PRBool
nsEditorHookUtils::DoAllowDropHook(nsIDOMDocument *aDoc, nsIDOMEvent *aEvent,
nsIDragSession *aSession)
{
nsCOMPtr<nsISimpleEnumerator> enumerator;
GetHookEnumeratorFromDocument(aDoc, getter_AddRefs(enumerator));
if (!enumerator)
return PR_TRUE;
PRBool hasMoreHooks = PR_FALSE;
while (NS_SUCCEEDED(enumerator->HasMoreElements(&hasMoreHooks)) && hasMoreHooks)
{
nsCOMPtr<nsISupports> isupp;
if (NS_FAILED(enumerator->GetNext(getter_AddRefs(isupp))))
break;
nsCOMPtr<nsIClipboardDragDropHooks> override = do_QueryInterface(isupp);
if (override)
{
PRBool allowDrop = PR_TRUE;
nsresult hookResult = override->AllowDrop(aEvent, aSession, &allowDrop);
NS_ASSERTION(NS_SUCCEEDED(hookResult), "hook failure in AllowDrop");
if (!allowDrop)
return PR_FALSE;
}
}
return PR_TRUE;
}
bool
nsEditorHookUtils::DoInsertionHook(nsIDOMDocument *aDoc, nsIDOMEvent *aDropEvent,
nsITransferable *aTrans)
{
nsCOMPtr<nsISimpleEnumerator> enumerator;
GetHookEnumeratorFromDocument(aDoc, getter_AddRefs(enumerator));
NS_ENSURE_TRUE(enumerator, PR_TRUE);
bool hasMoreHooks = false;
while (NS_SUCCEEDED(enumerator->HasMoreElements(&hasMoreHooks)) && hasMoreHooks)
{
nsCOMPtr<nsISupports> isupp;
if (NS_FAILED(enumerator->GetNext(getter_AddRefs(isupp))))
break;
nsCOMPtr<nsIClipboardDragDropHooks> override = do_QueryInterface(isupp);
if (override)
{
bool doInsert = true;
#ifdef DEBUG
nsresult hookResult =
#endif
override->OnPasteOrDrop(aDropEvent, aTrans, &doInsert);
NS_ASSERTION(NS_SUCCEEDED(hookResult), "hook failure in OnPasteOrDrop");
NS_ENSURE_TRUE(doInsert, PR_FALSE);
}
}
return PR_TRUE;
}
PRBool
nsEditorHookUtils::DoDragHook(nsIDOMDocument *aDoc, nsIDOMEvent *aEvent,
nsITransferable *aTrans)
{
nsCOMPtr<nsISimpleEnumerator> enumerator;
GetHookEnumeratorFromDocument(aDoc, getter_AddRefs(enumerator));
if (!enumerator)
return PR_TRUE;
PRBool hasMoreHooks = PR_FALSE;
while (NS_SUCCEEDED(enumerator->HasMoreElements(&hasMoreHooks)) && hasMoreHooks)
{
nsCOMPtr<nsISupports> isupp;
if (NS_FAILED(enumerator->GetNext(getter_AddRefs(isupp))))
break;
nsCOMPtr<nsIClipboardDragDropHooks> override = do_QueryInterface(isupp);
if (override)
{
PRBool canInvokeDrag = PR_TRUE;
nsresult hookResult = override->OnCopyOrDrag(aEvent, aTrans, &canInvokeDrag);
NS_ASSERTION(NS_SUCCEEDED(hookResult), "hook failure in OnCopyOrDrag");
if (!canInvokeDrag)
return PR_FALSE;
}
}
return PR_TRUE;
}
