chrome/browser/bitmap_fetcher/bitmap_fetcher.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/bitmap_fetcher/bitmap_fetcher.h"
   6
   7 #include "content/public/browser/browser_thread.h"
   8 #include "net/url_request/url_fetcher.h"
   9 #include "net/url_request/url_request_context_getter.h"
  10 #include "net/url_request/url_request_status.h"
  11
  12 namespace chrome {
  13
  14 BitmapFetcher::BitmapFetcher(const GURL& url, BitmapFetcherDelegate* delegate)
  15     : url_(url),
  16       delegate_(delegate) {
  17 }
  18
  19 BitmapFetcher::~BitmapFetcher() {
  20 }
  21
  22 void BitmapFetcher::Init(net::URLRequestContextGetter* request_context,
  23                          const std::string& referrer,
  24                          net::URLRequest::ReferrerPolicy referrer_policy,
  25                          int load_flags) {
  26   if (url_fetcher_ != NULL)
  27     return;
  28
  29   url_fetcher_ = net::URLFetcher::Create(url_, net::URLFetcher::GET, this);
  30   url_fetcher_->SetRequestContext(request_context);
  31   url_fetcher_->SetReferrer(referrer);
  32   url_fetcher_->SetReferrerPolicy(referrer_policy);
  33   url_fetcher_->SetLoadFlags(load_flags);
  34 }
  35
  36 void BitmapFetcher::Start() {
  37   if (url_fetcher_)
  38     url_fetcher_->Start();
  39 }
  40
  41 // Methods inherited from URLFetcherDelegate.
  42
  43 void BitmapFetcher::OnURLFetchComplete(const net::URLFetcher* source) {
  44   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
  45
  46   if (source->GetStatus().status() != net::URLRequestStatus::SUCCESS) {
  47     ReportFailure();
  48     return;
  49   }
  50
  51   std::string image_data;
  52   source->GetResponseAsString(&image_data);
  53
  54   // Call start to begin decoding.  The ImageDecoder will call OnImageDecoded
  55   // with the data when it is done.
  56   ImageDecoder::Start(this, image_data);
  57 }
  58
  59 void BitmapFetcher::OnURLFetchDownloadProgress(const net::URLFetcher* source,
  60                                                int64 current,
  61                                                int64 total) {
  62   // Do nothing here.
  63 }
  64
  65 // Methods inherited from ImageDecoder::ImageRequest.
  66
  67 void BitmapFetcher::OnImageDecoded(const SkBitmap& decoded_image) {
  68   // Report success.
  69   delegate_->OnFetchComplete(url_, &decoded_image);
  70 }
  71
  72 void BitmapFetcher::OnDecodeImageFailed() {
  73   ReportFailure();
  74 }
  75
  76 void BitmapFetcher::ReportFailure() {
  77   delegate_->OnFetchComplete(url_, NULL);
  78 }
  79
  80 }  // namespace chrome