1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/xul/tree/nsTreeImageListener.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,65 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef nsTreeImageListener_h__
1.10 +#define nsTreeImageListener_h__
1.11 +
1.12 +#include "nsString.h"
1.13 +#include "nsCOMPtr.h"
1.14 +#include "nsITreeColumns.h"
1.15 +#include "nsTreeBodyFrame.h"
1.16 +#include "mozilla/Attributes.h"
1.17 +
1.18 +// This class handles image load observation.
1.19 +class nsTreeImageListener MOZ_FINAL : public imgINotificationObserver
1.20 +{
1.21 +public:
1.22 + nsTreeImageListener(nsTreeBodyFrame *aTreeFrame);
1.23 + ~nsTreeImageListener();
1.24 +
1.25 + NS_DECL_ISUPPORTS
1.26 + NS_DECL_IMGINOTIFICATIONOBSERVER
1.27 +
1.28 + NS_IMETHOD ClearFrame();
1.29 +
1.30 + friend class nsTreeBodyFrame;
1.31 +
1.32 +protected:
1.33 + void UnsuppressInvalidation() { mInvalidationSuppressed = false; }
1.34 + void Invalidate();
1.35 + void AddCell(int32_t aIndex, nsITreeColumn* aCol);
1.36 +
1.37 +private:
1.38 + nsTreeBodyFrame* mTreeFrame;
1.39 +
1.40 + // A guard that prevents us from recursive painting.
1.41 + bool mInvalidationSuppressed;
1.42 +
1.43 + class InvalidationArea {
1.44 + public:
1.45 + InvalidationArea(nsITreeColumn* aCol);
1.46 + ~InvalidationArea() { delete mNext; }
1.47 +
1.48 + friend class nsTreeImageListener;
1.49 +
1.50 + protected:
1.51 + void AddRow(int32_t aIndex);
1.52 + nsITreeColumn* GetCol() { return mCol.get(); }
1.53 + int32_t GetMin() { return mMin; }
1.54 + int32_t GetMax() { return mMax; }
1.55 + InvalidationArea* GetNext() { return mNext; }
1.56 + void SetNext(InvalidationArea* aNext) { mNext = aNext; }
1.57 +
1.58 + private:
1.59 + nsCOMPtr<nsITreeColumn> mCol;
1.60 + int32_t mMin;
1.61 + int32_t mMax;
1.62 + InvalidationArea* mNext;
1.63 + };
1.64 +
1.65 + InvalidationArea* mInvalidationArea;
1.66 +};
1.67 +
1.68 +#endif // nsTreeImageListener_h__
