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      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/chromeos/offline/offline_load_page.h"
      6 
      7 #include "base/i18n/rtl.h"
      8 #include "base/metrics/histogram.h"
      9 #include "base/string_piece.h"
     10 #include "base/stringprintf.h"
     11 #include "base/utf_string_conversions.h"
     12 #include "base/values.h"
     13 #include "chrome/browser/chromeos/cros/cros_library.h"
     14 #include "chrome/browser/chromeos/cros/network_library.h"
     15 #include "chrome/browser/extensions/extension_service.h"
     16 #include "chrome/browser/profiles/profile.h"
     17 #include "chrome/browser/tab_contents/tab_util.h"
     18 #include "chrome/browser/ui/browser.h"
     19 #include "chrome/browser/ui/browser_list.h"
     20 #include "chrome/common/extensions/extension.h"
     21 #include "chrome/common/jstemplate_builder.h"
     22 #include "chrome/common/url_constants.h"
     23 #include "content/browser/browser_thread.h"
     24 #include "content/browser/tab_contents/navigation_controller.h"
     25 #include "content/browser/tab_contents/navigation_entry.h"
     26 #include "content/browser/tab_contents/tab_contents.h"
     27 #include "content/common/notification_service.h"
     28 #include "content/common/notification_type.h"
     29 #include "grit/browser_resources.h"
     30 #include "grit/generated_resources.h"
     31 #include "ui/base/l10n/l10n_util.h"
     32 #include "ui/base/resource/resource_bundle.h"
     33 
     34 namespace {
     35 
     36 // Maximum time to show a blank page.
     37 const int kMaxBlankPeriod = 3000;
     38 
     39 // A utility function to set the dictionary's value given by |resource_id|.
     40 void SetString(DictionaryValue* strings, const char* name, int resource_id) {
     41   strings->SetString(name, l10n_util::GetStringUTF16(resource_id));
     42 }
     43 
     44 }  // namespace
     45 
     46 namespace chromeos {
     47 
     48 // static
     49 void OfflineLoadPage::Show(int process_host_id, int render_view_id,
     50                            const GURL& url, Delegate* delegate) {
     51   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
     52   if (NetworkStateNotifier::is_connected()) {
     53     // Check again in UI thread and proceed if it's connected.
     54     delegate->OnBlockingPageComplete(true);
     55   } else {
     56     TabContents* tab_contents =
     57         tab_util::GetTabContentsByID(process_host_id, render_view_id);
     58     // There is a chance that the tab is closed after we decided to show
     59     // offline and before we actually show the offline page.
     60     if (!tab_contents)
     61       return;
     62     (new OfflineLoadPage(tab_contents, url, delegate))->Show();
     63   }
     64 }
     65 
     66 OfflineLoadPage::OfflineLoadPage(TabContents* tab_contents,
     67                                  const GURL& url,
     68                                  Delegate* delegate)
     69     : InterstitialPage(tab_contents, true, url),
     70       delegate_(delegate),
     71       proceeded_(false),
     72       ALLOW_THIS_IN_INITIALIZER_LIST(method_factory_(this)),
     73       in_test_(false) {
     74   registrar_.Add(this, NotificationType::NETWORK_STATE_CHANGED,
     75                  NotificationService::AllSources());
     76 }
     77 
     78 std::string OfflineLoadPage::GetHTMLContents() {
     79   DictionaryValue strings;
     80   int64 time_to_wait = std::max(
     81       static_cast<int64>(0),
     82       kMaxBlankPeriod -
     83       NetworkStateNotifier::GetOfflineDuration().InMilliseconds());
     84   // Set the timeout to show the page.
     85   strings.SetInteger("time_to_wait", static_cast<int>(time_to_wait));
     86   // Button labels
     87   SetString(&strings, "heading", IDS_OFFLINE_LOAD_HEADLINE);
     88   SetString(&strings, "try_loading", IDS_OFFLINE_TRY_LOADING);
     89   SetString(&strings, "network_settings", IDS_OFFLINE_NETWORK_SETTINGS);
     90 
     91   // Activation
     92   strings.SetBoolean("show_activation", ShowActivationMessage());
     93 
     94   bool rtl = base::i18n::IsRTL();
     95   strings.SetString("textdirection", rtl ? "rtl" : "ltr");
     96 
     97   string16 failed_url(ASCIIToUTF16(url().spec()));
     98   if (rtl)
     99     base::i18n::WrapStringWithLTRFormatting(&failed_url);
    100   strings.SetString("url", failed_url);
    101 
    102   // The offline page for app has icons and slightly different message.
    103   Profile* profile = tab()->profile();
    104   DCHECK(profile);
    105   const Extension* extension = NULL;
    106   ExtensionService* extensions_service = profile->GetExtensionService();
    107   // Extension service does not exist in test.
    108   if (extensions_service)
    109     extension = extensions_service->GetExtensionByWebExtent(url());
    110 
    111   if (extension)
    112     GetAppOfflineStrings(extension, failed_url, &strings);
    113   else
    114     GetNormalOfflineStrings(failed_url, &strings);
    115 
    116   base::StringPiece html(
    117       ResourceBundle::GetSharedInstance().GetRawDataResource(
    118           IDR_OFFLINE_LOAD_HTML));
    119   return jstemplate_builder::GetI18nTemplateHtml(html, &strings);
    120 }
    121 
    122 void OfflineLoadPage::GetAppOfflineStrings(
    123     const Extension* app,
    124     const string16& failed_url,
    125     DictionaryValue* strings) const {
    126   strings->SetString("title", app->name());
    127 
    128   GURL icon_url = app->GetIconURL(Extension::EXTENSION_ICON_LARGE,
    129                                   ExtensionIconSet::MATCH_EXACTLY);
    130   if (icon_url.is_empty()) {
    131     strings->SetString("display_icon", "none");
    132     strings->SetString("icon", string16());
    133   } else {
    134     // Default icon is not accessible from interstitial page.
    135     // TODO(oshima): Figure out how to use default icon.
    136     strings->SetString("display_icon", "block");
    137     strings->SetString("icon", icon_url.spec());
    138   }
    139 
    140   strings->SetString(
    141       "msg",
    142       l10n_util::GetStringFUTF16(IDS_APP_OFFLINE_LOAD_DESCRIPTION,
    143                                  failed_url));
    144 }
    145 
    146 void OfflineLoadPage::GetNormalOfflineStrings(
    147     const string16& failed_url, DictionaryValue* strings) const {
    148   strings->SetString("title", tab()->GetTitle());
    149 
    150   // No icon for normal web site.
    151   strings->SetString("display_icon", "none");
    152   strings->SetString("icon", string16());
    153 
    154   strings->SetString(
    155       "msg",
    156       l10n_util::GetStringFUTF16(IDS_SITE_OFFLINE_LOAD_DESCRIPTION,
    157                                  failed_url));
    158 }
    159 
    160 void OfflineLoadPage::CommandReceived(const std::string& cmd) {
    161   std::string command(cmd);
    162   // The Jasonified response has quotes, remove them.
    163   if (command.length() > 1 && command[0] == '"') {
    164     command = command.substr(1, command.length() - 2);
    165   }
    166   // TODO(oshima): record action for metrics.
    167   if (command == "proceed") {
    168     Proceed();
    169   } else if (command == "dontproceed") {
    170     DontProceed();
    171   } else if (command == "open_network_settings") {
    172     Browser* browser = BrowserList::GetLastActive();
    173     DCHECK(browser);
    174     browser->ShowOptionsTab(chrome::kInternetOptionsSubPage);
    175   } else if (command == "open_activate_broadband") {
    176     Browser* browser = BrowserList::GetLastActive();
    177     DCHECK(browser);
    178     browser->OpenMobilePlanTabAndActivate();
    179   } else {
    180     LOG(WARNING) << "Unknown command:" << cmd;
    181   }
    182 }
    183 
    184 void OfflineLoadPage::Proceed() {
    185   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
    186   proceeded_ = true;
    187   delegate_->OnBlockingPageComplete(true);
    188   InterstitialPage::Proceed();
    189 }
    190 
    191 void OfflineLoadPage::DontProceed() {
    192   // Inogre if it's already proceeded.
    193   if (proceeded_)
    194     return;
    195   delegate_->OnBlockingPageComplete(false);
    196   InterstitialPage::DontProceed();
    197 }
    198 
    199 void OfflineLoadPage::Observe(NotificationType type,
    200                               const NotificationSource& source,
    201                               const NotificationDetails& details) {
    202   if (type.value == NotificationType::NETWORK_STATE_CHANGED) {
    203     chromeos::NetworkStateDetails* state_details =
    204         Details<chromeos::NetworkStateDetails>(details).ptr();
    205     DVLOG(1) << "NetworkStateChanaged notification received: state="
    206              << state_details->state();
    207     if (state_details->state() ==
    208         chromeos::NetworkStateDetails::CONNECTED) {
    209       registrar_.Remove(this, NotificationType::NETWORK_STATE_CHANGED,
    210                         NotificationService::AllSources());
    211       Proceed();
    212     }
    213   } else {
    214     InterstitialPage::Observe(type, source, details);
    215   }
    216 }
    217 
    218 bool OfflineLoadPage::ShowActivationMessage() {
    219   CrosLibrary* cros = CrosLibrary::Get();
    220   if (!cros || !cros->GetNetworkLibrary()->cellular_available())
    221     return false;
    222 
    223   const CellularNetworkVector& cell_networks =
    224       cros->GetNetworkLibrary()->cellular_networks();
    225   for (size_t i = 0; i < cell_networks.size(); ++i) {
    226     chromeos::ActivationState activation_state =
    227         cell_networks[i]->activation_state();
    228     if (activation_state == ACTIVATION_STATE_ACTIVATED)
    229       return false;
    230   }
    231   return true;
    232 }
    233 
    234 }  // namespace chromeos
    235