gecko-dev/widget/xpwidgets/nsBaseClipboard.cpp

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4.7 KiB
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
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*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
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* decision by deleting the provisions above and replace them with the notice
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#include "nsBaseClipboard.h"
#include "nsIClipboardOwner.h"
#include "nsCOMPtr.h"
#include "nsXPCOM.h"
#include "nsISupportsPrimitives.h"
nsBaseClipboard::nsBaseClipboard()
{
mClipboardOwner = nsnull;
mTransferable = nsnull;
mIgnoreEmptyNotification = false;
}
nsBaseClipboard::~nsBaseClipboard()
{
EmptyClipboard(kSelectionClipboard);
EmptyClipboard(kGlobalClipboard);
}
NS_IMPL_ISUPPORTS1(nsBaseClipboard, nsIClipboard)
/**
* Sets the transferable object
*
*/
NS_IMETHODIMP nsBaseClipboard::SetData(nsITransferable * aTransferable, nsIClipboardOwner * anOwner,
PRInt32 aWhichClipboard)
{
NS_ASSERTION ( aTransferable, "clipboard given a null transferable" );
if (aTransferable == mTransferable && anOwner == mClipboardOwner)
return NS_OK;
bool selectClipPresent;
SupportsSelectionClipboard(&selectClipPresent);
if ( !selectClipPresent && aWhichClipboard != kGlobalClipboard )
return NS_ERROR_FAILURE;
EmptyClipboard(aWhichClipboard);
mClipboardOwner = anOwner;
if ( anOwner )
NS_ADDREF(mClipboardOwner);
mTransferable = aTransferable;
nsresult rv = NS_ERROR_FAILURE;
if ( mTransferable ) {
NS_ADDREF(mTransferable);
if (!mPrivacyHandler) {
rv = NS_NewClipboardPrivacyHandler(getter_AddRefs(mPrivacyHandler));
NS_ENSURE_SUCCESS(rv, rv);
}
rv = mPrivacyHandler->PrepareDataForClipboard(mTransferable);
NS_ENSURE_SUCCESS(rv, rv);
rv = SetNativeClipboardData(aWhichClipboard);
}
return rv;
}
/**
* Gets the transferable object
*
*/
NS_IMETHODIMP nsBaseClipboard::GetData(nsITransferable * aTransferable, PRInt32 aWhichClipboard)
{
NS_ASSERTION ( aTransferable, "clipboard given a null transferable" );
bool selectClipPresent;
SupportsSelectionClipboard(&selectClipPresent);
if ( !selectClipPresent && aWhichClipboard != kGlobalClipboard )
return NS_ERROR_FAILURE;
if ( aTransferable )
return GetNativeClipboardData(aTransferable, aWhichClipboard);
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP nsBaseClipboard::EmptyClipboard(PRInt32 aWhichClipboard)
{
bool selectClipPresent;
SupportsSelectionClipboard(&selectClipPresent);
if ( !selectClipPresent && aWhichClipboard != kGlobalClipboard )
return NS_ERROR_FAILURE;
if (mIgnoreEmptyNotification)
return NS_OK;
if ( mClipboardOwner ) {
mClipboardOwner->LosingOwnership(mTransferable);
NS_RELEASE(mClipboardOwner);
}
NS_IF_RELEASE(mTransferable);
return NS_OK;
}
NS_IMETHODIMP
nsBaseClipboard::HasDataMatchingFlavors(const char** aFlavorList,
PRUint32 aLength,
PRInt32 aWhichClipboard,
bool* outResult)
{
*outResult = true; // say we always do.
return NS_OK;
}
NS_IMETHODIMP
nsBaseClipboard::SupportsSelectionClipboard(bool* _retval)
{
*_retval = false; // we don't support the selection clipboard by default.
return NS_OK;
}