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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 "third_party/blink/renderer/modules/accessibility/ax_menu_list_option.h"
#include "third_party/blink/renderer/core/aom/accessible_node.h"
#include "third_party/blink/renderer/core/html/forms/html_select_element.h"
#include "third_party/blink/renderer/modules/accessibility/ax_menu_list.h"
#include "third_party/blink/renderer/modules/accessibility/ax_menu_list_popup.h"
#include "third_party/blink/renderer/modules/accessibility/ax_object_cache_impl.h"
#include "third_party/skia/include/core/SkMatrix44.h"
namespace blink {
AXMenuListOption::AXMenuListOption(HTMLOptionElement* element,
AXObjectCacheImpl& ax_object_cache)
: AXNodeObject(element, ax_object_cache), element_(element) {}
AXMenuListOption::~AXMenuListOption() {
DCHECK(!element_);
}
void AXMenuListOption::Detach() {
element_ = nullptr;
AXNodeObject::Detach();
}
LocalFrameView* AXMenuListOption::DocumentFrameView() const {
if (IsDetached())
return nullptr;
return element_->GetDocument().View();
}
ax::mojom::Role AXMenuListOption::RoleValue() const {
const AtomicString& aria_role =
GetAOMPropertyOrARIAAttribute(AOMStringProperty::kRole);
if (aria_role.IsEmpty())
return ax::mojom::Role::kMenuListOption;
ax::mojom::Role role = AriaRoleToWebCoreRole(aria_role);
if (role != ax::mojom::Role::kUnknown)
return role;
return ax::mojom::Role::kMenuListOption;
}
Element* AXMenuListOption::ActionElement() const {
return element_;
}
AXObject* AXMenuListOption::ComputeParent() const {
Node* node = GetNode();
if (!node)
return nullptr;
auto* select = To<HTMLOptionElement>(node)->OwnerSelectElement();
if (!select)
return nullptr;
AXObject* select_ax_object = AXObjectCache().GetOrCreate(select);
if (!select_ax_object)
return nullptr;
// This happens if the <select> is not rendered. Return it and move on.
auto* menu_list = DynamicTo<AXMenuList>(select_ax_object);
if (!menu_list)
return select_ax_object;
if (menu_list->HasChildren()) {
const auto& child_objects = menu_list->Children();
if (child_objects.IsEmpty())
return nullptr;
DCHECK_EQ(child_objects.size(), 1UL);
DCHECK(IsA<AXMenuListPopup>(child_objects[0].Get()));
To<AXMenuListPopup>(child_objects[0].Get())->UpdateChildrenIfNecessary();
} else {
menu_list->UpdateChildrenIfNecessary();
}
return parent_.Get();
}
bool AXMenuListOption::IsVisible() const {
if (!parent_)
return false;
// In a single-option select with the popup collapsed, only the selected
// item is considered visible.
return !parent_->IsOffScreen() ||
((IsSelected() == kSelectedStateTrue) ? true : false);
}
bool AXMenuListOption::IsOffScreen() const {
// Invisible list options are considered to be offscreen.
return !IsVisible();
}
int AXMenuListOption::PosInSet() const {
// Value should be 1-based. 0 means not supported.
return SetSize() ? element_->index() + 1 : 0;
}
int AXMenuListOption::SetSize() const {
// Return 0 if not supported.
if (!element_)
return 0;
HTMLSelectElement* select = element_->OwnerSelectElement();
if (!select)
return 0;
return select->length();
}
AccessibilitySelectedState AXMenuListOption::IsSelected() const {
if (!GetNode() || !CanSetSelectedAttribute())
return kSelectedStateUndefined;
AXMenuListPopup* parent = static_cast<AXMenuListPopup*>(ParentObject());
if (parent && !parent->IsOffScreen()) {
return ((parent->ActiveDescendant() == this) ? kSelectedStateTrue
: kSelectedStateFalse);
}
return ((element_ && element_->Selected()) ? kSelectedStateTrue
: kSelectedStateFalse);
}
bool AXMenuListOption::OnNativeClickAction() {
if (!element_)
return false;
// Clicking on an option within a menu list should first select that item,
// then toggle whether the menu list is showing.
element_->SetSelected(true);
// Calling OnNativeClickAction on the parent select element will toggle
// it open or closed.
if (IsA<AXMenuListPopup>(ParentObject()))
return ParentObject()->OnNativeClickAction();
return AXNodeObject::OnNativeClickAction();
}
bool AXMenuListOption::OnNativeSetSelectedAction(bool b) {
if (!element_ || !CanSetSelectedAttribute())
return false;
element_->SetSelected(b);
return true;
}
bool AXMenuListOption::ComputeAccessibilityIsIgnored(
IgnoredReasons* ignored_reasons) const {
return AccessibilityIsIgnoredByDefault(ignored_reasons);
}
void AXMenuListOption::GetRelativeBounds(AXObject** out_container,
FloatRect& out_bounds_in_container,
SkMatrix44& out_container_transform,
bool* clips_children) const {
*out_container = nullptr;
out_bounds_in_container = FloatRect();
out_container_transform.setIdentity();
AXObject* parent = ParentObject();
if (!parent)
return;
DCHECK(IsA<AXMenuListPopup>(parent));
AXObject* grandparent = parent->ParentObject();
if (!grandparent)
return;
DCHECK(grandparent->IsMenuList());
grandparent->GetRelativeBounds(out_container, out_bounds_in_container,
out_container_transform, clips_children);
}
String AXMenuListOption::TextAlternative(bool recursive,
bool in_aria_labelled_by_traversal,
AXObjectSet& visited,
ax::mojom::NameFrom& name_from,
AXRelatedObjectVector* related_objects,
NameSources* name_sources) const {
// If nameSources is non-null, relatedObjects is used in filling it in, so it
// must be non-null as well.
if (name_sources)
DCHECK(related_objects);
if (!GetNode())
return String();
bool found_text_alternative = false;
String text_alternative = AriaTextAlternative(
recursive, in_aria_labelled_by_traversal, visited, name_from,
related_objects, name_sources, &found_text_alternative);
if (found_text_alternative && !name_sources)
return text_alternative;
name_from = ax::mojom::NameFrom::kContents;
text_alternative = element_->DisplayLabel();
if (name_sources) {
name_sources->push_back(NameSource(found_text_alternative));
name_sources->back().type = name_from;
name_sources->back().text = text_alternative;
found_text_alternative = true;
}
return text_alternative;
}
HTMLSelectElement* AXMenuListOption::ParentSelectNode() const {
if (!GetNode())
return nullptr;
if (auto* option = DynamicTo<HTMLOptionElement>(GetNode()))
return option->OwnerSelectElement();
return nullptr;
}
void AXMenuListOption::Trace(Visitor* visitor) {
visitor->Trace(element_);
AXNodeObject::Trace(visitor);
}
} // namespace blink
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