зеркало из https://github.com/mozilla/gecko-dev.git
138 строки
3.9 KiB
C++
138 строки
3.9 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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namespace mozilla {
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namespace dom {
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class HTMLImageElement;
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class ImageDocument final : public MediaDocument,
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public imgINotificationObserver,
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public nsIDOMEventListener {
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public:
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ImageDocument();
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NS_DECL_ISUPPORTS_INHERITED
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enum MediaDocumentKind MediaDocumentKind() const override {
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return MediaDocumentKind::Image;
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}
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nsresult Init() override;
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nsresult StartDocumentLoad(const char* aCommand, nsIChannel* aChannel,
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nsILoadGroup* aLoadGroup, 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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void SetScriptGlobalObject(nsIScriptGlobalObject*) override;
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void Destroy() override;
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void OnPageShow(bool aPersisted, EventTarget* aDispatchStartTarget,
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bool aOnlySystemGroup = false) override;
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NS_DECL_IMGINOTIFICATIONOBSERVER
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// nsIDOMEventListener
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NS_DECL_NSIDOMEVENTLISTENER
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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();
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// WebIDL API
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JSObject* WrapNode(JSContext*, JS::Handle<JSObject*> aGivenProto) override;
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bool ImageIsOverflowing() const {
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return ImageIsOverflowingHorizontally() || ImageIsOverflowingVertically();
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}
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bool ImageIsOverflowingVertically() const {
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return mImageHeight > mVisibleHeight;
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}
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bool ImageIsOverflowingHorizontally() const {
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return mImageWidth > mVisibleWidth;
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}
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bool ImageIsResized() const { return mImageIsResized; }
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// ShrinkToFit is called from xpidl methods and we don't have a good
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// way to mark those MOZ_CAN_RUN_SCRIPT yet.
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MOZ_CAN_RUN_SCRIPT_BOUNDARY void ShrinkToFit();
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void RestoreImage();
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void NotifyPossibleTitleChange(bool aBoundTitleElement) override;
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protected:
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virtual ~ImageDocument();
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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);
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float GetRatio() {
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return std::min(mVisibleWidth / mImageWidth, mVisibleHeight / mImageHeight);
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}
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void ResetZoomLevel();
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float GetZoomLevel();
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float GetResolution();
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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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void OnSizeAvailable(imgIRequest* aRequest, imgIContainer* aImage);
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void OnLoadComplete(imgIRequest* aRequest, nsresult aStatus);
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void OnHasTransparency();
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RefPtr<HTMLImageElement> 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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// 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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bool mTitleUpdateInProgress;
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bool mHasCustomTitle;
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float mOriginalZoomLevel;
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float mOriginalResolution;
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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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