Added chrome://translate-internals

chrome/browser/ui/webui/translate_internals/translate_internals_handler.cc

+// Copyright (c) 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 "chrome/browser/ui/webui/translate_internals/translate_internals_handler.h"
+
+#include <map>
+#include <string>
+#include <vector>
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/prefs/pref_service.h"
+#include "base/values.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/translate/translate_prefs.h"
+#include "chrome/common/pref_names.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/browser/web_ui.h"
+
+void TranslateInternalsHandler::RegisterMessages() {
+  web_ui()->RegisterMessageCallback("requestInfo", base::Bind(
+      &TranslateInternalsHandler::OnRequestInfo, base::Unretained(this)));
+}
+
+void TranslateInternalsHandler::OnRequestInfo(const base::ListValue* /*args*/) {
+  content::WebContents* web_contents = web_ui()->GetWebContents();
+  Profile* profile =
+      Profile::FromBrowserContext(web_contents->GetBrowserContext());
+  PrefService* prefs = profile->GetOriginalProfile()->GetPrefs();
+
+  base::DictionaryValue dict;
+
+  static const char* keys[] = {
+    prefs::kEnableTranslate,
+    TranslatePrefs::kPrefTranslateLanguageBlacklist,
+    TranslatePrefs::kPrefTranslateSiteBlacklist,
+    TranslatePrefs::kPrefTranslateWhitelists,
+    TranslatePrefs::kPrefTranslateDeniedCount,
+    TranslatePrefs::kPrefTranslateAcceptedCount,
+  };
+
+  scoped_ptr<base::DictionaryValue> pref_values(prefs->GetPreferenceValues());

[Evan Stade, 2013/04/12 16:02:25]

why copy into a dict? What's wrong with GetPreference()?

[hajimehoshi, 2013/04/15 04:01:49]

Done.

+  for (unsigned i = 0; i < arraysize(keys); ++i) {
+    const char* key = keys[i];
+    const base::Value* value;
+    if (pref_values->Get(key, &value)) {
+      base::Value* copied_value = value->DeepCopy();
+      // The ownership of |copied_value| will be passed to |dict|.

[Evan Stade, 2013/04/12 16:02:25]

instead of relying on a comment, you can write code that documents itself:

scoped_ptr<base::Value> copied_value(value->DeepCopy());
dict.Set(key, copied_value.release());

Or just

dict.Set(key, value->DeepCopy());

which I happen to think is self-evident enough.

[hajimehoshi, 2013/04/15 04:01:49]

Done.

+      dict.Set(key, copied_value);
+    }
+  }
+
+  SendMessage("prefsUpdated", dict);
+}
+
+void TranslateInternalsHandler::SendMessage(const std::string& message,
+                                            const base::Value& value) {
+  const char func[] = "cr.translateInternals.messageHandler";
+  scoped_ptr<base::Value> message_data(base::Value::CreateStringValue(message));

[Evan Stade, 2013/04/12 16:02:25]

CreateStringValue is deprecated.

[hajimehoshi, 2013/04/15 04:01:49]

Done.

+  web_ui()->CallJavascriptFunction(func, *message_data, value);
+}