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{ each } from '@antv/util';\nimport { ListItem } from '../../../dependents';\nimport Element from '../../../geometry/element/';\nimport { getElements, getElementsByState } from '../util';\nimport { clearHighlight } from './highlight-util';\nimport StateAction from './state';\n\nimport { ELEMENT_STATE } from '../../../constant';\n\nexport const STATUS_UNACTIVE = ELEMENT_STATE.INACTIVE;\nexport const STATUS_ACTIVE = ELEMENT_STATE.ACTIVE;\nexport type Callback = (el) => boolean;\n\n/**\n * @ignore\n * highlight，指定图形高亮，其他图形变暗\n */\nclass ElementHighlight extends StateAction {\n  protected stateName: string = STATUS_ACTIVE;\n\n  // 多个元素设置、取消 highlight\n  protected setElementsStateByItem(elements: Element[], field: string, item: ListItem, enable: boolean) {\n    const callback = (el) => this.isMathItem(el, field, item);\n    this.setHighlightBy(elements, callback, enable);\n  }\n\n  // 设置元素的 highlight\n  protected setElementHighlight(el: Element, callback: Callback) {\n    if (callback(el)) {\n      if (el.hasState(STATUS_UNACTIVE)) {\n        el.setState(STATUS_UNACTIVE, false);\n      }\n      el.setState(STATUS_ACTIVE, true);\n    } else if (!el.hasState(STATUS_ACTIVE)) {\n      el.setState(STATUS_UNACTIVE, true);\n    }\n  }\n\n  protected setHighlightBy(elements: Element[], callback: Callback, enable: boolean) {\n    if (enable) {\n      // 如果是设置 highlight ，则将匹配的 element 设置成 active，\n      // 其他如果不是 active，则设置成 unactive\n      each(elements, (el) => {\n        this.setElementHighlight(el, callback);\n      });\n    } else {\n      // 如果取消 highlight，则要检测是否全部取消 highlight\n      const activeElements = getElementsByState(this.context.view, STATUS_ACTIVE);\n      let allCancel = true;\n      // 检测所有 activeElements 都要取消 highlight\n      each(activeElements, (el) => {\n        if (!callback(el)) {\n          allCancel = false;\n          return false;\n        }\n      });\n      if (allCancel) {\n        // 都要取消，则取消所有的 active，unactive 状态\n        this.clear();\n      } else {\n        // 如果不是都要取消 highlight, 则设置匹配的 element 的状态为 unactive\n        // 其他 element 状态不变\n        each(elements, (el) => {\n          if (callback(el)) {\n            if (el.hasState(STATUS_ACTIVE)) {\n              el.setState(STATUS_ACTIVE, false);\n            }\n            el.setState(STATUS_UNACTIVE, true);\n          }\n        });\n      }\n    }\n  }\n\n  // 单个元素设置和取消 highlight\n  protected setElementState(element: Element, enable: boolean) {\n    const view = this.context.view;\n    const elements = getElements(view);\n    this.setHighlightBy(elements, (el) => element === el, enable);\n  }\n\n  public highlight() {\n    this.setState();\n  }\n\n  // 清理掉所有的 active， unactive 状态\n  public clear() {\n    const view = this.context.view;\n    clearHighlight(view);\n  }\n}\n\nexport default ElementHighlight;\n"]}