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