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Token.java
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/*
* Token.java - Generic token
* Copyright (C) 1998, 1999 Slava Pestov
*
* You may use and modify this package for any purpose. Redistribution is
* permitted, in both source and binary form, provided that this notice
* remains intact in all source distributions of this package.
*/
package processing.app.syntax;
/**
* A linked list of tokens. Each token has three fields - a token
* identifier, which is a byte value that can be looked up in the
* array returned by <code>SyntaxDocument.getColors()</code>
* to get a color value, a length value which is the length of the
* token in the text, and a pointer to the next token in the list.
*
* @author Slava Pestov
* @version $Id$
*/
public class Token {
/** Normal text token id. This should be used to mark normal text. */
public static final byte NULL = 0;
/** This can be used to mark a comment. */
public static final byte COMMENT1 = 1;
/** This can be used to mark a comment. */
public static final byte COMMENT2 = 2;
/** Strings in quotes */
public static final byte LITERAL1 = 3;
/** Constants (QUARTER_PI, CORNERS, etc.) */
public static final byte LITERAL2 = 4;
/**
* Label token id. This can be used to mark labels
* (eg, C mode uses this to mark ...: sequences)
*/
public static final byte LABEL = 5;
/** Keywords (void, int, boolean, etc.) */
public static final byte KEYWORD1 = 6;
/** Fields [variables within a class] */
public static final byte KEYWORD2 = 7;
/** Loop/function-like blocks (for, while, etc.) */
public static final byte KEYWORD3 = 8;
/** Processing variables (width, height, focused, etc.) */
public static final byte KEYWORD4 = 9;
/** Datatypes (int, boolean, etc.) */
public static final byte KEYWORD5 = 10;
/** Keywords which can be followed by parenthesis */
public static final byte KEYWORD6 = 11;
/** Functions */
public static final byte FUNCTION1 = 12;
/** Methods (functions inside a class) */
public static final byte FUNCTION2 = 13;
/** Loop/function-like blocks (for, while, etc.) */
public static final byte FUNCTION3 = 14;
/** Built-in Processing functions (setup, draw, mouseDragged). */
public static final byte FUNCTION4 = 15;
/**
* Operator token id. This can be used to mark an
* operator. (eg, SQL mode marks +, -, etc with this
* token type)
*/
public static final byte OPERATOR = 16;
/**
* Invalid token id. This can be used to mark invalid
* or incomplete tokens, so the user can easily spot
* syntax errors.
*/
public static final byte INVALID = 17;
/** The total number of defined token ids. */
public static final byte ID_COUNT = INVALID + 1;
/**
* The first id that can be used for internal state
* in a token marker.
*/
public static final byte INTERNAL_FIRST = 100;
/**
* The last id that can be used for internal state
* in a token marker.
*/
public static final byte INTERNAL_LAST = 126;
/**
* The token type, that along with a length of 0
* marks the end of the token list.
*/
public static final byte END = 127;
/**
* The length of this token.
*/
public int length;
/**
* The id of this token.
*/
public byte id;
/**
* The next token in the linked list.
*/
public Token next;
/**
* Creates a new token.
* @param length The length of the token
* @param id The id of the token
*/
public Token(int length, byte id) {
this.length = length;
this.id = id;
}
/**
* Returns a string representation of this token.
*/
public String toString() {
return "[id=" + id + ",length=" + length + "]";
}
}