LCOV - code coverage report
Current view: directory - dom/base - nsJSUtils.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 60 24 40.0 %
Date: 2012-06-02 Functions: 6 2 33.3 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* vim: set ts=2 sw=2 et tw=78: */
       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 mozilla.org code.
      17                 :  *
      18                 :  * The Initial Developer of the Original Code is
      19                 :  * Netscape Communications Corporation.
      20                 :  * Portions created by the Initial Developer are Copyright (C) 1998
      21                 :  * the Initial Developer. All Rights Reserved.
      22                 :  *
      23                 :  * Contributor(s):
      24                 :  *   Vidur Apparao <vidur@netscape.com>
      25                 :  *   L. David Baron <dbaron@mozillafoundation.org>
      26                 :  *
      27                 :  * Alternatively, the contents of this file may be used under the terms of
      28                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      29                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      30                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      31                 :  * of those above. If you wish to allow use of your version of this file only
      32                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      33                 :  * use your version of this file under the terms of the MPL, indicate your
      34                 :  * decision by deleting the provisions above and replace them with the notice
      35                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      36                 :  * the provisions above, a recipient may use your version of this file under
      37                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      38                 :  *
      39                 :  * ***** END LICENSE BLOCK ***** */
      40                 : 
      41                 : /**
      42                 :  * This is not a generated file. It contains common utility functions
      43                 :  * invoked from the JavaScript code generated from IDL interfaces.
      44                 :  * The goal of the utility functions is to cut down on the size of
      45                 :  * the generated code itself.
      46                 :  */
      47                 : 
      48                 : #include "nsJSUtils.h"
      49                 : #include "jsapi.h"
      50                 : #include "jsdbgapi.h"
      51                 : #include "prprf.h"
      52                 : #include "nsIScriptContext.h"
      53                 : #include "nsIScriptObjectOwner.h"
      54                 : #include "nsIScriptGlobalObject.h"
      55                 : #include "nsIServiceManager.h"
      56                 : #include "nsIXPConnect.h"
      57                 : #include "nsCOMPtr.h"
      58                 : #include "nsContentUtils.h"
      59                 : #include "nsIScriptSecurityManager.h"
      60                 : #include "nsPIDOMWindow.h"
      61                 : 
      62                 : #include "nsDOMJSUtils.h" // for GetScriptContextFromJSContext
      63                 : 
      64                 : JSBool
      65               0 : nsJSUtils::GetCallingLocation(JSContext* aContext, const char* *aFilename,
      66                 :                               PRUint32* aLineno)
      67                 : {
      68                 :   // Get the current filename and line number
      69               0 :   JSStackFrame* frame = nsnull;
      70               0 :   JSScript* script = nsnull;
      71               0 :   do {
      72               0 :     frame = ::JS_FrameIterator(aContext, &frame);
      73                 : 
      74               0 :     if (frame) {
      75               0 :       script = ::JS_GetFrameScript(aContext, frame);
      76                 :     }
      77                 :   } while (frame && !script);
      78                 : 
      79               0 :   if (script) {
      80               0 :     const char* filename = ::JS_GetScriptFilename(aContext, script);
      81                 : 
      82               0 :     if (filename) {
      83               0 :       PRUint32 lineno = 0;
      84               0 :       jsbytecode* bytecode = ::JS_GetFramePC(aContext, frame);
      85                 : 
      86               0 :       if (bytecode) {
      87               0 :         lineno = ::JS_PCToLineNumber(aContext, script, bytecode);
      88                 :       }
      89                 : 
      90               0 :       *aFilename = filename;
      91               0 :       *aLineno = lineno;
      92               0 :       return JS_TRUE;
      93                 :     }
      94                 :   }
      95                 : 
      96               0 :   return JS_FALSE;
      97                 : }
      98                 : 
      99                 : nsIScriptGlobalObject *
     100             389 : nsJSUtils::GetStaticScriptGlobal(JSContext* aContext, JSObject* aObj)
     101                 : {
     102                 :   nsISupports* supports;
     103                 :   JSClass* clazz;
     104             389 :   JSObject* glob = aObj; // starting point for search
     105                 : 
     106             389 :   if (!glob)
     107               0 :     return nsnull;
     108                 : 
     109             389 :   glob = JS_GetGlobalForObject(aContext, glob);
     110             389 :   NS_ABORT_IF_FALSE(glob, "Infallible returns null");
     111                 : 
     112             389 :   clazz = JS_GetClass(glob);
     113                 : 
     114            1556 :   if (!clazz ||
     115             389 :       !(clazz->flags & JSCLASS_HAS_PRIVATE) ||
     116             389 :       !(clazz->flags & JSCLASS_PRIVATE_IS_NSISUPPORTS) ||
     117             389 :       !(supports = (nsISupports*)::JS_GetPrivate(glob))) {
     118               0 :     return nsnull;
     119                 :   }
     120                 : 
     121                 :   // We might either have a window directly (e.g. if the global is a
     122                 :   // sandbox whose script object principal pointer is a window), or an
     123                 :   // XPCWrappedNative for a window.  We could also have other
     124                 :   // sandbox-related script object principals, but we can't do much
     125                 :   // about those short of trying to walk the proto chain of |glob|
     126                 :   // looking for a window or something.
     127             778 :   nsCOMPtr<nsIScriptGlobalObject> sgo(do_QueryInterface(supports));
     128             389 :   if (!sgo) {
     129             778 :     nsCOMPtr<nsIXPConnectWrappedNative> wrapper(do_QueryInterface(supports));
     130             389 :     NS_ENSURE_TRUE(wrapper, nsnull);
     131             778 :     sgo = do_QueryWrappedNative(wrapper);
     132                 :   }
     133                 : 
     134                 :   // We're returning a pointer to something that's about to be
     135                 :   // released, but that's ok here.
     136             389 :   return sgo;
     137                 : }
     138                 : 
     139                 : nsIScriptContext *
     140               0 : nsJSUtils::GetStaticScriptContext(JSContext* aContext, JSObject* aObj)
     141                 : {
     142               0 :   nsIScriptGlobalObject *nativeGlobal = GetStaticScriptGlobal(aContext, aObj);
     143               0 :   if (!nativeGlobal)
     144               0 :     return nsnull;
     145                 : 
     146               0 :   return nativeGlobal->GetScriptContext(nsIProgrammingLanguage::JAVASCRIPT);
     147                 : }
     148                 : 
     149                 : nsIScriptGlobalObject *
     150               0 : nsJSUtils::GetDynamicScriptGlobal(JSContext* aContext)
     151                 : {
     152               0 :   nsIScriptContext *scriptCX = GetDynamicScriptContext(aContext);
     153               0 :   if (!scriptCX)
     154               0 :     return nsnull;
     155               0 :   return scriptCX->GetGlobalObject();
     156                 : }
     157                 : 
     158                 : nsIScriptContext *
     159               0 : nsJSUtils::GetDynamicScriptContext(JSContext *aContext)
     160                 : {
     161               0 :   return GetScriptContextFromJSContext(aContext);
     162                 : }
     163                 : 
     164                 : PRUint64
     165             389 : nsJSUtils::GetCurrentlyRunningCodeInnerWindowID(JSContext *aContext)
     166                 : {
     167             389 :   if (!aContext)
     168               0 :     return 0;
     169                 : 
     170             389 :   PRUint64 innerWindowID = 0;
     171                 : 
     172             389 :   JSObject *jsGlobal = JS_GetGlobalForScopeChain(aContext);
     173             389 :   if (jsGlobal) {
     174                 :     nsIScriptGlobalObject *scriptGlobal = GetStaticScriptGlobal(aContext,
     175             389 :                                                                 jsGlobal);
     176             389 :     if (scriptGlobal) {
     177               0 :       nsCOMPtr<nsPIDOMWindow> win = do_QueryInterface(scriptGlobal);
     178               0 :       if (win)
     179               0 :         innerWindowID = win->WindowID();
     180                 :     }
     181                 :   }
     182                 : 
     183             389 :   return innerWindowID;
     184                 : }
     185                 : 

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