Dart bindings for WebKit

Source/WebCore/bindings/dart/DartDOMWrapper.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 "DartDOMWrapper.h"
+
+#include "CSSMutableStyleDeclaration.h"
+#include "DartCSSStyleDeclaration.h"
+#include "DartDOMCoreException.h"
+#include "DartEventException.h"
+#include "DartHTMLElement.h"
+#include "DartNode.h"
+#include "DartRangeException.h"
+#include "DartUtilities.h"
+#include "DartXMLHttpRequestException.h"
+#include "DartXPathException.h"
+#include "HTMLFormControlElement.h"
+#include <stdio.h>
+#include <wtf/text/WTFString.h>
+
+#if ENABLE(SVG)
+#include "DartSVGException.h"
+#endif
+#if ENABLE(XPATH)
+#include "DartXPathException.h"
+#endif
+#if ENABLE(SQL_DATABASE)
+#include "DartSQLException.h"
+#endif
+#if ENABLE(BLOB) || ENABLE(FILE_SYSTEM)
+#include "DartFileException.h"
+#include "DartOperationNotAllowedException.h"
+#endif
+#if ENABLE(INDEXED_DATABASE)
+#include "DartIDBDatabaseException.h"
+#endif
+
+namespace WebCore {
+
+void DartDOMWrapper::derefDOMObject(Dart_Handle wrapper, void* domObject)
+{
+    ASSERT(domObject == readNativePointer(wrapper, kNativeImplementationIndex));
+    DerefObjectFunction derefObjectFunction = reinterpret_cast<DerefObjectFunction>(readNativePointer(wrapper, kDerefObjectFunctionIndex));
+    (*derefObjectFunction)(domObject);
+}
+
+Dart_Handle DartDOMWrapper::instantiateWrapper(const char* className)
+{
+    // FIXME: this all is very ugly, but we're blocked by API here.
+    // In this case we need an API to invoke ctor, or even better,
+    // create an instance without exposing constructor at all.
+    String factoryMethodName = String("_create") + className;
+    Dart_Handle dom = Dart_LookupLibrary(Dart_NewString(DartUtilities::domLibraryName));
+    ASSERT(!Dart_IsError(dom));
+
+    Dart_Handle instance = Dart_InvokeStatic(dom, Dart_NewString(className), DartUtilities::stringToDartString(factoryMethodName), 0, 0);
+    ASSERT(!Dart_IsError(instance));
+    return instance;
+}
+
+bool DartDOMWrapper::instanceOf(const char* dartImplementationClassName, Dart_Handle wrapper, Dart_Handle& exception)
+{
+    // FIXME: Cache classes in the corresponding bindings class. Requires persistent handles.
+    Dart_Handle dom = DartUtilities::domLibraryForCurrentIsolate();
+    Dart_Handle cls = Dart_GetClass(dom, Dart_NewString(dartImplementationClassName));
+    if (Dart_IsError(cls)) {
+        exception = Dart_NewString(Dart_GetError(cls));
+        return false;
+    }
+
+    bool isInstanceOf = false;
+    Dart_Handle result = Dart_ObjectIsType(wrapper, cls, &isInstanceOf);
+    if (Dart_IsError(result)) {
+        exception = Dart_NewString(Dart_GetError(result));
+        return false;
+    }
+    if (!isInstanceOf) {
+        String message = String("Invalid class: expected ") + dartImplementationClassName;
+        exception = DartUtilities::stringToDartString(message);
+        return false;
+    }
+
+    return true;
+}
+
+Dart_Handle DartDOMWrapper::exceptionCodeToDartException(ExceptionCode exceptionCode)
+{
+    ASSERT(exceptionCode > 0);
+
+    ExceptionCodeDescription description(exceptionCode);
+
+    switch (description.type) {
+    case DOMCoreExceptionType:
+        return toDartValue(DOMCoreException::create(description));
+    case RangeExceptionType:
+        return toDartValue(RangeException::create(description));
+    case EventExceptionType:
+        return toDartValue(EventException::create(description));
+    case XMLHttpRequestExceptionType:
+        return toDartValue(XMLHttpRequestException::create(description));
+#if ENABLE(SVG)
+    case SVGExceptionType:
+        return toDartValue(SVGException::create(description));
+#endif
+    case XPathExceptionType:
+        return toDartValue(XPathException::create(description));
+#if ENABLE(SQL_DATABASE)
+    case SQLExceptionType:
+        return toDartValue(SQLException::create(description));
+#endif
+#if ENABLE(BLOB) || ENABLE(FILE_SYSTEM)
+    case FileExceptionType:
+        return toDartValue(FileException::create(description));
+    case OperationNotAllowedExceptionType:
+        return toDartValue(OperationNotAllowedException::create(description));
+#endif
+#if ENABLE(INDEXED_DATABASE)
+    case IDBDatabaseExceptionType:
+        return toDartValue(IDBDatabaseException::create(description));
+#endif
+    }
+
+    ASSERT_NOT_REACHED();
+    return Dart_NewString("Unknown WebCore exception");
+}
+
+Dart_Handle toDartValue(ContainerNode* value)
+{
+    return toDartValue(static_cast<Node*>(value));
+}
+
+Dart_Handle toDartValue(CSSMutableStyleDeclaration* value)
+{
+    return toDartValue(static_cast<CSSStyleDeclaration*>(value));
+}
+
+Dart_Handle toDartValue(HTMLFormControlElement* value)
+{
+    return toDartValue(static_cast<HTMLElement*>(value));
+}
+
+Dart_Handle toDartValue(NPObject* object)
+{
+    // FIXME: put NPObjects into a map as well.
+    return DartDOMWrapper::newWrapper("NPObject", object);
+}
+
+}