Page Speed Optimization Libraries  1.7.30.4
net/instaweb/rewriter/public/critical_line_info_finder.h
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00001 /*
00002  * Copyright 2013 Google Inc.
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *      http:///www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00021 
00022 #ifndef NET_INSTAWEB_REWRITER_PUBLIC_CRITICAL_LINE_INFO_FINDER_H_
00023 #define NET_INSTAWEB_REWRITER_PUBLIC_CRITICAL_LINE_INFO_FINDER_H_
00024 
00025 #include "net/instaweb/rewriter/public/critical_finder_support_util.h"
00026 #include "net/instaweb/util/public/basictypes.h"
00027 #include "net/instaweb/util/public/property_cache.h"
00028 
00029 namespace net_instaweb {
00030 
00031 class CriticalLineInfo;
00032 class RewriteDriver;
00033 
00037 class CriticalLineInfoFinder {
00038  public:
00039   static const char kCriticalLineInfoPropertyName[];
00040 
00041   explicit CriticalLineInfoFinder(const PropertyCache::Cohort* cohort);
00042   virtual ~CriticalLineInfoFinder();
00043 
00045   const PropertyCache::Cohort* cohort() const { return cohort_; }
00046 
00048   virtual const CriticalLineInfo* GetCriticalLine(RewriteDriver* driver);
00049 
00054   virtual BeaconMetadata PrepareForBeaconInsertion(RewriteDriver* driver) {
00055     BeaconMetadata result;
00056     result.status = kBeaconNoNonce;
00057     return result;
00058   }
00059 
00060  protected:
00062   virtual void UpdateInDriver(RewriteDriver* driver);
00063 
00064  private:
00065   virtual int SupportInterval() const { return 1; }
00066 
00067   const PropertyCache::Cohort* cohort_;
00068 
00069   DISALLOW_COPY_AND_ASSIGN(CriticalLineInfoFinder);
00070 };
00071 
00072 }  
00073 
00074 #endif  ///< NET_INSTAWEB_REWRITER_PUBLIC_CRITICAL_LINE_INFO_FINDER_H_
00075 
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