src/chrome/browser/android/logo_service.cc

   1 // Copyright 2014 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/android/logo_service.h"
   6
   7 #include "base/memory/weak_ptr.h"
   8 #include "chrome/browser/google/google_profile_helper.h"
   9 #include "chrome/browser/image_decoder.h"
  10 #include "chrome/browser/profiles/profile.h"
  11 #include "chrome/browser/search_engines/template_url_service_factory.h"
  12 #include "components/google/core/browser/google_url_tracker.h"
  13 #include "components/google/core/browser/google_util.h"
  14 #include "components/keyed_service/content/browser_context_dependency_manager.h"
  15 #include "components/search_engines/template_url_service.h"
  16 #include "components/search_provider_logos/google_logo_api.h"
  17 #include "content/public/browser/browser_thread.h"
  18 #include "net/url_request/url_request_context_getter.h"
  19
  20 using content::BrowserThread;
  21 using search_provider_logos::Logo;
  22 using search_provider_logos::LogoDelegate;
  23 using search_provider_logos::LogoTracker;
  24
  25 namespace {
  26
  27 const char kGoogleDoodleURLPath[] = "async/newtab_mobile";
  28 const char kCachedLogoDirectory[] = "Search Logo";
  29 const int kDecodeLogoTimeoutSeconds = 30;
  30
  31 // Returns the URL where the doodle can be downloaded, e.g.
  32 // https://www.google.com/async/newtab_mobile. This depends on the user's
  33 // Google domain.
  34 GURL GetGoogleDoodleURL(Profile* profile) {
  35   // SetPathStr() requires its argument to stay in scope as long as
  36   // |replacements| is, so a std::string is needed, instead of a char*.
  37   std::string path = kGoogleDoodleURLPath;
  38   GURL::Replacements replacements;
  39   replacements.SetPathStr(path);
  40
  41   GURL base_url(google_util::CommandLineGoogleBaseURL());
  42   if (!base_url.is_valid())
  43     base_url = google_profile_helper::GetGoogleHomePageURL(profile);
  44   return base_url.ReplaceComponents(replacements);
  45 }
  46
  47 class LogoDecoderDelegate : public ImageDecoder::Delegate {
  48  public:
  49   LogoDecoderDelegate(
  50       const scoped_refptr<ImageDecoder>& image_decoder,
  51       const base::Callback<void(const SkBitmap&)>& image_decoded_callback)
  52       : image_decoder_(image_decoder),
  53         image_decoded_callback_(image_decoded_callback),
  54         weak_ptr_factory_(this) {
  55     // If the ImageDecoder crashes or otherwise never completes, call
  56     // OnImageDecodeTimedOut() eventually to ensure that image_decoded_callback_
  57     // is run.
  58     base::MessageLoopProxy::current()->PostDelayedTask(
  59         FROM_HERE,
  60         base::Bind(&LogoDecoderDelegate::OnDecodeImageFailed,
  61                    weak_ptr_factory_.GetWeakPtr(),
  62                    (const ImageDecoder*) NULL),
  63         base::TimeDelta::FromSeconds(kDecodeLogoTimeoutSeconds));
  64   }
  65
  66   virtual ~LogoDecoderDelegate() {
  67     image_decoder_->set_delegate(NULL);
  68   }
  69
  70   // ImageDecoder::Delegate:
  71   virtual void OnImageDecoded(const ImageDecoder* decoder,
  72                               const SkBitmap& decoded_image) OVERRIDE {
  73     image_decoded_callback_.Run(decoded_image);
  74     delete this;
  75   }
  76
  77   virtual void OnDecodeImageFailed(const ImageDecoder* decoder) OVERRIDE {
  78     image_decoded_callback_.Run(SkBitmap());
  79     delete this;
  80   }
  81
  82  private:
  83   scoped_refptr<ImageDecoder> image_decoder_;
  84   base::Callback<void(const SkBitmap&)> image_decoded_callback_;
  85   base::WeakPtrFactory<LogoDecoderDelegate> weak_ptr_factory_;
  86
  87   DISALLOW_COPY_AND_ASSIGN(LogoDecoderDelegate);
  88 };
  89
  90 class ChromeLogoDelegate : public search_provider_logos::LogoDelegate {
  91  public:
  92   ChromeLogoDelegate() {}
  93   virtual ~ChromeLogoDelegate() {}
  94
  95   // search_provider_logos::LogoDelegate:
  96   virtual void DecodeUntrustedImage(
  97       const scoped_refptr<base::RefCountedString>& encoded_image,
  98       base::Callback<void(const SkBitmap&)> image_decoded_callback) OVERRIDE {
  99     scoped_refptr<ImageDecoder> image_decoder = new ImageDecoder(
 100         NULL,
 101         encoded_image->data(),
 102         ImageDecoder::DEFAULT_CODEC);
 103     LogoDecoderDelegate* delegate =
 104         new LogoDecoderDelegate(image_decoder, image_decoded_callback);
 105     image_decoder->set_delegate(delegate);
 106     image_decoder->Start(base::MessageLoopProxy::current());
 107   }
 108
 109  private:
 110   DISALLOW_COPY_AND_ASSIGN(ChromeLogoDelegate);
 111 };
 112
 113 }  // namespace
 114
 115 // LogoService ----------------------------------------------------------------
 116
 117 LogoService::LogoService(Profile* profile) : profile_(profile) {
 118 }
 119
 120 LogoService::~LogoService() {
 121 }
 122
 123 void LogoService::GetLogo(search_provider_logos::LogoObserver* observer) {
 124   TemplateURLService* template_url_service =
 125       TemplateURLServiceFactory::GetForProfile(profile_);
 126   if (!template_url_service)
 127     return;
 128
 129   TemplateURL* template_url = template_url_service->GetDefaultSearchProvider();
 130   if (!template_url || !template_url->url_ref().HasGoogleBaseURLs(
 131           template_url_service->search_terms_data()))
 132     return;
 133
 134   if (!logo_tracker_) {
 135     logo_tracker_.reset(new LogoTracker(
 136         profile_->GetPath().Append(kCachedLogoDirectory),
 137         BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE),
 138         BrowserThread::GetBlockingPool(),
 139         profile_->GetRequestContext(),
 140         scoped_ptr<search_provider_logos::LogoDelegate>(
 141             new ChromeLogoDelegate())));
 142   }
 143
 144   logo_tracker_->SetServerAPI(
 145       GetGoogleDoodleURL(profile_),
 146       base::Bind(&search_provider_logos::GoogleParseLogoResponse),
 147       base::Bind(&search_provider_logos::GoogleAppendFingerprintToLogoURL));
 148   logo_tracker_->GetLogo(observer);
 149 }
 150
 151 // LogoServiceFactory ---------------------------------------------------------
 152
 153 // static
 154 LogoService* LogoServiceFactory::GetForProfile(Profile* profile) {
 155   return static_cast<LogoService*>(
 156       GetInstance()->GetServiceForBrowserContext(profile, true));
 157 }
 158
 159 // static
 160 LogoServiceFactory* LogoServiceFactory::GetInstance() {
 161   return Singleton<LogoServiceFactory>::get();
 162 }
 163
 164 LogoServiceFactory::LogoServiceFactory()
 165     : BrowserContextKeyedServiceFactory(
 166           "LogoService",
 167           BrowserContextDependencyManager::GetInstance()) {
 168 }
 169
 170 LogoServiceFactory::~LogoServiceFactory() {}
 171
 172 KeyedService* LogoServiceFactory::BuildServiceInstanceFor(
 173     content::BrowserContext* context) const {
 174   Profile* profile = static_cast<Profile*>(context);
 175   DCHECK(!profile->IsOffTheRecord());
 176   return new LogoService(profile);
 177 }