michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef nsTreeImageListener_h__
michael@0: #define nsTreeImageListener_h__
michael@0: 
michael@0: #include "nsString.h"
michael@0: #include "nsCOMPtr.h"
michael@0: #include "nsITreeColumns.h"
michael@0: #include "nsTreeBodyFrame.h"
michael@0: #include "mozilla/Attributes.h"
michael@0: 
michael@0: // This class handles image load observation.
michael@0: class nsTreeImageListener MOZ_FINAL : public imgINotificationObserver
michael@0: {
michael@0: public:
michael@0:   nsTreeImageListener(nsTreeBodyFrame *aTreeFrame);
michael@0:   ~nsTreeImageListener();
michael@0: 
michael@0:   NS_DECL_ISUPPORTS
michael@0:   NS_DECL_IMGINOTIFICATIONOBSERVER
michael@0: 
michael@0:   NS_IMETHOD ClearFrame();
michael@0: 
michael@0:   friend class nsTreeBodyFrame;
michael@0: 
michael@0: protected:
michael@0:   void UnsuppressInvalidation() { mInvalidationSuppressed = false; }
michael@0:   void Invalidate();
michael@0:   void AddCell(int32_t aIndex, nsITreeColumn* aCol);
michael@0: 
michael@0: private:
michael@0:   nsTreeBodyFrame* mTreeFrame;
michael@0: 
michael@0:   // A guard that prevents us from recursive painting.
michael@0:   bool mInvalidationSuppressed;
michael@0: 
michael@0:   class InvalidationArea {
michael@0:     public:
michael@0:       InvalidationArea(nsITreeColumn* aCol);
michael@0:       ~InvalidationArea() { delete mNext; }
michael@0: 
michael@0:       friend class nsTreeImageListener;
michael@0: 
michael@0:     protected:
michael@0:       void AddRow(int32_t aIndex);
michael@0:       nsITreeColumn* GetCol() { return mCol.get(); }
michael@0:       int32_t GetMin() { return mMin; }
michael@0:       int32_t GetMax() { return mMax; }
michael@0:       InvalidationArea* GetNext() { return mNext; }
michael@0:       void SetNext(InvalidationArea* aNext) { mNext = aNext; }
michael@0: 
michael@0:     private:
michael@0:       nsCOMPtr<nsITreeColumn> mCol;
michael@0:       int32_t                 mMin;
michael@0:       int32_t                 mMax;
michael@0:       InvalidationArea*       mNext;
michael@0:   };
michael@0: 
michael@0:   InvalidationArea* mInvalidationArea;
michael@0: };
michael@0: 
michael@0: #endif // nsTreeImageListener_h__