Merge pull request #2175 from xonsh/compup

Complete while typing

news/compup.rst

@@ -0,0 +1,15 @@
+**Added:**
+
+* New ``$UPDATE_COMPLETIONS_ON_KEYPRESS`` controls whether or not completions
+  will automatically display and update while typing. This feature is only
+  available in the prompt-toolkit shell.
+
+**Changed:** None
+
+**Deprecated:** None
+
+**Removed:** None
+
+**Fixed:** None
+
+**Security:** None

xonsh/environ.py

@@ -162,7 +162,9 @@ def DEFAULT_ENSURERS():
     'BOTTOM_TOOLBAR': (is_string_or_callable, ensure_string, ensure_string),
     'SUBSEQUENCE_PATH_COMPLETION': (is_bool, to_bool, bool_to_str),
     'SUPPRESS_BRANCH_TIMEOUT_MESSAGE': (is_bool, to_bool, bool_to_str),
+    'UPDATE_COMPLETIONS_ON_KEYPRESS': (is_bool, to_bool, bool_to_str),
     'UPDATE_OS_ENVIRON': (is_bool, to_bool, bool_to_str),
+    'UPDATE_PROMPT_ON_KEYPRESS': (is_bool, to_bool, bool_to_str),
     'VC_BRANCH_TIMEOUT': (is_float, float, str),
     'VC_HG_SHOW_BRANCH': (is_bool, to_bool, bool_to_str),
     'VI_MODE': (is_bool, to_bool, bool_to_str),
@@ -188,7 +190,6 @@ def DEFAULT_ENSURERS():
     'XONSH_STORE_STDIN': (is_bool, to_bool, bool_to_str),
     'XONSH_TRACEBACK_LOGFILE': (is_logfile_opt, to_logfile_opt, logfile_opt_to_str),
     'XONSH_DATETIME_FORMAT': (is_string, ensure_string, ensure_string),
-    'UPDATE_PROMPT_ON_KEYPRESS': (is_bool, to_bool, bool_to_str),
     }
 
 
@@ -305,7 +306,9 @@ def DEFAULT_VALUES():
         'SUGGEST_MAX_NUM': 5,
         'SUGGEST_THRESHOLD': 3,
         'TITLE': DEFAULT_TITLE,
+        'UPDATE_COMPLETIONS_ON_KEYPRESS': False,
         'UPDATE_OS_ENVIRON': False,
+        'UPDATE_PROMPT_ON_KEYPRESS': False,
         'VC_BRANCH_TIMEOUT': 0.2 if ON_WINDOWS else 0.1,
         'VC_HG_SHOW_BRANCH': True,
         'VI_MODE': False,
@@ -336,7 +339,6 @@ def DEFAULT_VALUES():
         'XONSH_STORE_STDOUT': False,
         'XONSH_TRACEBACK_LOGFILE': None,
         'XONSH_DATETIME_FORMAT': '%Y-%m-%d %H:%M',
-        'UPDATE_PROMPT_ON_KEYPRESS': False,
     }
     if hasattr(locale, 'LC_MESSAGES'):
         dv['LC_MESSAGES'] = locale.setlocale(locale.LC_MESSAGES)
@@ -591,10 +593,19 @@ def DEFAULT_DOCS():
         "in the same manner as ``$PROMPT``, see 'Customizing the Prompt' "
         'http://xon.sh/tutorial.html#customizing-the-prompt.',
         default='``xonsh.environ.DEFAULT_TITLE``'),
+    'UPDATE_COMPLETIONS_ON_KEYPRESS': VarDocs(
+        'Completions display is evaluated and presented whenever a key is '
+        'pressed. This avoids the need to press TAB, except to cycle through '
+        'the possibilities. This currently only affects the prompt-toolkit shell.'
+        ),
     'UPDATE_OS_ENVIRON': VarDocs(
         "If True ``os.environ`` will always be updated "
         "when the xonsh environment changes. The environment can be reset to "
         "the default value by calling ``__xonsh_env__.undo_replace_env()``"),
+    'UPDATE_PROMPT_ON_KEYPRESS': VarDocs(
+        'Disables caching the prompt between commands, '
+        'so that it would be reevaluated on each keypress. '
+        'Disabled by default because of the incurred performance penalty.'),
     'VC_BRANCH_TIMEOUT': VarDocs(
         'The timeout (in seconds) for version control '
         'branch computations. This is a timeout per subprocess call, so the '
@@ -740,10 +751,6 @@ def DEFAULT_DOCS():
     'XONSH_DATETIME_FORMAT': VarDocs(
         'The format that is used for ``datetime.strptime()`` in various places'
         'i.e the history timestamp option'),
-    'UPDATE_PROMPT_ON_KEYPRESS': VarDocs(
-        'Disables caching the prompt between commands, '
-        'so that it would be reevaluated on each keypress. '
-        'Disabled by default because of the incurred performance penalty.'),
     }
 
 

xonsh/ptk/completer.py

@@ -20,9 +20,12 @@ class PromptToolkitCompleter(Completer):
 
     def get_completions(self, document, complete_event):
         """Returns a generator for list of completions."""
-
+        should_complete = (
+            complete_event.completion_requested or
+            builtins.__xonsh_env__.get('UPDATE_COMPLETIONS_ON_KEYPRESS')
+            )
         #  Only generate completions when the user hits tab.
-        if complete_event.completion_requested:
+        if should_complete:
             if self.completer is None:
                 yield from []
             else:

xonsh/ptk/shell.py

@@ -70,6 +70,10 @@ class PromptToolkitShell(BaseShell):
         auto_suggest = auto_suggest if env.get('AUTO_SUGGEST') else None
         completions_display = env.get('COMPLETIONS_DISPLAY')
         multicolumn = (completions_display == 'multi')
+        complete_while_typing = env.get('UPDATE_COMPLETIONS_ON_KEYPRESS')
+        if complete_while_typing:
+            # PTK requires history search to be none when completing while typing
+            enable_history_search = False
         if HAS_PYGMENTS:
             self.styler.style_name = env.get('XONSH_COLOR_STYLE')
         completer = None if completions_display == 'none' else self.pt_completer
@@ -100,6 +104,7 @@ class PromptToolkitShell(BaseShell):
                     'reserve_space_for_menu': 0,
                     'key_bindings_registry': self.key_bindings_manager.registry,
                     'display_completions_in_columns': multicolumn,
+                    'complete_while_typing': complete_while_typing,
                     }
             if builtins.__xonsh_env__.get('COLOR_INPUT'):
                 if HAS_PYGMENTS: