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@catull/igniteui-angular

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Ignite UI for Angular is a dependency-free Angular toolkit for building modern web apps

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import { __extends } from "tslib"; import { ScrollStrategy } from './scroll-strategy'; /** * Uses a tolerance and closes the shown component upon scrolling if the tolerance is exceeded */ var CloseScrollStrategy = /** @class */ (function (_super) { __extends(CloseScrollStrategy, _super); function CloseScrollStrategy(scrollContainer) { var _this = _super.call(this, scrollContainer) || this; _this._initialized = false; _this.onScroll = function (ev) { if (!_this._sourceElement) { return; } _this.cumulativeScrollTop += _this._sourceElement.scrollTop; _this.cumulativeScrollLeft += _this._sourceElement.scrollLeft; if (Math.abs(_this.cumulativeScrollTop - _this.initialScrollTop) > _this._threshold || Math.abs(_this.cumulativeScrollLeft - _this.initialScrollLeft) > _this._threshold) { _this._document.removeEventListener('scroll', _this.onScroll, true); _this._overlayService.hide(_this._id); } }; _this._scrollContainer = scrollContainer; _this._threshold = 10; _this.cumulativeScrollTop = 0; _this.cumulativeScrollLeft = 0; return _this; } /** @inheritdoc */ CloseScrollStrategy.prototype.initialize = function (document, overlayService, id) { if (this._initialized) { return; } this._overlayService = overlayService; this._id = id; this._document = document; this._initialized = true; }; /** @inheritdoc */ CloseScrollStrategy.prototype.attach = function () { if (this._scrollContainer) { this._scrollContainer.addEventListener('scroll', this.onScroll); this._sourceElement = this._scrollContainer; } else { this._document.addEventListener('scroll', this.onScroll); if (document.documentElement.scrollHeight > document.documentElement.clientHeight) { this._sourceElement = document.documentElement; } else if (document.body.scrollHeight > document.body.clientHeight) { this._sourceElement = document.body; } } if (!this._sourceElement) { return; } this.cumulativeScrollTop = 0; this.cumulativeScrollLeft = 0; this.initialScrollTop = this._sourceElement.scrollTop; this.initialScrollLeft = this._sourceElement.scrollLeft; }; /** @inheritdoc */ CloseScrollStrategy.prototype.detach = function () { // TODO: check why event listener removes only on first call and remains on each next!!! if (this._scrollContainer) { this._scrollContainer.removeEventListener('scroll', this.onScroll); } else { this._document.removeEventListener('scroll', this.onScroll); } this._sourceElement = null; this.cumulativeScrollTop = 0; this.cumulativeScrollLeft = 0; this.initialScrollTop = 0; this.initialScrollLeft = 0; this._initialized = false; }; return CloseScrollStrategy; }(ScrollStrategy)); export { CloseScrollStrategy }; //# 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{ IgxOverlayService } from '../overlay';\nimport { ScrollStrategy } from './scroll-strategy';\n\n/**\n * Uses a tolerance and closes the shown component upon scrolling if the tolerance is exceeded\n */\nexport class CloseScrollStrategy extends ScrollStrategy {\n    private _document: Document;\n    private _overlayService: IgxOverlayService;\n    private _id: string;\n    private initialScrollTop: number;\n    private initialScrollLeft: number;\n    private cumulativeScrollTop: number;\n    private cumulativeScrollLeft: number;\n    private _threshold: number;\n    private _initialized = false;\n    private _sourceElement: Element;\n    private _scrollContainer: HTMLElement;\n\n    constructor(scrollContainer?: HTMLElement) {\n        super(scrollContainer);\n        this._scrollContainer = scrollContainer;\n        this._threshold = 10;\n        this.cumulativeScrollTop = 0;\n        this.cumulativeScrollLeft = 0;\n    }\n\n    /** @inheritdoc */\n    public initialize(document: Document, overlayService: IgxOverlayService, id: string) {\n        if (this._initialized) {\n            return;\n        }\n        this._overlayService = overlayService;\n        this._id = id;\n        this._document = document;\n        this._initialized = true;\n    }\n\n    /** @inheritdoc */\n    public attach(): void {\n        if (this._scrollContainer) {\n            this._scrollContainer.addEventListener('scroll', this.onScroll);\n            this._sourceElement = this._scrollContainer;\n        } else {\n            this._document.addEventListener('scroll', this.onScroll);\n            if (document.documentElement.scrollHeight > document.documentElement.clientHeight) {\n                this._sourceElement = document.documentElement as Element;\n            } else if (document.body.scrollHeight > document.body.clientHeight) {\n                this._sourceElement = document.body as Element;\n            }\n        }\n\n        if (!this._sourceElement) {\n            return;\n        }\n\n        this.cumulativeScrollTop = 0;\n        this.cumulativeScrollLeft = 0;\n        this.initialScrollTop = this._sourceElement.scrollTop;\n        this.initialScrollLeft = this._sourceElement.scrollLeft;\n    }\n\n    /** @inheritdoc */\n    public detach(): void {\n        // TODO: check why event listener removes only on first call and remains on each next!!!\n        if (this._scrollContainer) {\n            this._scrollContainer.removeEventListener('scroll', this.onScroll);\n        } else {\n            this._document.removeEventListener('scroll', this.onScroll);\n        }\n        this._sourceElement = null;\n        this.cumulativeScrollTop = 0;\n        this.cumulativeScrollLeft = 0;\n        this.initialScrollTop = 0;\n        this.initialScrollLeft = 0;\n        this._initialized = false;\n    }\n\n    private onScroll = (ev: Event) => {\n        if (!this._sourceElement) {\n            return;\n        }\n\n        this.cumulativeScrollTop += this._sourceElement.scrollTop;\n        this.cumulativeScrollLeft += this._sourceElement.scrollLeft;\n\n        if (Math.abs(this.cumulativeScrollTop - this.initialScrollTop) > this._threshold ||\n            Math.abs(this.cumulativeScrollLeft - this.initialScrollLeft) > this._threshold) {\n            this._document.removeEventListener('scroll', this.onScroll, true);\n            this._overlayService.hide(this._id);\n        }\n    }\n}\n"]}