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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 */
/* 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"
#include "Units.h"
class Area;
class nsImageFrame;
class nsIFrame;
class nsIContent;
struct nsRect;
namespace mozilla {
namespace dom {
class HTMLAreaElement;
} // namespace mozilla
class nsImageMap final : public nsStubMutationObserver,
public nsIDOMEventListener {
typedef mozilla::gfx::DrawTarget DrawTarget;
typedef mozilla::gfx::ColorPattern ColorPattern;
typedef mozilla::gfx::StrokeOptions StrokeOptions;
void Init(nsImageFrame* aImageFrame, nsIContent* aMap);
* Return the first area element (in content order) for the given point in
* CSS pixel coordinate or nullptr if the coordinate is outside all areas.
mozilla::dom::HTMLAreaElement* GetArea(const mozilla::CSSIntPoint& aPt) const;
* Return area elements count associated with the image map.
uint32_t AreaCount() const { return mAreas.Length(); }
* Return area element at the given index.
mozilla::dom::HTMLAreaElement* 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
// nsIMutationObserver
// nsIDOMEventListener
nsresult GetBoundsForAreaContent(nsIContent* aContent, nsRect& aBounds);
using AreaList = AutoTArray<mozilla::UniquePtr<Area>, 8>;
virtual ~nsImageMap();
void FreeAreas();
void UpdateAreas();
void SearchForAreas(nsIContent* aParent);
void AddArea(mozilla::dom::HTMLAreaElement* aArea);
void AreaRemoved(mozilla::dom::HTMLAreaElement* aArea);
void MaybeUpdateAreas(nsIContent* aContent);
nsImageFrame* mImageFrame; // the frame that owns us
nsCOMPtr<nsIContent> mMap;
// almost always has some entries
AreaList mAreas;
// This is set when we search for all area children and tells us whether we
// should consider the whole subtree or just direct children when we get
// content notifications about changes inside the map subtree.
bool mConsiderWholeSubtree;
#endif /* nsImageMap_h */