586 lines
16 KiB
JavaScript
586 lines
16 KiB
JavaScript
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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var zrUtil = require("zrender/lib/core/util");
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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/*
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* A third-party license is embeded for some of the code in this file:
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* The method "quantile" was copied from "d3.js".
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* (See more details in the comment of the method below.)
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* The use of the source code of this file is also subject to the terms
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* and consitions of the license of "d3.js" (BSD-3Clause, see
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* </licenses/LICENSE-d3>).
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*/
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var RADIAN_EPSILON = 1e-4;
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function _trim(str) {
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return str.replace(/^\s+|\s+$/g, '');
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}
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/**
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* Linear mapping a value from domain to range
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* @memberOf module:echarts/util/number
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* @param {(number|Array.<number>)} val
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* @param {Array.<number>} domain Domain extent domain[0] can be bigger than domain[1]
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* @param {Array.<number>} range Range extent range[0] can be bigger than range[1]
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* @param {boolean} clamp
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* @return {(number|Array.<number>}
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*/
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function linearMap(val, domain, range, clamp) {
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var subDomain = domain[1] - domain[0];
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var subRange = range[1] - range[0];
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if (subDomain === 0) {
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return subRange === 0 ? range[0] : (range[0] + range[1]) / 2;
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} // Avoid accuracy problem in edge, such as
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// 146.39 - 62.83 === 83.55999999999999.
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// See echarts/test/ut/spec/util/number.js#linearMap#accuracyError
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// It is a little verbose for efficiency considering this method
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// is a hotspot.
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if (clamp) {
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if (subDomain > 0) {
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if (val <= domain[0]) {
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return range[0];
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} else if (val >= domain[1]) {
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return range[1];
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}
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} else {
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if (val >= domain[0]) {
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return range[0];
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} else if (val <= domain[1]) {
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return range[1];
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}
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}
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} else {
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if (val === domain[0]) {
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return range[0];
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}
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if (val === domain[1]) {
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return range[1];
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}
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}
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return (val - domain[0]) / subDomain * subRange + range[0];
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}
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/**
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* Convert a percent string to absolute number.
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* Returns NaN if percent is not a valid string or number
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* @memberOf module:echarts/util/number
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* @param {string|number} percent
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* @param {number} all
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* @return {number}
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*/
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function parsePercent(percent, all) {
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switch (percent) {
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case 'center':
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case 'middle':
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percent = '50%';
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break;
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case 'left':
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case 'top':
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percent = '0%';
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break;
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case 'right':
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case 'bottom':
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percent = '100%';
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break;
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}
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if (typeof percent === 'string') {
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if (_trim(percent).match(/%$/)) {
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return parseFloat(percent) / 100 * all;
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}
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return parseFloat(percent);
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}
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return percent == null ? NaN : +percent;
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}
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/**
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* (1) Fix rounding error of float numbers.
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* (2) Support return string to avoid scientific notation like '3.5e-7'.
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*
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* @param {number} x
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* @param {number} [precision]
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* @param {boolean} [returnStr]
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* @return {number|string}
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*/
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function round(x, precision, returnStr) {
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if (precision == null) {
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precision = 10;
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} // Avoid range error
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precision = Math.min(Math.max(0, precision), 20);
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x = (+x).toFixed(precision);
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return returnStr ? x : +x;
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}
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/**
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* asc sort arr.
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* The input arr will be modified.
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*
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* @param {Array} arr
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* @return {Array} The input arr.
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*/
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function asc(arr) {
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arr.sort(function (a, b) {
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return a - b;
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});
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return arr;
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}
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/**
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* Get precision
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* @param {number} val
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*/
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function getPrecision(val) {
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val = +val;
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if (isNaN(val)) {
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return 0;
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} // It is much faster than methods converting number to string as follows
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// var tmp = val.toString();
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// return tmp.length - 1 - tmp.indexOf('.');
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// especially when precision is low
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var e = 1;
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var count = 0;
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while (Math.round(val * e) / e !== val) {
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e *= 10;
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count++;
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}
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return count;
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}
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/**
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* @param {string|number} val
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* @return {number}
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*/
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function getPrecisionSafe(val) {
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var str = val.toString(); // Consider scientific notation: '3.4e-12' '3.4e+12'
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var eIndex = str.indexOf('e');
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if (eIndex > 0) {
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var precision = +str.slice(eIndex + 1);
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return precision < 0 ? -precision : 0;
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} else {
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var dotIndex = str.indexOf('.');
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return dotIndex < 0 ? 0 : str.length - 1 - dotIndex;
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}
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}
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/**
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* Minimal dicernible data precisioin according to a single pixel.
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*
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* @param {Array.<number>} dataExtent
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* @param {Array.<number>} pixelExtent
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* @return {number} precision
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*/
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function getPixelPrecision(dataExtent, pixelExtent) {
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var log = Math.log;
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var LN10 = Math.LN10;
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var dataQuantity = Math.floor(log(dataExtent[1] - dataExtent[0]) / LN10);
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var sizeQuantity = Math.round(log(Math.abs(pixelExtent[1] - pixelExtent[0])) / LN10); // toFixed() digits argument must be between 0 and 20.
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var precision = Math.min(Math.max(-dataQuantity + sizeQuantity, 0), 20);
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return !isFinite(precision) ? 20 : precision;
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}
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/**
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* Get a data of given precision, assuring the sum of percentages
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* in valueList is 1.
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* The largest remainer method is used.
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* https://en.wikipedia.org/wiki/Largest_remainder_method
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*
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* @param {Array.<number>} valueList a list of all data
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* @param {number} idx index of the data to be processed in valueList
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* @param {number} precision integer number showing digits of precision
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* @return {number} percent ranging from 0 to 100
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*/
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function getPercentWithPrecision(valueList, idx, precision) {
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if (!valueList[idx]) {
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return 0;
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}
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var sum = zrUtil.reduce(valueList, function (acc, val) {
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return acc + (isNaN(val) ? 0 : val);
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}, 0);
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if (sum === 0) {
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return 0;
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}
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var digits = Math.pow(10, precision);
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var votesPerQuota = zrUtil.map(valueList, function (val) {
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return (isNaN(val) ? 0 : val) / sum * digits * 100;
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});
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var targetSeats = digits * 100;
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var seats = zrUtil.map(votesPerQuota, function (votes) {
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// Assign automatic seats.
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return Math.floor(votes);
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});
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var currentSum = zrUtil.reduce(seats, function (acc, val) {
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return acc + val;
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}, 0);
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var remainder = zrUtil.map(votesPerQuota, function (votes, idx) {
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return votes - seats[idx];
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}); // Has remainding votes.
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while (currentSum < targetSeats) {
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// Find next largest remainder.
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var max = Number.NEGATIVE_INFINITY;
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var maxId = null;
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for (var i = 0, len = remainder.length; i < len; ++i) {
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if (remainder[i] > max) {
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max = remainder[i];
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maxId = i;
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}
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} // Add a vote to max remainder.
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++seats[maxId];
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remainder[maxId] = 0;
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++currentSum;
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}
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return seats[idx] / digits;
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} // Number.MAX_SAFE_INTEGER, ie do not support.
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var MAX_SAFE_INTEGER = 9007199254740991;
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/**
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* To 0 - 2 * PI, considering negative radian.
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* @param {number} radian
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* @return {number}
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*/
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function remRadian(radian) {
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var pi2 = Math.PI * 2;
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return (radian % pi2 + pi2) % pi2;
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}
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/**
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* @param {type} radian
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* @return {boolean}
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*/
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function isRadianAroundZero(val) {
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return val > -RADIAN_EPSILON && val < RADIAN_EPSILON;
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}
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/* eslint-disable */
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var TIME_REG = /^(?:(\d{4})(?:[-\/](\d{1,2})(?:[-\/](\d{1,2})(?:[T ](\d{1,2})(?::(\d\d)(?::(\d\d)(?:[.,](\d+))?)?)?(Z|[\+\-]\d\d:?\d\d)?)?)?)?)?$/; // jshint ignore:line
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/* eslint-enable */
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/**
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* @param {string|Date|number} value These values can be accepted:
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* + An instance of Date, represent a time in its own time zone.
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* + Or string in a subset of ISO 8601, only including:
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* + only year, month, date: '2012-03', '2012-03-01', '2012-03-01 05', '2012-03-01 05:06',
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* + separated with T or space: '2012-03-01T12:22:33.123', '2012-03-01 12:22:33.123',
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* + time zone: '2012-03-01T12:22:33Z', '2012-03-01T12:22:33+8000', '2012-03-01T12:22:33-05:00',
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* all of which will be treated as local time if time zone is not specified
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* (see <https://momentjs.com/>).
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* + Or other string format, including (all of which will be treated as loacal time):
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* '2012', '2012-3-1', '2012/3/1', '2012/03/01',
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* '2009/6/12 2:00', '2009/6/12 2:05:08', '2009/6/12 2:05:08.123'
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* + a timestamp, which represent a time in UTC.
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* @return {Date} date
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*/
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function parseDate(value) {
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if (value instanceof Date) {
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return value;
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} else if (typeof value === 'string') {
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// Different browsers parse date in different way, so we parse it manually.
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// Some other issues:
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// new Date('1970-01-01') is UTC,
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// new Date('1970/01/01') and new Date('1970-1-01') is local.
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// See issue #3623
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var match = TIME_REG.exec(value);
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if (!match) {
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// return Invalid Date.
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return new Date(NaN);
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} // Use local time when no timezone offset specifed.
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if (!match[8]) {
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// match[n] can only be string or undefined.
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// But take care of '12' + 1 => '121'.
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return new Date(+match[1], +(match[2] || 1) - 1, +match[3] || 1, +match[4] || 0, +(match[5] || 0), +match[6] || 0, +match[7] || 0);
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} // Timezoneoffset of Javascript Date has considered DST (Daylight Saving Time,
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// https://tc39.github.io/ecma262/#sec-daylight-saving-time-adjustment).
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// For example, system timezone is set as "Time Zone: America/Toronto",
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// then these code will get different result:
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// `new Date(1478411999999).getTimezoneOffset(); // get 240`
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// `new Date(1478412000000).getTimezoneOffset(); // get 300`
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// So we should not use `new Date`, but use `Date.UTC`.
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else {
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var hour = +match[4] || 0;
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if (match[8].toUpperCase() !== 'Z') {
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hour -= match[8].slice(0, 3);
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}
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return new Date(Date.UTC(+match[1], +(match[2] || 1) - 1, +match[3] || 1, hour, +(match[5] || 0), +match[6] || 0, +match[7] || 0));
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}
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} else if (value == null) {
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return new Date(NaN);
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}
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return new Date(Math.round(value));
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}
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/**
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* Quantity of a number. e.g. 0.1, 1, 10, 100
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*
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* @param {number} val
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* @return {number}
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*/
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function quantity(val) {
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return Math.pow(10, quantityExponent(val));
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}
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/**
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* Exponent of the quantity of a number
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* e.g., 1234 equals to 1.234*10^3, so quantityExponent(1234) is 3
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*
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* @param {number} val non-negative value
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* @return {number}
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*/
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function quantityExponent(val) {
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if (val === 0) {
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return 0;
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}
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var exp = Math.floor(Math.log(val) / Math.LN10);
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/**
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* exp is expected to be the rounded-down result of the base-10 log of val.
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* But due to the precision loss with Math.log(val), we need to restore it
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* using 10^exp to make sure we can get val back from exp. #11249
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*/
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if (val / Math.pow(10, exp) >= 10) {
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exp++;
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}
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return exp;
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}
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/**
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* find a “nice” number approximately equal to x. Round the number if round = true,
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* take ceiling if round = false. The primary observation is that the “nicest”
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* numbers in decimal are 1, 2, and 5, and all power-of-ten multiples of these numbers.
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*
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* See "Nice Numbers for Graph Labels" of Graphic Gems.
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*
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* @param {number} val Non-negative value.
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* @param {boolean} round
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* @return {number}
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*/
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function nice(val, round) {
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var exponent = quantityExponent(val);
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var exp10 = Math.pow(10, exponent);
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var f = val / exp10; // 1 <= f < 10
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var nf;
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if (round) {
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if (f < 1.5) {
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nf = 1;
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} else if (f < 2.5) {
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nf = 2;
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} else if (f < 4) {
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nf = 3;
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} else if (f < 7) {
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nf = 5;
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} else {
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nf = 10;
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}
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} else {
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if (f < 1) {
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nf = 1;
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} else if (f < 2) {
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nf = 2;
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} else if (f < 3) {
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nf = 3;
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} else if (f < 5) {
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nf = 5;
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} else {
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nf = 10;
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}
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}
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val = nf * exp10; // Fix 3 * 0.1 === 0.30000000000000004 issue (see IEEE 754).
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// 20 is the uppper bound of toFixed.
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return exponent >= -20 ? +val.toFixed(exponent < 0 ? -exponent : 0) : val;
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}
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/**
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* This code was copied from "d3.js"
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* <https://github.com/d3/d3/blob/9cc9a875e636a1dcf36cc1e07bdf77e1ad6e2c74/src/arrays/quantile.js>.
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* See the license statement at the head of this file.
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* @param {Array.<number>} ascArr
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*/
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function quantile(ascArr, p) {
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var H = (ascArr.length - 1) * p + 1;
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var h = Math.floor(H);
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var v = +ascArr[h - 1];
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var e = H - h;
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return e ? v + e * (ascArr[h] - v) : v;
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}
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/**
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* Order intervals asc, and split them when overlap.
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* expect(numberUtil.reformIntervals([
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* {interval: [18, 62], close: [1, 1]},
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* {interval: [-Infinity, -70], close: [0, 0]},
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* {interval: [-70, -26], close: [1, 1]},
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* {interval: [-26, 18], close: [1, 1]},
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* {interval: [62, 150], close: [1, 1]},
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* {interval: [106, 150], close: [1, 1]},
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* {interval: [150, Infinity], close: [0, 0]}
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* ])).toEqual([
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* {interval: [-Infinity, -70], close: [0, 0]},
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* {interval: [-70, -26], close: [1, 1]},
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* {interval: [-26, 18], close: [0, 1]},
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* {interval: [18, 62], close: [0, 1]},
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* {interval: [62, 150], close: [0, 1]},
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* {interval: [150, Infinity], close: [0, 0]}
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* ]);
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* @param {Array.<Object>} list, where `close` mean open or close
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* of the interval, and Infinity can be used.
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* @return {Array.<Object>} The origin list, which has been reformed.
|
|
*/
|
|
|
|
|
|
function reformIntervals(list) {
|
|
list.sort(function (a, b) {
|
|
return littleThan(a, b, 0) ? -1 : 1;
|
|
});
|
|
var curr = -Infinity;
|
|
var currClose = 1;
|
|
|
|
for (var i = 0; i < list.length;) {
|
|
var interval = list[i].interval;
|
|
var close = list[i].close;
|
|
|
|
for (var lg = 0; lg < 2; lg++) {
|
|
if (interval[lg] <= curr) {
|
|
interval[lg] = curr;
|
|
close[lg] = !lg ? 1 - currClose : 1;
|
|
}
|
|
|
|
curr = interval[lg];
|
|
currClose = close[lg];
|
|
}
|
|
|
|
if (interval[0] === interval[1] && close[0] * close[1] !== 1) {
|
|
list.splice(i, 1);
|
|
} else {
|
|
i++;
|
|
}
|
|
}
|
|
|
|
return list;
|
|
|
|
function littleThan(a, b, lg) {
|
|
return a.interval[lg] < b.interval[lg] || a.interval[lg] === b.interval[lg] && (a.close[lg] - b.close[lg] === (!lg ? 1 : -1) || !lg && littleThan(a, b, 1));
|
|
}
|
|
}
|
|
/**
|
|
* parseFloat NaNs numeric-cast false positives (null|true|false|"")
|
|
* ...but misinterprets leading-number strings, particularly hex literals ("0x...")
|
|
* subtraction forces infinities to NaN
|
|
*
|
|
* @param {*} v
|
|
* @return {boolean}
|
|
*/
|
|
|
|
|
|
function isNumeric(v) {
|
|
return v - parseFloat(v) >= 0;
|
|
}
|
|
|
|
exports.linearMap = linearMap;
|
|
exports.parsePercent = parsePercent;
|
|
exports.round = round;
|
|
exports.asc = asc;
|
|
exports.getPrecision = getPrecision;
|
|
exports.getPrecisionSafe = getPrecisionSafe;
|
|
exports.getPixelPrecision = getPixelPrecision;
|
|
exports.getPercentWithPrecision = getPercentWithPrecision;
|
|
exports.MAX_SAFE_INTEGER = MAX_SAFE_INTEGER;
|
|
exports.remRadian = remRadian;
|
|
exports.isRadianAroundZero = isRadianAroundZero;
|
|
exports.parseDate = parseDate;
|
|
exports.quantity = quantity;
|
|
exports.quantityExponent = quantityExponent;
|
|
exports.nice = nice;
|
|
exports.quantile = quantile;
|
|
exports.reformIntervals = reformIntervals;
|
|
exports.isNumeric = isNumeric; |