blob: b7dedad944517c77c1ad6eaaa278a1985d461360 [file] [log] [blame]
// Copyright 2014 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.
#include <memory>
#include "base/macros.h"
#include "ui/views_bridge_mac/views_bridge_mac_export.h"
@class NSWindow;
namespace views_bridge_mac {
class CocoaMouseCaptureDelegate;
// Basic mouse capture to simulate ::SetCapture() from Windows. This is used to
// support menu widgets (e.g. on Combo boxes). Clicking anywhere other than the
// menu should dismiss the menu and "swallow" the mouse event. All events are
// forwarded, but only events to the same application are "swallowed", which is
// consistent with how native NSMenus behave.
class VIEWS_BRIDGE_MAC_EXPORT CocoaMouseCapture {
explicit CocoaMouseCapture(CocoaMouseCaptureDelegate* delegate);
// Returns the NSWindow with capture or nil if no window has capture
// currently.
static NSWindow* GetGlobalCaptureWindow();
// True if the event tap is active (i.e. not stolen by a later instance).
bool IsActive() const { return !!active_handle_; }
class ActiveEventTap;
// Deactivates the event tap if still active.
void OnOtherClientGotCapture();
CocoaMouseCaptureDelegate* delegate_; // Weak. Owns this.
// The active event tap for this capture. Owned by this, but can be cleared
// out early if another instance of CocoaMouseCapture is created.
std::unique_ptr<ActiveEventTap> active_handle_;
} // namespace views_bridge_mac