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The Async Clipboard API now allows using arbitrary promises for passing write data, potentially enabling websites to delay writing data to an arbitrary future, which may surprise the user. This patch introduces a solution: a new write request will automatically cancel any previous pending request. To implement that, this patch introduces a new method to nsIClipboard, new XPCOM interfaces, and new IPC to efficiently track individual write requests. Additionally, a new helper base class, ClipboardSetDataHelper, is introduced in widget to facilitate platform code sharing. Differential Revision: https://phabricator.services.mozilla.com/D174090
42 lines
1.5 KiB
C++
42 lines
1.5 KiB
C++
/* -*- Mode: c++; c-basic-offset: 2; tab-width: 20; indent-tabs-mode: nil; -*-
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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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#ifndef NS_CLIPBOARD_H
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#define NS_CLIPBOARD_H
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#include "nsBaseClipboard.h"
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class nsClipboard final : public ClipboardSetDataHelper {
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private:
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~nsClipboard() = default;
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public:
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nsClipboard() = default;
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NS_DECL_ISUPPORTS_INHERITED
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// nsIClipboard
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NS_IMETHOD GetData(nsITransferable* aTransferable,
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int32_t aWhichClipboard) override;
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NS_IMETHOD EmptyClipboard(int32_t aWhichClipboard) override;
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NS_IMETHOD HasDataMatchingFlavors(const nsTArray<nsCString>& aFlavorList,
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int32_t aWhichClipboard,
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bool* _retval) override;
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NS_IMETHOD IsClipboardTypeSupported(int32_t aWhichClipboard,
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bool* _retval) override;
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RefPtr<mozilla::GenericPromise> AsyncGetData(
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nsITransferable* aTransferable, int32_t aWhichClipboard) override;
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RefPtr<DataFlavorsPromise> AsyncHasDataMatchingFlavors(
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const nsTArray<nsCString>& aFlavorList, int32_t aWhichClipboard) override;
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protected:
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// Implement the native clipboard behavior.
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NS_IMETHOD SetNativeClipboardData(nsITransferable* aTransferable,
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nsIClipboardOwner* aOwner,
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int32_t aWhichClipboard) override;
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};
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#endif
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