Introduce direction / orientation / position conversion functions

include/data.h

@@ -59,6 +59,8 @@ typedef enum { D_LEFT,
 typedef enum { NO_ORIENTATION = 0,
                HORIZ,
                VERT } orientation_t;
+typedef enum { BEFORE,
+               AFTER } position_t;
 typedef enum { BS_NORMAL = 0,
                BS_NONE = 1,
                BS_PIXEL = 2 } border_style_t;

include/move.h

@@ -17,9 +17,6 @@
  */
 void tree_move(Con *con, direction_t direction);
 
-typedef enum { BEFORE,
-               AFTER } position_t;
-
 /**
  * This function detaches 'con' from its parent and inserts it either before or
  * after 'target'.

include/util.h

@@ -181,3 +181,15 @@ ssize_t slurp(const char *path, char **buf);
  *
  */
 orientation_t orientation_from_direction(direction_t direction);
+
+/**
+ * Convert a direction to its corresponding position.
+ *
+ */
+position_t position_from_direction(direction_t direction);
+
+/**
+ * Convert orientation and position to the corresponding direction.
+ *
+ */
+direction_t direction_from_orientation_position(orientation_t orientation, position_t position);

src/util.c

@@ -518,3 +518,23 @@ ssize_t slurp(const char *path, char **buf) {
 orientation_t orientation_from_direction(direction_t direction) {
     return (direction == D_LEFT || direction == D_RIGHT) ? HORIZ : VERT;
 }
+
+/*
+ * Convert a direction to its corresponding position.
+ *
+ */
+position_t position_from_direction(direction_t direction) {
+    return (direction == D_LEFT || direction == D_UP) ? BEFORE : AFTER;
+}
+
+/*
+ * Convert orientation and position to the corresponding direction.
+ *
+ */
+direction_t direction_from_orientation_position(orientation_t orientation, position_t position) {
+    if (orientation == HORIZ) {
+        return position == BEFORE ? D_LEFT : D_RIGHT;
+    } else {
+        return position == BEFORE ? D_UP : D_DOWN;
+    }
+}