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/*
 * 10/03/2007
 *
 * TclTokenMaker.java - Scanner for the Tcl programming language.
 * 
 * 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.*;


/**
 * Scanner for the Tcl programming language.

 *
 * 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 TclTokenMaker.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 TclTokenMaker
%extends AbstractJFlexCTokenMaker
%unicode
%type org.fife.ui.rsyntaxtextarea.Token


%{


	/**
	 * Constructor.  This must be here because JFlex does not generate a
	 * no-parameter constructor.
	 */
	public TclTokenMaker() {
	}


	/**
	 * 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;
	}


	/**
	 * {@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;

		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.
	 * @exception   IOException  if any I/O-Error occurs.
	 */
	private boolean zzRefill() throws java.io.IOException {
		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) throws java.io.IOException {
		// '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;
	}


%}

Letter							= [A-Za-z]
NonzeroDigit						= [1-9]
Digit							= ("0"|{NonzeroDigit})
HexDigit							= ({Digit}|[A-Fa-f])
OctalDigit						= ([0-7])
EscapedSourceCharacter				= ("u"{HexDigit}{HexDigit}{HexDigit}{HexDigit})
NonSeparator						= ([^\t\f\r\n\ \(\)\{\}\[\]\;\,\.\=\>\<\!\~\?\:\+\-\*\/\&\|\^\%\"\']|"#"|"\\")
IdentifierStart					= ({Letter}|"_"|"$")
IdentifierPart						= ({IdentifierStart}|{Digit}|("\\"{EscapedSourceCharacter}))

LineTerminator				= (\n)
WhiteSpace				= ([ \t\f])

UnclosedStringLiteral		= ([\"]([\\].|[^\\\"])*[^\"]?)
StringLiteral				= ({UnclosedStringLiteral}[\"])

LineCommentBegin			= "#"

IntegerHelper1				= (({NonzeroDigit}{Digit}*)|"0")
IntegerHelper2				= ("0"(([xX]{HexDigit}+)|({OctalDigit}*)))
IntegerLiteral				= ({IntegerHelper1}[lL]?)
HexLiteral				= ({IntegerHelper2}[lL]?)
FloatHelper1				= ([fFdD]?)
FloatHelper2				= ([eE][+-]?{Digit}+{FloatHelper1})
FloatLiteral1				= ({Digit}+"."({FloatHelper1}|{FloatHelper2}|{Digit}+({FloatHelper1}|{FloatHelper2})))
FloatLiteral2				= ("."{Digit}+({FloatHelper1}|{FloatHelper2}))
FloatLiteral3				= ({Digit}+{FloatHelper2})
FloatLiteral				= ({FloatLiteral1}|{FloatLiteral2}|{FloatLiteral3}|({Digit}+[fFdD]))
ErrorNumberFormat			= (({IntegerLiteral}|{HexLiteral}|{FloatLiteral}){NonSeparator}+)

Separator					= ([\(\)\{\}\[\]])
Separator2				= ([\;,.])

Operator					= ("="|"!"|"+"|"-"|"*"|"/"|">"=?|"<"=?|"%"|"&"|"|"|"^"|"~")

Identifier				= ({IdentifierStart}{IdentifierPart}*)
ErrorIdentifier			= ({NonSeparator}+)


%%

/* Keywords */
 "append"				{ addToken(Token.RESERVED_WORD); }
 "array"				{ addToken(Token.RESERVED_WORD); }
 "auto_mkindex"				{ addToken(Token.RESERVED_WORD); }
 "concat"				{ addToken(Token.RESERVED_WORD); }
 "console"				{ addToken(Token.RESERVED_WORD); }
 "eval"				{ addToken(Token.RESERVED_WORD); }
 "expr"				{ addToken(Token.RESERVED_WORD); }
 "format"				{ addToken(Token.RESERVED_WORD); }
 "global"				{ addToken(Token.RESERVED_WORD); }
 "set"				{ addToken(Token.RESERVED_WORD); }
 "trace"				{ addToken(Token.RESERVED_WORD); }
 "unset"				{ addToken(Token.RESERVED_WORD); }
 "upvar"				{ addToken(Token.RESERVED_WORD); }
 "join"				{ addToken(Token.RESERVED_WORD); }
 "lappend"				{ addToken(Token.RESERVED_WORD); }
 "lindex"				{ addToken(Token.RESERVED_WORD); }
 "linsert"				{ addToken(Token.RESERVED_WORD); }
 "list"				{ addToken(Token.RESERVED_WORD); }
 "llength"				{ addToken(Token.RESERVED_WORD); }
 "lrange"				{ addToken(Token.RESERVED_WORD); }
 "lreplace"				{ addToken(Token.RESERVED_WORD); }
 "lsearch"				{ addToken(Token.RESERVED_WORD); }
 "lsort"				{ addToken(Token.RESERVED_WORD); }
 "split"				{ addToken(Token.RESERVED_WORD); }
 "scan"				{ addToken(Token.RESERVED_WORD); }
 "string"				{ addToken(Token.RESERVED_WORD); }
 "regexp"				{ addToken(Token.RESERVED_WORD); }
 "regsub"				{ addToken(Token.RESERVED_WORD); }
 "if"				{ addToken(Token.RESERVED_WORD); }
 "else"				{ addToken(Token.RESERVED_WORD); }
 "elseif"				{ addToken(Token.RESERVED_WORD); }
 "switch"				{ addToken(Token.RESERVED_WORD); }
 "for"				{ addToken(Token.RESERVED_WORD); }
 "foreach"				{ addToken(Token.RESERVED_WORD); }
 "while"				{ addToken(Token.RESERVED_WORD); }
 "break"				{ addToken(Token.RESERVED_WORD); }
 "continue"				{ addToken(Token.RESERVED_WORD); }
 "proc"				{ addToken(Token.RESERVED_WORD); }
 "return"				{ addToken(Token.RESERVED_WORD); }
 "source"				{ addToken(Token.RESERVED_WORD); }
 "unkown"				{ addToken(Token.RESERVED_WORD); }
 "uplevel"				{ addToken(Token.RESERVED_WORD); }
 "cd"				{ addToken(Token.RESERVED_WORD); }
 "close"				{ addToken(Token.RESERVED_WORD); }
 "eof"				{ addToken(Token.RESERVED_WORD); }
 "file"				{ addToken(Token.RESERVED_WORD); }
 "flush"				{ addToken(Token.RESERVED_WORD); }
 "gets"				{ addToken(Token.RESERVED_WORD); }
 "glob"				{ addToken(Token.RESERVED_WORD); }
 "open"				{ addToken(Token.RESERVED_WORD); }
 "read"				{ addToken(Token.RESERVED_WORD); }
 "puts"				{ addToken(Token.RESERVED_WORD); }
 "pwd"				{ addToken(Token.RESERVED_WORD); }
 "seek"				{ addToken(Token.RESERVED_WORD); }
 "tell"				{ addToken(Token.RESERVED_WORD); }
 "catch"				{ addToken(Token.RESERVED_WORD); }
 "error"				{ addToken(Token.RESERVED_WORD); }
 "exec"				{ addToken(Token.RESERVED_WORD); }
 "pid"				{ addToken(Token.RESERVED_WORD); }
 "after"				{ addToken(Token.RESERVED_WORD); }
 "time"				{ addToken(Token.RESERVED_WORD); }
 "exit"				{ addToken(Token.RESERVED_WORD); }
 "history"				{ addToken(Token.RESERVED_WORD); }
 "rename"				{ addToken(Token.RESERVED_WORD); }
 "info"				{ addToken(Token.RESERVED_WORD); }
 "ceil"				{ addToken(Token.RESERVED_WORD); }
 "floor"				{ addToken(Token.RESERVED_WORD); }
 "round"				{ addToken(Token.RESERVED_WORD); }
 "incr"				{ addToken(Token.RESERVED_WORD); }
 "hypot"				{ addToken(Token.RESERVED_WORD); }
 "abs"				{ addToken(Token.RESERVED_WORD); }
 "acos"				{ addToken(Token.RESERVED_WORD); }
 "cos"				{ addToken(Token.RESERVED_WORD); }
 "cosh"				{ addToken(Token.RESERVED_WORD); }
 "asin"				{ addToken(Token.RESERVED_WORD); }
 "sin"				{ addToken(Token.RESERVED_WORD); }
 "sinh"				{ addToken(Token.RESERVED_WORD); }
 "atan"				{ addToken(Token.RESERVED_WORD); }
 "atan2"				{ addToken(Token.RESERVED_WORD); }
 "tan"				{ addToken(Token.RESERVED_WORD); }
 "tanh"				{ addToken(Token.RESERVED_WORD); }
 "log"				{ addToken(Token.RESERVED_WORD); }
 "log10"				{ addToken(Token.RESERVED_WORD); }
 "fmod"				{ addToken(Token.RESERVED_WORD); }
 "pow"				{ addToken(Token.RESERVED_WORD); }
 "hypot"				{ addToken(Token.RESERVED_WORD); }
 "sqrt"				{ addToken(Token.RESERVED_WORD); }
 "double"				{ addToken(Token.RESERVED_WORD); }
 "int"				{ addToken(Token.RESERVED_WORD); }

 "bind"				{ addToken(Token.RESERVED_WORD); }
 "button"				{ addToken(Token.RESERVED_WORD); }
 "canvas"				{ addToken(Token.RESERVED_WORD); }
 "checkbutton"				{ addToken(Token.RESERVED_WORD); }
 "destroy"				{ addToken(Token.RESERVED_WORD); }
 "entry"				{ addToken(Token.RESERVED_WORD); }
 "focus"				{ addToken(Token.RESERVED_WORD); }
 "frame"				{ addToken(Token.RESERVED_WORD); }
 "grab"				{ addToken(Token.RESERVED_WORD); }
 "image"				{ addToken(Token.RESERVED_WORD); }
 "label"				{ addToken(Token.RESERVED_WORD); }
 "listbox"				{ addToken(Token.RESERVED_WORD); }
 "lower"				{ addToken(Token.RESERVED_WORD); }
 "menu"				{ addToken(Token.RESERVED_WORD); }
 "menubutton"				{ addToken(Token.RESERVED_WORD); }
 "message"				{ addToken(Token.RESERVED_WORD); }
 "option"				{ addToken(Token.RESERVED_WORD); }
 "pack"				{ addToken(Token.RESERVED_WORD); }
 "placer"				{ addToken(Token.RESERVED_WORD); }
 "radiobutton"				{ addToken(Token.RESERVED_WORD); }
 "raise"				{ addToken(Token.RESERVED_WORD); }
 "scale"				{ addToken(Token.RESERVED_WORD); }
 "scrollbar"				{ addToken(Token.RESERVED_WORD); }
 "selection"				{ addToken(Token.RESERVED_WORD); }
 "send"				{ addToken(Token.RESERVED_WORD); }
 "text"				{ addToken(Token.RESERVED_WORD); }
 "tk"				{ addToken(Token.RESERVED_WORD); }
 "tkerror"				{ addToken(Token.RESERVED_WORD); }
 "tkwait"				{ addToken(Token.RESERVED_WORD); }
 "toplevel"				{ addToken(Token.RESERVED_WORD); }
 "update"				{ addToken(Token.RESERVED_WORD); }
 "winfo"				{ addToken(Token.RESERVED_WORD); }
 "wm"				{ addToken(Token.RESERVED_WORD); }


 {

	{LineTerminator}				{ addNullToken(); return firstToken; }

	{Identifier}					{ addToken(Token.IDENTIFIER); }

	{WhiteSpace}+					{ addToken(Token.WHITESPACE); }

	/* String/Character literals. */
	{StringLiteral}				{ addToken(Token.LITERAL_STRING_DOUBLE_QUOTE); }
	{UnclosedStringLiteral}			{ addToken(Token.ERROR_STRING_DOUBLE); addNullToken(); return firstToken; }

	/* Comment literals. */
	{LineCommentBegin}.*			{ addToken(Token.COMMENT_EOL); addNullToken(); return firstToken; }

	/* Separators. */
	{Separator}					{ addToken(Token.SEPARATOR); }
	{Separator2}					{ addToken(Token.IDENTIFIER); }

	/* Operators. */
	{Operator}					{ addToken(Token.OPERATOR); }

	/* Numbers */
	{IntegerLiteral}				{ addToken(Token.LITERAL_NUMBER_DECIMAL_INT); }
	{HexLiteral}					{ addToken(Token.LITERAL_NUMBER_HEXADECIMAL); }
	{FloatLiteral}					{ addToken(Token.LITERAL_NUMBER_FLOAT); }
	{ErrorNumberFormat}				{ addToken(Token.ERROR_NUMBER_FORMAT); }

	{ErrorIdentifier}				{ addToken(Token.ERROR_IDENTIFIER); }

	/* Ended with a line not in a string or comment. */
	<>						{ addNullToken(); return firstToken; }

	/* Catch any other (unhandled) characters and flag them as bad. */
	.							{ addToken(Token.ERROR_IDENTIFIER); }

}




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