private static bool IsVersePara(UsfmToken paraToken)
{
string style = paraToken.Marker.Marker;
if (NonVerseParaStyles.Contains(style))
{
return(false);
}
if (IsNumberedStyle("ms", style))
{
return(false);
}
if (IsNumberedStyle("s", style))
{
return(false);
}
return(true);
}
public IEnumerable <UsfmToken> Parse(string usfm, bool preserveWhitespace = false)
{
List <UsfmToken> tokens = new List <UsfmToken>();
int index = 0; // Current position
while (index < usfm.Length)
{
int nextMarkerIndex = (index < usfm.Length - 1) ? usfm.IndexOf('\\', index + 1) : -1;
if (nextMarkerIndex == -1)
{
nextMarkerIndex = usfm.Length;
}
// If text, create text token until end or next \
var ch = usfm[index];
if (ch != '\\')
{
string text = usfm.Substring(index, nextMarkerIndex - index);
if (!preserveWhitespace)
{
text = RegularizeSpaces(text);
}
tokens.Add(new UsfmToken(UsfmTokenType.Text, null, text));
index = nextMarkerIndex;
continue;
}
// Get marker (and move past whitespace or star ending)
index++;
int markerStart = index;
while (index < usfm.Length)
{
ch = usfm[index];
// Backslash starts a new marker
if (ch == '\\')
{
break;
}
// End star is part of marker
if (ch == '*')
{
index++;
break;
}
if (IsNonSemanticWhiteSpace(ch))
{
// Preserve whitespace if needed, otherwise skip
if (!preserveWhitespace)
{
index++;
}
break;
}
index++;
}
string markerStr = usfm.Substring(markerStart, index - markerStart).TrimEnd();
// Multiple whitespace after non-end marker is ok
if (!markerStr.EndsWith("*", StringComparison.Ordinal) && !preserveWhitespace)
{
while ((index < usfm.Length) && IsNonSemanticWhiteSpace(usfm[index]))
{
index++;
}
}
// Lookup marker
UsfmMarker marker = _stylesheet.GetMarker(markerStr.TrimStart('+'));
// If starts with a plus and is not a character style, it is an unknown marker
if (markerStr.StartsWith("+", StringComparison.Ordinal) && marker.StyleType != UsfmStyleType.Character)
{
marker = _stylesheet.GetMarker(markerStr);
}
switch (marker.StyleType)
{
case UsfmStyleType.Character:
// Handle verse special case
if ((marker.TextProperties & UsfmTextProperties.Verse) > 0)
{
tokens.Add(new UsfmToken(UsfmTokenType.Verse, marker, GetNextWord(usfm, ref index, preserveWhitespace)));
}
else
{
tokens.Add(new UsfmToken(UsfmTokenType.Character, marker, null));
}
break;
case UsfmStyleType.Paragraph:
// Handle chapter special case
if ((marker.TextProperties & UsfmTextProperties.Chapter) > 0)
{
tokens.Add(new UsfmToken(UsfmTokenType.Chapter, marker, GetNextWord(usfm, ref index, preserveWhitespace)));
}
else if ((marker.TextProperties & UsfmTextProperties.Book) > 0)
{
tokens.Add(new UsfmToken(UsfmTokenType.Book, marker, GetNextWord(usfm, ref index, preserveWhitespace)));
}
else
{
tokens.Add(new UsfmToken(UsfmTokenType.Paragraph, marker, null));
}
break;
case UsfmStyleType.Note:
tokens.Add(new UsfmToken(UsfmTokenType.Note, marker, GetNextWord(usfm, ref index, preserveWhitespace)));
break;
case UsfmStyleType.End:
tokens.Add(new UsfmToken(UsfmTokenType.End, marker, null));
break;
case UsfmStyleType.Unknown:
// End tokens are always end tokens, even if unknown
if (markerStr.EndsWith("*", StringComparison.Ordinal))
{
tokens.Add(new UsfmToken(UsfmTokenType.End, marker, null));
}
else
{
// Handle special case of esb and esbe which might not be in basic stylesheet
// but are always sidebars and so should be tokenized as paragraphs
if (markerStr == "esb" || markerStr == "esbe")
{
tokens.Add(new UsfmToken(UsfmTokenType.Paragraph, marker, null));
break;
}
// Create unknown token with a corresponding end note
tokens.Add(new UsfmToken(UsfmTokenType.Unknown, marker, null));
}
break;
}
}
// Forces a space to be present in tokenization if immediately
// before a token requiring a preceeding CR/LF. This is to ensure
// that when written to disk and re-read, that tokenization
// will match. For example, "\p test\p here" requires a space
// after "test". Also, "\p \em test\em*\p here" requires a space
// token inserted after \em*
if (!preserveWhitespace)
{
for (int i = 1; i < tokens.Count; i++)
{
// If requires newline (verses do, except when after '(' or '[')
if (tokens[i].Type == UsfmTokenType.Book ||
tokens[i].Type == UsfmTokenType.Chapter ||
tokens[i].Type == UsfmTokenType.Paragraph ||
(tokens[i].Type == UsfmTokenType.Verse &&
!(tokens[i - 1].Type == UsfmTokenType.Text &&
(tokens[i - 1].Text.EndsWith("(", StringComparison.Ordinal) || tokens[i - 1].Text.EndsWith("[", StringComparison.Ordinal)))))
{
// Add space to text token
if (tokens[i - 1].Type == UsfmTokenType.Text)
{
if (!tokens[i - 1].Text.EndsWith(" ", StringComparison.Ordinal))
{
tokens[i - 1] = new UsfmToken(tokens[i - 1].Text + " ");
}
}
else if (tokens[i - 1].Type == UsfmTokenType.End)
{
// Insert space token after * of end marker
tokens.Insert(i, new UsfmToken(UsfmTokenType.Text, null, " "));
i++;
}
}
}
}
return(tokens);
}
