| /* |
| * 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 |