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-rw-r--r--widget/gtk/AsyncGtkClipboardRequest.h61
1 files changed, 61 insertions, 0 deletions
diff --git a/widget/gtk/AsyncGtkClipboardRequest.h b/widget/gtk/AsyncGtkClipboardRequest.h
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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