Page Speed Optimization Libraries  1.2.24.1
net/instaweb/rewriter/public/collapse_whitespace_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_COLLAPSE_WHITESPACE_FILTER_H_
00020 #define NET_INSTAWEB_REWRITER_PUBLIC_COLLAPSE_WHITESPACE_FILTER_H_
00021 
00022 #include <vector>
00023 
00024 #include "net/instaweb/htmlparse/public/empty_html_filter.h"
00025 #include "net/instaweb/htmlparse/public/html_name.h"
00026 #include "net/instaweb/util/public/basictypes.h"
00027 
00028 namespace net_instaweb {
00029 class HtmlParse;
00030 class HtmlElement;
00031 class HtmlCharactersNode;
00032 
00042 class CollapseWhitespaceFilter : public EmptyHtmlFilter {
00043  public:
00044   explicit CollapseWhitespaceFilter(HtmlParse* html_parse);
00045   virtual ~CollapseWhitespaceFilter();
00046 
00047   virtual void StartDocument();
00048   virtual void StartElement(HtmlElement* element);
00049   virtual void EndElement(HtmlElement* element);
00050   virtual void Characters(HtmlCharactersNode* characters);
00051   virtual const char* Name() const { return "CollapseWhitespace"; }
00052 
00053  private:
00054   HtmlParse* html_parse_;
00055   std::vector<HtmlName::Keyword> keyword_stack_;
00056 
00057   DISALLOW_COPY_AND_ASSIGN(CollapseWhitespaceFilter);
00058 };
00059 
00060 }  
00061 
00062 #endif  ///< NET_INSTAWEB_REWRITER_PUBLIC_COLLAPSE_WHITESPACE_FILTER_H_
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