michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "nsBaseClipboard.h"
michael@0: 
michael@0: #include "nsIClipboardOwner.h"
michael@0: #include "nsCOMPtr.h"
michael@0: #include "nsXPCOM.h"
michael@0: #include "nsISupportsPrimitives.h"
michael@0: 
michael@0: nsBaseClipboard::nsBaseClipboard()
michael@0: {
michael@0:   mClipboardOwner          = nullptr;
michael@0:   mTransferable            = nullptr;
michael@0:   mIgnoreEmptyNotification = false;
michael@0:   mEmptyingForSetData      = false;
michael@0: }
michael@0: 
michael@0: nsBaseClipboard::~nsBaseClipboard()
michael@0: {
michael@0:   EmptyClipboard(kSelectionClipboard);
michael@0:   EmptyClipboard(kGlobalClipboard);
michael@0:   EmptyClipboard(kFindClipboard);
michael@0: }
michael@0: 
michael@0: NS_IMPL_ISUPPORTS(nsBaseClipboard, nsIClipboard)
michael@0: 
michael@0: /**
michael@0:   * Sets the transferable object
michael@0:   *
michael@0:   */
michael@0: NS_IMETHODIMP nsBaseClipboard::SetData(nsITransferable * aTransferable, nsIClipboardOwner * anOwner,
michael@0:                                         int32_t aWhichClipboard)
michael@0: {
michael@0:   NS_ASSERTION ( aTransferable, "clipboard given a null transferable" );
michael@0: 
michael@0:   if (aTransferable == mTransferable && anOwner == mClipboardOwner)
michael@0:     return NS_OK;
michael@0:   bool selectClipPresent;
michael@0:   SupportsSelectionClipboard(&selectClipPresent);
michael@0:   bool findClipPresent;
michael@0:   SupportsFindClipboard(&findClipPresent);
michael@0:   if ( !selectClipPresent && !findClipPresent && aWhichClipboard != kGlobalClipboard )
michael@0:     return NS_ERROR_FAILURE;
michael@0: 
michael@0:   mEmptyingForSetData = true;
michael@0:   EmptyClipboard(aWhichClipboard);
michael@0:   mEmptyingForSetData = false;
michael@0: 
michael@0:   mClipboardOwner = anOwner;
michael@0:   if ( anOwner )
michael@0:     NS_ADDREF(mClipboardOwner);
michael@0: 
michael@0:   mTransferable = aTransferable;
michael@0:   
michael@0:   nsresult rv = NS_ERROR_FAILURE;
michael@0: 
michael@0:   if ( mTransferable ) {
michael@0:     NS_ADDREF(mTransferable);
michael@0:     if (!mPrivacyHandler) {
michael@0:       rv = NS_NewClipboardPrivacyHandler(getter_AddRefs(mPrivacyHandler));
michael@0:       NS_ENSURE_SUCCESS(rv, rv);
michael@0:     }
michael@0:     rv = mPrivacyHandler->PrepareDataForClipboard(mTransferable);
michael@0:     NS_ENSURE_SUCCESS(rv, rv);
michael@0:     rv = SetNativeClipboardData(aWhichClipboard);
michael@0:   }
michael@0:   
michael@0:   return rv;
michael@0: }
michael@0: 
michael@0: /**
michael@0:   * Gets the transferable object
michael@0:   *
michael@0:   */
michael@0: NS_IMETHODIMP nsBaseClipboard::GetData(nsITransferable * aTransferable, int32_t aWhichClipboard)
michael@0: {
michael@0:   NS_ASSERTION ( aTransferable, "clipboard given a null transferable" );
michael@0: 
michael@0:   bool selectClipPresent;
michael@0:   SupportsSelectionClipboard(&selectClipPresent);
michael@0:   bool findClipPresent;
michael@0:   SupportsFindClipboard(&findClipPresent);
michael@0:   if ( !selectClipPresent && !findClipPresent && aWhichClipboard != kGlobalClipboard )
michael@0:     return NS_ERROR_FAILURE;
michael@0: 
michael@0:   if ( aTransferable )
michael@0:     return GetNativeClipboardData(aTransferable, aWhichClipboard);
michael@0: 
michael@0:   return NS_ERROR_FAILURE;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP nsBaseClipboard::EmptyClipboard(int32_t aWhichClipboard)
michael@0: {
michael@0:   bool selectClipPresent;
michael@0:   SupportsSelectionClipboard(&selectClipPresent);
michael@0:   bool findClipPresent;
michael@0:   SupportsFindClipboard(&findClipPresent);
michael@0:   if ( !selectClipPresent && !findClipPresent && aWhichClipboard != kGlobalClipboard )
michael@0:     return NS_ERROR_FAILURE;
michael@0: 
michael@0:   if (mIgnoreEmptyNotification)
michael@0:     return NS_OK;
michael@0: 
michael@0:   if ( mClipboardOwner ) {
michael@0:     mClipboardOwner->LosingOwnership(mTransferable);
michael@0:     NS_RELEASE(mClipboardOwner);
michael@0:   }
michael@0: 
michael@0:   NS_IF_RELEASE(mTransferable);
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsBaseClipboard::HasDataMatchingFlavors(const char** aFlavorList,
michael@0:                                         uint32_t aLength,
michael@0:                                         int32_t aWhichClipboard,
michael@0:                                         bool* outResult) 
michael@0: {
michael@0:   *outResult = true;  // say we always do.
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsBaseClipboard::SupportsSelectionClipboard(bool* _retval)
michael@0: {
michael@0:   *_retval = false;   // we don't support the selection clipboard by default.
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsBaseClipboard::SupportsFindClipboard(bool* _retval)
michael@0: {
michael@0:   *_retval = false;   // we don't support the find clipboard by default.
michael@0:   return NS_OK;
michael@0: }