satie
Version:
A sheet music renderer for the web
65 lines (64 loc) • 3.14 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 invariant = require("invariant");
var document_1 = require("./document");
/**
* Centers elements marked as such
*
* @returns new end of line
*/
function center(options, bounds, measures) {
lodash_1.forEach(measures, function (measure, measureIdx) {
var maxIdx = lodash_1.max(lodash_1.map(measure.elements, function (el) { return el.length; }));
lodash_1.times(maxIdx, function (j) {
for (var i = 0; i < measure.elements.length; ++i) {
if (measure.elements[i][j].expandPolicy === "centered") {
var intrinsicWidth = measure.elements[i][j].renderedWidth;
invariant(isFinite(intrinsicWidth), "Intrinsic width must be set on centered items");
var measureSpaceRemaining = void 0;
var attribIdx = lodash_1.findIndex(measure.elements[0], function (el) { return el.renderClass === document_1.Type.Attributes && el.renderedWidth > 0; });
var base = 0;
if (attribIdx !== -1 && attribIdx < j) {
base = measure.elements[0][attribIdx].overrideX +
measure.elements[0][attribIdx].renderedWidth;
measureSpaceRemaining = lodash_1.last(measure.elements[i]).overrideX - base;
}
else if (measures[measureIdx - 1]) {
measureSpaceRemaining = lodash_1.last(measure.elements[i]).overrideX -
(measures[measureIdx - 1].width -
lodash_1.last(measures[measureIdx - 1].elements[0]).overrideX);
}
else {
measureSpaceRemaining = lodash_1.last(measure.elements[i]).overrideX;
}
if (measures[measureIdx + 1] && measures[measureIdx + 1].width === 0) {
measureSpaceRemaining += 16.6;
}
measure.elements[i][j].x =
base + measureSpaceRemaining / 2 -
intrinsicWidth / 2;
}
}
});
});
return measures;
}
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = center;