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Add Luaon.Json project.
Add JsonLuaWriter.
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6 files changed

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-20
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6 files changed

+516
-20
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‎Luaon.Json/JsonLuaWriter.cs‎

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using System;
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using System.Diagnostics;
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using System.IO;
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using Newtonsoft.Json;
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namespace Luaon.Json
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{
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/// <summary>
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/// A writer that accepts JSON tokens but outputs Lua table expression.
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/// </summary>
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public class JsonLuaWriter : JsonWriter
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{
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private readonly TextWriter writer;
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private int _MaxUnquotedNameLength = 64;
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private int _Indentation = 2;
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private char _IndentChar;
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private int nestedLevel = 0;
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private char[] currentIdentation;
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private string currentIdentationNewLine;
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public JsonLuaWriter(TextWriter writer)
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{
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this.writer = writer ?? throw new ArgumentNullException(nameof(writer));
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_Indentation = 2;
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_IndentChar = ' ';
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}
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/// <summary>
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/// Gets/sets the maximum allowed table field name that will be checked for chance of
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/// using <c>Name = </c> expression instad of <c>["key"] = </c>, to reduce the
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/// generated code length and improve redability.
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/// </summary>
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/// <value>A positive value, or <c>0</c> to disable this feature.</value>
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/// <remarks>The default value is <c>64</c>.</remarks>
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public int MaxUnquotedNameLength
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{
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get { return _MaxUnquotedNameLength; }
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set
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{
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if (value < 0) throw new ArgumentOutOfRangeException(nameof(value));
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_MaxUnquotedNameLength = value;
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}
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}
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/// <summary>
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/// Gets or sets how many <see cref="IndentChar"/>s to write for each level in the hierarchy
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/// when <see cref="Formatting"/> is set to <see cref="Formatting.Prettified"/>.
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/// </summary>
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public int Indentation
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{
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get { return _Indentation; }
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set
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{
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if (value < 0) throw new ArgumentOutOfRangeException(nameof(value));
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if (_Indentation != value)
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{
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_Indentation = value;
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currentIdentation = null;
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}
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}
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}
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/// <summary>
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/// Gets/sets which character to use for indenting
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/// when <see cref="Formatting"/> is set to <see cref="Formatting.Prettified"/>.
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/// </summary>
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public char IndentChar
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{
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get { return _IndentChar; }
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set
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{
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if (_Indentation != value)
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{
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_IndentChar = value;
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currentIdentation = null;
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}
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}
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}
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/// <inheritdoc />
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public override void WriteStartArray()
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{
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base.WriteStartArray();
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nestedLevel++;
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writer.Write('{');
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}
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/// <inheritdoc />
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public override void WriteEndArray()
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{
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nestedLevel--;
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Debug.Assert(nestedLevel >= 0);
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base.WriteEndArray();
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}
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/// <inheritdoc />
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public override void WriteStartObject()
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{
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base.WriteStartObject();
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nestedLevel++;
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writer.Write('{');
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}
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/// <inheritdoc />
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public override void WriteEndObject()
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{
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nestedLevel--;
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Debug.Assert(nestedLevel >= 0);
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base.WriteEndObject();
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}
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/// <inheritdoc />
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public override void WriteStartConstructor(string name)
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{
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throw new NotSupportedException();
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//base.WriteStartConstructor(name);
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}
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/// <inheritdoc />
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public override void WriteEndConstructor()
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{
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throw new NotSupportedException();
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//base.WriteEndConstructor();
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}
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/// <inheritdoc />
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protected override void WriteEnd(JsonToken token)
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{
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switch (token)
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{
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case JsonToken.EndObject:
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case JsonToken.EndArray:
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writer.Write('}');
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break;
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default:
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throw new NotSupportedException();
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}
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}
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/// <inheritdoc />
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public override void WritePropertyName(string name)
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{
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base.WritePropertyName(name);
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if (name.Length > 0 && name.Length < _MaxUnquotedNameLength && LuaConvert.IsValidIdentifier(name))
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{
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writer.Write(name);
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}
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else
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{
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writer.Write('[');
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writer.Write(LuaConvert.ToString(name));
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writer.Write(']');
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}
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if (Formatting == Newtonsoft.Json.Formatting.Indented)
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writer.Write(" ="); // base class will insert a space after =
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else
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writer.Write('=');
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}
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/// <inheritdoc />
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protected override void WriteIndent()
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{
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var indentCount = nestedLevel * Indentation;
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if (currentIdentation == null || currentIdentation.Length - currentIdentationNewLine.Length < indentCount)
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{
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var newLine = writer.NewLine;
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var chars = new char[newLine.Length + indentCount];
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newLine.CopyTo(0, chars, 0, newLine.Length);
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for (int i = newLine.Length; i < chars.Length; i++) chars[i] = _IndentChar;
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currentIdentation = chars;
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currentIdentationNewLine = newLine;
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}
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writer.Write(currentIdentation, 0, currentIdentationNewLine.Length + indentCount);
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}
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/// <inheritdoc />
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protected override void WriteValueDelimiter()
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{
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writer.Write(',');
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}
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/// <inheritdoc />
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protected override void WriteIndentSpace()
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{
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writer.Write(' ');
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}
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#region WriteValue methods
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/// <inheritdoc />
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public override void WriteNull()
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{
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base.WriteNull();
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writer.Write(LuaConvert.Nil);
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}
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public override void WriteUndefined()
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{
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throw new NotSupportedException();
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//base.WriteUndefined();
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}
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/// <inheritdoc />
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public override void WriteRaw(string json)
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{
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// Actually, this should be Lua
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base.WriteRaw(json);
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writer.Write(json);
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}
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/// <inheritdoc />
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public override void WriteValue(string value)
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{
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base.WriteValue(value);
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if (value == null)
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writer.Write(LuaConvert.Nil);
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else
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writer.Write(LuaConvert.ToString(value));
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}
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/// <inheritdoc />
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public override void WriteValue(bool value)
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{
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base.WriteValue(value);
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writer.Write(LuaConvert.ToString(value));
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}
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/// <inheritdoc />
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public override void WriteValue(char value)
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{
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base.WriteValue(value);
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writer.Write(LuaConvert.ToString(value));
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}
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/// <inheritdoc />
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public override void WriteValue(byte value)
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{
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base.WriteValue(value);
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writer.Write(LuaConvert.ToString(value));
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}
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/// <inheritdoc />
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public override void WriteValue(sbyte value)
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{
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base.WriteValue(value);
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writer.Write(LuaConvert.ToString(value));
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}
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/// <inheritdoc />
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public override void WriteValue(short value)
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{
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base.WriteValue(value);
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writer.Write(LuaConvert.ToString(value));
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}
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/// <inheritdoc />
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public override void WriteValue(ushort value)
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{
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base.WriteValue(value);
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writer.Write(LuaConvert.ToString(value));
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}
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/// <inheritdoc />
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public override void WriteValue(int value)
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{
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base.WriteValue(value);
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writer.Write(LuaConvert.ToString(value));
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}
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/// <inheritdoc />
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public override void WriteValue(uint value)
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{
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base.WriteValue(value);
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writer.Write(LuaConvert.ToString(value));
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}
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/// <inheritdoc />
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public override void WriteValue(long value)
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{
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base.WriteValue(value);
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writer.Write(LuaConvert.ToString(value));
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}
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/// <inheritdoc />
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public override void WriteValue(ulong value)
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{
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base.WriteValue(value);
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writer.Write(LuaConvert.ToString(value));
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}
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/// <inheritdoc />
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public override void WriteValue(float value)
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{
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base.WriteValue(value);
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writer.Write(LuaConvert.ToString(value));
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}
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/// <inheritdoc />
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public override void WriteValue(double value)
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{
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base.WriteValue(value);
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writer.Write(LuaConvert.ToString(value));
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}
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/// <inheritdoc />
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public override void WriteValue(decimal value)
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{
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base.WriteValue(value);
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writer.Write(LuaConvert.ToString(value));
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}
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/// <inheritdoc />
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public override void WriteValue(DateTime value)
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{
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base.WriteValue(value);
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writer.Write(LuaConvert.ToString(value));
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}
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/// <inheritdoc />
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public override void WriteValue(DateTimeOffset value)
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{
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base.WriteValue(value);
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writer.Write(LuaConvert.ToString(value));
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}
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/// <inheritdoc />
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public override void WriteValue(byte[] value)
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{
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base.WriteValue(value);
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writer.Write('"');
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writer.Write(Convert.ToBase64String(value));
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writer.Write('"');
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}
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/// <inheritdoc />
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public override void WriteValue(Guid value)
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{
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base.WriteValue(value);
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writer.Write(LuaConvert.ToString(value.ToString("D")));
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}
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/// <inheritdoc />
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public override void WriteValue(TimeSpan value)
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{
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base.WriteValue(value);
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writer.Write(LuaConvert.ToString(value));
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}
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/// <inheritdoc />
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public override void WriteValue(Uri value)
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{
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base.WriteValue(value);
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if (value == null)
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writer.Write(LuaConvert.Nil);
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else
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writer.Write(LuaConvert.ToString(value));
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}
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#endregion
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/// <inheritdoc />
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public override void Flush()
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{
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writer.Flush();
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}
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/// <inheritdoc />
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protected override void Dispose(bool disposing)
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{
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if (disposing)
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{
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if (CloseOutput) writer.Dispose();
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}
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base.Dispose(disposing);
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}
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}
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}

‎Luaon.Json/Luaon.Json.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFrameworks>netstandard1.1;netstandard2.0</TargetFrameworks>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Newtonsoft.Json" Version="10.0.3" />
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</ItemGroup>
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<ItemGroup>
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<ProjectReference Include="..\Luaon.NET\Luaon.NET.csproj" />
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</ItemGroup>
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</Project>

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