Bug 1742915 part 1: Move Attributes to base Accessible. r=morgan

The RemoteAccessibleBase implementation is a stub for now, but will be expanded in the next patch.

Differential Revision: https://phabricator.services.mozilla.com/D132652

accessible/atk/AccessibleWrap.cpp

@@ -658,20 +658,12 @@ static AtkAttributeSet* ConvertToAtkAttributeSet(AccAttributes* aAttributes) {
   return objAttributeSet;
 }
 
-AtkAttributeSet* GetAttributeSet(LocalAccessible* aAccessible) {
-  RefPtr<AccAttributes> attributes = aAccessible->Attributes();
-  return ConvertToAtkAttributeSet(attributes);
-}
-
 AtkAttributeSet* getAttributesCB(AtkObject* aAtkObj) {
-  AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj);
-  if (accWrap) return GetAttributeSet(accWrap);
-
-  RemoteAccessible* proxy = GetProxy(aAtkObj);
-  if (!proxy) return nullptr;
-
-  RefPtr<AccAttributes> attributes = nullptr;
-  proxy->Attributes(&attributes);
+  Accessible* acc = GetInternalObj(aAtkObj);
+  if (!acc) {
+    return nullptr;
+  }
+  RefPtr<AccAttributes> attributes = acc->Attributes();
   return ConvertToAtkAttributeSet(attributes);
 }
 

accessible/basetypes/Accessible.h

@@ -18,6 +18,7 @@ struct nsRoleMapEntry;
 namespace mozilla {
 namespace a11y {
 
+class AccAttributes;
 class HyperTextAccessibleBase;
 class LocalAccessible;
 class RemoteAccessible;
@@ -163,6 +164,11 @@ class Accessible {
    */
   virtual uint32_t StartOffset();
 
+  /**
+   * Return object attributes for the accessible.
+   */
+  virtual already_AddRefed<AccAttributes> Attributes() = 0;
+
   // Methods that interact with content.
 
   virtual void TakeFocus() const = 0;

accessible/generic/LocalAccessible.h

@@ -242,10 +242,7 @@ class LocalAccessible : public nsISupports, public Accessible {
    */
   virtual bool NativelyUnavailable() const;
 
-  /**
-   * Return object attributes for the accessible.
-   */
-  virtual already_AddRefed<AccAttributes> Attributes();
+  virtual already_AddRefed<AccAttributes> Attributes() override;
 
   /**
    * Return group position (level, position in set and set size).

accessible/ipc/RemoteAccessibleBase.cpp

@@ -467,6 +467,12 @@ uint64_t RemoteAccessibleBase<Derived>::State() {
   return state;
 }
 
+template <class Derived>
+already_AddRefed<AccAttributes> RemoteAccessibleBase<Derived>::Attributes() {
+  RefPtr<AccAttributes> attributes = new AccAttributes();
+  return attributes.forget();
+}
+
 template <class Derived>
 void RemoteAccessibleBase<Derived>::TakeFocus() const {
   Unused << mDoc->SendTakeFocus(mID);

accessible/ipc/RemoteAccessibleBase.h

@@ -180,6 +180,8 @@ class RemoteAccessibleBase : public Accessible, public HyperTextAccessibleBase {
 
   virtual uint64_t State() override;
 
+  virtual already_AddRefed<AccAttributes> Attributes() override;
+
   // Methods that interact with content.
 
   virtual void TakeFocus() const override;

accessible/ipc/RemoteAccessibleShared.h

@@ -46,7 +46,7 @@ void Description(nsString& aDesc) const override;
 /**
  * Get the set of attributes on the proxied accessible.
  */
-void Attributes(RefPtr<AccAttributes>* aAttributes) const;
+virtual already_AddRefed<AccAttributes> Attributes() override;
 
 /**
  * Return set of targets of given relation type.

accessible/ipc/other/RemoteAccessible.cpp

@@ -62,8 +62,13 @@ void RemoteAccessible::Description(nsString& aDesc) const {
   Unused << mDoc->SendDescription(mID, &aDesc);
 }
 
-void RemoteAccessible::Attributes(RefPtr<AccAttributes>* aAttributes) const {
-  Unused << mDoc->SendAttributes(mID, aAttributes);
+already_AddRefed<AccAttributes> RemoteAccessible::Attributes() {
+  if (StaticPrefs::accessibility_cache_enabled_AtStartup()) {
+    return RemoteAccessibleBase<RemoteAccessible>::Attributes();
+  }
+  RefPtr<AccAttributes> attrs;
+  Unused << mDoc->SendAttributes(mID, &attrs);
+  return attrs.forget();
 }
 
 nsTArray<RemoteAccessible*> RemoteAccessible::RelationByType(

accessible/ipc/win/RemoteAccessible.cpp

@@ -353,28 +353,32 @@ static bool ConvertBSTRAttributesToAccAttributes(
   return true;
 }
 
-void RemoteAccessible::Attributes(RefPtr<AccAttributes>* aAttrs) const {
+already_AddRefed<AccAttributes> RemoteAccessible::Attributes() {
+  if (StaticPrefs::accessibility_cache_enabled_AtStartup()) {
+    return RemoteAccessibleBase<RemoteAccessible>::Attributes();
+  }
+  RefPtr<AccAttributes> attrsObj = new AccAttributes();
   RefPtr<IAccessible> acc;
   if (!GetCOMInterface((void**)getter_AddRefs(acc))) {
-    return;
+    return attrsObj.forget();
   }
 
   RefPtr<IAccessible2> acc2;
   if (FAILED(acc->QueryInterface(IID_IAccessible2,
                                  (void**)getter_AddRefs(acc2)))) {
-    return;
+    return attrsObj.forget();
   }
 
   BSTR attrs;
   HRESULT hr = acc2->get_attributes(&attrs);
   _bstr_t attrsWrap(attrs, false);
   if (FAILED(hr)) {
-    return;
+    return attrsObj.forget();
   }
 
-  *aAttrs = new AccAttributes();
   ConvertBSTRAttributesToAccAttributes(
-      nsDependentString((wchar_t*)attrs, attrsWrap.length()), *aAttrs);
+      nsDependentString((wchar_t*)attrs, attrsWrap.length()), attrsObj);
+  return attrsObj.forget();
 }
 
 nsTArray<RemoteAccessible*> RemoteAccessible::RelationByType(

accessible/mac/MacUtils.mm

@@ -62,13 +62,8 @@ NSString* LocalizedString(const nsString& aString) {
 
 NSString* GetAccAttr(mozAccessible* aNativeAccessible, nsAtom* aAttrName) {
   nsAutoString result;
-  RefPtr<AccAttributes> attributes;
-  if (LocalAccessible* acc = [aNativeAccessible geckoAccessible]->AsLocal()) {
-    attributes = acc->Attributes();
-  } else if (RemoteAccessible* proxy =
-                 [aNativeAccessible geckoAccessible]->AsRemote()) {
-    proxy->Attributes(&attributes);
-  }
+  Accessible* acc = [aNativeAccessible geckoAccessible];
+  RefPtr<AccAttributes> attributes = acc->Attributes();
 
   attributes->GetAttribute(aAttrName, result);
 

accessible/windows/ia2/ia2Accessible.cpp

@@ -453,12 +453,9 @@ ia2Accessible::get_attributes(BSTR* aAttributes) {
   if (!aAttributes) return E_INVALIDARG;
   *aAttributes = nullptr;
 
-  if (!Acc()) {
-    return CO_E_OBJNOTCONNECTED;
-  }
-  AccessibleWrap* acc = LocalAcc();
+  Accessible* acc = Acc();
   if (!acc) {
-    return E_NOTIMPL;  // XXX Not supported for RemoteAccessible yet.
+    return CO_E_OBJNOTCONNECTED;
   }
 
   // The format is name:value;name:value; with \ for escaping these

accessible/xpcom/xpcAccessible.cpp

@@ -359,13 +359,7 @@ xpcAccessible::GetAttributes(nsIPersistentProperties** aAttributes) {
 
   RefPtr<nsPersistentProperties> props = new nsPersistentProperties();
 
-  RefPtr<AccAttributes> attributes;
-  if (LocalAccessible* acc = Intl()) {
-    attributes = acc->Attributes();
-  } else {
-    RemoteAccessible* proxy = IntlGeneric()->AsRemote();
-    proxy->Attributes(&attributes);
-  }
+  RefPtr<AccAttributes> attributes = IntlGeneric()->Attributes();
 
   nsAutoString unused;
   for (auto iter : *attributes) {