satie
Version:
A sheet music renderer for the web
70 lines (69 loc) • 2.54 kB
JavaScript
/**
* This file is part of Satie music engraver <https://github.com/jnetterf/satie>.
* Copyright (C) Joshua Netterfield <joshua.ca> 2015 - present.
*
* Satie is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* Satie 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Satie. If not, see <http://www.gnu.org/licenses/>.
*/
;
var lodash_1 = require("lodash");
var private_util_1 = require("./private_util");
var document_1 = require("./document");
/**
* Given a set of segments, scales divisions so that they are compatible.
*
* Returns the division count.
*/
function normalizeDivisionsInPlace(factory, segments, factor) {
if (factor === void 0) { factor = 0; }
var divisions = factor || lodash_1.reduce(segments, function (div1, seg) {
if (!div1) {
return 1;
}
return private_util_1.lcm(div1, seg.divisions);
}, 0);
lodash_1.forEach(segments, function (segment) {
if (!segment) {
return;
}
var ratio = divisions / segment.divisions;
segment.divisions = divisions;
lodash_1.forEach(segment, function (model) {
if (model.divCount) {
model.divCount *= ratio;
}
if (factory.modelHasType(model, document_1.Type.Chord)) {
lodash_1.forEach(model, function (note) {
if (note.duration) {
note.duration *= ratio;
}
});
}
if (factory.modelHasType(model, document_1.Type.Attributes)) {
// This could be an attributes item or a note.
if (model.divisions) {
ratio = divisions / model.divisions;
}
try {
model.divisions = divisions;
}
catch (err) {
console.warn("Could not set divisions");
}
}
});
});
return divisions;
}
exports.normalizeDivisionsInPlace = normalizeDivisionsInPlace;
;