pollymc/launcher/ui/instanceview/AccessibleInstanceView.cpp
2021-11-22 03:55:16 +01:00

779 lines
22 KiB
C++

#include "InstanceView.h"
#include "AccessibleInstanceView.h"
#include "AccessibleInstanceView_p.h"
#include <qvariant.h>
#include <qaccessible.h>
#include <qheaderview.h>
#ifndef QT_NO_ACCESSIBILITY
QAccessibleInterface *groupViewAccessibleFactory(const QString &classname, QObject *object)
{
QAccessibleInterface *iface = 0;
if (!object || !object->isWidgetType())
return iface;
QWidget *widget = static_cast<QWidget*>(object);
if (classname == QLatin1String("InstanceView")) {
iface = new AccessibleInstanceView((InstanceView *)widget);
}
return iface;
}
QAbstractItemView *AccessibleInstanceView::view() const
{
return qobject_cast<QAbstractItemView*>(object());
}
int AccessibleInstanceView::logicalIndex(const QModelIndex &index) const
{
if (!view()->model() || !index.isValid())
return -1;
return index.row() * (index.model()->columnCount()) + index.column();
}
AccessibleInstanceView::AccessibleInstanceView(QWidget *w)
: QAccessibleObject(w)
{
Q_ASSERT(view());
}
bool AccessibleInstanceView::isValid() const
{
return view();
}
AccessibleInstanceView::~AccessibleInstanceView()
{
for (QAccessible::Id id : childToId) {
QAccessible::deleteAccessibleInterface(id);
}
}
QAccessibleInterface *AccessibleInstanceView::cellAt(int row, int column) const
{
if (!view()->model()) {
return 0;
}
QModelIndex index = view()->model()->index(row, column, view()->rootIndex());
if (Q_UNLIKELY(!index.isValid())) {
qWarning() << "AccessibleInstanceView::cellAt: invalid index: " << index << " for " << view();
return 0;
}
return child(logicalIndex(index));
}
QAccessibleInterface *AccessibleInstanceView::caption() const
{
return 0;
}
QString AccessibleInstanceView::columnDescription(int column) const
{
if (!view()->model())
return QString();
return view()->model()->headerData(column, Qt::Horizontal).toString();
}
int AccessibleInstanceView::columnCount() const
{
if (!view()->model())
return 0;
return 1;
}
int AccessibleInstanceView::rowCount() const
{
if (!view()->model())
return 0;
return view()->model()->rowCount();
}
int AccessibleInstanceView::selectedCellCount() const
{
if (!view()->selectionModel())
return 0;
return view()->selectionModel()->selectedIndexes().count();
}
int AccessibleInstanceView::selectedColumnCount() const
{
if (!view()->selectionModel())
return 0;
return view()->selectionModel()->selectedColumns().count();
}
int AccessibleInstanceView::selectedRowCount() const
{
if (!view()->selectionModel())
return 0;
return view()->selectionModel()->selectedRows().count();
}
QString AccessibleInstanceView::rowDescription(int row) const
{
if (!view()->model())
return QString();
return view()->model()->headerData(row, Qt::Vertical).toString();
}
QList<QAccessibleInterface *> AccessibleInstanceView::selectedCells() const
{
QList<QAccessibleInterface*> cells;
if (!view()->selectionModel())
return cells;
const QModelIndexList selectedIndexes = view()->selectionModel()->selectedIndexes();
cells.reserve(selectedIndexes.size());
for (const QModelIndex &index : selectedIndexes)
cells.append(child(logicalIndex(index)));
return cells;
}
QList<int> AccessibleInstanceView::selectedColumns() const
{
if (!view()->selectionModel()) {
return QList<int>();
}
const QModelIndexList selectedColumns = view()->selectionModel()->selectedColumns();
QList<int> columns;
columns.reserve(selectedColumns.size());
for (const QModelIndex &index : selectedColumns) {
columns.append(index.column());
}
return columns;
}
QList<int> AccessibleInstanceView::selectedRows() const
{
if (!view()->selectionModel()) {
return QList<int>();
}
QList<int> rows;
const QModelIndexList selectedRows = view()->selectionModel()->selectedRows();
rows.reserve(selectedRows.size());
for (const QModelIndex &index : selectedRows) {
rows.append(index.row());
}
return rows;
}
QAccessibleInterface *AccessibleInstanceView::summary() const
{
return 0;
}
bool AccessibleInstanceView::isColumnSelected(int column) const
{
if (!view()->selectionModel()) {
return false;
}
return view()->selectionModel()->isColumnSelected(column, QModelIndex());
}
bool AccessibleInstanceView::isRowSelected(int row) const
{
if (!view()->selectionModel()) {
return false;
}
return view()->selectionModel()->isRowSelected(row, QModelIndex());
}
bool AccessibleInstanceView::selectRow(int row)
{
if (!view()->model() || !view()->selectionModel()) {
return false;
}
QModelIndex index = view()->model()->index(row, 0, view()->rootIndex());
if (!index.isValid() || view()->selectionBehavior() == QAbstractItemView::SelectColumns) {
return false;
}
switch (view()->selectionMode()) {
case QAbstractItemView::NoSelection: {
return false;
}
case QAbstractItemView::SingleSelection: {
if (view()->selectionBehavior() != QAbstractItemView::SelectRows && columnCount() > 1 )
return false;
view()->clearSelection();
break;
}
case QAbstractItemView::ContiguousSelection: {
if ((!row || !view()->selectionModel()->isRowSelected(row - 1, view()->rootIndex())) && !view()->selectionModel()->isRowSelected(row + 1, view()->rootIndex())) {
view()->clearSelection();
}
break;
}
default: {
break;
}
}
view()->selectionModel()->select(index, QItemSelectionModel::Select | QItemSelectionModel::Rows);
return true;
}
bool AccessibleInstanceView::selectColumn(int column)
{
if (!view()->model() || !view()->selectionModel()) {
return false;
}
QModelIndex index = view()->model()->index(0, column, view()->rootIndex());
if (!index.isValid() || view()->selectionBehavior() == QAbstractItemView::SelectRows) {
return false;
}
switch (view()->selectionMode()) {
case QAbstractItemView::NoSelection: {
return false;
}
case QAbstractItemView::SingleSelection: {
if (view()->selectionBehavior() != QAbstractItemView::SelectColumns && rowCount() > 1) {
return false;
}
// fallthrough intentional
}
case QAbstractItemView::ContiguousSelection: {
if ((!column || !view()->selectionModel()->isColumnSelected(column - 1, view()->rootIndex())) && !view()->selectionModel()->isColumnSelected(column + 1, view()->rootIndex())) {
view()->clearSelection();
}
break;
}
default: {
break;
}
}
view()->selectionModel()->select(index, QItemSelectionModel::Select | QItemSelectionModel::Columns);
return true;
}
bool AccessibleInstanceView::unselectRow(int row)
{
if (!view()->model() || !view()->selectionModel()) {
return false;
}
QModelIndex index = view()->model()->index(row, 0, view()->rootIndex());
if (!index.isValid()) {
return false;
}
QItemSelection selection(index, index);
auto selectionModel = view()->selectionModel();
switch (view()->selectionMode()) {
case QAbstractItemView::SingleSelection:
// no unselect
if (selectedRowCount() == 1) {
return false;
}
break;
case QAbstractItemView::ContiguousSelection: {
// no unselect
if (selectedRowCount() == 1) {
return false;
}
if ((!row || selectionModel->isRowSelected(row - 1, view()->rootIndex())) && selectionModel->isRowSelected(row + 1, view()->rootIndex())) {
//If there are rows selected both up the current row and down the current rown,
//the ones which are down the current row will be deselected
selection = QItemSelection(index, view()->model()->index(rowCount() - 1, 0, view()->rootIndex()));
}
}
default: {
break;
}
}
selectionModel->select(selection, QItemSelectionModel::Deselect | QItemSelectionModel::Rows);
return true;
}
bool AccessibleInstanceView::unselectColumn(int column)
{
auto model = view()->model();
if (!model || !view()->selectionModel()) {
return false;
}
QModelIndex index = model->index(0, column, view()->rootIndex());
if (!index.isValid()) {
return false;
}
QItemSelection selection(index, index);
switch (view()->selectionMode()) {
case QAbstractItemView::SingleSelection: {
//In SingleSelection and ContiguousSelection once an item
//is selected, there's no way for the user to unselect all items
if (selectedColumnCount() == 1) {
return false;
}
break;
}
case QAbstractItemView::ContiguousSelection:
if (selectedColumnCount() == 1) {
return false;
}
if ((!column || view()->selectionModel()->isColumnSelected(column - 1, view()->rootIndex()))
&& view()->selectionModel()->isColumnSelected(column + 1, view()->rootIndex())) {
//If there are columns selected both at the left of the current row and at the right
//of the current row, the ones which are at the right will be deselected
selection = QItemSelection(index, model->index(0, columnCount() - 1, view()->rootIndex()));
}
default:
break;
}
view()->selectionModel()->select(selection, QItemSelectionModel::Deselect | QItemSelectionModel::Columns);
return true;
}
QAccessible::Role AccessibleInstanceView::role() const
{
return QAccessible::List;
}
QAccessible::State AccessibleInstanceView::state() const
{
return QAccessible::State();
}
QAccessibleInterface *AccessibleInstanceView::childAt(int x, int y) const
{
QPoint viewportOffset = view()->viewport()->mapTo(view(), QPoint(0,0));
QPoint indexPosition = view()->mapFromGlobal(QPoint(x, y) - viewportOffset);
// FIXME: if indexPosition < 0 in one coordinate, return header
QModelIndex index = view()->indexAt(indexPosition);
if (index.isValid()) {
return child(logicalIndex(index));
}
return 0;
}
int AccessibleInstanceView::childCount() const
{
if (!view()->model()) {
return 0;
}
return (view()->model()->rowCount()) * (view()->model()->columnCount());
}
int AccessibleInstanceView::indexOfChild(const QAccessibleInterface *iface) const
{
if (!view()->model())
return -1;
QAccessibleInterface *parent = iface->parent();
if (parent->object() != view())
return -1;
Q_ASSERT(iface->role() != QAccessible::TreeItem); // should be handled by tree class
if (iface->role() == QAccessible::Cell || iface->role() == QAccessible::ListItem) {
const AccessibleInstanceViewItem* cell = static_cast<const AccessibleInstanceViewItem*>(iface);
return logicalIndex(cell->m_index);
} else if (iface->role() == QAccessible::Pane) {
return 0; // corner button
} else {
qWarning() << "AccessibleInstanceView::indexOfChild has a child with unknown role..." << iface->role() << iface->text(QAccessible::Name);
}
// FIXME: we are in denial of our children. this should stop.
return -1;
}
QString AccessibleInstanceView::text(QAccessible::Text t) const
{
if (t == QAccessible::Description)
return view()->accessibleDescription();
return view()->accessibleName();
}
QRect AccessibleInstanceView::rect() const
{
if (!view()->isVisible())
return QRect();
QPoint pos = view()->mapToGlobal(QPoint(0, 0));
return QRect(pos.x(), pos.y(), view()->width(), view()->height());
}
QAccessibleInterface *AccessibleInstanceView::parent() const
{
if (view() && view()->parent()) {
if (qstrcmp("QComboBoxPrivateContainer", view()->parent()->metaObject()->className()) == 0) {
return QAccessible::queryAccessibleInterface(view()->parent()->parent());
}
return QAccessible::queryAccessibleInterface(view()->parent());
}
return 0;
}
QAccessibleInterface *AccessibleInstanceView::child(int logicalIndex) const
{
if (!view()->model())
return 0;
auto id = childToId.constFind(logicalIndex);
if (id != childToId.constEnd())
return QAccessible::accessibleInterface(id.value());
int columns = view()->model()->columnCount();
int row = logicalIndex / columns;
int column = logicalIndex % columns;
QAccessibleInterface *iface = 0;
QModelIndex index = view()->model()->index(row, column, view()->rootIndex());
if (Q_UNLIKELY(!index.isValid())) {
qWarning("AccessibleInstanceView::child: Invalid index at: %d %d", row, column);
return 0;
}
iface = new AccessibleInstanceViewItem(view(), index);
QAccessible::registerAccessibleInterface(iface);
childToId.insert(logicalIndex, QAccessible::uniqueId(iface));
return iface;
}
void *AccessibleInstanceView::interface_cast(QAccessible::InterfaceType t)
{
if (t == QAccessible::TableInterface)
return static_cast<QAccessibleTableInterface*>(this);
return 0;
}
void AccessibleInstanceView::modelChange(QAccessibleTableModelChangeEvent *event)
{
// if there is no cache yet, we don't update anything
if (childToId.isEmpty())
return;
switch (event->modelChangeType()) {
case QAccessibleTableModelChangeEvent::ModelReset:
for (QAccessible::Id id : childToId)
QAccessible::deleteAccessibleInterface(id);
childToId.clear();
break;
// rows are inserted: move every row after that
case QAccessibleTableModelChangeEvent::RowsInserted:
case QAccessibleTableModelChangeEvent::ColumnsInserted: {
ChildCache newCache;
ChildCache::ConstIterator iter = childToId.constBegin();
while (iter != childToId.constEnd()) {
QAccessible::Id id = iter.value();
QAccessibleInterface *iface = QAccessible::accessibleInterface(id);
Q_ASSERT(iface);
if (indexOfChild(iface) >= 0) {
newCache.insert(indexOfChild(iface), id);
} else {
// ### This should really not happen,
// but it might if the view has a root index set.
// This needs to be fixed.
QAccessible::deleteAccessibleInterface(id);
}
++iter;
}
childToId = newCache;
break;
}
case QAccessibleTableModelChangeEvent::ColumnsRemoved:
case QAccessibleTableModelChangeEvent::RowsRemoved: {
ChildCache newCache;
ChildCache::ConstIterator iter = childToId.constBegin();
while (iter != childToId.constEnd()) {
QAccessible::Id id = iter.value();
QAccessibleInterface *iface = QAccessible::accessibleInterface(id);
Q_ASSERT(iface);
if (iface->role() == QAccessible::Cell || iface->role() == QAccessible::ListItem) {
Q_ASSERT(iface->tableCellInterface());
AccessibleInstanceViewItem *cell = static_cast<AccessibleInstanceViewItem*>(iface->tableCellInterface());
// Since it is a QPersistentModelIndex, we only need to check if it is valid
if (cell->m_index.isValid())
newCache.insert(indexOfChild(cell), id);
else
QAccessible::deleteAccessibleInterface(id);
}
++iter;
}
childToId = newCache;
break;
}
case QAccessibleTableModelChangeEvent::DataChanged:
// nothing to do in this case
break;
}
}
// TABLE CELL
AccessibleInstanceViewItem::AccessibleInstanceViewItem(QAbstractItemView *view_, const QModelIndex &index_)
: view(view_), m_index(index_)
{
if (Q_UNLIKELY(!index_.isValid()))
qWarning() << "AccessibleInstanceViewItem::AccessibleInstanceViewItem with invalid index: " << index_;
}
void *AccessibleInstanceViewItem::interface_cast(QAccessible::InterfaceType t)
{
if (t == QAccessible::TableCellInterface)
return static_cast<QAccessibleTableCellInterface*>(this);
if (t == QAccessible::ActionInterface)
return static_cast<QAccessibleActionInterface*>(this);
return 0;
}
int AccessibleInstanceViewItem::columnExtent() const { return 1; }
int AccessibleInstanceViewItem::rowExtent() const { return 1; }
QList<QAccessibleInterface*> AccessibleInstanceViewItem::rowHeaderCells() const
{
return {};
}
QList<QAccessibleInterface*> AccessibleInstanceViewItem::columnHeaderCells() const
{
return {};
}
int AccessibleInstanceViewItem::columnIndex() const
{
if (!isValid()) {
return -1;
}
return m_index.column();
}
int AccessibleInstanceViewItem::rowIndex() const
{
if (!isValid()) {
return -1;
}
return m_index.row();
}
bool AccessibleInstanceViewItem::isSelected() const
{
if (!isValid()) {
return false;
}
return view->selectionModel()->isSelected(m_index);
}
QStringList AccessibleInstanceViewItem::actionNames() const
{
QStringList names;
names << toggleAction();
return names;
}
void AccessibleInstanceViewItem::doAction(const QString& actionName)
{
if (actionName == toggleAction()) {
if (isSelected()) {
unselectCell();
}
else {
selectCell();
}
}
}
QStringList AccessibleInstanceViewItem::keyBindingsForAction(const QString &) const
{
return QStringList();
}
void AccessibleInstanceViewItem::selectCell()
{
if (!isValid()) {
return;
}
QAbstractItemView::SelectionMode selectionMode = view->selectionMode();
if (selectionMode == QAbstractItemView::NoSelection) {
return;
}
Q_ASSERT(table());
QAccessibleTableInterface *cellTable = table()->tableInterface();
switch (view->selectionBehavior()) {
case QAbstractItemView::SelectItems:
break;
case QAbstractItemView::SelectColumns:
if (cellTable)
cellTable->selectColumn(m_index.column());
return;
case QAbstractItemView::SelectRows:
if (cellTable)
cellTable->selectRow(m_index.row());
return;
}
if (selectionMode == QAbstractItemView::SingleSelection) {
view->clearSelection();
}
view->selectionModel()->select(m_index, QItemSelectionModel::Select);
}
void AccessibleInstanceViewItem::unselectCell()
{
if (!isValid())
return;
QAbstractItemView::SelectionMode selectionMode = view->selectionMode();
if (selectionMode == QAbstractItemView::NoSelection)
return;
QAccessibleTableInterface *cellTable = table()->tableInterface();
switch (view->selectionBehavior()) {
case QAbstractItemView::SelectItems:
break;
case QAbstractItemView::SelectColumns:
if (cellTable)
cellTable->unselectColumn(m_index.column());
return;
case QAbstractItemView::SelectRows:
if (cellTable)
cellTable->unselectRow(m_index.row());
return;
}
//If the mode is not MultiSelection or ExtendedSelection and only
//one cell is selected it cannot be unselected by the user
if ((selectionMode != QAbstractItemView::MultiSelection) && (selectionMode != QAbstractItemView::ExtendedSelection) && (view->selectionModel()->selectedIndexes().count() <= 1))
return;
view->selectionModel()->select(m_index, QItemSelectionModel::Deselect);
}
QAccessibleInterface *AccessibleInstanceViewItem::table() const
{
return QAccessible::queryAccessibleInterface(view);
}
QAccessible::Role AccessibleInstanceViewItem::role() const
{
return QAccessible::ListItem;
}
QAccessible::State AccessibleInstanceViewItem::state() const
{
QAccessible::State st;
if (!isValid())
return st;
QRect globalRect = view->rect();
globalRect.translate(view->mapToGlobal(QPoint(0,0)));
if (!globalRect.intersects(rect()))
st.invisible = true;
if (view->selectionModel()->isSelected(m_index))
st.selected = true;
if (view->selectionModel()->currentIndex() == m_index)
st.focused = true;
if (m_index.model()->data(m_index, Qt::CheckStateRole).toInt() == Qt::Checked)
st.checked = true;
Qt::ItemFlags flags = m_index.flags();
if (flags & Qt::ItemIsSelectable) {
st.selectable = true;
st.focusable = true;
if (view->selectionMode() == QAbstractItemView::MultiSelection)
st.multiSelectable = true;
if (view->selectionMode() == QAbstractItemView::ExtendedSelection)
st.extSelectable = true;
}
return st;
}
QRect AccessibleInstanceViewItem::rect() const
{
QRect r;
if (!isValid())
return r;
r = view->visualRect(m_index);
if (!r.isNull()) {
r.translate(view->viewport()->mapTo(view, QPoint(0,0)));
r.translate(view->mapToGlobal(QPoint(0, 0)));
}
return r;
}
QString AccessibleInstanceViewItem::text(QAccessible::Text t) const
{
QString value;
if (!isValid())
return value;
QAbstractItemModel *model = view->model();
switch (t) {
case QAccessible::Name:
value = model->data(m_index, Qt::AccessibleTextRole).toString();
if (value.isEmpty())
value = model->data(m_index, Qt::DisplayRole).toString();
break;
case QAccessible::Description:
value = model->data(m_index, Qt::AccessibleDescriptionRole).toString();
break;
default:
break;
}
return value;
}
void AccessibleInstanceViewItem::setText(QAccessible::Text /*t*/, const QString &text)
{
if (!isValid() || !(m_index.flags() & Qt::ItemIsEditable))
return;
view->model()->setData(m_index, text);
}
bool AccessibleInstanceViewItem::isValid() const
{
return view && view->model() && m_index.isValid();
}
QAccessibleInterface *AccessibleInstanceViewItem::parent() const
{
return QAccessible::queryAccessibleInterface(view);
}
QAccessibleInterface *AccessibleInstanceViewItem::child(int) const
{
return 0;
}
#endif /* !QT_NO_ACCESSIBILITY */