Add m-esr52 at 52.6.0

1 files changed, 828 insertions, 0 deletions

diff --git a/accessible/xul/XULListboxAccessible.cpp b/accessible/xul/XULListboxAccessible.cpp
new file mode 100644
index 000000000..52c3ddf0f
--- /dev/null
+++ b/accessible/xul/XULListboxAccessible.cpp
@@ -0,0 +1,828 @@
+/* -*- Mode: C++; tab-width: 4; 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 "XULListboxAccessible.h"
+
+#include "Accessible-inl.h"
+#include "nsAccessibilityService.h"
+#include "nsAccUtils.h"
+#include "DocAccessible.h"
+#include "Role.h"
+#include "States.h"
+
+#include "nsComponentManagerUtils.h"
+#include "nsIAutoCompleteInput.h"
+#include "nsIAutoCompletePopup.h"
+#include "nsIDOMXULMenuListElement.h"
+#include "nsIDOMXULMultSelectCntrlEl.h"
+#include "nsIDOMNodeList.h"
+#include "nsIDOMXULPopupElement.h"
+#include "nsIDOMXULSelectCntrlItemEl.h"
+#include "nsIMutableArray.h"
+#include "nsIPersistentProperties2.h"
+
+using namespace mozilla::a11y;
+
+////////////////////////////////////////////////////////////////////////////////
+// XULColumAccessible
+////////////////////////////////////////////////////////////////////////////////
+
+XULColumAccessible::
+  XULColumAccessible(nsIContent* aContent, DocAccessible* aDoc) :
+  AccessibleWrap(aContent, aDoc)
+{
+}
+
+role
+XULColumAccessible::NativeRole()
+{
+  return roles::LIST;
+}
+
+uint64_t
+XULColumAccessible::NativeState()
+{
+  return states::READONLY;
+}
+
+
+////////////////////////////////////////////////////////////////////////////////
+// XULColumnItemAccessible
+////////////////////////////////////////////////////////////////////////////////
+
+XULColumnItemAccessible::
+  XULColumnItemAccessible(nsIContent* aContent, DocAccessible* aDoc) :
+  LeafAccessible(aContent, aDoc)
+{
+}
+
+role
+XULColumnItemAccessible::NativeRole()
+{
+  return roles::COLUMNHEADER;
+}
+
+uint64_t
+XULColumnItemAccessible::NativeState()
+{
+  return states::READONLY;
+}
+
+uint8_t
+XULColumnItemAccessible::ActionCount()
+{
+  return 1;
+}
+
+void
+XULColumnItemAccessible::ActionNameAt(uint8_t aIndex, nsAString& aName)
+{
+  if (aIndex == eAction_Click)
+    aName.AssignLiteral("click");
+}
+
+bool
+XULColumnItemAccessible::DoAction(uint8_t aIndex)
+{
+  if (aIndex != eAction_Click)
+    return false;
+
+  DoCommand();
+  return true;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// XULListboxAccessible
+////////////////////////////////////////////////////////////////////////////////
+
+XULListboxAccessible::
+  XULListboxAccessible(nsIContent* aContent, DocAccessible* aDoc) :
+  XULSelectControlAccessible(aContent, aDoc)
+{
+  nsIContent* parentContent = mContent->GetFlattenedTreeParent();
+  if (parentContent) {
+    nsCOMPtr<nsIAutoCompletePopup> autoCompletePopupElm =
+      do_QueryInterface(parentContent);
+    if (autoCompletePopupElm)
+      mGenericTypes |= eAutoCompletePopup;
+  }
+
+  if (IsMulticolumn())
+    mGenericTypes |= eTable;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// XULListboxAccessible: Accessible
+
+uint64_t
+XULListboxAccessible::NativeState()
+{
+  // As a XULListboxAccessible we can have the following states:
+  //   FOCUSED, READONLY, FOCUSABLE
+
+  // Get focus status from base class
+  uint64_t states = Accessible::NativeState();
+
+  // see if we are multiple select if so set ourselves as such
+
+  if (mContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::seltype,
+                            nsGkAtoms::multiple, eCaseMatters)) {
+      states |= states::MULTISELECTABLE | states::EXTSELECTABLE;
+  }
+
+  return states;
+}
+
+/**
+  * Our value is the label of our ( first ) selected child.
+  */
+void
+XULListboxAccessible::Value(nsString& aValue)
+{
+  aValue.Truncate();
+
+  nsCOMPtr<nsIDOMXULSelectControlElement> select(do_QueryInterface(mContent));
+  if (select) {
+    nsCOMPtr<nsIDOMXULSelectControlItemElement> selectedItem;
+    select->GetSelectedItem(getter_AddRefs(selectedItem));
+    if (selectedItem)
+      selectedItem->GetLabel(aValue);
+  }
+}
+
+role
+XULListboxAccessible::NativeRole()
+{
+  // A richlistbox is used with the new autocomplete URL bar, and has a parent
+  // popup <panel>.
+  nsCOMPtr<nsIDOMXULPopupElement> xulPopup =
+    do_QueryInterface(mContent->GetParent());
+  if (xulPopup)
+    return roles::COMBOBOX_LIST;
+
+  return IsMulticolumn() ? roles::TABLE : roles::LISTBOX;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// XULListboxAccessible: Table
+
+uint32_t
+XULListboxAccessible::ColCount()
+{
+  nsIContent* headContent = nullptr;
+  for (nsIContent* childContent = mContent->GetFirstChild(); childContent;
+       childContent = childContent->GetNextSibling()) {
+    if (childContent->NodeInfo()->Equals(nsGkAtoms::listcols,
+                                         kNameSpaceID_XUL)) {
+      headContent = childContent;
+    }
+  }
+  if (!headContent)
+    return 0;
+
+  uint32_t columnCount = 0;
+  for (nsIContent* childContent = headContent->GetFirstChild(); childContent;
+       childContent = childContent->GetNextSibling()) {
+    if (childContent->NodeInfo()->Equals(nsGkAtoms::listcol,
+                                         kNameSpaceID_XUL)) {
+      columnCount++;
+    }
+  }
+
+  return columnCount;
+}
+
+uint32_t
+XULListboxAccessible::RowCount()
+{
+  nsCOMPtr<nsIDOMXULSelectControlElement> element(do_QueryInterface(mContent));
+
+  uint32_t itemCount = 0;
+  if(element)
+    element->GetItemCount(&itemCount);
+
+  return itemCount;
+}
+
+Accessible*
+XULListboxAccessible::CellAt(uint32_t aRowIndex, uint32_t aColumnIndex)
+{
+  nsCOMPtr<nsIDOMXULSelectControlElement> control =
+    do_QueryInterface(mContent);
+  NS_ENSURE_TRUE(control, nullptr);
+
+  nsCOMPtr<nsIDOMXULSelectControlItemElement> item;
+  control->GetItemAtIndex(aRowIndex, getter_AddRefs(item));
+  if (!item)
+    return nullptr;
+
+  nsCOMPtr<nsIContent> itemContent(do_QueryInterface(item));
+  if (!itemContent)
+    return nullptr;
+
+  Accessible* row = mDoc->GetAccessible(itemContent);
+  NS_ENSURE_TRUE(row, nullptr);
+
+  return row->GetChildAt(aColumnIndex);
+}
+
+bool
+XULListboxAccessible::IsColSelected(uint32_t aColIdx)
+{
+  nsCOMPtr<nsIDOMXULMultiSelectControlElement> control =
+    do_QueryInterface(mContent);
+  NS_ASSERTION(control,
+               "Doesn't implement nsIDOMXULMultiSelectControlElement.");
+
+  int32_t selectedrowCount = 0;
+  nsresult rv = control->GetSelectedCount(&selectedrowCount);
+  NS_ENSURE_SUCCESS(rv, false);
+
+  return selectedrowCount == static_cast<int32_t>(RowCount());
+}
+
+bool
+XULListboxAccessible::IsRowSelected(uint32_t aRowIdx)
+{
+  nsCOMPtr<nsIDOMXULSelectControlElement> control =
+    do_QueryInterface(mContent);
+  NS_ASSERTION(control,
+               "Doesn't implement nsIDOMXULSelectControlElement.");
+
+  nsCOMPtr<nsIDOMXULSelectControlItemElement> item;
+  nsresult rv = control->GetItemAtIndex(aRowIdx, getter_AddRefs(item));
+  NS_ENSURE_SUCCESS(rv, false);
+
+  bool isSelected = false;
+  item->GetSelected(&isSelected);
+  return isSelected;
+}
+
+bool
+XULListboxAccessible::IsCellSelected(uint32_t aRowIdx, uint32_t aColIdx)
+{
+  return IsRowSelected(aRowIdx);
+}
+
+uint32_t
+XULListboxAccessible::SelectedCellCount()
+{
+  nsCOMPtr<nsIDOMXULMultiSelectControlElement> control =
+    do_QueryInterface(mContent);
+  NS_ASSERTION(control,
+               "Doesn't implement nsIDOMXULMultiSelectControlElement.");
+
+  nsCOMPtr<nsIDOMNodeList> selectedItems;
+  control->GetSelectedItems(getter_AddRefs(selectedItems));
+  if (!selectedItems)
+    return 0;
+
+  uint32_t selectedItemsCount = 0;
+  nsresult rv = selectedItems->GetLength(&selectedItemsCount);
+  NS_ENSURE_SUCCESS(rv, 0);
+
+  return selectedItemsCount * ColCount();
+}
+
+uint32_t
+XULListboxAccessible::SelectedColCount()
+{
+  nsCOMPtr<nsIDOMXULMultiSelectControlElement> control =
+    do_QueryInterface(mContent);
+  NS_ASSERTION(control,
+               "Doesn't implement nsIDOMXULMultiSelectControlElement.");
+
+  int32_t selectedRowCount = 0;
+  nsresult rv = control->GetSelectedCount(&selectedRowCount);
+  NS_ENSURE_SUCCESS(rv, 0);
+
+  return selectedRowCount > 0 &&
+   selectedRowCount == static_cast<int32_t>(RowCount()) ? ColCount() : 0;
+}
+
+uint32_t
+XULListboxAccessible::SelectedRowCount()
+{
+  nsCOMPtr<nsIDOMXULMultiSelectControlElement> control =
+    do_QueryInterface(mContent);
+  NS_ASSERTION(control,
+               "Doesn't implement nsIDOMXULMultiSelectControlElement.");
+
+  int32_t selectedRowCount = 0;
+  nsresult rv = control->GetSelectedCount(&selectedRowCount);
+  NS_ENSURE_SUCCESS(rv, 0);
+
+  return selectedRowCount >= 0 ? selectedRowCount : 0;
+}
+
+void
+XULListboxAccessible::SelectedCells(nsTArray<Accessible*>* aCells)
+{
+  nsCOMPtr<nsIDOMXULMultiSelectControlElement> control =
+    do_QueryInterface(mContent);
+  NS_ASSERTION(control,
+               "Doesn't implement nsIDOMXULMultiSelectControlElement.");
+
+  nsCOMPtr<nsIDOMNodeList> selectedItems;
+  control->GetSelectedItems(getter_AddRefs(selectedItems));
+  if (!selectedItems)
+    return;
+
+  uint32_t selectedItemsCount = 0;
+  DebugOnly<nsresult> rv = selectedItems->GetLength(&selectedItemsCount);
+  NS_ASSERTION(NS_SUCCEEDED(rv), "GetLength() Shouldn't fail!");
+
+  for (uint32_t index = 0; index < selectedItemsCount; index++) {
+    nsCOMPtr<nsIDOMNode> itemNode;
+    selectedItems->Item(index, getter_AddRefs(itemNode));
+    nsCOMPtr<nsIContent> itemContent(do_QueryInterface(itemNode));
+    Accessible* item = mDoc->GetAccessible(itemContent);
+
+    if (item) {
+      uint32_t cellCount = item->ChildCount();
+      for (uint32_t cellIdx = 0; cellIdx < cellCount; cellIdx++) {
+        Accessible* cell = mChildren[cellIdx];
+        if (cell->Role() == roles::CELL)
+          aCells->AppendElement(cell);
+      }
+    }
+  }
+}
+
+void
+XULListboxAccessible::SelectedCellIndices(nsTArray<uint32_t>* aCells)
+{
+  nsCOMPtr<nsIDOMXULMultiSelectControlElement> control =
+    do_QueryInterface(mContent);
+  NS_ASSERTION(control,
+               "Doesn't implement nsIDOMXULMultiSelectControlElement.");
+
+  nsCOMPtr<nsIDOMNodeList> selectedItems;
+  control->GetSelectedItems(getter_AddRefs(selectedItems));
+  if (!selectedItems)
+    return;
+
+  uint32_t selectedItemsCount = 0;
+  DebugOnly<nsresult> rv = selectedItems->GetLength(&selectedItemsCount);
+  NS_ASSERTION(NS_SUCCEEDED(rv), "GetLength() Shouldn't fail!");
+
+  uint32_t colCount = ColCount();
+  aCells->SetCapacity(selectedItemsCount * colCount);
+  aCells->AppendElements(selectedItemsCount * colCount);
+
+  for (uint32_t selItemsIdx = 0, cellsIdx = 0;
+       selItemsIdx < selectedItemsCount; selItemsIdx++) {
+
+    nsCOMPtr<nsIDOMNode> itemNode;
+    selectedItems->Item(selItemsIdx, getter_AddRefs(itemNode));
+    nsCOMPtr<nsIDOMXULSelectControlItemElement> item =
+      do_QueryInterface(itemNode);
+
+    if (item) {
+      int32_t itemIdx = -1;
+      control->GetIndexOfItem(item, &itemIdx);
+      if (itemIdx >= 0)
+        for (uint32_t colIdx = 0; colIdx < colCount; colIdx++, cellsIdx++)
+          aCells->ElementAt(cellsIdx) = itemIdx * colCount + colIdx;
+    }
+  }
+}
+
+void
+XULListboxAccessible::SelectedColIndices(nsTArray<uint32_t>* aCols)
+{
+  uint32_t selColCount = SelectedColCount();
+  aCols->SetCapacity(selColCount);
+
+  for (uint32_t colIdx = 0; colIdx < selColCount; colIdx++)
+    aCols->AppendElement(colIdx);
+}
+
+void
+XULListboxAccessible::SelectedRowIndices(nsTArray<uint32_t>* aRows)
+{
+  nsCOMPtr<nsIDOMXULMultiSelectControlElement> control =
+    do_QueryInterface(mContent);
+  NS_ASSERTION(control,
+               "Doesn't implement nsIDOMXULMultiSelectControlElement.");
+
+  nsCOMPtr<nsIDOMNodeList> selectedItems;
+  control->GetSelectedItems(getter_AddRefs(selectedItems));
+  if (!selectedItems)
+    return;
+
+  uint32_t rowCount = 0;
+  DebugOnly<nsresult> rv = selectedItems->GetLength(&rowCount);
+  NS_ASSERTION(NS_SUCCEEDED(rv), "GetLength() Shouldn't fail!");
+
+  if (!rowCount)
+    return;
+
+  aRows->SetCapacity(rowCount);
+  aRows->AppendElements(rowCount);
+
+  for (uint32_t rowIdx = 0; rowIdx < rowCount; rowIdx++) {
+    nsCOMPtr<nsIDOMNode> itemNode;
+    selectedItems->Item(rowIdx, getter_AddRefs(itemNode));
+    nsCOMPtr<nsIDOMXULSelectControlItemElement> item =
+      do_QueryInterface(itemNode);
+
+    if (item) {
+      int32_t itemIdx = -1;
+      control->GetIndexOfItem(item, &itemIdx);
+      if (itemIdx >= 0)
+        aRows->ElementAt(rowIdx) = itemIdx;
+    }
+  }
+}
+
+void
+XULListboxAccessible::SelectRow(uint32_t aRowIdx)
+{
+  nsCOMPtr<nsIDOMXULMultiSelectControlElement> control =
+    do_QueryInterface(mContent);
+  NS_ASSERTION(control,
+               "Doesn't implement nsIDOMXULMultiSelectControlElement.");
+
+  nsCOMPtr<nsIDOMXULSelectControlItemElement> item;
+  control->GetItemAtIndex(aRowIdx, getter_AddRefs(item));
+  control->SelectItem(item);
+}
+
+void
+XULListboxAccessible::UnselectRow(uint32_t aRowIdx)
+{
+  nsCOMPtr<nsIDOMXULMultiSelectControlElement> control =
+    do_QueryInterface(mContent);
+  NS_ASSERTION(control,
+               "Doesn't implement nsIDOMXULMultiSelectControlElement.");
+
+  nsCOMPtr<nsIDOMXULSelectControlItemElement> item;
+  control->GetItemAtIndex(aRowIdx, getter_AddRefs(item));
+  control->RemoveItemFromSelection(item);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// XULListboxAccessible: Widgets
+
+bool
+XULListboxAccessible::IsWidget() const
+{
+  return true;
+}
+
+bool
+XULListboxAccessible::IsActiveWidget() const
+{
+  if (IsAutoCompletePopup()) {
+    nsCOMPtr<nsIAutoCompletePopup> autoCompletePopupElm =
+      do_QueryInterface(mContent->GetParent());
+
+    if (autoCompletePopupElm) {
+      bool isOpen = false;
+      autoCompletePopupElm->GetPopupOpen(&isOpen);
+      return isOpen;
+    }
+  }
+  return FocusMgr()->HasDOMFocus(mContent);
+}
+
+bool
+XULListboxAccessible::AreItemsOperable() const
+{
+  if (IsAutoCompletePopup()) {
+    nsCOMPtr<nsIAutoCompletePopup> autoCompletePopupElm =
+      do_QueryInterface(mContent->GetParent());
+
+    if (autoCompletePopupElm) {
+      bool isOpen = false;
+      autoCompletePopupElm->GetPopupOpen(&isOpen);
+      return isOpen;
+    }
+  }
+  return true;
+}
+
+Accessible*
+XULListboxAccessible::ContainerWidget() const
+{
+  if (IsAutoCompletePopup()) {
+    // This works for XUL autocompletes. It doesn't work for HTML forms
+    // autocomplete because of potential crossprocess calls (when autocomplete
+    // lives in content process while popup lives in chrome process). If that's
+    // a problem then rethink Widgets interface.
+    nsCOMPtr<nsIDOMXULMenuListElement> menuListElm =
+      do_QueryInterface(mContent->GetParent());
+    if (menuListElm) {
+      nsCOMPtr<nsIDOMNode> inputElm;
+      menuListElm->GetInputField(getter_AddRefs(inputElm));
+      if (inputElm) {
+        nsCOMPtr<nsINode> inputNode = do_QueryInterface(inputElm);
+        if (inputNode) {
+          Accessible* input =
+            mDoc->GetAccessible(inputNode);
+          return input ? input->ContainerWidget() : nullptr;
+        }
+      }
+    }
+  }
+  return nullptr;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// XULListitemAccessible
+////////////////////////////////////////////////////////////////////////////////
+
+XULListitemAccessible::
+  XULListitemAccessible(nsIContent* aContent, DocAccessible* aDoc) :
+  XULMenuitemAccessible(aContent, aDoc)
+{
+  mIsCheckbox = mContent->AttrValueIs(kNameSpaceID_None,
+                                      nsGkAtoms::type,
+                                      nsGkAtoms::checkbox,
+                                      eCaseMatters);
+  mType = eXULListItemType;
+
+  // Walk XBL anonymous children for list items. Overrides the flag value from
+  // base XULMenuitemAccessible class.
+  mStateFlags &= ~eNoXBLKids;
+}
+
+XULListitemAccessible::~XULListitemAccessible()
+{
+}
+
+NS_IMPL_ISUPPORTS_INHERITED0(XULListitemAccessible, Accessible)
+
+Accessible*
+XULListitemAccessible::GetListAccessible() const
+{
+  if (IsDefunct())
+    return nullptr;
+
+  nsCOMPtr<nsIDOMXULSelectControlItemElement> listItem =
+    do_QueryInterface(mContent);
+  if (!listItem)
+    return nullptr;
+
+  nsCOMPtr<nsIDOMXULSelectControlElement> list;
+  listItem->GetControl(getter_AddRefs(list));
+
+  nsCOMPtr<nsIContent> listContent(do_QueryInterface(list));
+  if (!listContent)
+    return nullptr;
+
+  return mDoc->GetAccessible(listContent);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// XULListitemAccessible Accessible
+
+void
+XULListitemAccessible::Description(nsString& aDesc)
+{
+  AccessibleWrap::Description(aDesc);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// XULListitemAccessible: Accessible
+
+/**
+  * If there is a Listcell as a child ( not anonymous ) use it, otherwise
+  *   default to getting the name from GetXULName
+  */
+ENameValueFlag
+XULListitemAccessible::NativeName(nsString& aName)
+{
+  nsIContent* childContent = mContent->GetFirstChild();
+  if (childContent) {
+    if (childContent->NodeInfo()->Equals(nsGkAtoms::listcell,
+                                         kNameSpaceID_XUL)) {
+      childContent->GetAttr(kNameSpaceID_None, nsGkAtoms::label, aName);
+      return eNameOK;
+    }
+  }
+
+  return Accessible::NativeName(aName);
+}
+
+role
+XULListitemAccessible::NativeRole()
+{
+  Accessible* list = GetListAccessible();
+  if (!list) {
+    NS_ERROR("No list accessible for listitem accessible!");
+    return roles::NOTHING;
+  }
+
+  if (list->Role() == roles::TABLE)
+    return roles::ROW;
+
+  if (mIsCheckbox)
+    return roles::CHECK_RICH_OPTION;
+
+  if (mParent && mParent->Role() == roles::COMBOBOX_LIST)
+    return roles::COMBOBOX_OPTION;
+
+  return roles::RICH_OPTION;
+}
+
+uint64_t
+XULListitemAccessible::NativeState()
+{
+  if (mIsCheckbox)
+    return XULMenuitemAccessible::NativeState();
+
+  uint64_t states = NativeInteractiveState();
+
+  nsCOMPtr<nsIDOMXULSelectControlItemElement> listItem =
+    do_QueryInterface(mContent);
+
+  if (listItem) {
+    bool isSelected;
+    listItem->GetSelected(&isSelected);
+    if (isSelected)
+      states |= states::SELECTED;
+
+    if (FocusMgr()->IsFocused(this))
+      states |= states::FOCUSED;
+  }
+
+  return states;
+}
+
+uint64_t
+XULListitemAccessible::NativeInteractiveState() const
+{
+  return NativelyUnavailable() || (mParent && mParent->NativelyUnavailable()) ?
+    states::UNAVAILABLE : states::FOCUSABLE | states::SELECTABLE;
+}
+
+void
+XULListitemAccessible::ActionNameAt(uint8_t aIndex, nsAString& aName)
+{
+  if (aIndex == eAction_Click && mIsCheckbox) {
+    uint64_t states = NativeState();
+    if (states & states::CHECKED)
+      aName.AssignLiteral("uncheck");
+    else
+      aName.AssignLiteral("check");
+  }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// XULListitemAccessible: Widgets
+
+Accessible*
+XULListitemAccessible::ContainerWidget() const
+{
+  return Parent();
+}
+
+
+////////////////////////////////////////////////////////////////////////////////
+// XULListCellAccessible
+////////////////////////////////////////////////////////////////////////////////
+
+XULListCellAccessible::
+  XULListCellAccessible(nsIContent* aContent, DocAccessible* aDoc) :
+  HyperTextAccessibleWrap(aContent, aDoc)
+{
+  mGenericTypes |= eTableCell;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// nsISupports
+
+NS_IMPL_ISUPPORTS_INHERITED0(XULListCellAccessible,
+                             HyperTextAccessible)
+
+////////////////////////////////////////////////////////////////////////////////
+// XULListCellAccessible: TableCell
+
+TableAccessible*
+XULListCellAccessible::Table() const
+{
+  Accessible* thisRow = Parent();
+  if (!thisRow || thisRow->Role() != roles::ROW)
+    return nullptr;
+
+  Accessible* table = thisRow->Parent();
+  if (!table || table->Role() != roles::TABLE)
+    return nullptr;
+
+  return table->AsTable();
+}
+
+uint32_t
+XULListCellAccessible::ColIdx() const
+{
+  Accessible* row = Parent();
+  if (!row)
+    return 0;
+
+  int32_t indexInRow = IndexInParent();
+  uint32_t colIdx = 0;
+  for (int32_t idx = 0; idx < indexInRow; idx++) {
+    Accessible* cell = row->GetChildAt(idx);
+    roles::Role role = cell->Role();
+    if (role == roles::CELL || role == roles::GRID_CELL ||
+        role == roles::ROWHEADER || role == roles::COLUMNHEADER)
+      colIdx++;
+  }
+
+  return colIdx;
+}
+
+uint32_t
+XULListCellAccessible::RowIdx() const
+{
+  Accessible* row = Parent();
+  if (!row)
+    return 0;
+
+  Accessible* table = row->Parent();
+  if (!table)
+    return 0;
+
+  int32_t indexInTable = row->IndexInParent();
+  uint32_t rowIdx = 0;
+  for (int32_t idx = 0; idx < indexInTable; idx++) {
+    row = table->GetChildAt(idx);
+    if (row->Role() == roles::ROW)
+      rowIdx++;
+  }
+
+  return rowIdx;
+}
+
+void
+XULListCellAccessible::ColHeaderCells(nsTArray<Accessible*>* aCells)
+{
+  TableAccessible* table = Table();
+  NS_ASSERTION(table, "cell not in a table!");
+  if (!table)
+    return;
+
+  // Get column header cell from XUL listhead.
+  Accessible* list = nullptr;
+
+  Accessible* tableAcc = table->AsAccessible();
+  uint32_t tableChildCount = tableAcc->ChildCount();
+  for (uint32_t childIdx = 0; childIdx < tableChildCount; childIdx++) {
+    Accessible* child = tableAcc->GetChildAt(childIdx);
+    if (child->Role() == roles::LIST) {
+      list = child;
+      break;
+    }
+  }
+
+  if (list) {
+    Accessible* headerCell = list->GetChildAt(ColIdx());
+    if (headerCell) {
+      aCells->AppendElement(headerCell);
+      return;
+    }
+  }
+
+  // No column header cell from XUL markup, try to get it from ARIA markup.
+  TableCellAccessible::ColHeaderCells(aCells);
+}
+
+bool
+XULListCellAccessible::Selected()
+{
+  TableAccessible* table = Table();
+  NS_ENSURE_TRUE(table, false); // we expect to be in a listbox (table)
+
+  return table->IsRowSelected(RowIdx());
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// XULListCellAccessible. Accessible implementation
+
+role
+XULListCellAccessible::NativeRole()
+{
+  return roles::CELL;
+}
+
+already_AddRefed<nsIPersistentProperties>
+XULListCellAccessible::NativeAttributes()
+{
+  nsCOMPtr<nsIPersistentProperties> attributes =
+    HyperTextAccessibleWrap::NativeAttributes();
+
+  // "table-cell-index" attribute
+  TableAccessible* table = Table();
+  if (!table) // we expect to be in a listbox (table)
+    return attributes.forget();
+
+  nsAutoString stringIdx;
+  stringIdx.AppendInt(table->CellIndexAt(RowIdx(), ColIdx()));
+  nsAccUtils::SetAccAttr(attributes, nsGkAtoms::tableCellIndex, stringIdx);
+
+  return attributes.forget();
+}