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annotate main.c @ 460:ab4b08d49d24

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some more simplifications of intro comment in dwm.h, this should suffice for comments in dwm
author Anselm R. Garbe <arg@10kloc.org>
date Tue, 12 Sep 2006 09:50:06 +0200
parents 4e3e22673073
children 9d23330a5268
rev   line source
garbeam@0 1 /*
garbeam@0 2 * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
garbeam@0 3 * See LICENSE file for license details.
garbeam@0 4 */
garbeam@0 5
garbeam@76 6 #include "dwm.h"
garbeam@59 7 #include <errno.h>
garbeam@0 8 #include <stdio.h>
garbeam@0 9 #include <stdlib.h>
garbeam@57 10 #include <string.h>
garbeam@59 11 #include <unistd.h>
arg@138 12 #include <sys/select.h>
garbeam@0 13 #include <X11/cursorfont.h>
arg@291 14 #include <X11/keysym.h>
garbeam@0 15 #include <X11/Xatom.h>
garbeam@0 16 #include <X11/Xproto.h>
garbeam@0 17
arg@333 18 /* extern */
arg@333 19
arg@333 20 char stext[1024];
arg@333 21 Bool *seltag;
arg@362 22 int bx, by, bw, bh, bmw, mw, screen, sx, sy, sw, sh;
arg@362 23 unsigned int ntags, numlockmask;
arg@333 24 Atom wmatom[WMLast], netatom[NetLast];
arg@333 25 Bool running = True;
arg@333 26 Bool issel = True;
arg@400 27 Bool maximized = False;
arg@333 28 Client *clients = NULL;
arg@333 29 Client *sel = NULL;
arg@446 30 Client *stack = NULL;
arg@333 31 Cursor cursor[CurLast];
arg@333 32 Display *dpy;
arg@333 33 DC dc = {0};
arg@333 34 Window root, barwin;
arg@333 35
garbeam@84 36 /* static */
garbeam@0 37
arg@123 38 static int (*xerrorxlib)(Display *, XErrorEvent *);
arg@302 39 static Bool otherwm, readin;
garbeam@0 40
garbeam@0 41 static void
garbeam@76 42 cleanup()
garbeam@76 43 {
arg@302 44 close(STDIN_FILENO);
garbeam@76 45 while(sel) {
arg@99 46 resize(sel, True, TopLeft);
garbeam@76 47 unmanage(sel);
garbeam@76 48 }
arg@295 49 if(dc.font.set)
arg@295 50 XFreeFontSet(dpy, dc.font.set);
arg@295 51 else
arg@295 52 XFreeFont(dpy, dc.font.xfont);
arg@292 53 XUngrabKey(dpy, AnyKey, AnyModifier, root);
arg@295 54 XFreePixmap(dpy, dc.drawable);
arg@295 55 XFreeGC(dpy, dc.gc);
arg@309 56 XDestroyWindow(dpy, barwin);
garbeam@76 57 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
arg@292 58 XSync(dpy, False);
arg@433 59 free(seltag);
garbeam@76 60 }
garbeam@0 61
garbeam@0 62 static void
garbeam@75 63 scan()
garbeam@0 64 {
garbeam@0 65 unsigned int i, num;
arg@123 66 Window *wins, d1, d2;
garbeam@0 67 XWindowAttributes wa;
garbeam@0 68
arg@292 69 wins = NULL;
garbeam@0 70 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
garbeam@0 71 for(i = 0; i < num; i++) {
garbeam@0 72 if(!XGetWindowAttributes(dpy, wins[i], &wa))
garbeam@0 73 continue;
garbeam@0 74 if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
garbeam@0 75 continue;
garbeam@0 76 if(wa.map_state == IsViewable)
garbeam@10 77 manage(wins[i], &wa);
garbeam@0 78 }
garbeam@0 79 }
garbeam@0 80 if(wins)
garbeam@0 81 XFree(wins);
garbeam@0 82 }
garbeam@0 83
arg@333 84 static void
arg@333 85 setup()
arg@333 86 {
arg@333 87 int i, j;
arg@333 88 unsigned int mask;
arg@333 89 Window w;
arg@333 90 XModifierKeymap *modmap;
arg@333 91 XSetWindowAttributes wa;
arg@333 92
arg@333 93 /* init atoms */
arg@333 94 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
arg@333 95 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
arg@333 96 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
arg@333 97 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
arg@333 98 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
arg@333 99 PropModeReplace, (unsigned char *) netatom, NetLast);
arg@333 100
arg@333 101 /* init cursors */
arg@333 102 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
arg@333 103 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
arg@333 104 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
arg@333 105
arg@333 106 modmap = XGetModifierMapping(dpy);
arg@333 107 for (i = 0; i < 8; i++) {
arg@333 108 for (j = 0; j < modmap->max_keypermod; j++) {
arg@333 109 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))
arg@333 110 numlockmask = (1 << i);
arg@333 111 }
arg@333 112 }
arg@333 113 XFree(modmap);
arg@333 114
arg@333 115 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask | EnterWindowMask | LeaveWindowMask;
arg@333 116 wa.cursor = cursor[CurNormal];
arg@333 117 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
arg@333 118
arg@333 119 grabkeys();
arg@333 120 initrregs();
arg@333 121
arg@333 122 for(ntags = 0; tags[ntags]; ntags++);
arg@333 123 seltag = emallocz(sizeof(Bool) * ntags);
arg@333 124 seltag[0] = True;
arg@333 125
arg@333 126 /* style */
arg@353 127 dc.norm[ColBG] = getcolor(NORMBGCOLOR);
arg@353 128 dc.norm[ColFG] = getcolor(NORMFGCOLOR);
arg@353 129 dc.sel[ColBG] = getcolor(SELBGCOLOR);
arg@353 130 dc.sel[ColFG] = getcolor(SELFGCOLOR);
arg@353 131 dc.status[ColBG] = getcolor(STATUSBGCOLOR);
arg@353 132 dc.status[ColFG] = getcolor(STATUSFGCOLOR);
arg@333 133 setfont(FONT);
arg@333 134
arg@362 135 bmw = textw(FLOATSYMBOL) > textw(TILESYMBOL) ? textw(FLOATSYMBOL) : textw(TILESYMBOL);
arg@333 136 sx = sy = 0;
arg@333 137 sw = DisplayWidth(dpy, screen);
arg@333 138 sh = DisplayHeight(dpy, screen);
arg@333 139 mw = (sw * MASTERW) / 100;
arg@333 140
arg@333 141 bx = by = 0;
arg@333 142 bw = sw;
arg@353 143 dc.h = bh = dc.font.height + 2;
arg@333 144 wa.override_redirect = 1;
arg@333 145 wa.background_pixmap = ParentRelative;
arg@333 146 wa.event_mask = ButtonPressMask | ExposureMask;
arg@333 147 barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
arg@333 148 CopyFromParent, DefaultVisual(dpy, screen),
arg@333 149 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
arg@333 150 XDefineCursor(dpy, barwin, cursor[CurNormal]);
arg@333 151 XMapRaised(dpy, barwin);
arg@333 152
arg@333 153 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
arg@333 154 dc.gc = XCreateGC(dpy, root, 0, 0);
arg@344 155 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
arg@333 156
arg@333 157 issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
arg@333 158 strcpy(stext, "dwm-"VERSION);
arg@333 159 }
arg@333 160
garbeam@76 161 /*
garbeam@76 162 * Startup Error handler to check if another window manager
garbeam@76 163 * is already running.
garbeam@76 164 */
garbeam@76 165 static int
garbeam@76 166 xerrorstart(Display *dsply, XErrorEvent *ee)
garbeam@76 167 {
garbeam@76 168 otherwm = True;
garbeam@76 169 return -1;
garbeam@76 170 }
garbeam@76 171
garbeam@84 172 /* extern */
garbeam@84 173
garbeam@13 174 int
garbeam@75 175 getproto(Window w)
garbeam@13 176 {
arg@329 177 int i, format, protos, status;
arg@328 178 unsigned long extra, res;
arg@328 179 Atom *protocols, real;
garbeam@13 180
arg@329 181 protos = 0;
arg@329 182 status = XGetWindowProperty(dpy, w, wmatom[WMProtocols], 0L, 20L, False,
arg@329 183 XA_ATOM, &real, &format, &res, &extra, (unsigned char **)&protocols);
arg@328 184 if(status != Success || protocols == 0)
garbeam@13 185 return protos;
arg@329 186 for(i = 0; i < res; i++)
garbeam@77 187 if(protocols[i] == wmatom[WMDelete])
arg@157 188 protos |= PROTODELWIN;
arg@328 189 free(protocols);
garbeam@13 190 return protos;
garbeam@13 191 }
garbeam@13 192
garbeam@13 193 void
garbeam@74 194 sendevent(Window w, Atom a, long value)
garbeam@13 195 {
garbeam@13 196 XEvent e;
garbeam@13 197
garbeam@13 198 e.type = ClientMessage;
garbeam@13 199 e.xclient.window = w;
garbeam@13 200 e.xclient.message_type = a;
garbeam@13 201 e.xclient.format = 32;
garbeam@13 202 e.xclient.data.l[0] = value;
garbeam@13 203 e.xclient.data.l[1] = CurrentTime;
garbeam@13 204 XSendEvent(dpy, w, False, NoEventMask, &e);
garbeam@79 205 XSync(dpy, False);
garbeam@13 206 }
garbeam@13 207
garbeam@76 208 void
garbeam@76 209 quit(Arg *arg)
garbeam@75 210 {
arg@302 211 readin = running = False;
garbeam@75 212 }
garbeam@75 213
garbeam@75 214 /*
garbeam@84 215 * There's no way to check accesses to destroyed windows, thus those cases are
garbeam@84 216 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
arg@455 217 * default error handler, which may call exit.
garbeam@0 218 */
garbeam@10 219 int
garbeam@75 220 xerror(Display *dpy, XErrorEvent *ee)
garbeam@0 221 {
garbeam@75 222 if(ee->error_code == BadWindow
arg@123 223 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
arg@123 224 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
arg@123 225 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
arg@123 226 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
arg@123 227 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
arg@458 228 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
arg@458 229 || (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
garbeam@0 230 return 0;
garbeam@34 231 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
arg@123 232 ee->request_code, ee->error_code);
arg@455 233 return xerrorxlib(dpy, ee); /* may call exit */
garbeam@27 234 }
garbeam@27 235
garbeam@0 236 int
garbeam@0 237 main(int argc, char *argv[])
garbeam@0 238 {
arg@333 239 int r, xfd;
garbeam@59 240 fd_set rd;
garbeam@0 241
arg@137 242 if(argc == 2 && !strncmp("-v", argv[1], 3)) {
arg@137 243 fputs("dwm-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
arg@137 244 exit(EXIT_SUCCESS);
garbeam@0 245 }
arg@137 246 else if(argc != 1)
arg@137 247 eprint("usage: dwm [-v]\n");
garbeam@0 248
garbeam@0 249 dpy = XOpenDisplay(0);
garbeam@0 250 if(!dpy)
arg@197 251 eprint("dwm: cannot open display\n");
garbeam@0 252
arg@265 253 xfd = ConnectionNumber(dpy);
garbeam@0 254 screen = DefaultScreen(dpy);
garbeam@0 255 root = RootWindow(dpy, screen);
garbeam@0 256
garbeam@75 257 otherwm = False;
garbeam@75 258 XSetErrorHandler(xerrorstart);
arg@197 259 /* this causes an error if some other window manager is running */
garbeam@0 260 XSelectInput(dpy, root, SubstructureRedirectMask);
garbeam@78 261 XSync(dpy, False);
garbeam@0 262
garbeam@75 263 if(otherwm)
garbeam@75 264 eprint("dwm: another window manager is already running\n");
garbeam@0 265
arg@292 266 XSync(dpy, False);
garbeam@78 267 XSetErrorHandler(NULL);
garbeam@75 268 xerrorxlib = XSetErrorHandler(xerror);
arg@275 269 XSync(dpy, False);
garbeam@0 270
arg@333 271 setup();
garbeam@74 272 drawstatus();
garbeam@75 273 scan();
garbeam@3 274
arg@214 275 /* main event loop, also reads status text from stdin */
arg@242 276 XSync(dpy, False);
arg@292 277 procevent();
arg@302 278 readin = True;
garbeam@5 279 while(running) {
garbeam@59 280 FD_ZERO(&rd);
arg@164 281 if(readin)
arg@164 282 FD_SET(STDIN_FILENO, &rd);
arg@265 283 FD_SET(xfd, &rd);
arg@333 284 r = select(xfd + 1, &rd, NULL, NULL, NULL);
arg@333 285 if((r == -1) && (errno == EINTR))
garbeam@59 286 continue;
arg@333 287 if(r > 0) {
arg@164 288 if(readin && FD_ISSET(STDIN_FILENO, &rd)) {
arg@164 289 readin = NULL != fgets(stext, sizeof(stext), stdin);
arg@164 290 if(readin)
arg@164 291 stext[strlen(stext) - 1] = 0;
arg@162 292 else
arg@164 293 strcpy(stext, "broken pipe");
garbeam@74 294 drawstatus();
garbeam@59 295 }
garbeam@59 296 }
arg@333 297 else if(r < 0)
arg@316 298 eprint("select failed\n");
arg@293 299 procevent();
garbeam@5 300 }
garbeam@0 301 cleanup();
garbeam@0 302 XCloseDisplay(dpy);
garbeam@0 303
garbeam@0 304 return 0;
garbeam@0 305 }