i3/include/window.h

#ifndef _WINDOW_H
#define _WINDOW_H

/**
 * Updates the WM_CLASS (consisting of the class and instance) for the
 * given window.
 *
 */
void window_update_class(i3Window *win, xcb_get_property_reply_t *prop);

/**
 * Updates the name by using _NET_WM_NAME (encoded in UTF-8) for the given
 * window. Further updates using window_update_name_legacy will be ignored.
 *
 */
void window_update_name(i3Window *win, xcb_get_property_reply_t *prop);

/**
 * Updates the name by using WM_NAME (encoded in COMPOUND_TEXT). We do not
 * touch what the client sends us but pass it to xcb_image_text_8. To get
 * proper unicode rendering, the application has to use _NET_WM_NAME (see
 * window_update_name()).
 *
 */
void window_update_name_legacy(i3Window *win, xcb_get_property_reply_t *prop);

#endif