aewl: f617c75a8405 main.c

aewl

view main.c @ 616:f617c75a8405

improved the memory leak prevention

author	arg@mig29
date	Wed, 06 Dec 2006 11:19:06 +0100
parents	f4285a97e3e6
children	bda4880c462d

line source

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

2 * See LICENSE file for license details.

3 */

5 #include "dwm.h"

6 #include <errno.h>

7 #include <stdio.h>

8 #include <stdlib.h>

9 #include <string.h>

10 #include <unistd.h>

11 #include <sys/select.h>

12 #include <X11/cursorfont.h>

13 #include <X11/keysym.h>

14 #include <X11/Xatom.h>

15 #include <X11/Xproto.h>

17 /* extern */

19 char stext[1024];

20 Bool *seltag;

21 int bx, by, bw, bh, bmw, masterd, screen, sx, sy, sw, sh, wax, way, waw, wah;

22 unsigned int master, ntags, numlockmask;

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

24 Bool running = True;

25 Bool issel = True;

26 Client *clients = NULL;

27 Client *sel = NULL;

28 Client *stack = NULL;

29 Cursor cursor[CurLast];

30 Display *dpy;

31 DC dc = {0};

32 Window root, barwin;

34 /* static */

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

37 static Bool otherwm, readin;

39 static void

40 cleanup(void) {

41 close(STDIN_FILENO);

42 while(sel) {

43 resize(sel, True, TopLeft);

44 unmanage(sel);

45 }

46 if(dc.font.set)

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

48 else

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

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

51 XFreePixmap(dpy, dc.drawable);

52 XFreeGC(dpy, dc.gc);

53 XDestroyWindow(dpy, barwin);

54 XFreeCursor(dpy, cursor[CurNormal]);

55 XFreeCursor(dpy, cursor[CurResize]);

56 XFreeCursor(dpy, cursor[CurMove]);

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

58 XSync(dpy, False);

59 free(seltag);

60 }

62 static void

63 scan(void) {

64 unsigned int i, num;

65 Window *wins, d1, d2;

66 XWindowAttributes wa;

68 wins = NULL;

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

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

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

72 continue;

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

74 continue;

75 if(wa.map_state == IsViewable)

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

77 }

78 }

79 if(wins)

80 XFree(wins);

81 }

83 static void

84 setup(void) {

85 int i, j;

86 unsigned int mask;

87 Window w;

88 XModifierKeymap *modmap;

89 XSetWindowAttributes wa;

91 /* init atoms */

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

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

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

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

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

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

98 /* init cursors */

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

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

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

102 /* init modifier map */

103 modmap = XGetModifierMapping(dpy);

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

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

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

107 numlockmask = (1 << i);

108 }

109 }

110 XFreeModifiermap(modmap);

111 /* select for events */

112 wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask

113 | EnterWindowMask | LeaveWindowMask;

114 wa.cursor = cursor[CurNormal];

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

116 grabkeys();

117 initrregs();

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

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

120 seltag[0] = True;

121 /* style */

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

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

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

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

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

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

128 setfont(FONT);

129 /* geometry */

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

131 sx = sy = 0;

132 sw = DisplayWidth(dpy, screen);

133 sh = DisplayHeight(dpy, screen);

134 master = MASTER;

135 /* bar */

136 bx = sx;

137 by = sy;

138 bw = sw;

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

140 wa.override_redirect = 1;

141 wa.background_pixmap = ParentRelative;

142 wa.event_mask = ButtonPressMask | ExposureMask;

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

144 CopyFromParent, DefaultVisual(dpy, screen),

145 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);

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

147 XMapRaised(dpy, barwin);

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

149 /* windowarea */

150 wax = sx;

151 way = sy + bh;

152 wah = sh - bh;

153 waw = sw;

154 /* pixmap for everything */

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

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

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

158 /* multihead support */

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

160 }

161

162 /*

163 * Startup Error handler to check if another window manager

164 * is already running.

165 */

166 static int

167 xerrorstart(Display *dsply, XErrorEvent *ee) {

168 otherwm = True;

169 return -1;

170 }

171

172 /* extern */

173

174 int

175 getproto(Window w) {

176 int i, format, protos, status;

177 unsigned long extra, res;

178 Atom *protocols, real;

179

180 protos = 0;

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

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

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

184 return protos;

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

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

187 protos |= PROTODELWIN;

188 free(protocols);

189 return protos;

190 }

191

192 void

193 sendevent(Window w, Atom a, long value) {

194 XEvent e;

195

196 e.type = ClientMessage;

197 e.xclient.window = w;

198 e.xclient.message_type = a;

199 e.xclient.format = 32;

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

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

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

203 XSync(dpy, False);

204 }

205

206 void

207 quit(Arg *arg) {

208 readin = running = False;

209 }

210

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

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

213 * default error handler, which may call exit.

214 */

215 int

216 xerror(Display *dpy, XErrorEvent *ee) {

217 if(ee->error_code == BadWindow

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

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

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

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

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

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

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

225 return 0;

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

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

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

229 }

230

231 int

232 main(int argc, char *argv[]) {

233 char *p;

234 int r, xfd;

235 fd_set rd;

236

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

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

239 exit(EXIT_SUCCESS);

240 }

241 else if(argc != 1)

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

243 dpy = XOpenDisplay(0);

244 if(!dpy)

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

246 xfd = ConnectionNumber(dpy);

247 screen = DefaultScreen(dpy);

248 root = RootWindow(dpy, screen);

249 otherwm = False;

250 XSetErrorHandler(xerrorstart);

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

252 XSelectInput(dpy, root, SubstructureRedirectMask);

253 XSync(dpy, False);

254 if(otherwm)

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

256

257 XSync(dpy, False);

258 XSetErrorHandler(NULL);

259 xerrorxlib = XSetErrorHandler(xerror);

260 XSync(dpy, False);

261 setup();

262 drawstatus();

263 scan();

264

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

266 XSync(dpy, False);

267 procevent();

268 readin = True;

269 while(running) {

270 FD_ZERO(&rd);

271 if(readin)

272 FD_SET(STDIN_FILENO, &rd);

273 FD_SET(xfd, &rd);

274 if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {

275 if(errno == EINTR)

276 continue;

277 eprint("select failed\n");

278 }

279 if(FD_ISSET(STDIN_FILENO, &rd)) {

280 switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {

281 case -1:

282 strncpy(stext, strerror(errno), sizeof stext - 1);

283 stext[sizeof stext - 1] = '\0';

284 readin = False;

285 break;

286 case 0:

287 strncpy(stext, "EOF", 4);

288 readin = False;

289 break;

290 default:

291 for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');

292 for(p = stext + strlen(stext) - 1; p >= stext && *p != '\n'; --p);

293 if(p > stext)

294 strncpy(stext, p + 1, sizeof stext);

295 }

296 drawstatus();

297 }

298 if(FD_ISSET(xfd, &rd))

299 procevent();

300 }

301 cleanup();

302 XCloseDisplay(dpy);

303 return 0;

304 }