The Tor Browser: layout/xul/nsImageBoxFrame.h@7e26c7da4463

     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/. */

     5 #ifndef nsImageBoxFrame_h___

     6 #define nsImageBoxFrame_h___

     8 #include "mozilla/Attributes.h"

     9 #include "nsLeafBoxFrame.h"

    11 #include "imgILoader.h"

    12 #include "imgIRequest.h"

    13 #include "imgIContainer.h"

    14 #include "imgINotificationObserver.h"

    15 #include "imgIOnloadBlocker.h"

    17 class imgRequestProxy;

    18 class nsImageBoxFrame;

    20 class nsDisplayXULImage;

    22 class nsImageBoxListener : public imgINotificationObserver,

    23                            public imgIOnloadBlocker

    24 {

    25 public:

    26   nsImageBoxListener();

    27   virtual ~nsImageBoxListener();

    29   NS_DECL_ISUPPORTS

    30   NS_DECL_IMGINOTIFICATIONOBSERVER

    31   NS_DECL_IMGIONLOADBLOCKER

    33   void SetFrame(nsImageBoxFrame *frame) { mFrame = frame; }

    35 private:

    36   nsImageBoxFrame *mFrame;

    37 };

    39 class nsImageBoxFrame : public nsLeafBoxFrame

    40 {

    41 public:

    42   typedef mozilla::layers::LayerManager LayerManager;

    44   friend class nsDisplayXULImage;

    45   NS_DECL_FRAMEARENA_HELPERS

    47   virtual nsSize GetPrefSize(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;

    48   virtual nsSize GetMinSize(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;

    49   virtual nscoord GetBoxAscent(nsBoxLayoutState& aBoxLayoutState) MOZ_OVERRIDE;

    50   virtual void MarkIntrinsicWidthsDirty() MOZ_OVERRIDE;

    52   nsresult Notify(imgIRequest *aRequest, int32_t aType, const nsIntRect* aData);

    54   friend nsIFrame* NS_NewImageBoxFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);

    56   virtual void Init(nsIContent*      aContent,

    57                     nsIFrame*        aParent,

    58                     nsIFrame*        asPrevInFlow) MOZ_OVERRIDE;

    60   virtual nsresult AttributeChanged(int32_t aNameSpaceID,

    61                                     nsIAtom* aAttribute,

    62                                     int32_t aModType) MOZ_OVERRIDE;

    64   virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext) MOZ_OVERRIDE;

    66   virtual void DestroyFrom(nsIFrame* aDestructRoot) MOZ_OVERRIDE;

    68   virtual nsIAtom* GetType() const MOZ_OVERRIDE;

    69 #ifdef DEBUG_FRAME_DUMP

    70   virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;

    71 #endif

    73   /**

    74    * Update mUseSrcAttr from appropriate content attributes or from

    75    * style, throw away the current image, and load the appropriate

    76    * image.

    77    * */

    78   void UpdateImage();

    80   /**

    81    * Update mLoadFlags from content attributes. Does not attempt to reload the

    82    * image using the new load flags.

    83    */

    84   void UpdateLoadFlags();

    86   virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,

    87                                 const nsRect&           aDirtyRect,

    88                                 const nsDisplayListSet& aLists) MOZ_OVERRIDE;

    90   virtual ~nsImageBoxFrame();

    92   void  PaintImage(nsRenderingContext& aRenderingContext,

    93                    const nsRect& aDirtyRect,

    94                    nsPoint aPt, uint32_t aFlags);

    96   already_AddRefed<mozilla::layers::ImageContainer> GetContainer(LayerManager* aManager);

    97 protected:

    98   nsImageBoxFrame(nsIPresShell* aShell, nsStyleContext* aContext);

   100   virtual void GetImageSize();

   102 private:

   103   nsresult OnStartContainer(imgIRequest *request, imgIContainer *image);

   104   nsresult OnStopDecode(imgIRequest *request);

   105   nsresult OnStopRequest(imgIRequest *request, nsresult status);

   106   nsresult OnImageIsAnimated(imgIRequest* aRequest);

   107   nsresult FrameChanged(imgIRequest *aRequest);

   109   nsRect mSubRect; ///< If set, indicates that only the portion of the image specified by the rect should be used.

   110   nsSize mIntrinsicSize;

   111   nsSize mImageSize;

   113   // Boolean variable to determine if the current image request has been

   114   // registered with the refresh driver.

   115   bool mRequestRegistered;

   117   nsRefPtr<imgRequestProxy> mImageRequest;

   118   nsCOMPtr<imgINotificationObserver> mListener;

   120   int32_t mLoadFlags;

   122   bool mUseSrcAttr; ///< Whether or not the image src comes from an attribute.

   123   bool mSuppressStyleCheck;

   124   bool mFireEventOnDecode;

   125 }; // class nsImageBoxFrame

   127 class nsDisplayXULImage : public nsDisplayImageContainer {

   128 public:

   129   nsDisplayXULImage(nsDisplayListBuilder* aBuilder,

   130                     nsImageBoxFrame* aFrame) :

   131     nsDisplayImageContainer(aBuilder, aFrame) {

   132     MOZ_COUNT_CTOR(nsDisplayXULImage);

   133   }

   134 #ifdef NS_BUILD_REFCNT_LOGGING

   135   virtual ~nsDisplayXULImage() {

   136     MOZ_COUNT_DTOR(nsDisplayXULImage);

   137   }

   138 #endif

   140   virtual already_AddRefed<ImageContainer> GetContainer(LayerManager* aManager,

   141                                                         nsDisplayListBuilder* aBuilder) MOZ_OVERRIDE;

   142   virtual void ConfigureLayer(ImageLayer* aLayer, const nsIntPoint& aOffset) MOZ_OVERRIDE;

   143   virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) MOZ_OVERRIDE

   144   {

   145     *aSnap = true;

   146     return nsRect(ToReferenceFrame(), Frame()->GetSize());

   147   }

   148   virtual void ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,

   149                                          const nsDisplayItemGeometry* aGeometry,

   150                                          nsRegion* aInvalidRegion) MOZ_OVERRIDE;

   151   // Doesn't handle HitTest because nsLeafBoxFrame already creates an

   152   // event receiver for us

   153   virtual void Paint(nsDisplayListBuilder* aBuilder,

   154                      nsRenderingContext* aCtx) MOZ_OVERRIDE;

   155   NS_DISPLAY_DECL_NAME("XULImage", TYPE_XUL_IMAGE)

   156 };

   158 #endif /* nsImageBoxFrame_h___ */

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