LCOV - code coverage report
Current view: directory - content/events/src - nsEventListenerService.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 140 2 1.4 %
Date: 2012-06-02 Functions: 24 2 8.3 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is mozilla.org code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is Mozilla Foundation.
      18                 :  * Portions created by the Initial Developer are Copyright (C) 2009
      19                 :  * the Initial Developer. All Rights Reserved.
      20                 :  *
      21                 :  * Contributor(s):
      22                 :  *   Olli Pettay <Olli.Pettay@helsinki.fi> (Original Author)
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      26                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : #include "nsEventListenerService.h"
      38                 : #include "nsCOMArray.h"
      39                 : #include "nsEventListenerManager.h"
      40                 : #include "nsIVariant.h"
      41                 : #include "nsIServiceManager.h"
      42                 : #include "nsMemory.h"
      43                 : #include "nsContentUtils.h"
      44                 : #include "nsIXPConnect.h"
      45                 : #include "nsIDOMWindow.h"
      46                 : #include "nsPIDOMWindow.h"
      47                 : #include "nsJSUtils.h"
      48                 : #include "nsIPrivateDOMEvent.h"
      49                 : #include "nsIJSContextStack.h"
      50                 : #include "nsGUIEvent.h"
      51                 : #include "nsEventDispatcher.h"
      52                 : #include "nsIJSEventListener.h"
      53                 : #ifdef MOZ_JSDEBUGGER
      54                 : #include "jsdIDebuggerService.h"
      55                 : #endif
      56                 : 
      57            1464 : NS_IMPL_CYCLE_COLLECTION_1(nsEventListenerInfo, mListener)
      58                 : 
      59                 : DOMCI_DATA(EventListenerInfo, nsEventListenerInfo)
      60                 : 
      61               0 : NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsEventListenerInfo)
      62               0 :   NS_INTERFACE_MAP_ENTRY(nsIEventListenerInfo)
      63               0 :   NS_INTERFACE_MAP_ENTRY(nsISupports)
      64               0 :   NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(EventListenerInfo)
      65               0 : NS_INTERFACE_MAP_END
      66                 : 
      67               0 : NS_IMPL_CYCLE_COLLECTING_ADDREF(nsEventListenerInfo)
      68               0 : NS_IMPL_CYCLE_COLLECTING_RELEASE(nsEventListenerInfo)
      69                 : 
      70                 : NS_IMETHODIMP
      71               0 : nsEventListenerInfo::GetType(nsAString& aType)
      72                 : {
      73               0 :   aType = mType;
      74               0 :   return NS_OK;
      75                 : }
      76                 : 
      77                 : NS_IMETHODIMP
      78               0 : nsEventListenerInfo::GetCapturing(bool* aCapturing)
      79                 : {
      80               0 :   *aCapturing = mCapturing;
      81               0 :   return NS_OK;
      82                 : }
      83                 : 
      84                 : NS_IMETHODIMP
      85               0 : nsEventListenerInfo::GetAllowsUntrusted(bool* aAllowsUntrusted)
      86                 : {
      87               0 :   *aAllowsUntrusted = mAllowsUntrusted;
      88               0 :   return NS_OK;
      89                 : }
      90                 : 
      91                 : NS_IMETHODIMP
      92               0 : nsEventListenerInfo::GetInSystemEventGroup(bool* aInSystemEventGroup)
      93                 : {
      94               0 :   *aInSystemEventGroup = mInSystemEventGroup;
      95               0 :   return NS_OK;
      96                 : }
      97                 : 
      98               0 : NS_IMPL_ISUPPORTS1(nsEventListenerService, nsIEventListenerService)
      99                 : 
     100                 : // Caller must root *aJSVal!
     101                 : bool
     102               0 : nsEventListenerInfo::GetJSVal(JSContext* aCx, JSAutoEnterCompartment& aAc, jsval* aJSVal)
     103                 : {
     104               0 :   *aJSVal = JSVAL_NULL;
     105               0 :   nsCOMPtr<nsIXPConnectWrappedJS> wrappedJS = do_QueryInterface(mListener);
     106               0 :   if (wrappedJS) {
     107               0 :     JSObject* object = nsnull;
     108               0 :     if (NS_FAILED(wrappedJS->GetJSObject(&object)) || !aAc.enter(aCx, object)) {
     109               0 :       return false;
     110                 :     }
     111               0 :     *aJSVal = OBJECT_TO_JSVAL(object);
     112               0 :     return true;
     113                 :   }
     114                 : 
     115               0 :   nsCOMPtr<nsIJSEventListener> jsl = do_QueryInterface(mListener);
     116               0 :   if (jsl) {
     117               0 :     JSObject *handler = jsl->GetHandler();
     118               0 :     if (handler) {
     119               0 :       if (!aAc.enter(aCx, handler)) {
     120               0 :         return false;
     121                 :       }
     122               0 :       *aJSVal = OBJECT_TO_JSVAL(handler);
     123               0 :       return true;
     124                 :     }
     125                 :   }
     126               0 :   return false;
     127                 : }
     128                 : 
     129                 : NS_IMETHODIMP
     130               0 : nsEventListenerInfo::ToSource(nsAString& aResult)
     131                 : {
     132               0 :   aResult.SetIsVoid(true);
     133                 : 
     134                 :   nsCOMPtr<nsIThreadJSContextStack> stack =
     135               0 :     nsContentUtils::ThreadJSContextStack();
     136               0 :   if (stack) {
     137               0 :     JSContext* cx = nsnull;
     138               0 :     stack->GetSafeJSContext(&cx);
     139               0 :     if (cx && NS_SUCCEEDED(stack->Push(cx))) {
     140                 :       {
     141                 :         // Extra block to finish the auto request before calling pop
     142               0 :         JSAutoRequest ar(cx);
     143               0 :         JSAutoEnterCompartment ac;
     144               0 :         jsval v = JSVAL_NULL;
     145               0 :         if (GetJSVal(cx, ac, &v)) {
     146               0 :           JSString* str = JS_ValueToSource(cx, v);
     147               0 :           if (str) {
     148               0 :             nsDependentJSString depStr;
     149               0 :             if (depStr.init(cx, str)) {
     150               0 :               aResult.Assign(depStr);
     151                 :             }
     152                 :           }
     153                 :         }
     154                 :       }
     155               0 :       stack->Pop(&cx);
     156                 :     }
     157                 :   }
     158                 :   
     159               0 :   return NS_OK;
     160                 : }
     161                 : 
     162                 : NS_IMETHODIMP
     163               0 : nsEventListenerInfo::GetDebugObject(nsISupports** aRetVal)
     164                 : {
     165               0 :   *aRetVal = nsnull;
     166                 : 
     167                 : #ifdef MOZ_JSDEBUGGER
     168               0 :   nsresult rv = NS_OK;
     169                 :   nsCOMPtr<jsdIDebuggerService> jsd =
     170               0 :     do_GetService("@mozilla.org/js/jsd/debugger-service;1", &rv);
     171               0 :   NS_ENSURE_SUCCESS(rv, NS_OK);
     172                 :   
     173               0 :   bool isOn = false;
     174               0 :   jsd->GetIsOn(&isOn);
     175               0 :   NS_ENSURE_TRUE(isOn, NS_OK);
     176                 : 
     177                 :   nsCOMPtr<nsIThreadJSContextStack> stack =
     178               0 :     nsContentUtils::ThreadJSContextStack();
     179               0 :   if (stack) {
     180               0 :     JSContext* cx = nsnull;
     181               0 :     stack->GetSafeJSContext(&cx);
     182               0 :     if (cx && NS_SUCCEEDED(stack->Push(cx))) {
     183                 :       {
     184                 :         // Extra block to finish the auto request before calling pop
     185               0 :         JSAutoRequest ar(cx);
     186               0 :         JSAutoEnterCompartment ac;
     187               0 :         jsval v = JSVAL_NULL;
     188               0 :         if (GetJSVal(cx, ac, &v)) {
     189               0 :           nsCOMPtr<jsdIValue> jsdValue;
     190               0 :           rv = jsd->WrapValue(v, getter_AddRefs(jsdValue));
     191               0 :           NS_ENSURE_SUCCESS(rv, rv);
     192               0 :           jsdValue.forget(aRetVal);
     193                 :         }
     194                 :       }
     195               0 :       stack->Pop(&cx);
     196                 :     }
     197                 :   }
     198                 : #endif
     199                 : 
     200               0 :   return NS_OK;
     201                 : }
     202                 : 
     203                 : NS_IMETHODIMP
     204               0 : nsEventListenerService::GetListenerInfoFor(nsIDOMEventTarget* aEventTarget,
     205                 :                                            PRUint32* aCount,
     206                 :                                            nsIEventListenerInfo*** aOutArray)
     207                 : {
     208               0 :   NS_ENSURE_ARG_POINTER(aEventTarget);
     209               0 :   *aCount = 0;
     210               0 :   *aOutArray = nsnull;
     211               0 :   nsCOMArray<nsIEventListenerInfo> listenerInfos;
     212                 :   nsEventListenerManager* elm =
     213               0 :     aEventTarget->GetListenerManager(false);
     214               0 :   if (elm) {
     215               0 :     elm->GetListenerInfo(&listenerInfos);
     216                 :   }
     217                 : 
     218               0 :   PRInt32 count = listenerInfos.Count();
     219               0 :   if (count == 0) {
     220               0 :     return NS_OK;
     221                 :   }
     222                 : 
     223                 :   *aOutArray =
     224                 :     static_cast<nsIEventListenerInfo**>(
     225               0 :       nsMemory::Alloc(sizeof(nsIEventListenerInfo*) * count));
     226               0 :   NS_ENSURE_TRUE(*aOutArray, NS_ERROR_OUT_OF_MEMORY);
     227                 : 
     228               0 :   for (PRInt32 i = 0; i < count; ++i) {
     229               0 :     NS_ADDREF((*aOutArray)[i] = listenerInfos[i]);
     230                 :   }
     231               0 :   *aCount = count;
     232               0 :   return NS_OK;
     233                 : }
     234                 : 
     235                 : NS_IMETHODIMP
     236               0 : nsEventListenerService::GetEventTargetChainFor(nsIDOMEventTarget* aEventTarget,
     237                 :                                                PRUint32* aCount,
     238                 :                                                nsIDOMEventTarget*** aOutArray)
     239                 : {
     240               0 :   *aCount = 0;
     241               0 :   *aOutArray = nsnull;
     242               0 :   NS_ENSURE_ARG(aEventTarget);
     243               0 :   nsEvent event(true, NS_EVENT_TYPE_NULL);
     244               0 :   nsCOMArray<nsIDOMEventTarget> targets;
     245                 :   nsresult rv = nsEventDispatcher::Dispatch(aEventTarget, nsnull, &event,
     246               0 :                                             nsnull, nsnull, nsnull, &targets);
     247               0 :   NS_ENSURE_SUCCESS(rv, rv);
     248               0 :   PRInt32 count = targets.Count();
     249               0 :   if (count == 0) {
     250               0 :     return NS_OK;
     251                 :   }
     252                 : 
     253                 :   *aOutArray =
     254                 :     static_cast<nsIDOMEventTarget**>(
     255               0 :       nsMemory::Alloc(sizeof(nsIDOMEventTarget*) * count));
     256               0 :   NS_ENSURE_TRUE(*aOutArray, NS_ERROR_OUT_OF_MEMORY);
     257                 : 
     258               0 :   for (PRInt32 i = 0; i < count; ++i) {
     259               0 :     NS_ADDREF((*aOutArray)[i] = targets[i]);
     260                 :   }
     261               0 :   *aCount = count;
     262                 : 
     263               0 :   return NS_OK;
     264                 : }
     265                 : 
     266                 : NS_IMETHODIMP
     267               0 : nsEventListenerService::HasListenersFor(nsIDOMEventTarget* aEventTarget,
     268                 :                                         const nsAString& aType,
     269                 :                                         bool* aRetVal)
     270                 : {
     271               0 :   nsEventListenerManager* elm = aEventTarget->GetListenerManager(false);
     272               0 :   *aRetVal = elm && elm->HasListenersFor(aType);
     273               0 :   return NS_OK;
     274                 : }
     275                 : 
     276                 : NS_IMETHODIMP
     277               0 : nsEventListenerService::AddSystemEventListener(nsIDOMEventTarget *aTarget,
     278                 :                                                const nsAString& aType,
     279                 :                                                nsIDOMEventListener* aListener,
     280                 :                                                bool aUseCapture)
     281                 : {
     282               0 :   NS_PRECONDITION(aTarget, "Missing target");
     283               0 :   NS_PRECONDITION(aListener, "Missing listener");
     284                 : 
     285               0 :   nsEventListenerManager* manager = aTarget->GetListenerManager(true);
     286               0 :   NS_ENSURE_STATE(manager);
     287                 : 
     288                 :   PRInt32 flags = aUseCapture ? NS_EVENT_FLAG_CAPTURE |
     289                 :                                 NS_EVENT_FLAG_SYSTEM_EVENT :
     290                 :                                 NS_EVENT_FLAG_BUBBLE |
     291               0 :                                 NS_EVENT_FLAG_SYSTEM_EVENT;
     292               0 :   manager->AddEventListenerByType(aListener, aType, flags);
     293               0 :   return NS_OK;
     294                 : }
     295                 : 
     296                 : NS_IMETHODIMP
     297               0 : nsEventListenerService::RemoveSystemEventListener(nsIDOMEventTarget *aTarget,
     298                 :                                                   const nsAString& aType,
     299                 :                                                   nsIDOMEventListener* aListener,
     300                 :                                                   bool aUseCapture)
     301                 : {
     302               0 :   NS_PRECONDITION(aTarget, "Missing target");
     303               0 :   NS_PRECONDITION(aListener, "Missing listener");
     304                 : 
     305               0 :   nsEventListenerManager* manager = aTarget->GetListenerManager(false);
     306               0 :   if (manager) {
     307                 :     PRInt32 flags = aUseCapture ? NS_EVENT_FLAG_CAPTURE |
     308                 :                                   NS_EVENT_FLAG_SYSTEM_EVENT :
     309                 :                                   NS_EVENT_FLAG_BUBBLE |
     310               0 :                                   NS_EVENT_FLAG_SYSTEM_EVENT;
     311               0 :     manager->RemoveEventListenerByType(aListener, aType, flags);
     312                 :   }
     313                 : 
     314               0 :   return NS_OK;
     315                 : }
     316                 : 
     317                 : nsresult
     318               0 : NS_NewEventListenerService(nsIEventListenerService** aResult)
     319                 : {
     320               0 :   *aResult = new nsEventListenerService();
     321               0 :   NS_ENSURE_TRUE(*aResult, NS_ERROR_OUT_OF_MEMORY);
     322               0 :   NS_ADDREF(*aResult);
     323               0 :   return NS_OK;
     324            4392 : }

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