90 lines
2.8 KiB
C++
90 lines
2.8 KiB
C++
/*
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* Strawberry Music Player
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* This file was part of Clementine.
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* Copyright 2010, David Sansome <me@davidsansome.com>
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*
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* Strawberry is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Strawberry is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Strawberry. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef URLHANDLER_H
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#define URLHANDLER_H
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#include "config.h"
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#include <QIcon>
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#include <QObject>
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#include <QUrl>
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class UrlHandler : public QObject {
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Q_OBJECT
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public:
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explicit UrlHandler(QObject *parent = nullptr);
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// The URL scheme that this handler handles.
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virtual QString scheme() const = 0;
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virtual QIcon icon() const;
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// Returned by StartLoading() and LoadNext(), indicates what the player
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// should do when it wants to load a URL.
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struct LoadResult {
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enum Type {
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// There wasn't a track available, and the player should move on to the
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// next playlist item.
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NoMoreTracks,
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// There might be another track available but the handler needs to do some
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// work (eg. fetching a remote playlist) to find out. AsyncLoadComplete
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// will be emitted later with the same original_url.
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WillLoadAsynchronously,
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// There was a track available. Its url is in media_url.
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TrackAvailable,
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};
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LoadResult(const QUrl &original_url = QUrl(), Type type = NoMoreTracks, const QUrl &media_url = QUrl(), qint64 length_nanosec_ = -1);
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// The url that the playlist item has in Url().
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// Might be something unplayable like lastfm://...
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QUrl original_url_;
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Type type_;
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// The actual url to something that gstreamer can play.
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QUrl media_url_;
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// Track length, if we are able to get it only now
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qint64 length_nanosec_;
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};
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// Called by the Player when a song starts loading - gives the handler
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// a chance to do something clever to get a playable track.
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virtual LoadResult StartLoading(const QUrl &url) { return LoadResult(url); }
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// Called by the player when a song finishes - gives the handler a chance to
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// get another track to play.
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virtual LoadResult LoadNext(const QUrl &url) { return LoadResult(url); }
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// Functions to be warned when something happen to a track handled by UrlHandler.
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virtual void TrackAboutToEnd() {};
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virtual void TrackSkipped() {};
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signals:
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void AsyncLoadComplete(const UrlHandler::LoadResult &result);
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};
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#endif // URLHANDLER_H
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