Function visibleLines

tools/pythonauto/static/codemirrorepl/codemirrorepl.js:1119–1125

()

        }

        function visibleLines() {
            var lh = textHeight(), top = scroller.scrollTop - paddingTop();
            var fromHeight = Math.max(0, Math.floor(top / lh));
            var toHeight = Math.ceil((top + scroller.clientHeight) / lh);
            return {from: lineAtHeight(doc, fromHeight),
                to: lineAtHeight(doc, toHeight)};
        }
        // Uses a set of changes plus the current scroll position to
        // determine which DOM updates have to be made, and makes the
        // updates.