[clutter] a11y: expose the text with password-char

[Alejandro Piñeiro Iglesias <apinheiro src gnome org>]

commit ccea1644ba81593fd19a772048e91909962ef570
Author: Alejandro Piñeiro <apinheiro igalia com>
Date:   Mon Sep 24 17:24:54 2012 +0200

    a11y: expose the text with password-char
    
    Text exposed by the AtkText methods should be the text
    displayed to the user (like the internal method
    clutter_text_get_display_text). So it should use the password-char
    if it is being used.
    
    This is also a security concern.

 clutter/cally/cally-text.c |   37 ++++++++++++++++++++++++++++---------
 1 files changed, 28 insertions(+), 9 deletions(-)
---
diff --git a/clutter/cally/cally-text.c b/clutter/cally/cally-text.c
index c12aa4f..cf6dfce 100644
--- a/clutter/cally/cally-text.c
+++ b/clutter/cally/cally-text.c
@@ -316,9 +316,9 @@ cally_text_real_initialize(AtkObject *obj,
   _check_activate_action (cally_text, clutter_text);
 
   if (clutter_text_get_password_char (clutter_text) != 0)
-    obj->role = ATK_ROLE_PASSWORD_TEXT;
+    atk_object_set_role (obj, ATK_ROLE_PASSWORD_TEXT);
   else
-    obj->role = ATK_ROLE_TEXT;
+    atk_object_set_role (obj, ATK_ROLE_TEXT);
 }
 
 static AtkStateSet*
@@ -1077,13 +1077,28 @@ cally_text_get_text (AtkText *text,
                      gint end_offset)
 {
   ClutterActor *actor = NULL;
+  PangoLayout *layout = NULL;
+  const gchar *string = NULL;
+  gint character_count = 0;
 
   actor = CALLY_GET_CLUTTER_ACTOR (text);
   if (actor == NULL) /* Object is defunct */
     return NULL;
 
-  return clutter_text_get_chars (CLUTTER_TEXT (actor),
-                                 start_offset, end_offset);
+  /* we use the pango layout instead of clutter_text_get_chars because
+     it take into account password-char */
+
+  layout = clutter_text_get_layout (CLUTTER_TEXT (actor));
+  string = pango_layout_get_text (layout);
+  character_count = pango_layout_get_character_count (layout);
+
+  if (end_offset == -1 || end_offset > character_count)
+    end_offset = character_count;
+
+  if (string[0] == 0)
+    return g_strdup("");
+  else
+    return g_utf8_substring (string, start_offset, end_offset);
 }
 
 static gunichar
@@ -1091,15 +1106,21 @@ cally_text_get_character_at_offset (AtkText *text,
                                     gint     offset)
 {
   ClutterActor *actor      = NULL;
-  gchar        *string     = NULL;
+  const gchar  *string     = NULL;
   gchar        *index      = NULL;
   gunichar      unichar;
+  PangoLayout  *layout = NULL;
 
   actor = CALLY_GET_CLUTTER_ACTOR (text);
   if (actor == NULL) /* State is defunct */
     return '\0';
 
-  string = clutter_text_get_chars (CLUTTER_TEXT (actor), 0, -1);
+  /* we use the pango layout instead of clutter_text_get_chars because
+     it take into account password-char */
+
+  layout = clutter_text_get_layout (CLUTTER_TEXT (actor));
+  string = pango_layout_get_text (layout);
+
   if (offset >= g_utf8_strlen (string, -1))
     {
       unichar = '\0';
@@ -1108,11 +1129,9 @@ cally_text_get_character_at_offset (AtkText *text,
     {
       index = g_utf8_offset_to_pointer (string, offset);
 
-      unichar = g_utf8_get_char(index);
+      unichar = g_utf8_get_char (index);
     }
 
-  g_free(string);
-
   return unichar;
 }