286 lines
8.4 KiB
C++
286 lines
8.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Original Author: David W. Hyatt (hyatt@netscape.com)
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* - Mike Pinkerton (pinkerton@netscape.com)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsCOMPtr.h"
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#include "nsXBLPrototypeHandler.h"
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#include "nsXBLWindowKeyHandler.h"
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#include "nsXBLAtoms.h"
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#include "nsIContent.h"
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#include "nsIAtom.h"
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#include "nsIDOMNSUIEvent.h"
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#include "nsIDOMKeyEvent.h"
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#include "nsIDOMEventReceiver.h"
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#include "nsIDOMNSEvent.h"
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#include "nsXBLService.h"
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#include "nsIServiceManager.h"
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#include "nsHTMLAtoms.h"
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#include "nsIXBLDocumentInfo.h"
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#include "nsIScriptGlobalObject.h"
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#include "nsIDOMElement.h"
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#include "nsXBLAtoms.h"
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#include "nsINativeKeyBindings.h"
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#include "nsIController.h"
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#include "nsIControllers.h"
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#include "nsIDOMWindowInternal.h"
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#include "nsIFocusController.h"
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#include "nsPIWindowRoot.h"
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static nsINativeKeyBindings *sNativeEditorBindings = nsnull;
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nsXBLWindowKeyHandler::nsXBLWindowKeyHandler(nsIDOMElement* aElement, nsIDOMEventReceiver* aReceiver)
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: nsXBLWindowHandler(aElement, aReceiver)
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{
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}
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nsXBLWindowKeyHandler::~nsXBLWindowKeyHandler()
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{
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// If mElement is non-null, we created a prototype handler.
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if (mElement)
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delete mHandler;
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}
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NS_IMPL_ISUPPORTS1(nsXBLWindowKeyHandler, nsIDOMKeyListener)
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static void
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BuildHandlerChain(nsIContent* aContent, nsXBLPrototypeHandler** aResult)
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{
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nsXBLPrototypeHandler *firstHandler = nsnull, *currHandler = nsnull;
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PRUint32 handlerCount = aContent->GetChildCount();
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for (PRUint32 j = 0; j < handlerCount; j++) {
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nsIContent *handler = aContent->GetChildAt(j);
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nsXBLPrototypeHandler* newHandler = new nsXBLPrototypeHandler(handler);
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if (newHandler) {
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if (currHandler)
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currHandler->SetNextHandler(newHandler);
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else firstHandler = newHandler;
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currHandler = newHandler;
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}
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}
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*aResult = firstHandler;
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}
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//
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// EnsureHandlers
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//
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// Lazily load the XBL handlers. Overridden to handle being attached
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// to a particular element rather than the document
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//
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nsresult
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nsXBLWindowKeyHandler::EnsureHandlers(PRBool *aIsEditor)
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{
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if (mElement) {
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// We are actually a XUL <keyset>.
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if (aIsEditor)
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*aIsEditor = PR_FALSE;
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if (mHandler)
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return NS_OK;
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nsCOMPtr<nsIContent> content(do_QueryInterface(mElement));
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BuildHandlerChain(content, &mHandler);
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}
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else // We are an XBL file of handlers.
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nsXBLWindowHandler::EnsureHandlers(aIsEditor);
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return NS_OK;
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}
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static nsINativeKeyBindings*
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GetEditorKeyBindings()
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{
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static PRBool noBindings = PR_FALSE;
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if (!sNativeEditorBindings && !noBindings) {
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CallGetService(NS_NATIVEKEYBINDINGS_CONTRACTID_PREFIX "editor",
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&sNativeEditorBindings);
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if (!sNativeEditorBindings) {
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noBindings = PR_TRUE;
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}
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}
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return sNativeEditorBindings;
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}
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static void
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DoCommandCallback(const char *aCommand, void *aData)
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{
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nsIControllers *controllers = NS_STATIC_CAST(nsIControllers*, aData);
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if (controllers) {
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nsCOMPtr<nsIController> controller;
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controllers->GetControllerForCommand(aCommand, getter_AddRefs(controller));
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if (controller) {
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controller->DoCommand(aCommand);
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}
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}
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}
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NS_IMETHODIMP
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nsXBLWindowKeyHandler::WalkHandlers(nsIDOMEvent* aKeyEvent, nsIAtom* aEventType)
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{
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nsCOMPtr<nsIDOMNSUIEvent> evt = do_QueryInterface(aKeyEvent);
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PRBool prevent;
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evt->GetPreventDefault(&prevent);
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if (prevent)
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return NS_OK;
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nsCOMPtr<nsIDOMNSEvent> domNSEvent = do_QueryInterface(aKeyEvent);
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PRBool trustedEvent = PR_FALSE;
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if (domNSEvent) {
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//Don't process the event if it was not dispatched from a trusted source
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domNSEvent->GetIsTrusted(&trustedEvent);
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}
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if (!trustedEvent)
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return NS_OK;
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// Make sure our event is really a key event
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nsCOMPtr<nsIDOMKeyEvent> keyEvent(do_QueryInterface(aKeyEvent));
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if (!keyEvent)
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return NS_OK;
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PRBool isEditor;
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EnsureHandlers(&isEditor);
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if (!mElement) {
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if (mUserHandler) {
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WalkHandlersInternal(aKeyEvent, aEventType, mUserHandler);
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evt->GetPreventDefault(&prevent);
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if (prevent)
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return NS_OK; // Handled by the user bindings. Our work here is done.
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}
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}
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WalkHandlersInternal(aKeyEvent, aEventType, mHandler);
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nsINativeKeyBindings *nativeBindings;
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if (isEditor && (nativeBindings = GetEditorKeyBindings())) {
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nsNativeKeyEvent nativeEvent;
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keyEvent->GetCharCode(&nativeEvent.charCode);
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keyEvent->GetKeyCode(&nativeEvent.keyCode);
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keyEvent->GetAltKey(&nativeEvent.altKey);
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keyEvent->GetCtrlKey(&nativeEvent.ctrlKey);
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keyEvent->GetShiftKey(&nativeEvent.shiftKey);
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keyEvent->GetMetaKey(&nativeEvent.metaKey);
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// get the DOM window we're attached to
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nsCOMPtr<nsIControllers> controllers;
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nsCOMPtr<nsPIWindowRoot> root = do_QueryInterface(mReceiver);
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if (root) {
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nsCOMPtr<nsIFocusController> fc;
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root->GetFocusController(getter_AddRefs(fc));
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if (fc) {
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fc->GetControllers(getter_AddRefs(controllers));
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}
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}
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PRBool handled;
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if (aEventType == nsXBLAtoms::keyup) {
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handled = sNativeEditorBindings->KeyUp(nativeEvent,
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DoCommandCallback, controllers);
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} else if (aEventType == nsXBLAtoms::keypress) {
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handled = sNativeEditorBindings->KeyPress(nativeEvent,
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DoCommandCallback, controllers);
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} else {
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handled = sNativeEditorBindings->KeyDown(nativeEvent,
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DoCommandCallback, controllers);
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}
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if (handled)
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aKeyEvent->PreventDefault();
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}
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return NS_OK;
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}
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nsresult nsXBLWindowKeyHandler::KeyUp(nsIDOMEvent* aKeyEvent)
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{
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return WalkHandlers(aKeyEvent, nsXBLAtoms::keyup);
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}
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nsresult nsXBLWindowKeyHandler::KeyDown(nsIDOMEvent* aKeyEvent)
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{
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return WalkHandlers(aKeyEvent, nsXBLAtoms::keydown);
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}
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nsresult nsXBLWindowKeyHandler::KeyPress(nsIDOMEvent* aKeyEvent)
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{
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return WalkHandlers(aKeyEvent, nsXBLAtoms::keypress);
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}
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//
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// EventMatched
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//
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// See if the given handler cares about this particular key event
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//
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PRBool
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nsXBLWindowKeyHandler::EventMatched(nsXBLPrototypeHandler* inHandler,
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nsIAtom* inEventType, nsIDOMEvent* inEvent)
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{
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nsCOMPtr<nsIDOMKeyEvent> keyEvent(do_QueryInterface(inEvent));
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if (keyEvent)
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return inHandler->KeyEventMatched(inEventType, keyEvent);
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return PR_FALSE;
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}
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/* static */ void
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nsXBLWindowKeyHandler::ShutDown()
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{
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NS_IF_RELEASE(sNativeEditorBindings);
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}
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///////////////////////////////////////////////////////////////////////////////////
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nsresult
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NS_NewXBLWindowKeyHandler(nsIDOMElement* aElement, nsIDOMEventReceiver* aReceiver, nsXBLWindowKeyHandler** aResult)
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{
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*aResult = new nsXBLWindowKeyHandler(aElement, aReceiver);
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if (!*aResult)
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return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(*aResult);
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return NS_OK;
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}
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