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