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-rw-r--r--dwm.c101
1 files changed, 77 insertions, 24 deletions
diff --git a/dwm.c b/dwm.c
index 1cb07d3..2b4d6b0 100644
--- a/dwm.c
+++ b/dwm.c
@@ -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);
@@ -535,14 +535,15 @@ configurenotify(XEvent *e) {
if(ev->window == root) {
sw = ev->width;
sh = ev->height;
- updategeom();
- if(dc.drawable != 0)
- XFreePixmap(dpy, dc.drawable);
- dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
- updatebars();
- for(m = mons; m; m = m->next)
- XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
- arrange();
+ if(updategeom()) {
+ if(dc.drawable != 0)
+ XFreePixmap(dpy, dc.drawable);
+ dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
+ updatebars();
+ for(m = mons; m; m = m->next)
+ XMoveResizeWindow(dpy, m->barwin, m->wx, m->by, m->ww, bh);
+ arrange();
+ }
}
}
@@ -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)
- --nn;
- n = nn; /* we only consider unique geometries as separate screens */
+ 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;
+ }
+ 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++) {
- 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;
+ 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