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1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef BASE_JSON_WRITER_H_ | |
6 #define BASE_JSON_WRITER_H_ | |
7 | |
8 #include <string> | |
9 | |
10 #include "base/basictypes.h" | |
11 | |
12 class Value; | |
13 | |
14 class JSONWriter { | |
15 public: | |
16 // Given a root node, generates a JSON string and puts it into |json|. | |
17 // If |pretty_print| is true, return a slightly nicer formated json string | |
18 // (pads with whitespace to help readability). If |pretty_print| is false, | |
19 // we try to generate as compact a string as possible. | |
20 // TODO(tc): Should we generate json if it would be invalid json (e.g., | |
21 // |node| is not a DictionaryValue/ListValue or if there are inf/-inf float | |
22 // values)? | |
23 static void Write(const Value* const node, bool pretty_print, | |
24 std::string* json); | |
25 | |
26 // Same as above, but has an option to not escape the string, preserving its | |
27 // UTF8 characters. It is useful if you can pass resulting string to the | |
28 // JSON parser in binary form (as UTF8). | |
29 static void WriteWithOptionalEscape(const Value* const node, | |
30 bool pretty_print, | |
31 bool escape, | |
32 std::string* json); | |
33 | |
34 private: | |
35 JSONWriter(bool pretty_print, std::string* json); | |
36 | |
37 // Called recursively to build the JSON string. Whe completed, value is | |
38 // json_string_ will contain the JSON. | |
39 void BuildJSONString(const Value* const node, int depth, bool escape); | |
40 | |
41 // Appends a quoted, escaped, version of str to json_string_. | |
42 void AppendQuotedString(const std::wstring& str); | |
43 | |
44 // Adds space to json_string_ for the indent level. | |
45 void IndentLine(int depth); | |
46 | |
47 // Where we write JSON data as we generate it. | |
48 std::string* json_string_; | |
49 | |
50 bool pretty_print_; | |
51 | |
52 DISALLOW_COPY_AND_ASSIGN(JSONWriter); | |
53 }; | |
54 | |
55 #endif // BASE_JSON_WRITER_H_ | |
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