Added a11y state description for aria-current nodes on Android

This CL updates the behavior of aria-current nodes on Android.

With this change, the value of aria-current (e.g. "date",
"page", "location", etc.) will be read as a part of the state
description for that node on Android. For example, if
aria-current="page", then the node will announce "current page".

We append this status as part of the state description in the
AccessibilityNodeInfo object.

This CL also updates associated unit test expectations.


AX-Relnotes: aria-current nodes now explicitly announce their state.
Bug: 1093578
Change-Id: I6028f235e663e7df5ce4e626db16f68acbbc9b65
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2493660Reviewed-by: danakj <danakj@chromium.org>
Reviewed-by: Mark Schillaci <mschillaci@google.com>
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Commit-Queue: Mark Schillaci <mschillaci@google.com>
Cr-Commit-Position: refs/heads/master@{#821323}

content/browser/accessibility/browser_accessibility_android.cc

@@ -578,6 +578,10 @@ base::string16 BrowserAccessibilityAndroid::GetStateDescription() const {
   if (GetRole() == ax::mojom::Role::kListBoxOption)
     state_descs.push_back(GetListBoxItemStateDescription());
 
+  // For nodes with non-trivial aria-current values, communicate state.
+  if (HasAriaCurrent())
+    state_descs.push_back(GetAriaCurrentStateDescription());
+
   // Concatenate all state descriptions and return.
   return base::JoinString(state_descs, base::ASCIIToUTF16(" "));
 }
@@ -670,6 +674,47 @@ base::string16 BrowserAccessibilityAndroid::GetListBoxItemStateDescription()
       nullptr);
 }
 
+base::string16 BrowserAccessibilityAndroid::GetAriaCurrentStateDescription()
+    const {
+  content::ContentClient* content_client = content::GetContentClient();
+
+  base::string16 aria_current_state;
+
+  switch (static_cast<ax::mojom::AriaCurrentState>(
+      GetIntAttribute(ax::mojom::IntAttribute::kAriaCurrentState))) {
+    case ax::mojom::AriaCurrentState::kPage:
+      aria_current_state =
+          content_client->GetLocalizedString(IDS_AX_ARIA_CURRENT_PAGE);
+      break;
+    case ax::mojom::AriaCurrentState::kStep:
+      aria_current_state =
+          content_client->GetLocalizedString(IDS_AX_ARIA_CURRENT_STEP);
+      break;
+    case ax::mojom::AriaCurrentState::kLocation:
+      aria_current_state =
+          content_client->GetLocalizedString(IDS_AX_ARIA_CURRENT_LOCATION);
+      break;
+    case ax::mojom::AriaCurrentState::kDate:
+      aria_current_state =
+          content_client->GetLocalizedString(IDS_AX_ARIA_CURRENT_DATE);
+      break;
+    case ax::mojom::AriaCurrentState::kTime:
+      aria_current_state =
+          content_client->GetLocalizedString(IDS_AX_ARIA_CURRENT_TIME);
+      break;
+    case ax::mojom::AriaCurrentState::kTrue:
+    default:
+      aria_current_state =
+          content_client->GetLocalizedString(IDS_AX_ARIA_CURRENT_TRUE);
+      break;
+  }
+
+  return base::ReplaceStringPlaceholders(
+      content_client->GetLocalizedString(
+          IDS_AX_ARIA_CURRENT_STATE_DESCRIPTION_BASE),
+      aria_current_state, nullptr);
+}
+
 std::string BrowserAccessibilityAndroid::GetRoleString() const {
   return ui::ToString(GetRole());
 }
@@ -1908,6 +1953,17 @@ void BrowserAccessibilityAndroid::GetSuggestions(
   }
 }
 
+bool BrowserAccessibilityAndroid::HasAriaCurrent() const {
+  if (!HasIntAttribute(ax::mojom::IntAttribute::kAriaCurrentState))
+    return false;
+
+  auto current = static_cast<ax::mojom::AriaCurrentState>(
+      GetIntAttribute(ax::mojom::IntAttribute::kAriaCurrentState));
+
+  return current != ax::mojom::AriaCurrentState::kNone &&
+         current != ax::mojom::AriaCurrentState::kFalse;
+}
+
 bool BrowserAccessibilityAndroid::HasNonEmptyValue() const {
   return IsTextField() && !GetValueForControl().empty();
 }

content/browser/accessibility/browser_accessibility_android.h

@@ -73,6 +73,8 @@ class CONTENT_EXPORT BrowserAccessibilityAndroid : public BrowserAccessibility {
 
   bool CanOpenPopup() const;
 
+  bool HasAriaCurrent() const;
+
   bool HasFocusableNonOptionChild() const;
   bool HasNonEmptyValue() const;
 
@@ -96,6 +98,7 @@ class CONTENT_EXPORT BrowserAccessibilityAndroid : public BrowserAccessibility {
   base::string16 GetCheckboxStateDescription() const;
   base::string16 GetListBoxStateDescription() const;
   base::string16 GetListBoxItemStateDescription() const;
+  base::string16 GetAriaCurrentStateDescription() const;
 
   base::string16 GetRoleDescription() const;
 

content/test/data/accessibility/aria/aria-current-expected-android.txt

+android.webkit.WebView focusable focused scrollable
+++android.view.View role_description='link' clickable focusable link name='Section one'
+++++android.widget.TextView name='Section one'
+++android.widget.TextView name=' '
+++android.view.View role_description='link' clickable focusable link name='Section two'
+++++android.widget.TextView name='Section two'
+++android.widget.TextView name=' '
+++android.view.View role_description='link' clickable focusable link name='Section three' state_description='current location'
+++++android.widget.TextView name='Section three'
+++android.view.View name='<newline>'
+++android.view.View role_description='heading 1' heading name='Section one heading'
+++android.view.View role_description='heading 1' heading name='Section two heading'
+++android.view.View role_description='heading 1' heading name='Section three heading'
+++android.view.View name='<newline>'
+++android.view.View
+++++android.widget.TextView name='Span 1'
+++++android.widget.TextView name=' '
+++++android.view.View name='Span 2' state_description='current item'
+++++android.widget.TextView name=' '
+++++android.widget.TextView name='Span 3'
+++android.view.View name='aria-current is true' state_description='current item'
+++android.view.View name='aria-current is false'
+++android.view.View name='aria-current is time' state_description='current time'
+++android.view.View name='aria-current is date' state_description='current date'
+++android.view.View name='aria-current is location' state_description='current location'
+++android.view.View name='aria-current is step' state_description='current step'
+++android.view.View name='aria-current is page' state_description='current page'
+++android.view.View name='aria-current is empty string'

content/test/data/accessibility/aria/aria-current-expected-auralinux.txt

@@ -22,3 +22,19 @@
 ++++++[static] name='Span 2'
 ++++[static] name=' '
 ++++[static] name='Span 3'
+++[paragraph] current:true
+++++[static] name='aria-current is true'
+++[paragraph] current:false
+++++[static] name='aria-current is false'
+++[paragraph] current:time
+++++[static] name='aria-current is time'
+++[paragraph] current:date
+++++[static] name='aria-current is date'
+++[paragraph] current:location
+++++[static] name='aria-current is location'
+++[paragraph] current:step
+++++[static] name='aria-current is step'
+++[paragraph] current:page
+++++[static] name='aria-current is page'
+++[paragraph]
+++++[static] name='aria-current is empty string'
\ No newline at end of file

content/test/data/accessibility/aria/aria-current-expected-blink.txt

@@ -39,3 +39,27 @@ rootWebArea
 ++++++++++inlineTextBox name=' '
 ++++++++staticText name='Span 3'
 ++++++++++inlineTextBox name='Span 3'
+++++++paragraph ariaCurrentState=true
+++++++++staticText name='aria-current is true'
+++++++++++inlineTextBox name='aria-current is true'
+++++++paragraph ariaCurrentState=false
+++++++++staticText name='aria-current is false'
+++++++++++inlineTextBox name='aria-current is false'
+++++++paragraph ariaCurrentState=time
+++++++++staticText name='aria-current is time'
+++++++++++inlineTextBox name='aria-current is time'
+++++++paragraph ariaCurrentState=date
+++++++++staticText name='aria-current is date'
+++++++++++inlineTextBox name='aria-current is date'
+++++++paragraph ariaCurrentState=location
+++++++++staticText name='aria-current is location'
+++++++++++inlineTextBox name='aria-current is location'
+++++++paragraph ariaCurrentState=step
+++++++++staticText name='aria-current is step'
+++++++++++inlineTextBox name='aria-current is step'
+++++++paragraph ariaCurrentState=page
+++++++++staticText name='aria-current is page'
+++++++++++inlineTextBox name='aria-current is page'
+++++++paragraph
+++++++++staticText name='aria-current is empty string'
+++++++++++inlineTextBox name='aria-current is empty string'
\ No newline at end of file

content/test/data/accessibility/aria/aria-current-expected-win.txt

@@ -21,4 +21,20 @@ ROLE_SYSTEM_DOCUMENT READONLY FOCUSABLE
 ++++IA2_ROLE_SECTION current:true
 ++++++ROLE_SYSTEM_STATICTEXT name='Span 2'
 ++++ROLE_SYSTEM_STATICTEXT name=' '
-++++ROLE_SYSTEM_STATICTEXT name='Span 3'
+++++ROLE_SYSTEM_STATICTEXT name='Span 3'
\ No newline at end of file
+++IA2_ROLE_PARAGRAPH current:true
+++++ROLE_SYSTEM_STATICTEXT name='aria-current is true'
+++IA2_ROLE_PARAGRAPH current:false
+++++ROLE_SYSTEM_STATICTEXT name='aria-current is false'
+++IA2_ROLE_PARAGRAPH current:time
+++++ROLE_SYSTEM_STATICTEXT name='aria-current is time'
+++IA2_ROLE_PARAGRAPH current:date
+++++ROLE_SYSTEM_STATICTEXT name='aria-current is date'
+++IA2_ROLE_PARAGRAPH current:location
+++++ROLE_SYSTEM_STATICTEXT name='aria-current is location'
+++IA2_ROLE_PARAGRAPH current:step
+++++ROLE_SYSTEM_STATICTEXT name='aria-current is step'
+++IA2_ROLE_PARAGRAPH current:page
+++++ROLE_SYSTEM_STATICTEXT name='aria-current is page'
+++IA2_ROLE_PARAGRAPH
+++++ROLE_SYSTEM_STATICTEXT name='aria-current is empty string'
\ No newline at end of file

content/test/data/accessibility/aria/aria-current.html

@@ -19,5 +19,13 @@
     <span aria-current="true">Span 2</span>
     <span>Span 3</span>
   </div>
+  <p aria-current="true">aria-current is true</p>
+  <p aria-current="false">aria-current is false</p>
+  <p aria-current="time">aria-current is time</p>
+  <p aria-current="date">aria-current is date</p>
+  <p aria-current="location">aria-current is location</p>
+  <p aria-current="step">aria-current is step</p>
+  <p aria-current="page">aria-current is page</p>
+  <p aria-current="">aria-current is empty string</p>
 </body>
 </html>

third_party/blink/public/strings/blink_strings.grd

@@ -805,6 +805,27 @@ below:
         <message name="IDS_AX_LIST_BOX_ITEM_STATE_DESCRIPTION" desc="Accessibility state description for an item that is part of a list box">
           in list, item <ph name="INDEX">$1<ex>1</ex></ph> of <ph name="COUNT">$2<ex>3</ex></ph>
         </message>
+        <message name="IDS_AX_ARIA_CURRENT_STATE_DESCRIPTION_BASE" desc="Accessibility state description for a node that has aria-current value set to something other than false">
+          current <ph name="TYPE">$1<ex>page</ex></ph>
+        </message>
+        <message name="IDS_AX_ARIA_CURRENT_PAGE" desc="Accessibility state description for aria-current value of page.">
+          page
+        </message>
+        <message name="IDS_AX_ARIA_CURRENT_STEP" desc="Accessibility state description for aria-current value of step.">
+          step
+        </message>
+        <message name="IDS_AX_ARIA_CURRENT_LOCATION" desc="Accessibility state description for aria-current value of location.">
+          location
+        </message>
+        <message name="IDS_AX_ARIA_CURRENT_DATE" desc="Accessibility state description for aria-current value of date.">
+          date
+        </message>
+        <message name="IDS_AX_ARIA_CURRENT_TIME" desc="Accessibility state description for aria-current value of time.">
+          time
+        </message>
+        <message name="IDS_AX_ARIA_CURRENT_TRUE" desc="Accessibility state description for aria-current value of true.">
+          item
+        </message>
       </if>
 
       <!-- Automatic image annotations for accessibility -->

third_party/blink/public/strings/blink_strings_grd/IDS_AX_ARIA_CURRENT_DATE.png.sha1

+5c5e9686c2277aa998a4a271e5166c8d0cba8b9e
\ No newline at end of file

third_party/blink/public/strings/blink_strings_grd/IDS_AX_ARIA_CURRENT_LOCATION.png.sha1

+59a0673045e1793e36f1312e11a330271f296f60
\ No newline at end of file

third_party/blink/public/strings/blink_strings_grd/IDS_AX_ARIA_CURRENT_PAGE.png.sha1

+9ea85c50785469543867f7152f1c3be0489d95f4
\ No newline at end of file

third_party/blink/public/strings/blink_strings_grd/IDS_AX_ARIA_CURRENT_STATE_DESCRIPTION_BASE.png.sha1

+493f231daab8a46d4e2e9a1f6e82c771a9269db7
\ No newline at end of file

third_party/blink/public/strings/blink_strings_grd/IDS_AX_ARIA_CURRENT_STEP.png.sha1

+42fe4f745cb09a95ecb4820c3c2abd8eb6c7d813
\ No newline at end of file

third_party/blink/public/strings/blink_strings_grd/IDS_AX_ARIA_CURRENT_TIME.png.sha1

+052c3ce2f0154d34fcf38469aaaf1c0532f7646e
\ No newline at end of file

third_party/blink/public/strings/blink_strings_grd/IDS_AX_ARIA_CURRENT_TRUE.png.sha1

+de2faaa74be06d01cd11e3b910371ba665984ed0
\ No newline at end of file