Add --edit-mode option ... (#92)

Add --edit-mode option for prompt-toolkit only. Fixes #85

Author: rocky

mathicsscript/__main__.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+#   Copyright (C) 2025 Rocky Bernstein <[email protected]>
 # -*- coding: utf-8 -*-
 
 import os
@@ -239,7 +240,19 @@ def fmt_fun(query: Any) -> Any:
             shell.reset_lineno()
 
 
+if click.__version__ >= "7.":
+    case_sensitive = {"case_sensitive": False}
+else:
+    case_sensitive = {}
+
+
 @click.command()
+@click.option(
+    "--edit-mode",
+    "-e",
+    type=click.Choice(["emacs", "vi"], **case_sensitive),
+    help="Set initial edit mode (when using prompt toolkit only)",
+)
 @click.version_option(version=__version__)
 @click.option(
     "--full-form",
@@ -364,6 +377,7 @@ def fmt_fun(query: Any) -> Any:
 )
 @click.argument("file", nargs=1, type=click.Path(readable=True), required=False)
 def main(
+    edit_mode,
     full_form,
     persist,
     quiet,
@@ -422,7 +436,7 @@ def main(
     readline = "none" if (execute or file and not persist) else readline.lower()
     if readline == "prompt":
         shell = TerminalShellPromptToolKit(
-            definitions, style, completion, unicode, prompt
+            definitions, style, completion, unicode, prompt, edit_mode
         )
     else:
         want_readline = readline == "gnu"

mathicsscript/termshell_prompt.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-#   Copyright (C) 2021-2022 Rocky Bernstein <[email protected]>
+#   Copyright (C) 2021-2022, 2025 Rocky Bernstein <[email protected]>
 
 import locale
 import os
@@ -8,42 +8,41 @@
 import sys
 from typing import Optional
 
-from mathics_pygments.lexer import MathematicaLexer, MToken
-from mathicsscript.completion import MathicsCompleter
-from mathicsscript.termshell import (
-    CONFIGDIR,
-    HISTSIZE,
-    USER_INPUTRC,
-    is_pygments_style,
-    ShellEscapeException,
-    SymbolPygmentsStylesAvailable,
-    TerminalShellCommon,
-)
-from mathicsscript.version import __version__
-
+from colorama import init as colorama_init
 from mathics.core.atoms import String
 from mathics.core.attributes import attribute_string_to_number
 from mathics.core.expression import Expression, from_python
 from mathics.core.rules import Rule
 from mathics.core.systemsymbols import SymbolMessageName
-
-from mathicsscript.bindkeys import bindings, read_inputrc, read_init_file
-
-from prompt_toolkit import PromptSession, HTML, print_formatted_text
+from mathics_pygments.lexer import MathematicaLexer, MToken
+from prompt_toolkit import HTML, PromptSession, print_formatted_text
 from prompt_toolkit.application.current import get_app
 from prompt_toolkit.enums import EditingMode
 from prompt_toolkit.history import FileHistory
 from prompt_toolkit.lexers import PygmentsLexer
 from prompt_toolkit.styles.pygments import style_from_pygments_cls
-
-
 from pygments import format, highlight, lex
-from pygments.styles import get_style_by_name
-from pygments.formatters.terminal import TERMINAL_COLORS
 from pygments.formatters import Terminal256Formatter
-from pygments.styles import get_all_styles
+from pygments.formatters.terminal import TERMINAL_COLORS
+from pygments.styles import get_all_styles, get_style_by_name
 from pygments.util import ClassNotFound
 
+# FIXME: __main__ shouldn't be needed. Fix term_background
+from term_background.__main__ import is_dark_background
+
+from mathicsscript.bindkeys import bindings, read_init_file, read_inputrc
+from mathicsscript.completion import MathicsCompleter
+from mathicsscript.termshell import (
+    CONFIGDIR,
+    HISTSIZE,
+    USER_INPUTRC,
+    ShellEscapeException,
+    SymbolPygmentsStylesAvailable,
+    TerminalShellCommon,
+    is_pygments_style,
+)
+from mathicsscript.version import __version__
+
 mma_lexer = MathematicaLexer()
 
 ALL_PYGMENTS_STYLES = list(get_all_styles())
@@ -54,11 +53,6 @@
 color_scheme[MToken.OPERATOR] = ("magenta", "ansibrightmagenta")
 color_scheme[MToken.NUMBER] = ("ansiblue", "ansibrightblue")
 
-from colorama import init as colorama_init
-
-# FIXME: __main__ shouldn't be needed. Fix term_background
-from term_background.__main__ import is_dark_background
-
 HISTFILE = osp.join(CONFIGDIR, "history-ptk")
 
 
@@ -70,6 +64,7 @@ def __init__(
         want_completion: bool,
         use_unicode: bool,
         prompt: bool,
+        edit_mode: Optional[str],
     ):
         super(TerminalShellCommon, self).__init__("<stdin>")
         self.input_encoding = locale.getpreferredencoding()
@@ -79,6 +74,10 @@ def __init__(
         self.prompt = prompt
 
         self.session = PromptSession(history=FileHistory(HISTFILE))
+        if edit_mode is not None:
+            self.session.editing_mode = (
+                EditingMode.VI if edit_mode == "vi" else EditingMode.EMACS
+            )
 
         # Try importing readline to enable arrow keys support etc.
         self.using_readline = False