intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 36 insertions, 0 deletions

diff --git a/contrib/python/prompt-toolkit/py3/prompt_toolkit/key_binding/emacs_state.py b/contrib/python/prompt-toolkit/py3/prompt_toolkit/key_binding/emacs_state.py
new file mode 100644
index 0000000000..4c996224a0
--- /dev/null
+++ b/contrib/python/prompt-toolkit/py3/prompt_toolkit/key_binding/emacs_state.py
@@ -0,0 +1,36 @@
+from typing import List, Optional
+
+from .key_processor import KeyPress
+
+__all__ = [
+    "EmacsState",
+]
+
+
+class EmacsState:
+    """
+    Mutable class to hold Emacs specific state.
+    """
+
+    def __init__(self) -> None:
+        # Simple macro recording. (Like Readline does.)
+        # (For Emacs mode.)
+        self.macro: Optional[List[KeyPress]] = []
+        self.current_recording: Optional[List[KeyPress]] = None
+
+    def reset(self) -> None:
+        self.current_recording = None
+
+    @property
+    def is_recording(self) -> bool:
+        "Tell whether we are recording a macro."
+        return self.current_recording is not None
+
+    def start_macro(self) -> None:
+        "Start recording macro."
+        self.current_recording = []
+
+    def end_macro(self) -> None:
+        "End recording macro."
+        self.macro = self.current_recording
+        self.current_recording = None