/*
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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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import {forceLayout} from './forceHelper';
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import {simpleLayout} from './simpleLayoutHelper';
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import {circularLayout} from './circularLayoutHelper';
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import {linearMap} from '../../util/number';
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import * as vec2 from 'zrender/src/core/vector';
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import * as zrUtil from 'zrender/src/core/util';
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export default function (ecModel) {
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ecModel.eachSeriesByType('graph', function (graphSeries) {
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var coordSys = graphSeries.coordinateSystem;
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if (coordSys && coordSys.type !== 'view') {
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return;
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}
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if (graphSeries.get('layout') === 'force') {
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var preservedPoints = graphSeries.preservedPoints || {};
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var graph = graphSeries.getGraph();
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var nodeData = graph.data;
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var edgeData = graph.edgeData;
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var forceModel = graphSeries.getModel('force');
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var initLayout = forceModel.get('initLayout');
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if (graphSeries.preservedPoints) {
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nodeData.each(function (idx) {
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var id = nodeData.getId(idx);
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nodeData.setItemLayout(idx, preservedPoints[id] || [NaN, NaN]);
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});
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}
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else if (!initLayout || initLayout === 'none') {
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simpleLayout(graphSeries);
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}
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else if (initLayout === 'circular') {
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circularLayout(graphSeries);
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}
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var nodeDataExtent = nodeData.getDataExtent('value');
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var edgeDataExtent = edgeData.getDataExtent('value');
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// var edgeDataExtent = edgeData.getDataExtent('value');
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var repulsion = forceModel.get('repulsion');
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var edgeLength = forceModel.get('edgeLength');
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if (!zrUtil.isArray(repulsion)) {
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repulsion = [repulsion, repulsion];
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}
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if (!zrUtil.isArray(edgeLength)) {
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edgeLength = [edgeLength, edgeLength];
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}
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// Larger value has smaller length
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edgeLength = [edgeLength[1], edgeLength[0]];
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var nodes = nodeData.mapArray('value', function (value, idx) {
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var point = nodeData.getItemLayout(idx);
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var rep = linearMap(value, nodeDataExtent, repulsion);
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if (isNaN(rep)) {
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rep = (repulsion[0] + repulsion[1]) / 2;
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}
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return {
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w: rep,
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rep: rep,
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fixed: nodeData.getItemModel(idx).get('fixed'),
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p: (!point || isNaN(point[0]) || isNaN(point[1])) ? null : point
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};
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});
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var edges = edgeData.mapArray('value', function (value, idx) {
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var edge = graph.getEdgeByIndex(idx);
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var d = linearMap(value, edgeDataExtent, edgeLength);
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if (isNaN(d)) {
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d = (edgeLength[0] + edgeLength[1]) / 2;
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}
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return {
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n1: nodes[edge.node1.dataIndex],
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n2: nodes[edge.node2.dataIndex],
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d: d,
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curveness: edge.getModel().get('lineStyle.curveness') || 0
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};
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});
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var coordSys = graphSeries.coordinateSystem;
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var rect = coordSys.getBoundingRect();
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var forceInstance = forceLayout(nodes, edges, {
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rect: rect,
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gravity: forceModel.get('gravity')
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});
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var oldStep = forceInstance.step;
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forceInstance.step = function (cb) {
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for (var i = 0, l = nodes.length; i < l; i++) {
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if (nodes[i].fixed) {
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// Write back to layout instance
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vec2.copy(nodes[i].p, graph.getNodeByIndex(i).getLayout());
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}
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}
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oldStep(function (nodes, edges, stopped) {
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for (var i = 0, l = nodes.length; i < l; i++) {
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if (!nodes[i].fixed) {
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graph.getNodeByIndex(i).setLayout(nodes[i].p);
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}
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preservedPoints[nodeData.getId(i)] = nodes[i].p;
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}
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for (var i = 0, l = edges.length; i < l; i++) {
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var e = edges[i];
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var edge = graph.getEdgeByIndex(i);
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var p1 = e.n1.p;
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var p2 = e.n2.p;
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var points = edge.getLayout();
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points = points ? points.slice() : [];
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points[0] = points[0] || [];
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points[1] = points[1] || [];
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vec2.copy(points[0], p1);
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vec2.copy(points[1], p2);
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if (+e.curveness) {
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points[2] = [
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(p1[0] + p2[0]) / 2 - (p1[1] - p2[1]) * e.curveness,
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(p1[1] + p2[1]) / 2 - (p2[0] - p1[0]) * e.curveness
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];
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}
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edge.setLayout(points);
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}
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// Update layout
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cb && cb(stopped);
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});
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};
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graphSeries.forceLayout = forceInstance;
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graphSeries.preservedPoints = preservedPoints;
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// Step to get the layout
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forceInstance.step();
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}
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else {
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// Remove prev injected forceLayout instance
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graphSeries.forceLayout = null;
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}
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});
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}
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