en/builder/src/echarts3/component/timeline/TimelineAxis.js

import * as zrUtil from 'zrender/src/core/util';
import Axis from '../../coord/Axis';
import * as axisHelper from '../../coord/axisHelper';
/**
 * Extend axis 2d
 * @constructor module:echarts/coord/cartesian/Axis2D
 * @extends {module:echarts/coord/cartesian/Axis}
 * @param {string} dim
 * @param {*} scale
 * @param {Array.<number>} coordExtent
 * @param {string} axisType
 * @param {string} position
 */

var TimelineAxis = function (dim, scale, coordExtent, axisType) {
  Axis.call(this, dim, scale, coordExtent);
  /**
   * Axis type
   *  - 'category'
   *  - 'value'
   *  - 'time'
   *  - 'log'
   * @type {string}
   */

  this.type = axisType || 'value';
  /**
   * @private
   * @type {number}
   */

  this._autoLabelInterval;
  /**
   * Axis model
   * @param {module:echarts/component/TimelineModel}
   */

  this.model = null;
};

TimelineAxis.prototype = {
  constructor: TimelineAxis,

  /**
   * @public
   * @return {number}
   */
  getLabelInterval: function () {
    var timelineModel = this.model;
    var labelModel = timelineModel.getModel('label.normal');
    var labelInterval = labelModel.get('interval');

    if (labelInterval != null && labelInterval != 'auto') {
      return labelInterval;
    }

    var labelInterval = this._autoLabelInterval;

    if (!labelInterval) {
      labelInterval = this._autoLabelInterval = axisHelper.getAxisLabelInterval(zrUtil.map(this.scale.getTicks(), this.dataToCoord, this), axisHelper.getFormattedLabels(this, labelModel.get('formatter')), labelModel.getFont(), timelineModel.get('orient') === 'horizontal' ? 0 : 90, labelModel.get('rotate'));
    }

    return labelInterval;
  },

  /**
   * If label is ignored.
   * Automatically used when axis is category and label can not be all shown
   * @public
   * @param  {number} idx
   * @return {boolean}
   */
  isLabelIgnored: function (idx) {
    if (this.type === 'category') {
      var labelInterval = this.getLabelInterval();
      return typeof labelInterval === 'function' && !labelInterval(idx, this.scale.getLabel(idx)) || idx % (labelInterval + 1);
    }
  }
};
zrUtil.inherits(TimelineAxis, Axis);
export default TimelineAxis;