forked from mirrors/gecko-dev
61 lines
2 KiB
C++
61 lines
2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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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 mozilla_AsyncGtkClipboardRequest_h
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#define mozilla_AsyncGtkClipboardRequest_h
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#include "nsClipboard.h"
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namespace mozilla {
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// An asynchronous clipboard request that we wait for synchronously by
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// spinning the event loop.
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class MOZ_STACK_CLASS AsyncGtkClipboardRequest {
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// Heap-allocated object that we give GTK as a callback.
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struct Request {
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explicit Request(ClipboardDataType aDataType) : mDataType(aDataType) {}
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void Complete(const void*);
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const ClipboardDataType mDataType;
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Maybe<ClipboardData> mData;
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bool mTimedOut = false;
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};
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UniquePtr<Request> mRequest;
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static void OnDataReceived(GtkClipboard*, GtkSelectionData*, gpointer);
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static void OnTextReceived(GtkClipboard*, const gchar*, gpointer);
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public:
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// Launch a request for a particular GTK clipboard. The current status of the
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// request can be observed by calling HasCompleted() and TakeResult().
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AsyncGtkClipboardRequest(ClipboardDataType, int32_t aWhichClipboard,
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const char* aMimeType = nullptr);
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// Returns whether the request has been answered already.
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bool HasCompleted() const { return mRequest->mData.isSome(); }
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// Takes the result from the current request if completed, or a
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// default-constructed data otherwise. The destructor will take care of
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// flagging the request as timed out in that case.
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ClipboardData TakeResult() {
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if (!HasCompleted()) {
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return {};
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}
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auto request = std::move(mRequest);
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return request->mData.extract();
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}
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// If completed, frees the request if needed. Otherwise, marks it as a timed
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// out request so that when it completes the Request object is properly
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// freed.
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~AsyncGtkClipboardRequest();
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};
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}; // namespace mozilla
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#endif
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