Bug 1760939 part 1: Move EmbeddedChildCount to Accessible. r=eeejay

Differential Revision: https://phabricator.services.mozilla.com/D142027

accessible/atk/AccessibleWrap.cpp

@@ -692,28 +692,11 @@ AtkObject* getParentCB(AtkObject* aAtkObj) {
 }
 
 gint getChildCountCB(AtkObject* aAtkObj) {
-  if (AccessibleWrap* accWrap = GetAccessibleWrap(aAtkObj)) {
-    if (nsAccUtils::MustPrune(accWrap)) {
-      return 0;
-    }
-
-    uint32_t count = accWrap->EmbeddedChildCount();
-    if (count) {
-      return static_cast<gint>(count);
-    }
-
-    OuterDocAccessible* outerDoc = accWrap->AsOuterDoc();
-    if (outerDoc && outerDoc->RemoteChildDoc()) {
-      return 1;
-    }
+  Accessible* acc = GetInternalObj(aAtkObj);
+  if (!acc || nsAccUtils::MustPrune(acc)) {
+    return 0;
   }
-
-  RemoteAccessible* proxy = GetProxy(aAtkObj);
-  if (proxy && !nsAccUtils::MustPrune(proxy)) {
-    return proxy->EmbeddedChildCount();
-  }
-
-  return 0;
+  return static_cast<gint>(acc->EmbeddedChildCount());
 }
 
 AtkObject* refChildCB(AtkObject* aAtkObj, gint aChildIndex) {

accessible/basetypes/Accessible.h

@@ -155,6 +155,11 @@ class Accessible {
    */
   virtual GroupPos GroupPosition();
 
+  /**
+   * Return embedded accessible children count.
+   */
+  virtual uint32_t EmbeddedChildCount() = 0;
+
   /**
    * Return embedded accessible child at the given index.
    */

accessible/generic/LocalAccessible.h

@@ -361,10 +361,7 @@ class LocalAccessible : public nsISupports, public Accessible {
     return childCount != 0 ? LocalChildAt(childCount - 1) : nullptr;
   }
 
-  /**
-   * Return embedded accessible children count.
-   */
-  uint32_t EmbeddedChildCount();
+  virtual uint32_t EmbeddedChildCount() override;
 
   /**
    * Return embedded accessible child at the given index.

accessible/ipc/RemoteAccessibleBase.cpp

@@ -94,7 +94,7 @@ void RemoteAccessibleBase<Derived>::ClearChildDoc(
 }
 
 template <class Derived>
-uint32_t RemoteAccessibleBase<Derived>::EmbeddedChildCount() const {
+uint32_t RemoteAccessibleBase<Derived>::EmbeddedChildCount() {
   size_t count = 0, kids = mChildren.Length();
   for (size_t i = 0; i < kids; i++) {
     if (mChildren[i]->IsEmbeddedObject()) {

accessible/ipc/RemoteAccessibleBase.h

@@ -102,7 +102,7 @@ class RemoteAccessibleBase : public Accessible, public HyperTextAccessibleBase {
     }
     return parent->mChildren.IndexOf(static_cast<const Derived*>(this));
   }
-  uint32_t EmbeddedChildCount() const;
+  virtual uint32_t EmbeddedChildCount() override;
   virtual int32_t IndexOfEmbeddedChild(Accessible* aChild) override;
   virtual Accessible* EmbeddedChildAt(uint32_t aChildIdx) override;