private doHighlights()

in src/main/groovy/swing/RegexCoach.groovy [89:125]

• 30 lines of code
• 7 McCabe index (conditional complexity)

    private doHighlights() {
        try {
            resetView()
            // note: get the text from the underlying document,
            // otherwise carriage return/line feeds different when using the JTextPane text
            def regex = swing.regexPane.document.getText(0, swing.regexPane.document.length)
            def target = swing.targetPane.document.getText(0, swing.targetPane.document.length)

            def matcher = (target =~ regex)

            // scan past the matches before the match we want
            int scan = 0
            while (scan < scanIndex) {
                matcher.find()
                scan++
            }
            if (matcher.find()) {
                // highlight any captured groups
                int i = 0
                while (i++ < matcher.groupCount()) {
                    swing.targetPane.highlighter.addHighlight(matcher.start(i), matcher.end(i), orange)
                }
                // highlight whole match
                swing.targetPane.highlighter.addHighlight(matcher.start(), matcher.end(), yellow)
                if (regex.length() != 0) {
                    swing.targetStatus.text = "Match #${scanIndex + 1} from ${matcher.start()} to ${matcher.end()}."
                }
            } else { // not found
                scanIndex = Math.max(scan - 1, 0)
                if (scanIndex > 0) {doHighlights()}
                swing.targetStatus.text = "No match."
            }
        } catch (PatternSyntaxException e) {
            swing.regexPane.highlighter.addHighlight(e.index, e.index + 2, red)
            swing.regexStatus.text = e.description
        }
    }