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RSyntaxTextArea is the syntax highlighting text editor for Swing applications. Features include syntax highlighting for 40+ languages, code folding, code completion, regex find and replace, macros, code templates, undo/redo, line numbering and bracket matching.
/*
* 02/15/2005
*
* SQLTokenMaker.java - Scanner for SQL.
*
* 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 generates tokens representing a text stream as SQL.
*
* 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
SQLTokenMaker.java file will contain two
* definitions of both zzRefill and yyreset.
* 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.
* - You should also change the declaration/definition of zzBuffer to NOT
* be initialized. This is a needless memory allocation for us since we
* will be pointing the array somewhere else anyway.
* - You should NOT call
yylex() on the generated scanner
* directly; rather, you should use getTokenList as you would
* with any other TokenMaker instance.
*
*
* @author Robert Futrell
* @version 0.5
*
*/
%%
%public
%class SQLTokenMaker
%extends AbstractJFlexTokenMaker
%unicode
%ignorecase
%type org.fife.ui.rsyntaxtextarea.Token
%{
/**
* Constructor. This must be here because JFlex does not generate a
* no-parameter constructor.
*/
public SQLTokenMaker() {
super();
}
/**
* 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;
}
/**
* Overridden to return true so paren matching occurs for
* SQL.
*
* @return true always.
*/
@Override
public boolean getCurlyBracesDenoteCodeBlocks(int languageIndex) {
return true;
}
/**
* {@inheritDoc}
*/
@Override
public String[] getLineCommentStartAndEnd(int languageIndex) {
return new String[] { "--", null };
}
/**
* 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;
// Start off in the proper state.
int state = Token.NULL;
switch (initialTokenType) {
case Token.LITERAL_STRING_DOUBLE_QUOTE:
state = STRING;
start = text.offset;
break;
case Token.LITERAL_CHAR:
state = CHAR;
start = text.offset;
break;
case Token.COMMENT_MULTILINE:
state = MLC;
start = text.offset;
break;
default:
state = Token.NULL;
}
s = text;
try {
yyreset(zzReader);
yybegin(state);
return yylex();
} catch (IOException ioe) {
ioe.printStackTrace();
return new TokenImpl();
}
}
/**
* 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;
}
%}
LineTerminator = ([\n])
Letter = ([A-Za-z])
Digit = ([0-9])
Whitespace = ([ \t]+)
IdentifierStart = ({Letter})
IdentifierPart = ({IdentifierStart}|{Digit}|[_])
Identifier = ({IdentifierStart}{IdentifierPart}*)
Operator = (">="|"<="|"<>"|">"|"<"|"="|"+"|"-"|"*"|"/")
Separator = ([\(\)])
Parameter = ([:]{Identifier})
Integer = ({Digit}+)
Float = (({Digit}+[.]{Digit}*)|([.]{Digit}*))
ApproxNum = (({Digit}+[eE][+-]?{Digit}+)|({Digit}+[.]{Digit}*[eE][+-]?[0-9]+)|([.][0-9]*[eE][+-]?[0-9]+))
CommentBegin = ("--")
Comment = ({CommentBegin}.*)
MLCBegin = "/*"
MLCEnd = "*/"
%state STRING
%state CHAR
%state MLC
%%
{
/* Keywords */
"ADD" |
"ALL" |
"ALTER" |
"AND" |
"ANY" |
"AS" |
"ASC" |
"AUTOINCREMENT" |
"AVA" |
"BETWEEN" |
"BINARY" |
"BIT" |
"BOOLEAN" |
"BY" |
"BYTE" |
"CHAR" |
"CHARACTER" |
"COLUMN" |
"CONSTRAINT" |
"COUNT" |
"COUNTER" |
"CREATE" |
"CURRENCY" |
"DATABASE" |
"DATE" |
"DATETIME" |
"DELETE" |
"DESC" |
"DISALLOW" |
"DISTINCT" |
"DISTINCTROW" |
"DOUBLE" |
"DROP" |
"EXISTS" |
"FLOAT" |
"FLOAT4" |
"FLOAT8" |
"FOREIGN" |
"FROM" |
"GENERAL" |
"GROUP" |
"GUID" |
"HAVING" |
"INNER" |
"INSERT" |
"IGNORE" |
"IMP" |
"IN" |
"INDEX" |
"INT" |
"INTEGER" |
"INTEGER1" |
"INTEGER2" |
"INTEGER4" |
"INTO" |
"IS" |
"JOIN" |
"KEY" |
"LEFT" |
"LEVEL" |
"LIKE" |
"LOGICAL" |
"LONG" |
"LONGBINARY" |
"LONGTEXT" |
"MAX" |
"MEMO" |
"MIN" |
"MOD" |
"MONEY" |
"NOT" |
"NULL" |
"NUMBER" |
"NUMERIC" |
"OLEOBJECT" |
"ON" |
"OPTION" |
"OR" |
"ORDER" |
"OUTER" |
"OWNERACCESS" |
"PARAMETERS" |
"PASSWORD" |
"PERCENT" |
"PIVOT" |
"PRIMARY" |
"REAL" |
"REFERENCES" |
"RIGHT" |
"SELECT" |
"SET" |
"SHORT" |
"SINGLE" |
"SMALLINT" |
"SOME" |
"STDEV" |
"STDEVP" |
"STRING" |
"SUM" |
"TABLE" |
"TABLEID" |
"TEXT" |
"TIME" |
"TIMESTAMP" |
"TOP" |
"TRANSFORM" |
"TYPE" |
"UNION" |
"UNIQUE" |
"UPDATE" |
"USER" |
"VALUE" |
"VALUES" |
"VAR" |
"VARBINARY" |
"VARCHAR" |
"VARP" |
"WHERE" |
"WITH" |
"YESNO" { addToken(Token.RESERVED_WORD); }
/* SQL99 aggregate functions */
"AVG" |
"COUNT" |
"MIN" |
"MAX" |
"SUM" { addToken(Token.FUNCTION); }
/* SQL99 built-in scalar functions */
"CURRENT_DATE" |
"CURRENT_TIME" |
"CURRENT_TIMESTAMP" |
"CURRENT_USER" |
"SESSION_USER" |
"SYSTEM_USER" { addToken(Token.FUNCTION); }
/* SQL99 numeric scalar functions */
"BIT_LENGTH" |
"CHAR_LENGTH" |
"EXTRACT" |
"OCTET_LENGTH" |
"POSITION" { addToken(Token.FUNCTION); }
/* SQL99 string functions */
"CONCATENATE" |
"CONVERT" |
"LOWER" |
"SUBSTRING" |
"TRANSLATE" |
"TRIM" |
"UPPER" { addToken(Token.FUNCTION); }
{LineTerminator} { addNullToken(); return firstToken; }
{Identifier} { addToken(Token.IDENTIFIER); }
";" { addToken(Token.IDENTIFIER); }
{Parameter} { addToken(Token.IDENTIFIER); }
{Comment} { addToken(Token.COMMENT_EOL); }
{MLCBegin} { start = zzMarkedPos-2; yybegin(MLC); }
{Whitespace} { addToken(Token.WHITESPACE); }
{Operator} { addToken(Token.OPERATOR); }
{Separator} { addToken(Token.SEPARATOR); }
{Integer} { addToken(Token.LITERAL_NUMBER_DECIMAL_INT); }
{Float} { addToken(Token.LITERAL_NUMBER_FLOAT); }
{ApproxNum} { addToken(Token.LITERAL_NUMBER_FLOAT); }
"\"" { start = zzMarkedPos-1; yybegin(STRING); }
"\'" { start = zzMarkedPos-1; yybegin(CHAR); }
"["[^\]]*"]" { addToken(Token.PREPROCESSOR); }
"["[^\]]* { addToken(Token.ERROR_IDENTIFIER); addNullToken(); return firstToken; }
<> { addNullToken(); return firstToken; }
/* Catch any other (unhandled) characters and flag them as OK; */
/* I don't know enough about SQL to know what's really invalid. */
. { addToken(Token.IDENTIFIER); }
}
{
[^\n\"]+ {}
\n { addToken(start,zzStartRead-1, Token.LITERAL_STRING_DOUBLE_QUOTE); return firstToken; }
"\"\"" {}
"\"" { yybegin(YYINITIAL); addToken(start,zzStartRead, Token.LITERAL_STRING_DOUBLE_QUOTE); }
<> { addToken(start,zzStartRead-1, Token.LITERAL_STRING_DOUBLE_QUOTE); return firstToken; }
}
{
[^\n\']+ {}
\n { addToken(start,zzStartRead-1, Token.LITERAL_CHAR); return firstToken; }
"\'\'" {}
"\'" { yybegin(YYINITIAL); addToken(start,zzStartRead, Token.LITERAL_CHAR); }
<> { addToken(start,zzStartRead-1, Token.LITERAL_CHAR); return firstToken; }
}
{
[^\n\*]+ {}
\n { addToken(start,zzStartRead-1, Token.COMMENT_MULTILINE); return firstToken; }
{MLCEnd} { yybegin(YYINITIAL); addToken(start,zzStartRead+1, Token.COMMENT_MULTILINE); }
\* {}
<> { addToken(start,zzStartRead-1, Token.COMMENT_MULTILINE); return firstToken; }
}