Refactor the about:version code out of about_ui.

chrome/browser/ui/webui/version_ui.cc

+// Copyright (c) 2012 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/version_ui.h"
+
+#include "base/command_line.h"
+#include "base/file_util.h"
+#include "base/metrics/field_trial.h"
+#include "base/string_split.h"
+#include "base/utf_string_conversions.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/webui/chrome_url_data_manager.h"
+#include "chrome/browser/ui/webui/chrome_web_ui_data_source.h"
+#include "chrome/browser/plugin_prefs.h"
+#include "chrome/common/chrome_version_info.h"
+#include "chrome/common/url_constants.h"
+#include "content/public/browser/plugin_service.h"
+#include "content/public/browser/web_ui.h"
+#include "content/public/browser/web_ui_message_handler.h"
+#include "content/public/common/content_client.h"
+#include "grit/browser_resources.h"
+#include "grit/chromium_strings.h"
+#include "grit/generated_resources.h"
+#include "grit/google_chrome_strings.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "v8/include/v8.h"
+#include "webkit/glue/user_agent.h"
+#include "webkit/plugins/webplugininfo.h"
+
+namespace {
+
+// Handler class for Version page operations.
+class VersionDOMHandler : public content::WebUIMessageHandler {
+ public:
+  VersionDOMHandler();
+  virtual ~VersionDOMHandler();
+
+  // content::WebUIMessageHandler implementation.
+  virtual void RegisterMessages() OVERRIDE;
+
+  // Callback for the "requestVariationsList" message. This requests the list of
+  // variations from the client and sends it to the frontend.
+  void HandleRequestVariationsList(const ListValue* args);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(VersionDOMHandler);
+};
+
+VersionDOMHandler::VersionDOMHandler() {
+}
+
+VersionDOMHandler::~VersionDOMHandler() {
+}
+
+void VersionDOMHandler::RegisterMessages() {
+  web_ui()->RegisterMessageCallback(
+      "requestVariationsList",
+      base::Bind(&VersionDOMHandler::HandleRequestVariationsList,
+      base::Unretained(this)));
+}
+
+void VersionDOMHandler::HandleRequestVariationsList(const ListValue* args) {
+  scoped_ptr<ListValue> variations_list(new ListValue());
+#if !defined(NDEBUG)
+  std::vector<std::string> variations;

[Evan Stade, 2012/09/10 09:46:59]

declare where it's used.

[SteveT, 2012/09/10 15:14:57]

Added a comment and moved it down closer to the use-site.

+  std::string variation_state;
+  base::FieldTrialList::StatesToString(&variation_state);
+
+  std::vector<std::string> tokens;
+  base::SplitString(variation_state,
+                    base::FieldTrialList::kPersistentStringSeparator,
+                    &tokens);
+  // Since StatesToString appends a separator at the end, SplitString will
+  // append an extra empty string in the vector. Drop it. There should
+  // always be an even number of tokens left.
+  tokens.pop_back();
+  DCHECK_EQ(0U, tokens.size() % 2);
+  for (size_t i = 0; i < tokens.size(); i += 2)
+    variations.push_back(tokens[i] + ":" + tokens[i + 1]);
+
+  for (std::vector<std::string>::const_iterator it = variations.begin();
+      it != variations.end(); ++it) {
+    variations_list->Append(Value::CreateStringValue(*it));
+  }
+#endif
+  // In release mode, this will return an empty list to clear the section.
+  web_ui()->CallJavascriptFunction("returnVariationsList",
+                                   *variations_list.release());
+}
+
+ChromeWebUIDataSource* CreateVersionUIDataSource(Profile* profile) {
+  // Set up the chrome://version source.
+  ChromeWebUIDataSource* html_source =
+      new ChromeWebUIDataSource(chrome::kChromeUIVersionHost);
+  html_source->set_use_json_js_format_v2();
+
+  // Localized and data strings.
+  html_source->AddLocalizedString("title", IDS_ABOUT_VERSION_TITLE);
+  chrome::VersionInfo version_info;
+  html_source->AddLocalizedString("name", IDS_PRODUCT_NAME);
+  html_source->AddString("version", ASCIIToUTF16(version_info.Version()));
+  // Bug 79458: Need to evaluate the use of getting the version string on
+  // this thread.
+  base::ThreadRestrictions::ScopedAllowIO allow_io;
+  html_source->AddString("version_modifier",
+      ASCIIToUTF16(chrome::VersionInfo::GetVersionStringModifier()));
+  html_source->AddLocalizedString("os_name", IDS_ABOUT_VERSION_OS);
+  html_source->AddLocalizedString("platform", IDS_PLATFORM_LABEL);
+  html_source->AddString("os_type", ASCIIToUTF16(version_info.OSType()));
+  html_source->AddString("os_version", string16());
+  html_source->AddString("webkit_version",
+                         ASCIIToUTF16(webkit_glue::GetWebKitVersion()));
+  html_source->AddString("js_engine", ASCIIToUTF16("V8"));
+  html_source->AddString("js_version", ASCIIToUTF16(v8::V8::GetVersion()));
+
+  // Add required resources.
+  html_source->set_json_path("strings.js");
+  html_source->add_resource_path("version.js", IDR_ABOUT_VERSION_JS);
+  html_source->set_default_resource(IDR_ABOUT_VERSION_HTML);
+
+#if !defined(OS_ANDROID)
+  // Obtain the version of the first enabled Flash plugin.
+  std::vector<webkit::WebPluginInfo> info_array;
+  content::PluginService::GetInstance()->GetPluginInfoArray(
+      GURL(), "application/x-shockwave-flash", false, &info_array, NULL);
+  string16 flash_version =
+      l10n_util::GetStringUTF16(IDS_PLUGINS_DISABLED_PLUGIN);
+  PluginPrefs* plugin_prefs = PluginPrefs::GetForProfile(profile);
+  if (plugin_prefs) {
+    for (size_t i = 0; i < info_array.size(); ++i) {
+      if (plugin_prefs->IsPluginEnabled(info_array[i])) {
+        flash_version = info_array[i].version;
+        break;
+      }
+    }
+  }
+  html_source->AddString("flash_plugin", ASCIIToUTF16("Flash"));
+  html_source->AddString("flash_version", flash_version);
+#endif
+  html_source->AddLocalizedString("company", IDS_ABOUT_VERSION_COMPANY_NAME);
+  html_source->AddLocalizedString("copyright", IDS_ABOUT_VERSION_COPYRIGHT);
+  html_source->AddString("cl", ASCIIToUTF16(version_info.LastChange()));
+  html_source->AddLocalizedString("official",
+          version_info.IsOfficialBuild() ?
+              IDS_ABOUT_VERSION_OFFICIAL
+            : IDS_ABOUT_VERSION_UNOFFICIAL);
+  html_source->AddLocalizedString("user_agent_name",
+                                  IDS_ABOUT_VERSION_USER_AGENT);
+  html_source->AddString("useragent",
+                         ASCIIToUTF16(content::GetUserAgent(GURL())));
+  html_source->AddLocalizedString("command_line_name",
+                                  IDS_ABOUT_VERSION_COMMAND_LINE);
+
+#if defined(OS_WIN)
+  html_source->AddString("command_line",
+      WideToUTF16(CommandLine::ForCurrentProcess()->GetCommandLineString()));
+#elif defined(OS_POSIX)
+  std::string command_line = "";
+  typedef std::vector<std::string> ArgvList;
+  const ArgvList& argv = CommandLine::ForCurrentProcess()->argv();
+  for (ArgvList::const_iterator iter = argv.begin(); iter != argv.end(); iter++)
+    command_line += " " + *iter;
+  // TODO(viettrungluu): |command_line| could really have any encoding, whereas
+  // below we assumes it's UTF-8.
+  html_source->AddString("command_line", ASCIIToUTF16(command_line));
+#endif
+
+  // Allow IO temporarily based on allow_io (defined above)
+  // since the following operation will complete quickly
+  html_source->AddLocalizedString("executable_path_name",
+      IDS_ABOUT_VERSION_EXECUTABLE_PATH);
+  FilePath executable_path = CommandLine::ForCurrentProcess()->GetProgram();
+  if (file_util::AbsolutePath(&executable_path)) {
+    html_source->AddString("executable_path",
+                           ASCIIToUTF16(executable_path.value()));
+  } else {
+    html_source->AddLocalizedString("executable_path",
+                                    IDS_ABOUT_VERSION_PATH_NOTFOUND);
+  }
+  html_source->AddLocalizedString("profile_path_name",
+                                  IDS_ABOUT_VERSION_PROFILE_PATH);
+  if (profile) {
+    FilePath profile_path = profile->GetPath();
+    if (file_util::AbsolutePath(&profile_path)) {
+      html_source->AddString("profile_path",
+                             ASCIIToUTF16(profile_path.value()));
+    } else {
+      html_source->AddLocalizedString("profile_path",
+                                      IDS_ABOUT_VERSION_PATH_NOTFOUND);
+    }
+  } else {
+    html_source->AddLocalizedString("profile_path",
+                                    IDS_ABOUT_VERSION_PATH_NOTFOUND);
+  }
+  // TODO(reviewer): Do I need some equivalent to this?
+  // ChromeWebUIDataSource::SetFontAndTextDirection(localized_strings);
+
+#if !defined(NDEBUG)
+  html_source->AddLocalizedString("variations_name",
+                                  IDS_ABOUT_VERSION_VARIATIONS);
+#endif
+
+  return html_source;
+}
+
+}  // namespace
+
+VersionUI::VersionUI(content::WebUI* web_ui)
+    : content::WebUIController(web_ui) {
+  Profile* profile = Profile::FromWebUI(web_ui);
+
+  web_ui->AddMessageHandler(new VersionDOMHandler());
+
+  ChromeURLDataManager::AddDataSource(profile,
+                                      CreateVersionUIDataSource(profile));
+}
+
+VersionUI::~VersionUI() {
+}