Code drop from //branches/cupcake/...@124589

1 files changed, 167 insertions, 0 deletions

diff --git a/WebCore/page/AccessibilityTableColumn.cpp b/WebCore/page/AccessibilityTableColumn.cpp
new file mode 100644
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--- /dev/null
+++ b/WebCore/page/AccessibilityTableColumn.cpp
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+/*
+ * 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 Computer, 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 "AccessibilityTableColumn.h"
+
+#include "AccessibilityTableCell.h"
+#include "AXObjectCache.h"
+#include "HTMLNames.h"
+#include "RenderTable.h"
+#include "RenderTableSection.h"
+#include "RenderTableCell.h"
+
+using namespace std;
+
+namespace WebCore {
+    
+using namespace HTMLNames;
+
+AccessibilityTableColumn::AccessibilityTableColumn()
+    : m_parentTable(0)
+{
+}
+
+AccessibilityTableColumn::~AccessibilityTableColumn()
+{
+}    
+
+PassRefPtr<AccessibilityTableColumn> AccessibilityTableColumn::create()
+{
+    return adoptRef(new AccessibilityTableColumn());
+}
+
+void AccessibilityTableColumn::setParentTable(AccessibilityTable* table)
+{
+    m_parentTable = table;
+    
+    clearChildren();
+    addChildren();
+}
+    
+IntRect AccessibilityTableColumn::elementRect() const
+{
+    // this will be filled in when addChildren is called
+    return m_columnRect;
+}
+
+IntSize AccessibilityTableColumn::size() const
+{
+    return elementRect().size();
+}
+  
+const AccessibilityObject::AccessibilityChildrenVector& AccessibilityTableColumn::children()
+{
+    if (!m_haveChildren)
+        addChildren();
+    return m_children;
+}
+    
+AccessibilityObject* AccessibilityTableColumn::headerObject()
+{
+    if (!m_parentTable)
+        return 0;
+    
+    RenderTable* table = static_cast<RenderTable*>(m_parentTable->renderer());
+    
+    AccessibilityObject* headerObject = 0;
+    
+    // try the <thead> section first. this doesn't require th tags
+    headerObject = headerObjectForSection(table->header(), false);
+
+    if (headerObject)
+        return headerObject;
+    
+    // now try for <th> tags in the first body
+    headerObject = headerObjectForSection(table->firstBody(), true);
+
+    return headerObject;
+}
+
+AccessibilityObject* AccessibilityTableColumn::headerObjectForSection(RenderTableSection* section, bool thTagRequired)
+{
+    if (!section)
+        return 0;
+    
+    int numCols = section->numColumns();
+    if (m_columnIndex >= numCols)
+        return 0;
+    
+    RenderTableCell* cell = 0;
+    // also account for cells that have a span
+    for (int testCol = m_columnIndex; testCol >= 0; --testCol) {
+        RenderTableCell* testCell = section->cellAt(0, testCol).cell;
+        if (!testCell)
+            continue;
+        
+        // we've reached a cell that doesn't even overlap our column 
+        // it can't be our header
+        if ((testCell->col() + (testCell->colSpan()-1)) < m_columnIndex)
+            break;
+        
+        Node* node = testCell->element();
+        if (!node)
+            continue;
+        
+        if (thTagRequired && !node->hasTagName(thTag))
+            continue;
+        
+        cell = testCell;
+    }
+    
+    if (!cell)
+        return 0;
+
+    return m_parentTable->axObjectCache()->get(cell);
+}
+    
+void AccessibilityTableColumn::addChildren()
+{
+    ASSERT(!m_haveChildren); 
+    
+    m_haveChildren = true;
+    if (!m_parentTable)
+        return;
+    
+    int numRows = m_parentTable->rowCount();
+    
+    for (int i = 0; i < numRows; i++) {
+        AccessibilityTableCell* cell = m_parentTable->cellForColumnAndRow(m_columnIndex, i);
+        if (!cell)
+            continue;
+        
+        // make sure the last one isn't the same as this one (rowspan cells)
+        if (m_children.size() > 0 && m_children.last() == cell)
+            continue;
+            
+        m_children.append(cell);
+        m_columnRect.unite(cell->elementRect());
+    }
+}
+    
+} // namespace WebCore