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node_modules/echarts/src/layout/points.js 3.29 KB
aaac7fed   liuqimichale   add
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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.
  */
  
  /* global Float32Array */
  
  import {map} from 'zrender/src/core/util';
  import createRenderPlanner from '../chart/helper/createRenderPlanner';
  import {isDimensionStacked} from '../data/helper/dataStackHelper';
  
  export default function (seriesType) {
      return {
          seriesType: seriesType,
  
          plan: createRenderPlanner(),
  
          reset: function (seriesModel) {
              var data = seriesModel.getData();
              var coordSys = seriesModel.coordinateSystem;
              var pipelineContext = seriesModel.pipelineContext;
              var isLargeRender = pipelineContext.large;
  
              if (!coordSys) {
                  return;
              }
  
              var dims = map(coordSys.dimensions, function (dim) {
                  return data.mapDimension(dim);
              }).slice(0, 2);
              var dimLen = dims.length;
  
              var stackResultDim = data.getCalculationInfo('stackResultDimension');
              if (isDimensionStacked(data, dims[0] /*, dims[1]*/)) {
                  dims[0] = stackResultDim;
              }
              if (isDimensionStacked(data, dims[1] /*, dims[0]*/)) {
                  dims[1] = stackResultDim;
              }
  
              function progress(params, data) {
                  var segCount = params.end - params.start;
                  var points = isLargeRender && new Float32Array(segCount * dimLen);
  
                  for (var i = params.start, offset = 0, tmpIn = [], tmpOut = []; i < params.end; i++) {
                      var point;
  
                      if (dimLen === 1) {
                          var x = data.get(dims[0], i);
                          point = !isNaN(x) && coordSys.dataToPoint(x, null, tmpOut);
                      }
                      else {
                          var x = tmpIn[0] = data.get(dims[0], i);
                          var y = tmpIn[1] = data.get(dims[1], i);
                          // Also {Array.<number>}, not undefined to avoid if...else... statement
                          point = !isNaN(x) && !isNaN(y) && coordSys.dataToPoint(tmpIn, null, tmpOut);
                      }
  
                      if (isLargeRender) {
                          points[offset++] = point ? point[0] : NaN;
                          points[offset++] = point ? point[1] : NaN;
                      }
                      else {
                          data.setItemLayout(i, (point && point.slice()) || [NaN, NaN]);
                      }
                  }
  
                  isLargeRender && data.setLayout('symbolPoints', points);
              }
  
              return dimLen && {progress: progress};
          }
      };
  }