echarts/lib/data/helper/dimensionHelper.js

A powerful charting and visualization library for browser

var _util = require("zrender/lib/core/util");

var each = _util.each;
var createHashMap = _util.createHashMap;
var assert = _util.assert;

var _config = require("../../config");

var __DEV__ = _config.__DEV__;
var OTHER_DIMENSIONS = createHashMap(['tooltip', 'label', 'itemName', 'itemId', 'seriesName']);

function summarizeDimensions(data) {
  var summary = {};
  var encode = summary.encode = {};
  var coordDimMap = summary.coordDimMap = createHashMap();
  var defaultedLabel = [];
  each(data.dimensions, function (dimName) {
    var dimItem = data.getDimensionInfo(dimName);
    var coordDim = dimItem.coordDim;

    if (coordDim) {
      var coordDimArr = encode[coordDim];

      if (!encode.hasOwnProperty(coordDim)) {
        coordDimArr = encode[coordDim] = [];
      }

      coordDimArr[dimItem.coordDimIndex] = dimName;

      if (dimItem.isSysCoord && mayLabelDimType(dimItem.type)) {
        // Use the last coord dim (and label friendly) as default label,
        // because both show x, y on label is not look good, and usually
        // y axis is more focusd conventionally.
        defaultedLabel[0] = dimName;
      }

      coordDimMap.set(coordDim, 1);
    }

    OTHER_DIMENSIONS.each(function (v, otherDim) {
      var otherDimArr = encode[otherDim];

      if (!encode.hasOwnProperty(otherDim)) {
        otherDimArr = encode[otherDim] = [];
      }

      var dimIndex = dimItem.otherDims[otherDim];

      if (dimIndex != null && dimIndex !== false) {
        otherDimArr[dimIndex] = dimItem.name;
      }
    });
  });
  var dataDimsOnCoord = [];
  coordDimMap.each(function (v, coordDim) {
    dataDimsOnCoord = dataDimsOnCoord.concat(encode[coordDim]);
  });
  summary.dataDimsOnCoord = dataDimsOnCoord;
  var encodeLabel = encode.label; // FIXME `encode.label` is not recommanded, because formatter can not be set
  // in this way. Use label.formatter instead. May be remove this approach someday.

  if (encodeLabel && encodeLabel.length) {
    defaultedLabel = encodeLabel.slice();
  }

  var defaultedTooltip = defaultedLabel.slice();
  var encodeTooltip = encode.tooltip;

  if (encodeTooltip && encodeTooltip.length) {
    defaultedTooltip = encodeTooltip.slice();
  }

  encode.defaultedLabel = defaultedLabel;
  encode.defaultedTooltip = defaultedTooltip;
  return summary;
}

function getDimensionTypeByAxis(axisType) {
  return axisType === 'category' ? 'ordinal' : axisType === 'time' ? 'time' : 'float';
}

function mayLabelDimType(dimType) {
  // In most cases, ordinal and time do not suitable for label.
  // Ordinal info can be displayed on axis. Time is too long.
  return !(dimType === 'ordinal' || dimType === 'time');
} // function findTheLastDimMayLabel(data) {
//     // Get last value dim
//     var dimensions = data.dimensions.slice();
//     var valueType;
//     var valueDim;
//     while (dimensions.length && (
//         valueDim = dimensions.pop(),
//         valueType = data.getDimensionInfo(valueDim).type,
//         valueType === 'ordinal' || valueType === 'time'
//     )) {} // jshint ignore:line
//     return valueDim;
// }


exports.OTHER_DIMENSIONS = OTHER_DIMENSIONS;
exports.summarizeDimensions = summarizeDimensions;
exports.getDimensionTypeByAxis = getDimensionTypeByAxis;