Refactor functions for easy reuse

include/output.h

@@ -14,3 +14,10 @@
  *
  */
 Con *output_get_content(Con *output);
+
+/**
+ * Returns an 'output' corresponding to one of left/right/down/up or a specific
+ * output name.
+ *
+ */
+Output *get_output_from_string(Output *current_output, const char *output_str);

include/workspace.h

@@ -179,3 +179,10 @@ Con *workspace_attach_to(Con *ws);
  * The container inherits the layout from the workspace.
  */
 Con *workspace_encapsulate(Con *ws);
+
+/**
+ * Move the given workspace to the specified output.
+ * This returns true if and only if moving the workspace was successful.
+ *
+ */
+bool workspace_move_to_output(Con *ws, char *output);