move gpui-components to ui crate

crates/ui/src/input/change.rs

@@ -0,0 +1,39 @@
+use std::{fmt::Debug, ops::Range};
+
+use crate::history::HistoryItem;
+
+#[derive(Debug, Clone)]
+pub struct Change {
+    pub(crate) old_range: Range<usize>,
+    pub(crate) old_text: String,
+    pub(crate) new_range: Range<usize>,
+    pub(crate) new_text: String,
+    version: usize,
+}
+
+impl Change {
+    pub fn new(
+        old_range: Range<usize>,
+        old_text: &str,
+        new_range: Range<usize>,
+        new_text: &str,
+    ) -> Self {
+        Self {
+            old_range,
+            old_text: old_text.to_string(),
+            new_range,
+            new_text: new_text.to_string(),
+            version: 0,
+        }
+    }
+}
+
+impl HistoryItem for Change {
+    fn version(&self) -> usize {
+        self.version
+    }
+
+    fn set_version(&mut self, version: usize) {
+        self.version = version;
+    }
+}