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