1// Copyright (c) 2011 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/shown_sections_handler.h"
6
7#include <string>
8
9#include "base/callback.h"
10#include "base/command_line.h"
11#include "base/string_number_conversions.h"
12#include "base/values.h"
13#include "chrome/browser/metrics/user_metrics.h"
14#include "chrome/browser/prefs/pref_service.h"
15#include "chrome/browser/profiles/profile.h"
16#include "chrome/common/extensions/extension.h"
17#include "chrome/common/pref_names.h"
18#include "content/common/notification_details.h"
19#include "content/common/notification_type.h"
20
21namespace {
22
23// Will cause an UMA notification if the mode of the new tab page
24// was changed to hide/show the most visited thumbnails.
25// TODO(aa): Needs to be updated to match newest NTP - http://crbug.com/57440
26void NotifySectionDisabled(int new_mode, int old_mode, Profile *profile) {
27  // If the oldmode HAD either thumbs or lists visible.
28  bool old_had_it = (old_mode & THUMB) && !(old_mode & MENU_THUMB);
29  bool new_has_it = (new_mode & THUMB) && !(new_mode & MENU_THUMB);
30
31  if (old_had_it && !new_has_it) {
32    UserMetrics::RecordAction(
33        UserMetricsAction("ShowSections_RecentSitesDisabled"),
34        profile);
35  }
36
37  if (new_has_it && !old_had_it) {
38    UserMetrics::RecordAction(
39        UserMetricsAction("ShowSections_RecentSitesEnabled"),
40        profile);
41  }
42}
43
44}  // namespace
45
46// static
47int ShownSectionsHandler::GetShownSections(PrefService* prefs) {
48  return prefs->GetInteger(prefs::kNTPShownSections);
49}
50
51// static
52void ShownSectionsHandler::SetShownSection(PrefService* prefs,
53                                           Section section) {
54  int shown_sections = GetShownSections(prefs);
55  shown_sections &= ~ALL_SECTIONS_MASK;
56  shown_sections |= section;
57  prefs->SetInteger(prefs::kNTPShownSections, shown_sections);
58}
59
60ShownSectionsHandler::ShownSectionsHandler(PrefService* pref_service)
61    : pref_service_(pref_service) {
62  pref_registrar_.Init(pref_service);
63  pref_registrar_.Add(prefs::kNTPShownSections, this);
64}
65
66void ShownSectionsHandler::RegisterMessages() {
67  web_ui_->RegisterMessageCallback("getShownSections",
68      NewCallback(this, &ShownSectionsHandler::HandleGetShownSections));
69  web_ui_->RegisterMessageCallback("setShownSections",
70      NewCallback(this, &ShownSectionsHandler::HandleSetShownSections));
71}
72
73void ShownSectionsHandler::Observe(NotificationType type,
74                                   const NotificationSource& source,
75                                   const NotificationDetails& details) {
76  if (type == NotificationType::PREF_CHANGED) {
77    std::string* pref_name = Details<std::string>(details).ptr();
78    DCHECK(*pref_name == prefs::kNTPShownSections);
79    int sections = pref_service_->GetInteger(prefs::kNTPShownSections);
80    FundamentalValue sections_value(sections);
81    web_ui_->CallJavascriptFunction("setShownSections", sections_value);
82  } else {
83    NOTREACHED();
84  }
85}
86
87void ShownSectionsHandler::HandleGetShownSections(const ListValue* args) {
88  int sections = GetShownSections(pref_service_);
89  FundamentalValue sections_value(sections);
90  web_ui_->CallJavascriptFunction("onShownSections", sections_value);
91}
92
93void ShownSectionsHandler::HandleSetShownSections(const ListValue* args) {
94  double mode_double;
95  CHECK(args->GetDouble(0, &mode_double));
96  int mode = static_cast<int>(mode_double);
97  int old_mode = pref_service_->GetInteger(prefs::kNTPShownSections);
98
99  if (old_mode != mode) {
100    NotifySectionDisabled(mode, old_mode, web_ui_->GetProfile());
101    pref_service_->SetInteger(prefs::kNTPShownSections, mode);
102  }
103}
104
105// static
106void ShownSectionsHandler::RegisterUserPrefs(PrefService* pref_service) {
107#if defined(OS_CHROMEOS)
108  // Default to have expanded APPS and all other sections are minimized.
109  pref_service->RegisterIntegerPref(prefs::kNTPShownSections,
110                                    APPS | MENU_THUMB | MENU_RECENT);
111#else
112  pref_service->RegisterIntegerPref(prefs::kNTPShownSections, THUMB);
113#endif
114}
115
116// static
117void ShownSectionsHandler::MigrateUserPrefs(PrefService* pref_service,
118                                            int old_pref_version,
119                                            int new_pref_version) {
120  // Nothing to migrate for default kNTPShownSections value.
121  const PrefService::Preference* shown_sections_pref =
122      pref_service->FindPreference(prefs::kNTPShownSections);
123  if (!shown_sections_pref || shown_sections_pref->IsDefaultValue())
124    return;
125
126  bool changed = false;
127  int shown_sections = pref_service->GetInteger(prefs::kNTPShownSections);
128
129  if (old_pref_version < 3) {
130    // In version 3, we went from being able to show multiple sections to being
131    // able to show only one expanded at a time. The only two expandable
132    // sections are APPS and THUMBS.
133    if (shown_sections & APPS)
134      shown_sections = APPS;
135    else
136      shown_sections = THUMB;
137
138    changed = true;
139  }
140
141  if (changed)
142    pref_service->SetInteger(prefs::kNTPShownSections, shown_sections);
143}
144
145// static
146void ShownSectionsHandler::OnExtensionInstalled(PrefService* prefs,
147                                                const Extension* extension) {
148  if (extension->is_app()) {
149    int mode = prefs->GetInteger(prefs::kNTPShownSections);
150
151    // De-menu-mode the apps section.
152    mode &= ~MENU_APPS;
153
154    // Hide any open sections.
155    mode &= ~ALL_SECTIONS_MASK;
156
157    // Show the apps section.
158    mode |= APPS;
159
160    prefs->SetInteger(prefs::kNTPShownSections, mode);
161  }
162}
163