So I got this code from this link on SO and I got it to do what I wanted, but after I backspace a word of one color, all preceding words are that color, too.
result without glitch activated
Result: These words are yellow: yel, yw. This word is red: rd. These words are blue: blu, be.
Result: These words are yellow: yel, yw. This word is red: rd. These words are blue: blu, be.
I backspaced one of the yellow words. Now all of my words are yellow.
Code:
package test;
import java.awt.Color;
import java.awt.Font;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.DefaultStyledDocument;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyleContext;
public class ChangeFontColor extends JFrame{
private static final long serialVersionUID = 2121337395232340746L;
public ChangeFontColor() {
super("Change Font Color");
setDefaultCloseOperation(EXIT_ON_CLOSE);
setSize(1100, 700);
setLocationRelativeTo(null);
final StyleContext cont = StyleContext.getDefaultStyleContext();
final AttributeSet attrRed = cont.addAttribute(cont.getEmptySet(), StyleConstants.Foreground, Color.RED);
final AttributeSet attrYel = cont.addAttribute(cont.getEmptySet(), StyleConstants.Foreground, Color.YELLOW);
final AttributeSet attrBlu = cont.addAttribute(cont.getEmptySet(), StyleConstants.Foreground, Color.BLUE);
DefaultStyledDocument doc = new DefaultStyledDocument() {
private static final long serialVersionUID = -3442280878563016288L;
public void insertString (int offset, String str, AttributeSet a) throws BadLocationException {
super.insertString(offset, str, a);
String text = getText(0, getLength());
int before = findLastNonWordChar(text, offset);
if (before < 0)
before = 0;
int after = findFirstNonWordChar(text, offset + str.length());
int wordL = before;
int wordR = before;
while(wordR <= after) {
if(wordR == after || String.valueOf(text.charAt(wordR)).matches("\\W")) {
if(text.substring(wordL, wordR).matches("(\\W)*(yellow|yel|yw)")){
setCharacterAttributes(wordL, wordR - wordL, attrYel, true);
}else if((text.substring(wordL, wordR).matches("(\\W)*(red|rd)"))){
setCharacterAttributes(wordL, wordR - wordL, attrRed, true);
}else if((text.substring(wordL, wordR).matches("(\\W)*(blue|blu|be)"))){
setCharacterAttributes(wordL, wordR - wordL, attrBlu, true);
}
wordL = wordR;
}
wordR++;
}
}
public void remove (int offs, int len) throws BadLocationException {
super.remove(offs, len);
String text = getText(0, getLength());
int before = findLastNonWordChar(text, offs);
if (before < 0)
before = 0;
int after = findFirstNonWordChar(text, offs);
if(text.substring(before, after).matches("(\\W)*(yellow|yel|yw)")) {
setCharacterAttributes(before, after - before, attrYel, true);
}else if((text.substring(before, after).matches("(\\W)*(red|rd)"))){
setCharacterAttributes(before, after - before, attrRed, true);
}else if((text.substring(before, after).matches("(\\W)*(blue|blu|be)"))){
setCharacterAttributes(before, after - before, attrBlu, true);
}
}
};
JTextPane txt = new JTextPane(doc);
txt.setBackground(Color.DARK_GRAY);
txt.setForeground(Color.WHITE);
txt.setCaretColor(Color.WHITE);
txt.setFont(new Font("Serif", Font.PLAIN, 18));
add(new JScrollPane(txt));
setVisible(true);
}
private int findLastNonWordChar (String text, int index) {
while (--index >= 0) {
if (String.valueOf(text.charAt(index)).matches("\\W")) {
break;
}
}
return index;
}
private int findFirstNonWordChar (String text, int index) {
while (index < text.length()) {
if (String.valueOf(text.charAt(index)).matches("\\W")) {
break;
}
index++;
}
return index;
}
public static void main (String args[]) {
new ChangeFontColor();
}
}
I found a solution:
package test;
import java.awt.Color;
import java.awt.Font;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.DefaultStyledDocument;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyleContext;
public class ChangeFontColor extends JFrame{
private static final long serialVersionUID = 2121337395232340746L;
public ChangeFontColor() {
super("Change Font Color");
setDefaultCloseOperation(EXIT_ON_CLOSE);
setSize(1100, 700);
setLocationRelativeTo(null);
final StyleContext cont = StyleContext.getDefaultStyleContext();
final AttributeSet attrRed = cont.addAttribute(cont.getEmptySet(), StyleConstants.Foreground, Color.RED);
final AttributeSet attrYel = cont.addAttribute(cont.getEmptySet(), StyleConstants.Foreground, Color.YELLOW);
final AttributeSet attrBlu = cont.addAttribute(cont.getEmptySet(), StyleConstants.Foreground, Color.BLUE);
final AttributeSet attrWhite = cont.addAttribute(cont.getEmptySet(), StyleConstants.Foreground, Color.WHITE);
DefaultStyledDocument doc = new DefaultStyledDocument() {
private static final long serialVersionUID = -3442280878563016288L;
public void insertString (int offset, String str, AttributeSet a) throws BadLocationException {
super.insertString(offset, str, a);
String text = getText(0, getLength());
int before = findLastNonWordChar(text, offset);
if (before < 0)
before = 0;
int after = findFirstNonWordChar(text, offset + str.length());
int wordL = before;
int wordR = before;
while(wordR <= after) {
if(wordR == after || String.valueOf(text.charAt(wordR)).matches("\\W")) {
if(text.substring(wordL, wordR).matches("(\\W)*(yellow|yel|yw)")){
setCharacterAttributes(wordL, wordR - wordL, attrYel, true);
}else if((text.substring(wordL, wordR).matches("(\\W)*(red|rd)"))){
setCharacterAttributes(wordL, wordR - wordL, attrRed, true);
}else if((text.substring(wordL, wordR).matches("(\\W)*(blue|blu|be)"))){
setCharacterAttributes(wordL, wordR - wordL, attrBlu, true);
}else{
setCharacterAttributes(wordL, wordR - wordL, attrWhite, true);
}
wordL = wordR;
}
wordR++;
}
}
public void remove (int offs, int len) throws BadLocationException {
super.remove(offs, len);
String text = getText(0, getLength());
int before = findLastNonWordChar(text, offs);
if (before < 0)
before = 0;
int after = findFirstNonWordChar(text, offs);
if(text.substring(before, after).matches("(\\W)*(yellow|yel|yw)")) {
setCharacterAttributes(before, after - before, attrWhite, true);
}else if((text.substring(before, after).matches("(\\W)*(red|rd)"))){
setCharacterAttributes(before, after - before, attrRed, true);
}else if((text.substring(before, after).matches("(\\W)*(blue|blu|be)"))){
setCharacterAttributes(before, after - before, attrBlu, true);
}else{
setCharacterAttributes(before, after - before, attrWhite, true);
}
}
};
JTextPane txt = new JTextPane(doc);
txt.setBackground(Color.DARK_GRAY);
txt.setForeground(Color.WHITE);
txt.setCaretColor(Color.WHITE);
txt.setFont(new Font("Serif", Font.PLAIN, 18));
add(new JScrollPane(txt));
setVisible(true);
}
private int findLastNonWordChar (String text, int index) {
while (--index >= 0) {
if (String.valueOf(text.charAt(index)).matches("\\W")) {
break;
}
}
return index;
}
private int findFirstNonWordChar (String text, int index) {
while (index < text.length()) {
if (String.valueOf(text.charAt(index)).matches("\\W")) {
break;
}
index++;
}
return index;
}
public static void main (String args[]) {
new ChangeFontColor();
}
}
