1 files changed, 17 insertions, 3 deletions
diff --git a/src/data.h b/src/data.h
index e87d63e..9f0d2fd 100644
--- a/src/data.h
+++ b/src/data.h
@@ -106,9 +106,8 @@ struct screen_info
 
   char *display_string;
 
-  /* A list of frames that may or may not contain windows. There should
-     always be one in the list. */
-  struct list_head rp_window_frames;
+  /* A tree of frame splits. */
+  rp_split_tree *split_tree;
 
   /* Keep track of which numbers have been given to frames. */
   struct numset *frames_numset;
@@ -118,6 +117,21 @@ struct screen_info
   rp_window_frame *rp_current_frame;
 };
 
+rp_split_tree
+{
+  /* The width and height of this node. */
+  int width, height;
+
+  /* The frame occupying this split. If this is a leaf node, then
+     frame will not be a pointer to an actual frame, otherwise it'll
+     be NULL. */
+  rp_window_frame *frame;
+
+  /* A list of rp_split_tree children. By convention this list is
+     always has 0 or 2 elements in it. */
+  struct list_head children;
+}
+
 struct rp_action
 {
   KeySym key;