134 lines
4.2 KiB
C++
134 lines
4.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsClipboardHelper.h"
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// basics
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#include "nsCOMPtr.h"
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#include "nsXPCOM.h"
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#include "nsISupportsPrimitives.h"
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#include "nsIServiceManager.h"
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// helpers
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#include "nsIClipboard.h"
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#include "nsIDocument.h"
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#include "nsIDOMDocument.h"
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#include "nsITransferable.h"
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#include "nsReadableUtils.h"
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NS_IMPL_ISUPPORTS(nsClipboardHelper, nsIClipboardHelper)
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/*****************************************************************************
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* nsClipboardHelper ctor / dtor
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*****************************************************************************/
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nsClipboardHelper::nsClipboardHelper()
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{
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}
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nsClipboardHelper::~nsClipboardHelper()
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{
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// no members, nothing to destroy
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}
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/*****************************************************************************
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* nsIClipboardHelper methods
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*****************************************************************************/
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NS_IMETHODIMP
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nsClipboardHelper::CopyStringToClipboard(const nsAString& aString,
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int32_t aClipboardID)
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{
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nsresult rv;
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// get the clipboard
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nsCOMPtr<nsIClipboard>
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clipboard(do_GetService("@mozilla.org/widget/clipboard;1", &rv));
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NS_ENSURE_SUCCESS(rv, rv);
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NS_ENSURE_TRUE(clipboard, NS_ERROR_FAILURE);
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bool clipboardSupported;
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// don't go any further if they're asking for the selection
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// clipboard on a platform which doesn't support it (i.e., unix)
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if (nsIClipboard::kSelectionClipboard == aClipboardID) {
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rv = clipboard->SupportsSelectionClipboard(&clipboardSupported);
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NS_ENSURE_SUCCESS(rv, rv);
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if (!clipboardSupported)
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return NS_ERROR_FAILURE;
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}
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// don't go any further if they're asking for the find clipboard on a platform
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// which doesn't support it (i.e., non-osx)
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if (nsIClipboard::kFindClipboard == aClipboardID) {
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rv = clipboard->SupportsFindClipboard(&clipboardSupported);
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NS_ENSURE_SUCCESS(rv, rv);
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if (!clipboardSupported)
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return NS_ERROR_FAILURE;
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}
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// create a transferable for putting data on the clipboard
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nsCOMPtr<nsITransferable>
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trans(do_CreateInstance("@mozilla.org/widget/transferable;1", &rv));
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NS_ENSURE_SUCCESS(rv, rv);
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NS_ENSURE_TRUE(trans, NS_ERROR_FAILURE);
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trans->Init(nullptr);
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// Add the text data flavor to the transferable
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rv = trans->AddDataFlavor(kUnicodeMime);
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NS_ENSURE_SUCCESS(rv, rv);
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// get wStrings to hold clip data
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nsCOMPtr<nsISupportsString>
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data(do_CreateInstance("@mozilla.org/supports-string;1", &rv));
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NS_ENSURE_SUCCESS(rv, rv);
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NS_ENSURE_TRUE(data, NS_ERROR_FAILURE);
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// populate the string
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rv = data->SetData(aString);
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NS_ENSURE_SUCCESS(rv, rv);
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// qi the data object an |nsISupports| so that when the transferable holds
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// onto it, it will addref the correct interface.
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nsCOMPtr<nsISupports> genericData(do_QueryInterface(data, &rv));
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NS_ENSURE_SUCCESS(rv, rv);
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NS_ENSURE_TRUE(genericData, NS_ERROR_FAILURE);
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// set the transfer data
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rv = trans->SetTransferData(kUnicodeMime, genericData,
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aString.Length() * 2);
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NS_ENSURE_SUCCESS(rv, rv);
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// put the transferable on the clipboard
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rv = clipboard->SetData(trans, nullptr, aClipboardID);
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NS_ENSURE_SUCCESS(rv, rv);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsClipboardHelper::CopyString(const nsAString& aString)
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{
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nsresult rv;
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// copy to the global clipboard. it's bad if this fails in any way.
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rv = CopyStringToClipboard(aString, nsIClipboard::kGlobalClipboard);
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NS_ENSURE_SUCCESS(rv, rv);
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// unix also needs us to copy to the selection clipboard. this will
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// fail in CopyStringToClipboard if we're not on a platform that
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// supports the selection clipboard. (this could have been #ifdef
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// XP_UNIX, but using the SupportsSelectionClipboard call is the
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// more correct thing to do.
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//
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// if this fails in any way other than "not being unix", we'll get
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// the assertion we need in CopyStringToClipboard, and we needn't
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// assert again here.
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CopyStringToClipboard(aString, nsIClipboard::kSelectionClipboard);
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return NS_OK;
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}
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