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# -*- coding: utf-8 -*- |
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# ----------------------------------------------------------------------------- |
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# Copyright (c) 2015 Yann Lanthony |
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# Copyright (c) 2017-2018 Spyder Project Contributors |
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# |
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# Licensed under the terms of the MIT License |
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# (See LICENSE.txt for details) |
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# ----------------------------------------------------------------------------- |
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"""Contains the Qt implementation of the Watcher api.""" |
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# yapf: disable |
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from __future__ import absolute_import |
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# Third party imports |
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from watchdog.events import FileSystemEventHandler |
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from watchdog.observers import Observer |
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# Local imports |
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from qtsass.watchers.api import Watcher |
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# yapf: enable |
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class SourceChangedEventHandler(FileSystemEventHandler): |
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"""Source event hanlder.""" |
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def __init__(self, compile, callbacks): |
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"""Source event hanlder.""" |
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super(SourceChangedEventHandler, self).__init__() |
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self._compile = compile |
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self._callbacks = callbacks |
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def on_modified(self, event): |
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"""Override watchdog method to handle on file modification events.""" |
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css = self._compile() |
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for callback in self._callbacks: |
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callback(css) |
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class WatchdogWatcher(Watcher): |
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"""Watches a file or directory for changes and calls the provided compiler |
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whenever a change is detected. |
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""" |
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def setup(self): |
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self._callbacks = set() |
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self._handler = SourceChangedEventHandler( |
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self.compile, |
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self._callbacks |
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) |
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self._observer = Observer() |
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self._observer.schedule(self._handler, self._watch_dir, recursive=True) |
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def connect(self, fn): |
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self._callbacks.add(fn) |
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def disconnect(self, fn): |
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self._callbacks.discard(fn) |
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def start(self): |
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self._observer.start() |
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def stop(self): |
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self._observer.stop() |
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def join(self): |
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self._observer.join() |
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spyder-ide /
qtsass
