Page Speed Optimization Libraries  1.7.30.2
net/instaweb/rewriter/public/collect_flush_early_content_filter.h
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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  */
00017 
00018 #ifndef NET_INSTAWEB_REWRITER_PUBLIC_COLLECT_FLUSH_EARLY_CONTENT_FILTER_H_
00019 #define NET_INSTAWEB_REWRITER_PUBLIC_COLLECT_FLUSH_EARLY_CONTENT_FILTER_H_
00020 
00021 #include "net/instaweb/htmlparse/public/html_name.h"
00022 #include "net/instaweb/http/public/semantic_type.h"
00023 #include "net/instaweb/rewriter/public/rewrite_filter.h"
00024 #include "net/instaweb/rewriter/public/rewrite_options.h"
00025 #include "net/instaweb/util/public/basictypes.h"
00026 #include "net/instaweb/util/public/string.h"
00027 #include "net/instaweb/util/public/string_util.h"
00028 
00029 namespace net_instaweb {
00030 
00031 class HtmlElement;
00032 class RewriteDriver;
00033 
00043 class CollectFlushEarlyContentFilter : public RewriteFilter {
00044  public:
00045   explicit CollectFlushEarlyContentFilter(RewriteDriver* driver);
00046 
00047   virtual void StartDocumentImpl();
00048   virtual void EndDocument();
00049   virtual void StartElementImpl(HtmlElement* element);
00050   virtual void EndElementImpl(HtmlElement* element);
00051 
00052   virtual const char* Name() const {
00053     return "Collect Flush Early Content Filter";
00054   }
00055   virtual const char* id() const {
00056     return RewriteOptions::kCollectFlushEarlyContentFilterId;
00057   }
00058 
00059  protected:
00060   virtual void Clear();
00061 
00062  private:
00063   class Context;
00064 
00065   void AppendToHtml(StringPiece url, semantic_type::Category category,
00066                     HtmlElement* element);
00067   void AppendAttribute(HtmlName::Keyword keyword, HtmlElement* element);
00069   virtual bool UsesPropertyCacheDomCohort() const { return true; }
00070 
00072   bool found_resource_;
00073   bool should_collect_critical_css_;
00074   GoogleString resource_html_; 
00075 
00076   DISALLOW_COPY_AND_ASSIGN(CollectFlushEarlyContentFilter);
00077 };
00078 
00079 }  
00080 
00081 #endif  ///< NET_INSTAWEB_REWRITER_PUBLIC_COLLECT_FLUSH_EARLY_CONTENT_FILTER_H_
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