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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_AsyncGtkClipboardRequest_h
#define mozilla_AsyncGtkClipboardRequest_h
#include "nsClipboard.h"
namespace mozilla {
// An asynchronous clipboard request that we wait for synchronously by
// spinning the event loop.
class MOZ_STACK_CLASS AsyncGtkClipboardRequest {
// Heap-allocated object that we give GTK as a callback.
struct Request {
explicit Request(ClipboardDataType aDataType) : mDataType(aDataType) {}
void Complete(const void*);
const ClipboardDataType mDataType;
Maybe<ClipboardData> mData;
bool mTimedOut = false;
};
UniquePtr<Request> mRequest;
static void OnDataReceived(GtkClipboard*, GtkSelectionData*, gpointer);
static void OnTextReceived(GtkClipboard*, const gchar*, gpointer);
public:
// Launch a request for a particular GTK clipboard. The current status of the
// request can be observed by calling HasCompleted() and TakeResult().
AsyncGtkClipboardRequest(ClipboardDataType, int32_t aWhichClipboard,
const char* aMimeType = nullptr);
// Returns whether the request has been answered already.
bool HasCompleted() const { return mRequest->mData.isSome(); }
// Takes the result from the current request if completed, or a
// default-constructed data otherwise. The destructor will take care of
// flagging the request as timed out in that case.
ClipboardData TakeResult() {
if (!HasCompleted()) {
return {};
}
auto request = std::move(mRequest);
return request->mData.extract();
}
// If completed, frees the request if needed. Otherwise, marks it as a timed
// out request so that when it completes the Request object is properly
// freed.
~AsyncGtkClipboardRequest();
};
}; // namespace mozilla
#endif
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