Clean up the code

Author: Jonathan Plasse

src/textual/widgets/_masked_input.py

@@ -200,7 +200,7 @@ def insert_separators(self, value: str, cursor_position: int) -> tuple[str, int]
             cursor_position += 1
         return value, cursor_position
 
-    def insert_text_at_cursor(self, text: str, value: str, cursor_position: int) -> tuple[str, int] | None:
+    def insert_text_at_cursor(self, text: str) -> tuple[str, int] | None:
         """Inserts `text` at current cursor position. If not present in `text`, any expected separator is automatically
         inserted at the correct position.
 
@@ -211,6 +211,8 @@ def insert_text_at_cursor(self, text: str, value: str, cursor_position: int) ->
             A tuple in the form `(value, cursor_position)` with the new control value and current cursor position if
                 `text` matches the template, None otherwise.
         """
+        value = self.input.value
+        cursor_position = self.input.cursor_position
         separators = set(
             [
                 char_definition.char
@@ -610,7 +612,7 @@ def insert_text_at_cursor(self, text: str) -> None:
             text: New text to insert.
         """
 
-        new_value = self._template.insert_text_at_cursor(text, self.value, self.cursor_position)
+        new_value = self._template.insert_text_at_cursor(text)
         if new_value is not None:
             self.value, self.cursor_position = new_value
         else:
@@ -625,33 +627,24 @@ def replace(self, text: str, start: int, end: int):
             end: End index to replace (inclusive).
         """
 
-        previous_cursor_position = self.cursor_position
-        value = self.value
-        cursor_position = start
+        self.cursor_position = start
         for char in text:
-            new_value_cursor_position = self._template.insert_text_at_cursor(char, value, cursor_position)
+            if self.cursor_position >= end:
+                return
+            new_value_cursor_position = self._template.insert_text_at_cursor(char)
             if new_value_cursor_position is None:
-                self.value = value
-                self.cursor_position = previous_cursor_position
                 self.restricted()
                 return
 
-            new_value, new_cursor_position = new_value_cursor_position
-            if new_cursor_position >= end:
-                self.value = new_value[:end] + value[end:]
-                self.cursor_position = new_cursor_position
-                return
+            self.value, self.cursor_position = new_value_cursor_position
 
-            value = new_value
-            cursor_position = new_cursor_position
+        last_cursor_position = self.cursor_position
 
-        self.value = value
-        self.cursor_position = end
-        while self.cursor_position > cursor_position:
-            self._template.move_cursor(-1)
+        while self.cursor_position < end:
             self._template.delete_at_position()
+            self._template.move_cursor(1)
 
-        self.cursor_position = cursor_position
+        self.cursor_position = last_cursor_position
 
     def clear(self) -> None:
         """Clear the masked input."""