primeng/fesm2015/primeng-scroller.mjs.map

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{"version":3,"file":"primeng-scroller.mjs","sources":["../../src/app/components/scroller/scroller.ts","../../src/app/components/scroller/primeng-scroller.ts"],"sourcesContent":["import { NgModule, Component, Input, ElementRef, ViewChild, ChangeDetectionStrategy, ViewEncapsulation, ChangeDetectorRef, AfterContentInit, ContentChildren, QueryList, TemplateRef, Output, EventEmitter, SimpleChanges, OnInit, AfterViewChecked, OnDestroy, NgZone } from '@angular/core';\nimport { CommonModule } from '@angular/common';\nimport { DomHandler } from 'primeng/dom';\nimport { PrimeTemplate } from 'primeng/api';\n\nexport type ScrollerToType = 'to-start' | 'to-end' | undefined;\n\nexport type ScrollerOrientationType = 'vertical' | 'horizontal' | 'both';\n\nexport interface ScrollerOptions {\n    id?: string | undefined;\n    style?: any;\n    styleClass?: string | undefined;\n    tabindex?: number | undefined;\n    items?: any[];\n    itemSize?: any;\n    scrollHeight?: string | undefined;\n    scrollWidth?: string | undefined;\n    orientation?: ScrollerOrientationType;\n    delay?: number | undefined;\n    lazy?: boolean;\n    disabled?: boolean;\n    loaderDisabled?: boolean;\n    columns?: any[] | undefined;\n    showSpacer?: boolean;\n    showLoader?: boolean;\n    numToleratedItems?: any;\n    loading?: boolean;\n    autoSize?: boolean;\n    trackBy?: any;\n    onLazyLoad?: Function | undefined;\n    onScroll?: Function | undefined;\n    onScrollIndexChange?: Function | undefined;\n}\n\n@Component({\n    selector: 'p-scroller',\n    template: `\n        <ng-container *ngIf=\"!_disabled; else disabledContainer\">\n            <div #element [attr.id]=\"_id\" [attr.tabindex]=\"tabindex\" [ngStyle]=\"_style\" [class]=\"_styleClass\"\n                [ngClass]=\"{'p-scroller': true, 'p-both-scroll': both, 'p-horizontal-scroll': horizontal}\"\n                (scroll)=\"onContainerScroll($event)\">\n                <ng-container *ngIf=\"contentTemplate; else buildInContent\">\n                    <ng-container *ngTemplateOutlet=\"contentTemplate; context: {$implicit: loadedItems, options: getContentOptions()}\"></ng-container>\n                </ng-container>\n                <ng-template #buildInContent>\n                    <div #content class=\"p-scroller-content\" [ngClass]=\"{'p-scroller-loading': d_loading}\" [ngStyle]=\"contentStyle\">\n                        <ng-container *ngFor=\"let item of loadedItems; let index = index; trackBy: _trackBy || index\">\n                            <ng-container *ngTemplateOutlet=\"itemTemplate; context: {$implicit: item, options: getOptions(index)}\"></ng-container>\n                        </ng-container>\n                    </div>\n                </ng-template>\n                <div *ngIf=\"_showSpacer\" class=\"p-scroller-spacer\" [ngStyle]=\"spacerStyle\"></div>\n                <div *ngIf=\"!loaderDisabled && _showLoader && d_loading\" class=\"p-scroller-loader\" [ngClass]=\"{'p-component-overlay': !loaderTemplate}\">\n                    <ng-container *ngIf=\"loaderTemplate; else buildInLoader\">\n                        <ng-container *ngFor=\"let item of loaderArr; let index = index\">\n                            <ng-container *ngTemplateOutlet=\"loaderTemplate; context: {options: getLoaderOptions(index, both && { numCols: _numItemsInViewport.cols })}\"></ng-container>\n                        </ng-container>\n                    </ng-container>\n                    <ng-template #buildInLoader>\n                        <ng-container *ngIf=\"loaderIconTemplate; else buildInLoaderIcon\">\n                            <ng-container *ngTemplateOutlet=\"loaderIconTemplate; context: {options: { styleClass: 'p-scroller-loading-icon' }}\"></ng-container>\n                        </ng-container>\n                        <ng-template #buildInLoaderIcon>\n                            <i class=\"p-scroller-loading-icon pi pi-spinner pi-spin\"></i>\n                        </ng-template>\n                    </ng-template>\n                </div>\n            </div>\n        </ng-container>\n        <ng-template #disabledContainer>\n            <ng-content></ng-content>\n            <ng-container *ngIf=\"contentTemplate\">\n                <ng-container *ngTemplateOutlet=\"contentTemplate; context: {$implicit: items, options: {rows: _items, columns: loadedColumns}}\"></ng-container>\n            </ng-container>\n        </ng-template>\n    `,\n    changeDetection: ChangeDetectionStrategy.Default,\n    encapsulation: ViewEncapsulation.None,\n    styleUrls: ['./scroller.css'],\n    host: {\n        'class': 'p-scroller-viewport p-element'\n    }\n})\nexport class Scroller implements OnInit, AfterContentInit, AfterViewChecked, OnDestroy {\n\n    @Input() get id() { return this._id; }\n    set id(val: string) { this._id = val; }\n\n    @Input() get style() { return this._style; }\n    set style(val: any) { this._style = val; }\n\n    @Input() get styleClass() { return this._styleClass; }\n    set styleClass(val: string) { this._styleClass = val; }\n\n    @Input() get tabindex() { return this._tabindex; }\n    set tabindex(val: number) { this._tabindex = val; }\n\n    @Input() get items() { return this._items; }\n    set items(val: any[]) { this._items = val; }\n\n    @Input() get itemSize() { return this._itemSize; }\n    set itemSize(val: any) { this._itemSize = val; }\n\n    @Input() get scrollHeight() { return this._scrollHeight; }\n    set scrollHeight(val: string) { this._scrollHeight = val; }\n\n    @Input() get scrollWidth() { return this._scrollWidth; }\n    set scrollWidth(val: string) { this._scrollWidth = val; }\n\n    @Input() get orientation() { return this._orientation; }\n    set orientation(val: string) { this._orientation = val; }\n\n    @Input() get delay() { return this._delay; }\n    set delay(val: number) { this._delay = val; }\n\n    @Input() get resizeDelay() { return this._resizeDelay; }\n    set resizeDelay(val: number) { this._resizeDelay = val; }\n\n    @Input() get lazy() { return this._lazy; }\n    set lazy(val: boolean) { this._lazy = val; }\n\n    @Input() get disabled() { return this._disabled; }\n    set disabled(val: boolean) { this._disabled = val; }\n\n    @Input() get loaderDisabled() { return this._loaderDisabled; }\n    set loaderDisabled(val: boolean) { this._loaderDisabled = val; }\n\n    @Input() get columns() { return this._columns; }\n    set columns(val: any[]) { this._columns = val; }\n\n    @Input() get showSpacer() { return this._showSpacer; }\n    set showSpacer(val: boolean) { this._showSpacer = val; }\n\n    @Input() get showLoader() { return this._showLoader; }\n    set showLoader(val: boolean) { this._showLoader = val; }\n\n    @Input() get numToleratedItems() { return this._numToleratedItems; }\n    set numToleratedItems(val: number) { this._numToleratedItems = val; }\n\n    @Input() get loading() { return this._loading; }\n    set loading(val: boolean) { this._loading = val; }\n\n    @Input() get autoSize() { return this._autoSize; }\n    set autoSize(val: boolean) { this._autoSize = val; }\n\n    @Input() get trackBy() { return this._trackBy; }\n    set trackBy(val: any) { this._trackBy = val; }\n\n    @Input() get options() { return this._options; }\n    set options(val: ScrollerOptions) {\n        this._options = val;\n\n        if (val && typeof val === 'object') {\n            Object.entries(val).forEach(([k, v]) => this[`_${k}`] !== v && (this[`_${k}`] = v));\n        }\n    }\n\n    @ViewChild('element') elementViewChild: ElementRef;\n\n    @ViewChild('content') contentViewChild: ElementRef;\n\n    @ContentChildren(PrimeTemplate) templates: QueryList<any>;\n\n    @Output() onLazyLoad: EventEmitter<any> = new EventEmitter();\n\n    @Output() onScroll: EventEmitter<any> = new EventEmitter();\n\n    @Output() onScrollIndexChange: EventEmitter<any> = new EventEmitter();\n\n    _id: string;\n\n    _style: any;\n\n    _styleClass: string;\n\n    _tabindex: number = 0;\n\n    _items: any[];\n\n    _itemSize: any = 0;\n\n    _scrollHeight: string;\n\n    _scrollWidth: string;\n\n    _orientation: string = 'vertical';\n\n    _delay: number = 0;\n\n    _resizeDelay: number = 10;\n\n    _lazy: boolean = false;\n\n    _disabled: boolean = false;\n\n    _loaderDisabled: boolean = false;\n\n    _columns: any[];\n\n    _showSpacer: boolean = true;\n\n    _showLoader: boolean = false;\n\n    _numToleratedItems: any;\n\n    _loading: boolean;\n\n    _autoSize: boolean = false;\n\n    _trackBy: any;\n\n    _options: ScrollerOptions;\n\n    d_loading: boolean = false;\n\n    d_numToleratedItems: any;\n\n    contentEl: any;\n\n    contentTemplate: TemplateRef<any>;\n\n    itemTemplate: TemplateRef<any>;\n\n    loaderTemplate: TemplateRef<any>;\n\n    loaderIconTemplate: TemplateRef<any>;\n\n    first: any = 0;\n\n    last: any = 0;\n\n    numItemsInViewport: any = 0;\n\n    lastScrollPos: any = 0;\n\n    loaderArr: any[] = [];\n\n    spacerStyle: any = {};\n\n    contentStyle: any = {};\n\n    scrollTimeout: any;\n\n    resizeTimeout: any;\n\n    initialized: boolean = false;\n\n    windowResizeListener: any;\n\n    defaultWidth: number;\n\n    defaultHeight: number;\n\n    get vertical() {\n        return this._orientation === 'vertical';\n    }\n\n    get horizontal() {\n        return this._orientation === 'horizontal';\n    }\n\n    get both() {\n        return this._orientation === 'both';\n    }\n\n    get loadedItems() {\n        if (this._items && !this.d_loading) {\n            if (this.both)\n                return this._items.slice(this.first.rows, this.last.rows).map(item => this._columns ? item : item.slice(this.first.cols, this.last.cols));\n            else if (this.horizontal && this._columns)\n                return this._items;\n            else\n                return this._items.slice(this.first, this.last);\n        }\n\n        return [];\n    }\n\n    get loadedRows() {\n        return this.d_loading ? (this._loaderDisabled ? this.loaderArr : []) : this.loadedItems;\n    }\n\n    get loadedColumns() {\n        if (this._columns && (this.both || this.horizontal)) {\n            return this.d_loading && this._loaderDisabled ?\n                (this.both ? this.loaderArr[0] : this.loaderArr) :\n                this._columns.slice((this.both ? this.first.cols : this.first), (this.both ? this.last.cols : this.last));\n        }\n\n        return this._columns;\n    }\n\n    constructor(private cd: ChangeDetectorRef, private zone: NgZone) {\n        if (!this._disabled) {\n            this.zone.runOutsideAngular(() => {\n                this.windowResizeListener = this.onWindowResize.bind(this);\n\n                window.addEventListener('resize', this.windowResizeListener);\n                window.addEventListener('orientationchange', this.windowResizeListener);\n            });\n        }\n    }\n\n    ngOnInit() {\n        this.setInitialState();\n    }\n\n    ngOnChanges(simpleChanges: SimpleChanges) {\n        let isLoadingChanged = false;\n\n        if (simpleChanges.loading) {\n            const { previousValue, currentValue } = simpleChanges.loading;\n\n            if (this.lazy && previousValue !== currentValue && currentValue !== this.d_loading) {\n                this.d_loading = currentValue;\n                isLoadingChanged = true;\n            }\n        }\n\n        if (this.initialized) {\n            const isChanged = !isLoadingChanged && (simpleChanges.items || simpleChanges.itemSize || simpleChanges.scrollHeight || simpleChanges.scrollWidth);\n            isChanged && this.init();\n        }\n\n        if (simpleChanges.orientation) {\n            this.lastScrollPos = this.both ? { top: 0, left: 0 } : 0;\n        }\n\n        if (simpleChanges.numToleratedItems) {\n            const { previousValue, currentValue } = simpleChanges.numToleratedItems;\n\n            if (previousValue !== currentValue && currentValue !== this.d_numToleratedItems) {\n                this.d_numToleratedItems = currentValue;\n            }\n        }\n\n        if (simpleChanges.options) {\n            const { previousValue, currentValue } = simpleChanges.options;\n\n            if (this.lazy && previousValue?.loading !== currentValue?.loading && currentValue?.loading !== this.d_loading) {\n                this.d_loading = currentValue.loading;\n            }\n\n            if (previousValue?.numToleratedItems !== currentValue?.numToleratedItems && currentValue?.numToleratedItems !== this.d_numToleratedItems) {\n                this.d_numToleratedItems = currentValue.numToleratedItems;\n            }\n        }\n    }\n\n    ngAfterContentInit() {\n        this.templates.forEach((item) => {\n            switch (item.getType()) {\n                case 'content':\n                    this.contentTemplate = item.template;\n                    break;\n\n                case 'item':\n                    this.itemTemplate = item.template;\n                    break;\n\n                case 'loader':\n                    this.loaderTemplate = item.template;\n                    break;\n\n                case 'loadericon':\n                    this.loaderIconTemplate = item.template;\n                    break;\n\n                default:\n                    this.itemTemplate = item.template;\n                    break;\n            }\n        });\n    }\n\n    ngAfterViewInit() {\n        this.setContentEl(this.contentEl);\n        this.init();\n\n        this.defaultWidth = DomHandler.getWidth(this.elementViewChild.nativeElement);\n        this.defaultHeight = DomHandler.getHeight(this.elementViewChild.nativeElement);\n        this.initialized = true;\n    }\n\n    ngAfterViewChecked() {\n        this.calculateAutoSize();\n    }\n\n    ngOnDestroy() {\n        if (this.windowResizeListener) {\n            window.removeEventListener('resize', this.windowResizeListener);\n            window.removeEventListener('orientationchange', this.windowResizeListener);\n            this.windowResizeListener = null;\n        }\n    }\n\n    init() {\n        if (!this._disabled) {\n            this.setSize();\n            this.calculateOptions();\n            this.setSpacerSize();\n\n            this.cd.detectChanges();\n        }\n    }\n\n    setContentEl(el?: HTMLElement) {\n        this.contentEl = el || this.contentViewChild?.nativeElement || DomHandler.findSingle(this.elementViewChild?.nativeElement, '.p-scroller-content');\n    }\n\n    setInitialState() {\n        this.first = this.both ? { rows: 0, cols: 0 } : 0;\n        this.last = this.both ? { rows: 0, cols: 0 } : 0;\n        this.numItemsInViewport = this.both ? { rows: 0, cols: 0 } : 0;\n        this.lastScrollPos = this.both ? { top: 0, left: 0 } : 0;\n        this.d_loading = this._loading || false;\n        this.d_numToleratedItems = this._numToleratedItems;\n    }\n\n    getElementRef() {\n        return this.elementViewChild;\n    }\n\n    scrollTo(options: ScrollToOptions) {\n        this.lastScrollPos = this.both ? { top: 0, left: 0 } : 0;\n        this.elementViewChild?.nativeElement?.scrollTo(options);\n    }\n\n    scrollToIndex(index: number, behavior: ScrollBehavior = 'auto') {\n        const { numToleratedItems } = this.calculateNumItems();\n        const contentPos = this.getContentPosition();\n        const calculateFirst = (_index = 0, _numT) => (_index <= _numT ? 0 : _index);\n        const calculateCoord = (_first, _size, _cpos) => (_first * _size) + _cpos;\n        const scrollTo = (left = 0, top = 0) => this.scrollTo({ left, top, behavior });\n\n        if (this.both) {\n            const newFirst = { rows: calculateFirst(index[0], numToleratedItems[0]), cols: calculateFirst(index[1], numToleratedItems[1]) };\n            if (newFirst.rows !== this.first.rows || newFirst.cols !== this.first.cols) {\n                scrollTo(calculateCoord(newFirst.cols, this._itemSize[1], contentPos.left), calculateCoord(newFirst.rows, this._itemSize[0], contentPos.top));\n            }\n        }\n        else {\n            const newFirst = calculateFirst(index, numToleratedItems);\n\n            if (newFirst !== this.first) {\n                this.horizontal ? scrollTo(calculateCoord(newFirst, this._itemSize, contentPos.left), 0) : scrollTo(0, calculateCoord(newFirst, this._itemSize, contentPos.top));\n            }\n        }\n    }\n\n    scrollInView(index: number, to: ScrollerToType, behavior: ScrollBehavior = 'auto') {\n        if (to) {\n            const { first, viewport } = this.getRenderedRange();\n            const scrollTo = (left = 0, top = 0) => this.scrollTo({ left, top, behavior });\n            const isToStart = to === 'to-start';\n            const isToEnd = to === 'to-end';\n\n            if (isToStart) {\n                if (this.both) {\n                    if (viewport.first.rows - first.rows > index[0]) {\n                        scrollTo(viewport.first.cols * this._itemSize[1], (viewport.first.rows - 1) * this._itemSize[0]);\n                    }\n                    else if (viewport.first.cols - first.cols > index[1]) {\n                        scrollTo((viewport.first.cols - 1) * this._itemSize[1], viewport.first.rows * this._itemSize[0]);\n                    }\n                }\n                else {\n                    if (viewport.first - first > index) {\n                        const pos = (viewport.first - 1) * this._itemSize;\n                        this.horizontal ? scrollTo(pos, 0) : scrollTo(0, pos);\n                    }\n                }\n            }\n            else if (isToEnd) {\n                if (this.both) {\n                    if (viewport.last.rows - first.rows <= index[0] + 1) {\n                        scrollTo(viewport.first.cols * this._itemSize[1], (viewport.first.rows + 1) * this._itemSize[0]);\n                    }\n                    else if (viewport.last.cols - first.cols <= index[1] + 1) {\n                        scrollTo((viewport.first.cols + 1) * this._itemSize[1], viewport.first.rows * this._itemSize[0]);\n                    }\n                }\n                else {\n                    if (viewport.last - first <= index + 1) {\n                        const pos = (viewport.first + 1) * this._itemSize;\n                        this.horizontal ? scrollTo(pos, 0) : scrollTo(0, pos);\n                    }\n                }\n            }\n        }\n        else {\n            this.scrollToIndex(index, behavior);\n        }\n    }\n\n    getRenderedRange() {\n        const calculateFirstInViewport = (_pos, _size) => Math.floor(_pos / (_size || _pos));\n\n        let firstInViewport = this.first;\n        let lastInViewport: any = 0;\n\n        if (this.elementViewChild?.nativeElement) {\n            const { scrollTop, scrollLeft } = this.elementViewChild.nativeElement;\n\n            if (this.both) {\n                firstInViewport = { rows: calculateFirstInViewport(scrollTop, this._itemSize[0]), cols: calculateFirstInViewport(scrollLeft, this._itemSize[1]) };\n                lastInViewport = { rows: firstInViewport.rows + this.numItemsInViewport.rows, cols: firstInViewport.cols + this.numItemsInViewport.cols };\n            }\n            else {\n                const scrollPos = this.horizontal ? scrollLeft : scrollTop;\n                firstInViewport = calculateFirstInViewport(scrollPos, this._itemSize);\n                lastInViewport = firstInViewport + this.numItemsInViewport;\n            }\n        }\n\n        return {\n            first: this.first,\n            last: this.last,\n            viewport: {\n                first: firstInViewport,\n                last: lastInViewport\n            }\n        }\n    }\n\n    calculateNumItems() {\n        const contentPos = this.getContentPosition();\n        const contentWidth = this.elementViewChild?.nativeElement ? this.elementViewChild.nativeElement.offsetWidth - contentPos.left : 0;\n        const contentHeight = this.elementViewChild?.nativeElement ? this.elementViewChild.nativeElement.offsetHeight - contentPos.top : 0;\n        const calculateNumItemsInViewport = (_contentSize, _itemSize) => Math.ceil(_contentSize / (_itemSize || _contentSize));\n        const calculateNumToleratedItems = (_numItems) => Math.ceil(_numItems / 2);\n        const numItemsInViewport: any = this.both ?\n            { rows: calculateNumItemsInViewport(contentHeight, this._itemSize[0]), cols: calculateNumItemsInViewport(contentWidth, this._itemSize[1]) } :\n            calculateNumItemsInViewport((this.horizontal ? contentWidth : contentHeight), this._itemSize);\n\n        const numToleratedItems = this.d_numToleratedItems || (this.both ?\n            [calculateNumToleratedItems(numItemsInViewport.rows), calculateNumToleratedItems(numItemsInViewport.cols)] :\n            calculateNumToleratedItems(numItemsInViewport));\n\n        return { numItemsInViewport, numToleratedItems };\n    }\n\n    calculateOptions() {\n        const { numItemsInViewport, numToleratedItems } = this.calculateNumItems();\n        const calculateLast = (_first, _num, _numT, _isCols = false) => this.getLast(_first + _num + ((_first < _numT ? 2 : 3) * _numT), _isCols);\n        const first = this.first;\n        const last = this.both ?\n            { rows: calculateLast(this.first.rows, numItemsInViewport.rows, numToleratedItems[0]), cols: calculateLast(this.first.cols, numItemsInViewport.cols, numToleratedItems[1], true) } :\n            calculateLast(this.first, numItemsInViewport, numToleratedItems);\n\n        this.last = last;\n        this.numItemsInViewport = numItemsInViewport;\n        this.d_numToleratedItems = numToleratedItems;\n\n        if (this.showLoader) {\n            this.loaderArr = this.both ?\n                Array.from({ length: numItemsInViewport.rows }).map(() => Array.from({ length: numItemsInViewport.cols })) :\n                Array.from({ length: numItemsInViewport });\n        }\n\n        if (this._lazy) {\n            this.handleEvents('onLazyLoad', { first, last });\n        }\n    }\n\n    calculateAutoSize() {\n        if (this._autoSize && !this.d_loading) {\n            Promise.resolve().then(() => {\n                if (this.contentEl) {\n                    this.contentEl.style.minHeight = this.contentEl.style.minWidth = 'auto';\n\n                    const { offsetWidth, offsetHeight } = this.contentEl;\n\n                    (this.both || this.horizontal) && (this.elementViewChild.nativeElement.style.width = (offsetWidth < this.defaultWidth ? offsetWidth : this.defaultWidth) + 'px');\n                    (this.both || this.vertical) && (this.elementViewChild.nativeElement.style.height = (offsetHeight < this.defaultHeight ? offsetHeight : this.defaultHeight) + 'px');\n                    this.contentEl.style.minHeight = this.contentEl.style.minWidth = '';\n                }\n            });\n        }\n    }\n\n    getLast(last = 0, isCols = false) {\n        return this._items ? Math.min((isCols ? (this._columns || this._items[0]).length : this._items.length), last) : 0;\n    }\n\n    getContentPosition() {\n        if (this.contentEl) {\n            const style = getComputedStyle(this.contentEl);\n            const left = parseFloat(style.paddingLeft) + Math.max((parseFloat(style.left) || 0), 0);\n            const right = parseFloat(style.paddingRight) + Math.max((parseFloat(style.right) || 0), 0);\n            const top = parseFloat(style.paddingTop) + Math.max((parseFloat(style.top) || 0), 0);\n            const bottom = parseFloat(style.paddingBottom) + Math.max((parseFloat(style.bottom) || 0), 0);\n\n            return { left, right, top, bottom, x: left + right, y: top + bottom };\n        }\n\n        return { left: 0, right: 0, top: 0, bottom: 0, x: 0, y: 0 };\n    }\n\n    setSize() {\n        if (this.elementViewChild?.nativeElement) {\n            const parentElement = this.elementViewChild.nativeElement.parentElement.parentElement;\n            const width = this._scrollWidth || `${(this.elementViewChild.nativeElement.offsetWidth || parentElement.offsetWidth)}px`;\n            const height = this._scrollHeight || `${(this.elementViewChild.nativeElement.offsetHeight || parentElement.offsetHeight)}px`;\n            const setProp = (_name, _value) => this.elementViewChild.nativeElement.style[_name] = _value;\n\n            if (this.both || this.horizontal) {\n                setProp('height', height);\n                setProp('width', width);\n            }\n            else {\n                setProp('height', height);\n            }\n        }\n    }\n\n    setSpacerSize() {\n        if (this._items) {\n            const contentPos = this.getContentPosition();\n            const setProp = (_name, _value, _size, _cpos = 0) => this.spacerStyle = { ...this.spacerStyle, ...{ [`${_name}`]: (((_value || []).length * _size) + _cpos) + 'px' } };\n\n            if (this.both) {\n                setProp('height', this._items, this._itemSize[0], contentPos.y);\n                setProp('width', (this._columns || this._items[1]), this._itemSize[1], contentPos.x);\n            }\n            else {\n                this.horizontal ? setProp('width', (this._columns || this._items), this._itemSize, contentPos.x) : setProp('height', this._items, this._itemSize, contentPos.y);\n            }\n        }\n    }\n\n    setContentPosition(pos) {\n        if (this.contentEl) {\n            const first = pos ? pos.first : this.first;\n            const calculateTranslateVal = (_first, _size) => (_first * _size);\n            const setTransform = (_x = 0, _y = 0) => this.contentStyle = { ...this.contentStyle, ...{ transform: `translate3d(${_x}px, ${_y}px, 0)` } };\n\n            if (this.both) {\n                setTransform(calculateTranslateVal(first.cols, this._itemSize[1]), calculateTranslateVal(first.rows, this._itemSize[0]));\n            }\n            else {\n                const translateVal = calculateTranslateVal(first, this._itemSize);\n                this.horizontal ? setTransform(translateVal, 0) : setTransform(0, translateVal);\n            }\n        }\n    }\n\n    onScrollPositionChange(event) {\n        const target = event.target;\n        const contentPos = this.getContentPosition();\n        const calculateScrollPos = (_pos, _cpos) => _pos ? (_pos > _cpos ? _pos - _cpos : _pos) : 0;\n        const calculateCurrentIndex = (_pos, _size) => Math.floor(_pos / (_size || _pos));\n        const calculateTriggerIndex = (_currentIndex, _first, _last, _num, _numT, _isScrollDownOrRight) => {\n            return (_currentIndex <= _numT ? _numT : (_isScrollDownOrRight ? (_last - _num - _numT) : (_first + _numT - 1)))\n        };\n        const calculateFirst = (_currentIndex, _triggerIndex, _first, _last, _num, _numT, _isScrollDownOrRight) => {\n            if (_currentIndex <= _numT)\n                return 0;\n            else\n                return Math.max(0, _isScrollDownOrRight ?\n                    (_currentIndex < _triggerIndex ? _first : _currentIndex - _numT) :\n                    (_currentIndex > _triggerIndex ? _first : _currentIndex - (2 * _numT)));\n        };\n        const calculateLast = (_currentIndex, _first, _last, _num, _numT, _isCols = false) => {\n            let lastValue = _first + _num + (2 * _numT);\n\n            if (_currentIndex >= _numT) {\n                lastValue += (_numT + 1);\n            }\n\n            return this.getLast(lastValue, _isCols);\n        };\n\n        const scrollTop = calculateScrollPos(target.scrollTop, contentPos.top);\n        const scrollLeft = calculateScrollPos(target.scrollLeft, contentPos.left);\n\n        let newFirst = this.both ? { rows: 0, cols: 0 } : 0;\n        let newLast = this.last;\n        let isRangeChanged = false;\n        let newScrollPos = this.lastScrollPos;\n\n        if (this.both) {\n            const isScrollDown = this.lastScrollPos.top <= scrollTop;\n            const isScrollRight = this.lastScrollPos.left <= scrollLeft;\n            const currentIndex = { rows: calculateCurrentIndex(scrollTop, this._itemSize[0]), cols: calculateCurrentIndex(scrollLeft, this._itemSize[1]) };\n            const triggerIndex = {\n                rows: calculateTriggerIndex(currentIndex.rows, this.first.rows, this.last.rows, this.numItemsInViewport.rows, this.d_numToleratedItems[0], isScrollDown),\n                cols: calculateTriggerIndex(currentIndex.cols, this.first.cols, this.last.cols, this.numItemsInViewport.cols, this.d_numToleratedItems[1], isScrollRight)\n            };\n\n            newFirst = {\n                rows: calculateFirst(currentIndex.rows, triggerIndex.rows, this.first.rows, this.last.rows, this.numItemsInViewport.rows, this.d_numToleratedItems[0], isScrollDown),\n                cols: calculateFirst(currentIndex.cols, triggerIndex.cols, this.first.cols, this.last.cols, this.numItemsInViewport.cols, this.d_numToleratedItems[1], isScrollRight)\n            };\n            newLast = {\n                rows: calculateLast(currentIndex.rows, newFirst.rows, this.last.rows, this.numItemsInViewport.rows, this.d_numToleratedItems[0]),\n                cols: calculateLast(currentIndex.cols, newFirst.cols, this.last.cols, this.numItemsInViewport.cols, this.d_numToleratedItems[1], true)\n            };\n\n            isRangeChanged = (newFirst.rows !== this.first.rows || newLast.rows !== this.last.rows) || (newFirst.cols !== this.first.cols || newLast.cols !== this.last.cols);\n            newScrollPos = { top: scrollTop, left: scrollLeft };\n        }\n        else {\n            const scrollPos = this.horizontal ? scrollLeft : scrollTop;\n            const isScrollDownOrRight = this.lastScrollPos <= scrollPos;\n            const currentIndex = calculateCurrentIndex(scrollPos, this._itemSize);\n            const triggerIndex = calculateTriggerIndex(currentIndex, this.first, this.last, this.numItemsInViewport, this.d_numToleratedItems, isScrollDownOrRight);\n\n            newFirst = calculateFirst(currentIndex, triggerIndex, this.first, this.last, this.numItemsInViewport, this.d_numToleratedItems, isScrollDownOrRight);\n            newLast = calculateLast(currentIndex, newFirst, this.last, this.numItemsInViewport, this.d_numToleratedItems);\n            isRangeChanged = newFirst !== this.first || newLast !== this.last;\n            newScrollPos = scrollPos;\n        }\n\n        return {\n            first: newFirst,\n            last: newLast,\n            isRangeChanged,\n            scrollPos: newScrollPos\n        }\n    }\n\n    onScrollChange(event) {\n        const { first, last, isRangeChanged, scrollPos } = this.onScrollPositionChange(event);\n\n        if (isRangeChanged) {\n            const newState = { first, last };\n\n            this.setContentPosition(newState);\n\n            this.first = first;\n            this.last = last;\n            this.lastScrollPos = scrollPos;\n\n            this.handleEvents('onScrollIndexChange', newState);\n\n            if (this._lazy) {\n                this.handleEvents('onLazyLoad', newState);\n            }\n        }\n    }\n\n    onContainerScroll(event) {\n        this.handleEvents('onScroll', { originalEvent: event });\n\n        if (this._delay) {\n            if (this.scrollTimeout) {\n                clearTimeout(this.scrollTimeout);\n            }\n\n            if (!this.d_loading && this.showLoader) {\n                const { isRangeChanged: changed } = this.onScrollPositionChange(event);\n                if (changed) {\n                    this.d_loading = true;\n\n                    this.cd.detectChanges();\n                }\n            }\n\n            this.scrollTimeout = setTimeout(() => {\n                this.onScrollChange(event);\n\n                if (this.d_loading && this.showLoader && (!this._lazy || this._loading === undefined)) {\n                    this.d_loading = false;\n\n                    this.cd.detectChanges();\n                }\n            }, this._delay);\n        }\n        else {\n            this.onScrollChange(event);\n        }\n    }\n\n    onWindowResize() {\n        if (this.resizeTimeout) {\n            clearTimeout(this.resizeTimeout);\n        }\n\n        this.resizeTimeout = setTimeout(() => {\n            if (this.elementViewChild) {\n                const [width, height] = [DomHandler.getWidth(this.elementViewChild.nativeElement), DomHandler.getHeight(this.elementViewChild.nativeElement)];\n                const [isDiffWidth, isDiffHeight] = [width !== this.defaultWidth, height !== this.defaultHeight];\n                const reinit = this.both ? (isDiffWidth || isDiffHeight) : (this.horizontal ? isDiffWidth : (this.vertical ? isDiffHeight : false));\n\n                reinit && this.zone.run(() => {\n                    this.d_numToleratedItems = this._numToleratedItems;\n                    this.defaultWidth = width;\n                    this.defaultHeight = height;\n\n                    this.init();\n                });\n            }\n        }, this._resizeDelay);\n    }\n\n    handleEvents(name, params) {\n        return this.options && this.options[name] ? this.options[name](params) : this[name].emit(params);\n    }\n\n    getContentOptions() {\n        return {\n            contentStyleClass: `p-scroller-content ${this.d_loading ? 'p-scroller-loading' : ''}`,\n            items: this.loadedItems,\n            getItemOptions: (index) => this.getOptions(index),\n            loading: this.d_loading,\n            getLoaderOptions: (index, options?) => this.getLoaderOptions(index, options),\n            itemSize: this._itemSize,\n            rows: this.loadedRows,\n            columns: this.loadedColumns,\n            spacerStyle: this.spacerStyle,\n            contentStyle: this.contentStyle,\n            vertical: this.vertical,\n            horizontal: this.horizontal,\n            both: this.both\n        }\n    }\n\n    getOptions(renderedIndex) {\n        const count = (this._items || []).length;\n        const index = this.both ? this.first.rows + renderedIndex : this.first + renderedIndex;\n\n        return {\n            index,\n            count,\n            first: index === 0,\n            last: index === (count - 1),\n            even: index % 2 === 0,\n            odd: index % 2 !== 0\n        }\n    }\n\n    getLoaderOptions(index, extOptions) {\n        const count = this.loaderArr.length;\n\n        return {\n            index,\n            count,\n            first: index === 0,\n            last: index === (count - 1),\n            even: index % 2 === 0,\n            odd: index % 2 !== 0,\n            ...extOptions\n        }\n    }\n}\n\n@NgModule({\n    imports: [CommonModule],\n    exports: [Scroller],\n    declarations: [Scroller]\n})\nexport class ScrollerModule { }\n","/**\n * Generated bundle index. 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