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/files/file_util.h"
9#include "base/metrics/field_trial.h"
10#include "base/strings/string_util.h"
11#include "base/strings/utf_string_conversions.h"
12#include "chrome/browser/plugins/plugin_prefs.h"
13#include "chrome/browser/profiles/profile.h"
14#include "chrome/grit/generated_resources.h"
15#include "components/variations/active_field_trials.h"
16#include "content/public/browser/browser_thread.h"
17#include "content/public/browser/plugin_service.h"
18#include "content/public/browser/web_ui.h"
19#include "content/public/common/content_constants.h"
20#include "ui/base/l10n/l10n_util.h"
21#include "url/gurl.h"
22
23namespace {
24
25// Retrieves the executable and profile paths on the FILE thread.
26void GetFilePaths(const base::FilePath& profile_path,
27                  base::string16* exec_path_out,
28                  base::string16* profile_path_out) {
29  DCHECK_CURRENTLY_ON(content::BrowserThread::FILE);
30
31  base::FilePath executable_path = base::MakeAbsoluteFilePath(
32      CommandLine::ForCurrentProcess()->GetProgram());
33  if (!executable_path.empty()) {
34    *exec_path_out = executable_path.LossyDisplayName();
35  } else {
36    *exec_path_out =
37        l10n_util::GetStringUTF16(IDS_ABOUT_VERSION_PATH_NOTFOUND);
38  }
39
40  base::FilePath profile_path_copy(base::MakeAbsoluteFilePath(profile_path));
41  if (!profile_path.empty() && !profile_path_copy.empty()) {
42    *profile_path_out = profile_path.LossyDisplayName();
43  } else {
44    *profile_path_out =
45        l10n_util::GetStringUTF16(IDS_ABOUT_VERSION_PATH_NOTFOUND);
46  }
47}
48
49}  // namespace
50
51VersionHandler::VersionHandler()
52    : weak_ptr_factory_(this) {
53}
54
55VersionHandler::~VersionHandler() {
56}
57
58void VersionHandler::RegisterMessages() {
59  web_ui()->RegisterMessageCallback(
60      "requestVersionInfo",
61      base::Bind(&VersionHandler::HandleRequestVersionInfo,
62      base::Unretained(this)));
63}
64
65void VersionHandler::HandleRequestVersionInfo(const base::ListValue* args) {
66#if defined(ENABLE_PLUGINS)
67  // The Flash version information is needed in the response, so make sure
68  // the plugins are loaded.
69  content::PluginService::GetInstance()->GetPlugins(
70      base::Bind(&VersionHandler::OnGotPlugins,
71          weak_ptr_factory_.GetWeakPtr()));
72#endif
73
74  // Grab the executable path on the FILE thread. It is returned in
75  // OnGotFilePaths.
76  base::string16* exec_path_buffer = new base::string16;
77  base::string16* profile_path_buffer = new base::string16;
78  content::BrowserThread::PostTaskAndReply(
79      content::BrowserThread::FILE, FROM_HERE,
80          base::Bind(&GetFilePaths, Profile::FromWebUI(web_ui())->GetPath(),
81                     base::Unretained(exec_path_buffer),
82                     base::Unretained(profile_path_buffer)),
83          base::Bind(&VersionHandler::OnGotFilePaths,
84                     weak_ptr_factory_.GetWeakPtr(),
85                     base::Owned(exec_path_buffer),
86                     base::Owned(profile_path_buffer)));
87
88  // Respond with the variations info immediately.
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    base::ReplaceChars(line, "-", kNonBreakingHyphenUTF8String, &line);
101    variations.push_back(line);
102  }
103#else
104  // In release mode, display the hashes only.
105  variations::GetFieldTrialActiveGroupIdsAsStrings(&variations);
106#endif
107
108  base::ListValue variations_list;
109  for (std::vector<std::string>::const_iterator it = variations.begin();
110      it != variations.end(); ++it) {
111    variations_list.Append(new base::StringValue(*it));
112  }
113
114  // In release mode, this will return an empty list to clear the section.
115  web_ui()->CallJavascriptFunction("returnVariationInfo", variations_list);
116}
117
118void VersionHandler::OnGotFilePaths(base::string16* executable_path_data,
119                                    base::string16* profile_path_data) {
120  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
121
122  base::StringValue exec_path(*executable_path_data);
123  base::StringValue profile_path(*profile_path_data);
124  web_ui()->CallJavascriptFunction("returnFilePaths", exec_path, profile_path);
125}
126
127#if defined(ENABLE_PLUGINS)
128void VersionHandler::OnGotPlugins(
129    const std::vector<content::WebPluginInfo>& plugins) {
130  // Obtain the version of the first enabled Flash plugin.
131  std::vector<content::WebPluginInfo> info_array;
132  content::PluginService::GetInstance()->GetPluginInfoArray(
133      GURL(), content::kFlashPluginSwfMimeType, false, &info_array, NULL);
134  base::string16 flash_version =
135      l10n_util::GetStringUTF16(IDS_PLUGINS_DISABLED_PLUGIN);
136  PluginPrefs* plugin_prefs =
137      PluginPrefs::GetForProfile(Profile::FromWebUI(web_ui())).get();
138  if (plugin_prefs) {
139    for (size_t i = 0; i < info_array.size(); ++i) {
140      if (plugin_prefs->IsPluginEnabled(info_array[i])) {
141        flash_version = info_array[i].version;
142        break;
143      }
144    }
145  }
146
147  base::StringValue arg(flash_version);
148  web_ui()->CallJavascriptFunction("returnFlashVersion", arg);
149}
150#endif  // defined(ENABLE_PLUGINS)
151