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 "dwm.h"
#include <errno.h>
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
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#include <X11/cursorfont.h>
#include <X11/Xatom.h>
#include <X11/Xproto.h>
/* static */
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static Bool otherwm;
static int (*xerrorxlib)(Display *, XErrorEvent *);
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static void
cleanup()
{
while(sel) {
resize(sel, True);
unmanage(sel);
}
XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
}
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static void
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scan()
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{
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;
}
/*
* Startup Error handler to check if another window manager
* is already running.
*/
static int
xerrorstart(Display *dsply, XErrorEvent *ee)
{
otherwm = True;
return -1;
}
/* extern */
char stext[1024];
int tsel = Tdev; /* default tag */
int screen, sx, sy, sw, sh, bx, by, bw, bh, mw;
Atom wmatom[WMLast], netatom[NetLast];
Bool running = True;
Bool issel = True;
Client *clients = NULL;
Client *sel = NULL;
Cursor cursor[CurLast];
Display *dpy;
DC dc = {0};
Window root, barwin;
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int
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getproto(Window w)
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{
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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, wmatom[WMProtocols], XA_ATOM, 20L, &protocols);
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if(res <= 0) {
return protos;
}
for(i = 0; i < res; i++) {
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if(protocols[i] == wmatom[WMDelete])
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protos |= WM_PROTOCOL_DELWIN;
}
free((char *) protocols);
return protos;
}
void
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sendevent(Window w, Atom a, long value)
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{
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);
XSync(dpy, False);
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}
void
quit(Arg *arg)
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{
running = False;
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}
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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 Xlibs
* default error handler, which calls exit().
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*/
int
xerror(Display *dpy, XErrorEvent *ee)
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{
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if(ee->error_code == BadWindow
|| (ee->request_code == X_SetInputFocus
&& ee->error_code == BadMatch)
|| (ee->request_code == X_PolyText8
&& ee->error_code == BadDrawable)
|| (ee->request_code == X_PolyFillRectangle
&& ee->error_code == BadDrawable)
|| (ee->request_code == X_PolySegment
&& ee->error_code == BadDrawable)
|| (ee->request_code == X_ConfigureWindow
&& ee->error_code == BadMatch)
|| (ee->request_code == X_GrabKey
&& ee->error_code == BadAccess))
return 0;
fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
ee->request_code, ee->error_code);
return xerrorxlib(dpy, ee); /* may call exit() */
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}
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int
main(int argc, char *argv[])
{
int i, n;
fd_set rd;
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XSetWindowAttributes wa;
unsigned int mask;
Bool readstdin = True;
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Window w;
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XEvent ev;
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for(i = 1; (i < argc) && (argv[i][0] == '-'); i++) {
switch (argv[i][1]) {
case 'v':
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fprintf(stdout, "%s",
"dwm-"VERSION", (C)opyright MMVI Anselm R. Garbe\n");
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exit(0);
break;
default:
eprint("usage: dwm [-v]\n");
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break;
}
}
dpy = XOpenDisplay(0);
if(!dpy)
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eprint("dwm: cannot connect X server\n");
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screen = DefaultScreen(dpy);
root = RootWindow(dpy, screen);
/* check if another WM is already running */
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otherwm = False;
XSetErrorHandler(xerrorstart);
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/* this causes an error if some other WM is running */
XSelectInput(dpy, root, SubstructureRedirectMask);
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XSync(dpy, False);
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if(otherwm)
eprint("dwm: another window manager is already running\n");
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XSetErrorHandler(NULL);
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xerrorxlib = XSetErrorHandler(xerror);
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/* init atoms */
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wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
PropModeReplace, (unsigned char *) netatom, NetLast);
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/* 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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grabkeys();
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/* style */
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dc.bg = getcolor(BGCOLOR);
dc.fg = getcolor(FGCOLOR);
dc.border = getcolor(BORDERCOLOR);
setfont(FONT);
sx = sy = 0;
sw = DisplayWidth(dpy, screen);
sh = DisplayHeight(dpy, screen);
mw = (sw * MASTERW) / 100;
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wa.override_redirect = 1;
wa.background_pixmap = ParentRelative;
wa.event_mask = ButtonPressMask | ExposureMask;
bx = by = 0;
bw = sw;
dc.h = bh = dc.font.height + 4;
barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
CopyFromParent, DefaultVisual(dpy, screen),
CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
XDefineCursor(dpy, barwin, cursor[CurNormal]);
XMapRaised(dpy, barwin);
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dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
dc.gc = XCreateGC(dpy, root, 0, 0);
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drawstatus();
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issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
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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);
strcpy(stext, "dwm-"VERSION);
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scan();
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/* main event loop, reads status text from stdin as well */
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Mainloop:
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while(running) {
FD_ZERO(&rd);
if(readstdin)
FD_SET(STDIN_FILENO, &rd);
FD_SET(ConnectionNumber(dpy), &rd);
i = select(ConnectionNumber(dpy) + 1, &rd, 0, 0, 0);
if(i == -1 && errno == EINTR)
continue;
if(i < 0)
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eprint("select failed\n");
else if(i > 0) {
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if(FD_ISSET(ConnectionNumber(dpy), &rd)) {
while(XPending(dpy)) {
XNextEvent(dpy, &ev);
if(handler[ev.type])
(handler[ev.type])(&ev); /* call handler */
}
}
if(readstdin && FD_ISSET(STDIN_FILENO, &rd)) {
i = n = 0;
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for(;;) {
if((i = getchar()) == EOF) {
/* broken pipe/end of producer */
readstdin = False;
strcpy(stext, "broken pipe");
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goto Mainloop;
}
if(i == '\n' || n >= sizeof(stext) - 1)
break;
stext[n++] = i;
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}
stext[n] = 0;
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drawstatus();
}
}
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}
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cleanup();
XCloseDisplay(dpy);
return 0;
}