static DocEntity CopyAndReset(ref DocEntity entity)
{
DocEntity result = new DocEntity
{
Type = entity.Type,
State = entity.State,
Argument = entity.Argument,
};
entity = CreateEmptyTextEntity();
return result;
}
static DocEntity CopyAndReset(ref DocEntity entity)
{
DocEntity result = new DocEntity
{
Type = entity.Type,
State = entity.State,
Argument = entity.Argument,
};
entity = CreateEmptyTextEntity();
return(result);
}
static IEnumerable <DocEntity> ParseLine(string line)
{
if (line.StartsWith("/codebegin:"))
{
yield return(new DocEntity
{
Type = DocEntityType.Code,
State = DocEntityState.Close,
Argument = line.Substring("/codebegin:".Length),
});
}
else if (line == "/codeend")
{
yield return(new DocEntity
{
Type = DocEntityType.Code,
State = DocEntityState.Close,
Argument = "",
});
}
else
{
ParseState state = ParseState.Text;
DocEntity entity = CreateEmptyTextEntity();
foreach (char c in line)
{
switch (state)
{
case ParseState.Text:
{
if (c == '/')
{
if (entity.Argument != "")
{
yield return(CopyAndReset(ref entity));
}
state = ParseState.Slash;
}
else
{
entity.Argument += c;
}
}
break;
case ParseState.Slash:
{
switch (c)
{
case '+':
entity.State = DocEntityState.Open;
state = ParseState.SlashName;
break;
case '-':
entity.State = DocEntityState.Close;
state = ParseState.SlashName;
break;
default:
entity.Argument += c;
state = ParseState.SlashName;
break;
}
}
break;
case ParseState.SlashName:
{
switch (c)
{
case '/':
entity.Type = GetType(entity.Argument);
entity.Argument = "";
yield return(CopyAndReset(ref entity));
state = ParseState.Text;
break;
case ':':
entity.Type = GetType(entity.Argument);
entity.Argument = "";
state = ParseState.WaitingForParam;
break;
default:
entity.Argument += c;
break;
}
}
break;
case ParseState.WaitingForParam:
{
switch (c)
{
case '/':
yield return(CopyAndReset(ref entity));
state = ParseState.Text;
break;
case '"':
state = ParseState.InParamQuot;
break;
default:
entity.Argument += c;
state = ParseState.InParam;
break;
}
}
break;
case ParseState.InParamQuot:
{
switch (c)
{
case '"':
state = ParseState.OutParamQuot;
break;
default:
entity.Argument += c;
break;
}
}
break;
case ParseState.OutParamQuot:
{
switch (c)
{
case '/':
yield return(CopyAndReset(ref entity));
state = ParseState.Text;
break;
default:
throw new ArgumentException("'/' expected after quot argument。");
}
}
break;
case ParseState.InParam:
{
switch (c)
{
case '/':
yield return(CopyAndReset(ref entity));
state = ParseState.Text;
break;
default:
entity.Argument += c;
break;
}
}
break;
}
}
if (entity.Type == DocEntityType.Text && entity.Argument != "")
{
yield return(entity);
}
}
}