mirror of
https://github.com/HenkKalkwater/harbour-sailfin.git
synced 2024-12-23 06:25:17 +00:00
Chris Josten
54235f298e
Besides MPRIS support, this also adds support for hasPrevious() and hasNext() in several parts to determine whether the player/playlist/shuffler has a previous or next item.
251 lines
9.9 KiB
XML
251 lines
9.9 KiB
XML
<?xml version="1.0" ?>
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<node name="/Playlists_Interface" xmlns:tp="http://telepathy.freedesktop.org/wiki/DbusSpec#extensions-v0">
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<interface name="org.mpris.MediaPlayer2.Playlists">
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<tp:added version="2.1" />
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<tp:docstring>
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<p>Provides access to the media player's playlists.</p>
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<p>
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Since D-Bus does not provide an easy way to check for what interfaces
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are exported on an object, clients should attempt to get one of the
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properties on this interface to see if it is implemented.
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</p>
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</tp:docstring>
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<tp:simple-type name="Playlist_Id" type="o" array-name="Playlist_Id_List">
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<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
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<p>Unique playlist identifier.</p>
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<tp:rationale>
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<p>
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Multiple playlists may have the same name.
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</p>
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<p>
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This is a D-Bus object id as that is the definitive way to have
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unique identifiers on D-Bus. It also allows for future optional
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expansions to the specification where tracks are exported to D-Bus
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with an interface similar to org.gnome.UPnP.MediaItem2.
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</p>
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</tp:rationale>
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</tp:docstring>
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</tp:simple-type>
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<tp:simple-type name="Uri" type="s" array-name="Uri_List">
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<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
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<p>A URI.</p>
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</tp:docstring>
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</tp:simple-type>
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<tp:struct name="Playlist" array-name="Playlist_List">
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<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
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<p>A data structure describing a playlist.</p>
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</tp:docstring>
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<tp:member type="o" tp:type="Playlist_Id" name="Id">
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<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
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<p>A unique identifier for the playlist.</p>
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<p>This should remain the same if the playlist is renamed.</p>
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</tp:docstring>
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</tp:member>
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<tp:member type="s" name="Name">
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<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
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<p>The name of the playlist, typically given by the user.</p>
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</tp:docstring>
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</tp:member>
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<tp:member type="s" tp:type="Uri" name="Icon">
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<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
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<p>The URI of an (optional) icon.</p>
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</tp:docstring>
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</tp:member>
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</tp:struct>
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<tp:struct name="Maybe_Playlist">
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<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
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<p>A data structure describing a playlist, or nothing.</p>
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<tp:rationale>
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<p>
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D-Bus does not (at the time of writing) support a MAYBE type,
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so we are forced to invent our own.
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</p>
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</tp:rationale>
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</tp:docstring>
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<tp:member type="b" name="Valid">
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<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
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<p>Whether this structure refers to a valid playlist.</p>
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</tp:docstring>
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</tp:member>
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<tp:member type="(oss)" tp:type="Playlist" name="Playlist">
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<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
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<p>The playlist, providing Valid is true, otherwise undefined.</p>
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<p>
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When constructing this type, it should be noted that the playlist
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ID must be a valid object path, or D-Bus implementations may reject
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it. This is true even when Valid is false. It is suggested that
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"/" is used as the playlist ID in this case.
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</p>
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</tp:docstring>
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</tp:member>
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</tp:struct>
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<tp:enum name="Playlist_Ordering" array-name="Playlist_Ordering_List" type="s">
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<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
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<p>Specifies the ordering of returned playlists.</p>
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</tp:docstring>
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<tp:enumvalue suffix="Alphabetical" value="Alphabetical">
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<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
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<p>Alphabetical ordering by name, ascending.</p>
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</tp:docstring>
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</tp:enumvalue>
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<tp:enumvalue suffix="CreationDate" value="Created">
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<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
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<p>Ordering by creation date, oldest first.</p>
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</tp:docstring>
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</tp:enumvalue>
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<tp:enumvalue suffix="ModifiedDate" value="Modified">
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<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
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<p>Ordering by last modified date, oldest first.</p>
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</tp:docstring>
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</tp:enumvalue>
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<tp:enumvalue suffix="LastPlayDate" value="Played">
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<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
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<p>Ordering by date of last playback, oldest first.</p>
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</tp:docstring>
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</tp:enumvalue>
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<tp:enumvalue suffix="UserDefined" value="User">
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<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
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<p>A user-defined ordering.</p>
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<tp:rationale>
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<p>
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Some media players may allow users to order playlists as they
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wish. This ordering allows playlists to be retreived in that
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order.
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</p>
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</tp:rationale>
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</tp:docstring>
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</tp:enumvalue>
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</tp:enum>
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<method name="ActivatePlaylist" tp:name-for-bindings="Activate_Playlist">
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<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
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<p>
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Starts playing the given playlist.
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</p>
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<p>
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Note that this must be implemented. If the media player does not
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allow clients to change the playlist, it should not implement this
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interface at all.
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</p>
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<p>
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It is up to the media player whether this completely replaces the
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current tracklist, or whether it is merely inserted into the
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tracklist and the first track starts. For example, if the media
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player is operating in a "jukebox" mode, it may just append the
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playlist to the list of upcoming tracks, and skip to the first
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track in the playlist.
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</p>
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</tp:docstring>
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<arg direction="in" name="PlaylistId" type="o">
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<tp:docstring>
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<p>The id of the playlist to activate.</p>
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</tp:docstring>
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</arg>
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</method>
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<method name="GetPlaylists" tp:name-for-bindings="Get_Playlists">
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<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
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<p>Gets a set of playlists.</p>
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</tp:docstring>
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<arg direction="in" name="Index" type="u">
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<tp:docstring>
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<p>The index of the first playlist to be fetched (according to the ordering).</p>
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</tp:docstring>
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</arg>
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<arg direction="in" name="MaxCount" type="u">
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<tp:docstring>
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<p>The maximum number of playlists to fetch.</p>
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</tp:docstring>
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</arg>
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<arg direction="in" name="Order" type="s" tp:type="Playlist_Ordering">
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<tp:docstring>
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<p>The ordering that should be used.</p>
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</tp:docstring>
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</arg>
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<arg direction="in" name="ReverseOrder" type="b">
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<tp:docstring>
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<p>Whether the order should be reversed.</p>
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</tp:docstring>
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</arg>
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<arg direction="out" name="Playlists" type="a(oss)" tp:type="Playlist[]">
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<tp:docstring>
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<p>A list of (at most MaxCount) playlists.</p>
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</tp:docstring>
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</arg>
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</method>
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<property name="PlaylistCount" type="u" tp:name-for-bindings="Playlist_Count" access="read">
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<annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="true"/>
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<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
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<p>
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The number of playlists available.
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</p>
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</tp:docstring>
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</property>
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<property name="Orderings" tp:name-for-bindings="Orderings" type="as" tp:type="Playlist_Ordering[]" access="read">
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<annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="true"/>
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<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
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<p>
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The available orderings. At least one must be offered.
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</p>
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<tp:rationale>
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<p>
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Media players may not have access to all the data required for some
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orderings. For example, creation times are not available on UNIX
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filesystems (don't let the ctime fool you!). On the other hand,
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clients should have some way to get the "most recent" playlists.
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</p>
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</tp:rationale>
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</tp:docstring>
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</property>
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<property name="ActivePlaylist" type="(b(oss))" tp:name-for-bindings="Active_Playlist" tp:type="Maybe_Playlist" access="read">
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<annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="true"/>
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<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
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<p>
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The currently-active playlist.
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</p>
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<p>
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If there is no currently-active playlist, the structure's Valid field
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will be false, and the Playlist details are undefined.
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</p>
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<p>
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Note that this may not have a value even after ActivatePlaylist is
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called with a valid playlist id as ActivatePlaylist implementations
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have the option of simply inserting the contents of the playlist into
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the current tracklist.
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</p>
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</tp:docstring>
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</property>
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<signal name="PlaylistChanged" tp:name-for-bindings="Playlist_Changed">
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<arg name="Playlist" type="(oss)" tp:type="Playlist">
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<tp:docstring>
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The playlist which details have changed.
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</tp:docstring>
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</arg>
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<tp:docstring xmlns="http://www.w3.org/1999/xhtml">
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<p>Indicates that either the Name or Icon attribute of a
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playlist has changed.
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</p>
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<p>Client implementations should be aware that this signal
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may not be implemented.
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</p>
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<tp:rationale>
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Without this signal, media players have no way to notify clients
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of a change in the attributes of a playlist other than the active one
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</tp:rationale>
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</tp:docstring>
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</signal>
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</interface>
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</node>
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<!-- vim:set sw=2 sts=2 et ft=xml: -->
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