1 files changed, 116 insertions, 0 deletions
diff --git a/c/stacking.c b/c/stacking.c
new file mode 100644
index 00000000..081bde93
--- /dev/null
+++ b/c/stacking.c
@@ -0,0 +1,116 @@
+#include "openbox.h"
+#include "prop.h"
+#include "focus.h"
+#include "client.h"
+#include "frame.h"
+#include <glib.h>
+
+GList  *stacking_list = NULL;
+
+void stacking_set_list()
+{
+    Window *windows, *win_it;
+    GList *it;
+    guint size = g_list_length(stacking_list);
+
+    /* create an array of the window ids (from bottom to top,
+       reverse order!) */
+    if (size > 0) {
+	windows = g_new(Window, size);
+	win_it = windows;
+	for (it = g_list_last(stacking_list); it; it = it->prev, ++win_it)
+	    *win_it = ((Client*)it->data)->window;
+    } else
+	windows = NULL;
+
+    PROP_SET32A(ob_root, net_client_list_stacking, window, windows, size);
+
+    if (windows)
+	g_free(windows);
+}
+
+void stacking_raise(Client *client)
+{
+    Window wins[2];  /* only ever restack 2 windows. */
+    GList *it;
+    Client *m;
+
+    g_assert(stacking_list != NULL); /* this would be bad */
+
+    m = client_find_modal_child(client);
+    /* if we have a modal child, raise it instead, we'll go along tho later */
+    if (m) stacking_raise(m);
+  
+    /* remove the client before looking so we can't run into ourselves */
+    stacking_list = g_list_remove(stacking_list, client);
+  
+    /* the stacking list is from highest to lowest */
+    it = stacking_list;
+    while (it) {
+	Client *c = it->data;
+	if (client->layer >= c->layer && m != c)
+	    break;
+	it = it->next;
+    }
+
+    /*
+      if our new position is the top, we want to stack under the focus_backup.
+      otherwise, we want to stack under the previous window in the stack.
+    */
+    if (it == stacking_list)
+	wins[0] = focus_backup;
+    else if (it != NULL)
+	wins[0] = ((Client*)it->prev->data)->frame->window;
+    else
+	wins[0] = ((Client*)g_list_last(stacking_list)->data)->frame->window;
+    wins[1] = client->frame->window;
+
+    stacking_list = g_list_insert_before(stacking_list, it, client);
+
+    XRestackWindows(ob_display, wins, 2);
+
+    stacking_set_list();
+}
+
+void stacking_lower(Client *client)
+{
+    Window wins[2];  /* only ever restack 2 windows. */
+    GList *it;
+
+    g_assert(stacking_list != NULL); /* this would be bad */
+
+    it = g_list_last(stacking_list);
+
+    if (client->modal && client->transient_for) {
+	/* don't let a modal window lower below its transient_for */
+	it = g_list_find(stacking_list, client->transient_for);
+	g_assert(it != NULL);
+
+	wins[0] = (it == stacking_list ? focus_backup :
+		   ((Client*)it->prev->data)->frame->window);
+	wins[1] = client->frame->window;
+	if (wins[0] == wins[1]) return; /* already right above the window */
+
+	stacking_list = g_list_remove(stacking_list, client);
+	stacking_list = g_list_insert_before(stacking_list, it, client);
+    } else {
+	while (it != stacking_list) {
+	    Client *c = it->data;
+	    if (client->layer >= c->layer)
+		break;
+	    it = it->prev;
+	}
+	if (it->data == client) return; /* already the bottom, return */
+
+	wins[0] = ((Client*)it->data)->frame->window;
+	wins[1] = client->frame->window;
+
+	stacking_list = g_list_remove(stacking_list, client);
+	stacking_list = g_list_insert_before(stacking_list,
+					     it->next, client);
+    }
+
+    XRestackWindows(ob_display, wins, 2);
+    stacking_set_list();
+}
+