Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* This Source Code Form is subject to the terms of the Mozilla Public
       3             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       4             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       5             : 
       6             : #ifndef nsTreeImageListener_h__
       7             : #define nsTreeImageListener_h__
       8             : 
       9             : #include "nsString.h"
      10             : #include "nsCOMPtr.h"
      11             : #include "nsITreeColumns.h"
      12             : #include "nsTreeBodyFrame.h"
      13             : #include "mozilla/Attributes.h"
      14             : 
      15             : // This class handles image load observation.
      16             : class nsTreeImageListener final : public imgINotificationObserver
      17             : {
      18             : public:
      19             :   explicit nsTreeImageListener(nsTreeBodyFrame *aTreeFrame);
      20             : 
      21             :   NS_DECL_ISUPPORTS
      22             :   NS_DECL_IMGINOTIFICATIONOBSERVER
      23             : 
      24             :   NS_IMETHOD ClearFrame();
      25             : 
      26             :   friend class nsTreeBodyFrame;
      27             : 
      28             : protected:
      29             :   ~nsTreeImageListener();
      30             : 
      31           0 :   void UnsuppressInvalidation() { mInvalidationSuppressed = false; }
      32             :   void Invalidate();
      33             :   void AddCell(int32_t aIndex, nsITreeColumn* aCol);
      34             : 
      35             : private:
      36             :   nsTreeBodyFrame* mTreeFrame;
      37             : 
      38             :   // A guard that prevents us from recursive painting.
      39             :   bool mInvalidationSuppressed;
      40             : 
      41             :   class InvalidationArea {
      42             :     public:
      43             :       explicit InvalidationArea(nsITreeColumn* aCol);
      44           0 :       ~InvalidationArea() { delete mNext; }
      45             : 
      46             :       friend class nsTreeImageListener;
      47             : 
      48             :     protected:
      49             :       void AddRow(int32_t aIndex);
      50           0 :       nsITreeColumn* GetCol() { return mCol.get(); }
      51           0 :       int32_t GetMin() { return mMin; }
      52           0 :       int32_t GetMax() { return mMax; }
      53           0 :       InvalidationArea* GetNext() { return mNext; }
      54           0 :       void SetNext(InvalidationArea* aNext) { mNext = aNext; }
      55             : 
      56             :     private:
      57             :       nsCOMPtr<nsITreeColumn> mCol;
      58             :       int32_t                 mMin;
      59             :       int32_t                 mMax;
      60             :       InvalidationArea*       mNext;
      61             :   };
      62             : 
      63             :   InvalidationArea* mInvalidationArea;
      64             : };
      65             : 
      66             : #endif // nsTreeImageListener_h__