dwm

dynamic window manager - with my changes
git clone https://pi.duncano.de/git/dwm.git
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commit 82ec7a7ed4f3ba376faadfc2aca783b24618575f
parent e7300e0f6f10900b50d15ea3ae8949049431e38b
Author: Anselm R Garbe <anselm@garbe.us>
Date:   Fri, 18 Sep 2009 21:18:00 +0100

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
Diffstat:
dwm.c | 101++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-------------------
1 file changed, 77 insertions(+), 24 deletions(-)

diff --git 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