(function($) {
    var abs = Math.abs, max = Math.max, min = Math.min, round = Math.round;
    function div() {
        return $('<div/>')
    }
    $.imgAreaSelect = function(img, options) {
        var $img = $(img), imgLoaded, $box = div(), $area = div(), $border = div().add(div()).add(div()).add(div()), $outer = div().add(div()).add(div()).add(div()), $handles = $([]), $areaOpera, left, top, imgOfs = {left: 0, top: 0}, imgWidth, imgHeight, $parent, parOfs = {left: 0, top: 0}, zIndex = 0, position = 'absolute', startX, startY, scaleX, scaleY, resize, minWidth, minHeight, maxWidth, maxHeight, aspectRatio, shown, x1, y1, x2, y2, selection = {x1: 0, y1: 0, x2: 0, y2: 0, width: 0, height: 0}, docElem = document.documentElement, $p, d, i, o, w, h, adjusted;
        function viewX(x) {
            return x + imgOfs.left - parOfs.left
        }
        function viewY(y) {
            return y + imgOfs.top - parOfs.top
        }
        function selX(x) {
            return x - imgOfs.left + parOfs.left
        }
        function selY(y) {
            return y - imgOfs.top + parOfs.top
        }
        function evX(event) {
            return event.pageX - parOfs.left
        }
        function evY(event) {
            return event.pageY - parOfs.top
        }
        function getSelection(noScale) {
            var sx = noScale || scaleX, sy = noScale || scaleY;
            return{x1: round(selection.x1 * sx), y1: round(selection.y1 * sy), x2: round(selection.x2 * sx), y2: round(selection.y2 * sy), width: round(selection.x2 * sx) - round(selection.x1 * sx), height: round(selection.y2 * sy) - round(selection.y1 * sy)}
        }
        function setSelection(x1, y1, x2, y2, noScale) {
            var sx = noScale || scaleX, sy = noScale || scaleY;
            selection = {x1: round(x1 / sx || 0), y1: round(y1 / sy || 0), x2: round(x2 / sx || 0), y2: round(y2 / sy || 0)};
            selection.width = selection.x2 - selection.x1;
            selection.height = selection.y2 - selection.y1
        }
        function adjust() {
            if (!$img.width())
                return;
            imgOfs = {left: round($img.offset().left), top: round($img.offset().top)};
            imgWidth = $img.innerWidth();
            imgHeight = $img.innerHeight();
            imgOfs.top += ($img.outerHeight() - imgHeight) >> 1;
            imgOfs.left += ($img.outerWidth() - imgWidth) >> 1;
            minWidth = round(options.minWidth / scaleX) || 0;
            minHeight = round(options.minHeight / scaleY) || 0;
            maxWidth = round(min(options.maxWidth / scaleX || 1 << 24, imgWidth));
            maxHeight = round(min(options.maxHeight / scaleY || 1 << 24, imgHeight));
            if ($().jquery == '1.3.2' && position == 'fixed' && !docElem['getBoundingClientRect']) {
                imgOfs.top += max(document.body.scrollTop, docElem.scrollTop);
                imgOfs.left += max(document.body.scrollLeft, docElem.scrollLeft)
            }
            parOfs = /absolute|relative/.test($parent.css('position')) ? {left: round($parent.offset().left) - $parent.scrollLeft(), top: round($parent.offset().top) - $parent.scrollTop()} : position == 'fixed' ? {left: $(document).scrollLeft(), top: $(document).scrollTop()} : {left: 0, top: 0};
            left = viewX(0);
            top = viewY(0);
            if (selection.x2 > imgWidth || selection.y2 > imgHeight)
                doResize()
        }
        function update(resetKeyPress) {
            if (!shown)
                return;
            $box.css({left: viewX(selection.x1), top: viewY(selection.y1)}).add($area).width(w = selection.width).height(h = selection.height);
            $area.add($border).add($handles).css({left: 0, top: 0});
            $border.width(max(w - $border.outerWidth() + $border.innerWidth(), 0)).height(max(h - $border.outerHeight() + $border.innerHeight(), 0));
            $($outer[0]).css({left: left, top: top, width: selection.x1, height: imgHeight});
            $($outer[1]).css({left: left + selection.x1, top: top, width: w, height: selection.y1});
            $($outer[2]).css({left: left + selection.x2, top: top, width: imgWidth - selection.x2, height: imgHeight});
            $($outer[3]).css({left: left + selection.x1, top: top + selection.y2, width: w, height: imgHeight - selection.y2});
            w -= $handles.outerWidth();
            h -= $handles.outerHeight();
            switch ($handles.length) {
                case 8:
                    $($handles[4]).css({left: w >> 1});
                    $($handles[5]).css({left: w, top: h >> 1});
                    $($handles[6]).css({left: w >> 1, top: h});
                    $($handles[7]).css({top: h >> 1});
                case 4:
                    $handles.slice(1, 3).css({left: w});
                    $handles.slice(2, 4).css({top: h})
            }
            if (resetKeyPress !== false) {
                if ($.imgAreaSelect.keyPress != docKeyPress)
                    $(document).unbind($.imgAreaSelect.keyPress, $.imgAreaSelect.onKeyPress);
                if (options.keys)
                    $(document)[$.imgAreaSelect.keyPress]($.imgAreaSelect.onKeyPress = docKeyPress)
            }
            if ($.browser.msie && $border.outerWidth() - $border.innerWidth() == 2) {
                $border.css('margin', 0);
                setTimeout(function() {
                    $border.css('margin', 'auto')
                }, 0)
            }
        }
        function doUpdate(resetKeyPress) {
            adjust();
            update(resetKeyPress);
            x1 = viewX(selection.x1);
            y1 = viewY(selection.y1);
            x2 = viewX(selection.x2);
            y2 = viewY(selection.y2)
        }
        function hide($elem, fn) {
            options.fadeSpeed ? $elem.fadeOut(options.fadeSpeed, fn) : $elem.hide()
        }
        function areaMouseMove(event) {
            var x = selX(evX(event)) - selection.x1, y = selY(evY(event)) - selection.y1;
            if (!adjusted) {
                adjust();
                adjusted = true;
                $box.one('mouseout', function() {
                    adjusted = false
                })
            }
            resize = '';
            if (options.resizable) {
                if (y <= options.resizeMargin)
                    resize = 'n';
                else if (y >= selection.height - options.resizeMargin)
                    resize = 's';
                if (x <= options.resizeMargin)
                    resize += 'w';
                else if (x >= selection.width - options.resizeMargin)
                    resize += 'e'
            }
            $box.css('cursor', resize ? resize + '-resize' : options.movable ? 'move' : '');
            if ($areaOpera)
                $areaOpera.toggle()
        }
        function docMouseUp(event) {
            $('body').css('cursor', '');
            if (options.autoHide || selection.width * selection.height == 0)
                hide($box.add($outer), function() {
                    $(this).hide()
                });
            $(document).unbind('mousemove', selectingMouseMove);
            $box.mousemove(areaMouseMove);
            options.onSelectEnd(img, getSelection())
        }
        function areaMouseDown(event) {
            if (event.which != 1)
                return false;
            adjust();
            if (resize) {
                $('body').css('cursor', resize + '-resize');
                x1 = viewX(selection[/w/.test(resize) ? 'x2' : 'x1']);
                y1 = viewY(selection[/n/.test(resize) ? 'y2' : 'y1']);
                $(document).mousemove(selectingMouseMove).one('mouseup', docMouseUp);
                $box.unbind('mousemove', areaMouseMove)
            } else if (options.movable) {
                startX = left + selection.x1 - evX(event);
                startY = top + selection.y1 - evY(event);
                $box.unbind('mousemove', areaMouseMove);
                $(document).mousemove(movingMouseMove).one('mouseup', function() {
                    options.onSelectEnd(img, getSelection());
                    $(document).unbind('mousemove', movingMouseMove);
                    $box.mousemove(areaMouseMove)
                })
            } else
                $img.mousedown(event);
            return false
        }
        function fixAspectRatio(xFirst) {
            if (aspectRatio)
                if (xFirst) {
                    x2 = max(left, min(left + imgWidth, x1 + abs(y2 - y1) * aspectRatio * (x2 > x1 || -1)));
                    y2 = round(max(top, min(top + imgHeight, y1 + abs(x2 - x1) / aspectRatio * (y2 > y1 || -1))));
                    x2 = round(x2)
                } else {
                    y2 = max(top, min(top + imgHeight, y1 + abs(x2 - x1) / aspectRatio * (y2 > y1 || -1)));
                    x2 = round(max(left, min(left + imgWidth, x1 + abs(y2 - y1) * aspectRatio * (x2 > x1 || -1))));
                    y2 = round(y2)
                }
        }
        function doResize() {
            x1 = min(x1, left + imgWidth);
            y1 = min(y1, top + imgHeight);
            if (abs(x2 - x1) < minWidth) {
                x2 = x1 - minWidth * (x2 < x1 || -1);
                if (x2 < left)
                    x1 = left + minWidth;
                else if (x2 > left + imgWidth)
                    x1 = left + imgWidth - minWidth
            }
            if (abs(y2 - y1) < minHeight) {
                y2 = y1 - minHeight * (y2 < y1 || -1);
                if (y2 < top)
                    y1 = top + minHeight;
                else if (y2 > top + imgHeight)
                    y1 = top + imgHeight - minHeight
            }
            x2 = max(left, min(x2, left + imgWidth));
            y2 = max(top, min(y2, top + imgHeight));
            fixAspectRatio(abs(x2 - x1) < abs(y2 - y1) * aspectRatio);
            if (abs(x2 - x1) > maxWidth) {
                x2 = x1 - maxWidth * (x2 < x1 || -1);
                fixAspectRatio()
            }
            if (abs(y2 - y1) > maxHeight) {
                y2 = y1 - maxHeight * (y2 < y1 || -1);
                fixAspectRatio(true)
            }
            //selection = {x1: selX(min(x1, x2)), x2: selX(max(x1, x2)), y1: selY(min(y1, y2)), y2: selY(max(y1, y2)), width: abs(x2 - x1), height: abs(y2 - y1)};
            selection = {x1: selX(min(x1, x2)), x2: selX(max(x1, x2)), y1: 0, y2: imgHeight, width: abs(x2 - x1), height: imgHeight};
            update();
            options.onSelectChange(img, getSelection())
        }
        function selectingMouseMove(event) {
            x2 = /w|e|^$/.test(resize) || aspectRatio ? evX(event) : viewX(selection.x2);
            y2 = /n|s|^$/.test(resize) || aspectRatio ? evY(event) : viewY(selection.y2);
            doResize();
            return false
        }
        function doMove(newX1, newY1) {
            x2 = (x1 = newX1) + selection.width;
            y2 = (y1 = newY1) + selection.height;
            $.extend(selection, {x1: selX(x1), y1: selY(y1), x2: selX(x2), y2: selY(y2)});
            update();
            options.onSelectChange(img, getSelection())
        }
        function movingMouseMove(event) {
            x1 = max(left, min(startX + evX(event), left + imgWidth - selection.width));
            y1 = max(top, min(startY + evY(event), top + imgHeight - selection.height));
            doMove(x1, y1);
            event.preventDefault();
            return false
        }
        function startSelection() {
            $(document).unbind('mousemove', startSelection);
            adjust();
            x2 = x1;
            y2 = y1;
            doResize();
            resize = '';
            if (!$outer.is(':visible'))
                $box.add($outer).hide().fadeIn(options.fadeSpeed || 0);
            shown = true;
            $(document).unbind('mouseup', cancelSelection).mousemove(selectingMouseMove).one('mouseup', docMouseUp);
            $box.unbind('mousemove', areaMouseMove);
            options.onSelectStart(img, getSelection())
        }
        function cancelSelection() {
            $(document).unbind('mousemove', startSelection).unbind('mouseup', cancelSelection);
            hide($box.add($outer));
            setSelection(selX(x1), selY(y1), selX(x1), selY(y1));
            if (!this instanceof $.imgAreaSelect) {
                options.onSelectChange(img, getSelection());
                options.onSelectEnd(img, getSelection())
            }
        }
        function imgMouseDown(event) {
            if (event.which != 1 || $outer.is(':animated'))
                return false;
            adjust();
            startX = x1 = evX(event);
            startY = y1 = evY(event);
            $(document).mousemove(startSelection).mouseup(cancelSelection);
            return false
        }
        function windowResize() {
            doUpdate(false)
        }
        function imgLoad() {
            imgLoaded = true;
            setOptions(options = $.extend({classPrefix: 'imgareaselect', movable: true, parent: 'body', resizable: true, resizeMargin: 10, onInit: function() {
                }, onSelectStart: function() {
                }, onSelectChange: function() {
                }, onSelectEnd: function() {
                }}, options));
            $box.add($outer).css({visibility: ''});
            if (options.show) {
                shown = true;
                adjust();
                update();
                $box.add($outer).hide().fadeIn(options.fadeSpeed || 0)
            }
            setTimeout(function() {
                options.onInit(img, getSelection())
            }, 0)
        }
        var docKeyPress = function(event) {
            var k = options.keys, d, t, key = event.keyCode;
            d = !isNaN(k.alt) && (event.altKey || event.originalEvent.altKey) ? k.alt : !isNaN(k.ctrl) && event.ctrlKey ? k.ctrl : !isNaN(k.shift) && event.shiftKey ? k.shift : !isNaN(k.arrows) ? k.arrows : 10;
            if (k.arrows == 'resize' || (k.shift == 'resize' && event.shiftKey) || (k.ctrl == 'resize' && event.ctrlKey) || (k.alt == 'resize' && (event.altKey || event.originalEvent.altKey))) {
                switch (key) {
                    case 37:
                        d = -d;
                    case 39:
                        t = max(x1, x2);
                        x1 = min(x1, x2);
                        x2 = max(t + d, x1);
                        fixAspectRatio();
                        break;
                    case 38:
                        d = -d;
                    case 40:
                        t = max(y1, y2);
                        y1 = min(y1, y2);
                        y2 = max(t + d, y1);
                        fixAspectRatio(true);
                        break;
                    default:
                        return
                }
                doResize()
            } else {
                x1 = min(x1, x2);
                y1 = min(y1, y2);
                switch (key) {
                    case 37:
                        doMove(max(x1 - d, left), y1);
                        break;
                    case 38:
                        doMove(x1, max(y1 - d, top));
                        break;
                    case 39:
                        doMove(x1 + min(d, imgWidth - selX(x2)), y1);
                        break;
                    case 40:
                        doMove(x1, y1 + min(d, imgHeight - selY(y2)));
                        break;
                    default:
                        return
                    }
            }
            return false
        };
        function styleOptions($elem, props) {
            for (option in props)
                if (options[option] !== undefined)
                    $elem.css(props[option], options[option])
        }
        function setOptions(newOptions) {
            if (newOptions.parent)
                ($parent = $(newOptions.parent)).append($box.add($outer));
            $.extend(options, newOptions);
            adjust();
            if (newOptions.handles != null) {
                $handles.remove();
                $handles = $([]);
                i = newOptions.handles ? newOptions.handles == 'corners' ? 4 : 8 : 0;
                while (i--)
                    $handles = $handles.add(div());
                $handles.addClass(options.classPrefix + '-handle').css({position: 'absolute', fontSize: 0, zIndex: zIndex + 1 || 1});
                if (!parseInt($handles.css('width')) >= 0)
                    $handles.width(5).height(5);
                if (o = options.borderWidth)
                    $handles.css({borderWidth: o, borderStyle: 'solid'});
                styleOptions($handles, {borderColor1: 'border-color', borderColor2: 'background-color', borderOpacity: 'opacity'})
            }
            scaleX = options.imageWidth / imgWidth || 1;
            scaleY = options.imageHeight / imgHeight || 1;
            if (newOptions.x1 != null) {
                setSelection(newOptions.x1, newOptions.y1, newOptions.x2, newOptions.y2);
                newOptions.show = !newOptions.hide
            }
            if (newOptions.keys)
                options.keys = $.extend({shift: 1, ctrl: 'resize'}, newOptions.keys);
            $outer.addClass(options.classPrefix + '-outer');
            $area.addClass(options.classPrefix + '-selection');
            for (i = 0; i++ < 4; )
                $($border[i - 1]).addClass(options.classPrefix + '-border' + i);
            styleOptions($area, {selectionColor: 'background-color', selectionOpacity: 'opacity'});
            styleOptions($border, {borderOpacity: 'opacity', borderWidth: 'border-width'});
            styleOptions($outer, {outerColor: 'background-color', outerOpacity: 'opacity'});
            if (o = options.borderColor1)
                $($border[0]).css({borderStyle: 'solid', borderColor: o});
            if (o = options.borderColor2)
                $($border[1]).css({borderStyle: 'dashed', borderColor: o});
            $box.append($area.add($border).add($areaOpera).add($handles));
            if ($.browser.msie) {
                if (o = $outer.css('filter').match(/opacity=(\d+)/))
                    $outer.css('opacity', o[1] / 100);
                if (o = $border.css('filter').match(/opacity=(\d+)/))
                    $border.css('opacity', o[1] / 100)
            }
            if (newOptions.hide)
                hide($box.add($outer));
            else if (newOptions.show && imgLoaded) {
                shown = true;
                $box.add($outer).fadeIn(options.fadeSpeed || 0);
                doUpdate()
            }
            aspectRatio = (d = (options.aspectRatio || '').split(/:/))[0] / d[1];
            $img.add($outer).unbind('mousedown', imgMouseDown);
            if (options.disable || options.enable === false) {
                $box.unbind('mousemove', areaMouseMove).unbind('mousedown', areaMouseDown);
                $(window).unbind('resize', windowResize)
            } else {
                if (options.enable || options.disable === false) {
                    if (options.resizable || options.movable)
                        $box.mousemove(areaMouseMove).mousedown(areaMouseDown);
                    $(window).resize(windowResize)
                }
                if (!options.persistent)
                    $img.add($outer).mousedown(imgMouseDown)
            }
            options.enable = options.disable = undefined
        }
        this.remove = function() {
            setOptions({disable: true});
            $box.add($outer).remove()
        };
        this.getOptions = function() {
            return options
        };
        this.setOptions = setOptions;
        this.getSelection = getSelection;
        this.setSelection = setSelection;
        this.cancelSelection = cancelSelection;
        this.update = doUpdate;
        $p = $img;
        while ($p.length) {
            zIndex = max(zIndex, !isNaN($p.css('z-index')) ? $p.css('z-index') : zIndex);
            if ($p.css('position') == 'fixed')
                position = 'fixed';
            $p = $p.parent(':not(body)')
        }
        zIndex = options.zIndex || zIndex;
        if ($.browser.msie)
            $img.attr('unselectable', 'on');
        $.imgAreaSelect.keyPress = $.browser.msie || $.browser.safari ? 'keydown' : 'keypress';
        if ($.browser.opera)
            $areaOpera = div().css({width: '100%', height: '100%', position: 'absolute', zIndex: zIndex + 2 || 2});
        $box.add($outer).css({visibility: 'hidden', position: position, overflow: 'hidden', zIndex: zIndex || '0'});
        $box.css({zIndex: zIndex + 2 || 2});
        $area.add($border).css({position: 'absolute', fontSize: 0});
        img.complete || img.readyState == 'complete' || !$img.is('img') ? imgLoad() : $img.one('load', imgLoad);
        if ($.browser.msie && $.browser.version >= 7)
            img.src = img.src
    };
    $.fn.imgAreaSelect = function(options) {
        options = options || {};
        this.each(function() {
            if ($(this).data('imgAreaSelect')) {
                if (options.remove) {
                    $(this).data('imgAreaSelect').remove();
                    $(this).removeData('imgAreaSelect')
                } else
                    $(this).data('imgAreaSelect').setOptions(options)
            } else if (!options.remove) {
                if (options.enable === undefined && options.disable === undefined)
                    options.enable = true;
                $(this).data('imgAreaSelect', new $.imgAreaSelect(this, options))
            }
        });
        if (options.instance)
            return $(this).data('imgAreaSelect');
        return this
    }
})(jQuery);