stop implementing Default for Cell

5 files changed, 18 insertions, 7 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index f9fb38a..96e29d4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@
 * `Screen::bells_diff`, `Screen::audible_bell_count`,
   `Screen::visual_bell_count`, and `Screen::errors` have been removed in favor
   of the new callback api described above.
+* `Cell` no longer implements `Default`.
 
 ### Changed
 
diff --git a/src/cell.rs b/src/cell.rs
index 240ddf9..b7ddd26 100644
--- a/src/cell.rs
+++ b/src/cell.rs
@@ -3,7 +3,7 @@ use unicode_width::UnicodeWidthChar as _;
 const CODEPOINTS_IN_CELL: usize = 6;
 
 /// Represents a single terminal cell.
-#[derive(Clone, Debug, Default, Eq)]
+#[derive(Clone, Debug, Eq)]
 pub struct Cell {
     contents: [char; CODEPOINTS_IN_CELL],
     len: u8,
@@ -25,6 +25,14 @@ impl PartialEq<Self> for Cell {
 }
 
 impl Cell {
+    pub(crate) fn new() -> Self {
+        Self {
+            contents: Default::default(),
+            len: 0,
+            attrs: crate::attrs::Attrs::default(),
+        }
+    }
+
     #[inline]
     fn len(&self) -> usize {
         usize::from(self.len & 0x0f)
diff --git a/src/grid.rs b/src/grid.rs
index dee4e10..a9ecfff 100644
--- a/src/grid.rs
+++ b/src/grid.rs
@@ -76,7 +76,7 @@ impl Grid {
 
         self.size = size;
         for row in &mut self.rows {
-            row.resize(size.cols, crate::Cell::default());
+            row.resize(size.cols, crate::Cell::new());
         }
         self.rows.resize(usize::from(size.rows), self.new_row());
 
@@ -496,7 +496,7 @@ impl Grid {
             if wide {
                 row.get_mut(pos.col).unwrap().set_wide_continuation(false);
             }
-            row.insert(pos.col, crate::Cell::default());
+            row.insert(pos.col, crate::Cell::new());
             if wide {
                 row.get_mut(pos.col).unwrap().set_wide_continuation(true);
             }
@@ -511,7 +511,7 @@ impl Grid {
         for _ in 0..(count.min(size.cols - pos.col)) {
             row.remove(pos.col);
         }
-        row.resize(size.cols, crate::Cell::default());
+        row.resize(size.cols, crate::Cell::new());
     }
 
     pub fn erase_cells(&mut self, count: u16, attrs: crate::attrs::Attrs) {
diff --git a/src/row.rs b/src/row.rs
index def12f6..b52146c 100644
--- a/src/row.rs
+++ b/src/row.rs
@@ -9,7 +9,7 @@ pub struct Row {
 impl Row {
     pub fn new(cols: u16) -> Self {
         Self {
-            cells: vec![crate::Cell::default(); usize::from(cols)],
+            cells: vec![crate::Cell::new(); usize::from(cols)],
             wrapped: false,
         }
     }
@@ -145,7 +145,7 @@ impl Row {
         prev_attrs: Option<crate::attrs::Attrs>,
     ) -> (crate::grid::Pos, crate::attrs::Attrs) {
         let mut prev_was_wide = false;
-        let default_cell = crate::Cell::default();
+        let default_cell = crate::Cell::new();
 
         let mut prev_pos = prev_pos.unwrap_or_else(|| {
             if wrapping {
diff --git a/tests/helpers/fixtures.rs b/tests/helpers/fixtures.rs
index bc39926..44105ec 100644
--- a/tests/helpers/fixtures.rs
+++ b/tests/helpers/fixtures.rs
@@ -89,12 +89,14 @@ impl FixtureScreen {
 
     #[allow(dead_code)]
     pub fn from_screen(screen: &vt100::Screen) -> Self {
+        let empty_screen = vt100::Parser::default().screen().clone();
+        let empty_cell = empty_screen.cell(0, 0).unwrap();
         let mut cells = std::collections::BTreeMap::new();
         let (rows, cols) = screen.size();
         for row in 0..rows {
             for col in 0..cols {
                 let cell = screen.cell(row, col).unwrap();
-                if cell != &vt100::Cell::default() {
+                if cell != empty_cell {
                     cells.insert(
                         format!("{row},{col}"),
                         FixtureCell::from_cell(cell),