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
|
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <set>
#include <string>
#include <vector>
#include "base/logging.h"
#include "base/strings/string16.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "content/browser/accessibility/browser_accessibility_android.h"
#include "content/browser/accessibility/browser_accessibility_manager_android.h"
#include "content/browser/web_contents/web_contents_impl.h"
#include "content/public/browser/web_contents.h"
#include "content/public/common/url_constants.h"
#include "content/public/test/content_browser_test.h"
#include "content/public/test/content_browser_test_utils.h"
#include "content/shell/browser/shell.h"
#include "content/test/accessibility_browser_test_utils.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace content {
const int GRANULARITY_CHARACTER =
ANDROID_ACCESSIBILITY_NODE_INFO_MOVEMENT_GRANULARITY_CHARACTER;
const int GRANULARITY_WORD =
ANDROID_ACCESSIBILITY_NODE_INFO_MOVEMENT_GRANULARITY_WORD;
const int GRANULARITY_LINE =
ANDROID_ACCESSIBILITY_NODE_INFO_MOVEMENT_GRANULARITY_LINE;
class AndroidGranularityMovementBrowserTest : public ContentBrowserTest {
public:
AndroidGranularityMovementBrowserTest() {}
~AndroidGranularityMovementBrowserTest() override {}
BrowserAccessibility* LoadUrlAndGetAccessibilityRoot(const GURL& url) {
NavigateToURL(shell(), GURL(url::kAboutBlankURL));
// Load the page.
AccessibilityNotificationWaiter waiter(
shell(), AccessibilityModeComplete,
ui::AX_EVENT_LOAD_COMPLETE);
NavigateToURL(shell(), url);
waiter.WaitForNotification();
// Get the BrowserAccessibilityManager.
WebContentsImpl* web_contents =
static_cast<WebContentsImpl*>(shell()->web_contents());
return web_contents->GetRootBrowserAccessibilityManager()->GetRoot();
}
// First, set accessibility focus to a node and wait for the update that
// loads inline text boxes for that node. (We load inline text boxes
// asynchronously on Android since we only ever need them for the node
// with accessibility focus.)
//
// Then call NextAtGranularity repeatedly and return a string that
// concatenates all of the text of the returned text ranges.
//
// As an example, if the node's text is "cat dog" and you traverse by
// word, this returns "'cat', 'dog'".
//
// Also calls PreviousAtGranularity from the end back to the beginning
// and fails (by logging an error and returning the empty string) if
// the result when traversing backwards is not the same
// (but in reverse order).
base::string16 TraverseNodeAtGranularity(
BrowserAccessibility* node,
int granularity) {
AccessibilityNotificationWaiter waiter(
shell(), AccessibilityModeComplete,
ui::AX_EVENT_TREE_CHANGED);
node->manager()->delegate()->AccessibilitySetAccessibilityFocus(
node->GetId());
waiter.WaitForNotification();
int start_index = -1;
int end_index = -1;
BrowserAccessibilityAndroid* android_node =
static_cast<BrowserAccessibilityAndroid*>(node);
BrowserAccessibilityManagerAndroid* manager =
static_cast<BrowserAccessibilityManagerAndroid*>(node->manager());
base::string16 text = android_node->GetText();
base::string16 concatenated;
int previous_end_index = -1;
while (manager->NextAtGranularity(
granularity, end_index, android_node,
&start_index, &end_index)) {
int len = (granularity == GRANULARITY_CHARACTER) ?
1 : end_index - start_index;
base::string16 selection = text.substr(start_index, len);
if (base::EndsWith(selection, base::ASCIIToUTF16("\n"), false))
selection.erase(selection.size() - 1);
if (!selection.empty()) {
if (!concatenated.empty())
concatenated += base::ASCIIToUTF16(", ");
concatenated += base::ASCIIToUTF16("'") + selection +
base::ASCIIToUTF16("'");
}
// Prevent an endless loop.
if (end_index == previous_end_index) {
LOG(ERROR) << "Bailing from loop, NextAtGranularity didn't advance";
break;
}
previous_end_index = end_index;
}
base::string16 reverse;
previous_end_index = -1;
start_index = end_index;
while (manager->PreviousAtGranularity(
granularity, start_index, android_node, &start_index, &end_index)) {
int len = (granularity == GRANULARITY_CHARACTER) ?
1 : end_index - start_index;
base::string16 selection = text.substr(start_index, len);
if (base::EndsWith(selection, base::ASCIIToUTF16("\n"), false))
selection = selection.substr(0, selection.size() - 1);
if (!reverse.empty())
reverse = base::ASCIIToUTF16(", ") + reverse;
reverse = base::ASCIIToUTF16("'") + selection +
base::ASCIIToUTF16("'") + reverse;
// Prevent an endless loop.
if (end_index == previous_end_index) {
LOG(ERROR) << "Bailing from loop, PreviousAtGranularity didn't advance";
break;
}
previous_end_index = end_index;
}
if (concatenated != reverse) {
LOG(ERROR) << "Did not get the same sequence in the forwards and "
<< "reverse directions!";
LOG(ERROR) << "Forwards: " << concatenated;
LOG(ERROR) << "Backwards " << reverse;
return base::string16();
}
return concatenated;
}
};
IN_PROC_BROWSER_TEST_F(AndroidGranularityMovementBrowserTest,
NavigateByCharacters) {
GURL url("data:text/html,"
"<body>"
"<p>One, two, three!</p>"
"<button aria-label='Seven, eight, nine!'>Four, five, six!</button>"
"</body></html>");
BrowserAccessibility* root = LoadUrlAndGetAccessibilityRoot(url);
ASSERT_EQ(2U, root->PlatformChildCount());
BrowserAccessibility* para = root->PlatformGetChild(0);
ASSERT_EQ(0U, para->PlatformChildCount());
BrowserAccessibility* button_container = root->PlatformGetChild(1);
ASSERT_EQ(1U, button_container->PlatformChildCount());
BrowserAccessibility* button = button_container->PlatformGetChild(0);
ASSERT_EQ(0U, button->PlatformChildCount());
ASSERT_EQ(
base::ASCIIToUTF16("'O', 'n', 'e', ',', ' ', 't', 'w', 'o', "
"',', ' ', 't', 'h', 'r', 'e', 'e', '!'"),
TraverseNodeAtGranularity(para, GRANULARITY_CHARACTER));
ASSERT_EQ(
base::ASCIIToUTF16("'S', 'e', 'v', 'e', 'n', ',', ' ', 'e', 'i', 'g', "
"'h', 't', ',', ' ', 'n', 'i', 'n', 'e', '!'"),
TraverseNodeAtGranularity(button, GRANULARITY_CHARACTER));
}
IN_PROC_BROWSER_TEST_F(AndroidGranularityMovementBrowserTest,
NavigateByWords) {
GURL url("data:text/html,"
"<body>"
"<p>One, two, three!</p>"
"<button aria-label='Seven, eight, nine!'>Four, five, six!</button>"
"</body></html>");
BrowserAccessibility* root = LoadUrlAndGetAccessibilityRoot(url);
ASSERT_EQ(2U, root->PlatformChildCount());
BrowserAccessibility* para = root->PlatformGetChild(0);
ASSERT_EQ(0U, para->PlatformChildCount());
BrowserAccessibility* button_container = root->PlatformGetChild(1);
ASSERT_EQ(1U, button_container->PlatformChildCount());
BrowserAccessibility* button = button_container->PlatformGetChild(0);
ASSERT_EQ(0U, button->PlatformChildCount());
ASSERT_EQ(base::ASCIIToUTF16("'One', 'two', 'three'"),
TraverseNodeAtGranularity(para, GRANULARITY_WORD));
ASSERT_EQ(base::ASCIIToUTF16("'Seven', 'eight', 'nine'"),
TraverseNodeAtGranularity(button, GRANULARITY_WORD));
}
IN_PROC_BROWSER_TEST_F(AndroidGranularityMovementBrowserTest,
NavigateByLine) {
GURL url("data:text/html,"
"<body>"
"<pre>One,%0dtwo,%0dthree!</pre>"
"</body>");
BrowserAccessibility* root = LoadUrlAndGetAccessibilityRoot(url);
ASSERT_EQ(1U, root->PlatformChildCount());
BrowserAccessibility* pre = root->PlatformGetChild(0);
ASSERT_EQ(0U, pre->PlatformChildCount());
ASSERT_EQ(base::ASCIIToUTF16("'One,', 'two,', 'three!'"),
TraverseNodeAtGranularity(pre, GRANULARITY_LINE));
}
} // namespace content
|
