@NotNull
private Pattern getPattern(String pattern) {
if (!Comparing.strEqual(pattern, myPattern)) {
myCompiledPattern = null;
myPattern = pattern;
}
if (myCompiledPattern == null) {
boolean allowToLower = true;
final int eol = pattern.indexOf('\n');
if (eol != -1) {
pattern = pattern.substring(0, eol);
}
if (pattern.length() >= 80) {
pattern = pattern.substring(0, 80);
}
final @NonNls StringBuffer buffer = new StringBuffer();
if (containsOnlyUppercaseLetters(pattern)) {
allowToLower = false;
}
if (allowToLower) {
buffer.append(".*");
}
boolean firstIdentifierLetter = true;
for (int i = 0; i < pattern.length(); i++) {
final char c = pattern.charAt(i);
if (Character.isLetterOrDigit(c)) {
// This logic allows to use uppercase letters only to catch the name like PDM for
// PsiDocumentManager
if (Character.isUpperCase(c) || Character.isDigit(c)) {
if (!firstIdentifierLetter) {
buffer.append("[^A-Z]*");
}
buffer.append("[");
buffer.append(c);
if (allowToLower || i == 0) {
buffer.append('|');
buffer.append(Character.toLowerCase(c));
}
buffer.append("]");
} else if (Character.isLowerCase(c)) {
buffer.append('[');
buffer.append(c);
buffer.append('|');
buffer.append(Character.toUpperCase(c));
buffer.append(']');
} else {
buffer.append(c);
}
firstIdentifierLetter = false;
} else if (c == '*') {
buffer.append(".*");
firstIdentifierLetter = true;
} else if (c == '.') {
buffer.append("\\.");
firstIdentifierLetter = true;
} else if (c == ' ') {
buffer.append("[^A-Z]*\\ ");
firstIdentifierLetter = true;
} else {
firstIdentifierLetter = true;
// for standard RegExp engine
// buffer.append("\\u");
// buffer.append(Integer.toHexString(c + 0x20000).substring(1));
// for OROMATCHER RegExp engine
buffer.append("\\x");
buffer.append(Integer.toHexString(c + 0x20000).substring(3));
}
}
buffer.append(".*");
try {
myCompiledPattern = new Perl5Compiler().compile(buffer.toString());
} catch (MalformedPatternException e) {
// do nothing
}
}
return myCompiledPattern;
}
private SyntaxNode __backslashToken() throws MalformedPatternException {
SyntaxNode current;
char token;
int number;
__match('\\');
if (__lookahead == 'x') {
__match('x');
// Parse a hexadecimal number
current = _newTokenNode((char) __parseUnsignedInteger(16, 2, 2), __position++);
} else if (__lookahead == 'c') {
__match('c');
// Create a control character
token = Character.toUpperCase(__lookahead);
token = (char) (token > 63 ? token - 64 : token + 64);
current = new TokenNode(token, __position++);
__match(__lookahead);
} else if (__lookahead >= '0' && __lookahead <= '9') {
__match(__lookahead);
if (__lookahead >= '0' && __lookahead <= '9') {
// We have an octal character or a multi-digit backreference.
// Assume octal character for now.
__putback();
number = __parseUnsignedInteger(10, 2, 3);
number = Integer.parseInt(Integer.toString(number), 8);
current = _newTokenNode((char) number, __position++);
} else {
// We have either \0, an escaped digit, or a backreference.
__putback();
if (__lookahead == '0') {
// \0 matches the null character
__match('0');
current = new TokenNode('\0', __position++);
} else {
// Either an escaped digit or backreference.
number = Character.digit(__lookahead, 10);
current = _newTokenNode(__lookahead, __position++);
__match(__lookahead);
}
}
} else if (__lookahead == 'b') {
// Inside of a character class the \b means backspace, otherwise
// it means a word boundary
// if(__inCharacterClass)
// \b always means backspace
current = new TokenNode('\b', __position++);
/*
else
current = new TokenNode((char)LeafNode._WORD_BOUNDARY_MARKER_TOKEN,
position++);
*/
__match('b');
} /*else if(__lookahead == 'B' && !__inCharacterClass){
current = new TokenNode((char)LeafNode._NONWORD_BOUNDARY_MARKER_TOKEN,
position++);
__match('B');
} */ else {
CharacterClassNode characterSet;
token = __lookahead;
switch (__lookahead) {
case 'n':
token = '\n';
break;
case 'r':
token = '\r';
break;
case 't':
token = '\t';
break;
case 'f':
token = '\f';
break;
}
switch (token) {
case 'd':
characterSet = new CharacterClassNode(__position++);
characterSet._addTokenRange('0', '9');
current = characterSet;
break;
case 'D':
characterSet = new NegativeCharacterClassNode(__position++);
characterSet._addTokenRange('0', '9');
current = characterSet;
break;
case 'w':
characterSet = new CharacterClassNode(__position++);
characterSet._addTokenRange('0', '9');
characterSet._addTokenRange('a', 'z');
characterSet._addTokenRange('A', 'Z');
characterSet._addToken('_');
current = characterSet;
break;
case 'W':
characterSet = new NegativeCharacterClassNode(__position++);
characterSet._addTokenRange('0', '9');
characterSet._addTokenRange('a', 'z');
characterSet._addTokenRange('A', 'Z');
characterSet._addToken('_');
current = characterSet;
break;
case 's':
characterSet = new CharacterClassNode(__position++);
characterSet._addToken(' ');
characterSet._addToken('\f');
characterSet._addToken('\n');
characterSet._addToken('\r');
characterSet._addToken('\t');
current = characterSet;
break;
case 'S':
characterSet = new NegativeCharacterClassNode(__position++);
characterSet._addToken(' ');
characterSet._addToken('\f');
characterSet._addToken('\n');
characterSet._addToken('\r');
characterSet._addToken('\t');
current = characterSet;
break;
default:
current = _newTokenNode(token, __position++);
break;
}
__match(__lookahead);
}
return current;
}