chore: refactor the input component (#165)

* refactor the input component

* fix clippy

* clean up

crates/ui/src/input/change.rs

@@ -1,28 +1,28 @@
 use std::fmt::Debug;
-use std::ops::Range;
 
 use crate::history::HistoryItem;
+use crate::input::cursor::Selection;
 
 #[derive(Debug, PartialEq, Clone)]
 pub struct Change {
-    pub(crate) old_range: Range<usize>,
+    pub(crate) old_range: Selection,
     pub(crate) old_text: String,
-    pub(crate) new_range: Range<usize>,
+    pub(crate) new_range: Selection,
     pub(crate) new_text: String,
     version: usize,
 }
 
 impl Change {
     pub fn new(
-        old_range: Range<usize>,
+        old_range: impl Into<Selection>,
         old_text: &str,
-        new_range: Range<usize>,
+        new_range: impl Into<Selection>,
         new_text: &str,
     ) -> Self {
         Self {
-            old_range,
+            old_range: old_range.into(),
             old_text: old_text.to_string(),
-            new_range,
+            new_range: new_range.into(),
             new_text: new_text.to_string(),
             version: 0,
         }