Add screen.c

cmd/wmii/screen.c

@@ -0,0 +1,99 @@
+/* Copyright ©2006-2008 Kris Maglione <maglione.k at Gmail>
+ * See LICENSE file for license details.
+ */
+#include "dat.h"
+#include <math.h>
+#include <stdlib.h>
+#include "fns.h"
+
+#ifdef notdef
+void
+mapscreens(void) {
+	WMScreen *s, *ss;
+	Rectangle r;
+	int i, j;
+
+#define frob(left, min, max, x, y) \
+	if(Dy(r) > 0) /* If they intersect at some point on this axis */        \
+	if(ss->r.min.x < s->r.min.x) {                                          \
+		if((!s->left)                                                   \
+		|| (abs(Dy(r)) < abs(s->left.max.x - s->min.x))) \
+			s->left = ss;                                           \
+	}
+
+	/* Variable hell? Certainly. */
+	for(i=0; i < nscreens; i++) {
+		s = screens[i];
+		for(j=0; j < nscreens; j++) {
+			if(i == j)
+				continue;
+			ss = screens[j];
+			r = rect_intersection(ss->r, s->r);
+			frob(left,   min, max, x, y);
+			frob(right,  max, min, x, y);
+			frob(atop,   min, max, y, x);
+			frob(below,  max, min, y, x);
+		}
+	}
+#undef frob
+}
+
+int	findscreen(Rectangle, int);
+int
+findscreen(Rectangle rect, int direction) {
+	Rectangle r;
+	WMScreen *ss, *s;
+	int best, i, j;
+
+	best = -1;
+#define frob(min, max, x, y)
+	if(Dy(r) > 0) /* If they intersect at some point on this axis */
+	if(ss->r.min.x < rect.min.x) {
+		if(best == -1
+		|| (abs(ss->r.max.x - rect.min.x) < abs(screens[best]->r.max.x - rect.min.x)))
+			best = s->idx;
+	}
+
+	/* Variable hell? Certainly. */
+	for(i=0; i < nscreens; i++) {
+		ss = screens[j];
+		r = rect_intersection(ss->r, rect);
+		switch(direction) {
+		default:
+			return -1;
+		case West:
+			frob(min, max, x, y);
+			break;
+		case East:
+			frob(max, min, x, y);
+			break;
+		case North:
+			frob(min, max, y, x);
+			break;
+		case South:
+			frob(max, min, y, x);
+			break;
+		}
+	}
+#undef frob
+}
+#endif
+
+int
+ownerscreen(Rectangle r) {
+	Rectangle isect;
+	int s, a, best, besta;
+
+	SET(besta);
+	best = -1;
+	for(s=0; s < nscreens; s++) {
+		isect = rect_intersection(r, screens[s]->r);
+		a = Dx(isect) * Dy(isect);
+		if(best < 0 || a > besta) {
+			besta = a;
+			best = s;
+		}
+	}
+	return best;
+}
+