dwm/main.c

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/* © 2006-2007 Anselm R. Garbe <garbeam at gmail dot com>
* © 2006-2007 Sander van Dijk <a dot h dot vandijk at gmail dot com>
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* See LICENSE file for license details. */
#include "dwm.h"
#include <errno.h>
#include <locale.h>
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/select.h>
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#include <X11/cursorfont.h>
#include <X11/keysym.h>
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#include <X11/Xatom.h>
#include <X11/Xproto.h>
/* extern */
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char stext[256];
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int screen, sx, sy, sw, sh, wax, way, waw, wah;
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unsigned int bh, ntags, numlockmask;
Atom wmatom[WMLast], netatom[NetLast];
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Bool *seltag;
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Bool selscreen = True;
Client *clients = NULL;
Client *sel = NULL;
Client *stack = NULL;
Cursor cursor[CurLast];
Display *dpy;
DC dc = {0};
Window root, barwin;
/* static */
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static int (*xerrorxlib)(Display *, XErrorEvent *);
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static Bool otherwm, readin;
static Bool running = True;
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static void
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cleanup(void) {
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close(STDIN_FILENO);
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while(stack) {
if(stack->isbanned)
XMoveWindow(dpy, stack->win, stack->x, stack->y);
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unmanage(stack);
}
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if(dc.font.set)
XFreeFontSet(dpy, dc.font.set);
else
XFreeFont(dpy, dc.font.xfont);
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XUngrabKey(dpy, AnyKey, AnyModifier, root);
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XFreePixmap(dpy, dc.drawable);
XFreeGC(dpy, dc.gc);
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XDestroyWindow(dpy, barwin);
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XFreeCursor(dpy, cursor[CurNormal]);
XFreeCursor(dpy, cursor[CurResize]);
XFreeCursor(dpy, cursor[CurMove]);
XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
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XSync(dpy, False);
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free(seltag);
}
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static unsigned long
initcolor(const char *colstr) {
Colormap cmap = DefaultColormap(dpy, screen);
XColor color;
if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
eprint("error, cannot allocate color '%s'\n", colstr);
return color.pixel;
}
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static void
initfont(const char *fontstr) {
char *def, **missing;
int i, n;
missing = NULL;
if(dc.font.set)
XFreeFontSet(dpy, dc.font.set);
dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
if(missing) {
while(n--)
fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
XFreeStringList(missing);
}
if(dc.font.set) {
XFontSetExtents *font_extents;
XFontStruct **xfonts;
char **font_names;
dc.font.ascent = dc.font.descent = 0;
font_extents = XExtentsOfFontSet(dc.font.set);
n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
if(dc.font.ascent < (*xfonts)->ascent)
dc.font.ascent = (*xfonts)->ascent;
if(dc.font.descent < (*xfonts)->descent)
dc.font.descent = (*xfonts)->descent;
xfonts++;
}
}
else {
if(dc.font.xfont)
XFreeFont(dpy, dc.font.xfont);
dc.font.xfont = NULL;
if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr)))
eprint("error, cannot load font: '%s'\n", fontstr);
dc.font.ascent = dc.font.xfont->ascent;
dc.font.descent = dc.font.xfont->descent;
}
dc.font.height = dc.font.ascent + dc.font.descent;
}
static void
scan(void) {
unsigned int i, num;
Window *wins, d1, d2;
XWindowAttributes wa;
wins = NULL;
if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
for(i = 0; i < num; i++) {
if(!XGetWindowAttributes(dpy, wins[i], &wa)
|| wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
continue;
if(wa.map_state == IsViewable)
manage(wins[i], &wa);
}
}
if(wins)
XFree(wins);
}
static void
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setup(void) {
int i, j;
unsigned int mask;
Window w;
XModifierKeymap *modmap;
XSetWindowAttributes wa;
/* init atoms */
wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
wmatom[WMState] = XInternAtom(dpy, "WM_STATE", 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);
/* init modifier map */
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numlockmask = 0;
modmap = XGetModifierMapping(dpy);
for (i = 0; i < 8; i++)
for (j = 0; j < modmap->max_keypermod; j++) {
if(modmap->modifiermap[i * modmap->max_keypermod + j]
== XKeysymToKeycode(dpy, XK_Num_Lock))
numlockmask = (1 << i);
}
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XFreeModifiermap(modmap);
/* select for events */
wa.event_mask = SubstructureRedirectMask | SubstructureNotifyMask
| EnterWindowMask | LeaveWindowMask;
wa.cursor = cursor[CurNormal];
XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
grabkeys();
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compileregs();
for(ntags = 0; tags[ntags]; ntags++);
seltag = emallocz(sizeof(Bool) * ntags);
seltag[0] = True;
/* style */
dc.norm[ColBorder] = initcolor(NORMBORDERCOLOR);
dc.norm[ColBG] = initcolor(NORMBGCOLOR);
dc.norm[ColFG] = initcolor(NORMFGCOLOR);
dc.sel[ColBorder] = initcolor(SELBORDERCOLOR);
dc.sel[ColBG] = initcolor(SELBGCOLOR);
dc.sel[ColFG] = initcolor(SELFGCOLOR);
initfont(FONT);
/* geometry */
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sx = sy = 0;
sw = DisplayWidth(dpy, screen);
sh = DisplayHeight(dpy, screen);
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initlayouts();
/* bar */
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dc.h = bh = dc.font.height + 2;
wa.override_redirect = 1;
wa.background_pixmap = ParentRelative;
wa.event_mask = ButtonPressMask | ExposureMask;
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barwin = XCreateWindow(dpy, root, sx, sy + (TOPBAR ? 0 : sh - bh), sw, bh, 0,
DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
XDefineCursor(dpy, barwin, cursor[CurNormal]);
XMapRaised(dpy, barwin);
strcpy(stext, "dwm-"VERSION);
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/* windowarea */
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wax = sx;
way = sy + (TOPBAR ? bh : 0);
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wah = sh - bh;
waw = sw;
/* pixmap for everything */
dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
dc.gc = XCreateGC(dpy, root, 0, 0);
XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
if(!dc.font.set)
XSetFont(dpy, dc.gc, dc.font.xfont->fid);
/* multihead support */
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selscreen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
}
/*
* Startup Error handler to check if another window manager
* is already running.
*/
static int
xerrorstart(Display *dsply, XErrorEvent *ee) {
otherwm = True;
return -1;
}
/* extern */
void
quit(const char *arg) {
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readin = running = False;
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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 may call exit.
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*/
int
xerror(Display *dpy, XErrorEvent *ee) {
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if(ee->error_code == BadWindow
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|| (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)
|| (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
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return 0;
fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
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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[]) {
char *p;
int r, xfd;
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fd_set rd;
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XEvent ev;
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if(argc == 2 && !strncmp("-v", argv[1], 3))
eprint("dwm-"VERSION", © 2004-2007 Anselm R. Garbe, Sander van Dijk\n");
else if(argc != 1)
eprint("usage: dwm [-v]\n");
setlocale(LC_CTYPE, "");
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if(!(dpy = XOpenDisplay(0)))
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eprint("dwm: cannot open display\n");
xfd = ConnectionNumber(dpy);
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screen = DefaultScreen(dpy);
root = RootWindow(dpy, screen);
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otherwm = False;
XSetErrorHandler(xerrorstart);
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/* this causes an error if some other window manager is running */
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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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XSync(dpy, False);
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XSetErrorHandler(NULL);
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xerrorxlib = XSetErrorHandler(xerror);
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XSync(dpy, False);
setup();
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drawstatus();
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scan();
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/* main event loop, also reads status text from stdin */
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XSync(dpy, False);
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readin = True;
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while(running) {
FD_ZERO(&rd);
if(readin)
FD_SET(STDIN_FILENO, &rd);
FD_SET(xfd, &rd);
if(select(xfd + 1, &rd, NULL, NULL, NULL) == -1) {
if(errno == EINTR)
continue;
eprint("select failed\n");
}
if(FD_ISSET(STDIN_FILENO, &rd)) {
switch(r = read(STDIN_FILENO, stext, sizeof stext - 1)) {
case -1:
strncpy(stext, strerror(errno), sizeof stext - 1);
stext[sizeof stext - 1] = '\0';
readin = False;
break;
case 0:
strncpy(stext, "EOF", 4);
readin = False;
break;
default:
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for(stext[r] = '\0', p = stext + strlen(stext) - 1; p >= stext && *p == '\n'; *p-- = '\0');
for(; p >= stext && *p != '\n'; --p);
if(p > stext)
strncpy(stext, p + 1, sizeof stext);
}
drawstatus();
}
while(XPending(dpy)) {
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;
}