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126 lines
4.7 KiB
C++
126 lines
4.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsXBLWindowKeyHandler_h__
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#define nsXBLWindowKeyHandler_h__
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#include "nsWeakPtr.h"
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#include "nsIDOMEventListener.h"
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class nsIAtom;
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class nsIDOMElement;
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class nsIDOMKeyEvent;
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class nsXBLSpecialDocInfo;
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class nsXBLPrototypeHandler;
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namespace mozilla {
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class EventListenerManager;
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namespace dom {
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class Element;
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class EventTarget;
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struct IgnoreModifierState;
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} // namespace dom
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} // namespace mozilla
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class nsXBLWindowKeyHandler : public nsIDOMEventListener
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{
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typedef mozilla::dom::IgnoreModifierState IgnoreModifierState;
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typedef mozilla::EventListenerManager EventListenerManager;
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public:
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nsXBLWindowKeyHandler(nsIDOMElement* aElement, mozilla::dom::EventTarget* aTarget);
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void InstallKeyboardEventListenersTo(
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EventListenerManager* aEventListenerManager);
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void RemoveKeyboardEventListenersFrom(
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EventListenerManager* aEventListenerManager);
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NS_DECL_ISUPPORTS
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NS_DECL_NSIDOMEVENTLISTENER
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protected:
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virtual ~nsXBLWindowKeyHandler();
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nsresult WalkHandlers(nsIDOMKeyEvent* aKeyEvent, nsIAtom* aEventType);
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// walk the handlers, looking for one to handle the event
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bool WalkHandlersInternal(nsIDOMKeyEvent* aKeyEvent,
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nsIAtom* aEventType,
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nsXBLPrototypeHandler* aHandler,
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bool aExecute,
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bool* aOutReservedForChrome = nullptr);
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// walk the handlers for aEvent, aCharCode and aIgnoreModifierState. Execute
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// it if aExecute = true.
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bool WalkHandlersAndExecute(nsIDOMKeyEvent* aKeyEvent, nsIAtom* aEventType,
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nsXBLPrototypeHandler* aHandler,
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uint32_t aCharCode,
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const IgnoreModifierState& aIgnoreModifierState,
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bool aExecute,
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bool* aOutReservedForChrome = nullptr);
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// HandleEvent function for the capturing phase in the default event group.
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void HandleEventOnCaptureInDefaultEventGroup(nsIDOMKeyEvent* aEvent);
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// HandleEvent function for the capturing phase in the system event group.
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void HandleEventOnCaptureInSystemEventGroup(nsIDOMKeyEvent* aEvent);
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// Check if any handler would handle the given event. Optionally returns
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// whether the command handler for the event is marked with the "reserved"
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// attribute.
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bool HasHandlerForEvent(nsIDOMKeyEvent* aEvent,
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bool* aOutReservedForChrome = nullptr);
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// lazily load the handlers. Overridden to handle being attached
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// to a particular element rather than the document
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nsresult EnsureHandlers();
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// Is an HTML editable element focused
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bool IsHTMLEditableFieldFocused();
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// Returns the element which was passed as a parameter to the constructor,
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// unless the element has been removed from the document. Optionally returns
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// whether the disabled attribute is set on the element (assuming the element
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// is non-null).
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already_AddRefed<mozilla::dom::Element> GetElement(bool* aIsDisabled = nullptr);
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/**
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* GetElementForHandler() retrieves an element for the handler. The element
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* may be a command element or a key element.
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*
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* @param aHandler The handler.
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* @param aElementForHandler Must not be nullptr. The element is returned to
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* this.
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* @return true if the handler is valid. Otherwise, false.
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*/
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bool GetElementForHandler(nsXBLPrototypeHandler* aHandler,
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mozilla::dom::Element** aElementForHandler);
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/**
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* IsExecutableElement() returns true if aElement is executable.
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* Otherwise, false. aElement should be a command element or a key element.
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*/
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bool IsExecutableElement(mozilla::dom::Element* aElement) const;
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// Using weak pointer to the DOM Element.
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nsWeakPtr mWeakPtrForElement;
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mozilla::dom::EventTarget* mTarget; // weak ref
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// these are not owning references; the prototype handlers are owned
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// by the prototype bindings which are owned by the docinfo.
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nsXBLPrototypeHandler* mHandler; // platform bindings
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nsXBLPrototypeHandler* mUserHandler; // user-specific bindings
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// holds document info about bindings
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static nsXBLSpecialDocInfo* sXBLSpecialDocInfo;
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static uint32_t sRefCnt;
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};
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already_AddRefed<nsXBLWindowKeyHandler>
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NS_NewXBLWindowKeyHandler(nsIDOMElement* aElement,
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mozilla::dom::EventTarget* aTarget);
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#endif
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