+/**
+ * Updates the percent attribute of the children of the given container. This
+ * function needs to be called when a window is added or removed from a
+ * container.
+ *
+ */
+void con_fix_percent(Con *con);
+
+/**
+ * Toggles fullscreen mode for the given container. Fullscreen mode will not be
+ * entered when there already is a fullscreen container on this workspace.
+ *
+ */
+void con_toggle_fullscreen(Con *con, int fullscreen_mode);
+
+/**
+ * Moves the given container to the currently focused container on the given
+ * workspace.
+ * TODO: is there a better place for this function?
+ *
+ */
+void con_move_to_workspace(Con *con, Con *workspace);
+
+/**
+ * Returns the orientation of the given container (for stacked containers,
+ * vertical orientation is used regardless of the actual orientation of the
+ * container).
+ *
+ */
+int con_orientation(Con *con);
+
+/**
+ * Returns the container which will be focused next when the given container
+ * is not available anymore. Called in tree_close and con_move_to_workspace
+ * to properly restore focus.
+ *
+ */
+Con *con_next_focused(Con *con);
+
+/**
+ * Get the next/previous container in the specified orientation. This may
+ * travel up until it finds a container with suitable orientation.
+ *
+ */
+Con *con_get_next(Con *con, char way, orientation_t orientation);
+
+/**
+ * Returns the focused con inside this client, descending the tree as far as
+ * possible. This comes in handy when attaching a con to a workspace at the
+ * currently focused position, for example.
+ *
+ */
+Con *con_descend_focused(Con *con);
+
+/**
+ * Returns the focused con inside this client, descending the tree as far as
+ * possible. This comes in handy when attaching a con to a workspace at the
+ * currently focused position, for example.
+ *
+ * Works like con_descend_focused but considers only tiling cons.
+ *
+ */
+Con *con_descend_tiling_focused(Con *con);
+
+/**
+ * Returns a "relative" Rect which contains the amount of pixels that need to
+ * be added to the original Rect to get the final position (obviously the
+ * amount of pixels for normal, 1pixel and borderless are different).
+ *
+ */
+Rect con_border_style_rect(Con *con);
+
+/**
+ * Use this function to get a container’s border style. This is important
+ * because when inside a stack, the border style is always BS_NORMAL.
+ * For tabbed mode, the same applies, with one exception: when the container is
+ * borderless and the only element in the tabbed container, the border is not
+ * rendered.
+ *
+ * For children of a CT_DOCKAREA, the border style is always none.
+ *
+ */
+int con_border_style(Con *con);
+
+/**
+ * This function changes the layout of a given container. Use it to handle
+ * special cases like changing a whole workspace to stacked/tabbed (creates a
+ * new split container before).
+ *
+ */
+void con_set_layout(Con *con, int layout);
+
+/**
+ * Determines the minimum size of the given con by looking at its children (for
+ * split/stacked/tabbed cons). Will be called when resizing floating cons
+ *
+ */
+Rect con_minimum_size(Con *con);