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// mdnn.js - module to output Modernised Diatonic Numerical Notation
// (https://medium.com/@info_70544/the-case-for-numerical-music-notation-part-1-introduction-and-history-5f1543ca8a95)
//
// Copyright (C) 2020-2023 Jean-Francois Moine
//
// This file is part of abc2svg.
//
// abc2svg is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// abc2svg is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with abc2svg.  If not, see <http://www.gnu.org/licenses/>.
//
// This module is loaded when "%%mdnn" appears in a ABC source.
//
// Parameters
//	(none)
//
//fixme:nsk
// - Non Standard Key signature - other way to display the accidentals on key change

// polyfill
if (typeof Object.assign !== 'function') {
  // Must be writable: true, enumerable: false, configurable: true
  Object.defineProperty(Object, "assign", {
    value: function assign(target, varArgs) { // .length of function is 2
      'use strict';
      if (target === null || target === undefined) {
        throw new TypeError('Cannot convert undefined or null to object');
      }

      var to = Object(target);

      for (var index = 1; index < arguments.length; index++) {
        var nextSource = arguments[index];

        if (nextSource !== null && nextSource !== undefined) { 
          for (var nextKey in nextSource) {
            // Avoid bugs when hasOwnProperty is shadowed
            if (Object.prototype.hasOwnProperty.call(nextSource, nextKey)) {
              to[nextKey] = nextSource[nextKey];
            }
          }
        }
      }
      return to;
    },
    writable: true,
    configurable: true
  });
}

if (typeof abc2svg == "undefined")
    var	abc2svg = {}

abc2svg.mdnn = {

  cde2fcg: new Int8Array([0, 2, 4, -1, 1, 3, 5]),
  cgd2cde: new Int8Array([0, -4, -1, -5, -2, -6, -3,
			  0, -4, -1, -5, -2, -6, -3, 0]),
  acc_tb: ["aff", "af", "n", "s", "ss"],

  glyphs: {
	n1: '<text id="n1" class="bn" x="-1.5" y="16">1</text>',
	n2: '<text id="n2" class="bn" x="-1.5" y="16">2</text>',
	n3: '<text id="n3" class="bn" x="-1.5" y="16">3</text>',
	n4: '<text id="n4" class="bn" x="-1.5" y="16">4</text>',
	n5: '<text id="n5" class="bn" x="-1.5" y="16">5</text>',
	n6: '<text id="n6" class="bn" x="-1.5" y="16">6</text>',
	n7: '<text id="n7" class="bn" x="-1.5" y="16">7</text>',
	nq: '<text id="nq" class="bn" x="8" y="16">\'</text>',
	nc: '<text id="nc" class="bn" x="8" y="16">,</text>',
	nh: '<path id="nh" class="stroke" d="m3.5 0l-7.2 0 0 -6.2 7.2 0"/>',
	nw: '<path id="nw" class="stroke" d="m6 -5l-7.2 0 0 -6.2 7.2 0 0 6.2"/>',
	aff: '<text id="aff" class="music" x="-8" y="11">&#xe264;</text>',
	af: '<text id="af" class="music" x="-8" y="11">&#xe260;</text>',
	nn: '<text id="nn" class="music" x="-8" y="11">&#xe261;</text>',
	ns: '<text id="ns" class="music" x="-8" y="11">&#xe262;</text>',
	nss: '<text id="nss" class="music" x="-8" y="11">&#xe263;</text>'
  }, //glyphs

  decos: {
	n1: "9 n1 0 0 0",
	n2: "9 n2 0 0 0",
	n3: "9 n3 0 0 0",
	n4: "9 n4 0 0 0",
	n5: "9 n5 0 0 0",
	n6: "9 n6 0 0 0",
	n7: "9 n7 0 0 0",