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/search/suggestions/thumbnail_manager.h" 6 7 #include "chrome/browser/profiles/profile.h" 8 #include "chrome/browser/search/suggestions/proto/suggestions.pb.h" 9 #include "content/public/browser/browser_thread.h" 10 #include "net/base/load_flags.h" 11 12 namespace suggestions { 13 14 ThumbnailManager::ThumbnailManager(Profile* profile) 15 : url_request_context_(profile->GetRequestContext()) {} 16 17 ThumbnailManager::~ThumbnailManager() {} 18 19 ThumbnailManager::ThumbnailRequest::ThumbnailRequest() : fetcher(NULL) {} 20 21 ThumbnailManager::ThumbnailRequest::ThumbnailRequest(chrome::BitmapFetcher* f) 22 : fetcher(f) {} 23 24 ThumbnailManager::ThumbnailRequest::~ThumbnailRequest() { 25 delete fetcher; 26 } 27 28 void ThumbnailManager::InitializeThumbnailMap( 29 const SuggestionsProfile& suggestions) { 30 thumbnail_map_.clear(); 31 for (int i = 0; i < suggestions.suggestions_size(); ++i) { 32 const ChromeSuggestion& suggestion = suggestions.suggestions(i); 33 if (suggestion.has_thumbnail()) { 34 thumbnail_map_[GURL(suggestion.url())] = GURL(suggestion.thumbnail()); 35 } 36 } 37 } 38 39 void ThumbnailManager::GetPageThumbnail( 40 const GURL& url, 41 base::Callback<void(const GURL&, const SkBitmap*)> callback) { 42 DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI)); 43 // If |url| is not found in |thumbnail_map_|, then invoke |callback| with NULL 44 // since there is no associated thumbnail. 45 GURL thumbnail_url; 46 if (!GetThumbnailURL(url, &thumbnail_url)) { 47 callback.Run(url, NULL); 48 return; 49 } 50 51 // Look for a request in progress for |thumbnail_url|. 52 ThumbnailRequestMap::iterator it = pending_requests_.find(thumbnail_url); 53 if (it == pending_requests_.end()) { 54 // |thumbnail_url| is not being fetched, so create a request and initiate 55 // the fetch. 56 ThumbnailRequest request(new chrome::BitmapFetcher(thumbnail_url, this)); 57 request.url = url; 58 request.callbacks.push_back(callback); 59 request.fetcher->Start( 60 url_request_context_, std::string(), 61 net::URLRequest::CLEAR_REFERRER_ON_TRANSITION_FROM_SECURE_TO_INSECURE, 62 net::LOAD_NORMAL); 63 pending_requests_[thumbnail_url].swap(&request); 64 } else { 65 // Request in progress. Register as an interested callback. 66 it->second.callbacks.push_back(callback); 67 } 68 } 69 70 void ThumbnailManager::OnFetchComplete(const GURL thumbnail_url, 71 const SkBitmap* bitmap) { 72 DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI)); 73 74 ThumbnailRequestMap::iterator it = pending_requests_.find(thumbnail_url); 75 DCHECK(it != pending_requests_.end()); 76 77 ThumbnailRequest* request = &it->second; 78 79 // Here |bitmap| could be NULL or a pointer to a bitmap which is owned by the 80 // BitmapFetcher and which ceases to exist after this function. Pass the 81 // un-owned pointer to the registered callbacks. 82 for (CallbackVector::iterator it = request->callbacks.begin(); 83 it != request->callbacks.end(); ++it) { 84 it->Run(request->url, bitmap); 85 } 86 pending_requests_.erase(it); 87 } 88 89 bool ThumbnailManager::GetThumbnailURL(const GURL& url, GURL* thumbnail_url) { 90 std::map<GURL, GURL>::iterator it = thumbnail_map_.find(url); 91 if (it == thumbnail_map_.end()) return false; // Not found. 92 *thumbnail_url = it->second; 93 return true; 94 } 95 96 } // namespace suggestions 97
