Implement ScriptPromise and ScriptFunction

Source/bindings/v8/ScriptPromise.h

 /*
  * 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
@@ skipping 10 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef GCObservation_h
-#define GCObservation_h
+#ifndef ScriptPromise_h
+#define ScriptPromise_h
 
 #include "bindings/v8/ScopedPersistent.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefCounted.h"
+#include "bindings/v8/ScriptFunction.h"
+#include "bindings/v8/V8ScriptRunner.h"
 #include <v8.h>
 
 namespace WebCore {
 
-class GCObservation : public RefCounted<GCObservation> {
+class ScriptPromise {
 public:
-    static PassRefPtr<GCObservation> create(v8::Handle<v8::Value> observedValue) { return adoptRef(new GCObservation(observedValue)); }
-    ~GCObservation() { }
+    explicit ScriptPromise(ScriptValue promise)
+        : m_promise(promise)
+    {
+        ASSERT(!m_promise.hasNoValue());
+    }
 
-    // Caution: It is only feasible to determine whether an object was
-    // "near death"; it may have been kept alive through a weak
-    // handle. After reaching near-death, having been collected is the
-    // common case.
-    bool wasCollected() const { return m_collected; }
-    void setWasCollected();
+    bool then(v8::Handle<v8::Function> function, ScriptValue& result)
+    {
+        if (!m_promise.isObject())
+            return false;
+        v8::Handle<v8::Object> promise = m_promise.v8Value().As<v8::Object>();
+        v8::Handle<v8::Value> then = promise->Get(v8::String::NewSymbol("then"));
+        if (then.IsEmpty() || !then->IsFunction())
+            return false;
+
+        v8::Handle<v8::Value> argv[] = { function };
+        result = V8ScriptRunner::callFunction(then.As<v8::Function>(), getScriptExecutionContext(), promise, WTF_ARRAY_LENGTH(argv), argv);
+        return true;
+    }
 
 private:
-    explicit GCObservation(v8::Handle<v8::Value>);
-
-    ScopedPersistent<v8::Value> m_observed;
-    bool m_collected;
+    ScriptValue m_promise;
 };
 
-}
+} // namespace WebCore
 
-#endif // GCObservation_h
+
+#endif // ScriptPromise_h