Rendering fix

src/sys/pango/item.rs

@@ -20,12 +20,14 @@ glib_wrapper! {
 }
 
 impl Item {
+    #[cfg(test)]
     pub fn new() -> Self {
         unsafe {
             from_glib_none(pango_sys::pango_item_new())
         }
     }
 
+    #[cfg(test)]
     pub fn set_offset(&mut self, offset: i32, length: i32, num_chars: i32) {
         self.0.offset = offset;
         self.0.length = length;

src/ui_model/line.rs

@@ -60,7 +60,7 @@ impl Line {
     }
 
     fn set_cell_to_empty(&mut self, cell_idx: usize) -> bool {
-        if self.item_line[cell_idx].is_some() {
+        if self.is_binded_to_item(cell_idx) {
             self.item_line[cell_idx] = None;
             self.cell_to_item[cell_idx] = -1;
             self.line[cell_idx].dirty = true;