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https://github.com/kovidgoyal/calibre.git
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92fe190f63
One less possible cause of lifetime related crashes/leaks. Plus my custom solution has a nicer interface. It's slower but since communication between python and js is not a bottleneck...
61 lines
1.6 KiB
Plaintext
61 lines
1.6 KiB
Plaintext
# vim:fileencoding=utf-8
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# License: GPL v3 Copyright: 2018, Kovid Goyal <kovid at kovidgoyal.net>
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from __python__ import bound_methods, hash_literals
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special_title = '__SPECIAL_TITLE__'
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slots = {}
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def ping(suffix):
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document.title = special_title + suffix
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def signal():
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args = Array.from(arguments)
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to_python._queue_message({'type': 'signal', 'name': this, 'args': args})
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class ToPython:
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def __init__(self):
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self._messages = v'[]'
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self._last_ping_value = 0
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self._ping_timer_id = -1
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self._queue_message({'type': 'qt-ready'})
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def _ping(self):
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if self._ping_timer_id < 0:
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self._last_ping_value = 0 if self._last_ping_value else 1
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self._ping_timer_id = setTimeout(def():
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ping(self._last_ping_value)
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self._ping_timer_id = -1
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, 0)
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def _queue_message(self, msg):
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self._messages.push(msg)
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self._ping()
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def _register_signals(self, signals):
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for signal_name in signals:
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self[signal_name] = signal.bind(signal_name)
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def _poll(self):
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ans = self._messages
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self._messages = v'[]'
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return ans
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def _from_python(self, name, args):
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callback = slots[name]
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if callback:
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callback.apply(None, args)
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else:
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console.warn(f'Attempt to call non-existent python-to-js slot named: {name}')
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to_python = None # TODO: Implement this via message passing from sub-frames
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if window is window.top:
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window.python_comm = to_python = ToPython()
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def from_python(func):
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slots[func.name] = func
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