dd_xcx/node_modules/@antv/scale/lib/category.js

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }

var Base = require('./base');

var catAuto = require('./auto/cat');

var each = require('@antv/util/lib/each');

var isNumber = require('@antv/util/lib/type/is-number');

var isString = require('@antv/util/lib/type/is-string');

var Category =
/*#__PURE__*/
function (_Base) {
  _inheritsLoose(Category, _Base);

  function Category() {
    return _Base.apply(this, arguments) || this;
  }

  var _proto = Category.prototype;

  _proto._initDefaultCfg = function _initDefaultCfg() {
    _Base.prototype._initDefaultCfg.call(this);

    this.type = 'cat';
    /**
     * 是否分类度量
     * @type {Boolean}
     */

    this.isCategory = true;
    this.isRounding = true; // 是否进行取整操作
  }
  /**
   * @override
   */
  ;

  _proto.init = function init() {
    var self = this;
    var values = self.values;
    var tickCount = self.tickCount;
    each(values, function (v, i) {
      values[i] = v.toString();
    });

    if (!self.ticks) {
      var ticks = values;

      if (tickCount) {
        var temp = catAuto({
          maxCount: tickCount,
          data: values,
          isRounding: self.isRounding
        });
        ticks = temp.ticks;
      }

      this.ticks = ticks;
    }
  }
  /**
   * @override
   */
  ;

  _proto.getText = function getText(value) {
    if (this.values.indexOf(value) === -1 && isNumber(value)) {
      value = this.values[Math.round(value)];
    }

    return _Base.prototype.getText.call(this, value);
  }
  /**
   * @override
   */
  ;

  _proto.translate = function translate(value) {
    var index = this.values.indexOf(value);

    if (index === -1 && isNumber(value)) {
      index = value;
    } else if (index === -1) {
      index = NaN;
    }

    return index;
  }
  /**
   * @override
   */
  ;

  _proto.scale = function scale(value) {
    var rangeMin = this.rangeMin();
    var rangeMax = this.rangeMax();
    var percent;

    if (isString(value) || this.values.indexOf(value) !== -1) {
      value = this.translate(value);
    }

    if (this.values.length > 1) {
      percent = value / (this.values.length - 1);
    } else {
      percent = value;
    }

    return rangeMin + percent * (rangeMax - rangeMin);
  }
  /**
   * @override
   */
  ;

  _proto.invert = function invert(value) {
    if (isString(value)) {
      // 如果已经是字符串
      return value;
    }

    var min = this.rangeMin();
    var max = this.rangeMax(); // 归一到 范围内

    if (value < min) {
      value = min;
    }

    if (value > max) {
      value = max;
    }

    var percent = (value - min) / (max - min);
    var index = Math.round(percent * (this.values.length - 1)) % this.values.length;
    index = index || 0;
    return this.values[index];
  };

  return Category;
}(Base);

Base.Cat = Category;
module.exports = Category;