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-rw-r--r--dom/html/ImageDocument.h157
1 files changed, 157 insertions, 0 deletions
diff --git a/dom/html/ImageDocument.h b/dom/html/ImageDocument.h
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+/* -*- 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 http://mozilla.org/MPL/2.0/. */
+#ifndef mozilla_dom_ImageDocument_h
+#define mozilla_dom_ImageDocument_h
+
+#include "mozilla/Attributes.h"
+#include "imgINotificationObserver.h"
+#include "mozilla/dom/MediaDocument.h"
+#include "nsIDOMEventListener.h"
+
+namespace mozilla {
+enum class StyleImageRendering : uint8_t;
+struct IntrinsicSize;
+} // namespace mozilla
+
+namespace mozilla::dom {
+class HTMLImageElement;
+
+class ImageDocument final : public MediaDocument,
+ public imgINotificationObserver,
+ public nsIDOMEventListener {
+ public:
+ ImageDocument();
+
+ NS_DECL_ISUPPORTS_INHERITED
+
+ enum MediaDocumentKind MediaDocumentKind() const override {
+ return MediaDocumentKind::Image;
+ }
+
+ nsresult Init() override;
+
+ nsresult StartDocumentLoad(const char* aCommand, nsIChannel* aChannel,
+ nsILoadGroup* aLoadGroup, nsISupports* aContainer,
+ nsIStreamListener** aDocListener,
+ bool aReset = true) override;
+
+ void SetScriptGlobalObject(nsIScriptGlobalObject*) override;
+ void Destroy() override;
+ void OnPageShow(bool aPersisted, EventTarget* aDispatchStartTarget,
+ bool aOnlySystemGroup = false) override;
+
+ NS_DECL_IMGINOTIFICATIONOBSERVER
+
+ // nsIDOMEventListener
+ NS_DECL_NSIDOMEVENTLISTENER
+
+ NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(ImageDocument, MediaDocument)
+
+ friend class ImageListener;
+
+ void DefaultCheckOverflowing();
+
+ // WebIDL API
+ JSObject* WrapNode(JSContext*, JS::Handle<JSObject*> aGivenProto) override;
+
+ bool ImageIsOverflowing() const {
+ return ImageIsOverflowingHorizontally() || ImageIsOverflowingVertically();
+ }
+
+ bool ImageIsOverflowingVertically() const {
+ return mImageHeight > mVisibleHeight;
+ }
+
+ bool ImageIsOverflowingHorizontally() const {
+ return mImageWidth > mVisibleWidth;
+ }
+
+ bool ImageIsResized() const { return mImageIsResized; }
+ // ShrinkToFit is called from xpidl methods and we don't have a good
+ // way to mark those MOZ_CAN_RUN_SCRIPT yet.
+ MOZ_CAN_RUN_SCRIPT_BOUNDARY void ShrinkToFit();
+ void RestoreImage();
+
+ void NotifyPossibleTitleChange(bool aBoundTitleElement) override;
+
+ void UpdateRemoteStyle(StyleImageRendering aImageRendering);
+
+ protected:
+ virtual ~ImageDocument();
+
+ nsresult CreateSyntheticDocument() override;
+
+ nsresult CheckOverflowing(bool changeState);
+
+ void UpdateTitleAndCharset();
+
+ void ScrollImageTo(int32_t aX, int32_t aY);
+
+ float GetRatio() const {
+ return std::min(mVisibleWidth / mImageWidth, mVisibleHeight / mImageHeight);
+ }
+
+ void ResetZoomLevel();
+ float GetZoomLevel();
+ void CheckFullZoom();
+ float GetResolution();
+
+ void UpdateSizeFromLayout();
+
+ enum eModeClasses {
+ eNone,
+ eShrinkToFit,
+ eOverflowingVertical, // And maybe horizontal too.
+ eOverflowingHorizontalOnly,
+ eIsInObjectOrEmbed
+ };
+ void SetModeClass(eModeClasses mode);
+
+ void OnSizeAvailable(imgIRequest* aRequest, imgIContainer* aImage);
+ void OnLoadComplete(imgIRequest* aRequest, nsresult aStatus);
+ void OnHasTransparency();
+
+ void MaybeSendResultToEmbedder(nsresult aResult);
+
+ RefPtr<HTMLImageElement> mImageContent;
+
+ float mVisibleWidth;
+ float mVisibleHeight;
+ int32_t mImageWidth;
+ int32_t mImageHeight;
+
+ // 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;
+ bool mTitleUpdateInProgress;
+ bool mHasCustomTitle;
+
+ // True iff embedder is either <object> or <embed>.
+ bool mIsInObjectOrEmbed;
+
+ float mOriginalZoomLevel;
+ float mOriginalResolution;
+};
+
+inline ImageDocument* Document::AsImageDocument() {
+ MOZ_ASSERT(IsImageDocument());
+ return static_cast<ImageDocument*>(this);
+}
+
+inline const ImageDocument* Document::AsImageDocument() const {
+ MOZ_ASSERT(IsImageDocument());
+ return static_cast<const ImageDocument*>(this);
+}
+
+} // namespace mozilla::dom
+
+#endif /* mozilla_dom_ImageDocument_h */