From 708db8d88c9fd13d8b61adc54e03c28162f33de8 Mon Sep 17 00:00:00 2001
From: Kris Maglione <kris@suckless.org>
Date: Thu, 15 Sep 2011 13:22:17 -0400
Subject: [PATCH] Allow changing screen boundaries with Mod+Mouse3.

---
 cmd/wmii/column.c |  4 ++++
 cmd/wmii/frame.c  |  3 +++
 cmd/wmii/mouse.c  | 19 ++++++++++++-------
 3 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/cmd/wmii/column.c b/cmd/wmii/column.c
index 9538e02d..7881e5a0 100644
--- a/cmd/wmii/column.c
+++ b/cmd/wmii/column.c
@@ -577,10 +577,14 @@ column_resizeframe(Frame *f, Rectangle r) {
 	if(al) {
 		al->r.max.x = a->r.min.x;
 		column_arrange(al, false);
+	}else {
+		v->pad[a->screen].min.x = r.min.x - v->r[a->screen].min.x;
 	}
 	if(ar) {
 		ar->r.min.x = a->r.max.x;
 		column_arrange(ar, false);
+	}else {
+		v->pad[a->screen].max.x = r.max.x - v->r[a->screen].max.x;
 	}
 
 	column_resizeframe_h(f, r);
diff --git a/cmd/wmii/frame.c b/cmd/wmii/frame.c
index 415bed6d..3c1a838b 100644
--- a/cmd/wmii/frame.c
+++ b/cmd/wmii/frame.c
@@ -643,13 +643,16 @@ constrain(Rectangle r, int inset) {
 	for(sp=screens; (s = *sp); sp++) {
 		if(!screen->showing)
 			continue;
+
 		isect = rect_intersection(r, insetrect(s->r, inset));
 		if(Dx(isect) >= 0 && Dy(isect) >= 0)
 			return r;
+
 		if(Dx(isect) <= 0 && Dy(isect) <= 0)
 			n = max(Dx(isect), Dy(isect));
 		else
 			n = min(Dx(isect), Dy(isect));
+
 		if(!sbest || n > best) {
 			sbest = s;
 			best = n;
diff --git a/cmd/wmii/mouse.c b/cmd/wmii/mouse.c
index fd41d7bc..1f705499 100644
--- a/cmd/wmii/mouse.c
+++ b/cmd/wmii/mouse.c
@@ -251,22 +251,26 @@ mouse_resizecolframe(Frame *f, Align align) {
 	min.x = column_minwidth();
 	min.y = /*frame_delta_h() +*/ labelh(def.font);
 	/* Set the limits of where this box may be dragged. */
-#define frob(pred, f, aprev, rmin, rmax, plus, minus, xy) BLOCK(     \
+#define frob(pred, f, aprev, rmin, rmax, plus, minus, xy, use_screen) BLOCK( \
 		if(pred) {                                           \
 			r.rmin.xy = f->aprev->r.rmin.xy plus min.xy; \
 			r.rmax.xy = f->r.rmax.xy minus min.xy;       \
+		}else if(use_screen) {                               \
+			r.rmin.xy = v->r[f->screen].rmin.xy plus 1;  \
+			r.rmax.xy = a->r.rmax.xy minus min.xy;       \
 		}else {                                              \
 			r.rmin.xy = a->r.rmin.xy;                    \
 			r.rmax.xy = r.rmin.xy plus 1;                \
 		})
-	if(align&North)
-		frob(f->aprev, f, aprev, min, max, +, -, y);
+
+	if(align & North)
+		frob(f->aprev, f, aprev, min, max, +, -, y, false);
 	else
-		frob(f->anext, f, anext, max, min, -, +, y);
-	if(align&West)
-		frob(a->prev,  a, prev,  min, max, +, -, x);
+		frob(f->anext, f, anext, max, min, -, +, y, false);
+	if(align & West)
+		frob(a->prev,  a, prev,  min, max, +, -, x, true);
 	else
-		frob(a->next,  a, next,  max, min, -, +, x);
+		frob(a->next,  a, next,  max, min, -, +, x, true);
 #undef frob
 
 	cwin = constraintwin(r);
@@ -415,6 +419,7 @@ mouse_resize(Client *c, Align align, bool grabmod) {
 
 	SET(hrx);
 	SET(hry);
+
 	if(align != Center) {
 		hr = subpt(frect.max, frect.min);
 		hr = divpt(hr, Pt(2, 2));