wf123537200 commented on a change in pull request #12590: URL: https://github.com/apache/incubator-echarts/pull/12590#discussion_r438516859
########## File path: src/chart/helper/multipleGraphEdgeHelper.js ########## @@ -0,0 +1,221 @@ +/* +* Licensed to the Apache Software Foundation (ASF) under one +* or more contributor license agreements. See the NOTICE file +* distributed with this work for additional information +* regarding copyright ownership. The ASF licenses this file +* to you under the Apache License, Version 2.0 (the +* "License"); you may not use this file except in compliance +* with the License. You may obtain a copy of the License at +* +* http://www.apache.org/licenses/LICENSE-2.0 +* +* Unless required by applicable law or agreed to in writing, +* software distributed under the License is distributed on an +* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +* KIND, either express or implied. See the License for the +* specific language governing permissions and limitations +* under the License. +*/ + +var linkMap = {}; +var curvenessList = []; + +/** + * params handler + * @param seriesModel + * @returns {*} + */ +var getAutoCurvenessParams = function (seriesModel) { + var autoCurveness = seriesModel.getModel('autoCurveness'); + + if (!autoCurveness || !autoCurveness.option) { + return null; + } + + return autoCurveness.option; +}; + +/** + * Generate a list of edge curvatures, 20 is the default + * @param seriesModel + * @param addLength append length + * @return 20 => [0, -0.2, 0.2, -0.4, 0.4, -0.6, 0.6, -0.8, 0.8, -1, 1, -1.2, 1.2, -1.4, 1.4, -1.6, 1.6, -1.8, 1.8, -2] + */ +var createCurveness = function (seriesModel, addLength) { + var autoCurvenssParmas = getAutoCurvenessParams(seriesModel); + var length = 20; + + // handler the function set + if (typeof autoCurvenssParmas === 'number') { + length = autoCurvenssParmas; + } + else if (typeof autoCurvenssParmas === 'function') { + curvenessList = autoCurvenssParmas(); + return; + } + + // addLength + if (addLength) { + length = addLength; + } + + // if already calculated return + if (length < curvenessList.length) { + return; + } + + // 保证长度为偶数 + var len = length % 2 ? length + 2 : length + 3; + curvenessList = []; + + for (var i = 0; i < len; i++) { + curvenessList.push((i % 2 ? i + 1 : i) / 10 * (i % 2 ? -1 : 1)); + } +}; + +/** + * Create different cache key data in the positive and negative directions, in order to set the curvature later + * @param link + * @param seriesModel + * @returns {string} + */ +var getKeyOfLinks = function (link, seriesModel) { + return [seriesModel.uid, link.source, link.target].join('>'); +}; + +/** + * get opposite key + * 获取反向的key + * @param key + * @returns {string} + */ +var getOppositeKey = function (key) { + var keys = key.split('>'); + + return [keys[0], keys[2], keys[1]].join('>'); +}; + +/** + * set linkMap with key + * @param link + * @param seriesModel + * @param index + */ +var setLinkToMap = function (link, seriesModel, index) { + var key = getKeyOfLinks(link, seriesModel); + var hasOppositeLinks = linkMap[getOppositeKey(key)]; + // set direction + if (hasOppositeLinks && linkMap[key] && !linkMap[key].isForward) { + linkMap[getOppositeKey(key)].isForward = true; + } + + linkMap[key] = linkMap[key] || []; + linkMap[key].push(index); +}; + +/** + * get linkMap with key + * @param link + * @param seriesModel + * @param index + */ +var getLinkFromMap = function (link, seriesModel) { + var key = getKeyOfLinks(link, seriesModel); + return linkMap[key]; +}; + +/** + * calculate all cases total length + * @param link + * @param seriesModel + * @returns {number} + */ +var getTotalLengthBetweenNodes = function (link, seriesModel) { + var len = getLinkMapLengthWithKey([seriesModel.uid, link.source, link.target].join('>')); + var lenV = getLinkMapLengthWithKey([seriesModel.uid, link.target, link.source].join('>')); + + return len + lenV; +}; + +/** + * + * @param key + */ +var getLinkMapLengthWithKey = function (key) { + return linkMap[key] ? linkMap[key].length : 0; +}; + +/** + * Count the number of edges between the same two points, used to obtain the curvature table and the parity of the edge + * @param edges + * @param seriesModel + * @param graph + */ +export function calculateMutilEdges(edges, seriesModel, graph) { + if (!getAutoCurvenessParams(seriesModel)) { + return; + } + // Hang on this object 4 dispose + curvenessList = graph.curvenessList || []; + linkMap = graph.linkMap = graph.linkMap || {}; + + + for (var i = 0; i < edges.length; i++) { + var link = edges[i]; + var source = link.source; + var target = link.target; + if (!source || !target) { + continue; + } + setLinkToMap(link, seriesModel, i); + } + + // calc the array of curvenessList + createCurveness(seriesModel); +} + +/** + * Set curvature for link + * @param link + * @param seriesModel + * @param index + */ +export function setCurvenessForLink(link, seriesModel, index) { + if (!getAutoCurvenessParams(seriesModel)) { + return; + } + + var linkArray = getLinkFromMap(link, seriesModel); + if (!linkArray) { + return; + } + + var linkIndex = linkArray.findIndex(function (it) { + return it === index; + }); + var totalLen = getTotalLengthBetweenNodes(link, seriesModel); + // if totalLen bigger than curvenessList, recreate curvenessList + if (totalLen > curvenessList.length) { + createCurveness(seriesModel, totalLen); Review comment: yes, if the ```autoCurveness ``` not allow to set as function, we should always create it ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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