зеркало из https://github.com/mozilla/gecko-dev.git
137 строки
4.3 KiB
C++
137 строки
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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#ifndef mozilla_dom_ImageDocument_h
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#define mozilla_dom_ImageDocument_h
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#include "mozilla/Attributes.h"
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#include "imgINotificationObserver.h"
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#include "MediaDocument.h"
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#include "nsIDOMEventListener.h"
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#include "nsIImageDocument.h"
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namespace mozilla {
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namespace dom {
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class ImageDocument final : public MediaDocument,
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public nsIImageDocument,
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public imgINotificationObserver,
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public nsIDOMEventListener
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{
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public:
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ImageDocument();
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NS_DECL_ISUPPORTS_INHERITED
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virtual nsresult Init() override;
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virtual nsresult StartDocumentLoad(const char* aCommand,
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nsIChannel* aChannel,
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nsILoadGroup* aLoadGroup,
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nsISupports* aContainer,
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nsIStreamListener** aDocListener,
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bool aReset = true,
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nsIContentSink* aSink = nullptr) override;
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virtual void SetScriptGlobalObject(nsIScriptGlobalObject* aScriptGlobalObject) override;
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virtual void Destroy() override;
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virtual void OnPageShow(bool aPersisted,
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EventTarget* aDispatchStartTarget) override;
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NS_DECL_NSIIMAGEDOCUMENT
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NS_DECL_IMGINOTIFICATIONOBSERVER
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// nsIDOMEventListener
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NS_IMETHOD HandleEvent(nsIDOMEvent* aEvent) override;
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(ImageDocument, MediaDocument)
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friend class ImageListener;
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void DefaultCheckOverflowing() { CheckOverflowing(mResizeImageByDefault); }
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// WebIDL API
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virtual JSObject* WrapNode(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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override;
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bool ImageIsOverflowing() const
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{
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return mImageIsOverflowingHorizontally || mImageIsOverflowingVertically;
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}
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bool ImageIsResized() const
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{
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return mImageIsResized;
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}
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already_AddRefed<imgIRequest> GetImageRequest(ErrorResult& aRv);
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void ShrinkToFit();
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void RestoreImage();
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void RestoreImageTo(int32_t aX, int32_t aY)
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{
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ScrollImageTo(aX, aY, true);
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}
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void ToggleImageSize();
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protected:
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virtual ~ImageDocument();
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virtual nsresult CreateSyntheticDocument() override;
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nsresult CheckOverflowing(bool changeState);
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void UpdateTitleAndCharset();
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void ScrollImageTo(int32_t aX, int32_t aY, bool restoreImage);
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float GetRatio() {
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return std::min(mVisibleWidth / mImageWidth,
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mVisibleHeight / mImageHeight);
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}
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void ResetZoomLevel();
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float GetZoomLevel();
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void UpdateSizeFromLayout();
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enum eModeClasses {
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eNone,
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eShrinkToFit,
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eOverflowingVertical, // And maybe horizontal too.
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eOverflowingHorizontalOnly
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};
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void SetModeClass(eModeClasses mode);
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nsresult OnSizeAvailable(imgIRequest* aRequest, imgIContainer* aImage);
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nsresult OnLoadComplete(imgIRequest* aRequest, nsresult aStatus);
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void OnHasTransparency();
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nsCOMPtr<Element> mImageContent;
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float mVisibleWidth;
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float mVisibleHeight;
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int32_t mImageWidth;
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int32_t mImageHeight;
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bool mResizeImageByDefault;
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bool mClickResizingEnabled;
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bool mImageIsOverflowingHorizontally;
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bool mImageIsOverflowingVertically;
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// mImageIsResized is true if the image is currently resized
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bool mImageIsResized;
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// mShouldResize is true if the image should be resized when it doesn't fit
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// mImageIsResized cannot be true when this is false, but mImageIsResized
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// can be false when this is true
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bool mShouldResize;
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bool mFirstResize;
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// mObservingImageLoader is true while the observer is set.
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bool mObservingImageLoader;
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float mOriginalZoomLevel;
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};
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} // namespace dom
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} // namespace mozilla
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#endif /* mozilla_dom_ImageDocument_h */
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