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 dwmprops, 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, NormalState);
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 dwmprops = XInternAtom(dpy, "_DWM_PROPERTIES", False);
169 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
170 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
171 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
172 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
173 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
174 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
175 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
176 PropModeReplace, (unsigned char *) netatom, NetLast);
177 /* init cursors */
178 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
179 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
180 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
181 /* init modifier map */
182 modmap = XGetModifierMapping(dpy);
183 for (i = 0; i < 8; i++)
184 for (j = 0; j < modmap->max_keypermod; j++) {
185 if(modmap->modifiermap[i * modmap->max_keypermod + j]
186 == XKeysymToKeycode(dpy, XK_Num_Lock))
187 numlockmask = (1 << i);
188 }
189 XFreeModifiermap(modmap);
190 /* select for events */
191 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
192 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
193 wa.cursor = cursor[CurNormal];
194 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
195 XSelectInput(dpy, root, wa.event_mask);
196 grabkeys();
197 compileregs();
198 for(ntags = 0; tags[ntags]; ntags++);
199 seltags = emallocz(sizeof(Bool) * ntags);
200 seltags[0] = True;
201 /* style */
202 dc.norm[ColBorder] = initcolor(NORMBORDERCOLOR);
203 dc.norm[ColBG] = initcolor(NORMBGCOLOR);
204 dc.norm[ColFG] = initcolor(NORMFGCOLOR);
205 dc.sel[ColBorder] = initcolor(SELBORDERCOLOR);
206 dc.sel[ColBG] = initcolor(SELBGCOLOR);
207 dc.sel[ColFG] = initcolor(SELFGCOLOR);
208 initfont(FONT);
209 /* geometry */
210 sx = sy = 0;
211 sw = DisplayWidth(dpy, screen);
212 sh = DisplayHeight(dpy, screen);
213 initlayouts();
214 /* bar */
215 dc.h = bh = dc.font.height + 2;
216 wa.override_redirect = 1;
217 wa.background_pixmap = ParentRelative;
218 wa.event_mask = ButtonPressMask | ExposureMask;
219 barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
220 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
221 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
222 XDefineCursor(dpy, barwin, cursor[CurNormal]);
223 updatebarpos();
224 XMapRaised(dpy, barwin);
225 strcpy(stext, "dwm-"VERSION);
226 /* pixmap for everything */
227 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
228 dc.gc = XCreateGC(dpy, root, 0, 0);
229 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
230 if(!dc.font.set)
231 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
232 /* multihead support */
233 selscreen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
234 getdwmprops();
235}
236
237/*
238 * Startup Error handler to check if another window manager
239 * is already running.
240 */
241static int
242xerrorstart(Display *dsply, XErrorEvent *ee) {
243 otherwm = True;
244 return -1;
245}
246
247/* extern */
248
249Bool
250gettextprop(Window w, Atom atom, char *text, unsigned int size) {
251 char **list = NULL;
252 int n;
253 XTextProperty name;
254
255 if(!text || size == 0)
256 return False;
257 text[0] = '\0';
258 XGetTextProperty(dpy, w, &name, atom);
259 if(!name.nitems)
260 return False;
261 if(name.encoding == XA_STRING)
262 strncpy(text, (char *)name.value, size - 1);
263 else {
264 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
265 && n > 0 && *list)
266 {
267 strncpy(text, *list, size - 1);
268 XFreeStringList(list);
269 }
270 }
271 text[size - 1] = '\0';
272 XFree(name.value);
273 return True;
274}
275
276void
277quit(const char *arg) {
278 readin = running = False;
279}
280
281/* There's no way to check accesses to destroyed windows, thus those cases are
282 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
283 * default error handler, which may call exit.
284 */
285int
286xerror(Display *dpy, XErrorEvent *ee) {
287 if(ee->error_code == BadWindow
288 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
289 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
290 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
291 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
292 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
293 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
294 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
295 return 0;
296 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
297 ee->request_code, ee->error_code);
298 return xerrorxlib(dpy, ee); /* may call exit */
299}
300
301int
302main(int argc, char *argv[]) {
303 char *p;
304 int r, xfd;
305 fd_set rd;
306 XEvent ev;
307
308 if(argc == 2 && !strcmp("-v", argv[1]))
309 eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
310 else if(argc != 1)
311 eprint("usage: dwm [-v]\n");
312 setlocale(LC_CTYPE, "");
313 if(!(dpy = XOpenDisplay(0)))
314 eprint("dwm: cannot open display\n");
315 xfd = ConnectionNumber(dpy);
316 screen = DefaultScreen(dpy);
317 root = RootWindow(dpy, screen);
318 otherwm = False;
319 XSetErrorHandler(xerrorstart);
320 /* this causes an error if some other window manager is running */
321 XSelectInput(dpy, root, SubstructureRedirectMask);
322 XSync(dpy, False);
323 if(otherwm)
324 eprint("dwm: another window manager is already running\n");
325
326 XSync(dpy, False);
327 XSetErrorHandler(NULL);
328 xerrorxlib = XSetErrorHandler(xerror);
329 XSync(dpy, False);
330 setup();
331 drawstatus();
332 scan();
333
334 /* main event loop, also reads status text from stdin */
335 XSync(dpy, False);
336 readin = True;
337 while(running) {
338 FD_ZERO(&rd);
339 if(readin)
340 FD_SET(STDIN_FILENO, &rd);
341 FD_SET(xfd, &rd);
342 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
343 if(errno == EINTR)
344 continue;
345 eprint("select failed\n");
346 }
347 if(FD_ISSET(STDIN_FILENO, &rd)) {
348 switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
349 case -1:
350 strncpy(stext, strerror(errno), sizeof stext - 1);
351 stext[sizeof stext - 1] = '\0';
352 readin = False;
353 break;
354 case 0:
355 strncpy(stext, "EOF", 4);
356 readin = False;
357 break;
358 default:
359 for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
360 for(; p >= stext && *p != '\n'; --p);
361 if(p > stext)
362 strncpy(stext, p + 1, sizeof stext);
363 }
364 drawstatus();
365 }
366 while(XPending(dpy)) {
367 XNextEvent(dpy, &ev);
368 if(handler[ev.type])
369 (handler[ev.type])(&ev); /* call handler */
370 }
371 }
372 cleanup();
373 XCloseDisplay(dpy);
374 return 0;
375}