bc518174
 王天杨
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import { invariant } from '@react-dnd/invariant';
let isCallingCanDrop = false;
export class DropTargetMonitorImpl {
receiveHandlerId(targetId) {
this.targetId = targetId;
}
getHandlerId() {
return this.targetId;
}
subscribeToStateChange(listener, options) {
return this.internalMonitor.subscribeToStateChange(listener, options);
}
canDrop() {
// Cut out early if the target id has not been set. This should prevent errors
// where the user has an older version of dnd-core like in
// https://github.com/react-dnd/react-dnd/issues/1310
if (!this.targetId) {
return false;
}
invariant(!isCallingCanDrop, 'You may not call monitor.canDrop() inside your canDrop() implementation. ' + 'Read more: http://react-dnd.github.io/react-dnd/docs/api/drop-target-monitor');
try {
isCallingCanDrop = true;
return this.internalMonitor.canDropOnTarget(this.targetId);
} finally{
isCallingCanDrop = false;
}
}
isOver(options) {
if (!this.targetId) {
return false;
}
return this.internalMonitor.isOverTarget(this.targetId, options);
}
getItemType() {
return this.internalMonitor.getItemType();
}
getItem() {
return this.internalMonitor.getItem();
}
getDropResult() {
return this.internalMonitor.getDropResult();
}
didDrop() {
return this.internalMonitor.didDrop();
}
getInitialClientOffset() {
return this.internalMonitor.getInitialClientOffset();
}
getInitialSourceClientOffset() {
return this.internalMonitor.getInitialSourceClientOffset();
}
getSourceClientOffset() {
return this.internalMonitor.getSourceClientOffset();
}
getClientOffset() {
return this.internalMonitor.getClientOffset();
}
getDifferenceFromInitialOffset() {
return this.internalMonitor.getDifferenceFromInitialOffset();
}
constructor(manager){
this.targetId = null;
this.internalMonitor = manager.getMonitor();
}
}
//# sourceMappingURL=DropTargetMonitorImpl.js.map
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