preserve all text attributes on cleared cells

some terminals require it (alacritty wants to render underline and
inverse state of cleared cells, for instance, so we have to be sure that
the diff algorithm will properly reset the cursor attributes before
clearing cells)

1 files changed, 5 insertions, 12 deletions

diff --git a/src/cell.rs b/src/cell.rs
index 4f26cb5..05d93be 100644
--- a/src/cell.rs
+++ b/src/cell.rs
@@ -17,16 +17,10 @@ impl PartialEq<Cell> for Cell {
         if self.len != other.len {
             return false;
         }
-        let len = self.len();
-        if len > 0 {
-            if self.attrs != other.attrs {
-                return false;
-            }
-        } else {
-            if self.attrs.bgcolor != other.attrs.bgcolor {
-                return false;
-            }
+        if self.attrs != other.attrs {
+            return false;
         }
+        let len = self.len();
         self.contents[..len] == other.contents[..len]
     }
 }
@@ -83,10 +77,9 @@ impl Cell {
         self.set_wide(new_contents[0].width().unwrap_or(0) > 1);
     }
 
-    pub(crate) fn clear(&mut self, bgcolor: crate::attrs::Color) {
+    pub(crate) fn clear(&mut self, attrs: crate::attrs::Attrs) {
         self.len = 0;
-        self.attrs.clear();
-        self.attrs.bgcolor = bgcolor;
+        self.attrs = attrs;
     }
 
     /// Returns the text contents of the cell.