michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "nsCOMPtr.h"
michael@0: #include "nsXBLPrototypeHandler.h"
michael@0: #include "nsXBLWindowKeyHandler.h"
michael@0: #include "nsIContent.h"
michael@0: #include "nsIAtom.h"
michael@0: #include "nsIDOMKeyEvent.h"
michael@0: #include "nsXBLService.h"
michael@0: #include "nsIServiceManager.h"
michael@0: #include "nsGkAtoms.h"
michael@0: #include "nsXBLDocumentInfo.h"
michael@0: #include "nsIDOMElement.h"
michael@0: #include "nsFocusManager.h"
michael@0: #include "nsIURI.h"
michael@0: #include "nsNetUtil.h"
michael@0: #include "nsContentUtils.h"
michael@0: #include "nsXBLPrototypeBinding.h"
michael@0: #include "nsPIDOMWindow.h"
michael@0: #include "nsIDocShell.h"
michael@0: #include "nsIPresShell.h"
michael@0: #include "mozilla/EventStateManager.h"
michael@0: #include "nsISelectionController.h"
michael@0: #include "mozilla/Preferences.h"
michael@0: #include "mozilla/TextEvents.h"
michael@0: #include "mozilla/dom/Element.h"
michael@0: #include "mozilla/dom/Event.h"
michael@0: #include "nsIEditor.h"
michael@0: #include "nsIHTMLEditor.h"
michael@0: #include "nsIDOMDocument.h"
michael@0: 
michael@0: using namespace mozilla;
michael@0: using namespace mozilla::dom;
michael@0: 
michael@0: class nsXBLSpecialDocInfo : public nsIObserver
michael@0: {
michael@0: public:
michael@0:   nsRefPtr<nsXBLDocumentInfo> mHTMLBindings;
michael@0:   nsRefPtr<nsXBLDocumentInfo> mUserHTMLBindings;
michael@0: 
michael@0:   static const char sHTMLBindingStr[];
michael@0:   static const char sUserHTMLBindingStr[];
michael@0: 
michael@0:   bool mInitialized;
michael@0: 
michael@0: public:
michael@0:   NS_DECL_ISUPPORTS
michael@0:   NS_DECL_NSIOBSERVER
michael@0: 
michael@0:   void LoadDocInfo();
michael@0:   void GetAllHandlers(const char* aType,
michael@0:                       nsXBLPrototypeHandler** handler,
michael@0:                       nsXBLPrototypeHandler** userHandler);
michael@0:   void GetHandlers(nsXBLDocumentInfo* aInfo,
michael@0:                    const nsACString& aRef,
michael@0:                    nsXBLPrototypeHandler** aResult);
michael@0: 
michael@0:   nsXBLSpecialDocInfo() : mInitialized(false) {}
michael@0: 
michael@0:   virtual ~nsXBLSpecialDocInfo() {}
michael@0: 
michael@0: };
michael@0: 
michael@0: const char nsXBLSpecialDocInfo::sHTMLBindingStr[] =
michael@0:   "chrome://global/content/platformHTMLBindings.xml";
michael@0: 
michael@0: NS_IMPL_ISUPPORTS(nsXBLSpecialDocInfo, nsIObserver)
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsXBLSpecialDocInfo::Observe(nsISupports* aSubject,
michael@0:                              const char* aTopic,
michael@0:                              const char16_t* aData)
michael@0: {
michael@0:   MOZ_ASSERT(!strcmp(aTopic, "xpcom-shutdown"), "wrong topic");
michael@0: 
michael@0:   // On shutdown, clear our fields to avoid an extra cycle collection.
michael@0:   mHTMLBindings = nullptr;
michael@0:   mUserHTMLBindings = nullptr;
michael@0:   mInitialized = false;
michael@0:   nsContentUtils::UnregisterShutdownObserver(this);
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: void nsXBLSpecialDocInfo::LoadDocInfo()
michael@0: {
michael@0:   if (mInitialized)
michael@0:     return;
michael@0:   mInitialized = true;
michael@0:   nsContentUtils::RegisterShutdownObserver(this);
michael@0: 
michael@0:   nsXBLService* xblService = nsXBLService::GetInstance();
michael@0:   if (!xblService)
michael@0:     return;
michael@0: 
michael@0:   // Obtain the platform doc info
michael@0:   nsCOMPtr<nsIURI> bindingURI;
michael@0:   NS_NewURI(getter_AddRefs(bindingURI), sHTMLBindingStr);
michael@0:   if (!bindingURI) {
michael@0:     return;
michael@0:   }
michael@0:   xblService->LoadBindingDocumentInfo(nullptr, nullptr,
michael@0:                                       bindingURI,
michael@0:                                       nullptr,
michael@0:                                       true, 
michael@0:                                       getter_AddRefs(mHTMLBindings));
michael@0: 
michael@0:   const nsAdoptingCString& userHTMLBindingStr =
michael@0:     Preferences::GetCString("dom.userHTMLBindings.uri");
michael@0:   if (!userHTMLBindingStr.IsEmpty()) {
michael@0:     NS_NewURI(getter_AddRefs(bindingURI), userHTMLBindingStr);
michael@0:     if (!bindingURI) {
michael@0:       return;
michael@0:     }
michael@0: 
michael@0:     xblService->LoadBindingDocumentInfo(nullptr, nullptr,
michael@0:                                         bindingURI,
michael@0:                                         nullptr,
michael@0:                                         true, 
michael@0:                                         getter_AddRefs(mUserHTMLBindings));
michael@0:   }
michael@0: }
michael@0: 
michael@0: //
michael@0: // GetHandlers
michael@0: //
michael@0: // 
michael@0: void
michael@0: nsXBLSpecialDocInfo::GetHandlers(nsXBLDocumentInfo* aInfo,
michael@0:                                  const nsACString& aRef,
michael@0:                                  nsXBLPrototypeHandler** aResult)
michael@0: {
michael@0:   nsXBLPrototypeBinding* binding = aInfo->GetPrototypeBinding(aRef);
michael@0:   
michael@0:   NS_ASSERTION(binding, "No binding found for the XBL window key handler.");
michael@0:   if (!binding)
michael@0:     return;
michael@0: 
michael@0:   *aResult = binding->GetPrototypeHandlers();
michael@0: }
michael@0: 
michael@0: void
michael@0: nsXBLSpecialDocInfo::GetAllHandlers(const char* aType,
michael@0:                                     nsXBLPrototypeHandler** aHandler,
michael@0:                                     nsXBLPrototypeHandler** aUserHandler)
michael@0: {
michael@0:   if (mUserHTMLBindings) {
michael@0:     nsAutoCString type(aType);
michael@0:     type.Append("User");
michael@0:     GetHandlers(mUserHTMLBindings, type, aUserHandler);
michael@0:   }
michael@0:   if (mHTMLBindings) {
michael@0:     GetHandlers(mHTMLBindings, nsDependentCString(aType), aHandler);
michael@0:   }
michael@0: }
michael@0: 
michael@0: // Init statics
michael@0: nsXBLSpecialDocInfo* nsXBLWindowKeyHandler::sXBLSpecialDocInfo = nullptr;
michael@0: uint32_t nsXBLWindowKeyHandler::sRefCnt = 0;
michael@0: 
michael@0: nsXBLWindowKeyHandler::nsXBLWindowKeyHandler(nsIDOMElement* aElement,
michael@0:                                              EventTarget* aTarget)
michael@0:   : mTarget(aTarget),
michael@0:     mHandler(nullptr),
michael@0:     mUserHandler(nullptr)
michael@0: {
michael@0:   mWeakPtrForElement = do_GetWeakReference(aElement);
michael@0:   ++sRefCnt;
michael@0: }
michael@0: 
michael@0: nsXBLWindowKeyHandler::~nsXBLWindowKeyHandler()
michael@0: {
michael@0:   // If mWeakPtrForElement is non-null, we created a prototype handler.
michael@0:   if (mWeakPtrForElement)
michael@0:     delete mHandler;
michael@0: 
michael@0:   --sRefCnt;
michael@0:   if (!sRefCnt) {
michael@0:     NS_IF_RELEASE(sXBLSpecialDocInfo);
michael@0:   }
michael@0: }
michael@0: 
michael@0: NS_IMPL_ISUPPORTS(nsXBLWindowKeyHandler,
michael@0:                   nsIDOMEventListener)
michael@0: 
michael@0: static void
michael@0: BuildHandlerChain(nsIContent* aContent, nsXBLPrototypeHandler** aResult)
michael@0: {
michael@0:   *aResult = nullptr;
michael@0: 
michael@0:   // Since we chain each handler onto the next handler,
michael@0:   // we'll enumerate them here in reverse so that when we
michael@0:   // walk the chain they'll come out in the original order
michael@0:   for (nsIContent* key = aContent->GetLastChild();
michael@0:        key;
michael@0:        key = key->GetPreviousSibling()) {
michael@0: 
michael@0:     if (key->NodeInfo()->Equals(nsGkAtoms::key, kNameSpaceID_XUL)) {
michael@0:       // Check whether the key element has empty value at key/char attribute.
michael@0:       // Such element is used by localizers for alternative shortcut key
michael@0:       // definition on the locale. See bug 426501.
michael@0:       nsAutoString valKey, valCharCode, valKeyCode;
michael@0:       bool attrExists =
michael@0:         key->GetAttr(kNameSpaceID_None, nsGkAtoms::key, valKey) ||
michael@0:         key->GetAttr(kNameSpaceID_None, nsGkAtoms::charcode, valCharCode) ||
michael@0:         key->GetAttr(kNameSpaceID_None, nsGkAtoms::keycode, valKeyCode);
michael@0:       if (attrExists &&
michael@0:           valKey.IsEmpty() && valCharCode.IsEmpty() && valKeyCode.IsEmpty())
michael@0:         continue;
michael@0: 
michael@0:       nsXBLPrototypeHandler* handler = new nsXBLPrototypeHandler(key);
michael@0: 
michael@0:       if (!handler)
michael@0:         return;
michael@0: 
michael@0:       handler->SetNextHandler(*aResult);
michael@0:       *aResult = handler;
michael@0:     }
michael@0:   }
michael@0: }
michael@0: 
michael@0: //
michael@0: // EnsureHandlers
michael@0: //    
michael@0: // Lazily load the XBL handlers. Overridden to handle being attached
michael@0: // to a particular element rather than the document
michael@0: //
michael@0: nsresult
michael@0: nsXBLWindowKeyHandler::EnsureHandlers()
michael@0: {
michael@0:   nsCOMPtr<Element> el = GetElement();
michael@0:   NS_ENSURE_STATE(!mWeakPtrForElement || el);
michael@0:   if (el) {
michael@0:     // We are actually a XUL <keyset>.
michael@0:     if (mHandler)
michael@0:       return NS_OK;
michael@0: 
michael@0:     nsCOMPtr<nsIContent> content(do_QueryInterface(el));
michael@0:     BuildHandlerChain(content, &mHandler);
michael@0:   } else { // We are an XBL file of handlers.
michael@0:     if (!sXBLSpecialDocInfo) {
michael@0:       sXBLSpecialDocInfo = new nsXBLSpecialDocInfo();
michael@0:       NS_ADDREF(sXBLSpecialDocInfo);
michael@0:     }
michael@0:     sXBLSpecialDocInfo->LoadDocInfo();
michael@0: 
michael@0:     // Now determine which handlers we should be using.
michael@0:     if (IsHTMLEditableFieldFocused()) {
michael@0:       sXBLSpecialDocInfo->GetAllHandlers("editor", &mHandler, &mUserHandler);
michael@0:     }
michael@0:     else {
michael@0:       sXBLSpecialDocInfo->GetAllHandlers("browser", &mHandler, &mUserHandler);
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: nsXBLWindowKeyHandler::WalkHandlers(nsIDOMKeyEvent* aKeyEvent, nsIAtom* aEventType)
michael@0: {
michael@0:   bool prevent;
michael@0:   aKeyEvent->GetDefaultPrevented(&prevent);
michael@0:   if (prevent)
michael@0:     return NS_OK;
michael@0: 
michael@0:   bool trustedEvent = false;
michael@0:   // Don't process the event if it was not dispatched from a trusted source
michael@0:   aKeyEvent->GetIsTrusted(&trustedEvent);
michael@0: 
michael@0:   if (!trustedEvent)
michael@0:     return NS_OK;
michael@0: 
michael@0:   nsresult rv = EnsureHandlers();
michael@0:   NS_ENSURE_SUCCESS(rv, rv);
michael@0: 
michael@0:   bool isDisabled;
michael@0:   nsCOMPtr<Element> el = GetElement(&isDisabled);
michael@0:   if (!el) {
michael@0:     if (mUserHandler) {
michael@0:       WalkHandlersInternal(aKeyEvent, aEventType, mUserHandler, true);
michael@0:       aKeyEvent->GetDefaultPrevented(&prevent);
michael@0:       if (prevent)
michael@0:         return NS_OK; // Handled by the user bindings. Our work here is done.
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   // skip keysets that are disabled
michael@0:   if (el && isDisabled) {
michael@0:     return NS_OK;
michael@0:   }
michael@0: 
michael@0:   WalkHandlersInternal(aKeyEvent, aEventType, mHandler, true);
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsXBLWindowKeyHandler::HandleEvent(nsIDOMEvent* aEvent)
michael@0: {
michael@0:   nsCOMPtr<nsIDOMKeyEvent> keyEvent(do_QueryInterface(aEvent));
michael@0:   NS_ENSURE_TRUE(keyEvent, NS_ERROR_INVALID_ARG);
michael@0: 
michael@0:   uint16_t eventPhase;
michael@0:   aEvent->GetEventPhase(&eventPhase);
michael@0:   if (eventPhase == nsIDOMEvent::CAPTURING_PHASE) {
michael@0:     HandleEventOnCapture(keyEvent);
michael@0:     return NS_OK;
michael@0:   }
michael@0: 
michael@0:   nsAutoString eventType;
michael@0:   aEvent->GetType(eventType);
michael@0:   nsCOMPtr<nsIAtom> eventTypeAtom = do_GetAtom(eventType);
michael@0:   NS_ENSURE_TRUE(eventTypeAtom, NS_ERROR_OUT_OF_MEMORY);
michael@0: 
michael@0:   return WalkHandlers(keyEvent, eventTypeAtom);
michael@0: }
michael@0: 
michael@0: void
michael@0: nsXBLWindowKeyHandler::HandleEventOnCapture(nsIDOMKeyEvent* aEvent)
michael@0: {
michael@0:   WidgetKeyboardEvent* widgetEvent =
michael@0:     aEvent->GetInternalNSEvent()->AsKeyboardEvent();
michael@0: 
michael@0:   if (widgetEvent->mFlags.mNoCrossProcessBoundaryForwarding) {
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   nsCOMPtr<mozilla::dom::Element> originalTarget =
michael@0:     do_QueryInterface(aEvent->GetInternalNSEvent()->originalTarget);
michael@0:   if (!EventStateManager::IsRemoteTarget(originalTarget)) {
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   if (!HasHandlerForEvent(aEvent)) {
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   // If this event hasn't been marked as mNoCrossProcessBoundaryForwarding
michael@0:   // yet, it means it wasn't processed by content. We'll not call any
michael@0:   // of the handlers at this moment, and will wait for the event to be
michael@0:   // redispatched with mNoCrossProcessBoundaryForwarding = 1 to process it.
michael@0: 
michael@0:   // Inform the child process that this is a event that we want a reply
michael@0:   // from.
michael@0:   widgetEvent->mFlags.mWantReplyFromContentProcess = 1;
michael@0:   aEvent->StopPropagation();
michael@0: }
michael@0: 
michael@0: //
michael@0: // EventMatched
michael@0: //
michael@0: // See if the given handler cares about this particular key event
michael@0: //
michael@0: bool
michael@0: nsXBLWindowKeyHandler::EventMatched(nsXBLPrototypeHandler* inHandler,
michael@0:                                     nsIAtom* inEventType,
michael@0:                                     nsIDOMKeyEvent* inEvent,
michael@0:                                     uint32_t aCharCode, bool aIgnoreShiftKey)
michael@0: {
michael@0:   return inHandler->KeyEventMatched(inEventType, inEvent, aCharCode,
michael@0:                                     aIgnoreShiftKey);
michael@0: }
michael@0: 
michael@0: bool
michael@0: nsXBLWindowKeyHandler::IsHTMLEditableFieldFocused()
michael@0: {
michael@0:   nsIFocusManager* fm = nsFocusManager::GetFocusManager();
michael@0:   if (!fm)
michael@0:     return false;
michael@0: 
michael@0:   nsCOMPtr<nsIDOMWindow> focusedWindow;
michael@0:   fm->GetFocusedWindow(getter_AddRefs(focusedWindow));
michael@0:   if (!focusedWindow)
michael@0:     return false;
michael@0: 
michael@0:   nsCOMPtr<nsPIDOMWindow> piwin(do_QueryInterface(focusedWindow));
michael@0:   nsIDocShell *docShell = piwin->GetDocShell();
michael@0:   if (!docShell) {
michael@0:     return false;
michael@0:   }
michael@0: 
michael@0:   nsCOMPtr<nsIEditor> editor;
michael@0:   docShell->GetEditor(getter_AddRefs(editor));
michael@0:   nsCOMPtr<nsIHTMLEditor> htmlEditor = do_QueryInterface(editor);
michael@0:   if (!htmlEditor) {
michael@0:     return false;
michael@0:   }
michael@0: 
michael@0:   nsCOMPtr<nsIDOMDocument> domDocument;
michael@0:   editor->GetDocument(getter_AddRefs(domDocument));
michael@0:   nsCOMPtr<nsIDocument> doc = do_QueryInterface(domDocument);
michael@0:   if (doc->HasFlag(NODE_IS_EDITABLE)) {
michael@0:     // Don't need to perform any checks in designMode documents.
michael@0:     return true;
michael@0:   }
michael@0: 
michael@0:   nsCOMPtr<nsIDOMElement> focusedElement;
michael@0:   fm->GetFocusedElement(getter_AddRefs(focusedElement));
michael@0:   nsCOMPtr<nsINode> focusedNode = do_QueryInterface(focusedElement);
michael@0:   if (focusedNode) {
michael@0:     // If there is a focused element, make sure it's in the active editing host.
michael@0:     // Note that GetActiveEditingHost finds the current editing host based on
michael@0:     // the document's selection.  Even though the document selection is usually
michael@0:     // collapsed to where the focus is, but the page may modify the selection
michael@0:     // without our knowledge, in which case this check will do something useful.
michael@0:     nsCOMPtr<Element> activeEditingHost = htmlEditor->GetActiveEditingHost();
michael@0:     if (!activeEditingHost) {
michael@0:       return false;
michael@0:     }
michael@0:     return nsContentUtils::ContentIsDescendantOf(focusedNode, activeEditingHost);
michael@0:   }
michael@0: 
michael@0:   return false;
michael@0: }
michael@0: 
michael@0: //
michael@0: // WalkHandlersInternal and WalkHandlersAndExecute
michael@0: //
michael@0: // Given a particular DOM event and a pointer to the first handler in the list,
michael@0: // scan through the list to find something to handle the event. If aExecute = true,
michael@0: // the handler will be executed; otherwise just return an answer telling if a handler
michael@0: // for that event was found.
michael@0: //
michael@0: bool
michael@0: nsXBLWindowKeyHandler::WalkHandlersInternal(nsIDOMKeyEvent* aKeyEvent,
michael@0:                                             nsIAtom* aEventType, 
michael@0:                                             nsXBLPrototypeHandler* aHandler,
michael@0:                                             bool aExecute)
michael@0: {
michael@0:   nsAutoTArray<nsShortcutCandidate, 10> accessKeys;
michael@0:   nsContentUtils::GetAccelKeyCandidates(aKeyEvent, accessKeys);
michael@0: 
michael@0:   if (accessKeys.IsEmpty()) {
michael@0:     return WalkHandlersAndExecute(aKeyEvent, aEventType, aHandler,
michael@0:                                   0, false, aExecute);
michael@0:   }
michael@0: 
michael@0:   for (uint32_t i = 0; i < accessKeys.Length(); ++i) {
michael@0:     nsShortcutCandidate &key = accessKeys[i];
michael@0:     if (WalkHandlersAndExecute(aKeyEvent, aEventType, aHandler,
michael@0:                                key.mCharCode, key.mIgnoreShift, aExecute))
michael@0:       return true;
michael@0:   }
michael@0:   return false;
michael@0: }
michael@0: 
michael@0: bool
michael@0: nsXBLWindowKeyHandler::WalkHandlersAndExecute(nsIDOMKeyEvent* aKeyEvent,
michael@0:                                               nsIAtom* aEventType,
michael@0:                                               nsXBLPrototypeHandler* aHandler,
michael@0:                                               uint32_t aCharCode,
michael@0:                                               bool aIgnoreShiftKey,
michael@0:                                               bool aExecute)
michael@0: {
michael@0:   nsresult rv;
michael@0: 
michael@0:   // Try all of the handlers until we find one that matches the event.
michael@0:   for (nsXBLPrototypeHandler *currHandler = aHandler; currHandler;
michael@0:        currHandler = currHandler->GetNextHandler()) {
michael@0:     bool stopped = aKeyEvent->IsDispatchStopped();
michael@0:     if (stopped) {
michael@0:       // The event is finished, don't execute any more handlers
michael@0:       return false;
michael@0:     }
michael@0: 
michael@0:     if (!EventMatched(currHandler, aEventType, aKeyEvent,
michael@0:                       aCharCode, aIgnoreShiftKey))
michael@0:       continue;  // try the next one
michael@0: 
michael@0:     // Before executing this handler, check that it's not disabled,
michael@0:     // and that it has something to do (oncommand of the <key> or its
michael@0:     // <command> is non-empty).
michael@0:     nsCOMPtr<nsIContent> elt = currHandler->GetHandlerElement();
michael@0:     nsCOMPtr<Element> commandElt;
michael@0: 
michael@0:     // See if we're in a XUL doc.
michael@0:     nsCOMPtr<Element> el = GetElement();
michael@0:     if (el && elt) {
michael@0:       // We are.  Obtain our command attribute.
michael@0:       nsAutoString command;
michael@0:       elt->GetAttr(kNameSpaceID_None, nsGkAtoms::command, command);
michael@0:       if (!command.IsEmpty()) {
michael@0:         // Locate the command element in question.  Note that we
michael@0:         // know "elt" is in a doc if we're dealing with it here.
michael@0:         NS_ASSERTION(elt->IsInDoc(), "elt must be in document");
michael@0:         nsIDocument *doc = elt->GetCurrentDoc();
michael@0:         if (doc)
michael@0:           commandElt = do_QueryInterface(doc->GetElementById(command));
michael@0: 
michael@0:         if (!commandElt) {
michael@0:           NS_ERROR("A XUL <key> is observing a command that doesn't exist. Unable to execute key binding!");
michael@0:           continue;
michael@0:         }
michael@0:       }
michael@0:     }
michael@0: 
michael@0:     if (!commandElt) {
michael@0:       commandElt = do_QueryInterface(elt);
michael@0:     }
michael@0: 
michael@0:     if (commandElt) {
michael@0:       nsAutoString value;
michael@0:       commandElt->GetAttribute(NS_LITERAL_STRING("disabled"), value);
michael@0:       if (value.EqualsLiteral("true")) {
michael@0:         continue;  // this handler is disabled, try the next one
michael@0:       }
michael@0: 
michael@0:       // Check that there is an oncommand handler
michael@0:       commandElt->GetAttribute(NS_LITERAL_STRING("oncommand"), value);
michael@0:       if (value.IsEmpty()) {
michael@0:         continue;  // nothing to do
michael@0:       }
michael@0:     }
michael@0: 
michael@0:     nsCOMPtr<EventTarget> piTarget;
michael@0:     nsCOMPtr<Element> element = GetElement();
michael@0:     if (element) {
michael@0:       piTarget = commandElt;
michael@0:     } else {
michael@0:       piTarget = mTarget;
michael@0:     }
michael@0: 
michael@0:     if (!aExecute) {
michael@0:       return true;
michael@0:     }
michael@0: 
michael@0:     rv = currHandler->ExecuteHandler(piTarget, aKeyEvent);
michael@0:     if (NS_SUCCEEDED(rv)) {
michael@0:       return true;
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   return false;
michael@0: }
michael@0: 
michael@0: bool
michael@0: nsXBLWindowKeyHandler::HasHandlerForEvent(nsIDOMKeyEvent* aEvent)
michael@0: {
michael@0:   if (!aEvent->InternalDOMEvent()->IsTrusted()) {
michael@0:     return false;
michael@0:   }
michael@0: 
michael@0:   nsresult rv = EnsureHandlers();
michael@0:   NS_ENSURE_SUCCESS(rv, false);
michael@0: 
michael@0:   bool isDisabled;
michael@0:   nsCOMPtr<Element> el = GetElement(&isDisabled);
michael@0:   if (el && isDisabled) {
michael@0:     return false;
michael@0:   }
michael@0: 
michael@0:   nsAutoString eventType;
michael@0:   aEvent->GetType(eventType);
michael@0:   nsCOMPtr<nsIAtom> eventTypeAtom = do_GetAtom(eventType);
michael@0:   NS_ENSURE_TRUE(eventTypeAtom, false);
michael@0: 
michael@0:   return WalkHandlersInternal(aEvent, eventTypeAtom, mHandler, false);
michael@0: }
michael@0: 
michael@0: already_AddRefed<Element>
michael@0: nsXBLWindowKeyHandler::GetElement(bool* aIsDisabled)
michael@0: {
michael@0:   nsCOMPtr<Element> element = do_QueryReferent(mWeakPtrForElement);
michael@0:   if (element && aIsDisabled) {
michael@0:     *aIsDisabled = element->AttrValueIs(kNameSpaceID_None, nsGkAtoms::disabled,
michael@0:                                         nsGkAtoms::_true, eCaseMatters);
michael@0:   }
michael@0:   return element.forget();
michael@0: }
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: already_AddRefed<nsXBLWindowKeyHandler>
michael@0: NS_NewXBLWindowKeyHandler(nsIDOMElement* aElement, EventTarget* aTarget)
michael@0: {
michael@0:   nsRefPtr<nsXBLWindowKeyHandler> result =
michael@0:     new nsXBLWindowKeyHandler(aElement, aTarget);
michael@0:   return result.forget();
michael@0: }