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/*
* 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 "third_party/blink/renderer/modules/accessibility/ax_list_box.h"
#include "third_party/blink/renderer/core/html/forms/html_option_element.h"
#include "third_party/blink/renderer/core/html/forms/html_select_element.h"
#include "third_party/blink/renderer/modules/accessibility/ax_list_box_option.h"
#include "third_party/blink/renderer/modules/accessibility/ax_object_cache_impl.h"
namespace blink {
AXListBox::AXListBox(LayoutObject* layout_object,
AXObjectCacheImpl& ax_object_cache)
: AXLayoutObject(layout_object, ax_object_cache), active_index_(-1) {
ActiveIndexChanged();
}
AXListBox::~AXListBox() = default;
ax::mojom::Role AXListBox::DetermineAccessibilityRole() {
if ((aria_role_ = DetermineAriaRoleAttribute()) != ax::mojom::Role::kUnknown)
return aria_role_;
return ax::mojom::Role::kListBox;
}
AXObject* AXListBox::ActiveDescendant() {
if (!IsHTMLSelectElement(GetNode()))
return nullptr;
HTMLSelectElement* select = ToHTMLSelectElement(GetNode());
int active_index = select->ActiveSelectionEndListIndex();
if (active_index >= 0 && active_index < static_cast<int>(select->length())) {
HTMLOptionElement* option = select->item(active_index_);
return AXObjectCache().Get(option);
}
return nullptr;
}
void AXListBox::ActiveIndexChanged() {
if (!IsHTMLSelectElement(GetNode()))
return;
HTMLSelectElement* select = ToHTMLSelectElement(GetNode());
int active_index = select->ActiveSelectionEndListIndex();
if (active_index == active_index_)
return;
active_index_ = active_index;
if (!select->IsFocused())
return;
AXObjectCache().PostNotification(this,
ax::mojom::Event::kActiveDescendantChanged);
}
} // namespace blink
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