Adding sortscreens patch

patch/include.c

@@ -94,6 +94,12 @@
 #include "setborderpx.c"
 #endif
 
+#ifdef XINERAMA
+#if SORTSCREENS_PATCH
+#include "sortscreens.c"
+#endif
+#endif
+
 #if STICKY_PATCH
 #include "sticky.c"
 #endif

patch/include.h

@@ -94,6 +94,12 @@
 #include "setborderpx.h"
 #endif
 
+#ifdef XINERAMA
+#if SORTSCREENS_PATCH
+#include "sortscreens.h"
+#endif
+#endif
+
 #if STICKY_PATCH
 #include "sticky.h"
 #endif

patch/sortscreens.c

@@ -0,0 +1,15 @@
+void
+sortscreens(XineramaScreenInfo *screens, int n)
+{
+       int i, j;
+       XineramaScreenInfo *screen = ecalloc(1, sizeof(XineramaScreenInfo));
+
+       for (i = 0; i < n; i++)
+               for (j = i + 1; j < n; j++)
+                       if (RIGHTOF(screens[i], screens[j])) {
+                               memcpy(&screen[0], &screens[i], sizeof(XineramaScreenInfo));
+                               memcpy(&screens[i], &screens[j], sizeof(XineramaScreenInfo));
+                               memcpy(&screens[j], &screen[0], sizeof(XineramaScreenInfo));
+                       }
+       XFree(screen);
+}

patch/sortscreens.h

@@ -0,0 +1,3 @@
+#define RIGHTOF(a,b) (a.y_org > b.y_org) || ((a.y_org == b.y_org) && (a.x_org > b.x_org))
+
+static void sortscreens(XineramaScreenInfo *screens, int n);