150 lines
5.3 KiB
C++
150 lines
5.3 KiB
C++
/*
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* Copyright (C) 2009 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Apple Inc. ("Apple") nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "AccessibilityARIAGridRow.h"
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#include "AccessibilityObject.h"
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#include "AccessibilityTable.h"
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namespace WebCore {
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AccessibilityARIAGridRow::AccessibilityARIAGridRow(RenderObject* renderer)
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: AccessibilityTableRow(renderer)
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{
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}
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AccessibilityARIAGridRow::~AccessibilityARIAGridRow() = default;
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Ref<AccessibilityARIAGridRow> AccessibilityARIAGridRow::create(RenderObject* renderer)
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{
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return adoptRef(*new AccessibilityARIAGridRow(renderer));
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}
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bool AccessibilityARIAGridRow::isARIATreeGridRow() const
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{
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AccessibilityObject* parent = parentTable();
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if (!parent)
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return false;
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return parent->isTreeGrid();
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}
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AXCoreObject::AccessibilityChildrenVector AccessibilityARIAGridRow::disclosedRows()
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{
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AccessibilityChildrenVector disclosedRows;
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// The contiguous disclosed rows will be the rows in the table that
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// have an aria-level of plus 1 from this row.
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AccessibilityObject* parent = parentObjectUnignored();
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if (!is<AccessibilityTable>(*parent) || !downcast<AccessibilityTable>(*parent).isExposable())
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return disclosedRows;
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// Search for rows that match the correct level.
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// Only take the subsequent rows from this one that are +1 from this row's level.
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int index = rowIndex();
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if (index < 0)
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return disclosedRows;
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unsigned level = hierarchicalLevel();
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auto allRows = parent->rows();
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int rowCount = allRows.size();
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for (int k = index + 1; k < rowCount; ++k) {
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auto* row = allRows[k].get();
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// Stop at the first row that doesn't match the correct level.
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if (row->hierarchicalLevel() != level + 1)
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break;
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disclosedRows.append(row);
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}
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return disclosedRows;
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}
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AXCoreObject* AccessibilityARIAGridRow::disclosedByRow() const
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{
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// The row that discloses this one is the row in the table
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// that is aria-level subtract 1 from this row.
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AccessibilityObject* parent = parentObjectUnignored();
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if (!is<AccessibilityTable>(*parent) || !downcast<AccessibilityTable>(*parent).isExposable())
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return nullptr;
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// If the level is 1 or less, than nothing discloses this row.
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unsigned level = hierarchicalLevel();
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if (level <= 1)
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return nullptr;
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// Search for the previous row that matches the correct level.
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int index = rowIndex();
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auto allRows = parent->rows();
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int rowCount = allRows.size();
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if (index >= rowCount)
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return nullptr;
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for (int k = index - 1; k >= 0; --k) {
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auto* row = allRows[k].get();
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if (row->hierarchicalLevel() == level - 1)
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return row;
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}
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return nullptr;
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}
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AccessibilityObject* AccessibilityARIAGridRow::parentObjectUnignored() const
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{
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return parentTable();
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}
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AccessibilityTable* AccessibilityARIAGridRow::parentTable() const
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{
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// The parent table might not be the direct ancestor of the row unfortunately. ARIA states that role="grid" should
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// only have "row" elements, but if not, we still should handle it gracefully by finding the right table.
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for (AccessibilityObject* parent = parentObject(); parent; parent = parent->parentObject()) {
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// The parent table for an ARIA grid row should be an ARIA table.
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// Unless the row is a native tr element.
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if (is<AccessibilityTable>(*parent)) {
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AccessibilityTable& tableParent = downcast<AccessibilityTable>(*parent);
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if (tableParent.isExposable() && (tableParent.isAriaTable() || node()->hasTagName(HTMLNames::trTag)))
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return &tableParent;
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}
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}
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return nullptr;
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}
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AXCoreObject* AccessibilityARIAGridRow::headerObject()
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{
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for (const auto& child : children()) {
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if (child->ariaRoleAttribute() == AccessibilityRole::RowHeader)
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return child.get();
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}
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return nullptr;
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}
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} // namespace WebCore
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