ABPCMS.Web/lib/chart.js/src/plugins/plugin.filler.js

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'use strict';

module.exports = function(Chart) {
	/**
	 * Plugin based on discussion from the following Chart.js issues:
	 * @see https://github.com/chartjs/Chart.js/issues/2380#issuecomment-279961569
	 * @see https://github.com/chartjs/Chart.js/issues/2440#issuecomment-256461897
	 */
	Chart.defaults.global.plugins.filler = {
		propagate: true
	};

	var defaults = Chart.defaults;
	var helpers = Chart.helpers;
	var mappers = {
		dataset: function(source) {
			var index = source.fill;
			var chart = source.chart;
			var meta = chart.getDatasetMeta(index);
			var visible = meta && chart.isDatasetVisible(index);
			var points = (visible && meta.dataset._children) || [];

			return !points.length? null : function(point, i) {
				return points[i]._view || null;
			};
		},

		boundary: function(source) {
			var boundary = source.boundary;
			var x = boundary? boundary.x : null;
			var y = boundary? boundary.y : null;

			return function(point) {
				return {
					x: x === null? point.x : x,
					y: y === null? point.y : y,
				};
			};
		}
	};

	// @todo if (fill[0] === '#')
	function decodeFill(el, index, count) {
		var model = el._model || {};
		var fill = model.fill;
		var target;

		if (fill === undefined) {
			fill = !!model.backgroundColor;
		}

		if (fill === false || fill === null) {
			return false;
		}

		if (fill === true) {
			return 'origin';
		}

		target = parseFloat(fill, 10);