public string Colorize(LogicColorizerInterface logicColorizer,string sourceText)
{
sourceText = HelperFunctions.TabsToSpaces(sourceText);
StringBuilder sb = new StringBuilder();
logicColorizer.StartBlock(sb);
int lastTextStartBlock = 0;
int lastWordStartBlock = 0;
int numBracketComments = 0;
Char quoteChar = '\'';
ProcessType processType = ProcessType.None;
for( int i = 0; i < sourceText.Length; i++ )
{
bool additionalCharacterExists = ( ( i + 1 ) < sourceText.Length );
bool processPreviousBlock = true;
bool processPreviousBlockIncludeThisCharacter = false;
bool reprocessCharacter = false;
ProcessType savedProcessType = processType;
int savedI = i;
// newlines
if( sourceText[i] == '\r' || sourceText[i] == '\n' )
{
if( additionalCharacterExists && ( sourceText[i + 1] == '\r' || sourceText[i + 1] == '\n' ) )
i++;
processType = ProcessType.Newline;
}
// line comments
else if( savedProcessType != ProcessType.QuotedString && additionalCharacterExists && sourceText[i] == '/' && sourceText[i + 1] == '/' )
{
i++;
processType = ProcessType.LineComment;
}
else if( savedProcessType == ProcessType.LineComment )
processPreviousBlock = false;
// bracket comments
else if( savedProcessType != ProcessType.QuotedString && savedProcessType != ProcessType.LineComment && sourceText[i] == '{' )
{
numBracketComments++;
processType = ProcessType.BracketComment;
if( savedProcessType == ProcessType.BracketComment ) // in a nested comment
processPreviousBlock = false;
}
else if( savedProcessType == ProcessType.BracketComment )
{
if( sourceText[i] == '}' )
{
numBracketComments = Math.Max(0,numBracketComments - 1);
if( numBracketComments == 0 )
{
processPreviousBlockIncludeThisCharacter = true;
processType = ProcessType.None;
}
}
else
processPreviousBlock = false;
}
// numbers
else if( savedProcessType == ProcessType.None && Char.IsDigit(sourceText[i]) )
processType = ProcessType.Number;
else if( savedProcessType == ProcessType.Number )
{
if( Char.IsDigit(sourceText[i]) || sourceText[i] == '.' )
processPreviousBlock = false;
else
{
processType = ProcessType.None;
reprocessCharacter = true;
}
}
// quoted strings
else if( sourceText[i] == '\'' || sourceText[i] == '"' )
{
if( processType == ProcessType.QuotedString )
{
// make sure that it's not an escaped quotation character
if( sourceText[i] == quoteChar && sourceText[i - 1] != '\\' )
{
processPreviousBlockIncludeThisCharacter = true;
processType = ProcessType.None;
}
}
else
{
processType = ProcessType.QuotedString;
quoteChar = sourceText[i];
}
}
else if( processType == ProcessType.QuotedString )
processPreviousBlock = false;
// keywords
else if( savedProcessType == ProcessType.None && Char.IsLetter(sourceText[i]) )
{
lastWordStartBlock = i;
processType = ProcessType.Keyword;
}
else if( savedProcessType == ProcessType.Keyword )
{
if( Char.IsLetterOrDigit(sourceText[i]) || sourceText[i] == '_' )
processPreviousBlock = false;
else
processType = ProcessType.None;
}
// anything that doesn't fit the above checks
else
processPreviousBlock = false;
// process the block if there is no more code to read
bool atEndOfBuffer = ( i + 1 ) == sourceText.Length;
if( atEndOfBuffer )
{
processPreviousBlock = true;
processPreviousBlockIncludeThisCharacter = ( processType != ProcessType.Newline );
}
// process the previous block (if applicable)
if( processPreviousBlock )
{
string text = sourceText.Substring(lastTextStartBlock,savedI - lastTextStartBlock + ( processPreviousBlockIncludeThisCharacter ? 1 : 0 ));
bool resetLastTextStartBlock = true;
if( savedProcessType == ProcessType.LineComment || savedProcessType == ProcessType.BracketComment )
logicColorizer.AddComment(sb,text);
else if( savedProcessType == ProcessType.Number )
logicColorizer.AddNumber(sb,text);
else if( savedProcessType == ProcessType.QuotedString )
logicColorizer.AddQuotedString(sb,text);
else if( savedProcessType == ProcessType.Keyword )
{
bool includeLastCharacter = ( processPreviousBlockIncludeThisCharacter && processType == ProcessType.Keyword );
bool outputLastCharacterAsText = ( atEndOfBuffer && !includeLastCharacter && processPreviousBlockIncludeThisCharacter && processType != ProcessType.Keyword );
string keyword = sourceText.Substring(lastWordStartBlock,savedI - lastWordStartBlock + ( includeLastCharacter ? 1 : 0 ));
if( _reservedWords.Contains(keyword.ToUpper()) )
{
logicColorizer.AddText(sb,text.Substring(0,text.Length - keyword.Length - ( outputLastCharacterAsText ? 1 : 0 )));
logicColorizer.AddKeyword(sb,keyword);
if( outputLastCharacterAsText )
logicColorizer.AddText(sb,text.Substring(keyword.Length));
}
else if( processType == ProcessType.Newline || atEndOfBuffer )
logicColorizer.AddText(sb,text);
else
resetLastTextStartBlock = false;
}
else if( savedProcessType == ProcessType.None )
logicColorizer.AddText(sb,text);
if( processType == ProcessType.Newline )
{
logicColorizer.AddNewLine(sb);
processType = ( numBracketComments > 0 ) ? ProcessType.BracketComment : ProcessType.None;
lastTextStartBlock = i + 1; // skip over the newline character
}
else if( resetLastTextStartBlock )
lastTextStartBlock = savedI + ( processPreviousBlockIncludeThisCharacter ? 1 : 0 );
}
if( reprocessCharacter )
i--;
}
logicColorizer.EndBlock(sb);
return sb.ToString();
}
public LogicColorizer(LogicColorizerInterface defaultLogicColorizer)
: this()
{
_defaultLogicColorizer = defaultLogicColorizer;
}
