initial import
This commit is contained in:
Anselm R. Garbe
264
wm.c
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264
wm.c
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/*
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* (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
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* See LICENSE file for license details.
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*/
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <X11/cursorfont.h>
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#include <X11/Xatom.h>
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#include <X11/Xproto.h>
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#include "wm.h"
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Display *dpy;
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Window root;
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XRectangle rect;
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int screen, sel_screen;
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Atom wm_atom[WMLast];
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Atom net_atom[NetLast];
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Cursor cursor[CurLast];
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unsigned int kmask, numlock_mask;
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Pixmap pmap;
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enum { WM_PROTOCOL_DELWIN = 1 };
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static Bool other_wm_running;
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static int (*x_error_handler) (Display *, XErrorEvent *);
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static char version[] = "gridwm - " VERSION ", (C)opyright MMVI Anselm R. Garbe\n";
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static void
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usage()
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{
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fputs("usage: gridwm [-v]\n", stderr);
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exit(1);
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}
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void
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error(char *errstr, ...) {
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va_list ap;
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va_start(ap, errstr);
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vfprintf(stderr, errstr, ap);
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va_end(ap);
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exit(1);
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}
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static void
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scan_wins()
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{
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unsigned int i, num;
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Window *wins;
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XWindowAttributes wa;
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Window d1, d2;
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if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
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for(i = 0; i < num; i++) {
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if(!XGetWindowAttributes(dpy, wins[i], &wa))
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continue;
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if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
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continue;
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if(wa.map_state == IsViewable)
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/*manage*/;
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}
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}
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if(wins)
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XFree(wins);
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}
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static int
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win_property(Window w, Atom a, Atom t, long l, unsigned char **prop)
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{
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Atom real;
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int format;
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unsigned long res, extra;
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int status;
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status = XGetWindowProperty(dpy, w, a, 0L, l, False, t, &real, &format,
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&res, &extra, prop);
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if(status != Success || *prop == 0) {
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return 0;
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}
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if(res == 0) {
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free((void *) *prop);
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}
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return res;
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}
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int
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win_proto(Window w)
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{
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Atom *protocols;
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long res;
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int protos = 0;
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int i;
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res = win_property(w, wm_atom[WMProtocols], XA_ATOM, 20L,
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((unsigned char **) &protocols));
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if(res <= 0) {
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return protos;
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}
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for(i = 0; i < res; i++) {
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if(protocols[i] == wm_atom[WMDelete])
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protos |= WM_PROTOCOL_DELWIN;
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}
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free((char *) protocols);
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return protos;
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}
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/*
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* There's no way to check accesses to destroyed windows, thus
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* those cases are ignored (especially on UnmapNotify's).
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* Other types of errors call Xlib's default error handler, which
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* calls exit().
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*/
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static int
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error_handler(Display *dpy, XErrorEvent *error)
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{
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if(error->error_code == BadWindow
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|| (error->request_code == X_SetInputFocus
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&& error->error_code == BadMatch)
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|| (error->request_code == X_PolyText8
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&& error->error_code == BadDrawable)
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|| (error->request_code == X_PolyFillRectangle
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&& error->error_code == BadDrawable)
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|| (error->request_code == X_PolySegment
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&& error->error_code == BadDrawable)
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|| (error->request_code == X_ConfigureWindow
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&& error->error_code == BadMatch)
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|| (error->request_code == X_GrabKey
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&& error->error_code == BadAccess))
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return 0;
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fprintf(stderr, "gridwm: fatal error: request code=%d, error code=%d\n",
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error->request_code, error->error_code);
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return x_error_handler(dpy, error); /* may call exit() */
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}
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/*
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* Startup Error handler to check if another window manager
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* is already running.
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*/
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static int
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startup_error_handler(Display *dpy, XErrorEvent *error)
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{
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other_wm_running = True;
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return -1;
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}
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static void
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init_lock_keys()
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{
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XModifierKeymap *modmap;
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KeyCode numlock;
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int i;
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static int masks[] = {
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ShiftMask, LockMask, ControlMask, Mod1Mask,
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Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask
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};
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numlock_mask = 0;
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modmap = XGetModifierMapping(dpy);
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numlock = XKeysymToKeycode(dpy, XStringToKeysym("Num_Lock"));
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if(modmap && modmap->max_keypermod > 0) {
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int max = (sizeof(masks) / sizeof(int)) * modmap->max_keypermod;
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for(i = 0; i < max; i++)
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if(numlock && (modmap->modifiermap[i] == numlock))
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numlock_mask = masks[i / modmap->max_keypermod];
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}
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XFreeModifiermap(modmap);
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kmask = 255 & ~(numlock_mask | LockMask);
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}
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static void
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cleanup()
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{
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/*
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Client *c;
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for(c=client; c; c=c->next)
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reparent_client(c, root, c->sel->rect.x, c->sel->rect.y);
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XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
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*/
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}
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int
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main(int argc, char *argv[])
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{
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int i;
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XSetWindowAttributes wa;
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unsigned int mask;
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Window w;
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/* command line args */
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for(i = 1; (i < argc) && (argv[i][0] == '-'); i++) {
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switch (argv[i][1]) {
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case 'v':
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fprintf(stdout, "%s", version);
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exit(0);
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break;
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default:
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usage();
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break;
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}
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}
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dpy = XOpenDisplay(0);
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if(!dpy)
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error("gridwm: cannot connect X server\n");
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screen = DefaultScreen(dpy);
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root = RootWindow(dpy, screen);
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/* check if another WM is already running */
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other_wm_running = False;
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XSetErrorHandler(startup_error_handler);
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/* this causes an error if some other WM is running */
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XSelectInput(dpy, root, SubstructureRedirectMask);
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XSync(dpy, False);
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if(other_wm_running)
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error("gridwm: another window manager is already running\n");
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rect.x = rect.y = 0;
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rect.width = DisplayWidth(dpy, screen);
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rect.height = DisplayHeight(dpy, screen);
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sel_screen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
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XSetErrorHandler(0);
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x_error_handler = XSetErrorHandler(error_handler);
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/* init atoms */
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wm_atom[WMState] = XInternAtom(dpy, "WM_STATE", False);
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wm_atom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
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wm_atom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
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net_atom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
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net_atom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
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XChangeProperty(dpy, root, net_atom[NetSupported], XA_ATOM, 32,
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PropModeReplace, (unsigned char *) net_atom, NetLast);
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/* init cursors */
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cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
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cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
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cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
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init_lock_keys();
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pmap = XCreatePixmap(dpy, root, rect.width, rect.height,
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DefaultDepth(dpy, screen));
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wa.event_mask = SubstructureRedirectMask | EnterWindowMask | LeaveWindowMask;
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wa.cursor = cursor[CurNormal];
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XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
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scan_wins();
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cleanup();
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XCloseDisplay(dpy);
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return 0;
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}
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