| /* |
| * Copyright (C) 2008 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of Apple Inc. ("Apple") nor the names of |
| * its contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "AccessibilityTable.h" |
| |
| #include "AXObjectCache.h" |
| #include "AccessibilityTableCell.h" |
| #include "AccessibilityTableColumn.h" |
| #include "AccessibilityTableHeaderContainer.h" |
| #include "AccessibilityTableRow.h" |
| #include "ElementIterator.h" |
| #include "HTMLNames.h" |
| #include "HTMLTableCaptionElement.h" |
| #include "HTMLTableCellElement.h" |
| #include "HTMLTableElement.h" |
| #include "HTMLTableSectionElement.h" |
| #include "RenderObject.h" |
| #include "RenderTable.h" |
| #include "RenderTableCell.h" |
| #include "RenderTableSection.h" |
| #include <wtf/Deque.h> |
| |
| namespace WebCore { |
| |
| using namespace HTMLNames; |
| |
| AccessibilityTable::AccessibilityTable(RenderObject* renderer) |
| : AccessibilityRenderObject(renderer) |
| , m_headerContainer(nullptr) |
| , m_isExposable(true) |
| { |
| } |
| |
| AccessibilityTable::~AccessibilityTable() = default; |
| |
| void AccessibilityTable::init() |
| { |
| AccessibilityRenderObject::init(); |
| m_isExposable = computeIsTableExposableThroughAccessibility(); |
| } |
| |
| Ref<AccessibilityTable> AccessibilityTable::create(RenderObject* renderer) |
| { |
| return adoptRef(*new AccessibilityTable(renderer)); |
| } |
| |
| bool AccessibilityTable::hasARIARole() const |
| { |
| if (!m_renderer) |
| return false; |
| |
| AccessibilityRole ariaRole = ariaRoleAttribute(); |
| if (ariaRole != AccessibilityRole::Unknown) |
| return true; |
| |
| return false; |
| } |
| |
| bool AccessibilityTable::isExposable() const |
| { |
| if (!m_renderer) |
| return false; |
| |
| return m_isExposable; |
| } |
| |
| HTMLTableElement* AccessibilityTable::tableElement() const |
| { |
| if (!is<RenderTable>(*m_renderer)) |
| return nullptr; |
| |
| RenderTable& table = downcast<RenderTable>(*m_renderer); |
| if (is<HTMLTableElement>(table.element())) |
| return downcast<HTMLTableElement>(table.element()); |
| // Try to find the table element, when the AccessibilityTable is mapped to an anonymous table renderer. |
| auto* firstChild = table.firstChild(); |
| if (!firstChild || !firstChild->node()) |
| return nullptr; |
| if (is<HTMLTableElement>(*firstChild->node())) |
| return downcast<HTMLTableElement>(firstChild->node()); |
| // FIXME: This might find an unrelated parent table element. |
| return ancestorsOfType<HTMLTableElement>(*(firstChild->node())).first(); |
| } |
| |
| bool AccessibilityTable::isDataTable() const |
| { |
| if (!m_renderer) |
| return false; |
| |
| // Do not consider it a data table is it has an ARIA role. |
| if (hasARIARole()) |
| return false; |
| |
| // When a section of the document is contentEditable, all tables should be |
| // treated as data tables, otherwise users may not be able to work with rich |
| // text editors that allow creating and editing tables. |
| if (node() && node()->hasEditableStyle()) |
| return true; |
| |
| if (!is<RenderTable>(*m_renderer)) |
| return false; |
| |
| // This employs a heuristic to determine if this table should appear. |
| // Only "data" tables should be exposed as tables. |
| // Unfortunately, there is no good way to determine the difference |
| // between a "layout" table and a "data" table. |
| if (HTMLTableElement* tableElement = this->tableElement()) { |
| // If there is a caption element, summary, THEAD, or TFOOT section, it's most certainly a data table. |
| if (!tableElement->summary().isEmpty() || tableElement->tHead() || tableElement->tFoot() || tableElement->caption()) |
| return true; |
| |
| // If someone used "rules" attribute than the table should appear. |
| if (!tableElement->rules().isEmpty()) |
| return true; |
| |
| // If there's a colgroup or col element, it's probably a data table. |
| for (const auto& child : childrenOfType<HTMLElement>(*tableElement)) { |
| if (child.hasTagName(colTag) || child.hasTagName(colgroupTag)) |
| return true; |
| } |
| } |
| |
| // The following checks should only apply if this is a real <table> element. |
| if (!hasTagName(tableTag)) |
| return false; |
| |
| // If the author has used ARIA to specify a valid column or row count, assume they |
| // want us to treat the table as a data table. |
| int axColumnCount = getIntegralAttribute(aria_colcountAttr); |
| if (axColumnCount == -1 || axColumnCount > 0) |
| return true; |
| |
| int axRowCount = getIntegralAttribute(aria_rowcountAttr); |
| if (axRowCount == -1 || axRowCount > 0) |
| return true; |
| |
| RenderTable& table = downcast<RenderTable>(*m_renderer); |
| // go through the cell's and check for tell-tale signs of "data" table status |
| // cells have borders, or use attributes like headers, abbr, scope or axis |
| table.recalcSectionsIfNeeded(); |
| RenderTableSection* firstBody = table.firstBody(); |
| if (!firstBody) |
| return false; |
| |
| int numCols = firstBody->numColumns(); |
| int numRows = firstBody->numRows(); |
| |
| // If there are at least 20 rows, we'll call it a data table. |
| if ((numRows >= 20 && numCols >= 2) || (numRows >= 2 && numCols >= 20)) |
| return true; |
| |
| // Store the background color of the table to check against cell's background colors. |
| const RenderStyle& tableStyle = table.style(); |
| Color tableBGColor = tableStyle.visitedDependentColor(CSSPropertyBackgroundColor); |
| |
| // check enough of the cells to find if the table matches our criteria |
| // Criteria: |
| // 1) must have at least one valid cell (and) |
| // 2) at least half of cells have borders (or) |
| // 3) at least half of cells have different bg colors than the table, and there is cell spacing (or) |
| // 4) the valid cell has an ARIA cell-related property |
| unsigned validCellCount = 0; |
| unsigned borderedCellCount = 0; |
| unsigned backgroundDifferenceCellCount = 0; |
| unsigned cellsWithTopBorder = 0; |
| unsigned cellsWithBottomBorder = 0; |
| unsigned cellsWithLeftBorder = 0; |
| unsigned cellsWithRightBorder = 0; |
| |
| Color alternatingRowColors[5]; |
| int alternatingRowColorCount = 0; |
| |
| int headersInFirstColumnCount = 0; |
| for (int row = 0; row < numRows; ++row) { |
| |
| int headersInFirstRowCount = 0; |
| for (int col = 0; col < numCols; ++col) { |
| RenderTableCell* cell = firstBody->primaryCellAt(row, col); |
| if (!cell) |
| continue; |
| |
| Element* cellElement = cell->element(); |
| if (!cellElement) |
| continue; |
| |
| if (cell->width() < 1 || cell->height() < 1) |
| continue; |
| |
| ++validCellCount; |
| |
| bool isTHCell = cellElement->hasTagName(thTag); |
| // If the first row is comprised of all <th> tags, assume it is a data table. |
| if (!row && isTHCell) |
| ++headersInFirstRowCount; |
| |
| // If the first column is comprised of all <th> tags, assume it is a data table. |
| if (!col && isTHCell) |
| ++headersInFirstColumnCount; |
| |
| // In this case, the developer explicitly assigned a "data" table attribute. |
| if (is<HTMLTableCellElement>(*cellElement)) { |
| HTMLTableCellElement& tableCellElement = downcast<HTMLTableCellElement>(*cellElement); |
| if (!tableCellElement.headers().isEmpty() || !tableCellElement.abbr().isEmpty() |
| || !tableCellElement.axis().isEmpty() || !tableCellElement.scope().isEmpty()) |
| return true; |
| } |
| |
| // If the author has used ARIA to specify a valid column or row index, assume they want us |
| // to treat the table as a data table. |
| int axColumnIndex = cellElement->getIntegralAttribute(aria_colindexAttr); |
| if (axColumnIndex >= 1) |
| return true; |
| |
| int axRowIndex = cellElement->getIntegralAttribute(aria_rowindexAttr); |
| if (axRowIndex >= 1) |
| return true; |
| |
| if (auto cellParentElement = cellElement->parentElement()) { |
| axRowIndex = cellParentElement->getIntegralAttribute(aria_rowindexAttr); |
| if (axRowIndex >= 1) |
| return true; |
| } |
| |
| // If the author has used ARIA to specify a column or row span, we're supposed to ignore |
| // the value for the purposes of exposing the span. But assume they want us to treat the |
| // table as a data table. |
| int axColumnSpan = cellElement->getIntegralAttribute(aria_colspanAttr); |
| if (axColumnSpan >= 1) |
| return true; |
| |
| int axRowSpan = cellElement->getIntegralAttribute(aria_rowspanAttr); |
| if (axRowSpan >= 1) |
| return true; |
| |
| const RenderStyle& renderStyle = cell->style(); |
| |
| // If the empty-cells style is set, we'll call it a data table. |
| if (renderStyle.emptyCells() == EmptyCell::Hide) |
| return true; |
| |
| // If a cell has matching bordered sides, call it a (fully) bordered cell. |
| if ((cell->borderTop() > 0 && cell->borderBottom() > 0) |
| || (cell->borderLeft() > 0 && cell->borderRight() > 0)) |
| ++borderedCellCount; |
| |
| // Also keep track of each individual border, so we can catch tables where most |
| // cells have a bottom border, for example. |
| if (cell->borderTop() > 0) |
| ++cellsWithTopBorder; |
| if (cell->borderBottom() > 0) |
| ++cellsWithBottomBorder; |
| if (cell->borderLeft() > 0) |
| ++cellsWithLeftBorder; |
| if (cell->borderRight() > 0) |
| ++cellsWithRightBorder; |
| |
| // If the cell has a different color from the table and there is cell spacing, |
| // then it is probably a data table cell (spacing and colors take the place of borders). |
| Color cellColor = renderStyle.visitedDependentColor(CSSPropertyBackgroundColor); |
| if (table.hBorderSpacing() > 0 && table.vBorderSpacing() > 0 |
| && tableBGColor != cellColor && cellColor.alphaByte() != 1) // FIXME (https://bugs.webkit.org/show_bug.cgi?id=214537): This comparison to 1 is likely incorrect. It likely should be checking !cellColor.isOpaque(). |
| ++backgroundDifferenceCellCount; |
| |
| // If we've found 10 "good" cells, we don't need to keep searching. |
| if (borderedCellCount >= 10 || backgroundDifferenceCellCount >= 10) |
| return true; |
| |
| // For the first 5 rows, cache the background color so we can check if this table has zebra-striped rows. |
| if (row < 5 && row == alternatingRowColorCount) { |
| RenderElement* renderRow = cell->parent(); |
| if (!is<RenderTableRow>(renderRow)) |
| continue; |
| const RenderStyle& rowRenderStyle = renderRow->style(); |
| Color rowColor = rowRenderStyle.visitedDependentColor(CSSPropertyBackgroundColor); |
| alternatingRowColors[alternatingRowColorCount] = rowColor; |
| ++alternatingRowColorCount; |
| } |
| } |
| |
| if (!row && headersInFirstRowCount == numCols && numCols > 1) |
| return true; |
| } |
| |
| if (headersInFirstColumnCount == numRows && numRows > 1) |
| return true; |
| |
| // if there is less than two valid cells, it's not a data table |
| if (validCellCount <= 1) |
| return false; |
| |
| // half of the cells had borders, it's a data table |
| unsigned neededCellCount = validCellCount / 2; |
| if (borderedCellCount >= neededCellCount |
| || cellsWithTopBorder >= neededCellCount |
| || cellsWithBottomBorder >= neededCellCount |
| || cellsWithLeftBorder >= neededCellCount |
| || cellsWithRightBorder >= neededCellCount) |
| return true; |
| |
| // half had different background colors, it's a data table |
| if (backgroundDifferenceCellCount >= neededCellCount) |
| return true; |
| |
| // Check if there is an alternating row background color indicating a zebra striped style pattern. |
| if (alternatingRowColorCount > 2) { |
| Color firstColor = alternatingRowColors[0]; |
| for (int k = 1; k < alternatingRowColorCount; k++) { |
| // If an odd row was the same color as the first row, its not alternating. |
| if (k % 2 == 1 && alternatingRowColors[k] == firstColor) |
| return false; |
| // If an even row is not the same as the first row, its not alternating. |
| if (!(k % 2) && alternatingRowColors[k] != firstColor) |
| return false; |
| } |
| return true; |
| } |
| |
| return false; |
| } |
| |
| bool AccessibilityTable::computeIsTableExposableThroughAccessibility() const |
| { |
| // The following is a heuristic used to determine if a |
| // <table> should be exposed as an AXTable. The goal |
| // is to only show "data" tables. |
| |
| if (!m_renderer) |
| return false; |
| |
| // If the developer assigned an aria role to this, then we |
| // shouldn't expose it as a table, unless, of course, the aria |
| // role is a table. |
| if (hasARIARole()) |
| return false; |
| |
| return isDataTable(); |
| } |
| |
| |
| void AccessibilityTable::recomputeIsExposable() |
| { |
| bool previouslyExposable = m_isExposable; |
| m_isExposable = computeIsTableExposableThroughAccessibility(); |
| if (previouslyExposable != m_isExposable) { |
| // A table's role value is dependent on whether it's exposed, so notify the cache this has changed. |
| if (auto* cache = axObjectCache()) |
| cache->handleRoleChange(this); |
| |
| // Before resetting our existing children, possibly losing references to them, ensure we update their role (since a table cell's role is dependent on whether its parent table is exposable). |
| updateChildrenRoles(); |
| |
| m_childrenDirty = true; |
| } |
| } |
| |
| void AccessibilityTable::updateChildrenRoles() |
| { |
| for (const auto& row : m_rows) { |
| for (const auto& cell : row->children()) |
| downcast<AccessibilityObject>(*cell).updateRole(); |
| } |
| } |
| |
| void AccessibilityTable::clearChildren() |
| { |
| AccessibilityRenderObject::clearChildren(); |
| m_rows.clear(); |
| m_columns.clear(); |
| |
| if (m_headerContainer) { |
| m_headerContainer->detachFromParent(); |
| m_headerContainer = nullptr; |
| } |
| } |
| |
| void AccessibilityTable::addChildren() |
| { |
| if (!isExposable()) { |
| AccessibilityRenderObject::addChildren(); |
| return; |
| } |
| |
| ASSERT(!m_childrenInitialized); |
| |
| m_childrenInitialized = true; |
| if (!is<RenderTable>(renderer())) |
| return; |
| |
| RenderTable& table = downcast<RenderTable>(*m_renderer); |
| // Go through all the available sections to pull out the rows and add them as children. |
| table.recalcSectionsIfNeeded(); |
| |
| if (HTMLTableElement* tableElement = this->tableElement()) { |
| if (auto caption = tableElement->caption()) { |
| AccessibilityObject* axCaption = axObjectCache()->getOrCreate(caption.get()); |
| addChild(axCaption, DescendIfIgnored::No); |
| } |
| } |
| |
| unsigned maxColumnCount = 0; |
| RenderTableSection* footer = table.footer(); |
| |
| for (RenderTableSection* tableSection = table.topSection(); tableSection; tableSection = table.sectionBelow(tableSection, SkipEmptySections)) { |
| if (tableSection == footer) |
| continue; |
| addChildrenFromSection(tableSection, maxColumnCount); |
| } |
| |
| // Process the footer last, in case it was ordered earlier in the DOM. |
| if (footer) |
| addChildrenFromSection(footer, maxColumnCount); |
| |
| AXObjectCache* axCache = m_renderer->document().axObjectCache(); |
| // make the columns based on the number of columns in the first body |
| unsigned length = maxColumnCount; |
| for (unsigned i = 0; i < length; ++i) { |
| auto& column = downcast<AccessibilityTableColumn>(*axCache->create(AccessibilityRole::Column)); |
| column.setColumnIndex(i); |
| column.setParent(this); |
| m_columns.append(&column); |
| addChild(&column, DescendIfIgnored::No); |
| } |
| addChild(headerContainer(), DescendIfIgnored::No); |
| |
| // Sometimes the cell gets the wrong role initially because it is created before the parent |
| // determines whether it is an accessibility table. Iterate all the cells and allow them to |
| // update their roles now that the table knows its status. |
| // see bug: https://bugs.webkit.org/show_bug.cgi?id=147001 |
| updateChildrenRoles(); |
| } |
| |
| void AccessibilityTable::addTableCellChild(AccessibilityObject* rowObject, HashSet<AccessibilityObject*>& appendedRows, unsigned& columnCount) |
| { |
| if (!rowObject || !is<AccessibilityTableRow>(*rowObject)) |
| return; |
| |
| auto& row = downcast<AccessibilityTableRow>(*rowObject); |
| // We need to check every cell for a new row, because cell spans |
| // can cause us to miss rows if we just check the first column. |
| if (appendedRows.contains(&row)) |
| return; |
| |
| row.setRowIndex(static_cast<int>(m_rows.size())); |
| m_rows.append(&row); |
| addChild(&row, DescendIfIgnored::No); |
| appendedRows.add(&row); |
| |
| // store the maximum number of columns |
| unsigned rowCellCount = row.children().size(); |
| if (rowCellCount > columnCount) |
| columnCount = rowCellCount; |
| } |
| |
| void AccessibilityTable::addChildrenFromSection(RenderTableSection* tableSection, unsigned& maxColumnCount) |
| { |
| ASSERT(tableSection); |
| if (!tableSection) |
| return; |
| |
| AXObjectCache* axCache = m_renderer->document().axObjectCache(); |
| HashSet<AccessibilityObject*> appendedRows; |
| unsigned numRows = tableSection->numRows(); |
| for (unsigned rowIndex = 0; rowIndex < numRows; ++rowIndex) { |
| |
| RenderTableRow* renderRow = tableSection->rowRendererAt(rowIndex); |
| if (!renderRow) |
| continue; |
| |
| AccessibilityObject& rowObject = *axCache->getOrCreate(renderRow); |
| |
| // If the row is anonymous, we should dive deeper into the descendants to try to find a valid row. |
| if (renderRow->isAnonymous()) { |
| Deque<AccessibilityObject*> queue; |
| queue.append(&rowObject); |
| |
| while (!queue.isEmpty()) { |
| AccessibilityObject* obj = queue.takeFirst(); |
| if (obj->node() && is<AccessibilityTableRow>(*obj)) { |
| addTableCellChild(obj, appendedRows, maxColumnCount); |
| continue; |
| } |
| for (auto* child = obj->firstChild(); child; child = child->nextSibling()) |
| queue.append(child); |
| } |
| } else |
| addTableCellChild(&rowObject, appendedRows, maxColumnCount); |
| } |
| |
| maxColumnCount = std::max(tableSection->numColumns(), maxColumnCount); |
| } |
| |
| AXCoreObject* AccessibilityTable::headerContainer() |
| { |
| if (m_headerContainer) |
| return m_headerContainer.get(); |
| |
| auto& tableHeader = downcast<AccessibilityMockObject>(*axObjectCache()->create(AccessibilityRole::TableHeaderContainer)); |
| tableHeader.setParent(this); |
| |
| m_headerContainer = &tableHeader; |
| return m_headerContainer.get(); |
| } |
| |
| AXCoreObject::AccessibilityChildrenVector AccessibilityTable::columns() |
| { |
| updateChildrenIfNecessary(); |
| |
| return m_columns; |
| } |
| |
| AXCoreObject::AccessibilityChildrenVector AccessibilityTable::rows() |
| { |
| updateChildrenIfNecessary(); |
| |
| return m_rows; |
| } |
| |
| AXCoreObject::AccessibilityChildrenVector AccessibilityTable::columnHeaders() |
| { |
| AccessibilityChildrenVector headers; |
| if (!m_renderer) |
| return headers; |
| |
| updateChildrenIfNecessary(); |
| |
| // Sometimes m_columns can be reset during the iteration, we cache it here to be safe. |
| AccessibilityChildrenVector columnsCopy = m_columns; |
| |
| for (const auto& column : columnsCopy) { |
| if (auto* header = column->columnHeader()) |
| headers.append(header); |
| } |
| |
| return headers; |
| } |
| |
| AXCoreObject::AccessibilityChildrenVector AccessibilityTable::rowHeaders() |
| { |
| AccessibilityChildrenVector headers; |
| if (!m_renderer) |
| return headers; |
| |
| updateChildrenIfNecessary(); |
| |
| // Sometimes m_rows can be reset during the iteration, we cache it here to be safe. |
| AccessibilityChildrenVector rowsCopy = m_rows; |
| |
| for (const auto& row : rowsCopy) { |
| if (AXCoreObject* header = downcast<AccessibilityTableRow>(*row).headerObject()) |
| headers.append(header); |
| } |
| |
| return headers; |
| } |
| |
| AXCoreObject::AccessibilityChildrenVector AccessibilityTable::visibleRows() |
| { |
| AccessibilityChildrenVector rows; |
| if (!m_renderer) |
| return rows; |
| |
| updateChildrenIfNecessary(); |
| |
| for (const auto& row : m_rows) { |
| if (row && !row->isOffScreen()) |
| rows.append(row); |
| } |
| |
| return rows; |
| } |
| |
| AXCoreObject::AccessibilityChildrenVector AccessibilityTable::cells() |
| { |
| AccessibilityChildrenVector cells; |
| if (!m_renderer) |
| return cells; |
| |
| updateChildrenIfNecessary(); |
| |
| for (const auto& row : m_rows) |
| cells.appendVector(row->children()); |
| |
| return cells; |
| } |
| |
| unsigned AccessibilityTable::columnCount() |
| { |
| updateChildrenIfNecessary(); |
| |
| return m_columns.size(); |
| } |
| |
| unsigned AccessibilityTable::rowCount() |
| { |
| updateChildrenIfNecessary(); |
| |
| return m_rows.size(); |
| } |
| |
| int AccessibilityTable::tableLevel() const |
| { |
| int level = 0; |
| for (AccessibilityObject* obj = static_cast<AccessibilityObject*>(const_cast<AccessibilityTable*>(this)); obj; obj = obj->parentObject()) { |
| if (is<AccessibilityTable>(*obj) && downcast<AccessibilityTable>(*obj).isExposable()) |
| ++level; |
| } |
| |
| return level; |
| } |
| |
| AXCoreObject* AccessibilityTable::cellForColumnAndRow(unsigned column, unsigned row) |
| { |
| updateChildrenIfNecessary(); |
| if (column >= columnCount() || row >= rowCount()) |
| return nullptr; |
| |
| // Iterate backwards through the rows in case the desired cell has a rowspan and exists in a previous row. |
| for (unsigned rowIndexCounter = row + 1; rowIndexCounter > 0; --rowIndexCounter) { |
| unsigned rowIndex = rowIndexCounter - 1; |
| const auto& children = m_rows[rowIndex]->children(); |
| // Since some cells may have colspans, we have to check the actual range of each |
| // cell to determine which is the right one. |
| for (unsigned colIndexCounter = std::min(static_cast<unsigned>(children.size()), column + 1); colIndexCounter > 0; --colIndexCounter) { |
| unsigned colIndex = colIndexCounter - 1; |
| AXCoreObject* child = children[colIndex].get(); |
| if (!child) |
| continue; |
| |
| auto columnRange = child->columnIndexRange(); |
| auto rowRange = child->rowIndexRange(); |
| |
| if ((column >= columnRange.first && column < (columnRange.first + columnRange.second)) |
| && (row >= rowRange.first && row < (rowRange.first + rowRange.second))) |
| return child; |
| } |
| } |
| |
| return nullptr; |
| } |
| |
| AccessibilityRole AccessibilityTable::roleValue() const |
| { |
| if (!isExposable()) |
| return AccessibilityRenderObject::roleValue(); |
| |
| AccessibilityRole ariaRole = ariaRoleAttribute(); |
| if (ariaRole == AccessibilityRole::Grid || ariaRole == AccessibilityRole::TreeGrid) |
| return ariaRole; |
| |
| return AccessibilityRole::Table; |
| } |
| |
| bool AccessibilityTable::computeAccessibilityIsIgnored() const |
| { |
| AccessibilityObjectInclusion decision = defaultObjectInclusion(); |
| if (decision == AccessibilityObjectInclusion::IncludeObject) |
| return false; |
| if (decision == AccessibilityObjectInclusion::IgnoreObject) |
| return true; |
| |
| if (!isExposable()) |
| return AccessibilityRenderObject::computeAccessibilityIsIgnored(); |
| |
| return false; |
| } |
| |
| void AccessibilityTable::titleElementText(Vector<AccessibilityText>& textOrder) const |
| { |
| String title = this->title(); |
| if (!title.isEmpty()) |
| textOrder.append(AccessibilityText(title, AccessibilityTextSource::LabelByElement)); |
| } |
| |
| String AccessibilityTable::title() const |
| { |
| if (!isExposable()) |
| return AccessibilityRenderObject::title(); |
| |
| String title; |
| if (!m_renderer) |
| return title; |
| |
| // see if there is a caption |
| Node* tableElement = m_renderer->node(); |
| if (is<HTMLTableElement>(tableElement)) { |
| if (auto caption = downcast<HTMLTableElement>(*tableElement).caption()) |
| title = caption->innerText(); |
| } |
| |
| // try the standard |
| if (title.isEmpty()) |
| title = AccessibilityRenderObject::title(); |
| |
| return title; |
| } |
| |
| int AccessibilityTable::axColumnCount() const |
| { |
| int colCountInt = getIntegralAttribute(aria_colcountAttr); |
| // The ARIA spec states, "Authors must set the value of aria-colcount to an integer equal to the |
| // number of columns in the full table. If the total number of columns is unknown, authors must |
| // set the value of aria-colcount to -1 to indicate that the value should not be calculated by |
| // the user agent." If we have a valid value, make it available to platforms. |
| if (colCountInt == -1 || colCountInt >= (int)m_columns.size()) |
| return colCountInt; |
| |
| return 0; |
| } |
| |
| int AccessibilityTable::axRowCount() const |
| { |
| int rowCountInt = getIntegralAttribute(aria_rowcountAttr); |
| // The ARIA spec states, "Authors must set the value of aria-rowcount to an integer equal to the |
| // number of rows in the full table. If the total number of rows is unknown, authors must set |
| // the value of aria-rowcount to -1 to indicate that the value should not be calculated by the |
| // user agent." If we have a valid value, make it available to platforms. |
| if (rowCountInt == -1 || rowCountInt >= (int)m_rows.size()) |
| return rowCountInt; |
| |
| return 0; |
| } |
| |
| } // namespace WebCore |
