[empathy: 2/7] LogWindow: highlight the searched text

[Emilio Pozuelo Monfort <epm src gnome org>]

commit 5faa536ed6fc6ce21421900d4ddea64c61f5182a
Author: Emilio Pozuelo Monfort <emilio pozuelo collabora co uk>
Date:   Mon Jun 20 17:38:32 2011 +0100

    LogWindow: highlight the searched text
    
    https://bugzilla.gnome.org/show_bug.cgi?id=652522

 libempathy-gtk/empathy-log-window.c |   57 ++++++++++++++++++++++++++++++----
 1 files changed, 50 insertions(+), 7 deletions(-)
---
diff --git a/libempathy-gtk/empathy-log-window.c b/libempathy-gtk/empathy-log-window.c
index 4d304c5..773cfaf 100644
--- a/libempathy-gtk/empathy-log-window.c
+++ b/libempathy-gtk/empathy-log-window.c
@@ -804,7 +804,7 @@ log_window_append_chat_message (TplEvent *event,
 {
   GtkTreeStore *store = log_window->store_events;
   GtkTreeIter iter, parent;
-  gchar *pretty_date, *body;
+  gchar *pretty_date, *alias, *body, *msg;
   GDateTime *date;
 
   date = g_date_time_new_from_unix_utc (
@@ -814,21 +814,62 @@ log_window_append_chat_message (TplEvent *event,
 
   get_parent_iter_for_message (event, message, &parent);
 
+  msg = g_markup_escape_text (empathy_message_get_body (message), -1);
+  alias = g_markup_escape_text (
+      tpl_entity_get_alias (tpl_event_get_sender (event)), -1);
+
+  /* If the user is searching, highlight the matched text */
+  if (!EMP_STR_EMPTY (log_window->last_find))
+    {
+      gchar *str = g_regex_escape_string (log_window->last_find, -1);
+      gchar *replacement = g_markup_printf_escaped (
+          "<span background=\"yellow\">%s</span>",
+          log_window->last_find);
+      GError *error = NULL;
+      GRegex *regex = g_regex_new (str, 0, 0, &error);
+
+      if (regex == NULL)
+        {
+          DEBUG ("Could not create regex: %s", error->message);
+          g_error_free (error);
+        }
+      else
+        {
+          gchar *new_msg = g_regex_replace_literal (regex,
+              empathy_message_get_body (message), -1, 0, replacement,
+              0, &error);
+
+          if (new_msg != NULL)
+            {
+              /* We pass ownership of new_msg to msg, which is freed later */
+              g_free (msg);
+              msg = new_msg;
+            }
+          else
+            {
+              DEBUG ("Error while performing string substitution: %s",
+                  error->message);
+              g_error_free (error);
+            }
+        }
+
+      g_free (str);
+      g_free (replacement);
+
+      tp_clear_pointer (&regex, g_regex_unref);
+    }
+
   if (tpl_text_event_get_message_type (TPL_TEXT_EVENT (event))
       == TP_CHANNEL_TEXT_MESSAGE_TYPE_ACTION)
     {
       /* Translators: this is an emote: '* Danielle waves' */
-      body = g_markup_printf_escaped (_("<i>* %s %s</i>"),
-          tpl_entity_get_alias (tpl_event_get_sender (event)),
-          empathy_message_get_body (message));
+      body = g_strdup_printf (_("<i>* %s %s</i>"), alias, msg);
     }
   else
     {
       /* Translators: this is a message: 'Danielle: hello'
        * The string in bold is the sender's name */
-      body = g_markup_printf_escaped (_("<b>%s:</b> %s"),
-          tpl_entity_get_alias (tpl_event_get_sender (event)),
-          empathy_message_get_body (message));
+      body = g_strdup_printf (_("<b>%s:</b> %s"), alias, msg);
     }
 
   gtk_tree_store_append (store, &iter, &parent);
@@ -842,7 +883,9 @@ log_window_append_chat_message (TplEvent *event,
       COL_EVENTS_EVENT, event,
       -1);
 
+  g_free (msg);
   g_free (body);
+  g_free (alias);
   g_free (pretty_date);
   g_date_time_unref (date);
 }