40 lines
1.6 KiB
Python
40 lines
1.6 KiB
Python
# Copyright 2023 (c) Anna Schumaker.
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"""A Playlist model configured for the Previous Tracks playlist."""
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from gi.repository import GObject
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from . import playlist
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from .. import db
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class Previous(playlist.Playlist):
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"""A Playlist configured for Previous Tracks."""
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can_go_forward = GObject.Property(type=bool, default=False)
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def __init__(self, sql: db.Connection, playlist: db.playlist.Playlist):
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"""Initialize the Previous Playlist object."""
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super().__init__(sql=sql, playlist=playlist)
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self.connect("notify::current-track", self.__notify_current_track)
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def __notify_current_track(self, plist: playlist.Playlist, param) -> None:
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current = self.current_track
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self.can_go_forward = current and current != self[0]
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def do_get_sort_key(self, trackid: int) -> float:
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"""Get the sort key for a given trackid."""
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track = self.sql.tracks.rows.get(trackid)
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return 0 if track is None else -track.laststarted.timestamp()
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def on_trackid_added(self, set: db.tracks.TrackidSet,
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trackid: int) -> None:
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"""Handle the TrackidSet::trackid-added signal."""
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super().on_trackid_added(set, trackid)
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self.playlist.current_trackid = self.trackids[0]
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self.notify("current-track")
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def previous_track(self) -> db.tracks.Track | None:
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"""Go backwards one Track."""
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if self.playlist is not None and len(self.trackids) > 0:
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if (index := self.index(self.current_track)) > 0:
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self.current_track = self[index - 1]
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return self.current_track
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