import { Document } from '@antv/g';
import { isCombo, isEdge, isNode } from '../element';
export * from './events';
/**
 * <zh/> 基于 Event 对象触发事件
 *
 * <en/> Trigger event based on Event object
 * @param emitter - <zh/> 事件目标 | <en/> event target
 * @param event - <zh/> 事件对象 | <en/> event object
 */
export function emit(emitter, event) {
    emitter.emit(event.type, event);
}
/**
 * <zh/> 获取事件目标元素
 *
 * <en/> Get the event target element
 * @param shape - <zh/> 事件图形 | <en/> event shape
 * @returns <zh/> 目标元素 | <en/> target element
 * @remarks
 * <zh/> 事件响应大多数情况会命中元素的内部图形，通过该方法可以获取到其所属元素
 *
 * <en/> Most of the event responses will hit the internal graphics of the element, and this method can be used to get the element to which it belongs
 */
export function eventTargetOf(shape) {
    if (!shape)
        return null;
    if (shape instanceof Document) {
        return { type: 'canvas', element: shape };
    }
    let element = shape;
    while (element) {
        // 此判断条件不适用于 label 和 节点分开渲染的情况
        // This condition is not applicable to the case where the label and node are rendered separately
        if (isNode(element))
            return { type: 'node', element };
        if (isEdge(element))
            return { type: 'edge', element };
        if (isCombo(element))
            return { type: 'combo', element };
        element = element.parentElement;
    }
    return null;
}
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