Page Speed Optimization Libraries  1.5.27.2
net/instaweb/htmlparse/public/html_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_HTMLPARSE_PUBLIC_HTML_FILTER_H_
00020 #define NET_INSTAWEB_HTMLPARSE_PUBLIC_HTML_FILTER_H_
00021 
00022 namespace net_instaweb {
00023 
00024 class HtmlCdataNode;
00025 class HtmlCharactersNode;
00026 class HtmlCommentNode;
00027 class HtmlDirectiveNode;
00028 class HtmlElement;
00029 class HtmlIEDirectiveNode;
00030 
00033 class HtmlFilter {
00034  public:
00035   HtmlFilter();
00036   virtual ~HtmlFilter();
00037 
00040   virtual void StartDocument() = 0;
00042   virtual void EndDocument() = 0;
00043 
00050   virtual void StartElement(HtmlElement* element) = 0;
00051   virtual void EndElement(HtmlElement* element) = 0;
00052 
00054   virtual void Cdata(HtmlCdataNode* cdata) = 0;
00055 
00057   virtual void Comment(HtmlCommentNode* comment) = 0;
00058 
00064   virtual void IEDirective(HtmlIEDirectiveNode* directive) = 0;
00065 
00067   virtual void Characters(HtmlCharactersNode* characters) = 0;
00068 
00070   virtual void Directive(HtmlDirectiveNode* directive) = 0;
00071 
00081   virtual void Flush() = 0;
00082 
00089   virtual void RenderDone();
00090 
00093   virtual void DetermineEnabled() = 0;
00094 
00097   bool is_enabled() const { return is_enabled_; }
00098 
00100   virtual const char* Name() const = 0;
00101 
00102  protected:
00103   void set_is_enabled(bool is_enabled) { is_enabled_ = is_enabled; }
00104 
00105  private:
00106   bool is_enabled_;
00107 };
00108 
00109 }  
00110 
00111 #endif  ///< NET_INSTAWEB_HTMLPARSE_PUBLIC_HTML_FILTER_H_
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