File: main.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 (444 lines) | stat: -rw-r--r-- 11,860 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
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
/* 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 <stdio.h>
#include <string.h>
#include <signal.h>
#include <X11/cursorfont.h>
#include "evilwm.h"
#include "log.h"
#include "xconfig.h"

#ifdef DEBUG
int log_indent = 0;
#endif

/* Commonly used X information */
Display     *dpy;
XFontStruct *font;
Cursor      move_curs;
Cursor      resize_curs;
int         num_screens;
ScreenInfo  *screens;
#ifdef SHAPE
int         have_shape, shape_event;
#endif
#ifdef RANDR
int         have_randr, randr_event_base;
#endif

/* Things that affect user interaction */
#define CONFIG_FILE ".evilwmrc"
static const char   *opt_display = "";
static const char   *opt_font = DEF_FONT;
static const char   *opt_fg = DEF_FG;
static const char   *opt_bg = DEF_BG;
#ifdef VWM
static const char   *opt_fc = DEF_FC;
#endif
static char *opt_grabmask1 = NULL;
static char *opt_grabmask2 = NULL;
static char *opt_altmask = NULL;
unsigned int numlockmask = 0;
unsigned int grabmask1 = ControlMask|Mod1Mask;
unsigned int grabmask2 = Mod1Mask;
unsigned int altmask = ShiftMask;
static const char *const def_term[] = { DEF_TERM, NULL };
char **opt_term = (char **)def_term;
int          opt_bw = DEF_BW;
int          opt_snap = 0;
#ifdef SOLIDDRAG
int          no_solid_drag = 0;  /* use solid drag by default */
#endif
struct list  *applications = NULL;

/* Client tracking information */
struct list     *clients_tab_order = NULL;
struct list     *clients_mapping_order = NULL;
struct list     *clients_stacking_order = NULL;
Client          *current = NULL;
volatile Window initialising = None;

/* Event loop will run until this flag is set */
int wm_exit;

static void set_app(const char *arg);
static void set_app_geometry(const char *arg);
static void set_app_dock(void);
#ifdef VWM
static void set_app_vdesk(const char *arg);
static void set_app_fixed(void);
#endif

static struct xconfig_option evilwm_options[] = {
	{ XCONFIG_STRING,   "fn",           &opt_font },
	{ XCONFIG_STRING,   "display",      &opt_display },
	{ XCONFIG_STRING,   "fg",           &opt_fg },
	{ XCONFIG_STRING,   "bg",           &opt_bg },
#ifdef VWM
	{ XCONFIG_STRING,   "fc",           &opt_fc },
#endif
	{ XCONFIG_INT,      "bw",           &opt_bw },
	{ XCONFIG_STR_LIST, "term",         &opt_term },
	{ XCONFIG_INT,      "snap",         &opt_snap },
	{ XCONFIG_STRING,   "mask1",        &opt_grabmask1 },
	{ XCONFIG_STRING,   "mask2",        &opt_grabmask2 },
	{ XCONFIG_STRING,   "altmask",      &opt_altmask },
	{ XCONFIG_CALL_1,   "app",          &set_app },
	{ XCONFIG_CALL_1,   "geometry",     &set_app_geometry },
	{ XCONFIG_CALL_1,   "g",            &set_app_geometry },
	{ XCONFIG_CALL_0,   "dock",         &set_app_dock },
#ifdef VWM
	{ XCONFIG_CALL_1,   "vdesk",        &set_app_vdesk },
	{ XCONFIG_CALL_1,   "v",            &set_app_vdesk },
	{ XCONFIG_CALL_0,   "fixed",        &set_app_fixed },
	{ XCONFIG_CALL_0,   "f",            &set_app_fixed },
	{ XCONFIG_CALL_0,   "s",            &set_app_fixed },
#endif
#ifdef SOLIDDRAG
	{ XCONFIG_BOOL,     "nosoliddrag",  &no_solid_drag },
#endif
	{ XCONFIG_END, NULL, NULL }
};

static void setup_display(void);
static void *xmalloc(size_t size);
static unsigned int parse_modifiers(char *s);

#ifdef STDIO
static void helptext(void) {
	puts(
"usage: evilwm [-display display] [-term termprog] [-fn fontname]\n"
"              [-fg foreground]"
#ifdef VWM
" [-fc fixed]"
#endif
" [-bg background] [-bw borderwidth]\n"
"              [-mask1 modifiers] [-mask2 modifiers] [-altmask modifiers]\n"
"              [-snap num]"
" [-app name/class] [-g geometry] [-dock]\n"
#ifdef VWM
"              [-v vdesk] [-s]"
#endif
#ifdef SOLIDDRAG
" [-nosoliddrag]"
#endif
" [-V]"
	);
}
#else
#define helptext()
#endif

int main(int argc, char *argv[]) {
	struct sigaction act;
	int argn = 1, ret;

	{
		const char *home = getenv("HOME");
		if (home) {
			char *conffile = xmalloc(strlen(home) + sizeof(CONFIG_FILE) + 2);
			strcpy(conffile, home);
			strcat(conffile, "/" CONFIG_FILE);
			xconfig_parse_file(evilwm_options, conffile);
			free(conffile);
		}
	}
	ret = xconfig_parse_cli(evilwm_options, argc, argv, &argn);
	if (ret == XCONFIG_MISSING_ARG) {
		fprintf(stderr, "%s: missing argument to `%s'\n", argv[0], argv[argn]);
		exit(1);
	} else if (ret == XCONFIG_BAD_OPTION) {
		if (0 == strcmp(argv[argn], "-h")
				|| 0 == strcmp(argv[argn], "--help")) {
			helptext();
			exit(0);
#ifdef STDIO
		} else if (0 == strcmp(argv[argn], "-V")
				|| 0 == strcmp(argv[argn], "--version")) {
			LOG_INFO("evilwm version " VERSION "\n");
			exit(0);
#endif
		} else {
			helptext();
			exit(1);
		}
	}

	if (opt_grabmask1) grabmask1 = parse_modifiers(opt_grabmask1);
	if (opt_grabmask2) grabmask2 = parse_modifiers(opt_grabmask2);
	if (opt_altmask) altmask = parse_modifiers(opt_altmask);

	wm_exit = 0;
	act.sa_handler = handle_signal;
	sigemptyset(&act.sa_mask);
	act.sa_flags = 0;
	sigaction(SIGTERM, &act, NULL);
	sigaction(SIGINT, &act, NULL);
	sigaction(SIGHUP, &act, NULL);

	setup_display();

	event_main_loop();

	/* Quit Nicely */
	while (clients_stacking_order)
		remove_client(clients_stacking_order->data);
	XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
	if (font) XFreeFont(dpy, font);
	{
		int i;
		for (i = 0; i < num_screens; i++) {
			ewmh_deinit_screen(&screens[i]);
			XFreeGC(dpy, screens[i].invert_gc);
			XInstallColormap(dpy, DefaultColormap(dpy, i));
		}
	}
	free(screens);
	XCloseDisplay(dpy);

	return 0;
}

static void *xmalloc(size_t size) {
	void *ptr = malloc(size);
	if (!ptr) {
		/* C99 defines the 'z' printf modifier for variables of
		 * type size_t.  Fall back to casting to unsigned long. */
#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
		LOG_ERROR("out of memory, looking for %zu bytes\n", size);
#else
		LOG_ERROR("out of memory, looking for %lu bytes\n",
				(unsigned long)size);
#endif
		exit(1);
	}
	return ptr;
}

static void setup_display(void) {
	XGCValues gv;
	XSetWindowAttributes attr;
	XColor dummy;
	XModifierKeymap *modmap;
	/* used in scanning windows (XQueryTree) */
	unsigned int i, j, nwins;
	Window dw1, dw2, *wins;
	XWindowAttributes winattr;

	LOG_ENTER("setup_display()");

	dpy = XOpenDisplay(opt_display);
	if (!dpy) {
		LOG_ERROR("can't open display %s\n", opt_display);
		exit(1);
	}
	XSetErrorHandler(handle_xerror);
	/* XSynchronize(dpy, True); */

	/* Standard & EWMH atoms */
	ewmh_init();

	font = XLoadQueryFont(dpy, opt_font);
	if (!font) font = XLoadQueryFont(dpy, DEF_FONT);
	if (!font) {
		LOG_ERROR("couldn't find a font to use: try starting with -fn fontname\n");
		exit(1);
	}

	move_curs = XCreateFontCursor(dpy, XC_fleur);
	resize_curs = XCreateFontCursor(dpy, XC_plus);

	/* find out which modifier is NumLock - we'll use this when grabbing
	 * every combination of modifiers we can think of */
	modmap = XGetModifierMapping(dpy);
	for (i = 0; i < 8; i++) {
		for (j = 0; j < (unsigned int)modmap->max_keypermod; j++) {
			if (modmap->modifiermap[i*modmap->max_keypermod+j] == XKeysymToKeycode(dpy, XK_Num_Lock)) {
				numlockmask = (1<<i);
				LOG_DEBUG("XK_Num_Lock is (1<<0x%02x)\n", i);
			}
		}
	}
	XFreeModifiermap(modmap);

	/* set up GC parameters - same for each screen */
	gv.function = GXinvert;
	gv.subwindow_mode = IncludeInferiors;
	gv.line_width = 1;  /* opt_bw */
	gv.font = font->fid;

	/* set up root window attributes - same for each screen */
	attr.event_mask = ChildMask | EnterWindowMask | ColormapChangeMask;

	/* SHAPE extension? */
#ifdef SHAPE
	{
		int e_dummy;
		have_shape = XShapeQueryExtension(dpy, &shape_event, &e_dummy);
	}
#endif
	/* Xrandr extension? */
#ifdef RANDR
	{
		int e_dummy;
		have_randr = XRRQueryExtension(dpy, &randr_event_base, &e_dummy);
		if (!have_randr) {
			LOG_DEBUG("XRandR is not supported on this display.\n");
		}
	}
#endif

	/* now set up each screen in turn */
	num_screens = ScreenCount(dpy);
	if (num_screens < 0) {
		LOG_ERROR("Can't count screens\n");
		exit(1);
	}
	screens = xmalloc(num_screens * sizeof(ScreenInfo));
	for (i = 0; i < (unsigned int)num_screens; i++) {
		char *ds, *colon, *dot;
		ds = DisplayString(dpy);
		/* set up DISPLAY environment variable to use */
		colon = strrchr(ds, ':');
		screens[i].display = xmalloc(14 + strlen(ds));
		strcpy(screens[i].display, "DISPLAY=");
		strcat(screens[i].display, ds);
		if (colon && num_screens > 1) {
			colon = strrchr(screens[i].display, ':');
			dot = strchr(colon, '.');
			if (!dot)
				dot = colon + strlen(colon);
			snprintf(dot, 5, ".%d", i);
		}

		screens[i].screen = i;
		screens[i].root = RootWindow(dpy, i);
#ifdef RANDR
		if (have_randr) {
			XRRSelectInput(dpy, screens[i].root, RRScreenChangeNotifyMask);
		}
#endif
#ifdef VWM
		screens[i].vdesk = KEY_TO_VDESK(XK_1);
#endif

		XAllocNamedColor(dpy, DefaultColormap(dpy, i), opt_fg, &screens[i].fg, &dummy);
		XAllocNamedColor(dpy, DefaultColormap(dpy, i), opt_bg, &screens[i].bg, &dummy);
#ifdef VWM
		XAllocNamedColor(dpy, DefaultColormap(dpy, i), opt_fc, &screens[i].fc, &dummy);
#endif

		screens[i].invert_gc = XCreateGC(dpy, screens[i].root, GCFunction | GCSubwindowMode | GCLineWidth | GCFont, &gv);

		XChangeWindowAttributes(dpy, screens[i].root, CWEventMask, &attr);
		grab_keys_for_screen(&screens[i]);
		screens[i].docks_visible = 1;

		/* scan all the windows on this screen */
		LOG_XENTER("XQueryTree(screen=%d)", i);
		XQueryTree(dpy, screens[i].root, &dw1, &dw2, &wins, &nwins);
		LOG_XDEBUG("%d windows\n", nwins);
		LOG_XLEAVE();
		for (j = 0; j < nwins; j++) {
			XGetWindowAttributes(dpy, wins[j], &winattr);
			if (!winattr.override_redirect && winattr.map_state == IsViewable)
				make_new_client(wins[j], &screens[i]);
		}
		XFree(wins);
		ewmh_init_screen(&screens[i]);
	}
	ewmh_set_net_active_window(NULL);
	LOG_LEAVE();
}

/**************************************************************************/
/* Option parsing callbacks */

static void set_app(const char *arg) {
	Application *new = xmalloc(sizeof(Application));
	char *tmp;
	new->res_name = new->res_class = NULL;
	new->geometry_mask = 0;
	new->is_dock = 0;
#ifdef VWM
	new->vdesk = VDESK_NONE;
#endif
	if ((tmp = strchr(arg, '/'))) {
		*(tmp++) = 0;
	}
	if (strlen(arg) > 0) {
		new->res_name = xmalloc(strlen(arg)+1);
		strcpy(new->res_name, arg);
	}
	if (tmp && strlen(tmp) > 0) {
		new->res_class = xmalloc(strlen(tmp)+1);
		strcpy(new->res_class, tmp);
	}
	applications = list_prepend(applications, new);
}

static void set_app_geometry(const char *arg) {
	if (applications) {
		Application *app = applications->data;
		app->geometry_mask = XParseGeometry(arg,
				&app->x, &app->y, &app->width, &app->height);
	}
}

static void set_app_dock(void) {
	if (applications) {
		Application *app = applications->data;
		app->is_dock = 1;
	}
}

#ifdef VWM
static void set_app_vdesk(const char *arg) {
	unsigned int v = atoi(arg);
	if (applications && valid_vdesk(v)) {
		Application *app = applications->data;
		app->vdesk = v;
	}
}

static void set_app_fixed(void) {
	if (applications) {
		Application *app = applications->data;
		app->vdesk = VDESK_FIXED;
	}
}
#endif

/* Used for overriding the default WM modifiers */
static unsigned int parse_modifiers(char *s) {
	static struct {
		const char *name;
		unsigned int mask;
	} modifiers[9] = {
		{ "shift", ShiftMask },
		{ "lock", LockMask },
		{ "control", ControlMask },
		{ "alt", Mod1Mask },
		{ "mod1", Mod1Mask },
		{ "mod2", Mod2Mask },
		{ "mod3", Mod3Mask },
		{ "mod4", Mod4Mask },
		{ "mod5", Mod5Mask }
	};
	char *tmp = strtok(s, ",+");
	unsigned int ret = 0;
	int i;
	if (!tmp)
		return 0;
	do {
		for (i = 0; i < 9; i++) {
			if (!strcmp(modifiers[i].name, tmp))
				ret |= modifiers[i].mask;
		}
		tmp = strtok(NULL, ",+");
	} while (tmp);
	return ret;
}