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- // Copyright (c) 2012 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #ifndef BASE_MAC_SCOPED_SENDING_EVENT_H_
- #define BASE_MAC_SCOPED_SENDING_EVENT_H_
- #include "base/base_export.h"
- #include "base/message_loop/message_pump_mac.h"
- // Nested event loops can pump IPC messages, including
- // script-initiated tab closes, which could release objects that the
- // nested event loop might message. CrAppProtocol defines how to ask
- // the embedding NSApplication subclass if an event is currently being
- // handled, in which case such closes are deferred to the top-level
- // event loop.
- //
- // ScopedSendingEvent allows script-initiated event loops to work like
- // a nested event loop, as such events do not arrive via -sendEvent:.
- // CrAppControlProtocol lets ScopedSendingEvent tell the embedding
- // NSApplication what to return from -handlingSendEvent.
- @protocol CrAppControlProtocol<CrAppProtocol>
- - (void)setHandlingSendEvent:(BOOL)handlingSendEvent;
- @end
- namespace base::mac {
- class BASE_EXPORT ScopedSendingEvent {
- public:
- ScopedSendingEvent();
- ScopedSendingEvent(const ScopedSendingEvent&) = delete;
- ScopedSendingEvent& operator=(const ScopedSendingEvent&) = delete;
- ~ScopedSendingEvent();
- private:
- // The NSApp in control at the time the constructor was run, to be
- // sure the |handling_| setting is restored appropriately.
- NSObject<CrAppControlProtocol>* app_;
- BOOL handling_; // Value of -[app_ handlingSendEvent] at construction.
- };
- } // namespace base::mac
- #endif // BASE_MAC_SCOPED_SENDING_EVENT_H_
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