Add console.log support to gin_shell

This CL adds a basic console module to gin_shell so that we can print to stdout
with a JavaScript program like the following:

define(["console"], function(console) {
  console.log("Hello,", "world");
});

BUG=317398

Review URL: https://codereview.chromium.org/75273007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235940 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 69 insertions, 0 deletions

diff --git a/gin/modules/console.cc b/gin/modules/console.cc
new file mode 100644
index 0000000..6f4afbb
--- /dev/null
+++ b/gin/modules/console.cc
@@ -0,0 +1,49 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "gin/modules/console.h"
+
+#include <iostream>
+
+#include "base/strings/string_util.h"
+#include "gin/arguments.h"
+#include "gin/converter.h"
+#include "gin/per_isolate_data.h"
+#include "gin/wrapper_info.h"
+
+using v8::ObjectTemplate;
+
+namespace gin {
+
+namespace {
+
+void Log(const v8::FunctionCallbackInfo<v8::Value>& info) {
+  Arguments args(info);
+
+  std::vector<std::string> messages;
+  if (!args.GetRemaining(&messages))
+    return args.ThrowTypeError("Expected strings.");
+
+  std::cout << JoinString(messages, ' ') << std::endl;
+}
+
+WrapperInfo g_wrapper_info = {};
+
+}  // namespace
+
+const char Console::kModuleName[] = "console";
+
+v8::Local<ObjectTemplate> Console::GetTemplate(v8::Isolate* isolate) {
+  PerIsolateData* data = PerIsolateData::From(isolate);
+  v8::Local<ObjectTemplate> templ = data->GetObjectTemplate(&g_wrapper_info);
+  if (templ.IsEmpty()) {
+    templ = ObjectTemplate::New();
+    templ->Set(StringToSymbol(isolate, "log"),
+               v8::FunctionTemplate::New(Log));
+    data->SetObjectTemplate(&g_wrapper_info, templ);
+  }
+  return templ;
+}
+
+}  // namespace gin
diff --git a/gin/modules/console.h b/gin/modules/console.h
new file mode 100644
index 0000000..139a6c9
--- /dev/null
+++ b/gin/modules/console.h
@@ -0,0 +1,20 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef GIN_MODULES_CONSOLE_H_
+#define GIN_MODULES_CONSOLE_H_
+
+#include "v8/include/v8.h"
+
+namespace gin {
+
+class Console {
+ public:
+  static const char kModuleName[];
+  static v8::Local<v8::ObjectTemplate> GetTemplate(v8::Isolate* isolate);
+};
+
+}  // namespace gin
+
+#endif  // GIN_MODULES_CONSOLE_H_