189 lines
6.6 KiB
C++
189 lines
6.6 KiB
C++
/*
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* Copyright (C) 2008 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 "AccessibilityTableRow.h"
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#include "AXObjectCache.h"
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#include "AccessibilityTable.h"
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#include "AccessibilityTableCell.h"
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#include "HTMLNames.h"
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#include "HTMLTableRowElement.h"
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#include "RenderObject.h"
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#include "RenderTableCell.h"
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#include "RenderTableRow.h"
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namespace WebCore {
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using namespace HTMLNames;
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AccessibilityTableRow::AccessibilityTableRow(RenderObject* renderer)
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: AccessibilityRenderObject(renderer)
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{
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}
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AccessibilityTableRow::~AccessibilityTableRow() = default;
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Ref<AccessibilityTableRow> AccessibilityTableRow::create(RenderObject* renderer)
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{
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return adoptRef(*new AccessibilityTableRow(renderer));
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}
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AccessibilityRole AccessibilityTableRow::determineAccessibilityRole()
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{
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if (!isTableRow())
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return AccessibilityRenderObject::determineAccessibilityRole();
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if ((m_ariaRole = determineAriaRoleAttribute()) != AccessibilityRole::Unknown)
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return m_ariaRole;
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return AccessibilityRole::Row;
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}
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bool AccessibilityTableRow::isTableRow() const
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{
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AccessibilityObject* table = parentTable();
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return is<AccessibilityTable>(table) && downcast<AccessibilityTable>(*table).isExposable();
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}
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AccessibilityObject* AccessibilityTableRow::observableObject() const
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{
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// This allows the table to be the one who sends notifications about tables.
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return parentTable();
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}
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bool AccessibilityTableRow::computeAccessibilityIsIgnored() const
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{
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AccessibilityObjectInclusion decision = defaultObjectInclusion();
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if (decision == AccessibilityObjectInclusion::IncludeObject)
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return false;
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if (decision == AccessibilityObjectInclusion::IgnoreObject)
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return true;
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if (!isTableRow())
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return AccessibilityRenderObject::computeAccessibilityIsIgnored();
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return false;
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}
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AccessibilityTable* AccessibilityTableRow::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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// If this is a non-anonymous table object, but not an accessibility table, we should stop because we don't want to
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// choose another ancestor table as this row's table.
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if (is<AccessibilityTable>(*parent)) {
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auto& parentTable = downcast<AccessibilityTable>(*parent);
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if (parentTable.isExposable())
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return &parentTable;
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if (parentTable.node())
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break;
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}
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}
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return nullptr;
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}
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AXCoreObject* AccessibilityTableRow::headerObject()
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{
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if (!m_renderer || !m_renderer->isTableRow())
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return nullptr;
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const auto& rowChildren = children();
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if (!rowChildren.size())
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return nullptr;
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// check the first element in the row to see if it is a TH element
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AXCoreObject* cell = rowChildren[0].get();
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if (!is<AccessibilityTableCell>(*cell))
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return nullptr;
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RenderObject* cellRenderer = downcast<AccessibilityTableCell>(*cell).renderer();
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if (!cellRenderer)
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return nullptr;
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Node* cellNode = cellRenderer->node();
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if (!cellNode || !cellNode->hasTagName(thTag))
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return nullptr;
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// Verify that the row header is not part of an entire row of headers.
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// In that case, it is unlikely this is a row header.
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bool allHeadersInRow = true;
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for (const auto& cell : rowChildren) {
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if (cell->node() && !cell->node()->hasTagName(thTag)) {
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allHeadersInRow = false;
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break;
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}
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}
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if (allHeadersInRow)
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return nullptr;
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return cell;
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}
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void AccessibilityTableRow::addChildren()
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{
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// If the element specifies its cells through aria-owns, return that first.
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AccessibilityChildrenVector ariaOwns;
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ariaOwnsElements(ariaOwns);
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if (ariaOwns.size())
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m_children = WTFMove(ariaOwns);
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else
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AccessibilityRenderObject::addChildren();
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// "ARIA 1.1, If the set of columns which is present in the DOM is contiguous, and if there are no cells which span more than one row or
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// column in that set, then authors may place aria-colindex on each row, setting the value to the index of the first column of the set."
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// Update child cells' axColIndex if there's an aria-colindex value set for the row. So the cell doesn't have to go through the siblings
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// to calculate the index.
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int colIndex = axColumnIndex();
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if (colIndex == -1)
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return;
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unsigned index = 0;
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for (const auto& cell : children()) {
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if (is<AccessibilityTableCell>(*cell))
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downcast<AccessibilityTableCell>(*cell).setAXColIndexFromRow(colIndex + index);
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index++;
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}
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}
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int AccessibilityTableRow::axColumnIndex() const
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{
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int value = getIntegralAttribute(aria_colindexAttr);
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return value >= 1 ? value : -1;
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}
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int AccessibilityTableRow::axRowIndex() const
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{
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int value = getIntegralAttribute(aria_rowindexAttr);
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return value >= 1 ? value : -1;
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}
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} // namespace WebCore
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