Implement title_format

This implements the title_format command, with a new placeholder %shell
which gets substituted with the view type (xwayland, xdg_shell_v6 or
wl_shell).

Example config:

    for_window [title=".*"] title_format %title (class=%class instance=%instance shell=%shell)

1 files changed, 3 insertions, 3 deletions

diff --git a/include/sway/tree/container.h b/include/sway/tree/container.h
index b07af72c..61ab7ca1 100644
--- a/include/sway/tree/container.h
+++ b/include/sway/tree/container.h
@@ -63,7 +63,8 @@ struct sway_container {
          */
         size_t id;
 
-        char *name;
+        char *name;            // The view's title (unformatted)
+        char *formatted_title; // The title displayed in the title bar
 
         enum sway_container_type type;
         enum sway_container_layout layout;
@@ -204,7 +205,6 @@ void container_update_title_textures(struct sway_container *container);
  */
 void container_calculate_title_height(struct sway_container *container);
 
-void container_update_title(struct sway_container *container,
-                const char *new_title);
+void container_notify_child_title_changed(struct sway_container *container);
 
 #endif