/*jslint eqeq: true, plusplus: true, undef: true, sloppy: true, vars: true, forin: true, nomen: true */
(function ($) {

    $.mobiscroll.classes.Scroller = function (elem, settings) {
        var m,
            hi,
            v,
            dw,
            persp,
            overlay,
            ww, // Window width
            wh, // Window height
            mw, // Modal width
            mh, // Modal height
            lock,
            anim,
            theme,
            lang,
            click,
            hasButtons,
            scrollable,
            moved,
            start,
            startTime,
            stop,
            p,
            min,
            max,
            modal,
            target,
            index,
            timer,
            readOnly,
            preventChange,
            preventPos,
            wndw,
            doc,
            buttons,
            btn,
            that = this,
            e = elem,
            elm = $(e),
            s = extend({}, defaults),
            pres = {},
            iv = {},
            pos = {},
            pixels = {},
            wheels = [],
            elmList = [],
            input = elm.is('input'),
            visible = false,
            onStart = function (e) {
                // Scroll start
                if (testTouch(e) && !move && !click && !btn && !isReadOnly(this)) {
                    // Prevent touch highlight
                    e.preventDefault();

                    move = true;
                    scrollable = s.mode != 'clickpick';
                    target = $('.dw-ul', this);
                    setGlobals(target);
                    moved = iv[index] !== undefined; // Don't allow tap, if still moving
                    p = moved ? getCurrentPosition(target) : pos[index];
                    start = getCoord(e, 'Y');
                    startTime = new Date();
                    stop = start;
                    scroll(target, index, p, 0.001);

                    if (scrollable) {
                        target.closest('.dwwl').addClass('dwa');
                    }

                    $(document).on(MOVE_EVENT, onMove).on(END_EVENT, onEnd);
                }
            },
            onMove = function (e) {
                if (scrollable) {
                    // Prevent scroll
                    e.preventDefault();
                    e.stopPropagation();
                    stop = getCoord(e, 'Y');
                    scroll(target, index, constrain(p + (start - stop) / hi, min - 1, max + 1));
                }
                if (start !== stop) {
                    moved = true;
                }
            },
            onEnd = function (e) {
                var time = new Date() - startTime,
                    val = constrain(p + (start - stop) / hi, min - 1, max + 1),
                    speed,
                    dist,
                    tindex,
                    ttop = target.offset().top;

                if (time < 300) {
                    speed = (stop - start) / time;
                    dist = (speed * speed) / s.speedUnit;
                    if (stop - start < 0) {
                        dist = -dist;
                    }
                } else {
                    dist = stop - start;
                }

                tindex = Math.round(p - dist / hi);

                if (!dist && !moved) { // this is a "tap"
                    var idx = Math.floor((stop - ttop) / hi),
                        li = $($('.dw-li', target)[idx]),
                        hl = scrollable;
                    if (event('onValueTap', [li]) !== false) {
                        tindex = idx;
                    } else {
                        hl = true;
                    }

                    if (hl) {
                        li.addClass('dw-hl'); // Highlight
                        setTimeout(function () {
                            li.removeClass('dw-hl');
                        }, 200);
                    }
                }

                if (scrollable) {
                    calc(target, tindex, 0, true, Math.round(val));
                }

                move = false;
                target = null;

                $(document).off(MOVE_EVENT, onMove).off(END_EVENT, onEnd);
            },
            onBtnStart = function (e) {
                if (btn) {
                    btn.removeClass('dwb-a');
                }
                btn = $(this);
                $(document).on(END_EVENT, onBtnEnd);
                // Active button
                if (!btn.hasClass('dwb-d') && !btn.hasClass('dwb-nhl')) {
                    btn.addClass('dwb-a');
                }
                // +/- buttons
                if (btn.hasClass('dwwb')) {
                    if (testTouch(e)) {
                        step(e, btn.closest('.dwwl'), btn.hasClass('dwwbp') ? plus : minus);
                    }
                }
            },
            onBtnEnd = function (e) {
                if (click) {
                    clearInterval(timer);
                    click = false;
                }
                if (btn) {
                    btn.removeClass('dwb-a');
                    btn = null;
                }
                $(document).off(END_EVENT, onBtnEnd);
            },
            
            // ##### BEGIN: MODIFIED BY SAP //
            /*Improving sap.m.DateTimeInput keyboard handling:
             * 
             Adding check if [ALT] key is pressed in combination with [ARROW_UP] and [ARROW_DOWN] keys,
             because [ALT]+[ARROW_UP] and [ALT]+[ARROW_DOWN] should close the scroller.
             *
             Adding keyboard handling for PAGE_UP and PAGE_DOWN keys:
             	- on page_up press - scroller moves to the first (minimum) value of the column currently on focus.
             	- on page_down press - scroller moves to the last (maximum) value of the column currently on focus.
             */
            
            onKeyDown = function (e) {
                if (e.which == 38 && !e.altKey) {
                    step(e, $(this), plus); // up
                } else if (e.which == 40 && !e.altKey) {
                    step(e, $(this), minus); // down
                } else if (e.which == 33) {
                	step(e, $(this), pageUp); // page up
                } else if (e.which == 34) {
                	step(e, $(this), pageDown); // page down
                }
            },
            // ##### END: MODIFIED BY SAP
            
            onKeyUp = function (e) {
                if (click) {
                    clearInterval(timer);
                    click = false;
                }
            },
            onScroll = function (e) {
                if (!isReadOnly(this)) {
                    e.preventDefault();
                    e = e.originalEvent || e;
                    var delta = e.wheelDelta ? (e.wheelDelta / 120) : (e.detail ? (-e.detail / 3) : 0),
                        t = $('.dw-ul', this);

                    setGlobals(t);
                    calc(t, Math.round(pos[index] - delta), delta < 0 ? 1 : 2);
                }
            };

        // Private functions

        function step(e, w, func) {
            e.stopPropagation();
            e.preventDefault();
            if (!click && !isReadOnly(w) && !w.hasClass('dwa')) {
                click = true;
                // + Button
                var t = w.find('.dw-ul');

                setGlobals(t);
                clearInterval(timer);
                timer = setInterval(function () { func(t); }, s.delay);
                func(t);
            }
        }

        function isReadOnly(wh) {
            if ($.isArray(s.readonly)) {
                var i = $('.dwwl', dw).index(wh);
                return s.readonly[i];
            }
            return s.readonly;
        }

        function generateWheelItems(i) {
            var html = '<div class="dw-bf">',
                ww = wheels[i],
                w = ww.values ? ww : convert(ww),
                l = 1,
                labels = w.labels || [],
                values = w.values,
                keys = w.keys || values;

            $.each(values, function (j, v) {
                if (l % 20 == 0) {
                    html += '</div><div class="dw-bf">';
                }
                html += '<div role="option" aria-selected="false" class="dw-li dw-v" data-val="' + keys[j] + '"' + (labels[j] ? ' aria-label="' + labels[j] + '"' : '') + ' style="height:' + hi + 'px;line-height:' + hi + 'px;"><div class="dw-i">' + v + '</div></div>';
                l++;
            });

            html += '</div>';
            return html;
        }

        function setGlobals(t) {
            min = $('.dw-li', t).index($('.dw-v', t).eq(0));
            max = $('.dw-li', t).index($('.dw-v', t).eq(-1));
            index = $('.dw-ul', dw).index(t);
        }

        function formatHeader(v) {
            var t = s.headerText;
            return t ? (typeof t === 'function' ? t.call(e, v) : t.replace(/\{value\}/i, v)) : '';
        }

        function read() {
            that.temp = that.values ? that.values.slice(0) : s.parseValue(elm.val() || '', that);
            setVal();
        }

        function getCurrentPosition(t) {
            var style = window.getComputedStyle ? getComputedStyle(t[0]) : t[0].style,
                matrix,
                px;

            if (has3d) {
                $.each(['t', 'webkitT', 'MozT', 'OT', 'msT'], function (i, v) {
                    if (style[v + 'ransform'] !== undefined) {
                        matrix = style[v + 'ransform'];
                        return false;
                    }
                });
                matrix = matrix.split(')')[0].split(', ');
                px = matrix[13] || matrix[5];
            } else {
                px = style.top.replace('px', '');
            }

            return Math.round(m - (px / hi));
        }

        function ready(t, i) {
            clearTimeout(iv[i]);
            delete iv[i];
            t.closest('.dwwl').removeClass('dwa');
        }

        function scroll(t, index, val, time, active) {
            var px = (m - val) * hi,
                style = t[0].style,
                i;

            if (px == pixels[index] && iv[index]) {
                return;
            }

            if (time && px != pixels[index]) {
                // Trigger animation start event
                event('onAnimStart', [dw, index, time]);
            }

            pixels[index] = px;

            style[pr + 'Transition'] = 'all ' + (time ? time.toFixed(3) : 0) + 's ease-out';

            if (has3d) {
                style[pr + 'Transform'] = 'translate3d(0,' + px + 'px,0)';
            } else {
                style.top = px + 'px';
            }

            if (iv[index]) {
                ready(t, index);
            }

            if (time && active) {
                t.closest('.dwwl').addClass('dwa');
                iv[index] = setTimeout(function () {
                    ready(t, index);
                }, time * 1000);
            }

            pos[index] = val;
        }

        function getValid(val, t, dir) {
            var cell = $('.dw-li[data-val="' + val + '"]', t),
                cells = $('.dw-li', t),
                v = cells.index(cell),
                l = cells.length;

            // Scroll to a valid cell
            if (!cell.hasClass('dw-v')) {
                var cell1 = cell,
                    cell2 = cell,
                    dist1 = 0,
                    dist2 = 0;

                while (v - dist1 >= 0 && !cell1.hasClass('dw-v')) {
                    dist1++;
                    cell1 = cells.eq(v - dist1);
                }

                while (v + dist2 < l && !cell2.hasClass('dw-v')) {
                    dist2++;
                    cell2 = cells.eq(v + dist2);
                }

                // If we have direction (+/- or mouse wheel), the distance does not count
                if (((dist2 < dist1 && dist2 && dir !== 2) || !dist1 || (v - dist1 < 0) || dir == 1) && cell2.hasClass('dw-v')) {
                    cell = cell2;
                    v = v + dist2;
                } else {
                    cell = cell1;
                    v = v - dist1;
                }
            }

            return {
                cell: cell,
                v: v,
                val: cell.attr('data-val')
            };
        }

        function scrollToPos(time, index, manual, dir, active) {
            // Call validation event
            if (event('validate', [dw, index, time, dir]) !== false) {
                // Set scrollers to position
                $('.dw-ul', dw).each(function (i) {
                    var t = $(this),
                        sc = i == index || index === undefined,
                        res = getValid(that.temp[i], t, dir),
                        cell = res.cell;

                    if (!(cell.hasClass('dw-sel')) || sc) {
                        // Set valid value
                        that.temp[i] = res.val;

                        if (!s.multiple) {
                            $('.dw-sel', t).removeAttr('aria-selected');
                            cell.attr('aria-selected', 'true');
                        }

                        // Add selected class to cell
                        $('.dw-sel', t).removeClass('dw-sel');
                        cell.addClass('dw-sel');

                        // Scroll to position
                        scroll(t, i, res.v, sc ? time : 0.1, sc ? active : false);
                    }
                });

                // Reformat value if validation changed something
                v = s.formatResult(that.temp);
                if (that.live) {
                    setVal(manual, manual, 0, true);
                }

                $('.dwv', dw).html(formatHeader(v));

                if (manual) {
                    event('onChange', [v]);
                }
            }

        }

        function event(name, args) {
            var ret;
            args.push(that);
            $.each([theme, pres, settings], function (i, v) {
                if (v && v[name]) { // Call preset event
                    ret = v[name].apply(e, args);
                }
            });
            return ret;
        }

        function calc(t, val, dir, anim, orig) {
            val = constrain(val, min, max);

            var cell = $('.dw-li', t).eq(val),
                o = orig === undefined ? val : orig,
                active = orig !== undefined,
                idx = index,
                time = anim ? (val == o ? 0.1 : Math.abs((val - o) * s.timeUnit)) : 0;

            // Set selected scroller value
            that.temp[idx] = cell.attr('data-val');

            scroll(t, idx, val, time, active);

            setTimeout(function () {
                // Validate
                scrollToPos(time, idx, true, dir, active);
            }, 10);
        }

        function plus(t) {
            var val = pos[index] + 1;
            calc(t, val > max ? min : val, 1, true);
        }

        function minus(t) {
            var val = pos[index] - 1;
            calc(t, val < min ? max : val, 2, true);
        }
        
        // ##### BEGIN: MODIFIED BY SAP //
        // Adding functions pageUp and pageDown, 
        // called when [PAGE_UP] AND [PAGE_DOWN] keys are pressed
        function pageUp(t){
        	calc(t, min, 2, true);
        }
        
        function pageDown(t){
        	calc(t, max, 2, true);
        }
        // ##### END: MODIFIED BY SAP
        
        function setVal(fill, change, time, noscroll, temp, manual) {
            if (visible && !noscroll) {
                scrollToPos(time, undefined, manual);
            }

            v = s.formatResult(that.temp);

            if (!temp) {
                that.values = that.temp.slice(0);
                that.val = v;
            }

            if (fill) {
                if (input) {
                    elm.val(v);
                    if (change) {
                        preventChange = true;
                        elm.change();
                    }
                }

                event('onValueFill', [v, change]);
            }
        }

        function attachPosition(ev, checkLock) {
            var debounce;
            wndw.on(ev, function (e) {
                clearTimeout(debounce);
                debounce = setTimeout(function () {
                    if ((lock && checkLock) || !checkLock) {
                        that.position(!checkLock);
                    }
                }, 200);
            });
        }

        // Public functions

        /**
        * Positions the scroller on the screen.
        */
        that.position = function (check) {

            var nw = dw.width(), // To get the width without scrollbar
                nh = wndw[0].innerHeight || wndw.innerHeight();

            if (!(ww === nw && wh === nh && check) && !preventPos && (event('onPosition', [dw, nw, nh]) !== false) && modal) {
                var w,
                    l,
                    t,
                    aw, // anchor width
                    ah, // anchor height
                    ap, // anchor position
                    at, // anchor top
                    al, // anchor left
                    arr, // arrow
                    arrw, // arrow width
                    arrl, // arrow left
                    dh,
                    scroll,
                    totalw = 0,
                    minw = 0,
                    sl = wndw.scrollLeft(),
                    st = wndw.scrollTop(),
                    wr = $('.dwwr', dw),
                    d = $('.dw', dw),
                    css = {},
                    anchor = s.anchor === undefined ? elm : s.anchor;

                if (/modal|bubble/.test(s.display)) {
                    $('.dwc', dw).each(function () {
                        w = $(this).outerWidth(true);
                        totalw += w;
                        minw = (w > minw) ? w : minw;
                    });
                    w = totalw > nw ? minw : totalw;
                    wr.width(w).css('white-space', totalw > nw ? '' : 'nowrap');
                }

                mw = d.outerWidth();
                mh = d.outerHeight(true);
                lock = mh <= nh && mw <= nw;

                that.scrollLock = lock;

                if (s.display == 'modal') {
                    l = (nw - mw) / 2;
                    t = st + (nh - mh) / 2;
                } else if (s.display == 'bubble') {
                    scroll = true;
                    arr = $('.dw-arrw-i', dw);
                    ap = anchor.offset();
                    at = Math.abs($(s.context).offset().top - ap.top);
                    al = Math.abs($(s.context).offset().left - ap.left);

                    // horizontal positioning
                    aw = anchor.outerWidth();
                    ah = anchor.outerHeight();
                    l = constrain(al - (d.outerWidth(true) - aw) / 2 - sl, 3, nw - mw - 3);

                    // vertical positioning
                    t = at - mh; // above the input
                    if ((t < st) || (at > st + nh)) { // if doesn't fit above or the input is out of the screen
                        d.removeClass('dw-bubble-top').addClass('dw-bubble-bottom');
                        t = at + ah; // below the input
                    } else {
                        d.removeClass('dw-bubble-bottom').addClass('dw-bubble-top');
                    }

                    // Calculate Arrow position
                    arrw = arr.outerWidth();
                    arrl = constrain(al + aw / 2 - (l + (mw - arrw) / 2) - sl, 0, arrw);

                    // Limit Arrow position
                    $('.dw-arr', dw).css({ left: arrl });
                } else {
                    if (s.display == 'top') {
                        t = st;
                    } else if (s.display == 'bottom') {
                        t = st + nh - mh;
                    }
                }

                css.top = t < 0 ? 0 : t;
                css.left = l;
                d.css(css);

                // If top + modal height > doc height, increase doc height
                persp.height(0);
                dh = Math.max(t + mh, s.context == 'body' ? $(document).height() : doc.scrollHeight);
                persp.css({ height: dh, left: sl });

                // Scroll needed
                if (scroll && ((t + mh > st + nh) || (at > st + nh))) {
                    preventPos = true;
                    setTimeout(function () { preventPos = false; }, 300);
                    wndw.scrollTop(Math.min(t + mh - nh, dh - nh));
                }
            }

            ww = nw;
            wh = nh;
        };

        /**
        * Enables the scroller and the associated input.
        */
        that.enable = function () {
            s.disabled = false;
            if (input) {
                elm.prop('disabled', false);
            }
        };

        /**
        * Disables the scroller and the associated input.
        */
        that.disable = function () {
            s.disabled = true;
            if (input) {
                elm.prop('disabled', true);
            }
        };

        /**
        * Gets the selected wheel values, formats it, and set the value of the scroller instance.
        * If input parameter is true, populates the associated input element.
        * @param {Array} values Wheel values.
        * @param {Boolean} [fill=false] Also set the value of the associated input element.
        * @param {Number} [time=0] Animation time
        * @param {Boolean} [temp=false] If true, then only set the temporary value.(only scroll there but not set the value)
        */
        that.setValue = function (values, fill, time, temp, change) {
            that.temp = $.isArray(values) ? values.slice(0) : s.parseValue.call(e, values + '', that);
            setVal(fill, change === undefined ? fill : change, time, false, temp, fill);
        };

        /**
        * Return the selected wheel values.
        */
        that.getValue = function () {
            return that.values;
        };

        /**
        * Return selected values, if in multiselect mode.
        */
        that.getValues = function () {
            var ret = [],
                i;

            for (i in that._selectedValues) {
                ret.push(that._selectedValues[i]);
            }
            return ret;
        };

        /**
        * Changes the values of a wheel, and scrolls to the correct position
        * @param {Array} idx Indexes of the wheels to change.
        * @param {Number} [time=0] Animation time when scrolling to the selected value on the new wheel.
        * @param {Boolean} [manual=false] Indicates that the change was triggered by the user or from code.
        */
        that.changeWheel = function (idx, time, manual) {
            if (dw) {
                var i = 0,
                    nr = idx.length;

                $.each(s.wheels, function (j, wg) {
                    $.each(wg, function (k, w) {
                        if ($.inArray(i, idx) > -1) {
                            wheels[i] = w;
                            $('.dw-ul', dw).eq(i).html(generateWheelItems(i));
                            nr--;
                            if (!nr) {
                                that.position();
                                scrollToPos(time, undefined, manual);
                                return false;
                            }
                        }
                        i++;
                    });
                    if (!nr) {
                        return false;
                    }
                });
            }
        };

        /**
        * Return true if the scroller is currently visible.
        */
        that.isVisible = function () {
            return visible;
        };

        /**
        * Attach tap event to the given element.
        */
        that.tap = function (el, handler) {
            var startX,
                startY;

            if (s.tap) {
                el.on('touchstart.dw mousedown.dw', function (e) {
                    e.preventDefault();
                    startX = getCoord(e, 'X');
                    startY = getCoord(e, 'Y');
                }).on('touchend.dw', function (e) {
                    // If movement is less than 20px, fire the click event handler
                    if (Math.abs(getCoord(e, 'X') - startX) < 20 && Math.abs(getCoord(e, 'Y') - startY) < 20) {
                        handler.call(this, e);
                    }
                    setTap();
                });
            }

            el.on('click.dw', function (e) {
                if (!tap) {
                    // If handler was not called on touchend, call it on click;
                    handler.call(this, e);
                }
                e.preventDefault();
            });

        };

        /**
        * Shows the scroller instance.
        * @param {Boolean} prevAnim - Prevent animation if true
        */
        that.show = function (prevAnim) {
            // Create wheels
            var lbl,
                l = 0,
                mAnim = '';

            if (s.disabled || visible) {
                return;
            }

            // SAP modification: save active element with API calls too
            activeElm = elm;

            if (s.display == 'top') {
                anim = 'slidedown';
            }

            if (s.display == 'bottom') {
                anim = 'slideup';
            }

            // Parse value from input
            read();

            event('onBeforeShow', []);

            if (anim && !prevAnim) {
                mAnim = 'dw-' + anim + ' dw-in';
            }

            // Create wheels containers
            var html = '<div role="dialog" class="' + s.theme + ' dw-' + s.display + (prefix ? ' dw' + prefix.replace(/\-$/, '') : '') + (hasButtons ? '' : ' dw-nobtn') + '"><div class="dw-persp">' + (!modal ? '<div class="dw dwbg dwi">' : '<div class="dwo"></div><div class="dw dwbg ' + mAnim + '"><div class="dw-arrw"><div class="dw-arrw-i"><div class="dw-arr"></div></div></div>') + '<div class="dwwr"><div aria-live="assertive" class="dwv' + (s.headerText ? '' : ' dw-hidden') + '"></div><div class="dwcc">',
                isMinw = $.isArray(s.minWidth),
                isMaxw = $.isArray(s.maxWidth),
                isFixw = $.isArray(s.fixedWidth);

            $.each(s.wheels, function (i, wg) { // Wheel groups
                html += '<div class="dwc' + (s.mode != 'scroller' ? ' dwpm' : ' dwsc') + (s.showLabel ? '' : ' dwhl') + '"><div class="dwwc dwrc"><table cellpadding="0" cellspacing="0"><tr>';
                $.each(wg, function (j, w) { // Wheels
                    wheels[l] = w;
                    lbl = w.label !== undefined ? w.label : j;
                    html += '<td><div class="dwwl dwrc dwwl' + l + '">' + (s.mode != 'scroller' ? '<a href="#" tabindex="-1" class="dwb-e dwwb dwwbp" style="height:' + hi + 'px;line-height:' + hi + 'px;"><span>+</span></a><a href="#" tabindex="-1" class="dwb-e dwwb dwwbm" style="height:' + hi + 'px;line-height:' + hi + 'px;"><span>&ndash;</span></a>' : '') + '<div class="dwl">' + lbl + '</div><div tabindex="0" aria-live="off" aria-label="' + lbl + '" role="listbox" class="dwww"><div class="dww" style="height:' + (s.rows * hi) + 'px;' + (s.fixedWidth ? ('width:' + (isFixw ? s.fixedWidth[l] : s.fixedWidth) + 'px;') : (s.minWidth ? ('min-width:' + (isMinw ? s.minWidth[l] : s.minWidth) + 'px;') : 'min-width:' + s.width + 'px;') + (s.maxWidth ? ('max-width:' + (isMaxw ? s.maxWidth[l] : s.maxWidth) + 'px;') : '')) + '"><div class="dw-ul">';
                    // Create wheel values
                    html += generateWheelItems(l);
                    html += '</div><div class="dwwol"></div></div><div class="dwwo"></div></div><div class="dwwol"></div></div></td>';
                    l++;
                });


                html += '</tr></table></div></div>';
            });

            html += '</div>';

            if (modal && hasButtons) {
                html += '<div class="dwbc">';
                $.each(buttons, function (i, b) {
                    b = (typeof b === 'string') ? that.buttons[b] : b;
                    html += '<span' + (s.btnWidth ? ' style="width:' + (100 / buttons.length) + '%"' : '') + ' class="dwbw ' + b.css + '"><a href="#" class="dwb dwb' + i + ' dwb-e" role="button">' + b.text + '</a></span>';
                });
                html += '</div>';
            }
            html += '</div></div></div></div>';

            dw = $(html);
            persp = $('.dw-persp', dw);
            overlay = $('.dwo', dw);

            visible = true;

            scrollToPos();

            event('onMarkupReady', [dw]);

            // Show
            if (modal) {

                dw.appendTo(s.context);
                if (anim && !prevAnim) {
                    dw.addClass('dw-trans');
                    // Remove animation class
                    setTimeout(function () {
                        dw.removeClass('dw-trans').find('.dw').removeClass(mAnim);
                    }, 350);
                }
            } else if (elm.is('div')) {
                elm.html(dw);
            } else {
                dw.insertAfter(elm);
            }

            event('onMarkupInserted', [dw]);

            if (modal) {
                // Enter / ESC
                $(window).on('keydown.dw', function (e) {
                    if (e.keyCode == 13) {
                        that.select();
                    } else if (e.keyCode == 27) {
                        that.cancel();
                    }
                });

                // Prevent scroll if not specified otherwise
                if (s.scrollLock) {
                    dw.on('touchmove', function (e) {
                        if (lock) {
                            e.preventDefault();
                        }
                    });
                }

                // Disable inputs to prevent bleed through (Android bug) and set autocomplete to off (for Firefox)
                $('input,select,button', doc).each(function () {
                    if (!this.disabled) {
                        if ($(this).attr('autocomplete')) {
                            $(this).data('autocomplete', $(this).attr('autocomplete'));
                        }
                        $(this).addClass('dwtd').prop('disabled', true).attr('autocomplete', 'off');
                    }
                });

                attachPosition('scroll.dw', true);
            }

            // Set position
            that.position();
            attachPosition('orientationchange.dw resize.dw', false);

            // Events
            dw.on('DOMMouseScroll mousewheel', '.dwwl', onScroll)
                .on('keydown', '.dwwl', onKeyDown)
                .on('keyup', '.dwwl', onKeyUp)
                .on('selectstart mousedown', prevdef) // Prevents blue highlight on Android and text selection in IE
                .on('click', '.dwb-e', prevdef)
                .on('touchend', function () { if (s.tap) { setTap(); } })
                .on('keydown', '.dwb-e', function (e) {
                    if (e.keyCode == 32) { // Space
                        e.preventDefault();
                        e.stopPropagation();
                        $(this).click();
                    }
                });

            setTimeout(function () {
                // Init buttons
                $.each(buttons, function (i, b) {
                    that.tap($('.dwb' + i, dw), function (e) {
                        b = (typeof b === 'string') ? that.buttons[b] : b;
                        b.handler.call(this, e, that);
                    });
                });

                if (s.closeOnOverlay) {
                    that.tap(overlay, function () {
                        that.cancel();
                    });
                }

                dw.on(START_EVENT, '.dwwl', onStart).on(START_EVENT, '.dwb-e', onBtnStart);

            }, 300);

            event('onShow', [dw, v]);
        };

        /**
        * Hides the scroller instance.
        */
        that.hide = function (prevAnim, btn, force) {
            // If onClose handler returns false, prevent hide
            if (!visible || (!force && event('onClose', [v, btn]) === false)) {
                return;
            }

            // Re-enable temporary disabled fields
            $('.dwtd', doc).each(function () {
                $(this).prop('disabled', false).removeClass('dwtd');
                if ($(this).data('autocomplete')) {
                    $(this).attr('autocomplete', $(this).data('autocomplete'));
                } else {
                    $(this).removeAttr('autocomplete');
                }
            });

            // Hide wheels and overlay
            if (dw) {
                var doAnim = modal && anim && !prevAnim;
                if (doAnim) {
                    dw.addClass('dw-trans').find('.dw').addClass('dw-' + anim + ' dw-out');
                }
                if (prevAnim) {
                    dw.remove();
                } else {
                    setTimeout(function () {
                        dw.remove();
                        if (activeElm) {
                            preventShow = true;
                            activeElm.focus();
                        }
                    }, doAnim ? 350 : 1);
                }

                // Stop positioning on window resize
                wndw.off('.dw');
            }

            pixels = {};
            visible = false;
        };

        /**
        * Set button handler.
        */
        that.select = function () {
            if (that.hide(false, 'set') !== false) {
                setVal(true, true, 0, true);
                event('onSelect', [that.val]);
            }
        };

        /**
        * Show mobiscroll on focus and click event of the parameter.
        * @param {jQuery} elm - Events will be attached to this element.
        * @param {Function} [beforeShow=undefined] - Optional function to execute before showing mobiscroll.
        */
        that.attachShow = function (elm, beforeShow) {
            elmList.push(elm);
            if (s.display !== 'inline') {
                elm.on((s.showOnFocus ? 'focus.dw' : '') + (s.showOnTap ? ' click.dw' : ''), function (ev) {
                    if ((ev.type !== 'focus' || (ev.type === 'focus' && !preventShow)) && !tap) {
                        if (beforeShow) {
                            beforeShow();
                        }
                        activeElm = elm;
                        that.show();
                    }
                    setTimeout(function () {
                        preventShow = false;
                    }, 300); // With jQuery < 1.9 focus is fired twice in IE
                });
            }
        };

        /**
        * Cancel and hide the scroller instance.
        */
        that.cancel = function () {
            if (that.hide(false, 'cancel') !== false) {
                event('onCancel', [that.val]);
            }
        };

        /**
        * Scroller initialization.
        */
        that.init = function (ss) {
            // Get theme defaults
            theme = ms.themes[ss.theme || s.theme];

            // Get language defaults
            lang = ms.i18n[ss.lang || s.lang];

            extend(settings, ss); // Update original user settings

            event('onThemeLoad', [lang, settings]);

            extend(s, theme, lang, settings);

            // Add default buttons
            s.buttons = s.buttons || ['set', 'cancel'];

            // Hide header text in inline mode by default
            s.headerText = s.headerText === undefined ? (s.display !== 'inline' ? '{value}' : false) : s.headerText;

            that.settings = s;

            // Unbind all events (if re-init)
            elm.off('.dw');

            var preset = ms.presets[s.preset];

            if (preset) {
                pres = preset.call(e, that);
                extend(s, pres, settings); // Load preset settings
            }

            // Set private members
            m = Math.floor(s.rows / 2);
            hi = s.height;
            anim = s.animate;
            modal = s.display !== 'inline';
            buttons = s.buttons;
            wndw = $(s.context == 'body' ? window : s.context);
            doc = $(s.context)[0];

            if (!s.setText) {
                buttons.splice($.inArray('set', buttons), 1);
            }
            if (!s.cancelText) {
                buttons.splice($.inArray('cancel', buttons), 1);
            }
            if (s.button3) {
                buttons.splice($.inArray('set', buttons) + 1, 0, { text: s.button3Text, handler: s.button3 });
            }

            that.context = wndw;
            that.live = !modal || ($.inArray('set', buttons) == -1);
            that.buttons.set = { text: s.setText, css: 'dwb-s', handler: that.select };
            that.buttons.cancel = { text: (that.live) ? s.closeText : s.cancelText, css: 'dwb-c', handler: that.cancel };
            that.buttons.clear = { text: s.clearText, css: 'dwb-cl', handler: function () {
                that.trigger('onClear', [dw]);
                elm.val('');
                if (!that.live) {
                    that.hide();
                }
            }};

            hasButtons = buttons.length > 0;

            if (visible) {
                that.hide(true, false, true);
            }

            if (modal) {
                read();
                if (input) {
                    // Set element readonly, save original state
                    if (readOnly === undefined) {
                        readOnly = e.readOnly;
                    }
                    e.readOnly = true;
                }
                that.attachShow(elm);
            } else {
                that.show();
            }

            if (input) {
                elm.on('change.dw', function () {
                    if (!preventChange) {
                        that.setValue(elm.val(), false, 0.2);
                    }
                    preventChange = false;
                });
            }
        };

        /**
        * Sets one ore more options.
        */
        that.option = function (opt, value) {
            var obj = {};
            if (typeof opt === 'object') {
                obj = opt;
            } else {
                obj[opt] = value;
            }
            that.init(obj);
        };

        /**
        * Destroys the mobiscroll instance.
        */
        that.destroy = function () {
            that.hide(true, false, true);
            // Remove all events from elements
            $.each(elmList, function (i, v) {
                v.off('.dw');
            });
            // Remove events from window
            $(window).off('.dwa');
            // Reset original readonly state
            if (input) {
                e.readOnly = readOnly;
            }
            // Delete scroller instance
            delete instances[e.id];
            event('onDestroy', []);
        };

        /**
        * Returns the mobiscroll instance.
        */
        that.getInst = function () {
            return that;
        };

        /**
        * Returns the closest valid cell.
        */
        that.getValidCell = getValid;

        /**
        * Triggers a mobiscroll event.
        */
        that.trigger = event;

        instances[e.id] = that;

        that.values = null;
        that.val = null;
        that.temp = null;
        that.buttons = {};
        that._selectedValues = {};

        that.init(settings);
    }

    function setTap() {
        tap = true;
        setTimeout(function () {
            tap = false;
        }, 300);
    }

    function constrain(val, min, max) {
        return Math.max(min, Math.min(val, max));
    }

    function convert(w) {
        var ret = {
            values: [],
            keys: []
        };
        $.each(w, function (k, v) {
            ret.keys.push(k);
            ret.values.push(v);
        });
        return ret;
    }

    var activeElm,
        move,
        tap,
        preventShow,
        ms = $.mobiscroll,
        instances = ms.instances,
        util = ms.util,
        prefix = util.prefix,
        pr = util.jsPrefix,
        has3d = util.has3d,
        getCoord = util.getCoord,
        testTouch = util.testTouch,
        empty = function () {},
        prevdef = function (e) { e.preventDefault(); },
        extend = $.extend,
        START_EVENT = 'touchstart mousedown',
        MOVE_EVENT = 'touchmove mousemove',
        END_EVENT = 'touchend mouseup',
        defaults = extend(ms.defaults, {
            // Options
            width: 70,
            height: 40,
            rows: 3,
            delay: 300,
            disabled: false,
            readonly: false,
            closeOnOverlay: true,
            showOnFocus: true,
            showOnTap: true,
            showLabel: true,
            wheels: [],
            theme: '',
            display: 'modal',
            mode: 'scroller',
            preset: '',
            lang: 'en-US',
            context: 'body',
            scrollLock: true,
            tap: true,
            btnWidth: true,
            speedUnit: 0.0012,
            timeUnit: 0.1,
            formatResult: function (d) {
                return d.join(' ');
            },
            parseValue: function (value, inst) {
                var val = value.split(' '),
                    ret = [],
                    i = 0,
                    keys;

                $.each(inst.settings.wheels, function (j, wg) {
                    $.each(wg, function (k, w) {
                        w = w.values ? w : convert(w);
                        keys = w.keys || w.values;
                        if ($.inArray(val[i], keys) !== -1) {
                            ret.push(val[i]);
                        } else {
                            ret.push(keys[0]);
                        }
                        i++;
                    });
                });
                return ret;
            }
        });

    // English language module
    ms.i18n.en = ms.i18n['en-US'] = {
        setText: 'Set',
        selectedText: 'Selected',
        closeText: 'Close',
        cancelText: 'Cancel',
        clearText: 'Clear'
    };

    // Prevent re-show on window focus
    $(window).on('focus', function () {
        if (activeElm) {
            preventShow = true;
        }
    });

    $(document).on('mouseover mouseup mousedown click', function (e) { // Prevent standard behaviour on body click
        if (tap) {
            e.stopPropagation();
            e.preventDefault();
            return false;
        }
    });

})(jQuery);