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new experimental updategeom() additions that should avoid several problems with Xinerama, this is EXPERIMENTAL and might break something, the algorithms in use are quite complex and cumbersome, patches and comments welcome

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This commit is contained in:
Anselm R Garbe 2009-09-18 21:18:00 +01:00
parent e7300e0f6f
commit 82ec7a7ed4
1 changed files with 77 additions and 24 deletions
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75
dwm.c
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@ -221,7 +221,7 @@ static void toggleview(const Arg *arg);
static void unfocus(Client *c);
static void unmanage(Client *c, Bool destroyed);
static void unmapnotify(XEvent *e);
static void updategeom(void);
static Bool updategeom(void);
static void updatebarpos(Monitor *m);
static void updatebars(void);
static void updatenumlockmask(void);
@ -535,7 +535,7 @@ configurenotify(XEvent *e) {
if(ev->window == root) {
sw = ev->width;
sh = ev->height;
updategeom();
if(updategeom()) {
if(dc.drawable != 0)
XFreePixmap(dpy, dc.drawable);
dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
@ -545,6 +545,7 @@ configurenotify(XEvent *e) {
arrange();
}
}
}
void
configurerequest(XEvent *e) {
@ -1692,26 +1693,73 @@ updatebarpos(Monitor *m) {
m->by = -bh;
}
void
Bool
updategeom(void) {
int i, n = 1;
int i, j, nn = 1, n = 1;
Client *c;
Monitor *newmons = NULL, *m = NULL, *tm;
#ifdef XINERAMA
int nn;
XineramaScreenInfo *info = NULL;
Bool *flags = NULL;
if(XineramaIsActive(dpy))
info = XineramaQueryScreens(dpy, &n);
for(i = 1, nn = n; i < n; i++)
if(info[i - 1].x_org == info[i].x_org && info[i - 1].y_org == info[i].y_org
&& info[i - 1].width == info[i].width && info[i - 1].height == info[i].height)
flags = (Bool *)malloc(sizeof(Bool) * n);
for(i = 0; i < n; i++)
flags[i] = False;
/* next double-loop seeks any combination of retrieved Xinerama info
* with existing monitors, this is used to avoid unnecessary
* re-allocations of monitor structs */
for(i = 0, nn = n; i < n; i++)
for(j = 0, m = mons; m; m = m->next, j++)
if(!flags[j]) {
if((flags[j] = (
info[i].x_org == m->mx
&& info[i].y_org == m->my
&& info[i].width == m->mw
&& info[i].height == m->mh)
))
--nn;
n = nn; /* we only consider unique geometries as separate screens */
}
if(nn == 0) { /* no need to re-allocate monitors */
j = 0;
for(i = 0, m = mons; m; m = m->next, i++) {
m->num = info[i].screen_number;
if(info[i].x_org != m->mx
|| info[i].y_org != m->my
|| info[i].width != m->mw
|| info[i].height != m->mh)
{
m->mx = m->wx = info[i].x_org;
m->my = m->wy = info[i].y_org;
m->mw = m->ww = info[i].width;
m->mh = m->wh = info[i].height;
updatebarpos(m);
j++;
}
}
XFree(info);
free(flags);
return j > 0;
}
/* next algorithm only considers unique geometries as separate screens */
for(i = 0; i < n; i++)
flags[i] = False; /* used for ignoring certain monitors */
for(i = 0, nn = n; i < n; i++)
for(j = 0; j < n; j++)
if(i != j && !flags[i]) {
if((flags[i] = (
info[i].x_org == info[j].x_org
&& info[i].y_org == info[j].y_org
&& info[i].width == info[j].width
&& info[i].height == info[j].height)
))
--nn;
}
#endif /* XINERAMA */
/* allocate monitor(s) for the new geometry setup */
for(i = 0; i < n; i++) {
for(i = 0; i < nn; i++) {
if(!(m = (Monitor *)malloc(sizeof(Monitor))))
die("fatal: could not malloc() %u bytes\n", sizeof(Monitor));
m->next = newmons;
@ -1720,14 +1768,18 @@ updategeom(void) {
/* initialise monitor(s) */
#ifdef XINERAMA
if(XineramaIsActive(dpy)) {
for(i = 0, m = newmons; m; m = m->next, i++) {
for(i = 0, m = newmons; m && i < n; i++) {
if(!flags[i]) { /* only use screens that aren't dublettes */
m->num = info[i].screen_number;
m->mx = m->wx = info[i].x_org;
m->my = m->wy = info[i].y_org;
m->mw = m->ww = info[i].width;
m->mh = m->wh = info[i].height;
m = m->next;
}
}
XFree(info);
free(flags);
}
else
#endif /* XINERAMA */
@ -1767,6 +1819,7 @@ updategeom(void) {
cleanupmons();
selmon = mons = newmons;
selmon = wintomon(root);
return True;
}
void