The Tor Browser: layout/xul/nsXULTooltipListener.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 nsXULTooltipListener_h__

     7 #define nsXULTooltipListener_h__

     9 #include "nsIDOMEventListener.h"

    10 #include "nsIDOMMouseEvent.h"

    11 #include "nsIDOMElement.h"

    12 #include "nsITimer.h"

    13 #include "nsCOMPtr.h"

    14 #include "nsString.h"

    15 #ifdef MOZ_XUL

    16 #include "nsITreeBoxObject.h"

    17 #include "nsITreeColumns.h"

    18 #endif

    19 #include "nsWeakPtr.h"

    20 #include "mozilla/Attributes.h"

    22 class nsIContent;

    24 class nsXULTooltipListener MOZ_FINAL : public nsIDOMEventListener

    25 {

    26 public:

    27   NS_DECL_ISUPPORTS

    28   NS_DECL_NSIDOMEVENTLISTENER

    30   void MouseOut(nsIDOMEvent* aEvent);

    31   void MouseMove(nsIDOMEvent* aEvent);

    33   nsresult AddTooltipSupport(nsIContent* aNode);

    34   nsresult RemoveTooltipSupport(nsIContent* aNode);

    35   static nsXULTooltipListener* GetInstance() {

    36     if (!mInstance)

    37       mInstance = new nsXULTooltipListener();

    38     return mInstance;

    39   }

    40   static void ClearTooltipCache() { mInstance = nullptr; }

    42 protected:

    44   nsXULTooltipListener();

    45   ~nsXULTooltipListener();

    47   // pref callback for when the "show tooltips" pref changes

    48   static bool sShowTooltips;

    49   static uint32_t sTooltipListenerCount;

    51   void KillTooltipTimer();

    53 #ifdef MOZ_XUL

    54   void CheckTreeBodyMove(nsIDOMMouseEvent* aMouseEvent);

    55   nsresult GetSourceTreeBoxObject(nsITreeBoxObject** aBoxObject);

    56 #endif

    58   nsresult ShowTooltip();

    59   void LaunchTooltip();

    60   nsresult HideTooltip();

    61   nsresult DestroyTooltip();

    62   // This method tries to find a tooltip for aTarget.

    63   nsresult FindTooltip(nsIContent* aTarget, nsIContent** aTooltip);

    64   // This method calls FindTooltip and checks that the tooltip

    65   // can be really used (i.e. tooltip is not a menu).

    66   nsresult GetTooltipFor(nsIContent* aTarget, nsIContent** aTooltip);

    68   static nsXULTooltipListener* mInstance;

    69   static void ToolbarTipsPrefChanged(const char *aPref, void *aClosure);

    71   nsWeakPtr mSourceNode;

    72   nsWeakPtr mTargetNode;

    73   nsWeakPtr mCurrentTooltip;

    75   // a timer for showing the tooltip

    76   nsCOMPtr<nsITimer> mTooltipTimer;

    77   static void sTooltipCallback (nsITimer* aTimer, void* aListener);

    79   // screen coordinates of the last mousemove event, stored so that the

    80   // tooltip can be opened at this location.

    81   int32_t mMouseScreenX, mMouseScreenY;

    83   // various constants for tooltips

    84   enum {

    85     kTooltipMouseMoveTolerance = 7     // 7 pixel tolerance for mousemove event

    86   };

    88   // flag specifying if the tooltip has already been displayed by a MouseMove

    89   // event. The flag is reset on MouseOut so that the tooltip will display

    90   // the next time the mouse enters the node (bug #395668).

    91   bool mTooltipShownOnce;

    93 #ifdef MOZ_XUL

    94   // special members for handling trees

    95   bool mIsSourceTree;

    96   bool mNeedTitletip;

    97   int32_t mLastTreeRow;

    98   nsCOMPtr<nsITreeColumn> mLastTreeCol;

    99 #endif

   100 };

   102 #endif // nsXULTooltipListener

The Tor Browser / file revision

layout/xul/nsXULTooltipListener.h@97036ab72558

layout/xul/nsXULTooltipListener.h