Function enableDataStack

_benchmarks/sample_echarts.js:34514–34598

* Note that it is too complicated to support 3d stack by value * (have to create two-dimension inverted index), so in 3d case * we just support that stacked by index. * * @param seriesModel * @param dimensionInfoList The same as the input of .

(seriesModel, dimensionInfoList, opt)

     */

    function enableDataStack(seriesModel, dimensionInfoList, opt) {
      opt = opt || {};
      var byIndex = opt.byIndex;
      var stackedCoordDimension = opt.stackedCoordDimension; // Compatibal: when `stack` is set as '', do not stack.

      var mayStack = !!(seriesModel && seriesModel.get('stack'));
      var stackedByDimInfo;
      var stackedDimInfo;
      var stackResultDimension;
      var stackedOverDimension;
      each(dimensionInfoList, function (dimensionInfo, index) {
        if (isString(dimensionInfo)) {
          dimensionInfoList[index] = dimensionInfo = {
            name: dimensionInfo
          };
        }

        if (mayStack && !dimensionInfo.isExtraCoord) {
          // Find the first ordinal dimension as the stackedByDimInfo.
          if (!byIndex && !stackedByDimInfo && dimensionInfo.ordinalMeta) {
            stackedByDimInfo = dimensionInfo;
          } // Find the first stackable dimension as the stackedDimInfo.


          if (!stackedDimInfo && dimensionInfo.type !== 'ordinal' && dimensionInfo.type !== 'time' && (!stackedCoordDimension || stackedCoordDimension === dimensionInfo.coordDim)) {
            stackedDimInfo = dimensionInfo;
          }
        }
      });

      if (stackedDimInfo && !byIndex && !stackedByDimInfo) {
        // Compatible with previous design, value axis (time axis) only stack by index.
        // It may make sense if the user provides elaborately constructed data.
        byIndex = true;
      } // Add stack dimension, they can be both calculated by coordinate system in `unionExtent`.
      // That put stack logic in List is for using conveniently in echarts extensions, but it
      // might not be a good way.


      if (stackedDimInfo) {
        // Use a weird name that not duplicated with other names.
        stackResultDimension = '__\0ecstackresult';
        stackedOverDimension = '__\0ecstackedover'; // Create inverted index to fast query index by value.

        if (stackedByDimInfo) {
          stackedByDimInfo.createInvertedIndices = true;
        }

        var stackedDimCoordDim_1 = stackedDimInfo.coordDim;
        var stackedDimType = stackedDimInfo.type;
        var stackedDimCoordIndex_1 = 0;
        each(dimensionInfoList, function (dimensionInfo) {
          if (dimensionInfo.coordDim === stackedDimCoordDim_1) {
            stackedDimCoordIndex_1++;
          }
        });
        dimensionInfoList.push({
          name: stackResultDimension,