		.touch_id = touch_id,
	};
	wlr_signal_emit_safe(&output->touch.events.motion, &ev);
	wlr_signal_emit_safe(&output->touch.events.frame, NULL);
}

static void send_touch_up_event(struct wlr_x11_output *output,
		int32_t touch_id, xcb_timestamp_t time) {
	struct wlr_touch_up_event ev = {
		.touch = &output->touch,
		.time_msec = time,
		.touch_id = touch_id,
	};
	wlr_signal_emit_safe(&output->touch.events.up, &ev);
	wlr_signal_emit_safe(&output->touch.events.frame, NULL);
}

static struct wlr_x11_touchpoint *get_touchpoint_from_x11_touch_id(
		struct wlr_x11_output *output, uint32_t id) {
	struct wlr_x11_touchpoint *touchpoint;
	wl_list_for_each(touchpoint, &output->touchpoints, link) {
		if (touchpoint->x11_id == id) {
			return touchpoint;
		}
	}
	return NULL;
}

void handle_x11_xinput_event(struct wlr_x11_backend *x11,
		xcb_ge_generic_event_t *event) {
	struct wlr_x11_output *output;

	switch (event->event_type) {
	case XCB_INPUT_KEY_PRESS: {
		xcb_input_key_press_event_t *ev =
			(xcb_input_key_press_event_t *)event;

		if (ev->flags & XCB_INPUT_KEY_EVENT_FLAGS_KEY_REPEAT) {
			return;
		}

		wlr_keyboard_notify_modifiers(&x11->keyboard, ev->mods.base,
			ev->mods.latched, ev->mods.locked, ev->mods.effective);
		send_key_event(x11, ev->detail - 8, WL_KEYBOARD_KEY_STATE_PRESSED, ev->time);
		x11->time = ev->time;
		break;
	}
	case XCB_INPUT_KEY_RELEASE: {
		xcb_input_key_release_event_t *ev =
			(xcb_input_key_release_event_t *)event;

		wlr_keyboard_notify_modifiers(&x11->keyboard, ev->mods.base,
			ev->mods.latched, ev->mods.locked, ev->mods.effective);
		send_key_event(x11, ev->detail - 8, WL_KEYBOARD_KEY_STATE_RELEASED, ev->time);
		x11->time = ev->time;
		break;
	}
	case XCB_INPUT_BUTTON_PRESS: {
		xcb_input_button_press_event_t *ev =
			(xcb_input_button_press_event_t *)event;

		output = get_x11_output_from_window_id(x11, ev->event);
		if (!output) {
			return;
		}

		switch (ev->detail) {
		case XCB_BUTTON_INDEX_1:
			send_button_event(output, BTN_LEFT, WLR_BUTTON_PRESSED,
				ev->time);
			break;
		case XCB_BUTTON_INDEX_2:
			send_button_event(output, BTN_MIDDLE, WLR_BUTTON_PRESSED,
				ev->time);
			break;
		case XCB_BUTTON_INDEX_3:
			send_button_event(output, BTN_RIGHT, WLR_BUTTON_PRESSED,
				ev->time);
			break;
		case XCB_BUTTON_INDEX_4:
			send_axis_event(output, -1, ev->time);
			break;
		case XCB_BUTTON_INDEX_5:
			send_axis_event(output, 1, ev->time);
			break;
		}

		x11->time = ev->time;
		break;
	}
	case XCB_INPUT_BUTTON_RELEASE: {
		xcb_input_button_release_event_t *ev =
			(xcb_input_button_release_event_t *)event;

		output = get_x11_output_from_window_id(x11, ev->event);
		if (!output) {
			return;
		}

		switch (ev->detail) {
		case XCB_BUTTON_INDEX_1:
			send_button_event(output, BTN_LEFT, WLR_BUTTON_RELEASED,
				ev->time);
			break;
		case XCB_BUTTON_INDEX_2:
			send_button_event(output, BTN_MIDDLE, WLR_BUTTON_RELEASED,
				ev->time);
			break;
		case XCB_BUTTON_INDEX_3:
			send_button_event(output, BTN_RIGHT, WLR_BUTTON_RELEASED,
				ev->time);
			break;
		}

		x11->time = ev->time;
		break;
	}
	case XCB_INPUT_MOTION: {
		xcb_input_motion_event_t *ev = (xcb_input_motion_event_t *)event;

		output = get_x11_output_from_window_id(x11, ev->event);
		if (!output) {
			return;
		}

		send_pointer_position_event(output, ev->event_x >> 16,
			ev->event_y >> 16, ev->time);
		x11->time = ev->time;
		break;
	}
	case XCB_INPUT_TOUCH_BEGIN: {
		xcb_input_touch_begin_event_t *ev = (xcb_input_touch_begin_event_t *)event;

		output = get_x11_output_from_window_id(x11, ev->event);
		if (!output) {
			return;
		}

		int32_t id = 0;
		if (!wl_list_empty(&output->touchpoints)) {
			struct wlr_x11_touchpoint *last_touchpoint = wl_container_of(
				output->touchpoints.next, last_touchpoint, link);
			id = last_touchpoint->wayland_id + 1;
		}

		struct wlr_x11_touchpoint *touchpoint = calloc(1, sizeof(struct wlr_x11_touchpoint));
		touchpoint->x11_id = ev->detail;
		touchpoint->wayland_id = id;
		wl_list_init(&touchpoint->link);
		wl_list_insert(&output->touchpoints, &touchpoint->link);

		send_touch_down_event(output, ev->event_x >> 16,
			ev->event_y >> 16, touchpoint->wayland_id, ev->time);
		x11->time = ev->time;
		break;
	}
	case XCB_INPUT_TOUCH_END: {
		xcb_input_touch_end_event_t *ev = (xcb_input_touch_end_event_t *)event;

		output = get_x11_output_from_window_id(x11, ev->event);
		if (!output) {
			return;
		}

		struct wlr_x11_touchpoint *touchpoint = get_touchpoint_from_x11_touch_id(output, ev->detail);
		if (!touchpoint) {
			return;
		}

		send_touch_up_event(output, touchpoint->wayland_id, ev->time);
		x11->time = ev->time;

		wl_list_remove(&touchpoint->link);
		free(touchpoint);
		break;
	}
	case XCB_INPUT_TOUCH_UPDATE: {
		xcb_input_touch_update_event_t *ev = (xcb_input_touch_update_event_t *)event;

		output = get_x11_output_from_window_id(x11, ev->event);
		if (!output) {
			return;
		}

		struct wlr_x11_touchpoint *touchpoint = get_touchpoint_from_x11_touch_id(output, ev->detail);
		if (!touchpoint) {
			return;
		}

		send_touch_motion_event(output, ev->event_x >> 16,
			ev->event_y >> 16, touchpoint->wayland_id, ev->time);
		x11->time = ev->time;
		break;
	}
	}
}

const struct wlr_keyboard_impl x11_keyboard_impl = {
	.name = "x11-keyboard",
};

const struct wlr_pointer_impl x11_pointer_impl = {
	.name = "x11-pointer",
};

const struct wlr_touch_impl x11_touch_impl = {
	.name = "x11-touch",
};

void update_x11_pointer_position(struct wlr_x11_output *output,
		xcb_timestamp_t time) {
	struct wlr_x11_backend *x11 = output->x11;

	xcb_query_pointer_cookie_t cookie =
		xcb_query_pointer(x11->xcb, output->win);
	xcb_query_pointer_reply_t *reply =
		xcb_query_pointer_reply(x11->xcb, cookie, NULL);
	if (!reply) {
		return;
	}

	send_pointer_position_event(output, reply->win_x, reply->win_y, time);

	free(reply);
}

bool wlr_input_device_is_x11(struct wlr_input_device *wlr_dev) {
	switch (wlr_dev->type) {
	case WLR_INPUT_DEVICE_KEYBOARD:
		return wlr_dev->keyboard->impl == &x11_keyboard_impl;
	case WLR_INPUT_DEVICE_POINTER:
		return wlr_dev->pointer->impl == &x11_pointer_impl;
	case WLR_INPUT_DEVICE_TOUCH:
		return wlr_dev->touch->impl == &x11_touch_impl;
	default:
		return false;
	}
}