1 /*
2 * Copyright (C) 2008 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 * its contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include "third_party/blink/renderer/modules/accessibility/ax_image_map_link.h"
30
31 #include "third_party/blink/renderer/core/aom/accessible_node.h"
32 #include "third_party/blink/renderer/core/dom/element_traversal.h"
33 #include "third_party/blink/renderer/modules/accessibility/ax_layout_object.h"
34 #include "third_party/blink/renderer/modules/accessibility/ax_object_cache_impl.h"
35 #include "third_party/blink/renderer/platform/graphics/path.h"
36 #include "third_party/skia/include/core/SkMatrix44.h"
37
38 namespace blink {
39
AXImageMapLink(HTMLAreaElement * area,AXObjectCacheImpl & ax_object_cache)40 AXImageMapLink::AXImageMapLink(HTMLAreaElement* area,
41 AXObjectCacheImpl& ax_object_cache)
42 : AXNodeObject(area, ax_object_cache) {}
43
44 AXImageMapLink::~AXImageMapLink() = default;
45
MapElement() const46 HTMLMapElement* AXImageMapLink::MapElement() const {
47 HTMLAreaElement* area = AreaElement();
48 if (!area)
49 return nullptr;
50 return Traversal<HTMLMapElement>::FirstAncestor(*area);
51 }
52
ComputeParent() const53 AXObject* AXImageMapLink::ComputeParent() const {
54 DCHECK(!IsDetached());
55 if (parent_)
56 return parent_;
57
58 if (!MapElement())
59 return nullptr;
60
61 return AXObjectCache().GetOrCreate(MapElement()->GetLayoutObject());
62 }
63
RoleValue() const64 ax::mojom::Role AXImageMapLink::RoleValue() const {
65 const AtomicString& aria_role =
66 GetAOMPropertyOrARIAAttribute(AOMStringProperty::kRole);
67 if (!aria_role.IsEmpty())
68 return AXObject::AriaRoleToWebCoreRole(aria_role);
69
70 // https://www.w3.org/TR/html-aam-1.0/#html-element-role-mappings
71 // <area> tags without an href should be treated as static text.
72 KURL url = Url();
73 if (url.IsNull() || url.IsEmpty())
74 return ax::mojom::Role::kStaticText;
75
76 return ax::mojom::Role::kLink;
77 }
78
ComputeAccessibilityIsIgnored(IgnoredReasons * ignored_reasons) const79 bool AXImageMapLink::ComputeAccessibilityIsIgnored(
80 IgnoredReasons* ignored_reasons) const {
81 return AccessibilityIsIgnoredByDefault(ignored_reasons);
82 }
83
ActionElement() const84 Element* AXImageMapLink::ActionElement() const {
85 return AnchorElement();
86 }
87
AnchorElement() const88 Element* AXImageMapLink::AnchorElement() const {
89 return To<Element>(GetNode());
90 }
91
Url() const92 KURL AXImageMapLink::Url() const {
93 if (!AreaElement())
94 return KURL();
95
96 return AreaElement()->Href();
97 }
98
GetRelativeBounds(AXObject ** out_container,FloatRect & out_bounds_in_container,SkMatrix44 & out_container_transform,bool * clips_children) const99 void AXImageMapLink::GetRelativeBounds(AXObject** out_container,
100 FloatRect& out_bounds_in_container,
101 SkMatrix44& out_container_transform,
102 bool* clips_children) const {
103 *out_container = nullptr;
104 out_bounds_in_container = FloatRect();
105 out_container_transform.setIdentity();
106
107 HTMLAreaElement* area = AreaElement();
108 HTMLMapElement* map = MapElement();
109 if (!area || !map)
110 return;
111
112 LayoutObject* layout_object;
113 if (auto* ax_object = DynamicTo<AXLayoutObject>(parent_.Get()))
114 layout_object = ax_object->GetLayoutObject();
115 else
116 layout_object = map->GetLayoutObject();
117
118 if (!layout_object)
119 return;
120
121 out_bounds_in_container = area->GetPath(layout_object).BoundingRect();
122 *out_container = AXObjectCache().GetOrCreate(layout_object);
123 }
124
IsImageMapLink() const125 bool AXImageMapLink::IsImageMapLink() const {
126 return true;
127 }
128
Trace(Visitor * visitor) const129 void AXImageMapLink::Trace(Visitor* visitor) const {
130 AXNodeObject::Trace(visitor);
131 }
132
133 } // namespace blink
134