Page Speed Optimization Libraries  1.5.27.2
net/instaweb/rewriter/public/flush_early_info_finder.h
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00001 /*
00002  * Copyright 2012 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 
00018 
00019 #ifndef NET_INSTAWEB_REWRITER_PUBLIC_FLUSH_EARLY_INFO_FINDER_H_
00020 #define NET_INSTAWEB_REWRITER_PUBLIC_FLUSH_EARLY_INFO_FINDER_H_
00021 
00022 #include "net/instaweb/util/public/basictypes.h"
00023 
00024 namespace net_instaweb {
00025 
00026 class FlushEarlyRenderInfo;
00027 class RewriteDriver;
00028 
00032 class FlushEarlyInfoFinder {
00033  public:
00034   static const char kFlushEarlyRenderPropertyName[];
00035 
00036   FlushEarlyInfoFinder() {}
00037   virtual ~FlushEarlyInfoFinder();
00038 
00043   virtual bool IsMeaningful(const RewriteDriver* driver) const {
00044     return false;
00045   }
00046 
00048   virtual void UpdateFlushEarlyInfoInDriver(RewriteDriver* driver);
00049 
00051   virtual void ComputeFlushEarlyInfo(RewriteDriver* driver);
00052 
00056   virtual const char* GetCharset(const RewriteDriver* driver);
00057 
00058   virtual const char* GetCohort() const = 0;
00059 
00060  protected:
00061   void UpdateFlushEarlyInfoCacheEntry(
00062       RewriteDriver* driver,
00063       FlushEarlyRenderInfo* flush_early_render_info);
00064 
00065  private:
00066   DISALLOW_COPY_AND_ASSIGN(FlushEarlyInfoFinder);
00067 };
00068 
00069 }  
00070 
00071 #endif  ///< NET_INSTAWEB_REWRITER_PUBLIC_FLUSH_EARLY_INFO_FINDER_H_
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