music21j-port

<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>Music21j Source: music21/prebase.js</title>  <link type="text/css" rel="stylesheet" href="styles/sunlight.default.css"> <link type="text/css" rel="stylesheet" href="styles/site.spruce.css"> </head> <body> <div class="container-fluid"> <div class="navbar navbar-fixed-top navbar-inverse"> <div class="navbar-inner"> <a class="brand" href="index.html">Music21j</a> <ul class="nav"> <li class="dropdown"> <a href="namespaces.list.html" class="dropdown-toggle" data-toggle="dropdown">Namespaces<b class="caret"></b></a> <ul class="dropdown-menu "> <li> <a href="music21.html">music21</a> </li> <li> <a href="music21.articulations.html">music21.articulations</a> </li> <li> <a href="music21.audioSearch.html">music21.audioSearch</a> </li> <li> <a href="music21.base.html">music21.base</a> </li> <li> <a href="music21.beam.html">music21.beam</a> </li> <li> <a href="music21.chord.html">music21.chord</a> </li> <li> <a href="music21.clef.html">music21.clef</a> </li> <li> <a href="music21.common.html">music21.common</a> </li> <li> <a href="music21.duration.html">music21.duration</a> </li> <li> <a href="music21.dynamics.html">music21.dynamics</a> </li> <li> <a href="music21.expressions.html">music21.expressions</a> </li> <li> <a href="music21.fromPython.html">music21.fromPython</a> </li> <li> <a href="music21.instrument.html">music21.instrument</a> </li> <li> <a href="music21.interval.html">music21.interval</a> </li> <li> <a href="music21.key.html">music21.key</a> </li> <li> <a href="music21.keyboard.html">music21.keyboard</a> </li> <li> <a href="music21.meter.html">music21.meter</a> </li> <li> <a href="music21.miditools.html">music21.miditools</a> </li> <li> <a href="music21.note.html">music21.note</a> </li> <li> <a href="music21.pitch.html">music21.pitch</a> </li> <li> <a href="music21.prebase.html">music21.prebase</a> </li> <li> <a href="music21.renderOptions.html">music21.renderOptions</a> </li> <li> <a href="music21.roman.html">music21.roman</a> </li> <li> <a href="music21.scale.html">music21.scale</a> </li> <li> <a href="music21.sites.html">music21.sites</a> </li> <li> <a href="music21.stream.html">music21.stream</a> </li> <li> <a href="music21.tempo.html">music21.tempo</a> </li> <li> <a href="music21.tie.html">music21.tie</a> </li> <li> <a href="music21.tinyNotation.html">music21.tinyNotation</a> </li> <li> <a href="music21.vfShow.html">music21.vfShow</a> </li> <li> <a href="music21.webmidi.html">music21.webmidi</a> </li> </ul> </li> <li class="dropdown"> <a href="classes.list.html" class="dropdown-toggle" data-toggle="dropdown">Classes<b class="caret"></b></a> <ul class="dropdown-menu "> <li> <a href="music21.articulations.Accent.html">music21.articulations.Accent</a> </li> <li> <a href="music21.articulations.Articulation.html">music21.articulations.Articulation</a> </li> <li> <a href="music21.articulations.DynamicArticulation.html">music21.articulations.DynamicArticulation</a> </li> <li> <a href="music21.articulations.LengthArticulation.html">music21.articulations.LengthArticulation</a> </li> <li> <a href="music21.articulations.Marcato.html">music21.articulations.Marcato</a> </li> <li> <a href="music21.articulations.PitchArticulation.html">music21.articulations.PitchArticulation</a> </li> <li> <a href="music21.articulations.Spiccato.html">music21.articulations.Spiccato</a> </li> <li> <a href="music21.articulations.Staccatissimo.html">music21.articulations.Staccatissimo</a> </li> <li> <a href="music21.articulations.Staccato.html">music21.articulations.Staccato</a> </li> <li> <a href="music21.articulations.StrongAccent.html">music21.articulations.StrongAccent</a> </li> <li> <a href="music21.articulations.Tenuto.html">music21.articulations.Tenuto</a> </li> <li> <a href="music21.articulations.TimbreArticulation.html">music21.articulations.TimbreArticulation</a> </li> <li> <a href="music21.base.Music21Object.html">music21.base.Music21Object</a> </li> <li> <a href="music21.beam.Beam.html">music21.beam.Beam</a> </li> <li> <a href="music21.beam.Beams.html">music21.beam.Beams</a> </li> <li> <a href="music21.chord.Chord.html">music21.chord.Chord</a> </li> <li> <a href="music21.clef.AltoClef.html">music21.clef.AltoClef</a> </li> <li> <a href="music21.clef.BassClef.html">music21.clef.BassClef</a> </li> <li> <a href="music21.clef.Clef.html">music21.clef.Clef</a> </li> <li> <a href="music21.clef.MezzoSopranoClef.html">music21.clef.MezzoSopranoClef</a> </li> <li> <a href="music21.clef.PercussionClef.html">music21.clef.PercussionClef</a> </li> <li> <a href="music21.clef.SopranoClef.html">music21.clef.SopranoClef</a> </li> <li> <a href="music21.clef.TenorClef.html">music21.clef.TenorClef</a> </li> <li> <a href="music21.clef.Treble8vaClef.html">music21.clef.Treble8vaClef</a> </li> <li> <a href="music21.clef.Treble8vbClef.html">music21.clef.Treble8vbClef</a> </li> <li> <a href="music21.clef.TrebleClef.html">music21.clef.TrebleClef</a> </li> <li> <a href="music21.duration.Duration.html">music21.duration.Duration</a> </li> <li> <a href="music21.duration.Tuplet.html">music21.duration.Tuplet</a> </li> <li> <a href="music21.dynamics.Dynamic.html">music21.dynamics.Dynamic</a> </li> <li> <a href="music21.expressions.Expression.html">music21.expressions.Expression</a> </li> <li> <a href="music21.expressions.Fermata.html">music21.expressions.Fermata</a> </li> <li> <a href="music21.fromPython.Converter.html">music21.fromPython.Converter</a> </li> <li> <a href="music21.instrument.Instrument.html">music21.instrument.Instrument</a> </li> <li> <a href="music21.interval.ChromaticInterval.html">music21.interval.ChromaticInterval</a> </li> <li> <a href="music21.interval.DiatonicInterval.html">music21.interval.DiatonicInterval</a> </li> <li> <a href="music21.interval.GenericInterval.html">music21.interval.GenericInterval</a> </li> <li> <a href="music21.interval.Interval.html">music21.interval.Interval</a> </li> <li> <a href="music21.key.Key.html">music21.key.Key</a> </li> <li> <a href="music21.key.KeySignature.html">music21.key.KeySignature</a> </li> <li> <a href="music21.keyboard.BlackKey.html">music21.keyboard.BlackKey</a> </li> <li> <a href="music21.keyboard.Key.html">music21.keyboard.Key</a> </li> <li> <a href="music21.keyboard.Keyboard.html">music21.keyboard.Keyboard</a> </li> <li> <a href="music21.keyboard.WhiteKey.html">music21.keyboard.WhiteKey</a> </li> <li> <a href="music21.meter.TimeSignature.html">music21.meter.TimeSignature</a> </li> <li> <a href="music21.miditools.Event.html">music21.miditools.Event</a> </li> <li> <a href="music21.miditools.MidiPlayer.html">music21.miditools.MidiPlayer</a> </li> <li> <a href="music21.note.GeneralNote.html">music21.note.GeneralNote</a> </li> <li> <a href="music21.note.Lyric.html">music21.note.Lyric</a> </li> <li> <a href="music21.note.Note.html">music21.note.Note</a> </li> <li> <a href="music21.note.NotRest.html">music21.note.NotRest</a> </li> <li> <a href="music21.note.Rest.html">music21.note.Rest</a> </li> <li> <a href="music21.pitch.Accidental.html">music21.pitch.Accidental</a> </li> <li> <a href="music21.pitch.Pitch.html">music21.pitch.Pitch</a> </li> <li> <a href="music21.prebase.ProtoM21Object.html">music21.prebase.ProtoM21Object</a> </li> <li> <a href="music21.renderOptions.RenderOptions.html">music21.renderOptions.RenderOptions</a> </li> <li> <a href="music21.roman.RomanNumeral.html">music21.roman.RomanNumeral</a> </li> <li> <a href="music21.stream.Measure.html">music21.stream.Measure</a> </li> <li> <a href="music21.stream.Part.html">music21.stream.Part</a> </li> <li> <a href="music21.stream.Score.html">music21.stream.Score</a> </li> <li> <a href="music21.stream.Stream.html">music21.stream.Stream</a> </li> <li> <a href="music21.stream.Voice.html">music21.stream.Voice</a> </li> <li> <a href="music21.tempo.Metronome.html">music21.tempo.Metronome</a> </li> <li> <a href="music21.tie.Tie.html">music21.tie.Tie</a> </li> <li> <a href="music21.vfShow.Renderer.html">music21.vfShow.Renderer</a> </li> <li> <a href="music21.vfShow.RenderStack.html">music21.vfShow.RenderStack</a> </li> <li> <a href="Notation.html">Notation</a> </li> <li> <a href="Page.html">Page</a> </li> <li> <a href="Recorder.html">Recorder</a> </li> </ul> </li> <li class="dropdown"> <a href="global.html" class="dropdown-toggle" data-toggle="dropdown">Global<b class="caret"></b></a> <ul class="dropdown-menu "> <li> <a href="global.html#getM21attribute">getM21attribute</a> </li> <li> <a href="global.html#layout">layout</a> </li> <li> <a href="global.html#midiNumDiffFromFrequency">midiNumDiffFromFrequency</a> </li> <li> <a href="global.html#recorderWorkerJs">recorderWorkerJs</a> </li> <li> <a href="global.html#unpickler">unpickler</a> </li> <li> <a href="global.html#warnBanner">warnBanner</a> </li> </ul> </li> </ul> </div> </div> <div class="row-fluid"> <div class="span12"> <div id="main"> <h1 class="page-title">Source: music21/prebase.js</h1> <section> <article> <pre class="sunlight-highlight-javascript linenums">/** * module for things that all music21-created objects, not just objects that can live in * Stream.elements should inherit. See the {@link music21.prebase} namespace. * Copyright (c) 2013-17, Michael Scott Cuthbert and cuthbertLab * * @exports music21/prebase */ /** * module for things that all music21-created objects, not just objects that can live in * Stream.elements should inherit * * @namespace music21.prebase * @memberof music21 */ export const prebase = {}; /** * Class for pseudo-m21 objects to inherit from. The most important attributes that nearly * everything in music21 should inherit from are given below. * * @class ProtoM21Object * @memberof music21.prebase * @property {Array<string>} classes - An Array of strings of classes that the object belongs to (default ['ProtoM21Object']) * @property {Boolean} isProtoM21Object - Does this object descend from {@link music21.prebase.ProtoM21Object}: obviously true. * @property {Boolean} isMusic21Object - Does this object descend from {@link music21.base.Music21Object}; default false. */ export class ProtoM21Object { constructor() { this._storedClasses = undefined; this.isProtoM21Object = true; this.isMusic21Object = false; this._cloneCallbacks = {}; } get classes() { if (this._storedClasses !== undefined) { return this._storedClasses; } const classList = []; let thisConstructor = this.constructor; let maxLinks = 20; while ( thisConstructor !== null && thisConstructor !== undefined && maxLinks ) { maxLinks -= 1; if (thisConstructor.name === '') { break; } classList.push(thisConstructor.name); thisConstructor = Object.getPrototypeOf(thisConstructor); } classList.push('object'); this._storedClasses = classList; return classList; } /** * Makes (as much as possible) a complete duplicate copy of the object called with .clone() * * Works similarly to Python's copy.deepcopy(). * * Every ProtoM21Object has a `._cloneCallbacks` object which maps `{attribute: callbackFunction}` * to handle custom clone cases. See, for instance, {@link music21.base.Music21Object} which * uses a custom callback to NOT clone the `.activeSite` attribute. * * @returns {Object} * @memberof music21.prebase.ProtoM21Object * @example * var n1 = new music21.note.Note("C#"); * n1.duration.quarterLength = 4; * var n2 = n1.clone(); * n2.duration.quarterLength == 4; // true * n2 === n1; // false */ clone(deep = true) { if (!deep) { return Object.assign( Object.create(Object.getPrototypeOf(this)), this ); } const ret = new this.constructor(); // todo: do Arrays work? for (const key in this) { // not that we ONLY copy the keys in Ret -- it's easier that way. if ({}.hasOwnProperty.call(this, key) === false) { continue; } if (key in this._cloneCallbacks) { if (this._cloneCallbacks[key] === true) { ret[key] = this[key]; } else if (this._cloneCallbacks[key] === false) { ret[key] = undefined; } else { // call the cloneCallbacks function this._cloneCallbacks[key](key, ret, this); } } else if ( Object.getOwnPropertyDescriptor(this, key).get !== undefined || Object.getOwnPropertyDescriptor(this, key).set !== undefined ) { // do nothing } else if (typeof this[key] === 'function') { // do nothing -- events might not be copied. } else if ( typeof this[key] === 'object' && this[key] !== null && this[key].isProtoM21Object ) { // console.log('cloning ', key); ret[key] = this[key].clone(); } else { try { ret[key] = this[key]; // music21.common.merge(ret[key], this[key]); // not really necessary? } catch (e) { if (e instanceof TypeError) { console.log('typeError:', e, key); // do nothing } else { throw e; } } } } return ret; } /** * Check to see if an object is of this class or subclass. * * @memberof music21.prebase.ProtoM21Object * @param {(string|string[])} testClass - a class or Array of classes to test * @returns {Boolean} * @example * var n = new music21.note.Note(); * n.isClassOrSubclass('Note'); // true * n.isClassOrSubclass('Music21Object'); // true * n.isClassOrSubclass(['Duration', 'NotRest']); // true // NotRest */ isClassOrSubclass(testClass) { if (testClass instanceof Array === false) { testClass = [testClass]; } for (let i = 0; i < testClass.length; i++) { if (this.classes.includes(testClass[i])) { return true; } } return false; } } prebase.ProtoM21Object = ProtoM21Object; </pre> </article> </section> </div> <div class="clearfix"></div> <footer> <span class="copyright"> Music21j, Copyright © 2013-2018 Michael Scott Cuthbert and cuthbertLab. </span> <br /> <span class="jsdoc-message"> Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Wed Jul 4th 2018 using the <a href="https://github.com/terryweiss/docstrap">DocStrap template</a>. </span> </footer> </div> <br clear="both"> </div> </div>  <script src="scripts/docstrap.lib.js"></script> <script src="scripts/bootstrap-dropdown.js"></script> <script src="scripts/toc.js"></script> <script> $( function () { $( "[id*='$']" ).each( function () { var $this = $( this ); $this.attr( "id", $this.attr( "id" ).replace( "$", "__" ) ); } ); $( "#toc" ).toc( { anchorName : function ( i, heading, prefix ) { return $( heading ).attr( "id" ) || ( prefix + i ); }, selectors : "h1,h2,h3,h4", showAndHide : false, scrollTo : "100px" } ); $( "#toc>ul" ).addClass( "nav nav-pills nav-stacked" ); $( "#main span[id^='toc']" ).addClass( "toc-shim" ); $( '.dropdown-toggle' ).dropdown(); // $( ".tutorial-section pre, .readme-section pre" ).addClass( "sunlight-highlight-javascript" ).addClass( "linenums" ); $( ".tutorial-section pre, .readme-section pre" ).each( function () { var $this = $( this ); var example = $this.find( "code" ); exampleText = example.html(); var lang = /{@lang (.*?)}/.exec( exampleText ); if ( lang && lang[1] ) { exampleText = exampleText.replace( lang[0], "" ); example.html( exampleText ); lang = lang[1]; } else { lang = "javascript"; } if ( lang ) { $this .addClass( "sunlight-highlight-" + lang ) .addClass( "linenums" ) .html( example.html() ); } } ); Sunlight.highlightAll( { lineNumbers : true, showMenu : true, enableDoclinks : true } ); } ); </script>   </body> </html>