LCOV - code coverage report
Current view: directory - js/xpconnect/wrappers - WrapperFactory.h (source / functions) Found Hit Coverage
Test: app.info Lines: 12 6 50.0 %
Date: 2012-06-02 Functions: 5 2 40.0 %

       1                 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
       2                 :  * vim: set ts=4 sw=4 et tw=99 ft=cpp:
       3                 :  *
       4                 :  * ***** BEGIN LICENSE BLOCK *****
       5                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       6                 :  *
       7                 :  * The contents of this file are subject to the Mozilla Public License Version
       8                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       9                 :  * the License. You may obtain a copy of the License at
      10                 :  * http://www.mozilla.org/MPL/
      11                 :  *
      12                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      13                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      14                 :  * for the specific language governing rights and limitations under the
      15                 :  * License.
      16                 :  *
      17                 :  * The Original Code is mozilla.org code, released
      18                 :  * June 24, 2010.
      19                 :  *
      20                 :  * The Initial Developer of the Original Code is
      21                 :  *    The Mozilla Foundation
      22                 :  *
      23                 :  * Contributor(s):
      24                 :  *    Andreas Gal <gal@mozilla.com>
      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 "jsapi.h"
      41                 : #include "jswrapper.h"
      42                 : 
      43                 : namespace xpc {
      44                 : 
      45                 : class WrapperFactory {
      46                 :   public:
      47                 :     enum { WAIVE_XRAY_WRAPPER_FLAG = js::Wrapper::LAST_USED_FLAG << 1,
      48                 :            IS_XRAY_WRAPPER_FLAG    = WAIVE_XRAY_WRAPPER_FLAG << 1,
      49                 :            SCRIPT_ACCESS_ONLY_FLAG = IS_XRAY_WRAPPER_FLAG << 1,
      50                 :            PARTIALLY_TRANSPARENT   = SCRIPT_ACCESS_ONLY_FLAG << 1,
      51                 :            SOW_FLAG                = PARTIALLY_TRANSPARENT << 1,
      52                 : 
      53                 :            // Prevent scripts from shadowing native properties.
      54                 :            // NB: Applies only to Xray wrappers.
      55                 :            // NB: This will prevent scriptable helpers from defining special
      56                 :            //     handlers for properties defined in IDL. Use with caution.
      57                 :            SHADOWING_FORBIDDEN     = SOW_FLAG << 1 };
      58                 : 
      59                 :     // Return true if any of any of the nested wrappers have the flag set.
      60         1840428 :     static bool HasWrapperFlag(JSObject *wrapper, unsigned flag) {
      61         1840428 :         unsigned flags = 0;
      62         1840428 :         js::UnwrapObject(wrapper, true, &flags);
      63         1840428 :         return !!(flags & flag);
      64                 :     }
      65                 : 
      66         1840428 :     static bool IsXrayWrapper(JSObject *wrapper) {
      67         1840428 :         return HasWrapperFlag(wrapper, IS_XRAY_WRAPPER_FLAG);
      68                 :     }
      69                 : 
      70               0 :     static bool IsPartiallyTransparent(JSObject *wrapper) {
      71               0 :         return HasWrapperFlag(wrapper, PARTIALLY_TRANSPARENT);
      72                 :     }
      73                 : 
      74               0 :     static bool HasWaiveXrayFlag(JSObject *wrapper) {
      75               0 :         return HasWrapperFlag(wrapper, WAIVE_XRAY_WRAPPER_FLAG);
      76                 :     }
      77                 : 
      78               0 :     static bool IsShadowingForbidden(JSObject *wrapper) {
      79               0 :         return HasWrapperFlag(wrapper, SHADOWING_FORBIDDEN);
      80                 :     }
      81                 : 
      82                 :     static JSObject *WaiveXray(JSContext *cx, JSObject *obj);
      83                 : 
      84                 :     static JSObject *DoubleWrap(JSContext *cx, JSObject *obj, unsigned flags);
      85                 : 
      86                 :     // Prepare a given object for wrapping in a new compartment.
      87                 :     static JSObject *PrepareForWrapping(JSContext *cx,
      88                 :                                         JSObject *scope,
      89                 :                                         JSObject *obj,
      90                 :                                         unsigned flags);
      91                 : 
      92                 :     // Rewrap an object that is about to cross compartment boundaries.
      93                 :     static JSObject *Rewrap(JSContext *cx,
      94                 :                             JSObject *obj,
      95                 :                             JSObject *wrappedProto,
      96                 :                             JSObject *parent,
      97                 :                             unsigned flags);
      98                 : 
      99                 :     // Return true if this is a location object.
     100                 :     static bool IsLocationObject(JSObject *obj);
     101                 : 
     102                 :     // Wrap a location object.
     103                 :     static JSObject *WrapLocationObject(JSContext *cx, JSObject *obj);
     104                 : 
     105                 :     // Wrap wrapped object into a waiver wrapper and then re-wrap it.
     106                 :     static bool WaiveXrayAndWrap(JSContext *cx, jsval *vp);
     107                 : 
     108                 :     // Wrap a (same compartment) object in a SOW.
     109                 :     static JSObject *WrapSOWObject(JSContext *cx, JSObject *obj);
     110                 : };
     111                 : 
     112                 : extern js::Wrapper WaiveXrayWrapperWrapper;
     113                 : 
     114                 : }

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