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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, barwin;
Atom net_atom[NetLast];
Cursor cursor[CurLast];
XRectangle rect, barrect;
Bool running = True;
char *bartext, tag[256];
int screen, sel_screen;
Brush brush = {0};
Client *clients = NULL;
enum { WM_PROTOCOL_DELWIN = 1 };
static Bool other_wm_running;
static char version[] = "gridwm - " VERSION ", (C)opyright MMVI Anselm R. Garbe\n";
static int (*x_error_handler) (Display *, XErrorEvent *);
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(wins[i], &wa);
}
}
if(wins)
XFree(wins);
}
/*
* 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().
*/
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
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;
XEvent ev;
/* 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 */
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);
update_keys();
brush.drawable = XCreatePixmap(dpy, root, rect.width, rect.height,
DefaultDepth(dpy, screen));
brush.gc = XCreateGC(dpy, root, 0, 0);
/* style */
loadcolors(dpy, screen, &brush, BGCOLOR, FGCOLOR, BORDERCOLOR);
loadfont(dpy, &brush.font, FONT);
wa.override_redirect = 1;
wa.background_pixmap = ParentRelative;
wa.event_mask = ExposureMask;
barrect = rect;
barrect.height = labelheight(&brush.font);
barrect.y = rect.height - barrect.height;
barwin = XCreateWindow(dpy, root, barrect.x, barrect.y,
barrect.width, barrect.height, 0, DefaultDepth(dpy, screen),
CopyFromParent, DefaultVisual(dpy, screen),
CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
bartext = NULL;
XDefineCursor(dpy, barwin, cursor[CurNormal]);
XMapRaised(dpy, barwin);
draw_bar();
wa.event_mask = SubstructureRedirectMask | EnterWindowMask \
| LeaveWindowMask;
wa.cursor = cursor[CurNormal];
XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
scan_wins();
while(running) {
XNextEvent(dpy, &ev);
if(handler[ev.type])
(handler[ev.type]) (&ev); /* call handler */
}
cleanup();
XCloseDisplay(dpy);
return 0;
}
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