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    <h1>
      <a href="../../index.html">All files</a> / <a href="index.html">src/fx</a> visualizations.js
    </h1>
    <div class='clearfix'>
      <div class='fl pad1y space-right2'>
        <span class="strong">9.68% </span>
        <span class="quiet">Statements</span>
        <span class='fraction'>9/93</span>
      </div>
      <div class='fl pad1y space-right2'>
        <span class="strong">1.75% </span>
        <span class="quiet">Branches</span>
        <span class='fraction'>2/114</span>
      </div>
      <div class='fl pad1y space-right2'>
        <span class="strong">28.57% </span>
        <span class="quiet">Functions</span>
        <span class='fraction'>4/14</span>
      </div>
      <div class='fl pad1y space-right2'>
        <span class="strong">9.68% </span>
        <span class="quiet">Lines</span>
        <span class='fraction'>9/93</span>
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    </div>
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  <div class='status-line low'></div>
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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">/**
 * Imports the config module
 * @module config
 */
import config from "../config.js";
&nbsp;
/**
 * Imports the debug module
 * @module utilities/Debug
 */
import Debug from "../utilities/debug.js";
&nbsp;
/**
 * Handles the visualizations elements.
 *
 * @module Visualizations
 */
let Visualizations = (function() {
  /**
   * Runs all of the visualizations on the screen.
   */
  function run() {
    /*
      Get all of the visualization elements on the page
    */
    let visualizationElements = document.querySelectorAll(
      ".amplitude-visualization"
    );
&nbsp;
    /*
      If the web audio API is available, we display the visualizations.
    */
    <span class="missing-if-branch" title="if path not taken" >I</span>if (config.web_audio_api_available) {
      /*
        If the visualization has not started, there are visualizations available,
        and we have at least one visualization element, then we continue.
      */
<span class="cstat-no" title="statement not covered" >      if (</span>
        Object.keys(config.visualizations.available).length &gt; 0 &amp;&amp;
        visualizationElements.length &gt; 0
      ) {
        /*
            Iterate over all of the visualizations on the page and activate the
            ones we need.
          */
<span class="cstat-no" title="statement not covered" >        for (let i = 0; i &lt; visualizationElements.length; i++) {</span>
          /*
              Grab the playlist and song attributes from the visualization to
              determine which one we run.
            */
          let playlist = <span class="cstat-no" title="statement not covered" >visualizationElements[i].getAttribute(</span>
            "data-amplitude-playlist"
          );
          let song = <span class="cstat-no" title="statement not covered" >visualizationElements[i].getAttribute(</span>
            "data-amplitude-song-index"
          );
&nbsp;
          /*
              If the playlist and song are null, it's a global visualization element.
            */
<span class="cstat-no" title="statement not covered" >          if (playlist == null &amp;&amp; song == null) {</span>
<span class="cstat-no" title="statement not covered" >            runGlobalVisualization(visualizationElements[i]);</span>
          }
&nbsp;
          /*
              if the playlist is not null and the song is null it's a playlist visualization
              element.
            */
<span class="cstat-no" title="statement not covered" >          if (playlist != null &amp;&amp; song == null) {</span>
<span class="cstat-no" title="statement not covered" >            runPlaylistVisualization(visualizationElements[i], playlist);</span>
          }
&nbsp;
          /*
              If the playlist is null and the song is not null it's a song visualization element.
            */
<span class="cstat-no" title="statement not covered" >          if (playlist == null &amp;&amp; song != null) {</span>
<span class="cstat-no" title="statement not covered" >            runSongVisualization(visualizationElements[i], song);</span>
          }
&nbsp;
          /*
              If the playlist and song are not null then it's a song in playlist visualization
              element.
            */
<span class="cstat-no" title="statement not covered" >          if (playlist != null &amp;&amp; song != null) {</span>
<span class="cstat-no" title="statement not covered" >            runSongInPlaylistVisualization(</span>
              visualizationElements[i],
              playlist,
              song
            );
          }
        }
      }
    } else {
      displayBackups();
    }
  }
&nbsp;
  /**
   * Runs a global visualization
   *
   * @param {Node} element  The container element that handles the visualization.
   */
  function <span class="fstat-no" title="function not covered" >runGlobalVisualization(</span>element) {
    /*
      Gets the global visualization index and the active song visualization indexes
      so we know which visualization to use. The song will override the global
    */
    let globalVisualizationIndex = <span class="cstat-no" title="statement not covered" >config.visualization;</span>
    let activeSongVisualizationIndex =
<span class="cstat-no" title="statement not covered" >      config.active_index != null</span>
        ? config.songs[config.active_index].visualization
        : config.playlists[config.active_playlist].songs[
            config.playlists[config.active_playlist].active_index
          ].visualization;
&nbsp;
    /*
      If the active song visualization is defined and the visualization exists,
      use that visualization.
    */
<span class="cstat-no" title="statement not covered" >    if (</span>
      activeSongVisualizationIndex != undefined &amp;&amp;
      config.visualizations.available[activeSongVisualizationIndex] != undefined
    ) {
<span class="cstat-no" title="statement not covered" >      addToActiveVisualizations(activeSongVisualizationIndex, element);</span>
&nbsp;
      /*
      If the user defined a global visualization, use that one.
    */
    } else <span class="cstat-no" title="statement not covered" >if (</span>
      globalVisualizationIndex != undefined &amp;&amp;
      config.visualizations.available[globalVisualizationIndex] != undefined
    ) {
<span class="cstat-no" title="statement not covered" >      addToActiveVisualizations(globalVisualizationIndex, element);</span>
&nbsp;
      /*
      If the user didn't define a global visualization, use the first visualization
      registered if there is one.
    */
    } else {
      /*
        Grab the first registered visualization. If it exists, use that one.
      */
      let firstVisualization =
<span class="cstat-no" title="statement not covered" >        Object.keys(config.visualizations.available).length &gt; 0</span>
          ? Object.keys(config.visualizations.available)[0]
          : null;
&nbsp;
<span class="cstat-no" title="statement not covered" >      if (firstVisualization != null) {</span>
<span class="cstat-no" title="statement not covered" >        addToActiveVisualizations(firstVisualization, element);</span>
      }
    }
  }
&nbsp;
  /**
   * Run a specific playlist visualization.
   *
   * @param {Node} element  The container element that handles the visualization.
   * @param {string} playlist The key of the playlist we are running the visualization for.
   */
  function <span class="fstat-no" title="function not covered" >runPlaylistVisualization(</span>element, playlist) {
    /*
      If the playlist is equal to the active playlist, then we continue.
    */
<span class="cstat-no" title="statement not covered" >    if (playlist == config.active_playlist) {</span>
      /*
        Checks if the song has a visualization and that visualization exists,
        run that visualization.
      */
      let activeSongVisualizationIndex =
<span class="cstat-no" title="statement not covered" >        config.playlists[config.active_playlist].songs[</span>
          config.playlists[config.active_playlist].active_index
        ].visualization;
      let activePlaylistVisualizationIndex =
<span class="cstat-no" title="statement not covered" >        config.playlists[config.active_playlist].visualization;</span>
      let globalVisualizationIndex = <span class="cstat-no" title="statement not covered" >config.visualization;</span>
&nbsp;
      /*
        If the actual song has a visualization, we run that.
      */
<span class="cstat-no" title="statement not covered" >      if (</span>
        activeSongVisualizationIndex != undefined &amp;&amp;
        config.visualizations.available[activeSongVisualizationIndex] !=
          undefined
      ) {
<span class="cstat-no" title="statement not covered" >        addToActiveVisualizations(activeSongVisualizationIndex, element);</span>
&nbsp;
        /*
        If the actual playlist has a visualization, run that.
      */
      } else <span class="cstat-no" title="statement not covered" >if (</span>
        activePlaylistVisualizationIndex != undefined &amp;&amp;
        config.visualizations.available[activePlaylistVisualizationIndex] !=
          undefined
      ) {
<span class="cstat-no" title="statement not covered" >        addToActiveVisualizations(activePlaylistVisualizationIndex, element);</span>
&nbsp;
        /*
        If a global visualization is defined, run that.
      */
      } else <span class="cstat-no" title="statement not covered" >if (</span>
        globalVisualizationIndex != undefined &amp;&amp;
        config.visualizations.available[globalVisualizationIndex] != undefined
      ) {
<span class="cstat-no" title="statement not covered" >        addToActiveVisualizations(globalVisualizationIndex, element);</span>
      } else {
        /*
          Grab the first registered visualization. If it exists, use that one.
        */
        let firstVisualization =
<span class="cstat-no" title="statement not covered" >          Object.keys(config.visualizations.available).length &gt; 0</span>
            ? Object.keys(config.visualizations.available)[0]
            : null;
&nbsp;
<span class="cstat-no" title="statement not covered" >        if (firstVisualization != null) {</span>
<span class="cstat-no" title="statement not covered" >          addToActiveVisualizations(firstVisualization, element);</span>
        }
      }
    }
  }
&nbsp;
  /**
   * Run a song specific visualization.
   *
   * @param {Node} element The container element that handles the visualization.
   * @param {string} song The song index that we are running the visualization for.
   */
  function <span class="fstat-no" title="function not covered" >runSongVisualization(</span>element, song) {
    /*
      If the song is equal to the active song, then we continue.
    */
<span class="cstat-no" title="statement not covered" >    if (song == config.active_index) {</span>
      /*
        Get the indexes of the song
      */
      let activeSongVisualizationIndex =
<span class="cstat-no" title="statement not covered" >        config.songs[config.active_index].visualization;</span>
      let globalVisualizationIndex = <span class="cstat-no" title="statement not covered" >config.visualization;</span>
&nbsp;
      /*
        If the song has a visualization, run that.
      */
<span class="cstat-no" title="statement not covered" >      if (</span>
        activeSongVisualizationIndex != undefined &amp;&amp;
        config.visualizations.available[activeSongVisualizationIndex] !=
          undefined
      ) {
<span class="cstat-no" title="statement not covered" >        addToActiveVisualizations(activeSongVisualizationIndex, element);</span>
&nbsp;
        /*
        If the global visualization is set, use that.
      */
      } else <span class="cstat-no" title="statement not covered" >if (</span>
        globalVisualizationIndex != undefined &amp;&amp;
        config.visualizations.available[globalVisualizationIndex] != undefined
      ) {
<span class="cstat-no" title="statement not covered" >        addToActiveVisualizations(globalVisualizationIndex, element);</span>
      } else {
        /*
          Grab the first registered visualization. If it exists, use that one.
        */
        let firstVisualization =
<span class="cstat-no" title="statement not covered" >          Object.keys(config.visualizations.available).length &gt; 0</span>
            ? Object.keys(config.visualizations.available)[0]
            : null;
&nbsp;
<span class="cstat-no" title="statement not covered" >        if (firstVisualization != null) {</span>
<span class="cstat-no" title="statement not covered" >          addToActiveVisualizations(firstVisualization, element);</span>
        }
      }
    }
  }
&nbsp;
  /**
   * Run a song in playlist visualization.
   *
   * @param {Node} element - The element containing the visualization.
   * @param {string} playlist - The string of the playlist key.
   * @param {index} song - The index of the song in the playlist.
   */
  function <span class="fstat-no" title="function not covered" >runSongInPlaylistVisualization(</span>element, playlist, song) {
    /*
      If the playlist is the same as the active playlist and the active
      index of the song is the same as the song, then we continue.
    */
<span class="cstat-no" title="statement not covered" >    if (</span>
      playlist == config.active_playlist &amp;&amp;
      config.playlists[playlist].active_index == song
    ) {
      /*
        Checks if the song has a visualization and that visualization exists,
        run that visualization.
      */
      let activeSongVisualizationIndex =
<span class="cstat-no" title="statement not covered" >        config.playlists[config.active_playlist].songs[</span>
          config.playlists[config.active_playlist].active_index
        ].visualization;
      let activePlaylistVisualizationIndex =
<span class="cstat-no" title="statement not covered" >        config.playlists[config.active_playlist].visualization;</span>
      let globalVisualizationIndex = <span class="cstat-no" title="statement not covered" >config.visualization;</span>
&nbsp;
      /*
        If the active song has a visualization, we use that.
      */
<span class="cstat-no" title="statement not covered" >      if (</span>
        activeSongVisualizationIndex != undefined &amp;&amp;
        config.visualizations.available[activeSongVisualizationIndex] !=
          undefined
      ) {
<span class="cstat-no" title="statement not covered" >        addToActiveVisualizations(activeSongVisualizationIndex, element);</span>
&nbsp;
        /*
        If the active playlist has a visualization, we use that.
      */
      } else <span class="cstat-no" title="statement not covered" >if (</span>
        activePlaylistVisualizationIndex != undefined &amp;&amp;
        config.visualizations.available[activePlaylistVisualizationIndex] !=
          undefined
      ) {
<span class="cstat-no" title="statement not covered" >        addToActiveVisualizations(activePlaylistVisualizationIndex, element);</span>
&nbsp;
        /*
        If the global visualization has been set, we use that.
      */
      } else <span class="cstat-no" title="statement not covered" >if (</span>
        globalVisualizationIndex != undefined &amp;&amp;
        config.visualizations.available[globalVisualizationIndex] != undefined
      ) {
<span class="cstat-no" title="statement not covered" >        addToActiveVisualizations(globalVisualizationIndex, element);</span>
      } else {
        /*
          Grab the first registered visualization. If it exists, use that one.
        */
        let firstVisualization =
<span class="cstat-no" title="statement not covered" >          Object.keys(config.visualizations.available).length &gt; 0</span>
            ? Object.keys(config.visualizations.available)[0]
            : null;
&nbsp;
<span class="cstat-no" title="statement not covered" >        if (firstVisualization != null) {</span>
<span class="cstat-no" title="statement not covered" >          addToActiveVisualizations(firstVisualization, element);</span>
        }
      }
    }
  }
&nbsp;
  /**
   * Add a visualization to the array of active visualizations.
   *
   * @param {string} key - The key of the active visualization.
   * @param {Node} element - The element that the visualization will be applied to.
   */
  function <span class="fstat-no" title="function not covered" >addToActiveVisualizations(</span>key, element) {
    let visualization = <span class="cstat-no" title="statement not covered" >new config.visualizations.available[key]["object"]();</span>
<span class="cstat-no" title="statement not covered" >    visualization.setPreferences(</span>
      config.visualizations.available[key]["preferences"]
    );
<span class="cstat-no" title="statement not covered" >    visualization.startVisualization(element);</span>
<span class="cstat-no" title="statement not covered" >    config.visualizations.active.push(visualization);</span>
  }
&nbsp;
  /**
   * Stops all active visualizations.
   */
  function stop() {
    /*
      Iterates over all of the visualizations and stop the visualization.
    */
    for (let i = 0; i &lt; config.visualizations.active.length; i++) {
<span class="cstat-no" title="statement not covered" >      config.visualizations.active[i].stopVisualization();</span>
    }
&nbsp;
    /*
      Clear the active visualizations.
    */
    config.visualizations.active = [];
  }
&nbsp;
  /**
   * Registers any visualization we can use.
   *
   * @param {object} visualization The visualization object itself
   * @param {object} preferences User preferences overrides.
   */
  function <span class="fstat-no" title="function not covered" >register(</span>visualization, preferences) {
    /*
      Initialize the new visualization.
    */
    let newVisualization = <span class="cstat-no" title="statement not covered" >new visualization();</span>
&nbsp;
    /*
	    Adds the visualization to the global config so it knows
	    it can be used when playing songs.
&nbsp;
	    getID is a public function for getting a visualization's id.
	    It becomes the key to access the visualization.
	  */
<span class="cstat-no" title="statement not covered" >    config.visualizations.available[newVisualization.getID()] = new Array();</span>
<span class="cstat-no" title="statement not covered" >    config.visualizations.available[newVisualization.getID()][</span>
      "object"
    ] = visualization;
<span class="cstat-no" title="statement not covered" >    config.visualizations.available[newVisualization.getID()][</span>
      "preferences"
    ] = preferences;
  }
&nbsp;
  /**
   * Displays the backups for the visualizations.
   */
  function displayBackups() {
    /*
      Get all of the visualization elements on the page
    */
    let visualizationElements = document.querySelectorAll(
      ".amplitude-visualization"
    );
&nbsp;
    <span class="missing-if-branch" title="if path not taken" >I</span>if (visualizationElements.length &gt; 0) {
<span class="cstat-no" title="statement not covered" >      for (let x = 0; x &lt; visualizationElements.length; x++) {</span>
        /*
          Grab the playlist and song attributes from the visualization to
          determine which one we run.
        */
        let playlist = <span class="cstat-no" title="statement not covered" >visualizationElements[x].getAttribute(</span>
          "data-amplitude-playlist"
        );
        let song = <span class="cstat-no" title="statement not covered" >visualizationElements[x].getAttribute(</span>
          "data-amplitude-song-index"
        );
&nbsp;
        /*
          If the playlist and song are null, it's a global visualization element.
        */
<span class="cstat-no" title="statement not covered" >        if (playlist == null &amp;&amp; song == null) {</span>
<span class="cstat-no" title="statement not covered" >          displayGlobalBackup(visualizationElements[x]);</span>
        }
&nbsp;
        /*
          if the playlist is not null and the song is null it's a playlist visualization
          element.
        */
<span class="cstat-no" title="statement not covered" >        if (playlist != null &amp;&amp; song == null) {</span>
<span class="cstat-no" title="statement not covered" >          displayPlaylistBackup(visualizationElements[x], playlist);</span>
        }
&nbsp;
        /*
          If the playlist is null and the song is not null it's a song visualization element.
        */
<span class="cstat-no" title="statement not covered" >        if (playlist == null &amp;&amp; song != null) {</span>
<span class="cstat-no" title="statement not covered" >          displaySongBackup(visualizationElements[x], song);</span>
        }
&nbsp;
        /*
          If the playlist and song are not null then it's a song in playlist visualization
          element.
        */
<span class="cstat-no" title="statement not covered" >        if (playlist != null &amp;&amp; song != null) {</span>
<span class="cstat-no" title="statement not covered" >          displaySongInPlaylistBackup(visualizationElements[x], playlist, song);</span>
        }
      }
    }
  }
&nbsp;
  /**
   * Displays the global backup which is the cover art of the image in the
   * visualization container.
   *
   * @param {node} element  - The element we are adding the background image to.
   */
  function <span class="fstat-no" title="function not covered" >displayGlobalBackup(</span>element) {
<span class="cstat-no" title="statement not covered" >    element.style.backgroundImage =</span>
      "url(" + config.active_metadata.cover_art_url + ")";
  }
&nbsp;
  /**
   * Displays the playlist backup which is the cover art of the image in the
   * visualization container.
   *
   * @param {node} element  - The element we are adding the background image to.
   */
  function <span class="fstat-no" title="function not covered" >displayPlaylistBackup(</span>element, playlist) {
<span class="cstat-no" title="statement not covered" >    if (config.active_playlist == playlist) {</span>
<span class="cstat-no" title="statement not covered" >      element.style.backgroundImage =</span>
        "url(" + config.active_metadata.cover_art_url + ")";
    }
  }
&nbsp;
  /**
   * Displays the song backup which is the cover art of the image in the
   * visualization container.
   *
   * @param {node} element  - The element we are adding the background image to.
   */
  function <span class="fstat-no" title="function not covered" >displaySongBackup(</span>element, song) {
<span class="cstat-no" title="statement not covered" >    if (config.active_index == song) {</span>
<span class="cstat-no" title="statement not covered" >      element.style.backgroundImage =</span>
        "url(" + config.active_metadata.cover_art_url + ")";
    }
  }
&nbsp;
  /**
   * Displays the song in playlist backup which is the cover art of the image in the
   * visualization container.
   *
   * @param {node} element  - The element we are adding the background image to.
   */
  function <span class="fstat-no" title="function not covered" >displaySongInPlaylistBackup(</span>element, playlist, song) {
<span class="cstat-no" title="statement not covered" >    if (</span>
      config.active_playlist == playlist &amp;&amp;
      config.playlists[active_playlist].active_index == song
    ) {
<span class="cstat-no" title="statement not covered" >      element.style.backgroundImage =</span>
        "url(" + config.active_metadata.cover_art_url + ")";
    }
  }
&nbsp;
  /*
    Returns the public facing methods
  */
  return {
    run: run,
    stop: stop,
    register: register
  };
})();
&nbsp;
export default Visualizations;
&nbsp;</pre></td></tr>
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