/*
* RapidMiner
*
* Copyright (C) 2001-2008 by Rapid-I and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapid-i.com
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*/
package com.rapidminer.gui.tools.syntax;
/*
* SyntaxUtilities.java - Utility functions used by syntax colorizing
* Copyright (C) 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.
*/
import javax.swing.text.*;
import java.awt.*;
/**
* Class with several utility functions used by jEdit's syntax colorizing subsystem.
*
* @author Slava Pestov, Ingo Mierswa
* @version $Id: SyntaxUtilities.java,v 1.3 2008/05/09 19:22:56 ingomierswa Exp $
*/
public class SyntaxUtilities {
/**
* Checks if a subregion of a <code>Segment</code> is equal to a string.
*
* @param ignoreCase
* True if case should be ignored, false otherwise
* @param text
* The segment
* @param offset
* The offset into the segment
* @param match
* The string to match
*/
public static boolean regionMatches(boolean ignoreCase, Segment text, int offset, String match) {
int length = offset + match.length();
char[] textArray = text.array;
if (length > text.offset + text.count)
return false;
for (int i = offset, j = 0; i < length; i++, j++) {
char c1 = textArray[i];
char c2 = match.charAt(j);
if (ignoreCase) {
c1 = Character.toUpperCase(c1);
c2 = Character.toUpperCase(c2);
}
if (c1 != c2)
return false;
}
return true;
}
/**
* Checks if a subregion of a <code>Segment</code> is equal to a character array.
*
* @param ignoreCase
* True if case should be ignored, false otherwise
* @param text
* The segment
* @param offset
* The offset into the segment
* @param match
* The character array to match
*/
public static boolean regionMatches(boolean ignoreCase, Segment text, int offset, char[] match) {
int length = offset + match.length;
char[] textArray = text.array;
if (length > text.offset + text.count)
return false;
for (int i = offset, j = 0; i < length; i++, j++) {
char c1 = textArray[i];
char c2 = match[j];
if (ignoreCase) {
c1 = Character.toUpperCase(c1);
c2 = Character.toUpperCase(c2);
}
if (c1 != c2)
return false;
}
return true;
}
/**
* Returns the default style table. This can be passed to the <code>setStyles()</code> method of <code>SyntaxDocument</code> to use the default syntax styles.
*/
public static SyntaxStyle[] getDefaultSyntaxStyles() {
SyntaxStyle[] styles = new SyntaxStyle[Token.ID_COUNT];
styles[Token.COMMENT1] = new SyntaxStyle(Color.black, true, false);
styles[Token.COMMENT2] = new SyntaxStyle(new Color(0x990033), true, false);
styles[Token.KEYWORD1] = new SyntaxStyle(Color.black, false, true);
styles[Token.KEYWORD2] = new SyntaxStyle(Color.magenta, false, false);
styles[Token.KEYWORD3] = new SyntaxStyle(new Color(0x009600), false, false);
styles[Token.LITERAL1] = new SyntaxStyle(new Color(0x650099), false, false);
styles[Token.LITERAL2] = new SyntaxStyle(new Color(0x650099), false, true);
styles[Token.LABEL] = new SyntaxStyle(new Color(0x990033), false, true);
styles[Token.OPERATOR] = new SyntaxStyle(Color.black, false, true);
styles[Token.INVALID] = new SyntaxStyle(Color.red, false, true);
return styles;
}
/**
* Paints the specified line onto the graphics context. Note that this method munges the offset and count values of the segment.
*
* @param line
* The line segment
* @param tokens
* The token list for the line
* @param styles
* The syntax style list
* @param expander
* The tab expander used to determine tab stops. May be null
* @param gfx
* The graphics context
* @param x
* The x co-ordinate
* @param y
* The y co-ordinate
* @return The x co-ordinate, plus the width of the painted string
*/
public static int paintSyntaxLine(Segment line, Token tokens, SyntaxStyle[] styles, TabExpander expander, Graphics gfx, int x, int y) {
Font defaultFont = gfx.getFont();
Color defaultColor = gfx.getColor();
int offset = 0;
for (;;) {
byte id = tokens.id;
if (id == Token.END)
break;
int length = tokens.length;
if (id == Token.NULL) {
if (!defaultColor.equals(gfx.getColor()))
gfx.setColor(defaultColor);
if (!defaultFont.equals(gfx.getFont()))
gfx.setFont(defaultFont);
} else
styles[id].setGraphicsFlags(gfx, defaultFont);
line.count = length;
x = Utilities.drawTabbedText(line, x, y, gfx, expander, 0);
line.offset += length;
offset += length;
tokens = tokens.next;
}
return x;
}
// private members
private SyntaxUtilities() {
}
}