LCOV - code coverage report
Current view: directory - layout/printing - nsPrintPreviewListener.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 79 0 0.0 %
Date: 2012-06-02 Functions: 8 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
       2                 :  *
       3                 :  * ***** BEGIN LICENSE BLOCK *****
       4                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       5                 :  *
       6                 :  * The contents of this file are subject to the Mozilla Public License Version
       7                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       8                 :  * the License. You may obtain a copy of the License at
       9                 :  * http://www.mozilla.org/MPL/
      10                 :  *
      11                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      12                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      13                 :  * for the specific language governing rights and limitations under the
      14                 :  * License.
      15                 :  *
      16                 :  * The Original Code is the Mozilla browser.
      17                 :  *
      18                 :  * The Initial Developer of the Original Code is
      19                 :  * Netscape Communications, Inc.
      20                 :  * Portions created by the Initial Developer are Copyright (C) 1999
      21                 :  * the Initial Developer. All Rights Reserved.
      22                 :  *
      23                 :  * Contributor(s):
      24                 :  *   Mats Palmgren <mats.palmgren@bredband.net>
      25                 :  *
      26                 :  * Alternatively, the contents of this file may be used under the terms of
      27                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      28                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      29                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      30                 :  * of those above. If you wish to allow use of your version of this file only
      31                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      32                 :  * use your version of this file under the terms of the MPL, indicate your
      33                 :  * decision by deleting the provisions above and replace them with the notice
      34                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      35                 :  * the provisions above, a recipient may use your version of this file under
      36                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      37                 :  *
      38                 :  * ***** END LICENSE BLOCK ***** */
      39                 : 
      40                 : #include "nsPrintPreviewListener.h"
      41                 : 
      42                 : #include "mozilla/dom/Element.h"
      43                 : #include "nsIDOMWindow.h"
      44                 : #include "nsPIDOMWindow.h"
      45                 : #include "nsIDOMElement.h"
      46                 : #include "nsIDOMKeyEvent.h"
      47                 : #include "nsIDOMNSEvent.h"
      48                 : #include "nsIDocument.h"
      49                 : #include "nsIDocShell.h"
      50                 : #include "nsPresContext.h"
      51                 : #include "nsFocusManager.h"
      52                 : #include "nsLiteralString.h"
      53                 : 
      54                 : using namespace mozilla;
      55                 : 
      56               0 : NS_IMPL_ISUPPORTS1(nsPrintPreviewListener, nsIDOMEventListener)
      57                 : 
      58                 : 
      59                 : //
      60                 : // nsPrintPreviewListener ctor
      61                 : //
      62               0 : nsPrintPreviewListener::nsPrintPreviewListener (nsIDOMEventTarget* aTarget)
      63               0 :   : mEventTarget(aTarget)
      64                 : {
      65               0 :   NS_ADDREF_THIS();
      66               0 : } // ctor
      67                 : 
      68                 : 
      69                 : //-------------------------------------------------------
      70                 : //
      71                 : // AddListeners
      72                 : //
      73                 : // Subscribe to the events that will allow us to track various events. 
      74                 : //
      75                 : nsresult
      76               0 : nsPrintPreviewListener::AddListeners()
      77                 : {
      78               0 :   if (mEventTarget) {
      79               0 :     mEventTarget->AddEventListener(NS_LITERAL_STRING("click"), this, true);
      80               0 :     mEventTarget->AddEventListener(NS_LITERAL_STRING("contextmenu"), this, true);
      81               0 :     mEventTarget->AddEventListener(NS_LITERAL_STRING("keydown"), this, true);
      82               0 :     mEventTarget->AddEventListener(NS_LITERAL_STRING("keypress"), this, true);
      83               0 :     mEventTarget->AddEventListener(NS_LITERAL_STRING("keyup"), this, true);
      84               0 :     mEventTarget->AddEventListener(NS_LITERAL_STRING("mousedown"), this, true);
      85               0 :     mEventTarget->AddEventListener(NS_LITERAL_STRING("mousemove"), this, true);
      86               0 :     mEventTarget->AddEventListener(NS_LITERAL_STRING("mouseout"), this, true);
      87               0 :     mEventTarget->AddEventListener(NS_LITERAL_STRING("mouseover"), this, true);
      88               0 :     mEventTarget->AddEventListener(NS_LITERAL_STRING("mouseup"), this, true);
      89                 :   }
      90                 : 
      91               0 :   return NS_OK;
      92                 : }
      93                 : 
      94                 : 
      95                 : //-------------------------------------------------------
      96                 : //
      97                 : // RemoveListeners
      98                 : //
      99                 : // Unsubscribe from all the various events that we were listening to. 
     100                 : //
     101                 : nsresult 
     102               0 : nsPrintPreviewListener::RemoveListeners()
     103                 : {
     104               0 :   if (mEventTarget) {
     105               0 :     mEventTarget->RemoveEventListener(NS_LITERAL_STRING("click"), this, true);
     106               0 :     mEventTarget->RemoveEventListener(NS_LITERAL_STRING("contextmenu"), this, true);
     107               0 :     mEventTarget->RemoveEventListener(NS_LITERAL_STRING("keydown"), this, true);
     108               0 :     mEventTarget->RemoveEventListener(NS_LITERAL_STRING("keypress"), this, true);
     109               0 :     mEventTarget->RemoveEventListener(NS_LITERAL_STRING("keyup"), this, true);
     110               0 :     mEventTarget->RemoveEventListener(NS_LITERAL_STRING("mousedown"), this, true);
     111               0 :     mEventTarget->RemoveEventListener(NS_LITERAL_STRING("mousemove"), this, true);
     112               0 :     mEventTarget->RemoveEventListener(NS_LITERAL_STRING("mouseout"), this, true);
     113               0 :     mEventTarget->RemoveEventListener(NS_LITERAL_STRING("mouseover"), this, true);
     114               0 :     mEventTarget->RemoveEventListener(NS_LITERAL_STRING("mouseup"), this, true);
     115                 :   }
     116                 : 
     117               0 :   return NS_OK;
     118                 : }
     119                 : 
     120                 : //-------------------------------------------------------
     121                 : //
     122                 : // GetActionForEvent
     123                 : //
     124                 : // Helper function to let certain key events through
     125                 : //
     126                 : enum eEventAction {
     127                 :   eEventAction_Tab,       eEventAction_ShiftTab,
     128                 :   eEventAction_Propagate, eEventAction_Suppress
     129                 : };
     130                 : 
     131                 : static eEventAction
     132               0 : GetActionForEvent(nsIDOMEvent* aEvent)
     133                 : {
     134                 :   static const PRUint32 kOKKeyCodes[] = {
     135                 :     nsIDOMKeyEvent::DOM_VK_PAGE_UP, nsIDOMKeyEvent::DOM_VK_PAGE_DOWN,
     136                 :     nsIDOMKeyEvent::DOM_VK_UP,      nsIDOMKeyEvent::DOM_VK_DOWN, 
     137                 :     nsIDOMKeyEvent::DOM_VK_HOME,    nsIDOMKeyEvent::DOM_VK_END 
     138                 :   };
     139                 : 
     140               0 :   nsCOMPtr<nsIDOMKeyEvent> keyEvent(do_QueryInterface(aEvent));
     141               0 :   if (keyEvent) {
     142                 :     bool b;
     143               0 :     keyEvent->GetAltKey(&b);
     144               0 :     if (b) return eEventAction_Suppress;
     145               0 :     keyEvent->GetCtrlKey(&b);
     146               0 :     if (b) return eEventAction_Suppress;
     147                 : 
     148               0 :     keyEvent->GetShiftKey(&b);
     149                 : 
     150                 :     PRUint32 keyCode;
     151               0 :     keyEvent->GetKeyCode(&keyCode);
     152               0 :     if (keyCode == nsIDOMKeyEvent::DOM_VK_TAB)
     153               0 :       return b ? eEventAction_ShiftTab : eEventAction_Tab;
     154                 : 
     155                 :     PRUint32 charCode;
     156               0 :     keyEvent->GetCharCode(&charCode);
     157               0 :     if (charCode == ' ' || keyCode == nsIDOMKeyEvent::DOM_VK_SPACE)
     158               0 :       return eEventAction_Propagate;
     159                 : 
     160               0 :     if (b) return eEventAction_Suppress;
     161                 : 
     162               0 :     for (PRUint32 i = 0; i < sizeof(kOKKeyCodes)/sizeof(kOKKeyCodes[0]); ++i) {
     163               0 :       if (keyCode == kOKKeyCodes[i]) {
     164               0 :         return eEventAction_Propagate;
     165                 :       }
     166                 :     }
     167                 :   }
     168               0 :   return eEventAction_Suppress;
     169                 : }
     170                 : 
     171                 : NS_IMETHODIMP
     172               0 : nsPrintPreviewListener::HandleEvent(nsIDOMEvent* aEvent)
     173                 : {
     174               0 :   nsCOMPtr<nsIDOMEventTarget> target;
     175               0 :   nsCOMPtr<nsIDOMNSEvent> nsEvent = do_QueryInterface(aEvent);
     176               0 :   if (nsEvent)
     177               0 :     nsEvent->GetOriginalTarget(getter_AddRefs(target));
     178               0 :   nsCOMPtr<nsIContent> content(do_QueryInterface(target));
     179               0 :   if (content && !content->IsXUL()) {
     180               0 :     eEventAction action = ::GetActionForEvent(aEvent);
     181               0 :     switch (action) {
     182                 :       case eEventAction_Tab:
     183                 :       case eEventAction_ShiftTab:
     184                 :       {
     185               0 :         nsAutoString eventString;
     186               0 :         aEvent->GetType(eventString);
     187               0 :         if (eventString == NS_LITERAL_STRING("keydown")) {
     188                 :           // Handle tabbing explicitly here since we don't want focus ending up
     189                 :           // inside the content document, bug 244128.
     190               0 :           nsIDocument* doc = content->GetCurrentDoc();
     191               0 :           NS_ASSERTION(doc, "no document");
     192                 : 
     193               0 :           nsIDocument* parentDoc = doc->GetParentDocument();
     194               0 :           NS_ASSERTION(parentDoc, "no parent document");
     195                 : 
     196               0 :           nsCOMPtr<nsIDOMWindow> win = do_QueryInterface(parentDoc->GetWindow());
     197                 : 
     198               0 :           nsIFocusManager* fm = nsFocusManager::GetFocusManager();
     199               0 :           if (fm && win) {
     200               0 :             dom::Element* fromElement = parentDoc->FindContentForSubDocument(doc);
     201               0 :             nsCOMPtr<nsIDOMElement> from = do_QueryInterface(fromElement);
     202                 : 
     203               0 :             bool forward = (action == eEventAction_Tab);
     204               0 :             nsCOMPtr<nsIDOMElement> result;
     205                 :             fm->MoveFocus(win, from,
     206                 :                           forward ? nsIFocusManager::MOVEFOCUS_FORWARD :
     207                 :                                     nsIFocusManager::MOVEFOCUS_BACKWARD,
     208               0 :                           nsIFocusManager::FLAG_BYKEY, getter_AddRefs(result));
     209                 :           }
     210                 :         }
     211                 :       }
     212                 :       // fall-through
     213                 :       case eEventAction_Suppress:
     214               0 :         aEvent->StopPropagation();
     215               0 :         aEvent->PreventDefault();
     216               0 :         break;
     217                 :       case eEventAction_Propagate:
     218                 :         // intentionally empty
     219               0 :         break;
     220                 :     }
     221                 :   }
     222               0 :   return NS_OK; 
     223                 : }

Generated by: LCOV version 1.7