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