The Tor Browser: layout/generic/nsImageMap.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 /* code for HTML client-side image maps */

     8 #ifndef nsImageMap_h

     9 #define nsImageMap_h

    11 #include "nsCOMPtr.h"

    12 #include "nsCoord.h"

    13 #include "nsTArray.h"

    14 #include "nsStubMutationObserver.h"

    15 #include "nsIDOMEventListener.h"

    17 class Area;

    18 class nsRenderingContext;

    19 class nsImageFrame;

    20 class nsIFrame;

    21 class nsIContent;

    22 struct nsRect;

    24 class nsImageMap : public nsStubMutationObserver,

    25                    public nsIDOMEventListener

    26 {

    27 public:

    28   nsImageMap();

    30   nsresult Init(nsImageFrame* aImageFrame, nsIContent* aMap);

    32   /**

    33    * Return the first area element (in content order) for the given aX,aY pixel

    34    * coordinate or nullptr if the coordinate is outside all areas.

    35    */

    36   nsIContent* GetArea(nscoord aX, nscoord aY) const;

    38   /**

    39    * Return area elements count associated with the image map.

    40    */

    41   uint32_t AreaCount() const { return mAreas.Length(); }

    43   /**

    44    * Return area element at the given index.

    45    */

    46   nsIContent* GetAreaAt(uint32_t aIndex) const;

    48   void Draw(nsIFrame* aFrame, nsRenderingContext& aRC);

    50   /**

    51    * Called just before the nsImageFrame releases us.

    52    * Used to break the cycle caused by the DOM listener.

    53    */

    54   void Destroy();

    56   // nsISupports

    57   NS_DECL_ISUPPORTS

    59   // nsIMutationObserver

    60   NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED

    61   NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED

    62   NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED

    63   NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED

    64   NS_DECL_NSIMUTATIONOBSERVER_PARENTCHAINCHANGED

    66   //nsIDOMEventListener

    67   NS_DECL_NSIDOMEVENTLISTENER

    69   nsresult GetBoundsForAreaContent(nsIContent *aContent,

    70                                    nsRect& aBounds);

    72 protected:

    73   virtual ~nsImageMap();

    75   void FreeAreas();

    77   nsresult UpdateAreas();

    78   nsresult SearchForAreas(nsIContent* aParent, bool& aFoundArea,

    79                           bool& aFoundAnchor);

    81   nsresult AddArea(nsIContent* aArea);

    83   void MaybeUpdateAreas(nsIContent *aContent);

    85   nsImageFrame* mImageFrame;  // the frame that owns us

    86   nsCOMPtr<nsIContent> mMap;

    87   nsAutoTArray<Area*, 8> mAreas; // almost always has some entries

    88   bool mContainsBlockContents;

    89 };

    91 #endif /* nsImageMap_h */

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