1 // Copyright (c) 2011 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/prerender/prerender_history.h" 6 7 #include "base/logging.h" 8 #include "base/strings/string_number_conversions.h" 9 #include "base/values.h" 10 11 namespace prerender { 12 13 PrerenderHistory::PrerenderHistory(size_t max_items) 14 : max_items_(max_items) { 15 DCHECK(max_items > 0); 16 } 17 18 PrerenderHistory::~PrerenderHistory() { 19 } 20 21 void PrerenderHistory::AddEntry(const Entry& entry) { 22 DCHECK(CalledOnValidThread()); 23 while (entries_.size() >= max_items_) 24 entries_.pop_front(); 25 entries_.push_back(entry); 26 } 27 28 void PrerenderHistory::Clear() { 29 entries_.clear(); 30 } 31 32 base::Value* PrerenderHistory::GetEntriesAsValue() const { 33 base::ListValue* return_list = new base::ListValue(); 34 // Javascript needs times in terms of milliseconds since Jan 1, 1970. 35 base::Time epoch_start = base::Time::UnixEpoch(); 36 for (std::list<Entry>::const_reverse_iterator it = entries_.rbegin(); 37 it != entries_.rend(); 38 ++it) { 39 const Entry& entry = *it; 40 base::DictionaryValue* entry_dict = new base::DictionaryValue(); 41 entry_dict->SetString("url", entry.url.spec()); 42 entry_dict->SetString("final_status", 43 NameFromFinalStatus(entry.final_status)); 44 entry_dict->SetString("origin", NameFromOrigin(entry.origin)); 45 // Use a string to prevent overflow, as Values don't support 64-bit 46 // integers. 47 entry_dict->SetString( 48 "end_time", 49 base::Int64ToString((entry.end_time - epoch_start).InMilliseconds())); 50 return_list->Append(entry_dict); 51 } 52 return return_list; 53 } 54 55 } // namespace prerender 56
