Display an info banner on the clear browsing data dialog if the browsing data was cleared within th…

chrome/browser/ui/webui/options/clear_browser_data_handler.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/webui/options/clear_browser_data_handler.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/string16.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browsing_data/browsing_data_helper.h"
 #include "chrome/browser/browsing_data/browsing_data_remover.h"
 #include "chrome/browser/google/google_util.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/pref_names.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/web_ui.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "grit/locale_settings.h"
+#include "ui/base/accelerators/accelerator.h"
 #include "ui/base/l10n/l10n_util.h"
 
 namespace {
 const char kClearBrowsingDataLearnMoreUrl[] =
     "https://support.google.com/chrome/?p=settings_clear_browsing_data";
 }
 
 namespace options {
 
 ClearBrowserDataHandler::ClearBrowserDataHandler()
     : remover_(NULL) {
 }
 
 ClearBrowserDataHandler::~ClearBrowserDataHandler() {
   if (remover_)
     remover_->RemoveObserver(this);
 }
 
 void ClearBrowserDataHandler::InitializeHandler() {
   clear_plugin_lso_data_enabled_.Init(prefs::kClearPluginLSODataEnabled,
                                       Profile::FromWebUI(web_ui())->GetPrefs());
   pepper_flash_settings_enabled_.Init(prefs::kPepperFlashSettingsEnabled,
                                       Profile::FromWebUI(web_ui())->GetPrefs());
 }
 
+void ClearBrowserDataHandler::InitializePage() {
+  UpdateInfoBannerVisibility();
+}
+
+void ClearBrowserDataHandler::UpdateInfoBannerVisibility() {
+  Profile* profile = Profile::FromWebUI(web_ui());
+  base::Time lastClearBrowsingDataTime = base::Time::FromInternalValue(
+      profile->GetPrefs()->GetInt64(prefs::kLastClearBrowsingDataTime));
+
+  const int64 kHoursPerDay = 24;
+  bool visible = (base::Time::Now() - lastClearBrowsingDataTime) <=
+      base::TimeDelta::FromHours(kHoursPerDay);
+
+  ListValue args;
+  args.Append(Value::CreateBooleanValue(visible));
+  web_ui()->CallJavascriptFunction(
+      "ClearBrowserDataOverlay.setBannerVisibility", args);
+}
+
 void ClearBrowserDataHandler::GetLocalizedValues(
     DictionaryValue* localized_strings) {
   DCHECK(localized_strings);
 
   static OptionsStringResource resources[] = {
     { "clearBrowserDataLabel", IDS_CLEAR_BROWSING_DATA_LABEL },
     { "deleteBrowsingHistoryCheckbox", IDS_DEL_BROWSING_HISTORY_CHKBOX },
     { "deleteDownloadHistoryCheckbox", IDS_DEL_DOWNLOAD_HISTORY_CHKBOX },
     { "deleteCacheCheckbox", IDS_DEL_CACHE_CHKBOX },
     { "deleteCookiesCheckbox", IDS_DEL_COOKIES_CHKBOX },
     { "deleteCookiesFlashCheckbox", IDS_DEL_COOKIES_FLASH_CHKBOX },
     { "deletePasswordsCheckbox", IDS_DEL_PASSWORDS_CHKBOX },
     { "deleteFormDataCheckbox", IDS_DEL_FORM_DATA_CHKBOX },
     { "deleteHostedAppsDataCheckbox", IDS_DEL_HOSTED_APPS_DATA_CHKBOX },
     { "deauthorizeContentLicensesCheckbox",
       IDS_DEAUTHORIZE_CONTENT_LICENSES_CHKBOX },
     { "clearBrowserDataCommit", IDS_CLEAR_BROWSING_DATA_COMMIT },
     { "flash_storage_url", IDS_FLASH_STORAGE_URL },
   };
 
   RegisterStrings(localized_strings, resources, arraysize(resources));
   RegisterTitle(localized_strings, "clearBrowserDataOverlay",
                 IDS_CLEAR_BROWSING_DATA_TITLE);
   localized_strings->SetString(
       "clearBrowsingDataLearnMoreUrl",
       google_util::StringAppendGoogleLocaleParam(
           kClearBrowsingDataLearnMoreUrl));
 
+  ui::Accelerator acc(ui::VKEY_N, ui::EF_CONTROL_DOWN | ui::EF_SHIFT_DOWN);
+  localized_strings->SetString(
+      "clearBrowserDataInfoBar",
+      l10n_util::GetStringFUTF16(
+          IDS_CLEAR_BROWSING_DATA_INFO_BAR_TEXT,
+          acc.GetShortcutText()));
+
   ListValue* time_list = new ListValue;
   for (int i = 0; i < 5; i++) {
     string16 label_string;
     switch (i) {
       case 0:
         label_string = l10n_util::GetStringUTF16(IDS_CLEAR_DATA_HOUR);
         break;
       case 1:
         label_string = l10n_util::GetStringUTF16(IDS_CLEAR_DATA_DAY);
         break;
@@ skipping 58 matching lines @@
     remove_mask |= site_data_mask;
     origin_mask |= BrowsingDataHelper::PROTECTED_WEB;
   }
 
   // BrowsingDataRemover deletes itself when done.
   int period_selected = prefs->GetInteger(prefs::kDeleteTimePeriod);
   remover_ = BrowsingDataRemover::CreateForPeriod(profile,
       static_cast<BrowsingDataRemover::TimePeriod>(period_selected));
   remover_->AddObserver(this);
   remover_->Remove(remove_mask, origin_mask);
+
+  // Store the clear browsing data time. Next time the clear browsing data
+  // dialog is open, this time is used to decide whether to display an info
+  // banner or not.
+  prefs->SetInt64(prefs::kLastClearBrowsingDataTime,
+                  base::Time::Now().ToInternalValue());
 }
 
 void ClearBrowserDataHandler::OnBrowsingDataRemoverDone() {
   // No need to remove ourselves as an observer as BrowsingDataRemover deletes
   // itself after we return.
   remover_ = NULL;
   web_ui()->CallJavascriptFunction("ClearBrowserDataOverlay.doneClearing");
 }
 
 }  // namespace options