The Tor Browser: accessible/src/xul/XULElementAccessibles.cpp@6474c204b198 (annotated)

accessible/src/xul/XULElementAccessibles.cpp@6474c204b198 (annotated)

accessible/src/xul/XULElementAccessibles.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* -*- 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 "XULElementAccessibles.h"
 #include "Accessible-inl.h"
 #include "BaseAccessibles.h"
 #include "DocAccessible-inl.h"
 #include "nsAccUtils.h"
 #include "nsCoreUtils.h"
 #include "nsTextEquivUtils.h"
 #include "Relation.h"
 #include "Role.h"
 #include "States.h"
 #include "TextUpdater.h"
 #ifdef A11Y_LOG
 #include "Logging.h"
 #endif
 #include "nsIAccessibleRelation.h"
 #include "nsIDOMXULDescriptionElement.h"
 #include "nsNameSpaceManager.h"
 #include "nsNetUtil.h"
 #include "nsString.h"
 #include "nsTextBoxFrame.h"
 using namespace mozilla::a11y;
 ////////////////////////////////////////////////////////////////////////////////
 // XULLabelAccessible
 ////////////////////////////////////////////////////////////////////////////////
 XULLabelAccessible::
   XULLabelAccessible(nsIContent* aContent, DocAccessible* aDoc) :
   HyperTextAccessibleWrap(aContent, aDoc)
 {
   mType = eXULLabelType;
   // If @value attribute is given then it's rendered instead text content. In
   // this case we need to create a text leaf accessible to make @value attribute
   // accessible.
   // XXX: text interface doesn't let you get the text by words.
   nsTextBoxFrame* textBoxFrame = do_QueryFrame(mContent->GetPrimaryFrame());
   if (textBoxFrame) {
     mValueTextLeaf = new XULLabelTextLeafAccessible(mContent, mDoc);
     mDoc->BindToDocument(mValueTextLeaf, nullptr);
     nsAutoString text;
     textBoxFrame->GetCroppedTitle(text);
     mValueTextLeaf->SetText(text);
   }
 }
 void
 XULLabelAccessible::Shutdown()
 {
   mValueTextLeaf = nullptr;
   HyperTextAccessibleWrap::Shutdown();
 }
 ENameValueFlag
 XULLabelAccessible::NativeName(nsString& aName)
 {
   // if the value attr doesn't exist, the screen reader must get the accessible text
   // from the accessible text interface or from the children
   if (mValueTextLeaf)
     return mValueTextLeaf->Name(aName);
   return eNameOK;
 }
 role
 XULLabelAccessible::NativeRole()
 {
   return roles::LABEL;
 }
 uint64_t
 XULLabelAccessible::NativeState()
 {
   // Labels and description have read only state
   // They are not focusable or selectable
   return HyperTextAccessibleWrap::NativeState() | states::READONLY;
 }
 Relation
 XULLabelAccessible::RelationByType(RelationType aType)
 {
   Relation rel = HyperTextAccessibleWrap::RelationByType(aType);
   if (aType == RelationType::LABEL_FOR) {
     // Caption is the label for groupbox
     nsIContent* parent = mContent->GetFlattenedTreeParent();
     if (parent && parent->Tag() == nsGkAtoms::caption) {
       Accessible* parent = Parent();
       if (parent && parent->Role() == roles::GROUPING)
         rel.AppendTarget(parent);
     }
   }
   return rel;
 }
 void
 XULLabelAccessible::UpdateLabelValue(const nsString& aValue)
 {
 #ifdef A11Y_LOG
   if (logging::IsEnabled(logging::eText)) {
     logging::MsgBegin("TEXT", "text may be changed (xul:label @value update)");
     logging::Node("container", mContent);
     logging::MsgEntry("old text '%s'",
                       NS_ConvertUTF16toUTF8(mValueTextLeaf->Text()).get());
     logging::MsgEntry("new text: '%s'",
                       NS_ConvertUTF16toUTF8(aValue).get());
     logging::MsgEnd();
   }
 #endif
   TextUpdater::Run(mDoc, mValueTextLeaf, aValue);
 }
 void
 XULLabelAccessible::CacheChildren()
 {
   if (mValueTextLeaf) {
     AppendChild(mValueTextLeaf);
     return;
   }
   // Cache children from subtree.
   AccessibleWrap::CacheChildren();
 }
 ////////////////////////////////////////////////////////////////////////////////
 // XULLabelTextLeafAccessible
 ////////////////////////////////////////////////////////////////////////////////
 role
 XULLabelTextLeafAccessible::NativeRole()
 {
   return roles::TEXT_LEAF;
 }
 uint64_t
 XULLabelTextLeafAccessible::NativeState()
 {
   return TextLeafAccessibleWrap::NativeState() | states::READONLY;
 }
 ////////////////////////////////////////////////////////////////////////////////
 // XULTooltipAccessible
 ////////////////////////////////////////////////////////////////////////////////
 XULTooltipAccessible::
   XULTooltipAccessible(nsIContent* aContent, DocAccessible* aDoc) :
   LeafAccessible(aContent, aDoc)
 {
 }
 uint64_t
 XULTooltipAccessible::NativeState()
 {
   return LeafAccessible::NativeState() | states::READONLY;
 }
 role
 XULTooltipAccessible::NativeRole()
 {
   return roles::TOOLTIP;
 }
 ////////////////////////////////////////////////////////////////////////////////
 // XULLinkAccessible
 ////////////////////////////////////////////////////////////////////////////////
 XULLinkAccessible::
   XULLinkAccessible(nsIContent* aContent, DocAccessible* aDoc) :
   XULLabelAccessible(aContent, aDoc)
 {
 }
 // Expose nsIAccessibleHyperLink unconditionally
 NS_IMPL_ISUPPORTS_INHERITED(XULLinkAccessible, XULLabelAccessible,
                             nsIAccessibleHyperLink)
 ////////////////////////////////////////////////////////////////////////////////
 // XULLinkAccessible. nsIAccessible
 void
 XULLinkAccessible::Value(nsString& aValue)
 {
   aValue.Truncate();
   mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::href, aValue);
 }
 ENameValueFlag
 XULLinkAccessible::NativeName(nsString& aName)
 {
   mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::value, aName);
   if (!aName.IsEmpty())
     return eNameOK;
   nsTextEquivUtils::GetNameFromSubtree(this, aName);
   return aName.IsEmpty() ? eNameOK : eNameFromSubtree;
 }
 role
 XULLinkAccessible::NativeRole()
 {
   return roles::LINK;
 }
 uint64_t
 XULLinkAccessible::NativeLinkState() const
 {
   return states::LINKED;
 }
 uint8_t
 XULLinkAccessible::ActionCount()
 {
   return 1;
 }
 NS_IMETHODIMP
 XULLinkAccessible::GetActionName(uint8_t aIndex, nsAString& aName)
 {
   aName.Truncate();
   if (aIndex != eAction_Jump)
     return NS_ERROR_INVALID_ARG;
   aName.AssignLiteral("jump");
   return NS_OK;
 }
 NS_IMETHODIMP
 XULLinkAccessible::DoAction(uint8_t aIndex)
 {
   if (aIndex != eAction_Jump)
     return NS_ERROR_INVALID_ARG;
   if (IsDefunct())
     return NS_ERROR_FAILURE;
   DoCommand();
   return NS_OK;
 }
 ////////////////////////////////////////////////////////////////////////////////
 // XULLinkAccessible: HyperLinkAccessible
 bool
 XULLinkAccessible::IsLink()
 {
   // Expose HyperLinkAccessible unconditionally.
   return true;
 }
 uint32_t
 XULLinkAccessible::StartOffset()
 {
   // If XUL link accessible is not contained by hypertext accessible then
   // start offset matches index in parent because the parent doesn't contains
   // a text.
   // XXX: accessible parent of XUL link accessible should be a hypertext
   // accessible.
   if (Accessible::IsLink())
     return Accessible::StartOffset();
   return IndexInParent();
 }
 uint32_t
 XULLinkAccessible::EndOffset()
 {
   if (Accessible::IsLink())
     return Accessible::EndOffset();
   return IndexInParent() + 1;
 }
 already_AddRefed<nsIURI>
 XULLinkAccessible::AnchorURIAt(uint32_t aAnchorIndex)
 {
   if (aAnchorIndex != 0)
     return nullptr;
   nsAutoString href;
   mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::href, href);
   nsCOMPtr<nsIURI> baseURI = mContent->GetBaseURI();
   nsIDocument* document = mContent->OwnerDoc();
   nsCOMPtr<nsIURI> anchorURI;
   NS_NewURI(getter_AddRefs(anchorURI), href,
             document->GetDocumentCharacterSet().get(),
             baseURI);
   return anchorURI.forget();
 }

The Tor Browser / annotate

accessible/src/xul/XULElementAccessibles.cpp@6474c204b198 (annotated)

accessible/src/xul/XULElementAccessibles.cpp