function parseTextBlock()

in v4/zh/builder/lib/etpl.js [337:387]
43 lines of code
16 McCabe index (conditional complexity)

    function parseTextBlock(source, open, close, greedy, onInBlock, onOutBlock) {
        var closeLen = close.length;
        var texts = source.split(open);
        var level = 0;
        var buf = [];

        for (var i = 0, len = texts.length; i < len; i++) {
            var text = texts[i];

            if (i) {
                var openBegin = 1;
                level++;
                /* eslint-disable no-constant-condition */
                while (1) {
                    var closeIndex = text.indexOf(close);
                    if (closeIndex < 0) {
                        buf.push(level > 1 && openBegin ? open : '', text);
                        break;
                    }

                    level = greedy ? level - 1 : 0;
                    buf.push(
                        level > 0 && openBegin ? open : '',
                        text.slice(0, closeIndex),
                        level > 0 ? close : ''
                    );
                    text = text.slice(closeIndex + closeLen);
                    openBegin = 0;

                    if (level === 0) {
                        break;
                    }
                }
                /* eslint-enable no-constant-condition */

                if (level === 0) {
                    onInBlock(buf.join(''));
                    onOutBlock(text);
                    buf = [];
                }
            }
            else {
                text && onOutBlock(text);
            }
        }

        if (level > 0 && buf.length > 0) {
            onOutBlock(open);
            onOutBlock(buf.join(''));
        }
    }