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 void
115scan(void) {
116 unsigned int i, num;
117 Window *wins, d1, d2;
118 XWindowAttributes wa;
119
120 wins = NULL;
121 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
122 for(i = 0; i < num; i++) {
123 if(!XGetWindowAttributes(dpy, wins[i], &wa)
124 || wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
125 continue;
126 if(wa.map_state == IsViewable)
127 manage(wins[i], &wa);
128 }
129 }
130 if(wins)
131 XFree(wins);
132}
133
134static void
135setup(void) {
136 int i, j;
137 unsigned int mask;
138 Window w;
139 XModifierKeymap *modmap;
140 XSetWindowAttributes wa;
141
142 /* init atoms */
143 dwmprops = XInternAtom(dpy, "_DWM_PROPERTIES", False);
144 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
145 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
146 wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
147 wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
148 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
149 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
150 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
151 PropModeReplace, (unsigned char *) netatom, NetLast);
152 /* init cursors */
153 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
154 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
155 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
156 /* init modifier map */
157 modmap = XGetModifierMapping(dpy);
158 for (i = 0; i < 8; i++)
159 for (j = 0; j < modmap->max_keypermod; j++) {
160 if(modmap->modifiermap[i * modmap->max_keypermod + j]
161 == XKeysymToKeycode(dpy, XK_Num_Lock))
162 numlockmask = (1 << i);
163 }
164 XFreeModifiermap(modmap);
165 /* select for events */
166 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
167 | EnterWindowMask | LeaveWindowMask | StructureNotifyMask;
168 wa.cursor = cursor[CurNormal];
169 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
170 XSelectInput(dpy, root, wa.event_mask);
171 grabkeys();
172 compileregs();
173 for(ntags = 0; tags[ntags]; ntags++);
174 seltags = emallocz(sizeof(Bool) * ntags);
175 seltags[0] = True;
176 /* style */
177 dc.norm[ColBorder] = initcolor(NORMBORDERCOLOR);
178 dc.norm[ColBG] = initcolor(NORMBGCOLOR);
179 dc.norm[ColFG] = initcolor(NORMFGCOLOR);
180 dc.sel[ColBorder] = initcolor(SELBORDERCOLOR);
181 dc.sel[ColBG] = initcolor(SELBGCOLOR);
182 dc.sel[ColFG] = initcolor(SELFGCOLOR);
183 initfont(FONT);
184 /* geometry */
185 sx = sy = 0;
186 sw = DisplayWidth(dpy, screen);
187 sh = DisplayHeight(dpy, screen);
188 initlayouts();
189 /* bar */
190 dc.h = bh = dc.font.height + 2;
191 wa.override_redirect = 1;
192 wa.background_pixmap = ParentRelative;
193 wa.event_mask = ButtonPressMask | ExposureMask;
194 barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
195 DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
196 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
197 XDefineCursor(dpy, barwin, cursor[CurNormal]);
198 updatebarpos();
199 XMapRaised(dpy, barwin);
200 strcpy(stext, "dwm-"VERSION);
201 /* pixmap for everything */
202 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
203 dc.gc = XCreateGC(dpy, root, 0, 0);
204 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
205 if(!dc.font.set)
206 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
207 /* multihead support */
208 selscreen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
209 getdwmprops();
210}
211
212/*
213 * Startup Error handler to check if another window manager
214 * is already running.
215 */
216static int
217xerrorstart(Display *dsply, XErrorEvent *ee) {
218 otherwm = True;
219 return -1;
220}
221
222/* extern */
223
224Bool
225gettextprop(Window w, Atom atom, char *text, unsigned int size) {
226 char **list = NULL;
227 int n;
228 XTextProperty name;
229
230 if(!text || size == 0)
231 return False;
232 text[0] = '\0';
233 XGetTextProperty(dpy, w, &name, atom);
234 if(!name.nitems)
235 return False;
236 if(name.encoding == XA_STRING)
237 strncpy(text, (char *)name.value, size - 1);
238 else {
239 if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
240 && n > 0 && *list)
241 {
242 strncpy(text, *list, size - 1);
243 XFreeStringList(list);
244 }
245 }
246 text[size - 1] = '\0';
247 XFree(name.value);
248 return True;
249}
250
251void
252quit(const char *arg) {
253 readin = running = False;
254}
255
256/* There's no way to check accesses to destroyed windows, thus those cases are
257 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
258 * default error handler, which may call exit.
259 */
260int
261xerror(Display *dpy, XErrorEvent *ee) {
262 if(ee->error_code == BadWindow
263 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
264 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
265 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
266 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
267 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
268 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
269 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
270 return 0;
271 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
272 ee->request_code, ee->error_code);
273 return xerrorxlib(dpy, ee); /* may call exit */
274}
275
276int
277main(int argc, char *argv[]) {
278 char *p;
279 int r, xfd;
280 fd_set rd;
281 XEvent ev;
282
283 if(argc == 2 && !strcmp("-v", argv[1]))
284 eprint("dwm-"VERSION", © 2006-2007 A. R. Garbe, S. van Dijk, J. Salmi, P. Hruby, S. Nagy\n");
285 else if(argc != 1)
286 eprint("usage: dwm [-v]\n");
287 setlocale(LC_CTYPE, "");
288 if(!(dpy = XOpenDisplay(0)))
289 eprint("dwm: cannot open display\n");
290 xfd = ConnectionNumber(dpy);
291 screen = DefaultScreen(dpy);
292 root = RootWindow(dpy, screen);
293 otherwm = False;
294 XSetErrorHandler(xerrorstart);
295 /* this causes an error if some other window manager is running */
296 XSelectInput(dpy, root, SubstructureRedirectMask);
297 XSync(dpy, False);
298 if(otherwm)
299 eprint("dwm: another window manager is already running\n");
300
301 XSync(dpy, False);
302 XSetErrorHandler(NULL);
303 xerrorxlib = XSetErrorHandler(xerror);
304 XSync(dpy, False);
305 setup();
306 drawstatus();
307 scan();
308
309 /* main event loop, also reads status text from stdin */
310 XSync(dpy, False);
311 readin = True;
312 while(running) {
313 FD_ZERO(&rd);
314 if(readin)
315 FD_SET(STDIN_FILENO, &rd);
316 FD_SET(xfd, &rd);
317 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
318 if(errno == EINTR)
319 continue;
320 eprint("select failed\n");
321 }
322 if(FD_ISSET(STDIN_FILENO, &rd)) {
323 switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
324 case -1:
325 strncpy(stext, strerror(errno), sizeof stext - 1);
326 stext[sizeof stext - 1] = '\0';
327 readin = False;
328 break;
329 case 0:
330 strncpy(stext, "EOF", 4);
331 readin = False;
332 break;
333 default:
334 for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
335 for(; p >= stext && *p != '\n'; --p);
336 if(p > stext)
337 strncpy(stext, p + 1, sizeof stext);
338 }
339 drawstatus();
340 }
341 while(XPending(dpy)) {
342 XNextEvent(dpy, &ev);
343 if(handler[ev.type])
344 (handler[ev.type])(&ev); /* call handler */
345 }
346 }
347 cleanup();
348 XCloseDisplay(dpy);
349 return 0;
350}