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

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

+// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#include "config.h"
+
+#include "bindings/core/dart/DartService.h"
+
+#include "bindings/core/dart/DartApplicationLoader.h"
+#include "bindings/core/dart/DartController.h"
+#include "bindings/core/dart/DartDocument.h"
+#include "bindings/core/dart/DartUtilities.h"
+#include "bindings/core/dart/DartWindow.h"
+
+
+namespace blink {
+
+// Dartium VM Service embedder glue script source.
+static const char* kScriptChars = "\n"
+"library vmservice_dartium;\n"
+"\n"
+"import 'dart:isolate';\n"
+"import 'dart:vmservice';\n"
+"\n"
+"\n"
+"// The receive port that service request messages are delivered on.\n"
+"SendPort requestPort;\n"
+"\n"
+"// The native method that is called to post the response back to DevTools.\n"
+"void postResponse(String response, int cookie) native \"VMService_PostResponse\";\n"
+"\n"
+"/// Dartium Service receives messages through the requestPort and posts\n"
+"/// responses via postResponse. It has a single persistent client.\n"
+"class DartiumClient extends Client {\n"
+"  DartiumClient(port, service) : super(service) {\n"
+"    port.listen((message) {\n"
+"      if (message == null) {\n"
+"        return;\n"
+"      }\n"
+"      if (message is! List) {\n"
+"        return;\n"
+"      }\n"
+"      if (message.length != 2) {\n"
+"        return;\n"
+"      }\n"
+"      if (message[0] is! String) {\n"
+"        return;\n"
+"      }\n"
+"      var uri = Uri.parse(message[0]);\n"
+"      var cookie = message[1];\n"
+"      onMessage(cookie, new Message.fromUri(uri));\n"
+"    });\n"
+"  }\n"
+"\n"
+"  void post(var seq, String response) {\n"
+"    postResponse(response, seq);\n"
+"  }\n"
+"\n"
+"  dynamic toJson() {\n"
+"    var map = super.toJson();\n"
+"    map['type'] = 'DartiumClient';\n"
+"  }\n"
+"}\n"
+"\n"
+"\n"
+"vmservice_dartium_main() {\n"
+"  // Get VMService.\n"
+"  var service = new VMService();\n"
+"  var receivePort = new ReceivePort();\n"
+"  requestPort = receivePort.sendPort;\n"
+"  new DartiumClient(receivePort, service);\n"
+"}\n";
+
+
+#define SHUTDOWN_ON_ERROR(handle)                      \
+    if (Dart_IsError(handle)) {                        \
+        m_errorMsg = strdup(Dart_GetError(handle));    \
+        Dart_ExitScope();                              \
+        Dart_ShutdownIsolate();                        \
+        return false;                                  \
+    }
+
+const char* DartService::m_errorMsg = 0;
+Dart_Isolate DartService::m_isolate = 0;
+
+bool DartService::Start(Document* document)
+{
+    if (m_isolate) {
+        // Already started.
+        return true;
+    }
+    ASSERT(!Dart_CurrentIsolate());
+    Dart_Isolate isolate = Dart_GetServiceIsolate(document);
+    if (!isolate) {
+        m_errorMsg = "Could not get service isolate from VM.";
+        return false;
+    }
+    Dart_EnterIsolate(isolate);
+    Dart_EnterScope();
+    Dart_Handle result;
+    Dart_Handle library = LoadScript();
+    SHUTDOWN_ON_ERROR(library);
+    // Expect a library.
+    ASSERT(Dart_IsLibrary(library));
+    library = Dart_RootLibrary();
+    result = Dart_SetNativeResolver(library, NativeResolver, 0);
+    SHUTDOWN_ON_ERROR(result);
+    result = Dart_Invoke(library, Dart_NewStringFromCString("vmservice_dartium_main"), 0, 0);
+    SHUTDOWN_ON_ERROR(result);
+    Dart_ExitScope();
+    Dart_ExitIsolate();
+    m_isolate = isolate;
+    return true;
+}
+
+
+const char* DartService::GetErrorMessage()
+{
+    return m_errorMsg ? m_errorMsg : "No error.";
+}
+
+
+DartServiceRequest::DartServiceRequest(const String& request) : m_request(request)
+{
+}
+
+DartServiceRequest::~DartServiceRequest()
+{
+}
+
+
+// The format of the message is:
+// [request string, address of DartServiceRequest].
+static Dart_Handle MakeServiceRequestMessage(DartServiceRequest* request)
+{
+    intptr_t requestAddress = reinterpret_cast<intptr_t>(request);
+    int64_t requestAddress64 = static_cast<int64_t>(requestAddress);
+    Dart_Handle ALLOW_UNUSED result;
+    Dart_Handle list = Dart_NewList(2);
+    ASSERT(!Dart_IsError(list));
+    Dart_Handle requestHandle = DartUtilities::stringToDartString(request->GetRequestString());
+    ASSERT(!Dart_IsError(requestHandle));
+    Dart_Handle addressHandle = Dart_NewInteger(requestAddress64);
+    ASSERT(!Dart_IsError(addressHandle));
+    result = Dart_ListSetAt(list, 0, requestHandle);
+    ASSERT(!Dart_IsError(result));
+    result = Dart_ListSetAt(list, 1, addressHandle);
+    ASSERT(!Dart_IsError(result));
+    return list;
+}
+
+
+void DartService::MakeServiceRequest(DartServiceRequest* request)
+{
+    ASSERT(m_isolate);
+    // TODO(johnmccutchan): Once the VM service is no longer a DOM isolate,
+    // we must be careful about entering the isolate.
+    DartIsolateScope isolateScope(m_isolate);
+    DartApiScope apiScope;
+    Dart_Handle message = MakeServiceRequestMessage(request);
+    if (Dart_IsError(message)) {
+        return;
+    }
+    Dart_Handle library = Dart_RootLibrary();
+    if (Dart_IsError(library)) {
+        return;
+    }
+    Dart_Handle requestPortFieldName = Dart_NewStringFromCString("requestPort");
+    Dart_Handle requestPort = Dart_GetField(library, requestPortFieldName);
+    if (Dart_IsError(requestPort)) {
+        return;
+    }
+    Dart_Port portId;
+    Dart_Handle result = Dart_SendPortGetId(requestPort, &portId);
+    if (Dart_IsError(result)) {
+        return;
+    }
+    Dart_Post(portId, message);
+}
+
+
+Dart_Handle DartService::LoadScript()
+{
+    Dart_Handle url = Dart_NewStringFromCString("dart:vmservice_dartium");
+    ASSERT(!Dart_IsError(url));
+    intptr_t length = strlen(kScriptChars);
+    Dart_Handle source = Dart_NewStringFromUTF8(reinterpret_cast<const uint8_t*>(kScriptChars), length);
+    ASSERT(!Dart_IsError(source));
+    Dart_Handle library = Dart_LoadScript(url, source, 0, 0);
+    ASSERT(!Dart_IsError(library));
+    Dart_Handle loadingFinalized = Dart_FinalizeLoading(true);
+    if (Dart_IsError(loadingFinalized)) {
+        return loadingFinalized;
+    }
+    return library;
+}
+
+
+static void PostResponse(Dart_NativeArguments args)
+{
+    Dart_Handle ALLOW_UNUSED result;
+    Dart_Handle response = Dart_GetNativeArgument(args, 0);
+    ASSERT(!Dart_IsError(response));
+    Dart_Handle cookie = Dart_GetNativeArgument(args, 1);
+    ASSERT(!Dart_IsError(cookie));
+    int64_t requestAddress64 = 0;
+    result = Dart_IntegerToInt64(cookie, &requestAddress64);
+    ASSERT(!Dart_IsError(result));
+    ASSERT(requestAddress64);
+    intptr_t requestAddress = static_cast<intptr_t>(requestAddress64);
+    ASSERT(requestAddress);
+    DartServiceRequest* request = reinterpret_cast<DartServiceRequest*>(requestAddress);
+    const char* responseString = 0;
+    result = Dart_StringToCString(response, &responseString);
+    ASSERT(!Dart_IsError(result));
+    ASSERT(responseString);
+    request->ResponseReady(responseString);
+}
+
+
+struct VmServiceNativeEntry {
+    const char* name;
+    int numArguments;
+    Dart_NativeFunction function;
+};
+
+
+static VmServiceNativeEntry VmServiceNativeEntries[] = {
+    {"VMService_PostResponse", 2, PostResponse}
+};
+
+
+Dart_NativeFunction DartService::NativeResolver(Dart_Handle name, int numArguments, bool* autoScopeSetup)
+{
+    const char* functionName = 0;
+    Dart_Handle ALLOW_UNUSED result = Dart_StringToCString(name, &functionName);
+    ASSERT(!Dart_IsError(result));
+    ASSERT(functionName);
+    ASSERT(autoScopeSetup);
+    *autoScopeSetup = true;
+    intptr_t n = sizeof(VmServiceNativeEntries) / sizeof(VmServiceNativeEntries[0]);
+    for (intptr_t i = 0; i < n; i++) {
+        VmServiceNativeEntry entry = VmServiceNativeEntries[i];
+        if (!strcmp(functionName, entry.name) && (numArguments == entry.numArguments)) {
+            return entry.function;
+        }
+    }
+    return 0;
+}
+
+}