M plugins/focus.c → plugins/focus.c

@@ -1,9 +1,86 @@ 
 #include "../kernel/dispatch.h"
+#include "../kernel/screen.h"
+#include "../kernel/client.h"
+#include "../kernel/stacking.h"
 
-void startup()
+static GSList **focus_order = NULL;
+
+static void events(ObEvent *e, void *foo)
+{
+    guint i;
+    guint new, old;
+    GSList *it;
+
+    switch (e->type) {
+    case Event_Client_Mapped:
+        /* focus new normal windows */
+        if (client_normal(e->data.c.client))
+            client_focus(e->data.c.client);
+        break;
+
+    case Event_Ob_NumDesktops:
+        new = e->data.o.num[0];
+        old = e->data.o.num[1];
+        /* free our lists for the desktops which have disappeared */
+        for (i = new; i < old; ++i)
+            g_slist_free(focus_order[i]);
+        /* realloc the array */
+        focus_order = g_renew(GSList*, focus_order, new);
+        /* set the new lists to be empty */
+        for (i = old; i < new; ++i)
+            focus_order[i] = NULL;
+        break;
+
+    case Event_Client_Desktop:
+        old = e->data.c.num[1];
+        if (old != DESKTOP_ALL)
+            focus_order[old] = g_slist_remove(focus_order[old],
+                                              e->data.c.client);
+        else
+            for (i = 0; i < screen_num_desktops; ++i)
+                focus_order[i] = g_slist_remove(focus_order[i],
+                                                e->data.c.client);
+        break;
+
+    case Event_Ob_Desktop:
+        for (it = focus_order[e->data.o.num[0]]; it != NULL; it = it->next)
+            if (client_focus(it->data))
+                break;
+        break;
+
+    case Event_Client_Focus:
+        /* move to the top of the list */
+        focus_order[e->data.c.num[1]] =
+        g_slist_remove(focus_order[e->data.c.num[1]], e->data.c.client);
+        focus_order[e->data.c.num[1]] =
+        g_slist_prepend(focus_order[e->data.c.num[1]], e->data.c.client);
+        break;
+
+    default:
+        g_assert_not_reached();
+    }
+}
+
+void plugin_startup()
 {
+    guint i;
+
+    dispatch_register(Event_Client_Mapped | Event_Ob_Desktop |
+                      Event_Ob_NumDesktops | Event_Client_Focus |
+                      Event_Client_Desktop, (EventHandler)events, NULL);
+
+    focus_order = g_new(GSList*, screen_num_desktops);
+    for (i = 0; i < screen_num_desktops; ++i)
+        focus_order[i] = NULL;
 }
 
-void shutdown()
+void plugin_shutdown()
 {
+    guint i;
+
+    dispatch_register(0, (EventHandler)events, NULL);
+
+    for (i = 0; i < screen_num_desktops; ++i)
+        g_slist_free(focus_order[i]);
+    g_free(focus_order);
 }