author Valentin Gosu <>
Fri, 15 Dec 2017 15:46:24 -0600
changeset 396786 9b69f2b7d37346a5ac8aff8aeec2fe23673fe566
parent 395179 3247630382cbdda39f172a2b17c2260632eab0a2
child 406623 7aa0c88ffbb04ba284958c39d925f3870def5697
permissions -rw-r--r--
Bug 1424834 - Replace nsHostRecord.callbacks with LinkedList<RefPtr<nsResolveHostCallback>> r=mayhemer * nsResolveHostCallback extends nsISupports (for addref-ing and because nsDNSAsyncRequest implements nsICancelable) * nsResolveHostCallback extends LinkedListElement<RefPtr<nsResolveHostCallback>> so the list can properly manage references * nsDNSAsyncRequest and nsDNSSyncRequest properly implement nsISupports and use RefPtr to manage lifetimes MozReview-Commit-ID: 5NvBcWZzfyN

/* -*- 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 */
#ifndef mozilla_dom_ImageDocument_h
#define mozilla_dom_ImageDocument_h

#include "mozilla/Attributes.h"
#include "imgINotificationObserver.h"
#include "MediaDocument.h"
#include "nsIDOMEventListener.h"
#include "nsIImageDocument.h"

namespace mozilla {
namespace dom {

class ImageDocument final : public MediaDocument,
                            public nsIImageDocument,
                            public imgINotificationObserver,
                            public nsIDOMEventListener


  virtual nsresult Init() override;

  virtual nsresult StartDocumentLoad(const char*         aCommand,
                                     nsIChannel*         aChannel,
                                     nsILoadGroup*       aLoadGroup,
                                     nsISupports*        aContainer,
                                     nsIStreamListener** aDocListener,
                                     bool                aReset = true,
                                     nsIContentSink*     aSink = nullptr) override;

  virtual void SetScriptGlobalObject(nsIScriptGlobalObject* aScriptGlobalObject) override;
  virtual void Destroy() override;
  virtual void OnPageShow(bool aPersisted,
                          EventTarget* aDispatchStartTarget) override;


  // nsIDOMEventListener
  NS_IMETHOD HandleEvent(nsIDOMEvent* aEvent) override;


  friend class ImageListener;

  void DefaultCheckOverflowing() { CheckOverflowing(mResizeImageByDefault); }

  // WebIDL API
  virtual JSObject* WrapNode(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)

  bool ImageIsOverflowing() const
    return mImageIsOverflowingHorizontally || mImageIsOverflowingVertically;
  bool ImageIsResized() const
    return mImageIsResized;
  already_AddRefed<imgIRequest> GetImageRequest(ErrorResult& aRv);
  // ShrinkToFit is called from xpidl methods and we don't have a good
  // way to mark those MOZ_CAN_RUN_SCRIPT yet.
  void RestoreImage();
  void RestoreImageTo(int32_t aX, int32_t aY)
    ScrollImageTo(aX, aY, true);
  void ToggleImageSize();

  virtual ~ImageDocument();

  virtual nsresult CreateSyntheticDocument() override;

  nsresult CheckOverflowing(bool changeState);

  void UpdateTitleAndCharset();

  void ScrollImageTo(int32_t aX, int32_t aY, bool restoreImage);

  float GetRatio() {
    return std::min(mVisibleWidth / mImageWidth,
                    mVisibleHeight / mImageHeight);

  void ResetZoomLevel();
  float GetZoomLevel();

  void UpdateSizeFromLayout();

  enum eModeClasses {
    eOverflowingVertical, // And maybe horizontal too.
  void SetModeClass(eModeClasses mode);

  nsresult OnSizeAvailable(imgIRequest* aRequest, imgIContainer* aImage);
  nsresult OnLoadComplete(imgIRequest* aRequest, nsresult aStatus);
  void OnHasTransparency();

  nsCOMPtr<Element>             mImageContent;

  float                         mVisibleWidth;
  float                         mVisibleHeight;
  int32_t                       mImageWidth;
  int32_t                       mImageHeight;

  bool                          mResizeImageByDefault;
  bool                          mClickResizingEnabled;
  bool                          mImageIsOverflowingHorizontally;
  bool                          mImageIsOverflowingVertically;
  // mImageIsResized is true if the image is currently resized
  bool                          mImageIsResized;
  // mShouldResize is true if the image should be resized when it doesn't fit
  // mImageIsResized cannot be true when this is false, but mImageIsResized
  // can be false when this is true
  bool                          mShouldResize;
  bool                          mFirstResize;
  // mObservingImageLoader is true while the observer is set.
  bool                          mObservingImageLoader;

  float                         mOriginalZoomLevel;

} // namespace dom
} // namespace mozilla

#endif /* mozilla_dom_ImageDocument_h */