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mydwm/dwm.c
Anselm R Garbe 71365a524f only snap within window area
2008-05-19 13:41:58 +01:00

1743 lines
40 KiB
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/* See LICENSE file for copyright and license details.
*
* dynamic window manager is designed like any other X client as well. It is
* driven through handling X events. In contrast to other X clients, a window
* manager selects for SubstructureRedirectMask on the root window, to receive
* events about window (dis-)appearance. Only one X connection at a time is
* allowed to select for this event mask.
*
* Calls to fetch an X event from the event queue are blocking. Due reading
* status text from standard input, a select()-driven main loop has been
* implemented which selects for reads on the X connection and STDIN_FILENO to
* handle all data smoothly. The event handlers of dwm are organized in an
* array which is accessed whenever a new event has been fetched. This allows
* event dispatching in O(1) time.
*
* Each child of the root window is called a client, except windows which have
* set the override_redirect flag. Clients are organized in a global
* doubly-linked client list, the focus history is remembered through a global
* stack list. Each client contains an array of Bools of the same size as the
* global tags array to indicate the tags of a client.
*
* Keys and tagging rules are organized as arrays and defined in config.h.
*
* To understand everything else, start reading main().
*/
#include <errno.h>
#include <locale.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/select.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <X11/cursorfont.h>
#include <X11/keysym.h>
#include <X11/Xatom.h>
#include <X11/Xlib.h>
#include <X11/Xproto.h>
#include <X11/Xutil.h>
/* macros */
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define BUTTONMASK (ButtonPressMask|ButtonReleaseMask)
#define CLEANMASK(mask) (mask & ~(numlockmask|LockMask))
#define LENGTH(x) (sizeof x / sizeof x[0])
#define MAXTAGLEN 16
#define MOUSEMASK (BUTTONMASK|PointerMotionMask)
/* enums */
enum { BarTop, BarBot, BarOff, BarLast }; /* bar appearance */
enum { CurNormal, CurResize, CurMove, CurLast }; /* cursor */
enum { ColBorder, ColFG, ColBG, ColLast }; /* color */
enum { NetSupported, NetWMName, NetLast }; /* EWMH atoms */
enum { WMProtocols, WMDelete, WMName, WMState, WMLast };/* default atoms */
/* typedefs */
typedef struct Client Client;
struct Client {
char name[256];
int x, y, w, h;
int basew, baseh, incw, inch, maxw, maxh, minw, minh;
int minax, maxax, minay, maxay;
long flags;
unsigned int bw, oldbw;
Bool isbanned, isfixed, isfloating, isurgent;
Bool *tags;
Client *next;
Client *prev;
Client *snext;
Window win;
};
typedef struct {
int x, y, w, h;
unsigned long norm[ColLast];
unsigned long sel[ColLast];
Drawable drawable;
GC gc;
struct {
int ascent;
int descent;
int height;
XFontSet set;
XFontStruct *xfont;
} font;
} DC; /* draw context */
typedef struct {
unsigned long mod;
KeySym keysym;
void (*func)(const char *arg);
const char *arg;
} Key;
typedef struct {
const char *symbol;
void (*arrange)(void);
void (*updategeom)(void);
} Layout;
typedef struct {
const char *class;
const char *instance;
const char *title;
const char *tag;
Bool isfloating;
} Rule;
/* function declarations */
void applyrules(Client *c);
void arrange(void);
void attach(Client *c);
void attachstack(Client *c);
void ban(Client *c);
void buttonpress(XEvent *e);
void checkotherwm(void);
void cleanup(void);
void configure(Client *c);
void configurenotify(XEvent *e);
void configurerequest(XEvent *e);
void destroynotify(XEvent *e);
void detach(Client *c);
void detachstack(Client *c);
void drawbar(void);
void drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]);
void drawtext(const char *text, unsigned long col[ColLast], Bool invert);
void *emallocz(unsigned int size);
void enternotify(XEvent *e);
void eprint(const char *errstr, ...);
void expose(XEvent *e);
void focus(Client *c);
void focusin(XEvent *e);
void focusnext(const char *arg);
void focusprev(const char *arg);
Client *getclient(Window w);
unsigned long getcolor(const char *colstr);
long getstate(Window w);
Bool gettextprop(Window w, Atom atom, char *text, unsigned int size);
void grabbuttons(Client *c, Bool focused);
void grabkeys(void);
unsigned int idxoftag(const char *t);
void initfont(const char *fontstr);
Bool isoccupied(unsigned int t);
Bool isprotodel(Client *c);
Bool isurgent(unsigned int t);
Bool isvisible(Client *c);
void keypress(XEvent *e);
void killclient(const char *arg);
void manage(Window w, XWindowAttributes *wa);
void mappingnotify(XEvent *e);
void maprequest(XEvent *e);
void movemouse(Client *c);
Client *nextunfloating(Client *c);
void propertynotify(XEvent *e);
void quit(const char *arg);
void resize(Client *c, int x, int y, int w, int h, Bool sizehints);
void resizemouse(Client *c);
void restack(void);
void run(void);
void scan(void);
void setclientstate(Client *c, long state);
void setup(void);
void spawn(const char *arg);
void tag(const char *arg);
unsigned int textnw(const char *text, unsigned int len);
unsigned int textw(const char *text);
void togglebar(const char *arg);
void togglefloating(const char *arg);
void togglelayout(const char *arg);
void toggletag(const char *arg);
void toggleview(const char *arg);
void unban(Client *c);
void unmanage(Client *c);
void unmapnotify(XEvent *e);
void updatebar(void);
void updategeom(void);
void updatesizehints(Client *c);
void updatetitle(Client *c);
void updatewmhints(Client *c);
void view(const char *arg);
void viewprevtag(const char *arg);
int xerror(Display *dpy, XErrorEvent *ee);
int xerrordummy(Display *dpy, XErrorEvent *ee);
int xerrorstart(Display *dpy, XErrorEvent *ee);
void zoom(const char *arg);
/* variables */
char stext[256];
int screen, sx, sy, sw, sh;
int bx, by, bw, bh, blw, wx, wy, ww, wh;
int seltags = 0;
int (*xerrorxlib)(Display *, XErrorEvent *);
unsigned int numlockmask = 0;
void (*handler[LASTEvent]) (XEvent *) = {
[ButtonPress] = buttonpress,
[ConfigureRequest] = configurerequest,
[ConfigureNotify] = configurenotify,
[DestroyNotify] = destroynotify,
[EnterNotify] = enternotify,
[Expose] = expose,
[FocusIn] = focusin,
[KeyPress] = keypress,
[MappingNotify] = mappingnotify,
[MapRequest] = maprequest,
[PropertyNotify] = propertynotify,
[UnmapNotify] = unmapnotify
};
Atom wmatom[WMLast], netatom[NetLast];
Bool otherwm, readin;
Bool running = True;
Bool *tagset[2];
Client *clients = NULL;
Client *sel = NULL;
Client *stack = NULL;
Cursor cursor[CurLast];
Display *dpy;
DC dc = {0};
Layout layouts[];
Layout *lt = layouts;
Window root, barwin;
/* configuration, allows nested code to access above variables */
#include "config.h"
#define TAGSZ (LENGTH(tags) * sizeof(Bool))
/* function implementations */
void
applyrules(Client *c) {
unsigned int i;
Bool matched = False;
Rule *r;
XClassHint ch = { 0 };
/* rule matching */
XGetClassHint(dpy, c->win, &ch);
for(i = 0; i < LENGTH(rules); i++) {
r = &rules[i];
if((!r->title || strstr(c->name, r->title))
&& (!r->class || (ch.res_class && strstr(ch.res_class, r->class)))
&& (!r->instance || (ch.res_name && strstr(ch.res_name, r->instance)))) {
c->isfloating = r->isfloating;
if(r->tag) {
c->tags[idxoftag(r->tag)] = True;
matched = True;
}
}
}
if(ch.res_class)
XFree(ch.res_class);
if(ch.res_name)
XFree(ch.res_name);
if(!matched)
memcpy(c->tags, tagset[seltags], TAGSZ);
}
void
arrange(void) {
Client *c;
for(c = clients; c; c = c->next)
if(isvisible(c)) {
unban(c);
if(!lt->arrange || c->isfloating)
resize(c, c->x, c->y, c->w, c->h, True);
}
else
ban(c);
focus(NULL);
if(lt->arrange)
lt->arrange();
restack();
}
void
attach(Client *c) {
if(clients)
clients->prev = c;
c->next = clients;
clients = c;
}
void
attachstack(Client *c) {
c->snext = stack;
stack = c;
}
void
ban(Client *c) {
if(c->isbanned)
return;
XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
c->isbanned = True;
}
void
buttonpress(XEvent *e) {
unsigned int i, x;
Client *c;
XButtonPressedEvent *ev = &e->xbutton;
if(ev->window == barwin) {
x = 0;
for(i = 0; i < LENGTH(tags); i++) {
x += textw(tags[i]);
if(ev->x < x) {
if(ev->button == Button1) {
if(ev->state & MODKEY)
tag(tags[i]);
else
view(tags[i]);
}
else if(ev->button == Button3) {
if(ev->state & MODKEY)
toggletag(tags[i]);
else
toggleview(tags[i]);
}
return;
}
}
if((ev->x < x + blw) && ev->button == Button1)
togglelayout(NULL);
}
else if((c = getclient(ev->window))) {
focus(c);
if(CLEANMASK(ev->state) != MODKEY)
return;
if(ev->button == Button1) {
restack();
movemouse(c);
}
else if(ev->button == Button2) {
if(lt->arrange && c->isfloating)
togglefloating(NULL);
}
else if(ev->button == Button3 && !c->isfixed) {
restack();
resizemouse(c);
}
}
}
void
checkotherwm(void) {
otherwm = False;
XSetErrorHandler(xerrorstart);
/* this causes an error if some other window manager is running */
XSelectInput(dpy, DefaultRootWindow(dpy), SubstructureRedirectMask);
XSync(dpy, False);
if(otherwm)
eprint("dwm: another window manager is already running\n");
XSync(dpy, False);
XSetErrorHandler(NULL);
xerrorxlib = XSetErrorHandler(xerror);
XSync(dpy, False);
}
void
cleanup(void) {
close(STDIN_FILENO);
while(stack) {
unban(stack);
unmanage(stack);
}
if(dc.font.set)
XFreeFontSet(dpy, dc.font.set);
else
XFreeFont(dpy, dc.font.xfont);
XUngrabKey(dpy, AnyKey, AnyModifier, root);
XFreePixmap(dpy, dc.drawable);
XFreeGC(dpy, dc.gc);
XFreeCursor(dpy, cursor[CurNormal]);
XFreeCursor(dpy, cursor[CurResize]);
XFreeCursor(dpy, cursor[CurMove]);
XDestroyWindow(dpy, barwin);
XSync(dpy, False);
XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
}
void
configure(Client *c) {
XConfigureEvent ce;
ce.type = ConfigureNotify;
ce.display = dpy;
ce.event = c->win;
ce.window = c->win;
ce.x = c->x;
ce.y = c->y;
ce.width = c->w;
ce.height = c->h;
ce.border_width = c->bw;
ce.above = None;
ce.override_redirect = False;
XSendEvent(dpy, c->win, False, StructureNotifyMask, (XEvent *)&ce);
}
void
configurenotify(XEvent *e) {
XConfigureEvent *ev = &e->xconfigure;
if(ev->window == root && (ev->width != sw || ev->height != sh)) {
sw = ev->width;
sh = ev->height;
updategeom();
updatebar();
arrange();
}
}
void
configurerequest(XEvent *e) {
Client *c;
XConfigureRequestEvent *ev = &e->xconfigurerequest;
XWindowChanges wc;
if((c = getclient(ev->window))) {
if(ev->value_mask & CWBorderWidth)
c->bw = ev->border_width;
if(c->isfixed || c->isfloating || !lt->arrange) {
if(ev->value_mask & CWX)
c->x = sx + ev->x;
if(ev->value_mask & CWY)
c->y = sy + ev->y;
if(ev->value_mask & CWWidth)
c->w = ev->width;
if(ev->value_mask & CWHeight)
c->h = ev->height;
if((c->x - sx + c->w) > sw && c->isfloating)
c->x = sx + (sw / 2 - c->w / 2); /* center in x direction */
if((c->y - sy + c->h) > sh && c->isfloating)
c->y = sy + (sh / 2 - c->h / 2); /* center in y direction */
if((ev->value_mask & (CWX|CWY))
&& !(ev->value_mask & (CWWidth|CWHeight)))
configure(c);
if(isvisible(c))
XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
}
else
configure(c);
}
else {
wc.x = ev->x;
wc.y = ev->y;
wc.width = ev->width;
wc.height = ev->height;
wc.border_width = ev->border_width;
wc.sibling = ev->above;
wc.stack_mode = ev->detail;
XConfigureWindow(dpy, ev->window, ev->value_mask, &wc);
}
XSync(dpy, False);
}
void
destroynotify(XEvent *e) {
Client *c;
XDestroyWindowEvent *ev = &e->xdestroywindow;
if((c = getclient(ev->window)))
unmanage(c);
}
void
detach(Client *c) {
if(c->prev)
c->prev->next = c->next;
if(c->next)
c->next->prev = c->prev;
if(c == clients)
clients = c->next;
c->next = c->prev = NULL;
}
void
detachstack(Client *c) {
Client **tc;
for(tc = &stack; *tc && *tc != c; tc = &(*tc)->snext);
*tc = c->snext;
}
void
drawbar(void) {
int i, x;
Client *c;
dc.x = 0;
for(c = stack; c && !isvisible(c); c = c->snext);
for(i = 0; i < LENGTH(tags); i++) {
dc.w = textw(tags[i]);
if(tagset[seltags][i]) {
drawtext(tags[i], dc.sel, isurgent(i));
drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.sel);
}
else {
drawtext(tags[i], dc.norm, isurgent(i));
drawsquare(c && c->tags[i], isoccupied(i), isurgent(i), dc.norm);
}
dc.x += dc.w;
}
if(blw > 0) {
dc.w = blw;
drawtext(lt->symbol, dc.norm, False);
x = dc.x + dc.w;
}
else
x = dc.x;
dc.w = textw(stext);
dc.x = bw - dc.w;
if(dc.x < x) {
dc.x = x;
dc.w = bw - x;
}
drawtext(stext, dc.norm, False);
if((dc.w = dc.x - x) > bh) {
dc.x = x;
if(c) {
drawtext(c->name, dc.sel, False);
drawsquare(False, c->isfloating, False, dc.sel);
}
else
drawtext(NULL, dc.norm, False);
}
XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, bw, bh, 0, 0);
XSync(dpy, False);
}
void
drawsquare(Bool filled, Bool empty, Bool invert, unsigned long col[ColLast]) {
int x;
XGCValues gcv;
XRectangle r = { dc.x, dc.y, dc.w, dc.h };
gcv.foreground = col[invert ? ColBG : ColFG];
XChangeGC(dpy, dc.gc, GCForeground, &gcv);
x = (dc.font.ascent + dc.font.descent + 2) / 4;
r.x = dc.x + 1;
r.y = dc.y + 1;
if(filled) {
r.width = r.height = x + 1;
XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
}
else if(empty) {
r.width = r.height = x;
XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
}
}
void
drawtext(const char *text, unsigned long col[ColLast], Bool invert) {
int x, y, w, h;
unsigned int len, olen;
XRectangle r = { dc.x, dc.y, dc.w, dc.h };
char buf[256];
XSetForeground(dpy, dc.gc, col[invert ? ColFG : ColBG]);
XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
if(!text)
return;
olen = strlen(text);
len = MIN(olen, sizeof buf);
memcpy(buf, text, len);
w = 0;
h = dc.font.ascent + dc.font.descent;
y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
x = dc.x + (h / 2);
/* shorten text if necessary */
for(; len && (w = textnw(buf, len)) > dc.w - h; len--);
if(!len)
return;
if(len < olen) {
if(len > 1)
buf[len - 1] = '.';
if(len > 2)
buf[len - 2] = '.';
if(len > 3)
buf[len - 3] = '.';
}
XSetForeground(dpy, dc.gc, col[invert ? ColBG : ColFG]);
if(dc.font.set)
XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
else
XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
}
void *
emallocz(unsigned int size) {
void *res = calloc(1, size);
if(!res)
eprint("fatal: could not malloc() %u bytes\n", size);
return res;
}
void
enternotify(XEvent *e) {
Client *c;
XCrossingEvent *ev = &e->xcrossing;
if((ev->mode != NotifyNormal || ev->detail == NotifyInferior) && ev->window != root)
return;
if((c = getclient(ev->window)))
focus(c);
else
focus(NULL);
}
void
eprint(const char *errstr, ...) {
va_list ap;
va_start(ap, errstr);
vfprintf(stderr, errstr, ap);
va_end(ap);
exit(EXIT_FAILURE);
}
void
expose(XEvent *e) {
XExposeEvent *ev = &e->xexpose;
if(ev->count == 0 && (ev->window == barwin))
drawbar();
}
void
focus(Client *c) {
if(!c || (c && !isvisible(c)))
for(c = stack; c && !isvisible(c); c = c->snext);
if(sel && sel != c) {
grabbuttons(sel, False);
XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
}
if(c) {
detachstack(c);
attachstack(c);
grabbuttons(c, True);
}
sel = c;
if(c) {
XSetWindowBorder(dpy, c->win, dc.sel[ColBorder]);
XSetInputFocus(dpy, c->win, RevertToPointerRoot, CurrentTime);
}
else
XSetInputFocus(dpy, root, RevertToPointerRoot, CurrentTime);
drawbar();
}
void
focusin(XEvent *e) { /* there are some broken focus acquiring clients */
XFocusChangeEvent *ev = &e->xfocus;
if(sel && ev->window != sel->win)
XSetInputFocus(dpy, sel->win, RevertToPointerRoot, CurrentTime);
}
void
focusnext(const char *arg) {
Client *c;
if(!sel)
return;
for(c = sel->next; c && !isvisible(c); c = c->next);
if(!c)
for(c = clients; c && !isvisible(c); c = c->next);
if(c) {
focus(c);
restack();
}
}
void
focusprev(const char *arg) {
Client *c;
if(!sel)
return;
for(c = sel->prev; c && !isvisible(c); c = c->prev);
if(!c) {
for(c = clients; c && c->next; c = c->next);
for(; c && !isvisible(c); c = c->prev);
}
if(c) {
focus(c);
restack();
}
}
Client *
getclient(Window w) {
Client *c;
for(c = clients; c && c->win != w; c = c->next);
return c;
}
unsigned long
getcolor(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;
}
long
getstate(Window w) {
int format, status;
long result = -1;
unsigned char *p = NULL;
unsigned long n, extra;
Atom real;
status = XGetWindowProperty(dpy, w, wmatom[WMState], 0L, 2L, False, wmatom[WMState],
&real, &format, &n, &extra, (unsigned char **)&p);
if(status != Success)
return -1;
if(n != 0)
result = *p;
XFree(p);
return result;
}
Bool
gettextprop(Window w, Atom atom, char *text, unsigned int size) {
char **list = NULL;
int n;
XTextProperty name;
if(!text || size == 0)
return False;
text[0] = '\0';
XGetTextProperty(dpy, w, &name, atom);
if(!name.nitems)
return False;
if(name.encoding == XA_STRING)
strncpy(text, (char *)name.value, size - 1);
else {
if(XmbTextPropertyToTextList(dpy, &name, &list, &n) >= Success
&& n > 0 && *list) {
strncpy(text, *list, size - 1);
XFreeStringList(list);
}
}
text[size - 1] = '\0';
XFree(name.value);
return True;
}
void
grabbuttons(Client *c, Bool focused) {
int i, j;
unsigned int buttons[] = { Button1, Button2, Button3 };
unsigned int modifiers[] = { MODKEY, MODKEY|LockMask, MODKEY|numlockmask,
MODKEY|numlockmask|LockMask} ;
XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
if(focused)
for(i = 0; i < LENGTH(buttons); i++)
for(j = 0; j < LENGTH(modifiers); j++)
XGrabButton(dpy, buttons[i], modifiers[j], c->win, False,
BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
else
XGrabButton(dpy, AnyButton, AnyModifier, c->win, False,
BUTTONMASK, GrabModeAsync, GrabModeSync, None, None);
}
void
grabkeys(void) {
unsigned int i, j;
KeyCode code;
XModifierKeymap *modmap;
/* init modifier map */
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);
}
XFreeModifiermap(modmap);
XUngrabKey(dpy, AnyKey, AnyModifier, root);
for(i = 0; i < LENGTH(keys); i++) {
code = XKeysymToKeycode(dpy, keys[i].keysym);
XGrabKey(dpy, code, keys[i].mod, root, True,
GrabModeAsync, GrabModeAsync);
XGrabKey(dpy, code, keys[i].mod|LockMask, root, True,
GrabModeAsync, GrabModeAsync);
XGrabKey(dpy, code, keys[i].mod|numlockmask, root, True,
GrabModeAsync, GrabModeAsync);
XGrabKey(dpy, code, keys[i].mod|numlockmask|LockMask, root, True,
GrabModeAsync, GrabModeAsync);
}
}
unsigned int
idxoftag(const char *t) {
unsigned int i;
for(i = 0; (i < LENGTH(tags)) && t && strcmp(tags[i], t); i++);
return (i < LENGTH(tags)) ? i : 0;
}
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++) {
dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
dc.font.descent = MAX(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))
&& !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
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;
}
Bool
isoccupied(unsigned int t) {
Client *c;
for(c = clients; c; c = c->next)
if(c->tags[t])
return True;
return False;
}
Bool
isprotodel(Client *c) {
int i, n;
Atom *protocols;
Bool ret = False;
if(XGetWMProtocols(dpy, c->win, &protocols, &n)) {
for(i = 0; !ret && i < n; i++)
if(protocols[i] == wmatom[WMDelete])
ret = True;
XFree(protocols);
}
return ret;
}
Bool
isurgent(unsigned int t) {
Client *c;
for(c = clients; c; c = c->next)
if(c->isurgent && c->tags[t])
return True;
return False;
}
Bool
isvisible(Client *c) {
unsigned int i;
for(i = 0; i < LENGTH(tags); i++)
if(c->tags[i] && tagset[seltags][i])
return True;
return False;
}
void
keypress(XEvent *e) {
unsigned int i;
KeySym keysym;
XKeyEvent *ev;
ev = &e->xkey;
keysym = XKeycodeToKeysym(dpy, (KeyCode)ev->keycode, 0);
for(i = 0; i < LENGTH(keys); i++)
if(keysym == keys[i].keysym
&& CLEANMASK(keys[i].mod) == CLEANMASK(ev->state))
{
if(keys[i].func)
keys[i].func(keys[i].arg);
}
}
void
killclient(const char *arg) {
XEvent ev;
if(!sel)
return;
if(isprotodel(sel)) {
ev.type = ClientMessage;
ev.xclient.window = sel->win;
ev.xclient.message_type = wmatom[WMProtocols];
ev.xclient.format = 32;
ev.xclient.data.l[0] = wmatom[WMDelete];
ev.xclient.data.l[1] = CurrentTime;
XSendEvent(dpy, sel->win, False, NoEventMask, &ev);
}
else
XKillClient(dpy, sel->win);
}
void
manage(Window w, XWindowAttributes *wa) {
Client *c, *t = NULL;
Status rettrans;
Window trans;
XWindowChanges wc;
c = emallocz(sizeof(Client));
c->tags = emallocz(TAGSZ);
c->win = w;
/* geometry */
c->x = wa->x;
c->y = wa->y;
c->w = wa->width;
c->h = wa->height;
c->oldbw = wa->border_width;
if(c->w == sw && c->h == sh) {
c->x = sx;
c->y = sy;
c->bw = wa->border_width;
}
else {
if(c->x + c->w + 2 * c->bw > wx + ww)
c->x = wx + ww - c->w - 2 * c->bw;
if(c->y + c->h + 2 * c->bw > wy + wh)
c->y = wy + wh - c->h - 2 * c->bw;
c->x = MAX(c->x, wx);
c->y = MAX(c->y, wy);
c->bw = borderpx;
}
wc.border_width = c->bw;
XConfigureWindow(dpy, w, CWBorderWidth, &wc);
XSetWindowBorder(dpy, w, dc.norm[ColBorder]);
configure(c); /* propagates border_width, if size doesn't change */
updatesizehints(c);
XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
grabbuttons(c, False);
updatetitle(c);
if((rettrans = XGetTransientForHint(dpy, w, &trans) == Success))
for(t = clients; t && t->win != trans; t = t->next);
if(t)
memcpy(c->tags, t->tags, TAGSZ);
else
applyrules(c);
if(!c->isfloating)
c->isfloating = (rettrans == Success) || c->isfixed;
attach(c);
attachstack(c);
XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h); /* some windows require this */
ban(c);
XMapWindow(dpy, c->win);
setclientstate(c, NormalState);
arrange();
}
void
mappingnotify(XEvent *e) {
XMappingEvent *ev = &e->xmapping;
XRefreshKeyboardMapping(ev);
if(ev->request == MappingKeyboard)
grabkeys();
}
void
maprequest(XEvent *e) {
static XWindowAttributes wa;
XMapRequestEvent *ev = &e->xmaprequest;
if(!XGetWindowAttributes(dpy, ev->window, &wa))
return;
if(wa.override_redirect)
return;
if(!getclient(ev->window))
manage(ev->window, &wa);
}
void
movemouse(Client *c) {
int x1, y1, ocx, ocy, di, nx, ny;
unsigned int dui;
Window dummy;
XEvent ev;
ocx = nx = c->x;
ocy = ny = c->y;
if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
None, cursor[CurMove], CurrentTime) != GrabSuccess)
return;
XQueryPointer(dpy, root, &dummy, &dummy, &x1, &y1, &di, &di, &dui);
for(;;) {
XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
switch (ev.type) {
case ButtonRelease:
XUngrabPointer(dpy, CurrentTime);
return;
case ConfigureRequest:
case Expose:
case MapRequest:
handler[ev.type](&ev);
break;
case MotionNotify:
XSync(dpy, False);
nx = ocx + (ev.xmotion.x - x1);
ny = ocy + (ev.xmotion.y - y1);
if(snap && nx >= wx && nx <= wx + ww
&& ny >= wy && ny <= wy + wh) {
if(abs(wx - nx) < snap)
nx = wx;
else if(abs((wx + ww) - (nx + c->w + 2 * c->bw)) < snap)
nx = wx + ww - c->w - 2 * c->bw;
if(abs(wy - ny) < snap)
ny = wy;
else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < snap)
ny = wy + wh - c->h - 2 * c->bw;
if(!c->isfloating && lt->arrange && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
togglefloating(NULL);
}
if(!lt->arrange || c->isfloating)
resize(c, nx, ny, c->w, c->h, False);
break;
}
}
}
Client *
nextunfloating(Client *c) {
for(; c && (c->isfloating || !isvisible(c)); c = c->next);
return c;
}
void
propertynotify(XEvent *e) {
Client *c;
Window trans;
XPropertyEvent *ev = &e->xproperty;
if(ev->state == PropertyDelete)
return; /* ignore */
if((c = getclient(ev->window))) {
switch (ev->atom) {
default: break;
case XA_WM_TRANSIENT_FOR:
XGetTransientForHint(dpy, c->win, &trans);
if(!c->isfloating && (c->isfloating = (getclient(trans) != NULL)))
arrange();
break;
case XA_WM_NORMAL_HINTS:
updatesizehints(c);
break;
case XA_WM_HINTS:
updatewmhints(c);
drawbar();
break;
}
if(ev->atom == XA_WM_NAME || ev->atom == netatom[NetWMName]) {
updatetitle(c);
if(c == sel)
drawbar();
}
}
}
void
quit(const char *arg) {
readin = running = False;
}
void
resize(Client *c, int x, int y, int w, int h, Bool sizehints) {
XWindowChanges wc;
if(sizehints) {
/* set minimum possible */
w = MAX(1, w);
h = MAX(1, h);
/* temporarily remove base dimensions */
w -= c->basew;
h -= c->baseh;
/* adjust for aspect limits */
if(c->minax != c->maxax && c->minay != c->maxay
&& c->minax > 0 && c->maxax > 0 && c->minay > 0 && c->maxay > 0) {
if(w * c->maxay > h * c->maxax)
w = h * c->maxax / c->maxay;
else if(w * c->minay < h * c->minax)
h = w * c->minay / c->minax;
}
/* adjust for increment value */
if(c->incw)
w -= w % c->incw;
if(c->inch)
h -= h % c->inch;
/* restore base dimensions */
w += c->basew;
h += c->baseh;
w = MAX(w, c->minw);
h = MAX(h, c->minh);
if (c->maxw)
w = MIN(w, c->maxw);
if (c->maxh)
h = MIN(h, c->maxh);
}
if(w <= 0 || h <= 0)
return;
if(x > sx + sw)
x = sw - w - 2 * c->bw;
if(y > sy + sh)
y = sh - h - 2 * c->bw;
if(x + w + 2 * c->bw < sx)
x = sx;
if(y + h + 2 * c->bw < sy)
y = sy;
if(c->x != x || c->y != y || c->w != w || c->h != h) {
c->x = wc.x = x;
c->y = wc.y = y;
c->w = wc.width = w;
c->h = wc.height = h;
wc.border_width = c->bw;
XConfigureWindow(dpy, c->win,
CWX|CWY|CWWidth|CWHeight|CWBorderWidth, &wc);
configure(c);
XSync(dpy, False);
}
}
void
resizemouse(Client *c) {
int ocx, ocy;
int nw, nh;
XEvent ev;
ocx = c->x;
ocy = c->y;
if(XGrabPointer(dpy, root, False, MOUSEMASK, GrabModeAsync, GrabModeAsync,
None, cursor[CurResize], CurrentTime) != GrabSuccess)
return;
XWarpPointer(dpy, None, c->win, 0, 0, 0, 0, c->w + c->bw - 1, c->h + c->bw - 1);
for(;;) {
XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask , &ev);
switch(ev.type) {
case ButtonRelease:
XWarpPointer(dpy, None, c->win, 0, 0, 0, 0,
c->w + c->bw - 1, c->h + c->bw - 1);
XUngrabPointer(dpy, CurrentTime);
while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
return;
case ConfigureRequest:
case Expose:
case MapRequest:
handler[ev.type](&ev);
break;
case MotionNotify:
XSync(dpy, False);
nw = MAX(ev.xmotion.x - ocx - 2 * c->bw + 1, 1);
nh = MAX(ev.xmotion.y - ocy - 2 * c->bw + 1, 1);
if(snap && nw >= wx && nw <= wx + ww
&& nh >= wy && nh <= wy + wh) {
if(!c->isfloating && lt->arrange
&& (abs(nw - c->w) > snap || abs(nh - c->h) > snap))
togglefloating(NULL);
}
if(!lt->arrange || c->isfloating)
resize(c, c->x, c->y, nw, nh, True);
break;
}
}
}
void
restack(void) {
Client *c;
XEvent ev;
XWindowChanges wc;
drawbar();
if(!sel)
return;
if(sel->isfloating || !lt->arrange)
XRaiseWindow(dpy, sel->win);
if(lt->arrange) {
wc.stack_mode = Below;
wc.sibling = barwin;
for(c = stack; c; c = c->snext)
if(!c->isfloating && isvisible(c)) {
XConfigureWindow(dpy, c->win, CWSibling|CWStackMode, &wc);
wc.sibling = c->win;
}
}
XSync(dpy, False);
while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
}
void
run(void) {
char *p;
char sbuf[sizeof stext];
fd_set rd;
int r, xfd;
unsigned int len, offset;
XEvent ev;
/* main event loop, also reads status text from stdin */
XSync(dpy, False);
xfd = ConnectionNumber(dpy);
readin = True;
offset = 0;
len = sizeof stext - 1;
sbuf[len] = stext[len] = '\0'; /* 0-terminator is never touched */
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, sbuf + offset, len - offset))) {
case -1:
strncpy(stext, strerror(errno), len);
readin = False;
break;
case 0:
strncpy(stext, "EOF", 4);
readin = False;
break;
default:
for(p = sbuf + offset; r > 0; p++, r--, offset++)
if(*p == '\n' || *p == '\0') {
*p = '\0';
strncpy(stext, sbuf, len);
p += r - 1; /* p is sbuf + offset + r - 1 */
for(r = 0; *(p - r) && *(p - r) != '\n'; r++);
offset = r;
if(r)
memmove(sbuf, p - r + 1, r);
break;
}
break;
}
drawbar();
}
while(XPending(dpy)) {
XNextEvent(dpy, &ev);
if(handler[ev.type])
(handler[ev.type])(&ev); /* call handler */
}
}
}
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 || getstate(wins[i]) == IconicState)
manage(wins[i], &wa);
}
for(i = 0; i < num; i++) { /* now the transients */
if(!XGetWindowAttributes(dpy, wins[i], &wa))
continue;
if(XGetTransientForHint(dpy, wins[i], &d1)
&& (wa.map_state == IsViewable || getstate(wins[i]) == IconicState))
manage(wins[i], &wa);
}
}
if(wins)
XFree(wins);
}
void
setclientstate(Client *c, long state) {
long data[] = {state, None};
XChangeProperty(dpy, c->win, wmatom[WMState], wmatom[WMState], 32,
PropModeReplace, (unsigned char *)data, 2);
}
void
setup(void) {
unsigned int i, w;
XSetWindowAttributes wa;
/* init screen */
screen = DefaultScreen(dpy);
root = RootWindow(dpy, screen);
initfont(FONT);
sx = 0;
sy = 0;
sw = DisplayWidth(dpy, screen);
sh = DisplayHeight(dpy, screen);
bh = dc.font.height + 2;
updategeom();
/* init atoms */
wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
wmatom[WMName] = XInternAtom(dpy, "WM_NAME", False);
wmatom[WMState] = XInternAtom(dpy, "WM_STATE", False);
netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
/* init cursors */
wa.cursor = cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
/* init appearance */
dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
dc.norm[ColBG] = getcolor(NORMBGCOLOR);
dc.norm[ColFG] = getcolor(NORMFGCOLOR);
dc.sel[ColBorder] = getcolor(SELBORDERCOLOR);
dc.sel[ColBG] = getcolor(SELBGCOLOR);
dc.sel[ColFG] = getcolor(SELFGCOLOR);
initfont(FONT);
dc.h = bh;
dc.drawable = XCreatePixmap(dpy, root, DisplayWidth(dpy, screen), 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);
/* init tags */
tagset[0] = emallocz(TAGSZ);
tagset[1] = emallocz(TAGSZ);
tagset[0][0] = tagset[1][0] = True;
/* init bar */
for(blw = i = 0; LENGTH(layouts) > 1 && i < LENGTH(layouts); i++) {
w = textw(layouts[i].symbol);
blw = MAX(blw, w);
}
wa.override_redirect = 1;
wa.background_pixmap = ParentRelative;
wa.event_mask = ButtonPressMask|ExposureMask;
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);
strcpy(stext, "dwm-"VERSION);
drawbar();
/* EWMH support per view */
XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
PropModeReplace, (unsigned char *) netatom, NetLast);
/* select for events */
wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask
|EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
XSelectInput(dpy, root, wa.event_mask);
/* grab keys */
grabkeys();
}
void
spawn(const char *arg) {
static char *shell = NULL;
if(!shell && !(shell = getenv("SHELL")))
shell = "/bin/sh";
if(!arg)
return;
/* The double-fork construct avoids zombie processes and keeps the code
* clean from stupid signal handlers. */
if(fork() == 0) {
if(fork() == 0) {
if(dpy)
close(ConnectionNumber(dpy));
setsid();
execl(shell, shell, "-c", arg, (char *)NULL);
fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg);
perror(" failed");
}
exit(0);
}
wait(0);
}
void
tag(const char *arg) {
unsigned int i;
if(!sel)
return;
for(i = 0; i < LENGTH(tags); i++)
sel->tags[i] = (arg == NULL);
sel->tags[idxoftag(arg)] = True;
arrange();
}
unsigned int
textnw(const char *text, unsigned int len) {
XRectangle r;
if(dc.font.set) {
XmbTextExtents(dc.font.set, text, len, NULL, &r);
return r.width;
}
return XTextWidth(dc.font.xfont, text, len);
}
unsigned int
textw(const char *text) {
return textnw(text, strlen(text)) + dc.font.height;
}
void
togglebar(const char *arg) {
showbar = !showbar;
updategeom();
updatebar();
arrange();
}
void
togglefloating(const char *arg) {
if(!sel)
return;
sel->isfloating = !sel->isfloating;
if(sel->isfloating)
resize(sel, sel->x, sel->y, sel->w, sel->h, True);
arrange();
}
void
togglelayout(const char *arg) {
unsigned int i;
if(!arg) {
if(++lt == &layouts[LENGTH(layouts)])
lt = &layouts[0];
}
else {
for(i = 0; i < LENGTH(layouts); i++)
if(!strcmp(arg, layouts[i].symbol))
break;
if(i == LENGTH(layouts))
return;
lt = &layouts[i];
}
if(sel)
arrange();
else
drawbar();
}
void
toggletag(const char *arg) {
unsigned int i, j;
if(!sel)
return;
i = idxoftag(arg);
sel->tags[i] = !sel->tags[i];
for(j = 0; j < LENGTH(tags) && !sel->tags[j]; j++);
if(j == LENGTH(tags))
sel->tags[i] = True; /* at least one tag must be enabled */
arrange();
}
void
toggleview(const char *arg) {
unsigned int i, j;
i = idxoftag(arg);
tagset[seltags][i] = !tagset[seltags][i];
for(j = 0; j < LENGTH(tags) && !tagset[seltags][j]; j++);
if(j == LENGTH(tags))
tagset[seltags][i] = True; /* at least one tag must be viewed */
arrange();
}
void
unban(Client *c) {
if(!c->isbanned)
return;
XMoveWindow(dpy, c->win, c->x, c->y);
c->isbanned = False;
}
void
unmanage(Client *c) {
XWindowChanges wc;
wc.border_width = c->oldbw;
/* The server grab construct avoids race conditions. */
XGrabServer(dpy);
XSetErrorHandler(xerrordummy);
XConfigureWindow(dpy, c->win, CWBorderWidth, &wc); /* restore border */
detach(c);
detachstack(c);
if(sel == c)
focus(NULL);
XUngrabButton(dpy, AnyButton, AnyModifier, c->win);
setclientstate(c, WithdrawnState);
free(c->tags);
free(c);
XSync(dpy, False);
XSetErrorHandler(xerror);
XUngrabServer(dpy);
arrange();
}
void
unmapnotify(XEvent *e) {
Client *c;
XUnmapEvent *ev = &e->xunmap;
if((c = getclient(ev->window)))
unmanage(c);
}
void
updatebar(void) {
if(dc.drawable != 0)
XFreePixmap(dpy, dc.drawable);
dc.drawable = XCreatePixmap(dpy, root, bw, bh, DefaultDepth(dpy, screen));
XMoveResizeWindow(dpy, barwin, bx, by, bw, bh);
}
void
updategeom(void) {
unsigned int i;
#ifdef CUSTOMGEOM /* define your own if you are Xinerama user */
CUSTOMGEOM
#else
/* bar geometry*/
bx = 0;
by = showbar ? (topbar ? 0 : sh - bh) : -bh;
bw = sw;
/* window area geometry */
wx = sx;
wy = showbar && topbar ? sy + bh : sy;
ww = sw;
wh = showbar ? sh - bh : sh;
#endif
/* update layout geometries */
for(i = 0; i < LENGTH(layouts); i++)
if(layouts[i].updategeom)
layouts[i].updategeom();
}
void
updatesizehints(Client *c) {
long msize;
XSizeHints size;
if(!XGetWMNormalHints(dpy, c->win, &size, &msize) || !size.flags)
size.flags = PSize;
c->flags = size.flags;
if(c->flags & PBaseSize) {
c->basew = size.base_width;
c->baseh = size.base_height;
}
else if(c->flags & PMinSize) {
c->basew = size.min_width;
c->baseh = size.min_height;
}
else
c->basew = c->baseh = 0;
if(c->flags & PResizeInc) {
c->incw = size.width_inc;
c->inch = size.height_inc;
}
else
c->incw = c->inch = 0;
if(c->flags & PMaxSize) {
c->maxw = size.max_width;
c->maxh = size.max_height;
}
else
c->maxw = c->maxh = 0;
if(c->flags & PMinSize) {
c->minw = size.min_width;
c->minh = size.min_height;
}
else if(c->flags & PBaseSize) {
c->minw = size.base_width;
c->minh = size.base_height;
}
else
c->minw = c->minh = 0;
if(c->flags & PAspect) {
c->minax = size.min_aspect.x;
c->maxax = size.max_aspect.x;
c->minay = size.min_aspect.y;
c->maxay = size.max_aspect.y;
}
else
c->minax = c->maxax = c->minay = c->maxay = 0;
c->isfixed = (c->maxw && c->minw && c->maxh && c->minh
&& c->maxw == c->minw && c->maxh == c->minh);
}
void
updatetitle(Client *c) {
if(!gettextprop(c->win, netatom[NetWMName], c->name, sizeof c->name))
gettextprop(c->win, wmatom[WMName], c->name, sizeof c->name);
}
void
updatewmhints(Client *c) {
XWMHints *wmh;
if((wmh = XGetWMHints(dpy, c->win))) {
if(c == sel)
sel->isurgent = False;
else
c->isurgent = (wmh->flags & XUrgencyHint) ? True : False;
XFree(wmh);
}
}
void
view(const char *arg) {
seltags ^= 1; /* toggle sel tagset */
memset(tagset[seltags], (NULL == arg), TAGSZ);
tagset[seltags][idxoftag(arg)] = True;
arrange();
}
void
viewprevtag(const char *arg) {
seltags ^= 1; /* toggle sel tagset */
arrange();
}
/* 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. */
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_GrabButton && ee->error_code == BadAccess)
|| (ee->request_code == X_GrabKey && ee->error_code == BadAccess)
|| (ee->request_code == X_CopyArea && ee->error_code == BadDrawable))
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
xerrordummy(Display *dpy, XErrorEvent *ee) {
return 0;
}
/* Startup Error handler to check if another window manager
* is already running. */
int
xerrorstart(Display *dpy, XErrorEvent *ee) {
otherwm = True;
return -1;
}
int
main(int argc, char *argv[]) {
if(argc == 2 && !strcmp("-v", argv[1]))
eprint("dwm-"VERSION", © 2006-2008 dwm engineers, see LICENSE for details\n");
else if(argc != 1)
eprint("usage: dwm [-v]\n");
setlocale(LC_CTYPE, "");
if(!(dpy = XOpenDisplay(0)))
eprint("dwm: cannot open display\n");
checkotherwm();
setup();
scan();
run();
cleanup();
XCloseDisplay(dpy);
return 0;
}
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