MacViews/a11y: Disable most text-specific attributes for protected textfields.

ui/views/widget/native_widget_mac_accessibility_unittest.mm

 // Copyright 2016 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 <memory>
 
 #import <Cocoa/Cocoa.h>
 
+#include "base/mac/mac_util.h"
+#import "base/mac/sdk_forward_declarations.h"
+#include "base/strings/stringprintf.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #import "testing/gtest_mac.h"
 #include "ui/accessibility/ax_enums.h"
 #include "ui/accessibility/ax_node_data.h"
 #import "ui/accessibility/platform/ax_platform_node_mac.h"
 #include "ui/base/ime/text_input_type.h"
 #import "ui/gfx/mac/coordinate_conversion.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/controls/textfield/textfield.h"
@@ skipping 435 matching lines @@
   id ax_node = A11yElementAtMidpoint();
   EXPECT_NSEQ(NSAccessibilityButtonRole,
               AttributeValueAtMidpoint(NSAccessibilityRoleAttribute));
 
   EXPECT_TRUE([[ax_node accessibilityActionNames]
       containsObject:NSAccessibilityPressAction]);
   [ax_node accessibilityPerformAction:NSAccessibilityPressAction];
   EXPECT_TRUE(view->mouse_was_pressed());
 }
 
+// Test text-specific attributes that should not be supported for protected
+// textfields.
+TEST_F(NativeWidgetMacAccessibilityTest, ProtectedTextfields) {
+  Textfield* textfield = AddChildTextfield(GetWidgetBounds().size());
+  textfield->SetTextInputType(ui::TEXT_INPUT_TYPE_PASSWORD);
+
+  // Get the Textfield accessibility object.
+  NSPoint midpoint = gfx::ScreenPointToNSPoint(GetWidgetBounds().CenterPoint());
+  id ax_node = [widget()->GetNativeWindow() accessibilityHitTest:midpoint];
+  EXPECT_TRUE(ax_node);
+
+  // Create a native Cocoa NSSecureTextField to compare against.
+  base::scoped_nsobject<NSSecureTextField> cocoa_secure_textfield(
+      [[NSSecureTextField alloc] initWithFrame:NSMakeRect(0, 0, 10, 10)]);
+
+  NSArray* views_attributes = [ax_node accessibilityAttributeNames];
+  NSArray* cocoa_attributes =
+      [cocoa_secure_textfield accessibilityAttributeNames];
+
+  NSArray* const expected_supported_attributes = @[
+    NSAccessibilityValueAttribute, NSAccessibilityPlaceholderValueAttribute
+  ];
+  NSArray* const expected_unsupported_attributes = @[
+    NSAccessibilitySelectedTextAttribute,
+    NSAccessibilitySelectedTextRangeAttribute,
+    NSAccessibilityNumberOfCharactersAttribute,
+    NSAccessibilityVisibleCharacterRangeAttribute,
+    NSAccessibilityInsertionPointLineNumberAttribute
+  ];
+
+  for (NSString* attribute_name in expected_supported_attributes) {
+    SCOPED_TRACE(base::SysNSStringToUTF8([NSString
+        stringWithFormat:@"Missing attribute is: %@", attribute_name]));
+    EXPECT_TRUE([views_attributes containsObject:attribute_name]);
+  }
+  if (base::mac::IsAtLeastOS10_10()) {
+    // Check Cocoa's attribute values for PlaceHolder and Value here separately
+    // - these are using the new NSAccessibility protocol.
+    EXPECT_TRUE([cocoa_secure_textfield
+        isAccessibilitySelectorAllowed:@selector(
+                                           accessibilityPlaceholderValue)]);
+    EXPECT_TRUE([cocoa_secure_textfield
+        isAccessibilitySelectorAllowed:@selector(accessibilityValue)]);
+  }
+
+  EXPECT_FALSE(
+      [ax_node accessibilityIsAttributeSettable:NSAccessibilityValueAttribute]);
+
+  for (NSString* attribute_name in expected_unsupported_attributes) {
+    SCOPED_TRACE(base::SysNSStringToUTF8([NSString
+        stringWithFormat:@"Missing attribute is: %@", attribute_name]));
+    EXPECT_FALSE([views_attributes containsObject:attribute_name]);
+    EXPECT_FALSE([cocoa_attributes containsObject:attribute_name]);
+  }
+}
+
 }  // namespace views