def edit_file(filename):
manager = KeyBindingManager(enable_vi_mode=True, enable_system_prompt=True)
manager.vi_state.input_mode = InputMode.NAVIGATION
layout = HSplit([
Header(),
Window(content=BufferControl(show_line_numbers=AlwaysOn(),
lexer=get_lexer_for_filename(
filename).__class__)),
VimToolbar(filename, manager),
VimInputBar(),
SystemToolbar(),
SearchToolbar(),
])
with codecs.open(filename, 'r', 'utf-8') as f:
text = f.read()
@manager.registry.add_binding(':',
filter=ViStateFilter(manager.vi_state,
InputMode.NAVIGATION))
def enter_command_mode(event):
"""
Entering command mode.
"""
event.cli.focus_stack.push('vim-input')
manager.vi_state.input_mode = InputMode.INSERT
@manager.registry.add_binding(Keys.Escape, filter=HasFocus('vim-input'))
@manager.registry.add_binding(Keys.ControlC, filter=HasFocus('vim-input'))
@manager.registry.add_binding(
Keys.Backspace,
filter=HasFocus('vim-input')
& Condition(lambda cli: cli.buffers['vim-input'].text == ''))
def leave_command_mode(event):
"""
Leaving command mode.
"""
event.cli.focus_stack.pop()
manager.vi_state.input_mode = InputMode.NAVIGATION
event.cli.buffers['vim-input'].document = Document()
@manager.registry.add_binding(Keys.ControlJ, filter=HasFocus('vim-input'))
def process_command(event):
"""
Handling of commands.
"""
text = event.current_buffer.text
def save():
with codecs.open(filename, 'w', 'utf-8') as f:
f.write(event.cli.buffers['default'].text)
def leave_command_mode():
event.cli.focus_stack.pop()
manager.vi_state.input_mode = InputMode.NAVIGATION
event.cli.buffers['vim-input'].document = Document()
if text == 'w':
save()
leave_command_mode()
elif text in ('wq', 'wqa'):
save()
event.cli.set_return_value('')
elif text in ('q', 'qa', 'q!', 'qa!'):
event.cli.set_return_value('')
else:
leave_command_mode()
# TODO: validation of other commands.
cli = CommandLineInterface(
layout=layout,
renderer=Renderer(use_alternate_screen=True),
key_bindings_registry=manager.registry,
buffers={
'default':
Buffer(returnable=AlwaysOff(),
is_multiline=True,
initial_document=Document(text, 0)),
'vim-input':
Buffer(returnable=AlwaysOff()),
},
style=VimStyle,
)
# Run interface.
cli.read_input()
