Compute grapheme index in find_cursor_position for TextInput

native/src/text.rs

@@ -1,6 +1,6 @@
 //! Draw and interact with text.
 use crate::alignment;
-use crate::{Color, Point, Rectangle, Size, Vector};
+use crate::{Color, Point, Rectangle, Size};
 
 use std::borrow::Cow;
 
@@ -34,10 +34,6 @@ pub struct Text<'a, Font> {
 pub enum Hit {
     /// The point was within the bounds of the returned character index.
     CharOffset(usize),
-    /// The provided point was not within the bounds of a glyph. The index
-    /// of the character with the closest centeroid position is returned,
-    /// as well as its delta.
-    NearestCharOffset(usize, Vector),
 }
 
 impl Hit {
@@ -45,13 +41,6 @@ impl Hit {
     pub fn cursor(self) -> usize {
         match self {
             Self::CharOffset(i) => i,
-            Self::NearestCharOffset(i, delta) => {
-                if delta.x > f32::EPSILON {
-                    i + 1
-                } else {
-                    i
-                }
-            }
         }
     }
 }

native/src/widget/text_input.rs

@@ -1193,17 +1193,26 @@ where
     let size = size.unwrap_or_else(|| renderer.default_size());
 
     let offset = offset(renderer, text_bounds, font, size, value, state);
+    let value = value.to_string();
 
-    renderer
+    let char_offset = renderer
         .hit_test(
-            &value.to_string(),
+            &value,
             size,
             font,
             Size::INFINITY,
             Point::new(x + offset, text_bounds.height / 2.0),
             true,
         )
-        .map(text::Hit::cursor)
+        .map(text::Hit::cursor)?;
+
+    Some(
+        unicode_segmentation::UnicodeSegmentation::graphemes(
+            &value[..char_offset],
+            true,
+        )
+        .count(),
+    )
 }
 
 const CURSOR_BLINK_INTERVAL_MILLIS: u128 = 500;