PositionedEventTargeting.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=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_PositionedEventTargeting_h

#define mozilla_PositionedEventTargeting_h

#include <stdint.h>

#include "RelativeTo.h"

#include "mozilla/EventForwards.h"

class nsIFrame;

struct nsPoint;

namespace mozilla {

enum { INPUT_IGNORE_ROOT_SCROLL_FRAME = 0x01 };

/**

 * Finds the target frame for a pointer event given the event type and location.

 * This can look for frames within a rectangle surrounding the actual location

 * that are suitable targets, to account for inaccurate pointing devices.

*/

nsIFrame* FindFrameTargetedByInputEvent(

    WidgetGUIEvent* aEvent, RelativeTo aRootFrame,

    const nsPoint& aPointRelativeToRootFrame, uint32_t aFlags = 0);

class MOZ_RAII EventRetargetSuppression {

 public:

  EventRetargetSuppression();

  ~EventRetargetSuppression();

  static bool IsActive();

 private:

  static uint32_t sSuppressionCount;

};

}  // namespace mozilla

#endif /* mozilla_PositionedEventTargeting_h */