/*
* Copyright 2004-2014 SmartBear Software
*
* Licensed under the EUPL, Version 1.1 or - as soon as they will be approved by the European Commission - subsequent
* versions of the EUPL (the "Licence");
* You may not use this work except in compliance with the Licence.
* You may obtain a copy of the Licence at:
*
* http://ec.europa.eu/idabc/eupl
*
* Unless required by applicable law or agreed to in writing, software distributed under the Licence is
* distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the Licence for the specific language governing permissions and limitations
* under the Licence.
*/
package org.syntax.jedit;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import javax.swing.text.Segment;
import javax.swing.text.TabExpander;
import javax.swing.text.Utilities;
import org.syntax.jedit.tokenmarker.Token;
/**
* Class with several utility functions used by jEdit's syntax colorizing
* subsystem.
*
* @author Slava Pestov
* @version $Id$
*/
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() {
}
}