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/* * 09/03/2005 * * CSSTokenMaker.java - Token maker for CSS 3 files. * * This library is distributed under a modified BSD license. See the included * RSyntaxTextArea.License.txt file for details. */ package org.fife.ui.rsyntaxtextarea.modes; import java.io.*; import javax.swing.text.Segment; import org.fife.ui.rsyntaxtextarea.*; /** * This class splits up text into tokens representing a CSS 3 file. It's * written with a few extra internal states so that it can easily be copy * and pasted into HTML, PHP, and JSP TokenMakres when it is updated.file will contain 2 * definitions of both* * This implementation was created using * JFlex 1.4.1; however, the generated file * was modified for performance. Memory allocation needs to be almost * completely removed to be competitive with the handwritten lexers (subclasses * of
AbstractTokenMaker, so this class has been modified so that * Strings are never allocated (via yytext()), and the scanner never has to * worry about refilling its buffer (needlessly copying chars around). * We can achieve this because RText always scans exactly 1 line of tokens at a * time, and hands the scanner this line as an array of characters (a Segment * really). Since tokens contain pointers to char arrays instead of Strings * holding their contents, there is no need for allocating new memory for * Strings.* * The actual algorithm generated for scanning has, of course, not been * modified.
* * If you wish to regenerate this file yourself, keep in mind the following: *
*
- The generated CSSTokenMaker.java
zzRefillandyyreset. * You should hand-delete the second of each definition (the ones * generated by the lexer), as these generated methods modify the input * buffer, which we'll never have to do. *
yylex() on the generated scanner
* directly; rather, you should use getTokenList as you would
* with any other TokenMaker instance.zzMarkedPos.
*
* @param tokenType The token's type.
*/
private void addEndToken(int tokenType) {
addToken(zzMarkedPos,zzMarkedPos, tokenType);
}
/**
* Adds the token specified to the current linked list of tokens.
*
* @param tokenType The token's type.
* @see #addToken(int, int, int)
*/
private void addHyperlinkToken(int start, int end, int tokenType) {
int so = start + offsetShift;
addToken(zzBuffer, start,end, tokenType, so, true);
}
/**
* Adds the token specified to the current linked list of tokens.
*
* @param tokenType The token's type.
*/
private void addToken(int tokenType) {
addToken(zzStartRead, zzMarkedPos-1, tokenType);
}
/**
* Adds the token specified to the current linked list of tokens.
*
* @param tokenType The token's type.
*/
private void addToken(int start, int end, int tokenType) {
int so = start + offsetShift;
addToken(zzBuffer, start,end, tokenType, so);
}
/**
* Adds the token specified to the current linked list of tokens.
*
* @param array The character array.
* @param start The starting offset in the array.
* @param end The ending offset in the array.
* @param tokenType The token's type.
* @param startOffset The offset in the document at which this token
* occurs.
*/
@Override
public void addToken(char[] array, int start, int end, int tokenType, int startOffset) {
super.addToken(array, start,end, tokenType, startOffset);
zzStartRead = zzMarkedPos;
}
/**
* Returns the closest {@link TokenTypes "standard" token type} for a given
* "internal" token type (e.g. one whose value is < 0).
*/
@Override
public int getClosestStandardTokenTypeForInternalType(int type) {
switch (type) {
case INTERNAL_CSS_STRING:
case INTERNAL_CSS_CHAR:
return TokenTypes.LITERAL_STRING_DOUBLE_QUOTE;
case INTERNAL_CSS_MLC:
return TokenTypes.COMMENT_MULTILINE;
}
return type;
}
/**
* Returns true since CSS uses curly braces.
*
* @return true always.
*/
public boolean getCurlyBracesDenoteCodeBlocks() {
return true;
}
/**
* {@inheritDoc}
*/
@Override
public boolean getMarkOccurrencesOfTokenType(int type) {
return type==Token.RESERVED_WORD; // Used for CSS keys
}
/**
* {@inheritDoc}
*/
@Override
public boolean getShouldIndentNextLineAfter(Token t) {
if (t!=null && t.length()==1) {
char ch = t.charAt(0);
return ch=='{' || ch=='(';
}
return false;
}
/**
* Returns the first token in the linked list of tokens generated
* from text. This method must be implemented by
* subclasses so they can correctly implement syntax highlighting.
*
* @param text The text from which to get tokens.
* @param initialTokenType The token type we should start with.
* @param startOffset The offset into the document at which
* text starts.
* @return The first Token in a linked list representing
* the syntax highlighted text.
*/
public Token getTokenList(Segment text, int initialTokenType, int startOffset) {
resetTokenList();
this.offsetShift = -text.offset + startOffset;
cssPrevState = YYINITIAL; // Shouldn't be necessary
// Start off in the proper state.
int state = Token.NULL;
switch (initialTokenType) {
case Token.LITERAL_STRING_DOUBLE_QUOTE:
state = CSS_STRING;
break;
case Token.LITERAL_CHAR:
state = CSS_CHAR_LITERAL;
break;
case Token.COMMENT_MULTILINE:
state = CSS_C_STYLE_COMMENT;
break;
case INTERNAL_CSS_PROPERTY:
state = CSS_PROPERTY;
break;
case INTERNAL_CSS_VALUE:
state = CSS_VALUE;
break;
default:
if (initialTokenType<-1024) {
int main = -(-initialTokenType & 0xffffff00);
switch (main) {
default: // Should never happen
case INTERNAL_CSS_STRING:
state = CSS_STRING;
break;
case INTERNAL_CSS_CHAR:
state = CSS_CHAR_LITERAL;
break;
case INTERNAL_CSS_MLC:
state = CSS_C_STYLE_COMMENT;
break;
}
cssPrevState = -initialTokenType&0xff;
}
else {
state = Token.NULL;
}
}
start = text.offset;
s = text;
try {
yyreset(zzReader);
yybegin(state);
return yylex();
} catch (IOException ioe) {
ioe.printStackTrace();
return new TokenImpl();
}
}
/**
* Overridden to accept letters, digits, underscores, and hyphens.
*/
@Override
public boolean isIdentifierChar(int languageIndex, char ch) {
return Character.isLetterOrDigit(ch) || ch=='-' || ch=='.' || ch=='_';
}
/**
* Refills the input buffer.
*
* @return true if EOF was reached, otherwise
* false.
*/
private boolean zzRefill() {
return zzCurrentPos>=s.offset+s.count;
}
/**
* Resets the scanner to read from a new input stream.
* Does not close the old reader.
*
* All internal variables are reset, the old input stream
* cannot be reused (internal buffer is discarded and lost).
* Lexical state is set to YY_INITIAL.
*
* @param reader the new input stream
*/
public final void yyreset(java.io.Reader reader) {
// 's' has been updated.
zzBuffer = s.array;
/*
* We replaced the line below with the two below it because zzRefill
* no longer "refills" the buffer (since the way we do it, it's always
* "full" the first time through, since it points to the segment's
* array). So, we assign zzEndRead here.
*/
//zzStartRead = zzEndRead = s.offset;
zzStartRead = s.offset;
zzEndRead = zzStartRead + s.count - 1;
zzCurrentPos = zzMarkedPos = zzPushbackPos = s.offset;
zzLexicalState = YYINITIAL;
zzReader = reader;
zzAtBOL = true;
zzAtEOF = false;
}
%}
Digit = ([0-9])
Letter = ([A-Za-z])
LetterOrUnderscore = ({Letter}|[_])
LetterOrUnderscoreOrDash = ({LetterOrUnderscore}|[\-])
CSS_SelectorPiece = (("*"|"."|{LetterOrUnderscoreOrDash})({LetterOrUnderscoreOrDash}|"."|{Digit})*)
CSS_PseudoClass = (":"("root"|"nth-child"|"nth-last-child"|"nth-of-type"|"nth-last-of-type"|"first-child"|"last-child"|"first-of-type"|"last-of-type"|"only-child"|"only-of-type"|"empty"|"link"|"visited"|"active"|"hover"|"focus"|"target"|"lang"|"enabled"|"disabled"|"checked"|":first-line"|":first-letter"|":before"|":after"|"not"))
CSS_AtKeyword = ("@"{CSS_SelectorPiece})
CSS_Id = ("#"{CSS_SelectorPiece})
CSS_Separator = ([;\(\)\[\]])
WhiteSpace = ([ \t]+)
MlcStart = ("/*")
MlcEnd = ("*/")
CSS_Property = ([\*]?{LetterOrUnderscoreOrDash}({LetterOrUnderscoreOrDash}|{Digit})*)
CSS_ValueChar = ({LetterOrUnderscoreOrDash}|[\\/])
CSS_Value = ({CSS_ValueChar}*)
CSS_Function = ({CSS_Value}\()
CSS_Digits = ([\-]?{Digit}+([0-9\.]+)?(pt|pc|in|mm|cm|em|ex|px|ms|s|%)?)
CSS_Hex = ("#"[0-9a-fA-F]+)
CSS_Number = ({CSS_Digits}|{CSS_Hex})
URLGenDelim = ([:\/\?#\[\]@])
URLSubDelim = ([\!\$&'\(\)\*\+,;=])
URLUnreserved = ({LetterOrUnderscore}|{Digit}|[\-\.\~])
URLCharacter = ({URLGenDelim}|{URLSubDelim}|{URLUnreserved}|[%])
URLCharacters = ({URLCharacter}*)
URLEndCharacter = ([\/\$]|{Letter}|{Digit})
URL = (((https?|f(tp|ile))"://"|"www.")({URLCharacters}{URLEndCharacter})?)
%state CSS_PROPERTY
%state CSS_VALUE
%state CSS_STRING
%state CSS_CHAR_LITERAL
%state CSS_C_STYLE_COMMENT
%%