chrome/browser/search/local_ntp_source.cc

   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/search/local_ntp_source.h"
   6
   7 #include "base/json/json_string_value_serializer.h"
   8 #include "base/logging.h"
   9 #include "base/memory/ref_counted_memory.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/strings/string_util.h"
  12 #include "base/strings/stringprintf.h"
  13 #include "base/values.h"
  14 #include "chrome/browser/search/instant_io_context.h"
  15 #include "chrome/browser/search/search.h"
  16 #include "chrome/browser/search_engines/template_url_prepopulate_data.h"
  17 #include "chrome/browser/search_engines/template_url_service.h"
  18 #include "chrome/browser/search_engines/template_url_service_factory.h"
  19 #include "chrome/common/url_constants.h"
  20 #include "grit/browser_resources.h"
  21 #include "grit/generated_resources.h"
  22 #include "grit/ui_resources.h"
  23 #include "net/url_request/url_request.h"
  24 #include "ui/base/l10n/l10n_util.h"
  25 #include "ui/base/resource/resource_bundle.h"
  26 #include "ui/base/webui/jstemplate_builder.h"
  27 #include "url/gurl.h"
  28
  29 namespace {
  30
  31 // Signifies a locally constructed resource, i.e. not from grit/.
  32 const int kLocalResource = -1;
  33
  34 const char kConfigDataFilename[] = "config.js";
  35
  36 const struct Resource{
  37   const char* filename;
  38   int identifier;
  39   const char* mime_type;
  40 } kResources[] = {
  41   { "local-ntp.html", IDR_LOCAL_NTP_HTML, "text/html" },
  42   { "local-ntp.js", IDR_LOCAL_NTP_JS, "application/javascript" },
  43   { kConfigDataFilename, kLocalResource, "application/javascript" },
  44   { "local-ntp.css", IDR_LOCAL_NTP_CSS, "text/css" },
  45   { "images/close_2.png", IDR_CLOSE_2, "image/png" },
  46   { "images/close_2_hover.png", IDR_CLOSE_2_H, "image/png" },
  47   { "images/close_2_active.png", IDR_CLOSE_2_P, "image/png" },
  48   { "images/close_2_white.png", IDR_CLOSE_2_MASK, "image/png" },
  49   { "images/2x/google_logo.png",
  50     IDR_LOCAL_NTP_IMAGES_2X_LOGO_PNG, "image/png" },
  51   { "images/2x/white_google_logo.png",
  52     IDR_LOCAL_NTP_IMAGES_2X_WHITE_LOGO_PNG, "image/png" },
  53 };
  54
  55 // Strips any query parameters from the specified path.
  56 std::string StripParameters(const std::string& path) {
  57   return path.substr(0, path.find("?"));
  58 }
  59
  60 bool DefaultSearchProviderIsGoogle(Profile* profile) {
  61   if (!profile)
  62     return false;
  63
  64   TemplateURLService* template_url_service =
  65       TemplateURLServiceFactory::GetForProfile(profile);
  66   if (!template_url_service)
  67     return false;
  68
  69   const TemplateURL* default_provider =
  70       template_url_service->GetDefaultSearchProvider();
  71   return default_provider &&
  72       (TemplateURLPrepopulateData::GetEngineType(*default_provider) ==
  73        SEARCH_ENGINE_GOOGLE);
  74 }
  75
  76 // Adds a localized string keyed by resource id to the dictionary.
  77 void AddString(base::DictionaryValue* dictionary,
  78                const std::string& key,
  79                int resource_id) {
  80   dictionary->SetString(key, l10n_util::GetStringUTF16(resource_id));
  81 }
  82
  83 // Populates |translated_strings| dictionary for the local NTP.
  84 scoped_ptr<base::DictionaryValue> GetTranslatedStrings() {
  85   scoped_ptr<base::DictionaryValue> translated_strings(
  86       new base::DictionaryValue());
  87
  88   AddString(translated_strings.get(), "thumbnailRemovedNotification",
  89             IDS_NEW_TAB_THUMBNAIL_REMOVED_NOTIFICATION);
  90   AddString(translated_strings.get(), "removeThumbnailTooltip",
  91             IDS_NEW_TAB_REMOVE_THUMBNAIL_TOOLTIP);
  92   AddString(translated_strings.get(), "undoThumbnailRemove",
  93             IDS_NEW_TAB_UNDO_THUMBNAIL_REMOVE);
  94   AddString(translated_strings.get(), "restoreThumbnailsShort",
  95             IDS_NEW_TAB_RESTORE_THUMBNAILS_SHORT_LINK);
  96   AddString(translated_strings.get(), "attributionIntro",
  97             IDS_NEW_TAB_ATTRIBUTION_INTRO);
  98   AddString(translated_strings.get(), "title", IDS_NEW_TAB_TITLE);
  99
 100   return translated_strings.Pass();
 101 }
 102
 103 // Returns a JS dictionary of configuration data for the local NTP.
 104 std::string GetConfigData(Profile* profile) {
 105   base::DictionaryValue config_data;
 106   config_data.Set("translatedStrings", GetTranslatedStrings().release());
 107   config_data.SetBoolean("isGooglePage",
 108                          DefaultSearchProviderIsGoogle(profile));
 109
 110   // Serialize the dictionary.
 111   std::string js_text;
 112   JSONStringValueSerializer serializer(&js_text);
 113   serializer.Serialize(config_data);
 114
 115   std::string config_data_js;
 116   config_data_js.append("var configData = ");
 117   config_data_js.append(js_text);
 118   config_data_js.append(";");
 119   return config_data_js;
 120 }
 121
 122 }  // namespace
 123
 124 LocalNtpSource::LocalNtpSource(Profile* profile) : profile_(profile) {
 125 }
 126
 127 LocalNtpSource::~LocalNtpSource() {
 128 }
 129
 130 std::string LocalNtpSource::GetSource() const {
 131   return chrome::kChromeSearchLocalNtpHost;
 132 }
 133
 134 void LocalNtpSource::StartDataRequest(
 135     const std::string& path,
 136     int render_process_id,
 137     int render_frame_id,
 138     const content::URLDataSource::GotDataCallback& callback) {
 139   const std::string stripped_path = StripParameters(path);
 140   if (stripped_path == kConfigDataFilename) {
 141     std::string config_data_js = GetConfigData(profile_);
 142     callback.Run(base::RefCountedString::TakeString(&config_data_js));
 143     return;
 144   }
 145   for (size_t i = 0; i < arraysize(kResources); ++i) {
 146     if (stripped_path == kResources[i].filename) {
 147       scoped_refptr<base::RefCountedStaticMemory> response(
 148           ResourceBundle::GetSharedInstance().LoadDataResourceBytes(
 149               kResources[i].identifier));
 150       callback.Run(response.get());
 151       return;
 152     }
 153   }
 154   callback.Run(NULL);
 155 };
 156
 157 std::string LocalNtpSource::GetMimeType(
 158     const std::string& path) const {
 159   const std::string stripped_path = StripParameters(path);
 160   for (size_t i = 0; i < arraysize(kResources); ++i) {
 161     if (stripped_path == kResources[i].filename)
 162       return kResources[i].mime_type;
 163   }
 164   return std::string();
 165 }
 166
 167 bool LocalNtpSource::ShouldServiceRequest(
 168     const net::URLRequest* request) const {
 169   DCHECK(request->url().host() == chrome::kChromeSearchLocalNtpHost);
 170   if (!InstantIOContext::ShouldServiceRequest(request))
 171     return false;
 172
 173   if (request->url().SchemeIs(chrome::kChromeSearchScheme)) {
 174     DCHECK(StartsWithASCII(request->url().path(), "/", true));
 175     std::string filename = request->url().path().substr(1);
 176     for (size_t i = 0; i < arraysize(kResources); ++i) {
 177       if (filename == kResources[i].filename)
 178         return true;
 179     }
 180   }
 181   return false;
 182 }
 183
 184 std::string LocalNtpSource::GetContentSecurityPolicyFrameSrc() const {
 185   // Allow embedding of most visited iframes.
 186   return base::StringPrintf("frame-src %s;",
 187                             chrome::kChromeSearchMostVisitedUrl);
 188 }