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static/lib/Highcharts-10.2.1/es-modules/Stock/Indicators/WMA/WMAIndicator.js

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+/* *
+ *
+ *  (c) 2010-2021 Kacper Madej
+ *
+ *  License: www.highcharts.com/license
+ *
+ *  !!!!!!! SOURCE GETS TRANSPILED BY TYPESCRIPT. EDIT TS FILE ONLY. !!!!!!!
+ *
+ * */
+'use strict';
+var __extends = (this && this.__extends) || (function () {
+    var extendStatics = function (d, b) {
+        extendStatics = Object.setPrototypeOf ||
+            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
+        return extendStatics(d, b);
+    };
+    return function (d, b) {
+        if (typeof b !== "function" && b !== null)
+            throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
+        extendStatics(d, b);
+        function __() { this.constructor = d; }
+        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+    };
+})();
+import SeriesRegistry from '../../../Core/Series/SeriesRegistry.js';
+var SMAIndicator = SeriesRegistry.seriesTypes.sma;
+import U from '../../../Core/Utilities.js';
+var isArray = U.isArray, merge = U.merge;
+/* *
+ *
+ *  Functions
+ *
+ * */
+// Utils:
+/**
+ * @private
+ */
+function accumulateAverage(points, xVal, yVal, i, index) {
+    var xValue = xVal[i], yValue = index < 0 ? yVal[i] : yVal[i][index];
+    points.push([xValue, yValue]);
+}
+/**
+ * @private
+ */
+function weightedSumArray(array, pLen) {
+    // The denominator is the sum of the number of days as a triangular number.
+    // If there are 5 days, the triangular numbers are 5, 4, 3, 2, and 1.
+    // The sum is 5 + 4 + 3 + 2 + 1 = 15.
+    var denominator = (pLen + 1) / 2 * pLen;
+    // reduce VS loop => reduce
+    return array.reduce(function (prev, cur, i) {
+        return [null, prev[1] + cur[1] * (i + 1)];
+    })[1] / denominator;
+}
+/**
+ * @private
+ */
+function populateAverage(points, xVal, yVal, i) {
+    var pLen = points.length, wmaY = weightedSumArray(points, pLen), wmaX = xVal[i - 1];
+    points.shift(); // remove point until range < period
+    return [wmaX, wmaY];
+}
+/* *
+ *
+ *  Class
+ *
+ * */
+/**
+ * The SMA series type.
+ *
+ * @private
+ * @class
+ * @name Highcharts.seriesTypes.wma
+ *
+ * @augments Highcharts.Series
+ */
+var WMAIndicator = /** @class */ (function (_super) {
+    __extends(WMAIndicator, _super);
+    function WMAIndicator() {
+        /* *
+         *
+         *  Static Properties
+         *
+         * */
+        var _this = _super !== null && _super.apply(this, arguments) || this;
+        /* *
+         *
+         *  Properties
+         *
+         * */
+        _this.data = void 0;
+        _this.options = void 0;
+        _this.points = void 0;
+        return _this;
+    }
+    /* *
+     *
+     *  Functions
+     *
+     * */
+    WMAIndicator.prototype.getValues = function (series, params) {
+        var period = params.period, xVal = series.xData, yVal = series.yData, yValLen = yVal ? yVal.length : 0, range = 1, xValue = xVal[0], yValue = yVal[0], WMA = [], xData = [], yData = [], index = -1, i, points, WMAPoint;
+        if (xVal.length < period) {
+            return;
+        }
+        // Switch index for OHLC / Candlestick
+        if (isArray(yVal[0])) {
+            index = params.index;
+            yValue = yVal[0][index];
+        }
+        // Starting point
+        points = [[xValue, yValue]];
+        // Accumulate first N-points
+        while (range !== period) {
+            accumulateAverage(points, xVal, yVal, range, index);
+            range++;
+        }
+        // Calculate value one-by-one for each period in visible data
+        for (i = range; i < yValLen; i++) {
+            WMAPoint = populateAverage(points, xVal, yVal, i);
+            WMA.push(WMAPoint);
+            xData.push(WMAPoint[0]);
+            yData.push(WMAPoint[1]);
+            accumulateAverage(points, xVal, yVal, i, index);
+        }
+        WMAPoint = populateAverage(points, xVal, yVal, i);
+        WMA.push(WMAPoint);
+        xData.push(WMAPoint[0]);
+        yData.push(WMAPoint[1]);
+        return {
+            values: WMA,
+            xData: xData,
+            yData: yData
+        };
+    };
+    /**
+     * Weighted moving average indicator (WMA). This series requires `linkedTo`
+     * option to be set.
+     *
+     * @sample stock/indicators/wma
+     *         Weighted moving average indicator
+     *
+     * @extends      plotOptions.sma
+     * @since        6.0.0
+     * @product      highstock
+     * @requires     stock/indicators/indicators
+     * @requires     stock/indicators/wma
+     * @optionparent plotOptions.wma
+     */
+    WMAIndicator.defaultOptions = merge(SMAIndicator.defaultOptions, {
+        params: {
+            index: 3,
+            period: 9
+        }
+    });
+    return WMAIndicator;
+}(SMAIndicator));
+SeriesRegistry.registerSeriesType('wma', WMAIndicator);
+/* *
+ *
+ *  Default Export
+ *
+ * */
+export default WMAIndicator;
+/* *
+ *
+ *  API Options
+ *
+ * */
+/**
+ * A `WMA` series. If the [type](#series.wma.type) option is not specified, it
+ * is inherited from [chart.type](#chart.type).
+ *
+ * @extends   series,plotOptions.wma
+ * @since     6.0.0
+ * @product   highstock
+ * @excluding dataParser, dataURL
+ * @requires  stock/indicators/indicators
+ * @requires  stock/indicators/wma
+ * @apioption series.wma
+ */
+''; // adds doclet above to the transpiled file