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/* -*- Mode: C++; tab-width: 8; 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 nsXBLWindowKeyHandler_h__
#define nsXBLWindowKeyHandler_h__
#include "mozilla/EventForwards.h"
#include "nsWeakPtr.h"
#include "nsIDOMEventListener.h"
class nsIAtom;
class nsIDOMElement;
class nsIDOMKeyEvent;
class nsXBLSpecialDocInfo;
class nsXBLPrototypeHandler;
namespace mozilla {
class EventListenerManager;
namespace dom {
class Element;
class EventTarget;
struct IgnoreModifierState;
} // namespace dom
} // namespace mozilla
class nsXBLWindowKeyHandler : public nsIDOMEventListener
{
typedef mozilla::dom::IgnoreModifierState IgnoreModifierState;
typedef mozilla::EventListenerManager EventListenerManager;
public:
nsXBLWindowKeyHandler(nsIDOMElement* aElement, mozilla::dom::EventTarget* aTarget);
void InstallKeyboardEventListenersTo(
EventListenerManager* aEventListenerManager);
void RemoveKeyboardEventListenersFrom(
EventListenerManager* aEventListenerManager);
NS_DECL_ISUPPORTS
NS_DECL_NSIDOMEVENTLISTENER
protected:
virtual ~nsXBLWindowKeyHandler();
nsresult WalkHandlers(nsIDOMKeyEvent* aKeyEvent, nsIAtom* aEventType);
// walk the handlers, looking for one to handle the event
bool WalkHandlersInternal(nsIDOMKeyEvent* aKeyEvent,
nsIAtom* aEventType,
nsXBLPrototypeHandler* aHandler,
bool aExecute,
bool* aOutReservedForChrome = nullptr);
// walk the handlers for aEvent, aCharCode and aIgnoreModifierState. Execute
// it if aExecute = true.
bool WalkHandlersAndExecute(nsIDOMKeyEvent* aKeyEvent, nsIAtom* aEventType,
nsXBLPrototypeHandler* aHandler,
uint32_t aCharCode,
const IgnoreModifierState& aIgnoreModifierState,
bool aExecute,
bool* aOutReservedForChrome = nullptr);
// HandleEvent function for the capturing phase in the default event group.
void HandleEventOnCaptureInDefaultEventGroup(nsIDOMKeyEvent* aEvent);
// HandleEvent function for the capturing phase in the system event group.
void HandleEventOnCaptureInSystemEventGroup(nsIDOMKeyEvent* aEvent);
// Check if any handler would handle the given event. Optionally returns
// whether the command handler for the event is marked with the "reserved"
// attribute.
bool HasHandlerForEvent(nsIDOMKeyEvent* aEvent,
bool* aOutReservedForChrome = nullptr);
// Returns event type for matching between aWidgetKeyboardEvent and
// shortcut key handlers. This is used for calling WalkHandlers(),
// WalkHandlersInternal() and WalkHandlersAndExecute().
nsIAtom* ConvertEventToDOMEventType(
const mozilla::WidgetKeyboardEvent& aWidgetKeyboardEvent) const;
// lazily load the handlers. Overridden to handle being attached
// to a particular element rather than the document
nsresult EnsureHandlers();
// Is an HTML editable element focused
bool IsHTMLEditableFieldFocused();
// Returns the element which was passed as a parameter to the constructor,
// unless the element has been removed from the document. Optionally returns
// whether the disabled attribute is set on the element (assuming the element
// is non-null).
already_AddRefed<mozilla::dom::Element> GetElement(bool* aIsDisabled = nullptr);
/**
* GetElementForHandler() retrieves an element for the handler. The element
* may be a command element or a key element.
*
* @param aHandler The handler.
* @param aElementForHandler Must not be nullptr. The element is returned to
* this.
* @return true if the handler is valid. Otherwise, false.
*/
bool GetElementForHandler(nsXBLPrototypeHandler* aHandler,
mozilla::dom::Element** aElementForHandler);
/**
* IsExecutableElement() returns true if aElement is executable.
* Otherwise, false. aElement should be a command element or a key element.
*/
bool IsExecutableElement(mozilla::dom::Element* aElement) const;
// Using weak pointer to the DOM Element.
nsWeakPtr mWeakPtrForElement;
mozilla::dom::EventTarget* mTarget; // weak ref
// these are not owning references; the prototype handlers are owned
// by the prototype bindings which are owned by the docinfo.
nsXBLPrototypeHandler* mHandler; // platform bindings
nsXBLPrototypeHandler* mUserHandler; // user-specific bindings
// holds document info about bindings
static nsXBLSpecialDocInfo* sXBLSpecialDocInfo;
static uint32_t sRefCnt;
};
already_AddRefed<nsXBLWindowKeyHandler>
NS_NewXBLWindowKeyHandler(nsIDOMElement* aElement,
mozilla::dom::EventTarget* aTarget);
#endif
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