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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "ui/views/accessibility/native_view_accessibility_base.h" | 5 #include "ui/views/accessibility/native_view_accessibility_base.h" |
6 | 6 |
7 #include "base/memory/ptr_util.h" | 7 #include "base/memory/ptr_util.h" |
8 #include "base/strings/utf_string_conversions.h" | 8 #include "base/strings/utf_string_conversions.h" |
9 #include "ui/events/event_utils.h" | 9 #include "ui/events/event_utils.h" |
10 #include "ui/gfx/native_widget_types.h" | 10 #include "ui/gfx/native_widget_types.h" |
11 #include "ui/views/controls/native/native_view_host.h" | 11 #include "ui/views/controls/native/native_view_host.h" |
12 #include "ui/views/view.h" | 12 #include "ui/views/view.h" |
13 #include "ui/views/widget/widget.h" | 13 #include "ui/views/widget/widget.h" |
14 | 14 |
15 namespace views { | 15 namespace views { |
16 | 16 |
| 17 namespace { |
| 18 |
| 19 bool IsAccessibilityFocusableWhenEnabled(View* view) { |
| 20 return view->focus_behavior() != View::FocusBehavior::NEVER && |
| 21 view->IsDrawn(); |
| 22 } |
| 23 |
| 24 // Used to determine if a View should be ignored by accessibility clients by |
| 25 // being a non-keyboard-focusable child of a keyboard-focusable ancestor. E.g., |
| 26 // LabelButtons contain Labels, but a11y should just show that there's a button. |
| 27 bool IsViewUnfocusableChildOfFocusableAncestor(View* view) { |
| 28 if (IsAccessibilityFocusableWhenEnabled(view)) |
| 29 return false; |
| 30 |
| 31 while (view->parent()) { |
| 32 view = view->parent(); |
| 33 if (IsAccessibilityFocusableWhenEnabled(view)) |
| 34 return true; |
| 35 } |
| 36 return false; |
| 37 } |
| 38 |
| 39 } // namespace |
| 40 |
17 NativeViewAccessibilityBase::NativeViewAccessibilityBase(View* view) | 41 NativeViewAccessibilityBase::NativeViewAccessibilityBase(View* view) |
18 : view_(view), | 42 : view_(view), |
19 parent_widget_(nullptr), | 43 parent_widget_(nullptr), |
20 ax_node_(ui::AXPlatformNode::Create(this)) { | 44 ax_node_(ui::AXPlatformNode::Create(this)) { |
21 DCHECK(ax_node_); | 45 DCHECK(ax_node_); |
22 } | 46 } |
23 | 47 |
24 NativeViewAccessibilityBase::~NativeViewAccessibilityBase() { | 48 NativeViewAccessibilityBase::~NativeViewAccessibilityBase() { |
25 ax_node_->Destroy(); | 49 ax_node_->Destroy(); |
26 if (parent_widget_) | 50 if (parent_widget_) |
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58 | 82 |
59 if (view_->IsAccessibilityFocusable()) | 83 if (view_->IsAccessibilityFocusable()) |
60 data_.AddState(ui::AX_STATE_FOCUSABLE); | 84 data_.AddState(ui::AX_STATE_FOCUSABLE); |
61 | 85 |
62 if (!view_->enabled()) | 86 if (!view_->enabled()) |
63 data_.AddState(ui::AX_STATE_DISABLED); | 87 data_.AddState(ui::AX_STATE_DISABLED); |
64 | 88 |
65 if (!view_->IsDrawn()) | 89 if (!view_->IsDrawn()) |
66 data_.AddState(ui::AX_STATE_INVISIBLE); | 90 data_.AddState(ui::AX_STATE_INVISIBLE); |
67 | 91 |
| 92 // Make sure this element is excluded from the a11y tree if there's a |
| 93 // focusable parent. All keyboard focusable elements should be leaf nodes. |
| 94 // Exceptions to this rule will themselves be accessibility focusable. |
| 95 if (IsViewUnfocusableChildOfFocusableAncestor(view_)) |
| 96 data_.role = ui::AX_ROLE_IGNORED; |
68 return data_; | 97 return data_; |
69 } | 98 } |
70 | 99 |
71 int NativeViewAccessibilityBase::GetChildCount() { | 100 int NativeViewAccessibilityBase::GetChildCount() { |
72 int child_count = view_->child_count(); | 101 int child_count = view_->child_count(); |
73 | 102 |
74 std::vector<Widget*> child_widgets; | 103 std::vector<Widget*> child_widgets; |
75 PopulateChildWidgetVector(&child_widgets); | 104 PopulateChildWidgetVector(&child_widgets); |
76 child_count += child_widgets.size(); | 105 child_count += child_widgets.size(); |
77 | 106 |
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219 child_widget_platform_node->GetDelegate()); | 248 child_widget_platform_node->GetDelegate()); |
220 if (child_widget_view_accessibility->parent_widget() != widget) | 249 if (child_widget_view_accessibility->parent_widget() != widget) |
221 child_widget_view_accessibility->SetParentWidget(widget); | 250 child_widget_view_accessibility->SetParentWidget(widget); |
222 } | 251 } |
223 | 252 |
224 result_child_widgets->push_back(child_widget); | 253 result_child_widgets->push_back(child_widget); |
225 } | 254 } |
226 } | 255 } |
227 | 256 |
228 } // namespace views | 257 } // namespace views |
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