Source: ui/seek_bar.js

  1. /*! @license
  2.  * Shaka Player
  3.  * Copyright 2016 Google LLC
  4.  * SPDX-License-Identifier: Apache-2.0
  5.  */
  8. goog.provide('shaka.ui.SeekBar');
  10. goog.require('shaka.ads.Utils');
  11. goog.require('shaka.net.NetworkingEngine');
  12. goog.require('shaka.ui.Constants');
  13. goog.require('shaka.ui.Locales');
  14. goog.require('shaka.ui.Localization');
  15. goog.require('shaka.ui.RangeElement');
  16. goog.require('shaka.ui.Utils');
  17. goog.require('shaka.util.Dom');
  18. goog.require('shaka.util.Error');
  19. goog.require('shaka.util.Mp4Parser');
  20. goog.require('shaka.util.Networking');
  21. goog.require('shaka.util.Timer');
  22. goog.requireType('shaka.ui.Controls');
  25. /**
  26.  * @extends {shaka.ui.RangeElement}
  27.  * @implements {shaka.extern.IUISeekBar}
  28.  * @final
  29.  * @export
  30.  */
  31. shaka.ui.SeekBar = class extends shaka.ui.RangeElement {
  32.   /**
  33.    * @param {!HTMLElement} parent
  34.    * @param {!shaka.ui.Controls} controls
  35.    */
  36.   constructor(parent, controls) {
  37.     super(parent, controls,
  38.         [
  39.           'shaka-seek-bar-container',
  40.         ],
  41.         [
  42.           'shaka-seek-bar',
  43.           'shaka-no-propagation',
  44.           'shaka-show-controls-on-mouse-over',
  45.         ]);
  47.     /** @private {!HTMLElement} */
  48.     this.adMarkerContainer_ = shaka.util.Dom.createHTMLElement('div');
  49.     this.adMarkerContainer_.classList.add('shaka-ad-markers');
  50.     // Insert the ad markers container as a first child for proper
  51.     // positioning.
  52.     this.container.insertBefore(
  53.         this.adMarkerContainer_, this.container.childNodes[0]);
  56.     /** @private {!shaka.extern.UIConfiguration} */
  57.     this.config_ = this.controls.getConfig();
  59.     /**
  60.      * This timer is used to introduce a delay between the user scrubbing across
  61.      * the seek bar and the seek being sent to the player.
  62.      *
  63.      * @private {shaka.util.Timer}
  64.      */
  65.     this.seekTimer_ = new shaka.util.Timer(() => {
  66.       let newCurrentTime = this.getValue();
  67.       if (!this.player.isLive()) {
  68.         if (newCurrentTime == this.video.duration) {
  69.           newCurrentTime -= 0.001;
  70.         }
  71.       }
  72.       this.video.currentTime = newCurrentTime;
  73.     });
  76.     /**
  77.      * The timer is activated for live content and checks if
  78.      * new ad breaks need to be marked in the current seek range.
  79.      *
  80.      * @private {shaka.util.Timer}
  81.      */
  82.     this.adBreaksTimer_ = new shaka.util.Timer(() => {
  83.       this.markAdBreaks_();
  84.     });
  87.     /**
  88.      * When user is scrubbing the seek bar - we should pause the video - see
  89.      * https://github.com/google/shaka-player/pull/2898#issuecomment-705229215
  90.      * but will conditionally pause or play the video after scrubbing
  91.      * depending on its previous state
  92.      *
  93.      * @private {boolean}
  94.      */
  95.     this.wasPlaying_ = false;
  98.     /** @private {!HTMLElement} */
  99.     this.thumbnailContainer_ = shaka.util.Dom.createHTMLElement('div');
  100.     this.thumbnailContainer_.id = 'shaka-player-ui-thumbnail-container';
  102.     /** @private {!HTMLImageElement} */
  103.     this.thumbnailImage_ = /** @type {!HTMLImageElement} */ (
  104.       shaka.util.Dom.createHTMLElement('img'));
  105.     this.thumbnailImage_.id = 'shaka-player-ui-thumbnail-image';
  106.     this.thumbnailImage_.draggable = false;
  108.     /** @private {!HTMLElement} */
  109.     this.thumbnailTimeContainer_ = shaka.util.Dom.createHTMLElement('div');
  110.     this.thumbnailTimeContainer_.id =
  111.         'shaka-player-ui-thumbnail-time-container';
  113.     /** @private {!HTMLElement} */
  114.     this.thumbnailTime_ = shaka.util.Dom.createHTMLElement('div');
  115.     this.thumbnailTime_.id = 'shaka-player-ui-thumbnail-time';
  116.     this.thumbnailTimeContainer_.appendChild(this.thumbnailTime_);
  118.     this.thumbnailContainer_.appendChild(this.thumbnailImage_);
  119.     this.thumbnailContainer_.appendChild(this.thumbnailTimeContainer_);
  120.     this.container.appendChild(this.thumbnailContainer_);
  122.     this.timeContainer_ = shaka.util.Dom.createHTMLElement('div');
  123.     this.timeContainer_.id = 'shaka-player-ui-time-container';
  124.     this.container.appendChild(this.timeContainer_);
  126.     /**
  127.      * @private {?shaka.extern.Thumbnail}
  128.      */
  129.     this.lastThumbnail_ = null;
  131.     /**
  132.      * @private {?shaka.net.NetworkingEngine.PendingRequest}
  133.      */
  134.     this.lastThumbnailPendingRequest_ = null;
  136.     /**
  137.      * True if the bar is moving due to touchscreen or keyboard events.
  138.      *
  139.      * @private {boolean}
  140.      */
  141.     this.isMoving_ = false;
  143.     /**
  144.      * The timer is activated to hide the thumbnail.
  145.      *
  146.      * @private {shaka.util.Timer}
  147.      */
  148.     this.hideThumbnailTimer_ = new shaka.util.Timer(() => {
  149.       this.hideThumbnail_();
  150.     });
  152.     /** @private {!Array<!shaka.extern.AdCuePoint>} */
  153.     this.adCuePoints_ = [];
  155.     this.eventManager.listen(this.localization,
  156.         shaka.ui.Localization.LOCALE_UPDATED,
  157.         () => this.updateAriaLabel_());
  159.     this.eventManager.listen(this.localization,
  160.         shaka.ui.Localization.LOCALE_CHANGED,
  161.         () => this.updateAriaLabel_());
  163.     this.eventManager.listen(
  164.         this.adManager, shaka.ads.Utils.AD_STARTED, () => {
  165.           if (!this.shouldBeDisplayed_()) {
  166.             shaka.ui.Utils.setDisplay(this.container, false);
  167.           }
  168.         });
  170.     this.eventManager.listen(
  171.         this.adManager, shaka.ads.Utils.AD_STOPPED, () => {
  172.           if (this.shouldBeDisplayed_()) {
  173.             shaka.ui.Utils.setDisplay(this.container, true);
  174.           }
  175.         });
  177.     this.eventManager.listen(
  178.         this.adManager, shaka.ads.Utils.CUEPOINTS_CHANGED, (e) => {
  179.           this.adCuePoints_ = (e)['cuepoints'];
  180.           this.onAdCuePointsChanged_();
  181.         });
  183.     this.eventManager.listen(
  184.         this.player, 'unloading', () => {
  185.           this.adCuePoints_ = [];
  186.           this.onAdCuePointsChanged_();
  187.           if (this.lastThumbnailPendingRequest_) {
  188.             this.lastThumbnailPendingRequest_.abort();
  189.             this.lastThumbnailPendingRequest_ = null;
  190.           }
  191.           this.lastThumbnail_ = null;
  192.           this.hideThumbnail_();
  193.           this.hideTime_();
  194.         });
  196.     this.eventManager.listen(this.bar, 'mousemove', (event) => {
  197.       const rect = this.bar.getBoundingClientRect();
  198.       const min = parseFloat(this.bar.min);
  199.       const max = parseFloat(this.bar.max);
  200.       // Pixels from the left of the range element
  201.       const mousePosition = event.clientX - rect.left;
  202.       // Pixels per unit value of the range element.
  203.       const scale = (max - min) / rect.width;
  204.       // Mouse position in units, which may be outside the allowed range.
  205.       const value = Math.round(min + scale * mousePosition);
  206.       if (!this.player.getImageTracks().length) {
  207.         this.hideThumbnail_();
  208.         this.showTime_(mousePosition, value);
  209.         return;
  210.       }
  211.       this.hideTime_();
  212.       this.showThumbnail_(mousePosition, value);
  213.     });
  215.     this.eventManager.listen(this.container, 'mouseleave', () => {
  216.       this.hideTime_();
  217.       this.hideThumbnailTimer_.stop();
  218.       this.hideThumbnailTimer_.tickAfter(/* seconds= */ 0.25);
  219.     });
  221.     // Initialize seek state and label.
  222.     this.setValue(this.video.currentTime);
  223.     this.update();
  224.     this.updateAriaLabel_();
  226.     if (this.ad) {
  227.       // There was already an ad.
  228.       shaka.ui.Utils.setDisplay(this.container, false);
  229.     }
  230.   }
  232.   /** @override */
  233.   release() {
  234.     if (this.seekTimer_) {
  235.       this.seekTimer_.stop();
  236.       this.seekTimer_ = null;
  237.       this.adBreaksTimer_.stop();
  238.       this.adBreaksTimer_ = null;
  239.     }
  241.     super.release();
  242.   }
  244.   /**
  245.    * Called by the base class when user interaction with the input element
  246.    * begins.
  247.    *
  248.    * @override
  249.    */
  250.   onChangeStart() {
  251.     this.wasPlaying_ = !this.video.paused;
  252.     this.controls.setSeeking(true);
  253.     this.video.pause();
  254.     this.hideThumbnailTimer_.stop();
  255.     this.isMoving_ = true;
  256.   }
  258.   /**
  259.    * Update the video element's state to match the input element's state.
  260.    * Called by the base class when the input element changes.
  261.    *
  262.    * @override
  263.    */
  264.   onChange() {
  265.     if (!this.video.duration) {
  266.       // Can't seek yet.  Ignore.
  267.       return;
  268.     }
  270.     // Update the UI right away.
  271.     this.update();
  273.     // We want to wait until the user has stopped moving the seek bar for a
  274.     // little bit to reduce the number of times we ask the player to seek.
  275.     //
  276.     // To do this, we will start a timer that will fire in a little bit, but if
  277.     // we see another seek bar change, we will cancel that timer and re-start
  278.     // it.
  279.     //
  280.     // Calling |start| on an already pending timer will cancel the old request
  281.     // and start the new one.
  282.     this.seekTimer_.tickAfter(/* seconds= */ 0.125);
  284.     if (this.player.getImageTracks().length) {
  285.       const min = parseFloat(this.bar.min);
  286.       const max = parseFloat(this.bar.max);
  287.       const rect = this.bar.getBoundingClientRect();
  288.       const value = Math.round(this.getValue());
  289.       const scale = (max - min) / rect.width;
  290.       const position = (value - min) / scale;
  291.       this.showThumbnail_(position, value);
  292.     } else {
  293.       this.hideThumbnail_();
  294.     }
  295.   }
  297.   /**
  298.    * Called by the base class when user interaction with the input element
  299.    * ends.
  300.    *
  301.    * @override
  302.    */
  303.   onChangeEnd() {
  304.     // They just let go of the seek bar, so cancel the timer and manually
  305.     // call the event so that we can respond immediately.
  306.     this.seekTimer_.tickNow();
  307.     this.controls.setSeeking(false);
  309.     if (this.wasPlaying_) {
  310.       this.video.play();
  311.     }
  313.     if (this.isMoving_) {
  314.       this.isMoving_ = false;
  315.       this.hideThumbnailTimer_.stop();
  316.       this.hideThumbnailTimer_.tickAfter(/* seconds= */ 0.25);
  317.     }
  318.   }
  320.   /**
  321.    * @override
  322.    */
  323.   isShowing() {
  324.     // It is showing by default, so it is hidden if shaka-hidden is in the list.
  325.     return !this.container.classList.contains('shaka-hidden');
  326.   }
  328.   /**
  329.    * @override
  330.    */
  331.   update() {
  332.     const colors = this.config_.seekBarColors;
  333.     const currentTime = this.getValue();
  334.     const bufferedLength = this.video.buffered.length;
  335.     const bufferedStart = bufferedLength ? this.video.buffered.start(0) : 0;
  336.     const bufferedEnd =
  337.         bufferedLength ? this.video.buffered.end(bufferedLength - 1) : 0;
  339.     const seekRange = this.player.seekRange();
  340.     const seekRangeSize = seekRange.end - seekRange.start;
  342.     this.setRange(seekRange.start, seekRange.end);
  344.     if (!this.shouldBeDisplayed_()) {
  345.       shaka.ui.Utils.setDisplay(this.container, false);
  346.     } else {
  347.       shaka.ui.Utils.setDisplay(this.container, true);
  349.       if (bufferedLength == 0) {
  350.         this.container.style.background = colors.base;
  351.       } else {
  352.         const clampedBufferStart = Math.max(bufferedStart, seekRange.start);
  353.         const clampedBufferEnd = Math.min(bufferedEnd, seekRange.end);
  354.         const clampedCurrentTime = Math.min(
  355.             Math.max(currentTime, seekRange.start),
  356.             seekRange.end);
  358.         const bufferStartDistance = clampedBufferStart - seekRange.start;
  359.         const bufferEndDistance = clampedBufferEnd - seekRange.start;
  360.         const playheadDistance = clampedCurrentTime - seekRange.start;
  362.         // NOTE: the fallback to zero eliminates NaN.
  363.         const bufferStartFraction = (bufferStartDistance / seekRangeSize) || 0;
  364.         const bufferEndFraction = (bufferEndDistance / seekRangeSize) || 0;
  365.         const playheadFraction = (playheadDistance / seekRangeSize) || 0;
  367.         const unbufferedColor =
  368.             this.config_.showUnbufferedStart ? colors.base : colors.played;
  370.         const gradient = [
  371.           'to right',
  372.           this.makeColor_(unbufferedColor, bufferStartFraction),
  373.           this.makeColor_(colors.played, bufferStartFraction),
  374.           this.makeColor_(colors.played, playheadFraction),
  375.           this.makeColor_(colors.buffered, playheadFraction),
  376.           this.makeColor_(colors.buffered, bufferEndFraction),
  377.           this.makeColor_(colors.base, bufferEndFraction),
  378.         ];
  379.         this.container.style.background =
  380.             'linear-gradient(' + gradient.join(',') + ')';
  381.       }
  382.     }
  383.   }
  385.   /**
  386.    * @private
  387.    */
  388.   markAdBreaks_() {
  389.     if (!this.adCuePoints_.length) {
  390.       this.adMarkerContainer_.style.background = 'transparent';
  391.       this.adBreaksTimer_.stop();
  392.       return;
  393.     }
  395.     const seekRange = this.player.seekRange();
  396.     const seekRangeSize = seekRange.end - seekRange.start;
  397.     const gradient = ['to right'];
  398.     let pointsAsFractions = [];
  399.     const adBreakColor = this.config_.seekBarColors.adBreaks;
  400.     let postRollAd = false;
  401.     for (const point of this.adCuePoints_) {
  402.       // Post-roll ads are marked as starting at -1 in CS IMA ads.
  403.       if (point.start == -1 && !point.end) {
  404.         postRollAd = true;
  405.         continue;
  406.       }
  407.       // Filter point within the seek range. For points with no endpoint
  408.       // (client side ads) check that the start point is within range.
  409.       if ((!point.end && point.start >= seekRange.start) ||
  410.           (typeof point.end == 'number' && point.end > seekRange.start)) {
  411.         const startDist =
  412.             Math.max(point.start, seekRange.start) - seekRange.start;
  413.         const startFrac = (startDist / seekRangeSize) || 0;
  414.         // For points with no endpoint assume a 1% length: not too much,
  415.         // but enough to be visible on the timeline.
  416.         let endFrac = startFrac + 0.01;
  417.         if (point.end) {
  418.           const endDist = point.end - seekRange.start;
  419.           endFrac = (endDist / seekRangeSize) || 0;
  420.         }
  422.         pointsAsFractions.push({
  423.           start: startFrac,
  424.           end: endFrac,
  425.         });
  426.       }
  427.     }
  429.     pointsAsFractions = pointsAsFractions.sort((a, b) => {
  430.       return a.start - b.start;
  431.     });
  433.     for (const point of pointsAsFractions) {
  434.       gradient.push(this.makeColor_('transparent', point.start));
  435.       gradient.push(this.makeColor_(adBreakColor, point.start));
  436.       gradient.push(this.makeColor_(adBreakColor, point.end));
  437.       gradient.push(this.makeColor_('transparent', point.end));
  438.     }
  440.     if (postRollAd) {
  441.       gradient.push(this.makeColor_('transparent', 0.99));
  442.       gradient.push(this.makeColor_(adBreakColor, 0.99));
  443.     }
  444.     this.adMarkerContainer_.style.background =
  445.             'linear-gradient(' + gradient.join(',') + ')';
  446.   }
  449.   /**
  450.    * @param {string} color
  451.    * @param {number} fraction
  452.    * @return {string}
  453.    * @private
  454.    */
  455.   makeColor_(color, fraction) {
  456.     return color + ' ' + (fraction * 100) + '%';
  457.   }
  460.   /**
  461.    * @private
  462.    */
  463.   onAdCuePointsChanged_() {
  464.     const action = () => {
  465.       this.markAdBreaks_();
  466.       const seekRange = this.player.seekRange();
  467.       const seekRangeSize = seekRange.end - seekRange.start;
  468.       const minSeekBarWindow =
  469.           shaka.ui.Constants.MIN_SEEK_WINDOW_TO_SHOW_SEEKBAR;
  470.       // Seek range keeps changing for live content and some of the known
  471.       // ad breaks might not be in the seek range now, but get into
  472.       // it later.
  473.       // If we have a LIVE seekable content, keep checking for ad breaks
  474.       // every second.
  475.       if (this.player.isLive() && seekRangeSize > minSeekBarWindow) {
  476.         this.adBreaksTimer_.tickEvery(/* seconds= */ 0.25);
  477.       }
  478.     };
  479.     if (this.player.isFullyLoaded()) {
  480.       action();
  481.     } else {
  482.       this.eventManager.listenOnce(this.player, 'loaded', action);
  483.     }
  484.   }
  487.   /**
  488.    * @return {boolean}
  489.    * @private
  490.    */
  491.   shouldBeDisplayed_() {
  492.     // The seek bar should be hidden when the seek window's too small or
  493.     // there's an ad playing.
  494.     const seekRange = this.player.seekRange();
  495.     const seekRangeSize = seekRange.end - seekRange.start;
  497.     if (this.player.isLive() &&
  498.         (seekRangeSize < shaka.ui.Constants.MIN_SEEK_WINDOW_TO_SHOW_SEEKBAR ||
  499.         !isFinite(seekRangeSize))) {
  500.       return false;
  501.     }
  503.     return this.ad == null || !this.ad.isLinear();
  504.   }
  506.   /** @private */
  507.   updateAriaLabel_() {
  508.     this.bar.ariaLabel = this.localization.resolve(shaka.ui.Locales.Ids.SEEK);
  509.   }
  511.   /** @private */
  512.   showTime_(pixelPosition, value) {
  513.     const offsetTop = -10;
  514.     const width = this.timeContainer_.clientWidth;
  515.     const height = 20;
  516.     this.timeContainer_.style.width = 'auto';
  517.     this.timeContainer_.style.height = height + 'px';
  518.     this.timeContainer_.style.top = -(height - offsetTop) + 'px';
  519.     const leftPosition = Math.min(this.bar.offsetWidth - width,
  520.         Math.max(0, pixelPosition - (width / 2)));
  521.     this.timeContainer_.style.left = leftPosition + 'px';
  522.     this.timeContainer_.style.right = '';
  523.     this.timeContainer_.style.visibility = 'visible';
  524.     const seekRange = this.player.seekRange();
  525.     if (this.player.isLive()) {
  526.       const totalSeconds = seekRange.end - value;
  527.       if (totalSeconds < 1) {
  528.         this.timeContainer_.textContent =
  529.             this.localization.resolve(shaka.ui.Locales.Ids.LIVE);
  530.         this.timeContainer_.style.left = '';
  531.         this.timeContainer_.style.right = '0px';
  532.       } else {
  533.         this.timeContainer_.textContent =
  534.             '-' + this.timeFormatter_(totalSeconds);
  535.       }
  536.     } else {
  537.       const totalSeconds = value - seekRange.start;
  538.       this.timeContainer_.textContent = this.timeFormatter_(totalSeconds);
  539.     }
  540.   }
  543.   /**
  544.    * @private
  545.    */
  546.   async showThumbnail_(pixelPosition, value) {
  547.     if (value < 0) {
  548.       value = 0;
  549.     }
  550.     const seekRange = this.player.seekRange();
  551.     const playerValue = Math.max(Math.ceil(seekRange.start),
  552.         Math.min(Math.floor(seekRange.end), value));
  553.     if (this.player.isLive()) {
  554.       const totalSeconds = seekRange.end - value;
  555.       if (totalSeconds < 1) {
  556.         this.thumbnailTime_.textContent =
  557.             this.localization.resolve(shaka.ui.Locales.Ids.LIVE);
  558.       } else {
  559.         this.thumbnailTime_.textContent =
  560.             '-' + this.timeFormatter_(totalSeconds);
  561.       }
  562.     } else {
  563.       this.thumbnailTime_.textContent = this.timeFormatter_(value);
  564.     }
  565.     const thumbnail =
  566.         await this.player.getThumbnails(/* trackId= */ null, playerValue);
  567.     if (!thumbnail || !thumbnail.uris.length) {
  568.       this.hideThumbnail_();
  569.       return;
  570.     }
  571.     if (thumbnail.width < thumbnail.height) {
  572.       this.thumbnailContainer_.classList.add('portrait-thumbnail');
  573.     } else {
  574.       this.thumbnailContainer_.classList.remove('portrait-thumbnail');
  575.     }
  576.     const offsetTop = -10;
  577.     const width = this.thumbnailContainer_.clientWidth;
  578.     let height = Math.floor(width * 9 / 16);
  579.     this.thumbnailContainer_.style.height = height + 'px';
  580.     this.thumbnailContainer_.style.top = -(height - offsetTop) + 'px';
  581.     const leftPosition = Math.min(this.bar.offsetWidth - width,
  582.         Math.max(0, pixelPosition - (width / 2)));
  583.     this.thumbnailContainer_.style.left = leftPosition + 'px';
  584.     this.thumbnailContainer_.style.visibility = 'visible';
  585.     let uri = thumbnail.uris[0].split('#xywh=')[0];
  586.     if (!this.lastThumbnail_ ||
  587.         uri !== this.lastThumbnail_.uris[0].split('#xywh=')[0] ||
  588.         thumbnail.segment.getStartByte() !=
  589.             this.lastThumbnail_.segment.getStartByte() ||
  590.         thumbnail.segment.getEndByte() !=
  591.             this.lastThumbnail_.segment.getEndByte()) {
  592.       this.lastThumbnail_ = thumbnail;
  593.       if (this.lastThumbnailPendingRequest_) {
  594.         this.lastThumbnailPendingRequest_.abort();
  595.         this.lastThumbnailPendingRequest_ = null;
  596.       }
  597.       if (thumbnail.codecs == 'mjpg' || uri.startsWith('offline:')) {
  598.         this.thumbnailImage_.src = shaka.ui.SeekBar.Transparent_Image_;
  599.         try {
  600.           const requestType = shaka.net.NetworkingEngine.RequestType.SEGMENT;
  601.           const type =
  602.               shaka.net.NetworkingEngine.AdvancedRequestType.MEDIA_SEGMENT;
  603.           const request = shaka.util.Networking.createSegmentRequest(
  604.               thumbnail.segment.getUris(),
  605.               thumbnail.segment.getStartByte(),
  606.               thumbnail.segment.getEndByte(),
  607.               this.player.getConfiguration().streaming.retryParameters);
  608.           this.lastThumbnailPendingRequest_ = this.player.getNetworkingEngine()
  609.               .request(requestType, request, {type});
  610.           const response = await this.lastThumbnailPendingRequest_.promise;
  611.           this.lastThumbnailPendingRequest_ = null;
  612.           if (thumbnail.codecs == 'mjpg') {
  613.             const parser = new shaka.util.Mp4Parser()
  614.                 .box('mdat', shaka.util.Mp4Parser.allData((data) => {
  615.                   const blob = new Blob([data], {type: 'image/jpeg'});
  616.                   uri = URL.createObjectURL(blob);
  617.                 }));
  618.             parser.parse(response.data, /* partialOkay= */ false);
  619.           } else {
  620.             const mimeType = thumbnail.mimeType || 'image/jpeg';
  621.             const blob = new Blob([response.data], {type: mimeType});
  622.             uri = URL.createObjectURL(blob);
  623.           }
  624.         } catch (error) {
  625.           if (error.code == shaka.util.Error.Code.OPERATION_ABORTED) {
  626.             return;
  627.           }
  628.           throw error;
  629.         }
  630.       }
  631.       try {
  632.         this.thumbnailContainer_.removeChild(this.thumbnailImage_);
  633.       } catch (e) {
  634.         // The image is not a child
  635.       }
  636.       this.thumbnailImage_ = /** @type {!HTMLImageElement} */ (
  637.         shaka.util.Dom.createHTMLElement('img'));
  638.       this.thumbnailImage_.id = 'shaka-player-ui-thumbnail-image';
  639.       this.thumbnailImage_.draggable = false;
  640.       this.thumbnailImage_.src = uri;
  641.       this.thumbnailImage_.onload = () => {
  642.         if (uri.startsWith('blob:')) {
  643.           URL.revokeObjectURL(uri);
  644.         }
  645.       };
  646.       this.thumbnailContainer_.insertBefore(this.thumbnailImage_,
  647.           this.thumbnailContainer_.firstChild);
  648.     }
  649.     const scale = width / thumbnail.width;
  650.     if (thumbnail.imageHeight) {
  651.       this.thumbnailImage_.height = thumbnail.imageHeight;
  652.     } else if (!thumbnail.sprite) {
  653.       this.thumbnailImage_.style.height = '100%';
  654.       this.thumbnailImage_.style.objectFit = 'contain';
  655.     }
  656.     if (thumbnail.imageWidth) {
  657.       this.thumbnailImage_.width = thumbnail.imageWidth;
  658.     } else if (!thumbnail.sprite) {
  659.       this.thumbnailImage_.style.width = '100%';
  660.       this.thumbnailImage_.style.objectFit = 'contain';
  661.     }
  662.     this.thumbnailImage_.style.left = '-' + scale * thumbnail.positionX + 'px';
  663.     this.thumbnailImage_.style.top = '-' + scale * thumbnail.positionY + 'px';
  664.     this.thumbnailImage_.style.transform = 'scale(' + scale + ')';
  665.     this.thumbnailImage_.style.transformOrigin = 'left top';
  666.     // Update container height and top
  667.     height = Math.floor(width * thumbnail.height / thumbnail.width);
  668.     this.thumbnailContainer_.style.height = height + 'px';
  669.     this.thumbnailContainer_.style.top = -(height - offsetTop) + 'px';
  670.   }
  673.   /**
  674.    * @private
  675.    */
  676.   hideThumbnail_() {
  677.     this.thumbnailContainer_.style.visibility = 'hidden';
  678.   }
  681.   /**
  682.    * @private
  683.    */
  684.   hideTime_() {
  685.     this.timeContainer_.style.visibility = 'hidden';
  686.   }
  689.   /**
  690.    * @param {number} totalSeconds
  691.    * @private
  692.    */
  693.   timeFormatter_(totalSeconds) {
  694.     const secondsNumber = Math.round(totalSeconds);
  695.     const hours = Math.floor(secondsNumber / 3600);
  696.     let minutes = Math.floor((secondsNumber - (hours * 3600)) / 60);
  697.     let seconds = secondsNumber - (hours * 3600) - (minutes * 60);
  698.     if (seconds < 10) {
  699.       seconds = '0' + seconds;
  700.     }
  701.     if (hours > 0) {
  702.       if (minutes < 10) {
  703.         minutes = '0' + minutes;
  704.       }
  705.       return hours + ':' + minutes + ':' + seconds;
  706.     } else {
  707.       return minutes + ':' + seconds;
  708.     }
  709.   }
  710. };
  713. /**
  714.  * @const {string}
  715.  * @private
  716.  */
  717. shaka.ui.SeekBar.Transparent_Image_ =
  718.     'data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg"/>';
  721. /**
  722.  * @implements {shaka.extern.IUISeekBar.Factory}
  723.  * @export
  724.  */
  726. shaka.ui.SeekBar.Factory = class {
  727.   /**
  728.    * Creates a shaka.ui.SeekBar. Use this factory to register the default
  729.    * SeekBar when needed
  730.    *
  731.    * @override
  732.    */
  733.   create(rootElement, controls) {
  734.     return new shaka.ui.SeekBar(rootElement, controls);
  735.   }
  736. };