Page Speed Optimization Libraries  1.7.30.4
net/instaweb/rewriter/public/split_html_helper_filter.h
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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_SPLIT_HTML_HELPER_FILTER_H_
00020 #define NET_INSTAWEB_REWRITER_PUBLIC_SPLIT_HTML_HELPER_FILTER_H_
00021 
00022 #include "base/logging.h"
00023 #include "net/instaweb/rewriter/public/common_filter.h"
00024 #include "net/instaweb/util/public/basictypes.h"
00025 #include "net/instaweb/util/public/scoped_ptr.h"
00026 #include "net/instaweb/util/public/string.h"
00027 
00028 namespace net_instaweb {
00029 
00030 class HtmlElement;
00031 class RewriteDriver;
00032 class SplitHtmlConfig;
00033 class SplitHtmlState;
00034 
00043 class SplitHtmlHelperFilter : public CommonFilter {
00044  public:
00045   explicit SplitHtmlHelperFilter(RewriteDriver* rewrite_driver);
00046   virtual ~SplitHtmlHelperFilter();
00047 
00048   virtual void DetermineEnabled();
00049 
00050   virtual void StartDocumentImpl();
00051   virtual void EndDocument();
00052 
00053   virtual void StartElementImpl(HtmlElement* element);
00054   virtual void EndElementImpl(HtmlElement* element);
00055 
00056   const HtmlElement* current_panel_element() const {
00057     return current_panel_element_;
00058   }
00059 
00060   void set_current_panel_element(const HtmlElement* element) {
00061     DCHECK(element == NULL || current_panel_element_ == NULL);
00062     current_panel_element_ = element;
00063   }
00064 
00065   virtual const char* Name() const { return "SplitHtmlHelperFilter"; }
00066 
00067  private:
00069   void EndPanelInstance();
00070 
00072   void StartPanelInstance(HtmlElement* element, const GoogleString& panelid);
00073 
00074   const SplitHtmlConfig* config_; 
00075 
00076   scoped_ptr<SplitHtmlState> state_;
00077 
00080   const HtmlElement* current_panel_element_;
00081 
00082   DISALLOW_COPY_AND_ASSIGN(SplitHtmlHelperFilter);
00083 };
00084 
00085 }  
00086 
00087 #endif  ///< NET_INSTAWEB_REWRITER_PUBLIC_SPLIT_HTML_HELPER_FILTER_H_
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