[theme-adium] implement edit_message()

This is done via DOM manipulation, we find the id for the <span> tag we
wrapped the message in in the previous commit. We then replace the innerHTML
with the new message.

This requires a version of WebKitGtk 1.3.x, but I'm not precisely sure what. I
used WebKitGtk 1.4.0, but natty only has 1.3.13, so we'll try setting that as
the dep.

Need to somehow mark a message as edited. Could set a class on it, but that
requires support in the theme. Need inspiration here.

1 files changed, 63 insertions, 1 deletions

diff --git a/libempathy-gtk/empathy-theme-adium.c b/libempathy-gtk/empathy-theme-adium.c
index 712c2fbc5..05758ed9d 100644
--- a/libempathy-gtk/empathy-theme-adium.c
+++ b/libempathy-gtk/empathy-theme-adium.c
@@ -643,6 +643,63 @@ theme_adium_append_event (EmpathyChatView *view,
 }
 
 static void
+theme_adium_edit_message (EmpathyChatView *view,
+			  EmpathyMessage  *message)
+{
+	EmpathyThemeAdiumPriv *priv = GET_PRIV (view);
+	WebKitDOMDocument *doc;
+	WebKitDOMElement *span;
+	gchar *id, *parsed_body;
+	GError *error = NULL;
+
+	if (priv->pages_loading != 0) {
+		priv->message_queue = g_list_prepend (priv->message_queue,
+						      g_object_ref (message));
+		return;
+	}
+
+	id = g_strdup_printf ("message-token-%s",
+		empathy_message_get_supersedes (message));
+	/* we don't pass a token here, because doing so will return another
+	 * <span> element, and we don't want nested <span> elements */
+	parsed_body = theme_adium_parse_body (
+		empathy_message_get_body (message), NULL);
+
+	/* find the element */
+	doc = webkit_web_view_get_dom_document (WEBKIT_WEB_VIEW (view));
+	span = webkit_dom_document_get_element_by_id (doc, id);
+
+	if (span == NULL) {
+		DEBUG ("Failed to find id '%s'", id);
+		goto except;
+	}
+
+	if (!WEBKIT_DOM_IS_HTML_ELEMENT (span)) {
+		DEBUG ("Not a HTML element");
+		goto except;
+	}
+
+	/* update the HTML */
+	webkit_dom_html_element_set_inner_html (WEBKIT_DOM_HTML_ELEMENT (span),
+		parsed_body, &error);
+
+	if (error != NULL) {
+		DEBUG ("Error setting new inner-HTML: %s", error->message);
+		g_error_free (error);
+	}
+
+	goto finally;
+
+except:
+	DEBUG ("Could not find message to edit with: %s",
+		empathy_message_get_body (message));
+
+finally:
+	g_free (id);
+	g_free (parsed_body);
+}
+
+static void
 theme_adium_scroll (EmpathyChatView *view,
 		    gboolean         allow_scrolling)
 {
@@ -852,6 +909,7 @@ theme_adium_iface_init (EmpathyChatViewIface *iface)
 {
 	iface->append_message = theme_adium_append_message;
 	iface->append_event = theme_adium_append_event;
+	iface->edit_message = theme_adium_edit_message;
 	iface->scroll = theme_adium_scroll;
 	iface->scroll_down = theme_adium_scroll_down;
 	iface->get_has_selection = theme_adium_get_has_selection;
@@ -882,7 +940,11 @@ theme_adium_load_finished_cb (WebKitWebView  *view,
 	while (priv->message_queue) {
 		EmpathyMessage *message = priv->message_queue->data;
 
-		theme_adium_append_message (chat_view, message);
+		if (empathy_message_is_edit (message))
+			theme_adium_edit_message (chat_view, message);
+		else
+			theme_adium_append_message (chat_view, message);
+
 		priv->message_queue = g_list_remove (priv->message_queue, message);
 		g_object_unref (message);
 	}