make unicode normalization optional

it's not always necessary or desired, and adds quite a lot to the binary
size (for instance, the problem it solves is pretty much non-existent in
web browsers, and wasm builds are also very sensitive to code size)

1 files changed, 12 insertions, 1 deletions

diff --git a/src/cell.rs b/src/cell.rs
index 05d93be..ecc44b2 100644
--- a/src/cell.rs
+++ b/src/cell.rs
@@ -1,4 +1,3 @@
-use unicode_normalization::UnicodeNormalization as _;
 use unicode_width::UnicodeWidthChar as _;
 
 const CODEPOINTS_IN_CELL: usize = 6;
@@ -49,6 +48,18 @@ impl Cell {
         self.contents[self.len()] = c;
         self.len += 1;
 
+        self.normalize();
+    }
+
+    #[cfg(not(feature = "unicode-normalization"))]
+    #[inline]
+    fn normalize(&mut self) {}
+
+    #[cfg(feature = "unicode-normalization")]
+    #[inline]
+    fn normalize(&mut self) {
+        use unicode_normalization::UnicodeNormalization as _;
+
         // some fonts have combined characters but can't render combining
         // characters correctly, so try to prefer precombined characters when
         // possible