using System.Collections.Generic;
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using System.Text;
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namespace FastJSON
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{
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internal static class Formatter
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{
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public static string Indent = " ";
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public static void AppendIndent(StringBuilder sb, int count)
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{
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for (; count > 0; --count) sb.Append(Indent);
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}
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public static string PrettyPrint(string input)
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{
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var output = new StringBuilder();
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int depth = 0;
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int len = input.Length;
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char[] chars = input.ToCharArray();
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for (int i = 0; i < len; ++i)
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{
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char ch = chars[i];
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if (ch == '\"') // found string span
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{
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bool str = true;
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while (str)
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{
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output.Append(ch);
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ch = chars[++i];
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if (ch == '\\')
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{
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output.Append(ch);
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ch = chars[++i];
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}
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else if (ch == '\"')
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str = false;
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}
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}
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switch (ch)
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{
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case '{':
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case '[':
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output.Append(ch);
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output.AppendLine();
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AppendIndent(output, ++depth);
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break;
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case '}':
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case ']':
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output.AppendLine();
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AppendIndent(output, --depth);
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output.Append(ch);
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break;
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case ',':
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output.Append(ch);
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output.AppendLine();
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AppendIndent(output, depth);
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break;
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case ':':
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output.Append(" : ");
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break;
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default:
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if (!char.IsWhiteSpace(ch))
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output.Append(ch);
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break;
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}
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}
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return output.ToString();
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}
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}
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}
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