Import Dart bindings as of Blink r188698. This merely copies the files over and does not attach any…

sky/engine/bindings-dart/core/dart/V8Converter.cpp

+/*
+ * Copyright (C) 2012 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/core/dart/V8Converter.h"
+
+#include "bindings/core/dart/DartBlob.h"
+#include "bindings/core/dart/DartDOMStringList.h"
+#include "bindings/core/dart/DartEvent.h"
+#include "bindings/core/dart/DartImageData.h"
+#include "bindings/core/dart/DartNode.h"
+#include "bindings/core/dart/DartWindow.h"
+#include "bindings/core/v8/V8Blob.h"
+#include "bindings/core/v8/V8DOMStringList.h"
+#include "bindings/core/v8/V8Event.h"
+#include "bindings/core/v8/V8ImageData.h"
+#include "bindings/core/v8/V8Node.h"
+#include "bindings/core/v8/V8Window.h"
+#include "bindings/core/dart/DartUtilities.h"
+#include "bindings/modules/dart/DartIDBCursor.h"
+#include "bindings/modules/dart/DartIDBCursorWithValue.h"
+#include "bindings/modules/dart/DartIDBDatabase.h"
+#include "bindings/modules/dart/DartIDBFactory.h"
+#include "bindings/modules/dart/DartIDBKeyRange.h"
+#include "bindings/modules/v8/V8IDBCursor.h"
+#include "bindings/modules/v8/V8IDBCursorWithValue.h"
+#include "bindings/modules/v8/V8IDBDatabase.h"
+#include "bindings/modules/v8/V8IDBFactory.h"
+#include "bindings/modules/v8/V8IDBKeyRange.h"
+#include "bindings/core/v8/custom/V8ArrayBufferViewCustom.h"
+#include "bindings/core/v8/custom/V8DataViewCustom.h"
+#include "bindings/core/v8/custom/V8Float32ArrayCustom.h"
+#include "bindings/core/v8/custom/V8Float64ArrayCustom.h"
+#include "bindings/core/v8/custom/V8Int16ArrayCustom.h"
+#include "bindings/core/v8/custom/V8Int32ArrayCustom.h"
+#include "bindings/core/v8/custom/V8Int8ArrayCustom.h"
+#include "bindings/core/v8/custom/V8TypedArrayCustom.h"
+#include "bindings/core/v8/custom/V8Uint16ArrayCustom.h"
+#include "bindings/core/v8/custom/V8Uint32ArrayCustom.h"
+#include "bindings/core/v8/custom/V8Uint8ArrayCustom.h"
+#include "bindings/core/v8/custom/V8Uint8ClampedArrayCustom.h"
+
+#include "wtf/Vector.h"
+
+#include <utility>
+
+namespace blink {
+
+class DartToV8Map {
+public:
+    DartToV8Map()
+        : m_list()
+    {
+    }
+
+    v8::Handle<v8::Value> get(Dart_Handle key)
+    {
+        for (size_t i = 0; i < m_list.size(); ++i) {
+            if (Dart_IdentityEquals(key, m_list[i].first))
+                return m_list[i].second;
+        }
+        return v8::Handle<v8::Value>();
+    }
+
+    v8::Handle<v8::Value> put(Dart_Handle key, v8::Handle<v8::Value> value)
+    {
+        ASSERT(!value.IsEmpty());
+        ASSERT(get(key).IsEmpty());
+        m_list.append(std::make_pair(key, value));
+        return value;
+    }
+
+private:
+    Vector< std::pair< Dart_Handle, v8::Handle<v8::Value> > > m_list;
+};
+
+class V8ToDartMap {
+public:
+    V8ToDartMap()
+        : m_list()
+    {
+    }
+
+    Dart_Handle get(v8::Handle<v8::Value> key)
+    {
+        for (size_t i = 0; i < m_list.size(); ++i) {
+            if (m_list[i].first == key)
+                return m_list[i].second;
+        }
+        return 0;
+    }
+
+    Dart_Handle put(v8::Handle<v8::Value> key, Dart_Handle value)
+    {
+        ASSERT(!get(key));
+        m_list.append(std::make_pair(key, value));
+        return value;
+    }
+
+private:
+    Vector< std::pair<v8::Handle<v8::Value> , Dart_Handle> > m_list;
+};
+
+v8::Handle<v8::Value> V8Converter::toV8IfPrimitive(DartDOMData* domData, Dart_Handle value, Dart_Handle& exception)
+{
+    if (Dart_IsNull(value))
+        return v8::Null(v8::Isolate::GetCurrent());
+    if (Dart_IsString(value))
+        return stringToV8(value);
+    if (Dart_IsBoolean(value))
+        return booleanToV8(value);
+    if (Dart_IsNumber(value))
+        return numberToV8(value, exception);
+    if (DartUtilities::isDateTime(domData, value))
+        return dateToV8(value, exception);
+
+    return v8::Handle<v8::Value>();
+}
+
+v8::Handle<v8::Value> V8Converter::toV8IfBrowserNative(DartDOMData* domData, Dart_Handle value, Dart_Handle& exception)
+{
+    if (Dart_IsByteBuffer(value)) {
+        Dart_Handle data = Dart_GetDataFromByteBuffer(value);
+        return arrayBufferToV8(data, exception);
+    }
+    if (Dart_IsTypedData(value))
+        return arrayBufferToV8(value, exception);
+    if (DartDOMWrapper::subtypeOf(value, DartBlob::dartClassId))
+        return blobToV8(value, exception);
+    if (DartDOMWrapper::subtypeOf(value, DartImageData::dartClassId))
+        return imageDataToV8(value, exception);
+    if (DartDOMWrapper::subtypeOf(value, DartIDBKeyRange::dartClassId))
+        return idbKeyRangeToV8(value, exception);
+    if (DartDOMWrapper::subtypeOf(value, DartDOMStringList::dartClassId))
+        return domStringListToV8(value, exception);
+    if (DartDOMWrapper::subtypeOf(value, DartNode::dartClassId))
+        return nodeToV8(value, exception);
+    if (DartDOMWrapper::subtypeOf(value, DartEvent::dartClassId))
+        return eventToV8(value, exception);
+    if (DartDOMWrapper::subtypeOf(value, DartWindow::dartClassId))
+        return windowToV8(value, exception);
+
+    return v8::Handle<v8::Value>();
+}
+
+v8::Handle<v8::Value> V8Converter::toV8(Dart_Handle value, DartToV8Map& map, Dart_Handle& exception)
+{
+    v8::Handle<v8::Value> result = map.get(value);
+    if (!result.IsEmpty())
+        return result;
+
+    DartDOMData* domData = DartDOMData::current();
+
+    result = toV8IfPrimitive(domData, value, exception);
+    if (!result.IsEmpty())
+        return result;
+
+    // ArrayBuffer{,View} checks in toV8IfBrowserNative must go before IsList
+    // check as they implement list.
+    result = toV8IfBrowserNative(domData, value, exception);
+    if (!result.IsEmpty()) {
+        map.put(value, result);
+        return result;
+    }
+
+    if (Dart_IsList(value))
+        return listToV8(value, map, exception);
+
+    bool isMap = DartUtilities::dartToBool(DartUtilities::invokeUtilsMethod("isMap", 1, &value), exception);
+    ASSERT(!exception);
+    if (isMap)
+        return mapToV8(value, map, exception);
+
+    exception = Dart_NewStringFromCString("unsupported object type for conversion");
+    return v8::Handle<v8::Value>();
+}
+
+v8::Handle<v8::Value> V8Converter::toV8(Dart_Handle value, Dart_Handle& exception)
+{
+    DartToV8Map map;
+    return toV8(value, map, exception);
+}
+
+Dart_Handle V8Converter::toDartIfPrimitive(v8::Handle<v8::Value> value)
+{
+    if (value->IsUndefined())
+        return Dart_Null();
+    if (value->IsNull())
+        return Dart_Null();
+    if (value->IsString())
+        return stringToDart(value);
+    if (value->IsNumber())
+        return DartUtilities::numberToDart(value->NumberValue());
+    if (value->IsBoolean())
+        return Dart_NewBoolean(value->BooleanValue());
+    if (value->IsDate())
+        return dateToDart(value);
+    return 0;
+}
+
+/**
+ * Convert a subset of types that are backed by browser native objects.
+ * These are types that can be passed transparently between Dart and JS
+ * with the dart:js interop library.
+ */
+Dart_Handle V8Converter::toDartIfBrowserNative(v8::Handle<v8::Object> object, v8::Isolate* isolate, Dart_Handle& exception)
+{
+    if (V8ArrayBuffer::hasInstance(object, isolate))
+        return arrayBufferToDart(object, exception);
+    if (V8ArrayBufferView::hasInstance(object, isolate))
+        return arrayBufferViewToDart(object, exception);
+    if (V8Blob::hasInstance(object, isolate))
+        return blobToDart(object, exception);
+    if (V8DOMStringList::hasInstance(object, isolate))
+        return domStringListToDart(object, exception);
+    if (V8ImageData::hasInstance(object, isolate))
+        return imageDataToDart(object, exception);
+    if (V8IDBKeyRange::hasInstance(object, isolate))
+        return idbKeyRangeToDart(object, exception);
+    if (V8IDBDatabase::hasInstance(object, isolate))
+        return idbDatabaseToDart(object, exception);
+    if (V8IDBFactory::hasInstance(object, isolate))
+        return idbFactoryToDart(object, exception);
+    if (V8IDBCursorWithValue::hasInstance(object, isolate))
+        return idbCursorWithValueToDart(object, exception);
+    if (V8IDBCursor::hasInstance(object, isolate))
+        return idbCursorToDart(object, exception);
+    if (V8Node::hasInstance(object, isolate)) {
+        // FIXME(jacobr): there has to be a faster way to perform this check.
+        if (!object->CreationContext()->Global()->StrictEquals(DartUtilities::currentV8Context()->Global())) {
+            // The window is from a different context so do not convert.
+            return 0;
+        }
+        return nodeToDart(object);
+    }
+    if (V8Event::hasInstance(object, isolate)) {
+        // FIXME(jacobr): there has to be a faster way to perform this check.
+        if (!object->CreationContext()->Global()->StrictEquals(DartUtilities::currentV8Context()->Global())) {
+            // The window is from a different context so do not convert.
+            return 0;
+        }
+        return eventToDart(object);
+    }
+
+    v8::Handle<v8::Object> window = object->FindInstanceInPrototypeChain(V8Window::domTemplate(isolate));
+    if (!window.IsEmpty()) {
+        // FIXME(jacobr): there has to be a faster way to perform this check.
+        if (!object->CreationContext()->Global()->StrictEquals(DartUtilities::currentV8Context()->Global())) {
+            // The window is from a different context so do not convert.
+            return 0;
+        }
+        return windowToDart(window);
+    }
+    return 0;
+}
+
+Dart_Handle V8Converter::toDart(v8::Handle<v8::Value> value, V8ToDartMap& map, Dart_Handle& exception)
+{
+    Dart_Handle result = map.get(value);
+    if (result)
+        return result;
+
+    result = toDartIfPrimitive(value);
+    if (result)
+        return result;
+
+    if (value->IsArray())
+        return listToDart(value.As<v8::Array>(), map, exception);
+    if (value->IsObject()) {
+        v8::Handle<v8::Object> object = value.As<v8::Object>();
+        v8::Isolate* isolate = object->CreationContext()->GetIsolate();
+
+        result = toDartIfBrowserNative(object, isolate, exception);
+        if (result) {
+            map.put(object, result);
+            return result;
+        }
+        return mapToDart(object, map, exception);
+    }
+
+    // FIXME: support other types.
+    exception = Dart_NewStringFromCString("unsupported object type for conversion");
+    return 0;
+}
+
+Dart_Handle V8Converter::toDart(v8::Handle<v8::Value> value, Dart_Handle& exception)
+{
+    V8ToDartMap map;
+    return toDart(value, map, exception);
+}
+
+v8::Handle<v8::String> V8Converter::stringToV8(Dart_Handle value)
+{
+    ASSERT(Dart_IsString(value));
+    uint8_t* data = 0;
+    intptr_t length = -1;
+    Dart_Handle ALLOW_UNUSED result = Dart_StringToUTF8(value, &data, &length);
+    ASSERT(!Dart_IsError(result));
+    return v8::String::NewFromUtf8(
+        v8::Isolate::GetCurrent(), reinterpret_cast<const char*>(data),
+        v8::String::kNormalString, length);
+}
+
+Dart_Handle V8Converter::stringToDart(v8::Handle<v8::Value> value)
+{
+    ASSERT(value->IsString());
+    v8::String::Utf8Value stringValue(value);
+    const char* data = *stringValue;
+    return Dart_NewStringFromUTF8(reinterpret_cast<const uint8_t*>(data), stringValue.length());
+}
+
+v8::Handle<v8::Value> V8Converter::nodeToV8(Dart_Handle value, Dart_Handle& exception)
+{
+    Node* node = DartNode::toNative(value, exception);
+    ASSERT(!exception);
+    if (exception)
+        return v8::Handle<v8::Value>();
+    ASSERT(node);
+
+    V8ScriptState* state = DartUtilities::v8ScriptStateForCurrentIsolate();
+    return blink::toV8(node, state->context()->Global(), state->isolate());
+}
+
+Dart_Handle V8Converter::nodeToDart(v8::Handle<v8::Value> value)
+{
+    ASSERT(value->IsObject());
+
+    v8::Handle<v8::Object> object = value.As<v8::Object>();
+    Node* node = V8Node::toNative(object);
+    ASSERT(node);
+    return DartNode::toDart(node);
+}
+
+v8::Handle<v8::Value> V8Converter::eventToV8(Dart_Handle value, Dart_Handle& exception)
+{
+    Event* event = DartEvent::toNative(value, exception);
+    ASSERT(!exception);
+    if (exception)
+        return v8::Handle<v8::Value>();
+    ASSERT(event);
+    V8ScriptState* state = DartUtilities::v8ScriptStateForCurrentIsolate();
+    return blink::toV8(event, state->context()->Global(), state->isolate());
+}
+
+Dart_Handle V8Converter::eventToDart(v8::Handle<v8::Value> value)
+{
+    ASSERT(value->IsObject());
+
+    v8::Handle<v8::Object> object = value.As<v8::Object>();
+    Event* event = V8Event::toNative(object);
+    ASSERT(event);
+    return DartEvent::toDart(event);
+}
+
+v8::Handle<v8::Value> V8Converter::windowToV8(Dart_Handle value, Dart_Handle& exception)
+{
+    LocalDOMWindow* window = DartWindow::toNative(value, exception);
+    ASSERT(!exception);
+    if (exception)
+        return v8::Handle<v8::Value>();
+    ASSERT(window);
+    V8ScriptState* state = DartUtilities::v8ScriptStateForCurrentIsolate();
+    return blink::toV8(window, state->context()->Global(), state->isolate());
+}
+
+Dart_Handle V8Converter::windowToDart(v8::Handle<v8::Value> value)
+{
+    ASSERT(value->IsObject());
+
+    v8::Handle<v8::Object> object = value.As<v8::Object>();
+    LocalDOMWindow* window = V8Window::toNative(object);
+    ASSERT(window);
+    return DartWindow::toDart(window);
+}
+
+v8::Handle<v8::Value> V8Converter::booleanToV8(Dart_Handle value)
+{
+    ASSERT(Dart_IsBoolean(value));
+    bool booleanValue;
+    Dart_Handle ALLOW_UNUSED result = Dart_BooleanValue(value, &booleanValue);
+    ASSERT(!Dart_IsError(result));
+    return v8::Boolean::New(v8::Isolate::GetCurrent(), booleanValue);
+}
+
+v8::Handle<v8::Value> V8Converter::numberToV8(Dart_Handle value)
+{
+    Dart_Handle exception = 0;
+    v8::Handle<v8::Value> result = numberToV8(value, exception);
+    ASSERT(!exception);
+    return result;
+}
+
+v8::Handle<v8::Value> V8Converter::numberToV8(Dart_Handle value, Dart_Handle& exception)
+{
+    ASSERT(Dart_IsNumber(value));
+
+    double asDouble = DartUtilities::dartToDouble(value, exception);
+    if (exception)
+        return v8::Undefined(v8::Isolate::GetCurrent());
+    return v8::Number::New(v8::Isolate::GetCurrent(), asDouble);
+}
+
+v8::Handle<v8::Value> V8Converter::listToV8(Dart_Handle value)
+{
+    DartToV8Map map;
+    Dart_Handle exception = 0;
+    v8::Handle<v8::Value> result = listToV8(value, map, exception);
+    ASSERT(!exception);
+    return result;
+}
+
+v8::Handle<v8::Value> V8Converter::listToV8(Dart_Handle value, DartToV8Map& map, Dart_Handle& exception)
+{
+    ASSERT(Dart_IsList(value));
+
+    intptr_t length = 0;
+    Dart_Handle result = Dart_ListLength(value, &length);
+    if (!DartUtilities::checkResult(result, exception))
+        return v8::Handle<v8::Value>();
+
+    v8::Local<v8::Array> array = v8::Array::New(v8::Isolate::GetCurrent(), length);
+    map.put(value, array);
+
+    for (intptr_t i = 0; i < length; ++i) {
+        result = Dart_ListGetAt(value, i);
+        if (!DartUtilities::checkResult(result, exception))
+            return v8::Handle<v8::Value>();
+        v8::Handle<v8::Value> v8value = toV8(result, map, exception);
+        if (exception)
+            return v8::Handle<v8::Value>();
+        array->Set(i, v8value);
+    }
+
+    return array;
+}
+
+v8::Handle<v8::Value> V8Converter::dateToV8(Dart_Handle value)
+{
+    Dart_Handle exception = 0;
+    v8::Handle<v8::Value> result = dateToV8(value, exception);
+    ASSERT(!exception);
+    return result;
+}
+
+v8::Handle<v8::Value> V8Converter::dateToV8(Dart_Handle value, Dart_Handle& exception)
+{
+    ASSERT(DartUtilities::isDateTime(DartDOMData::current(), value));
+
+    Dart_Handle asDouble = DartUtilities::invokeUtilsMethod("dateTimeToDouble", 1, &value);
+
+    if (!DartUtilities::checkResult(asDouble, exception))
+        return v8::Handle<v8::Value>();
+
+    double doubleValue = DartUtilities::dartToDouble(asDouble, exception);
+
+    return v8::Date::New(v8::Isolate::GetCurrent(), doubleValue);
+}
+
+Dart_Handle V8Converter::dateToDart(v8::Handle<v8::Value> value)
+{
+    ASSERT(value->IsDate());
+    return DartUtilities::dateToDart(value->NumberValue());
+}
+
+Dart_Handle V8Converter::blobToDart(v8::Handle<v8::Object> object, Dart_Handle& exception)
+{
+    return DartBlob::toDart(V8Blob::toNative(object));
+}
+
+v8::Handle<v8::Value> V8Converter::blobToV8(Dart_Handle handle, Dart_Handle& exception)
+{
+    Blob* blob = DartBlob::toNative(handle, exception);
+    if (exception)
+        return v8::Handle<v8::Value>();
+
+    V8ScriptState* state = DartUtilities::v8ScriptStateForCurrentIsolate();
+    return blink::toV8(blob, state->context()->Global(), state->isolate());
+}
+
+Dart_Handle V8Converter::imageDataToDart(v8::Handle<v8::Object> object, Dart_Handle& exception)
+{
+    return DartImageData::toDart(V8ImageData::toNative(object));
+}
+
+v8::Handle<v8::Value> V8Converter::imageDataToV8(Dart_Handle handle, Dart_Handle& exception)
+{
+    ImageData* imageData = DartImageData::toNative(handle, exception);
+    if (exception)
+        return v8::Handle<v8::Value>();
+
+    V8ScriptState* state = DartUtilities::v8ScriptStateForCurrentIsolate();
+    return blink::toV8(imageData, state->context()->Global(), state->isolate());
+}
+
+Dart_Handle V8Converter::idbKeyRangeToDart(v8::Handle<v8::Object> object, Dart_Handle& exception)
+{
+    return DartIDBKeyRange::toDart(V8IDBKeyRange::toNative(object));
+}
+
+Dart_Handle V8Converter::domStringListToDart(v8::Handle<v8::Object> object, Dart_Handle& exception)
+{
+    return DartDOMStringList::toDart(V8DOMStringList::toNative(object));
+}
+
+Dart_Handle V8Converter::idbDatabaseToDart(v8::Handle<v8::Object> object, Dart_Handle& exception)
+{
+    return DartIDBDatabase::toDart(V8IDBDatabase::toNative(object));
+}
+
+Dart_Handle V8Converter::idbFactoryToDart(v8::Handle<v8::Object> object, Dart_Handle& exception)
+{
+    return DartIDBFactory::toDart(V8IDBFactory::toNative(object));
+}
+
+Dart_Handle V8Converter::idbCursorToDart(v8::Handle<v8::Object> object, Dart_Handle& exception)
+{
+    return DartIDBCursor::toDart(V8IDBCursor::toNative(object));
+}
+
+Dart_Handle V8Converter::idbCursorWithValueToDart(v8::Handle<v8::Object> object, Dart_Handle& exception)
+{
+    return DartIDBCursorWithValue::toDart(V8IDBCursorWithValue::toNative(object));
+}
+
+v8::Handle<v8::Value> V8Converter::idbKeyRangeToV8(Dart_Handle handle, Dart_Handle& exception)
+{
+    IDBKeyRange* keyRange = DartIDBKeyRange::toNative(handle, exception);
+    if (exception)
+        return v8::Handle<v8::Value>();
+
+    V8ScriptState* state = DartUtilities::v8ScriptStateForCurrentIsolate();
+    return blink::toV8(keyRange, state->context()->Global(), state->isolate());
+}
+
+v8::Handle<v8::Value> V8Converter::domStringListToV8(Dart_Handle handle, Dart_Handle& exception)
+{
+    DOMStringList* list = DartDOMStringList::toNative(handle, exception);
+    if (exception)
+        return v8::Handle<v8::Value>();
+
+    V8ScriptState* state = DartUtilities::v8ScriptStateForCurrentIsolate();
+    return blink::toV8(list, state->context()->Global(), state->isolate());
+}
+
+Dart_Handle V8Converter::listToDart(v8::Handle<v8::Array> value, V8ToDartMap& map, Dart_Handle& exception)
+{
+    ASSERT(value->IsArray());
+
+    uint32_t length = value->Length();
+
+    Dart_Handle list = Dart_NewList(length);
+    ASSERT(!Dart_IsError(list));
+    map.put(value, list);
+
+    for (uint32_t i = 0; i < length; ++i) {
+        Dart_Handle result = toDart(value->Get(i), map, exception);
+        if (exception)
+            return 0;
+        if (!DartUtilities::checkResult(result, exception))
+            return 0;
+        result = Dart_ListSetAt(list, i, result);
+        if (!DartUtilities::checkResult(result, exception))
+            return 0;
+    }
+
+    return list;
+}
+
+v8::Handle<v8::Value> V8Converter::mapToV8(Dart_Handle value, DartToV8Map& map, Dart_Handle& exception)
+{
+    Dart_Handle asList = DartUtilities::invokeUtilsMethod("convertMapToList", 1, &value);
+    if (!DartUtilities::checkResult(asList, exception))
+        return v8::Handle<v8::Value>();
+    ASSERT(Dart_IsList(asList));
+
+    // Now we have a list [key, value, key, value, ....], create a v8 object and set necesary
+    // properties on it.
+    v8::Handle<v8::Object> object = v8::Object::New(v8::Isolate::GetCurrent());
+    map.put(value, object);
+
+    // We converted to internal Dart list, methods shouldn't throw exceptions now.
+    intptr_t length = 0;
+    Dart_Handle ALLOW_UNUSED result = Dart_ListLength(asList, &length);
+    ASSERT(!Dart_IsError(result));
+    ASSERT(!(length % 2));
+    for (intptr_t i = 0; i < length; i += 2) {
+        v8::Handle<v8::Value> key = toV8(Dart_ListGetAt(asList, i), map, exception);
+        if (exception)
+            return v8::Handle<v8::Value>();
+        v8::Handle<v8::Value> value = toV8(Dart_ListGetAt(asList, i + 1), map, exception);
+        if (exception)
+            return v8::Handle<v8::Value>();
+
+        object->Set(key, value);
+    }
+
+    return object;
+}
+
+Dart_Handle V8Converter::mapToDart(v8::Handle<v8::Object> object, V8ToDartMap& map, Dart_Handle& exception)
+{
+    v8::Handle<v8::Array> ownPropertyNames = object->GetOwnPropertyNames();
+    uint32_t ownPropertiesCount = ownPropertyNames->Length();
+
+    Dart_Handle result = DartUtilities::invokeUtilsMethod("createMap", 0, 0);
+    ASSERT(!Dart_IsError(result));
+    map.put(object, result);
+
+    Dart_Handle asList = Dart_NewList(ownPropertiesCount * 2);
+    ASSERT(!Dart_IsError(asList));
+
+    for (uint32_t i = 0; i < ownPropertiesCount; i++) {
+        v8::Handle<v8::Value> v8key = ownPropertyNames->Get(i);
+
+        Dart_Handle key = toDart(v8key, map, exception);
+        if (exception)
+            return 0;
+        Dart_ListSetAt(asList, 2 * i, key);
+
+        Dart_Handle value = toDart(object->Get(v8key), map, exception);
+        if (exception)
+            return 0;
+        Dart_ListSetAt(asList, 2 * i + 1, value);
+    }
+
+    Dart_Handle args[2] = { result, asList };
+    DartUtilities::invokeUtilsMethod("populateMap", 2, args);
+    return result;
+}
+
+v8::Handle<v8::Value> V8Converter::arrayBufferToV8(Dart_Handle value, Dart_Handle& exception)
+{
+    V8ScriptState* state = DartUtilities::v8ScriptStateForCurrentIsolate();
+    return blink::toV8(DartUtilities::dartToExternalizedArrayBuffer(value, exception).get(), state->context()->Global(), state->isolate());
+}
+
+Dart_Handle V8Converter::arrayBufferToDart(v8::Handle<v8::Object> object, Dart_Handle& exception)
+{
+    return DartUtilities::arrayBufferToDart(V8ArrayBuffer::toNative(object));
+}
+
+v8::Handle<v8::Value> V8Converter::arrayBufferViewToV8(Dart_Handle value, Dart_Handle& exception)
+{
+    RefPtr<ArrayBufferView> view = DartUtilities::dartToExternalizedArrayBufferView(value, exception);
+    V8ScriptState* state = DartUtilities::v8ScriptStateForCurrentIsolate();
+
+    switch (view->type()) {
+    case ArrayBufferView::TypeInt8:
+        return blink::toV8(static_cast<Int8Array*>(view.get()), state->context()->Global(), state->isolate());
+    case ArrayBufferView::TypeUint8:
+        return blink::toV8(static_cast<Uint8Array*>(view.get()), state->context()->Global(), state->isolate());
+    case ArrayBufferView::TypeUint8Clamped:
+        return blink::toV8(static_cast<Uint8ClampedArray*>(view.get()), state->context()->Global(), state->isolate());
+    case ArrayBufferView::TypeInt16:
+        return blink::toV8(static_cast<Int16Array*>(view.get()), state->context()->Global(), state->isolate());
+    case ArrayBufferView::TypeUint16:
+        return blink::toV8(static_cast<Uint16Array*>(view.get()), state->context()->Global(), state->isolate());
+    case ArrayBufferView::TypeInt32:
+        return blink::toV8(static_cast<Int32Array*>(view.get()), state->context()->Global(), state->isolate());
+    case ArrayBufferView::TypeUint32:
+        return blink::toV8(static_cast<Uint32Array*>(view.get()), state->context()->Global(), state->isolate());
+    case ArrayBufferView::TypeFloat32:
+        return blink::toV8(static_cast<Float32Array*>(view.get()), state->context()->Global(), state->isolate());
+    case ArrayBufferView::TypeFloat64:
+        return blink::toV8(static_cast<Float64Array*>(view.get()), state->context()->Global(), state->isolate());
+    case ArrayBufferView::TypeDataView:
+        return blink::toV8(static_cast<DataView*>(view.get()), state->context()->Global(), state->isolate());
+    default:
+        ASSERT_NOT_REACHED();
+        return v8::Handle<v8::Value>();
+    }
+}
+
+Dart_Handle V8Converter::arrayBufferViewToDart(v8::Handle<v8::Object> object, Dart_Handle& exception)
+{
+    RefPtr<ArrayBufferView> view = V8ArrayBufferView::toNative(object);
+    return DartUtilities::arrayBufferViewToDart(view.get());
+}
+
+} // namespace blink