accessible/generic/ARIAGridAccessible.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "ARIAGridAccessible.h"
   7
   8 #include <stdint.h>
   9 #include "LocalAccessible-inl.h"
  10 #include "AccAttributes.h"
  11 #include "mozilla/a11y/TableAccessible.h"
  12 #include "mozilla/a11y/TableCellAccessible.h"
  13 #include "nsAccessibilityService.h"
  14 #include "nsAccUtils.h"
  15 #include "nsGkAtoms.h"
  16 #include "mozilla/a11y/Role.h"
  17 #include "States.h"
  18
  19 using namespace mozilla;
  20 using namespace mozilla::a11y;
  21
  22 ////////////////////////////////////////////////////////////////////////////////
  23 // ARIAGridCellAccessible
  24 ////////////////////////////////////////////////////////////////////////////////
  25
  26 ////////////////////////////////////////////////////////////////////////////////
  27 // Constructor
  28
  29 ARIAGridCellAccessible::ARIAGridCellAccessible(nsIContent* aContent,
  30                                                DocAccessible* aDoc)
  31     : HyperTextAccessible(aContent, aDoc) {
  32   mGenericTypes |= eTableCell;
  33 }
  34
  35 ////////////////////////////////////////////////////////////////////////////////
  36 // LocalAccessible
  37
  38 void ARIAGridCellAccessible::ApplyARIAState(uint64_t* aState) const {
  39   HyperTextAccessible::ApplyARIAState(aState);
  40
  41   // Return if the gridcell has aria-selected="true".
  42   if (*aState & states::SELECTED) return;
  43
  44   // Check aria-selected="true" on the row.
  45   LocalAccessible* row = LocalParent();
  46   if (!row || row->Role() != roles::ROW) return;
  47
  48   nsIContent* rowContent = row->GetContent();
  49   if (nsAccUtils::HasDefinedARIAToken(rowContent, nsGkAtoms::aria_selected) &&
  50       !nsAccUtils::ARIAAttrValueIs(rowContent->AsElement(),
  51                                    nsGkAtoms::aria_selected, nsGkAtoms::_false,
  52                                    eCaseMatters)) {
  53     *aState |= states::SELECTABLE | states::SELECTED;
  54   }
  55 }
  56
  57 already_AddRefed<AccAttributes> ARIAGridCellAccessible::NativeAttributes() {
  58   RefPtr<AccAttributes> attributes = HyperTextAccessible::NativeAttributes();
  59
  60   // We only need to expose table-cell-index to clients. If we're in the content
  61   // process, we don't need this, so building a CachedTableAccessible is very
  62   // wasteful. This will be exposed by RemoteAccessible in the parent process
  63   // instead.
  64   if (!IPCAccessibilityActive()) {
  65     if (const TableCellAccessible* cell = AsTableCell()) {
  66       TableAccessible* table = cell->Table();
  67       const uint32_t row = cell->RowIdx();
  68       const uint32_t col = cell->ColIdx();
  69       const int32_t cellIdx = table->CellIndexAt(row, col);
  70       if (cellIdx != -1) {
  71         attributes->SetAttribute(nsGkAtoms::tableCellIndex, cellIdx);
  72       }
  73     }
  74   }
  75
  76   return attributes.forget();
  77 }