+/* Same as _gtk_text_btree_get_tags(), except it returns GPtrArray,
+ * to be used in gtk_text_layout_get_line_display(). */
+static GPtrArray *
+get_tags_array_at_iter (GtkTextIter *iter)
+{
+ GtkTextTag **tags;
+ GPtrArray *array = NULL;
+ gint n_tags;
+
+ tags = _gtk_text_btree_get_tags (iter, &n_tags);
+
+ if (n_tags > 0)
+ {
+ array = g_ptr_array_sized_new (n_tags);
+ g_ptr_array_set_size (array, n_tags);
+ memcpy (array->pdata, tags, n_tags * sizeof (GtkTextTag*));
+ }
+
+ g_free (tags);
+ return array;
+}
+
+/* Add the tag to the array if it's not there already, and remove
+ * it otherwise. It keeps the array sorted by tags priority. */
+static GPtrArray *
+tags_array_toggle_tag (GPtrArray *array,
+ GtkTextTag *tag)
+{
+ gint pos;
+ GtkTextTag **tags;
+
+ if (array == NULL)
+ array = g_ptr_array_new ();
+
+ tags = (GtkTextTag**) array->pdata;
+
+ for (pos = 0; pos < array->len && tags[pos]->priv->priority < tag->priv->priority; pos++) ;
+
+ if (pos < array->len && tags[pos] == tag)
+ g_ptr_array_remove_index (array, pos);
+ else
+ {
+ g_ptr_array_set_size (array, array->len + 1);
+ if (pos < array->len - 1)
+ memmove (array->pdata + pos + 1, array->pdata + pos,
+ (array->len - pos - 1) * sizeof (GtkTextTag*));
+ array->pdata[pos] = tag;
+ }
+
+ return array;
+}
+