WIP don't review: Implement Future

Source/bindings/v8/V8FutureInit.cpp

Index: Source/bindings/v8/V8FutureInit.cpp
diff --git a/Source/bindings/v8/custom/V8CustomSQLStatementErrorCallback.cpp b/Source/bindings/v8/V8FutureInit.cpp
similarity index 51%
copy from Source/bindings/v8/custom/V8CustomSQLStatementErrorCallback.cpp
copy to Source/bindings/v8/V8FutureInit.cpp
index 66d97e217f09100524a05cd718aac2e01ef0d3f1..baa00283653c6c37fca17eefb65bfc7eed2cb54a 100644
--- a/Source/bindings/v8/custom/V8CustomSQLStatementErrorCallback.cpp
+++ b/Source/bindings/v8/V8FutureInit.cpp
@@ -1,10 +1,10 @@
 /*
- * Copyright (c) 2009, 2012 Google Inc. All rights reserved.
- * 
+ * Copyright (C) 2013 Google Inc.  All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ -14,7 +14,7 @@
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -30,48 +30,67 @@
 
 #include "config.h"
 
-#include "V8SQLStatementErrorCallback.h"
+#include "bindings/v8/V8FutureInit.h"
 
-#include "V8SQLError.h"
-#include "V8SQLTransaction.h"
-#include "bindings/v8/V8Callback.h"
-#include "core/dom/ScriptExecutionContext.h"
-#include "wtf/Assertions.h"
+// Include generated files.
+#include "V8Future.h"
+#include "V8FutureResolver.h"
+
+#include "bindings/v8/ScriptController.h"
+#include "bindings/v8/V8Binding.h"
+#include "core/platform/Logging.h"
 
 namespace WebCore {
 
-bool V8SQLStatementErrorCallback::handleEvent(SQLTransaction* transaction, SQLError* error)
+V8FutureInit::V8FutureInit(v8::Handle<v8::Function> callback, ScriptExecutionContext* context)
+    : ActiveDOMCallback(context)
+    , m_callback(callback)
+    , m_world(DOMWrapperWorld::current())
+{
+    // FIXME: Probably NO. Make the Persistent m_callback has weak?
+}
+
+ScriptValue V8FutureInit::call(PassRefPtr<FutureResolver> value, PassRefPtr<Future> future, ScriptExecutionContext*)
 {
     if (!canInvokeCallback())
-        return true;
+        return ScriptValue();
 
     v8::HandleScope handleScope;
 
     v8::Handle<v8::Context> v8Context = toV8Context(scriptExecutionContext(), m_world.get());
     if (v8Context.IsEmpty())
-        return true;
+        return ScriptValue();
 
+    // Enter the context.
     v8::Context::Scope scope(v8Context);
 
-    v8::Handle<v8::Value> transactionHandle = toV8(transaction, v8::Handle<v8::Object>(), v8Context->GetIsolate());
-    v8::Handle<v8::Value> errorHandle = toV8(error, v8::Handle<v8::Object>(), v8Context->GetIsolate());
-    if (transactionHandle.IsEmpty() || errorHandle.IsEmpty()) {
+    // FIXME: Need to New with v8Context's isolate?
+
+    if (m_callback.isEmpty())
+        return ScriptValue();
+
+    v8::Handle<v8::Function> callback = m_callback.get();
+
+    // Call get() to disambiguate toV8 call.
+    v8::Handle<v8::Value> futureHandle = toV8(future.get(), v8::Handle<v8::Object>(), v8Context->GetIsolate());
+    if (!futureHandle->IsObject() || futureHandle.IsEmpty()) {
+        if (!isScriptControllerTerminating())
+            CRASH();
+        return ScriptValue();
+    }
+
+    v8::Handle<v8::Value> valueHandle = toV8(value.get(), v8::Handle<v8::Object>(), v8Context->GetIsolate());
+    if (valueHandle.IsEmpty()) {
         if (!isScriptControllerTerminating())
             CRASH();
-        return true;
+        return ScriptValue();
     }
+    v8::Handle<v8::Value> argv[] = { valueHandle };
 
-    v8::Handle<v8::Value> argv[] = {
-        transactionHandle,
-        errorHandle
-    };
-
-    bool callbackReturnValue = false;
-    // Step 6: If the error callback returns false, then move on to the next
-    // statement, if any, or onto the next overall step otherwise. Otherwise,
-    // the error callback did not return false, or there was no error callback.
-    // Jump to the last step in the overall steps.
-    return invokeCallback(m_callback.get(), 2, argv, callbackReturnValue, scriptExecutionContext()) || callbackReturnValue;
+    v8::TryCatch exceptionCatcher;
+    exceptionCatcher.SetVerbose(true); // ?
+    ScriptController::callFunctionWithInstrumentation(scriptExecutionContext(), callback, v8::Handle<v8::Function>::Cast(futureHandle), 1, argv);
+    return exceptionCatcher.Exception();
 }
 
 } // namespace WebCore