1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/widget/xpwidgets/nsClipboardHelper.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,136 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 + *
1.6 + * This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#include "nsClipboardHelper.h"
1.11 +
1.12 +// basics
1.13 +#include "nsCOMPtr.h"
1.14 +#include "nsXPCOM.h"
1.15 +#include "nsISupportsPrimitives.h"
1.16 +#include "nsIServiceManager.h"
1.17 +
1.18 +// helpers
1.19 +#include "nsIClipboard.h"
1.20 +#include "nsIDocument.h"
1.21 +#include "nsIDOMDocument.h"
1.22 +#include "nsITransferable.h"
1.23 +#include "nsReadableUtils.h"
1.24 +
1.25 +NS_IMPL_ISUPPORTS(nsClipboardHelper, nsIClipboardHelper)
1.26 +
1.27 +/*****************************************************************************
1.28 + * nsClipboardHelper ctor / dtor
1.29 + *****************************************************************************/
1.30 +
1.31 +nsClipboardHelper::nsClipboardHelper()
1.32 +{
1.33 +}
1.34 +
1.35 +nsClipboardHelper::~nsClipboardHelper()
1.36 +{
1.37 + // no members, nothing to destroy
1.38 +}
1.39 +
1.40 +/*****************************************************************************
1.41 + * nsIClipboardHelper methods
1.42 + *****************************************************************************/
1.43 +
1.44 +NS_IMETHODIMP
1.45 +nsClipboardHelper::CopyStringToClipboard(const nsAString& aString,
1.46 + int32_t aClipboardID,
1.47 + nsIDOMDocument* aDocument)
1.48 +{
1.49 + nsresult rv;
1.50 +
1.51 + // get the clipboard
1.52 + nsCOMPtr<nsIClipboard>
1.53 + clipboard(do_GetService("@mozilla.org/widget/clipboard;1", &rv));
1.54 + NS_ENSURE_SUCCESS(rv, rv);
1.55 + NS_ENSURE_TRUE(clipboard, NS_ERROR_FAILURE);
1.56 +
1.57 + bool clipboardSupported;
1.58 + // don't go any further if they're asking for the selection
1.59 + // clipboard on a platform which doesn't support it (i.e., unix)
1.60 + if (nsIClipboard::kSelectionClipboard == aClipboardID) {
1.61 + rv = clipboard->SupportsSelectionClipboard(&clipboardSupported);
1.62 + NS_ENSURE_SUCCESS(rv, rv);
1.63 + if (!clipboardSupported)
1.64 + return NS_ERROR_FAILURE;
1.65 + }
1.66 +
1.67 + // don't go any further if they're asking for the find clipboard on a platform
1.68 + // which doesn't support it (i.e., non-osx)
1.69 + if (nsIClipboard::kFindClipboard == aClipboardID) {
1.70 + rv = clipboard->SupportsFindClipboard(&clipboardSupported);
1.71 + NS_ENSURE_SUCCESS(rv, rv);
1.72 + if (!clipboardSupported)
1.73 + return NS_ERROR_FAILURE;
1.74 + }
1.75 +
1.76 + // create a transferable for putting data on the clipboard
1.77 + nsCOMPtr<nsITransferable>
1.78 + trans(do_CreateInstance("@mozilla.org/widget/transferable;1", &rv));
1.79 + NS_ENSURE_SUCCESS(rv, rv);
1.80 + NS_ENSURE_TRUE(trans, NS_ERROR_FAILURE);
1.81 +
1.82 + nsCOMPtr<nsIDocument> doc = do_QueryInterface(aDocument);
1.83 + nsILoadContext* loadContext = doc ? doc->GetLoadContext() : nullptr;
1.84 + trans->Init(loadContext);
1.85 +
1.86 + // Add the text data flavor to the transferable
1.87 + rv = trans->AddDataFlavor(kUnicodeMime);
1.88 + NS_ENSURE_SUCCESS(rv, rv);
1.89 +
1.90 + // get wStrings to hold clip data
1.91 + nsCOMPtr<nsISupportsString>
1.92 + data(do_CreateInstance("@mozilla.org/supports-string;1", &rv));
1.93 + NS_ENSURE_SUCCESS(rv, rv);
1.94 + NS_ENSURE_TRUE(data, NS_ERROR_FAILURE);
1.95 +
1.96 + // populate the string
1.97 + rv = data->SetData(aString);
1.98 + NS_ENSURE_SUCCESS(rv, rv);
1.99 +
1.100 + // qi the data object an |nsISupports| so that when the transferable holds
1.101 + // onto it, it will addref the correct interface.
1.102 + nsCOMPtr<nsISupports> genericData(do_QueryInterface(data, &rv));
1.103 + NS_ENSURE_SUCCESS(rv, rv);
1.104 + NS_ENSURE_TRUE(genericData, NS_ERROR_FAILURE);
1.105 +
1.106 + // set the transfer data
1.107 + rv = trans->SetTransferData(kUnicodeMime, genericData,
1.108 + aString.Length() * 2);
1.109 + NS_ENSURE_SUCCESS(rv, rv);
1.110 +
1.111 + // put the transferable on the clipboard
1.112 + rv = clipboard->SetData(trans, nullptr, aClipboardID);
1.113 + NS_ENSURE_SUCCESS(rv, rv);
1.114 +
1.115 + return NS_OK;
1.116 +}
1.117 +
1.118 +NS_IMETHODIMP
1.119 +nsClipboardHelper::CopyString(const nsAString& aString, nsIDOMDocument* aDocument)
1.120 +{
1.121 + nsresult rv;
1.122 +
1.123 + // copy to the global clipboard. it's bad if this fails in any way.
1.124 + rv = CopyStringToClipboard(aString, nsIClipboard::kGlobalClipboard, aDocument);
1.125 + NS_ENSURE_SUCCESS(rv, rv);
1.126 +
1.127 + // unix also needs us to copy to the selection clipboard. this will
1.128 + // fail in CopyStringToClipboard if we're not on a platform that
1.129 + // supports the selection clipboard. (this could have been #ifdef
1.130 + // XP_UNIX, but using the SupportsSelectionClipboard call is the
1.131 + // more correct thing to do.
1.132 + //
1.133 + // if this fails in any way other than "not being unix", we'll get
1.134 + // the assertion we need in CopyStringToClipboard, and we needn't
1.135 + // assert again here.
1.136 + CopyStringToClipboard(aString, nsIClipboard::kSelectionClipboard, aDocument);
1.137 +
1.138 + return NS_OK;
1.139 +}
