Page Speed Optimization Libraries  1.7.30.2
net/instaweb/rewriter/public/add_head_filter.h
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00001 /*
00002  * Copyright 2010 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_ADD_HEAD_FILTER_H_
00020 #define NET_INSTAWEB_REWRITER_PUBLIC_ADD_HEAD_FILTER_H_
00021 
00022 #include "net/instaweb/htmlparse/public/empty_html_filter.h"
00023 #include "net/instaweb/util/public/basictypes.h"
00024 
00025 namespace net_instaweb {
00026 class HtmlElement;
00027 class HtmlParse;
00028 
00032 class AddHeadFilter : public EmptyHtmlFilter {
00033  public:
00034   explicit AddHeadFilter(HtmlParse* parser, bool combine_multiple_heads);
00035   virtual ~AddHeadFilter();
00036 
00037   virtual void StartDocument();
00038   virtual void StartElement(HtmlElement* element);
00039   virtual void EndDocument();
00040   virtual void EndElement(HtmlElement* element);
00041   virtual void Flush();
00042   virtual const char* Name() const { return "AddHead"; }
00043 
00044  private:
00045   HtmlParse* html_parse_;
00046   bool combine_multiple_heads_;
00047   bool found_head_;
00048   HtmlElement* head_element_;
00049 
00050   DISALLOW_COPY_AND_ASSIGN(AddHeadFilter);
00051 };
00052 
00053 }  
00054 
00055 #endif  ///< NET_INSTAWEB_REWRITER_PUBLIC_ADD_HEAD_FILTER_H_
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