main.c (view raw)
1/* (C)opyright MMVI-MMVII Anselm R. Garbe <garbeam at gmail dot com>
2 * See LICENSE file for license details.
3 */
4
5#include "dwm.h"
6#include <errno.h>
7#include <locale.h>
8#include <stdio.h>
9#include <stdlib.h>
10#include <string.h>
11#include <unistd.h>
12#include <sys/select.h>
13#include <X11/cursorfont.h>
14#include <X11/keysym.h>
15#include <X11/Xatom.h>
16#include <X11/Xproto.h>
17
18/* extern */
19
20char stext[256];
21int screen, sx, sy, sw, sh, wax, way, waw, wah;
22unsigned int bh, ntags, numlockmask;
23Atom wmatom[WMLast], netatom[NetLast];
24Bool running = True;
25Bool *seltag;
26Bool selscreen = True;
27Client *clients = NULL;
28Client *sel = NULL;
29Client *stack = NULL;
30Cursor cursor[CurLast];
31Display *dpy;
32DC dc = {0};
33Window root, barwin;
34
35/* static */
36
37static int (*xerrorxlib)(Display *, XErrorEvent *);
38static Bool otherwm, readin;
39
40static void
41cleanup(void) {
42 close(STDIN_FILENO);
43 while(stack) {
44 if(stack->isbanned)
45 XMoveWindow(dpy, stack->win, stack->x, stack->y);
46 unmanage(stack);
47 }
48 if(dc.font.set)
49 XFreeFontSet(dpy, dc.font.set);
50 else
51 XFreeFont(dpy, dc.font.xfont);
52 XUngrabKey(dpy, AnyKey, AnyModifier, root);
53 XFreePixmap(dpy, dc.drawable);
54 XFreeGC(dpy, dc.gc);
55 XDestroyWindow(dpy, barwin);
56 XFreeCursor(dpy, cursor[CurNormal]);
57 XFreeCursor(dpy, cursor[CurResize]);
58 XFreeCursor(dpy, cursor[CurMove]);
59 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
60 XSync(dpy, False);
61 free(seltag);
62}
63
64static unsigned int
65textnw(const char *text, unsigned int len) {
66 XRectangle r;
67
68 if(dc.font.set) {
69 XmbTextExtents(dc.font.set, text, len, NULL, &r);
70 return r.width;
71 }
72 return XTextWidth(dc.font.xfont, text, len);
73}
74
75static void
76drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]) {
77 int x;
78 XGCValues gcv;
79 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
80
81 gcv.foreground = col[ColFG];
82 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
83 x = (dc.font.ascent + dc.font.descent + 2) / 4;
84 r.x = dc.x + 1;
85 r.y = dc.y + 1;
86 if(filled) {
87 r.width = r.height = x + 1;
88 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
89 }
90 else if(empty) {
91 r.width = r.height = x;
92 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
93 }
94}
95
96static unsigned long
97getcolor(const char *colstr) {
98 Colormap cmap = DefaultColormap(dpy, screen);
99 XColor color;
100
101 if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
102 eprint("error, cannot allocate color '%s'\n", colstr);
103 return color.pixel;
104}
105
106static Bool
107isoccupied(unsigned int t) {
108 Client *c;
109
110 for(c = clients; c; c = c->next)
111 if(c->tags[t])
112 return True;
113 return False;
114}
115
116static void
117scan(void) {
118 unsigned int i, num;
119 Window *wins, d1, d2;
120 XWindowAttributes wa;
121
122 wins = NULL;
123 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
124 for(i = 0; i < num; i++) {
125 if(!XGetWindowAttributes(dpy, wins[i], &wa)
126 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
127 continue;
128 if(wa.map_state == IsViewable)
129 manage(wins[i], &wa);
130 }
131 }
132 if(wins)
133 XFree(wins);
134}
135
136static void
137setfont(const char *fontstr) {
138 char *def, **missing;
139 int i, n;
140
141 missing = NULL;
142 if(dc.font.set)
143 XFreeFontSet(dpy, dc.font.set);
144 dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
145 if(missing) {
146 while(n--)
147 fprintf(stderr, "missing fontset: %s\n", missing[n]);
148 XFreeStringList(missing);
149 }
150 if(dc.font.set) {
151 XFontSetExtents *font_extents;
152 XFontStruct **xfonts;
153 char **font_names;
154 dc.font.ascent = dc.font.descent = 0;
155 font_extents = XExtentsOfFontSet(dc.font.set);
156 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
157 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
158 if(dc.font.ascent < (*xfonts)->ascent)
159 dc.font.ascent = (*xfonts)->ascent;
160 if(dc.font.descent < (*xfonts)->descent)
161 dc.font.descent = (*xfonts)->descent;
162 xfonts++;
163 }
164 }
165 else {
166 if(dc.font.xfont)
167 XFreeFont(dpy, dc.font.xfont);
168 dc.font.xfont = NULL;
169 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr)))
170 eprint("error, cannot load font: '%s'\n", fontstr);
171 dc.font.ascent = dc.font.xfont->ascent;
172 dc.font.descent = dc.font.xfont->descent;
173 }
174 dc.font.height = dc.font.ascent + dc.font.descent;
175}
176
177static void
178setup(void) {
179 int i, j;
180 unsigned int mask;
181 Window w;
182 XModifierKeymap *modmap;
183 XSetWindowAttributes wa;
184
185 /* init atoms */
186 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
187 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
188 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
189 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
190 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
191 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
192 PropModeReplace, (unsigned char *) netatom, NetLast);
193 /* init cursors */
194 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
195 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
196 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
197 /* init modifier map */
198 numlockmask = 0;
199 modmap = XGetModifierMapping(dpy);
200 for (i = 0; i < 8; i++)
201 for (j = 0; j < modmap->max_keypermod; j++) {
202 if(modmap->modifiermap[i * modmap->max_keypermod + j]
203 == XKeysymToKeycode(dpy, XK_Num_Lock))
204 numlockmask = (1 << i);
205 }
206 XFreeModifiermap(modmap);
207 /* select for events */
208 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
209 | EnterWindowMask | LeaveWindowMask;
210 wa.cursor = cursor[CurNormal];
211 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
212 grabkeys();
213 compileregs();
214 for(ntags = 0; tags[ntags]; ntags++);
215 seltag = emallocz(sizeof(Bool) * ntags);
216 seltag[0] = True;
217 /* style */
218 dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
219 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
220 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
221 dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
222 dc.sel[ColBG] = getcolor(SELBGCOLOR);
223 dc.sel[ColFG] = getcolor(SELFGCOLOR);
224 setfont(FONT);
225 /* geometry */
226 sx = sy = 0;
227 sw = DisplayWidth(dpy, screen);
228 sh = DisplayHeight(dpy, screen);
229 initlayouts();
230 /* bar */
231 dc.h = bh = dc.font.height + 2;
232 wa.override_redirect = 1;
233 wa.background_pixmap = ParentRelative;
234 wa.event_mask = ButtonPressMask | ExposureMask;
235 barwin = XCreateWindow(dpy, root, sx, sy + (TOPBAR ? 0 : sh - bh), sw, bh, 0,
236 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
237 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
238 XDefineCursor(dpy, barwin, cursor[CurNormal]);
239 XMapRaised(dpy, barwin);
240 strcpy(stext, "dwm-"VERSION);
241 /* windowarea */
242 wax = sx;
243 way = sy + (TOPBAR ? bh : 0);
244 wah = sh - bh;
245 waw = sw;
246 /* pixmap for everything */
247 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
248 dc.gc = XCreateGC(dpy, root, 0, 0);
249 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
250 /* multihead support */
251 selscreen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
252}
253
254/*
255 * Startup Error handler to check if another window manager
256 * is already running.
257 */
258static int
259xerrorstart(Display *dsply, XErrorEvent *ee) {
260 otherwm = True;
261 return -1;
262}
263
264/* extern */
265
266void
267drawstatus(void) {
268 int i, x;
269
270 dc.x = dc.y = 0;
271 for(i = 0; i < ntags; i++) {
272 dc.w = textw(tags[i]);
273 if(seltag[i]) {
274 drawtext(tags[i], dc.sel);
275 drawsquare(sel && sel->tags[i], isoccupied(i), dc.sel);
276 }
277 else {
278 drawtext(tags[i], dc.norm);
279 drawsquare(sel && sel->tags[i], isoccupied(i), dc.norm);
280 }
281 dc.x += dc.w;
282 }
283 dc.w = blw;
284 drawtext(lt->symbol, dc.norm);
285 x = dc.x + dc.w;
286 dc.w = textw(stext);
287 dc.x = sw - dc.w;
288 if(dc.x < x) {
289 dc.x = x;
290 dc.w = sw - x;
291 }
292 drawtext(stext, dc.norm);
293 if((dc.w = dc.x - x) > bh) {
294 dc.x = x;
295 drawtext(sel ? sel->name : NULL, sel ? dc.sel : dc.norm);
296 }
297 XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
298 XSync(dpy, False);
299}
300
301void
302drawtext(const char *text, unsigned long col[ColLast]) {
303 int x, y, w, h;
304 static char buf[256];
305 unsigned int len, olen;
306 XGCValues gcv;
307 XRectangle r = { dc.x, dc.y, dc.w, dc.h };
308
309 XSetForeground(dpy, dc.gc, col[ColBG]);
310 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
311 if(!text)
312 return;
313 w = 0;
314 olen = len = strlen(text);
315 if(len >= sizeof buf)
316 len = sizeof buf - 1;
317 memcpy(buf, text, len);
318 buf[len] = 0;
319 h = dc.font.ascent + dc.font.descent;
320 y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
321 x = dc.x + (h / 2);
322 /* shorten text if necessary */
323 while(len && (w = textnw(buf, len)) > dc.w - h)
324 buf[--len] = 0;
325 if(len < olen) {
326 if(len > 1)
327 buf[len - 1] = '.';
328 if(len > 2)
329 buf[len - 2] = '.';
330 if(len > 3)
331 buf[len - 3] = '.';
332 }
333 if(w > dc.w)
334 return; /* too long */
335 gcv.foreground = col[ColFG];
336 if(dc.font.set) {
337 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
338 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
339 }
340 else {
341 gcv.font = dc.font.xfont->fid;
342 XChangeGC(dpy, dc.gc, GCForeground | GCFont, &gcv);
343 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
344 }
345}
346
347void
348sendevent(Window w, Atom a, long value) {
349 XEvent e;
350
351 e.type = ClientMessage;
352 e.xclient.window = w;
353 e.xclient.message_type = a;
354 e.xclient.format = 32;
355 e.xclient.data.l[0] = value;
356 e.xclient.data.l[1] = CurrentTime;
357 XSendEvent(dpy, w, False, NoEventMask, &e);
358 XSync(dpy, False);
359}
360
361unsigned int
362textw(const char *text) {
363 return textnw(text, strlen(text)) + dc.font.height;
364}
365
366void
367quit(Arg *arg) {
368 readin = running = False;
369}
370
371/* There's no way to check accesses to destroyed windows, thus those cases are
372 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
373 * default error handler, which may call exit.
374 */
375int
376xerror(Display *dpy, XErrorEvent *ee) {
377 if(ee->error_code == BadWindow
378 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
379 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
380 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
381 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
382 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
383 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
384 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
385 return 0;
386 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
387 ee->request_code, ee->error_code);
388 return xerrorxlib(dpy, ee); /* may call exit */
389}
390
391int
392main(int argc, char *argv[]) {
393 char *p;
394 int r, xfd;
395 fd_set rd;
396 XEvent ev;
397
398 if(argc == 2 && !strncmp("-v", argv[1], 3))
399 eprint("dwm-"VERSION", (C)opyright MMVI-MMVII Anselm R. Garbe\n");
400 else if(argc != 1)
401 eprint("usage: dwm [-v]\n");
402 setlocale(LC_CTYPE, "");
403 if(!(dpy = XOpenDisplay(0)))
404 eprint("dwm: cannot open display\n");
405 xfd = ConnectionNumber(dpy);
406 screen = DefaultScreen(dpy);
407 root = RootWindow(dpy, screen);
408 otherwm = False;
409 XSetErrorHandler(xerrorstart);
410 /* this causes an error if some other window manager is running */
411 XSelectInput(dpy, root, SubstructureRedirectMask);
412 XSync(dpy, False);
413 if(otherwm)
414 eprint("dwm: another window manager is already running\n");
415
416 XSync(dpy, False);
417 XSetErrorHandler(NULL);
418 xerrorxlib = XSetErrorHandler(xerror);
419 XSync(dpy, False);
420 setup();
421 drawstatus();
422 scan();
423
424 /* main event loop, also reads status text from stdin */
425 XSync(dpy, False);
426 readin = True;
427 while(running) {
428 FD_ZERO(&rd);
429 if(readin)
430 FD_SET(STDIN_FILENO, &rd);
431 FD_SET(xfd, &rd);
432 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
433 if(errno == EINTR)
434 continue;
435 eprint("select failed\n");
436 }
437 if(FD_ISSET(STDIN_FILENO, &rd)) {
438 switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
439 case -1:
440 strncpy(stext, strerror(errno), sizeof stext - 1);
441 stext[sizeof stext - 1] = '\0';
442 readin = False;
443 break;
444 case 0:
445 strncpy(stext, "EOF", 4);
446 readin = False;
447 break;
448 default:
449 for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
450 for(; p >= stext && *p != '\n'; --p);
451 if(p > stext)
452 strncpy(stext, p + 1, sizeof stext);
453 }
454 drawstatus();
455 }
456 if(FD_ISSET(xfd, &rd))
457 while(XPending(dpy)) {
458 XNextEvent(dpy, &ev);
459 if(handler[ev.type])
460 (handler[ev.type])(&ev); /* call handler */
461 }
462 }
463 cleanup();
464 XCloseDisplay(dpy);
465 return 0;
466}