The Tor Browser: accessible/src/xul/XULSliderAccessible.cpp@b8a032363ba2 (annotated)

accessible/src/xul/XULSliderAccessible.cpp@b8a032363ba2 (annotated)

accessible/src/xul/XULSliderAccessible.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include "XULSliderAccessible.h"
 #include "nsAccessibilityService.h"
 #include "Role.h"
 #include "States.h"
 #include "nsIFrame.h"
 #include "mozilla/dom/Element.h"
 #include "mozilla/FloatingPoint.h"
 using namespace mozilla::a11y;
 ////////////////////////////////////////////////////////////////////////////////
 // XULSliderAccessible
 ////////////////////////////////////////////////////////////////////////////////
 XULSliderAccessible::
   XULSliderAccessible(nsIContent* aContent, DocAccessible* aDoc) :
   AccessibleWrap(aContent, aDoc)
 {
   mStateFlags |= eHasNumericValue;
 }
 // Accessible
 role
 XULSliderAccessible::NativeRole()
 {
   return roles::SLIDER;
 }
 uint64_t
 XULSliderAccessible::NativeInteractiveState() const
  {
   if (NativelyUnavailable())
     return states::UNAVAILABLE;
   nsIContent* sliderElm = GetSliderElement();
   if (sliderElm) {
     nsIFrame* frame = sliderElm->GetPrimaryFrame();
     if (frame && frame->IsFocusable())
       return states::FOCUSABLE;
   }
   return 0;
 }
 bool
 XULSliderAccessible::NativelyUnavailable() const
 {
   return mContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::disabled,
                                nsGkAtoms::_true, eCaseMatters);
 }
 // nsIAccessible
 void
 XULSliderAccessible::Value(nsString& aValue)
 {
   GetSliderAttr(nsGkAtoms::curpos, aValue);
 }
 uint8_t
 XULSliderAccessible::ActionCount()
 {
   return 1;
 }
 NS_IMETHODIMP
 XULSliderAccessible::GetActionName(uint8_t aIndex, nsAString& aName)
 {
   aName.Truncate();
   NS_ENSURE_ARG(aIndex == 0);
   aName.AssignLiteral("activate");
   return NS_OK;
 }
 NS_IMETHODIMP
 XULSliderAccessible::DoAction(uint8_t aIndex)
 {
   NS_ENSURE_ARG(aIndex == 0);
   nsIContent* sliderElm = GetSliderElement();
   if (sliderElm)
     DoCommand(sliderElm);
   return NS_OK;
 }
 double
 XULSliderAccessible::MaxValue() const
 {
   double value = AccessibleWrap::MaxValue();
   return IsNaN(value) ? GetSliderAttr(nsGkAtoms::maxpos) : value;
 }
 double
 XULSliderAccessible::MinValue() const
 {
   double value = AccessibleWrap::MinValue();
   return IsNaN(value) ? GetSliderAttr(nsGkAtoms::minpos) : value;
 }
 double
 XULSliderAccessible::Step() const
 {
   double value = AccessibleWrap::Step();
   return IsNaN(value) ? GetSliderAttr(nsGkAtoms::increment) : value;
 }
 double
 XULSliderAccessible::CurValue() const
 {
   double value = AccessibleWrap::CurValue();
   return IsNaN(value) ? GetSliderAttr(nsGkAtoms::curpos) : value;
 }
 bool
 XULSliderAccessible::SetCurValue(double aValue)
 {
   if (AccessibleWrap::SetCurValue(aValue))
     return true;
   return SetSliderAttr(nsGkAtoms::curpos, aValue);
 }
 bool
 XULSliderAccessible::CanHaveAnonChildren()
 {
   // Do not allow anonymous xul:slider be accessible.
   return false;
 }
 // Utils
 nsIContent*
 XULSliderAccessible::GetSliderElement() const
 {
   if (!mSliderNode) {
     // XXX: we depend on anonymous content.
     mSliderNode = mContent->OwnerDoc()->
       GetAnonymousElementByAttribute(mContent, nsGkAtoms::anonid,
                                      NS_LITERAL_STRING("slider"));
   }
   return mSliderNode;
 }
 nsresult
 XULSliderAccessible::GetSliderAttr(nsIAtom* aName, nsAString& aValue) const
 {
   aValue.Truncate();
   if (IsDefunct())
     return NS_ERROR_FAILURE;
   nsIContent* sliderElm = GetSliderElement();
   if (sliderElm)
     sliderElm->GetAttr(kNameSpaceID_None, aName, aValue);
   return NS_OK;
 }
 nsresult
 XULSliderAccessible::SetSliderAttr(nsIAtom* aName, const nsAString& aValue)
 {
   if (IsDefunct())
     return NS_ERROR_FAILURE;
   nsIContent* sliderElm = GetSliderElement();
   if (sliderElm)
     sliderElm->SetAttr(kNameSpaceID_None, aName, aValue, true);
   return NS_OK;
 }
 double
 XULSliderAccessible::GetSliderAttr(nsIAtom* aName) const
 {
   nsAutoString attrValue;
   nsresult rv = GetSliderAttr(aName, attrValue);
   if (NS_FAILED(rv))
     return UnspecifiedNaN<double>();
   nsresult error = NS_OK;
   double value = attrValue.ToDouble(&error);
   return NS_FAILED(error) ? UnspecifiedNaN<double>() : value;
 }
 bool
 XULSliderAccessible::SetSliderAttr(nsIAtom* aName, double aValue)
 {
   nsAutoString value;
   value.AppendFloat(aValue);
   return NS_SUCCEEDED(SetSliderAttr(aName, value));
 }
 ////////////////////////////////////////////////////////////////////////////////
 // XULThumbAccessible
 ////////////////////////////////////////////////////////////////////////////////
 XULThumbAccessible::
   XULThumbAccessible(nsIContent* aContent, DocAccessible* aDoc) :
   AccessibleWrap(aContent, aDoc)
 {
 }
 ////////////////////////////////////////////////////////////////////////////////
 // XULThumbAccessible: Accessible
 role
 XULThumbAccessible::NativeRole()
 {
   return roles::INDICATOR;
 }

The Tor Browser / annotate

accessible/src/xul/XULSliderAccessible.cpp@b8a032363ba2 (annotated)

accessible/src/xul/XULSliderAccessible.cpp