1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/generic/nsImageMap.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,91 @@
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 +/* code for HTML client-side image maps */
1.10 +
1.11 +#ifndef nsImageMap_h
1.12 +#define nsImageMap_h
1.13 +
1.14 +#include "nsCOMPtr.h"
1.15 +#include "nsCoord.h"
1.16 +#include "nsTArray.h"
1.17 +#include "nsStubMutationObserver.h"
1.18 +#include "nsIDOMEventListener.h"
1.19 +
1.20 +class Area;
1.21 +class nsRenderingContext;
1.22 +class nsImageFrame;
1.23 +class nsIFrame;
1.24 +class nsIContent;
1.25 +struct nsRect;
1.26 +
1.27 +class nsImageMap : public nsStubMutationObserver,
1.28 + public nsIDOMEventListener
1.29 +{
1.30 +public:
1.31 + nsImageMap();
1.32 +
1.33 + nsresult Init(nsImageFrame* aImageFrame, nsIContent* aMap);
1.34 +
1.35 + /**
1.36 + * Return the first area element (in content order) for the given aX,aY pixel
1.37 + * coordinate or nullptr if the coordinate is outside all areas.
1.38 + */
1.39 + nsIContent* GetArea(nscoord aX, nscoord aY) const;
1.40 +
1.41 + /**
1.42 + * Return area elements count associated with the image map.
1.43 + */
1.44 + uint32_t AreaCount() const { return mAreas.Length(); }
1.45 +
1.46 + /**
1.47 + * Return area element at the given index.
1.48 + */
1.49 + nsIContent* GetAreaAt(uint32_t aIndex) const;
1.50 +
1.51 + void Draw(nsIFrame* aFrame, nsRenderingContext& aRC);
1.52 +
1.53 + /**
1.54 + * Called just before the nsImageFrame releases us.
1.55 + * Used to break the cycle caused by the DOM listener.
1.56 + */
1.57 + void Destroy();
1.58 +
1.59 + // nsISupports
1.60 + NS_DECL_ISUPPORTS
1.61 +
1.62 + // nsIMutationObserver
1.63 + NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
1.64 + NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
1.65 + NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
1.66 + NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
1.67 + NS_DECL_NSIMUTATIONOBSERVER_PARENTCHAINCHANGED
1.68 +
1.69 + //nsIDOMEventListener
1.70 + NS_DECL_NSIDOMEVENTLISTENER
1.71 +
1.72 + nsresult GetBoundsForAreaContent(nsIContent *aContent,
1.73 + nsRect& aBounds);
1.74 +
1.75 +protected:
1.76 + virtual ~nsImageMap();
1.77 +
1.78 + void FreeAreas();
1.79 +
1.80 + nsresult UpdateAreas();
1.81 + nsresult SearchForAreas(nsIContent* aParent, bool& aFoundArea,
1.82 + bool& aFoundAnchor);
1.83 +
1.84 + nsresult AddArea(nsIContent* aArea);
1.85 +
1.86 + void MaybeUpdateAreas(nsIContent *aContent);
1.87 +
1.88 + nsImageFrame* mImageFrame; // the frame that owns us
1.89 + nsCOMPtr<nsIContent> mMap;
1.90 + nsAutoTArray<Area*, 8> mAreas; // almost always has some entries
1.91 + bool mContainsBlockContents;
1.92 +};
1.93 +
1.94 +#endif /* nsImageMap_h */
