[dev] [dwm] bugfix for multi monitor setup

[Brian L Angus]

Hello and thanks for the wonder that is dwm.

Below is a patch for issues I have found with 2 monitors where one
monitor is below another.

The issue can be found when moving a floating window that fills the
entire available area from one monitor to another.  (This is with a
borderpx of 0)

thanks,
Brian


Index: dwm.c
===================================================================
--- dwm.c
+++ dwm.c
@@ -338,18 +338,18 @@
                        *x = 0;
                if(*y + *h + 2 * c->bw < 0)
                        *y = 0;
        }
        else {
-               if(*x > m->mx + m->mw)
-                       *x = m->mx + m->mw - WIDTH(c);
-               if(*y > m->my + m->mh)
-                       *y = m->my + m->mh - HEIGHT(c);
-               if(*x + *w + 2 * c->bw < m->mx)
-                       *x = m->mx;
-               if(*y + *h + 2 * c->bw < m->my)
-                       *y = m->my;
+               if(*x >= m->wx + m->ww)
+                       *x = m->wx + m->ww - WIDTH(c);
+               if(*y >= m->wy + m->wh)
+                       *y = m->wy + m->wh - HEIGHT(c);
+               if(*x + *w + 2 * c->bw <= m->wx)
+                       *x = m->wx;
+               if(*y + *h + 2 * c->bw <= m->wy)
+                       *y = m->wy;
        }
        if(*h < bh)
                *h = bh;
        if(*w < bh)
                *w = bh;
@@ -1144,11 +1144,11 @@
                        c->x = c->mon->mx + c->mon->mw - WIDTH(c);
                if(c->y + HEIGHT(c) > c->mon->my + c->mon->mh)
                        c->y = c->mon->my + c->mon->mh - HEIGHT(c);
                c->x = MAX(c->x, c->mon->mx);
                /* only fix client y-offset, if the client center might cover 
the bar */
-               c->y = MAX(c->y, ((c->mon->by == 0) && (c->x + (c->w / 2) >= 
c->mon->wx)
+               c->y = MAX(c->y, ((c->mon->by == c->mon->my) && (c->x + (c->w / 
2) >= c->mon->wx)
                           && (c->x + (c->w / 2) < c->mon->wx + c->mon->ww)) ? 
bh : c->mon->my);
                c->bw = borderpx;
        }
        wc.border_width = c->bw;
        XConfigureWindow(dpy, w, CWBorderWidth, &wc);