dwm/main.c

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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>
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#include "dwm.h"
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/********** CUSTOMIZE **********/
char *tags[TLast] = {
[Tscratch] = "scratch",
[Tdev] = "dev",
[Tirc] = "irc",
[Twww] = "www",
[Twork] = "work",
};
/********** CUSTOMIZE **********/
/* X structs */
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Display *dpy;
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Window root, barwin;
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Atom wm_atom[WMLast], net_atom[NetLast];
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Cursor cursor[CurLast];
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Bool running = True;
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Bool issel;
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int tsel = Tdev; /* default tag */
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int screen, sx, sy, sw, sh, mw, th;
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DC dc = {0};
Client *clients = NULL;
Client *sel = NULL;
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static Bool other_wm_running;
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static const char version[] =
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"dwm - " VERSION ", (C)opyright MMVI Anselm R. Garbe\n";
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static int (*x_error_handler) (Display *, XErrorEvent *);
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static void
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usage() { error("usage: dwm [-v]\n"); }
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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)
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manage(wins[i], &wa);
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}
}
if(wins)
XFree(wins);
}
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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)
{
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unsigned char *protocols;
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long res;
int protos = 0;
int i;
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res = win_property(w, wm_atom[WMProtocols], XA_ATOM, 20L, &protocols);
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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;
}
void
send_message(Window w, Atom a, long value)
{
XEvent e;
e.type = ClientMessage;
e.xclient.window = w;
e.xclient.message_type = a;
e.xclient.format = 32;
e.xclient.data.l[0] = value;
e.xclient.data.l[1] = CurrentTime;
XSendEvent(dpy, w, False, NoEventMask, &e);
XFlush(dpy);
}
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/*
* 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().
*/
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int
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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;
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fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
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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()
{
while(sel) {
resize(sel);
unmanage(sel);
}
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XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
}
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void
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quit(Arg *arg)
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{
running = False;
}
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int
main(int argc, char *argv[])
{
int i;
XSetWindowAttributes wa;
unsigned int mask;
Window w;
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XEvent ev;
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/* 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)
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error("dwm: cannot connect X server\n");
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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);
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if(other_wm_running)
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error("dwm: another window manager is already running\n");
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sx = sy = 0;
sw = DisplayWidth(dpy, screen);
sh = DisplayHeight(dpy, screen);
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mw = (sw * MASTERW) / 100;
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issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
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XSetErrorHandler(0);
x_error_handler = XSetErrorHandler(error_handler);
/* init atoms */
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wm_atom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
wm_atom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
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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);
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update_keys();
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/* style */
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dc.bg = initcolor(BGCOLOR);
dc.fg = initcolor(FGCOLOR);
dc.border = initcolor(BORDERCOLOR);
initfont(FONT);
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th = dc.font.height + 4;
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dc.drawable = XCreatePixmap(dpy, root, sw, th, DefaultDepth(dpy, screen));
dc.gc = XCreateGC(dpy, root, 0, 0);
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wa.event_mask = SubstructureRedirectMask | EnterWindowMask \
| LeaveWindowMask;
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wa.cursor = cursor[CurNormal];
XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
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scan_wins();
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while(running) {
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XNextEvent(dpy, &ev);
if(handler[ev.type])
(handler[ev.type])(&ev); /* call handler */
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}
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cleanup();
XCloseDisplay(dpy);
return 0;
}