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
22namespace {
23
24// Retrieves the executable and profile paths on the FILE thread.
25void GetFilePaths(const base::FilePath& profile_path,
26                  string16* exec_path_out,
27                  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
50VersionHandler::VersionHandler()
51    : weak_ptr_factory_(this) {
52}
53
54VersionHandler::~VersionHandler() {
55}
56
57void VersionHandler::RegisterMessages() {
58  web_ui()->RegisterMessageCallback(
59      "requestVersionInfo",
60      base::Bind(&VersionHandler::HandleRequestVersionInfo,
61      base::Unretained(this)));
62}
63
64void VersionHandler::HandleRequestVersionInfo(const 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  string16* exec_path_buffer = new string16;
76  string16* profile_path_buffer = new 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  scoped_ptr<ListValue> variations_list(new ListValue());
89  std::vector<std::string> variations;
90#if !defined(NDEBUG)
91  base::FieldTrial::ActiveGroups active_groups;
92  base::FieldTrialList::GetActiveFieldTrialGroups(&active_groups);
93
94  const unsigned char kNonBreakingHyphenUTF8[] = { 0xE2, 0x80, 0x91, '\0' };
95  const std::string kNonBreakingHyphenUTF8String(
96      reinterpret_cast<const char*>(kNonBreakingHyphenUTF8));
97  for (size_t i = 0; i < active_groups.size(); ++i) {
98    std::string line = active_groups[i].trial_name + ":" +
99                       active_groups[i].group_name;
100    ReplaceChars(line, "-", kNonBreakingHyphenUTF8String, &line);
101    variations.push_back(line);
102  }
103#else
104  // In release mode, display the hashes only.
105  std::vector<string16> active_groups;
106  chrome_variations::GetFieldTrialActiveGroupIdsAsStrings(&active_groups);
107  for (size_t i = 0; i < active_groups.size(); ++i)
108    variations.push_back(UTF16ToASCII(active_groups[i]));
109#endif
110
111  for (std::vector<std::string>::const_iterator it = variations.begin();
112      it != variations.end(); ++it) {
113    variations_list->Append(Value::CreateStringValue(*it));
114  }
115
116  // In release mode, this will return an empty list to clear the section.
117  web_ui()->CallJavascriptFunction("returnVariationInfo",
118                                   *variations_list.release());
119}
120
121void VersionHandler::OnGotFilePaths(string16* executable_path_data,
122                                    string16* profile_path_data) {
123  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
124
125  StringValue exec_path(*executable_path_data);
126  StringValue profile_path(*profile_path_data);
127  web_ui()->CallJavascriptFunction("returnFilePaths", exec_path, profile_path);
128}
129
130#if defined(ENABLE_PLUGINS)
131void VersionHandler::OnGotPlugins(
132    const std::vector<content::WebPluginInfo>& plugins) {
133  // Obtain the version of the first enabled Flash plugin.
134  std::vector<content::WebPluginInfo> info_array;
135  content::PluginService::GetInstance()->GetPluginInfoArray(
136      GURL(), content::kFlashPluginSwfMimeType, false, &info_array, NULL);
137  string16 flash_version =
138      l10n_util::GetStringUTF16(IDS_PLUGINS_DISABLED_PLUGIN);
139  PluginPrefs* plugin_prefs =
140      PluginPrefs::GetForProfile(Profile::FromWebUI(web_ui())).get();
141  if (plugin_prefs) {
142    for (size_t i = 0; i < info_array.size(); ++i) {
143      if (plugin_prefs->IsPluginEnabled(info_array[i])) {
144        flash_version = info_array[i].version;
145        break;
146      }
147    }
148  }
149
150  StringValue arg(flash_version);
151  web_ui()->CallJavascriptFunction("returnFlashVersion", arg);
152}
153#endif  // defined(ENABLE_PLUGINS)
154