@alicloud/cloud-charts/es/common/label.js


'use strict';

import _extends from "@babel/runtime/helpers/extends";
import _objectWithoutPropertiesLoose from "@babel/runtime/helpers/objectWithoutPropertiesLoose";
import themes from '../themes';
import { merge, pxToNumber } from './common';
import { warn } from './log';

/**
 * 图形元素label设置。
 *
 * @param {object} geom 图形元素对象
 * @param {object} config 图表配置项
 * @param {string} [field] 映射数据的字段，默认为y
 * @param {object} [defaultConfig] 图表额外配置项
 * @param {string} [extraConfigKey] 额外配置项的key，会在 config.label 的基础上额外扩展，且配置优先级高于默认的 label
 * @param {boolean} [useCustomOffset] 是否适用用户自定义偏移量
 * */
var defaultConfigKey = 'label';
export default function (_ref) {
  var geom = _ref.geom,
      config = _ref.config,
      _ref$field = _ref.field,
      field = _ref$field === void 0 ? 'y' : _ref$field,
      _ref$defaultConfig = _ref.defaultConfig,
      defaultConfig = _ref$defaultConfig === void 0 ? {} : _ref$defaultConfig,
      _ref$extraConfigKey = _ref.extraConfigKey,
      extraConfigKey = _ref$extraConfigKey === void 0 ? null : _ref$extraConfigKey,
      _ref$useCustomOffset = _ref.useCustomOffset,
      useCustomOffset = _ref$useCustomOffset === void 0 ? undefined : _ref$useCustomOffset,
      _ref$componentConfig = _ref.componentConfig,
      componentConfig = _ref$componentConfig === void 0 ? undefined : _ref$componentConfig,
      extraCallbackParams = _ref.extraCallbackParams;
  var configLabel = config[defaultConfigKey];

  if (extraConfigKey && config[extraConfigKey] !== undefined) {
    configLabel = config[extraConfigKey];
  } // const configKey = extraConfigKey || defaultConfigKey;


  if (!configLabel || typeof configLabel === 'object' && configLabel.visible === false) {
    return;
  }

  if (configLabel === true) {
    configLabel = {};
  }

  var _configLabel = configLabel,
      _configLabel$position = _configLabel.position,
      position = _configLabel$position === void 0 ? 'top' : _configLabel$position,
      offset = _configLabel.offset,
      _configLabel$labelFor = _configLabel.labelFormatter,
      labelFormatter = _configLabel$labelFor === void 0 ? null : _configLabel$labelFor,
      customConfig = _configLabel.customConfig,
      userField = _configLabel.field,
      key = _configLabel.key,
      callback = _configLabel.callback,
      otherConfigs = _objectWithoutPropertiesLoose(_configLabel, ["position", "offset", "labelFormatter", "customConfig", "field", "key", "callback"]);

  var labelConfig = _extends({}, defaultConfig, {
    // type,
    position: position,
    // 默认距离 4，加上文字一半的大小以居中，转换为字号 12/3 + 12/2 = 12 * 5/6
    offset: pxToNumber(themes['widgets-font-size-1']) * 5 / 6 // autoRotate,
    // style,
    // textStyle,

  });

  if (key) {
    warn('config.label', 'key 属性已废弃，请使用 field 属性');
  }

  var newField = key || userField || field;

  if (labelFormatter) {
    labelConfig.content = function (v, item, index) {
      return labelFormatter(v[newField], item, index);
    };
  }

  Object.assign(labelConfig, otherConfigs);

  if (position === 'middle') {
    labelConfig.offset = 0;
  }

  if (componentConfig) {
    Object.assign(labelConfig, componentConfig);
  }

  if (offset !== undefined) {
    labelConfig.offset = offset;
  }

  if (customConfig) {
    merge(labelConfig, customConfig);
  }

  if (useCustomOffset) {
    labelConfig.offset = Number(offset);
  }

  if (callback) {
    if (extraCallbackParams) {
      geom.label(newField, function () {
        for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
          args[_key] = arguments[_key];
        }

        return callback.apply(void 0, args.concat(extraCallbackParams));
      }, labelConfig);
    } else {
      geom.label(newField, callback, labelConfig);
    }
  } else {
    geom.label(newField, labelConfig);
  }
}