Page Speed Optimization Libraries
1.7.30.1
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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 00018 00019 #ifndef NET_INSTAWEB_REWRITER_PUBLIC_CRITICAL_CSS_FINDER_H_ 00020 #define NET_INSTAWEB_REWRITER_PUBLIC_CRITICAL_CSS_FINDER_H_ 00021 00022 #include "net/instaweb/util/public/basictypes.h" 00023 #include "net/instaweb/util/public/property_cache.h" 00024 00025 namespace net_instaweb { 00026 00027 class CriticalCssResult; 00028 class RewriteDriver; 00029 class Statistics; 00030 class TimedVariable; 00031 00033 class CriticalCssFinder { 00034 public: 00035 static const char kCriticalCssValidCount[]; 00036 static const char kCriticalCssExpiredCount[]; 00037 static const char kCriticalCssNotFoundCount[]; 00038 static const char kCriticalCssPropertyName[]; 00039 00040 CriticalCssFinder(const PropertyCache::Cohort* cohort, Statistics* stats); 00041 virtual ~CriticalCssFinder(); 00042 00043 static void InitStats(Statistics* statistics); 00044 00047 virtual CriticalCssResult* GetCriticalCssFromCache(RewriteDriver* driver); 00048 00050 virtual void ComputeCriticalCss(RewriteDriver* driver) = 0; 00051 00053 virtual bool UpdateCache(RewriteDriver* driver, 00054 const CriticalCssResult& result); 00055 00059 virtual void UpdateCriticalCssInfoInDriver(RewriteDriver* driver); 00060 00065 virtual CriticalCssResult* GetCriticalCss(RewriteDriver* driver); 00066 00067 const PropertyCache::Cohort* cohort() const { return cohort_; } 00068 00069 private: 00070 const PropertyCache::Cohort* cohort_; 00071 TimedVariable* critical_css_valid_count_; 00072 TimedVariable* critical_css_expired_count_; 00073 TimedVariable* critical_css_not_found_count_; 00074 00075 DISALLOW_COPY_AND_ASSIGN(CriticalCssFinder); 00076 }; 00077 00078 } 00079 00080 #endif ///< NET_INSTAWEB_REWRITER_PUBLIC_CRITICAL_CSS_FINDER_H_