1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
|
/*
* 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.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_ACCESSIBILITY_AX_LAYOUT_OBJECT_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_ACCESSIBILITY_AX_LAYOUT_OBJECT_H_
#include "base/macros.h"
#include "third_party/blink/renderer/modules/accessibility/ax_node_object.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/geometry/layout_rect.h"
namespace blink {
class AXObjectCacheImpl;
class AXSVGRoot;
class Element;
class HTMLAreaElement;
class IntPoint;
class LocalFrameView;
class Node;
class MODULES_EXPORT AXLayoutObject : public AXNodeObject {
protected:
AXLayoutObject(LayoutObject*, AXObjectCacheImpl&);
public:
static AXLayoutObject* Create(LayoutObject*, AXObjectCacheImpl&);
~AXLayoutObject() override;
// Public, overridden from AXObject.
LayoutObject* GetLayoutObject() const final { return layout_object_; }
LayoutBoxModelObject* GetLayoutBoxModelObject() const;
ScrollableArea* GetScrollableAreaIfScrollable() const final;
AccessibilityRole DetermineAccessibilityRole() override;
AccessibilityRole NativeAccessibilityRoleIgnoringAria() const override;
// If this is an anonymous block, returns the node of its containing layout
// block, otherwise returns the node of this layout object.
Node* GetNodeOrContainingBlockNode() const;
protected:
LayoutObject* layout_object_;
LayoutObject* LayoutObjectForRelativeBounds() const override {
return layout_object_;
}
//
// Overridden from AXObject.
//
void Init() override;
void Detach() override;
bool IsDetached() const override { return !layout_object_; }
bool IsAXLayoutObject() const override { return true; }
// Check object role or purpose.
bool IsEditable() const override;
bool IsRichlyEditable() const override;
bool IsLinked() const override;
bool IsLoaded() const override;
bool IsOffScreen() const override;
bool IsVisited() const override;
// Check object state.
bool IsFocused() const override;
AccessibilitySelectedState IsSelected() const override;
bool IsSelectedFromFocus() const override;
// Whether objects are ignored, i.e. not included in the tree.
AXObjectInclusion DefaultObjectInclusion(
IgnoredReasons* = nullptr) const override;
bool ComputeAccessibilityIsIgnored(IgnoredReasons* = nullptr) const override;
// Properties of static elements.
const AtomicString& AccessKey() const override;
RGBA32 ComputeBackgroundColor() const final;
RGBA32 GetColor() const final;
AtomicString FontFamily() const final;
// Font size is in pixels.
float FontSize() const final;
String ImageDataUrl(const IntSize& max_size) const final;
String GetText() const override;
AccessibilityTextDirection GetTextDirection() const final;
AXTextPosition GetTextPosition() const final;
int TextLength() const override;
TextStyle GetTextStyle() const final;
KURL Url() const override;
// Inline text boxes.
void LoadInlineTextBoxes() override;
AXObject* NextOnLine() const override;
AXObject* PreviousOnLine() const override;
// Properties of interactive elements.
String StringValue() const override;
// ARIA attributes.
void AriaDescribedbyElements(AXObjectVector&) const override;
void AriaOwnsElements(AXObjectVector&) const override;
AXHasPopup HasPopup() const override;
bool SupportsARIADragging() const override;
bool SupportsARIADropping() const override;
bool SupportsARIAFlowTo() const override;
bool SupportsARIAOwns() const override;
// ARIA live-region features.
const AtomicString& LiveRegionStatus() const override;
const AtomicString& LiveRegionRelevant() const override;
// AX name calc.
String TextAlternative(bool recursive,
bool in_aria_labelled_by_traversal,
AXObjectSet& visited,
AXNameFrom&,
AXRelatedObjectVector*,
NameSources*) const override;
// Modify or take an action on an object.
bool OnNativeSetSelectionAction(const AXSelection&) override;
bool OnNativeSetValueAction(const String&) override;
// Methods that retrieve or manipulate the current selection.
AXSelection Selection() const override;
AXSelection SelectionUnderObject() const override;
// Hit testing.
AXObject* AccessibilityHitTest(const IntPoint&) const override;
AXObject* ElementAccessibilityHitTest(const IntPoint&) const override;
// High-level accessibility tree access. Other modules should only use these
// functions.
AXObject* ComputeParent() const override;
AXObject* ComputeParentIfExists() const override;
// Low-level accessibility tree exploration, only for use within the
// accessibility module.
AXObject* RawFirstChild() const override;
AXObject* RawNextSibling() const override;
void AddChildren() override;
bool CanHaveChildren() const override;
// Properties of the object's owning document or page.
double EstimatedLoadingProgress() const override;
// DOM and layout tree access.
Node* GetNode() const override;
Document* GetDocument() const override;
LocalFrameView* DocumentFrameView() const override;
Element* AnchorElement() const override;
AtomicString Language() const override;
// Notifications that this object may have changed.
void HandleActiveDescendantChanged() override;
void HandleAriaExpandedChanged() override;
void TextChanged() override;
// Text metrics. Most of these should be deprecated, needs major cleanup.
int Index(const VisiblePosition&) const override;
VisiblePosition VisiblePositionForIndex(int) const override;
void LineBreaks(Vector<int>&) const final;
// For a table.
bool IsDataTable() const override;
unsigned ColumnCount() const override;
unsigned RowCount() const override;
void ColumnHeaders(AXObjectVector&) const override;
void RowHeaders(AXObjectVector&) const override;
AXObject* CellForColumnAndRow(unsigned column, unsigned row) const override;
// For a table cell.
unsigned ColumnIndex() const override;
unsigned RowIndex() const override; // Also for a table row.
unsigned ColumnSpan() const override;
unsigned RowSpan() const override;
SortDirection GetSortDirection() const override;
// For a table row or column.
AXObject* HeaderObject() const override;
private:
bool IsTabItemSelected() const;
bool IsValidSelectionBound(const AXObject*) const;
AXObject* AccessibilityImageMapHitTest(HTMLAreaElement*,
const IntPoint&) const;
LayoutObject* LayoutParentObject() const;
bool IsSVGImage() const;
void DetachRemoteSVGRoot();
AXSVGRoot* RemoteSVGRootElement() const;
AXObject* RemoteSVGElementHitTest(const IntPoint&) const;
void OffsetBoundingBoxForRemoteSVGElement(LayoutRect&) const;
void AddHiddenChildren();
void AddImageMapChildren();
void AddCanvasChildren();
void AddPopupChildren();
void AddRemoteSVGChildren();
void AddTableChildren();
void AddInlineTextBoxChildren(bool force);
AccessibilityRole DetermineTableCellRole() const;
AccessibilityRole DetermineTableRowRole() const;
bool FindAllTableCellsWithRole(AccessibilityRole, AXObjectVector&) const;
LayoutRect ComputeElementRect() const;
AXSelection TextControlSelection() const;
int IndexForVisiblePosition(const VisiblePosition&) const;
AXLayoutObject* GetUnignoredObjectFromNode(Node&) const;
bool CanIgnoreTextAsEmpty() const;
bool CanIgnoreSpaceNextTo(LayoutObject*, bool is_after) const;
bool HasAriaCellRole(Element*) const;
DISALLOW_COPY_AND_ASSIGN(AXLayoutObject);
};
DEFINE_AX_OBJECT_TYPE_CASTS(AXLayoutObject, IsAXLayoutObject());
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_ACCESSIBILITY_AX_LAYOUT_OBJECT_H_
|
