Bug 1642030 - Support testing of parameterized attributes in Mac mochitests. r=morgan

Depends on D77559

Differential Revision: https://phabricator.services.mozilla.com/D77562

accessible/interfaces/nsIAccessibleMacInterface.idl

@@ -15,11 +15,17 @@
 interface nsIAccessibleMacInterface : nsISupports
 {
   /**
-   * List of available attribute names for tthe object.
+   * List of available attribute names for the object.
    * Emulates `AXUIElementCopyAttributeNames`.
    */
   readonly attribute Array<AString> attributeNames;
 
+  /**
+   * List of available parameterized attribute names for the object.
+   * Emulates `AXUIElementCopyParameterizedAttributeNames`.
+   */
+  readonly attribute Array<AString> parameterizedAttributeNames;
+
   /**
    * List of available action names for tthe object.
    * Emulates `AXUIElementCopyActionNames`.
@@ -33,6 +39,13 @@ interface nsIAccessibleMacInterface : nsISupports
   [implicit_jscontext]
   jsval getAttributeValue(in AString attributeName);
 
+  /**
+   * Returns the value of an attribute given a name and a parameter.
+   * Emulates `AXUIElementCopyParameterizedAttributeValue`.
+   **/
+  [implicit_jscontext]
+  jsval getParameterizedAttributeValue(in AString attributeName, in jsval parameter);
+
   /**
    * Requests that the accessibility object perform the specified action.
    * Emulatets `AXUIElementPerformAction`.

accessible/tests/browser/mac/browser_input.js

@@ -81,5 +81,11 @@ addAccessibleTask(
     });
 
     Assert.deepEqual(domSelection, [1, 8], "correct DOM selection");
+
+    is(
+      input.getParameterizedAttributeValue("AXStringForRange", NSRange(3, 5)),
+      "er Fu",
+      "AXStringForRange works"
+    );
   }
 );

accessible/xpcom/xpcAccessibleMacInterface.mm

@@ -47,6 +47,25 @@ xpcAccessibleMacInterface::GetAttributeNames(nsTArray<nsString>& aAttributeNames
   NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT
 }
 
+NS_IMETHODIMP
+xpcAccessibleMacInterface::GetParameterizedAttributeNames(nsTArray<nsString>& aAttributeNames) {
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT
+
+  if (!mNativeObject || [mNativeObject isExpired]) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  for (NSString* name in [mNativeObject accessibilityParameterizedAttributeNames]) {
+    nsAutoString attribName;
+    nsCocoaUtils::GetStringForNSString(name, attribName);
+    aAttributeNames.AppendElement(attribName);
+  }
+
+  return NS_OK;
+
+  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT
+}
+
 NS_IMETHODIMP
 xpcAccessibleMacInterface::GetActionNames(nsTArray<nsString>& aActionNames) {
   NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT
@@ -127,6 +146,22 @@ xpcAccessibleMacInterface::SetAttributeValue(const nsAString& aAttributeName,
   return NS_ERROR_NOT_IMPLEMENTED;
 }
 
+NS_IMETHODIMP
+xpcAccessibleMacInterface::GetParameterizedAttributeValue(const nsAString& aAttributeName,
+                                                          JS::HandleValue aParameter,
+                                                          JSContext* aCx,
+                                                          JS::MutableHandleValue aResult) {
+  nsresult rv = NS_OK;
+  id paramObj = JsValueToNSObject(aParameter, aCx, &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  NSString* attribName = nsCocoaUtils::ToNSString(aAttributeName);
+  return NSObjectToJsValue(
+      [mNativeObject accessibilityAttributeValue:attribName forParameter:paramObj], aCx, aResult);
+
+  return NS_OK;
+}
+
 bool xpcAccessibleMacInterface::SupportsSelector(SEL aSelector) {
   // return true if we have this selector, and if isAccessibilitySelectorAllowed
   // is implemented too whether it is "allowed".