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All rights reserved.\r\nLicensed under the Apache License, Version 2.0 (the \"License\"); you may not use\r\nthis file except in compliance with the License. You may obtain a copy of the\r\nLicense at http://www.apache.org/licenses/LICENSE-2.0\r\n\r\nTHIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\r\nKIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED\r\nWARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,\r\nMERCHANTABLITY OR NON-INFRINGEMENT.\r\n\r\nSee the Apache Version 2.0 License for specific language governing permissions\r\nand limitations under the License.\r\n***************************************************************************** */\r\n/* global Reflect, Promise */\r\n\r\nvar extendStatics = function(d, b) {\r\n extendStatics = Object.setPrototypeOf ||\r\n ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\r\n function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\r\n return extendStatics(d, b);\r\n};\r\n\r\nexport function __extends(d, b) {\r\n extendStatics(d, b);\r\n function __() { this.constructor = d; }\r\n d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\r\n}\r\n\r\nexport var __assign = function() {\r\n __assign = Object.assign || function __assign(t) {\r\n for (var s, i = 1, n = arguments.length; i < n; i++) {\r\n s = arguments[i];\r\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];\r\n }\r\n return t;\r\n }\r\n return __assign.apply(this, arguments);\r\n}\r\n\r\nexport function __rest(s, e) {\r\n var t = {};\r\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)\r\n t[p] = s[p];\r\n if (s != null && typeof Object.getOwnPropertySymbols === \"function\")\r\n for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) if (e.indexOf(p[i]) < 0)\r\n t[p[i]] = s[p[i]];\r\n return t;\r\n}\r\n\r\nexport function __decorate(decorators, target, key, desc) {\r\n var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\r\n if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\r\n else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\r\n return c > 3 && r && Object.defineProperty(target, key, r), r;\r\n}\r\n\r\nexport function __param(paramIndex, decorator) {\r\n return function (target, key) { decorator(target, key, paramIndex); }\r\n}\r\n\r\nexport function __metadata(metadataKey, metadataValue) {\r\n if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(metadataKey, metadataValue);\r\n}\r\n\r\nexport function __awaiter(thisArg, _arguments, P, generator) {\r\n return new (P || (P = Promise))(function (resolve, reject) {\r\n function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\r\n function rejected(value) { try { step(generator[\"throw\"](value)); } catch (e) { reject(e); } }\r\n function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }\r\n step((generator = generator.apply(thisArg, _arguments || [])).next());\r\n });\r\n}\r\n\r\nexport function __generator(thisArg, body) {\r\n var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\r\n return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\r\n function verb(n) { return function (v) { return step([n, v]); }; }\r\n function step(op) {\r\n if (f) throw new TypeError(\"Generator is already executing.\");\r\n while (_) try {\r\n if (f = 1, y && (t = op[0] & 2 ? y[\"return\"] : op[0] ? y[\"throw\"] || ((t = y[\"return\"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;\r\n if (y = 0, t) op = [op[0] & 2, t.value];\r\n switch (op[0]) {\r\n case 0: case 1: t = op; break;\r\n case 4: _.label++; return { value: op[1], done: false };\r\n case 5: _.label++; y = op[1]; op = [0]; continue;\r\n case 7: op = _.ops.pop(); _.trys.pop(); continue;\r\n default:\r\n if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\r\n if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\r\n if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\r\n if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\r\n if (t[2]) _.ops.pop();\r\n _.trys.pop(); continue;\r\n }\r\n op = body.call(thisArg, _);\r\n } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\r\n if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\r\n }\r\n}\r\n\r\nexport function __exportStar(m, exports) {\r\n for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];\r\n}\r\n\r\nexport function __values(o) {\r\n var m = typeof Symbol === \"function\" && o[Symbol.iterator], i = 0;\r\n if (m) return m.call(o);\r\n return {\r\n next: function () {\r\n if (o && i >= o.length) o = void 0;\r\n return { value: o && o[i++], done: !o };\r\n }\r\n };\r\n}\r\n\r\nexport function __read(o, n) {\r\n var m = typeof Symbol === \"function\" && o[Symbol.iterator];\r\n if (!m) return o;\r\n var i = m.call(o), r, ar = [], e;\r\n try {\r\n while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);\r\n }\r\n catch (error) { e = { error: error }; }\r\n finally {\r\n try {\r\n if (r && !r.done && (m = i[\"return\"])) m.call(i);\r\n }\r\n finally { if (e) throw e.error; }\r\n }\r\n return ar;\r\n}\r\n\r\nexport function __spread() {\r\n for (var ar = [], i = 0; i < arguments.length; i++)\r\n ar = ar.concat(__read(arguments[i]));\r\n return ar;\r\n}\r\n\r\nexport function __await(v) {\r\n return this instanceof __await ? 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i[Symbol.asyncIterator] = function () { return this; }, i);\r\n function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }\r\n function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }\r\n}\r\n\r\nexport function __makeTemplateObject(cooked, raw) {\r\n if (Object.defineProperty) { Object.defineProperty(cooked, \"raw\", { value: raw }); } else { cooked.raw = raw; }\r\n return cooked;\r\n};\r\n\r\nexport function __importStar(mod) {\r\n if (mod && mod.__esModule) return mod;\r\n var result = {};\r\n if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];\r\n result.default = mod;\r\n return result;\r\n}\r\n\r\nexport function __importDefault(mod) {\r\n return (mod && mod.__esModule) ? mod : { default: mod };\r\n}\r\n","import { Directive, TemplateRef, ViewContainerRef } from '@angular/core';\nimport { TemplatePortalDirective } from '@angular/cdk/portal';\n\n@Directive({selector: '[tdVirtualScrollRow]'})\nexport class TdVirtualScrollRowDirective extends TemplatePortalDirective {\n\n constructor(templateRef: TemplateRef<any>,\n viewContainerRef: ViewContainerRef) {\n super(templateRef, viewContainerRef);\n }\n \n}\n","import { Component, Directive, Input, Output, EventEmitter, ContentChild, AfterViewInit, ViewChild,\n ChangeDetectionStrategy, ChangeDetectorRef, QueryList, ViewChildren, ElementRef, HostListener,\n Renderer2, AfterViewChecked, OnDestroy, TrackByFunction } from '@angular/core';\nimport { DomSanitizer, SafeStyle } from '@angular/platform-browser';\n\nimport { Subscription, Subject } from 'rxjs';\nimport { debounceTime } from 'rxjs/operators';\n\nimport { TdVirtualScrollRowDirective } from './virtual-scroll-row.directive';\n\nconst TD_VIRTUAL_OFFSET: number = 2;\nconst SCROLL_DEBOUNCE: number = 200;\n\nexport interface ITdVirtualScrollBottomEvent {\n lastRow: any;\n lastIndex: number;\n}\n\n@Component({\n selector: 'td-virtual-scroll-container',\n styleUrls: ['./virtual-scroll-container.component.scss' ],\n templateUrl: './virtual-scroll-container.component.html',\n changeDetection: ChangeDetectionStrategy.OnPush,\n})\nexport class TdVirtualScrollContainerComponent implements AfterViewInit, AfterViewChecked, OnDestroy {\n\n private _subs: Subscription[] = [];\n private _bottom: Subject<any> = new Subject();\n private _initialized: boolean = false;\n\n private _totalHeight: number = 0;\n private _hostHeight: number = 0;\n private _scrollVerticalOffset: number = 0;\n private _offsetTransform: SafeStyle;\n\n private _fromRow: number = 0;\n private _toRow: number = 0;\n\n private _data: any[];\n private _virtualData: any[];\n\n /**\n * data: any[]\n * List of items to virtually iterate on.\n */\n @Input('data')\n set data(data: any[]) {\n this._data = data;\n if (this._initialized) {\n this._calculateVirtualRows();\n }\n this._changeDetectorRef.markForCheck();\n }\n get data(): any[] {\n return this._data;\n }\n\n get virtualData(): any[] {\n return this._virtualData;\n }\n\n /**\n * bottom: function\n * Method to be executed when user scrolled to the last item of the list.\n * An [ITdVirtualScrollBottomEvent] event is emitted\n */\n @Output() bottom: EventEmitter<ITdVirtualScrollBottomEvent> = new EventEmitter<ITdVirtualScrollBottomEvent>();\n\n @ViewChildren('rowElement') _rows: QueryList<ElementRef>;\n\n @ContentChild(TdVirtualScrollRowDirective) _rowTemplate: TdVirtualScrollRowDirective;\n\n get rowHeight(): number {\n if (this._rows && this._rows.toArray()[0]) {\n return this._rows.toArray()[0].nativeElement.getBoundingClientRect().height;\n }\n return 0;\n }\n\n get totalHeight(): number {\n return this._totalHeight;\n }\n\n get fromRow(): number {\n return this._fromRow;\n }\n\n get toRow(): number {\n return this._toRow;\n }\n\n get offsetTransform(): SafeStyle {\n return this._offsetTransform;\n }\n\n constructor(private _elementRef: ElementRef,\n private _domSanitizer: DomSanitizer,\n private _renderer: Renderer2,\n private _changeDetectorRef: ChangeDetectorRef) {}\n\n ngAfterViewInit(): void {\n this._subs.push(this._rows.changes.subscribe(() => {\n this._calculateVirtualRows();\n }));\n this._initialized = true;\n this._calculateVirtualRows();\n\n this._subs.push(this._bottom.pipe(\n debounceTime(SCROLL_DEBOUNCE),\n ).subscribe(() => {\n this.bottom.emit({\n lastRow: this._data[this._data.length - 1],\n lastIndex: this.toRow,\n });\n }));\n }\n\n ngAfterViewChecked(): void {\n let newHostHeight: number = this._elementRef.nativeElement.getBoundingClientRect().height;\n if (this._hostHeight !== newHostHeight) {\n this._hostHeight = newHostHeight;\n if (this._initialized) {\n this._calculateVirtualRows();\n }\n }\n }\n\n ngOnDestroy(): void {\n if (this._subs) {\n this._subs.forEach((sub: Subscription) => {\n sub.unsubscribe();\n });\n }\n }\n\n /**\n * trackBy?: TrackByFunction\n * This accepts the same trackBy function [ngFor] does.\n * https://angular.io/api/core/TrackByFunction\n */\n @Input('trackBy') trackBy: TrackByFunction<any> = (index: number, item: any) => {\n return item;\n }\n\n @HostListener('scroll', ['$event'])\n handleScroll(event: Event): void {\n let element: HTMLElement = (<HTMLElement>event.target);\n if (element) {\n let verticalScroll: number = element.scrollTop;\n if (this._scrollVerticalOffset !== verticalScroll) {\n this._scrollVerticalOffset = verticalScroll;\n if (this._initialized) {\n this._calculateVirtualRows();\n }\n }\n if (this._initialized) {\n // check to see if bottom was hit to throw the bottom event\n if ((this._data.length * this.rowHeight) - (verticalScroll + this._hostHeight) === 0) {\n this._bottom.next();\n }\n }\n }\n }\n\n /**\n * Method to refresh and recalculate the virtual rows\n * e.g. after changing the [data] content\n */\n refresh(): void {\n this._calculateVirtualRows();\n }\n\n /**\n * Method to scroll to a specific row of the list.\n */\n scrollTo(row: number): void {\n this._elementRef.nativeElement.scrollTop = row * this.rowHeight;\n this._changeDetectorRef.markForCheck();\n }\n\n /**\n * Method to scroll to the start of the list.\n */\n scrollToStart(): void {\n this.scrollTo(0);\n this._changeDetectorRef.markForCheck();\n }\n\n /**\n * Method to scroll to the end of the list.\n */\n scrollToEnd(): void {\n this.scrollTo(this.totalHeight / this.rowHeight);\n this._changeDetectorRef.markForCheck();\n }\n\n private _calculateVirtualRows(): void {\n if (this._data) {\n this._totalHeight = this._data.length * this.rowHeight;\n let fromRow: number = Math.floor((this._scrollVerticalOffset / this.rowHeight)) - TD_VIRTUAL_OFFSET;\n this._fromRow = fromRow > 0 ? fromRow : 0;\n let range: number = Math.floor((this._hostHeight / this.rowHeight)) + (TD_VIRTUAL_OFFSET * 2);\n let toRow: number = range + this.fromRow;\n if (isFinite(toRow) && toRow > this._data.length) {\n toRow = this._data.length;\n } else if (!isFinite(toRow)) {\n toRow = TD_VIRTUAL_OFFSET;\n }\n this._toRow = toRow;\n } else {\n this._totalHeight = 0;\n this._fromRow = 0;\n this._toRow = 0;\n }\n\n let offset: number = 0;\n if (this._scrollVerticalOffset > (TD_VIRTUAL_OFFSET * this.rowHeight)) {\n offset = this.fromRow * this.rowHeight;\n }\n\n this._offsetTransform = this._domSanitizer.bypassSecurityTrustStyle('translateY(' + (offset - this.totalHeight) + 'px)');\n if (this._data) {\n this._virtualData = this.data.slice(this.fromRow, this.toRow);\n }\n\n // mark for check at the end of the queue so we are sure\n // that the changes will be marked\n Promise.resolve().then(() => {\n this._changeDetectorRef.markForCheck();\n });\n }\n}\n","import { NgModule, Type } from '@angular/core';\nimport { CommonModule } from '@angular/common';\n\nimport { TdVirtualScrollRowDirective } from './virtual-scroll-row.directive';\nimport { TdVirtualScrollContainerComponent } from './virtual-scroll-container.component';\n\nconst TD_VIRTUAL_SCROLL: Type<any>[] = [\n TdVirtualScrollRowDirective,\n TdVirtualScrollContainerComponent,\n];\n\n@NgModule({\n imports: [\n CommonModule,\n ],\n declarations: [\n TD_VIRTUAL_SCROLL,\n ],\n exports: [\n TD_VIRTUAL_SCROLL,\n ],\n})\nexport class CovalentVirtualScrollModule {\n\n}\n"]} |