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{"version":3,"file":"virtual-scroll.d.ts","sources":["virtual-scroll.d.ts"],"names":[],"mappings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sourcesContent":["import { ElementRef, IterableDiffers, NgZone, SimpleChanges, TrackByFunction } from '@angular/core';\nimport { FooterHeightFn, HeaderFn, HeaderHeightFn, ItemHeightFn } from '@ionic/core';\nimport { VirtualFooter } from './virtual-footer';\nimport { VirtualHeader } from './virtual-header';\nimport { VirtualItem } from './virtual-item';\nexport declare interface IonVirtualScroll {\n /**\n * It is important to provide this\n * if virtual item height will be significantly larger than the default\n * The approximate height of each virtual item template's cell.\n * This dimension is used to help determine how many cells should\n * be created when initialized, and to help calculate the height of\n * the scrollable area. This height value can only use `px` units.\n * Note that the actual rendered size of each cell comes from the\n * app's CSS, whereas this approximation is used to help calculate\n * initial dimensions before the item has been rendered.\n */\n approxItemHeight: number;\n /**\n * The approximate height of each header template's cell.\n * This dimension is used to help determine how many cells should\n * be created when initialized, and to help calculate the height of\n * the scrollable area. This height value can only use `px` units.\n * Note that the actual rendered size of each cell comes from the\n * app's CSS, whereas this approximation is used to help calculate\n * initial dimensions before the item has been rendered.\n */\n approxHeaderHeight: number;\n /**\n * The approximate width of each footer template's cell.\n * This dimension is used to help determine how many cells should\n * be created when initialized, and to help calculate the height of\n * the scrollable area. This height value can only use `px` units.\n * Note that the actual rendered size of each cell comes from the\n * app's CSS, whereas this approximation is used to help calculate\n * initial dimensions before the item has been rendered.\n */\n approxFooterHeight: number;\n /**\n * Section headers and the data used within its given\n * template can be dynamically created by passing a function to `headerFn`.\n * For example, a large list of contacts usually has dividers between each\n * letter in the alphabet. App's can provide their own custom `headerFn`\n * which is called with each record within the dataset. The logic within\n * the header function can decide if the header template should be used,\n * and what data to give to the header template. The function must return\n * `null` if a header cell shouldn't be created.\n */\n headerFn?: HeaderFn;\n /**\n * Section footers and the data used within its given\n * template can be dynamically created by passing a function to `footerFn`.\n * The logic within the footer function can decide if the footer template\n * should be used, and what data to give to the footer template. The function\n * must return `null` if a footer cell shouldn't be created.\n */\n footerFn?: HeaderFn;\n /**\n * The data that builds the templates within the virtual scroll.\n * It's important to note that when this data has changed, then the\n * entire virtual scroll is reset, which is an expensive operation and\n * should be avoided if possible.\n */\n items?: any[] | null;\n /**\n * An optional function that maps each item within their height.\n * When this function is provided, heavy optimizations and fast path can be taked by\n * `ion-virtual-scroll` leading to massive performance improvements.\n *\n * This function allows to skip all DOM reads, which can be Doing so leads\n * to massive performance\n */\n itemHeight?: ItemHeightFn;\n /**\n * An optional function that maps each item header within their height.\n */\n headerHeight?: HeaderHeightFn;\n /**\n * An optional function that maps each item footer within their height.\n */\n footerHeight?: FooterHeightFn;\n /**\n * Same as `ngForTrackBy` which can be used on `ngFor`.\n */\n trackBy: TrackByFunction<any>;\n /**\n * This method marks the tail the items array as dirty, so they can be re-rendered. It's equivalent to calling: ```js * virtualScroll.checkRange(lastItemLen, items.length - lastItemLen); * ```\n */\n 'checkEnd': () => void;\n /**\n * This method marks a subset of items as dirty, so they can be re-rendered. Items should be marked as dirty any time the content or their style changes. The subset of items to be updated can are specifing by an offset and a length.\n */\n 'checkRange': (offset: number, len?: number) => void;\n /**\n * Returns the position of the virtual item at the given index.\n */\n 'positionForItem': (index: number) => Promise<number>;\n}\nexport declare class IonVirtualScroll {\n private z;\n private iterableDiffers;\n private differ?;\n private el;\n private refMap;\n itmTmp: VirtualItem;\n hdrTmp: VirtualHeader;\n ftrTmp: VirtualFooter;\n constructor(z: NgZone, iterableDiffers: IterableDiffers, elementRef: ElementRef);\n ngOnChanges(changes: SimpleChanges): void;\n ngDoCheck(): void;\n private nodeRender;\n private getComponent;\n}\n"]} |