Report cursor size to InputMethod

Co-authored-by: dcz-self <dcz-self@users.noreply.github.com>

widget/src/scrollable.rs

@@ -785,10 +785,10 @@ where
                 );
 
                 if !had_input_method
-                    && let InputMethod::Enabled { position, .. } =
+                    && let InputMethod::Enabled { cursor, .. } =
                         shell.input_method_mut()
                 {
-                    *position = *position - translation;
+                    *cursor = *cursor - translation;
                 }
             };
 

widget/src/text_editor.rs

@@ -365,11 +365,13 @@ where
             self.text_size.unwrap_or_else(|| renderer.default_size()),
         );
 
-        let position =
-            cursor + translation + Vector::new(0.0, f32::from(line_height));
+        let position = cursor + translation;
 
         InputMethod::Enabled {
-            position,
+            cursor: Rectangle::new(
+                position,
+                Size::new(0.0, f32::from(line_height)),
+            ),
             purpose: input_method::Purpose::Normal,
             preedit: state.preedit.as_ref().map(input_method::Preedit::as_ref),
         }

widget/src/text_input.rs

@@ -428,7 +428,10 @@ where
             + alignment_offset;
 
         InputMethod::Enabled {
-            position: Point::new(x, text_bounds.y + text_bounds.height),
+            cursor: Rectangle::new(
+                Point::new(x, text_bounds.y),
+                Size::new(0.0, text_bounds.height),
+            ),
             purpose: if self.is_secure {
                 input_method::Purpose::Secure
             } else {