LCOV - app.info - layout/base/nsImageLoader.h

LCOV - code coverage report
| Current view: | directory - layout/base - nsImageLoader.h (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 2 | 0 | 0.0 %
| Date: | 2012-06-02 | Functions: | 2 | 0 | 0.0 %

           1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
           2                 :  *
           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) 2001
          21                 :  * the Initial Developer. All Rights Reserved.
          22                 :  *
          23                 :  * Contributor(s):
          24                 :  *   Stuart Parmenter <pavlov@netscape.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                 : /* class to notify frames of background and border image loads */
          41                 :
          42                 : #include "nsStubImageDecoderObserver.h"
          43                 :
          44                 : class nsIFrame;
          45                 : class nsIURI;
          46                 :
          47                 : #include "imgIRequest.h"
          48                 : #include "nsCOMPtr.h"
          49                 : #include "nsAutoPtr.h"
          50                 :
          51                 : /**
          52                 :  * Image loaders pass notifications for background and border image
          53                 :  * loading and animation on to the frames.
          54                 :  *
          55                 :  * Each frame's image loaders form a linked list.
          56                 :  */
          57                 : class nsImageLoader : public nsStubImageDecoderObserver
          58                 : {
          59                 : private:
          60                 :   nsImageLoader(nsIFrame *aFrame, PRUint32 aActions,
          61                 :                 nsImageLoader *aNextLoader);
          62                 :   virtual ~nsImageLoader();
          63                 :
          64                 : public:
          65                 :   /*
          66                 :    * Flags to specify actions that can be taken for the image at various
          67                 :    * times. Reflows always occur before redraws. "Decode" refers to one
          68                 :    * frame being available, whereas "load" refers to all the data being loaded
          69                 :    * from the network.
          70                 :    */
          71                 :   enum {
          72                 :     ACTION_REFLOW_ON_DECODE = 0x01,
          73                 :     ACTION_REDRAW_ON_DECODE = 0x02,
          74                 :     ACTION_REFLOW_ON_LOAD   = 0x04,
          75                 :     ACTION_REDRAW_ON_LOAD   = 0x08
          76                 :   };
          77                 :   static already_AddRefed<nsImageLoader>
          78                 :     Create(nsIFrame *aFrame, imgIRequest *aRequest,
          79                 :            PRUint32 aActions, nsImageLoader *aNextLoader);
          80                 :
          81                 :   NS_DECL_ISUPPORTS
          82                 :
          83                 :   // imgIDecoderObserver (override nsStubImageDecoderObserver)
          84                 :   NS_IMETHOD OnStartContainer(imgIRequest *aRequest, imgIContainer *aImage);
          85                 :   NS_IMETHOD OnStopFrame(imgIRequest *aRequest, PRUint32 aFrame);
          86                 :   NS_IMETHOD OnStopRequest(imgIRequest *aRequest, bool aLastPart);
          87                 :   NS_IMETHOD OnImageIsAnimated(imgIRequest *aRequest);
          88                 :   // Do not override OnDataAvailable since background images are not
          89                 :   // displayed incrementally; they are displayed after the entire image
          90                 :   // has been loaded.
          91                 :   // Note: Images referenced by the <img> element are displayed
          92                 :   // incrementally in nsImageFrame.cpp.
          93                 :
          94                 :   // imgIContainerObserver (override nsStubImageDecoderObserver)
          95                 :   NS_IMETHOD FrameChanged(imgIRequest *aRequest,
          96                 :                           imgIContainer *aContainer,
          97                 :                           const nsIntRect *aDirtyRect);
          98                 :
          99                 :   void Destroy();
         100                 :
         101               0 :   imgIRequest *GetRequest() { return mRequest; }
         102               0 :   nsImageLoader *GetNextLoader() { return mNextLoader; }
         103                 :
         104                 : private:
         105                 :   nsresult Load(imgIRequest *aImage);
         106                 :   void DoReflow();
         107                 :   /* if aDamageRect is nsnull, the whole frame is redrawn. */
         108                 :   void DoRedraw(const nsRect* aDamageRect);
         109                 :
         110                 :   nsIFrame *mFrame;
         111                 :   nsCOMPtr<imgIRequest> mRequest;
         112                 :   PRUint32 mActions;
         113                 :   nsRefPtr<nsImageLoader> mNextLoader;
         114                 :
         115                 :   // This is a boolean flag indicating whether or not the current image request
         116                 :   // has been registered with the refresh driver.
         117                 :   bool mRequestRegistered;
         118                 : };

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