author Mike Hommey <mh+mozilla@glandium.org>
Fri, 11 Jan 2019 16:01:15 +0000
changeset 453570 daf50f25895db073e44d50fecf2e4f6fe873865d
parent 448947 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1519307 - Add a new project to build useful parts of breakpad independently. r=froydnj With `ac_add_options --enable-project=tools/crashreporter` in a mozconfig, `./mach build` builds minidump_stackwalk, dump_syms and fileid. One caveat is that due to limitation in how the build system works currently, it's cumbersome to keep dump_syms as a host program for Gecko, and to make it a target program for this project. For now, keep it as a host program. We're not going to use it on automation, but it's still convenient to have for quick local builds (I've had to resort to awful hacks downstream). Differential Revision: https://phabricator.services.mozilla.com/D16299

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 nsAutoRollup_h__
#define nsAutoRollup_h__

#include "mozilla/Attributes.h"  // for MOZ_RAII
#include "mozilla/StaticPtr.h"   // for StaticRefPtr
#include "nsIContent.h"

namespace mozilla {
namespace widget {

// A situation can occur when a mouse event occurs over a menu label while the
// menu popup is already open. The expected behaviour is to close the popup.
// This happens by calling nsIRollupListener::Rollup before the mouse event is
// processed. However, in cases where the mouse event is not consumed, this
// event will then get targeted at the menu label causing the menu to open
// again. To prevent this, we store in sLastRollup a reference to the popup
// that was closed during the Rollup call, and prevent this popup from
// reopening while processing the mouse event.
// sLastRollup can only be set while an nsAutoRollup is in scope;
// when it goes out of scope sLastRollup is cleared automatically.
// As sLastRollup is static, it can be retrieved by calling
// nsAutoRollup::GetLastRollup.
class MOZ_RAII nsAutoRollup {

  // Convenience constructor that creates a nsAutoRollup and also sets
  // the last rollup.
  explicit nsAutoRollup(nsIContent* aRollup);

  static void SetLastRollup(nsIContent* aLastRollup);
  // Return the popup that was last rolled up, or null if there isn't one.
  static nsIContent* GetLastRollup();

  // Whether sLastRollup was clear when this nsAutoRollup
  // was created.
  bool mWasClear;

  // The number of nsAutoRollup instances active.
  static uint32_t sCount;
  // The last rolled up popup.
  static StaticRefPtr<nsIContent> sLastRollup;

}  // namespace widget
}  // namespace mozilla

#endif  // nsAutoRollup_h__