* 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.
+ * 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
+ * linked client list, the focus history is remembered through a global
* stack list. Each client contains a bit array to indicate the tags of a
* client.
*
#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>
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define MAXTAGLEN 16
#define MOUSEMASK (BUTTONMASK|PointerMotionMask)
-#define NOBORDER(x) ((x) - 2 * c->bw)
+#define WIDTH(x) ((x)->w + 2 * (x)->bw)
+#define HEIGHT(x) ((x)->h + 2 * (x)->bw)
#define TAGMASK ((int)((1LL << LENGTH(tags)) - 1))
#define TEXTW(x) (textnw(x, strlen(x)) + dc.font.height)
static void buttonpress(XEvent *e);
static void checkotherwm(void);
static void cleanup(void);
-static void clearurgent(void);
+static void clearurgent(Client *c);
static void configure(Client *c);
static void configurenotify(XEvent *e);
static void configurerequest(XEvent *e);
static void setmfact(const Arg *arg);
static void setup(void);
static void showhide(Client *c);
+static void sigchld(int signal);
static void spawn(const Arg *arg);
static void tag(const Arg *arg);
static int textnw(const char *text, unsigned int len);
static void updategeom(void);
static void updatenumlockmask(void);
static void updatesizehints(Client *c);
+static void updatestatus(void);
static void updatetitle(Client *c);
static void updatewmhints(Client *c);
static void view(const Arg *arg);
void
arrange(void) {
- if(stack)
- showhide(stack);
+ showhide(stack);
focus(NULL);
if(lt[sellt]->arrange)
lt[sellt]->arrange();
}
void
-clearurgent(void) {
+clearurgent(Client *c) {
XWMHints *wmh;
- Client *c;
-
- for(c = clients; c; c = c->next)
- if(ISVISIBLE(c) && c->isurgent) {
- c->isurgent = False;
- if (!(wmh = XGetWMHints(dpy, c->win)))
- continue;
- wmh->flags &= ~XUrgencyHint;
- XSetWMHints(dpy, c->win, wmh);
- XFree(wmh);
- }
+ c->isurgent = False;
+ if(!(wmh = XGetWMHints(dpy, c->win)))
+ return;
+ wmh->flags &= ~XUrgencyHint;
+ XSetWMHints(dpy, c->win, wmh);
+ XFree(wmh);
}
void
XSetWindowBorder(dpy, sel->win, dc.norm[ColBorder]);
}
if(c) {
+ if(c->isurgent)
+ clearurgent(c);
detachstack(c);
attachstack(c);
grabbuttons(c, True);
void
manage(Window w, XWindowAttributes *wa) {
+ static Client cz;
Client *c, *t = NULL;
Window trans = None;
XWindowChanges wc;
- if(!(c = calloc(1, sizeof(Client))))
- die("fatal: could not calloc() %u bytes\n", sizeof(Client));
+ if(!(c = malloc(sizeof(Client))))
+ die("fatal: could not malloc() %u bytes\n", sizeof(Client));
+ *c = cz;
c->win = w;
/* geometry */
c->bw = 0;
}
else {
- if(c->x + c->w + 2 * c->bw > sx + sw)
- c->x = sx + sw - NOBORDER(c->w);
- if(c->y + c->h + 2 * c->bw > sy + sh)
- c->y = sy + sh - NOBORDER(c->h);
+ if(c->x + WIDTH(c) > sx + sw)
+ c->x = sx + sw - WIDTH(c);
+ if(c->y + HEIGHT(c) > sy + sh)
+ c->y = sy + sh - HEIGHT(c);
c->x = MAX(c->x, sx);
/* only fix client y-offset, if the client center might cover the bar */
c->y = MAX(c->y, ((by == 0) && (c->x + (c->w / 2) >= wx) && (c->x + (c->w / 2) < wx + ww)) ? bh : sy);
Client *c;
for(c = nexttiled(clients); c; c = nexttiled(c->next))
- resize(c, wx, wy, NOBORDER(ww), NOBORDER(wh), resizehints);
+ resize(c, wx, wy, ww - 2 * c->bw, wh - 2 * c->bw, resizehints);
}
void
None, cursor[CurMove], CurrentTime) != GrabSuccess)
return;
XQueryPointer(dpy, root, &dummy, &dummy, &x, &y, &di, &di, &dui);
+ if(usegrab)
+ XGrabServer(dpy);
do {
XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
switch (ev.type) {
handler[ev.type](&ev);
break;
case MotionNotify:
- XSync(dpy, False);
nx = ocx + (ev.xmotion.x - x);
ny = ocy + (ev.xmotion.y - y);
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 - NOBORDER(c->w);
+ else if(abs((wx + ww) - (nx + WIDTH(c))) < snap)
+ nx = wx + ww - WIDTH(c);
if(abs(wy - ny) < snap)
ny = wy;
- else if(abs((wy + wh) - (ny + c->h + 2 * c->bw)) < snap)
- ny = wy + wh - NOBORDER(c->h);
+ else if(abs((wy + wh) - (ny + HEIGHT(c))) < snap)
+ ny = wy + wh - HEIGHT(c);
if(!c->isfloating && lt[sellt]->arrange && (abs(nx - c->x) > snap || abs(ny - c->y) > snap))
togglefloating(NULL);
}
}
}
while(ev.type != ButtonRelease);
+ if(usegrab)
+ XUngrabServer(dpy);
XUngrabPointer(dpy, CurrentTime);
}
Window trans;
XPropertyEvent *ev = &e->xproperty;
- if(ev->state == PropertyDelete)
+ if((ev->window == root) && (ev->atom = XA_WM_NAME))
+ updatestatus();
+ else if(ev->state == PropertyDelete)
return; /* ignore */
- if((c = getclient(ev->window))) {
+ else if((c = getclient(ev->window))) {
switch (ev->atom) {
default: break;
case XA_WM_TRANSIENT_FOR:
void
quit(const Arg *arg) {
- readin = running = False;
+ running = False;
}
void
if(w <= 0 || h <= 0)
return;
if(x > sx + sw)
- x = sw - NOBORDER(w);
+ x = sw - WIDTH(c);
if(y > sy + sh)
- y = sh - NOBORDER(h);
+ y = sh - HEIGHT(c);
if(x + w + 2 * c->bw < sx)
x = sx;
if(y + h + 2 * c->bw < sy)
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);
+ if(usegrab)
+ XGrabServer(dpy);
do {
XMaskEvent(dpy, MOUSEMASK|ExposureMask|SubstructureRedirectMask, &ev);
switch(ev.type) {
handler[ev.type](&ev);
break;
case MotionNotify:
- XSync(dpy, False);
- nw = MAX(ev.xmotion.x - NOBORDER(ocx) + 1, 1);
- nh = MAX(ev.xmotion.y - NOBORDER(ocy) + 1, 1);
+ 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) {
}
}
while(ev.type != ButtonRelease);
+ if(usegrab)
+ XUngrabServer(dpy);
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));
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 */
+ /* main event loop */
XSync(dpy, False);
- xfd = ConnectionNumber(dpy);
- 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;
- die("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 */
- }
+ while(running && !XNextEvent(dpy, &ev)) {
+ if(handler[ev.type])
+ (handler[ev.type])(&ev); /* call handler */
}
}
CWOverrideRedirect|CWBackPixmap|CWEventMask, &wa);
XDefineCursor(dpy, barwin, cursor[CurNormal]);
XMapRaised(dpy, barwin);
- strcpy(stext, "dwm-"VERSION);
- drawbar();
+ updatestatus();
/* EWMH support per view */
XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
/* select for events */
wa.event_mask = SubstructureRedirectMask|SubstructureNotifyMask|ButtonPressMask
- |EnterWindowMask|LeaveWindowMask|StructureNotifyMask;
+ |EnterWindowMask|LeaveWindowMask|StructureNotifyMask
+ |PropertyChangeMask;
XChangeWindowAttributes(dpy, root, CWEventMask|CWCursor, &wa);
XSelectInput(dpy, root, wa.event_mask);
void
showhide(Client *c) {
+ if(!c)
+ return;
if(ISVISIBLE(c)) { /* show clients top down */
XMoveWindow(dpy, c->win, c->x, c->y);
if(!lt[sellt]->arrange || c->isfloating)
resize(c, c->x, c->y, c->w, c->h, True);
+ showhide(c->snext);
}
- if(c->snext) /* hide clients bottom up */
+ else { /* hide clients bottom up */
showhide(c->snext);
- if(!ISVISIBLE(c))
XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
+ }
+}
+
+
+void
+sigchld(int signal) {
+ while(0 < waitpid(-1, NULL, WNOHANG));
}
void
spawn(const Arg *arg) {
- /* The double-fork construct avoids zombie processes and keeps the code
- * clean from stupid signal handlers. */
+ signal(SIGCHLD, sigchld);
if(fork() == 0) {
- if(fork() == 0) {
- if(dpy)
- close(ConnectionNumber(dpy));
- setsid();
- execvp(((char **)arg->v)[0], (char **)arg->v);
- fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
- perror(" failed");
- }
+ if(dpy)
+ close(ConnectionNumber(dpy));
+ setsid();
+ execvp(((char **)arg->v)[0], (char **)arg->v);
+ fprintf(stderr, "dwm: execvp %s", ((char **)arg->v)[0]);
+ perror(" failed");
exit(0);
}
- wait(0);
}
void
/* master */
c = nexttiled(clients);
mw = mfact * ww;
- resize(c, wx, wy, NOBORDER(n == 1 ? ww : mw), NOBORDER(wh), resizehints);
+ resize(c, wx, wy, (n == 1 ? ww : mw) - 2 * c->bw, wh - 2 * c->bw, resizehints);
if(--n == 0)
return;
h = wh;
for(i = 0, c = nexttiled(c->next); c; c = nexttiled(c->next), i++) {
- resize(c, x, y, NOBORDER(w), /* remainder */ ((i + 1 == n)
- ? NOBORDER(wy + wh) - y : h), resizehints);
+ resize(c, x, y, w - 2 * c->bw, /* remainder */ ((i + 1 == n)
+ ? wy + wh - y - 2 * c->bw : h - 2 * c->bw), resizehints);
if(h != wh)
- y = c->y + c->h + 2 * c->bw;
+ y = c->y + HEIGHT(c);
}
}
if(mask) {
tagset[seltags] = mask;
- clearurgent();
arrange();
}
}
long msize;
XSizeHints size;
- XGetWMNormalHints(dpy, c->win, &size, &msize);
+ if(!XGetWMNormalHints(dpy, c->win, &size, &msize))
+ /* size is uninitialized, ensure that size.flags aren't used */
+ size.flags = PSize;
if(size.flags & PBaseSize) {
c->basew = size.base_width;
c->baseh = size.base_height;
}
void
+updatestatus() {
+ if(!gettextprop(root, XA_WM_NAME, stext, sizeof(stext)))
+ strcpy(stext, "dwm-"VERSION);
+ drawbar();
+}
+
+void
updatewmhints(Client *c) {
XWMHints *wmh;
if((wmh = XGetWMHints(dpy, c->win))) {
- if(ISVISIBLE(c) && wmh->flags & XUrgencyHint) {
+ if(c == sel && wmh->flags & XUrgencyHint) {
wmh->flags &= ~XUrgencyHint;
XSetWMHints(dpy, c->win, wmh);
}
seltags ^= 1; /* toggle sel tagset */
if(arg->ui & TAGMASK)
tagset[seltags] = arg->ui & TAGMASK;
- clearurgent();
arrange();
}
Got questions, comments, patches, etc.? Contact Jason Woofenden