Bug 1754360: Move EndOffset to base Accessible. r=eeejay

Similar to StartOffset:

1. There was a Windows non-cached RemoteAccessible implementation, but it was never actually called, so I removed it.
2. The sync IPDL RemoteAccessible implementation previously provided a boolean indicating success.
    I removed this because the LocalAccessible implementation doesn't have this and it doesn't seem like remote is special in this respect.

Differential Revision: https://phabricator.services.mozilla.com/D138243

accessible/atk/nsMaiHyperlink.cpp

@@ -184,13 +184,7 @@ gint getEndIndexCB(AtkHyperlink* aLink) {
   MaiHyperlink* maiLink = GetMaiHyperlink(aLink);
   if (!maiLink) return false;
 
-  if (LocalAccessible* hyperlink = maiLink->GetAccHyperlink()) {
+  return static_cast<gint>(maiLink->Acc()->EndOffset());
-    return static_cast<gint>(hyperlink->EndOffset());
-  }
-
-  bool valid = false;
-  uint32_t endIdx = maiLink->Proxy()->EndOffset(&valid);
-  return valid ? static_cast<gint>(endIdx) : -1;
 }
 
 gint getStartIndexCB(AtkHyperlink* aLink) {

accessible/basetypes/Accessible.cpp

@@ -82,6 +82,14 @@ uint32_t Accessible::StartOffset() {
   return hyperText ? hyperText->GetChildOffset(this) : 0;
 }
 
+uint32_t Accessible::EndOffset() {
+  MOZ_ASSERT(IsLink(), "EndOffset is called on not hyper link!");
+  Accessible* parent = Parent();
+  HyperTextAccessibleBase* hyperText =
+      parent ? parent->AsHyperTextBase() : nullptr;
+  return hyperText ? (hyperText->GetChildOffset(this) + 1) : 0;
+}
+
 GroupPos Accessible::GroupPosition() {
   GroupPos groupPos;
 

accessible/basetypes/Accessible.h

@@ -187,6 +187,12 @@ class Accessible {
    */
   virtual uint32_t StartOffset();
 
+  /**
+   * Return the end offset of the link within the parent
+   * HyperTextAccessibleBase.
+   */
+  virtual uint32_t EndOffset();
+
   /**
    * Return object attributes for the accessible.
    */

accessible/generic/LocalAccessible.cpp

@@ -2732,13 +2732,6 @@ bool LocalAccessible::IsLink() const {
   return mParent && mParent->IsHyperText() && !IsText();
 }
 
-uint32_t LocalAccessible::EndOffset() {
-  MOZ_ASSERT(IsLink(), "EndOffset is called on not hyper link!");
-
-  HyperTextAccessible* hyperText = mParent ? mParent->AsHyperText() : nullptr;
-  return hyperText ? (hyperText->GetChildOffset(this) + 1) : 0;
-}
-
 uint32_t LocalAccessible::AnchorCount() {
   MOZ_ASSERT(IsLink(), "AnchorCount is called on not hyper link!");
   return 1;

accessible/generic/LocalAccessible.h

@@ -531,11 +531,6 @@ class LocalAccessible : public nsISupports, public Accessible {
    */
   virtual bool IsLink() const override;
 
-  /**
-   * Return the end offset of the link within the parent accessible.
-   */
-  virtual uint32_t EndOffset();
-
   /**
    * Return true if the link is valid (e. g. points to a valid URL).
    */

accessible/ipc/RemoteAccessibleShared.h

@@ -139,8 +139,6 @@ LayoutDeviceIntPoint ImagePosition(uint32_t aCoordType);
 
 LayoutDeviceIntSize ImageSize();
 
-uint32_t EndOffset(bool* aOk);
-
 bool IsLinkValid();
 
 uint32_t AnchorCount(bool* aOk);

accessible/ipc/other/RemoteAccessible.cpp

@@ -399,9 +399,13 @@ uint32_t RemoteAccessible::StartOffset() {
   return retVal;
 }
 
-uint32_t RemoteAccessible::EndOffset(bool* aOk) {
+uint32_t RemoteAccessible::EndOffset() {
+  if (StaticPrefs::accessibility_cache_enabled_AtStartup()) {
+    return RemoteAccessibleBase<RemoteAccessible>::EndOffset();
+  }
+  bool ok;
   uint32_t retVal = 0;
-  Unused << mDoc->SendEndOffset(mID, &retVal, aOk);
+  Unused << mDoc->SendEndOffset(mID, &retVal, &ok);
   return retVal;
 }
 

accessible/ipc/other/RemoteAccessible.h

@@ -42,6 +42,7 @@ class RemoteAccessible : public RemoteAccessibleBase<RemoteAccessible> {
   virtual already_AddRefed<AccAttributes> DefaultTextAttributes() override;
 
   virtual uint32_t StartOffset() override;
+  virtual uint32_t EndOffset() override;
 
   virtual int32_t LinkIndexAtOffset(uint32_t aOffset) override;
 

accessible/ipc/win/RemoteAccessible.cpp

@@ -730,18 +730,6 @@ void RemoteAccessible::ScrollSubstringToPoint(int32_t aStartOffset,
                               static_cast<long>(aX), static_cast<long>(aY));
 }
 
-uint32_t RemoteAccessible::EndOffset(bool* aOk) {
-  RefPtr<IAccessibleHyperlink> acc = QueryInterface<IAccessibleHyperlink>(this);
-  if (!acc) {
-    *aOk = false;
-    return 0;
-  }
-
-  long endOffset;
-  *aOk = SUCCEEDED(acc->get_endIndex(&endOffset));
-  return static_cast<uint32_t>(endOffset);
-}
-
 bool RemoteAccessible::IsLinkValid() {
   RefPtr<IAccessibleHyperlink> acc = QueryInterface<IAccessibleHyperlink>(this);
   if (!acc) {

accessible/mac/GeckoTextMarker.mm

@@ -166,10 +166,7 @@ bool GeckoTextMarker::operator<(const GeckoTextMarker& aPoint) const {
     // We compare its end offset in aPoint.mContainer with aPoint.mOffset.
     Accessible* child = parents1.ElementAt(pos1 - 1);
     MOZ_ASSERT(child->Parent() == aPoint.mContainer);
-    bool unused;
+    uint32_t endOffset = child->EndOffset();
-    uint32_t endOffset = child->IsRemote()
-                             ? child->AsRemote()->EndOffset(&unused)
-                             : child->AsLocal()->EndOffset();
     return endOffset < static_cast<uint32_t>(aPoint.mOffset);
   }
 

accessible/tests/browser/e10s/browser_caching_text.js

@@ -172,6 +172,7 @@ addAccessibleTask(
     is(getAccessibleDOMNodeID(link), "link", "LinkAt 0 is the link");
     is(container.getLinkIndex(link), 0, "getLinkIndex for link is 0");
     is(link.startIndex, 1, "link's startIndex is 1");
+    is(link.endIndex, 2, "link's endIndex is 2");
     is(container.getLinkIndexAtOffset(1), 0, "getLinkIndexAtOffset(1) is 0");
     is(container.getLinkIndexAtOffset(0), -1, "getLinkIndexAtOffset(0) is -1");
   },

accessible/windows/ia2/ia2AccessibleHyperlink.cpp

@@ -137,7 +137,7 @@ ia2AccessibleHyperlink::get_endIndex(long* aIndex) {
 
   *aIndex = 0;
 
-  LocalAccessible* thisObj = LocalAcc();
+  Accessible* thisObj = Acc();
   if (!thisObj) {
     return CO_E_OBJNOTCONNECTED;
   }

accessible/xpcom/xpcAccessibleHyperLink.cpp

@@ -38,20 +38,14 @@ xpcAccessibleHyperLink::GetEndIndex(int32_t* aEndIndex) {
 
   if (!Intl()) return NS_ERROR_FAILURE;
 
-  if (Intl()->IsLocal()) {
-    *aEndIndex = Intl()->AsLocal()->EndOffset();
-  } else {
 #if defined(XP_WIN)
+  if (Intl()->IsRemote() &&
+      !StaticPrefs::accessibility_cache_enabled_AtStartup()) {
     return NS_ERROR_NOT_IMPLEMENTED;
-#else
-    bool isIndexValid = false;
-    uint32_t endOffset = Intl()->AsRemote()->EndOffset(&isIndexValid);
-    if (!isIndexValid) return NS_ERROR_FAILURE;
-
-    *aEndIndex = endOffset;
-#endif
   }
+#endif
 
+  *aEndIndex = static_cast<int32_t>(Intl()->EndOffset());
   return NS_OK;
 }