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/*
* Copyright (C) 2010 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 INC. OR
* 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 "AccessibilityMenuList.h"
#include "AXObjectCache.h"
#include "AccessibilityMenuListPopup.h"
#include "RenderMenuList.h"
#include <wtf/Scope.h>
namespace WebCore {
AccessibilityMenuList::AccessibilityMenuList(AXID axID, RenderMenuList& renderer, AXObjectCache& cache)
: AccessibilityRenderObject(axID, renderer)
, m_popup(downcast<AccessibilityMenuListPopup>(*cache.create(AccessibilityRole::MenuListPopup)))
{
m_popup->setParent(this);
addChild(m_popup.get());
m_childrenInitialized = true;
}
Ref<AccessibilityMenuList> AccessibilityMenuList::create(AXID axID, RenderMenuList& renderer, AXObjectCache& cache)
{
return adoptRef(*new AccessibilityMenuList(axID, renderer, cache));
}
bool AccessibilityMenuList::press()
{
if (!m_renderer)
return false;
#if !PLATFORM(IOS_FAMILY)
RefPtr element = this->element();
auto notification = AXNotification::PressDidFail;
if (CheckedPtr menuList = dynamicDowncast<RenderMenuList>(renderer()); menuList && element && !element->isDisabledFormControl()) {
if (menuList->popupIsVisible())
menuList->hidePopup();
else
menuList->showPopup();
notification = AXNotification::PressDidSucceed;
}
if (CheckedPtr cache = axObjectCache())
cache->postNotification(element.get(), notification);
return true;
#endif
return false;
}
void AccessibilityMenuList::updateChildrenIfNecessary()
{
// Typically for AccessibilityNodeObject subclasses, updateChildrenIfNecessary() is what
// calls addChildren(), which in turn passes m_subtreeDirty down the tree as objects are inserted.
// However, we purposely never allow our children to be cleared or become unitialized, which
// by the definition of the AccessibilityNodeObject::updateChildrenIfNecessary() means addChildren()
// will never be called. (We add our only child, m_popup, once in the constructor).
//
// Despite this, we still want to pass down the m_subtreeDirty flag if we have it set, so do that here.
if (m_subtreeDirty)
m_popup->setNeedsToUpdateSubtree();
m_subtreeDirty = false;
}
void AccessibilityMenuList::addChildren()
{
// This class sets its children once in the constructor, and should never
// have dirty or uninitialized children afterwards.
ASSERT(m_childrenInitialized);
ASSERT(!m_childrenDirty);
}
bool AccessibilityMenuList::isCollapsed() const
{
// Collapsed is the "default" state, so if the renderer doesn't exist
// this makes slightly more sense than returning false.
if (!m_renderer)
return true;
#if !PLATFORM(IOS_FAMILY)
CheckedPtr menuList = dynamicDowncast<RenderMenuList>(renderer());
return !(menuList && menuList->popupIsVisible());
#else
return true;
#endif
}
bool AccessibilityMenuList::canSetFocusAttribute() const
{
RefPtr element = this->element();
return element && !element->isDisabledFormControl();
}
void AccessibilityMenuList::didUpdateActiveOption(int optionIndex)
{
RefPtr document = m_renderer ? &m_renderer->document() : nullptr;
if (!document)
return;
const auto& childObjects = unignoredChildren();
if (!childObjects.isEmpty()) {
ASSERT(childObjects.size() == 1);
ASSERT(is<AccessibilityMenuListPopup>(childObjects[0].get()));
// We might be calling this method in situations where the renderers for list items
// associated to the menu list have not been created (e.g. they might be rendered
// in the UI process, as it's the case in the GTK+ port, which uses GtkMenuItem).
// So, we need to make sure that the accessibility popup object has some children
// before asking it to update its active option, or it will read invalid memory.
// You can reproduce the issue in the GTK+ port by removing this check and running
// accessibility/insert-selected-option-into-select-causes-crash.html (will crash).
int popupChildrenSize = static_cast<int>(childObjects[0]->unignoredChildren().size());
RefPtr accessibilityMenuListPopup = dynamicDowncast<AccessibilityMenuListPopup>(childObjects[0].get());
if (accessibilityMenuListPopup && optionIndex >= 0 && optionIndex < popupChildrenSize)
accessibilityMenuListPopup->didUpdateActiveOption(optionIndex);
}
if (CheckedPtr cache = document->axObjectCache())
cache->deferMenuListValueChange(element());
}
} // namespace WebCore
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