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/* -*- 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 */
#ifndef __nsIRollupListener_h__
#define __nsIRollupListener_h__
#include "nsTArray.h"
#include "nsPoint.h"
#include "Units.h"
class nsIContent;
class nsIWidget;
class nsIRollupListener {
enum class FlushViews : bool { No, Yes };
enum class AllowAnimations : bool { No, Yes };
struct RollupOptions {
// aCount is the number of popups in a chain to close. If this is
// zero, then all popups are closed.
uint32_t mCount = 0;
// If this is true, then views should be flushed after the rollup.
FlushViews mFlush = FlushViews::No;
// This is the mouse pointer position where the event that triggered the
// rollup occurred, which may be nullptr.
const mozilla::LayoutDeviceIntPoint* mPoint = nullptr;
// Whether to allow panel animations.
AllowAnimations mAllowAnimations = AllowAnimations::Yes;
* Notifies the object to rollup, optionally returning the node that
* was just rolled up in aLastRolledUp, if non-null.
* aLastRolledUp is not addrefed.
* Returns true if the event that the caller is processing should be consumed.
virtual bool Rollup(const RollupOptions&,
nsIContent** aLastRolledUp = nullptr) = 0;
* Asks the RollupListener if it should rollup on mouse wheel events
virtual bool ShouldRollupOnMouseWheelEvent() = 0;
* Asks the RollupListener if it should consume mouse wheel events
virtual bool ShouldConsumeOnMouseWheelEvent() = 0;
* Asks the RollupListener if it should rollup on mouse activate, eg. X-Mouse
virtual bool ShouldRollupOnMouseActivate() = 0;
* Retrieve the widgets for open menus and store them in the array
* aWidgetChain. The number of menus of the same type should be returned,
* for example, if a context menu is open, return only the number of menus
* that are part of the context menu chain. This allows closing up only
* those menus in different situations. The returned value should be exactly
* the same number of widgets added to aWidgetChain.
virtual uint32_t GetSubmenuWidgetChain(
nsTArray<nsIWidget*>* aWidgetChain) = 0;
virtual nsIWidget* GetRollupWidget() = 0;
* If a native menu is currently shown, closes the menu.
* Returns true if a native menu was open.
virtual bool RollupNativeMenu() { return false; }
#endif /* __nsIRollupListener_h__ */