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ngx-parallax-scroll

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This is a simple angular plugin, that allows us to implement parallax effect for some element in page

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/** * @fileoverview added by tsickle * @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc */ import { Directive, ElementRef, Renderer2, Input, Inject, PLATFORM_ID } from '@angular/core'; import { isDevMode } from '@angular/core'; import { isPlatformServer } from '@angular/common'; import { fromEvent } from 'rxjs'; import { throttleTime } from 'rxjs/operators'; var ParallaxScrollDirective = /** @class */ (function () { function ParallaxScrollDirective(elem, renderer, platformId) { this.elem = elem; this.renderer = renderer; this.platformId = platformId; this._parallaxTimingFunVal = 'linear'; this._parallaxThrottleTime = 0; this.directiveName = this.constructor.name; } /** * @return {?} */ ParallaxScrollDirective.prototype.ngOnInit = /** * @return {?} */ function () { if (isPlatformServer(this.platformId)) return; // Initing parallax effect and setting element styles this.initParallax(); this.setParallaxElTransform(); this.setParallaxTransition(); }; /** * @param {?} changes * @return {?} */ ParallaxScrollDirective.prototype.ngOnChanges = /** * @param {?} changes * @return {?} */ function (changes) { // Setting parallax options from config object or input props /** @type {?} */ var prlxSpeed = (changes['parallaxSpeed'] && changes['parallaxSpeed'].currentValue) || (changes['config'] && changes['config'].currentValue.parallaxSpeed); /** @type {?} */ var prlxSmoothness = (changes['parallaxSmoothness'] && changes['parallaxSmoothness'].currentValue) || (changes['config'] && changes['config'].currentValue.parallaxSmoothness); /** @type {?} */ var prlxDirection = (changes['parallaxDirection'] && changes['parallaxDirection'].currentValue) || (changes['config'] && changes['config'].currentValue.parallaxDirection); /** @type {?} */ var prlxTimingFunction = (changes['parallaxTimingFunction'] && changes['parallaxTimingFunction'].currentValue) || (changes['config'] && changes['config'].currentValue.parallaxTimingFunction); /** @type {?} */ var prlxThrottleTime = (changes['parallaxThrottleTime'] && changes['parallaxThrottleTime'].currentValue) || (changes['config'] && changes['config'].currentValue.parallaxThrottleTime); this.setParallaxSpeed(prlxSpeed); this.setParallaxSmoothness(prlxSmoothness); this.setParallaxDirection(prlxDirection); this.setParallaxTimingFun(prlxTimingFunction); this.setParallaxThrottleTime(prlxThrottleTime); }; /** * @return {?} */ ParallaxScrollDirective.prototype.ngAfterViewInit = /** * @return {?} */ function () { }; /** * @return {?} */ ParallaxScrollDirective.prototype.ngOnDestroy = /** * @return {?} */ function () { this.scrollSubscribtion && this.scrollSubscribtion.unsubscribe(); }; // Setting parallax effect and setting element styles // Setting parallax effect and setting element styles /** * @return {?} */ ParallaxScrollDirective.prototype.initParallax = // Setting parallax effect and setting element styles /** * @return {?} */ function () { var _this = this; this.scrollSubscribtion = fromEvent(window, 'scroll') .pipe(throttleTime(this.prlxThrottleTime)) .subscribe((/** * @return {?} */ function () { _this.setParallaxElTransform(); })); }; // Setting parallax speed effect styles // Setting parallax speed effect styles /** * @return {?} */ ParallaxScrollDirective.prototype.setParallaxElTransform = // Setting parallax speed effect styles /** * @return {?} */ function () { /** @type {?} */ var scrolled = window.pageYOffset; this.renderer.setStyle(this.elem.nativeElement, 'transform', "translateY(" + scrolled * this.prlxSpeed + "px) translateZ(0)"); }; // Setting parallax smooth effect styles, based on CSS animation-timing-function // Setting parallax smooth effect styles, based on CSS animation-timing-function /** * @return {?} */ ParallaxScrollDirective.prototype.setParallaxTransition = // Setting parallax smooth effect styles, based on CSS animation-timing-function /** * @return {?} */ function () { this.renderer.setStyle(this.elem.nativeElement, 'transition', "transform " + this.prlxSmoothness + "s " + this.prlxTimingFun); }; // Setting parallax properties // Setting parallax properties /** * @param {?} speedVal * @return {?} */ ParallaxScrollDirective.prototype.setParallaxSpeed = // Setting parallax properties /** * @param {?} speedVal * @return {?} */ function (speedVal) { /** @type {?} */ var propName = 'parallaxSpeed'; this.validateParallaxSpeed(speedVal, propName, 'number') && (this._parallaxSpeedVal = speedVal); }; /** * @param {?} smoothnessVal * @return {?} */ ParallaxScrollDirective.prototype.setParallaxSmoothness = /** * @param {?} smoothnessVal * @return {?} */ function (smoothnessVal) { /** @type {?} */ var propName = 'parallaxSmoothness'; this.validateParallaxSmoothness(smoothnessVal, propName, 'number') && (this._parallaxSmoothnessVal = smoothnessVal); }; /** * @param {?} directionVal * @return {?} */ ParallaxScrollDirective.prototype.setParallaxDirection = /** * @param {?} directionVal * @return {?} */ function (directionVal) { /** @type {?} */ var propName = 'parallaxDirection'; directionVal && this.isTypeOf(directionVal, 'string', propName) && directionVal === 'reverse' && (this._parallaxSpeedVal *= -1); }; /** * @param {?} timingFun * @return {?} */ ParallaxScrollDirective.prototype.setParallaxTimingFun = /** * @param {?} timingFun * @return {?} */ function (timingFun) { /** @type {?} */ var propName = 'parallaxTimingFunction'; timingFun && this.isTypeOf(timingFun, 'string', propName) && (this._parallaxTimingFunVal = timingFun); }; /** * @param {?} throttleTime * @return {?} */ ParallaxScrollDirective.prototype.setParallaxThrottleTime = /** * @param {?} throttleTime * @return {?} */ function (throttleTime) { /** @type {?} */ var propName = 'parallaxThrottleTime'; throttleTime && this.isTypeOf(throttleTime, 'number', propName) && (this._parallaxThrottleTime = throttleTime); }; Object.defineProperty(ParallaxScrollDirective.prototype, "prlxSpeed", { // Getters for parallax options get: // Getters for parallax options /** * @return {?} */ function () { return this._parallaxSpeedVal; }, enumerable: true, configurable: true }); Object.defineProperty(ParallaxScrollDirective.prototype, "prlxSmoothness", { get: /** * @return {?} */ function () { return this._parallaxSmoothnessVal; }, enumerable: true, configurable: true }); Object.defineProperty(ParallaxScrollDirective.prototype, "prlxTimingFun", { get: /** * @return {?} */ function () { return this._parallaxTimingFunVal; }, enumerable: true, configurable: true }); Object.defineProperty(ParallaxScrollDirective.prototype, "prlxThrottleTime", { get: /** * @return {?} */ function () { return this._parallaxThrottleTime; }, enumerable: true, configurable: true }); // Validation functions // Validation functions /** * @param {?} value * @param {?} propName * @return {?} */ ParallaxScrollDirective.prototype.isProvided = // Validation functions /** * @param {?} value * @param {?} propName * @return {?} */ function (value, propName) { /** @type {?} */ var isNotProvided = value == null || value === ''; if (isNotProvided && isDevMode()) { throw new Error(this.directiveName + ": @Input [" + propName + "] is required, but was not provided"); } return true; }; /** * @param {?} value * @param {?} requiredType * @param {?} propName * @return {?} */ ParallaxScrollDirective.prototype.isTypeOf = /** * @param {?} value * @param {?} requiredType * @param {?} propName * @return {?} */ function (value, requiredType, propName) { /** @type {?} */ var isRequiredType = typeof value === requiredType; if (!isRequiredType && isDevMode()) { throw new Error(this.directiveName + ": @Input [" + propName + "] is expected to be of type '" + requiredType + "', but type '" + typeof value + "' was provided"); } return true; }; /** * @param {?} value * @param {?} propName * @return {?} */ ParallaxScrollDirective.prototype.isPositive = /** * @param {?} value * @param {?} propName * @return {?} */ function (value, propName) { /** @type {?} */ var isRequiredType = typeof value === 'number'; /** @type {?} */ var isValid = value >= 0; if (isRequiredType && !isValid && isDevMode()) { throw new Error(this.directiveName + ": @Input [" + propName + "] is expected to be positive value, but negative '" + value + "' value was provided"); } return true; }; // Executing validation functions to validate parallax speed // Executing validation functions to validate parallax speed /** * @param {?} value * @param {?} propName * @param {?} requiredType * @return {?} */ ParallaxScrollDirective.prototype.validateParallaxSpeed = // Executing validation functions to validate parallax speed /** * @param {?} value * @param {?} propName * @param {?} requiredType * @return {?} */ function (value, propName, requiredType) { return (this.isProvided(value, propName) && this.isTypeOf(value, requiredType, propName) && this.isPositive(value, propName)); }; // Executing validation functions to validate parallax smoothness // Executing validation functions to validate parallax smoothness /** * @param {?} value * @param {?} propName * @param {?} requiredType * @return {?} */ ParallaxScrollDirective.prototype.validateParallaxSmoothness = // Executing validation functions to validate parallax smoothness /** * @param {?} value * @param {?} propName * @param {?} requiredType * @return {?} */ function (value, propName, requiredType) { return (this.isProvided(value, propName) && this.isTypeOf(value, requiredType, propName) && this.isPositive(value, propName)); }; ParallaxScrollDirective.decorators = [ { type: Directive, args: [{ selector: '[ngxParallaxScroll]' },] } ]; /** @nocollapse */ ParallaxScrollDirective.ctorParameters = function () { return [ { type: ElementRef }, { type: Renderer2 }, { type: Object, decorators: [{ type: Inject, args: [PLATFORM_ID,] }] } ]; }; ParallaxScrollDirective.propDecorators = { config: [{ type: Input }], parallaxSpeed: [{ type: Input }], parallaxSmoothness: [{ type: Input }], parallaxDirection: [{ type: Input }], parallaxTimingFunction: [{ type: Input }], parallaxThrottleTime: [{ type: Input }] }; return ParallaxScrollDirective; }()); export { ParallaxScrollDirective }; if (false) { /** * @type {?} * @private */ ParallaxScrollDirective.prototype.config; /** @type {?} */ ParallaxScrollDirective.prototype.parallaxSpeed; /** @type {?} */ ParallaxScrollDirective.prototype.parallaxSmoothness; /** @type {?} */ ParallaxScrollDirective.prototype.parallaxDirection; /** @type {?} */ ParallaxScrollDirective.prototype.parallaxTimingFunction; /** @type {?} */ ParallaxScrollDirective.prototype.parallaxThrottleTime; /** * @type {?} * @private */ ParallaxScrollDirective.prototype._parallaxSpeedVal; /** * @type {?} * @private */ ParallaxScrollDirective.prototype._parallaxSmoothnessVal; /** * @type {?} * @private */ ParallaxScrollDirective.prototype._parallaxTimingFunVal; /** * @type {?} * @private */ ParallaxScrollDirective.prototype._parallaxThrottleTime; /** @type {?} */ ParallaxScrollDirective.prototype.scrollSubscribtion; /** @type {?} */ ParallaxScrollDirective.prototype.isPrxElInViewport; /** @type {?} */ ParallaxScrollDirective.prototype.directiveName; /** @type {?} */ ParallaxScrollDirective.prototype.elem; /** @type {?} */ ParallaxScrollDirective.prototype.renderer; /** * @type {?} * @private */ ParallaxScrollDirective.prototype.platformId; } //# 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{\n  Directive,\n  ElementRef,\n  Renderer2,\n  Input,\n  OnInit,\n  AfterViewInit,\n  OnChanges,\n  SimpleChanges,\n  OnDestroy,\n  Inject,\n  PLATFORM_ID\n} from '@angular/core';\nimport { isDevMode } from '@angular/core';\nimport { isPlatformServer } from '@angular/common';\nimport { fromEvent, Subscription } from 'rxjs';\nimport { throttleTime } from 'rxjs/operators';\nimport { IParallaxScrollConfig, ParallaxDirection } from './ngx-parallax.interfaces';\n\n@Directive({\n  selector: '[ngxParallaxScroll]'\n})\nexport class ParallaxScrollDirective implements OnInit, OnChanges, AfterViewInit, OnDestroy {\n  // Required input from config object or input props\n  @Input() private config?: IParallaxScrollConfig;\n\n  @Input()\n  parallaxSpeed: number;\n\n  @Input()\n  parallaxSmoothness: number;\n\n  @Input()\n  parallaxDirection?: ParallaxDirection;\n\n  @Input()\n  parallaxTimingFunction?: string;\n\n  @Input()\n  parallaxThrottleTime?: number;\n\n  // Setting the values after validation\n  private _parallaxSpeedVal: number;\n  private _parallaxSmoothnessVal: number;\n  private _parallaxTimingFunVal: string = 'linear';\n  private _parallaxThrottleTime: number = 0;\n\n  scrollSubscribtion: Subscription;\n  isPrxElInViewport: boolean;\n  directiveName: string = this.constructor.name;\n\n  constructor(\n    public elem: ElementRef,\n    public renderer: Renderer2,\n    @Inject(PLATFORM_ID) private platformId: Object\n  ) {}\n\n  ngOnInit() {\n    if (isPlatformServer(this.platformId)) return;\n\n    // Initing parallax effect and setting element styles\n    this.initParallax();\n    this.setParallaxElTransform();\n    this.setParallaxTransition();\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    // Setting parallax options from config object or input props\n    const prlxSpeed =\n      (changes['parallaxSpeed'] && changes['parallaxSpeed'].currentValue) ||\n      (changes['config'] && changes['config'].currentValue.parallaxSpeed);\n\n    const prlxSmoothness =\n      (changes['parallaxSmoothness'] && changes['parallaxSmoothness'].currentValue) ||\n      (changes['config'] && changes['config'].currentValue.parallaxSmoothness);\n\n    const prlxDirection =\n      (changes['parallaxDirection'] && changes['parallaxDirection'].currentValue) ||\n      (changes['config'] && changes['config'].currentValue.parallaxDirection);\n\n    const prlxTimingFunction =\n      (changes['parallaxTimingFunction'] && changes['parallaxTimingFunction'].currentValue) ||\n      (changes['config'] && changes['config'].currentValue.parallaxTimingFunction);\n\n    const prlxThrottleTime =\n      (changes['parallaxThrottleTime'] && changes['parallaxThrottleTime'].currentValue) ||\n      (changes['config'] && changes['config'].currentValue.parallaxThrottleTime);\n\n    this.setParallaxSpeed(prlxSpeed);\n    this.setParallaxSmoothness(prlxSmoothness);\n    this.setParallaxDirection(prlxDirection);\n    this.setParallaxTimingFun(prlxTimingFunction);\n    this.setParallaxThrottleTime(prlxThrottleTime);\n  }\n\n  ngAfterViewInit() {}\n\n  ngOnDestroy() {\n    this.scrollSubscribtion && this.scrollSubscribtion.unsubscribe();\n  }\n\n  // Setting parallax effect and setting element styles\n  initParallax(): void {\n    this.scrollSubscribtion = fromEvent(window, 'scroll')\n      .pipe(throttleTime(this.prlxThrottleTime))\n      .subscribe(() => {\n        this.setParallaxElTransform();\n      });\n  }\n\n  // Setting parallax speed effect styles\n  setParallaxElTransform(): void {\n    let scrolled = window.pageYOffset;\n    this.renderer.setStyle(\n      this.elem.nativeElement,\n      'transform',\n      `translateY(${scrolled * this.prlxSpeed}px) translateZ(0)`\n    );\n  }\n\n  // Setting parallax smooth effect styles, based on CSS animation-timing-function\n  setParallaxTransition() {\n    this.renderer.setStyle(\n      this.elem.nativeElement,\n      'transition',\n      `transform ${this.prlxSmoothness}s ${this.prlxTimingFun}`\n    );\n  }\n\n  // Setting parallax properties\n  setParallaxSpeed(speedVal: any): void {\n    const propName = 'parallaxSpeed';\n    this.validateParallaxSpeed(speedVal, propName, 'number') && (this._parallaxSpeedVal = speedVal);\n  }\n\n  setParallaxSmoothness(smoothnessVal: any): void {\n    const propName = 'parallaxSmoothness';\n    this.validateParallaxSmoothness(smoothnessVal, propName, 'number') &&\n      (this._parallaxSmoothnessVal = smoothnessVal);\n  }\n\n  setParallaxDirection(directionVal: any): void {\n    const propName = 'parallaxDirection';\n    directionVal &&\n      this.isTypeOf(directionVal, 'string', propName) &&\n      directionVal === 'reverse' &&\n      (this._parallaxSpeedVal *= -1);\n  }\n\n  setParallaxTimingFun(timingFun: any): void {\n    const propName = 'parallaxTimingFunction';\n    timingFun &&\n      this.isTypeOf(timingFun, 'string', propName) &&\n      (this._parallaxTimingFunVal = timingFun);\n  }\n\n  setParallaxThrottleTime(throttleTime: any): void {\n    const propName = 'parallaxThrottleTime';\n    throttleTime &&\n      this.isTypeOf(throttleTime, 'number', propName) &&\n      (this._parallaxThrottleTime = throttleTime);\n  }\n\n  // Getters for parallax options\n  get prlxSpeed() {\n    return this._parallaxSpeedVal;\n  }\n\n  get prlxSmoothness() {\n    return this._parallaxSmoothnessVal;\n  }\n\n  get prlxTimingFun() {\n    return this._parallaxTimingFunVal;\n  }\n\n  get prlxThrottleTime() {\n    return this._parallaxThrottleTime;\n  }\n\n  // Validation functions\n  isProvided(value: any, propName: string): boolean {\n    const isNotProvided = value == null || value === '';\n    if (isNotProvided && isDevMode()) {\n      throw new Error(\n        `${this.directiveName}: @Input [${propName}] is required, but was not provided`\n      );\n    }\n    return true;\n  }\n\n  isTypeOf(value: any, requiredType: 'string' | 'number' | 'boolean', propName: string): boolean {\n    const isRequiredType = typeof value === requiredType;\n    if (!isRequiredType && isDevMode()) {\n      throw new Error(\n        `${\n          this.directiveName\n        }: @Input [${propName}] is expected to be of type '${requiredType}', but type '${typeof value}' was provided`\n      );\n    }\n    return true;\n  }\n\n  isPositive(value: number, propName: string): boolean {\n    const isRequiredType = typeof value === 'number';\n    const isValid = value >= 0;\n\n    if (isRequiredType && !isValid && isDevMode()) {\n      throw new Error(\n        `${\n          this.directiveName\n        }: @Input [${propName}] is expected to be positive value, but negative '${value}' value was provided`\n      );\n    }\n    return true;\n  }\n\n  // Executing validation functions to validate parallax speed\n  validateParallaxSpeed(\n    value: any,\n    propName: string,\n    requiredType: 'string' | 'number' | 'boolean'\n  ) {\n    return (\n      this.isProvided(value, propName) &&\n      this.isTypeOf(value, requiredType, propName) &&\n      this.isPositive(value, propName)\n    );\n  }\n\n  // Executing validation functions to validate parallax smoothness\n  validateParallaxSmoothness(\n    value: any,\n    propName: string,\n    requiredType: 'string' | 'number' | 'boolean'\n  ) {\n    return (\n      this.isProvided(value, propName) &&\n      this.isTypeOf(value, requiredType, propName) &&\n      this.isPositive(value, propName)\n    );\n  }\n}\n"]}