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"""Event loop implementation that uses pyuv(libuv-python bindings).""" |
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import sys |
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from collections import deque |
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2 |
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import pyuv |
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from .base import BaseEventLoop |
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class UvEventLoop(BaseEventLoop): |
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"""`BaseEventLoop` subclass that uses `pvuv` as a backend.""" |
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def _init(self): |
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self._loop = pyuv.Loop() |
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self._async = pyuv.Async(self._loop, self._on_async) |
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self._connection_error = None |
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self._error_stream = None |
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self._callbacks = deque() |
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def _on_connect(self, stream, error): |
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self.stop() |
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if error: |
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msg = 'Cannot connect to {}: {}'.format( |
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self._connect_address, pyuv.errno.strerror(error)) |
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self._connection_error = IOError(msg) |
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return |
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self._read_stream = self._write_stream = stream |
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def _on_read(self, handle, data, error): |
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if error or not data: |
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msg = pyuv.errno.strerror(error) if error else 'EOF' |
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self._on_error(msg) |
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return |
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if handle == self._error_stream: |
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return |
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self._on_data(data) |
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def _on_write(self, handle, error): |
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if error: |
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msg = pyuv.errno.strerror(error) |
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self._on_error(msg) |
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def _on_exit(self, handle, exit_status, term_signal): |
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self._on_error('EOF') |
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def _disconnected(self, *args): |
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raise IOError('Not connected to Nvim') |
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def _connect_tcp(self, address, port): |
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stream = pyuv.TCP(self._loop) |
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self._connect_address = '{}:{}'.format(address, port) |
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stream.connect((address, port), self._on_connect) |
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def _connect_socket(self, path): |
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stream = pyuv.Pipe(self._loop) |
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self._connect_address = path |
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stream.connect(path, self._on_connect) |
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def _connect_stdio(self): |
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self._read_stream = pyuv.Pipe(self._loop) |
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self._read_stream.open(sys.stdin.fileno()) |
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self._write_stream = pyuv.Pipe(self._loop) |
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self._write_stream.open(sys.stdout.fileno()) |
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def _connect_child(self, argv): |
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self._write_stream = pyuv.Pipe(self._loop) |
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self._read_stream = pyuv.Pipe(self._loop) |
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self._error_stream = pyuv.Pipe(self._loop) |
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stdin = pyuv.StdIO(self._write_stream, |
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flags=pyuv.UV_CREATE_PIPE + pyuv.UV_READABLE_PIPE) |
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stdout = pyuv.StdIO(self._read_stream, |
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flags=pyuv.UV_CREATE_PIPE + pyuv.UV_WRITABLE_PIPE) |
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stderr = pyuv.StdIO(self._error_stream, |
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flags=pyuv.UV_CREATE_PIPE + pyuv.UV_WRITABLE_PIPE) |
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pyuv.Process.spawn(self._loop, |
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args=argv, |
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exit_callback=self._on_exit, |
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flags=pyuv.UV_PROCESS_WINDOWS_HIDE, |
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stdio=(stdin, stdout, stderr,)) |
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self._error_stream.start_read(self._on_read) |
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def _start_reading(self): |
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if self._transport_type in ['tcp', 'socket']: |
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self._loop.run() |
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if self._connection_error: |
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self.run = self.send = self._disconnected |
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raise self._connection_error |
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self._read_stream.start_read(self._on_read) |
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def _send(self, data): |
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self._write_stream.write(data, self._on_write) |
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def _run(self): |
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self._loop.run(pyuv.UV_RUN_DEFAULT) |
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def _stop(self): |
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self._loop.stop() |
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def _close(self): |
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pass |
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103
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def _threadsafe_call(self, fn): |
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self._callbacks.append(fn) |
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self._async.send() |
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def _on_async(self, handle): |
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while self._callbacks: |
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self._callbacks.popleft()() |
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111
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def _setup_signals(self, signals): |
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self._signal_handles = [] |
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def handler(h, signum): |
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self._on_signal(signum) |
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for signum in signals: |
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handle = pyuv.Signal(self._loop) |
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handle.start(handler, signum) |
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self._signal_handles.append(handle) |
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def _teardown_signals(self): |
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for handle in self._signal_handles: |
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handle.stop() |
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neovim /
pynvim
