The Tor Browser: dom/events/PaintRequest.h@97036ab72558

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #ifndef mozilla_dom_PaintRequest_h_

     7 #define mozilla_dom_PaintRequest_h_

     9 #include "nsIDOMPaintRequest.h"

    10 #include "nsPresContext.h"

    11 #include "nsIDOMEvent.h"

    12 #include "mozilla/Attributes.h"

    13 #include "nsWrapperCache.h"

    15 namespace mozilla {

    16 namespace dom {

    18 class DOMRect;

    20 class PaintRequest MOZ_FINAL : public nsIDOMPaintRequest

    21                              , public nsWrapperCache

    22 {

    23 public:

    24   PaintRequest(nsIDOMEvent* aParent)

    25     : mParent(aParent)

    26   {

    27     mRequest.mFlags = 0;

    28     SetIsDOMBinding();

    29   }

    31   NS_DECL_CYCLE_COLLECTING_ISUPPORTS

    32   NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(PaintRequest)

    33   NS_DECL_NSIDOMPAINTREQUEST

    35   virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;

    37   nsIDOMEvent* GetParentObject() const

    38   {

    39     return mParent;

    40   }

    42   already_AddRefed<DOMRect> ClientRect();

    43   void GetReason(nsAString& aResult) const

    44   {

    45     aResult.AssignLiteral("repaint");

    46   }

    48   void SetRequest(const nsInvalidateRequestList::Request& aRequest)

    49   { mRequest = aRequest; }

    51 private:

    52   ~PaintRequest() {}

    54   nsCOMPtr<nsIDOMEvent> mParent;

    55   nsInvalidateRequestList::Request mRequest;

    56 };

    58 class PaintRequestList MOZ_FINAL : public nsISupports,

    59                                    public nsWrapperCache

    60 {

    61 public:

    62   PaintRequestList(nsIDOMEvent *aParent) : mParent(aParent)

    63   {

    64     SetIsDOMBinding();

    65   }

    67   NS_DECL_CYCLE_COLLECTING_ISUPPORTS

    68   NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(PaintRequestList)

    70   virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;

    71   nsISupports* GetParentObject()

    72   {

    73     return mParent;

    74   }

    76   void Append(PaintRequest* aElement)

    77   {

    78     mArray.AppendElement(aElement);

    79   }

    81   uint32_t Length()

    82   {

    83     return mArray.Length();

    84   }

    86   PaintRequest* Item(uint32_t aIndex)

    87   {

    88     return mArray.SafeElementAt(aIndex);

    89   }

    90   PaintRequest* IndexedGetter(uint32_t aIndex, bool& aFound)

    91   {

    92     aFound = aIndex < mArray.Length();

    93     return aFound ? mArray.ElementAt(aIndex) : nullptr;

    94   }

    96 private:

    97   ~PaintRequestList() {}

    99   nsTArray< nsRefPtr<PaintRequest> > mArray;

   100   nsCOMPtr<nsIDOMEvent> mParent;

   101 };

   103 } // namespace dom

   104 } // namespace mozilla

   106 #endif // mozilla_dom_PaintRequest_h_

The Tor Browser / file revision

dom/events/PaintRequest.h@97036ab72558

dom/events/PaintRequest.h