[empathy: 19/22] adium: add comment explaining why we add x-empathy-mesage-id-*

[Jonny Lamb <jonnylamb src gnome org>]

commit 1c40d3370a1d2e1e98b1609377e0903a2ca40f6f
Author: Jonny Lamb <jonnylamb gnome org>
Date:   Fri May 13 15:50:38 2011 +0100

    adium: add comment explaining why we add x-empathy-mesage-id-*
    
    Signed-off-by: Jonny Lamb <jonnylamb gnome org>

 libempathy-gtk/empathy-theme-adium.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/libempathy-gtk/empathy-theme-adium.c b/libempathy-gtk/empathy-theme-adium.c
index 8b7f880..095d205 100644
--- a/libempathy-gtk/empathy-theme-adium.c
+++ b/libempathy-gtk/empathy-theme-adium.c
@@ -771,7 +771,11 @@ theme_adium_append_message (EmpathyChatView *view,
 	 * %status% - See %status% in theme_adium_append_html ()
 	 */
 
-	/* x-empathy-message-id-* */
+	/* This is slightly a hack, but it's the only way to add
+	 * arbitrary data to messages in the HTML. We add another
+	 * class called "x-empathy-message-id-*" to the message. This
+	 * way, we can remove the unread marker for this specific
+	 * message later. */
 	tp_msg = empathy_message_get_tp_message (msg);
 	if (tp_msg != NULL) {
 		gchar *tmp = tp_escape_as_identifier (