Code
private Pattern getPattern() {
String text = field.getText();
if (text == null || text.isEmpty()) {
return null;
}
try {
String cw = checkWord.isSelected() ? "\\b" : "";
String pattern = String.format("%s%s%s", cw, text, cw);
int flags = checkCase.isSelected()
? 0
: Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE;
return Pattern.compile(pattern, flags);
} catch (PatternSyntaxException ex) {
field.setBackground(WARNING_COLOR);
return null;
}
}
private void changeHighlight() {
field.setBackground(Color.WHITE);
Highlighter highlighter = textArea.getHighlighter();
highlighter.removeAllHighlights();
Document doc = textArea.getDocument();
try {
Pattern pattern = getPattern();
if (pattern != null) {
Matcher matcher = pattern.matcher(doc.getText(0, doc.getLength()));
int pos = 0;
while (matcher.find(pos)) {
int start = matcher.start();
int end = matcher.end();
highlighter.addHighlight(start, end, highlightPainter);
pos = end;
}
}
JLabel label = layerUI.hint;
Highlighter.Highlight[] array = highlighter.getHighlights();
int hits = array.length;
if (hits == 0) {
current = -1;
label.setOpaque(true);
} else {
current = (current + hits) % hits;
label.setOpaque(false);
Highlighter.Highlight hh = highlighter.getHighlights()[current];
highlighter.removeHighlight(hh);
highlighter.addHighlight(
hh.getStartOffset(), hh.getEndOffset(), currentPainter);
scrollToCenter(textArea, hh.getStartOffset());
}
label.setText(String.format("%02d / %02d%n", current + 1, hits));
} catch (BadLocationException e) {
e.printStackTrace();
}
field.repaint();
}
References
