/*

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* imgAreaSelect jQuery plugin

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* version 0.9.10-wp

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*

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* Copyright (c) 2008-2013 Michal Wojciechowski (odyniec.net)

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*

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

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

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*

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* https://github.com/odyniec/imgareaselect

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*

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*/

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(function($) {

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/*

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* Math functions will be used extensively, so it's convenient to make a few

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* shortcuts

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*/

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var abs = Math.abs,

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max = Math.max,

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min = Math.min,

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round = Math.round;

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/**

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* Create a new HTML div element

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*

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* @return A jQuery object representing the new element

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*/

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function div() {

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return $('<div/>');

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}

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/**

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* imgAreaSelect initialization

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*

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* @param img

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* A HTML image element to attach the plugin to

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* @param options

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* An options object

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*/

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$.imgAreaSelect = function (img, options) {

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var

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/* jQuery object representing the image */

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$img = $(img),

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/* Has the image finished loading? */

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imgLoaded,

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/* Plugin elements */

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/* Container box */

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$box = div(),

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/* Selection area */

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$area = div(),

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/* Border (four divs) */

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$border = div().add(div()).add(div()).add(div()),

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/* Outer area (four divs) */

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$outer = div().add(div()).add(div()).add(div()),

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/* Handles (empty by default, initialized in setOptions()) */

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$handles = $([]),

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/*

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* Additional element to work around a cursor problem in Opera

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* (explained later)

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*/

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$areaOpera,

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/* Image position (relative to viewport) */

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left, top,

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/* Image offset (as returned by .offset()) */

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imgOfs = { left: 0, top: 0 },

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/* Image dimensions (as returned by .width() and .height()) */

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imgWidth, imgHeight,

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/*

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* jQuery object representing the parent element that the plugin

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* elements are appended to

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*/

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$parent,

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/* Parent element offset (as returned by .offset()) */

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parOfs = { left: 0, top: 0 },

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/* Base z-index for plugin elements */

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zIndex = 0,

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/* Plugin elements position */

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position = 'absolute',

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/* X/Y coordinates of the starting point for move/resize operations */

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startX, startY,

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/* Horizontal and vertical scaling factors */

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scaleX, scaleY,

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/* Current resize mode ("nw", "se", etc.) */

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resize,

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/* Selection area constraints */

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minWidth, minHeight, maxWidth, maxHeight,

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/* Aspect ratio to maintain (floating point number) */

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aspectRatio,

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/* Are the plugin elements currently displayed? */

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shown,

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/* Current selection (relative to parent element) */

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x1, y1, x2, y2,

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/* Current selection (relative to scaled image) */

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

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/* Document element */

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docElem = document.documentElement,

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/* User agent */

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ua = navigator.userAgent,

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/* Various helper variables used throughout the code */

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$p, d, i, o, w, h, adjusted;

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/*

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* Translate selection coordinates (relative to scaled image) to viewport

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* coordinates (relative to parent element)

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*/

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/**

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* Translate selection X to viewport X

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*

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* @param x

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* Selection X

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* @return Viewport X

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*/

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function viewX(x) {

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return x + imgOfs.left - parOfs.left;

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}

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/**

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* Translate selection Y to viewport Y

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*

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* @param y

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* Selection Y

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* @return Viewport Y

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*/

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function viewY(y) {

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return y + imgOfs.top - parOfs.top;

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}

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/*

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* Translate viewport coordinates to selection coordinates

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*/

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/**

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* Translate viewport X to selection X

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*

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* @param x

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* Viewport X

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* @return Selection X

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*/

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function selX(x) {

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return x - imgOfs.left + parOfs.left;

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}

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/**

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* Translate viewport Y to selection Y

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*

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* @param y

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* Viewport Y

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* @return Selection Y

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*/

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function selY(y) {

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return y - imgOfs.top + parOfs.top;

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}

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/*

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* Translate event coordinates (relative to document) to viewport

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* coordinates

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*/

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/**

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* Get event X and translate it to viewport X

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*

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* @param event

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* The event object

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* @return Viewport X

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*/

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function evX(event) {

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return max(event.pageX || 0, touchCoords(event).x) - parOfs.left;

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}

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/**

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* Get event Y and translate it to viewport Y

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*

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* @param event

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* The event object

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* @return Viewport Y

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*/

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function evY(event) {

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return max(event.pageY || 0, touchCoords(event).y) - parOfs.top;

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}

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/**

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* Get X and Y coordinates of a touch event

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*

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* @param event

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* The event object

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* @return Coordinates object

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*/

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function touchCoords(event) {

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var oev = event.originalEvent || {};

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if (oev.touches && oev.touches.length)

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return { x: oev.touches[0].pageX, y: oev.touches[0].pageY };

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else

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return { x: 0, y: 0 };

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}

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/**

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* Get the current selection

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*

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* @param noScale

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* If set to <code>true</code>, scaling is not applied to the

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* returned selection

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* @return Selection object

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*/

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function getSelection(noScale) {

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var sx = noScale || scaleX, sy = noScale || scaleY;

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return { x1: round(selection.x1 * sx),

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y1: round(selection.y1 * sy),

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x2: round(selection.x2 * sx),

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y2: round(selection.y2 * sy),

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width: round(selection.x2 * sx) - round(selection.x1 * sx),

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height: round(selection.y2 * sy) - round(selection.y1 * sy) };

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}

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/**

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* Set the current selection

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*

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* @param x1

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* X coordinate of the upper left corner of the selection area

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* @param y1

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* Y coordinate of the upper left corner of the selection area

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* @param x2

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* X coordinate of the lower right corner of the selection area

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* @param y2

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* Y coordinate of the lower right corner of the selection area

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* @param noScale

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* If set to <code>true</code>, scaling is not applied to the

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* new selection

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*/

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function setSelection(x1, y1, x2, y2, noScale) {

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var sx = noScale || scaleX, sy = noScale || scaleY;

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selection = {

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x1: round(x1 / sx || 0),

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y1: round(y1 / sy || 0),

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x2: round(x2 / sx || 0),

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y2: round(y2 / sy || 0)

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};

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selection.width = selection.x2 - selection.x1;

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selection.height = selection.y2 - selection.y1;

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}

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/**

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* Recalculate image and parent offsets

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*/

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function adjust() {

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/*

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* Do not adjust if image has not yet loaded or if width is not a

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* positive number. The latter might happen when imgAreaSelect is put

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* on a parent element which is then hidden.

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*/

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if (!imgLoaded || !$img.width())

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return;

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/*

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* Get image offset. The .offset() method returns float values, so they

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* need to be rounded.

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*/

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

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/* Get image dimensions */

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imgWidth = $img.innerWidth();

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imgHeight = $img.innerHeight();

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imgOfs.top += ($img.outerHeight() - imgHeight) >> 1;

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imgOfs.left += ($img.outerWidth() - imgWidth) >> 1;

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/* Set minimum and maximum selection area dimensions */

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minWidth = round(options.minWidth / scaleX) || 0;

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minHeight = round(options.minHeight / scaleY) || 0;

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maxWidth = round(min(options.maxWidth / scaleX || 1<<24, imgWidth));

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maxHeight = round(min(options.maxHeight / scaleY || 1<<24, imgHeight));

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/*

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* Workaround for jQuery 1.3.2 incorrect offset calculation, originally

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* observed in Safari 3. Firefox 2 is also affected.

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*/

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

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!docElem['getBoundingClientRect'])

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{

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imgOfs.top += max(document.body.scrollTop, docElem.scrollTop);

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imgOfs.left += max(document.body.scrollLeft, docElem.scrollLeft);

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}

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/* Determine parent element offset */

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parOfs = /absolute|relative/.test($parent.css('position')) ?

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{ left: round($parent.offset().left) - $parent.scrollLeft(),

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top: round($parent.offset().top) - $parent.scrollTop() } :

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position == 'fixed' ?

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{ left: $(document).scrollLeft(), top: $(document).scrollTop() } :

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{ left: 0, top: 0 };

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left = viewX(0);

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top = viewY(0);

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/*

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* Check if selection area is within image boundaries, adjust if

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* necessary

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*/

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if (selection.x2 > imgWidth || selection.y2 > imgHeight)

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doResize();

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}

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/**

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* Update plugin elements

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*

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* @param resetKeyPress

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* If set to <code>false</code>, this instance's keypress

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* event handler is not activated

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*/

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function update(resetKeyPress) {

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/* If plugin elements are hidden, do nothing */

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if (!shown) return;

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/*

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* Set the position and size of the container box and the selection area

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* inside it

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*/

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$box.css({ left: viewX(selection.x1), top: viewY(selection.y1) })

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.add($area).width(w = selection.width).height(h = selection.height);

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/*

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* Reset the position of selection area, borders, and handles (IE6/IE7

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* position them incorrectly if we don't do this)

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*/

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$area.add($border).add($handles).css({ left: 0, top: 0 });

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/* Set border dimensions */

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$border

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.width(max(w - $border.outerWidth() + $border.innerWidth(), 0))

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.height(max(h - $border.outerHeight() + $border.innerHeight(), 0));

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/* Arrange the outer area elements */

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$($outer[0]).css({ left: left, top: top,

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width: selection.x1, height: imgHeight });

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$($outer[1]).css({ left: left + selection.x1, top: top,

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width: w, height: selection.y1 });

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$($outer[2]).css({ left: left + selection.x2, top: top,

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width: imgWidth - selection.x2, height: imgHeight });

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$($outer[3]).css({ left: left + selection.x1, top: top + selection.y2,

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width: w, height: imgHeight - selection.y2 });

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w -= $handles.outerWidth();

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h -= $handles.outerHeight();

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/* Arrange handles */

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switch ($handles.length) {

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case 8:

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$($handles[4]).css({ left: w >> 1 });

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$($handles[5]).css({ left: w, top: h >> 1 });

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$($handles[6]).css({ left: w >> 1, top: h });

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$($handles[7]).css({ top: h >> 1 });

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case 4:

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$handles.slice(1,3).css({ left: w });

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$handles.slice(2,4).css({ top: h });

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}

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if (resetKeyPress !== false) {

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/*

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* Need to reset the document keypress event handler -- unbind the

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* current handler

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*/

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if ($.imgAreaSelect.onKeyPress != docKeyPress)

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$(document).off($.imgAreaSelect.keyPress,

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$.imgAreaSelect.onKeyPress);

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if (options.keys)

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/*

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* Set the document keypress event handler to this instance's

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* docKeyPress() function

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*/

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$(document).on( $.imgAreaSelect.keyPress, function() {

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$.imgAreaSelect.onKeyPress = docKeyPress;

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});

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}

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/*

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* Internet Explorer displays 1px-wide dashed borders incorrectly by

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* filling the spaces between dashes with white. Toggling the margin

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* property between 0 and "auto" fixes this in IE6 and IE7 (IE8 is still

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* broken). This workaround is not perfect, as it requires setTimeout()

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* and thus causes the border to flicker a bit, but I haven't found a

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* better solution.

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*

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* Note: This only happens with CSS borders, set with the borderWidth,

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* borderOpacity, borderColor1, and borderColor2 options (which are now

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* deprecated). Borders created with GIF background images are fine.

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*/

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if (msie && $border.outerWidth() - $border.innerWidth() == 2) {

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$border.css('margin', 0);

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setTimeout(function () { $border.css('margin', 'auto'); }, 0);

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}

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}

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/**

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* Do the complete update sequence: recalculate offsets, update the

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* elements, and set the correct values of x1, y1, x2, and y2.

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*

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* @param resetKeyPress

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* If set to <code>false</code>, this instance's keypress

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* event handler is not activated

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*/

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function doUpdate(resetKeyPress) {

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adjust();

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update(resetKeyPress);

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x1 = viewX(selection.x1); y1 = viewY(selection.y1);

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x2 = viewX(selection.x2); y2 = viewY(selection.y2);

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}

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/**

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* Hide or fade out an element (or multiple elements)

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*

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* @param $elem

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* A jQuery object containing the element(s) to hide/fade out

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* @param fn

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* Callback function to be called when fadeOut() completes

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*/

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function hide($elem, fn) {

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options.fadeSpeed ? $elem.fadeOut(options.fadeSpeed, fn) : $elem.hide();

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}

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/**

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* Selection area mousemove event handler

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*

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* @param event

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* The event object

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*/

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function areaMouseMove(event) {

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var x = selX(evX(event)) - selection.x1,

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y = selY(evY(event)) - selection.y1;

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if (!adjusted) {

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adjust();

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adjusted = true;

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$box.one('mouseout', function () { adjusted = false; });

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}

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/* Clear the resize mode */

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resize = '';

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if (options.resizable) {

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/*

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* Check if the mouse pointer is over the resize margin area and set

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* the resize mode accordingly

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*/

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if (y <= options.resizeMargin)

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resize = 'n';

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

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resize = 's';

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if (x <= options.resizeMargin)

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resize += 'w';

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else if (x >= selection.width - options.resizeMargin)

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resize += 'e';

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}

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$box.css('cursor', resize ? resize + '-resize' :

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options.movable ? 'move' : '');

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if ($areaOpera)

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$areaOpera.toggle();

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}

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/**

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* Document mouseup event handler

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*

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* @param event

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* The event object

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*/

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function docMouseUp(event) {

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/* Set back the default cursor */

[496] Fix | Delete

$('body').css('cursor', '');

[497] Fix | Delete

/*

[498] Fix | Delete

* If autoHide is enabled, or if the selection has zero width/height,

[499] Fix | Delete