List <TextWord> ParseLine(IDocument document)
{
List <TextWord> words = new List <TextWord>();
HighlightColor markNext = null;
currentOffset = 0;
currentLength = 0;
UpdateSpanStateVariables();
int currentLineLength = currentLine.Length;
int currentLineOffset = currentLine.Offset;
for (int i = 0; i < currentLineLength; ++i)
{
char ch = document.GetCharAt(currentLineOffset + i);
switch (ch)
{
case '\n':
case '\r':
PushCurWord(document, ref markNext, words);
++currentOffset;
continue;
case ' ':
PushCurWord(document, ref markNext, words);
if (activeSpan != null && activeSpan.Color.HasBackground)
{
words.Add(new TextWord.SpaceTextWord(activeSpan.Color));
}
else
{
words.Add(TextWord.Space);
}
++currentOffset;
continue;
case '\t':
PushCurWord(document, ref markNext, words);
if (activeSpan != null && activeSpan.Color.HasBackground)
{
words.Add(new TextWord.TabTextWord(activeSpan.Color));
}
else
{
words.Add(TextWord.Tab);
}
++currentOffset;
continue;
}
// handle escape characters
char escapeCharacter = '\0';
if (activeSpan != null && activeSpan.EscapeCharacter != '\0')
{
escapeCharacter = activeSpan.EscapeCharacter;
}
else if (activeRuleSet != null)
{
escapeCharacter = activeRuleSet.EscapeCharacter;
}
if (escapeCharacter != '\0' && escapeCharacter == ch)
{
// we found the escape character
if (activeSpan != null && activeSpan.End != null && activeSpan.End.Length == 1 &&
escapeCharacter == activeSpan.End[0])
{
// the escape character is a end-doubling escape character
// it may count as escape only when the next character is the escape, too
if (i + 1 < currentLineLength)
{
if (document.GetCharAt(currentLineOffset + i + 1) == escapeCharacter)
{
currentLength += 2;
PushCurWord(document, ref markNext, words);
++i;
continue;
}
}
}
else
{
// this is a normal \-style escape
++currentLength;
if (i + 1 < currentLineLength)
{
++currentLength;
}
PushCurWord(document, ref markNext, words);
++i;
continue;
}
}
// highlight digits
if (!inSpan && (Char.IsDigit(ch) || (ch == '.' && i + 1 < currentLineLength && Char.IsDigit(document.GetCharAt(currentLineOffset + i + 1)))) && currentLength == 0)
{
bool ishex = false;
bool isfloatingpoint = false;
if (ch == '0' && i + 1 < currentLineLength && Char.ToUpper(document.GetCharAt(currentLineOffset + i + 1)) == 'X') // hex digits
{
const string hex = "0123456789ABCDEF";
++currentLength;
++i; // skip 'x'
++currentLength;
ishex = true;
while (i + 1 < currentLineLength && hex.IndexOf(Char.ToUpper(document.GetCharAt(currentLineOffset + i + 1))) != -1)
{
++i;
++currentLength;
}
}
else
{
++currentLength;
while (i + 1 < currentLineLength && Char.IsDigit(document.GetCharAt(currentLineOffset + i + 1)))
{
++i;
++currentLength;
}
}
if (!ishex && i + 1 < currentLineLength && document.GetCharAt(currentLineOffset + i + 1) == '.')
{
isfloatingpoint = true;
++i;
++currentLength;
while (i + 1 < currentLineLength && Char.IsDigit(document.GetCharAt(currentLineOffset + i + 1)))
{
++i;
++currentLength;
}
}
if (i + 1 < currentLineLength && Char.ToUpper(document.GetCharAt(currentLineOffset + i + 1)) == 'E')
{
isfloatingpoint = true;
++i;
++currentLength;
if (i + 1 < currentLineLength && (document.GetCharAt(currentLineOffset + i + 1) == '+' || document.GetCharAt(currentLine.Offset + i + 1) == '-'))
{
++i;
++currentLength;
}
while (i + 1 < currentLine.Length && Char.IsDigit(document.GetCharAt(currentLineOffset + i + 1)))
{
++i;
++currentLength;
}
}
if (i + 1 < currentLine.Length)
{
char nextch = Char.ToUpper(document.GetCharAt(currentLineOffset + i + 1));
if (nextch == 'F' || nextch == 'M' || nextch == 'D')
{
isfloatingpoint = true;
++i;
++currentLength;
}
}
if (!isfloatingpoint)
{
bool isunsigned = false;
if (i + 1 < currentLineLength && Char.ToUpper(document.GetCharAt(currentLineOffset + i + 1)) == 'U')
{
++i;
++currentLength;
isunsigned = true;
}
if (i + 1 < currentLineLength && Char.ToUpper(document.GetCharAt(currentLineOffset + i + 1)) == 'L')
{
++i;
++currentLength;
if (!isunsigned && i + 1 < currentLineLength && Char.ToUpper(document.GetCharAt(currentLineOffset + i + 1)) == 'U')
{
++i;
++currentLength;
}
}
}
words.Add(new TextWord(document, currentLine, currentOffset, currentLength, DigitColor, false));
currentOffset += currentLength;
currentLength = 0;
continue;
}
// Check for SPAN ENDs
if (inSpan)
{
if (activeSpan.End != null && activeSpan.End.Length > 0)
{
if (MatchExpr(currentLine, activeSpan.End, i, document, activeSpan.IgnoreCase))
{
PushCurWord(document, ref markNext, words);
string regex = GetRegString(currentLine, activeSpan.End, i, document);
currentLength += regex.Length;
words.Add(new TextWord(document, currentLine, currentOffset, currentLength, activeSpan.EndColor, false));
currentOffset += currentLength;
currentLength = 0;
i += regex.Length - 1;
currentSpanStack.Pop();
UpdateSpanStateVariables();
continue;
}
}
}
// check for SPAN BEGIN
if (activeRuleSet != null)
{
Span mySpan = null;
foreach (Span span in activeRuleSet.Spans)
{
if (span.IsBeginSingleWord && currentLength != 0)
{
continue;
}
if (span.IsBeginStartOfLine.HasValue &&
span.IsBeginStartOfLine.Value !=
(currentLength == 0 && words.TrueForAll(
delegate(TextWord textWord) { return(textWord.Type != TextWordType.Word); })))
{
continue;
}
if (!MatchExpr(currentLine, span.Begin, i, document, activeRuleSet.IgnoreCase))
{
continue;
}
mySpan = span;
break;
}
if (mySpan != null)
{
PushCurWord(document, ref markNext, words);
string regex = GetRegString(currentLine, mySpan.Begin, i, document);
if (!OverrideSpan(regex, document, words, mySpan, ref i))
{
currentLength += regex.Length;
words.Add(new TextWord(document, currentLine, currentOffset, currentLength, mySpan.BeginColor, false));
currentOffset += currentLength;
currentLength = 0;
i += regex.Length - 1;
if (currentSpanStack == null)
{
currentSpanStack = new SpanStack();
}
currentSpanStack.Push(mySpan);
mySpan.IgnoreCase = activeRuleSet.IgnoreCase;
UpdateSpanStateVariables();
}
continue;
}
}
// check if the char is a delimiter
if (activeRuleSet != null && (int)ch < 256 && activeRuleSet.Delimiters[(int)ch])
{
PushCurWord(document, ref markNext, words);
if (currentOffset + currentLength + 1 < currentLine.Length)
{
++currentLength;
PushCurWord(document, ref markNext, words);
continue;
}
}
++currentLength;
}
PushCurWord(document, ref markNext, words);
OnParsedLine(document, currentLine, words);
return(words);
}
