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       1             : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim: set ts=8 sts=2 et sw=2 tw=80: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : #ifndef nsXBLResourceLoader_h
       8             : #define nsXBLResourceLoader_h
       9             : 
      10             : #include "mozilla/Attributes.h"
      11             : #include "nsCOMPtr.h"
      12             : #include "nsICSSLoaderObserver.h"
      13             : #include "nsCOMArray.h"
      14             : #include "nsCycleCollectionParticipant.h"
      15             : 
      16             : class nsIContent;
      17             : class nsIAtom;
      18             : class nsXBLPrototypeResources;
      19             : class nsXBLPrototypeBinding;
      20             : struct nsXBLResource;
      21             : class nsIObjectOutputStream;
      22             : class nsIDocument;
      23             : 
      24             : // *********************************************************************/
      25             : // The XBLResourceLoader class
      26             : 
      27             : class nsXBLResourceLoader : public nsICSSLoaderObserver
      28             : {
      29             : public:
      30             :   NS_DECL_CYCLE_COLLECTING_ISUPPORTS
      31          60 :   NS_DECL_CYCLE_COLLECTION_CLASS(nsXBLResourceLoader)
      32             : 
      33             :   // nsICSSLoaderObserver
      34             :   NS_IMETHOD StyleSheetLoaded(mozilla::StyleSheet* aSheet,
      35             :                               bool aWasAlternate,
      36             :                               nsresult aStatus) override;
      37             : 
      38             :   bool LoadResources(nsIContent* aBoundElement);
      39             :   void AddResource(nsIAtom* aResourceType, const nsAString& aSrc);
      40             :   void AddResourceListener(nsIContent* aElement);
      41             : 
      42             :   nsXBLResourceLoader(nsXBLPrototypeBinding* aBinding,
      43             :                       nsXBLPrototypeResources* aResources);
      44             : 
      45             :   void NotifyBoundElements();
      46             : 
      47             :   nsresult Write(nsIObjectOutputStream* aStream);
      48             : 
      49             : // MEMBER VARIABLES
      50             :   nsXBLPrototypeBinding* mBinding; // A pointer back to our binding.
      51             :   nsXBLPrototypeResources* mResources; // A pointer back to our resources
      52             :                                        // information.  May be null if the
      53             :                                        // resources have already been
      54             :                                        // destroyed.
      55             : 
      56             :   nsXBLResource* mResourceList; // The list of resources we need to load.
      57             :   nsXBLResource* mLastResource;
      58             : 
      59             :   bool mLoadingResources;
      60             :   // We need mInLoadResourcesFunc because we do a mixture of sync and
      61             :   // async loads.
      62             :   bool mInLoadResourcesFunc;
      63             :   int16_t mPendingSheets; // The number of stylesheets that have yet to load.
      64             : 
      65             :   // Bound elements that are waiting on the stylesheets and scripts.
      66             :   nsCOMArray<nsIContent> mBoundElements;
      67             : 
      68             : protected:
      69             :   virtual ~nsXBLResourceLoader();
      70             : 
      71             : private:
      72             :   // The bound document is needed in StyleSheetLoaded() for servo style
      73             :   // backend, which will be set in LoadResources().
      74             :   nsIDocument* MOZ_NON_OWNING_REF mBoundDocument;
      75             : };
      76             : 
      77             : #endif