/*

 * imgAreaSelect jQuery plugin

 * version 0.9.1

 *

 * Copyright (c) 2008-2009 Michal Wojciechowski (odyniec.net)

 *

 * Dual licensed under the MIT (MIT-LICENSE.txt)

 * and GPL (GPL-LICENSE.txt) licenses.

 *

 * http://odyniec.net/projects/imgareaselect/

 *

 */

(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,

        imgWidth, imgHeight,

        $parent,

        parOfs,

        zIndex = 0,

        position = 'absolute',

        startX, startY,

        scaleX, scaleY,

        resizeMargin = 10,

        resize,

        aspectRatio,

        shown,

        x1, y1, x2, y2,

        selection = { x1: 0, y1: 0, x2: 0, y2: 0, width: 0, height: 0 },

        $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),

            y1: round(y1 / sy),

            x2: round(x2 / sx),

            y2: round(y2 / sy)

        };

        selection.width = (x2 = viewX(selection.x2)) - (x1 = viewX(selection.x1));

        selection.height = (y2 = viewX(selection.y2)) - (y1 = viewX(selection.y1));

    }

    function adjust() {

        if (!$img.width())

            return;

        imgOfs = { left: round($img.offset().left), top: round($img.offset().top) };

        imgWidth = $img.width();

        imgHeight = $img.height();

        if ($().jquery == '1.3.2' && $.browser.safari && position == 'fixed') {

            imgOfs.top += max(document.documentElement.scrollTop, $('body').scrollTop());

            imgOfs.left += max(document.documentElement.scrollLeft, $('body').scrollLeft());

        }

        parOfs = $.inArray($parent.css('position'), ['absolute', 'relative']) + 1 ?

            { 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);

    }

    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 / 2 });

            $($handles[5]).css({ left: w, top: h / 2 });

            $($handles[6]).css({ left: w / 2, top: h });

            $($handles[7]).css({ top: h / 2 });

        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 <= resizeMargin)

                resize = 'n';

            else if (y >= selection.height - resizeMargin)

                resize = 's';

            if (x <= resizeMargin)

                resize += 'w';

            else if (x >= selection.width - 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(); });

        options.onSelectEnd(img, getSelection());

        $(document).unbind('mousemove', selectingMouseMove);

        $box.mousemove(areaMouseMove);

    }

    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 aspectRatioXY() {

        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);

    }

    function aspectRatioYX() {

        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() {

        if (abs(x2 - x1) < options.minWidth) {

            x2 = x1 - options.minWidth * (x2 < x1 || -1);

            if (x2 < left)

                x1 = left + options.minWidth;

            else if (x2 > left + imgWidth)

                x1 = left + imgWidth - options.minWidth;

        }

        if (abs(y2 - y1) < options.minHeight) {

            y2 = y1 - options.minHeight * (y2 < y1 || -1);

            if (y2 < top)

                y1 = top + options.minHeight;

            else if (y2 > top + imgHeight)

                y1 = top + imgHeight - options.minHeight;

        }

        x2 = max(left, min(x2, left + imgWidth));

        y2 = max(top, min(y2, top + imgHeight));

        if (aspectRatio)

            if (abs(x2 - x1) / aspectRatio > abs(y2 - y1))

                aspectRatioYX();

            else

                aspectRatioXY();

        if (abs(x2 - x1) > options.maxWidth) {