gecko/widget/xpwidgets/nsBaseClipboard.cpp
2012-05-21 12:12:37 +01:00

124 lines
3.2 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#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;
}