aewl
view wm.c @ 0:491f34c11291
initial import
| author | Anselm R. Garbe <garbeam@wmii.de> |
|---|---|
| date | Mon, 10 Jul 2006 16:38:18 +0200 |
| parents | |
| children | a79188fe4a40 |
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 <stdarg.h>
7 #include <stdio.h>
8 #include <stdlib.h>
10 #include <X11/cursorfont.h>
11 #include <X11/Xatom.h>
12 #include <X11/Xproto.h>
14 #include "wm.h"
16 Display *dpy;
17 Window root;
18 XRectangle rect;
19 int screen, sel_screen;
20 Atom wm_atom[WMLast];
21 Atom net_atom[NetLast];
22 Cursor cursor[CurLast];
23 unsigned int kmask, numlock_mask;
24 Pixmap pmap;
26 enum { WM_PROTOCOL_DELWIN = 1 };
28 static Bool other_wm_running;
29 static int (*x_error_handler) (Display *, XErrorEvent *);
30 static char version[] = "gridwm - " VERSION ", (C)opyright MMVI Anselm R. Garbe\n";
32 static void
33 usage()
34 {
35 fputs("usage: gridwm [-v]\n", stderr);
36 exit(1);
37 }
39 void
40 error(char *errstr, ...) {
41 va_list ap;
42 va_start(ap, errstr);
43 vfprintf(stderr, errstr, ap);
44 va_end(ap);
45 exit(1);
46 }
48 static void
49 scan_wins()
50 {
51 unsigned int i, num;
52 Window *wins;
53 XWindowAttributes wa;
54 Window d1, d2;
56 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
57 for(i = 0; i < num; i++) {
58 if(!XGetWindowAttributes(dpy, wins[i], &wa))
59 continue;
60 if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
61 continue;
62 if(wa.map_state == IsViewable)
63 /*manage*/;
64 }
65 }
66 if(wins)
67 XFree(wins);
68 }
70 static int
71 win_property(Window w, Atom a, Atom t, long l, unsigned char **prop)
72 {
73 Atom real;
74 int format;
75 unsigned long res, extra;
76 int status;
78 status = XGetWindowProperty(dpy, w, a, 0L, l, False, t, &real, &format,
79 &res, &extra, prop);
81 if(status != Success || *prop == 0) {
82 return 0;
83 }
84 if(res == 0) {
85 free((void *) *prop);
86 }
87 return res;
88 }
90 int
91 win_proto(Window w)
92 {
93 Atom *protocols;
94 long res;
95 int protos = 0;
96 int i;
98 res = win_property(w, wm_atom[WMProtocols], XA_ATOM, 20L,
99 ((unsigned char **) &protocols));
100 if(res <= 0) {
101 return protos;
102 }
103 for(i = 0; i < res; i++) {
104 if(protocols[i] == wm_atom[WMDelete])
105 protos |= WM_PROTOCOL_DELWIN;
106 }
107 free((char *) protocols);
108 return protos;
109 }
111 /*
112 * There's no way to check accesses to destroyed windows, thus
113 * those cases are ignored (especially on UnmapNotify's).
114 * Other types of errors call Xlib's default error handler, which
115 * calls exit().
116 */
117 static int
118 error_handler(Display *dpy, XErrorEvent *error)
119 {
120 if(error->error_code == BadWindow
121 || (error->request_code == X_SetInputFocus
122 && error->error_code == BadMatch)
123 || (error->request_code == X_PolyText8
124 && error->error_code == BadDrawable)
125 || (error->request_code == X_PolyFillRectangle
126 && error->error_code == BadDrawable)
127 || (error->request_code == X_PolySegment
128 && error->error_code == BadDrawable)
129 || (error->request_code == X_ConfigureWindow
130 && error->error_code == BadMatch)
131 || (error->request_code == X_GrabKey
132 && error->error_code == BadAccess))
133 return 0;
134 fprintf(stderr, "gridwm: fatal error: request code=%d, error code=%d\n",
135 error->request_code, error->error_code);
136 return x_error_handler(dpy, error); /* may call exit() */
137 }
139 /*
140 * Startup Error handler to check if another window manager
141 * is already running.
142 */
143 static int
144 startup_error_handler(Display *dpy, XErrorEvent *error)
145 {
146 other_wm_running = True;
147 return -1;
148 }
150 static void
151 init_lock_keys()
152 {
153 XModifierKeymap *modmap;
154 KeyCode numlock;
155 int i;
156 static int masks[] = {
157 ShiftMask, LockMask, ControlMask, Mod1Mask,
158 Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask
159 };
161 numlock_mask = 0;
162 modmap = XGetModifierMapping(dpy);
163 numlock = XKeysymToKeycode(dpy, XStringToKeysym("Num_Lock"));
165 if(modmap && modmap->max_keypermod > 0) {
166 int max = (sizeof(masks) / sizeof(int)) * modmap->max_keypermod;
167 for(i = 0; i < max; i++)
168 if(numlock && (modmap->modifiermap[i] == numlock))
169 numlock_mask = masks[i / modmap->max_keypermod];
170 }
171 XFreeModifiermap(modmap);
173 kmask = 255 & ~(numlock_mask | LockMask);
174 }
176 static void
177 cleanup()
178 {
179 /*
180 Client *c;
181 for(c=client; c; c=c->next)
182 reparent_client(c, root, c->sel->rect.x, c->sel->rect.y);
183 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
184 */
185 }
187 int
188 main(int argc, char *argv[])
189 {
190 int i;
191 XSetWindowAttributes wa;
192 unsigned int mask;
193 Window w;
195 /* command line args */
196 for(i = 1; (i < argc) && (argv[i][0] == '-'); i++) {
197 switch (argv[i][1]) {
198 case 'v':
199 fprintf(stdout, "%s", version);
200 exit(0);
201 break;
202 default:
203 usage();
204 break;
205 }
206 }
208 dpy = XOpenDisplay(0);
209 if(!dpy)
210 error("gridwm: cannot connect X server\n");
212 screen = DefaultScreen(dpy);
213 root = RootWindow(dpy, screen);
215 /* check if another WM is already running */
216 other_wm_running = False;
217 XSetErrorHandler(startup_error_handler);
218 /* this causes an error if some other WM is running */
219 XSelectInput(dpy, root, SubstructureRedirectMask);
220 XSync(dpy, False);
222 if(other_wm_running)
223 error("gridwm: another window manager is already running\n");
225 rect.x = rect.y = 0;
226 rect.width = DisplayWidth(dpy, screen);
227 rect.height = DisplayHeight(dpy, screen);
228 sel_screen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
230 XSetErrorHandler(0);
231 x_error_handler = XSetErrorHandler(error_handler);
233 /* init atoms */
234 wm_atom[WMState] = XInternAtom(dpy, "WM_STATE", False);
235 wm_atom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
236 wm_atom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
237 net_atom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
238 net_atom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
240 XChangeProperty(dpy, root, net_atom[NetSupported], XA_ATOM, 32,
241 PropModeReplace, (unsigned char *) net_atom, NetLast);
244 /* init cursors */
245 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
246 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
247 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
249 init_lock_keys();
251 pmap = XCreatePixmap(dpy, root, rect.width, rect.height,
252 DefaultDepth(dpy, screen));
254 wa.event_mask = SubstructureRedirectMask | EnterWindowMask | LeaveWindowMask;
255 wa.cursor = cursor[CurNormal];
256 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
258 scan_wins();
260 cleanup();
261 XCloseDisplay(dpy);
263 return 0;
264 }