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node_modules/echarts/lib/chart/line/helper.js 3.43 KB
2a09d1a4   liuqimichale   添加宜春 天水 宣化
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  var _dataStackHelper = require("../../data/helper/dataStackHelper");
  
  var isDimensionStacked = _dataStackHelper.isDimensionStacked;
  
  var _util = require("zrender/lib/core/util");
  
  var map = _util.map;
  
  /*
  * 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.
  */
  
  /**
   * @param {Object} coordSys
   * @param {module:echarts/data/List} data
   * @param {string} valueOrigin lineSeries.option.areaStyle.origin
   */
  function prepareDataCoordInfo(coordSys, data, valueOrigin) {
    var baseAxis = coordSys.getBaseAxis();
    var valueAxis = coordSys.getOtherAxis(baseAxis);
    var valueStart = getValueStart(valueAxis, valueOrigin);
    var baseAxisDim = baseAxis.dim;
    var valueAxisDim = valueAxis.dim;
    var valueDim = data.mapDimension(valueAxisDim);
    var baseDim = data.mapDimension(baseAxisDim);
    var baseDataOffset = valueAxisDim === 'x' || valueAxisDim === 'radius' ? 1 : 0;
    var dims = map(coordSys.dimensions, function (coordDim) {
      return data.mapDimension(coordDim);
    });
    var stacked;
    var stackResultDim = data.getCalculationInfo('stackResultDimension');
  
    if (stacked |= isDimensionStacked(data, dims[0]
    /*, dims[1]*/
    )) {
      // jshint ignore:line
      dims[0] = stackResultDim;
    }
  
    if (stacked |= isDimensionStacked(data, dims[1]
    /*, dims[0]*/
    )) {
      // jshint ignore:line
      dims[1] = stackResultDim;
    }
  
    return {
      dataDimsForPoint: dims,
      valueStart: valueStart,
      valueAxisDim: valueAxisDim,
      baseAxisDim: baseAxisDim,
      stacked: !!stacked,
      valueDim: valueDim,
      baseDim: baseDim,
      baseDataOffset: baseDataOffset,
      stackedOverDimension: data.getCalculationInfo('stackedOverDimension')
    };
  }
  
  function getValueStart(valueAxis, valueOrigin) {
    var valueStart = 0;
    var extent = valueAxis.scale.getExtent();
  
    if (valueOrigin === 'start') {
      valueStart = extent[0];
    } else if (valueOrigin === 'end') {
      valueStart = extent[1];
    } // auto
    else {
        // Both positive
        if (extent[0] > 0) {
          valueStart = extent[0];
        } // Both negative
        else if (extent[1] < 0) {
            valueStart = extent[1];
          } // If is one positive, and one negative, onZero shall be true
  
      }
  
    return valueStart;
  }
  
  function getStackedOnPoint(dataCoordInfo, coordSys, data, idx) {
    var value = NaN;
  
    if (dataCoordInfo.stacked) {
      value = data.get(data.getCalculationInfo('stackedOverDimension'), idx);
    }
  
    if (isNaN(value)) {
      value = dataCoordInfo.valueStart;
    }
  
    var baseDataOffset = dataCoordInfo.baseDataOffset;
    var stackedData = [];
    stackedData[baseDataOffset] = data.get(dataCoordInfo.baseDim, idx);
    stackedData[1 - baseDataOffset] = value;
    return coordSys.dataToPoint(stackedData);
  }
  
  exports.prepareDataCoordInfo = prepareDataCoordInfo;
  exports.getStackedOnPoint = getStackedOnPoint;