The Tor Browser: accessible/src/xul/XULSliderAccessible.cpp@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 #include "XULSliderAccessible.h"

     8 #include "nsAccessibilityService.h"

     9 #include "Role.h"

    10 #include "States.h"

    12 #include "nsIFrame.h"

    13 #include "mozilla/dom/Element.h"

    14 #include "mozilla/FloatingPoint.h"

    16 using namespace mozilla::a11y;

    18 ////////////////////////////////////////////////////////////////////////////////

    19 // XULSliderAccessible

    20 ////////////////////////////////////////////////////////////////////////////////

    22 XULSliderAccessible::

    23   XULSliderAccessible(nsIContent* aContent, DocAccessible* aDoc) :

    24   AccessibleWrap(aContent, aDoc)

    25 {

    26   mStateFlags |= eHasNumericValue;

    27 }

    29 // Accessible

    31 role

    32 XULSliderAccessible::NativeRole()

    33 {

    34   return roles::SLIDER;

    35 }

    37 uint64_t

    38 XULSliderAccessible::NativeInteractiveState() const

    39  {

    40   if (NativelyUnavailable())

    41     return states::UNAVAILABLE;

    43   nsIContent* sliderElm = GetSliderElement();

    44   if (sliderElm) {

    45     nsIFrame* frame = sliderElm->GetPrimaryFrame();

    46     if (frame && frame->IsFocusable())

    47       return states::FOCUSABLE;

    48   }

    50   return 0;

    51 }

    53 bool

    54 XULSliderAccessible::NativelyUnavailable() const

    55 {

    56   return mContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::disabled,

    57                                nsGkAtoms::_true, eCaseMatters);

    58 }

    60 // nsIAccessible

    62 void

    63 XULSliderAccessible::Value(nsString& aValue)

    64 {

    65   GetSliderAttr(nsGkAtoms::curpos, aValue);

    66 }

    68 uint8_t

    69 XULSliderAccessible::ActionCount()

    70 {

    71   return 1;

    72 }

    74 NS_IMETHODIMP

    75 XULSliderAccessible::GetActionName(uint8_t aIndex, nsAString& aName)

    76 {

    77   aName.Truncate();

    79   NS_ENSURE_ARG(aIndex == 0);

    81   aName.AssignLiteral("activate");

    82   return NS_OK;

    83 }

    85 NS_IMETHODIMP

    86 XULSliderAccessible::DoAction(uint8_t aIndex)

    87 {

    88   NS_ENSURE_ARG(aIndex == 0);

    90   nsIContent* sliderElm = GetSliderElement();

    91   if (sliderElm)

    92     DoCommand(sliderElm);

    94   return NS_OK;

    95 }

    97 double

    98 XULSliderAccessible::MaxValue() const

    99 {

   100   double value = AccessibleWrap::MaxValue();

   101   return IsNaN(value) ? GetSliderAttr(nsGkAtoms::maxpos) : value;

   102 }

   104 double

   105 XULSliderAccessible::MinValue() const

   106 {

   107   double value = AccessibleWrap::MinValue();

   108   return IsNaN(value) ? GetSliderAttr(nsGkAtoms::minpos) : value;

   109 }

   111 double

   112 XULSliderAccessible::Step() const

   113 {

   114   double value = AccessibleWrap::Step();

   115   return IsNaN(value) ? GetSliderAttr(nsGkAtoms::increment) : value;

   116 }

   118 double

   119 XULSliderAccessible::CurValue() const

   120 {

   121   double value = AccessibleWrap::CurValue();

   122   return IsNaN(value) ? GetSliderAttr(nsGkAtoms::curpos) : value;

   123 }

   125 bool

   126 XULSliderAccessible::SetCurValue(double aValue)

   127 {

   128   if (AccessibleWrap::SetCurValue(aValue))

   129     return true;

   131   return SetSliderAttr(nsGkAtoms::curpos, aValue);

   132 }

   134 bool

   135 XULSliderAccessible::CanHaveAnonChildren()

   136 {

   137   // Do not allow anonymous xul:slider be accessible.

   138   return false;

   139 }

   141 // Utils

   143 nsIContent*

   144 XULSliderAccessible::GetSliderElement() const

   145 {

   146   if (!mSliderNode) {

   147     // XXX: we depend on anonymous content.

   148     mSliderNode = mContent->OwnerDoc()->

   149       GetAnonymousElementByAttribute(mContent, nsGkAtoms::anonid,

   150                                      NS_LITERAL_STRING("slider"));

   151   }

   153   return mSliderNode;

   154 }

   156 nsresult

   157 XULSliderAccessible::GetSliderAttr(nsIAtom* aName, nsAString& aValue) const

   158 {

   159   aValue.Truncate();

   161   if (IsDefunct())

   162     return NS_ERROR_FAILURE;

   164   nsIContent* sliderElm = GetSliderElement();

   165   if (sliderElm)

   166     sliderElm->GetAttr(kNameSpaceID_None, aName, aValue);

   168   return NS_OK;

   169 }

   171 nsresult

   172 XULSliderAccessible::SetSliderAttr(nsIAtom* aName, const nsAString& aValue)

   173 {

   174   if (IsDefunct())

   175     return NS_ERROR_FAILURE;

   177   nsIContent* sliderElm = GetSliderElement();

   178   if (sliderElm)

   179     sliderElm->SetAttr(kNameSpaceID_None, aName, aValue, true);

   181   return NS_OK;

   182 }

   184 double

   185 XULSliderAccessible::GetSliderAttr(nsIAtom* aName) const

   186 {

   187   nsAutoString attrValue;

   188   nsresult rv = GetSliderAttr(aName, attrValue);

   189   if (NS_FAILED(rv))

   190     return UnspecifiedNaN<double>();

   192   nsresult error = NS_OK;

   193   double value = attrValue.ToDouble(&error);

   194   return NS_FAILED(error) ? UnspecifiedNaN<double>() : value;

   195 }

   197 bool

   198 XULSliderAccessible::SetSliderAttr(nsIAtom* aName, double aValue)

   199 {

   200   nsAutoString value;

   201   value.AppendFloat(aValue);

   203   return NS_SUCCEEDED(SetSliderAttr(aName, value));

   204 }

   207 ////////////////////////////////////////////////////////////////////////////////

   208 // XULThumbAccessible

   209 ////////////////////////////////////////////////////////////////////////////////

   211 XULThumbAccessible::

   212   XULThumbAccessible(nsIContent* aContent, DocAccessible* aDoc) :

   213   AccessibleWrap(aContent, aDoc)

   214 {

   215 }

   217 ////////////////////////////////////////////////////////////////////////////////

   218 // XULThumbAccessible: Accessible

   220 role

   221 XULThumbAccessible::NativeRole()

   222 {

   223   return roles::INDICATOR;

   224 }

The Tor Browser / file revision

accessible/src/xul/XULSliderAccessible.cpp@97036ab72558

accessible/src/xul/XULSliderAccessible.cpp