[dwm] nonoverlapping floats patch

[Oskar Nordquist]

Hi,

Made a patch that arranges new float windows to be nonoverlapped, or
randomized position if all "slots" are occupied.
Does not work in all cases, but it's better than nothing at least (IMHO).

Regards,

Oskar


diff -r c2d4ba4e9023 dwm.c
--- a/dwm.c     Mon Nov 17 22:53:18 2008 +0100
+++ b/dwm.c     Tue Nov 18 02:17:43 2008 +0100
@@ -133,6 +133,7 @@
 /* function declarations */
 static void applyrules(Client *c);
 static void arrange(void);
+static void arrangefloating(Client *c);
 static void attach(Client *c);
 static void attachaftersel(Client *c);
 static void attachstack(Client *c);
@@ -171,6 +172,7 @@
 static void maprequest(XEvent *e);
 static void monocle(void);
 static void movemouse(const Arg *arg);
+static Client *nextfloating(Client *c);
 static Client *nexttiled(Client *c);
 static void propertynotify(XEvent *e);
 static void quit(const Arg *arg);
@@ -285,6 +287,44 @@
        if(lt[sellt]->arrange)
                lt[sellt]->arrange();
        restack();
+}
+
+void
+arrangefloating(Client *c) {
+       int x, y, w, h;
+       Client *oc;
+       int foundslot=0;
+
+       x = c->x;
+       y = c->y;
+       w = c->w;
+       h = c->h;
+
+       while(!foundslot) {
+               for(oc = nextfloating(clients); oc; oc = 
nextfloating(oc->next)) {
+                       if(x + w <= oc->x) continue;
+                       if(x >= oc->x + oc->w) continue;
+                       if(y + h <= oc->y) continue;
+                       if(y >= oc->y + oc->h) continue;
+                       x = oc->x + oc->w;
+               }
+
+               if(x + w > sw) {
+                       x = c->x;
+                       y++;
+                       if(y + h > sh)
+                               break;
+               }
+               else
+                       foundslot=1;
+       }
+
+       if(!foundslot) {
+               x = rand() % (sw - w);
+               y = rand() % (sh - h);
+       }
+
+       resize(c, x, y, w, h, resizehints);
 }

 void
@@ -931,6 +971,10 @@
                c->isfloating = trans != None || c->isfixed;
        if(c->isfloating)
                XRaiseWindow(dpy, c->win);
+       if(!lt[sellt]->arrange) {
+               c->isfloating = True;
+               arrangefloating(c);
+       }
        attachaftersel(c);
        attachstack(c);
        XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /*
some windows require this */
@@ -1021,6 +1065,12 @@
        if(usegrab)
                XUngrabServer(dpy);
        XUngrabPointer(dpy, CurrentTime);
+}
+
+Client *
+nextfloating(Client *c) {
+       for(; c && (!c->isfloating || !ISVISIBLE(c)); c = c->next);
+       return c;
 }

 Client *