WebKit merge 40668:40722 part 1.

third_party/WebKit/WebCore/bindings/v8/custom/V8CustomVoidCallback.cpp

Index: third_party/WebKit/WebCore/bindings/v8/custom/V8CustomVoidCallback.cpp
===================================================================
--- third_party/WebKit/WebCore/bindings/v8/custom/V8CustomVoidCallback.cpp	(revision 0)
+++ third_party/WebKit/WebCore/bindings/v8/custom/V8CustomVoidCallback.cpp	(revision 0)
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2009 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 "V8CustomVoidCallback.h"
+
+#include "Frame.h"
+
+namespace WebCore {
+
+V8CustomVoidCallback::V8CustomVoidCallback(v8::Local<v8::Object> callback, Frame* frame)
+    : m_callback(v8::Persistent<v8::Object>::New(callback))
+    , m_frame(frame)
+{
+}
+
+V8CustomVoidCallback::~V8CustomVoidCallback()
+{
+    m_callback.Dispose();
+}
+
+void V8CustomVoidCallback::handleEvent()
+{
+    v8::HandleScope handleScope;
+
+    v8::Handle<v8::Context> context = V8Proxy::GetContext(m_frame.get());
+    if (context.IsEmpty())
+        return;
+
+    v8::Context::Scope scope(context);
+
+    // Protect the frame until the callback returns.
+    RefPtr<Frame> protector(m_frame);
+
+    bool callbackReturnValue = false;
+    invokeCallback(m_callback, 0, 0, callbackReturnValue);
+}
+
+bool invokeCallback(v8::Persistent<v8::Object> callback, int argc, v8::Handle<v8::Value> argv[], bool& callbackReturnValue)
+{
+    // FIXME: If an exception was thrown by the callback, we should report it
+    v8::TryCatch exceptionCatcher;
+
+    v8::Local<v8::Function> callbackFunction;
+    if (callback->IsFunction()) {
+        callbackFunction = v8::Local<v8::Function>::New(v8::Persistent<v8::Function>::Cast(callback));
+    } else if (callback->IsObject()) {
+        v8::Local<v8::Value> handleEventFunction = callback->Get(v8::String::NewSymbol("handleEvent"));
+        if (handleEventFunction->IsFunction()) {
+            callbackFunction = v8::Local<v8::Function>::Cast(handleEventFunction);
+        }
+    } else
+        return false;
+
+    if (callbackFunction.IsEmpty())
+        return false;
+
+    v8::Handle<v8::Object> thisObject = v8::Context::GetCurrent()->Global();
+
+    V8Proxy* proxy = V8Proxy::retrieve();
+    ASSERT(proxy);
+
+    v8::Handle<v8::Value> result = proxy->CallFunction(callbackFunction, thisObject, argc, argv);
+
+    callbackReturnValue = result.IsEmpty() && result->IsBoolean() && result->BooleanValue();
+
+    return exceptionCatcher.HasCaught();
+}
+
+} // namespace WebCore