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from __future__ import unicode_literals
import logging
from prompt_toolkit.enums import EditingMode
from prompt_toolkit.key_binding import KeyBindings
from prompt_toolkit.filters import completion_is_selected
_logger = logging.getLogger(__name__)
def pgcli_bindings(pgcli):
"""Custom key bindings for pgcli."""
kb = KeyBindings()
tab_insert_text = ' ' * 4
@kb.add('f2')
def _(event):
"""Enable/Disable SmartCompletion Mode."""
_logger.debug('Detected F2 key.')
pgcli.completer.smart_completion = not pgcli.completer.smart_completion
@kb.add('f3')
def _(event):
"""Enable/Disable Multiline Mode."""
_logger.debug('Detected F3 key.')
pgcli.multi_line = not pgcli.multi_line
@kb.add('f4')
def _(event):
"""Toggle between Vi and Emacs mode."""
_logger.debug('Detected F4 key.')
pgcli.vi_mode = not pgcli.vi_mode
event.app.editing_mode = EditingMode.VI if pgcli.vi_mode else EditingMode.EMACS
@kb.add('tab')
def _(event):
"""Force autocompletion at cursor on non-empty lines."""
_logger.debug('Detected <Tab> key.')
buff = event.app.current_buffer
doc = buff.document
if doc.on_first_line or doc.current_line.strip():
if buff.complete_state:
buff.complete_next()
else:
buff.start_completion(select_first=True)
else:
buff.insert_text(tab_insert_text, fire_event=False)
@kb.add('escape')
def _(event):
"""Force closing of autocompletion."""
_logger.debug('Detected <Esc> key.')
event.current_buffer.complete_state = None
event.app.current_buffer.complete_state = None
@kb.add('c-space')
def _(event):
"""
Initialize autocompletion at cursor.
If the autocompletion menu is not showing, display it with the
appropriate completions for the context.
If the menu is showing, select the next completion.
"""
_logger.debug('Detected <C-Space> key.')
b = event.app.current_buffer
if b.complete_state:
b.complete_next()
else:
b.start_completion(select_first=False)
@kb.add('enter', filter=completion_is_selected)
def _(event):
"""Makes the enter key work as the tab key only when showing the menu.
In other words, don't execute query when enter is pressed in
the completion dropdown menu, instead close the dropdown menu
(accept current selection).
"""
_logger.debug('Detected enter key.')
event.current_buffer.complete_state = None
event.app.current_buffer.complete_state = None
return kb
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