File: ewmh.c

package info (click to toggle)
evilwm 1.1.1-1
  • links: PTS, VCS
  • area: main
  • in suites: buster, sid, stretch
  • size: 332 kB
  • ctags: 426
  • sloc: ansic: 2,997; makefile: 76; sh: 30
file content (401 lines) | stat: -rw-r--r-- 13,165 bytes parent folder | download
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
/* evilwm - Minimalist Window Manager for X
 * Copyright (C) 1999-2015 Ciaran Anscomb <evilwm@6809.org.uk>
 * see README for license and other details. */

#include <stdlib.h>
#include <unistd.h>
#include "evilwm.h"
#include "log.h"

/* Standard X protocol atoms */
Atom xa_wm_state;
Atom xa_wm_protos;
Atom xa_wm_delete;
Atom xa_wm_cmapwins;

/* Motif atoms */
Atom mwm_hints;

/* evilwm atoms */
Atom xa_evilwm_unmaximised_horz;
Atom xa_evilwm_unmaximised_vert;

/* Root Window Properties (and Related Messages) */
static Atom xa_net_supported;
static Atom xa_net_client_list;
static Atom xa_net_client_list_stacking;
#ifdef VWM
static Atom xa_net_number_of_desktops;
#endif
static Atom xa_net_desktop_geometry;
static Atom xa_net_desktop_viewport;
#ifdef VWM
Atom xa_net_current_desktop;
#endif
Atom xa_net_active_window;
static Atom xa_net_workarea;
static Atom xa_net_supporting_wm_check;

/* Other Root Window Messages */
Atom xa_net_close_window;
Atom xa_net_moveresize_window;
Atom xa_net_restack_window;
Atom xa_net_request_frame_extents;

/* Application Window Properties */
static Atom xa_net_wm_name;
#ifdef VWM
Atom xa_net_wm_desktop;
#endif
Atom xa_net_wm_window_type;
Atom xa_net_wm_window_type_desktop;
Atom xa_net_wm_window_type_dock;
static Atom xa_net_wm_window_type_notification;
Atom xa_net_wm_state;
Atom xa_net_wm_state_maximized_vert;
Atom xa_net_wm_state_maximized_horz;
Atom xa_net_wm_state_fullscreen;
Atom xa_net_wm_state_hidden;
static Atom xa_net_wm_allowed_actions;
static Atom xa_net_wm_action_move;
static Atom xa_net_wm_action_resize;
static Atom xa_net_wm_action_maximize_horz;
static Atom xa_net_wm_action_maximize_vert;
static Atom xa_net_wm_action_fullscreen;
static Atom xa_net_wm_action_change_desktop;
static Atom xa_net_wm_action_close;
static Atom xa_net_wm_pid;
Atom xa_net_frame_extents;

/* Maintain a reasonably sized allocated block of memory for lists
 * of windows (for feeding to XChangeProperty in one hit). */
static Window *window_array = NULL;
static Window *alloc_window_array(void);

void ewmh_init(void) {
	/* Standard X protocol atoms */
	xa_wm_state = XInternAtom(dpy, "WM_STATE", False);
	xa_wm_protos = XInternAtom(dpy, "WM_PROTOCOLS", False);
	xa_wm_delete = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
	xa_wm_cmapwins = XInternAtom(dpy, "WM_COLORMAP_WINDOWS", False);
	/* Motif atoms */
	mwm_hints = XInternAtom(dpy, _XA_MWM_HINTS, False);
	/* evilwm atoms */
	xa_evilwm_unmaximised_horz = XInternAtom(dpy, "_EVILWM_UNMAXIMISED_HORZ", False);
	xa_evilwm_unmaximised_vert = XInternAtom(dpy, "_EVILWM_UNMAXIMISED_VERT", False);

	/*
	 * extended windowmanager hints
	 */

	/* Root Window Properties (and Related Messages) */
	xa_net_supported = XInternAtom(dpy, "_NET_SUPPORTED", False);
	xa_net_client_list = XInternAtom(dpy, "_NET_CLIENT_LIST", False);
	xa_net_client_list_stacking = XInternAtom(dpy, "_NET_CLIENT_LIST_STACKING", False);
#ifdef VWM
	xa_net_number_of_desktops = XInternAtom(dpy, "_NET_NUMBER_OF_DESKTOPS", False);
#endif
	xa_net_desktop_geometry = XInternAtom(dpy, "_NET_DESKTOP_GEOMETRY", False);
	xa_net_desktop_viewport = XInternAtom(dpy, "_NET_DESKTOP_VIEWPORT", False);
#ifdef VWM
	xa_net_current_desktop = XInternAtom(dpy, "_NET_CURRENT_DESKTOP", False);
#endif
	xa_net_active_window = XInternAtom(dpy, "_NET_ACTIVE_WINDOW", False);
	xa_net_workarea = XInternAtom(dpy, "_NET_WORKAREA", False);
	xa_net_supporting_wm_check = XInternAtom(dpy, "_NET_SUPPORTING_WM_CHECK", False);

	/* Other Root Window Messages */
	xa_net_close_window = XInternAtom(dpy, "_NET_CLOSE_WINDOW", False);
	xa_net_moveresize_window = XInternAtom(dpy, "_NET_MOVERESIZE_WINDOW", False);
	xa_net_restack_window = XInternAtom(dpy, "_NET_RESTACK_WINDOW", False);
	xa_net_request_frame_extents = XInternAtom(dpy, "_NET_REQUEST_FRAME_EXTENTS", False);

	/* Application Window Properties */
	xa_net_wm_name = XInternAtom(dpy, "_NET_WM_NAME", False);
#ifdef VWM
	xa_net_wm_desktop = XInternAtom(dpy, "_NET_WM_DESKTOP", False);
#endif
	xa_net_wm_window_type = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE", False);
	xa_net_wm_window_type_desktop = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DESKTOP", False);
	xa_net_wm_window_type_dock = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_DOCK", False);
	xa_net_wm_window_type_notification = XInternAtom(dpy, "_NET_WM_WINDOW_TYPE_NOTIFICATION", False);
	xa_net_wm_state = XInternAtom(dpy, "_NET_WM_STATE", False);
	xa_net_wm_state_maximized_vert = XInternAtom(dpy, "_NET_WM_STATE_MAXIMIZED_VERT", False);
	xa_net_wm_state_maximized_horz = XInternAtom(dpy, "_NET_WM_STATE_MAXIMIZED_HORZ", False);
	xa_net_wm_state_fullscreen = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
	xa_net_wm_state_hidden = XInternAtom(dpy, "_NET_WM_STATE_HIDDEN", False);
	xa_net_wm_allowed_actions = XInternAtom(dpy, "_NET_WM_ALLOWED_ACTIONS", False);
	xa_net_wm_action_move = XInternAtom(dpy, "_NET_WM_ACTION_MOVE", False);
	xa_net_wm_action_resize = XInternAtom(dpy, "_NET_WM_ACTION_RESIZE", False);
	xa_net_wm_action_maximize_horz = XInternAtom(dpy, "_NET_WM_ACTION_MAXIMIZE_HORZ", False);
	xa_net_wm_action_maximize_vert = XInternAtom(dpy, "_NET_WM_ACTION_MAXIMIZE_VERT", False);
	xa_net_wm_action_fullscreen = XInternAtom(dpy, "_NET_WM_ACTION_FULLSCREEN", False);
	xa_net_wm_action_change_desktop = XInternAtom(dpy, "_NET_WM_ACTION_CHANGE_DESKTOP", False);
	xa_net_wm_action_close = XInternAtom(dpy, "_NET_WM_ACTION_CLOSE", False);
	xa_net_wm_pid = XInternAtom(dpy, "_NET_WM_PID", False);
	xa_net_frame_extents = XInternAtom(dpy, "_NET_FRAME_EXTENTS", False);
}

void ewmh_init_screen(ScreenInfo *s) {
	unsigned long pid = getpid();
	Atom supported[] = {
		xa_net_client_list,
		xa_net_client_list_stacking,
#ifdef VWM
		xa_net_number_of_desktops,
#endif
		xa_net_desktop_geometry,
		xa_net_desktop_viewport,
#ifdef VWM
		xa_net_current_desktop,
#endif
		xa_net_active_window,
		xa_net_workarea,
		xa_net_supporting_wm_check,

		xa_net_close_window,
		xa_net_moveresize_window,
		xa_net_restack_window,
		xa_net_request_frame_extents,

#ifdef VWM
		xa_net_wm_desktop,
#endif
		xa_net_wm_window_type,
		xa_net_wm_window_type_desktop,
		xa_net_wm_window_type_dock,
		xa_net_wm_state,
		xa_net_wm_state_maximized_vert,
		xa_net_wm_state_maximized_horz,
		xa_net_wm_state_fullscreen,
		xa_net_wm_state_hidden,
		xa_net_wm_allowed_actions,
		/* Not sure if it makes any sense including every action here
		 * as they'll already be listed per-client in the
		 * _NET_WM_ALLOWED_ACTIONS property, but EWMH spec is unclear.
		 * */
		xa_net_wm_action_move,
		xa_net_wm_action_resize,
		xa_net_wm_action_maximize_horz,
		xa_net_wm_action_maximize_vert,
		xa_net_wm_action_fullscreen,
		xa_net_wm_action_change_desktop,
		xa_net_wm_action_close,
		xa_net_frame_extents,
	};
#ifdef VWM
	unsigned long num_desktops = 8;
	unsigned long vdesk = s->vdesk;
#endif
	unsigned long workarea[4] = {
		0, 0,
		DisplayWidth(dpy, s->screen), DisplayHeight(dpy, s->screen)
	};
	s->supporting = XCreateSimpleWindow(dpy, s->root, 0, 0, 1, 1, 0, 0, 0);
	XChangeProperty(dpy, s->root, xa_net_supported,
			XA_ATOM, 32, PropModeReplace,
			(unsigned char *)&supported,
			sizeof(supported) / sizeof(Atom));
#ifdef VWM
	XChangeProperty(dpy, s->root, xa_net_number_of_desktops,
			XA_CARDINAL, 32, PropModeReplace,
			(unsigned char *)&num_desktops, 1);
#endif
	XChangeProperty(dpy, s->root, xa_net_desktop_geometry,
			XA_CARDINAL, 32, PropModeReplace,
			(unsigned char *)&workarea[2], 2);
	XChangeProperty(dpy, s->root, xa_net_desktop_viewport,
			XA_CARDINAL, 32, PropModeReplace,
			(unsigned char *)&workarea[0], 2);
#ifdef VWM
	XChangeProperty(dpy, s->root, xa_net_current_desktop,
			XA_CARDINAL, 32, PropModeReplace,
			(unsigned char *)&vdesk, 1);
#endif
	XChangeProperty(dpy, s->root, xa_net_workarea,
			XA_CARDINAL, 32, PropModeReplace,
			(unsigned char *)&workarea, 4);
	XChangeProperty(dpy, s->root, xa_net_supporting_wm_check,
			XA_WINDOW, 32, PropModeReplace,
			(unsigned char *)&s->supporting, 1);
	XChangeProperty(dpy, s->supporting, xa_net_supporting_wm_check,
			XA_WINDOW, 32, PropModeReplace,
			(unsigned char *)&s->supporting, 1);
	XChangeProperty(dpy, s->supporting, xa_net_wm_name,
			XA_STRING, 8, PropModeReplace,
			(const unsigned char *)"evilwm", 6);
	XChangeProperty(dpy, s->supporting, xa_net_wm_pid,
			XA_CARDINAL, 32, PropModeReplace,
			(unsigned char *)&pid, 1);
}

void ewmh_deinit_screen(ScreenInfo *s) {
	XDeleteProperty(dpy, s->root, xa_net_supported);
	XDeleteProperty(dpy, s->root, xa_net_client_list);
	XDeleteProperty(dpy, s->root, xa_net_client_list_stacking);
#ifdef VWM
	XDeleteProperty(dpy, s->root, xa_net_number_of_desktops);
#endif
	XDeleteProperty(dpy, s->root, xa_net_desktop_geometry);
	XDeleteProperty(dpy, s->root, xa_net_desktop_viewport);
#ifdef VWM
	XDeleteProperty(dpy, s->root, xa_net_current_desktop);
#endif
	XDeleteProperty(dpy, s->root, xa_net_active_window);
	XDeleteProperty(dpy, s->root, xa_net_workarea);
	XDeleteProperty(dpy, s->root, xa_net_supporting_wm_check);
	XDestroyWindow(dpy, s->supporting);
}

void ewmh_init_client(Client *c) {
	Atom allowed_actions[] = {
		xa_net_wm_action_move,
		xa_net_wm_action_maximize_horz,
		xa_net_wm_action_maximize_vert,
		xa_net_wm_action_fullscreen,
		xa_net_wm_action_change_desktop,
		xa_net_wm_action_close,
		/* nelements reduced to omit this if not possible: */
		xa_net_wm_action_resize,
	};
	int nelements = sizeof(allowed_actions) / sizeof(Atom);
	/* Omit resize element if resizing not possible: */
	if (c->max_width && c->max_width == c->min_width
			&& c->max_height && c->max_height == c->min_height)
		nelements--;
	XChangeProperty(dpy, c->window, xa_net_wm_allowed_actions,
			XA_ATOM, 32, PropModeReplace,
			(unsigned char *)&allowed_actions,
			nelements);
}

void ewmh_deinit_client(Client *c) {
	XDeleteProperty(dpy, c->window, xa_net_wm_allowed_actions);
}

void ewmh_withdraw_client(Client *c) {
#ifdef VWM
	XDeleteProperty(dpy, c->window, xa_net_wm_desktop);
#endif
	XDeleteProperty(dpy, c->window, xa_net_wm_state);
}

void ewmh_select_client(Client *c) {
	clients_tab_order = list_to_head(clients_tab_order, c);
}

void ewmh_set_net_client_list(ScreenInfo *s) {
	Window *windows = alloc_window_array();
	struct list *iter;
	int i = 0;
	for (iter = clients_mapping_order; iter; iter = iter->next) {
		Client *c = iter->data;
		if (c->screen == s) {
			windows[i++] = c->window;
		}
	}
	XChangeProperty(dpy, s->root, xa_net_client_list,
			XA_WINDOW, 32, PropModeReplace,
			(unsigned char *)windows, i);
}

void ewmh_set_net_client_list_stacking(ScreenInfo *s) {
	Window *windows = alloc_window_array();
	struct list *iter;
	int i = 0;
	for (iter = clients_stacking_order; iter; iter = iter->next) {
		Client *c = iter->data;
		if (c->screen == s) {
			windows[i++] = c->window;
		}
	}
	XChangeProperty(dpy, s->root, xa_net_client_list_stacking,
			XA_WINDOW, 32, PropModeReplace,
			(unsigned char *)windows, i);
}

#ifdef VWM
void ewmh_set_net_current_desktop(ScreenInfo *s) {
	unsigned long vdesk = s->vdesk;
	XChangeProperty(dpy, s->root, xa_net_current_desktop,
			XA_CARDINAL, 32, PropModeReplace,
			(unsigned char *)&vdesk, 1);
}
#endif

void ewmh_set_net_active_window(Client *c) {
	int i;
	for (i = 0; i < num_screens; i++) {
		Window w;
		if (c && i == c->screen->screen) {
			w = c->window;
		} else {
			w = None;
		}
		XChangeProperty(dpy, screens[i].root, xa_net_active_window,
				XA_WINDOW, 32, PropModeReplace,
				(unsigned char *)&w, 1);
	}
}

#ifdef VWM
void ewmh_set_net_wm_desktop(Client *c) {
	unsigned long vdesk = c->vdesk;
	XChangeProperty(dpy, c->window, xa_net_wm_desktop,
			XA_CARDINAL, 32, PropModeReplace,
			(unsigned char *)&vdesk, 1);
}
#endif

unsigned int ewmh_get_net_wm_window_type(Window w) {
	Atom *aprop;
	unsigned long nitems, i;
	unsigned int type = 0;
	if ( (aprop = get_property(w, xa_net_wm_window_type, XA_ATOM, &nitems)) ) {
		for (i = 0; i < nitems; i++) {
			if (aprop[i] == xa_net_wm_window_type_desktop)
				type |= EWMH_WINDOW_TYPE_DESKTOP;
			if (aprop[i] == xa_net_wm_window_type_dock)
				type |= EWMH_WINDOW_TYPE_DOCK;
			if (aprop[i] == xa_net_wm_window_type_notification)
				type |= EWMH_WINDOW_TYPE_NOTIFICATION;
		}
		XFree(aprop);
	}
	return type;
}

void ewmh_set_net_wm_state(Client *c) {
	Atom state[3];
	int i = 0;
	if (c->oldh)
		state[i++] = xa_net_wm_state_maximized_vert;
	if (c->oldw)
		state[i++] = xa_net_wm_state_maximized_horz;
	if (c->oldh && c->oldw)
		state[i++] = xa_net_wm_state_fullscreen;
	XChangeProperty(dpy, c->window, xa_net_wm_state,
			XA_ATOM, 32, PropModeReplace,
			(unsigned char *)&state, i);
}

void ewmh_set_net_frame_extents(Window w) {
	unsigned long extents[4];
	extents[0] = extents[1] = extents[2] = extents[3] = opt_bw;
	XChangeProperty(dpy, w, xa_net_frame_extents,
			XA_CARDINAL, 32, PropModeReplace,
			(unsigned char *)&extents, 4);
}

static Window *alloc_window_array(void) {
	struct list *iter;
	unsigned int count = 0;
	for (iter = clients_mapping_order; iter; iter = iter->next) {
		count++;
	}
	if (count == 0) count++;
	/* Round up to next block of 128 */
	count = (count + 127) & ~127;
	window_array = realloc(window_array, count * sizeof(Window));
	return window_array;
}