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79 lines
3.6 KiB
79 lines
3.6 KiB
function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _nonIterableRest(); }
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function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance"); }
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function _iterableToArrayLimit(arr, i) { if (!(Symbol.iterator in Object(arr) || Object.prototype.toString.call(arr) === "[object Arguments]")) { return; } var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }
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function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
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function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
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import { useMemo } from 'react';
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import { invariant } from '@react-dnd/invariant';
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import { registerSource } from '../../common/registration';
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import { useDragDropManager } from './useDragDropManager';
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import { DragSourceMonitorImpl } from '../../common/DragSourceMonitorImpl';
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import { SourceConnector } from '../../common/SourceConnector';
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import { useIsomorphicLayoutEffect } from './useIsomorphicLayoutEffect';
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export function useDragSourceMonitor() {
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var manager = useDragDropManager();
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var monitor = useMemo(function () {
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return new DragSourceMonitorImpl(manager);
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}, [manager]);
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var connector = useMemo(function () {
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return new SourceConnector(manager.getBackend());
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}, [manager]);
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return [monitor, connector];
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}
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export function useDragHandler(spec, monitor, connector) {
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var manager = useDragDropManager();
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var handler = useMemo(function () {
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return {
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beginDrag: function beginDrag() {
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var _spec$current = spec.current,
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begin = _spec$current.begin,
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item = _spec$current.item;
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if (begin) {
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var beginResult = begin(monitor);
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invariant(beginResult == null || _typeof(beginResult) === 'object', 'dragSpec.begin() must either return an object, undefined, or null');
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return beginResult || item || {};
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}
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return item || {};
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},
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canDrag: function canDrag() {
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if (typeof spec.current.canDrag === 'boolean') {
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return spec.current.canDrag;
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} else if (typeof spec.current.canDrag === 'function') {
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return spec.current.canDrag(monitor);
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} else {
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return true;
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}
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},
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isDragging: function isDragging(globalMonitor, target) {
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var isDragging = spec.current.isDragging;
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return isDragging ? isDragging(monitor) : target === globalMonitor.getSourceId();
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},
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endDrag: function endDrag() {
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var end = spec.current.end;
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if (end) {
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end(monitor.getItem(), monitor);
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}
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connector.reconnect();
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}
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};
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}, []);
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useIsomorphicLayoutEffect(function registerHandler() {
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var _registerSource = registerSource(spec.current.item.type, handler, manager),
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_registerSource2 = _slicedToArray(_registerSource, 2),
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handlerId = _registerSource2[0],
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unregister = _registerSource2[1];
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monitor.receiveHandlerId(handlerId);
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connector.receiveHandlerId(handlerId);
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return unregister;
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}, []);
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} |