xinerama support

1 files changed, 41 insertions, 0 deletions

diff --git a/openbox/extensions.c b/openbox/extensions.c
index be1ac547..ddcb83bb 100644
--- a/openbox/extensions.c
+++ b/openbox/extensions.c
@@ -1,5 +1,7 @@
 #include "openbox.h"
+#include "geom.h"
 #include "extensions.h"
+#include "screen.h"
 
 gboolean extensions_xkb       = FALSE;
 int      extensions_xkb_event_basep;
@@ -7,6 +9,7 @@ gboolean extensions_shape     = FALSE;
 int      extensions_shape_event_basep;
 gboolean extensions_xinerama  = FALSE;
 int      extensions_xinerama_event_basep;
+gboolean extensions_xinerama_active = FALSE;
 gboolean extensions_randr     = FALSE;
 int      extensions_randr_event_basep;
 gboolean extensions_vidmode   = FALSE;
@@ -33,6 +36,7 @@ void extensions_query_all()
     extensions_xinerama =
 	XineramaQueryExtension(ob_display, &extensions_xinerama_event_basep,
 			       &junk);
+    extensions_xinerama_active = XineramaIsActive(ob_display);
 #endif
 
 #ifdef XRANDR
@@ -47,3 +51,40 @@ void extensions_query_all()
                                   &junk);
 #endif
 }
+
+void extensions_xinerama_screens(Rect **xin_areas, guint *nxin)
+{
+    guint i;
+    gint l, r, t, b;
+#ifdef XINERAMA
+    if (extensions_xinerama_active) {
+        guint i;
+        gint n;
+        XineramaScreenInfo *info = XineramaQueryScreens(ob_display, &n);
+        *nxin = n;
+        *xin_areas = g_new(Rect, *nxin + 1);
+        for (i = 0; i < *nxin; ++i)
+            RECT_SET((*xin_areas)[i], info[i].x_org, info[i].y_org,
+                     info[i].width, info[i].height);
+    } else
+#endif
+    {
+        *nxin = 1;
+        *xin_areas = g_new(Rect, *nxin + 1);
+        RECT_SET((*xin_areas)[0], 0, 0,
+                 screen_physical_size.width, screen_physical_size.height);
+    }
+
+    /* returns one extra with the total area in it */
+    l = (*xin_areas)[0].x;
+    t = (*xin_areas)[0].y;
+    r = (*xin_areas)[0].x + (*xin_areas)[0].width - 1;
+    b = (*xin_areas)[0].y + (*xin_areas)[0].height - 1;
+    for (i = 1; i < *nxin; ++i) {
+        l = MIN(l, (*xin_areas)[i].x);
+        t = MIN(l, (*xin_areas)[i].y);
+        r = MIN(r, (*xin_areas)[0].x + (*xin_areas)[0].width - 1);
+        b = MIN(b, (*xin_areas)[0].y + (*xin_areas)[0].height - 1);
+    }
+    RECT_SET((*xin_areas)[*nxin], l, t, r - l + 1, b - t + 1);
+}