music21j-port

<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>Music21j Source: music21/sites.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 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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/sites.js</h1> <section> <article> <pre class="sunlight-highlight-javascript linenums">/** * Objects for keeping track of relationships among Music21Objects. See {@link music21.sites} namespace * * Copyright 2017, Michael Scott Cuthbert and cuthbertLab * License: BSD */ import { common } from './common.js'; import { Music21Exception } from './exceptions21'; /** * @namespace music21.sites * @memberof music21 * @requires music21/common */ export const sites = {}; export class SitesException extends Music21Exception {} sites.SitesException = SitesException; export class SiteRef { constructor() { this.isDead = false; this.classString = undefined; this.globalSiteIndex = false; this.siteIndex = undefined; this.siteWeakref = new WeakMap(); this.siteWeakref.ref = undefined; } get site() { return this.siteWeakref.ref; } set site(newSite) { this.siteWeakref.ref = newSite; } } sites.SiteRef = SiteRef; const _NoneSiteRef = new SiteRef(); _NoneSiteRef.globalSiteIndex = -2; _NoneSiteRef.siteIndex = -2; const _singletonCounter = new common.SingletonCounter(); const GLOBAL_SITE_STATE_DICT = new WeakMap(); sites.getId = function getId(obj) { if (!GLOBAL_SITE_STATE_DICT.has(obj)) { const newId = _singletonCounter.call(); GLOBAL_SITE_STATE_DICT.set(obj, newId); } return GLOBAL_SITE_STATE_DICT.get(obj); }; export class Sites { constructor() { this.siteDict = new Map(); this.siteDict.set(_NoneSiteRef.siteIndex, _NoneSiteRef); this._siteIndex = 0; this._lastID = -1; } get length() { return this.siteDict.size; } includes(checkSite) { for (const [unused_key, siteRef] of this.siteDict) { if (siteRef.site === checkSite) { return true; } } return false; } _keysByTime(newFirst = true) { const post = []; for (const [key, siteRef] of this.siteDict) { const keyVal = [siteRef.siteIndex, key]; post.push(keyVal); } post.sort(); if (newFirst) { post.reverse(); } return post.map(innerList => innerList[1]); } add(obj, idKey, classString) { if (idKey === undefined && obj !== undefined) { idKey = sites.getId(obj); } let updateNotAdd = false; if (this.siteDict.has(idKey)) { const tempSiteRef = this.siteDict.get(idKey); if (!tempSiteRef.isDead && tempSiteRef.site !== undefined) { updateNotAdd = true; } } if (obj !== undefined && classString === undefined) { classString = obj.classes[0]; } let siteRef; if (updateNotAdd) { siteRef = this.siteDict.get(idKey); siteRef.isDead = false; } else { siteRef = new SiteRef(); } siteRef.site = obj; // stores a weakRef; siteRef.classString = classString; siteRef.siteIndex = this._siteIndex; this._siteIndex += 1; siteRef.globalSiteIndex = _singletonCounter.call(); if (!updateNotAdd) { this.siteDict.set(idKey, siteRef); } } remove(obj) { const idKey = sites.getId(obj); if (idKey === undefined) { return false; } return this.siteDict.delete(idKey); } clear() { this.siteDict = new Map(); this.siteDict.set(_NoneSiteRef.siteIndex, _NoneSiteRef); this._lastID = -1; } * yieldSites( sortByCreationTime = false, priorityTarget, excludeNone = false ) { let keyRepository; if (sortByCreationTime === true) { keyRepository = this._keysByTime(false); } else if (sortByCreationTime === 'reverse') { keyRepository = this._keysByTime(true); } else { keyRepository = Array.from(this.siteDict.keys()); } if (priorityTarget !== undefined) { const priorityId = sites.getId(priorityTarget); if (keyRepository.includes(priorityId)) { keyRepository.splice( 0, 0, keyRepository.pop(keyRepository.indexOf(priorityId)) ); } } for (const key of keyRepository) { const siteRef = this.siteDict.get(key); if (siteRef === _NoneSiteRef) { if (!excludeNone) { yield siteRef.site; } } else { const obj = siteRef.site; if (obj === undefined) { siteRef.isDead = true; } else { yield obj; } } } } get(sortByCreationTime = false, priorityTarget, excludeNone = false) { const post = Array.from( this.yieldSites(sortByCreationTime, priorityTarget, excludeNone) ); // we do this resorting again, because the priority target might not match id and we // want to be extra safe. If you want fast, use .yieldSites if (priorityTarget !== undefined) { if (post.includes(priorityTarget)) { post.splice(0, 0, post.pop(post.indexOf(priorityTarget))); } } return post; } getAttrByName(attrName) { for (const obj of this.yieldSites('reverse')) { if (obj === undefined) { continue; } if (attrName in obj) { return obj[attrName]; } } return undefined; } getObjByClass(className, options) { const params = { callerFirst: this, sortByCreationTime: false, priorityTarget: undefined, getElementMethod: 'getElementAtOrBefore', memo: {}, }; common.merge(params, options); const memo = params.memo; let post; const objs = Array.from( this.yieldSites( params.sortByCreationTime, params.priorityTarget, true // excludeNone ) ); const classNameIsStr = typeof className === 'string'; for (const obj of objs) { if (classNameIsStr) { if (obj.classes.includes(className)) { post = obj; break; } } else if (obj instanceof className) { post = obj; break; } } if (post !== undefined) { return post; } for (const obj of objs) { // TODO: check inside object... perhaps should not be done in m21p const objId = sites.getId(obj); if (!(objId in memo)) { memo[objId] = obj; } post = obj.getContextByClass(className, params); if (post !== undefined) { break; } } return post; } } sites.Sites = Sites; </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>