Nvim.__exit__() - Code Metrics - Inspection of "[WIP] closing the event loop" - neovim/python-client - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#303)

by Björn

created 2018-03-01 16:29 UTC

Nvim.exit() A

↳ Parent: Nvim

Complexity

Conditions

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	2

Importance

Changes

Metric	Value
cc	1
dl	0
loc	6
ccs	0
cts	1
cp	0
crap	2
rs	9.4285
c	0
b	0
f	0

"""Main Nvim interface."""
import os
import sys
from functools import partial
from traceback import format_stack

from msgpack import ExtType
# .scrutinizer.yml
before_commands:
    - sudo pip install abc # Python2
    - sudo pip3 install abc # Python3

from .buffer import Buffer
from .common import (Remote, RemoteApi, RemoteMap, RemoteSequence,
                     decode_if_bytes, walk)
from .tabpage import Tabpage
from .window import Window
from ..compat import IS_PYTHON3
from ..util import Version, format_exc_skip

__all__ = ('Nvim')


os_chdir = os.chdir


class Nvim(object):

    """Class that represents a remote Nvim instance.

    This class is main entry point to Nvim remote API, it is a wrapper
    around Session instances.

    The constructor of this class must not be called directly. Instead, the
    `from_session` class method should be used to create the first instance
    from a raw `Session` instance.

    Subsequent instances for the same session can be created by calling the
    `with_decode` instance method to change the decoding behavior or
    `SubClass.from_nvim(nvim)` where `SubClass` is a subclass of `Nvim`, which
    is useful for having multiple `Nvim` objects that behave differently
    without one affecting the other.
    """

    @classmethod
    def from_session(cls, session):
        """Create a new Nvim instance for a Session instance.

        This method must be called to create the first Nvim instance, since it
        queries Nvim metadata for type information and sets a SessionHook for
        creating specialized objects from Nvim remote handles.
        """
        session.error_wrapper = lambda e: NvimError(e[1])
        channel_id, metadata = session.request(b'vim_get_api_info')

        if IS_PYTHON3:
            # decode all metadata strings for python3
            metadata = walk(decode_if_bytes, metadata)

        types = {
            metadata['types']['Buffer']['id']: Buffer,
            metadata['types']['Window']['id']: Window,
            metadata['types']['Tabpage']['id']: Tabpage,
        }

        return cls(session, channel_id, metadata, types)

    @classmethod
    def from_nvim(cls, nvim):
        """Create a new Nvim instance from an existing instance."""
        return cls(nvim._session, nvim.channel_id, nvim.metadata,
class MyParent:
    def __init__(self):
        self._x = 1;
        self.y = 2;

class MyChild(MyParent):
    def some_method(self):
        return self._x    # Ok, since accessed from a child class

class AnotherClass:
    def some_method(self, instance_of_my_child):
        return instance_of_my_child._x   # Would be flagged as AnotherClass is not
                                         # a child class of MyParent
                   nvim.types, nvim._decode, nvim._err_cb)
class MyParent:
    def __init__(self):
        self._x = 1;
        self.y = 2;

class MyChild(MyParent):
    def some_method(self):
        return self._x    # Ok, since accessed from a child class

class AnotherClass:
    def some_method(self, instance_of_my_child):
        return instance_of_my_child._x   # Would be flagged as AnotherClass is not
                                         # a child class of MyParent

    def __init__(self, session, channel_id, metadata, types,
                 decode=False, err_cb=None):
        """Initialize a new Nvim instance. This method is module-private."""
        self._session = session
        self.channel_id = channel_id
        self.metadata = metadata
        version = metadata.get("version", {"api_level": 0})
        self.version = Version(**version)
        self.types = types
        self.api = RemoteApi(self, 'nvim_')
        self.vars = RemoteMap(self, 'nvim_get_var', 'nvim_set_var')
        self.vvars = RemoteMap(self, 'nvim_get_vvar', None)
        self.options = RemoteMap(self, 'nvim_get_option', 'nvim_set_option')
        self.buffers = Buffers(self)
        self.windows = RemoteSequence(self, 'nvim_list_wins')
        self.tabpages = RemoteSequence(self, 'nvim_list_tabpages')
        self.current = Current(self)
        self.session = CompatibilitySession(self)
        self.funcs = Funcs(self)
        self.error = NvimError
        self._decode = decode
        self._err_cb = err_cb

    def _from_nvim(self, obj, decode=None):
        if decode is None:
            decode = self._decode
        if type(obj) is ExtType:
            cls = self.types[obj.code]
            return cls(self, (obj.code, obj.data))
        if decode:
            obj = decode_if_bytes(obj, decode)
        return obj

    def _to_nvim(self, obj):
class Foo:
    def some_method(self, x, y):
        return x + y;
        if isinstance(obj, Remote):
            return ExtType(*obj.code_data)
        return obj

    def request(self, name, *args, **kwargs):
        r"""Send an API request or notification to nvim.

        It is rarely needed to call this function directly, as most API
        functions have python wrapper functions. The `api` object can
        be also be used to call API functions as methods:

            vim.api.err_write('ERROR\n', async=True)
            vim.current.buffer.api.get_mark('.')

        is equivalent to

            vim.request('nvim_err_write', 'ERROR\n', async=True)
            vim.request('nvim_buf_get_mark', vim.current.buffer, '.')


        Normally a blocking request will be sent.  If the `async` flag is
        present and True, a asynchronous notification is sent instead. This
        will never block, and the return value or error is ignored.
        """
        decode = kwargs.pop('decode', self._decode)
        args = walk(self._to_nvim, args)
        res = self._session.request(name, *args, **kwargs)
        return walk(self._from_nvim, res, decode=decode)

    def next_message(self):
        """Block until a message(request or notification) is available.

        If any messages were previously enqueued, return the first in queue.
        If not, run the event loop until one is received.
        """
        msg = self._session.next_message()
        if msg:
            return walk(self._from_nvim, msg)

    def run_loop(self, request_cb, notification_cb,
                 setup_cb=None, err_cb=None):
        """Run the event loop to receive requests and notifications from Nvim.

        This should not be called from a plugin running in the host, which
        already runs the loop and dispatches events to plugins.
        """
        if err_cb is None:
            err_cb = sys.stderr.write
        self._err_cb = err_cb

        def filter_request_cb(name, args):
            name = self._from_nvim(name)
            args = walk(self._from_nvim, args)
            try:
                result = request_cb(name, args)
            except Exception:
                msg = ("error caught in request handler '{} {}'\n{}\n\n"
                       .format(name, args, format_exc_skip(1)))
                self._err_cb(msg)
                raise
            return walk(self._to_nvim, result)

        def filter_notification_cb(name, args):
            name = self._from_nvim(name)
            args = walk(self._from_nvim, args)
            try:
                notification_cb(name, args)
            except Exception:
                msg = ("error caught in notification handler '{} {}'\n{}\n\n"
                       .format(name, args, format_exc_skip(1)))
                self._err_cb(msg)
                raise

        self._session.run(filter_request_cb, filter_notification_cb, setup_cb)

    def stop_loop(self):
        """Stop the event loop being started with `run_loop`."""
        self._session.stop()

    def close(self):
        """Close the nvim session and release its resources."""
        self._session.close()

    def __enter__(self):
        """Enter nvim session as a context manager."""
        return self

    def __exit__(self, *exc_info):
        """Exict nvim session as context manager.

        Closes the event loop.
        """
        self.close()

    def with_decode(self, decode=True):
        """Initialize a new Nvim instance."""
        return Nvim(self._session, self.channel_id,
                    self.metadata, self.types, decode, self._err_cb)

    def ui_attach(self, width, height, rgb):
        """Register as a remote UI.

        After this method is called, the client will receive redraw
        notifications.
        """
        return self.request('ui_attach', width, height, rgb)

    def ui_detach(self):
        """Unregister as a remote UI."""
        return self.request('ui_detach')

    def ui_try_resize(self, width, height):
        """Notify nvim that the client window has resized.

        If possible, nvim will send a redraw request to resize.
        """
        return self.request('ui_try_resize', width, height)

    def subscribe(self, event):
        """Subscribe to a Nvim event."""
        return self.request('nvim_subscribe', event)

    def unsubscribe(self, event):
        """Unsubscribe to a Nvim event."""
        return self.request('nvim_unsubscribe', event)

    def command(self, string, **kwargs):
        """Execute a single ex command."""
        return self.request('nvim_command', string, **kwargs)

    def command_output(self, string):
        """Execute a single ex command and return the output."""
        return self.request('nvim_command_output', string)

    def eval(self, string, **kwargs):
        """Evaluate a vimscript expression."""
        return self.request('nvim_eval', string, **kwargs)

    def call(self, name, *args, **kwargs):
        """Call a vimscript function."""
        return self.request('nvim_call_function', name, args, **kwargs)

    def strwidth(self, string):
        """Return the number of display cells `string` occupies.

        Tab is counted as one cell.
        """
        return self.request('nvim_strwidth', string)

    def list_runtime_paths(self):
        """Return a list of paths contained in the 'runtimepath' option."""
        return self.request('nvim_list_runtime_paths')

    def foreach_rtp(self, cb):
        """Invoke `cb` for each path in 'runtimepath'.

        Call the given callable for each path in 'runtimepath' until either
        callable returns something but None, the exception is raised or there
        are no longer paths. If stopped in case callable returned non-None,
        vim.foreach_rtp function returns the value returned by callable.
        """
        for path in self.request('nvim_list_runtime_paths'):
            try:
                if cb(path) is not None:
                    break
            except Exception:

                break

    def chdir(self, dir_path):
        """Run os.chdir, then all appropriate vim stuff."""
        os_chdir(dir_path)
        return self.request('nvim_set_current_dir', dir_path)

    def feedkeys(self, keys, options='', escape_csi=True):
        """Push `keys` to Nvim user input buffer.

        Options can be a string with the following character flags:
        - 'm': Remap keys. This is default.
        - 'n': Do not remap keys.
        - 't': Handle keys as if typed; otherwise they are handled as if coming
               from a mapping. This matters for undo, opening folds, etc.
        """
        return self.request('nvim_feedkeys', keys, options, escape_csi)

    def input(self, bytes):

        """Push `bytes` to Nvim low level input buffer.

        Unlike `feedkeys()`, this uses the lowest level input buffer and the
        call is not deferred. It returns the number of bytes actually
        written(which can be less than what was requested if the buffer is
        full).
        """
        return self.request('nvim_input', bytes)

    def replace_termcodes(self, string, from_part=False, do_lt=True,
                          special=True):
        r"""Replace any terminal code strings by byte sequences.

        The returned sequences are Nvim's internal representation of keys,
        for example:

        <esc> -> '\x1b'
        <cr>  -> '\r'
        <c-l> -> '\x0c'
        <up>  -> '\x80ku'

        The returned sequences can be used as input to `feedkeys`.
        """
        return self.request('nvim_replace_termcodes', string,
                            from_part, do_lt, special)

    def out_write(self, msg, **kwargs):
        """Print `msg` as a normal message."""
        return self.request('nvim_out_write', msg, **kwargs)

    def err_write(self, msg, **kwargs):
        """Print `msg` as an error message."""
        return self.request('nvim_err_write', msg, **kwargs)

    def quit(self, quit_command='qa!'):
        """Send a quit command to Nvim.

        By default, the quit command is 'qa!' which will make Nvim quit without
        saving anything.
        """
        try:
            self.command(quit_command)
        except IOError:
try:
    raises_exception()
except:  # Could be removed
    pass
            # sending a quit command will raise an IOError because the
            # connection is closed before a response is received. Safe to
            # ignore it.
            pass

    def new_highlight_source(self):
        """Return new src_id for use with Buffer.add_highlight."""
        return self.current.buffer.add_highlight("", 0, src_id=0)

    def async_call(self, fn, *args, **kwargs):
        """Schedule `fn` to be called by the event loop soon.

        This function is thread-safe, and is the only way code not
        on the main thread could interact with nvim api objects.

        This function can also be called in a synchronous
        event handler, just before it returns, to defer execution
        that shouldn't block neovim.
        """
        call_point = ''.join(format_stack(None, 5)[:-1])

        def handler():
            try:
                fn(*args, **kwargs)
            except Exception as err:
                msg = ("error caught while executing async callback:\n"
                       "{!r}\n{}\n \nthe call was requested at\n{}"
                       .format(err, format_exc_skip(1), call_point))
                self._err_cb(msg)
                raise
        self._session.threadsafe_call(handler)


class Buffers(object):

    """Remote NVim buffers.

    Currently the interface for interacting with remote NVim buffers is the
    `nvim_list_bufs` msgpack-rpc function. Most methods fetch the list of
    buffers from NVim.

    Conforms to *python-buffers*.
    """

    def __init__(self, nvim):
        """Initialize a Buffers object with Nvim object `nvim`."""
        self._fetch_buffers = nvim.api.list_bufs

    def __len__(self):
        """Return the count of buffers."""
        return len(self._fetch_buffers())

    def __getitem__(self, number):
        """Return the Buffer object matching buffer number `number`."""
        for b in self._fetch_buffers():
            if b.number == number:
                return b
        raise KeyError(number)

    def __contains__(self, b):
        """Return whether Buffer `b` is a known valid buffer."""
        return isinstance(b, Buffer) and b.valid

    def __iter__(self):
        """Return an iterator over the list of buffers."""
        return iter(self._fetch_buffers())


class CompatibilitySession(object):

    """Helper class for API compatibility."""

    def __init__(self, nvim):
        self.threadsafe_call = nvim.async_call


class Current(object):

    """Helper class for emulating vim.current from python-vim."""

    def __init__(self, session):
        self._session = session
        self.range = None

    @property
    def line(self):
        return self._session.request('nvim_get_current_line')

    @line.setter
    def line(self, line):
        return self._session.request('nvim_set_current_line', line)

    @property
    def buffer(self):
        return self._session.request('nvim_get_current_buf')

    @buffer.setter
    def buffer(self, buffer):
        return self._session.request('nvim_set_current_buf', buffer)

    @property
    def window(self):
        return self._session.request('nvim_get_current_win')

    @window.setter
    def window(self, window):
        return self._session.request('nvim_set_current_win', window)

    @property
    def tabpage(self):
        return self._session.request('nvim_get_current_tabpage')

    @tabpage.setter
    def tabpage(self, tabpage):
        return self._session.request('nvim_set_current_tabpage', tabpage)


class Funcs(object):

    """Helper class for functional vimscript interface."""

    def __init__(self, nvim):
        self._nvim = nvim

    def __getattr__(self, name):
        return partial(self._nvim.call, name)


class NvimError(Exception):
    pass


Pull Request — master (#303)

Nvim.exit() A

Complexity

Size

Duplication

Code Coverage

Importance

1. Missing Dependencies

2. Missing init.py files

1		"""Main Nvim interface."""
2	5	import os
3	5	import sys
4	5	from functools import partial
5		from traceback import format_stack
6	5
7		from msgpack import ExtType
		0 ignored issues – show Configuration introduced 2015-12-02 06:47 UTC by Report Bug Copy Issue Report The import `msgpack` could not be resolved. This can be caused by one of the following: 1. Missing Dependencies This error could indicate a configuration issue of Pylint. Make sure that your libraries are available by adding the necessary commands. # .scrutinizer.yml before_commands: - sudo pip install abc # Python2 - sudo pip3 install abc # Python3 Tip: We are currently not using virtualenv to run pylint, when installing your modules make sure to use the command for the correct version. 2. Missing __init__.py files This error could also result from missing `__init__.py` files in your module folders. Make sure that you place one file in each sub-folder. Loading history...
8	5
9		from .buffer import Buffer
10	5	from .common import (Remote, RemoteApi, RemoteMap, RemoteSequence,
11	5	decode_if_bytes, walk)
12		from .tabpage import Tabpage
13	5	from .window import Window
14	5	from ..compat import IS_PYTHON3
15	5	from ..util import Version, format_exc_skip
16	5
17		__all__ = ('Nvim')
18	5
19
20		os_chdir = os.chdir
21	5
22
23		class Nvim(object):
24	5
25		"""Class that represents a remote Nvim instance.
26
27		This class is main entry point to Nvim remote API, it is a wrapper
28		around Session instances.
29
30		The constructor of this class must not be called directly. Instead, the
31		`from_session` class method should be used to create the first instance
32		from a raw `Session` instance.
33
34		Subsequent instances for the same session can be created by calling the
35		`with_decode` instance method to change the decoding behavior or
36		`SubClass.from_nvim(nvim)` where `SubClass` is a subclass of `Nvim`, which
37		is useful for having multiple `Nvim` objects that behave differently
38		without one affecting the other.
39		"""
40
41		@classmethod
42	5	def from_session(cls, session):
43		"""Create a new Nvim instance for a Session instance.
44
45		This method must be called to create the first Nvim instance, since it
46		queries Nvim metadata for type information and sets a SessionHook for
47		creating specialized objects from Nvim remote handles.
48		"""
49		session.error_wrapper = lambda e: NvimError(e[1])
50	5	channel_id, metadata = session.request(b'vim_get_api_info')
51	5
52		if IS_PYTHON3:
53	5	# decode all metadata strings for python3
54		metadata = walk(decode_if_bytes, metadata)
55	5
56		types = {
57	5	metadata['types']['Buffer']['id']: Buffer,
58		metadata['types']['Window']['id']: Window,
59		metadata['types']['Tabpage']['id']: Tabpage,
60		}
61
62		return cls(session, channel_id, metadata, types)
63	5
64		@classmethod
65	5	def from_nvim(cls, nvim):
66		"""Create a new Nvim instance from an existing instance."""
67		return cls(nvim._session, nvim.channel_id, nvim.metadata,
		0 ignored issues – show Coding Style Best Practice introduced 2016-03-20 16:11 UTC by Report Bug Copy Issue Report It seems like `_session` was declared protected and should not be accessed from this context. Prefixing a member variable `_` is usually regarded as the equivalent of declaring it with protected visibility that exists in other languages. Consequentially, such a member should only be accessed from the same class or a child class: class MyParent: def __init__(self): self._x = 1; self.y = 2; class MyChild(MyParent): def some_method(self): return self._x # Ok, since accessed from a child class class AnotherClass: def some_method(self, instance_of_my_child): return instance_of_my_child._x # Would be flagged as AnotherClass is not # a child class of MyParent Loading history...
68		nvim.types, nvim._decode, nvim._err_cb)
		0 ignored issues – show Coding Style Best Practice introduced 2016-03-24 17:40 UTC by Report Bug Copy Issue Report It seems like `_decode` was declared protected and should not be accessed from this context. Prefixing a member variable `_` is usually regarded as the equivalent of declaring it with protected visibility that exists in other languages. Consequentially, such a member should only be accessed from the same class or a child class: class MyParent: def __init__(self): self._x = 1; self.y = 2; class MyChild(MyParent): def some_method(self): return self._x # Ok, since accessed from a child class class AnotherClass: def some_method(self, instance_of_my_child): return instance_of_my_child._x # Would be flagged as AnotherClass is not # a child class of MyParent Loading history... Coding Style Best Practice introduced 2016-03-20 11:50 UTC by Report Bug Copy Issue Report It seems like `_err_cb` was declared protected and should not be accessed from this context. Prefixing a member variable `_` is usually regarded as the equivalent of declaring it with protected visibility that exists in other languages. Consequentially, such a member should only be accessed from the same class or a child class: class MyParent: def __init__(self): self._x = 1; self.y = 2; class MyChild(MyParent): def some_method(self): return self._x # Ok, since accessed from a child class class AnotherClass: def some_method(self, instance_of_my_child): return instance_of_my_child._x # Would be flagged as AnotherClass is not # a child class of MyParent Loading history...
69
70		def __init__(self, session, channel_id, metadata, types,
71	5	decode=False, err_cb=None):
72		"""Initialize a new Nvim instance. This method is module-private."""
73		self._session = session
74	5	self.channel_id = channel_id
75	5	self.metadata = metadata
76	5	version = metadata.get("version", {"api_level": 0})
77	5	self.version = Version(**version)
78	5	self.types = types
79	5	self.api = RemoteApi(self, 'nvim_')
80	5	self.vars = RemoteMap(self, 'nvim_get_var', 'nvim_set_var')
81	5	self.vvars = RemoteMap(self, 'nvim_get_vvar', None)
82	5	self.options = RemoteMap(self, 'nvim_get_option', 'nvim_set_option')
83	5	self.buffers = Buffers(self)
84	5	self.windows = RemoteSequence(self, 'nvim_list_wins')
85	5	self.tabpages = RemoteSequence(self, 'nvim_list_tabpages')
86	5	self.current = Current(self)
87	5	self.session = CompatibilitySession(self)
88	5	self.funcs = Funcs(self)
89	5	self.error = NvimError
90	5	self._decode = decode
91	5	self._err_cb = err_cb
92	5
93		def _from_nvim(self, obj, decode=None):
94	5	if decode is None:
95	5	decode = self._decode
96	5	if type(obj) is ExtType:
97	5	cls = self.types[obj.code]
98	5	return cls(self, (obj.code, obj.data))
99	5	if decode:
100	5	obj = decode_if_bytes(obj, decode)
101	3	return obj
102	5
103		def _to_nvim(self, obj):
		0 ignored issues – show Coding Style introduced 2016-03-06 13:35 UTC by Report Bug Copy Issue Report This method could be written as a function/class method. If a method does not access any attributes of the class, it could also be implemented as a function or static method. This can help improve readability. For example class Foo: def some_method(self, x, y): return x + y; could be written as class Foo: @classmethod def some_method(cls, x, y): return x + y; Loading history...
104	5	if isinstance(obj, Remote):
105	5	return ExtType(*obj.code_data)
106	5	return obj
107	5
108		def request(self, name, args, *kwargs):
109	5	r"""Send an API request or notification to nvim.
110
111		It is rarely needed to call this function directly, as most API
112		functions have python wrapper functions. The `api` object can
113		be also be used to call API functions as methods:
114
115		vim.api.err_write('ERROR\n', async=True)
116		vim.current.buffer.api.get_mark('.')
117
118		is equivalent to
119
120		vim.request('nvim_err_write', 'ERROR\n', async=True)
121		vim.request('nvim_buf_get_mark', vim.current.buffer, '.')
122
123
124		Normally a blocking request will be sent. If the `async` flag is
125		present and True, a asynchronous notification is sent instead. This
126		will never block, and the return value or error is ignored.
127		"""
128		decode = kwargs.pop('decode', self._decode)
129	5	args = walk(self._to_nvim, args)
130	5	res = self._session.request(name, args, *kwargs)
131	5	return walk(self._from_nvim, res, decode=decode)
132	5
133		def next_message(self):
134	5	"""Block until a message(request or notification) is available.
135
136		If any messages were previously enqueued, return the first in queue.
137		If not, run the event loop until one is received.
138		"""
139		msg = self._session.next_message()
140	5	if msg:
141	5	return walk(self._from_nvim, msg)
142	5
143		def run_loop(self, request_cb, notification_cb,
144	5	setup_cb=None, err_cb=None):
145		"""Run the event loop to receive requests and notifications from Nvim.
146
147		This should not be called from a plugin running in the host, which
148		already runs the loop and dispatches events to plugins.
149		"""
150		if err_cb is None:
151	5	err_cb = sys.stderr.write
152	5	self._err_cb = err_cb
153	5
154		def filter_request_cb(name, args):
155	5	name = self._from_nvim(name)
156	5	args = walk(self._from_nvim, args)
157	5	try:
158	5	result = request_cb(name, args)
159	5	except Exception:
160		msg = ("error caught in request handler '{} {}'\n{}\n\n"
161		.format(name, args, format_exc_skip(1)))
162		self._err_cb(msg)
163		raise
164		return walk(self._to_nvim, result)
165	5
166		def filter_notification_cb(name, args):
167	5	name = self._from_nvim(name)
168		args = walk(self._from_nvim, args)
169		try:
170		notification_cb(name, args)
171		except Exception:
172		msg = ("error caught in notification handler '{} {}'\n{}\n\n"
173		.format(name, args, format_exc_skip(1)))
174		self._err_cb(msg)
175		raise
176
177		self._session.run(filter_request_cb, filter_notification_cb, setup_cb)
178	5
179		def stop_loop(self):
180	5	"""Stop the event loop being started with `run_loop`."""
181		self._session.stop()
182	5
183		def close(self):
184	5	"""Close the nvim session and release its resources."""
185		self._session.close()
186	5
187		def __enter__(self):
188		"""Enter nvim session as a context manager."""
189	5	return self
190
191		def __exit__(self, *exc_info):
192		"""Exict nvim session as context manager.
193
194		Closes the event loop.
195		"""
196		self.close()
197	5
198		def with_decode(self, decode=True):
199		"""Initialize a new Nvim instance."""
200		return Nvim(self._session, self.channel_id,
201	5	self.metadata, self.types, decode, self._err_cb)
202
203		def ui_attach(self, width, height, rgb):
204		"""Register as a remote UI.
205
206		After this method is called, the client will receive redraw
207		notifications.
208	5	"""
209		return self.request('ui_attach', width, height, rgb)
210	5
211		def ui_detach(self):
212	5	"""Unregister as a remote UI."""
213		return self.request('ui_detach')
214	5
215		def ui_try_resize(self, width, height):
216	5	"""Notify nvim that the client window has resized.
217
218	5	If possible, nvim will send a redraw request to resize.
219		"""
220	5	return self.request('ui_try_resize', width, height)
221
222		def subscribe(self, event):
223		"""Subscribe to a Nvim event."""
224	5	return self.request('nvim_subscribe', event)
225
226	5	def unsubscribe(self, event):
227		"""Unsubscribe to a Nvim event."""
228	5	return self.request('nvim_unsubscribe', event)
229
230	5	def command(self, string, **kwargs):
231		"""Execute a single ex command."""
232	5	return self.request('nvim_command', string, **kwargs)
233
234		def command_output(self, string):
235		"""Execute a single ex command and return the output."""
236		return self.request('nvim_command_output', string)
237	5
238		def eval(self, string, **kwargs):
239	5	"""Evaluate a vimscript expression."""
240		return self.request('nvim_eval', string, **kwargs)
241
242		def call(self, name, args, *kwargs):
243	5	"""Call a vimscript function."""
244		return self.request('nvim_call_function', name, args, **kwargs)
245
246		def strwidth(self, string):
247		"""Return the number of display cells `string` occupies.
248
249		Tab is counted as one cell.
250		"""
251		return self.request('nvim_strwidth', string)
252
253		def list_runtime_paths(self):
254		"""Return a list of paths contained in the 'runtimepath' option."""
255		return self.request('nvim_list_runtime_paths')
256
257		def foreach_rtp(self, cb):
258	5	"""Invoke `cb` for each path in 'runtimepath'.
259
260	5	Call the given callable for each path in 'runtimepath' until either
261	5	callable returns something but None, the exception is raised or there
262		are no longer paths. If stopped in case callable returned non-None,
263	5	vim.foreach_rtp function returns the value returned by callable.
264		"""
265		for path in self.request('nvim_list_runtime_paths'):
266		try:
267		if cb(path) is not None:
268		break
269		except Exception:
		0 ignored issues – show Best Practice introduced 2015-12-02 06:47 UTC by Report Bug Copy Issue Report Catching very general exceptions such as `Exception` is usually not recommended. Generally, you would want to handle very specific errors in the exception handler. This ensure that you do not hide other types of errors which should be fixed. So, unless you specifically plan to handle any error, consider adding a more specific exception. Loading history...
270		break
271
272		def chdir(self, dir_path):
273		"""Run os.chdir, then all appropriate vim stuff."""
274	5	os_chdir(dir_path)
275		return self.request('nvim_set_current_dir', dir_path)
276
277		def feedkeys(self, keys, options='', escape_csi=True):
278		"""Push `keys` to Nvim user input buffer.
279
280		Options can be a string with the following character flags:
281		- 'm': Remap keys. This is default.
282	5	- 'n': Do not remap keys.
283		- 't': Handle keys as if typed; otherwise they are handled as if coming
284	5	from a mapping. This matters for undo, opening folds, etc.
285		"""
286		return self.request('nvim_feedkeys', keys, options, escape_csi)
287
288		def input(self, bytes):
		0 ignored issues – show Bug Best Practice introduced 2015-12-02 06:47 UTC by Report Bug Copy Issue Report This seems to re-define the built-in `bytes`. It is generally discouraged to redefine built-ins as this makes code very hard to read. Loading history...
289		"""Push `bytes` to Nvim low level input buffer.
290
291		Unlike `feedkeys()`, this uses the lowest level input buffer and the
292		call is not deferred. It returns the number of bytes actually
293		written(which can be less than what was requested if the buffer is
294		full).
295		"""
296		return self.request('nvim_input', bytes)
297
298		def replace_termcodes(self, string, from_part=False, do_lt=True,
299		special=True):
300		r"""Replace any terminal code strings by byte sequences.
301	5
302		The returned sequences are Nvim's internal representation of keys,
303		for example:
304
305	5	<esc> -> '\x1b'
306		<cr> -> '\r'
307	2	<c-l> -> '\x0c'
308		<up> -> '\x80ku'
309	5
310		The returned sequences can be used as input to `feedkeys`.
311		"""
312		return self.request('nvim_replace_termcodes', string,
313		from_part, do_lt, special)
314
315		def out_write(self, msg, **kwargs):
316		"""Print `msg` as a normal message."""
317		return self.request('nvim_out_write', msg, **kwargs)
318
319		def err_write(self, msg, **kwargs):
320		"""Print `msg` as an error message."""
321		return self.request('nvim_err_write', msg, **kwargs)
322
323	5	def quit(self, quit_command='qa!'):
324		"""Send a quit command to Nvim.
325
326		By default, the quit command is 'qa!' which will make Nvim quit without
327	5	saving anything.
328		"""
329		try:
330		self.command(quit_command)
331		except IOError:
		0 ignored issues – show Unused Code introduced 2015-12-02 06:47 UTC by Report Bug Copy Issue Report This except handler seems to be unused and could be removed. Except handlers which only contain `pass` and do not have an `else` clause can usually simply be removed: try: raises_exception() except: # Could be removed pass Loading history...
332		# sending a quit command will raise an IOError because the
333		# connection is closed before a response is received. Safe to
334		# ignore it.
335		pass
336
337	5	def new_highlight_source(self):
338		"""Return new src_id for use with Buffer.add_highlight."""
339	5	return self.current.buffer.add_highlight("", 0, src_id=0)
340	5
341	5	def async_call(self, fn, args, *kwargs):
342		"""Schedule `fn` to be called by the event loop soon.
343	1
344		This function is thread-safe, and is the only way code not
345		on the main thread could interact with nvim api objects.
346	1
347		This function can also be called in a synchronous
348	5	event handler, just before it returns, to defer execution
349		that shouldn't block neovim.
350		"""
351	5	call_point = ''.join(format_stack(None, 5)[:-1])
352
353		def handler():
354		try:
355		fn(args, *kwargs)
356		except Exception as err:
357		msg = ("error caught while executing async callback:\n"
358		"{!r}\n{}\n \nthe call was requested at\n{}"
359		.format(err, format_exc_skip(1), call_point))
360		self._err_cb(msg)
361		raise
362	5	self._session.threadsafe_call(handler)
363
364	5
365		class Buffers(object):
366	5
367		"""Remote NVim buffers.
368	5
369		Currently the interface for interacting with remote NVim buffers is the
370	5	`nvim_list_bufs` msgpack-rpc function. Most methods fetch the list of
371		buffers from NVim.
372	5
373	5	Conforms to python-buffers.
374	5	"""
375
376		def __init__(self, nvim):
377	5	"""Initialize a Buffers object with Nvim object `nvim`."""
378		self._fetch_buffers = nvim.api.list_bufs
379	5
380		def __len__(self):
381	5	"""Return the count of buffers."""
382		return len(self._fetch_buffers())
383	5
384		def __getitem__(self, number):
385		"""Return the Buffer object matching buffer number `number`."""
386	5	for b in self._fetch_buffers():
387		if b.number == number:
388		return b
389		raise KeyError(number)
390	5
391	5	def __contains__(self, b):
392		"""Return whether Buffer `b` is a known valid buffer."""
393		return isinstance(b, Buffer) and b.valid
394	5
395		def __iter__(self):
396		"""Return an iterator over the list of buffers."""
397		return iter(self._fetch_buffers())
398	5
399	5
400	5	class CompatibilitySession(object):
401
402	5	"""Helper class for API compatibility."""
403
404	5	def __init__(self, nvim):
405		self.threadsafe_call = nvim.async_call
406	5
407
408	5	class Current(object):
409
410	5	"""Helper class for emulating vim.current from python-vim."""
411
412	5	def __init__(self, session):
413		self._session = session
414	5	self.range = None
415
416	5	@property
417		def line(self):
418	5	return self._session.request('nvim_get_current_line')
419
420	5	@line.setter
421		def line(self, line):
422	5	return self._session.request('nvim_set_current_line', line)
423
424	5	@property
425		def buffer(self):
426	5	return self._session.request('nvim_get_current_buf')
427
428	5	@buffer.setter
429		def buffer(self, buffer):
430	5	return self._session.request('nvim_set_current_buf', buffer)
431
432	5	@property
433		def window(self):
434		return self._session.request('nvim_get_current_win')
435	5
436		@window.setter
437		def window(self, window):
438		return self._session.request('nvim_set_current_win', window)
439	5
440	5	@property
441		def tabpage(self):
442	5	return self._session.request('nvim_get_current_tabpage')
443	5
444		@tabpage.setter
445		def tabpage(self, tabpage):
446	5	return self._session.request('nvim_set_current_tabpage', tabpage)
447	5
448
449		class Funcs(object):
450
451		"""Helper class for functional vimscript interface."""
452
453		def __init__(self, nvim):
454		self._nvim = nvim
455
456		def __getattr__(self, name):
457		return partial(self._nvim.call, name)
458
459
460		class NvimError(Exception):
461		pass
462

neovim / python-client

Pull Request — master (#303)

Nvim.__exit__() A

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Nvim.exit() A

2. Missing init.py files