Add m-esr52 at 52.6.0

1 files changed, 810 insertions, 0 deletions

diff --git a/accessible/windows/ia2/ia2Accessible.cpp b/accessible/windows/ia2/ia2Accessible.cpp
new file mode 100644
index 000000000..c72719b51
--- /dev/null
+++ b/accessible/windows/ia2/ia2Accessible.cpp
@@ -0,0 +1,810 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* 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 "AccessibleWrap.h"
+
+#include "Accessible2_i.c"
+#include "Accessible2_2_i.c"
+#include "Accessible2_3_i.c"
+#include "AccessibleRole.h"
+#include "AccessibleStates.h"
+
+#include "Compatibility.h"
+#include "ia2AccessibleRelation.h"
+#include "IUnknownImpl.h"
+#include "nsCoreUtils.h"
+#include "nsIAccessibleTypes.h"
+#include "mozilla/a11y/PDocAccessible.h"
+#include "Relation.h"
+#include "TextRange-inl.h"
+#include "nsAccessibilityService.h"
+
+#include "nsIPersistentProperties2.h"
+#include "nsISimpleEnumerator.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+template<typename String> static void EscapeAttributeChars(String& aStr);
+
+////////////////////////////////////////////////////////////////////////////////
+// ia2Accessible
+////////////////////////////////////////////////////////////////////////////////
+
+STDMETHODIMP
+ia2Accessible::QueryInterface(REFIID iid, void** ppv)
+{
+  if (!ppv)
+    return E_INVALIDARG;
+
+  *ppv = nullptr;
+
+  if (IID_IAccessible2_3 == iid)
+    *ppv = static_cast<IAccessible2_3*>(this);
+  else if (IID_IAccessible2_2 == iid)
+    *ppv = static_cast<IAccessible2_2*>(this);
+  else if (IID_IAccessible2 == iid && !Compatibility::IsIA2Off())
+    *ppv = static_cast<IAccessible2*>(this);
+
+  if (*ppv) {
+    (reinterpret_cast<IUnknown*>(*ppv))->AddRef();
+    return S_OK;
+  }
+
+  return E_NOINTERFACE;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// IAccessible2
+
+STDMETHODIMP
+ia2Accessible::get_nRelations(long* aNRelations)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (!aNRelations)
+    return E_INVALIDARG;
+  *aNRelations = 0;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct())
+    return CO_E_OBJNOTCONNECTED;
+
+  MOZ_ASSERT(!acc->IsProxy());
+
+  for (uint32_t idx = 0; idx < ArrayLength(sRelationTypePairs); idx++) {
+    if (sRelationTypePairs[idx].second == IA2_RELATION_NULL)
+      continue;
+
+    Relation rel = acc->RelationByType(sRelationTypePairs[idx].first);
+    if (rel.Next())
+      (*aNRelations)++;
+  }
+  return S_OK;
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+ia2Accessible::get_relation(long aRelationIndex,
+                            IAccessibleRelation** aRelation)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (!aRelation || aRelationIndex < 0)
+    return E_INVALIDARG;
+  *aRelation = nullptr;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct())
+    return CO_E_OBJNOTCONNECTED;
+
+  MOZ_ASSERT(!acc->IsProxy());
+
+  long relIdx = 0;
+  for (uint32_t idx = 0; idx < ArrayLength(sRelationTypePairs); idx++) {
+    if (sRelationTypePairs[idx].second == IA2_RELATION_NULL)
+      continue;
+
+    RelationType relationType = sRelationTypePairs[idx].first;
+    Relation rel = acc->RelationByType(relationType);
+    RefPtr<ia2AccessibleRelation> ia2Relation =
+      new ia2AccessibleRelation(relationType, &rel);
+    if (ia2Relation->HasTargets()) {
+      if (relIdx == aRelationIndex) {
+        ia2Relation.forget(aRelation);
+        return S_OK;
+      }
+
+      relIdx++;
+    }
+  }
+
+  return E_INVALIDARG;
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+ia2Accessible::get_relations(long aMaxRelations,
+                             IAccessibleRelation** aRelation,
+                             long *aNRelations)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (!aRelation || !aNRelations || aMaxRelations <= 0)
+    return E_INVALIDARG;
+  *aNRelations = 0;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct())
+    return CO_E_OBJNOTCONNECTED;
+
+  MOZ_ASSERT(!acc->IsProxy());
+
+  for (uint32_t idx = 0; idx < ArrayLength(sRelationTypePairs) &&
+       *aNRelations < aMaxRelations; idx++) {
+    if (sRelationTypePairs[idx].second == IA2_RELATION_NULL)
+      continue;
+
+    RelationType relationType = sRelationTypePairs[idx].first;
+    Relation rel = acc->RelationByType(relationType);
+    RefPtr<ia2AccessibleRelation> ia2Rel =
+      new ia2AccessibleRelation(relationType, &rel);
+    if (ia2Rel->HasTargets()) {
+      ia2Rel.forget(aRelation + (*aNRelations));
+      (*aNRelations)++;
+    }
+  }
+  return S_OK;
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+ia2Accessible::role(long* aRole)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (!aRole)
+    return E_INVALIDARG;
+  *aRole = 0;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct())
+    return CO_E_OBJNOTCONNECTED;
+
+#define ROLE(_geckoRole, stringRole, atkRole, macRole, \
+             msaaRole, ia2Role, nameRule) \
+  case roles::_geckoRole: \
+    *aRole = ia2Role; \
+    break;
+
+  a11y::role geckoRole;
+  MOZ_ASSERT(!acc->IsProxy());
+  geckoRole = acc->Role();
+  switch (geckoRole) {
+#include "RoleMap.h"
+    default:
+      MOZ_CRASH("Unknown role.");
+  }
+
+#undef ROLE
+
+  // Special case, if there is a ROLE_ROW inside of a ROLE_TREE_TABLE, then call
+  // the IA2 role a ROLE_OUTLINEITEM.
+  MOZ_ASSERT(!acc->IsProxy());
+  if (geckoRole == roles::ROW) {
+    Accessible* xpParent = acc->Parent();
+    if (xpParent && xpParent->Role() == roles::TREE_TABLE)
+      *aRole = ROLE_SYSTEM_OUTLINEITEM;
+  }
+
+  return S_OK;
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+ia2Accessible::scrollTo(enum IA2ScrollType aScrollType)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct())
+    return CO_E_OBJNOTCONNECTED;
+
+  MOZ_ASSERT(!acc->IsProxy());
+  nsCoreUtils::ScrollTo(acc->Document()->PresShell(), acc->GetContent(),
+                        aScrollType);
+
+  return S_OK;
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+ia2Accessible::scrollToPoint(enum IA2CoordinateType aCoordType,
+                              long aX, long aY)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct())
+    return CO_E_OBJNOTCONNECTED;
+
+  uint32_t geckoCoordType = (aCoordType == IA2_COORDTYPE_SCREEN_RELATIVE) ?
+    nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE :
+    nsIAccessibleCoordinateType::COORDTYPE_PARENT_RELATIVE;
+
+  MOZ_ASSERT(!acc->IsProxy());
+  acc->ScrollToPoint(geckoCoordType, aX, aY);
+
+  return S_OK;
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+ia2Accessible::get_groupPosition(long* aGroupLevel,
+                                 long* aSimilarItemsInGroup,
+                                 long* aPositionInGroup)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (!aGroupLevel || !aSimilarItemsInGroup || !aPositionInGroup)
+    return E_INVALIDARG;
+
+  *aGroupLevel = 0;
+  *aSimilarItemsInGroup = 0;
+  *aPositionInGroup = 0;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct())
+    return CO_E_OBJNOTCONNECTED;
+
+  GroupPos groupPos = acc->GroupPosition();
+
+  // Group information for accessibles having level only (like html headings
+  // elements) isn't exposed by this method. AT should look for 'level' object
+  // attribute.
+  if (!groupPos.setSize && !groupPos.posInSet)
+    return S_FALSE;
+
+  *aGroupLevel = groupPos.level;
+  *aSimilarItemsInGroup = groupPos.setSize;
+  *aPositionInGroup = groupPos.posInSet;
+
+  return S_OK;
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+ia2Accessible::get_states(AccessibleStates* aStates)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (!aStates)
+    return E_INVALIDARG;
+  *aStates = 0;
+
+  // XXX: bug 344674 should come with better approach that we have here.
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct()) {
+    *aStates = IA2_STATE_DEFUNCT;
+    return S_OK;
+  }
+
+  uint64_t state;
+  MOZ_ASSERT(!acc->IsProxy());
+  state = acc->State();
+
+  if (state & states::INVALID)
+    *aStates |= IA2_STATE_INVALID_ENTRY;
+  if (state & states::REQUIRED)
+    *aStates |= IA2_STATE_REQUIRED;
+
+  // The following IA2 states are not supported by Gecko
+  // IA2_STATE_ARMED
+  // IA2_STATE_MANAGES_DESCENDANTS
+  // IA2_STATE_ICONIFIED
+  // IA2_STATE_INVALID // This is not a state, it is the absence of a state
+
+  if (state & states::ACTIVE)
+    *aStates |= IA2_STATE_ACTIVE;
+  if (state & states::DEFUNCT)
+    *aStates |= IA2_STATE_DEFUNCT;
+  if (state & states::EDITABLE)
+    *aStates |= IA2_STATE_EDITABLE;
+  if (state & states::HORIZONTAL)
+    *aStates |= IA2_STATE_HORIZONTAL;
+  if (state & states::MODAL)
+    *aStates |= IA2_STATE_MODAL;
+  if (state & states::MULTI_LINE)
+    *aStates |= IA2_STATE_MULTI_LINE;
+  if (state & states::OPAQUE1)
+    *aStates |= IA2_STATE_OPAQUE;
+  if (state & states::SELECTABLE_TEXT)
+    *aStates |= IA2_STATE_SELECTABLE_TEXT;
+  if (state & states::SINGLE_LINE)
+    *aStates |= IA2_STATE_SINGLE_LINE;
+  if (state & states::STALE)
+    *aStates |= IA2_STATE_STALE;
+  if (state & states::SUPPORTS_AUTOCOMPLETION)
+    *aStates |= IA2_STATE_SUPPORTS_AUTOCOMPLETION;
+  if (state & states::TRANSIENT)
+    *aStates |= IA2_STATE_TRANSIENT;
+  if (state & states::VERTICAL)
+    *aStates |= IA2_STATE_VERTICAL;
+  if (state & states::CHECKED)
+    *aStates |= IA2_STATE_CHECKABLE;
+  if (state & states::PINNED)
+    *aStates |= IA2_STATE_PINNED;
+
+  return S_OK;
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+ia2Accessible::get_extendedRole(BSTR* aExtendedRole)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (!aExtendedRole)
+    return E_INVALIDARG;
+
+  *aExtendedRole = nullptr;
+  return E_NOTIMPL;
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+ia2Accessible::get_localizedExtendedRole(BSTR* aLocalizedExtendedRole)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (!aLocalizedExtendedRole)
+    return E_INVALIDARG;
+
+  *aLocalizedExtendedRole = nullptr;
+  return E_NOTIMPL;
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+ia2Accessible::get_nExtendedStates(long* aNExtendedStates)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (!aNExtendedStates)
+    return E_INVALIDARG;
+
+  *aNExtendedStates = 0;
+  return E_NOTIMPL;
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+ia2Accessible::get_extendedStates(long aMaxExtendedStates,
+                                  BSTR** aExtendedStates,
+                                  long* aNExtendedStates)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (!aExtendedStates || !aNExtendedStates)
+    return E_INVALIDARG;
+
+  *aExtendedStates = nullptr;
+  *aNExtendedStates = 0;
+  return E_NOTIMPL;
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+ia2Accessible::get_localizedExtendedStates(long aMaxLocalizedExtendedStates,
+                                           BSTR** aLocalizedExtendedStates,
+                                           long* aNLocalizedExtendedStates)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (!aLocalizedExtendedStates || !aNLocalizedExtendedStates)
+    return E_INVALIDARG;
+
+  *aLocalizedExtendedStates = nullptr;
+  *aNLocalizedExtendedStates = 0;
+  return E_NOTIMPL;
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+ia2Accessible::get_uniqueID(long* aUniqueID)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (!aUniqueID)
+    return E_INVALIDARG;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  *aUniqueID = AccessibleWrap::GetChildIDFor(acc);
+  return S_OK;
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+ia2Accessible::get_windowHandle(HWND* aWindowHandle)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (!aWindowHandle)
+    return E_INVALIDARG;
+  *aWindowHandle = 0;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct())
+    return CO_E_OBJNOTCONNECTED;
+
+  *aWindowHandle = AccessibleWrap::GetHWNDFor(acc);
+  return S_OK;
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+ia2Accessible::get_indexInParent(long* aIndexInParent)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (!aIndexInParent)
+    return E_INVALIDARG;
+  *aIndexInParent = -1;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct())
+    return CO_E_OBJNOTCONNECTED;
+
+  MOZ_ASSERT(!acc->IsProxy());
+  *aIndexInParent = acc->IndexInParent();
+
+  if (*aIndexInParent == -1)
+    return S_FALSE;
+
+  return S_OK;
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+ia2Accessible::get_locale(IA2Locale* aLocale)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (!aLocale)
+    return E_INVALIDARG;
+
+  // Language codes consist of a primary code and a possibly empty series of
+  // subcodes: language-code = primary-code ( "-" subcode )*
+  // Two-letter primary codes are reserved for [ISO639] language abbreviations.
+  // Any two-letter subcode is understood to be a [ISO3166] country code.
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct())
+    return CO_E_OBJNOTCONNECTED;
+
+  nsAutoString lang;
+  acc->Language(lang);
+
+  // If primary code consists from two letters then expose it as language.
+  int32_t offset = lang.FindChar('-', 0);
+  if (offset == -1) {
+    if (lang.Length() == 2) {
+      aLocale->language = ::SysAllocString(lang.get());
+      return S_OK;
+    }
+  } else if (offset == 2) {
+    aLocale->language = ::SysAllocStringLen(lang.get(), 2);
+
+    // If the first subcode consists from two letters then expose it as
+    // country.
+    offset = lang.FindChar('-', 3);
+    if (offset == -1) {
+      if (lang.Length() == 5) {
+        aLocale->country = ::SysAllocString(lang.get() + 3);
+        return S_OK;
+      }
+    } else if (offset == 5) {
+      aLocale->country = ::SysAllocStringLen(lang.get() + 3, 2);
+    }
+  }
+
+  // Expose as a string if primary code or subcode cannot point to language or
+  // country abbreviations or if there are more than one subcode.
+  aLocale->variant = ::SysAllocString(lang.get());
+  return S_OK;
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+ia2Accessible::get_attributes(BSTR* aAttributes)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (!aAttributes)
+    return E_INVALIDARG;
+  *aAttributes = nullptr;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct())
+    return CO_E_OBJNOTCONNECTED;
+
+  // The format is name:value;name:value; with \ for escaping these
+  // characters ":;=,\".
+  if (!acc->IsProxy()) {
+    nsCOMPtr<nsIPersistentProperties> attributes = acc->Attributes();
+    return ConvertToIA2Attributes(attributes, aAttributes);
+  }
+
+  MOZ_ASSERT(!acc->IsProxy());
+  return E_UNEXPECTED;
+
+  A11Y_TRYBLOCK_END
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// IAccessible2_2
+
+STDMETHODIMP
+ia2Accessible::get_attribute(BSTR name, VARIANT* aAttribute)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (!aAttribute)
+    return E_INVALIDARG;
+
+  return E_NOTIMPL;
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+ia2Accessible::get_accessibleWithCaret(IUnknown** aAccessible,
+                                       long* aCaretOffset)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (!aAccessible || !aCaretOffset)
+    return E_INVALIDARG;
+
+  *aAccessible = nullptr;
+  *aCaretOffset = -1;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct())
+    return CO_E_OBJNOTCONNECTED;
+
+  int32_t caretOffset = -1;
+  Accessible* accWithCaret = SelectionMgr()->AccessibleWithCaret(&caretOffset);
+  if (acc->Document() != accWithCaret->Document())
+    return S_FALSE;
+
+  Accessible* child = accWithCaret;
+  while (!child->IsDoc() && child != acc)
+    child = child->Parent();
+
+  if (child != acc)
+    return S_FALSE;
+
+  *aAccessible =  static_cast<IAccessible2*>(
+    static_cast<AccessibleWrap*>(accWithCaret));
+  (*aAccessible)->AddRef();
+  *aCaretOffset = caretOffset;
+  return S_OK;
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+ia2Accessible::get_relationTargetsOfType(BSTR aType,
+                                         long aMaxTargets,
+                                         IUnknown*** aTargets,
+                                         long* aNTargets)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (!aTargets || !aNTargets || aMaxTargets < 0)
+    return E_INVALIDARG;
+  *aNTargets = 0;
+
+  Maybe<RelationType> relationType;
+  for (uint32_t idx = 0; idx < ArrayLength(sRelationTypePairs); idx++) {
+    if (wcscmp(aType, sRelationTypePairs[idx].second) == 0) {
+      relationType.emplace(sRelationTypePairs[idx].first);
+      break;
+    }
+  }
+  if (!relationType)
+    return E_INVALIDARG;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct())
+    return CO_E_OBJNOTCONNECTED;
+
+  nsTArray<Accessible*> targets;
+  MOZ_ASSERT(!acc->IsProxy());
+  Relation rel = acc->RelationByType(*relationType);
+  Accessible* target = nullptr;
+  while ((target = rel.Next()) &&
+         static_cast<long>(targets.Length()) <= aMaxTargets) {
+    targets.AppendElement(target);
+  }
+
+  *aNTargets = targets.Length();
+  *aTargets = static_cast<IUnknown**>(
+    ::CoTaskMemAlloc(sizeof(IUnknown*) * *aNTargets));
+  if (!*aTargets)
+    return E_OUTOFMEMORY;
+
+  for (int32_t i = 0; i < *aNTargets; i++) {
+    AccessibleWrap* target= static_cast<AccessibleWrap*>(targets[i]);
+    (*aTargets)[i] = static_cast<IAccessible2*>(target);
+    (*aTargets)[i]->AddRef();
+  }
+
+  return S_OK;
+
+  A11Y_TRYBLOCK_END
+}
+
+STDMETHODIMP
+ia2Accessible::get_selectionRanges(IA2Range** aRanges,
+                                   long *aNRanges)
+{
+  A11Y_TRYBLOCK_BEGIN
+
+  if (!aRanges || !aNRanges)
+    return E_INVALIDARG;
+
+  *aNRanges = 0;
+
+  AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
+  if (acc->IsDefunct())
+    return CO_E_OBJNOTCONNECTED;
+
+  AutoTArray<TextRange, 1> ranges;
+  acc->Document()->SelectionRanges(&ranges);
+  uint32_t len = ranges.Length();
+  for (uint32_t idx = 0; idx < len; idx++) {
+    if (!ranges[idx].Crop(acc)) {
+      ranges.RemoveElementAt(idx);
+    }
+  }
+
+  *aNRanges = ranges.Length();
+  *aRanges = static_cast<IA2Range*>(
+    ::CoTaskMemAlloc(sizeof(IA2Range) * *aNRanges));
+  if (!*aRanges)
+    return E_OUTOFMEMORY;
+
+  for (uint32_t idx = 0; idx < static_cast<uint32_t>(*aNRanges); idx++) {
+    AccessibleWrap* anchor =
+      static_cast<AccessibleWrap*>(ranges[idx].StartContainer());
+    (*aRanges)[idx].anchor = static_cast<IAccessible2*>(anchor);
+    anchor->AddRef();
+
+    (*aRanges)[idx].anchorOffset = ranges[idx].StartOffset();
+
+    AccessibleWrap* active =
+      static_cast<AccessibleWrap*>(ranges[idx].EndContainer());
+    (*aRanges)[idx].active = static_cast<IAccessible2*>(active);
+    active->AddRef();
+
+    (*aRanges)[idx].activeOffset = ranges[idx].EndOffset();
+  }
+
+  return S_OK;
+
+  A11Y_TRYBLOCK_END
+}
+
+
+////////////////////////////////////////////////////////////////////////////////
+// Helpers
+
+template<typename String>
+static inline void
+EscapeAttributeChars(String& aStr)
+{
+  int32_t offset = 0;
+  static const char kCharsToEscape[] = ":;=,\\";
+  while ((offset = aStr.FindCharInSet(kCharsToEscape, offset)) != kNotFound) {
+    aStr.Insert('\\', offset);
+    offset += 2;
+  }
+}
+
+HRESULT
+ia2Accessible::ConvertToIA2Attributes(nsTArray<Attribute>* aAttributes,
+                                      BSTR* aIA2Attributes)
+{
+  nsString attrStr;
+  size_t attrCount = aAttributes->Length();
+  for (size_t i = 0; i < attrCount; i++) {
+    EscapeAttributeChars(aAttributes->ElementAt(i).Name());
+    EscapeAttributeChars(aAttributes->ElementAt(i).Value());
+    AppendUTF8toUTF16(aAttributes->ElementAt(i).Name(), attrStr);
+    attrStr.Append(':');
+    attrStr.Append(aAttributes->ElementAt(i).Value());
+    attrStr.Append(';');
+  }
+
+  if (attrStr.IsEmpty())
+    return S_FALSE;
+
+  *aIA2Attributes = ::SysAllocStringLen(attrStr.get(), attrStr.Length());
+  return *aIA2Attributes ? S_OK : E_OUTOFMEMORY;
+}
+
+HRESULT
+ia2Accessible::ConvertToIA2Attributes(nsIPersistentProperties* aAttributes,
+                                      BSTR* aIA2Attributes)
+{
+  *aIA2Attributes = nullptr;
+
+  // The format is name:value;name:value; with \ for escaping these
+  // characters ":;=,\".
+
+  if (!aAttributes)
+    return S_FALSE;
+
+  nsCOMPtr<nsISimpleEnumerator> propEnum;
+  aAttributes->Enumerate(getter_AddRefs(propEnum));
+  if (!propEnum)
+    return E_FAIL;
+
+  nsAutoString strAttrs;
+
+  bool hasMore = false;
+  while (NS_SUCCEEDED(propEnum->HasMoreElements(&hasMore)) && hasMore) {
+    nsCOMPtr<nsISupports> propSupports;
+    propEnum->GetNext(getter_AddRefs(propSupports));
+
+    nsCOMPtr<nsIPropertyElement> propElem(do_QueryInterface(propSupports));
+    if (!propElem)
+      return E_FAIL;
+
+    nsAutoCString name;
+    if (NS_FAILED(propElem->GetKey(name)))
+      return E_FAIL;
+
+    EscapeAttributeChars(name);
+
+    nsAutoString value;
+    if (NS_FAILED(propElem->GetValue(value)))
+      return E_FAIL;
+
+    EscapeAttributeChars(value);
+
+    AppendUTF8toUTF16(name, strAttrs);
+    strAttrs.Append(':');
+    strAttrs.Append(value);
+    strAttrs.Append(';');
+  }
+
+  if (strAttrs.IsEmpty())
+    return S_FALSE;
+
+  *aIA2Attributes = ::SysAllocStringLen(strAttrs.get(), strAttrs.Length());
+  return *aIA2Attributes ? S_OK : E_OUTOFMEMORY;
+}