gecko-dev/accessible/generic/ARIAGridAccessible.cpp

616 строки
15 KiB
C++

/* -*- 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 "ARIAGridAccessible-inl.h"
#include "Accessible-inl.h"
#include "AccIterator.h"
#include "nsAccUtils.h"
#include "Role.h"
#include "States.h"
#include "nsIMutableArray.h"
#include "nsIPersistentProperties2.h"
#include "nsComponentManagerUtils.h"
using namespace mozilla;
using namespace mozilla::a11y;
////////////////////////////////////////////////////////////////////////////////
// ARIAGridAccessible
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
// Constructor
ARIAGridAccessible::
ARIAGridAccessible(nsIContent* aContent, DocAccessible* aDoc) :
AccessibleWrap(aContent, aDoc)
{
}
NS_IMPL_ISUPPORTS_INHERITED0(ARIAGridAccessible, Accessible)
////////////////////////////////////////////////////////////////////////////////
// Table
uint32_t
ARIAGridAccessible::ColCount()
{
AccIterator rowIter(this, filters::GetRow);
Accessible* row = rowIter.Next();
if (!row)
return 0;
AccIterator cellIter(row, filters::GetCell);
Accessible* cell = nullptr;
uint32_t colCount = 0;
while ((cell = cellIter.Next()))
colCount++;
return colCount;
}
uint32_t
ARIAGridAccessible::RowCount()
{
uint32_t rowCount = 0;
AccIterator rowIter(this, filters::GetRow);
while (rowIter.Next())
rowCount++;
return rowCount;
}
Accessible*
ARIAGridAccessible::CellAt(uint32_t aRowIndex, uint32_t aColumnIndex)
{
Accessible* row = GetRowAt(aRowIndex);
if (!row)
return nullptr;
return GetCellInRowAt(row, aColumnIndex);
}
bool
ARIAGridAccessible::IsColSelected(uint32_t aColIdx)
{
AccIterator rowIter(this, filters::GetRow);
Accessible* row = rowIter.Next();
if (!row)
return false;
do {
if (!nsAccUtils::IsARIASelected(row)) {
Accessible* cell = GetCellInRowAt(row, aColIdx);
if (!cell || !nsAccUtils::IsARIASelected(cell))
return false;
}
} while ((row = rowIter.Next()));
return true;
}
bool
ARIAGridAccessible::IsRowSelected(uint32_t aRowIdx)
{
Accessible* row = GetRowAt(aRowIdx);
if(!row)
return false;
if (!nsAccUtils::IsARIASelected(row)) {
AccIterator cellIter(row, filters::GetCell);
Accessible* cell = nullptr;
while ((cell = cellIter.Next())) {
if (!nsAccUtils::IsARIASelected(cell))
return false;
}
}
return true;
}
bool
ARIAGridAccessible::IsCellSelected(uint32_t aRowIdx, uint32_t aColIdx)
{
Accessible* row = GetRowAt(aRowIdx);
if(!row)
return false;
if (!nsAccUtils::IsARIASelected(row)) {
Accessible* cell = GetCellInRowAt(row, aColIdx);
if (!cell || !nsAccUtils::IsARIASelected(cell))
return false;
}
return true;
}
uint32_t
ARIAGridAccessible::SelectedCellCount()
{
uint32_t count = 0, colCount = ColCount();
AccIterator rowIter(this, filters::GetRow);
Accessible* row = nullptr;
while ((row = rowIter.Next())) {
if (nsAccUtils::IsARIASelected(row)) {
count += colCount;
continue;
}
AccIterator cellIter(row, filters::GetCell);
Accessible* cell = nullptr;
while ((cell = cellIter.Next())) {
if (nsAccUtils::IsARIASelected(cell))
count++;
}
}
return count;
}
uint32_t
ARIAGridAccessible::SelectedColCount()
{
uint32_t colCount = ColCount();
if (!colCount)
return 0;
AccIterator rowIter(this, filters::GetRow);
Accessible* row = rowIter.Next();
if (!row)
return 0;
nsTArray<bool> isColSelArray(colCount);
isColSelArray.AppendElements(colCount);
memset(isColSelArray.Elements(), true, colCount * sizeof(bool));
uint32_t selColCount = colCount;
do {
if (nsAccUtils::IsARIASelected(row))
continue;
AccIterator cellIter(row, filters::GetCell);
Accessible* cell = nullptr;
for (uint32_t colIdx = 0;
(cell = cellIter.Next()) && colIdx < colCount; colIdx++)
if (isColSelArray[colIdx] && !nsAccUtils::IsARIASelected(cell)) {
isColSelArray[colIdx] = false;
selColCount--;
}
} while ((row = rowIter.Next()));
return selColCount;
}
uint32_t
ARIAGridAccessible::SelectedRowCount()
{
uint32_t count = 0;
AccIterator rowIter(this, filters::GetRow);
Accessible* row = nullptr;
while ((row = rowIter.Next())) {
if (nsAccUtils::IsARIASelected(row)) {
count++;
continue;
}
AccIterator cellIter(row, filters::GetCell);
Accessible* cell = cellIter.Next();
if (!cell)
continue;
bool isRowSelected = true;
do {
if (!nsAccUtils::IsARIASelected(cell)) {
isRowSelected = false;
break;
}
} while ((cell = cellIter.Next()));
if (isRowSelected)
count++;
}
return count;
}
void
ARIAGridAccessible::SelectedCells(nsTArray<Accessible*>* aCells)
{
AccIterator rowIter(this, filters::GetRow);
Accessible* row = nullptr;
while ((row = rowIter.Next())) {
AccIterator cellIter(row, filters::GetCell);
Accessible* cell = nullptr;
if (nsAccUtils::IsARIASelected(row)) {
while ((cell = cellIter.Next()))
aCells->AppendElement(cell);
continue;
}
while ((cell = cellIter.Next())) {
if (nsAccUtils::IsARIASelected(cell))
aCells->AppendElement(cell);
}
}
}
void
ARIAGridAccessible::SelectedCellIndices(nsTArray<uint32_t>* aCells)
{
uint32_t colCount = ColCount();
AccIterator rowIter(this, filters::GetRow);
Accessible* row = nullptr;
for (uint32_t rowIdx = 0; (row = rowIter.Next()); rowIdx++) {
if (nsAccUtils::IsARIASelected(row)) {
for (uint32_t colIdx = 0; colIdx < colCount; colIdx++)
aCells->AppendElement(rowIdx * colCount + colIdx);
continue;
}
AccIterator cellIter(row, filters::GetCell);
Accessible* cell = nullptr;
for (uint32_t colIdx = 0; (cell = cellIter.Next()); colIdx++) {
if (nsAccUtils::IsARIASelected(cell))
aCells->AppendElement(rowIdx * colCount + colIdx);
}
}
}
void
ARIAGridAccessible::SelectedColIndices(nsTArray<uint32_t>* aCols)
{
uint32_t colCount = ColCount();
if (!colCount)
return;
AccIterator rowIter(this, filters::GetRow);
Accessible* row = rowIter.Next();
if (!row)
return;
nsTArray<bool> isColSelArray(colCount);
isColSelArray.AppendElements(colCount);
memset(isColSelArray.Elements(), true, colCount * sizeof(bool));
do {
if (nsAccUtils::IsARIASelected(row))
continue;
AccIterator cellIter(row, filters::GetCell);
Accessible* cell = nullptr;
for (uint32_t colIdx = 0;
(cell = cellIter.Next()) && colIdx < colCount; colIdx++)
if (isColSelArray[colIdx] && !nsAccUtils::IsARIASelected(cell)) {
isColSelArray[colIdx] = false;
}
} while ((row = rowIter.Next()));
for (uint32_t colIdx = 0; colIdx < colCount; colIdx++)
if (isColSelArray[colIdx])
aCols->AppendElement(colIdx);
}
void
ARIAGridAccessible::SelectedRowIndices(nsTArray<uint32_t>* aRows)
{
AccIterator rowIter(this, filters::GetRow);
Accessible* row = nullptr;
for (uint32_t rowIdx = 0; (row = rowIter.Next()); rowIdx++) {
if (nsAccUtils::IsARIASelected(row)) {
aRows->AppendElement(rowIdx);
continue;
}
AccIterator cellIter(row, filters::GetCell);
Accessible* cell = cellIter.Next();
if (!cell)
continue;
bool isRowSelected = true;
do {
if (!nsAccUtils::IsARIASelected(cell)) {
isRowSelected = false;
break;
}
} while ((cell = cellIter.Next()));
if (isRowSelected)
aRows->AppendElement(rowIdx);
}
}
void
ARIAGridAccessible::SelectRow(uint32_t aRowIdx)
{
AccIterator rowIter(this, filters::GetRow);
Accessible* row = nullptr;
for (uint32_t rowIdx = 0; (row = rowIter.Next()); rowIdx++) {
DebugOnly<nsresult> rv = SetARIASelected(row, rowIdx == aRowIdx);
NS_ASSERTION(NS_SUCCEEDED(rv), "SetARIASelected() Shouldn't fail!");
}
}
void
ARIAGridAccessible::SelectCol(uint32_t aColIdx)
{
AccIterator rowIter(this, filters::GetRow);
Accessible* row = nullptr;
while ((row = rowIter.Next())) {
// Unselect all cells in the row.
DebugOnly<nsresult> rv = SetARIASelected(row, false);
NS_ASSERTION(NS_SUCCEEDED(rv), "SetARIASelected() Shouldn't fail!");
// Select cell at the column index.
Accessible* cell = GetCellInRowAt(row, aColIdx);
if (cell)
SetARIASelected(cell, true);
}
}
void
ARIAGridAccessible::UnselectRow(uint32_t aRowIdx)
{
Accessible* row = GetRowAt(aRowIdx);
if (row)
SetARIASelected(row, false);
}
void
ARIAGridAccessible::UnselectCol(uint32_t aColIdx)
{
AccIterator rowIter(this, filters::GetRow);
Accessible* row = nullptr;
while ((row = rowIter.Next())) {
Accessible* cell = GetCellInRowAt(row, aColIdx);
if (cell)
SetARIASelected(cell, false);
}
}
////////////////////////////////////////////////////////////////////////////////
// Protected
Accessible*
ARIAGridAccessible::GetRowAt(int32_t aRow)
{
int32_t rowIdx = aRow;
AccIterator rowIter(this, filters::GetRow);
Accessible* row = rowIter.Next();
while (rowIdx != 0 && (row = rowIter.Next()))
rowIdx--;
return row;
}
Accessible*
ARIAGridAccessible::GetCellInRowAt(Accessible* aRow, int32_t aColumn)
{
int32_t colIdx = aColumn;
AccIterator cellIter(aRow, filters::GetCell);
Accessible* cell = cellIter.Next();
while (colIdx != 0 && (cell = cellIter.Next()))
colIdx--;
return cell;
}
nsresult
ARIAGridAccessible::SetARIASelected(Accessible* aAccessible,
bool aIsSelected, bool aNotify)
{
nsIContent *content = aAccessible->GetContent();
NS_ENSURE_STATE(content);
nsresult rv = NS_OK;
if (aIsSelected)
rv = content->SetAttr(kNameSpaceID_None, nsGkAtoms::aria_selected,
NS_LITERAL_STRING("true"), aNotify);
else
rv = content->SetAttr(kNameSpaceID_None, nsGkAtoms::aria_selected,
NS_LITERAL_STRING("false"), aNotify);
NS_ENSURE_SUCCESS(rv, rv);
// No "smart" select/unselect for internal call.
if (!aNotify)
return NS_OK;
// If row or cell accessible was selected then we're able to not bother about
// selection of its cells or its row because our algorithm is row oriented,
// i.e. we check selection on row firstly and then on cells.
if (aIsSelected)
return NS_OK;
roles::Role role = aAccessible->Role();
// If the given accessible is row that was unselected then remove
// aria-selected from cell accessible.
if (role == roles::ROW) {
AccIterator cellIter(aAccessible, filters::GetCell);
Accessible* cell = nullptr;
while ((cell = cellIter.Next())) {
rv = SetARIASelected(cell, false, false);
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
// If the given accessible is cell that was unselected and its row is selected
// then remove aria-selected from row and put aria-selected on
// siblings cells.
if (role == roles::GRID_CELL || role == roles::ROWHEADER ||
role == roles::COLUMNHEADER) {
Accessible* row = aAccessible->Parent();
if (row && row->Role() == roles::ROW &&
nsAccUtils::IsARIASelected(row)) {
rv = SetARIASelected(row, false, false);
NS_ENSURE_SUCCESS(rv, rv);
AccIterator cellIter(row, filters::GetCell);
Accessible* cell = nullptr;
while ((cell = cellIter.Next())) {
if (cell != aAccessible) {
rv = SetARIASelected(cell, true, false);
NS_ENSURE_SUCCESS(rv, rv);
}
}
}
}
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////
// ARIAGridCellAccessible
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
// Constructor
ARIAGridCellAccessible::
ARIAGridCellAccessible(nsIContent* aContent, DocAccessible* aDoc) :
HyperTextAccessibleWrap(aContent, aDoc)
{
mGenericTypes |= eTableCell;
}
NS_IMPL_ISUPPORTS_INHERITED0(ARIAGridCellAccessible, HyperTextAccessible)
////////////////////////////////////////////////////////////////////////////////
// TableCell
TableAccessible*
ARIAGridCellAccessible::Table() const
{
Accessible* table = TableFor(Row());
return table ? table->AsTable() : nullptr;
}
uint32_t
ARIAGridCellAccessible::ColIdx() const
{
Accessible* row = Row();
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::GRID_CELL || role == roles::ROWHEADER ||
role == roles::COLUMNHEADER)
colIdx++;
}
return colIdx;
}
uint32_t
ARIAGridCellAccessible::RowIdx() const
{
return RowIndexFor(Row());
}
bool
ARIAGridCellAccessible::Selected()
{
Accessible* row = Row();
if (!row)
return false;
return nsAccUtils::IsARIASelected(row) || nsAccUtils::IsARIASelected(this);
}
////////////////////////////////////////////////////////////////////////////////
// Accessible
void
ARIAGridCellAccessible::ApplyARIAState(uint64_t* aState) const
{
HyperTextAccessibleWrap::ApplyARIAState(aState);
// Return if the gridcell has aria-selected="true".
if (*aState & states::SELECTED)
return;
// Check aria-selected="true" on the row.
Accessible* row = Parent();
if (!row || row->Role() != roles::ROW)
return;
nsIContent *rowContent = row->GetContent();
if (nsAccUtils::HasDefinedARIAToken(rowContent,
nsGkAtoms::aria_selected) &&
!rowContent->AttrValueIs(kNameSpaceID_None,
nsGkAtoms::aria_selected,
nsGkAtoms::_false, eCaseMatters))
*aState |= states::SELECTABLE | states::SELECTED;
}
already_AddRefed<nsIPersistentProperties>
ARIAGridCellAccessible::NativeAttributes()
{
nsCOMPtr<nsIPersistentProperties> attributes =
HyperTextAccessibleWrap::NativeAttributes();
// Expose "table-cell-index" attribute.
Accessible* thisRow = Row();
if (!thisRow)
return attributes.forget();
int32_t colIdx = 0, colCount = 0;
uint32_t childCount = thisRow->ChildCount();
for (uint32_t childIdx = 0; childIdx < childCount; childIdx++) {
Accessible* child = thisRow->GetChildAt(childIdx);
if (child == this)
colIdx = colCount;
roles::Role role = child->Role();
if (role == roles::GRID_CELL || role == roles::ROWHEADER ||
role == roles::COLUMNHEADER)
colCount++;
}
int32_t rowIdx = RowIndexFor(thisRow);
nsAutoString stringIdx;
stringIdx.AppendInt(rowIdx * colCount + colIdx);
nsAccUtils::SetAccAttr(attributes, nsGkAtoms::tableCellIndex, stringIdx);
#ifdef DEBUG
nsAutoString unused;
attributes->SetStringProperty(NS_LITERAL_CSTRING("cppclass"),
NS_LITERAL_STRING("ARIAGridCellAccessible"),
unused);
#endif
return attributes.forget();
}