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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* code for HTML client-side image maps */
#ifndef nsImageMap_h
#define nsImageMap_h
#include "mozilla/gfx/2D.h"
#include "nsCOMPtr.h"
#include "nsCoord.h"
#include "nsTArray.h"
#include "nsStubMutationObserver.h"
#include "nsIDOMEventListener.h"
class Area;
class nsImageFrame;
class nsIFrame;
class nsIContent;
struct nsRect;
class nsImageMap final : public nsStubMutationObserver,
public nsIDOMEventListener
{
typedef mozilla::gfx::DrawTarget DrawTarget;
typedef mozilla::gfx::ColorPattern ColorPattern;
typedef mozilla::gfx::StrokeOptions StrokeOptions;
public:
nsImageMap();
nsresult Init(nsImageFrame* aImageFrame, nsIContent* aMap);
/**
* Return the first area element (in content order) for the given aX,aY pixel
* coordinate or nullptr if the coordinate is outside all areas.
*/
nsIContent* GetArea(nscoord aX, nscoord aY) const;
/**
* Return area elements count associated with the image map.
*/
uint32_t AreaCount() const { return mAreas.Length(); }
/**
* Return area element at the given index.
*/
nsIContent* GetAreaAt(uint32_t aIndex) const;
void Draw(nsIFrame* aFrame, DrawTarget& aDrawTarget,
const ColorPattern& aColor,
const StrokeOptions& aStrokeOptions = StrokeOptions());
/**
* Called just before the nsImageFrame releases us.
* Used to break the cycle caused by the DOM listener.
*/
void Destroy();
// nsISupports
NS_DECL_ISUPPORTS
// nsIMutationObserver
NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
NS_DECL_NSIMUTATIONOBSERVER_PARENTCHAINCHANGED
//nsIDOMEventListener
NS_DECL_NSIDOMEVENTLISTENER
nsresult GetBoundsForAreaContent(nsIContent *aContent,
nsRect& aBounds);
protected:
virtual ~nsImageMap();
void FreeAreas();
nsresult UpdateAreas();
nsresult SearchForAreas(nsIContent* aParent, bool& aFoundArea,
bool& aFoundAnchor);
nsresult AddArea(nsIContent* aArea);
void MaybeUpdateAreas(nsIContent *aContent);
nsImageFrame* mImageFrame; // the frame that owns us
nsCOMPtr<nsIContent> mMap;
AutoTArray<Area*, 8> mAreas; // almost always has some entries
bool mContainsBlockContents;
};
#endif /* nsImageMap_h */
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