ngx-pinch-zoom
Version:
Pinch zoom component for Angular2.
484 lines • 50.2 kB
JavaScript
import { Component, HostBinding, ElementRef, HostListener, ViewChild, Input, EventEmitter, Output, NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
/**
* @fileoverview added by tsickle
* @suppress {checkTypes} checked by tsc
*/
var PinchZoomComponent = /** @class */ (function () {
function PinchZoomComponent(elementRef) {
this.elementRef = elementRef;
this.i = 0;
this.scale = 1;
this.initialScale = 1;
this.moveX = 0;
this.moveY = 0;
this.initialMoveX = 0;
this.initialMoveY = 0;
this.draggingMode = false;
this.lastTap = 0;
this.transitionDuration = 200;
this.autoZoomOut = false;
this.events = new EventEmitter();
}
Object.defineProperty(PinchZoomComponent.prototype, "id", {
get: /**
* @return {?}
*/
function () {
return this._id;
},
set: /**
* @param {?} value
* @return {?}
*/
function (value) {
this._id = value;
},
enumerable: true,
configurable: true
});
Object.defineProperty(PinchZoomComponent.prototype, "isMobile", {
get: /**
* @return {?}
*/
function () {
var /** @type {?} */ check = false;
(function (a) { if (/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino/i.test(a) || /1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(a.substr(0, 4)))
check = true; })(navigator.userAgent || navigator.vendor);
return check;
},
enumerable: true,
configurable: true
});
Object.defineProperty(PinchZoomComponent.prototype, "isDragging", {
get: /**
* @return {?}
*/
function () {
var /** @type {?} */ imgHeight = this.getImageHeight();
var /** @type {?} */ imgWidth = this.getImageWidth();
if (this.scale > 1) {
return imgHeight * this.scale > this.parentElement.offsetHeight || imgWidth * this.scale > this.parentElement.offsetWidth;
}
if (this.scale === 1) {
return imgHeight > this.parentElement.offsetHeight || imgWidth > this.parentElement.offsetWidth;
}
},
enumerable: true,
configurable: true
});
/**
* @return {?}
*/
PinchZoomComponent.prototype.ngOnInit = /**
* @return {?}
*/
function () {
this.element = this.contentElement.nativeElement;
this.parentElement = this.elementRef.nativeElement;
this.setBasicStyles();
};
/*
* Mobile listeners
*/
/**
* @param {?} event
* @return {?}
*/
PinchZoomComponent.prototype.onResize = /**
* @param {?} event
* @return {?}
*/
function (event) {
this.setImageWidth();
this.transformElement(this.transitionDuration);
};
/**
* @param {?} event
* @return {?}
*/
PinchZoomComponent.prototype.touchstartHandler = /**
* @param {?} event
* @return {?}
*/
function (event) {
this.getElementPosition();
if (!this.eventType) {
this.startX = event.touches[0].clientX - this.elementPosition.left;
this.startY = event.touches[0].clientY - this.elementPosition.top;
this.startClientX = event.touches[0].clientX - this.elementPosition.left;
this.startClientY = event.touches[0].clientY - this.elementPosition.top;
}
this.events.emit({ type: 'touchstart' });
};
/**
* @param {?} event
* @return {?}
*/
PinchZoomComponent.prototype.touchmoveHandler = /**
* @param {?} event
* @return {?}
*/
function (event) {
var /** @type {?} */ touches = event.touches;
// Swipe
if (this.detectSwipe(touches) || this.eventType == 'swipe') {
this.handleSwipe(event);
}
// Pinch
if (touches.length === 2 && !this.eventType || this.eventType == 'pinch') {
this.handlePinch(event);
}
};
/**
* @param {?} event
* @return {?}
*/
PinchZoomComponent.prototype.touchendHandler = /**
* @param {?} event
* @return {?}
*/
function (event) {
this.i = 0;
this.draggingMode = false;
var /** @type {?} */ touches = event.touches;
if (this.scale < 1) {
this.scale = 1;
}
// Auto Zoom Out
if (this.autoZoomOut && this.eventType === 'pinch') {
this.scale = 1;
}
this.events.emit({ type: 'touchend' });
if (this.eventType === 'pinch' || this.eventType === 'swipe') {
this.alignImage();
}
if (this.eventType === 'pinch' ||
this.eventType === 'swipe' ||
this.eventType === 'horizontal-swipe' ||
this.eventType === 'vertical-swipe') {
this.updateInitialValues();
}
this.eventType = 'touchend';
if (touches && touches.length == 0) {
this.eventType = '';
}
};
/*
* Handlers
*/
/**
* @param {?} event
* @return {?}
*/
PinchZoomComponent.prototype.handleSwipe = /**
* @param {?} event
* @return {?}
*/
function (event) {
event.preventDefault();
if (!this.eventType) {
this.startX = event.touches[0].clientX - this.elementPosition.left;
this.startY = event.touches[0].clientY - this.elementPosition.top;
}
this.eventType = 'swipe';
this.events.emit({
type: 'swipe',
moveX: this.moveX,
moveY: this.moveY
});
this.moveX = this.initialMoveX + ((event.touches[0].clientX - this.elementPosition.left) - this.startX);
this.moveY = this.initialMoveY + ((event.touches[0].clientY - this.elementPosition.top) - this.startY);
this.transformElement(0);
};
/**
* @param {?} event
* @return {?}
*/
PinchZoomComponent.prototype.handlePinch = /**
* @param {?} event
* @return {?}
*/
function (event) {
event.preventDefault();
var /** @type {?} */ touches = event.touches;
if (!this.eventType) {
this.initialDistance = this.getDistance(touches);
this.moveXC = (((event.touches[0].clientX - this.elementPosition.left) + (event.touches[1].clientX - this.elementPosition.left)) / 2) - this.initialMoveX;
this.moveYC = (((event.touches[0].clientY - this.elementPosition.top) + (event.touches[1].clientY - this.elementPosition.top)) / 2) - this.initialMoveY;
}
this.eventType = 'pinch';
this.events.emit({ type: 'pinch' });
this.distance = this.getDistance(touches);
this.scale = this.initialScale * (this.distance / this.initialDistance);
this.moveX = this.initialMoveX - (((this.distance / this.initialDistance) * this.moveXC) - this.moveXC);
this.moveY = this.initialMoveY - (((this.distance / this.initialDistance) * this.moveYC) - this.moveYC);
this.transformElement(0);
};
/**
* @param {?} touches
* @return {?}
*/
PinchZoomComponent.prototype.detectSwipe = /**
* @param {?} touches
* @return {?}
*/
function (touches) {
return touches.length === 1 && this.scale > 1 && !this.eventType;
};
/**
* @param {?} touches
* @return {?}
*/
PinchZoomComponent.prototype.getDistance = /**
* @param {?} touches
* @return {?}
*/
function (touches) {
return Math.sqrt(Math.pow(touches[0].pageX - touches[1].pageX, 2) + Math.pow(touches[0].pageY - touches[1].pageY, 2));
};
/**
* @return {?}
*/
PinchZoomComponent.prototype.getImageHeight = /**
* @return {?}
*/
function () {
return this.element.getElementsByTagName("img")[0].offsetHeight;
};
/**
* @return {?}
*/
PinchZoomComponent.prototype.getImageWidth = /**
* @return {?}
*/
function () {
return this.element.getElementsByTagName("img")[0].offsetWidth;
};
/**
* @return {?}
*/
PinchZoomComponent.prototype.setBasicStyles = /**
* @return {?}
*/
function () {
this.element.style.display = "flex";
this.element.style.height = "100%";
this.element.style.alignItems = "center";
this.element.style.justifyContent = "center";
this.element.style.transformOrigin = '0 0';
this.hostDisplay = "block";
this.hostOverflow = "hidden";
this.hostHeight = this.containerHeight;
this.setImageWidth();
};
/**
* @return {?}
*/
PinchZoomComponent.prototype.setImageWidth = /**
* @return {?}
*/
function () {
var /** @type {?} */ imgElement = this.element.getElementsByTagName("img");
if (imgElement.length) {
imgElement[0].style.maxWidth = '100%';
imgElement[0].style.maxHeight = '100%';
}
};
/**
* @param {?=} duration
* @return {?}
*/
PinchZoomComponent.prototype.transformElement = /**
* @param {?=} duration
* @return {?}
*/
function (duration) {
if (duration === void 0) { duration = 50; }
this.element.style.transition = 'all ' + duration + 'ms';
this.element.style.transform = 'matrix(' + Number(this.scale) + ',' + 0 + ',' + 0 + ',' + Number(this.scale) + ',' + Number(this.moveX) + ',' + Number(this.moveY) + ')';
};
/**
* @return {?}
*/
PinchZoomComponent.prototype.resetScale = /**
* @return {?}
*/
function () {
this.scale = 1;
this.moveX = 0;
this.moveY = 0;
this.updateInitialValues();
this.transformElement(this.transitionDuration);
};
/**
* @return {?}
*/
PinchZoomComponent.prototype.updateInitialValues = /**
* @return {?}
*/
function () {
this.initialScale = this.scale;
this.initialMoveX = this.moveX;
this.initialMoveY = this.moveY;
};
/**
* @return {?}
*/
PinchZoomComponent.prototype.centeringImage = /**
* @return {?}
*/
function () {
var /** @type {?} */ img = this.element.getElementsByTagName("img")[0];
var /** @type {?} */ initialMoveX = this.moveX;
var /** @type {?} */ initialMoveY = this.moveY;
if (this.moveY > 0) {
this.moveY = 0;
}
if (this.moveX > 0) {
this.moveX = 0;
}
if (img) {
this.transitionYRestriction();
this.transitionXRestriction();
}
if (img && this.scale < 1) {
if (this.moveX < this.element.offsetWidth * (1 - this.scale)) {
this.moveX = this.element.offsetWidth * (1 - this.scale);
}
}
return initialMoveX != this.moveX || initialMoveY != this.moveY;
};
/**
* @return {?}
*/
PinchZoomComponent.prototype.alignImage = /**
* @return {?}
*/
function () {
var /** @type {?} */ isMoveChanged = this.centeringImage();
if (isMoveChanged) {
this.updateInitialValues();
this.transformElement(this.transitionDuration);
}
};
/**
* @return {?}
*/
PinchZoomComponent.prototype.transitionYRestriction = /**
* @return {?}
*/
function () {
var /** @type {?} */ imgHeight = this.getImageHeight();
if (imgHeight * this.scale < this.parentElement.offsetHeight) {
this.moveY = (this.parentElement.offsetHeight - this.element.offsetHeight * this.scale) / 2;
}
else {
var /** @type {?} */ imgOffsetTop = ((imgHeight - this.element.offsetHeight) * this.scale) / 2;
if (this.moveY > imgOffsetTop) {
this.moveY = imgOffsetTop;
}
else if ((imgHeight * this.scale + Math.abs(imgOffsetTop) - this.parentElement.offsetHeight) + this.moveY < 0) {
this.moveY = -(imgHeight * this.scale + Math.abs(imgOffsetTop) - this.parentElement.offsetHeight);
}
}
};
/**
* @return {?}
*/
PinchZoomComponent.prototype.transitionXRestriction = /**
* @return {?}
*/
function () {
var /** @type {?} */ imgWidth = this.getImageWidth();
if (imgWidth * this.scale < this.parentElement.offsetWidth) {
this.moveX = (this.parentElement.offsetWidth - this.element.offsetWidth * this.scale) / 2;
}
else {
var /** @type {?} */ imgOffsetLeft = ((imgWidth - this.element.offsetWidth) * this.scale) / 2;
if (this.moveX > imgOffsetLeft) {
this.moveX = imgOffsetLeft;
}
else if ((imgWidth * this.scale + Math.abs(imgOffsetLeft) - this.parentElement.offsetWidth) + this.moveX < 0) {
this.moveX = -(imgWidth * this.scale + Math.abs(imgOffsetLeft) - this.parentElement.offsetWidth);
}
}
};
/**
* @return {?}
*/
PinchZoomComponent.prototype.getElementPosition = /**
* @return {?}
*/
function () {
this.elementPosition = this.elementRef.nativeElement.getBoundingClientRect();
};
PinchZoomComponent.decorators = [
{ type: Component, args: [{
selector: 'pinch-zoom, [pinch-zoom]',
template: "<div #content>\n\t<ng-content></ng-content>\n</div>",
styles: [":host{position:relative}"]
},] },
];
/** @nocollapse */
PinchZoomComponent.ctorParameters = function () { return [
{ type: ElementRef }
]; };
PinchZoomComponent.propDecorators = {
containerHeight: [{ type: Input, args: ['height',] }],
transitionDuration: [{ type: Input, args: ['transition-duration',] }],
autoZoomOut: [{ type: Input, args: ['auto-zoom-out',] }],
id: [{ type: Input, args: ['id',] }],
events: [{ type: Output }],
hostDisplay: [{ type: HostBinding, args: ['style.display',] }],
hostOverflow: [{ type: HostBinding, args: ['style.overflow',] }],
hostHeight: [{ type: HostBinding, args: ['style.height',] }],
contentElement: [{ type: ViewChild, args: ['content',] }],
onResize: [{ type: HostListener, args: ['window:resize', ['$event'],] }],
touchstartHandler: [{ type: HostListener, args: ['touchstart', ['$event'],] }],
touchmoveHandler: [{ type: HostListener, args: ['touchmove', ['$event'],] }],
touchendHandler: [{ type: HostListener, args: ['touchend', ['$event'],] }]
};
return PinchZoomComponent;
}());
/**
* @fileoverview added by tsickle
* @suppress {checkTypes} checked by tsc
*/
var PinchZoomModule = /** @class */ (function () {
function PinchZoomModule() {
}
PinchZoomModule.decorators = [
{ type: NgModule, args: [{
declarations: [
PinchZoomComponent
],
imports: [
CommonModule
],
exports: [
PinchZoomComponent
],
entryComponents: [
PinchZoomComponent
]
},] },
];
return PinchZoomModule;
}());
/**
* @fileoverview added by tsickle
* @suppress {checkTypes} checked by tsc
*/
/**
* @fileoverview added by tsickle
* @suppress {checkTypes} checked by tsc
*/
export { PinchZoomComponent, PinchZoomModule };
//# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"file":"ngx-pinch-zoom.js.map","sources":["ng://ngx-pinch-zoom/lib/pinch-zoom.component.ts","ng://ngx-pinch-zoom/lib/pinch-zoom.module.ts"],"sourcesContent":["import { Component, HostBinding, ElementRef, HostListener, OnInit, ViewChild, Input, EventEmitter, Output } from '@angular/core';\n\n@Component({\n    selector: 'pinch-zoom, [pinch-zoom]',\n    template: `<div #content>\n\t<ng-content></ng-content>\n</div>`,\n    styles: [`:host{position:relative}`]\n})\n\nexport class PinchZoomComponent {\n\n    i: number = 0;\n    _id: any;\n    element: any;\n    elementPosition: any;\n    parentElement: any;\n    eventType: any;\n\n    scale: number = 1;\n    initialScale: number = 1;\n\n    startX: number;\n    startY: number;\n    startClientX: number;\n    startClientY: number;\n\n    moveX: any = 0;\n    moveY: any = 0;\n    initialMoveX: any = 0;\n    initialMoveY: any = 0;\n    moveXC: number;\n    moveYC: number;\n\n    distance: number;\n    initialDistance: number;\n    draggingMode: boolean = false;\n    doubleTapTimeout: any;\n    lastTap: number = 0;\n\n    @Input('height') containerHeight: string;\n    @Input('transition-duration') transitionDuration: number = 200;\n    @Input('auto-zoom-out') autoZoomOut: boolean = false;\n    @Input('id') set id(value: any) {\n        this._id = value;\n    }\n    get id(){\n        return this._id;\n    }\n    \n    @Output() events: EventEmitter<any> = new EventEmitter<any>();\n\n    @HostBinding('style.display') hostDisplay:string;\n    @HostBinding('style.overflow') hostOverflow:string;\n    @HostBinding('style.height') hostHeight:string;\n\n    @ViewChild('content') contentElement: ElementRef;\n\n    get isMobile() {\n        var check = false;\n        (function(a){if(/(android|bb\\d+|meego).+mobile|avantgo|bada\\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\\.(browser|link)|vodafone|wap|windows ce|xda|xiino/i.test(a)||/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\\-(n|u)|c55\\/|capi|ccwa|cdm\\-|cell|chtm|cldc|cmd\\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\\-s|devi|dica|dmob|do(c|p)o|ds(12|\\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\\-|_)|g1 u|g560|gene|gf\\-5|g\\-mo|go(\\.w|od)|gr(ad|un)|haie|hcit|hd\\-(m|p|t)|hei\\-|hi(pt|ta)|hp( i|ip)|hs\\-c|ht(c(\\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\\-(20|go|ma)|i230|iac( |\\-|\\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\\/)|klon|kpt |kwc\\-|kyo(c|k)|le(no|xi)|lg( g|\\/(k|l|u)|50|54|\\-[a-w])|libw|lynx|m1\\-w|m3ga|m50\\/|ma(te|ui|xo)|mc(01|21|ca)|m\\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\\-2|po(ck|rt|se)|prox|psio|pt\\-g|qa\\-a|qc(07|12|21|32|60|\\-[2-7]|i\\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\\-|oo|p\\-)|sdk\\/|se(c(\\-|0|1)|47|mc|nd|ri)|sgh\\-|shar|sie(\\-|m)|sk\\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\\-|v\\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\\-|tdg\\-|tel(i|m)|tim\\-|t\\-mo|to(pl|sh)|ts(70|m\\-|m3|m5)|tx\\-9|up(\\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\\-|your|zeto|zte\\-/i.test(a.substr(0,4))) check = 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imgOffsetTop){\n                this.moveY = imgOffsetTop;\n            } else if ((imgHeight * this.scale + Math.abs(imgOffsetTop) - this.parentElement.offsetHeight) + this.moveY < 0){\n                this.moveY = - (imgHeight * this.scale + Math.abs(imgOffsetTop) - this.parentElement.offsetHeight);\n            }\n        }\n    }\n\n    transitionXRestriction():void {\n        let imgWidth = this.getImageWidth();\n\n        if (imgWidth * this.scale < this.parentElement.offsetWidth) {\n            this.moveX = (this.parentElement.offsetWidth - this.element.offsetWidth * this.scale) / 2;\n        } else {\n            let imgOffsetLeft = ((imgWidth - this.element.offsetWidth) * this.scale) / 2;\n\n            if (this.moveX > imgOffsetLeft){\n                this.moveX = imgOffsetLeft;\n            } else if ((imgWidth * this.scale + Math.abs(imgOffsetLeft) - this.parentElement.offsetWidth) + this.moveX < 0){\n                this.moveX = - (imgWidth * this.scale + 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