avoid reverting the border if it's not necessary (avoids some flashing on view())

diff --git a/dwm.c b/dwm.c
index c9a6b0a..bad06f4 100644 (file)
--- a/dwm.c
+++ b/dwm.c
@@ -179,7 +179,7 @@ static void setclientstate(Client *c, long state);
 static void setlayout(const Arg *arg);
 static void setmfact(const Arg *arg);
 static void setup(void);
-static void showhide(Client *c);
+static void showhide(Client *c, unsigned int ntiled);
 static void sigchld(int signal);
 static void spawn(const Arg *arg);
 static void tag(const Arg *arg);
@@ -283,7 +283,11 @@ applyrules(Client *c) {
 
 void
 arrange(void) {
-       showhide(stack);
+       unsigned int nt;
+       Client *c;
+
+       for(nt = 0, c = nexttiled(clients); c; c = nexttiled(c->next), nt++);
+       showhide(stack, nt);
        focus(NULL);
        if(lt[sellt]->arrange)
                lt[sellt]->arrange();
@@ -1341,18 +1345,19 @@ setup(void) {
 }
 
 void
-showhide(Client *c) {
+showhide(Client *c, unsigned int ntiled) {
        if(!c)
                return;
        if(ISVISIBLE(c)) { /* show clients top down */
-               adjustborder(c, borderpx);
+               if(ntiled > 1) /* avoid unnecessary border reverts */
+                       adjustborder(c, borderpx);
                XMoveWindow(dpy, c->win, c->x, c->y);
                if(!lt[sellt]->arrange || c->isfloating)
                        resize(c, c->x, c->y, c->w, c->h, True);
-               showhide(c->snext);
+               showhide(c->snext, ntiled);
        }
        else { /* hide clients bottom up */
-               showhide(c->snext);
+               showhide(c->snext, ntiled);
                XMoveWindow(dpy, c->win, c->x + 2 * sw, c->y);
        }
 }