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      1 // Copyright 2013 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/components_ui.h"
      6 
      7 #include <algorithm>
      8 #include <string>
      9 #include <vector>
     10 
     11 #include "base/values.h"
     12 #include "chrome/browser/browser_process.h"
     13 #include "chrome/browser/ui/browser.h"
     14 #include "chrome/browser/ui/browser_window.h"
     15 #include "chrome/common/chrome_paths.h"
     16 #include "chrome/common/url_constants.h"
     17 #include "chrome/grit/generated_resources.h"
     18 #include "components/component_updater/component_updater_service.h"
     19 #include "components/component_updater/crx_update_item.h"
     20 #include "content/public/browser/web_ui.h"
     21 #include "content/public/browser/web_ui_data_source.h"
     22 #include "content/public/browser/web_ui_message_handler.h"
     23 #include "grit/browser_resources.h"
     24 #include "grit/theme_resources.h"
     25 #include "ui/base/l10n/l10n_util.h"
     26 #include "ui/base/resource/resource_bundle.h"
     27 
     28 #if defined(OS_CHROMEOS)
     29 #include "chrome/browser/ui/webui/chromeos/ui_account_tweaks.h"
     30 #endif
     31 
     32 using content::WebUIMessageHandler;
     33 
     34 namespace {
     35 
     36 content::WebUIDataSource* CreateComponentsUIHTMLSource(Profile* profile) {
     37   content::WebUIDataSource* source =
     38       content::WebUIDataSource::Create(chrome::kChromeUIComponentsHost);
     39   source->SetUseJsonJSFormatV2();
     40 
     41   source->AddLocalizedString("componentsTitle", IDS_COMPONENTS_TITLE);
     42   source->AddLocalizedString("componentsNoneInstalled",
     43                              IDS_COMPONENTS_NONE_INSTALLED);
     44   source->AddLocalizedString("componentVersion", IDS_COMPONENTS_VERSION);
     45   source->AddLocalizedString("checkUpdate", IDS_COMPONENTS_CHECK_FOR_UPDATE);
     46   source->AddLocalizedString("noComponents", IDS_COMPONENTS_NO_COMPONENTS);
     47   source->AddLocalizedString("statusLabel", IDS_COMPONENTS_STATUS_LABEL);
     48   source->AddLocalizedString("checkingLabel", IDS_COMPONENTS_CHECKING_LABEL);
     49 
     50   source->SetJsonPath("strings.js");
     51   source->AddResourcePath("components.js", IDR_COMPONENTS_JS);
     52   source->SetDefaultResource(IDR_COMPONENTS_HTML);
     53 #if defined(OS_CHROMEOS)
     54   chromeos::AddAccountUITweaksLocalizedValues(source, profile);
     55 #endif
     56   return source;
     57 }
     58 
     59 ////////////////////////////////////////////////////////////////////////////////
     60 //
     61 // ComponentsDOMHandler
     62 //
     63 ////////////////////////////////////////////////////////////////////////////////
     64 
     65 // The handler for Javascript messages for the chrome://components/ page.
     66 class ComponentsDOMHandler : public WebUIMessageHandler {
     67  public:
     68   ComponentsDOMHandler();
     69   virtual ~ComponentsDOMHandler() {}
     70 
     71   // WebUIMessageHandler implementation.
     72   virtual void RegisterMessages() OVERRIDE;
     73 
     74   // Callback for the "requestComponentsData" message.
     75   void HandleRequestComponentsData(const base::ListValue* args);
     76 
     77   // Callback for the "checkUpdate" message.
     78   void HandleCheckUpdate(const base::ListValue* args);
     79 
     80  private:
     81   content::NotificationRegistrar registrar_;
     82 
     83   DISALLOW_COPY_AND_ASSIGN(ComponentsDOMHandler);
     84 };
     85 
     86 ComponentsDOMHandler::ComponentsDOMHandler() {
     87 }
     88 
     89 void ComponentsDOMHandler::RegisterMessages() {
     90   web_ui()->RegisterMessageCallback(
     91       "requestComponentsData",
     92       base::Bind(&ComponentsDOMHandler::HandleRequestComponentsData,
     93                  base::Unretained(this)));
     94 
     95   web_ui()->RegisterMessageCallback(
     96       "checkUpdate",
     97       base::Bind(&ComponentsDOMHandler::HandleCheckUpdate,
     98                  base::Unretained(this)));
     99 }
    100 
    101 void ComponentsDOMHandler::HandleRequestComponentsData(
    102     const base::ListValue* args) {
    103   base::ListValue* list = ComponentsUI::LoadComponents();
    104   base::DictionaryValue result;
    105   result.Set("components", list);
    106   web_ui()->CallJavascriptFunction("returnComponentsData", result);
    107 }
    108 
    109 // This function is called when user presses button from html UI.
    110 // TODO(shrikant): We need to make this button available based on current
    111 // state e.g. If component state is currently updating then we need to disable
    112 // button. (https://code.google.com/p/chromium/issues/detail?id=272540)
    113 void ComponentsDOMHandler::HandleCheckUpdate(const base::ListValue* args) {
    114   if (args->GetSize() != 1) {
    115     NOTREACHED();
    116     return;
    117   }
    118 
    119   std::string component_id;
    120   if (!args->GetString(0, &component_id)) {
    121     NOTREACHED();
    122     return;
    123   }
    124 
    125   ComponentsUI::OnDemandUpdate(component_id);
    126 }
    127 
    128 }  // namespace
    129 
    130 ///////////////////////////////////////////////////////////////////////////////
    131 //
    132 // ComponentsUI
    133 //
    134 ///////////////////////////////////////////////////////////////////////////////
    135 
    136 ComponentsUI::ComponentsUI(content::WebUI* web_ui) : WebUIController(web_ui) {
    137   web_ui->AddMessageHandler(new ComponentsDOMHandler());
    138 
    139   // Set up the chrome://components/ source.
    140   Profile* profile = Profile::FromWebUI(web_ui);
    141   content::WebUIDataSource::Add(profile, CreateComponentsUIHTMLSource(profile));
    142   component_updater::ComponentUpdateService* cus =
    143       g_browser_process->component_updater();
    144   cus->AddObserver(this);
    145 }
    146 
    147 ComponentsUI::~ComponentsUI() {
    148   component_updater::ComponentUpdateService* cus =
    149       g_browser_process->component_updater();
    150   if (cus)
    151     cus->RemoveObserver(this);
    152 }
    153 
    154 // static
    155 void ComponentsUI::OnDemandUpdate(const std::string& component_id) {
    156   component_updater::ComponentUpdateService* cus =
    157       g_browser_process->component_updater();
    158   cus->GetOnDemandUpdater().OnDemandUpdate(component_id);
    159 }
    160 
    161 // static
    162 base::ListValue* ComponentsUI::LoadComponents() {
    163   component_updater::ComponentUpdateService* cus =
    164       g_browser_process->component_updater();
    165   std::vector<std::string> component_ids;
    166   component_ids = cus->GetComponentIDs();
    167 
    168   // Construct DictionaryValues to return to UI.
    169   base::ListValue* component_list = new base::ListValue();
    170   for (size_t j = 0; j < component_ids.size(); ++j) {
    171     component_updater::CrxUpdateItem item;
    172     if (cus->GetComponentDetails(component_ids[j], &item)) {
    173       base::DictionaryValue* component_entry = new base::DictionaryValue();
    174       component_entry->SetString("id", component_ids[j]);
    175       component_entry->SetString("name", item.component.name);
    176       component_entry->SetString("version", item.component.version.GetString());
    177       component_entry->SetString("status", ServiceStatusToString(item.status));
    178       component_list->Append(component_entry);
    179     }
    180   }
    181 
    182   return component_list;
    183 }
    184 
    185 // static
    186 base::RefCountedMemory* ComponentsUI::GetFaviconResourceBytes(
    187       ui::ScaleFactor scale_factor) {
    188   return ResourceBundle::GetSharedInstance().
    189       LoadDataResourceBytesForScale(IDR_PLUGINS_FAVICON, scale_factor);
    190 }
    191 
    192 base::string16 ComponentsUI::ComponentEventToString(Events event) {
    193   switch (event) {
    194     case COMPONENT_UPDATER_STARTED:
    195       return l10n_util::GetStringUTF16(IDS_COMPONENTS_EVT_STATUS_STARTED);
    196     case COMPONENT_UPDATER_SLEEPING:
    197       return l10n_util::GetStringUTF16(IDS_COMPONENTS_EVT_STATUS_SLEEPING);
    198     case COMPONENT_UPDATE_FOUND:
    199       return l10n_util::GetStringUTF16(IDS_COMPONENTS_EVT_STATUS_FOUND);
    200     case COMPONENT_UPDATE_READY:
    201       return l10n_util::GetStringUTF16(IDS_COMPONENTS_EVT_STATUS_READY);
    202     case COMPONENT_UPDATED:
    203       return l10n_util::GetStringUTF16(IDS_COMPONENTS_EVT_STATUS_UPDATED);
    204     case COMPONENT_NOT_UPDATED:
    205       return l10n_util::GetStringUTF16(IDS_COMPONENTS_EVT_STATUS_NOTUPDATED);
    206     case COMPONENT_UPDATE_DOWNLOADING:
    207       return l10n_util::GetStringUTF16(IDS_COMPONENTS_EVT_STATUS_DOWNLOADING);
    208   }
    209   return l10n_util::GetStringUTF16(IDS_COMPONENTS_UNKNOWN);
    210 }
    211 
    212 base::string16 ComponentsUI::ServiceStatusToString(
    213     component_updater::CrxUpdateItem::Status status) {
    214   switch (status) {
    215     case component_updater::CrxUpdateItem::kNew:
    216       return l10n_util::GetStringUTF16(IDS_COMPONENTS_SVC_STATUS_NEW);
    217     case component_updater::CrxUpdateItem::kChecking:
    218       return l10n_util::GetStringUTF16(IDS_COMPONENTS_SVC_STATUS_CHECKING);
    219     case component_updater::CrxUpdateItem::kCanUpdate:
    220       return l10n_util::GetStringUTF16(IDS_COMPONENTS_SVC_STATUS_UPDATE);
    221     case component_updater::CrxUpdateItem::kDownloadingDiff:
    222       return l10n_util::GetStringUTF16(IDS_COMPONENTS_SVC_STATUS_DNL_DIFF);
    223     case component_updater::CrxUpdateItem::kDownloading:
    224       return l10n_util::GetStringUTF16(IDS_COMPONENTS_SVC_STATUS_DNL);
    225     case component_updater::CrxUpdateItem::kUpdatingDiff:
    226       return l10n_util::GetStringUTF16(IDS_COMPONENTS_SVC_STATUS_UPDT_DIFF);
    227     case component_updater::CrxUpdateItem::kUpdating:
    228       return l10n_util::GetStringUTF16(IDS_COMPONENTS_SVC_STATUS_UPDATING);
    229     case component_updater::CrxUpdateItem::kUpdated:
    230       return l10n_util::GetStringUTF16(IDS_COMPONENTS_SVC_STATUS_UPDATED);
    231     case component_updater::CrxUpdateItem::kUpToDate:
    232       return l10n_util::GetStringUTF16(IDS_COMPONENTS_SVC_STATUS_UPTODATE);
    233     case component_updater::CrxUpdateItem::kNoUpdate:
    234       return l10n_util::GetStringUTF16(IDS_COMPONENTS_SVC_STATUS_NOUPDATE);
    235     case component_updater::CrxUpdateItem::kLastStatus:
    236       return l10n_util::GetStringUTF16(IDS_COMPONENTS_UNKNOWN);
    237   }
    238   return l10n_util::GetStringUTF16(IDS_COMPONENTS_UNKNOWN);
    239 }
    240 
    241 void ComponentsUI::OnEvent(Events event, const std::string& id) {
    242   base::DictionaryValue parameters;
    243   parameters.SetString("event", ComponentEventToString(event));
    244   if (!id.empty()) {
    245     using component_updater::ComponentUpdateService;
    246     if (event == ComponentUpdateService::Observer::COMPONENT_UPDATED) {
    247       ComponentUpdateService* cus = g_browser_process->component_updater();
    248       component_updater::CrxUpdateItem item;
    249       if (cus->GetComponentDetails(id, &item))
    250         parameters.SetString("version", item.component.version.GetString());
    251     }
    252     parameters.SetString("id", id);
    253   }
    254   web_ui()->CallJavascriptFunction("onComponentEvent", parameters);
    255 }
    256