// tries to parse a line - if it fails, it will return null
private static filter_line parse_impl(string line) {
line = line.Trim();
if (line.StartsWith("#"))
// allow comments
return null;
if (line == "full-word")
// 1.8.17 - can happen from Find >> To Filter - but we don't handle it yet
return null;
if (line.StartsWith("font") || line.StartsWith("color") || line.StartsWith("match_color"))
return parse_font(line);
if (line == "case-insensitive")
return new filter_line(line) {part = part_type.case_sensitive_info, case_sensitive = false };
if ( !line.StartsWith("$"))
return null;
string[] words = line.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
// Syntax:
// $ColumnName Comparison Text
bool ok = words.Length >= 3 || (words.Length == 2 && is_regex_expression(words[1]));
if (!ok)
// we need at least $c compare word(s)
return null;
filter_line fi = new filter_line(line);
fi.part = part_type_io.from_str(words[0]);
if (fi.part == part_type.invalid)
return null;
if (words.Length == 2) {
// comparison is not present; inferred as regex
fi.text = words[1];
fi.comparison = comparison_type.regex;
fi.lo_text = fi.text.ToLower();
fi.create_regex();
return fi.regex_ != null ? fi : null ;
}
switch ( words[1].ToLower() ) {
case "!=": fi.comparison = comparison_type.not_equal; break;
case "==":
case "=":
fi.comparison = comparison_type.equal; break;
case "+":
case "startswith":
fi.comparison = comparison_type.starts_with; break;
case "-":
case "!startswith":
fi.comparison = comparison_type.does_not_start_with; break;
case "++":
case "contains":
fi.comparison = comparison_type.contains; break;
case "--":
case "!contains":
fi.comparison = comparison_type.does_not_contain; break;
case "containsany":
case "any":
fi.comparison = comparison_type.contains_any; break;
case "containsnone":
case "none":
fi.comparison = comparison_type.contains_none;
break;
case "matches":
case "match":
fi.comparison = comparison_type.regex;
break;
default:
return null;
}
// take the rest of the text
int compare_idx = line.IndexOf(words[1]);
if (compare_idx + words[1].Length + 1 >= line.Length)
// nothing following the comparison
return null;
// 1.2.20+ - don't trim the end! - very likely the user wants the beginning/ending spaces to be in the comparison
line = line.Substring(compare_idx + words[1].Length + 1);
if (fi.comparison == comparison_type.contains_any || fi.comparison == comparison_type.contains_none) {
fi.words = line.Split('|');
fi.lo_words = fi.words.Select(w => w.ToLower()).ToArray();
}
// 1.8.17+ - allow specifying quotes for contains or !contains
line = trim_quotes(line);
fi.text = line;
fi.lo_text = line.ToLower();
fi.create_regex();
if (fi.comparison == comparison_type.regex && fi.regex_ == null)
// the regex is invalid at this point
return null;
return fi;
}
// tries to parse a line - if it fails, it will return null
private static filter_line parse_impl(string line)
{
line = line.Trim();
if (line.StartsWith("#"))
{
// allow comments
return(null);
}
if (line.StartsWith("font") || line.StartsWith("color") || line.StartsWith("match_color"))
{
return(parse_font(line));
}
if (line == "case-insensitive")
{
return new filter_line(line)
{
part = part_type.case_sensitive_info, case_sensitive = false
}
}
;
if (!line.StartsWith("$"))
{
return(null);
}
string[] words = line.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
// Syntax:
// $ColumnName Comparison Text
bool ok = words.Length >= 3 || (words.Length == 2 && is_regex_expression(words[1]));
if (!ok)
{
// we need at least $c compare word(s)
return(null);
}
filter_line fi = new filter_line(line);
fi.part = part_type_io.from_str(words[0]);
if (fi.part == part_type.invalid)
{
return(null);
}
if (words.Length == 2)
{
// comparison is not present; inferred as regex
fi.text = words[1];
fi.comparison = comparison_type.regex;
fi.lo_text = fi.text.ToLower();
fi.create_regex();
return(fi.regex_ != null ? fi : null);
}
switch (words[1].ToLower())
{
case "!=": fi.comparison = comparison_type.not_equal; break;
case "==":
case "=":
fi.comparison = comparison_type.equal; break;
case "+":
case "startswith":
fi.comparison = comparison_type.starts_with; break;
case "-":
case "!startswith":
fi.comparison = comparison_type.does_not_start_with; break;
case "++":
case "contains":
fi.comparison = comparison_type.contains; break;
case "--":
case "!contains":
fi.comparison = comparison_type.does_not_contain; break;
case "containsany":
case "any":
fi.comparison = comparison_type.contains_any; break;
case "containsnone":
case "none":
fi.comparison = comparison_type.contains_none;
break;
case "matches":
case "match":
fi.comparison = comparison_type.regex;
break;
default:
return(null);
}
// take the rest of the text
int compare_idx = line.IndexOf(words[1]);
if (compare_idx + words[1].Length + 1 >= line.Length)
{
// nothing following the comparison
return(null);
}
// 1.2.20+ - don't trim the end! - very likely the user wants the beginning/ending spaces to be in the comparison
line = line.Substring(compare_idx + words[1].Length + 1);
if (fi.comparison == comparison_type.contains_any || fi.comparison == comparison_type.contains_none)
{
fi.words = line.Split('|');
fi.lo_words = fi.words.Select(w => w.ToLower()).ToArray();
}
fi.text = line;
fi.lo_text = line.ToLower();
fi.create_regex();
if (fi.comparison == comparison_type.regex && fi.regex_ == null)
{
// the regex is invalid at this point
return(null);
}
return(fi);
}
// tries to parse a line - if it fails, it will return null
private static filter_line parse_impl(string line)
{
line = line.Trim();
if (line.StartsWith("#"))
{
// allow comments
return(null);
}
if (line == "full-word")
{
// 1.8.17 - can happen from Find >> To Filter - but we don't handle it yet
return(null);
}
if (line.StartsWith("font") || line.StartsWith("color") || line.StartsWith("match_color"))
{
return(parse_font(line));
}
if (line == "case-insensitive")
{
return new filter_line(line)
{
part = part_type.case_sensitive_info, case_sensitive = false
}
}
;
if (!line.StartsWith("$"))
{
return(null);
}
string[] words = line.Split(new[] { " " }, StringSplitOptions.RemoveEmptyEntries);
// Syntax:
// $ColumnName Comparison Text
if (words.Length < 3)
{
// we need at least $c compare word(s)
return(null);
}
filter_line fi = new filter_line(line)
{
part = part_type_io.from_str(words[0])
};
if (fi.part == part_type.invalid)
{
return(null);
}
switch (words[1].ToLower())
{
case "!=": fi.comparison = comparison_type.not_equal; break;
case "==":
case "=":
fi.comparison = comparison_type.equal; break;
case "+":
case "startswith":
fi.comparison = comparison_type.starts_with; break;
case "-":
case "!startswith":
fi.comparison = comparison_type.does_not_start_with; break;
case "++":
case "contains":
fi.comparison = comparison_type.contains; break;
case "--":
case "!contains":
fi.comparison = comparison_type.does_not_contain; break;
case "containsany":
case "any":
case "in":
fi.comparison = comparison_type.contains_any; break;
case "containsnone":
case "none":
case "!in":
fi.comparison = comparison_type.contains_none;
break;
case "matches":
case "match":
case "regex":
case "r":
fi.comparison = comparison_type.regex;
break;
default:
return(null);
}
// take the rest of the text
int compare_idx = line.IndexOf(words[1]);
if (compare_idx + words[1].Length + 1 >= line.Length)
{
// nothing following the comparison
return(null);
}
// 1.2.20+ - don't trim the end! - very likely the user wants the beginning/ending spaces to be in the comparison
line = line.Substring(compare_idx + words[1].Length + 1);
if (fi.comparison == comparison_type.contains_any || fi.comparison == comparison_type.contains_none)
{
fi.words = line.Split('|');
fi.lo_words = fi.words.Select(w => w.ToLower()).ToArray();
}
// 1.8.17+ - allow specifying quotes for contains or !contains
line = trim_quotes(line);
fi.text = line;
fi.lo_text = line.ToLower();
fi.create_regex();
if (fi.comparison == comparison_type.regex && fi.regex_ == null)
{
// the regex is invalid at this point
return(null);
}
return(fi);
}