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macOS Accessibility: optimize table interface implementation

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Store row and column in the QMacAccessibilityElement when creating it so
that we can avoid linearly looking for ourselves in the parent's data.

Row elements have their m_rowIndex set, Column elements the
m_columnIndex, and elements representing a cell have both set. Cells
are not managed by the table.

Task-number: QTBUG-34337
Pick-to: 6.5
Change-Id: I319fad1f1fda0cfa4c0b95e9e16c25c87df04351
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
This commit is contained in:
Volker Hilsheimer 2023-04-07 18:44:30 +02:00
parent 11ae55e918
commit 042d753495
2 changed files with 57 additions and 43 deletions
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3
src/plugins/platforms/cocoa/qcocoaaccessibility.mm
View File

@ -117,7 +117,6 @@ static void populateRoleMap()
roleMap[QAccessible::ColumnHeader] = NSAccessibilityColumnRole;
roleMap[QAccessible::Row] = NSAccessibilityRowRole;
roleMap[QAccessible::RowHeader] = NSAccessibilityRowRole;
roleMap[QAccessible::Cell] = NSAccessibilityTextFieldRole;
roleMap[QAccessible::Button] = NSAccessibilityButtonRole;
roleMap[QAccessible::EditableText] = NSAccessibilityTextFieldRole;
roleMap[QAccessible::Link] = NSAccessibilityLinkRole;
@ -125,7 +124,7 @@ static void populateRoleMap()
roleMap[QAccessible::Splitter] = NSAccessibilitySplitGroupRole;
roleMap[QAccessible::List] = NSAccessibilityListRole;
roleMap[QAccessible::ListItem] = NSAccessibilityStaticTextRole;
roleMap[QAccessible::Cell] = NSAccessibilityStaticTextRole;
roleMap[QAccessible::Cell] = NSAccessibilityCellRole;
roleMap[QAccessible::Client] = NSAccessibilityGroupRole;
roleMap[QAccessible::Paragraph] = NSAccessibilityGroupRole;
roleMap[QAccessible::Section] = NSAccessibilityGroupRole;

97
src/plugins/platforms/cocoa/qcocoaaccessibilityelement.mm
View File

@ -80,6 +80,8 @@ static void convertLineOffset(QAccessibleTextInterface *text, int *line, int *of
@implementation QMacAccessibilityElement {
QAccessible::Id axid;
int m_rowIndex;
int m_columnIndex;
// used by NSAccessibilityTable
NSMutableArray<QMacAccessibilityElement *> *rows; // corresponds to accessibilityRows
@ -105,12 +107,25 @@ static void convertLineOffset(QAccessibleTextInterface *text, int *line, int *of
self = [super init];
if (self) {
axid = anId;
m_rowIndex = -1;
m_columnIndex = -1;
rows = nil;
columns = nil;
synthesizedRole = role;
QAccessibleInterface *iface = QAccessible::accessibleInterface(axid);
if (iface && iface->tableInterface() && !synthesizedRole)
[self updateTableModel];
// table: if this is not created as an element managed by the table, then
// it's either the table itself, or an element created for an already existing
// cell interface (or an element that's not at all related to a table).
if (!synthesizedRole) {
if (QAccessibleInterface *iface = QAccessible::accessibleInterface(axid)) {
if (iface->tableInterface()) {
[self updateTableModel];
} else if (const auto *cell = iface->tableCellInterface()) {
// if we create an element for a table cell, initialize it with row/column
m_rowIndex = cell->rowIndex();
m_columnIndex = cell->columnIndex();
}
}
}
}
return self;
@ -183,6 +198,10 @@ static void convertLineOffset(QAccessibleTextInterface *text, int *line, int *of
QMacAccessibilityElement *element =
[[QMacAccessibilityElement alloc] initWithId:axid role:role];
if (element) {
if (role == NSAccessibilityRowRole)
element->m_rowIndex = n;
else if (role == NSAccessibilityColumnRole)
element->m_columnIndex = n;
[array addObject:element];
[element release];
} else {
@ -320,25 +339,26 @@ static void convertLineOffset(QAccessibleTextInterface *text, int *line, int *of
} else if (synthesizedRole == NSAccessibilityRowRole) {
// axid matches the parent table axid so that we can easily find the parent table
// children of row are cell/any items
QMacAccessibilityElement *tableElement = [QMacAccessibilityElement elementWithId:axid];
Q_ASSERT(tableElement->rows);
NSUInteger rowIndex = [tableElement->rows indexOfObjectIdenticalTo:self];
Q_ASSERT(rowIndex != NSNotFound);
int numColumns = table->columnCount();
NSMutableArray<QMacAccessibilityElement *> *cells =
[NSMutableArray<QMacAccessibilityElement *> arrayWithCapacity:numColumns];
for (int i = 0; i < numColumns; ++i) {
QAccessibleInterface *cell = table->cellAt(rowIndex, i);
if (cell && cell->isValid()) {
QAccessible::Id cellId = QAccessible::uniqueId(cell);
QMacAccessibilityElement *element =
[QMacAccessibilityElement elementWithId:cellId];
if (element) {
[cells addObject:element];
Q_ASSERT(m_rowIndex >= 0);
if (!columns) {
const int numColumns = table->columnCount();
columns = [NSMutableArray<QMacAccessibilityElement *> arrayWithCapacity:numColumns];
for (int i = 0; i < numColumns; ++i) {
QAccessibleInterface *cell = table->cellAt(m_rowIndex, i);
if (cell && cell->isValid()) {
QAccessible::Id cellId = QAccessible::uniqueId(cell);
QMacAccessibilityElement *element =
[QMacAccessibilityElement elementWithId:cellId];
if (element) {
element->m_rowIndex = m_rowIndex;
element->m_columnIndex = i;
[columns insertObject:element atIndex:i];
}
}
}
[columns retain];
}
return NSAccessibilityUnignoredChildren(cells);
return NSAccessibilityUnignoredChildren(columns);
}
}
return QCocoaAccessible::unignoredChildren(iface);
@ -388,18 +408,19 @@ static void convertLineOffset(QAccessibleTextInterface *text, int *line, int *of
if (QAccessibleInterface *parent = iface->parent()) {
if (parent->tableInterface()) {
if (QAccessibleTableCellInterface *cell = iface->tableCellInterface()) {
// parent of cell should be row
QAccessible::Id parentId = QAccessible::uniqueId(parent);
QMacAccessibilityElement *tableElement =
[QMacAccessibilityElement elementWithId:parentId];
QAccessible::Id parentId = QAccessible::uniqueId(parent);
QMacAccessibilityElement *tableElement =
[QMacAccessibilityElement elementWithId:parentId];
const int rowIndex = cell->rowIndex();
if (tableElement->rows && int([tableElement->rows count]) > rowIndex) {
QMacAccessibilityElement *rowElement = tableElement->rows[rowIndex];
return NSAccessibilityUnignoredAncestor(rowElement);
}
}
// parent of cell should be row
int rowIndex = -1;
if (m_rowIndex >= 0 && m_columnIndex >= 0)
rowIndex = m_rowIndex;
else if (QAccessibleTableCellInterface *cell = iface->tableCellInterface())
rowIndex = cell->rowIndex();
Q_ASSERT(tableElement->rows && int([tableElement->rows count]) > rowIndex);
QMacAccessibilityElement *rowElement = tableElement->rows[rowIndex];
return NSAccessibilityUnignoredAncestor(rowElement);
}
if (parent->role() != QAccessible::Application) {
QAccessible::Id parentId = QAccessible::uniqueId(parent);
@ -436,10 +457,7 @@ static void convertLineOffset(QAccessibleTextInterface *text, int *line, int *of
int &row = isRow ? cellPos.ry() : cellPos.rx();
int &col = isRow ? cellPos.rx() : cellPos.ry();
QMacAccessibilityElement *tableElement =
[QMacAccessibilityElement elementWithId:axid];
NSArray *tracks = isRow ? tableElement->rows : tableElement->columns;
NSUInteger trackIndex = [tracks indexOfObjectIdenticalTo:self];
NSUInteger trackIndex = self.accessibilityIndex;
if (trackIndex != NSNotFound) {
row = int(trackIndex);
if (QAccessibleInterface *firstCell = table->cellAt(cellPos.y(), cellPos.x())) {
@ -808,13 +826,10 @@ static void convertLineOffset(QAccessibleTextInterface *text, int *line, int *of
// axid matches the parent table axid so that we can easily find the parent table
// children of row are cell/any items
if (QAccessibleTableInterface *table = iface->tableInterface()) {
QMacAccessibilityElement *tableElement = [QMacAccessibilityElement elementWithId:axid];
NSArray *track = synthesizedRole == NSAccessibilityRowRole
? tableElement->rows : tableElement->columns;
if (track) {
NSUInteger trackIndex = [track indexOfObjectIdenticalTo:self];
index = (NSInteger)trackIndex;
}
if (m_rowIndex >= 0)
index = NSInteger(m_rowIndex);
else if (m_columnIndex >= 0)
index = NSInteger(m_columnIndex);
}
}
}