The Tor Browser: dom/events/IMEContentObserver.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 /* vim: set ts=2 sw=2 et tw=80: */

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

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

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

     7 #ifndef mozilla_IMEContentObserver_h_

     8 #define mozilla_IMEContentObserver_h_

    10 #include "mozilla/Attributes.h"

    11 #include "nsCOMPtr.h"

    12 #include "nsCycleCollectionParticipant.h"

    13 #include "nsIDocShell.h" // XXX Why does only this need to be included here?

    14 #include "nsIReflowObserver.h"

    15 #include "nsISelectionListener.h"

    16 #include "nsIScrollObserver.h"

    17 #include "nsIWidget.h" // for nsIMEUpdatePreference

    18 #include "nsStubMutationObserver.h"

    19 #include "nsWeakReference.h"

    21 class nsIContent;

    22 class nsINode;

    23 class nsISelection;

    24 class nsPresContext;

    26 namespace mozilla {

    28 class EventStateManager;

    30 // IMEContentObserver notifies widget of any text and selection changes

    31 // in the currently focused editor

    32 class IMEContentObserver MOZ_FINAL : public nsISelectionListener,

    33                                      public nsStubMutationObserver,

    34                                      public nsIReflowObserver,

    35                                      public nsIScrollObserver,

    36                                      public nsSupportsWeakReference

    37 {

    38 public:

    39   IMEContentObserver();

    41   NS_DECL_CYCLE_COLLECTING_ISUPPORTS

    42   NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(IMEContentObserver,

    43                                            nsISelectionListener)

    44   NS_DECL_NSISELECTIONLISTENER

    45   NS_DECL_NSIMUTATIONOBSERVER_CHARACTERDATACHANGED

    46   NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED

    47   NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED

    48   NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED

    49   NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTEWILLCHANGE

    50   NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED

    51   NS_DECL_NSIREFLOWOBSERVER

    53   // nsIScrollObserver

    54   virtual void ScrollPositionChanged() MOZ_OVERRIDE;

    56   void Init(nsIWidget* aWidget, nsPresContext* aPresContext,

    57             nsIContent* aContent);

    58   void Destroy();

    59   /**

    60    * IMEContentObserver is stored by EventStateManager during observing.

    61    * DisconnectFromEventStateManager() is called when EventStateManager stops

    62    * storing the instance.

    63    */

    64   void DisconnectFromEventStateManager();

    65   bool IsManaging(nsPresContext* aPresContext, nsIContent* aContent);

    66   bool IsEditorHandlingEventForComposition() const;

    67   bool KeepAliveDuringDeactive() const

    68   {

    69     return mUpdatePreference.WantDuringDeactive();

    70   }

    71   nsIWidget* GetWidget() const { return mWidget; }

    72   nsresult GetSelectionAndRoot(nsISelection** aSelection,

    73                                nsIContent** aRoot) const;

    75 private:

    76   void NotifyContentAdded(nsINode* aContainer, int32_t aStart, int32_t aEnd);

    77   void ObserveEditableNode();

    79   nsCOMPtr<nsIWidget> mWidget;

    80   nsCOMPtr<nsISelection> mSelection;

    81   nsCOMPtr<nsIContent> mRootContent;

    82   nsCOMPtr<nsINode> mEditableNode;

    83   nsCOMPtr<nsIDocShell> mDocShell;

    85   EventStateManager* mESM;

    87   nsIMEUpdatePreference mUpdatePreference;

    88   uint32_t mPreAttrChangeLength;

    89 };

    91 } // namespace mozilla

    93 #endif // mozilla_IMEContentObserver_h_

The Tor Browser / file revision

dom/events/IMEContentObserver.h@97036ab72558

dom/events/IMEContentObserver.h