chrome/browser/ui/webui/version_handler.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/ui/webui/version_handler.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/file_util.h"
   9 #include "base/metrics/field_trial.h"
  10 #include "base/strings/utf_string_conversions.h"
  11 #include "chrome/browser/plugins/plugin_prefs.h"
  12 #include "chrome/browser/profiles/profile.h"
  13 #include "chrome/common/metrics/variations/variations_util.h"
  14 #include "content/public/browser/browser_thread.h"
  15 #include "content/public/browser/plugin_service.h"
  16 #include "content/public/browser/web_ui.h"
  17 #include "content/public/common/content_constants.h"
  18 #include "grit/generated_resources.h"
  19 #include "ui/base/l10n/l10n_util.h"
  20 #include "url/gurl.h"
  21
  22 namespace {
  23
  24 // Retrieves the executable and profile paths on the FILE thread.
  25 void GetFilePaths(const base::FilePath& profile_path,
  26                   base::string16* exec_path_out,
  27                   base::string16* profile_path_out) {
  28   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::FILE));
  29
  30   base::FilePath executable_path = base::MakeAbsoluteFilePath(
  31       CommandLine::ForCurrentProcess()->GetProgram());
  32   if (!executable_path.empty()) {
  33     *exec_path_out = executable_path.LossyDisplayName();
  34   } else {
  35     *exec_path_out =
  36         l10n_util::GetStringUTF16(IDS_ABOUT_VERSION_PATH_NOTFOUND);
  37   }
  38
  39   base::FilePath profile_path_copy(base::MakeAbsoluteFilePath(profile_path));
  40   if (!profile_path.empty() && !profile_path_copy.empty()) {
  41     *profile_path_out = profile_path.LossyDisplayName();
  42   } else {
  43     *profile_path_out =
  44         l10n_util::GetStringUTF16(IDS_ABOUT_VERSION_PATH_NOTFOUND);
  45   }
  46 }
  47
  48 }  // namespace
  49
  50 VersionHandler::VersionHandler()
  51     : weak_ptr_factory_(this) {
  52 }
  53
  54 VersionHandler::~VersionHandler() {
  55 }
  56
  57 void VersionHandler::RegisterMessages() {
  58   web_ui()->RegisterMessageCallback(
  59       "requestVersionInfo",
  60       base::Bind(&VersionHandler::HandleRequestVersionInfo,
  61       base::Unretained(this)));
  62 }
  63
  64 void VersionHandler::HandleRequestVersionInfo(const base::ListValue* args) {
  65 #if defined(ENABLE_PLUGINS)
  66   // The Flash version information is needed in the response, so make sure
  67   // the plugins are loaded.
  68   content::PluginService::GetInstance()->GetPlugins(
  69       base::Bind(&VersionHandler::OnGotPlugins,
  70           weak_ptr_factory_.GetWeakPtr()));
  71 #endif
  72
  73   // Grab the executable path on the FILE thread. It is returned in
  74   // OnGotFilePaths.
  75   base::string16* exec_path_buffer = new base::string16;
  76   base::string16* profile_path_buffer = new base::string16;
  77   content::BrowserThread::PostTaskAndReply(
  78       content::BrowserThread::FILE, FROM_HERE,
  79           base::Bind(&GetFilePaths, Profile::FromWebUI(web_ui())->GetPath(),
  80                      base::Unretained(exec_path_buffer),
  81                      base::Unretained(profile_path_buffer)),
  82           base::Bind(&VersionHandler::OnGotFilePaths,
  83                      weak_ptr_factory_.GetWeakPtr(),
  84                      base::Owned(exec_path_buffer),
  85                      base::Owned(profile_path_buffer)));
  86
  87   // Respond with the variations info immediately.
  88   std::vector<std::string> variations;
  89 #if !defined(NDEBUG)
  90   base::FieldTrial::ActiveGroups active_groups;
  91   base::FieldTrialList::GetActiveFieldTrialGroups(&active_groups);
  92
  93   const unsigned char kNonBreakingHyphenUTF8[] = { 0xE2, 0x80, 0x91, '\0' };
  94   const std::string kNonBreakingHyphenUTF8String(
  95       reinterpret_cast<const char*>(kNonBreakingHyphenUTF8));
  96   for (size_t i = 0; i < active_groups.size(); ++i) {
  97     std::string line = active_groups[i].trial_name + ":" +
  98                        active_groups[i].group_name;
  99     base::ReplaceChars(line, "-", kNonBreakingHyphenUTF8String, &line);
 100     variations.push_back(line);
 101   }
 102 #else
 103   // In release mode, display the hashes only.
 104   chrome_variations::GetFieldTrialActiveGroupIdsAsStrings(&variations);
 105 #endif
 106
 107   base::ListValue variations_list;
 108   for (std::vector<std::string>::const_iterator it = variations.begin();
 109       it != variations.end(); ++it) {
 110     variations_list.Append(base::Value::CreateStringValue(*it));
 111   }
 112
 113   // In release mode, this will return an empty list to clear the section.
 114   web_ui()->CallJavascriptFunction("returnVariationInfo", variations_list);
 115 }
 116
 117 void VersionHandler::OnGotFilePaths(base::string16* executable_path_data,
 118                                     base::string16* profile_path_data) {
 119   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 120
 121   base::StringValue exec_path(*executable_path_data);
 122   base::StringValue profile_path(*profile_path_data);
 123   web_ui()->CallJavascriptFunction("returnFilePaths", exec_path, profile_path);
 124 }
 125
 126 #if defined(ENABLE_PLUGINS)
 127 void VersionHandler::OnGotPlugins(
 128     const std::vector<content::WebPluginInfo>& plugins) {
 129   // Obtain the version of the first enabled Flash plugin.
 130   std::vector<content::WebPluginInfo> info_array;
 131   content::PluginService::GetInstance()->GetPluginInfoArray(
 132       GURL(), content::kFlashPluginSwfMimeType, false, &info_array, NULL);
 133   base::string16 flash_version =
 134       l10n_util::GetStringUTF16(IDS_PLUGINS_DISABLED_PLUGIN);
 135   PluginPrefs* plugin_prefs =
 136       PluginPrefs::GetForProfile(Profile::FromWebUI(web_ui())).get();
 137   if (plugin_prefs) {
 138     for (size_t i = 0; i < info_array.size(); ++i) {
 139       if (plugin_prefs->IsPluginEnabled(info_array[i])) {
 140         flash_version = info_array[i].version;
 141         break;
 142       }
 143     }
 144   }
 145
 146   base::StringValue arg(flash_version);
 147   web_ui()->CallJavascriptFunction("returnFlashVersion", arg);
 148 }
 149 #endif  // defined(ENABLE_PLUGINS)