unify view_clips

tui/src/tui_buffer.rs

@@ -15,6 +15,11 @@ pub fn buffer_update (buf: &mut Buffer, area: [u16;4], callback: &impl Fn(&mut C
     pub height:  usize,
     pub content: Vec<Cell>
 }
+impl std::fmt::Debug for BigBuffer {
+    fn fmt (&self, f: &mut std::fmt::Formatter<'_>) -> std::result::Result<(), std::fmt::Error> {
+        write!(f, "[BB {}x{} ({})]", self.width, self.height, self.content.len())
+    }
+}
 impl BigBuffer {
     pub fn new (width: usize, height: usize) -> Self {
         Self { width, height, content: vec![Cell::default(); width*height] }