First phase of migration to new indexed property query callbacks.

Eventually indexed property query callbacks will return attributes
(as an integer) or an empty handle if property is not intercepted.

To gradually migrate to this new API, USE_NEW_QUERY_CALLBACK
macro would control if old or new style API is used.

So the migration plan is:

1) introduce new API which should be explictily enabled;
2) switch to new API defining USE_NEW_QUERY_CALLBACK before
include of <v8.h> (that would require changes to client code as well)
3) remove old API from v8
4) remove #define USE_NEW_QUERY_CALLBACK from clients.

BUG=http://code.google.com/p/v8/issues/detail?id=816

Review URL: http://codereview.chromium.org/3101001

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5228 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

include/v8.h

@@ -1824,10 +1824,19 @@ typedef Handle<Value> (*IndexedPropertySetter)(uint32_t index,
 
 /**
  * Returns a non-empty handle if the interceptor intercepts the request.
- * The result is true if the property exists and false otherwise.
+ * The result is true if either a boolean (true if property exists and false
+ * otherwise) or an integer encoding property attributes.
  */
+#ifdef USE_NEW_QUERY_CALLBACKS
+typedef Handle<Integer> (*IndexedPropertyQuery)(uint32_t index,
+                                                const AccessorInfo& info);
+#else
 typedef Handle<Boolean> (*IndexedPropertyQuery)(uint32_t index,
                                                 const AccessorInfo& info);
+#endif
+
+typedef Handle<Value> (*IndexedPropertyQueryImpl)(uint32_t index,
+                                                  const AccessorInfo& info);
 
 /**
  * Returns a non-empty handle if the deleter intercepts the request.
@@ -2045,7 +2054,23 @@ class V8EXPORT FunctionTemplate : public Template {
                                          IndexedPropertyQuery query,
                                          IndexedPropertyDeleter remover,
                                          IndexedPropertyEnumerator enumerator,
-                                         Handle<Value> data);
+                                         Handle<Value> data) {
+    IndexedPropertyQueryImpl casted =
+        reinterpret_cast<IndexedPropertyQueryImpl>(query);
+    SetIndexedInstancePropertyHandlerImpl(getter,
+                                          setter,
+                                          casted,
+                                          remover,
+                                          enumerator,
+                                          data);
+  }
+  void SetIndexedInstancePropertyHandlerImpl(
+      IndexedPropertyGetter getter,
+      IndexedPropertySetter setter,
+      IndexedPropertyQueryImpl query,
+      IndexedPropertyDeleter remover,
+      IndexedPropertyEnumerator enumerator,
+      Handle<Value> data);
   void SetInstanceCallAsFunctionHandler(InvocationCallback callback,
                                         Handle<Value> data);
 
@@ -2144,7 +2169,25 @@ class V8EXPORT ObjectTemplate : public Template {
                                  IndexedPropertyQuery query = 0,
                                  IndexedPropertyDeleter deleter = 0,
                                  IndexedPropertyEnumerator enumerator = 0,
-                                 Handle<Value> data = Handle<Value>());
+                                 Handle<Value> data = Handle<Value>()) {
+    IndexedPropertyQueryImpl casted =
+        reinterpret_cast<IndexedPropertyQueryImpl>(query);
+    SetIndexedPropertyHandlerImpl(getter,
+                                  setter,
+                                  casted,
+                                  deleter,
+                                  enumerator,
+                                  data);
+  }
+ private:
+  void SetIndexedPropertyHandlerImpl(IndexedPropertyGetter getter,
+                                     IndexedPropertySetter setter,
+                                     IndexedPropertyQueryImpl query,
+                                     IndexedPropertyDeleter deleter,
+                                     IndexedPropertyEnumerator enumerator,
+                                     Handle<Value> data);
+ public:
+
   /**
    * Sets the callback to be used when calling instances created from
    * this template as a function.  If no callback is set, instances

src/api.cc

@@ -886,10 +886,10 @@ void FunctionTemplate::SetNamedInstancePropertyHandler(
 }
 
 
-void FunctionTemplate::SetIndexedInstancePropertyHandler(
+void FunctionTemplate::SetIndexedInstancePropertyHandlerImpl(
       IndexedPropertyGetter getter,
       IndexedPropertySetter setter,
-      IndexedPropertyQuery query,
+      IndexedPropertyQueryImpl query,
       IndexedPropertyDeleter remover,
       IndexedPropertyEnumerator enumerator,
       Handle<Value> data) {
@@ -1054,10 +1054,10 @@ void ObjectTemplate::SetAccessCheckCallbacks(
 }
 
 
-void ObjectTemplate::SetIndexedPropertyHandler(
+void ObjectTemplate::SetIndexedPropertyHandlerImpl(
       IndexedPropertyGetter getter,
       IndexedPropertySetter setter,
-      IndexedPropertyQuery query,
+      IndexedPropertyQueryImpl query,
       IndexedPropertyDeleter remover,
       IndexedPropertyEnumerator enumerator,
       Handle<Value> data) {
@@ -1068,12 +1068,12 @@ void ObjectTemplate::SetIndexedPropertyHandler(
   i::FunctionTemplateInfo* constructor =
       i::FunctionTemplateInfo::cast(Utils::OpenHandle(this)->constructor());
   i::Handle<i::FunctionTemplateInfo> cons(constructor);
-  Utils::ToLocal(cons)->SetIndexedInstancePropertyHandler(getter,
-                                                          setter,
-                                                          query,
-                                                          remover,
-                                                          enumerator,
-                                                          data);
+  Utils::ToLocal(cons)->SetIndexedInstancePropertyHandlerImpl(getter,
+                                                              setter,
+                                                              query,
+                                                              remover,
+                                                              enumerator,
+                                                              data);
 }
 
 

src/objects.cc

@@ -5823,16 +5823,24 @@ bool JSObject::HasElementWithInterceptor(JSObject* receiver, uint32_t index) {
   CustomArguments args(interceptor->data(), receiver, this);
   v8::AccessorInfo info(args.end());
   if (!interceptor->query()->IsUndefined()) {
-    v8::IndexedPropertyQuery query =
-        v8::ToCData<v8::IndexedPropertyQuery>(interceptor->query());
+    v8::IndexedPropertyQueryImpl query =
+        v8::ToCData<v8::IndexedPropertyQueryImpl>(interceptor->query());
     LOG(ApiIndexedPropertyAccess("interceptor-indexed-has", this, index));
-    v8::Handle<v8::Boolean> result;
+    v8::Handle<v8::Value> result;
     {
       // Leaving JavaScript.
       VMState state(EXTERNAL);
       result = query(index, info);
     }
-    if (!result.IsEmpty()) return result->IsTrue();
+    if (!result.IsEmpty()) {
+      // IsBoolean check would be removed when transition to new API is over.
+      if (result->IsBoolean()) {
+        return result->IsTrue() ? true : false;
+      } else {
+        ASSERT(result->IsInt32());
+        return true;  // absence of property is signaled by empty handle.
+      }
+    }
   } else if (!interceptor->getter()->IsUndefined()) {
     v8::IndexedPropertyGetter getter =
         v8::ToCData<v8::IndexedPropertyGetter>(interceptor->getter());

test/cctest/test-api.cc

@@ -27,6 +27,8 @@
 
 #include <limits.h>
 
+#define USE_NEW_QUERY_CALLBACKS
+
 #include "v8.h"
 
 #include "api.h"
@@ -1194,12 +1196,12 @@ v8::Handle<Value> CheckThisNamedPropertySetter(Local<String> property,
   return v8::Handle<Value>();
 }
 
-v8::Handle<v8::Boolean> CheckThisIndexedPropertyQuery(
+v8::Handle<v8::Integer> CheckThisIndexedPropertyQuery(
     uint32_t index,
     const AccessorInfo& info) {
   ApiTestFuzzer::Fuzz();
   CHECK(info.This()->Equals(bottom));
-  return v8::Handle<v8::Boolean>();
+  return v8::Handle<v8::Integer>();
 }