210 lines
7.1 KiB
C++
210 lines
7.1 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 "AccessibilityTableColumn.h"
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#include "AXObjectCache.h"
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#include "AccessibilityTableCell.h"
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#include "HTMLElement.h"
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#include "HTMLNames.h"
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#include "RenderTable.h"
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#include "RenderTableCell.h"
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#include "RenderTableSection.h"
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namespace WebCore {
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using namespace HTMLNames;
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AccessibilityTableColumn::AccessibilityTableColumn() = default;
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AccessibilityTableColumn::~AccessibilityTableColumn() = default;
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Ref<AccessibilityTableColumn> AccessibilityTableColumn::create()
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{
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return adoptRef(*new AccessibilityTableColumn());
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}
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void AccessibilityTableColumn::setParent(AccessibilityObject* parent)
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{
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AccessibilityMockObject::setParent(parent);
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clearChildren();
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}
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LayoutRect AccessibilityTableColumn::elementRect() const
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{
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// This used to be cached during the call to addChildren(), but calling elementRect()
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// can invalidate elements, so its better to ask for this on demand.
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LayoutRect columnRect;
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AccessibilityChildrenVector childrenCopy = m_children;
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for (const auto& cell : childrenCopy)
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columnRect.unite(cell->elementRect());
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return columnRect;
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}
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AXCoreObject* AccessibilityTableColumn::columnHeader()
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{
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if (!m_parent || !is<AccessibilityTable>(*m_parent)
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|| !m_parent->isExposable())
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return nullptr;
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RenderObject* renderer = m_parent->renderer();
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if (!renderer)
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return nullptr;
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auto& parentTable = downcast<AccessibilityTable>(*m_parent);
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if (parentTable.isAriaTable()) {
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for (const auto& cell : children()) {
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if (cell->ariaRoleAttribute() == AccessibilityRole::ColumnHeader)
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return cell.get();
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}
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return nullptr;
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}
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if (!is<RenderTable>(*renderer))
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return nullptr;
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RenderTable& table = downcast<RenderTable>(*renderer);
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// try the <thead> section first. this doesn't require th tags
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if (auto* headerObject = headerObjectForSection(table.header(), false))
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return headerObject;
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RenderTableSection* bodySection = table.firstBody();
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while (bodySection && bodySection->isAnonymous())
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bodySection = table.sectionBelow(bodySection, SkipEmptySections);
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// now try for <th> tags in the first body. If the first body is
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return headerObjectForSection(bodySection, true);
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}
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AccessibilityObject* AccessibilityTableColumn::headerObjectForSection(RenderTableSection* section, bool thTagRequired)
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{
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if (!section)
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return nullptr;
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unsigned numCols = section->numColumns();
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if (m_columnIndex >= numCols)
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return nullptr;
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if (!section->numRows())
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return nullptr;
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RenderTableCell* cell = nullptr;
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// also account for cells that have a span
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for (int testCol = m_columnIndex; testCol >= 0; --testCol) {
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// Run down the rows in case initial rows are invalid (like when a <caption> is used).
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unsigned rowCount = section->numRows();
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for (unsigned testRow = 0; testRow < rowCount; testRow++) {
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RenderTableCell* testCell = section->primaryCellAt(testRow, testCol);
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// No cell at this index, keep checking more rows and columns.
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if (!testCell)
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continue;
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// If we've reached a cell that doesn't even overlap our column it can't be the header.
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if ((testCell->col() + (testCell->colSpan()-1)) < m_columnIndex)
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break;
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Node* testCellNode = testCell->element();
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// If the RenderTableCell doesn't have an element because its anonymous,
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// try to see if we can find the original cell element to check if it has a <th> tag.
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if (!testCellNode && testCell->isAnonymous()) {
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if (Element* parentElement = testCell->parent() ? testCell->parent()->element() : nullptr) {
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if (parentElement->hasTagName(trTag) && testCol < static_cast<int>(parentElement->countChildNodes()))
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testCellNode = parentElement->traverseToChildAt(testCol);
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}
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}
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if (!testCellNode)
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continue;
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// If th is required, but we found an element that doesn't have a th tag, we can stop looking.
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if (thTagRequired && !testCellNode->hasTagName(thTag))
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break;
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cell = testCell;
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break;
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}
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}
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if (!cell)
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return nullptr;
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auto* cellObject = axObjectCache()->getOrCreate(cell);
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if (!cellObject || cellObject->accessibilityIsIgnored())
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return nullptr;
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return cellObject;
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}
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bool AccessibilityTableColumn::computeAccessibilityIsIgnored() const
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{
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if (!m_parent)
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return true;
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#if PLATFORM(IOS_FAMILY) || USE(ATK)
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return true;
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#endif
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return m_parent->accessibilityIsIgnored();
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}
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void AccessibilityTableColumn::addChildren()
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{
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ASSERT(!m_haveChildren);
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m_haveChildren = true;
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if (!is<AccessibilityTable>(m_parent))
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return;
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auto& parentTable = downcast<AccessibilityTable>(*m_parent);
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if (!parentTable.isExposable())
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return;
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int numRows = parentTable.rowCount();
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for (int i = 0; i < numRows; ++i) {
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auto* cell = parentTable.cellForColumnAndRow(m_columnIndex, i);
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if (!cell)
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continue;
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// make sure the last one isn't the same as this one (rowspan cells)
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if (m_children.size() > 0 && m_children.last() == cell)
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continue;
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m_children.append(cell);
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}
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}
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} // namespace WebCore
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