src/chrome/browser/ui/app_list/search/common/url_icon_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/ui/app_list/search/common/url_icon_source.h"
   6
   7 #include <string>
   8
   9 #include "content/public/browser/browser_thread.h"
  10 #include "net/base/load_flags.h"
  11 #include "net/url_request/url_fetcher.h"
  12 #include "net/url_request/url_request_status.h"
  13 #include "ui/base/resource/resource_bundle.h"
  14 #include "ui/gfx/image/image_skia_operations.h"
  15
  16 using content::BrowserThread;
  17
  18 namespace app_list {
  19
  20 UrlIconSource::UrlIconSource(
  21     const IconLoadedCallback& icon_loaded_callback,
  22     net::URLRequestContextGetter* context_getter,
  23     const GURL& icon_url,
  24     int icon_size,
  25     int default_icon_resource_id)
  26     : icon_loaded_callback_(icon_loaded_callback),
  27       context_getter_(context_getter),
  28       icon_url_(icon_url),
  29       icon_size_(icon_size),
  30       default_icon_resource_id_(default_icon_resource_id),
  31       icon_fetch_attempted_(false) {
  32   DCHECK(!icon_loaded_callback_.is_null());
  33 }
  34
  35 UrlIconSource::~UrlIconSource() {
  36   if (image_decoder_.get())
  37     image_decoder_->set_delegate(NULL);
  38 }
  39
  40 void UrlIconSource::StartIconFetch() {
  41   icon_fetch_attempted_ = true;
  42
  43   icon_fetcher_.reset(
  44       net::URLFetcher::Create(icon_url_, net::URLFetcher::GET, this));
  45   icon_fetcher_->SetRequestContext(context_getter_);
  46   icon_fetcher_->SetLoadFlags(net::LOAD_DO_NOT_SAVE_COOKIES);
  47   icon_fetcher_->Start();
  48 }
  49
  50 gfx::ImageSkiaRep UrlIconSource::GetImageForScale(float scale) {
  51   if (!icon_fetch_attempted_)
  52     StartIconFetch();
  53
  54   if (!icon_.isNull())
  55     return icon_.GetRepresentation(scale);
  56
  57   return ui::ResourceBundle::GetSharedInstance()
  58       .GetImageSkiaNamed(default_icon_resource_id_)->GetRepresentation(scale);
  59 }
  60
  61 void UrlIconSource::OnURLFetchComplete(
  62     const net::URLFetcher* source) {
  63   CHECK_EQ(icon_fetcher_.get(), source);
  64
  65   scoped_ptr<net::URLFetcher> fetcher(icon_fetcher_.Pass());
  66
  67   if (!fetcher->GetStatus().is_success() ||
  68       fetcher->GetResponseCode() != 200) {
  69     return;
  70   }
  71
  72   std::string unsafe_icon_data;
  73   fetcher->GetResponseAsString(&unsafe_icon_data);
  74
  75   image_decoder_ =
  76       new ImageDecoder(this, unsafe_icon_data, ImageDecoder::DEFAULT_CODEC);
  77   image_decoder_->Start(
  78       BrowserThread::GetMessageLoopProxyForThread(BrowserThread::UI));
  79 }
  80
  81 void UrlIconSource::OnImageDecoded(const ImageDecoder* decoder,
  82                                    const SkBitmap& decoded_image) {
  83   icon_ = gfx::ImageSkiaOperations::CreateResizedImage(
  84       gfx::ImageSkia::CreateFrom1xBitmap(decoded_image),
  85       skia::ImageOperations::RESIZE_BEST,
  86       gfx::Size(icon_size_, icon_size_));
  87
  88   icon_loaded_callback_.Run();
  89 }
  90
  91 void UrlIconSource::OnDecodeImageFailed(
  92     const ImageDecoder* decoder) {
  93   // Failed to decode image. Do nothing and just use the default icon.
  94 }
  95
  96 }  // namespace app_list