michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: #ifndef mozilla_dom_ImageDocument_h
michael@0: #define mozilla_dom_ImageDocument_h
michael@0: 
michael@0: #include "mozilla/Attributes.h"
michael@0: #include "imgINotificationObserver.h"
michael@0: #include "MediaDocument.h"
michael@0: #include "nsIDOMEventListener.h"
michael@0: #include "nsIImageDocument.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace dom {
michael@0: 
michael@0: class ImageDocument MOZ_FINAL : public MediaDocument,
michael@0:                                 public nsIImageDocument,
michael@0:                                 public imgINotificationObserver,
michael@0:                                 public nsIDOMEventListener
michael@0: {
michael@0: public:
michael@0:   ImageDocument();
michael@0:   virtual ~ImageDocument();
michael@0: 
michael@0:   NS_DECL_ISUPPORTS_INHERITED
michael@0: 
michael@0:   virtual nsresult Init() MOZ_OVERRIDE;
michael@0: 
michael@0:   virtual nsresult StartDocumentLoad(const char*         aCommand,
michael@0:                                      nsIChannel*         aChannel,
michael@0:                                      nsILoadGroup*       aLoadGroup,
michael@0:                                      nsISupports*        aContainer,
michael@0:                                      nsIStreamListener** aDocListener,
michael@0:                                      bool                aReset = true,
michael@0:                                      nsIContentSink*     aSink = nullptr) MOZ_OVERRIDE;
michael@0: 
michael@0:   virtual void SetScriptGlobalObject(nsIScriptGlobalObject* aScriptGlobalObject) MOZ_OVERRIDE;
michael@0:   virtual void Destroy() MOZ_OVERRIDE;
michael@0:   virtual void OnPageShow(bool aPersisted,
michael@0:                           EventTarget* aDispatchStartTarget) MOZ_OVERRIDE;
michael@0: 
michael@0:   NS_DECL_NSIIMAGEDOCUMENT
michael@0:   NS_DECL_IMGINOTIFICATIONOBSERVER
michael@0: 
michael@0:   // nsIDOMEventListener
michael@0:   NS_IMETHOD HandleEvent(nsIDOMEvent* aEvent) MOZ_OVERRIDE;
michael@0: 
michael@0:   NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(ImageDocument, MediaDocument)
michael@0: 
michael@0:   friend class ImageListener;
michael@0: 
michael@0:   void DefaultCheckOverflowing() { CheckOverflowing(mResizeImageByDefault); }
michael@0: 
michael@0:   // WebIDL API
michael@0:   virtual JSObject* WrapNode(JSContext* aCx)
michael@0:     MOZ_OVERRIDE;
michael@0: 
michael@0:   bool ImageResizingEnabled() const
michael@0:   {
michael@0:     return true;
michael@0:   }
michael@0:   bool ImageIsOverflowing() const
michael@0:   {
michael@0:     return mImageIsOverflowing;
michael@0:   }
michael@0:   bool ImageIsResized() const
michael@0:   {
michael@0:     return mImageIsResized;
michael@0:   }
michael@0:   already_AddRefed<imgIRequest> GetImageRequest(ErrorResult& aRv);
michael@0:   void ShrinkToFit();
michael@0:   void RestoreImage();
michael@0:   void RestoreImageTo(int32_t aX, int32_t aY)
michael@0:   {
michael@0:     ScrollImageTo(aX, aY, true);
michael@0:   }
michael@0:   void ToggleImageSize();
michael@0: 
michael@0: protected:
michael@0:   virtual nsresult CreateSyntheticDocument();
michael@0: 
michael@0:   nsresult CheckOverflowing(bool changeState);
michael@0: 
michael@0:   void UpdateTitleAndCharset();
michael@0: 
michael@0:   void ScrollImageTo(int32_t aX, int32_t aY, bool restoreImage);
michael@0: 
michael@0:   float GetRatio() {
michael@0:     return std::min(mVisibleWidth / mImageWidth,
michael@0:                     mVisibleHeight / mImageHeight);
michael@0:   }
michael@0: 
michael@0:   void ResetZoomLevel();
michael@0:   float GetZoomLevel();
michael@0: 
michael@0:   void UpdateSizeFromLayout();
michael@0: 
michael@0:   enum eModeClasses {
michael@0:     eNone,
michael@0:     eShrinkToFit,
michael@0:     eOverflowing
michael@0:   };
michael@0:   void SetModeClass(eModeClasses mode);
michael@0: 
michael@0:   nsresult OnStartContainer(imgIRequest* aRequest, imgIContainer* aImage);
michael@0:   nsresult OnStopRequest(imgIRequest *aRequest, nsresult aStatus);
michael@0: 
michael@0:   nsCOMPtr<nsIContent>          mImageContent;
michael@0: 
michael@0:   float                         mVisibleWidth;
michael@0:   float                         mVisibleHeight;
michael@0:   int32_t                       mImageWidth;
michael@0:   int32_t                       mImageHeight;
michael@0: 
michael@0:   bool                          mResizeImageByDefault;
michael@0:   bool                          mClickResizingEnabled;
michael@0:   bool                          mImageIsOverflowing;
michael@0:   // mImageIsResized is true if the image is currently resized
michael@0:   bool                          mImageIsResized;
michael@0:   // mShouldResize is true if the image should be resized when it doesn't fit
michael@0:   // mImageIsResized cannot be true when this is false, but mImageIsResized
michael@0:   // can be false when this is true
michael@0:   bool                          mShouldResize;
michael@0:   bool                          mFirstResize;
michael@0:   // mObservingImageLoader is true while the observer is set.
michael@0:   bool                          mObservingImageLoader;
michael@0: 
michael@0:   float                         mOriginalZoomLevel;
michael@0: };
michael@0: 
michael@0: } // namespace dom
michael@0: } // namespace mozilla
michael@0: 
michael@0: #endif /* mozilla_dom_ImageDocument_h */