Return a enumeration of the state of handling of InputEvents.

third_party/WebKit/Source/core/page/DragController.cpp

 /*
  * Copyright (C) 2007, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 225 matching lines @@
 {
     ASSERT(dragData);
     m_documentUnderMouse = m_page->deprecatedLocalMainFrame()->documentAtPoint(dragData->clientPosition());
     if ((m_dragDestinationAction & DragDestinationActionDHTML) && m_documentIsHandlingDrag) {
         RefPtrWillBeRawPtr<LocalFrame> mainFrame = m_page->deprecatedLocalMainFrame();
         bool preventedDefault = false;
         if (mainFrame->view()) {
             // Sending an event can result in the destruction of the view and part.
             DataTransfer* dataTransfer = createDraggingDataTransfer(DataTransferReadable, dragData);
             dataTransfer->setSourceOperation(dragData->draggingSourceOperationMask());
-            preventedDefault = mainFrame->eventHandler().performDragAndDrop(createMouseEvent(dragData), dataTransfer);
+            preventedDefault = mainFrame->eventHandler().performDragAndDrop(createMouseEvent(dragData), dataTransfer) != WebInputEventResult::NotHandled;
             dataTransfer->setAccessPolicy(DataTransferNumb); // Invalidate clipboard here for security
         }
         if (preventedDefault) {
             m_documentUnderMouse = nullptr;
             cancelDrag();
             return true;
         }
     }
 
     if ((m_dragDestinationAction & DragDestinationActionEdit) && concludeEditDrag(dragData)) {
@@ skipping 338 matching lines @@
     if (!mainFrame->view())
         return false;
 
     RefPtrWillBeRawPtr<FrameView> viewProtector(mainFrame->view());
     DataTransferAccessPolicy policy = m_documentUnderMouse->securityOrigin()->isLocal() ? DataTransferReadable : DataTransferTypesReadable;
     DataTransfer* dataTransfer = createDraggingDataTransfer(policy, dragData);
     DragOperation srcOpMask = dragData->draggingSourceOperationMask();
     dataTransfer->setSourceOperation(srcOpMask);
 
     PlatformMouseEvent event = createMouseEvent(dragData);
-    if (!mainFrame->eventHandler().updateDragAndDrop(event, dataTransfer)) {
+    if (mainFrame->eventHandler().updateDragAndDrop(event, dataTransfer) == WebInputEventResult::NotHandled) {
         dataTransfer->setAccessPolicy(DataTransferNumb); // invalidate clipboard here for security
         return false;
     }
 
     operation = dataTransfer->destinationOperation();
     if (dataTransfer->dropEffectIsUninitialized()) {
         operation = defaultOperationForDrag(srcOpMask);
     } else if (!(srcOpMask & operation)) {
         // The element picked an operation which is not supported by the source
         operation = DragOperationNone;
@@ skipping 345 matching lines @@
 
 DEFINE_TRACE(DragController)
 {
     visitor->trace(m_page);
     visitor->trace(m_documentUnderMouse);
     visitor->trace(m_dragInitiator);
     visitor->trace(m_fileInputElementUnderMouse);
 }
 
 } // namespace blink