Page Speed Optimization Libraries
1.8.31.2
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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 */ 00016 00018 00019 #ifndef NET_INSTAWEB_REWRITER_PUBLIC_COMPUTE_VISIBLE_TEXT_FILTER_H_ 00020 #define NET_INSTAWEB_REWRITER_PUBLIC_COMPUTE_VISIBLE_TEXT_FILTER_H_ 00021 00022 #include "net/instaweb/util/public/string_writer.h" 00023 #include "net/instaweb/htmlparse/public/html_writer_filter.h" 00024 #include "net/instaweb/util/public/basictypes.h" 00025 #include "net/instaweb/util/public/string.h" 00026 00027 namespace net_instaweb { 00028 00029 class HtmlCdataNode; 00030 class HtmlCharactersNode; 00031 class HtmlCommentNode; 00032 class HtmlDirectiveNode; 00033 class HtmlElement; 00034 class HtmlIEDirectiveNode; 00035 class RewriteDriver; 00036 00046 class ComputeVisibleTextFilter : public HtmlWriterFilter { 00047 public: 00048 explicit ComputeVisibleTextFilter(RewriteDriver* rewrite_driver); 00049 virtual ~ComputeVisibleTextFilter(); 00050 00051 virtual void StartDocument(); 00052 virtual void StartElement(HtmlElement* element); 00053 virtual void EndElement(HtmlElement* element); 00054 virtual void Cdata(HtmlCdataNode* cdata); 00055 virtual void Characters(HtmlCharactersNode* characters); 00056 virtual void Comment(HtmlCommentNode* comment); 00057 virtual void IEDirective(HtmlIEDirectiveNode* directive); 00058 virtual void Directive(HtmlDirectiveNode* directive); 00059 virtual void EndDocument(); 00060 virtual const char* Name() const { return "ComputeVisibleTextFilter"; } 00061 00062 private: 00063 RewriteDriver* rewrite_driver_; 00064 StringWriter writer_; 00065 GoogleString buffer_; 00066 00067 DISALLOW_COPY_AND_ASSIGN(ComputeVisibleTextFilter); 00068 }; 00069 00070 } 00071 00072 #endif ///< NET_INSTAWEB_REWRITER_PUBLIC_COMPUTE_VISIBLE_TEXT_FILTER_H_