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