Dart bindings for WebKit

Source/WebCore/bindings/dart/DartClassInfo.cpp

+// Copyright 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 "DartClassInfo.h"
+
+#include "DartDOMWindow.h"
+#include "DartDOMWrapper.h"
+#include "DartIsolateState.h"
+#include "DartUtilities.h"
+#include "PlatformString.h"
+#include "npruntime_impl.h"
+#include <bindings/npruntime.h>
+#include <dart_api.h>
+#include <wtf/HashMap.h>
+#include <wtf/OwnArrayPtr.h>
+#include <wtf/StdLibExtras.h>
+#include <wtf/text/CString.h>
+#include <wtf/text/StringHash.h>
+
+namespace WebCore {
+
+struct ClassInfo {
+    const char* className;
+    const char* classScript;
+    const Dart_NativeEntryResolver resolver;
+
+    ClassInfo(const char* className, const char* classScript, const Dart_NativeEntryResolver resolver)
+        : className(className)
+        , classScript(classScript)
+        , resolver(resolver) { }
+};
+
+typedef Vector<ClassInfo> ClassInfos;
+static ClassInfos& getClassInfos()
+{
+    DEFINE_STATIC_LOCAL(ClassInfos, classInfos, ());
+    return classInfos;
+}
+
+void DartClassInfo::registerClass(const char* className, const char* classScript, const Dart_NativeEntryResolver resolver)
+{
+    getClassInfos().append(ClassInfo(className, classScript, resolver));
+}
+
+static void topLevelWindow(Dart_NativeArguments args)
+{
+    DartApiScope dartApiScope;
+    if (!DartUtilities::isFullDomIsolate(Dart_CurrentIsolate()))
+        Dart_ThrowException(DartUtilities::domDisabledException());
+
+    // Return full DOMWindow implementation (toDartValue(DOMWindow*) always returns secure wrapper).
+    Dart_Handle result = DartDOMWrapper::toDart<DartDOMWindow>(DartUtilities::domWindowForCurrentIsolate());
+    if (result)
+        Dart_SetReturnValue(args, result);
+}
+
+static void npObjectGet(Dart_NativeArguments args)
+{
+    DART_UNIMPLEMENTED();
+}
+
+static NPIdentifier getStringIdentifier(Dart_Handle id)
+{
+    intptr_t length = 0;
+    // FIXME: add return value check.
+    Dart_StringLength(id, &length);
+    char* buffer = new char[length + 1];
+    Dart_StringGet8(id, reinterpret_cast<uint8_t*>(buffer), &length);
+    buffer[length] = '\0';
+    NPIdentifier result = _NPN_GetStringIdentifier(buffer);
+    delete [] buffer;
+    return result;
+}
+
+static void npObjectInvoke(Dart_NativeArguments args)
+{
+    DartApiScope dartApiScope;
+    Dart_Handle exception;
+    {
+        NPObject* npObject = DartDOMWrapper::receiver< NPObject >(args);
+
+        if (!Dart_IsNull(Dart_GetNativeArgument(args, 2))) {
+            exception = DartUtilities::notImplementedException();
+            goto fail;
+        }
+
+        // FIXME: proper support for HTMLAppletElement and HTMLEmbedElement, see v8.
+
+        // FIXME: support argument conversion.
+        int numArgs = 0;
+        OwnArrayPtr<NPVariant> npArgs = adoptArrayPtr(new NPVariant[numArgs]);
+
+        NPVariant result;
+        VOID_TO_NPVARIANT(result);
+
+        bool retval = true;
+        if (npObject->_class->invoke) {
+            NPIdentifier identifier = getStringIdentifier(Dart_GetNativeArgument(args, 1));
+            retval = npObject->_class->invoke(npObject, identifier, npArgs.get(), numArgs, &result);
+        }
+
+        if (!retval) {
+            exception = Dart_NewString("Error calling method on NPObject.");
+            goto fail;
+        }
+
+        // FIXME: support return value conversion.
+
+        return;
+    }
+
+fail:
+    Dart_ThrowException(exception);
+    ASSERT_NOT_REACHED();
+}
+
+namespace DartDOMWindowInternal {
+
+void historyCrossFrameGetter(Dart_NativeArguments);
+
+void locationCrossFrameGetter(Dart_NativeArguments);
+
+}
+
+static Dart_NativeFunction domResolver(Dart_Handle name, int argumentCount)
+{
+    // FIXME: native for DOM helpers require a class on its own.
+    // FIXME: Hash for efficient lookup.
+    Dart_NativeFunction result = 0;
+    const ClassInfos& classInfos = getClassInfos();
+    for (size_t i = 0; i < classInfos.size(); i++) {
+        const ClassInfo& classInfo = classInfos[i];
+        if (classInfo.resolver) {
+            result = classInfo.resolver(name, argumentCount);
+            if (result)
+                return result;
+        }
+    }
+    // Some utility functions.
+    String str = DartUtilities::dartStringToString(name);
+    if (argumentCount == 0 && str == "TopLevel_Window")
+        return topLevelWindow;
+    if (argumentCount == 2 && str == "NPObject_get")
+        return npObjectGet;
+    if (argumentCount == 3 && str == "NPObject_invoke")
+        return npObjectInvoke;
+    if (argumentCount == 1 && str == "DOMWindow_history_cross_frame_Getter")
+        return DartDOMWindowInternal::historyCrossFrameGetter;
+    if (argumentCount == 1 && str == "DOMWindow_location_cross_frame_Getter")
+        return DartDOMWindowInternal::locationCrossFrameGetter;
+    return 0;
+}
+
+void DartClassInfo::registerClasses(Dart_Handle library)
+{
+    const ClassInfos& classInfos = getClassInfos();
+    for (size_t i = 0; i < classInfos.size(); i++)
+        // FIXME: proper management of DOM library.
+        Dart_LoadSource(library, Dart_NewString(classInfos[i].className), Dart_NewString(classInfos[i].classScript));
+    Dart_SetNativeResolver(library, domResolver);
+}
+
+}