The Tor Browser / file comparison
comparison: layout/style/ImageLoader.h
layout/style/ImageLoader.h
- branch
- TOR_BUG_9701
- changeset 14
- 925c144e1f1f
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| -1:000000000000 | 0:56d6c22fa30c |
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| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this file, | |
| 3 * You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 // A class that handles style system image loads (other image loads are handled | |
| 6 // by the nodes in the content tree). | |
| 7 | |
| 8 #ifndef mozilla_css_ImageLoader_h___ | |
| 9 #define mozilla_css_ImageLoader_h___ | |
| 10 | |
| 11 #include "nsClassHashtable.h" | |
| 12 #include "nsHashKeys.h" | |
| 13 #include "nsCSSValue.h" | |
| 14 #include "imgIRequest.h" | |
| 15 #include "imgIOnloadBlocker.h" | |
| 16 #include "imgINotificationObserver.h" | |
| 17 #include "mozilla/Attributes.h" | |
| 18 | |
| 19 class nsIFrame; | |
| 20 class nsIDocument; | |
| 21 class nsPresContext; | |
| 22 class nsIURI; | |
| 23 class nsIPrincipal; | |
| 24 | |
| 25 namespace mozilla { | |
| 26 namespace css { | |
| 27 | |
| 28 class ImageLoader MOZ_FINAL : public imgINotificationObserver, | |
| 29 public imgIOnloadBlocker { | |
| 30 public: | |
| 31 typedef mozilla::css::ImageValue Image; | |
| 32 | |
| 33 ImageLoader(nsIDocument* aDocument) | |
| 34 : mDocument(aDocument), | |
| 35 mInClone(false) | |
| 36 { | |
| 37 MOZ_ASSERT(mDocument); | |
| 38 } | |
| 39 | |
| 40 NS_DECL_ISUPPORTS | |
| 41 NS_DECL_IMGIONLOADBLOCKER | |
| 42 NS_DECL_IMGINOTIFICATIONOBSERVER | |
| 43 | |
| 44 void DropDocumentReference(); | |
| 45 | |
| 46 void MaybeRegisterCSSImage(Image* aImage); | |
| 47 void DeregisterCSSImage(Image* aImage); | |
| 48 | |
| 49 void AssociateRequestToFrame(imgIRequest* aRequest, | |
| 50 nsIFrame* aFrame); | |
| 51 | |
| 52 void DisassociateRequestFromFrame(imgIRequest* aRequest, | |
| 53 nsIFrame* aFrame); | |
| 54 | |
| 55 void DropRequestsForFrame(nsIFrame* aFrame); | |
| 56 | |
| 57 void SetAnimationMode(uint16_t aMode); | |
| 58 | |
| 59 void ClearFrames(); | |
| 60 | |
| 61 void LoadImage(nsIURI* aURI, nsIPrincipal* aPrincipal, nsIURI* aReferrer, | |
| 62 Image* aCSSValue); | |
| 63 | |
| 64 void DestroyRequest(imgIRequest* aRequest); | |
| 65 | |
| 66 private: | |
| 67 // We need to be able to look up the frames associated with a request (for | |
| 68 // delivering notifications) and the requests associated with a frame (when | |
| 69 // the frame goes away). Thus we maintain hashtables going both ways. These | |
| 70 // should always be in sync. | |
| 71 | |
| 72 typedef nsTArray<nsIFrame*> FrameSet; | |
| 73 typedef nsTArray<nsCOMPtr<imgIRequest> > RequestSet; | |
| 74 typedef nsTHashtable<nsPtrHashKey<Image> > ImageHashSet; | |
| 75 typedef nsClassHashtable<nsISupportsHashKey, | |
| 76 FrameSet> RequestToFrameMap; | |
| 77 typedef nsClassHashtable<nsPtrHashKey<nsIFrame>, | |
| 78 RequestSet> FrameToRequestMap; | |
| 79 | |
| 80 void AddImage(Image* aCSSImage); | |
| 81 void RemoveImage(Image* aCSSImage); | |
| 82 | |
| 83 nsPresContext* GetPresContext(); | |
| 84 | |
| 85 void DoRedraw(FrameSet* aFrameSet); | |
| 86 | |
| 87 static PLDHashOperator | |
| 88 SetAnimationModeEnumerator(nsISupports* aKey, FrameSet* aValue, | |
| 89 void* aClosure); | |
| 90 | |
| 91 nsresult OnStartContainer(imgIRequest *aRequest, imgIContainer* aImage); | |
| 92 nsresult OnStopFrame(imgIRequest *aRequest); | |
| 93 nsresult OnImageIsAnimated(imgIRequest *aRequest); | |
| 94 nsresult FrameChanged(imgIRequest* aRequest); | |
| 95 // Do not override OnDataAvailable since background images are not | |
| 96 // displayed incrementally; they are displayed after the entire image | |
| 97 // has been loaded. | |
| 98 | |
| 99 // A map of imgIRequests to the nsIFrames that are using them. | |
| 100 RequestToFrameMap mRequestToFrameMap; | |
| 101 | |
| 102 // A map of nsIFrames to the imgIRequests they use. | |
| 103 FrameToRequestMap mFrameToRequestMap; | |
| 104 | |
| 105 // A weak pointer to our document. Nulled out by DropDocumentReference. | |
| 106 nsIDocument* mDocument; | |
| 107 | |
| 108 // The set of all nsCSSValue::Images (whether they're associated a frame or | |
| 109 // not). We'll need this when we go away to remove any requests associated | |
| 110 // with our document from those Images. | |
| 111 ImageHashSet mImages; | |
| 112 | |
| 113 // Are we cloning? If so, ignore any notifications we get. | |
| 114 bool mInClone; | |
| 115 }; | |
| 116 | |
| 117 } // namespace css | |
| 118 } // namespace mozilla | |
| 119 | |
| 120 #endif /* mozilla_css_ImageLoader_h___ */ |
