accessibilitytableheadercontainer.cpp

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

/*
 * 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 "AccessibilityTableHeaderContainer.h"

#include "AccessibilityTable.h"
#include "AXObjectCache.h"

using namespace std;

namespace WebCore {

AccessibilityTableHeaderContainer::AccessibilityTableHeaderContainer()
    : m_parentTable(0)
{
}

AccessibilityTableHeaderContainer::~AccessibilityTableHeaderContainer()
{
}

PassRefPtr<AccessibilityTableHeaderContainer> AccessibilityTableHeaderContainer::create()
{
    return adoptRef(new AccessibilityTableHeaderContainer());
}
    
const AccessibilityObject::AccessibilityChildrenVector& AccessibilityTableHeaderContainer::children()
{
    if (!m_haveChildren)
        addChildren();
    return m_children;
}
   
IntRect AccessibilityTableHeaderContainer::elementRect() const
{
    // this will be filled in when addChildren is called
    return m_headerRect;
}
    
IntSize AccessibilityTableHeaderContainer::size() const
{
    return elementRect().size();
}
    
void AccessibilityTableHeaderContainer::addChildren()
{
    ASSERT(!m_haveChildren); 
    
    m_haveChildren = true;
    if (!m_parentTable || !m_parentTable->isDataTable())
        return;
    
    static_cast<AccessibilityTable*>(m_parentTable)->columnHeaders(m_children);
    
    unsigned length = m_children.size();
    for (unsigned k = 0; k < length; ++k) {
        m_headerRect.unite(m_children[k]->elementRect());
    }
}

} // namespace WebCore