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/*
* Copyright (C) 2012 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 "AccessibilitySVGRoot.h"
#include "AXObjectCache.h"
#include "ElementInlines.h"
#include "RenderObject.h"
#include "SVGDescElement.h"
#include "SVGElementTypeHelpers.h"
#include "SVGTitleElement.h"
#include "TypedElementDescendantIteratorInlines.h"
namespace WebCore {
AccessibilitySVGRoot::AccessibilitySVGRoot(AXID axID, RenderObject& renderer, AXObjectCache* cache)
: AccessibilitySVGObject(axID, renderer, cache)
{
}
AccessibilitySVGRoot::~AccessibilitySVGRoot() = default;
Ref<AccessibilitySVGRoot> AccessibilitySVGRoot::create(AXID axID, RenderObject& renderer, AXObjectCache* cache)
{
return adoptRef(*new AccessibilitySVGRoot(axID, renderer, cache));
}
void AccessibilitySVGRoot::setParent(AccessibilityRenderObject* parent)
{
m_parent = parent;
}
AccessibilityObject* AccessibilitySVGRoot::parentObject() const
{
// If a parent was set because this is a remote SVG resource, use that
// but otherwise, we should rely on the standard render tree for the parent.
if (m_parent)
return m_parent.get();
return AccessibilitySVGObject::parentObject();
}
AccessibilityRole AccessibilitySVGRoot::determineAccessibilityRole()
{
if ((m_ariaRole = determineAriaRoleAttribute()) != AccessibilityRole::Unknown)
return m_ariaRole;
return AccessibilityRole::Generic;
}
bool AccessibilitySVGRoot::hasAccessibleContent() const
{
auto* rootElement = this->element();
if (!rootElement)
return false;
auto isAccessibleSVGElement = [] (const SVGElement& element) -> bool {
// The presence of an SVGTitle or SVGDesc element is enough to deem the SVG hierarchy as accessible.
if (is<SVGTitleElement>(element)
|| is<SVGDescElement>(element))
return true;
// Text content is accessible.
if (element.isTextContent())
return true;
// If the role or aria-label attributes are specified, this is accessible.
if (!element.attributeWithoutSynchronization(HTMLNames::roleAttr).isEmpty()
|| !element.attributeWithoutSynchronization(HTMLNames::aria_labelAttr).isEmpty())
return true;
return false;
};
auto* svgRootElement = dynamicDowncast<SVGElement>(*rootElement);
if (svgRootElement && isAccessibleSVGElement(*svgRootElement))
return true;
// This SVG hierarchy is accessible if any of its descendants is accessible.
for (const auto& descendant : descendantsOfType<SVGElement>(*rootElement)) {
if (isAccessibleSVGElement(descendant))
return true;
}
return false;
}
} // namespace WebCore
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