/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- * * ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is the Mozilla browser. * * The Initial Developer of the Original Code is * Netscape Communications, Inc. * Portions created by the Initial Developer are Copyright (C) 1999 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Mats Palmgren * * Alternatively, the contents of this file may be used under the terms of * either of the GNU General Public License Version 2 or later (the "GPL"), * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ #include "nsPrintPreviewListener.h" #include "nsIContent.h" #include "nsIDOMKeyEvent.h" #include "nsIDOMNSEvent.h" #include "nsIDocument.h" #include "nsIPresShell.h" #include "nsIDocShell.h" #include "nsPresContext.h" #include "nsIEventStateManager.h" #include "nsLiteralString.h" NS_IMPL_ISUPPORTS1(nsPrintPreviewListener, nsIDOMEventListener) // // nsPrintPreviewListener ctor // nsPrintPreviewListener::nsPrintPreviewListener (nsIDOMEventTarget* aTarget) : mEventTarget(aTarget) { NS_ADDREF_THIS(); } // ctor //------------------------------------------------------- // // AddListeners // // Subscribe to the events that will allow us to track various events. // nsresult nsPrintPreviewListener::AddListeners() { if (mEventTarget) { mEventTarget->AddEventListener(NS_LITERAL_STRING("click"), this, true); mEventTarget->AddEventListener(NS_LITERAL_STRING("contextmenu"), this, true); mEventTarget->AddEventListener(NS_LITERAL_STRING("keydown"), this, true); mEventTarget->AddEventListener(NS_LITERAL_STRING("keypress"), this, true); mEventTarget->AddEventListener(NS_LITERAL_STRING("keyup"), this, true); mEventTarget->AddEventListener(NS_LITERAL_STRING("mousedown"), this, true); mEventTarget->AddEventListener(NS_LITERAL_STRING("mousemove"), this, true); mEventTarget->AddEventListener(NS_LITERAL_STRING("mouseout"), this, true); mEventTarget->AddEventListener(NS_LITERAL_STRING("mouseover"), this, true); mEventTarget->AddEventListener(NS_LITERAL_STRING("mouseup"), this, true); } return NS_OK; } //------------------------------------------------------- // // RemoveListeners // // Unsubscribe from all the various events that we were listening to. // nsresult nsPrintPreviewListener::RemoveListeners() { if (mEventTarget) { mEventTarget->RemoveEventListener(NS_LITERAL_STRING("click"), this, true); mEventTarget->RemoveEventListener(NS_LITERAL_STRING("contextmenu"), this, true); mEventTarget->RemoveEventListener(NS_LITERAL_STRING("keydown"), this, true); mEventTarget->RemoveEventListener(NS_LITERAL_STRING("keypress"), this, true); mEventTarget->RemoveEventListener(NS_LITERAL_STRING("keyup"), this, true); mEventTarget->RemoveEventListener(NS_LITERAL_STRING("mousedown"), this, true); mEventTarget->RemoveEventListener(NS_LITERAL_STRING("mousemove"), this, true); mEventTarget->RemoveEventListener(NS_LITERAL_STRING("mouseout"), this, true); mEventTarget->RemoveEventListener(NS_LITERAL_STRING("mouseover"), this, true); mEventTarget->RemoveEventListener(NS_LITERAL_STRING("mouseup"), this, true); } return NS_OK; } //------------------------------------------------------- // // GetActionForEvent // // Helper function to let certain key events through // enum eEventAction { eEventAction_Tab, eEventAction_ShiftTab, eEventAction_Propagate, eEventAction_Suppress }; static eEventAction GetActionForEvent(nsIDOMEvent* aEvent) { static const PRUint32 kOKKeyCodes[] = { nsIDOMKeyEvent::DOM_VK_PAGE_UP, nsIDOMKeyEvent::DOM_VK_PAGE_DOWN, nsIDOMKeyEvent::DOM_VK_UP, nsIDOMKeyEvent::DOM_VK_DOWN, nsIDOMKeyEvent::DOM_VK_HOME, nsIDOMKeyEvent::DOM_VK_END }; nsCOMPtr keyEvent(do_QueryInterface(aEvent)); if (keyEvent) { PRBool b; keyEvent->GetAltKey(&b); if (b) return eEventAction_Suppress; keyEvent->GetCtrlKey(&b); if (b) return eEventAction_Suppress; keyEvent->GetShiftKey(&b); PRUint32 keyCode; keyEvent->GetKeyCode(&keyCode); if (keyCode == nsIDOMKeyEvent::DOM_VK_TAB) return b ? eEventAction_ShiftTab : eEventAction_Tab; PRUint32 charCode; keyEvent->GetCharCode(&charCode); if (charCode == ' ' || keyCode == nsIDOMKeyEvent::DOM_VK_SPACE) return eEventAction_Propagate; if (b) return eEventAction_Suppress; for (PRUint32 i = 0; i < sizeof(kOKKeyCodes)/sizeof(kOKKeyCodes[0]); ++i) { if (keyCode == kOKKeyCodes[i]) { return eEventAction_Propagate; } } } return eEventAction_Suppress; } NS_IMETHODIMP nsPrintPreviewListener::HandleEvent(nsIDOMEvent* aEvent) { nsCOMPtr target; nsCOMPtr nsEvent = do_QueryInterface(aEvent); if (nsEvent) nsEvent->GetOriginalTarget(getter_AddRefs(target)); nsCOMPtr content(do_QueryInterface(target)); if (content && !content->IsNodeOfType(nsINode::eXUL)) { eEventAction action = ::GetActionForEvent(aEvent); switch (action) { case eEventAction_Tab: case eEventAction_ShiftTab: { nsAutoString eventString; aEvent->GetType(eventString); if (eventString == NS_LITERAL_STRING("keydown")) { // Handle tabbing explicitly here since we don't want focus ending up // inside the content document, bug 244128. nsIDocument* doc = content->GetCurrentDoc(); NS_ASSERTION(doc, "no document"); nsIDocument* parentDoc = doc->GetParentDocument(); NS_ASSERTION(parentDoc, "no parent document"); nsIEventStateManager* esm = parentDoc->GetShellAt(0)->GetPresContext()->EventStateManager(); if (esm) { esm->SetContentState(nsnull, NS_EVENT_STATE_FOCUS); PRBool forward = (action == eEventAction_Tab); esm->ShiftFocus(forward, forward ? nsnull : parentDoc->FindContentForSubDocument(doc)); } } } // fall-through case eEventAction_Suppress: aEvent->StopPropagation(); aEvent->PreventDefault(); break; case eEventAction_Propagate: // intentionally empty break; } } return NS_OK; }