Notify when a paste buffer is deleted, GitHub issue 3302 from George

Nachman.

control-notify.c

@@ -234,3 +234,16 @@ control_notify_session_window_changed(struct session *s)
 		    s->curw->window->id);
 	}
 }
+
+void
+control_notify_paste_buffer_changed(const char *name)
+{
+	struct client	*c;
+
+	TAILQ_FOREACH(c, &clients, entry) {
+		if (!CONTROL_SHOULD_NOTIFY_CLIENT(c))
+			continue;
+
+		control_write(c, "%%paste-changed %s", name);
+	}
+}

notify.c

@@ -33,6 +33,7 @@ struct notify_entry {
 	struct session		*session;
 	struct window		*window;
 	int			 pane;
+	const char		*pbname;
 };
 
 static struct cmdq_item *
@@ -150,6 +151,8 @@ notify_callback(struct cmdq_item *item, void *data)
 		control_notify_session_closed(ne->session);
 	if (strcmp(ne->name, "session-window-changed") == 0)
 		control_notify_session_window_changed(ne->session);
+	if (strcmp(ne->name, "paste-buffer-changed") == 0)
+		control_notify_paste_buffer_changed(ne->pbname);
 
 	notify_insert_hook(item, ne);
 
@@ -165,6 +168,7 @@ notify_callback(struct cmdq_item *item, void *data)
 
 	format_free(ne->formats);
 	free((void *)ne->name);
+	free((void *)ne->pbname);
 	free(ne);
 
 	return (CMD_RETURN_NORMAL);
@@ -172,7 +176,8 @@ notify_callback(struct cmdq_item *item, void *data)
 
 static void
 notify_add(const char *name, struct cmd_find_state *fs, struct client *c,
-    struct session *s, struct window *w, struct window_pane *wp)
+    struct session *s, struct window *w, struct window_pane *wp,
+    const char *pbname)
 {
 	struct notify_entry	*ne;
 	struct cmdq_item	*item;
@@ -188,6 +193,7 @@ notify_add(const char *name, struct cmd_find_state *fs, struct client *c,
 	ne->session = s;
 	ne->window = w;
 	ne->pane = (wp != NULL ? wp->id : -1);
+	ne->pbname = (pbname != NULL ? xstrdup(pbname) : NULL);
 
 	ne->formats = format_create(NULL, NULL, 0, FORMAT_NOJOBS);
 	format_add(ne->formats, "hook", "%s", name);
@@ -249,7 +255,7 @@ notify_client(const char *name, struct client *c)
 	struct cmd_find_state	fs;
 
 	cmd_find_from_client(&fs, c, 0);
-	notify_add(name, &fs, c, NULL, NULL, NULL);
+	notify_add(name, &fs, c, NULL, NULL, NULL, NULL);
 }
 
 void
@@ -261,7 +267,7 @@ notify_session(const char *name, struct session *s)
 		cmd_find_from_session(&fs, s, 0);
 	else
 		cmd_find_from_nothing(&fs, 0);
-	notify_add(name, &fs, NULL, s, NULL, NULL);
+	notify_add(name, &fs, NULL, s, NULL, NULL, NULL);
 }
 
 void
@@ -270,7 +276,7 @@ notify_winlink(const char *name, struct winlink *wl)
 	struct cmd_find_state	fs;
 
 	cmd_find_from_winlink(&fs, wl, 0);
-	notify_add(name, &fs, NULL, wl->session, wl->window, NULL);
+	notify_add(name, &fs, NULL, wl->session, wl->window, NULL, NULL);
 }
 
 void
@@ -279,7 +285,7 @@ notify_session_window(const char *name, struct session *s, struct window *w)
 	struct cmd_find_state	fs;
 
 	cmd_find_from_session_window(&fs, s, w, 0);
-	notify_add(name, &fs, NULL, s, w, NULL);
+	notify_add(name, &fs, NULL, s, w, NULL, NULL);
 }
 
 void
@@ -288,7 +294,7 @@ notify_window(const char *name, struct window *w)
 	struct cmd_find_state	fs;
 
 	cmd_find_from_window(&fs, w, 0);
-	notify_add(name, &fs, NULL, NULL, w, NULL);
+	notify_add(name, &fs, NULL, NULL, w, NULL, NULL);
 }
 
 void
@@ -297,5 +303,14 @@ notify_pane(const char *name, struct window_pane *wp)
 	struct cmd_find_state	fs;
 
 	cmd_find_from_pane(&fs, wp, 0);
-	notify_add(name, &fs, NULL, NULL, NULL, wp);
+	notify_add(name, &fs, NULL, NULL, NULL, wp, NULL);
+}
+
+void
+notify_paste_buffer(const char *pbname)
+{
+  	struct cmd_find_state	fs;
+
+	cmd_find_clear_state(&fs, 0);
+	notify_add("paste-buffer-changed", &fs, NULL, NULL, NULL, NULL, pbname);
 }

paste.c

@@ -151,6 +151,8 @@ paste_get_name(const char *name)
 void
 paste_free(struct paste_buffer *pb)
 {
+	notify_paste_buffer(pb->name);
+
 	RB_REMOVE(paste_name_tree, &paste_by_name, pb);
 	RB_REMOVE(paste_time_tree, &paste_by_time, pb);
 	if (pb->automatic)
@@ -207,6 +209,8 @@ paste_add(const char *prefix, char *data, size_t size)
 	pb->order = paste_next_order++;
 	RB_INSERT(paste_name_tree, &paste_by_name, pb);
 	RB_INSERT(paste_time_tree, &paste_by_time, pb);
+
+	notify_paste_buffer(pb->name);
 }
 
 /* Rename a paste buffer. */
@@ -254,6 +258,9 @@ paste_rename(const char *oldname, const char *newname, char **cause)
 
 	RB_INSERT(paste_name_tree, &paste_by_name, pb);
 
+	notify_paste_buffer(oldname);
+	notify_paste_buffer(newname);
+
 	return (0);
 }
 
@@ -302,6 +309,8 @@ paste_set(char *data, size_t size, const char *name, char **cause)
 	RB_INSERT(paste_name_tree, &paste_by_name, pb);
 	RB_INSERT(paste_time_tree, &paste_by_time, pb);
 
+	notify_paste_buffer(name);
+
 	return (0);
 }
 
@@ -312,6 +321,8 @@ paste_replace(struct paste_buffer *pb, char *data, size_t size)
 	free(pb->data);
 	pb->data = data;
 	pb->size = size;
+
+	notify_paste_buffer(pb->name);
 }
 
 /* Convert start of buffer into a nice string. */

tmux.1

@@ -6596,6 +6596,10 @@ escapes non-printable characters and backslash as octal \\xxx.
 The pane with ID
 .Ar pane-id
 has changed mode.
+.It Ic %paste-buffer-changed Ar name
+Paste buffer
+.Ar name
+has been changed.
 .It Ic %pause Ar pane-id
 The pane has been paused (if the
 .Ar pause-after

tmux.h

@@ -2154,6 +2154,7 @@ void	notify_winlink(const char *, struct winlink *);
 void	notify_session_window(const char *, struct session *, struct window *);
 void	notify_window(const char *, struct window *);
 void	notify_pane(const char *, struct window_pane *);
+void	notify_paste_buffer(const char *);
 
 /* options.c */
 struct options	*options_create(struct options *);
@@ -3174,6 +3175,7 @@ void	control_notify_session_renamed(struct session *);
 void	control_notify_session_created(struct session *);
 void	control_notify_session_closed(struct session *);
 void	control_notify_session_window_changed(struct session *);
+void	control_notify_paste_buffer_changed(const char *);
 
 /* session.c */
 extern struct sessions sessions;