AccessibilityARIAGridCell.cpp   [plain text]

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#include "config.h"
#include "AccessibilityARIAGridCell.h"

#include "AccessibilityObject.h"
#include "AccessibilityTable.h"
#include "AccessibilityTableRow.h"

namespace WebCore {
    
AccessibilityARIAGridCell::AccessibilityARIAGridCell(RenderObject* renderer)
    : AccessibilityTableCell(renderer)
{
}

AccessibilityARIAGridCell::~AccessibilityARIAGridCell()
{
}

PassRefPtr<AccessibilityARIAGridCell> AccessibilityARIAGridCell::create(RenderObject* renderer)
{
    return adoptRef(new AccessibilityARIAGridCell(renderer));
}

AccessibilityTable* AccessibilityARIAGridCell::parentTable() const
{
    AccessibilityObject* parent = parentObjectUnignored();
    if (!parent)
        return nullptr;
    
    if (parent->isAccessibilityTable())
        return toAccessibilityTable(parent);

    // It could happen that we hadn't reached the parent table yet (in
    // case objects for rows were not ignoring accessibility) so for
    // that reason we need to run parentObjectUnignored once again.
    parent = parent->parentObjectUnignored();
    if (!parent || !parent->isAccessibilityTable())
        return nullptr;
    
    return toAccessibilityTable(parent);
}
    
void AccessibilityARIAGridCell::rowIndexRange(std::pair<unsigned, unsigned>& rowRange)
{
    AccessibilityObject* parent = parentObjectUnignored();
    if (!parent)
        return;

    if (parent->isTableRow()) {
        // We already got a table row, use its API.
        rowRange.first = toAccessibilityTableRow(parent)->rowIndex();
    } else if (parent->isAccessibilityTable()) {
        // We reached the parent table, so we need to inspect its
        // children to determine the row index for the cell in it.
        unsigned columnCount = toAccessibilityTable(parent)->columnCount();
        if (!columnCount)
            return;

        const auto& siblings = parent->children();
        unsigned childrenSize = siblings.size();
        for (unsigned k = 0; k < childrenSize; ++k) {
            if (siblings[k].get() == this) {
                rowRange.first = k / columnCount;
                break;
            }
        }
    }

    // as far as I can tell, grid cells cannot span rows
    rowRange.second = 1;
}

void AccessibilityARIAGridCell::columnIndexRange(std::pair<unsigned, unsigned>& columnRange)
{
    AccessibilityObject* parent = parentObjectUnignored();
    if (!parent)
        return;

    if (!parent->isTableRow() && !parent->isAccessibilityTable())
        return;

    const AccessibilityChildrenVector& siblings = parent->children();
    unsigned childrenSize = siblings.size();
    for (unsigned k = 0; k < childrenSize; ++k) {
        if (siblings[k].get() == this) {
            columnRange.first = k;
            break;
        }
    }
    
    // as far as I can tell, grid cells cannot span columns
    columnRange.second = 1;    
}
  
} // namespace WebCore