480 lines
14 KiB
Python
480 lines
14 KiB
Python
from __future__ import unicode_literals
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import logging
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import random
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from mopidy.models import TlTrack
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from . import listener
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logger = logging.getLogger('mopidy.core')
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class TracklistController(object):
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pykka_traversable = True
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def __init__(self, core):
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self.core = core
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self._next_tlid = 0
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self._tl_tracks = []
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self._version = 0
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self._shuffled = []
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self._first_shuffle = True
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### Properties
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def get_tl_tracks(self):
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return self._tl_tracks[:]
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tl_tracks = property(get_tl_tracks)
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"""
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List of :class:`mopidy.models.TlTrack`.
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Read-only.
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"""
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def get_tracks(self):
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return [tl_track.track for tl_track in self._tl_tracks]
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tracks = property(get_tracks)
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"""
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List of :class:`mopidy.models.Track` in the tracklist.
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Read-only.
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"""
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def get_length(self):
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return len(self._tl_tracks)
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length = property(get_length)
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"""Length of the tracklist."""
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def get_version(self):
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return self._version
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def _increase_version(self):
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self._version += 1
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self.core.playback.on_tracklist_change()
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self._trigger_tracklist_changed()
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version = property(get_version)
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"""
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The tracklist version.
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Read-only. Integer which is increased every time the tracklist is changed.
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Is not reset before Mopidy is restarted.
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"""
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def get_consume(self):
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return getattr(self, '_consume', False)
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def set_consume(self, value):
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if self.get_consume() != value:
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self._trigger_options_changed()
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return setattr(self, '_consume', value)
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consume = property(get_consume, set_consume)
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"""
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:class:`True`
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Tracks are removed from the playlist when they have been played.
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:class:`False`
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Tracks are not removed from the playlist.
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"""
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def get_random(self):
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return getattr(self, '_random', False)
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def set_random(self, value):
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if self.get_random() != value:
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self._trigger_options_changed()
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return setattr(self, '_random', value)
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random = property(get_random, set_random)
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"""
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:class:`True`
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Tracks are selected at random from the playlist.
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:class:`False`
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Tracks are played in the order of the playlist.
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"""
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def get_repeat(self):
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return getattr(self, '_repeat', False)
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def set_repeat(self, value):
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if self.get_repeat() != value:
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self._trigger_options_changed()
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return setattr(self, '_repeat', value)
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repeat = property(get_repeat, set_repeat)
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"""
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:class:`True`
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The current playlist is played repeatedly. To repeat a single track,
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select both :attr:`repeat` and :attr:`single`.
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:class:`False`
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The current playlist is played once.
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"""
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def get_single(self):
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return getattr(self, '_single', False)
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def set_single(self, value):
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if self.get_single() != value:
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self._trigger_options_changed()
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return setattr(self, '_single', value)
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single = property(get_single, set_single)
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"""
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:class:`True`
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Playback is stopped after current song, unless in :attr:`repeat`
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mode.
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:class:`False`
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Playback continues after current song.
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"""
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def tracklist_position(self, tl_track):
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"""
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The position of the given track in the tracklist.
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"""
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if tl_track is None:
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return None
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try:
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return self.tl_tracks.index(tl_track)
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except ValueError:
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return None
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def eot_track(self, tl_track):
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"""
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The track that will be played after the given track.
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Not necessarily the same track as :meth:`next_track`.
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:param tl_track: The reference track
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:type tl_track: :class:`mopidy.models.TlTrack`
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"""
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# pylint: disable = R0911
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# Too many return statements
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if not self.tl_tracks:
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return None
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if self.random and not self._shuffled:
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if self.repeat or self._first_shuffle:
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logger.debug('Shuffling tracks')
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self._shuffled = self.tl_tracks
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random.shuffle(self._shuffled)
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self._first_shuffle = False
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if self.random and self._shuffled:
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return self._shuffled[0]
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if tl_track is None:
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return self.tl_tracks[0]
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position = self.tracklist_position(tl_track)
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if self.repeat and self.single:
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return self.tl_tracks[position]
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if self.repeat and not self.single:
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return self.tl_tracks[(position + 1) % len(self.tl_tracks)]
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try:
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return self.tl_tracks[position + 1]
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except IndexError:
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return None
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def next_track(self, tl_track):
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"""
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The track that will be played if calling
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:meth:`mopidy.core.PlaybackController.next()`.
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For normal playback this is the next track in the playlist. If repeat
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is enabled the next track can loop around the playlist. When random is
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enabled this should be a random track, all tracks should be played once
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before the list repeats.
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:param tl_track: The reference track
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:type tl_track: :class:`mopidy.models.TlTrack`
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"""
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if not self.tl_tracks:
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return None
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if self.random and not self._shuffled:
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if self.repeat or self._first_shuffle:
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logger.debug('Shuffling tracks')
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self._shuffled = self.tl_tracks
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random.shuffle(self._shuffled)
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self._first_shuffle = False
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if self.random and self._shuffled:
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return self._shuffled[0]
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if tl_track is None:
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return self.tl_tracks[0]
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position = self.tracklist_position(tl_track)
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if self.repeat:
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return self.tl_tracks[(position + 1) % len(self.tl_tracks)]
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try:
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return self.tl_tracks[position + 1]
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except IndexError:
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return None
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def previous_track(self, tl_track):
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"""
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Returns the track that will be played if calling
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:meth:`mopidy.core.PlaybackController.previous()`.
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A :class:`mopidy.models.TlTrack`.
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For normal playback this is the previous track in the playlist. If
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random and/or consume is enabled it should return the current track
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instead.
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:param tl_track: The reference track
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:type tl_track: :class:`mopidy.models.TlTrack`
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"""
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if self.repeat or self.consume or self.random:
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return tl_track
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position = self.tracklist_position(tl_track)
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if position in (None, 0):
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return None
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return self.tl_tracks[position - 1]
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def add(self, tracks=None, at_position=None, uri=None):
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"""
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Add the track or list of tracks to the tracklist.
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If ``uri`` is given instead of ``tracks``, the URI is looked up in the
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library and the resulting tracks are added to the tracklist.
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If ``at_position`` is given, the tracks placed at the given position in
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the tracklist. If ``at_position`` is not given, the tracks are appended
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to the end of the tracklist.
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Triggers the :meth:`mopidy.core.CoreListener.tracklist_changed` event.
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:param tracks: tracks to add
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:type tracks: list of :class:`mopidy.models.Track`
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:param at_position: position in tracklist to add track
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:type at_position: int or :class:`None`
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:param uri: URI for tracks to add
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:type uri: string
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:rtype: list of :class:`mopidy.models.TlTrack`
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"""
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assert tracks is not None or uri is not None, \
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'tracks or uri must be provided'
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if tracks is None and uri is not None:
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tracks = self.core.library.lookup(uri)
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tl_tracks = []
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for track in tracks:
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tl_track = TlTrack(self._next_tlid, track)
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self._next_tlid += 1
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if at_position is not None:
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self._tl_tracks.insert(at_position, tl_track)
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at_position += 1
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else:
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self._tl_tracks.append(tl_track)
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tl_tracks.append(tl_track)
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if tl_tracks:
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self._increase_version()
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return tl_tracks
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def clear(self):
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"""
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Clear the tracklist.
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Triggers the :meth:`mopidy.core.CoreListener.tracklist_changed` event.
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"""
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self._tl_tracks = []
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self._increase_version()
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def filter(self, criteria=None, **kwargs):
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"""
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Filter the tracklist by the given criterias.
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Examples::
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# Returns track with TLID 7 (tracklist ID)
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filter({'tlid': 7})
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filter(tlid=7)
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# Returns track with ID 1
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filter({'id': 1})
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filter(id=1)
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# Returns track with URI 'xyz'
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filter({'uri': 'xyz'})
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filter(uri='xyz')
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# Returns track with ID 1 and URI 'xyz'
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filter({'id': 1, 'uri': 'xyz'})
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filter(id=1, uri='xyz')
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:param criteria: on or more criteria to match by
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:type criteria: dict
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:rtype: list of :class:`mopidy.models.TlTrack`
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"""
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criteria = criteria or kwargs
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matches = self._tl_tracks
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for (key, value) in criteria.iteritems():
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if key == 'tlid':
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matches = filter(lambda ct: ct.tlid == value, matches)
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else:
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matches = filter(
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lambda ct: getattr(ct.track, key) == value, matches)
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return matches
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def index(self, tl_track):
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"""
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Get index of the given :class:`mopidy.models.TlTrack` in the tracklist.
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Raises :exc:`ValueError` if not found.
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:param tl_track: track to find the index of
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:type tl_track: :class:`mopidy.models.TlTrack`
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:rtype: int
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"""
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return self._tl_tracks.index(tl_track)
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def move(self, start, end, to_position):
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"""
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Move the tracks in the slice ``[start:end]`` to ``to_position``.
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Triggers the :meth:`mopidy.core.CoreListener.tracklist_changed` event.
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:param start: position of first track to move
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:type start: int
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:param end: position after last track to move
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:type end: int
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:param to_position: new position for the tracks
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:type to_position: int
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"""
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if start == end:
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end += 1
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tl_tracks = self._tl_tracks
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assert start < end, 'start must be smaller than end'
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assert start >= 0, 'start must be at least zero'
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assert end <= len(tl_tracks), \
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'end can not be larger than tracklist length'
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assert to_position >= 0, 'to_position must be at least zero'
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assert to_position <= len(tl_tracks), \
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'to_position can not be larger than tracklist length'
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new_tl_tracks = tl_tracks[:start] + tl_tracks[end:]
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for tl_track in tl_tracks[start:end]:
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new_tl_tracks.insert(to_position, tl_track)
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to_position += 1
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self._tl_tracks = new_tl_tracks
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self._increase_version()
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def remove(self, criteria=None, **kwargs):
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"""
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Remove the matching tracks from the tracklist.
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Uses :meth:`filter()` to lookup the tracks to remove.
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Triggers the :meth:`mopidy.core.CoreListener.tracklist_changed` event.
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:param criteria: on or more criteria to match by
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:type criteria: dict
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:rtype: list of :class:`mopidy.models.TlTrack` that was removed
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"""
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tl_tracks = self.filter(criteria, **kwargs)
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for tl_track in tl_tracks:
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position = self._tl_tracks.index(tl_track)
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del self._tl_tracks[position]
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self._increase_version()
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return tl_tracks
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def shuffle(self, start=None, end=None):
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"""
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Shuffles the entire tracklist. If ``start`` and ``end`` is given only
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shuffles the slice ``[start:end]``.
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Triggers the :meth:`mopidy.core.CoreListener.tracklist_changed` event.
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:param start: position of first track to shuffle
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:type start: int or :class:`None`
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:param end: position after last track to shuffle
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:type end: int or :class:`None`
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"""
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tl_tracks = self._tl_tracks
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if start is not None and end is not None:
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assert start < end, 'start must be smaller than end'
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if start is not None:
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assert start >= 0, 'start must be at least zero'
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if end is not None:
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assert end <= len(tl_tracks), 'end can not be larger than ' + \
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'tracklist length'
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before = tl_tracks[:start or 0]
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shuffled = tl_tracks[start:end]
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after = tl_tracks[end or len(tl_tracks):]
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random.shuffle(shuffled)
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self._tl_tracks = before + shuffled + after
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self._increase_version()
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def slice(self, start, end):
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"""
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Returns a slice of the tracklist, limited by the given start and end
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positions.
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:param start: position of first track to include in slice
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:type start: int
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:param end: position after last track to include in slice
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:type end: int
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:rtype: :class:`mopidy.models.TlTrack`
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"""
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return self._tl_tracks[start:end]
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def mark(self, what, tl_track):
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"""
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Marks the given track as specified. Currently supports::
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* `consumed` The track has been completely played.
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* `played` The track has been played, at least a piece of it.
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* `unplayable` The track is unplayable
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:param what: What to be marked as
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:type what: string
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:param tl_track: Track to mark
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:type tl_track: :class:`mopidy.models.TlTrack`
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:rtype: True if the track was actually removed from the tracklist
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"""
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if what == "consumed":
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if not self.consume:
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return False
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self.remove(tlid=tl_track.tlid)
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return True
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elif what == "played":
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if self.random and tl_track in self._shuffled:
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self._shuffled.remove(tl_track)
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elif what == "unplayable":
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if self.random and self._shuffled:
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self._shuffled.remove(tl_track)
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def _trigger_tracklist_changed(self):
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self._first_shuffle = True
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self._shuffled = []
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logger.debug('Triggering event: tracklist_changed()')
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listener.CoreListener.send('tracklist_changed')
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def _trigger_options_changed(self):
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logger.debug('Triggering options changed event')
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listener.CoreListener.send('options_changed')
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