Page Speed Optimization Libraries
1.5.27.2
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00001 /* 00002 * Copyright 2011 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_UTIL_PUBLIC_JSON_WRITER_H_ 00020 #define NET_INSTAWEB_UTIL_PUBLIC_JSON_WRITER_H_ 00021 00022 #include <utility> 00023 #include <vector> 00024 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 #include "net/instaweb/util/public/writer.h" 00029 00030 namespace Json { 00031 class Value; 00032 } 00033 00034 namespace net_instaweb { 00035 00036 static const char kInstanceHtml[] = "instance_html"; 00037 00038 class HtmlElement; 00039 class MessageHandler; 00040 00042 typedef std::pair<HtmlElement*, Json::Value*> ElementJsonPair; 00043 00045 class JsonWriter : public Writer { 00046 public: 00049 JsonWriter(Writer* writer, 00050 const std::vector<ElementJsonPair>* element_json_stack); 00051 virtual ~JsonWriter(); 00052 00053 virtual bool Write(const StringPiece& str, MessageHandler* message_handler); 00054 virtual bool Flush(MessageHandler* message_handler); 00056 void UpdateDictionary(); 00057 00058 private: 00059 Writer* writer_; 00060 GoogleString buffer_; 00061 const std::vector<ElementJsonPair>* element_json_stack_; 00062 00063 DISALLOW_COPY_AND_ASSIGN(JsonWriter); 00064 }; 00065 00066 } 00067 00068 #endif ///< NET_INSTAWEB_UTIL_PUBLIC_JSON_WRITER_H_