The Tor Browser: layout/xul/nsScrollBoxFrame.cpp@7e26c7da4463

     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 #include "nsCOMPtr.h"

     7 #include "nsPresContext.h"

     8 #include "nsGkAtoms.h"

     9 #include "nsButtonBoxFrame.h"

    10 #include "nsITimer.h"

    11 #include "nsRepeatService.h"

    12 #include "mozilla/MouseEvents.h"

    13 #include "nsIContent.h"

    15 using namespace mozilla;

    17 class nsAutoRepeatBoxFrame : public nsButtonBoxFrame

    18 {

    19 public:

    20   NS_DECL_FRAMEARENA_HELPERS

    22   friend nsIFrame* NS_NewAutoRepeatBoxFrame(nsIPresShell* aPresShell,

    23                                             nsStyleContext* aContext);

    25   virtual void DestroyFrom(nsIFrame* aDestructRoot) MOZ_OVERRIDE;

    27   virtual nsresult AttributeChanged(int32_t aNameSpaceID,

    28                                     nsIAtom* aAttribute,

    29                                     int32_t aModType) MOZ_OVERRIDE;

    31   virtual nsresult HandleEvent(nsPresContext* aPresContext,

    32                                WidgetGUIEvent* aEvent,

    33                                nsEventStatus* aEventStatus) MOZ_OVERRIDE;

    35   NS_IMETHOD HandlePress(nsPresContext* aPresContext,

    36                          WidgetGUIEvent* aEvent,

    37                          nsEventStatus* aEventStatus) MOZ_OVERRIDE;

    39   NS_IMETHOD HandleRelease(nsPresContext* aPresContext,

    40                            WidgetGUIEvent* aEvent,

    41                            nsEventStatus* aEventStatus) MOZ_OVERRIDE;

    43 protected:

    44   nsAutoRepeatBoxFrame(nsIPresShell* aPresShell, nsStyleContext* aContext):

    45     nsButtonBoxFrame(aPresShell, aContext) {}

    47   void StartRepeat() {

    48     if (IsActivatedOnHover()) {

    49       // No initial delay on hover.

    50       nsRepeatService::GetInstance()->Start(Notify, this, 0);

    51     } else {

    52       nsRepeatService::GetInstance()->Start(Notify, this);

    53     }

    54   }

    55   void StopRepeat() {

    56     nsRepeatService::GetInstance()->Stop(Notify, this);

    57   }

    58   void Notify();

    59   static void Notify(void* aData) {

    60     static_cast<nsAutoRepeatBoxFrame*>(aData)->Notify();

    61   }

    63   bool mTrustedEvent;

    65   bool IsActivatedOnHover();

    66 };

    68 nsIFrame*

    69 NS_NewAutoRepeatBoxFrame (nsIPresShell* aPresShell, nsStyleContext* aContext)

    70 {

    71   return new (aPresShell) nsAutoRepeatBoxFrame (aPresShell, aContext);

    72 }

    74 NS_IMPL_FRAMEARENA_HELPERS(nsAutoRepeatBoxFrame)

    76 nsresult

    77 nsAutoRepeatBoxFrame::HandleEvent(nsPresContext* aPresContext,

    78                                   WidgetGUIEvent* aEvent,

    79                                   nsEventStatus* aEventStatus)

    80 {

    81   NS_ENSURE_ARG_POINTER(aEventStatus);

    82   if (nsEventStatus_eConsumeNoDefault == *aEventStatus) {

    83     return NS_OK;

    84   }

    86   switch(aEvent->message)

    87   {

    88     // repeat mode may be "hover" for repeating while the mouse is hovering

    89     // over the element, otherwise repetition is done while the element is

    90     // active (pressed).

    91     case NS_MOUSE_ENTER:

    92     case NS_MOUSE_ENTER_SYNTH:

    93       if (IsActivatedOnHover()) {

    94         StartRepeat();

    95         mTrustedEvent = aEvent->mFlags.mIsTrusted;

    96       }

    97       break;

    99     case NS_MOUSE_EXIT:

   100     case NS_MOUSE_EXIT_SYNTH:

   101       // always stop on mouse exit

   102       StopRepeat();

   103       // Not really necessary but do this to be safe

   104       mTrustedEvent = false;

   105       break;

   107     case NS_MOUSE_CLICK: {

   108       WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent();

   109       if (mouseEvent->IsLeftClickEvent()) {

   110         // skip button frame handling to prevent click handling

   111         return nsBoxFrame::HandleEvent(aPresContext, mouseEvent, aEventStatus);

   112       }

   113       break;

   114     }

   115   }

   117   return nsButtonBoxFrame::HandleEvent(aPresContext, aEvent, aEventStatus);

   118 }

   120 NS_IMETHODIMP

   121 nsAutoRepeatBoxFrame::HandlePress(nsPresContext* aPresContext,

   122                                   WidgetGUIEvent* aEvent,

   123                                   nsEventStatus* aEventStatus)

   124 {

   125   if (!IsActivatedOnHover()) {

   126     StartRepeat();

   127     mTrustedEvent = aEvent->mFlags.mIsTrusted;

   128     DoMouseClick(aEvent, mTrustedEvent);

   129   }

   131   return NS_OK;

   132 }

   134 NS_IMETHODIMP

   135 nsAutoRepeatBoxFrame::HandleRelease(nsPresContext* aPresContext,

   136                                     WidgetGUIEvent* aEvent,

   137                                     nsEventStatus* aEventStatus)

   138 {

   139   if (!IsActivatedOnHover()) {

   140     StopRepeat();

   141   }

   142   return NS_OK;

   143 }

   145 nsresult

   146 nsAutoRepeatBoxFrame::AttributeChanged(int32_t aNameSpaceID,

   147                                        nsIAtom* aAttribute,

   148                                        int32_t aModType)

   149 {

   150   if (aAttribute == nsGkAtoms::type) {

   151     StopRepeat();

   152   }

   153   return NS_OK;

   154 }

   156 void

   157 nsAutoRepeatBoxFrame::Notify()

   158 {

   159   DoMouseClick(nullptr, mTrustedEvent);

   160 }

   162 void

   163 nsAutoRepeatBoxFrame::DestroyFrom(nsIFrame* aDestructRoot)

   164 {

   165   // Ensure our repeat service isn't going... it's possible that a scrollbar can disappear out

   166   // from under you while you're in the process of scrolling.

   167   StopRepeat();

   168   nsButtonBoxFrame::DestroyFrom(aDestructRoot);

   169 }

   171 bool

   172 nsAutoRepeatBoxFrame::IsActivatedOnHover()

   173 {

   174   return mContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::repeat,

   175                                nsGkAtoms::hover, eCaseMatters);

   176 }

The Tor Browser / file revision