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

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

accessible/src/xul/XULTreeGridAccessible.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 "XULTreeGridAccessibleWrap.h"
 #include "nsAccCache.h"
 #include "nsAccessibilityService.h"
 #include "nsAccUtils.h"
 #include "DocAccessible.h"
 #include "nsEventShell.h"
 #include "Relation.h"
 #include "Role.h"
 #include "States.h"
 #include "nsIBoxObject.h"
 #include "nsIMutableArray.h"
 #include "nsIPersistentProperties2.h"
 #include "nsITreeSelection.h"
 #include "nsComponentManagerUtils.h"
 using namespace mozilla::a11y;
 ////////////////////////////////////////////////////////////////////////////////
 // XULTreeGridAccessible: nsISupports implementation
 NS_IMPL_ISUPPORTS_INHERITED(XULTreeGridAccessible,
                             XULTreeAccessible,
                             nsIAccessibleTable)
 ////////////////////////////////////////////////////////////////////////////////
 // XULTreeGridAccessible: nsIAccessibleTable implementation
 uint32_t
 XULTreeGridAccessible::ColCount()
 {
   return nsCoreUtils::GetSensibleColumnCount(mTree);
 }
 uint32_t
 XULTreeGridAccessible::RowCount()
 {
   if (!mTreeView)
     return 0;
   int32_t rowCount = 0;
   mTreeView->GetRowCount(&rowCount);
   return rowCount >= 0 ? rowCount : 0;
 }
 uint32_t
 XULTreeGridAccessible::SelectedCellCount()
 {
   return SelectedRowCount() * ColCount();
 }
 uint32_t
 XULTreeGridAccessible::SelectedColCount()
 {
   // If all the row has been selected, then all the columns are selected,
   // because we can't select a column alone.
   uint32_t selectedRowCount = SelectedItemCount();
   return selectedRowCount > 0 && selectedRowCount == RowCount() ? ColCount() : 0;
 }
 uint32_t
 XULTreeGridAccessible::SelectedRowCount()
 {
   return SelectedItemCount();
 }
 void
 XULTreeGridAccessible::SelectedCells(nsTArray<Accessible*>* aCells)
 {
   uint32_t colCount = ColCount(), rowCount = RowCount();
   for (uint32_t rowIdx = 0; rowIdx < rowCount; rowIdx++) {
     if (IsRowSelected(rowIdx)) {
       for (uint32_t colIdx = 0; colIdx < colCount; colIdx++) {
         Accessible* cell = CellAt(rowIdx, colIdx);
         aCells->AppendElement(cell);
       }
     }
   }
 }
 void
 XULTreeGridAccessible::SelectedCellIndices(nsTArray<uint32_t>* aCells)
 {
   uint32_t colCount = ColCount(), rowCount = RowCount();
   for (uint32_t rowIdx = 0; rowIdx < rowCount; rowIdx++)
     if (IsRowSelected(rowIdx))
       for (uint32_t colIdx = 0; colIdx < colCount; colIdx++)
         aCells->AppendElement(rowIdx * colCount + colIdx);
 }
 void
 XULTreeGridAccessible::SelectedColIndices(nsTArray<uint32_t>* aCols)
 {
   if (RowCount() != SelectedRowCount())
     return;
   uint32_t colCount = ColCount();
   aCols->SetCapacity(colCount);
   for (uint32_t colIdx = 0; colIdx < colCount; colIdx++)
     aCols->AppendElement(colIdx);
 }
 void
 XULTreeGridAccessible::SelectedRowIndices(nsTArray<uint32_t>* aRows)
 {
   uint32_t rowCount = RowCount();
   for (uint32_t rowIdx = 0; rowIdx < rowCount; rowIdx++)
     if (IsRowSelected(rowIdx))
       aRows->AppendElement(rowIdx);
 }
 Accessible*
 XULTreeGridAccessible::CellAt(uint32_t aRowIndex, uint32_t aColumnIndex)
 {
   Accessible* row = GetTreeItemAccessible(aRowIndex);
   if (!row)
     return nullptr;
   nsCOMPtr<nsITreeColumn> column =
     nsCoreUtils::GetSensibleColumnAt(mTree, aColumnIndex);
   if (!column)
     return nullptr;
   nsRefPtr<XULTreeItemAccessibleBase> rowAcc = do_QueryObject(row);
   if (!rowAcc)
     return nullptr;
   return rowAcc->GetCellAccessible(column);
 }
 void
 XULTreeGridAccessible::ColDescription(uint32_t aColIdx, nsString& aDescription)
 {
   aDescription.Truncate();
   nsCOMPtr<nsIAccessible> treeColumns;
   Accessible::GetFirstChild(getter_AddRefs(treeColumns));
   if (treeColumns) {
     nsCOMPtr<nsIAccessible> treeColumnItem;
     treeColumns->GetChildAt(aColIdx, getter_AddRefs(treeColumnItem));
     if (treeColumnItem)
       treeColumnItem->GetName(aDescription);
   }
 }
 bool
 XULTreeGridAccessible::IsColSelected(uint32_t aColIdx)
 {
   // If all the row has been selected, then all the columns are selected.
   // Because we can't select a column alone.
   return SelectedItemCount() == RowCount();
 }
 bool
 XULTreeGridAccessible::IsRowSelected(uint32_t aRowIdx)
 {
   if (!mTreeView)
     return false;
   nsCOMPtr<nsITreeSelection> selection;
   nsresult rv = mTreeView->GetSelection(getter_AddRefs(selection));
   NS_ENSURE_SUCCESS(rv, false);
   bool isSelected = false;
   selection->IsSelected(aRowIdx, &isSelected);
   return isSelected;
 }
 bool
 XULTreeGridAccessible::IsCellSelected(uint32_t aRowIdx, uint32_t aColIdx)
 {
   return IsRowSelected(aRowIdx);
 }
 void
 XULTreeGridAccessible::SelectRow(uint32_t aRowIdx)
 {
   if (!mTreeView)
     return;
   nsCOMPtr<nsITreeSelection> selection;
   mTreeView->GetSelection(getter_AddRefs(selection));
   NS_ASSERTION(selection, "GetSelection() Shouldn't fail!");
   selection->Select(aRowIdx);
 }
 void
 XULTreeGridAccessible::UnselectRow(uint32_t aRowIdx)
 {
   if (!mTreeView)
     return;
   nsCOMPtr<nsITreeSelection> selection;
   mTreeView->GetSelection(getter_AddRefs(selection));
   if (selection)
     selection->ClearRange(aRowIdx, aRowIdx);
 }
 ////////////////////////////////////////////////////////////////////////////////
 // XULTreeGridAccessible: Accessible implementation
 void
 XULTreeGridAccessible::Shutdown()
 {
   mTable = nullptr;
   XULTreeAccessible::Shutdown();
 }
 role
 XULTreeGridAccessible::NativeRole()
 {
   nsCOMPtr<nsITreeColumns> treeColumns;
   mTree->GetColumns(getter_AddRefs(treeColumns));
   if (!treeColumns) {
     NS_ERROR("No treecolumns object for tree!");
     return roles::NOTHING;
   }
   nsCOMPtr<nsITreeColumn> primaryColumn;
   treeColumns->GetPrimaryColumn(getter_AddRefs(primaryColumn));
   return primaryColumn ? roles::TREE_TABLE : roles::TABLE;
 }
 ////////////////////////////////////////////////////////////////////////////////
 // XULTreeGridAccessible: XULTreeAccessible implementation
 already_AddRefed<Accessible>
 XULTreeGridAccessible::CreateTreeItemAccessible(int32_t aRow) const
 {
   nsRefPtr<Accessible> accessible =
     new XULTreeGridRowAccessible(mContent, mDoc,
                                  const_cast<XULTreeGridAccessible*>(this),
                                  mTree, mTreeView, aRow);
   return accessible.forget();
 }
 ////////////////////////////////////////////////////////////////////////////////
 // XULTreeGridRowAccessible
 ////////////////////////////////////////////////////////////////////////////////
 XULTreeGridRowAccessible::
   XULTreeGridRowAccessible(nsIContent* aContent, DocAccessible* aDoc,
                            Accessible* aTreeAcc, nsITreeBoxObject* aTree,
                            nsITreeView* aTreeView, int32_t aRow) :
   XULTreeItemAccessibleBase(aContent, aDoc, aTreeAcc, aTree, aTreeView, aRow),
   mAccessibleCache(kDefaultTreeCacheSize)
 {
   mGenericTypes |= eTableRow;
 }
 ////////////////////////////////////////////////////////////////////////////////
 // XULTreeGridRowAccessible: nsISupports and cycle collection implementation
 NS_IMPL_CYCLE_COLLECTION_INHERITED(XULTreeGridRowAccessible,
                                    XULTreeItemAccessibleBase,
                                    mAccessibleCache)
 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(XULTreeGridRowAccessible)
 NS_INTERFACE_MAP_END_INHERITING(XULTreeItemAccessibleBase)
 NS_IMPL_ADDREF_INHERITED(XULTreeGridRowAccessible,
                          XULTreeItemAccessibleBase)
 NS_IMPL_RELEASE_INHERITED(XULTreeGridRowAccessible,
                           XULTreeItemAccessibleBase)
 ////////////////////////////////////////////////////////////////////////////////
 // XULTreeGridRowAccessible: Accessible implementation
 void
 XULTreeGridRowAccessible::Shutdown()
 {
   ClearCache(mAccessibleCache);
   XULTreeItemAccessibleBase::Shutdown();
 }
 role
 XULTreeGridRowAccessible::NativeRole()
 {
   return roles::ROW;
 }
 ENameValueFlag
 XULTreeGridRowAccessible::Name(nsString& aName)
 {
   aName.Truncate();
   // XXX: the row name sholdn't be a concatenation of cell names (bug 664384).
   nsCOMPtr<nsITreeColumn> column = nsCoreUtils::GetFirstSensibleColumn(mTree);
   while (column) {
     if (!aName.IsEmpty())
       aName.AppendLiteral(" ");
     nsAutoString cellName;
     GetCellName(column, cellName);
     aName.Append(cellName);
     column = nsCoreUtils::GetNextSensibleColumn(column);
   }
   return eNameOK;
 }
 Accessible*
 XULTreeGridRowAccessible::ChildAtPoint(int32_t aX, int32_t aY,
                                        EWhichChildAtPoint aWhichChild)
 {
   nsIFrame *frame = GetFrame();
   if (!frame)
     return nullptr;
   nsPresContext *presContext = frame->PresContext();
   nsIPresShell* presShell = presContext->PresShell();
   nsIFrame *rootFrame = presShell->GetRootFrame();
   NS_ENSURE_TRUE(rootFrame, nullptr);
   nsIntRect rootRect = rootFrame->GetScreenRect();
   int32_t clientX = presContext->DevPixelsToIntCSSPixels(aX) - rootRect.x;
   int32_t clientY = presContext->DevPixelsToIntCSSPixels(aY) - rootRect.y;
   int32_t row = -1;
   nsCOMPtr<nsITreeColumn> column;
   nsAutoCString childEltUnused;
   mTree->GetCellAt(clientX, clientY, &row, getter_AddRefs(column),
                    childEltUnused);
   // Return if we failed to find tree cell in the row for the given point.
   if (row != mRow || !column)
     return nullptr;
   return GetCellAccessible(column);
 }
 Accessible*
 XULTreeGridRowAccessible::GetChildAt(uint32_t aIndex) const
 {
   if (IsDefunct())
     return nullptr;
   nsCOMPtr<nsITreeColumn> column =
     nsCoreUtils::GetSensibleColumnAt(mTree, aIndex);
   if (!column)
     return nullptr;
   return GetCellAccessible(column);
 }
 uint32_t
 XULTreeGridRowAccessible::ChildCount() const
 {
   return nsCoreUtils::GetSensibleColumnCount(mTree);
 }
 ////////////////////////////////////////////////////////////////////////////////
 // XULTreeGridRowAccessible: XULTreeItemAccessibleBase implementation
 Accessible*
 XULTreeGridRowAccessible::GetCellAccessible(nsITreeColumn* aColumn) const
 {
   NS_PRECONDITION(aColumn, "No tree column!");
   void* key = static_cast<void*>(aColumn);
   Accessible* cachedCell = mAccessibleCache.GetWeak(key);
   if (cachedCell)
     return cachedCell;
   nsRefPtr<Accessible> cell =
     new XULTreeGridCellAccessibleWrap(mContent, mDoc,
                                       const_cast<XULTreeGridRowAccessible*>(this),
                                       mTree, mTreeView, mRow, aColumn);
   mAccessibleCache.Put(key, cell);
   Document()->BindToDocument(cell, nullptr);
   return cell;
 }
 void
 XULTreeGridRowAccessible::RowInvalidated(int32_t aStartColIdx,
                                          int32_t aEndColIdx)
 {
   nsCOMPtr<nsITreeColumns> treeColumns;
   mTree->GetColumns(getter_AddRefs(treeColumns));
   if (!treeColumns)
     return;
   bool nameChanged = false;
   for (int32_t colIdx = aStartColIdx; colIdx <= aEndColIdx; ++colIdx) {
     nsCOMPtr<nsITreeColumn> column;
     treeColumns->GetColumnAt(colIdx, getter_AddRefs(column));
     if (column && !nsCoreUtils::IsColumnHidden(column)) {
       Accessible* cellAccessible = GetCellAccessible(column);
       if (cellAccessible) {
         nsRefPtr<XULTreeGridCellAccessible> cellAcc = do_QueryObject(cellAccessible);
         nameChanged |= cellAcc->CellInvalidated();
       }
     }
   }
   if (nameChanged)
     nsEventShell::FireEvent(nsIAccessibleEvent::EVENT_NAME_CHANGE, this);
 }
 ////////////////////////////////////////////////////////////////////////////////
 // XULTreeGridRowAccessible: Accessible protected implementation
 void
 XULTreeGridRowAccessible::CacheChildren()
 {
 }
 ////////////////////////////////////////////////////////////////////////////////
 // XULTreeGridCellAccessible
 ////////////////////////////////////////////////////////////////////////////////
 XULTreeGridCellAccessible::
   XULTreeGridCellAccessible(nsIContent* aContent, DocAccessible* aDoc,
                             XULTreeGridRowAccessible* aRowAcc,
                             nsITreeBoxObject* aTree, nsITreeView* aTreeView,
                             int32_t aRow, nsITreeColumn* aColumn) :
   LeafAccessible(aContent, aDoc), xpcAccessibleTableCell(this), mTree(aTree),
   mTreeView(aTreeView), mRow(aRow), mColumn(aColumn)
 {
   mParent = aRowAcc;
   mStateFlags |= eSharedNode;
   mGenericTypes |= eTableCell;
   NS_ASSERTION(mTreeView, "mTreeView is null");
   int16_t type = -1;
   mColumn->GetType(&type);
   if (type == nsITreeColumn::TYPE_CHECKBOX)
     mTreeView->GetCellValue(mRow, mColumn, mCachedTextEquiv);
   else
     mTreeView->GetCellText(mRow, mColumn, mCachedTextEquiv);
 }
 ////////////////////////////////////////////////////////////////////////////////
 // XULTreeGridCellAccessible: nsISupports implementation
 NS_IMPL_CYCLE_COLLECTION_INHERITED(XULTreeGridCellAccessible, LeafAccessible,
                                    mTree, mColumn)
 NS_INTERFACE_TABLE_HEAD_CYCLE_COLLECTION_INHERITED(XULTreeGridCellAccessible)
   NS_INTERFACE_TABLE_INHERITED(XULTreeGridCellAccessible,
                                nsIAccessibleTableCell,
                                XULTreeGridCellAccessible)
 NS_INTERFACE_TABLE_TAIL_INHERITING(LeafAccessible)
 NS_IMPL_ADDREF_INHERITED(XULTreeGridCellAccessible, LeafAccessible)
 NS_IMPL_RELEASE_INHERITED(XULTreeGridCellAccessible, LeafAccessible)
 ////////////////////////////////////////////////////////////////////////////////
 // XULTreeGridCellAccessible: nsIAccessible implementation
 void
 XULTreeGridCellAccessible::Shutdown()
 {
   mTableCell = nullptr;
   LeafAccessible::Shutdown();
 }
 Accessible*
 XULTreeGridCellAccessible::FocusedChild()
 {
   return nullptr;
 }
 ENameValueFlag
 XULTreeGridCellAccessible::Name(nsString& aName)
 {
   aName.Truncate();
   if (!mTreeView)
     return eNameOK;
   mTreeView->GetCellText(mRow, mColumn, aName);
   // If there is still no name try the cell value:
   // This is for graphical cells. We need tree/table view implementors to implement
   // FooView::GetCellValue to return a meaningful string for cases where there is
   // something shown in the cell (non-text) such as a star icon; in which case
   // GetCellValue for that cell would return "starred" or "flagged" for example.
   if (aName.IsEmpty())
     mTreeView->GetCellValue(mRow, mColumn, aName);
   return eNameOK;
 }
 NS_IMETHODIMP
 XULTreeGridCellAccessible::GetBounds(int32_t* aX, int32_t* aY,
                                      int32_t* aWidth, int32_t* aHeight)
 {
   NS_ENSURE_ARG_POINTER(aX);
   *aX = 0;
   NS_ENSURE_ARG_POINTER(aY);
   *aY = 0;
   NS_ENSURE_ARG_POINTER(aWidth);
   *aWidth = 0;
   NS_ENSURE_ARG_POINTER(aHeight);
   *aHeight = 0;
   if (IsDefunct())
     return NS_ERROR_FAILURE;
   // Get bounds for tree cell and add x and y of treechildren element to
   // x and y of the cell.
   nsCOMPtr<nsIBoxObject> boxObj = nsCoreUtils::GetTreeBodyBoxObject(mTree);
   NS_ENSURE_STATE(boxObj);
   int32_t x = 0, y = 0, width = 0, height = 0;
   nsresult rv = mTree->GetCoordsForCellItem(mRow, mColumn,
                                             NS_LITERAL_CSTRING("cell"),
                                             &x, &y, &width, &height);
   NS_ENSURE_SUCCESS(rv, rv);
   int32_t tcX = 0, tcY = 0;
   boxObj->GetScreenX(&tcX);
   boxObj->GetScreenY(&tcY);
   x += tcX;
   y += tcY;
   nsPresContext* presContext = mDoc->PresContext();
   *aX = presContext->CSSPixelsToDevPixels(x);
   *aY = presContext->CSSPixelsToDevPixels(y);
   *aWidth = presContext->CSSPixelsToDevPixels(width);
   *aHeight = presContext->CSSPixelsToDevPixels(height);
   return NS_OK;
 }
 uint8_t
 XULTreeGridCellAccessible::ActionCount()
 {
   bool isCycler = false;
   mColumn->GetCycler(&isCycler);
   if (isCycler)
     return 1;
   int16_t type;
   mColumn->GetType(&type);
   if (type == nsITreeColumn::TYPE_CHECKBOX && IsEditable())
     return 1;
   return 0;
 }
 NS_IMETHODIMP
 XULTreeGridCellAccessible::GetActionName(uint8_t aIndex, nsAString& aName)
 {
   aName.Truncate();
   if (aIndex != eAction_Click)
     return NS_ERROR_INVALID_ARG;
   if (IsDefunct() || !mTreeView)
     return NS_ERROR_FAILURE;
   bool isCycler = false;
   mColumn->GetCycler(&isCycler);
   if (isCycler) {
     aName.AssignLiteral("cycle");
     return NS_OK;
   }
   int16_t type;
   mColumn->GetType(&type);
   if (type == nsITreeColumn::TYPE_CHECKBOX && IsEditable()) {
     nsAutoString value;
     mTreeView->GetCellValue(mRow, mColumn, value);
     if (value.EqualsLiteral("true"))
       aName.AssignLiteral("uncheck");
     else
       aName.AssignLiteral("check");
     return NS_OK;
   }
   return NS_ERROR_INVALID_ARG;
 }
 NS_IMETHODIMP
 XULTreeGridCellAccessible::DoAction(uint8_t aIndex)
 {
   if (aIndex != eAction_Click)
     return NS_ERROR_INVALID_ARG;
   if (IsDefunct())
     return NS_ERROR_FAILURE;
   bool isCycler = false;
   mColumn->GetCycler(&isCycler);
   if (isCycler) {
     DoCommand();
     return NS_OK;
   }
   int16_t type;
   mColumn->GetType(&type);
   if (type == nsITreeColumn::TYPE_CHECKBOX && IsEditable()) {
     DoCommand();
     return NS_OK;
   }
   return NS_ERROR_INVALID_ARG;
 }
 ////////////////////////////////////////////////////////////////////////////////
 // XULTreeGridCellAccessible: nsIAccessibleTableCell implementation
 TableAccessible*
 XULTreeGridCellAccessible::Table() const
 {
   Accessible* grandParent = mParent->Parent();
   if (grandParent)
     return grandParent->AsTable();
   return nullptr;
 }
 uint32_t
 XULTreeGridCellAccessible::ColIdx() const
 {
   uint32_t colIdx = 0;
   nsCOMPtr<nsITreeColumn> column = mColumn;
   while ((column = nsCoreUtils::GetPreviousSensibleColumn(column)))
     colIdx++;
   return colIdx;
 }
 uint32_t
 XULTreeGridCellAccessible::RowIdx() const
 {
   return mRow;
 }
 void
 XULTreeGridCellAccessible::ColHeaderCells(nsTArray<Accessible*>* aHeaderCells)
 {
   nsCOMPtr<nsIDOMElement> columnElm;
   mColumn->GetElement(getter_AddRefs(columnElm));
   nsCOMPtr<nsIContent> columnContent(do_QueryInterface(columnElm));
   Accessible* headerCell = mDoc->GetAccessible(columnContent);
   if (headerCell)
     aHeaderCells->AppendElement(headerCell);
 }
 bool
 XULTreeGridCellAccessible::Selected()
 {
   nsCOMPtr<nsITreeSelection> selection;
   nsresult rv = mTreeView->GetSelection(getter_AddRefs(selection));
   NS_ENSURE_SUCCESS(rv, false);
   bool selected = false;
   selection->IsSelected(mRow, &selected);
   return selected;
 }
 ////////////////////////////////////////////////////////////////////////////////
 // XULTreeGridCellAccessible: Accessible public implementation
 already_AddRefed<nsIPersistentProperties>
 XULTreeGridCellAccessible::NativeAttributes()
 {
   nsCOMPtr<nsIPersistentProperties> attributes =
     do_CreateInstance(NS_PERSISTENTPROPERTIES_CONTRACTID);
   // "table-cell-index" attribute
   TableAccessible* table = Table();
   if (!table)
     return attributes.forget();
   nsAutoString stringIdx;
   stringIdx.AppendInt(table->CellIndexAt(mRow, ColIdx()));
   nsAccUtils::SetAccAttr(attributes, nsGkAtoms::tableCellIndex, stringIdx);
   // "cycles" attribute
   bool isCycler = false;
   nsresult rv = mColumn->GetCycler(&isCycler);
   if (NS_SUCCEEDED(rv) && isCycler)
     nsAccUtils::SetAccAttr(attributes, nsGkAtoms::cycles,
                            NS_LITERAL_STRING("true"));
   return attributes.forget();
 }
 role
 XULTreeGridCellAccessible::NativeRole()
 {
   return roles::GRID_CELL;
 }
 uint64_t
 XULTreeGridCellAccessible::NativeState()
 {
   if (!mTreeView)
     return states::DEFUNCT;
   // selectable/selected state
   uint64_t states = states::SELECTABLE; // keep in sync with NativeInteractiveState
   nsCOMPtr<nsITreeSelection> selection;
   mTreeView->GetSelection(getter_AddRefs(selection));
   if (selection) {
     bool isSelected = false;
     selection->IsSelected(mRow, &isSelected);
     if (isSelected)
       states |= states::SELECTED;
   }
   // checked state
   int16_t type;
   mColumn->GetType(&type);
   if (type == nsITreeColumn::TYPE_CHECKBOX) {
     states |= states::CHECKABLE;
     nsAutoString checked;
     mTreeView->GetCellValue(mRow, mColumn, checked);
     if (checked.EqualsIgnoreCase("true"))
       states |= states::CHECKED;
   }
   return states;
 }
 uint64_t
 XULTreeGridCellAccessible::NativeInteractiveState() const
 {
   return states::SELECTABLE;
 }
 int32_t
 XULTreeGridCellAccessible::IndexInParent() const
 {
   return ColIdx();
 }
 Relation
 XULTreeGridCellAccessible::RelationByType(RelationType aType)
 {
   return Relation();
 }
 ////////////////////////////////////////////////////////////////////////////////
 // XULTreeGridCellAccessible: public implementation
 bool
 XULTreeGridCellAccessible::CellInvalidated()
 {
   nsAutoString textEquiv;
   int16_t type;
   mColumn->GetType(&type);
   if (type == nsITreeColumn::TYPE_CHECKBOX) {
     mTreeView->GetCellValue(mRow, mColumn, textEquiv);
     if (mCachedTextEquiv != textEquiv) {
       bool isEnabled = textEquiv.EqualsLiteral("true");
       nsRefPtr<AccEvent> accEvent =
         new AccStateChangeEvent(this, states::CHECKED, isEnabled);
       nsEventShell::FireEvent(accEvent);
       mCachedTextEquiv = textEquiv;
       return true;
     }
     return false;
   }
   mTreeView->GetCellText(mRow, mColumn, textEquiv);
   if (mCachedTextEquiv != textEquiv) {
     nsEventShell::FireEvent(nsIAccessibleEvent::EVENT_NAME_CHANGE, this);
     mCachedTextEquiv = textEquiv;
     return true;
   }
   return false;
 }
 ////////////////////////////////////////////////////////////////////////////////
 // XULTreeGridCellAccessible: Accessible protected implementation
 Accessible*
 XULTreeGridCellAccessible::GetSiblingAtOffset(int32_t aOffset,
                                               nsresult* aError) const
 {
   if (aError)
     *aError =  NS_OK; // fail peacefully
   nsCOMPtr<nsITreeColumn> columnAtOffset(mColumn), column;
   if (aOffset < 0) {
     for (int32_t index = aOffset; index < 0 && columnAtOffset; index++) {
       column = nsCoreUtils::GetPreviousSensibleColumn(columnAtOffset);
       column.swap(columnAtOffset);
     }
   } else {
     for (int32_t index = aOffset; index > 0 && columnAtOffset; index--) {
       column = nsCoreUtils::GetNextSensibleColumn(columnAtOffset);
       column.swap(columnAtOffset);
     }
   }
   if (!columnAtOffset)
     return nullptr;
   nsRefPtr<XULTreeItemAccessibleBase> rowAcc = do_QueryObject(Parent());
   return rowAcc->GetCellAccessible(columnAtOffset);
 }
 void
 XULTreeGridCellAccessible::DispatchClickEvent(nsIContent* aContent,
                                               uint32_t aActionIndex)
 {
   if (IsDefunct())
     return;
   nsCoreUtils::DispatchClickEvent(mTree, mRow, mColumn);
 }
 ////////////////////////////////////////////////////////////////////////////////
 // XULTreeGridCellAccessible: protected implementation
 bool
 XULTreeGridCellAccessible::IsEditable() const
 {
   // XXX: logic corresponds to tree.xml, it's preferable to have interface
   // method to check it.
   bool isEditable = false;
   nsresult rv = mTreeView->IsEditable(mRow, mColumn, &isEditable);
   if (NS_FAILED(rv) || !isEditable)
     return false;
   nsCOMPtr<nsIDOMElement> columnElm;
   mColumn->GetElement(getter_AddRefs(columnElm));
   if (!columnElm)
     return false;
   nsCOMPtr<nsIContent> columnContent(do_QueryInterface(columnElm));
   if (!columnContent->AttrValueIs(kNameSpaceID_None,
                                   nsGkAtoms::editable,
                                   nsGkAtoms::_true,
                                   eCaseMatters))
     return false;
   return mContent->AttrValueIs(kNameSpaceID_None,
                                nsGkAtoms::editable,
                                nsGkAtoms::_true, eCaseMatters);
 }

The Tor Browser / annotate

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

accessible/src/xul/XULTreeGridAccessible.cpp