LCOV - code coverage report
Current view: directory - content/xbl/src - nsXBLService.h (source / functions) Found Hit Coverage
Test: app.info Lines: 3 0 0.0 %
Date: 2012-06-02 Functions: 3 0 0.0 %

       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 Communicator client code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * Netscape Communications Corporation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 1998
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *   Original Author: David W. Hyatt (hyatt@netscape.com)
      24                 :  *   - Brendan Eich (brendan@mozilla.org)
      25                 :  *   - Mike Pinkerton (pinkerton@netscape.com)
      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                 : 
      43                 : #include "nsIXBLService.h"
      44                 : #include "nsIObserver.h"
      45                 : #include "nsWeakReference.h"
      46                 : #include "jsapi.h"              // nsXBLJSClass derives from JSClass
      47                 : #include "jsclist.h"            // nsXBLJSClass derives from JSCList
      48                 : #include "nsFixedSizeAllocator.h"
      49                 : #include "nsTArray.h"
      50                 : 
      51                 : class nsXBLBinding;
      52                 : class nsXBLDocumentInfo;
      53                 : class nsIContent;
      54                 : class nsIDocument;
      55                 : class nsIAtom;
      56                 : class nsString;
      57                 : class nsIURI;
      58                 : class nsSupportsHashtable;
      59                 : class nsHashtable;
      60                 : 
      61                 : class nsXBLService : public nsIXBLService,
      62                 :                      public nsIObserver,
      63                 :                      public nsSupportsWeakReference
      64                 : {
      65                 :   NS_DECL_ISUPPORTS
      66                 : 
      67                 :   static bool IsChromeOrResourceURI(nsIURI* aURI);
      68                 : 
      69                 :   // This function loads a particular XBL file and installs all of the bindings
      70                 :   // onto the element.  aOriginPrincipal must not be null here.
      71                 :   NS_IMETHOD LoadBindings(nsIContent* aContent, nsIURI* aURL,
      72                 :                           nsIPrincipal* aOriginPrincipal, bool aAugmentFlag,
      73                 :                           nsXBLBinding** aBinding, bool* aResolveStyle);
      74                 : 
      75                 :   // Indicates whether or not a binding is fully loaded.
      76                 :   NS_IMETHOD BindingReady(nsIContent* aBoundElement, nsIURI* aURI, bool* aIsReady);
      77                 : 
      78                 :   // Gets the object's base class type.
      79                 :   NS_IMETHOD ResolveTag(nsIContent* aContent, PRInt32* aNameSpaceID, nsIAtom** aResult);
      80                 : 
      81                 :   // This method checks the hashtable and then calls FetchBindingDocument on a
      82                 :   // miss.  aOriginPrincipal or aBoundDocument may be null to bypass security
      83                 :   // checks.
      84                 :   NS_IMETHOD LoadBindingDocumentInfo(nsIContent* aBoundElement,
      85                 :                                      nsIDocument* aBoundDocument,
      86                 :                                      nsIURI* aBindingURI,
      87                 :                                      nsIPrincipal* aOriginPrincipal,
      88                 :                                      bool aForceSyncLoad,
      89                 :                                      nsXBLDocumentInfo** aResult);
      90                 : 
      91                 :   // Used by XUL key bindings and for window XBL.
      92                 :   NS_IMETHOD AttachGlobalKeyHandler(nsIDOMEventTarget* aTarget);
      93                 :   NS_IMETHOD DetachGlobalKeyHandler(nsIDOMEventTarget* aTarget);
      94                 : 
      95                 :   NS_DECL_NSIOBSERVER
      96                 : 
      97                 : public:
      98                 :   nsXBLService();
      99                 :   virtual ~nsXBLService();
     100                 : 
     101                 : protected:
     102                 :   // This function clears out the bindings on a given content node.
     103                 :   nsresult FlushStyleBindings(nsIContent* aContent);
     104                 : 
     105                 :   // Release any memory that we can
     106                 :   nsresult FlushMemory();
     107                 :   
     108                 :   // This method synchronously loads and parses an XBL file.
     109                 :   nsresult FetchBindingDocument(nsIContent* aBoundElement, nsIDocument* aBoundDocument,
     110                 :                                 nsIURI* aDocumentURI, nsIURI* aBindingURI, 
     111                 :                                 bool aForceSyncLoad, nsIDocument** aResult);
     112                 : 
     113                 :   /**
     114                 :    * This method calls the one below with an empty |aDontExtendURIs| array.
     115                 :    */
     116                 :   nsresult GetBinding(nsIContent* aBoundElement, nsIURI* aURI,
     117                 :                       bool aPeekFlag, nsIPrincipal* aOriginPrincipal,
     118                 :                       bool* aIsReady, nsXBLBinding** aResult);
     119                 : 
     120                 :   /**
     121                 :    * This method loads a binding doc and then builds the specific binding
     122                 :    * required. It can also peek without building.
     123                 :    * @param aBoundElement the element to get a binding for
     124                 :    * @param aURI the binding URI
     125                 :    * @param aPeekFlag if true then just peek to see if the binding is ready
     126                 :    * @param aIsReady [out] if the binding is ready or not
     127                 :    * @param aResult [out] where to store the resulting binding (not used if
     128                 :    *                      aPeekFlag is true, otherwise it must be non-null)
     129                 :    * @param aDontExtendURIs a set of URIs that are already bound to this
     130                 :    *        element. If a binding extends any of these then further loading
     131                 :    *        is aborted (because it would lead to the binding extending itself)
     132                 :    *        and NS_ERROR_ILLEGAL_VALUE is returned.
     133                 :    *
     134                 :    * @note This method always calls LoadBindingDocumentInfo(), so it's
     135                 :    *       enough to funnel all security checks through that function.
     136                 :    */
     137                 :   nsresult GetBinding(nsIContent* aBoundElement, nsIURI* aURI,
     138                 :                       bool aPeekFlag, nsIPrincipal* aOriginPrincipal,
     139                 :                       bool* aIsReady, nsXBLBinding** aResult,
     140                 :                       nsTArray<nsIURI*>& aDontExtendURIs);
     141                 : 
     142                 : // MEMBER VARIABLES
     143                 : public:
     144                 :   static PRUint32 gRefCnt;                   // A count of XBLservice instances.
     145                 : 
     146                 :   static bool gDisableChromeCache;
     147                 : 
     148                 :   static nsHashtable* gClassTable;           // A table of nsXBLJSClass objects.
     149                 : 
     150                 :   static JSCList  gClassLRUList;             // LRU list of cached classes.
     151                 :   static PRUint32 gClassLRUListLength;       // Number of classes on LRU list.
     152                 :   static PRUint32 gClassLRUListQuota;        // Quota on class LRU list.
     153                 :   static bool     gAllowDataURIs;            // Whether we should allow data
     154                 :                                              // urls in -moz-binding. Needed for
     155                 :                                              // testing.
     156                 : 
     157                 :   nsFixedSizeAllocator mPool;
     158                 : };
     159                 : 
     160                 : class nsXBLJSClass : public JSCList, public JSClass
     161                 : {
     162                 : private:
     163                 :   nsrefcnt mRefCnt;
     164                 :   nsrefcnt Destroy();
     165                 : 
     166                 : public:
     167                 :   nsXBLJSClass(const nsAFlatCString& aClassName);
     168               0 :   ~nsXBLJSClass() { nsMemory::Free((void*) name); }
     169                 : 
     170               0 :   nsrefcnt Hold() { return ++mRefCnt; }
     171               0 :   nsrefcnt Drop() { return --mRefCnt ? mRefCnt : Destroy(); }
     172                 : };
     173                 : 

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