main.c (view raw)
1/* See LICENSE file for copyright and license details. */
2#include "dwm.h"
3#include <errno.h>
4#include <locale.h>
5#include <stdio.h>
6#include <stdlib.h>
7#include <string.h>
8#include <unistd.h>
9#include <sys/select.h>
10#include <X11/cursorfont.h>
11#include <X11/keysym.h>
12#include <X11/Xatom.h>
13#include <X11/Xproto.h>
14#include <X11/Xutil.h>
15
16/* extern */
17
18char stext[256];
19int screen, sx, sy, sw, sh, wax, way, waw, wah;
20unsigned int bh, ntags;
21unsigned int bpos = BARPOS;
22unsigned int numlockmask = 0;
23Atom wmatom[WMLast], netatom[NetLast];
24Bool *seltags;
25Bool selscreen = True;
26Client *clients = NULL;
27Client *sel = NULL;
28Client *stack = NULL;
29Cursor cursor[CurLast];
30Display *dpy;
31DC dc = {0};
32Window root, barwin;
33
34/* static */
35
36static int (*xerrorxlib)(Display *, XErrorEvent *);
37static Bool otherwm, readin;
38static Bool running = True;
39
40static void
41cleanup(void) {
42 close(STDIN_FILENO);
43 while(stack) {
44 unban(stack);
45 unmanage(stack);
46 }
47 if(dc.font.set)
48 XFreeFontSet(dpy, dc.font.set);
49 else
50 XFreeFont(dpy, dc.font.xfont);
51 XUngrabKey(dpy, AnyKey, AnyModifier, root);
52 XFreePixmap(dpy, dc.drawable);
53 XFreeGC(dpy, dc.gc);
54 XDestroyWindow(dpy, barwin);
55 XFreeCursor(dpy, cursor[CurNormal]);
56 XFreeCursor(dpy, cursor[CurResize]);
57 XFreeCursor(dpy, cursor[CurMove]);
58 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
59 XSync(dpy, False);
60 free(seltags);
61}
62
63static unsigned long
64initcolor(const char *colstr) {
65 Colormap cmap = DefaultColormap(dpy, screen);
66 XColor color;
67
68 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
69 eprint("error, cannot allocate color '%s'\n", colstr);
70 return color.pixel;
71}
72
73static void
74initfont(const char *fontstr) {
75 char *def, **missing;
76 int i, n;
77
78 missing = NULL;
79 if(dc.font.set)
80 XFreeFontSet(dpy, dc.font.set);
81 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
82 if(missing) {
83 while(n--)
84 fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
85 XFreeStringList(missing);
86 }
87 if(dc.font.set) {
88 XFontSetExtents *font_extents;
89 XFontStruct **xfonts;
90 char **font_names;
91 dc.font.ascent = dc.font.descent = 0;
92 font_extents = XExtentsOfFontSet(dc.font.set);
93 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
94 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
95 if(dc.font.ascent < (*xfonts)->ascent)
96 dc.font.ascent = (*xfonts)->ascent;
97 if(dc.font.descent < (*xfonts)->descent)
98 dc.font.descent = (*xfonts)->descent;
99 xfonts++;
100 }
101 }
102 else {
103 if(dc.font.xfont)
104 XFreeFont(dpy, dc.font.xfont);
105 dc.font.xfont = NULL;
106 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr)))
107 eprint("error, cannot load font: '%s'\n", fontstr);
108 dc.font.ascent = dc.font.xfont->ascent;
109 dc.font.descent = dc.font.xfont->descent;
110 }
111 dc.font.height = dc.font.ascent + dc.font.descent;
112}
113
114static long
115getstate(Window w) {
116 int format, status;
117 long result = -1;
118 unsigned char *p = NULL;
119 unsigned long n, extra;
120 Atom real;
121
122 status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
123 &real, &format, &n, &extra, (unsigned char **)&p);
124 if(status != Success)
125 return -1;
126 if(n != 0)
127 result = *p;
128 XFree(p);
129 return result;
130}
131
132static void
133scan(void) {
134 unsigned int i, num;
135 Window *wins, d1, d2;
136 XWindowAttributes wa;
137
138 wins = NULL;
139 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
140 for(i = 0; i < num; i++) {
141 if(!XGetWindowAttributes(dpy, wins[i], &wa)
142 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
143 continue;
144 if(wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
145 manage(wins[i], &wa);
146 }
147 for(i = 0; i < num; i++) { /* now the transients */
148 if(!XGetWindowAttributes(dpy, wins[i], &wa))
149 continue;
150 if(XGetTransientForHint(dpy, wins[i], &d1)
151 && (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
152 manage(wins[i], &wa);
153 }
154 }
155 if(wins)
156 XFree(wins);
157}
158
159static void
160setup(void) {
161 int i, j;
162 unsigned int mask;
163 Window w;
164 XModifierKeymap *modmap;
165 XSetWindowAttributes wa;
166
167 /* init atoms */
168 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
169 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
170 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
171 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
172 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
173 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
174 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
175 PropModeReplace, (unsigned char *) netatom, NetLast);
176 /* init cursors */
177 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
178 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
179 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
180 /* init modifier map */
181 modmap = XGetModifierMapping(dpy);
182 for (i = 0; i < 8; i++)
183 for (j = 0; j < modmap->max_keypermod; j++) {
184 if(modmap->modifiermap[i * modmap->max_keypermod + j]
185 == XKeysymToKeycode(dpy, XK_Num_Lock))
186 numlockmask = (1 << i);
187 }
188 XFreeModifiermap(modmap);
189 /* select for events */
190 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
191 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
192 wa.cursor = cursor[CurNormal];
193 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
194 XSelectInput(dpy, root, wa.event_mask);
195 grabkeys();
196 compileregs();
197 for(ntags = 0; tags[ntags]; ntags++);
198 seltags = emallocz(sizeof(Bool) * ntags);
199 seltags[0] = True;
200 /* style */
201 dc.norm[ColBorder] = initcolor(NORMBORDERCOLOR);
202 dc.norm[ColBG] = initcolor(NORMBGCOLOR);
203 dc.norm[ColFG] = initcolor(NORMFGCOLOR);
204 dc.sel[ColBorder] = initcolor(SELBORDERCOLOR);
205 dc.sel[ColBG] = initcolor(SELBGCOLOR);
206 dc.sel[ColFG] = initcolor(SELFGCOLOR);
207 initfont(FONT);
208 /* geometry */
209 sx = sy = 0;
210 sw = DisplayWidth(dpy, screen);
211 sh = DisplayHeight(dpy, screen);
212 initlayouts();
213 /* bar */
214 dc.h = bh = dc.font.height + 2;
215 wa.override_redirect = 1;
216 wa.background_pixmap = ParentRelative;
217 wa.event_mask = ButtonPressMask | ExposureMask;
218 barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
219 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
220 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
221 XDefineCursor(dpy, barwin, cursor[CurNormal]);
222 updatebarpos();
223 XMapRaised(dpy, barwin);
224 strcpy(stext, "dwm-"VERSION);
225 /* pixmap for everything */
226 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
227 dc.gc = XCreateGC(dpy, root, 0, 0);
228 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
229 if(!dc.font.set)
230 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
231 /* multihead support */
232 selscreen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
233}
234
235/*
236 * Startup Error handler to check if another window manager
237 * is already running.
238 */
239static int
240xerrorstart(Display *dsply, XErrorEvent *ee) {
241 otherwm = True;
242 return -1;
243}
244
245/* extern */
246
247Bool
248gettextprop(Window w, Atom atom, char *text, unsigned int size) {
249 char **list = NULL;
250 int n;
251 XTextProperty name;
252
253 if(!text || size == 0)
254 return False;
255 text[0] = '\0';
256 XGetTextProperty(dpy, w, &name, atom);
257 if(!name.nitems)
258 return False;
259 if(name.encoding == XA_STRING)
260 strncpy(text, (char *)name.value, size - 1);
261 else {
262 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
263 && n > 0 && *list)
264 {
265 strncpy(text, *list, size - 1);
266 XFreeStringList(list);
267 }
268 }
269 text[size - 1] = '\0';
270 XFree(name.value);
271 return True;
272}
273
274void
275quit(const char *arg) {
276 readin = running = False;
277}
278
279/* There's no way to check accesses to destroyed windows, thus those cases are
280 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
281 * default error handler, which may call exit.
282 */
283int
284xerror(Display *dpy, XErrorEvent *ee) {
285 if(ee->error_code == BadWindow
286 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
287 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
288 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
289 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
290 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
291 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
292 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
293 return 0;
294 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
295 ee->request_code, ee->error_code);
296 return xerrorxlib(dpy, ee); /* may call exit */
297}
298
299int
300main(int argc, char *argv[]) {
301 char *p;
302 int r, xfd;
303 fd_set rd;
304 XEvent ev;
305
306 if(argc == 2 && !strcmp("-v", argv[1]))
307 eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
308 else if(argc != 1)
309 eprint("usage: dwm [-v]\n");
310 setlocale(LC_CTYPE, "");
311 if(!(dpy = XOpenDisplay(0)))
312 eprint("dwm: cannot open display\n");
313 xfd = ConnectionNumber(dpy);
314 screen = DefaultScreen(dpy);
315 root = RootWindow(dpy, screen);
316 otherwm = False;
317 XSetErrorHandler(xerrorstart);
318 /* this causes an error if some other window manager is running */
319 XSelectInput(dpy, root, SubstructureRedirectMask);
320 XSync(dpy, False);
321 if(otherwm)
322 eprint("dwm: another window manager is already running\n");
323
324 XSync(dpy, False);
325 XSetErrorHandler(NULL);
326 xerrorxlib = XSetErrorHandler(xerror);
327 XSync(dpy, False);
328 setup();
329 drawstatus();
330 scan();
331
332 /* main event loop, also reads status text from stdin */
333 XSync(dpy, False);
334 readin = True;
335 while(running) {
336 FD_ZERO(&rd);
337 if(readin)
338 FD_SET(STDIN_FILENO, &rd);
339 FD_SET(xfd, &rd);
340 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
341 if(errno == EINTR)
342 continue;
343 eprint("select failed\n");
344 }
345 if(FD_ISSET(STDIN_FILENO, &rd)) {
346 switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
347 case -1:
348 strncpy(stext, strerror(errno), sizeof stext - 1);
349 stext[sizeof stext - 1] = '\0';
350 readin = False;
351 break;
352 case 0:
353 strncpy(stext, "EOF", 4);
354 readin = False;
355 break;
356 default:
357 for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
358 for(; p >= stext && *p != '\n'; --p);
359 if(p > stext)
360 strncpy(stext, p + 1, sizeof stext);
361 }
362 drawstatus();
363 }
364 while(XPending(dpy)) {
365 XNextEvent(dpy, &ev);
366 if(handler[ev.type])
367 (handler[ev.type])(&ev); /* call handler */
368 }
369 }
370 cleanup();
371 XCloseDisplay(dpy);
372 return 0;
373}