new

layout/html/base/src/nsHTMLImage.h

@@ -0,0 +1,62 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.0 (the "NPL"); you may not use this file except in
+ * compliance with the NPL.  You may obtain a copy of the NPL at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the NPL is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
+ * for the specific language governing rights and limitations under the
+ * NPL.
+ *
+ * The Initial Developer of this code under the NPL is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
+ * Reserved.
+ */
+#ifndef nsHTMLImage_h___
+#define nsHTMLImage_h___
+
+#include "nslayout.h"
+#include "nsIFrameImageLoader.h"
+class nsIFrame;
+class nsIFrameImageLoader;
+class nsIPresContext;
+struct nsReflowMetrics;
+struct nsSize;
+
+/**
+ * HTML image loader. This is designed to encapsulate the loading
+ * and sizing process of html images (basically so that the logic
+ * can be reused in the image button form control code and the html
+ * image layout code).
+ */
+class nsHTMLImageLoader {
+public:
+  nsHTMLImageLoader();
+  ~nsHTMLImageLoader();
+
+  void DestroyLoader() {
+    NS_IF_RELEASE(mImageLoader);
+  }
+
+  nsIImage* GetImage();
+
+  nsresult LoadImage(nsIPresContext* aPresContext,
+                     nsIFrame* aForFrame,
+                     PRBool aNeedSizeUpdate,
+                     PRIntn& aLoadStatus);
+
+  void GetDesiredSize(nsIPresContext* aPresContext,
+                      nsIFrame* aForFrame,
+                      nsReflowMetrics& aDesiredSize,
+                      const nsSize& aMaxSize);
+
+protected:
+  nsIFrameImageLoader* mImageLoader;
+  PRPackedBool mLoadImageFailed;
+  PRPackedBool mLoadBrokenImageFailed;
+};
+
+#endif /* nsHTMLImage_h___ */