[dates] Truncate task summary when confirming deletion

[Ross Burton <rburton src gnome org>]

commit 569dc650a64d32338c6db6c5c1b071ff8cf8552a
Author: Ross Burton <ross linux intel com>
Date:   Wed Jul 29 15:15:14 2009 +0100

    Truncate task summary when confirming deletion

 src/dates_callbacks.c |   51 +++++++++++++++++++++++++++++++++++++++++++-----
 1 files changed, 45 insertions(+), 6 deletions(-)
---
diff --git a/src/dates_callbacks.c b/src/dates_callbacks.c
index 6a8fce3..4979371 100644
--- a/src/dates_callbacks.c
+++ b/src/dates_callbacks.c
@@ -1052,12 +1052,48 @@ dates_details_ok_cb (GtkWidget *source, DatesData *d)
     }
 }
 
+static char *
+str_truncate (const char *long_str, guint max_length)
+{
+  char *p;
+  char *p_end;
+  const char *ellipsis_text;
+
+  if (max_length == 0)
+    return NULL;
+
+  if (!g_utf8_validate (long_str, -1, NULL))
+    return NULL;
+
+  p = g_strdup (long_str);
+
+  if (g_utf8_strlen (p, -1) < max_length)
+    return p;
+
+  /* 3 characters so that we definitely have space for ellipsis */
+  p_end = g_utf8_offset_to_pointer (p, max_length - 3);
+
+  /* Write an ellipsis */
+  if (g_unichar_iswide (g_utf8_get_char (p)))
+    ellipsis_text = "\342\213\257"; /* U+22EF: MIDLINE HORIZONTAL ELLIPSIS, used for CJK */
+  else
+    ellipsis_text = "\342\200\246"; /* U+2026: HORIZONTAL ELLIPSIS */
+  g_utf8_strncpy (p_end, ellipsis_text, 1);
+
+  /* Terminate the string */
+  p_end = g_utf8_next_char (p_end);
+  *p_end = '\0';
+
+  return p;
+}
+
 void
 dates_delete_cb (GtkWidget *source, DatesData *d)
 {
     ECalComponentText summary;
     GtkWidget *widget;
-    const char *value;
+    const char *orig_value;
+    char *value;
 #ifdef WITH_HILDON
     gchar *tmp;
 #endif
@@ -1065,16 +1101,18 @@ dates_delete_cb (GtkWidget *source, DatesData *d)
     e_cal_component_get_summary (d->comp, &summary);
     widget = d->details_dialog;
     if (GTK_WIDGET_VISIBLE (widget))
-	value = gtk_entry_get_text (GTK_ENTRY (d->details_summary_entry));
+	orig_value = gtk_entry_get_text (GTK_ENTRY (d->details_summary_entry));
     else if (summary.value)
-	value = summary.value;
+	orig_value = summary.value;
     else if (summary.altrep)
-	value = summary.altrep;
+	orig_value = summary.altrep;
     else {
 	g_warning ("Deleting event with no summary");
-	value = _("Unknown event");
+	orig_value = _("Unknown event");
     }
-		
+
+    value = str_truncate (orig_value, 50);
+
 #ifdef WITH_HILDON
     tmp = g_strdup_printf(_("Are you sure you want to delete event '%s'?"), value);
     widget = hildon_note_new_confirmation_add_buttons(
@@ -1118,6 +1156,7 @@ dates_delete_cb (GtkWidget *source, DatesData *d)
     }
 	
     gtk_widget_destroy (widget);
+    g_free (value);
 }
 
 void