[gnome-calendar] event-widget: escape event summary

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit e406f93239b551b6de4d2e7d0a52989cdf16db0c
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Mon Mar 6 21:51:58 2017 -0300

    event-widget: escape event summary
    
    Now that we may set event markups, we have
    to be careful to escape the event summary
    and make sure that we always pass a valid
    markup.

 src/gcal-event-widget.c |   16 ++++++++++++----
 1 files changed, 12 insertions(+), 4 deletions(-)
---
diff --git a/src/gcal-event-widget.c b/src/gcal-event-widget.c
index e4d6309..f7e5035 100644
--- a/src/gcal-event-widget.c
+++ b/src/gcal-event-widget.c
@@ -473,6 +473,7 @@ gcal_event_widget_draw (GtkWidget *widget,
   PangoLayout *layout;
   PangoFontDescription *font_desc;
   gchar *display_text;
+  gchar *escaped_text;
 
   self = GCAL_EVENT_WIDGET (widget);
   context = gtk_widget_get_style_context (widget);
@@ -488,12 +489,18 @@ gcal_event_widget_draw (GtkWidget *widget,
   gtk_render_frame (context, cr, 0, 0, width, height);
 
   /*
+   * Since we set markup labels, we have to escape text before
+   * using it, or we get empty event widgets.
+   */
+  escaped_text = g_markup_escape_text (gcal_event_get_summary (self->event), -1);
+
+  /*
    * The text displayed in the widget includes the time when the event
    * is timed, or not if the event is all day.
    */
   if (gcal_event_get_all_day (self->event))
     {
-      display_text = g_strdup (gcal_event_get_summary (self->event));
+      display_text = escaped_text;
     }
   else
     {
@@ -514,16 +521,17 @@ gcal_event_widget_draw (GtkWidget *widget,
       if (self->orientation == GTK_ORIENTATION_HORIZONTAL)
         {
           if (is_ltr)
-            display_text = g_strdup_printf ("(%s) %s", start_time, gcal_event_get_summary (self->event));
+            display_text = g_strdup_printf ("(%s) %s", start_time, escaped_text);
           else
-            display_text = g_strdup_printf ("%s (%s)", gcal_event_get_summary (self->event), start_time);
+            display_text = g_strdup_printf ("%s (%s)", escaped_text, start_time);
         }
       else
         {
-          display_text = g_strdup_printf ("<b>%s</b>\n%s", start_time, gcal_event_get_summary (self->event));
+          display_text = g_strdup_printf ("<b>%s</b>\n%s", start_time, escaped_text);
         }
 
       g_clear_pointer (&local_start_time, g_date_time_unref);
+      g_clear_pointer (&escaped_text, g_free);
       g_clear_pointer (&start_time, g_free);
     }