@catull/igniteui-angular
Version:
Ignite UI for Angular is a dependency-free Angular toolkit for building modern web apps
81 lines • 11.4 kB
JavaScript
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"]}