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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_JSON_JSON_WRITER_H_
#define BASE_JSON_JSON_WRITER_H_
#pragma once
#include <string>
#include "base/basictypes.h"
class Value;
namespace base {
class JSONWriter {
public:
// Given a root node, generates a JSON string and puts it into |json|.
// If |pretty_print| is true, return a slightly nicer formated json string
// (pads with whitespace to help readability). If |pretty_print| is false,
// we try to generate as compact a string as possible.
// TODO(tc): Should we generate json if it would be invalid json (e.g.,
// |node| is not a DictionaryValue/ListValue or if there are inf/-inf float
// values)?
static void Write(const Value* const node, bool pretty_print,
std::string* json);
// Same as above, but has an option to not escape the string, preserving its
// UTF8 characters. It is useful if you can pass resulting string to the
// JSON parser in binary form (as UTF8).
static void WriteWithOptionalEscape(const Value* const node,
bool pretty_print,
bool escape,
std::string* json);
// A static, constant JSON string representing an empty array. Useful
// for empty JSON argument passing.
static const char* kEmptyArray;
private:
JSONWriter(bool pretty_print, std::string* json);
// Called recursively to build the JSON string. Whe completed, value is
// json_string_ will contain the JSON.
void BuildJSONString(const Value* const node, int depth, bool escape);
// Appends a quoted, escaped, version of (UTF-8) str to json_string_.
void AppendQuotedString(const std::string& str);
// Adds space to json_string_ for the indent level.
void IndentLine(int depth);
// Where we write JSON data as we generate it.
std::string* json_string_;
bool pretty_print_;
DISALLOW_COPY_AND_ASSIGN(JSONWriter);
};
} // namespace base
#endif // BASE_JSON_JSON_WRITER_H_
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