WIP don't review: Implement Future

Source/bindings/v8/V8AnyCallback.cpp

+/*
+ * 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
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * 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
+ * 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.
+ */
+
+#include "config.h"
+
+#include "bindings/v8/V8AnyCallback.h"
+
+#include "V8Future.h"
+
+#include "bindings/v8/ScriptController.h"
+#include "bindings/v8/V8Binding.h"
+#include "core/platform/Logging.h"
+
+namespace WebCore {
+
+V8AnyCallback::V8AnyCallback(v8::Handle<v8::Function> callback, ScriptExecutionContext* context)
+    : ActiveDOMCallback(context)
+    , m_callback(callback)
+    , m_world(DOMWrapperWorld::current())
+{
+    // FIXME: Make the Persistent m_callback has weak?
+}
+
+ScriptValue V8AnyCallback::call(const ScriptValue& value, PassRefPtr<Future> future, bool* exceptionThrown)
+{
+    LOG(Network, "V8AnyCallback::call0");
+
+    if (!canInvokeCallback())
+        return ScriptValue();
+
+    LOG(Network, "V8AnyCallback::call1");
+
+    v8::HandleScope handleScope;
+
+    v8::Handle<v8::Context> v8Context = toV8Context(scriptExecutionContext(), m_world.get());
+    if (v8Context.IsEmpty())
+        return ScriptValue();
+
+    LOG(Network, "V8AnyCallback::call2");
+
+    // Enter the context.
+    v8::Context::Scope scope(v8Context);
+
+    // FIXME: Need to New with v8Context's isolate?
+
+    if (m_callback.isEmpty())
+        return ScriptValue();
+
+    LOG(Network, "V8AnyCallback::call3");
+
+    v8::Handle<v8::Function> callback = m_callback.get();
+
+    v8::Handle<v8::Object> thisObject = v8Context->Global();
+    if (future) {
+        v8::Handle<v8::Value> futureHandle = toV8(future.get(), v8::Handle<v8::Object>(), v8Context->GetIsolate());
+        if (!futureHandle->IsObject() || futureHandle.IsEmpty()) {
+            if (!isScriptControllerTerminating())
+                CRASH();
+            return ScriptValue();
+        }
+        thisObject = v8::Handle<v8::Object>::Cast(futureHandle);
+    }
+
+    // FIXME: Need to pass v8Context's isolate?
+    v8::Handle<v8::Value> arg = v8::Undefined();
+    if (!value.hasNoValue())
+        arg = value.v8Value();
+    v8::Handle<v8::Value> argv[] = { arg };
+
+    LOG(Network, "V8AnyCallback::call4");
+
+    v8::TryCatch exceptionCatcher;
+    exceptionCatcher.SetVerbose(true); // ?
+    v8::Handle<v8::Value> result = ScriptController::callFunctionWithInstrumentation(scriptExecutionContext(), callback, thisObject, 1, argv);
+    if (exceptionCatcher.HasCaught()) {
+        *exceptionThrown = true;
+        return exceptionCatcher.Exception();
+    }
+    return result;
+}
+
+} // namespace WebCore