Page Speed Optimization Libraries
1.5.27.2
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00001 /* 00002 * Copyright 2011 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_META_TAG_FILTER_H_ 00023 #define NET_INSTAWEB_REWRITER_PUBLIC_META_TAG_FILTER_H_ 00024 00025 #include "net/instaweb/rewriter/public/common_filter.h" 00026 #include "net/instaweb/util/public/basictypes.h" 00027 00028 namespace net_instaweb { 00029 00030 class HtmlElement; 00031 class ResponseHeaders; 00032 class RewriteDriver; 00033 class Statistics; 00034 class Variable; 00035 00039 class MetaTagFilter : public CommonFilter { 00040 public: 00041 explicit MetaTagFilter(RewriteDriver* rewrite_driver); 00042 virtual ~MetaTagFilter(); 00043 00044 static void InitStats(Statistics* stats); 00045 00046 virtual void StartDocumentImpl(); 00047 virtual void StartElementImpl(HtmlElement* element) {} 00048 00056 virtual void EndElementImpl(HtmlElement* element); 00057 virtual void Flush(); 00058 00059 virtual const char* Name() const { return "ConvertMetaTags"; } 00060 00063 static bool ExtractAndUpdateMetaTagDetails( 00064 HtmlElement* element, 00065 ResponseHeaders* response_headers); 00066 00067 private: 00068 ResponseHeaders* response_headers_; 00069 00071 Variable* converted_meta_tag_count_; 00072 00073 DISALLOW_COPY_AND_ASSIGN(MetaTagFilter); 00074 }; 00075 00076 } 00077 00078 #endif ///< NET_INSTAWEB_REWRITER_PUBLIC_META_TAG_FILTER_H_