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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 http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_widget_NativeMenu_h
#define mozilla_widget_NativeMenu_h
#include "nsISupportsImpl.h"
#include "Units.h"
class nsIURI;
class nsIFrame;
class nsPresContext;
namespace mozilla {
using Modifiers = uint16_t;
class ErrorResult;
class ComputedStyle;
namespace dom {
class Element;
}
namespace widget {
struct NativeMenuIcon {
RefPtr<nsIURI> mURI;
RefPtr<const ComputedStyle> mStyle;
explicit operator bool() const { return !!mURI; }
};
class NativeMenu {
public:
NS_INLINE_DECL_REFCOUNTING(NativeMenu)
// Given a <menu> or <menuitem> element, get the relevant icon's URI.
static NativeMenuIcon GetIcon(dom::Element&);
// Show this menu as a context menu at the specified position.
// This call assumes that the popupshowing event for the root popup has
// already been sent and "approved", i.e. preventDefault() was not called.
virtual void ShowAsContextMenu(nsIFrame* aClickedFrame,
const CSSIntPoint& aPosition,
bool aIsContextMenu) = 0;
// Close the menu and synchronously fire popuphiding / popuphidden events.
// Returns false if the menu wasn't open.
virtual bool Close() = 0;
// Activate aItemElement and close this menu.
// aItemElement can be nested arbitrarily deeply within submenus inside this
// menu. Only works while this menu (and any submenus on the path to the
// item) is open, otherwise aRv reports an error.
virtual void ActivateItem(dom::Element* aItemElement, Modifiers aModifiers,
int16_t aButton, ErrorResult& aRv) = 0;
// Open, or simulate the opening of, a submenu.
// aMenuElement can be nested arbitrarily deeply within submenus inside this
// menu. Only works while this menu (and any submenus on the path to the
// submenu) is open.
virtual void OpenSubmenu(dom::Element* aMenuElement) = 0;
// Closing, or simulate the closing of, a submenu.
// aMenuElement can be nested arbitrarily deeply within submenus inside this
// menu. Only works while this menu (and any submenus on the path to the
// submenu) is open.
virtual void CloseSubmenu(dom::Element* aMenuElement) = 0;
// Return this NativeMenu's DOM element.
virtual RefPtr<dom::Element> Element() = 0;
class Observer {
public:
// Called when the menu opened, after popupshown.
// No strong reference is held to the observer during the call.
virtual void OnNativeMenuOpened() = 0;
// Called when the menu closed, after popuphidden.
// No strong reference is held to the observer during the call.
virtual void OnNativeMenuClosed() = 0;
// Called before the popupshowing event of a submenu fires.
virtual void OnNativeSubMenuWillOpen(dom::Element* aPopupElement) = 0;
// Called after the popupshown event of a submenu fired.
virtual void OnNativeSubMenuDidOpen(dom::Element* aPopupElement) = 0;
// Called after the popuphidden event of a submenu fired.
virtual void OnNativeSubMenuClosed(dom::Element* aPopupElement) = 0;
// Called before the command event of an activated menu item fires.
virtual void OnNativeMenuWillActivateItem(
dom::Element* aMenuItemElement) = 0;
};
// Add an observer that gets notified of menu opening and closing.
// The menu does not keep a strong reference the observer. The observer must
// remove itself before it is destroyed.
virtual void AddObserver(Observer* aObserver) = 0;
// Remove an observer that was previously added with AddObserver.
virtual void RemoveObserver(Observer* aObserver) = 0;
protected:
virtual ~NativeMenu() = default;
};
} // namespace widget
} // namespace mozilla
#endif // mozilla_widget_NativeMenu_h
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