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/*
* Copyright (C) 2016 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 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 "AccessibilityLabel.h"
#include "AXObjectCache.h"
#include "HTMLNames.h"
namespace WebCore {
using namespace HTMLNames;
AccessibilityLabel::AccessibilityLabel(RenderObject* renderer)
: AccessibilityRenderObject(renderer)
{
}
AccessibilityLabel::~AccessibilityLabel() = default;
Ref<AccessibilityLabel> AccessibilityLabel::create(RenderObject* renderer)
{
return adoptRef(*new AccessibilityLabel(renderer));
}
bool AccessibilityLabel::computeAccessibilityIsIgnored() const
{
return accessibilityIsIgnoredByDefault();
}
String AccessibilityLabel::stringValue() const
{
if (containsOnlyStaticText())
return textUnderElement();
return AccessibilityNodeObject::stringValue();
}
static bool childrenContainOnlyStaticText(const AccessibilityObject::AccessibilityChildrenVector& children)
{
if (!children.size())
return false;
for (const auto& child : children) {
if (child->roleValue() == AccessibilityRole::StaticText)
continue;
if (child->roleValue() == AccessibilityRole::Group) {
if (!childrenContainOnlyStaticText(child->children()))
return false;
} else
return false;
}
return true;
}
bool AccessibilityLabel::containsOnlyStaticText() const
{
if (m_containsOnlyStaticTextDirty)
return childrenContainOnlyStaticText(m_children);
return m_containsOnlyStaticText;
}
static bool childrenContainUnrelatedControls(const AccessibilityObject::AccessibilityChildrenVector& children, AccessibilityObject* controlForLabel)
{
if (!children.size())
return false;
for (const auto& child : children) {
if (child->isControl()) {
if (child == controlForLabel)
continue;
return true;
}
if (childrenContainUnrelatedControls(child->children(), controlForLabel))
return true;
}
return false;
}
bool AccessibilityLabel::containsUnrelatedControls() const
{
if (containsOnlyStaticText())
return false;
return childrenContainUnrelatedControls(m_children, correspondingControlForLabelElement());
}
void AccessibilityLabel::updateChildrenIfNecessary()
{
AccessibilityRenderObject::updateChildrenIfNecessary();
if (m_containsOnlyStaticTextDirty)
m_containsOnlyStaticText = childrenContainOnlyStaticText(m_children);
m_containsOnlyStaticTextDirty = false;
}
void AccessibilityLabel::clearChildren()
{
AccessibilityRenderObject::clearChildren();
m_containsOnlyStaticText = false;
m_containsOnlyStaticTextDirty = false;
}
void AccessibilityLabel::insertChild(AXCoreObject* object, unsigned index, DescendIfIgnored descendIfIgnored)
{
AccessibilityObject::insertChild(object, index, descendIfIgnored);
m_containsOnlyStaticTextDirty = true;
}
} // namespace WebCore