/*
* (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
* See LICENSE file for license details.
*/
#include "dwm.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/select.h>
#include <X11/cursorfont.h>
#include <X11/Xatom.h>
#include <X11/Xproto.h>
/* static */
static int (*xerrorxlib)(Display *, XErrorEvent *);
static Bool otherwm;
static void
cleanup()
{
while(sel) {
resize(sel, True, TopLeft);
unmanage(sel);
}
XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
}
static void
scan()
{
unsigned int i, num;
Window *wins, d1, d2;
XWindowAttributes wa;
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);
}
static int
win_property(Window w, Atom a, Atom t, long l, unsigned char **prop)
{
int status, format;
unsigned long res, extra;
Atom real;
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 = DEFTAG;
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;
int
getproto(Window w)
{
int protos = 0;
int i;
long res;
unsigned char *protocols;
res = win_property(w, wmatom[WMProtocols], XA_ATOM, 20L, &protocols);
if(res <= 0) {
return protos;
}
for(i = 0; i < res; i++) {
if(protocols[i] == wmatom[WMDelete])
protos |= PROTODELWIN;
}
free((char *) protocols);
return protos;
}
void
sendevent(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);
XSync(dpy, False);
}
void
quit(Arg *arg)
{
running = False;
}
/*
* 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().
*/
int
xerror(Display *dpy, XErrorEvent *ee)
{
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() */
}
int
main(int argc, char *argv[])
{
int i;
unsigned int mask;
fd_set rd;
Bool readin = True;
Window w;
XEvent ev;
XSetWindowAttributes wa;
if(argc == 2 && !strncmp("-v", argv[1], 3)) {
fputs("dwm-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
exit(EXIT_SUCCESS);
}
else if(argc != 1)
eprint("usage: dwm [-v]\n");
dpy = XOpenDisplay(0);
if(!dpy)
eprint("dwm: cannot connect X server\n");
screen = DefaultScreen(dpy);
root = RootWindow(dpy, screen);
/* check if another WM is already running */
otherwm = False;
XSetErrorHandler(xerrorstart);
/* this causes an error if some other WM is running */
XSelectInput(dpy, root, SubstructureRedirectMask);
XSync(dpy, False);
if(otherwm)
eprint("dwm: another window manager is already running\n");
XSetErrorHandler(NULL);
xerrorxlib = XSetErrorHandler(xerror);
/* init atoms */
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);
/* init cursors */
cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
grabkeys();
/* style */
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;
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);
dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
dc.gc = XCreateGC(dpy, root, 0, 0);
drawstatus();
issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
wa.event_mask = SubstructureRedirectMask | EnterWindowMask | LeaveWindowMask;
wa.cursor = cursor[CurNormal];
XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
strcpy(stext, "dwm-"VERSION);
scan();
/* main event loop, reads status text from stdin as well */
while(running) {
FD_ZERO(&rd);
if(readin)
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)
eprint("select failed\n");
else if(i > 0) {
if(FD_ISSET(ConnectionNumber(dpy), &rd)) {
while(XPending(dpy)) {
XNextEvent(dpy, &ev);
if(handler[ev.type])
(handler[ev.type])(&ev); /* call handler */
}
}
if(readin && FD_ISSET(STDIN_FILENO, &rd)) {
readin = NULL != fgets(stext, sizeof(stext), stdin);
if(readin)
stext[strlen(stext) - 1] = 0;
else
strcpy(stext, "broken pipe");
drawstatus();
}
}
}
cleanup();
XCloseDisplay(dpy);
return 0;
}