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✏️ Editing: croppie.js

/*************************
 * Croppie
 * Copyright 2019
 * Foliotek
 * Version: 2.6.4
 *************************/
(function (root, factory) {
    if (typeof define === 'function' && define.amd) {
        // AMD. Register as an anonymous module.
        define(factory);
    } else if (typeof exports === 'object' && typeof exports.nodeName !== 'string') {
        // CommonJS
        module.exports = factory();
    } else {
        // Browser globals
        root.Croppie = factory();
    }
}(typeof self !== 'undefined' ? self : this, function () {

/* Polyfills */
    if (typeof Promise !== 'function') {
        /*! promise-polyfill 3.1.0 */
        !function(a){function b(a,b){return function(){a.apply(b,arguments)}}function c(a){if("object"!==typeof this)throw new TypeError("Promises must be constructed via new");if("function"!==typeof a)throw new TypeError("not a function");this._state=null,this._value=null,this._deferreds=[],i(a,b(e,this),b(f,this))}function d(a){var b=this;return null===this._state?void this._deferreds.push(a):void k(function(){var c=b._state?a.onFulfilled:a.onRejected;if(null===c)return void(b._state?a.resolve:a.reject)(b._value);var d;try{d=c(b._value)}catch(e){return void a.reject(e)}a.resolve(d)})}function e(a){try{if(a===this)throw new TypeError("A promise cannot be resolved with itself.");if(a&&("object"===typeof a||"function"===typeof a)){var c=a.then;if("function"===typeof c)return void i(b(c,a),b(e,this),b(f,this))}this._state=!0,this._value=a,g.call(this)}catch(d){f.call(this,d)}}function f(a){this._state=!1,this._value=a,g.call(this)}function g(){for(var a=0,b=this._deferreds.length;b>a;a++)d.call(this,this._deferreds[a]);this._deferreds=null}function h(a,b,c,d){this.onFulfilled="function"===typeof a?a:null,this.onRejected="function"===typeof b?b:null,this.resolve=c,this.reject=d}function i(a,b,c){var d=!1;try{a(function(a){d||(d=!0,b(a))},function(a){d||(d=!0,c(a))})}catch(e){if(d)return;d=!0,c(e)}}var j=setTimeout,k="function"===typeof setImmediate&&setImmediate||function(a){j(a,1)},l=Array.isArray||function(a){return"[object Array]"===Object.prototype.toString.call(a)};c.prototype["catch"]=function(a){return this.then(null,a)},c.prototype.then=function(a,b){var e=this;return new c(function(c,f){d.call(e,new h(a,b,c,f))})},c.all=function(){var a=Array.prototype.slice.call(1===arguments.length&&l(arguments[0])?arguments[0]:arguments);return new c(function(b,c){function d(f,g){try{if(g&&("object"===typeof g||"function"===typeof g)){var h=g.then;if("function"===typeof h)return void h.call(g,function(a){d(f,a)},c)}a[f]=g,0===--e&&b(a)}catch(i){c(i)}}if(0===a.length)return b([]);for(var e=a.length,f=0;f<a.length;f++)d(f,a[f])})},c.resolve=function(a){return a&&"object"===typeof a&&a.constructor===c?a:new c(function(b){b(a)})},c.reject=function(a){return new c(function(b,c){c(a)})},c.race=function(a){return new c(function(b,c){for(var d=0,e=a.length;e>d;d++)a[d].then(b,c)})},c._setImmediateFn=function(a){k=a},"undefined"!==typeof module&&module.exports?module.exports=c:a.Promise||(a.Promise=c)}(this);
    }

if ( typeof window.CustomEvent !== "function" ) {
        (function(){
            function CustomEvent ( event, params ) {
                params = params || { bubbles: false, cancelable: false, detail: undefined };
                var evt = document.createEvent( 'CustomEvent' );
                evt.initCustomEvent( event, params.bubbles, params.cancelable, params.detail );
                return evt;
            }
            CustomEvent.prototype = window.Event.prototype;
            window.CustomEvent = CustomEvent;
        }());
    }

if (!HTMLCanvasElement.prototype.toBlob) {
        Object.defineProperty(HTMLCanvasElement.prototype, 'toBlob', {
            value: function (callback, type, quality) {
                var binStr = atob( this.toDataURL(type, quality).split(',')[1] ),
                len = binStr.length,
                arr = new Uint8Array(len);

for (var i=0; i<len; i++ ) {
                    arr[i] = binStr.charCodeAt(i);
                }

callback( new Blob( [arr], {type: type || 'image/png'} ) );
            }
        });
    }
    /* End Polyfills */

var cssPrefixes = ['Webkit', 'Moz', 'ms'],
        emptyStyles = document.createElement('div').style,
        EXIF_NORM = [1,8,3,6],
        EXIF_FLIP = [2,7,4,5],
        CSS_TRANS_ORG,
        CSS_TRANSFORM,
        CSS_USERSELECT;

function vendorPrefix(prop) {
        if (prop in emptyStyles) {
            return prop;
        }

var capProp = prop[0].toUpperCase() + prop.slice(1),
            i = cssPrefixes.length;

while (i--) {
            prop = cssPrefixes[i] + capProp;
            if (prop in emptyStyles) {
                return prop;
            }
        }
    }

CSS_TRANSFORM = vendorPrefix('transform');
    CSS_TRANS_ORG = vendorPrefix('transformOrigin');
    CSS_USERSELECT = vendorPrefix('userSelect');

function getExifOffset(ornt, rotate) {
        var arr = EXIF_NORM.indexOf(ornt) > -1 ? EXIF_NORM : EXIF_FLIP,
            index = arr.indexOf(ornt),
            offset = (rotate / 90) % arr.length;// 180 = 2%4 = 2 shift exif by 2 indexes

return arr[(arr.length + index + (offset % arr.length)) % arr.length];
    }

// Credits to : Andrew Dupont - http://andrewdupont.net/2009/08/28/deep-extending-objects-in-javascript/
    function deepExtend(destination, source) {
        destination = destination || {};
        for (var property in source) {
            if (source[property] && source[property].constructor && source[property].constructor === Object) {
                destination[property] = destination[property] || {};
                deepExtend(destination[property], source[property]);
            } else {
                destination[property] = source[property];
            }
        }
        return destination;
    }

function clone(object) {
        return deepExtend({}, object);
    }

//http://jsperf.com/vanilla-css
    function css(el, styles, val) {
        if (typeof (styles) === 'string') {
            var tmp = styles;
            styles = {};
            styles[tmp] = val;
        }

for (var prop in styles) {
            el.style[prop] = styles[prop];
        }
    }

function addClass(el, c) {
        if (el.classList) {
            el.classList.add(c);
        }
        else {
            el.className += ' ' + c;
        }
    }

function removeClass(el, c) {
        if (el.classList) {
            el.classList.remove(c);
        }
        else {
            el.className = el.className.replace(c, '');
        }
    }

function setAttributes(el, attrs) {
        for (var key in attrs) {
            el.setAttribute(key, attrs[key]);
        }
    }

function num(v) {
        return parseInt(v, 10);
    }

/* Utilities */
    function loadImage(src, doExif) {
        var img = new Image();
        img.style.opacity = '0';
        return new Promise(function (resolve, reject) {
            function _resolve() {
                img.style.opacity = '1';
                setTimeout(function () {
                    resolve(img);
                }, 1);
            }

img.removeAttribute('crossOrigin');
            if (src.match(/^https?:\/\/|^\/\//)) {
                img.setAttribute('crossOrigin', 'anonymous');
            }

img.onload = function () {
                if (doExif) {
                    EXIF.getData(img, function () {
                        _resolve();
                    });
                }
                else {
                    _resolve();
                }
            };
            img.onerror = function (ev) {
                img.style.opacity = 1;
                setTimeout(function () {
                    reject(ev);
                }, 1);
            };
            img.src = src;
        });
    }

/* CSS Transform Prototype */
    var TRANSLATE_OPTS = {
        'translate3d': {
            suffix: ', 0px'
        },
        'translate': {
            suffix: ''
        }
    };
    var Transform = function (x, y, scale) {
        this.x = parseFloat(x);
        this.y = parseFloat(y);
        this.scale = parseFloat(scale);
    };

Transform.parse = function (v) {
        if (v.style) {
            return Transform.parse(v.style[CSS_TRANSFORM]);
        }
        else if (v.indexOf('matrix') > -1 || v.indexOf('none') > -1) {
            return Transform.fromMatrix(v);
        }
        else {
            return Transform.fromString(v);
        }
    };

Transform.fromMatrix = function (v) {
        var vals = v.substring(7).split(',');
        if (!vals.length || v === 'none') {
            vals = [1, 0, 0, 1, 0, 0];
        }

return new Transform(num(vals[4]), num(vals[5]), parseFloat(vals[0]));
    };

Transform.fromString = function (v) {
        var values = v.split(') '),
            translate = values[0].substring(Croppie.globals.translate.length + 1).split(','),
            scale = values.length > 1 ? values[1].substring(6) : 1,
            x = translate.length > 1 ? translate[0] : 0,
            y = translate.length > 1 ? translate[1] : 0;

return new Transform(x, y, scale);
    };

Transform.prototype.toString = function () {
        var suffix = TRANSLATE_OPTS[Croppie.globals.translate].suffix || '';
        return Croppie.globals.translate + '(' + this.x + 'px, ' + this.y + 'px' + suffix + ') scale(' + this.scale + ')';
    };

var TransformOrigin = function (el) {
        if (!el || !el.style[CSS_TRANS_ORG]) {
            this.x = 0;
            this.y = 0;
            return;
        }
        var css = el.style[CSS_TRANS_ORG].split(' ');
        this.x = parseFloat(css[0]);
        this.y = parseFloat(css[1]);
    };

TransformOrigin.prototype.toString = function () {
        return this.x + 'px ' + this.y + 'px';
    };

function getExifOrientation (img) {
        return img.exifdata && img.exifdata.Orientation ? num(img.exifdata.Orientation) : 1;
    }

function drawCanvas(canvas, img, orientation) {
        var width = img.width,
            height = img.height,
            ctx = canvas.getContext('2d');

canvas.width = img.width;
        canvas.height = img.height;

ctx.save();
        switch (orientation) {
          case 2:
             ctx.translate(width, 0);
             ctx.scale(-1, 1);
             break;

case 3:
              ctx.translate(width, height);
              ctx.rotate(180*Math.PI/180);
              break;

case 4:
              ctx.translate(0, height);
              ctx.scale(1, -1);
              break;

case 5:
              canvas.width = height;
              canvas.height = width;
              ctx.rotate(90*Math.PI/180);
              ctx.scale(1, -1);
              break;

case 6:
              canvas.width = height;
              canvas.height = width;
              ctx.rotate(90*Math.PI/180);
              ctx.translate(0, -height);
              break;

case 7:
              canvas.width = height;
              canvas.height = width;
              ctx.rotate(-90*Math.PI/180);
              ctx.translate(-width, height);
              ctx.scale(1, -1);
              break;

case 8:
              canvas.width = height;
              canvas.height = width;
              ctx.translate(0, width);
              ctx.rotate(-90*Math.PI/180);
              break;
        }
        ctx.drawImage(img, 0,0, width, height);
        ctx.restore();
    }

/* Private Methods */
    function _create() {
        var self = this,
            contClass = 'croppie-container',
            customViewportClass = self.options.viewport.type ? 'cr-vp-' + self.options.viewport.type : null,
            boundary, img, viewport, overlay, bw, bh;

self.options.useCanvas = self.options.enableOrientation || _hasExif.call(self);
        // Properties on class
        self.data = {};
        self.elements = {};

boundary = self.elements.boundary = document.createElement('div');
        viewport = self.elements.viewport = document.createElement('div');
        img = self.elements.img = document.createElement('img');
        overlay = self.elements.overlay = document.createElement('div');

if (self.options.useCanvas) {
            self.elements.canvas = document.createElement('canvas');
            self.elements.preview = self.elements.canvas;
        }
        else {
            self.elements.preview = img;
        }

addClass(boundary, 'cr-boundary');
        boundary.setAttribute('aria-dropeffect', 'none');
        bw = self.options.boundary.width;
        bh = self.options.boundary.height;
        css(boundary, {
            width: (bw + (isNaN(bw) ? '' : 'px')),
            height: (bh + (isNaN(bh) ? '' : 'px'))
        });

addClass(viewport, 'cr-viewport');
        if (customViewportClass) {
            addClass(viewport, customViewportClass);
        }
        css(viewport, {
            width: self.options.viewport.width + 'px',
            height: self.options.viewport.height + 'px'
        });
        viewport.setAttribute('tabindex', 0);

addClass(self.elements.preview, 'cr-image');
        setAttributes(self.elements.preview, { 'alt': 'preview', 'aria-grabbed': 'false' });
        addClass(overlay, 'cr-overlay');

self.element.appendChild(boundary);
        boundary.appendChild(self.elements.preview);
        boundary.appendChild(viewport);
        boundary.appendChild(overlay);

addClass(self.element, contClass);
        if (self.options.customClass) {
            addClass(self.element, self.options.customClass);
        }

_initDraggable.call(this);

if (self.options.enableZoom) {
            _initializeZoom.call(self);
        }

// if (self.options.enableOrientation) {
        //     _initRotationControls.call(self);
        // }

if (self.options.enableResize) {
            _initializeResize.call(self);
        }
    }

// function _initRotationControls () {
    //     var self = this,
    //         wrap, btnLeft, btnRight, iLeft, iRight;

//     wrap = document.createElement('div');
    //     self.elements.orientationBtnLeft = btnLeft = document.createElement('button');
    //     self.elements.orientationBtnRight = btnRight = document.createElement('button');

//     wrap.appendChild(btnLeft);
    //     wrap.appendChild(btnRight);

//     iLeft = document.createElement('i');
    //     iRight = document.createElement('i');
    //     btnLeft.appendChild(iLeft);
    //     btnRight.appendChild(iRight);

//     addClass(wrap, 'cr-rotate-controls');
    //     addClass(btnLeft, 'cr-rotate-l');
    //     addClass(btnRight, 'cr-rotate-r');

//     self.elements.boundary.appendChild(wrap);

//     btnLeft.addEventListener('click', function () {
    //         self.rotate(-90);
    //     });
    //     btnRight.addEventListener('click', function () {
    //         self.rotate(90);
    //     });
    // }

function _hasExif() {
        return this.options.enableExif && window.EXIF;
    }

function _initializeResize () {
        var self = this;
        var wrap = document.createElement('div');
        var isDragging = false;
        var direction;
        var originalX;
        var originalY;
        var minSize = 50;
        var maxWidth;
        var maxHeight;
        var vr;
        var hr;

addClass(wrap, 'cr-resizer');
        css(wrap, {
            width: this.options.viewport.width + 'px',
            height: this.options.viewport.height + 'px'
        });

if (this.options.resizeControls.height) {
            vr = document.createElement('div');
            addClass(vr, 'cr-resizer-vertical');
            wrap.appendChild(vr);
        }

if (this.options.resizeControls.width) {
            hr = document.createElement('div');
            addClass(hr, 'cr-resizer-horisontal');
            wrap.appendChild(hr);
        }

function mouseDown(ev) {
            if (ev.button !== undefined && ev.button !== 0) return;

ev.preventDefault();
            if (isDragging) {
                return;
            }

var overlayRect = self.elements.overlay.getBoundingClientRect();

isDragging = true;
            originalX = ev.pageX;
            originalY = ev.pageY;
            direction = ev.currentTarget.className.indexOf('vertical') !== -1 ? 'v' : 'h';
            maxWidth = overlayRect.width;
            maxHeight = overlayRect.height;

if (ev.touches) {
                var touches = ev.touches[0];
                originalX = touches.pageX;
                originalY = touches.pageY;
            }

window.addEventListener('mousemove', mouseMove);
            window.addEventListener('touchmove', mouseMove);
            window.addEventListener('mouseup', mouseUp);
            window.addEventListener('touchend', mouseUp);
            document.body.style[CSS_USERSELECT] = 'none';
        }

function mouseMove(ev) {
            var pageX = ev.pageX;
            var pageY = ev.pageY;

ev.preventDefault();

if (ev.touches) {
                var touches = ev.touches[0];
                pageX = touches.pageX;
                pageY = touches.pageY;
            }

var deltaX = pageX - originalX;
            var deltaY = pageY - originalY;
            var newHeight = self.options.viewport.height + deltaY;
            var newWidth = self.options.viewport.width + deltaX;

if (direction === 'v' && newHeight >= minSize && newHeight <= maxHeight) {
                css(wrap, {
                    height: newHeight + 'px'
                });

self.options.boundary.height += deltaY;
                css(self.elements.boundary, {
                    height: self.options.boundary.height + 'px'
                });

self.options.viewport.height += deltaY;
                css(self.elements.viewport, {
                    height: self.options.viewport.height + 'px'
                });
            }
            else if (direction === 'h' && newWidth >= minSize && newWidth <= maxWidth) {
                css(wrap, {
                    width: newWidth + 'px'
                });

self.options.boundary.width += deltaX;
                css(self.elements.boundary, {
                    width: self.options.boundary.width + 'px'
                });

self.options.viewport.width += deltaX;
                css(self.elements.viewport, {
                    width: self.options.viewport.width + 'px'
                });
            }

_updateOverlay.call(self);
            _updateZoomLimits.call(self);
            _updateCenterPoint.call(self);
            _triggerUpdate.call(self);
            originalY = pageY;
            originalX = pageX;
        }

function mouseUp() {
            isDragging = false;
            window.removeEventListener('mousemove', mouseMove);
            window.removeEventListener('touchmove', mouseMove);
            window.removeEventListener('mouseup', mouseUp);
            window.removeEventListener('touchend', mouseUp);
            document.body.style[CSS_USERSELECT] = '';
        }

if (vr) {
            vr.addEventListener('mousedown', mouseDown);
            vr.addEventListener('touchstart', mouseDown);
        }

if (hr) {
            hr.addEventListener('mousedown', mouseDown);
            hr.addEventListener('touchstart', mouseDown);
        }

this.elements.boundary.appendChild(wrap);
    }

function _setZoomerVal(v) {
        if (this.options.enableZoom) {
            var z = this.elements.zoomer,
                val = fix(v, 4);

z.value = Math.max(parseFloat(z.min), Math.min(parseFloat(z.max), val)).toString();
        }
    }

function _initializeZoom() {
        var self = this,
            wrap = self.elements.zoomerWrap = document.createElement('div'),
            zoomer = self.elements.zoomer = document.createElement('input');

addClass(wrap, 'cr-slider-wrap');
        addClass(zoomer, 'cr-slider');
        zoomer.type = 'range';
        zoomer.step = '0.0001';
        zoomer.value = '1';
        zoomer.style.display = self.options.showZoomer ? '' : 'none';
        zoomer.setAttribute('aria-label', 'zoom');

self.element.appendChild(wrap);
        wrap.appendChild(zoomer);

self._currentZoom = 1;

function change() {
            _onZoom.call(self, {
                value: parseFloat(zoomer.value),
                origin: new TransformOrigin(self.elements.preview),
                viewportRect: self.elements.viewport.getBoundingClientRect(),
                transform: Transform.parse(self.elements.preview)
            });
        }

function scroll(ev) {
            var delta, targetZoom;

if(self.options.mouseWheelZoom === 'ctrl' && ev.ctrlKey !== true){
              return 0; 
            } else if (ev.wheelDelta) {
                delta = ev.wheelDelta / 1200; //wheelDelta min: -120 max: 120 // max x 10 x 2
            } else if (ev.deltaY) {
                delta = ev.deltaY / 1060; //deltaY min: -53 max: 53 // max x 10 x 2
            } else if (ev.detail) {
                delta = ev.detail / -60; //delta min: -3 max: 3 // max x 10 x 2
            } else {
                delta = 0;
            }

targetZoom = self._currentZoom + (delta * self._currentZoom);

ev.preventDefault();
            _setZoomerVal.call(self, targetZoom);
            change.call(self);
        }

self.elements.zoomer.addEventListener('input', change);// this is being fired twice on keypress
        self.elements.zoomer.addEventListener('change', change);

if (self.options.mouseWheelZoom) {
            self.elements.boundary.addEventListener('mousewheel', scroll);
            self.elements.boundary.addEventListener('DOMMouseScroll', scroll);
        }
    }

function _onZoom(ui) {
        var self = this,
            transform = ui ? ui.transform : Transform.parse(self.elements.preview),
            vpRect = ui ? ui.viewportRect : self.elements.viewport.getBoundingClientRect(),
            origin = ui ? ui.origin : new TransformOrigin(self.elements.preview);

function applyCss() {
            var transCss = {};
            transCss[CSS_TRANSFORM] = transform.toString();
            transCss[CSS_TRANS_ORG] = origin.toString();
            css(self.elements.preview, transCss);
        }

self._currentZoom = ui ? ui.value : self._currentZoom;
        transform.scale = self._currentZoom;
        self.elements.zoomer.setAttribute('aria-valuenow', self._currentZoom);
        applyCss();

if (self.options.enforceBoundary) {
            var boundaries = _getVirtualBoundaries.call(self, vpRect),
                transBoundaries = boundaries.translate,
                oBoundaries = boundaries.origin;

if (transform.x >= transBoundaries.maxX) {
                origin.x = oBoundaries.minX;
                transform.x = transBoundaries.maxX;
            }

if (transform.x <= transBoundaries.minX) {
                origin.x = oBoundaries.maxX;
                transform.x = transBoundaries.minX;
            }

if (transform.y >= transBoundaries.maxY) {
                origin.y = oBoundaries.minY;
                transform.y = transBoundaries.maxY;
            }

if (transform.y <= transBoundaries.minY) {
                origin.y = oBoundaries.maxY;
                transform.y = transBoundaries.minY;
            }
        }
        applyCss();
        _debouncedOverlay.call(self);
        _triggerUpdate.call(self);
    }

function _getVirtualBoundaries(viewport) {
        var self = this,
            scale = self._currentZoom,
            vpWidth = viewport.width,
            vpHeight = viewport.height,
            centerFromBoundaryX = self.elements.boundary.clientWidth / 2,
            centerFromBoundaryY = self.elements.boundary.clientHeight / 2,
            imgRect = self.elements.preview.getBoundingClientRect(),
            curImgWidth = imgRect.width,
            curImgHeight = imgRect.height,
            halfWidth = vpWidth / 2,
            halfHeight = vpHeight / 2;

var maxX = ((halfWidth / scale) - centerFromBoundaryX) * -1;
        var minX = maxX - ((curImgWidth * (1 / scale)) - (vpWidth * (1 / scale)));

var maxY = ((halfHeight / scale) - centerFromBoundaryY) * -1;
        var minY = maxY - ((curImgHeight * (1 / scale)) - (vpHeight * (1 / scale)));

var originMinX = (1 / scale) * halfWidth;
        var originMaxX = (curImgWidth * (1 / scale)) - originMinX;

var originMinY = (1 / scale) * halfHeight;
        var originMaxY = (curImgHeight * (1 / scale)) - originMinY;

return {
            translate: {
                maxX: maxX,
                minX: minX,
                maxY: maxY,
                minY: minY
            },
            origin: {
                maxX: originMaxX,
                minX: originMinX,
                maxY: originMaxY,
                minY: originMinY
            }
        };
    }

function _updateCenterPoint(rotate) {
        var self = this,
            scale = self._currentZoom,
            data = self.elements.preview.getBoundingClientRect(),
            vpData = self.elements.viewport.getBoundingClientRect(),
            transform = Transform.parse(self.elements.preview.style[CSS_TRANSFORM]),
            pc = new TransformOrigin(self.elements.preview),
            top = (vpData.top - data.top) + (vpData.height / 2),
            left = (vpData.left - data.left) + (vpData.width / 2),
            center = {},
            adj = {};

if (rotate) {
            var cx = pc.x;
            var cy = pc.y;
            var tx = transform.x;
            var ty = transform.y;

center.y = cx;
            center.x = cy;
            transform.y = tx;
            transform.x = ty;
        }
        else {
            center.y = top / scale;
            center.x = left / scale;

adj.y = (center.y - pc.y) * (1 - scale);
            adj.x = (center.x - pc.x) * (1 - scale);

transform.x -= adj.x;
            transform.y -= adj.y;
        }

var newCss = {};
        newCss[CSS_TRANS_ORG] = center.x + 'px ' + center.y + 'px';
        newCss[CSS_TRANSFORM] = transform.toString();
        css(self.elements.preview, newCss);
    }

function _initDraggable() {
        var self = this,
            isDragging = false,
            originalX,
            originalY,
            originalDistance,
            vpRect,
            transform;

function assignTransformCoordinates(deltaX, deltaY) {
            var imgRect = self.elements.preview.getBoundingClientRect(),
                top = transform.y + deltaY,
                left = transform.x + deltaX;

if (self.options.enforceBoundary) {
                if (vpRect.top > imgRect.top + deltaY && vpRect.bottom < imgRect.bottom + deltaY) {
                    transform.y = top;
                }

if (vpRect.left > imgRect.left + deltaX && vpRect.right < imgRect.right + deltaX) {
                    transform.x = left;
                }
            }
            else {
                transform.y = top;
                transform.x = left;
            }
        }

function toggleGrabState(isDragging) {
          self.elements.preview.setAttribute('aria-grabbed', isDragging);
          self.elements.boundary.setAttribute('aria-dropeffect', isDragging? 'move': 'none');
        }

function keyDown(ev) {
            var LEFT_ARROW  = 37,
                UP_ARROW    = 38,
                RIGHT_ARROW = 39,
                DOWN_ARROW  = 40;

if (ev.shiftKey && (ev.keyCode === UP_ARROW || ev.keyCode === DOWN_ARROW)) {
                var zoom;
                if (ev.keyCode === UP_ARROW) {
                    zoom = parseFloat(self.elements.zoomer.value) + parseFloat(self.elements.zoomer.step)
                }
                else {
                    zoom = parseFloat(self.elements.zoomer.value) - parseFloat(self.elements.zoomer.step)
                }
                self.setZoom(zoom);
            }
            else if (self.options.enableKeyMovement && (ev.keyCode >= 37 && ev.keyCode <= 40)) {
                ev.preventDefault();
                var movement = parseKeyDown(ev.keyCode);

transform = Transform.parse(self.elements.preview);
                document.body.style[CSS_USERSELECT] = 'none';
                vpRect = self.elements.viewport.getBoundingClientRect();
                keyMove(movement);
            }

function parseKeyDown(key) {
                switch (key) {
                    case LEFT_ARROW:
                        return [1, 0];
                    case UP_ARROW:
                        return [0, 1];
                    case RIGHT_ARROW:
                        return [-1, 0];
                    case DOWN_ARROW:
                        return [0, -1];
                }
            }
        }

function keyMove(movement) {
            var deltaX = movement[0],
                deltaY = movement[1],
                newCss = {};

assignTransformCoordinates(deltaX, deltaY);

newCss[CSS_TRANSFORM] = transform.toString();
            css(self.elements.preview, newCss);
            _updateOverlay.call(self);
            document.body.style[CSS_USERSELECT] = '';
            _updateCenterPoint.call(self);
            _triggerUpdate.call(self);
            originalDistance = 0;
        }

function mouseDown(ev) {
            if (ev.button !== undefined && ev.button !== 0) return;

ev.preventDefault();
            if (isDragging) return;
            isDragging = true;
            originalX = ev.pageX;
            originalY = ev.pageY;

if (ev.touches) {
                var touches = ev.touches[0];
                originalX = touches.pageX;
                originalY = touches.pageY;
            }
            toggleGrabState(isDragging);
            transform = Transform.parse(self.elements.preview);
            window.addEventListener('mousemove', mouseMove);
            window.addEventListener('touchmove', mouseMove);
            window.addEventListener('mouseup', mouseUp);
            window.addEventListener('touchend', mouseUp);
            document.body.style[CSS_USERSELECT] = 'none';
            vpRect = self.elements.viewport.getBoundingClientRect();
        }

function mouseMove(ev) {
            ev.preventDefault();
            var pageX = ev.pageX,
                pageY = ev.pageY;

if (ev.touches) {
                var touches = ev.touches[0];
                pageX = touches.pageX;
                pageY = touches.pageY;
            }

var deltaX = pageX - originalX,
                deltaY = pageY - originalY,
                newCss = {};

if (ev.type === 'touchmove') {
                if (ev.touches.length > 1) {
                    var touch1 = ev.touches[0];
                    var touch2 = ev.touches[1];
                    var dist = Math.sqrt((touch1.pageX - touch2.pageX) * (touch1.pageX - touch2.pageX) + (touch1.pageY - touch2.pageY) * (touch1.pageY - touch2.pageY));

if (!originalDistance) {
                        originalDistance = dist / self._currentZoom;
                    }

var scale = dist / originalDistance;

_setZoomerVal.call(self, scale);
                    dispatchChange(self.elements.zoomer);
                    return;
                }
            }

assignTransformCoordinates(deltaX, deltaY);

newCss[CSS_TRANSFORM] = transform.toString();
            css(self.elements.preview, newCss);
            _updateOverlay.call(self);
            originalY = pageY;
            originalX = pageX;
        }

function mouseUp() {
            isDragging = false;
            toggleGrabState(isDragging);
            window.removeEventListener('mousemove', mouseMove);
            window.removeEventListener('touchmove', mouseMove);
            window.removeEventListener('mouseup', mouseUp);
            window.removeEventListener('touchend', mouseUp);
            document.body.style[CSS_USERSELECT] = '';
            _updateCenterPoint.call(self);
            _triggerUpdate.call(self);
            originalDistance = 0;
        }

self.elements.overlay.addEventListener('mousedown', mouseDown);
        self.elements.viewport.addEventListener('keydown', keyDown);
        self.elements.overlay.addEventListener('touchstart', mouseDown);
    }

function _updateOverlay() {
        if (!this.elements) return; // since this is debounced, it can be fired after destroy
        var self = this,
            boundRect = self.elements.boundary.getBoundingClientRect(),
            imgData = self.elements.preview.getBoundingClientRect();

css(self.elements.overlay, {
            width: imgData.width + 'px',
            height: imgData.height + 'px',
            top: (imgData.top - boundRect.top) + 'px',
            left: (imgData.left - boundRect.left) + 'px'
        });
    }
    var _debouncedOverlay = debounce(_updateOverlay, 500);

function _triggerUpdate() {
        var self = this,
            data = self.get();

if (!_isVisible.call(self)) {
            return;
        }

self.options.update.call(self, data);
        if (self.$ && typeof Prototype === 'undefined') {
            self.$(self.element).trigger('update.croppie', data);
        }
        else {
            var ev;
            if (window.CustomEvent) {
                ev = new CustomEvent('update', { detail: data });
            } else {
                ev = document.createEvent('CustomEvent');
                ev.initCustomEvent('update', true, true, data);
            }

self.element.dispatchEvent(ev);
        }
    }

function _isVisible() {
        return this.elements.preview.offsetHeight > 0 && this.elements.preview.offsetWidth > 0;
    }

function _updatePropertiesFromImage() {
        var self = this,
            initialZoom = 1,
            cssReset = {},
            img = self.elements.preview,
            imgData,
            transformReset = new Transform(0, 0, initialZoom),
            originReset = new TransformOrigin(),
            isVisible = _isVisible.call(self);

if (!isVisible || self.data.bound) {// if the croppie isn't visible or it doesn't need binding
            return;
        }

self.data.bound = true;
        cssReset[CSS_TRANSFORM] = transformReset.toString();
        cssReset[CSS_TRANS_ORG] = originReset.toString();
        cssReset['opacity'] = 1;
        css(img, cssReset);

imgData = self.elements.preview.getBoundingClientRect();

self._originalImageWidth = imgData.width;
        self._originalImageHeight = imgData.height;
        self.data.orientation = getExifOrientation(self.elements.img);

if (self.options.enableZoom) {
            _updateZoomLimits.call(self, true);
        }
        else {
            self._currentZoom = initialZoom;
        }

transformReset.scale = self._currentZoom;
        cssReset[CSS_TRANSFORM] = transformReset.toString();
        css(img, cssReset);

if (self.data.points.length) {
            _bindPoints.call(self, self.data.points);
        }
        else {
            _centerImage.call(self);
        }

_updateCenterPoint.call(self);
        _updateOverlay.call(self);
    }

function _updateZoomLimits (initial) {
        var self = this,
            minZoom = Math.max(self.options.minZoom, 0) || 0,
            maxZoom = self.options.maxZoom || 1.5,
            initialZoom,
            defaultInitialZoom,
            zoomer = self.elements.zoomer,
            scale = parseFloat(zoomer.value),
            boundaryData = self.elements.boundary.getBoundingClientRect(),
            imgData = naturalImageDimensions(self.elements.img, self.data.orientation),
            vpData = self.elements.viewport.getBoundingClientRect(),
            minW,
            minH;
        if (self.options.enforceBoundary) {
            minW = vpData.width / imgData.width;
            minH = vpData.height / imgData.height;
            minZoom = Math.max(minW, minH);
        }

if (minZoom >= maxZoom) {
            maxZoom = minZoom + 1;
        }

zoomer.min = fix(minZoom, 4);
        zoomer.max = fix(maxZoom, 4);
        
        if (!initial && (scale < zoomer.min || scale > zoomer.max)) {
            _setZoomerVal.call(self, scale < zoomer.min ? zoomer.min : zoomer.max);
        }
        else if (initial) {
            defaultInitialZoom = Math.max((boundaryData.width / imgData.width), (boundaryData.height / imgData.height));
            initialZoom = self.data.boundZoom !== null ? self.data.boundZoom : defaultInitialZoom;
            _setZoomerVal.call(self, initialZoom);
        }

dispatchChange(zoomer);
    }

function _bindPoints(points) {
        if (points.length !== 4) {
            throw "Croppie - Invalid number of points supplied: " + points;
        }
        var self = this,
            pointsWidth = points[2] - points[0],
            // pointsHeight = points[3] - points[1],
            vpData = self.elements.viewport.getBoundingClientRect(),
            boundRect = self.elements.boundary.getBoundingClientRect(),
            vpOffset = {
                left: vpData.left - boundRect.left,
                top: vpData.top - boundRect.top
            },
            scale = vpData.width / pointsWidth,
            originTop = points[1],
            originLeft = points[0],
            transformTop = (-1 * points[1]) + vpOffset.top,
            transformLeft = (-1 * points[0]) + vpOffset.left,
            newCss = {};

newCss[CSS_TRANS_ORG] = originLeft + 'px ' + originTop + 'px';
        newCss[CSS_TRANSFORM] = new Transform(transformLeft, transformTop, scale).toString();
        css(self.elements.preview, newCss);

_setZoomerVal.call(self, scale);
        self._currentZoom = scale;
    }

function _centerImage() {
        var self = this,
            imgDim = self.elements.preview.getBoundingClientRect(),
            vpDim = self.elements.viewport.getBoundingClientRect(),
            boundDim = self.elements.boundary.getBoundingClientRect(),
            vpLeft = vpDim.left - boundDim.left,
            vpTop = vpDim.top - boundDim.top,
            w = vpLeft - ((imgDim.width - vpDim.width) / 2),
            h = vpTop - ((imgDim.height - vpDim.height) / 2),
            transform = new Transform(w, h, self._currentZoom);

css(self.elements.preview, CSS_TRANSFORM, transform.toString());
    }

function _transferImageToCanvas(customOrientation) {
        var self = this,
            canvas = self.elements.canvas,
            img = self.elements.img,
            ctx = canvas.getContext('2d');

ctx.clearRect(0, 0, canvas.width, canvas.height);
        canvas.width = img.width;
        canvas.height = img.height;

var orientation = self.options.enableOrientation && customOrientation || getExifOrientation(img);
        drawCanvas(canvas, img, orientation);
    }

function _getCanvas(data) {
        var self = this,
            points = data.points,
            left = num(points[0]),
            top = num(points[1]),
            right = num(points[2]),
            bottom = num(points[3]),
            width = right-left,
            height = bottom-top,
            circle = data.circle,
            canvas = document.createElement('canvas'),
            ctx = canvas.getContext('2d'),
            startX = 0,
            startY = 0,
            canvasWidth = data.outputWidth || width,
            canvasHeight = data.outputHeight || height;

canvas.width = canvasWidth;
        canvas.height = canvasHeight;

if (data.backgroundColor) {
            ctx.fillStyle = data.backgroundColor;
            ctx.fillRect(0, 0, canvasWidth, canvasHeight);
        }

// By default assume we're going to draw the entire
        // source image onto the destination canvas.
        var sx = left,
            sy = top,
            sWidth = width,
            sHeight = height,
            dx = 0,
            dy = 0,
            dWidth = canvasWidth,
            dHeight = canvasHeight;

//
        // Do not go outside of the original image's bounds along the x-axis.
        // Handle translations when projecting onto the destination canvas.
        //

// The smallest possible source x-position is 0.
        if (left < 0) {
            sx = 0;
            dx = (Math.abs(left) / width) * canvasWidth;
        }

// The largest possible source width is the original image's width.
        if (sWidth + sx > self._originalImageWidth) {
            sWidth = self._originalImageWidth - sx;
            dWidth =  (sWidth / width) * canvasWidth;
        }

//
        // Do not go outside of the original image's bounds along the y-axis.
        //

// The smallest possible source y-position is 0.
        if (top < 0) {
            sy = 0;
            dy = (Math.abs(top) / height) * canvasHeight;
        }

// The largest possible source height is the original image's height.
        if (sHeight + sy > self._originalImageHeight) {
            sHeight = self._originalImageHeight - sy;
            dHeight = (sHeight / height) * canvasHeight;
        }

// console.table({ left, right, top, bottom, canvasWidth, canvasHeight, width, height, startX, startY, circle, sx, sy, dx, dy, sWidth, sHeight, dWidth, dHeight });

ctx.drawImage(this.elements.preview, sx, sy, sWidth, sHeight, dx, dy, dWidth, dHeight);
        if (circle) {
            ctx.fillStyle = '#fff';
            ctx.globalCompositeOperation = 'destination-in';
            ctx.beginPath();
            ctx.arc(canvas.width / 2, canvas.height / 2, canvas.width / 2, 0, Math.PI * 2, true);
            ctx.closePath();
            ctx.fill();
        }
        return canvas;
    }

function _getHtmlResult(data) {
        var points = data.points,
            div = document.createElement('div'),
            img = document.createElement('img'),
            width = points[2] - points[0],
            height = points[3] - points[1];

addClass(div, 'croppie-result');
        div.appendChild(img);
        css(img, {
            left: (-1 * points[0]) + 'px',
            top: (-1 * points[1]) + 'px'
        });
        img.src = data.url;
        css(div, {
            width: width + 'px',
            height: height + 'px'
        });

return div;
    }

function _getBase64Result(data) {
        return _getCanvas.call(this, data).toDataURL(data.format, data.quality);
    }

function _bind(options, cb) {
        var self = this,
            url,
            points = [],
            zoom = null,
            hasExif = _hasExif.call(self);

if (typeof (options) === 'string') {
            url = options;
            options = {};
        }
        else if (Array.isArray(options)) {
            points = options.slice();
        }
        else if (typeof (options) === 'undefined' && self.data.url) { //refreshing
            _updatePropertiesFromImage.call(self);
            _triggerUpdate.call(self);
            return null;
        }
        else {
            url = options.url;
            points = options.points || [];
            zoom = typeof(options.zoom) === 'undefined' ? null : options.zoom;
        }

self.data.bound = false;
        self.data.url = url || self.data.url;
        self.data.boundZoom = zoom;

return loadImage(url, hasExif).then(function (img) {
            _replaceImage.call(self, img);
            if (!points.length) {
                var natDim = naturalImageDimensions(img);
                var rect = self.elements.viewport.getBoundingClientRect();
                var aspectRatio = rect.width / rect.height;
                var imgAspectRatio = natDim.width / natDim.height;
                var width, height;

if (imgAspectRatio > aspectRatio) {
                    height = natDim.height;
                    width = height * aspectRatio;
                }
                else {
                    width = natDim.width;
                    height = natDim.height / aspectRatio;
                }

var x0 = (natDim.width - width) / 2;
                var y0 = (natDim.height - height) / 2;
                var x1 = x0 + width;
                var y1 = y0 + height;
                self.data.points = [x0, y0, x1, y1];
            }
            else if (self.options.relative) {
                points = [
                    points[0] * img.naturalWidth / 100,
                    points[1] * img.naturalHeight / 100,
                    points[2] * img.naturalWidth / 100,
                    points[3] * img.naturalHeight / 100
                ];
            }

self.data.points = points.map(function (p) {
                return parseFloat(p);
            });
            if (self.options.useCanvas) {
                _transferImageToCanvas.call(self, options.orientation);
            }
            _updatePropertiesFromImage.call(self);
            _triggerUpdate.call(self);
            cb && cb();
        });
    }

function fix(v, decimalPoints) {
        return parseFloat(v).toFixed(decimalPoints || 0);
    }

function _get() {
        var self = this,
            imgData = self.elements.preview.getBoundingClientRect(),
            vpData = self.elements.viewport.getBoundingClientRect(),
            x1 = vpData.left - imgData.left,
            y1 = vpData.top - imgData.top,
            widthDiff = (vpData.width - self.elements.viewport.offsetWidth) / 2, //border
            heightDiff = (vpData.height - self.elements.viewport.offsetHeight) / 2,
            x2 = x1 + self.elements.viewport.offsetWidth + widthDiff,
            y2 = y1 + self.elements.viewport.offsetHeight + heightDiff,
            scale = self._currentZoom;

if (scale === Infinity || isNaN(scale)) {
            scale = 1;
        }

var max = self.options.enforceBoundary ? 0 : Number.NEGATIVE_INFINITY;
        x1 = Math.max(max, x1 / scale);
        y1 = Math.max(max, y1 / scale);
        x2 = Math.max(max, x2 / scale);
        y2 = Math.max(max, y2 / scale);

return {
            points: [fix(x1), fix(y1), fix(x2), fix(y2)],
            zoom: scale,
            orientation: self.data.orientation
        };
    }

var RESULT_DEFAULTS = {
            type: 'canvas',
            format: 'png',
            quality: 1
        },
        RESULT_FORMATS = ['jpeg', 'webp', 'png'];

function _result(options) {
        var self = this,
            data = _get.call(self),
            opts = deepExtend(clone(RESULT_DEFAULTS), clone(options)),
            resultType = (typeof (options) === 'string' ? options : (opts.type || 'base64')),
            size = opts.size || 'viewport',
            format = opts.format,
            quality = opts.quality,
            backgroundColor = opts.backgroundColor,
            circle = typeof opts.circle === 'boolean' ? opts.circle : (self.options.viewport.type === 'circle'),
            vpRect = self.elements.viewport.getBoundingClientRect(),
            ratio = vpRect.width / vpRect.height,
            prom;

if (size === 'viewport') {
            data.outputWidth = vpRect.width;
            data.outputHeight = vpRect.height;
        } else if (typeof size === 'object') {
            if (size.width && size.height) {
                data.outputWidth = size.width;
                data.outputHeight = size.height;
            } else if (size.width) {
                data.outputWidth = size.width;
                data.outputHeight = size.width / ratio;
            } else if (size.height) {
                data.outputWidth = size.height * ratio;
                data.outputHeight = size.height;
            }
        }

if (RESULT_FORMATS.indexOf(format) > -1) {
            data.format = 'image/' + format;
            data.quality = quality;
        }

data.circle = circle;
        data.url = self.data.url;
        data.backgroundColor = backgroundColor;

prom = new Promise(function (resolve) {
            switch(resultType.toLowerCase())
            {
                case 'rawcanvas':
                    resolve(_getCanvas.call(self, data));
                    break;
                case 'canvas':
                case 'base64':
                    resolve(_getBase64Result.call(self, data));
                    break;
                case 'blob':
                    _getBlobResult.call(self, data).then(resolve);
                    break;
                default:
                    resolve(_getHtmlResult.call(self, data));
                    break;
            }
        });
        return prom;
    }

function _refresh() {
        _updatePropertiesFromImage.call(this);
    }

function _rotate(deg) {
        if (!this.options.useCanvas || !this.options.enableOrientation) {
            throw 'Croppie: Cannot rotate without enableOrientation && EXIF.js included';
        }

var self = this,
            canvas = self.elements.canvas;

self.data.orientation = getExifOffset(self.data.orientation, deg);
        drawCanvas(canvas, self.elements.img, self.data.orientation);
        _updateCenterPoint.call(self, true);
        _updateZoomLimits.call(self);
    }

function _destroy() {
        var self = this;
        self.element.removeChild(self.elements.boundary);
        removeClass(self.element, 'croppie-container');
        if (self.options.enableZoom) {
            self.element.removeChild(self.elements.zoomerWrap);
        }
        delete self.elements;
    }

if (window.jQuery) {
        var $ = window.jQuery;
        $.fn.croppie = function (opts) {
            var ot = typeof opts;

if (ot === 'string') {
                var args = Array.prototype.slice.call(arguments, 1);
                var singleInst = $(this).data('croppie');

if (opts === 'get') {
                    return singleInst.get();
                }
                else if (opts === 'result') {
                    return singleInst.result.apply(singleInst, args);
                }
                else if (opts === 'bind') {
                    return singleInst.bind.apply(singleInst, args);
                }

return this.each(function () {
                    var i = $(this).data('croppie');
                    if (!i) return;

function Croppie(element, opts) {
        if (element.className.indexOf('croppie-container') > -1) {
            throw new Error("Croppie: Can't initialize croppie more than once");
        }
        this.element = element;
        this.options = deepExtend(clone(Croppie.defaults), opts);

if (this.element.tagName.toLowerCase() === 'img') {
            var origImage = this.element;
            addClass(origImage, 'cr-original-image');
            setAttributes(origImage, {'aria-hidden' : 'true', 'alt' : '' });
            var replacementDiv = document.createElement('div');
            this.element.parentNode.appendChild(replacementDiv);
            replacementDiv.appendChild(origImage);
            this.element = replacementDiv;
            this.options.url = this.options.url || origImage.src;
        }

_create.call(this);
        if (this.options.url) {
            var bindOpts = {
                url: this.options.url,
                points: this.options.points
            };
            delete this.options['url'];
            delete this.options['points'];
            _bind.call(this, bindOpts);
        }
    }

Croppie.defaults = {
        viewport: {
            width: 100,
            height: 100,
            type: 'square'
        },
        boundary: { },
        orientationControls: {
            enabled: true,
            leftClass: '',
            rightClass: ''
        },
        resizeControls: {
            width: true,
            height: true
        },
        customClass: '',
        showZoomer: true,
        enableZoom: true,
        enableResize: false,
        mouseWheelZoom: true,
        enableExif: false,
        enforceBoundary: true,
        enableOrientation: false,
        enableKeyMovement: true,
        update: function () { }
    };

Croppie.globals = {
        translate: 'translate3d'
    };

deepExtend(Croppie.prototype, {
        bind: function (options, cb) {
            return _bind.call(this, options, cb);
        },
        get: function () {
            var data = _get.call(this);
            var points = data.points;
            if (this.options.relative) {
                points[0] /= this.elements.img.naturalWidth / 100;
                points[1] /= this.elements.img.naturalHeight / 100;
                points[2] /= this.elements.img.naturalWidth / 100;
                points[3] /= this.elements.img.naturalHeight / 100;
            }
            return data;
        },
        result: function (type) {
            return _result.call(this, type);
        },
        refresh: function () {
            return _refresh.call(this);
        },
        setZoom: function (v) {
            _setZoomerVal.call(this, v);
            dispatchChange(this.elements.zoomer);
        },
        rotate: function (deg) {
            _rotate.call(this, deg);
        },
        destroy: function () {
            return _destroy.call(this);
        }
    });
    return Croppie;
}));

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