{"version":3,"file":"primeng-scrolltop.js","sources":["../../src/app/components/scrolltop/scrolltop.ts","../../src/app/components/scrolltop/primeng-scrolltop.ts"],"sourcesContent":["import { NgModule, Component, ChangeDetectionStrategy, ViewEncapsulation, Input, OnInit, OnDestroy, ElementRef, ChangeDetectorRef} from '@angular/core';\nimport { CommonModule } from '@angular/common';\nimport { animate, state, style, transition, trigger } from '@angular/animations';\nimport { DomHandler } from 'primeng/dom';\n\n@Component({\n    selector: 'p-scrollTop',\n    template: `\n        <button  *ngIf=\"visible\" [@animation]=\"{value: 'open', params: {showTransitionParams: showTransitionOptions, hideTransitionParams: hideTransitionOptions}}\" (@animation.start)=\"onEnter()\"\n            [ngClass]=\"containerClass()\" (click)=\"onClick()\" [class]=\"styleClass\" [ngStyle]=\"style\" type=\"button\">\n            <span [class]=\"icon\" [ngClass]=\"'p-scrolltop-icon'\"></span>\n        </button>\n    `,\n    changeDetection: ChangeDetectionStrategy.OnPush,\n    encapsulation: ViewEncapsulation.None,\n    styleUrls: ['./scrolltop.css'],\n    animations: [\n        trigger('animation', [\n            state('void', style({\n                opacity: 0\n            })),\n            state('open', style({\n                opacity: 1\n            })),\n            transition('void => open', animate('{{showTransitionParams}}')),\n            transition('open => void', animate('{{hideTransitionParams}}')),\n        ])\n    ]\n})\nexport class ScrollTop implements OnInit, OnDestroy {\n\n    @Input() styleClass: string;\n\n    @Input() style: any;\n\n    @Input() target: string = \"window\";\n    \n    @Input() threshold: number = 400;\n\n    @Input() icon: string = \"pi pi-chevron-up\";\n\n    @Input() behavior: string = \"smooth\";\n    \n    @Input() showTransitionOptions: string = '.15s';\n\n    @Input() hideTransitionOptions: string = '.15s';\n\n    scrollListener: any;\n    \n    visible: boolean = false;\n\n    constructor(public el: ElementRef, private cd: ChangeDetectorRef) { }\n\n    ngOnInit() {\n        if (this.target === 'window')\n            this.bindDocumentScrollListener();\n        else if (this.target === 'parent')\n            this.bindParentScrollListener();\n    }\n\n    onClick() {\n        let scrollElement = this.target === 'window' ? window : this.el.nativeElement.parentElement;\n         scrollElement.scroll({\n            top: 0, \n            behavior: this.behavior\n        });\n    }\n\n    onEnter() {\n        this.el.nativeElement.children[0].style.zIndex = DomHandler.generateZIndex();\n    }\n\n    checkVisibility(scrollY) {\n        if (scrollY > this.threshold)\n            this.visible = true;\n        else\n            this.visible = false;\n\n        this.cd.markForCheck();\n    }\n\n    bindParentScrollListener() {\n        this.scrollListener = () => {\n\n            this.checkVisibility(this.el.nativeElement.parentElement.scrollTop);\n        };\n        \n        this.el.nativeElement.parentElement.addEventListener('scroll', this.scrollListener);\n    }\n\n    bindDocumentScrollListener() {\n        this.scrollListener = () => {\n            this.checkVisibility(DomHandler.getWindowScrollTop());\n        };\n        \n        window.addEventListener('scroll', this.scrollListener);\n    }\n\n    unbindParentScrollListener() {\n        if (this.scrollListener) {\n            this.el.nativeElement.parentElement.removeEventListener('scroll', this.scrollListener);\n            this.scrollListener = null;\n        }\n    }\n\n    unbindDocumentScrollListener() {\n        if (this.scrollListener) {\n            window.removeEventListener('scroll', this.scrollListener);\n            this.scrollListener = null;\n        }\n    }\n\n    containerClass() {\n        return {\n            'p-scrolltop p-link p-component': true,\n            'p-scrolltop-sticky': this.target !== 'window'\n        };\n    }\n\n    ngOnDestroy() {\n        if (this.target === 'window')\n            this.unbindDocumentScrollListener();\n        else if (this.target === 'parent')\n            this.unbindParentScrollListener();\n    }\n}\n\n@NgModule({\n    imports: [CommonModule],\n    exports: [ScrollTop],\n    declarations: [ScrollTop]\n})\nexport class ScrollTopModule { }\n","/**\n * Generated bundle index. 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