Dart bindings for WebKit

Source/WebCore/bindings/dart/DartCallback.cpp

+/*
+ * Copyright (C) 2006-2011 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 "DartCallback.h"
+
+#include "DartController.h"
+
+namespace WebCore {
+
+DartCallback::DartCallback(Dart_Handle object, Dart_Handle& exception)
+{
+    if (!Dart_IsClosure(object)) {
+        exception = Dart_NewString("Callback must be a function");
+         m_isolate = 0;
+         m_callback = 0;
+         return;
+    }
+    m_isolate = Dart_CurrentIsolate();
+    m_callback = Dart_NewPersistentHandle(object);
+}
+
+DartCallback::~DartCallback()
+{
+    // FIXME: delete the handle when we have proper GC semantics for isolate destruction.
+    // Dart_DeletePersistentHandle(m_callback);
+}
+
+bool DartCallback::handleEventInternal(Dart_Handle* argv, int argc)
+{
+    ASSERT(m_isolate && m_callback);
+
+    ScriptExecutionContext* context = DartUtilities::isolateContext(m_isolate);
+    DartController* dartController = DartController::retrieve(context);
+
+    Dart_Handle result = dartController->callFunction(m_callback, argc, argv);
+    if (Dart_IsError(result)) {
+        DartUtilities::reportProblem(context, result);
+        return false;
+    }
+
+    Dart_Handle exception = 0;
+    bool returnValue = DartUtilities::toBool(result, exception);
+    if (exception)
+        return false;
+    return returnValue;
+}
+
+}