Page Speed Optimization Libraries  1.7.30.4
net/instaweb/rewriter/public/css_outline_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_CSS_OUTLINE_FILTER_H_
00020 #define NET_INSTAWEB_REWRITER_PUBLIC_CSS_OUTLINE_FILTER_H_
00021 
00022 #include <cstddef>
00023 
00024 #include "net/instaweb/rewriter/public/common_filter.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 HtmlCharactersNode;
00032 class HtmlElement;
00033 class MessageHandler;
00034 class OutputResource;
00035 class RewriteDriver;
00036 
00038 class CssOutlineFilter : public CommonFilter {
00039  public:
00040   static const char kFilterId[];
00041 
00042   explicit CssOutlineFilter(RewriteDriver* driver);
00043   virtual ~CssOutlineFilter();
00044 
00045   virtual void StartDocumentImpl();
00046 
00047   virtual void StartElementImpl(HtmlElement* element);
00048   virtual void EndElementImpl(HtmlElement* element);
00049 
00050   virtual void Flush();
00051 
00053   virtual void Characters(HtmlCharactersNode* characters);
00054 
00055   virtual const char* Name() const { return "OutlineCss"; }
00056 
00057  private:
00058   bool WriteResource(const StringPiece& content, OutputResource* resource,
00059                      MessageHandler* handler);
00060   void OutlineStyle(HtmlElement* element, const GoogleString& content);
00061 
00064   HtmlElement* inline_element_;
00066   HtmlCharactersNode* inline_chars_;
00067   size_t size_threshold_bytes_;
00069 
00070   DISALLOW_COPY_AND_ASSIGN(CssOutlineFilter);
00071 };
00072 
00073 }  
00074 
00075 #endif  ///< NET_INSTAWEB_REWRITER_PUBLIC_CSS_OUTLINE_FILTER_H_
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