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node_modules/echarts/lib/chart/graph/forceLayout.js

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+
+/*
+* 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.
+*/
+
+
+/**
+ * AUTO-GENERATED FILE. DO NOT MODIFY.
+ */
+
+/*
+* 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.
+*/
+import { forceLayout } from './forceHelper.js';
+import { simpleLayout } from './simpleLayoutHelper.js';
+import { circularLayout } from './circularLayoutHelper.js';
+import { linearMap } from '../../util/number.js';
+import * as vec2 from 'zrender/lib/core/vector.js';
+import * as zrUtil from 'zrender/lib/core/util.js';
+import { getCurvenessForEdge } from '../helper/multipleGraphEdgeHelper.js';
+export default function graphForceLayout(ecModel) {
+  ecModel.eachSeriesByType('graph', function (graphSeries) {
+    var coordSys = graphSeries.coordinateSystem;
+    if (coordSys && coordSys.type !== 'view') {
+      return;
+    }
+    if (graphSeries.get('layout') === 'force') {
+      var preservedPoints_1 = graphSeries.preservedPoints || {};
+      var graph_1 = graphSeries.getGraph();
+      var nodeData_1 = graph_1.data;
+      var edgeData = graph_1.edgeData;
+      var forceModel = graphSeries.getModel('force');
+      var initLayout = forceModel.get('initLayout');
+      if (graphSeries.preservedPoints) {
+        nodeData_1.each(function (idx) {
+          var id = nodeData_1.getId(idx);
+          nodeData_1.setItemLayout(idx, preservedPoints_1[id] || [NaN, NaN]);
+        });
+      } else if (!initLayout || initLayout === 'none') {
+        simpleLayout(graphSeries);
+      } else if (initLayout === 'circular') {
+        circularLayout(graphSeries, 'value');
+      }
+      var nodeDataExtent_1 = nodeData_1.getDataExtent('value');
+      var edgeDataExtent_1 = edgeData.getDataExtent('value');
+      // let edgeDataExtent = edgeData.getDataExtent('value');
+      var repulsion = forceModel.get('repulsion');
+      var edgeLength = forceModel.get('edgeLength');
+      var repulsionArr_1 = zrUtil.isArray(repulsion) ? repulsion : [repulsion, repulsion];
+      var edgeLengthArr_1 = zrUtil.isArray(edgeLength) ? edgeLength : [edgeLength, edgeLength];
+      // Larger value has smaller length
+      edgeLengthArr_1 = [edgeLengthArr_1[1], edgeLengthArr_1[0]];
+      var nodes_1 = nodeData_1.mapArray('value', function (value, idx) {
+        var point = nodeData_1.getItemLayout(idx);
+        var rep = linearMap(value, nodeDataExtent_1, repulsionArr_1);
+        if (isNaN(rep)) {
+          rep = (repulsionArr_1[0] + repulsionArr_1[1]) / 2;
+        }
+        return {
+          w: rep,
+          rep: rep,
+          fixed: nodeData_1.getItemModel(idx).get('fixed'),
+          p: !point || isNaN(point[0]) || isNaN(point[1]) ? null : point
+        };
+      });
+      var edges = edgeData.mapArray('value', function (value, idx) {
+        var edge = graph_1.getEdgeByIndex(idx);
+        var d = linearMap(value, edgeDataExtent_1, edgeLengthArr_1);
+        if (isNaN(d)) {
+          d = (edgeLengthArr_1[0] + edgeLengthArr_1[1]) / 2;
+        }
+        var edgeModel = edge.getModel();
+        var curveness = zrUtil.retrieve3(edge.getModel().get(['lineStyle', 'curveness']), -getCurvenessForEdge(edge, graphSeries, idx, true), 0);
+        return {
+          n1: nodes_1[edge.node1.dataIndex],
+          n2: nodes_1[edge.node2.dataIndex],
+          d: d,
+          curveness: curveness,
+          ignoreForceLayout: edgeModel.get('ignoreForceLayout')
+        };
+      });
+      // let coordSys = graphSeries.coordinateSystem;
+      var rect = coordSys.getBoundingRect();
+      var forceInstance = forceLayout(nodes_1, edges, {
+        rect: rect,
+        gravity: forceModel.get('gravity'),
+        friction: forceModel.get('friction')
+      });
+      forceInstance.beforeStep(function (nodes, edges) {
+        for (var i = 0, l = nodes.length; i < l; i++) {
+          if (nodes[i].fixed) {
+            // Write back to layout instance
+            vec2.copy(nodes[i].p, graph_1.getNodeByIndex(i).getLayout());
+          }
+        }
+      });
+      forceInstance.afterStep(function (nodes, edges, stopped) {
+        for (var i = 0, l = nodes.length; i < l; i++) {
+          if (!nodes[i].fixed) {
+            graph_1.getNodeByIndex(i).setLayout(nodes[i].p);
+          }
+          preservedPoints_1[nodeData_1.getId(i)] = nodes[i].p;
+        }
+        for (var i = 0, l = edges.length; i < l; i++) {
+          var e = edges[i];
+          var edge = graph_1.getEdgeByIndex(i);
+          var p1 = e.n1.p;
+          var p2 = e.n2.p;
+          var points = edge.getLayout();
+          points = points ? points.slice() : [];
+          points[0] = points[0] || [];
+          points[1] = points[1] || [];
+          vec2.copy(points[0], p1);
+          vec2.copy(points[1], p2);
+          if (+e.curveness) {
+            points[2] = [(p1[0] + p2[0]) / 2 - (p1[1] - p2[1]) * e.curveness, (p1[1] + p2[1]) / 2 - (p2[0] - p1[0]) * e.curveness];
+          }
+          edge.setLayout(points);
+        }
+      });
+      graphSeries.forceLayout = forceInstance;
+      graphSeries.preservedPoints = preservedPoints_1;
+      // Step to get the layout
+      forceInstance.step();
+    } else {
+      // Remove prev injected forceLayout instance
+      graphSeries.forceLayout = null;
+    }
+  });
+}