private bool _disposedValue; // To detect redundant calls
protected virtual void Dispose(bool disposing)
{
if (!_disposedValue)
{
if (disposing)
{
_writer.Dispose();
_stream.Dispose();
_location = null;
}
_disposedValue = true;
}
}
public FileWriter(string fileName)
{
_location = new EntryLocation()
{
FileName = Path.GetFullPath(fileName)
};
if (File.Exists(fileName))
{
var oldFileName = $"{fileName}.old";
if (File.Exists(oldFileName))
{
File.Delete(oldFileName);
}
File.Move(fileName, oldFileName);
}
_stream = new FileStream(fileName, FileMode.CreateNew);
_writer = new StreamWriter(_stream);
}
/// <summary>
/// Create a file reader
/// </summary>
/// <param name="fileName">file name</param>
/// <param name="tabWidth">tab width, using for replace tab with whitespace</param>
public FileReader(string fileName, int tabWidth = 4)
{
if (tabWidth > 0)
{
var sb = new StringBuilder();
for (var i = 0; i < tabWidth; i++)
{
sb.Append(" ");
}
_tabHolder = sb.ToString();
TabWidth = tabWidth;
}
_location = new EntryLocation()
{
FileName = Path.GetFullPath(fileName)
};
LastLine = null;
_stream = new FileStream(fileName, FileMode.Open);
_reader = new StreamReader(_stream);
}
public static Expression ConvertToExpression(string src, HashSet <MenuEntry> entries,
EntryLocation location, out List <MenuEntry> dependsOn)
{
// using "[number]" to replace all symbols,
// using "{number}" to replace nest atomic expression
dependsOn = null;
if (string.IsNullOrEmpty(src))
{
dependsOn = new List <MenuEntry>();
return(null);
}
var symbols = new List <MenuEntry>();
// three constant expression
var exprs = new List <Expression>
{
ExprN, //id = 0
ExprM, //id = 1
ExprY, //id = 2
};
try
{
// add all string's as constant symbol, and mark as "[id]" in source
var srcTemp = FindStringRegex.Replace(src, match =>
{
if (match.Groups["markL"].Value != match.Groups["markR"].Value)
{
throw new Exception($"Quotes mark are not in pairs. source = {src}.");
}
var str = match.Groups["string"].Value;
var id = GetIndexOfEntry(symbols, str, true);
if (id >= 0)
{
return($"[{id}]");
}
var entry = new MenuEntry()
{
EntryType = MenuEntryType.Config,
Value = str,
IsConst = true, // constant for strings
};
entry.Attributes.Add(new MenuAttribute()
{
AttributeType = MenuAttributeType.ValueType,
ExpressionType = MenuAttributeType.String
});
symbols.Add(entry);
return($"[{symbols.Count - 1}]");
});
// storage constant symbol count
var constSymbolCopunt = symbols.Count;
// add all no-constant symbols, and mark as "[id]" in source
srcTemp = FindSymbolRegex.Replace(srcTemp, match =>
{
var name = match.Groups["name"].Value;
// replace "n" "m" "y" with constant expression "{0}" "{1}" "{2}"
if (IsTristateRegex.IsMatch(name))
{
Enum.TryParse(name, true, out TristateValue type);
return($"{{{(int)type}}}");
}
// if we have add the same symbol, just insert the "[id]"
var id = GetIndexOfEntry(symbols, name);
if (id >= 0)
{
return($"[{id}]");
}
var entry = entries.FirstOrDefault(menuEntry => menuEntry.Name == name);
if (entry == null)
{
throw new Exception($"Entry do not exist, entry name = {name}");
}
symbols.Add(entry);
return($"[{symbols.Count - 1}]");
});
// string to expression
// NestExpressionRegex will find atomic expression with "()" at the outside.
while (NestExpressionRegex.IsMatch(srcTemp))
{
// replace "([n]\{n} op [m]\{m})" to "{x}"
srcTemp = NestExpressionRegex.Replace(srcTemp, matchNest =>
{
var exprStr = matchNest.Groups["expr"].Value;
return(CreateFlatExpression(exprStr, exprs, symbols));
});
}
// replace "[n]\{n} op [m]\{m}" to "{x}"
srcTemp = CreateFlatExpression(srcTemp, exprs, symbols);
// generate final expression, here the string should only have one "[number]" or one "{number}".
Expression result = null;
var matchIndex = FindIndexRegex.Match(srcTemp);
if (!string.IsNullOrEmpty(matchIndex.Groups["expr"].Value))
{
result = exprs[int.Parse(matchIndex.Groups["expr"].Value)];
}
else if (!string.IsNullOrEmpty(matchIndex.Groups["symbol"].Value))
{
// create expression here when string only has one symbol
result = new Expression()
{
Type = ExpressionType.None,
Right = new ExpressionData(
symbols[int.Parse(matchIndex.Groups["symbol"].Value)])
}
}
;
// depends on are the no constant symbols
dependsOn = symbols.GetRange(constSymbolCopunt,
symbols.Count - constSymbolCopunt);
symbols.Clear();
exprs.Clear();
return(result);
}
catch (Exception ex)
{
// if depends on symbol do not exist, set expression as null, and depends on list as empty.
Console.WriteLine($"{ex.Message}. {location}", Brushes.Red);
dependsOn = new List <MenuEntry>();
return(null);
}
}
public ParseException(string message,
Exception innerException, EntryLocation location)
: base(message, innerException)
{
Location = location;
}
public ParseException(EntryLocation location)
{
Location = location;
}