Page Speed Optimization Libraries
1.7.30.1
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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_DEBUG_FILTER_H_ 00020 #define NET_INSTAWEB_REWRITER_PUBLIC_DEBUG_FILTER_H_ 00021 00022 #include "net/instaweb/htmlparse/public/empty_html_filter.h" 00023 #include "net/instaweb/util/public/basictypes.h" 00024 #include "net/instaweb/util/public/string.h" 00025 00026 namespace net_instaweb { 00027 00028 class HtmlElement; 00029 class RewriteDriver; 00030 class Timer; 00031 00035 class DebugFilter : public EmptyHtmlFilter { 00036 public: 00037 explicit DebugFilter(RewriteDriver* driver); 00038 virtual ~DebugFilter(); 00039 00040 virtual void EndDocument(); 00041 virtual void Flush(); 00042 00043 virtual const char* Name() const { return "Debug"; } 00044 00051 void InitParse(); 00052 void StartParse(); 00053 void EndParse(); 00054 void StartRender(); 00055 void EndRender(); 00056 00057 virtual void EndElement(HtmlElement* element); 00058 00064 static GoogleString FormatFlushMessage(int64 time_since_init_parse_us, 00065 int64 parse_duration_us, 00066 int64 flush_duration_us, 00067 int64 idle_duration_us); 00068 static GoogleString FormatEndDocumentMessage(int64 time_since_init_parse_us, 00069 int64 total_parse_duration_us, 00070 int64 total_flush_duration_us, 00071 int64 total_idle_duration_us, 00072 int num_flushes); 00073 00074 private: 00077 class Event { 00078 public: 00079 Event(); 00080 inline void Clear(); 00081 inline void Start(int64 now_us); 00082 inline void End(int64 now_us); 00083 inline void AddToTotal(); 00084 00085 int64 start_us() const { return start_us_; } 00086 int64 duration_us() const { return duration_us_; } 00087 int64 total_us() const { return total_us_; } 00088 00089 private: 00090 int64 start_us_; 00091 int64 duration_us_; 00092 int64 total_us_; 00093 }; 00094 00095 void Clear(); 00096 00097 RewriteDriver* driver_; 00098 Timer* timer_; 00099 bool end_document_seen_; 00100 int num_flushes_; 00101 int64 start_doc_time_us_; 00102 Event parse_; 00103 Event render_; 00104 Event idle_; 00105 00108 GoogleString flush_messages_; 00109 00110 DISALLOW_COPY_AND_ASSIGN(DebugFilter); 00111 }; 00112 00113 } 00114 00115 #endif ///< NET_INSTAWEB_REWRITER_PUBLIC_DEBUG_FILTER_H_