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{NgModule,Directive,ElementRef,HostListener,Input,Output, EventEmitter,Optional, AfterViewInit, OnInit, OnDestroy, ChangeDetectorRef} from '@angular/core';\nimport {NgModel, NgControl} from '@angular/forms';\nimport {CommonModule} from '@angular/common';\nimport { Subscription } from 'rxjs';\n\n@Directive({\n    selector: '[pInputTextarea]',\n    host: {\n        '[class.p-inputtextarea]': 'true',\n        '[class.p-inputtext]': 'true',\n        '[class.p-component]': 'true',\n        '[class.p-filled]': 'filled',\n        '[class.p-inputtextarea-resizable]': 'autoResize'\n    }\n})\nexport class InputTextarea implements OnInit, AfterViewInit, OnDestroy  {\n    \n    @Input() autoResize: boolean;\n    \n    @Output() onResize: EventEmitter<any> = new EventEmitter();\n        \n    filled: boolean;\n\n    cachedScrollHeight:number;\n\n    ngModelSubscription: Subscription;\n\n    ngControlSubscription: Subscription;\n\n    constructor(public el: ElementRef, @Optional() public ngModel: NgModel, @Optional() public control : NgControl, private cd: ChangeDetectorRef) {}\n        \n    ngOnInit() {\n        if (this.ngModel) {\n            this.ngModelSubscription = this.ngModel.valueChanges.subscribe(() =>{\n                this.updateState();\n            })\n        }\n\n        if (this.control) {\n            this.ngControlSubscription = this.control.valueChanges.subscribe(() => {\n                this.updateState();\n            });\n        }\n    }\n\n    ngAfterViewInit() {\n        if (this.autoResize)\n            this.resize();\n\n        this.updateFilledState();\n        this.cd.detectChanges();\n    }\n\n    @HostListener('input', ['$event'])\n    onInput(e) {\n        this.updateState();\n    }\n    \n    updateFilledState() {\n        this.filled = (this.el.nativeElement.value && this.el.nativeElement.value.length) || (this.ngModel && this.ngModel.model);\n    }\n    \n    @HostListener('focus', ['$event'])\n    onFocus(e) {\n        if (this.autoResize) {\n            this.resize(e);\n        }\n    }\n    \n    @HostListener('blur', ['$event'])\n    onBlur(e) {\n        if (this.autoResize) {\n            this.resize(e);\n        }\n    }\n    \n    resize(event?: Event) {\n        this.el.nativeElement.style.height = 'auto';\n        this.el.nativeElement.style.height = this.el.nativeElement.scrollHeight + 'px';\n\n        if (parseFloat(this.el.nativeElement.style.height) >= parseFloat(this.el.nativeElement.style.maxHeight)) {\n            this.el.nativeElement.style.overflowY = \"scroll\";\n            this.el.nativeElement.style.height = this.el.nativeElement.style.maxHeight;\n        }\n        else {\n            this.el.nativeElement.style.overflow = \"hidden\";\n        }\n\n        this.onResize.emit(event||{});\n    }\n\n    updateState() {\n        this.updateFilledState();\n            \n        if (this.autoResize) {\n            this.resize();\n        }\n    }\n\n    ngOnDestroy() {\n        if (this.ngModelSubscription) {\n            this.ngModelSubscription.unsubscribe();\n        }\n\n        if (this.ngControlSubscription) {\n            this.ngControlSubscription.unsubscribe();\n        }\n    }\n}\n\n@NgModule({\n    imports: [CommonModule],\n    exports: [InputTextarea],\n    declarations: [InputTextarea]\n})\nexport class InputTextareaModule { }\n"]}