chrome/browser/ui/webui/ntp/ntp_resource_cache.cc

   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/ntp/ntp_resource_cache.h"
   6
   7 #include <string>
   8 #include <vector>
   9
  10 #include "base/command_line.h"
  11 #include "base/memory/ref_counted_memory.h"
  12 #include "base/prefs/pref_service.h"
  13 #include "base/strings/string16.h"
  14 #include "base/strings/string_number_conversions.h"
  15 #include "base/strings/stringprintf.h"
  16 #include "base/strings/utf_string_conversions.h"
  17 #include "base/values.h"
  18 #include "chrome/browser/browser_process.h"
  19 #include "chrome/browser/chrome_notification_types.h"
  20 #include "chrome/browser/first_run/first_run.h"
  21 #include "chrome/browser/google/google_util.h"
  22 #include "chrome/browser/policy/browser_policy_connector.h"
  23 #include "chrome/browser/profiles/profile.h"
  24 #include "chrome/browser/search/search.h"
  25 #include "chrome/browser/sync/profile_sync_service.h"
  26 #include "chrome/browser/sync/profile_sync_service_factory.h"
  27 #include "chrome/browser/themes/theme_properties.h"
  28 #include "chrome/browser/themes/theme_service.h"
  29 #include "chrome/browser/themes/theme_service_factory.h"
  30 #include "chrome/browser/ui/app_list/app_list_util.h"
  31 #include "chrome/browser/ui/bookmarks/bookmark_bar_constants.h"
  32 #include "chrome/browser/ui/sync/sync_promo_ui.h"
  33 #include "chrome/browser/ui/webui/ntp/new_tab_page_handler.h"
  34 #include "chrome/browser/ui/webui/ntp/new_tab_ui.h"
  35 #include "chrome/browser/ui/webui/ntp/ntp_login_handler.h"
  36 #include "chrome/browser/ui/webui/sync_setup_handler.h"
  37 #include "chrome/browser/web_resource/notification_promo.h"
  38 #include "chrome/common/chrome_switches.h"
  39 #include "chrome/common/extensions/extension_constants.h"
  40 #include "chrome/common/pref_names.h"
  41 #include "chrome/common/url_constants.h"
  42 #include "content/public/browser/browser_thread.h"
  43 #include "content/public/browser/notification_service.h"
  44 #include "content/public/browser/render_process_host.h"
  45 #include "extensions/common/extension.h"
  46 #include "grit/browser_resources.h"
  47 #include "grit/chromium_strings.h"
  48 #include "grit/generated_resources.h"
  49 #include "grit/locale_settings.h"
  50 #include "grit/theme_resources.h"
  51 #include "ui/base/l10n/l10n_util.h"
  52 #include "ui/base/resource/resource_bundle.h"
  53 #include "ui/base/theme_provider.h"
  54 #include "ui/base/webui/jstemplate_builder.h"
  55 #include "ui/base/webui/web_ui_util.h"
  56 #include "ui/gfx/animation/animation.h"
  57 #include "ui/gfx/color_utils.h"
  58 #include "ui/gfx/sys_color_change_listener.h"
  59
  60 #if defined(OS_CHROMEOS)
  61 #include "chromeos/chromeos_switches.h"
  62 #endif
  63
  64 #if defined(OS_MACOSX)
  65 #include "chrome/browser/platform_util.h"
  66 #endif
  67
  68 using content::BrowserThread;
  69
  70 namespace {
  71
  72 // The URL for the the Learn More page shown on incognito new tab.
  73 const char kLearnMoreIncognitoUrl[] =
  74 #if defined(OS_CHROMEOS)
  75     "https://www.google.com/support/chromeos/bin/answer.py?answer=95464";
  76 #else
  77     "https://www.google.com/support/chrome/bin/answer.py?answer=95464";
  78 #endif
  79
  80 // The URL for the Learn More page shown on guest session new tab.
  81 const char kLearnMoreGuestSessionUrl[] =
  82     "https://www.google.com/support/chromeos/bin/answer.py?answer=1057090";
  83
  84 base::string16 GetUrlWithLang(const GURL& url) {
  85   return base::ASCIIToUTF16(google_util::AppendGoogleLocaleParam(url).spec());
  86 }
  87
  88 std::string SkColorToRGBAString(SkColor color) {
  89   // We convert the alpha using DoubleToString because StringPrintf will use
  90   // locale specific formatters (e.g., use , instead of . in German).
  91   return base::StringPrintf(
  92       "rgba(%d,%d,%d,%s)",
  93       SkColorGetR(color),
  94       SkColorGetG(color),
  95       SkColorGetB(color),
  96       base::DoubleToString(SkColorGetA(color) / 255.0).c_str());
  97 }
  98
  99 // Creates an rgb string for an SkColor, but leaves the alpha blank so that the
 100 // css can fill it in.
 101 std::string SkColorToRGBComponents(SkColor color) {
 102   return base::StringPrintf(
 103       "%d,%d,%d",
 104       SkColorGetR(color),
 105       SkColorGetG(color),
 106       SkColorGetB(color));
 107 }
 108
 109 SkColor GetThemeColor(ui::ThemeProvider* tp, int id) {
 110   SkColor color = tp->GetColor(id);
 111   // If web contents are being inverted because the system is in high-contrast
 112   // mode, any system theme colors we use must be inverted too to cancel out.
 113   return gfx::IsInvertedColorScheme() ?
 114       color_utils::InvertColor(color) : color;
 115 }
 116
 117 // Get the CSS string for the background position on the new tab page for the
 118 // states when the bar is attached or detached.
 119 std::string GetNewTabBackgroundCSS(const ui::ThemeProvider* theme_provider,
 120                                    bool bar_attached) {
 121   // TODO(glen): This is a quick workaround to hide the notused.png image when
 122   // no image is provided - we don't have time right now to figure out why
 123   // this is painting as white.
 124   // http://crbug.com/17593
 125   if (!theme_provider->HasCustomImage(IDR_THEME_NTP_BACKGROUND)) {
 126     return "-64px";
 127   }
 128
 129   int alignment = theme_provider->GetDisplayProperty(
 130       ThemeProperties::NTP_BACKGROUND_ALIGNMENT);
 131
 132   if (bar_attached)
 133     return ThemeProperties::AlignmentToString(alignment);
 134
 135   if (alignment & ThemeProperties::ALIGN_TOP) {
 136     // The bar is detached, so we must offset the background by the bar size
 137     // if it's a top-aligned bar.
 138     int offset = chrome::kNTPBookmarkBarHeight;
 139
 140     if (alignment & ThemeProperties::ALIGN_LEFT)
 141       return "left " + base::IntToString(-offset) + "px";
 142     else if (alignment & ThemeProperties::ALIGN_RIGHT)
 143       return "right " + base::IntToString(-offset) + "px";
 144     return "center " + base::IntToString(-offset) + "px";
 145   }
 146
 147   return ThemeProperties::AlignmentToString(alignment);
 148 }
 149
 150 // How the background image on the new tab page should be tiled (see tiling
 151 // masks in theme_service.h).
 152 std::string GetNewTabBackgroundTilingCSS(
 153     const ui::ThemeProvider* theme_provider) {
 154   int repeat_mode = theme_provider->GetDisplayProperty(
 155       ThemeProperties::NTP_BACKGROUND_TILING);
 156   return ThemeProperties::TilingToString(repeat_mode);
 157 }
 158
 159 }  // namespace
 160
 161 NTPResourceCache::NTPResourceCache(Profile* profile)
 162     : profile_(profile), is_swipe_tracking_from_scroll_events_enabled_(false),
 163       should_show_apps_page_(NewTabUI::ShouldShowApps()),
 164       should_show_most_visited_page_(true),
 165       should_show_other_devices_menu_(true),
 166       should_show_recently_closed_menu_(true) {
 167   registrar_.Add(this, chrome::NOTIFICATION_BROWSER_THEME_CHANGED,
 168                  content::Source<ThemeService>(
 169                      ThemeServiceFactory::GetForProfile(profile)));
 170   registrar_.Add(this, chrome::NOTIFICATION_PROMO_RESOURCE_STATE_CHANGED,
 171                  content::NotificationService::AllSources());
 172
 173   base::Closure callback = base::Bind(&NTPResourceCache::OnPreferenceChanged,
 174                                       base::Unretained(this));
 175
 176   // Watch for pref changes that cause us to need to invalidate the HTML cache.
 177   profile_pref_change_registrar_.Init(profile_->GetPrefs());
 178   profile_pref_change_registrar_.Add(prefs::kSyncAcknowledgedSyncTypes,
 179                                      callback);
 180   profile_pref_change_registrar_.Add(prefs::kShowBookmarkBar, callback);
 181   profile_pref_change_registrar_.Add(prefs::kNtpShownPage, callback);
 182   profile_pref_change_registrar_.Add(prefs::kSignInPromoShowNTPBubble,
 183                                      callback);
 184   profile_pref_change_registrar_.Add(prefs::kHideWebStoreIcon, callback);
 185
 186   // Some tests don't have a local state.
 187 #if defined(ENABLE_APP_LIST)
 188   if (g_browser_process->local_state()) {
 189     local_state_pref_change_registrar_.Init(g_browser_process->local_state());
 190     local_state_pref_change_registrar_.Add(prefs::kShowAppLauncherPromo,
 191                                            callback);
 192     local_state_pref_change_registrar_.Add(
 193         prefs::kAppLauncherHasBeenEnabled, callback);
 194   }
 195 #endif
 196 }
 197
 198 NTPResourceCache::~NTPResourceCache() {}
 199
 200 bool NTPResourceCache::NewTabCacheNeedsRefresh() {
 201 #if defined(OS_MACOSX)
 202   // Invalidate if the current value is different from the cached value.
 203   bool is_enabled = platform_util::IsSwipeTrackingFromScrollEventsEnabled();
 204   if (is_enabled != is_swipe_tracking_from_scroll_events_enabled_) {
 205     is_swipe_tracking_from_scroll_events_enabled_ = is_enabled;
 206     return true;
 207   }
 208 #endif
 209   bool should_show_apps_page = NewTabUI::ShouldShowApps();
 210   if (should_show_apps_page != should_show_apps_page_) {
 211     should_show_apps_page_ = should_show_apps_page;
 212     return true;
 213   }
 214   return false;
 215 }
 216
 217 NTPResourceCache::WindowType NTPResourceCache::GetWindowType(
 218     Profile* profile, content::RenderProcessHost* render_host) {
 219   if (profile->IsGuestSession()) {
 220     return NTPResourceCache::GUEST;
 221   } else if (render_host) {
 222     // Sometimes the |profile| is the parent (non-incognito) version of the user
 223     // so we check the |render_host| if it is provided.
 224     if (render_host->GetBrowserContext()->IsOffTheRecord())
 225       return NTPResourceCache::INCOGNITO;
 226   } else if (profile->IsOffTheRecord()) {
 227     return NTPResourceCache::INCOGNITO;
 228   }
 229   return NTPResourceCache::NORMAL;
 230 }
 231
 232 base::RefCountedMemory* NTPResourceCache::GetNewTabHTML(WindowType win_type) {
 233   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 234   if (win_type == GUEST) {
 235     if (!new_tab_guest_html_.get())
 236       CreateNewTabGuestHTML();
 237     return new_tab_guest_html_.get();
 238   } else if (win_type == INCOGNITO) {
 239     if (!new_tab_incognito_html_.get())
 240       CreateNewTabIncognitoHTML();
 241     return new_tab_incognito_html_.get();
 242   } else {
 243     // Refresh the cached HTML if necessary.
 244     // NOTE: NewTabCacheNeedsRefresh() must be called every time the new tab
 245     // HTML is fetched, because it needs to initialize cached values.
 246     if (NewTabCacheNeedsRefresh() || !new_tab_html_.get())
 247       CreateNewTabHTML();
 248     return new_tab_html_.get();
 249   }
 250 }
 251
 252 base::RefCountedMemory* NTPResourceCache::GetNewTabCSS(WindowType win_type) {
 253   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 254   if (win_type == GUEST) {
 255     if (!new_tab_guest_css_.get())
 256       CreateNewTabGuestCSS();
 257     return new_tab_guest_css_.get();
 258   } else if (win_type == INCOGNITO) {
 259     if (!new_tab_incognito_css_.get())
 260       CreateNewTabIncognitoCSS();
 261     return new_tab_incognito_css_.get();
 262   } else {
 263     if (!new_tab_css_.get())
 264       CreateNewTabCSS();
 265     return new_tab_css_.get();
 266   }
 267 }
 268
 269 void NTPResourceCache::Observe(int type,
 270                                const content::NotificationSource& source,
 271                                const content::NotificationDetails& details) {
 272   // Invalidate the cache.
 273   if (chrome::NOTIFICATION_BROWSER_THEME_CHANGED == type ||
 274       chrome::NOTIFICATION_PROMO_RESOURCE_STATE_CHANGED == type) {
 275     new_tab_incognito_html_ = NULL;
 276     new_tab_html_ = NULL;
 277     new_tab_incognito_css_ = NULL;
 278     new_tab_css_ = NULL;
 279   } else {
 280     NOTREACHED();
 281   }
 282 }
 283
 284 void NTPResourceCache::OnPreferenceChanged() {
 285   // A change occurred to one of the preferences we care about, so flush the
 286   // cache.
 287   new_tab_incognito_html_ = NULL;
 288   new_tab_html_ = NULL;
 289   new_tab_css_ = NULL;
 290 }
 291
 292 void NTPResourceCache::CreateNewTabIncognitoHTML() {
 293   base::DictionaryValue localized_strings;
 294   localized_strings.SetString("title",
 295       l10n_util::GetStringUTF16(IDS_NEW_TAB_TITLE));
 296   int new_tab_message_ids = IDS_NEW_TAB_OTR_MESSAGE;
 297   int new_tab_html_idr = IDR_INCOGNITO_TAB_HTML;
 298   const char* new_tab_link = kLearnMoreIncognitoUrl;
 299   // TODO(altimofeev): consider implementation without 'if def' usage.
 300 #if defined(OS_CHROMEOS)
 301   if (CommandLine::ForCurrentProcess()->HasSwitch(
 302           chromeos::switches::kGuestSession)) {
 303     new_tab_message_ids = IDS_NEW_TAB_GUEST_SESSION_MESSAGE;
 304     new_tab_html_idr = IDR_GUEST_SESSION_TAB_HTML;
 305     new_tab_link = kLearnMoreGuestSessionUrl;
 306
 307     std::string enterprise_domain =
 308         g_browser_process->browser_policy_connector()->GetEnterpriseDomain();
 309     if (!enterprise_domain.empty()) {
 310       // Device is enterprise enrolled.
 311       localized_strings.SetString("enterpriseInfoVisible", "true");
 312       base::string16 enterprise_info = l10n_util::GetStringFUTF16(
 313           IDS_DEVICE_OWNED_BY_NOTICE,
 314           base::UTF8ToUTF16(enterprise_domain));
 315       localized_strings.SetString("enterpriseInfoMessage", enterprise_info);
 316       localized_strings.SetString("learnMore",
 317           l10n_util::GetStringUTF16(IDS_LEARN_MORE));
 318       localized_strings.SetString("enterpriseInfoHintLink",
 319           GetUrlWithLang(GURL(chrome::kLearnMoreEnterpriseURL)));
 320     } else {
 321       localized_strings.SetString("enterpriseInfoVisible", "false");
 322     }
 323   }
 324 #endif
 325   localized_strings.SetString("content",
 326       l10n_util::GetStringFUTF16(new_tab_message_ids,
 327                                  GetUrlWithLang(GURL(new_tab_link))));
 328   localized_strings.SetString("extensionsmessage",
 329       l10n_util::GetStringFUTF16(
 330           IDS_NEW_TAB_OTR_EXTENSIONS_MESSAGE,
 331           l10n_util::GetStringUTF16(IDS_PRODUCT_NAME),
 332           base::ASCIIToUTF16(chrome::kChromeUIExtensionsURL)));
 333   bool bookmark_bar_attached = profile_->GetPrefs()->GetBoolean(
 334       prefs::kShowBookmarkBar);
 335   localized_strings.SetBoolean("bookmarkbarattached", bookmark_bar_attached);
 336
 337   webui::SetFontAndTextDirection(&localized_strings);
 338
 339   static const base::StringPiece incognito_tab_html(
 340       ResourceBundle::GetSharedInstance().GetRawDataResource(
 341           new_tab_html_idr));
 342
 343   std::string full_html = webui::GetI18nTemplateHtml(
 344       incognito_tab_html, &localized_strings);
 345
 346   new_tab_incognito_html_ = base::RefCountedString::TakeString(&full_html);
 347 }
 348
 349 void NTPResourceCache::CreateNewTabGuestHTML() {
 350   base::DictionaryValue localized_strings;
 351   localized_strings.SetString("title",
 352       l10n_util::GetStringUTF16(IDS_NEW_TAB_TITLE));
 353   const char* new_tab_link = kLearnMoreGuestSessionUrl;
 354   localized_strings.SetString("content",
 355       l10n_util::GetStringFUTF16(IDS_NEW_TAB_GUEST_SESSION_MESSAGE,
 356                                  GetUrlWithLang(GURL(new_tab_link))));
 357
 358   webui::SetFontAndTextDirection(&localized_strings);
 359
 360   static const base::StringPiece guest_tab_html(
 361       ResourceBundle::GetSharedInstance().GetRawDataResource(
 362           IDR_GUEST_TAB_HTML));
 363
 364   std::string full_html = webui::GetI18nTemplateHtml(
 365       guest_tab_html, &localized_strings);
 366
 367   new_tab_guest_html_ = base::RefCountedString::TakeString(&full_html);
 368 }
 369
 370 void NTPResourceCache::CreateNewTabHTML() {
 371   // TODO(estade): these strings should be defined in their relevant handlers
 372   // (in GetLocalizedValues) and should have more legible names.
 373   // Show the profile name in the title and most visited labels if the current
 374   // profile is not the default.
 375   PrefService* prefs = profile_->GetPrefs();
 376   base::DictionaryValue load_time_data;
 377   load_time_data.SetBoolean("bookmarkbarattached",
 378       prefs->GetBoolean(prefs::kShowBookmarkBar));
 379   load_time_data.SetBoolean("hasattribution",
 380       ThemeServiceFactory::GetForProfile(profile_)->HasCustomImage(
 381           IDR_THEME_NTP_ATTRIBUTION));
 382   load_time_data.SetBoolean("showMostvisited", should_show_most_visited_page_);
 383   load_time_data.SetBoolean("showAppLauncherPromo",
 384       ShouldShowAppLauncherPromo());
 385   load_time_data.SetBoolean("showRecentlyClosed",
 386       should_show_recently_closed_menu_);
 387   load_time_data.SetString("title",
 388       l10n_util::GetStringUTF16(IDS_NEW_TAB_TITLE));
 389   load_time_data.SetString("mostvisited",
 390       l10n_util::GetStringUTF16(IDS_NEW_TAB_MOST_VISITED));
 391   load_time_data.SetString("suggestions",
 392       l10n_util::GetStringUTF16(IDS_NEW_TAB_SUGGESTIONS));
 393   load_time_data.SetString("restoreThumbnailsShort",
 394       l10n_util::GetStringUTF16(IDS_NEW_TAB_RESTORE_THUMBNAILS_SHORT_LINK));
 395   load_time_data.SetString("recentlyclosed",
 396       l10n_util::GetStringUTF16(IDS_NEW_TAB_RECENTLY_CLOSED));
 397   load_time_data.SetString("webStoreTitle",
 398       l10n_util::GetStringUTF16(IDS_EXTENSION_WEB_STORE_TITLE));
 399   load_time_data.SetString("webStoreTitleShort",
 400       l10n_util::GetStringUTF16(IDS_EXTENSION_WEB_STORE_TITLE_SHORT));
 401   load_time_data.SetString("closedwindowsingle",
 402       l10n_util::GetStringUTF16(IDS_NEW_TAB_RECENTLY_CLOSED_WINDOW_SINGLE));
 403   load_time_data.SetString("closedwindowmultiple",
 404       l10n_util::GetStringUTF16(IDS_NEW_TAB_RECENTLY_CLOSED_WINDOW_MULTIPLE));
 405   load_time_data.SetString("attributionintro",
 406       l10n_util::GetStringUTF16(IDS_NEW_TAB_ATTRIBUTION_INTRO));
 407   load_time_data.SetString("thumbnailremovednotification",
 408       l10n_util::GetStringUTF16(IDS_NEW_TAB_THUMBNAIL_REMOVED_NOTIFICATION));
 409   load_time_data.SetString("undothumbnailremove",
 410       l10n_util::GetStringUTF16(IDS_NEW_TAB_UNDO_THUMBNAIL_REMOVE));
 411   load_time_data.SetString("removethumbnailtooltip",
 412       l10n_util::GetStringUTF16(IDS_NEW_TAB_REMOVE_THUMBNAIL_TOOLTIP));
 413   load_time_data.SetString("appuninstall",
 414       l10n_util::GetStringUTF16(IDS_EXTENSIONS_UNINSTALL));
 415   load_time_data.SetString("appoptions",
 416       l10n_util::GetStringUTF16(IDS_NEW_TAB_APP_OPTIONS));
 417   load_time_data.SetString("appdetails",
 418       l10n_util::GetStringUTF16(IDS_NEW_TAB_APP_DETAILS));
 419   load_time_data.SetString("appcreateshortcut",
 420       l10n_util::GetStringUTF16(IDS_NEW_TAB_APP_CREATE_SHORTCUT));
 421   load_time_data.SetString("appDefaultPageName",
 422       l10n_util::GetStringUTF16(IDS_APP_DEFAULT_PAGE_NAME));
 423   load_time_data.SetString("applaunchtypepinned",
 424       l10n_util::GetStringUTF16(IDS_APP_CONTEXT_MENU_OPEN_PINNED));
 425   load_time_data.SetString("applaunchtyperegular",
 426       l10n_util::GetStringUTF16(IDS_APP_CONTEXT_MENU_OPEN_REGULAR));
 427   load_time_data.SetString("applaunchtypewindow",
 428       l10n_util::GetStringUTF16(IDS_APP_CONTEXT_MENU_OPEN_WINDOW));
 429   load_time_data.SetString("applaunchtypefullscreen",
 430       l10n_util::GetStringUTF16(IDS_APP_CONTEXT_MENU_OPEN_FULLSCREEN));
 431   load_time_data.SetString("syncpromotext",
 432       l10n_util::GetStringUTF16(IDS_SYNC_START_SYNC_BUTTON_LABEL));
 433   load_time_data.SetString("syncLinkText",
 434       l10n_util::GetStringUTF16(IDS_SYNC_ADVANCED_OPTIONS));
 435   load_time_data.SetBoolean("shouldShowSyncLogin",
 436                             NTPLoginHandler::ShouldShow(profile_));
 437   load_time_data.SetString("otherSessions",
 438       l10n_util::GetStringUTF16(IDS_NEW_TAB_OTHER_SESSIONS_LABEL));
 439   load_time_data.SetString("otherSessionsEmpty",
 440       l10n_util::GetStringUTF16(IDS_NEW_TAB_OTHER_SESSIONS_EMPTY));
 441   load_time_data.SetString("otherSessionsLearnMoreUrl",
 442       l10n_util::GetStringUTF16(IDS_NEW_TAB_OTHER_SESSIONS_LEARN_MORE_URL));
 443   load_time_data.SetString("learnMore",
 444       l10n_util::GetStringUTF16(IDS_LEARN_MORE));
 445   load_time_data.SetString("webStoreLink",
 446       GetUrlWithLang(GURL(extension_urls::GetWebstoreLaunchURL())));
 447   load_time_data.SetString("appInstallHintText",
 448       l10n_util::GetStringUTF16(IDS_NEW_TAB_APP_INSTALL_HINT_LABEL));
 449   load_time_data.SetBoolean("isDiscoveryInNTPEnabled",
 450       NewTabUI::IsDiscoveryInNTPEnabled());
 451   load_time_data.SetString("collapseSessionMenuItemText",
 452       l10n_util::GetStringUTF16(IDS_NEW_TAB_OTHER_SESSIONS_COLLAPSE_SESSION));
 453   load_time_data.SetString("expandSessionMenuItemText",
 454       l10n_util::GetStringUTF16(IDS_NEW_TAB_OTHER_SESSIONS_EXPAND_SESSION));
 455   load_time_data.SetString("restoreSessionMenuItemText",
 456       l10n_util::GetStringUTF16(IDS_NEW_TAB_OTHER_SESSIONS_OPEN_ALL));
 457   load_time_data.SetString("learn_more",
 458       l10n_util::GetStringUTF16(IDS_LEARN_MORE));
 459   load_time_data.SetString("tile_grid_screenreader_accessible_description",
 460       l10n_util::GetStringUTF16(IDS_NEW_TAB_TILE_GRID_ACCESSIBLE_DESCRIPTION));
 461   load_time_data.SetString("page_switcher_change_title",
 462       l10n_util::GetStringUTF16(IDS_NEW_TAB_PAGE_SWITCHER_CHANGE_TITLE));
 463   load_time_data.SetString("page_switcher_same_title",
 464       l10n_util::GetStringUTF16(IDS_NEW_TAB_PAGE_SWITCHER_SAME_TITLE));
 465   load_time_data.SetString("appsPromoTitle",
 466       l10n_util::GetStringUTF16(IDS_NEW_TAB_PAGE_APPS_PROMO_TITLE));
 467   // On Mac OS X 10.7+, horizontal scrolling can be treated as a back or
 468   // forward gesture. Pass through a flag that indicates whether or not that
 469   // feature is enabled.
 470   load_time_data.SetBoolean("isSwipeTrackingFromScrollEventsEnabled",
 471                             is_swipe_tracking_from_scroll_events_enabled_);
 472   // Managed users can not have apps installed currently so there's no need to
 473   // show the app cards.
 474   if (profile_->IsManaged())
 475     should_show_apps_page_ = false;
 476
 477   load_time_data.SetBoolean("showApps", should_show_apps_page_);
 478   load_time_data.SetBoolean("showWebStoreIcon",
 479                             !prefs->GetBoolean(prefs::kHideWebStoreIcon));
 480
 481   bool streamlined_hosted_apps = CommandLine::ForCurrentProcess()->HasSwitch(
 482       switches::kEnableStreamlinedHostedApps);
 483   load_time_data.SetBoolean("enableStreamlinedHostedApps",
 484                             streamlined_hosted_apps);
 485   // Use a different string for launching as a regular tab for streamlined
 486   // hosted apps.
 487   if (streamlined_hosted_apps) {
 488     load_time_data.SetString("applaunchtypetab",
 489         l10n_util::GetStringUTF16(IDS_APP_CONTEXT_MENU_OPEN_TAB));
 490   }
 491
 492 #if defined(OS_MACOSX)
 493   load_time_data.SetBoolean(
 494       "disableCreateAppShortcut",
 495       CommandLine::ForCurrentProcess()->HasSwitch(switches::kDisableAppShims));
 496 #endif
 497
 498 #if defined(OS_CHROMEOS)
 499   load_time_data.SetString("expandMenu",
 500       l10n_util::GetStringUTF16(IDS_NEW_TAB_CLOSE_MENU_EXPAND));
 501 #endif
 502
 503   NewTabPageHandler::GetLocalizedValues(profile_, &load_time_data);
 504   NTPLoginHandler::GetLocalizedValues(profile_, &load_time_data);
 505
 506   webui::SetFontAndTextDirection(&load_time_data);
 507
 508   // Control fade and resize animations.
 509   load_time_data.SetBoolean("anim",
 510                             gfx::Animation::ShouldRenderRichAnimation());
 511
 512   ui::ThemeProvider* tp = ThemeServiceFactory::GetForProfile(profile_);
 513   int alignment = tp->GetDisplayProperty(
 514       ThemeProperties::NTP_BACKGROUND_ALIGNMENT);
 515   load_time_data.SetString("themegravity",
 516       (alignment & ThemeProperties::ALIGN_RIGHT) ? "right" : "");
 517
 518   // Disable the promo if this is the first run, otherwise set the promo string
 519   // for display if there is a valid outstanding promo.
 520   if (first_run::IsChromeFirstRun()) {
 521     NotificationPromo::HandleClosed(NotificationPromo::NTP_NOTIFICATION_PROMO);
 522   } else {
 523     NotificationPromo notification_promo;
 524     notification_promo.InitFromPrefs(NotificationPromo::NTP_NOTIFICATION_PROMO);
 525     if (notification_promo.CanShow()) {
 526       load_time_data.SetString("notificationPromoText",
 527                                notification_promo.promo_text());
 528       DVLOG(1) << "Notification promo:" << notification_promo.promo_text();
 529     }
 530
 531     NotificationPromo bubble_promo;
 532     bubble_promo.InitFromPrefs(NotificationPromo::NTP_BUBBLE_PROMO);
 533     if (bubble_promo.CanShow()) {
 534       load_time_data.SetString("bubblePromoText",
 535                                bubble_promo.promo_text());
 536       DVLOG(1) << "Bubble promo:" << bubble_promo.promo_text();
 537     }
 538   }
 539
 540   // Determine whether to show the menu for accessing tabs on other devices.
 541   bool show_other_sessions_menu = should_show_other_devices_menu_ &&
 542       !CommandLine::ForCurrentProcess()->HasSwitch(
 543           switches::kDisableNTPOtherSessionsMenu);
 544   load_time_data.SetBoolean("showOtherSessionsMenu", show_other_sessions_menu);
 545   load_time_data.SetBoolean("isUserSignedIn",
 546       !prefs->GetString(prefs::kGoogleServicesUsername).empty());
 547
 548   // Load the new tab page appropriate for this build.
 549   base::StringPiece new_tab_html(ResourceBundle::GetSharedInstance().
 550       GetRawDataResource(IDR_NEW_TAB_4_HTML));
 551   webui::UseVersion2 version2;
 552   std::string full_html =
 553       webui::GetI18nTemplateHtml(new_tab_html, &load_time_data);
 554   new_tab_html_ = base::RefCountedString::TakeString(&full_html);
 555 }
 556
 557 void NTPResourceCache::CreateNewTabIncognitoCSS() {
 558   ui::ThemeProvider* tp = ThemeServiceFactory::GetForProfile(profile_);
 559   DCHECK(tp);
 560
 561   // Get our theme colors
 562   SkColor color_background =
 563       GetThemeColor(tp, ThemeProperties::COLOR_NTP_BACKGROUND);
 564
 565   // Generate the replacements.
 566   std::vector<std::string> subst;
 567
 568   // Cache-buster for background.
 569   subst.push_back(
 570       profile_->GetPrefs()->GetString(prefs::kCurrentThemeID));  // $1
 571
 572   // Colors.
 573   subst.push_back(SkColorToRGBAString(color_background));  // $2
 574   subst.push_back(GetNewTabBackgroundCSS(tp, false));  // $3
 575   subst.push_back(GetNewTabBackgroundCSS(tp, true));  // $4
 576   subst.push_back(GetNewTabBackgroundTilingCSS(tp));  // $5
 577
 578   // Get our template.
 579   static const base::StringPiece new_tab_theme_css(
 580       ResourceBundle::GetSharedInstance().GetRawDataResource(
 581           IDR_NEW_INCOGNITO_TAB_THEME_CSS));
 582
 583   // Create the string from our template and the replacements.
 584   std::string full_css = ReplaceStringPlaceholders(
 585       new_tab_theme_css, subst, NULL);
 586
 587   new_tab_incognito_css_ = base::RefCountedString::TakeString(&full_css);
 588 }
 589
 590 void NTPResourceCache::CreateNewTabGuestCSS() {
 591   ui::ThemeProvider* tp = ThemeServiceFactory::GetForProfile(profile_);
 592   DCHECK(tp);
 593
 594   // Get our theme colors
 595   SkColor color_background =
 596       GetThemeColor(tp, ThemeProperties::COLOR_NTP_BACKGROUND);
 597
 598   // Generate the replacements.
 599   std::vector<std::string> subst;
 600
 601   // Cache-buster for background.
 602   subst.push_back(
 603       profile_->GetPrefs()->GetString(prefs::kCurrentThemeID));  // $1
 604
 605   // Colors.
 606   subst.push_back(SkColorToRGBAString(color_background));  // $2
 607   subst.push_back(GetNewTabBackgroundCSS(tp, false));  // $3
 608   subst.push_back(GetNewTabBackgroundCSS(tp, true));  // $4
 609   subst.push_back(GetNewTabBackgroundTilingCSS(tp));  // $5
 610
 611   // Get our template.
 612   static const base::StringPiece new_tab_theme_css(
 613       ResourceBundle::GetSharedInstance().GetRawDataResource(
 614           IDR_NEW_GUEST_TAB_THEME_CSS));
 615
 616   // Create the string from our template and the replacements.
 617   std::string full_css = ReplaceStringPlaceholders(
 618       new_tab_theme_css, subst, NULL);
 619
 620   new_tab_guest_css_ = base::RefCountedString::TakeString(&full_css);
 621 }
 622
 623 void NTPResourceCache::CreateNewTabCSS() {
 624   ui::ThemeProvider* tp = ThemeServiceFactory::GetForProfile(profile_);
 625   DCHECK(tp);
 626
 627   // Get our theme colors
 628   SkColor color_background =
 629       GetThemeColor(tp, ThemeProperties::COLOR_NTP_BACKGROUND);
 630   SkColor color_text = GetThemeColor(tp, ThemeProperties::COLOR_NTP_TEXT);
 631   SkColor color_link = GetThemeColor(tp, ThemeProperties::COLOR_NTP_LINK);
 632   SkColor color_link_underline =
 633       GetThemeColor(tp, ThemeProperties::COLOR_NTP_LINK_UNDERLINE);
 634
 635   SkColor color_section =
 636       GetThemeColor(tp, ThemeProperties::COLOR_NTP_SECTION);
 637   SkColor color_section_text =
 638       GetThemeColor(tp, ThemeProperties::COLOR_NTP_SECTION_TEXT);
 639   SkColor color_section_link =
 640       GetThemeColor(tp, ThemeProperties::COLOR_NTP_SECTION_LINK);
 641   SkColor color_section_link_underline =
 642       GetThemeColor(tp, ThemeProperties::COLOR_NTP_SECTION_LINK_UNDERLINE);
 643   SkColor color_section_header_text =
 644       GetThemeColor(tp, ThemeProperties::COLOR_NTP_SECTION_HEADER_TEXT);
 645   SkColor color_section_header_text_hover =
 646       GetThemeColor(tp, ThemeProperties::COLOR_NTP_SECTION_HEADER_TEXT_HOVER);
 647   SkColor color_section_header_rule =
 648       GetThemeColor(tp, ThemeProperties::COLOR_NTP_SECTION_HEADER_RULE);
 649   SkColor color_section_header_rule_light =
 650       GetThemeColor(tp, ThemeProperties::COLOR_NTP_SECTION_HEADER_RULE_LIGHT);
 651   SkColor color_text_light =
 652       GetThemeColor(tp, ThemeProperties::COLOR_NTP_TEXT_LIGHT);
 653
 654   SkColor color_header =
 655       GetThemeColor(tp, ThemeProperties::COLOR_NTP_HEADER);
 656   // Generate a lighter color for the header gradients.
 657   color_utils::HSL header_lighter;
 658   color_utils::SkColorToHSL(color_header, &header_lighter);
 659   header_lighter.l += (1 - header_lighter.l) * 0.33;
 660   SkColor color_header_gradient_light =
 661       color_utils::HSLToSkColor(header_lighter, SkColorGetA(color_header));
 662
 663   // Generate section border color from the header color. See
 664   // BookmarkBarView::Paint for how we do this for the bookmark bar
 665   // borders.
 666   SkColor color_section_border =
 667       SkColorSetARGB(80,
 668                      SkColorGetR(color_header),
 669                      SkColorGetG(color_header),
 670                      SkColorGetB(color_header));
 671
 672   // Generate the replacements.
 673   std::vector<std::string> subst;
 674
 675   // Cache-buster for background.
 676   subst.push_back(
 677       profile_->GetPrefs()->GetString(prefs::kCurrentThemeID));  // $1
 678
 679   // Colors.
 680   subst.push_back(SkColorToRGBAString(color_background));  // $2
 681   subst.push_back(GetNewTabBackgroundCSS(tp, false));  // $3
 682   subst.push_back(GetNewTabBackgroundCSS(tp, true));  // $4
 683   subst.push_back(GetNewTabBackgroundTilingCSS(tp));  // $5
 684   subst.push_back(SkColorToRGBAString(color_header));  // $6
 685   subst.push_back(SkColorToRGBAString(color_header_gradient_light));  // $7
 686   subst.push_back(SkColorToRGBAString(color_text));  // $8
 687   subst.push_back(SkColorToRGBAString(color_link));  // $9
 688   subst.push_back(SkColorToRGBAString(color_section));  // $10
 689   subst.push_back(SkColorToRGBAString(color_section_border));  // $11
 690   subst.push_back(SkColorToRGBAString(color_section_text));  // $12
 691   subst.push_back(SkColorToRGBAString(color_section_link));  // $13
 692   subst.push_back(SkColorToRGBAString(color_link_underline));  // $14
 693   subst.push_back(SkColorToRGBAString(color_section_link_underline));  // $15
 694   subst.push_back(SkColorToRGBAString(color_section_header_text));  // $16
 695   subst.push_back(SkColorToRGBAString(
 696       color_section_header_text_hover));  // $17
 697   subst.push_back(SkColorToRGBAString(color_section_header_rule));  // $18
 698   subst.push_back(SkColorToRGBAString(
 699       color_section_header_rule_light));  // $19
 700   subst.push_back(SkColorToRGBAString(
 701       SkColorSetA(color_section_header_rule, 0)));  // $20
 702   subst.push_back(SkColorToRGBAString(color_text_light));  // $21
 703   subst.push_back(SkColorToRGBComponents(color_section_border));  // $22
 704   subst.push_back(SkColorToRGBComponents(color_text));  // $23
 705
 706   // Get our template.
 707   static const base::StringPiece new_tab_theme_css(
 708       ResourceBundle::GetSharedInstance().GetRawDataResource(
 709           IDR_NEW_TAB_4_THEME_CSS));
 710
 711   // Create the string from our template and the replacements.
 712   std::string css_string;
 713   css_string = ReplaceStringPlaceholders(new_tab_theme_css, subst, NULL);
 714   new_tab_css_ = base::RefCountedString::TakeString(&css_string);
 715 }