288 lines
9.1 KiB
JavaScript
288 lines
9.1 KiB
JavaScript
module.exports = Player
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var h = require('virtual-dom/h')
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var hyperx = require('hyperx')
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var hx = hyperx(h)
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// Shows a streaming video player. Standard features + Chromecast + Airplay
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function Player (state, dispatch) {
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// Show the video as large as will fit in the window, play immediately
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// If the video is on Chromecast or Airplay, show a title screen instead
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var showVideo = state.playing.location === 'local'
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return hx`
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<div
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class='player'
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onmousemove=${() => dispatch('mediaMouseMoved')}>
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${showVideo ? renderMedia(state, dispatch) : renderCastScreen(state, dispatch)}
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${renderPlayerControls(state, dispatch)}
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</div>
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`
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}
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function renderMedia (state, dispatch) {
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if (!state.server) return
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// Unfortunately, play/pause can't be done just by modifying HTML.
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// Instead, grab the DOM node and play/pause it if necessary
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var mediaType = state.playing.type /* 'audio' or 'video' */
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var mediaElement = document.querySelector(mediaType) /* get the <video> or <audio> tag */
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if (mediaElement !== null) {
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if (state.playing.isPaused && !mediaElement.paused) {
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mediaElement.pause()
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} else if (!state.playing.isPaused && mediaElement.paused) {
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mediaElement.play()
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}
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// When the user clicks or drags on the progress bar, jump to that position
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if (state.playing.jumpToTime) {
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mediaElement.currentTime = state.playing.jumpToTime
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state.playing.jumpToTime = null
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}
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state.playing.currentTime = mediaElement.currentTime
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state.playing.duration = mediaElement.duration
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}
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// Create the <audio> or <video> tag
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var mediaTag = hx`
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<div
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src='${state.server.localURL}'
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ondblclick=${() => dispatch('toggleFullScreen')}
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onloadedmetadata=${onLoadedMetadata}
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onended=${onEnded}
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onplay=${() => dispatch('mediaPlaying')}
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onpause=${() => dispatch('mediaPaused')}
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autoplay>
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</div>
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`
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mediaTag.tagName = mediaType
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// Show the media.
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// Video fills the window, centered with black bars if necessary
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// Audio gets a static poster image and a summary of the file metadata.
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var isAudio = mediaType === 'audio'
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var style = {
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backgroundImage: isAudio ? cssBackgroundImagePoster(state) : ''
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}
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return hx`
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<div
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class='letterbox'
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style=${style}
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onmousemove=${() => dispatch('mediaMouseMoved')}>
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${mediaTag}
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${renderAudioMetadata(state)}
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</div>
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`
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// As soon as the video loads enough to know the video dimensions, resize the window
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function onLoadedMetadata (e) {
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if (mediaType !== 'video') return
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var video = e.target
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var dimensions = {
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width: video.videoWidth,
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height: video.videoHeight
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}
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dispatch('setDimensions', dimensions)
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}
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// When the video completes, pause the video instead of looping
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function onEnded (e) {
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state.playing.isPaused = true
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}
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}
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function renderAudioMetadata (state) {
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if (!state.playing.audioInfo) return
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var info = state.playing.audioInfo
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// Get audio track info
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var title = info.title
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if (!title) {
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var torrentSummary = getPlayingTorrentSummary(state)
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title = torrentSummary.files[state.playing.fileIndex].name
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}
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var artist = info.artist && info.artist[0]
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var album = info.album
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if (album && info.year && !album.includes(info.year)) {
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album += ' (' + info.year + ')'
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}
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var track
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if (info.track && info.track.no && info.track.of) {
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track = info.track.no + ' of ' + info.track.of
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}
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// Show a small info box in the middle of the screen
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var elems = [hx`<div class='audio-title'><label></label>${title}</div>`]
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if (artist) elems.push(hx`<div class='audio-artist'><label>Artist</label>${artist}</div>`)
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if (album) elems.push(hx`<div class='audio-album'><label>Album</label>${album}</div>`)
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if (track) elems.push(hx`<div class='audio-track'><label>Track</label>${track}</div>`)
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return hx`<div class='audio-metadata'>${elems}</div>`
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}
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function renderCastScreen (state, dispatch) {
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var isChromecast = state.playing.location.startsWith('chromecast')
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var isAirplay = state.playing.location.startsWith('airplay')
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var isStarting = state.playing.location.endsWith('-pending')
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if (!isChromecast && !isAirplay) throw new Error('Unimplemented cast type')
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// Show a nice title image, if possible
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var style = {
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backgroundImage: cssBackgroundImagePoster(state)
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}
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// Show whether we're connected to Chromecast / Airplay
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var castStatus = isStarting ? 'Connecting...' : 'Connected'
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return hx`
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<div class='letterbox' style=${style}>
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<div class='cast-screen'>
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<i class='icon'>${isAirplay ? 'airplay' : 'cast'}</i>
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<div class='cast-type'>${isAirplay ? 'AirPlay' : 'Chromecast'}</div>
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<div class='cast-status'>${castStatus}</div>
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</div>
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</div>
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`
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}
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// Returns the CSS background-image string for a poster image + dark vignette
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function cssBackgroundImagePoster (state) {
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var torrentSummary = getPlayingTorrentSummary(state)
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if (!torrentSummary || !torrentSummary.posterURL) return ''
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var cleanURL = torrentSummary.posterURL.replace(/\\/g, '/')
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return 'radial-gradient(circle at center, ' +
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'rgba(0,0,0,0.4) 0%, rgba(0,0,0,1) 100%)' +
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`, url(${cleanURL})`
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}
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function getPlayingTorrentSummary (state) {
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var infoHash = state.playing.infoHash
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return state.saved.torrents.find((x) => x.infoHash === infoHash)
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}
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function renderPlayerControls (state, dispatch) {
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var positionPercent = 100 * state.playing.currentTime / state.playing.duration
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var playbackCursorStyle = { left: 'calc(' + positionPercent + '% - 8px)' }
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var elements = [
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hx`
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<div class='playback-bar'>
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${renderLoadingBar(state)}
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<div class='playback-cursor' style=${playbackCursorStyle}></div>
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<div class='scrub-bar'
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draggable='true'
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onclick=${handleScrub},
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ondrag=${handleScrub}></div>
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</div>
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`,
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hx`
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<i class='icon fullscreen'
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onclick=${() => dispatch('toggleFullScreen')}>
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${state.window.isFullScreen ? 'fullscreen_exit' : 'fullscreen'}
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</i>
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`
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]
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// If we've detected a Chromecast or AppleTV, the user can play video there
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var isOnChromecast = state.playing.location.startsWith('chromecast')
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var isOnAirplay = state.playing.location.startsWith('airplay')
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var chromecastClass, chromecastHandler, airplayClass, airplayHandler
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if (isOnChromecast) {
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chromecastClass = 'active'
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airplayClass = 'disabled'
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chromecastHandler = () => dispatch('stopCasting')
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airplayHandler = undefined
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} else if (isOnAirplay) {
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chromecastClass = 'disabled'
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airplayClass = 'active'
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chromecastHandler = undefined
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airplayHandler = () => dispatch('stopCasting')
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} else {
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chromecastClass = ''
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airplayClass = ''
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chromecastHandler = () => dispatch('openChromecast')
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airplayHandler = () => dispatch('openAirplay')
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}
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if (state.devices.chromecast || isOnChromecast) {
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elements.push(hx`
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<i.icon.chromecast
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class=${chromecastClass}
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onclick=${chromecastHandler}>
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cast
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</i>
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`)
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}
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if (state.devices.airplay || isOnAirplay) {
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elements.push(hx`
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<i.icon.airplay
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class=${airplayClass}
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onclick=${airplayHandler}>
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airplay
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</i>
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`)
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}
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// On OSX, the back button is in the title bar of the window; see app.js
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// On other platforms, we render one over the video on mouseover
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if (process.platform !== 'darwin') {
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elements.push(hx`
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<i.icon.back
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onclick=${() => dispatch('back')}>
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chevron_left
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</i>
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`)
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}
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// Finally, the big button in the center plays or pauses the video
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elements.push(hx`
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<i class='icon play-pause' onclick=${() => dispatch('playPause')}>
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${state.playing.isPaused ? 'play_arrow' : 'pause'}
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</i>
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`)
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return hx`<div class='player-controls'>${elements}</div>`
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// Handles a click or drag to scrub (jump to another position in the video)
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function handleScrub (e) {
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dispatch('mediaMouseMoved')
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var windowWidth = document.querySelector('body').clientWidth
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var fraction = e.clientX / windowWidth
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var position = fraction * state.playing.duration /* seconds */
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dispatch('playbackJump', position)
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}
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}
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// Renders the loading bar. Shows which parts of the torrent are loaded, which
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// can be "spongey" / non-contiguous
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function renderLoadingBar (state) {
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var torrent = state.client.get(state.playing.infoHash)
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if (torrent === null) {
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return []
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}
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// Find all contiguous parts of the torrent which are loaded
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var parts = []
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var lastPartPresent = false
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var numParts = torrent.pieces.length
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for (var i = 0; i < numParts; i++) {
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var partPresent = torrent.bitfield.get(i)
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if (partPresent && !lastPartPresent) {
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parts.push({start: i, count: 1})
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} else if (partPresent) {
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parts[parts.length - 1].count++
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}
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lastPartPresent = partPresent
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}
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// Output an list of rectangles to show loading progress
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return hx`
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<div class='loading-bar'>
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${parts.map(function (part) {
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var style = {
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left: (100 * part.start / numParts) + '%',
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width: (100 * part.count / numParts) + '%'
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}
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return hx`<div class='loading-bar-part' style=${style}></div>`
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})}
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</div>
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`
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}
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