-
Notifications
You must be signed in to change notification settings - Fork 17
/
xcb.c
459 lines (377 loc) · 15 KB
/
xcb.c
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
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
/*
* vim:ts=4:sw=4:expandtab
*
* © 2010 Michael Stapelberg
*
* xcb.c: contains all functions which use XCB to talk to X11. Mostly wrappers
* around the rather complicated/ugly parts of the XCB API.
*
*/
#include <xcb/composite.h>
#include <xcb/dpms.h>
#include <xcb/xcb.h>
#include <xcb/xcb_image.h>
#include <xcb/xcb_atom.h>
#include <xcb/xcb_aux.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <assert.h>
#include <err.h>
#include <time.h>
#include <sys/time.h>
#include "cursors.h"
#include "unlock_indicator.h"
#include "xcb.h"
extern auth_state_t auth_state;
xcb_connection_t *conn;
xcb_screen_t *screen;
#define curs_invisible_width 8
#define curs_invisible_height 8
static unsigned char curs_invisible_bits[] = {0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00};
#define curs_windows_width 11
#define curs_windows_height 19
static unsigned char curs_windows_bits[] = {
0xfe, 0x07, 0xfc, 0x07, 0xfa, 0x07, 0xf6, 0x07, 0xee, 0x07,
0xde, 0x07, 0xbe, 0x07, 0x7e, 0x07, 0xfe, 0x06, 0xfe, 0x05,
0x3e, 0x00, 0xb6, 0x07, 0x6a, 0x07, 0x6c, 0x07, 0xde, 0x06,
0xdf, 0x06, 0xbf, 0x05, 0xbf, 0x05, 0x7f, 0x06};
#define mask_windows_width 11
#define mask_windows_height 19
static unsigned char mask_windows_bits[] = {
0x01, 0x00, 0x03, 0x00, 0x07, 0x00, 0x0f, 0x00, 0x1f, 0x00,
0x3f, 0x00, 0x7f, 0x00, 0xff, 0x00, 0xff, 0x01, 0xff, 0x03,
0xff, 0x07, 0x7f, 0x00, 0xf7, 0x00, 0xf3, 0x00, 0xe1, 0x01,
0xe0, 0x01, 0xc0, 0x03, 0xc0, 0x03, 0x80, 0x01};
static uint32_t get_colorpixel(char *hex) {
char strgroups[3][3] = {
{hex[0], hex[1], '\0'}, {hex[2], hex[3], '\0'}, {hex[4], hex[5], '\0'}};
uint32_t rgb16[3] = {(strtol(strgroups[0], NULL, 16)),
(strtol(strgroups[1], NULL, 16)),
(strtol(strgroups[2], NULL, 16))};
return (rgb16[0] << 16) + (rgb16[1] << 8) + rgb16[2];
}
xcb_visualtype_t *get_root_visual_type(xcb_screen_t *screen) {
xcb_visualtype_t *visual_type = NULL;
xcb_depth_iterator_t depth_iter;
xcb_visualtype_iterator_t visual_iter;
for (depth_iter = xcb_screen_allowed_depths_iterator(screen);
depth_iter.rem; xcb_depth_next(&depth_iter)) {
for (visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
visual_iter.rem; xcb_visualtype_next(&visual_iter)) {
if (screen->root_visual != visual_iter.data->visual_id)
continue;
visual_type = visual_iter.data;
return visual_type;
}
}
return NULL;
}
xcb_pixmap_t create_bg_pixmap(xcb_connection_t *conn, xcb_screen_t *scr,
u_int32_t *resolution, char *color);
xcb_pixmap_t create_fg_pixmap(xcb_connection_t *conn, xcb_screen_t *scr,
u_int32_t *resolution) {
/* Generate a big enough pixmap */
xcb_pixmap_t final_pixmap = xcb_generate_id(conn);
xcb_create_pixmap(conn, scr->root_depth, final_pixmap, scr->root,
resolution[0], resolution[1]);
xcb_gcontext_t gc = xcb_generate_id(conn);
const uint32_t gc_values[] = {1};
xcb_create_gc(conn, gc, screen->root, XCB_GC_SUBWINDOW_MODE, gc_values);
/* Iterate over all root window children */
xcb_query_tree_reply_t *reply =
xcb_query_tree_reply(conn, xcb_query_tree(conn, scr->root), NULL);
xcb_window_t *children = xcb_query_tree_children(reply);
xcb_get_window_attributes_cookie_t *attribs =
(xcb_get_window_attributes_cookie_t *)malloc(
sizeof(xcb_get_window_attributes_cookie_t) * reply->children_len);
xcb_get_geometry_cookie_t *geos = (xcb_get_geometry_cookie_t *)malloc(
sizeof(xcb_get_geometry_cookie_t) * reply->children_len);
if (!attribs || !geos) {
goto END;
}
for (int i = 0; i < reply->children_len; ++i) {
/* Get attributes to check if input-only window */
attribs[i] = xcb_get_window_attributes(conn, children[i]);
geos[i] = xcb_get_geometry(conn, children[i]);
}
/* Copy root window background to final_pixmap */
xcb_copy_area(conn, scr->root, final_pixmap, gc, 0, 0, 0, 0, resolution[0],
resolution[1]);
for (int i = 0; i < reply->children_len; ++i) {
/* Get attributes to check if input-only window */
xcb_get_window_attributes_reply_t *attrib =
xcb_get_window_attributes_reply(conn, attribs[i], NULL);
/* If attributes are NULL then the window was destroyed */
if (!attrib) {
continue;
}
if (attrib->_class == XCB_WINDOW_CLASS_INPUT_ONLY) {
free(attrib);
continue;
}
free(attrib);
/* Copy area to final_pixmap */
xcb_get_geometry_reply_t *geo =
xcb_get_geometry_reply(conn, geos[i], NULL);
xcb_copy_area(conn, children[i], final_pixmap, gc, 0, 0, geo->x, geo->y,
geo->width, geo->height);
free(geo);
}
free(geos);
free(attribs);
END:
free(reply);
xcb_free_gc(conn, gc);
return final_pixmap;
}
xcb_pixmap_t create_bg_pixmap(xcb_connection_t *conn, xcb_screen_t *scr,
u_int32_t *resolution, char *color) {
xcb_pixmap_t bg_pixmap = xcb_generate_id(conn);
xcb_create_pixmap(conn, scr->root_depth, bg_pixmap, scr->root,
resolution[0], resolution[1]);
/* Generate a Graphics Context and fill the pixmap with background color
* (for images that are smaller than your screen) */
xcb_gcontext_t gc = xcb_generate_id(conn);
uint32_t values[] = {get_colorpixel(color)};
xcb_create_gc(conn, gc, bg_pixmap, XCB_GC_FOREGROUND, values);
xcb_rectangle_t rect = {0, 0, resolution[0], resolution[1]};
xcb_poly_fill_rectangle(conn, bg_pixmap, gc, 1, &rect);
xcb_free_gc(conn, gc);
return bg_pixmap;
}
xcb_window_t open_overlay_window(xcb_connection_t *conn, xcb_screen_t *scr) {
xcb_composite_query_version_reply_t *ver_reply =
xcb_composite_query_version_reply(
conn, xcb_composite_query_version(conn, XCB_COMPOSITE_MAJOR_VERSION,
XCB_COMPOSITE_MINOR_VERSION),
NULL);
xcb_composite_get_overlay_window_reply_t *comp_win_reply =
xcb_composite_get_overlay_window_reply(
conn, xcb_composite_get_overlay_window(conn, scr->root), NULL);
xcb_window_t win = comp_win_reply->overlay_win;
free(ver_reply);
free(comp_win_reply);
xcb_composite_redirect_subwindows(conn, scr->root,
XCB_COMPOSITE_REDIRECT_AUTOMATIC);
xcb_change_window_attributes(
conn, scr->root, XCB_CW_EVENT_MASK,
(uint32_t[1]){XCB_EVENT_MASK_STRUCTURE_NOTIFY |
XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY});
return win;
}
xcb_window_t open_fullscreen_window(xcb_connection_t *conn, xcb_screen_t *scr,
char *color, xcb_pixmap_t pixmap) {
uint32_t mask = 0;
uint32_t values[3];
xcb_window_t win = xcb_generate_id(conn);
if (pixmap == XCB_NONE) {
mask |= XCB_CW_BACK_PIXEL;
values[0] = get_colorpixel(color);
} else {
mask |= XCB_CW_BACK_PIXMAP;
values[0] = pixmap;
}
mask |= XCB_CW_OVERRIDE_REDIRECT;
values[1] = 1;
mask |= XCB_CW_EVENT_MASK;
values[2] = XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_KEY_PRESS |
XCB_EVENT_MASK_KEY_RELEASE | XCB_EVENT_MASK_VISIBILITY_CHANGE |
XCB_EVENT_MASK_STRUCTURE_NOTIFY;
xcb_create_window(
conn, XCB_COPY_FROM_PARENT, win, /* the window id */
scr->root, /* parent == root */
0, 0, scr->width_in_pixels, scr->height_in_pixels, /* dimensions */
0, /* border = 0, we draw our own */
XCB_WINDOW_CLASS_INPUT_OUTPUT,
XCB_WINDOW_CLASS_COPY_FROM_PARENT, /* copy visual from parent */
mask, values);
char *name = "i3lock";
xcb_change_property(conn, XCB_PROP_MODE_REPLACE, win, XCB_ATOM_WM_NAME,
XCB_ATOM_STRING, 8, strlen(name), name);
/* Map the window (= make it visible) */
xcb_map_window(conn, win);
/* Raise window (put it on top) */
values[0] = XCB_STACK_MODE_ABOVE;
xcb_configure_window(conn, win, XCB_CONFIG_WINDOW_STACK_MODE, values);
/* Ensure that the window is created and set up before returning */
xcb_aux_sync(conn);
return win;
}
/*
* Repeatedly tries to grab pointer and keyboard (up to the specified number of
* tries).
*
* Returns true if the grab succeeded, false if not.
*
*/
bool grab_pointer_and_keyboard(xcb_connection_t *conn, xcb_screen_t *screen, xcb_cursor_t cursor, int tries) {
xcb_grab_pointer_cookie_t pcookie;
xcb_grab_pointer_reply_t *preply;
xcb_grab_keyboard_cookie_t kcookie;
xcb_grab_keyboard_reply_t *kreply;
const suseconds_t screen_redraw_timeout = 100000; /* 100ms */
/* Using few variables to trigger a redraw_screen() if too many tries */
bool redrawn = false;
struct timeval start;
if (gettimeofday(&start, NULL) == -1) {
err(EXIT_FAILURE, "gettimeofday");
}
while (tries-- > 0) {
pcookie = xcb_grab_pointer(
conn,
false, /* get all pointer events specified by the following mask */
screen->root, /* grab the root window */
XCB_NONE, /* which events to let through */
XCB_GRAB_MODE_ASYNC, /* pointer events should continue as normal */
XCB_GRAB_MODE_ASYNC, /* keyboard mode */
XCB_NONE, /* confine_to = in which window should the cursor stay */
cursor, /* we change the cursor to whatever the user wanted */
XCB_CURRENT_TIME);
if ((preply = xcb_grab_pointer_reply(conn, pcookie, NULL)) &&
preply->status == XCB_GRAB_STATUS_SUCCESS) {
free(preply);
break;
}
/* Make this quite a bit slower */
usleep(50);
struct timeval now;
if (gettimeofday(&now, NULL) == -1) {
err(EXIT_FAILURE, "gettimeofday");
}
struct timeval elapsed;
timersub(&now, &start, &elapsed);
if (!redrawn &&
(tries % 100) == 0 &&
elapsed.tv_usec >= screen_redraw_timeout) {
redraw_screen();
redrawn = true;
}
}
while (tries-- > 0) {
kcookie = xcb_grab_keyboard(conn, true, /* report events */
screen->root, /* grab the root window */
XCB_CURRENT_TIME,
XCB_GRAB_MODE_ASYNC, /* process events as
normal, do not
require sync */
XCB_GRAB_MODE_ASYNC);
if ((kreply = xcb_grab_keyboard_reply(conn, kcookie, NULL)) &&
kreply->status == XCB_GRAB_STATUS_SUCCESS) {
free(kreply);
break;
}
/* Make this quite a bit slower */
usleep(50);
struct timeval now;
if (gettimeofday(&now, NULL) == -1) {
err(EXIT_FAILURE, "gettimeofday");
}
struct timeval elapsed;
timersub(&now, &start, &elapsed);
/* Trigger a screen redraw if 100ms elapsed */
if (!redrawn &&
(tries % 100) == 0 &&
elapsed.tv_usec >= screen_redraw_timeout) {
redraw_screen();
redrawn = true;
}
}
return (tries > 0);
}
xcb_cursor_t create_cursor(xcb_connection_t *conn, xcb_screen_t *screen,
xcb_window_t win, int choice) {
xcb_pixmap_t bitmap;
xcb_pixmap_t mask;
xcb_cursor_t cursor;
unsigned char *curs_bits;
unsigned char *mask_bits;
int curs_w, curs_h;
switch (choice) {
case CURS_NONE:
curs_bits = curs_invisible_bits;
mask_bits = curs_invisible_bits;
curs_w = curs_invisible_width;
curs_h = curs_invisible_height;
break;
case CURS_WIN:
curs_bits = curs_windows_bits;
mask_bits = mask_windows_bits;
curs_w = curs_windows_width;
curs_h = curs_windows_height;
break;
case CURS_DEFAULT:
default:
return XCB_NONE; /* XCB_NONE is xcb's way of saying "don't change
the cursor" */
}
bitmap = xcb_create_pixmap_from_bitmap_data(conn, win, curs_bits, curs_w,
curs_h, 1, screen->white_pixel,
screen->black_pixel, NULL);
mask = xcb_create_pixmap_from_bitmap_data(conn, win, mask_bits, curs_w,
curs_h, 1, screen->white_pixel,
screen->black_pixel, NULL);
cursor = xcb_generate_id(conn);
xcb_create_cursor(conn, cursor, bitmap, mask, 65535, 65535, 65535, 0, 0, 0,
0, 0);
xcb_free_pixmap(conn, bitmap);
xcb_free_pixmap(conn, mask);
return cursor;
}
static xcb_atom_t _NET_ACTIVE_WINDOW = XCB_NONE;
void _init_net_active_window(xcb_connection_t *conn) {
if (_NET_ACTIVE_WINDOW != XCB_NONE) {
/* already initialized */
return;
}
xcb_generic_error_t *err;
xcb_intern_atom_reply_t *atom_reply = xcb_intern_atom_reply(
conn,
xcb_intern_atom(conn, 0, strlen("_NET_ACTIVE_WINDOW"), "_NET_ACTIVE_WINDOW"),
&err);
if (atom_reply == NULL) {
fprintf(stderr, "X11 Error %d\n", err->error_code);
free(err);
return;
}
_NET_ACTIVE_WINDOW = atom_reply->atom;
free(atom_reply);
}
xcb_window_t find_focused_window(xcb_connection_t *conn, const xcb_window_t root) {
xcb_window_t result = XCB_NONE;
_init_net_active_window(conn);
xcb_get_property_reply_t *prop_reply = xcb_get_property_reply(
conn,
xcb_get_property_unchecked(
conn, false, root, _NET_ACTIVE_WINDOW, XCB_GET_PROPERTY_TYPE_ANY, 0, 1 /* word */),
NULL);
if (prop_reply == NULL) {
goto out;
}
if (xcb_get_property_value_length(prop_reply) == 0) {
goto out_prop;
}
if (prop_reply->type != XCB_ATOM_WINDOW) {
goto out_prop;
}
result = *((xcb_window_t *)xcb_get_property_value(prop_reply));
out_prop:
free(prop_reply);
out:
return result;
}
void set_focused_window(xcb_connection_t *conn, const xcb_window_t root, const xcb_window_t window) {
xcb_client_message_event_t ev;
memset(&ev, '\0', sizeof(xcb_client_message_event_t));
_init_net_active_window(conn);
ev.response_type = XCB_CLIENT_MESSAGE;
ev.window = window;
ev.type = _NET_ACTIVE_WINDOW;
ev.format = 32;
ev.data.data32[0] = 2; /* 2 = pager */
xcb_send_event(conn, false, root, XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT, (char *)&ev);
xcb_flush(conn);
}