- new_value = vadj->value;
-
- if ((offset + rectangle.y + rectangle.height) >
- ((gint) (vadj->value +vadj->page_size))) {
- new_value = (offset + rectangle.y) - vadj->page_size * 0.25;
- if (new_value > vadj->upper - vadj->page_size)
- new_value = vadj->upper - vadj->page_size;
- } else if ((offset + rectangle.y) < ((gint) vadj->value)) {
- new_value = (offset + rectangle.y - vadj->page_size * 0.75);
- if (((gint) (new_value + vadj->page_size)) < (offset + rectangle.y + rectangle.height))
- new_value = offset + rectangle.y + rectangle.height - (gint) vadj->page_size;
- if (new_value < 0.0)
- new_value = 0.0;
- if (new_value > vadj->value)
- new_value = vadj->value;
- }
-
- if (vadj->value != new_value) {
- g_signal_emit_by_name (GTK_TEXT_VIEW(priv->msg_body)->layout,
- "invalidated");
- vadj->value = new_value;
- gtk_adjustment_value_changed (vadj);
- /* invalidate body */
- window = gtk_widget_get_parent_window (priv->msg_body);
- if (window)
- gdk_window_invalidate_rect (window, NULL, TRUE);
- }