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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using JSCompiler.Core;
namespace JSCompiler.SyntaxHighlighter
{
public static class SyntaxHighlighter
{
private static readonly string HTML =
@"<!DOCTYPE html>
<html>
<head>
{0}
<title> {1} </title>
</head>
<body> {2} </body></html>";
private static readonly string DEFAULT_CSS =
@"<style>
body {
font-size: 20px;
font-family: ""Verdana"";
}
.number {
color: Orange;
}
.string {
color: Gray;
white-space: pre-wrap;
}
.keyword {
color: Blue;
}
.identifier {
color: Black;
}
.operator {
color: DarkBlue;
}
.comment {
color: Green;
font-style: italic;
white-space: pre-wrap;
}
.reserved {
color: MediumVioletRed;
}
.undefined{
color: Black;
}
.default {
color: DarkBlue;
}
</style>";
private static IEnumerable<TokenType> KEYWORDS = ReservedStrings.KeywordsAsMap().Values;
private static IEnumerable<TokenType> OTHER_RESERVED = ReservedStrings.OthersAsMap().Values;
private static IEnumerable<TokenType> ONE_SYMBOL_OPERATORS = new List<TokenType>
{
TokenType.Minus, // -
TokenType.Plus, // +
TokenType.Star, // *
TokenType.Division, // /
TokenType.Modulo, // %
TokenType.BitwiseNot, // ~
TokenType.BitwiseAnd, // &
TokenType.BitwiseXor, // ^
TokenType.BitwiseOr, // |
TokenType.QuestionMark, // ?
TokenType.Bang, // !
TokenType.Equal, // =
TokenType.Greater, // >
TokenType.Less, // <
TokenType.Backslash, // \
};
private static IEnumerable<TokenType> MULT_SYMBOL_OPERATORS = new List<TokenType>
{
TokenType.NotEqual, // !=
TokenType.EqualEqual, // ==
TokenType.StrictEqual, // ===
TokenType.StrictNotEqual, // !==
TokenType.GreaterEqual, // >=
TokenType.LessEqual, // <=
TokenType.MinusMinus, // --
TokenType.PlusPlus, // ++
TokenType.LeftShift, // <<
TokenType.RightShift, // >>
TokenType.LogicalAnd, // &&
TokenType.LogicalOr, // ||
TokenType.StarEqual, // *=
TokenType.DivideEqual, // /=
TokenType.ModuloEqual, // %=
TokenType.PlusEqual, // +=
TokenType.MinusEqual, // -=
TokenType.LeftShiftEqual, // <<=
TokenType.RightShiftEqual, // >>=
TokenType.BitwiseAndEqual, // &=
TokenType.BitwiseXorEqual, // ^=
TokenType.BitwiseOrEqual, // |=
};
public static void GenerateHtml(IEnumerable<Token> tokens, string fileName, string css = null)
{
if (css == null) css = DEFAULT_CSS;
string code = "";
IEnumerator<Token> tokenEnum = tokens.GetEnumerator();
if (!tokenEnum.MoveNext()) return;
Token cur;
do
{
cur = tokenEnum.Current;
TokenType type = cur.Type;
switch (type)
{
case TokenType.Whitespace:
code += " ";
break;
case TokenType.Tab:
code += " " + " " + " " + " ";
break;
case TokenType.NewLine:
code += "<br>";
break;
case TokenType.Number:
code += "<span class=\"number\">" + ((NumToken)cur).Num + "</span>";
break;
case TokenType.String:
code += "<span class=\"string\">" + ((WordToken)cur).Lexeme + "</span>";
break;
case TokenType.Identifier:
code += "<span class=\"identifier\">" + ((WordToken)cur).Lexeme + "</span>";
break;
case TokenType.Comment:
code += "<span class=\"comment\">" + ((WordToken)cur).Lexeme + "</span>";
break;
case TokenType.Error:
code += "<span class=\"undefined\">" + ((WordToken)cur).Lexeme + "</span>";
break;
default:
if (KEYWORDS.Contains(type))
{
code += "<span class=\"keyword\">" + ((WordToken)cur).Lexeme + "</span>";
}
else if(OTHER_RESERVED.Contains(type))
{
code += "<span class=\"reserved\">" + ((WordToken)cur).Lexeme + "</span>";
}
else if (ONE_SYMBOL_OPERATORS.Contains(type))
{
code += "<span class=\"operator\">" + cur.ToString() + "</span>";
}
else if (MULT_SYMBOL_OPERATORS.Contains(type))
{
code += "<span class=\"operator\">" + ((WordToken)cur).Lexeme + "</span>";
}
else
{
code += "<span class=\"default\">" + cur.ToString() + "</span>";
break;
}
break;
}
}
while (tokenEnum.MoveNext() && tokenEnum.Current.Type != TokenType.EOF);
string shouldWrite = string.Format(HTML, css, fileName, code);
using (StreamWriter writer = new StreamWriter(fileName))
{
writer.Write(shouldWrite);
}
}
}
}
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