dwm-meillo: 026aba558fdf main.c

dwm-meillo

view main.c @ 452:026aba558fdf

added some comments

author	Anselm R. Garbe <arg@10kloc.org>
date	Mon, 11 Sep 2006 07:40:41 +0200
parents	a6b8994af164
children	4e3e22673073

line source

1 /*

2 * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>

3 * See LICENSE file for license details.

4 */

6 #include "dwm.h"

7 #include <errno.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>

18 /* extern */

20 char stext[1024];

21 Bool *seltag;

22 int bx, by, bw, bh, bmw, mw, screen, sx, sy, sw, sh;

23 unsigned int ntags, numlockmask;

24 Atom wmatom[WMLast], netatom[NetLast];

25 Bool running = True;

26 Bool issel = True;

27 Bool maximized = False;

28 Client *clients = NULL;

29 Client *sel = NULL;

30 Client *stack = NULL;

31 Cursor cursor[CurLast];

32 Display *dpy;

33 DC dc = {0};

34 Window root, barwin;

36 /* static */

38 static int (*xerrorxlib)(Display *, XErrorEvent *);

39 static Bool otherwm, readin;

41 static void

42 cleanup()

43 {

44 close(STDIN_FILENO);

45 while(sel) {

46 resize(sel, True, TopLeft);

47 unmanage(sel);

48 }

49 if(dc.font.set)

50 XFreeFontSet(dpy, dc.font.set);

51 else

52 XFreeFont(dpy, dc.font.xfont);

53 XUngrabKey(dpy, AnyKey, AnyModifier, root);

54 XFreePixmap(dpy, dc.drawable);

55 XFreeGC(dpy, dc.gc);

56 XDestroyWindow(dpy, barwin);

57 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);

58 XSync(dpy, False);

59 free(seltag);

60 }

62 static void

63 scan()

64 {

65 unsigned int i, num;

66 Window *wins, d1, d2;

67 XWindowAttributes wa;

69 wins = NULL;

70 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {

71 for(i = 0; i < num; i++) {

72 if(!XGetWindowAttributes(dpy, wins[i], &wa))

73 continue;

74 if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))

75 continue;

76 if(wa.map_state == IsViewable)

77 manage(wins[i], &wa);

78 }

79 }

80 if(wins)

81 XFree(wins);

82 }

84 static void

85 setup()

86 {

87 int i, j;

88 unsigned int mask;

89 Window w;

90 XModifierKeymap *modmap;

91 XSetWindowAttributes wa;

93 /* init atoms */

94 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);

95 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);

96 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);

97 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);

98 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,

99 PropModeReplace, (unsigned char *) netatom, NetLast);

100

101 /* init cursors */

102 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);

103 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);

104 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);

105

106 modmap = XGetModifierMapping(dpy);

107 for (i = 0; i < 8; i++) {

108 for (j = 0; j < modmap->max_keypermod; j++) {

109 if(modmap->modifiermap[i * modmap->max_keypermod + j] == XKeysymToKeycode(dpy, XK_Num_Lock))

110 numlockmask = (1 << i);

111 }

112 }

113 XFree(modmap);

114

115 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask | EnterWindowMask | LeaveWindowMask;

116 wa.cursor = cursor[CurNormal];

117 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);

118

119 grabkeys();

120 initrregs();

121

122 for(ntags = 0; tags[ntags]; ntags++);

123 seltag = emallocz(sizeof(Bool) * ntags);

124 seltag[0] = True;

125

126 /* style */

127 dc.norm[ColBG] = getcolor(NORMBGCOLOR);

128 dc.norm[ColFG] = getcolor(NORMFGCOLOR);

129 dc.sel[ColBG] = getcolor(SELBGCOLOR);

130 dc.sel[ColFG] = getcolor(SELFGCOLOR);

131 dc.status[ColBG] = getcolor(STATUSBGCOLOR);

132 dc.status[ColFG] = getcolor(STATUSFGCOLOR);

133 setfont(FONT);

134

135 bmw = textw(FLOATSYMBOL) > textw(TILESYMBOL) ? textw(FLOATSYMBOL) : textw(TILESYMBOL);

136 sx = sy = 0;

137 sw = DisplayWidth(dpy, screen);

138 sh = DisplayHeight(dpy, screen);

139 mw = (sw * MASTERW) / 100;

140

141 bx = by = 0;

142 bw = sw;

143 dc.h = bh = dc.font.height + 2;

144 wa.override_redirect = 1;

145 wa.background_pixmap = ParentRelative;

146 wa.event_mask = ButtonPressMask | ExposureMask;

147 barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),

148 CopyFromParent, DefaultVisual(dpy, screen),

149 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);

150 XDefineCursor(dpy, barwin, cursor[CurNormal]);

151 XMapRaised(dpy, barwin);

152

153 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));

154 dc.gc = XCreateGC(dpy, root, 0, 0);

155 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);

156

157 issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);

158 strcpy(stext, "dwm-"VERSION);

159 }

160

161 /*

162 * Startup Error handler to check if another window manager

163 * is already running.

164 */

165 static int

166 xerrorstart(Display *dsply, XErrorEvent *ee)

167 {

168 otherwm = True;

169 return -1;

170 }

171

172 /* extern */

173

174 int

175 getproto(Window w)

176 {

177 int i, format, protos, status;

178 unsigned long extra, res;

179 Atom *protocols, real;

180

181 protos = 0;

182 status = XGetWindowProperty(dpy, w, wmatom[WMProtocols], 0L, 20L, False,

183 XA_ATOM, &real, &format, &res, &extra, (unsigned char **)&protocols);

184 if(status != Success || protocols == 0)

185 return protos;

186 for(i = 0; i < res; i++)

187 if(protocols[i] == wmatom[WMDelete])

188 protos |= PROTODELWIN;

189 free(protocols);

190 return protos;

191 }

192

193 void

194 sendevent(Window w, Atom a, long value)

195 {

196 XEvent e;

197

198 e.type = ClientMessage;

199 e.xclient.window = w;

200 e.xclient.message_type = a;

201 e.xclient.format = 32;

202 e.xclient.data.l[0] = value;

203 e.xclient.data.l[1] = CurrentTime;

204 XSendEvent(dpy, w, False, NoEventMask, &e);

205 XSync(dpy, False);

206 }

207

208 void

209 quit(Arg *arg)

210 {

211 readin = running = False;

212 }

213

214 /*

215 * There's no way to check accesses to destroyed windows, thus those cases are

216 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs

217 * default error handler, which calls exit().

218 */

219 int

220 xerror(Display *dpy, XErrorEvent *ee)

221 {

222 if(ee->error_code == BadWindow

223 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)

224 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)

225 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)

226 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)

227 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)

228 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess))

229 return 0;

230 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",

231 ee->request_code, ee->error_code);

232 return xerrorxlib(dpy, ee); /* may call exit() */

233 }

234

235 int

236 main(int argc, char *argv[])

237 {

238 int r, xfd;

239 fd_set rd;

240

241 if(argc == 2 && !strncmp("-v", argv[1], 3)) {

242 fputs("dwm-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);

243 exit(EXIT_SUCCESS);

244 }

245 else if(argc != 1)

246 eprint("usage: dwm [-v]\n");

247

248 dpy = XOpenDisplay(0);

249 if(!dpy)

250 eprint("dwm: cannot open display\n");

251

252 xfd = ConnectionNumber(dpy);

253 screen = DefaultScreen(dpy);

254 root = RootWindow(dpy, screen);

255

256 otherwm = False;

257 XSetErrorHandler(xerrorstart);

258 /* this causes an error if some other window manager is running */

259 XSelectInput(dpy, root, SubstructureRedirectMask);

260 XSync(dpy, False);

261

262 if(otherwm)

263 eprint("dwm: another window manager is already running\n");

264

265 XSync(dpy, False);

266 XSetErrorHandler(NULL);

267 xerrorxlib = XSetErrorHandler(xerror);

268 XSync(dpy, False);

269

270 setup();

271 drawstatus();

272 scan();

273

274 /* main event loop, also reads status text from stdin */

275 XSync(dpy, False);

276 procevent();

277 readin = True;

278 while(running) {

279 FD_ZERO(&rd);

280 if(readin)

281 FD_SET(STDIN_FILENO, &rd);

282 FD_SET(xfd, &rd);

283 r = select(xfd + 1, &rd, NULL, NULL, NULL);

284 if((r == -1) && (errno == EINTR))

285 continue;

286 if(r > 0) {

287 if(readin && FD_ISSET(STDIN_FILENO, &rd)) {

288 readin = NULL != fgets(stext, sizeof(stext), stdin);

289 if(readin)

290 stext[strlen(stext) - 1] = 0;

291 else

292 strcpy(stext, "broken pipe");

293 drawstatus();

294 }

295 }

296 else if(r < 0)

297 eprint("select failed\n");

298 procevent();

299 }

300 cleanup();

301 XCloseDisplay(dpy);

302

303 return 0;

304 }