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
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
content / browser / accessibility / accessibility_mode_browsertest.cc [blame]
// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "build/build_config.h"
#include "content/browser/renderer_host/render_view_host_impl.h"
#include "content/browser/renderer_host/render_widget_host_impl.h"
#include "content/browser/renderer_host/render_widget_host_view_base.h"
#include "content/browser/web_contents/web_contents_impl.h"
#include "content/public/browser/browser_accessibility_state.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/render_widget_host.h"
#include "content/public/browser/render_widget_host_view.h"
#include "content/public/browser/web_contents.h"
#include "content/public/common/url_constants.h"
#include "content/public/test/accessibility_notification_waiter.h"
#include "content/public/test/browser_test.h"
#include "content/public/test/browser_test_utils.h"
#include "content/public/test/content_browser_test.h"
#include "content/public/test/content_browser_test_utils.h"
#include "content/public/test/scoped_accessibility_mode_override.h"
#include "content/shell/browser/shell.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/accessibility/ax_mode.h"
#include "ui/accessibility/platform/browser_accessibility.h"
namespace content {
const char kMinimalPageDataURL[] =
"data:text/html,<html><head></head><body>Hello, world</body></html>";
class AccessibilityModeTest : public ContentBrowserTest {
protected:
WebContentsImpl* web_contents() {
return static_cast<WebContentsImpl*>(shell()->web_contents());
}
protected:
const ui::BrowserAccessibility* FindNode(ax::mojom::Role role,
const std::string& name) {
const ui::BrowserAccessibility* root =
GetManager()->GetBrowserAccessibilityRoot();
CHECK(root);
return FindNodeInSubtree(*root, role, name);
}
ui::BrowserAccessibilityManager* GetManager() {
WebContentsImpl* web_contents =
static_cast<WebContentsImpl*>(shell()->web_contents());
return web_contents->GetRootBrowserAccessibilityManager();
}
private:
const ui::BrowserAccessibility* FindNodeInSubtree(
const ui::BrowserAccessibility& node,
ax::mojom::Role role,
const std::string& name) {
if (node.GetRole() == role &&
node.GetStringAttribute(ax::mojom::StringAttribute::kName) == name) {
return &node;
}
for (unsigned int i = 0; i < node.PlatformChildCount(); ++i) {
const ui::BrowserAccessibility* result =
FindNodeInSubtree(*node.PlatformGetChild(i), role, name);
if (result) {
return result;
}
}
return nullptr;
}
};
IN_PROC_BROWSER_TEST_F(AccessibilityModeTest, AccessibilityModeOff) {
EXPECT_TRUE(NavigateToURL(shell(), GURL(kMinimalPageDataURL)));
auto accessibility_mode = web_contents()->GetAccessibilityMode();
bool hasNativeAPIs = accessibility_mode.has_mode(ui::AXMode::kNativeAPIs);
// Strip off kNativeAPIs, which may be set in some situations.
accessibility_mode.set_mode(ui::AXMode::kNativeAPIs, false);
EXPECT_TRUE(accessibility_mode.is_mode_off());
if (!hasNativeAPIs) {
EXPECT_EQ(nullptr, GetManager());
}
}
IN_PROC_BROWSER_TEST_F(AccessibilityModeTest, AccessibilityModeComplete) {
EXPECT_TRUE(NavigateToURL(shell(), GURL(kMinimalPageDataURL)));
auto accessibility_mode = web_contents()->GetAccessibilityMode();
// Strip off kNativeAPIs, which may be set in some situations.
accessibility_mode.set_mode(ui::AXMode::kNativeAPIs, false);
ASSERT_TRUE(accessibility_mode.is_mode_off());
AccessibilityNotificationWaiter waiter(shell()->web_contents());
ScopedAccessibilityModeOverride scoped_accessibility_mode(
web_contents(), ui::kAXModeComplete);
EXPECT_EQ(web_contents()->GetAccessibilityMode(), ui::kAXModeComplete);
ASSERT_TRUE(waiter.WaitForNotification());
EXPECT_NE(nullptr, GetManager());
}
// Tests that adding kAXModeComplete via ui::AXPlatformNode gives the flags
// to an active WebContents.
IN_PROC_BROWSER_TEST_F(AccessibilityModeTest,
AccessibilityModeCompleteViaNode) {
EXPECT_TRUE(NavigateToURL(shell(), GURL(kMinimalPageDataURL)));
auto accessibility_mode = web_contents()->GetAccessibilityMode();
// Strip off kNativeAPIs, which may be set in some situations.
accessibility_mode.set_mode(ui::AXMode::kNativeAPIs, false);
ASSERT_TRUE(accessibility_mode.is_mode_off());
AccessibilityNotificationWaiter waiter(shell()->web_contents());
ui::AXPlatformNode::NotifyAddAXModeFlags(ui::kAXModeComplete);
ASSERT_TRUE(waiter.WaitForNotification());
EXPECT_EQ(web_contents()->GetAccessibilityMode(), ui::kAXModeComplete);
EXPECT_NE(nullptr, GetManager());
}
// Tests that adding kAXModeComplete via BrowserAccessibilityState gives the
// flags to an active WebContents.
IN_PROC_BROWSER_TEST_F(AccessibilityModeTest,
AccessibilityModeCompleteViaContent) {
EXPECT_TRUE(NavigateToURL(shell(), GURL(kMinimalPageDataURL)));
auto accessibility_mode = web_contents()->GetAccessibilityMode();
// Strip off kNativeAPIs, which may be set in some situations.
accessibility_mode.set_mode(ui::AXMode::kNativeAPIs, false);
ASSERT_TRUE(accessibility_mode.is_mode_off());
AccessibilityNotificationWaiter waiter(shell()->web_contents());
BrowserAccessibilityState::GetInstance()->AddAccessibilityModeFlags(
ui::kAXModeComplete);
ASSERT_TRUE(waiter.WaitForNotification());
EXPECT_EQ(web_contents()->GetAccessibilityMode(), ui::kAXModeComplete);
EXPECT_NE(nullptr, GetManager());
}
IN_PROC_BROWSER_TEST_F(AccessibilityModeTest,
AccessibilityModeWebContentsOnly) {
EXPECT_TRUE(NavigateToURL(shell(), GURL(kMinimalPageDataURL)));
auto accessibility_mode = web_contents()->GetAccessibilityMode();
// Strip off kNativeAPIs, which may be set in some situations.
accessibility_mode.set_mode(ui::AXMode::kNativeAPIs, false);
ASSERT_TRUE(accessibility_mode.is_mode_off());
AccessibilityNotificationWaiter waiter(shell()->web_contents());
ScopedAccessibilityModeOverride scoped_accessibility_mode(
web_contents(), ui::kAXModeWebContentsOnly);
accessibility_mode = web_contents()->GetAccessibilityMode();
bool hasNativeAPIs = accessibility_mode.has_mode(ui::AXMode::kNativeAPIs);
// Strip off kNativeAPIs, which may be set in some situations.
accessibility_mode.set_mode(ui::AXMode::kNativeAPIs, false);
EXPECT_EQ(accessibility_mode, ui::kAXModeWebContentsOnly);
ASSERT_TRUE(waiter.WaitForNotification());
// No BrowserAccessibilityManager if kNativeAPIs isn't set.
if (!hasNativeAPIs) {
EXPECT_EQ(nullptr, GetManager());
}
}
IN_PROC_BROWSER_TEST_F(AccessibilityModeTest, AddingModes) {
EXPECT_TRUE(NavigateToURL(shell(), GURL(kMinimalPageDataURL)));
AccessibilityNotificationWaiter waiter(shell()->web_contents());
ScopedAccessibilityModeOverride scoped_accessibility_mode(
web_contents(), ui::kAXModeWebContentsOnly);
auto accessibility_mode = web_contents()->GetAccessibilityMode();
// Strip off kNativeAPIs, which may be set in some situations.
accessibility_mode.set_mode(ui::AXMode::kNativeAPIs, false);
EXPECT_TRUE(accessibility_mode == ui::kAXModeWebContentsOnly);
ASSERT_TRUE(waiter.WaitForNotification());
EXPECT_EQ(nullptr, GetManager());
AccessibilityNotificationWaiter waiter2(shell()->web_contents());
ScopedAccessibilityModeOverride scoped_accessibility_mode2(
web_contents(), ui::kAXModeComplete);
EXPECT_EQ(web_contents()->GetAccessibilityMode(), ui::kAXModeComplete);
ASSERT_TRUE(waiter2.WaitForNotification());
EXPECT_NE(nullptr, GetManager());
}
IN_PROC_BROWSER_TEST_F(AccessibilityModeTest,
FullAccessibilityHasInlineTextBoxes) {
// TODO(dmazzoni): On Android we use an ifdef to disable inline text boxes,
// we should do it with accessibility flags instead. http://crbug.com/672205
#if !BUILDFLAG(IS_ANDROID)
EXPECT_TRUE(NavigateToURL(shell(), GURL(url::kAboutBlankURL)));
AccessibilityNotificationWaiter waiter(shell()->web_contents(),
ui::kAXModeComplete,
ax::mojom::Event::kLoadComplete);
GURL url("data:text/html,<p>Para</p>");
EXPECT_TRUE(NavigateToURL(shell(), url));
ASSERT_TRUE(waiter.WaitForNotification());
const ui::BrowserAccessibility* text =
FindNode(ax::mojom::Role::kStaticText, "Para");
ASSERT_NE(nullptr, text);
ASSERT_EQ(1U, text->InternalChildCount());
ui::BrowserAccessibility* inline_text = text->InternalGetChild(0);
ASSERT_NE(nullptr, inline_text);
EXPECT_EQ(ax::mojom::Role::kInlineTextBox, inline_text->GetRole());
#endif // !BUILDFLAG(IS_ANDROID)
}
IN_PROC_BROWSER_TEST_F(AccessibilityModeTest,
MinimalAccessibilityModeHasNoInlineTextBoxes) {
// TODO(dmazzoni): On Android we use an ifdef to disable inline text boxes,
// we should do it with accessibility flags instead. http://crbug.com/672205
#if !BUILDFLAG(IS_ANDROID)
EXPECT_TRUE(NavigateToURL(shell(), GURL(url::kAboutBlankURL)));
AccessibilityNotificationWaiter waiter(
shell()->web_contents(),
ui::AXMode::kNativeAPIs | ui::AXMode::kWebContents,
ax::mojom::Event::kLoadComplete);
GURL url("data:text/html,<p>Para</p>");
EXPECT_TRUE(NavigateToURL(shell(), url));
ASSERT_TRUE(waiter.WaitForNotification());
const ui::BrowserAccessibility* text =
FindNode(ax::mojom::Role::kStaticText, "Para");
ASSERT_NE(nullptr, text);
EXPECT_EQ(0U, text->InternalChildCount());
#endif // !BUILDFLAG(IS_ANDROID)
}
IN_PROC_BROWSER_TEST_F(AccessibilityModeTest, AddScreenReaderModeFlag) {
EXPECT_TRUE(NavigateToURL(shell(), GURL(url::kAboutBlankURL)));
AccessibilityNotificationWaiter waiter(
shell()->web_contents(),
ui::AXMode::kNativeAPIs | ui::AXMode::kWebContents,
ax::mojom::Event::kLoadComplete);
GURL url("data:text/html,<input aria-label=Foo placeholder=Bar>");
EXPECT_TRUE(NavigateToURL(shell(), url));
ASSERT_TRUE(waiter.WaitForNotification());
const ui::BrowserAccessibility* textbox =
FindNode(ax::mojom::Role::kTextField, "Foo");
ASSERT_NE(nullptr, textbox);
EXPECT_FALSE(
textbox->HasStringAttribute(ax::mojom::StringAttribute::kPlaceholder));
int original_id = textbox->GetId();
AccessibilityNotificationWaiter waiter2(shell()->web_contents(), ui::AXMode(),
ax::mojom::Event::kLoadComplete);
ScopedAccessibilityModeOverride ax_mode_override(ui::AXMode::kScreenReader);
ASSERT_TRUE(waiter2.WaitForNotification());
const ui::BrowserAccessibility* textbox2 =
FindNode(ax::mojom::Role::kTextField, "Foo");
ASSERT_NE(nullptr, textbox2);
EXPECT_TRUE(
textbox2->HasStringAttribute(ax::mojom::StringAttribute::kPlaceholder));
EXPECT_EQ(original_id, textbox2->GetId());
}
IN_PROC_BROWSER_TEST_F(AccessibilityModeTest,
ReEnablingAccessibilityDoesNotTimeout) {
EXPECT_TRUE(NavigateToURL(shell(), GURL(kMinimalPageDataURL)));
auto accessibility_mode = web_contents()->GetAccessibilityMode();
// Strip off kNativeAPIs, which may be set in some situations.
accessibility_mode.set_mode(ui::AXMode::kNativeAPIs, false);
ASSERT_TRUE(accessibility_mode.is_mode_off());
AccessibilityNotificationWaiter waiter(shell()->web_contents());
ScopedAccessibilityModeOverride scoped_accessibility_mode(
web_contents(), ui::kAXModeWebContentsOnly);
accessibility_mode = web_contents()->GetAccessibilityMode();
bool hasNativeAPIs = accessibility_mode.has_mode(ui::AXMode::kNativeAPIs);
// Strip off kNativeAPIs, which may be set in some situations.
accessibility_mode.set_mode(ui::AXMode::kNativeAPIs, false);
EXPECT_TRUE(accessibility_mode == ui::kAXModeWebContentsOnly);
ASSERT_TRUE(waiter.WaitForNotification());
EXPECT_EQ(nullptr, GetManager());
AccessibilityNotificationWaiter waiter2(shell()->web_contents());
ScopedAccessibilityModeOverride scoped_accessibility_mode2(
web_contents(), ui::kAXModeComplete);
EXPECT_TRUE(web_contents()->GetAccessibilityMode() == ui::kAXModeComplete);
ASSERT_TRUE(waiter2.WaitForNotification());
if (!hasNativeAPIs) {
EXPECT_NE(nullptr, GetManager());
}
}
// Test platform node ids on OS's that have platform nodes.
#if !BUILDFLAG(IS_CHROMEOS) && !BUILDFLAG(IS_ANDROID)
IN_PROC_BROWSER_TEST_F(AccessibilityModeTest, ReEnablingDoesNotAlterUniqueIds) {
ASSERT_TRUE(NavigateToURL(shell(), GURL(R"HTML(
data:text/html,<!DOCTYPE html>
<html>
<body>
<button>Button 1</button>
<iframe srcdoc="
<!DOCTYPE html>
<html>
<body>
<button>Button 2</button>
</body>
</html>
"></iframe>
<button>Button 3</button>
</body>
</html>)HTML")));
auto accessibility_mode = web_contents()->GetAccessibilityMode();
// Strip off kNativeAPIs, which may be set in some situations.
accessibility_mode.set_mode(ui::AXMode::kNativeAPIs, false);
// Accessibility should now be off.
ASSERT_TRUE(accessibility_mode.is_mode_off());
EXPECT_EQ(nullptr, GetManager());
// Turn accessibility on.
AccessibilityNotificationWaiter waiter(shell()->web_contents());
BrowserAccessibilityState::GetInstance()->AddAccessibilityModeFlags(
ui::kAXModeComplete);
ASSERT_TRUE(waiter.WaitForNotification());
WaitForAccessibilityTreeToContainNodeWithName(shell()->web_contents(),
"Button 2");
// Save unique ids.
accessibility_mode = web_contents()->GetAccessibilityMode();
ASSERT_TRUE(accessibility_mode.has_mode(ui::AXMode::kNativeAPIs));
ASSERT_TRUE(accessibility_mode.has_mode(ui::AXMode::kWebContents));
EXPECT_NE(nullptr, GetManager());
const ui::BrowserAccessibility* button_1 =
FindNode(ax::mojom::Role::kButton, "Button 1");
ASSERT_NE(nullptr, button_1);
const ui::BrowserAccessibility* button_2 =
FindNode(ax::mojom::Role::kButton, "Button 2");
ASSERT_NE(nullptr, button_2);
int32_t unique_id_1 = button_1->GetAXPlatformNode()->GetUniqueId();
int32_t unique_id_2 = button_2->GetAXPlatformNode()->GetUniqueId();
// Turn accessibility off again.
BrowserAccessibilityState::GetInstance()->ResetAccessibilityMode();
accessibility_mode = web_contents()->GetAccessibilityMode();
ASSERT_TRUE(accessibility_mode.is_mode_off());
EXPECT_EQ(nullptr, GetManager());
// Turn accessibility on again.
AccessibilityNotificationWaiter waiter_3(shell()->web_contents());
BrowserAccessibilityState::GetInstance()->AddAccessibilityModeFlags(
ui::kAXModeBasic);
ASSERT_TRUE(waiter_3.WaitForNotification());
WaitForAccessibilityTreeToContainNodeWithName(shell()->web_contents(),
"Button 2");
// Compare unique id for newly created a11y nodes with previous unique ids.
accessibility_mode = web_contents()->GetAccessibilityMode();
ASSERT_TRUE(accessibility_mode.has_mode(ui::AXMode::kNativeAPIs));
ASSERT_TRUE(accessibility_mode.has_mode(ui::AXMode::kWebContents));
EXPECT_NE(nullptr, GetManager());
const ui::BrowserAccessibility* button_1_refresh =
FindNode(ax::mojom::Role::kButton, "Button 1");
ASSERT_NE(nullptr, button_1_refresh);
// button_1 is now a dangling pointer for the old button.
// The pointers are not the same, proving that button_1_refresh is new.
ASSERT_NE(button_1, button_1_refresh);
const ui::BrowserAccessibility* button_2_refresh =
FindNode(ax::mojom::Role::kButton, "Button 2");
ASSERT_NE(nullptr, button_2_refresh);
// button_2 is now a dangling pointer for the old button.
// The pointers are not the same, proving that button_2_refresh is new.
ASSERT_NE(button_2, button_2_refresh);
EXPECT_EQ(unique_id_1, button_1_refresh->GetAXPlatformNode()->GetUniqueId());
EXPECT_EQ(unique_id_2, button_2_refresh->GetAXPlatformNode()->GetUniqueId());
}
#endif // #if !BUILDFLAG(IS_CHROMEOS) && !BUILDFLAG(IS_ANDROID)
} // namespace content