ngx-carousel-ease
Version:
ngx-carousel-ease is a versatile Angular library providing a feature-rich, simple, and performant carousel component. This library supports infinite and responsive mode, mouse and touch event. Attention has been put to accessibility, performance, and frie
271 lines • 38.7 kB
JavaScript
import { CommunSlider } from './communSlider';
export class FiniteSlider extends CommunSlider {
constructor(carousel, responsive, slideToScroll, LIMIT_AUTO_SLIDE, strechingLimit, autoSlide, animationTimingFn, animationTimingMs, enableMouseDrag, enableTouch, autoPlay, autoPlayInterval, autoPlayAtStart, playDirection, autoplaySlideToScroll, carouselService, cd) {
super(carousel, responsive, slideToScroll, LIMIT_AUTO_SLIDE, strechingLimit, autoSlide, animationTimingFn, animationTimingMs, enableMouseDrag, enableTouch, autoPlay, autoPlayInterval, autoPlayAtStart, playDirection, autoplaySlideToScroll, carouselService, cd);
this.initProperties();
this.updateProperties();
}
initProperties() {
this.defineAutoPlayDirection();
super.initProperties();
this.disableAutoPlayBtn();
}
/**
* In finite carousel, clear autoPlay interval if limits are reached.
*/
disableAutoPlayBtn() {
if (!this.autoPlay)
return;
this.playButtonDisabled.set(false);
// start
if (this.currentSlide() === 0 &&
this.playDirection === 'rtl' &&
this.currentTranslation() === 0) {
this.playButtonDisabled.set(true);
this.playActive.set(false);
clearInterval(this.autoInterval);
}
// end
if (this.currentSlide() === this.lastWindow &&
this.playDirection === 'ltr' &&
this.currentTranslation() <= -this.carousel.maxScrollableContent()) {
this.playButtonDisabled.set(true);
this.playActive.set(false);
clearInterval(this.autoInterval);
}
if (this.carousel.numberDots() === 1)
this.playButtonDisabled.set(true);
}
/**
* Fired at drag start
* Instantiate property of the starting drag point on the X axis. Used to compute the translation.
* Disabling the transition while applying the transformation because of the attached animation.
*/
dragStart(event) {
super.dragStart(event);
this.disableAutoPlayBtn();
}
/**
* Fired at drag end
* If limits reached (start or end), put back to the current slide. Updates previous translation.
*/
dragStop(event) {
if (this.currentEventIsDisabled(event))
return;
this.dragging.set(false);
this.previousTranslation = this.currentTranslation();
this.autoSlider();
this.disableAutoPlayBtn();
const limit = this.currentTranslation() > 0 ||
-this.currentTranslation() > this.lastWindowTranslation;
if (limit) {
this.computeTransformation(this.currentSlide());
}
}
/**
* Fired at dragging
* Compute the translation, change the slide number, update the direction.
*/
dragMove(event) {
if (this.currentEventIsDisabled(event))
return;
if (!this.dragging())
return;
this.currentX =
event instanceof MouseEvent ? event.pageX : event.changedTouches[0].pageX;
this.setDirection();
this.previousX = this.currentX;
this.positionChange = this.currentX - this.startX;
this.currentTranslation.set(this.positionChange + this.previousTranslation);
// Current translation exceeding start or end limits
if (this.strechingEffect())
return;
this.applyTranslation(this.currentTranslation());
this.modifyCurrentSlide();
}
strechingEffect() {
return ((this.currentTranslation() > this.strechingLimit &&
this.currentSlide() === 0) ||
this.currentTranslation() <
-this.carousel.maxScrollableContent() - this.strechingLimit);
}
/**
* Responsible for changing slide number and updating the limits.
* In finite mode, if all slides visible on one window or end of carousel, early return to not trigger change event.
*/
modifyCurrentSlide() {
if (this.endOfCarousel())
return;
if (-this.currentTranslation() < this.prevLimit) {
this.changeSlideNumber(-1);
this.decreaseLimits();
}
else if (-this.currentTranslation() >= this.nextLimit) {
this.changeSlideNumber(1);
this.increaseLimits();
}
}
endOfCarousel() {
return (this.carousel.numberDots() === 1 ||
(this.currentSlide() === this.lastWindow && this.direction === 'right'));
}
/**
* Auto slide card if option enabled, applied on both directions.
* Prevents auto slide on limits in finite mode (if streching < limit auto slide).
* If only one slide is displayed (slideToShow === 1), the width of the slide corresponds to the window's width (a dot). Hence, taking the min between the two.
* In non responsive and non infinite, there is possibly an offset of the current limit.
*/
autoSlider() {
if (!this.autoSlide)
return;
if (this.currentTranslation() > 0 ||
-this.currentTranslation() > this.lastWindowTranslation) {
return;
}
const referenceWidth = Math.min(this.carousel.slideWidth, this.carousel.slideMaxWidth || Infinity);
let currentLimit = this.prevLimit + this.carousel.slideWidthWithGap;
if (!this.responsive && this.currentSlide() > this.lastWindow - 1) {
currentLimit = this.lastWindowTranslation;
}
// previousTranslation always a negative number, currentLimit always positive
const currentPositionChange = this.previousTranslation + currentLimit;
const moveComparedToSlide = (currentPositionChange / referenceWidth) * 100;
if (moveComparedToSlide < -this.LIMIT_AUTO_SLIDE ||
moveComparedToSlide > this.LIMIT_AUTO_SLIDE) {
if (moveComparedToSlide > this.LIMIT_AUTO_SLIDE) {
this.changeSlideNumber(-1);
this.decreaseLimits();
}
else {
this.changeSlideNumber(1);
this.increaseLimits();
}
}
this.computeTransformation(this.accumulatedSlide);
}
/**
* Decrease limit (movement to the left)
* Exception: if not responsive (card offset) and finite carousel, the next limit is at the maximum (the end of the carousel)
*/
decreaseLimits() {
super.decreaseLimits();
if (!this.responsive && this.currentSlide() >= this.lastWindow - 1) {
this.nextLimit = this.lastWindowTranslation;
}
this.nextLimit = Math.floor(this.nextLimit);
}
/**
* Increase limit on basis of previous computed limits (movement to the right)
* Schema: || previous | current || next
* Exception: if not responsive (card offset) and finite carousel, the next limit is at the maximum (the end of the carousel)
*/
increaseLimits() {
super.increaseLimits();
if (!this.responsive && this.currentSlide() >= this.lastWindow - 1) {
this.nextLimit = this.lastWindowTranslation;
if (this.currentSlide() === this.lastWindow) {
// only update previous limit if last slide reached
this.prevLimit = Math.floor(this.nextLimit - this.invisibleOffsetCardNotResponsive);
}
}
}
/**
* Previous button navigation
*/
prev(slides = this.slideToScroll) {
this.direction = 'left';
this.changeSlideNumber(-slides);
this.changePrevAndNextLimits(this.accumulatedSlide);
this.computeTransformation(this.accumulatedSlide);
this.disableAutoPlayBtn();
this.relaunchAutoPlay();
}
/**
* Relaunch autoPlay if not disabled.
* Restart only if started (playActive). Play button disabled when limits reached (finite carousel).
*/
relaunchAutoPlay() {
if (!this.playButtonDisabled() && this.playActive()) {
clearInterval(this.autoInterval);
this.launchAutoPlay();
}
}
defineAutoPlayDirection() {
if (this.playDirection === 'ltr') {
this.directionAutoPlay = this.next.bind(this);
}
else {
this.directionAutoPlay = this.prev.bind(this);
}
}
/**
* Next button navigation
*/
next(slides = this.slideToScroll) {
this.direction = 'right';
this.changeSlideNumber(slides);
this.changePrevAndNextLimits(this.accumulatedSlide);
this.computeTransformation(this.accumulatedSlide);
this.disableAutoPlayBtn();
this.relaunchAutoPlay();
}
/**
* Navigation with bullet points
* Update values accordingly.
*/
goTo(bullet) {
const slideHasChanged = this.currentSlide() !== bullet;
this.direction = this.currentSlide() < bullet ? 'right' : 'left';
this.currentSlide.set(bullet);
this.fireSlideChangeEvent(slideHasChanged, this.currentSlide());
this.disableAutoPlayBtn();
this.relaunchAutoPlay();
this.accumulatedSlide = this.currentSlide();
this.changePrevAndNextLimits(bullet);
this.computeTransformation(bullet);
}
/**
* Exception: if only one window (numberDots === 1), update the accumulatedSlide to let the transformation occurs, but currentSlide should stay at 0.
*/
changeSlideNumber(step) {
const slideNumberBeforeChange = this.currentSlide();
this.finiteChangeSlideNumber(step);
if (this.carousel.numberDots() === 1) {
this.currentSlide.set(0);
}
const current = this.carousel.numberDots() > 1
? this.currentSlide()
: this.accumulatedSlide;
const slideHasChanged = slideNumberBeforeChange !== this.currentSlide();
this.fireSlideChangeEvent(slideHasChanged, current);
}
finiteChangeSlideNumber(step) {
this.currentSlide.update((slide) => slide + step);
if (this.currentSlide() > this.lastWindow) {
this.currentSlide.set(this.lastWindow);
}
else if (this.currentSlide() < 0) {
this.currentSlide.set(0);
}
this.accumulatedSlide = this.currentSlide();
}
/**
* Compute transformation that will be applied on basis of the provided slide number
* Exception: if not responsive (card offset) and finite carousel, the next limit is the end of the carousel
*/
computeTransformation(slide) {
let transformation = slide * this.carousel.slideWidthWithGap;
if (!this.responsive &&
slide >= this.lastWindow - 1 &&
this.carousel.numberDots() > 1) {
this.nextLimit = this.lastWindowTranslation;
if (slide === this.lastWindow) {
// if last window, go to maximum & update prev limit
transformation = this.lastWindowTranslation;
this.prevLimit = Math.floor(this.nextLimit - this.invisibleOffsetCardNotResponsive);
}
}
this.applyTransformation(transformation);
}
}
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{ ChangeDetectorRef } from '@angular/core';\r\nimport { Carousel } from './carousel';\r\nimport { CarouselService } from './carousel.service';\r\nimport { CommunSlider } from './communSlider';\r\n\r\nexport class FiniteSlider extends CommunSlider {\r\n  constructor(\r\n    carousel: Carousel,\r\n    responsive: boolean,\r\n    slideToScroll: number,\r\n    LIMIT_AUTO_SLIDE: number,\r\n    strechingLimit: number,\r\n    autoSlide: boolean,\r\n    animationTimingFn: string,\r\n    animationTimingMs: number,\r\n    enableMouseDrag: boolean,\r\n    enableTouch: boolean,\r\n    autoPlay: boolean,\r\n    autoPlayInterval: number,\r\n    autoPlayAtStart: boolean,\r\n    playDirection: string,\r\n    autoplaySlideToScroll: number,\r\n    carouselService: CarouselService,\r\n    cd: ChangeDetectorRef\r\n  ) {\r\n    super(\r\n      carousel,\r\n      responsive,\r\n      slideToScroll,\r\n      LIMIT_AUTO_SLIDE,\r\n      strechingLimit,\r\n      autoSlide,\r\n      animationTimingFn,\r\n      animationTimingMs,\r\n      enableMouseDrag,\r\n      enableTouch,\r\n      autoPlay,\r\n      autoPlayInterval,\r\n      autoPlayAtStart,\r\n      playDirection,\r\n      autoplaySlideToScroll,\r\n      carouselService,\r\n      cd\r\n    );\r\n    this.initProperties();\r\n    this.updateProperties();\r\n  }\r\n\r\n  override initProperties() {\r\n    this.defineAutoPlayDirection();\r\n    super.initProperties();\r\n    this.disableAutoPlayBtn();\r\n  }\r\n\r\n  /**\r\n   * In finite carousel, clear autoPlay interval if limits are reached.\r\n   */\r\n  disableAutoPlayBtn() {\r\n    if (!this.autoPlay) return;\r\n    this.playButtonDisabled.set(false);\r\n\r\n    // start\r\n    if (\r\n      this.currentSlide() === 0 &&\r\n      this.playDirection === 'rtl' &&\r\n      this.currentTranslation() === 0\r\n    ) {\r\n      this.playButtonDisabled.set(true);\r\n      this.playActive.set(false);\r\n      clearInterval(this.autoInterval);\r\n    }\r\n\r\n    // end\r\n    if (\r\n      this.currentSlide() === this.lastWindow &&\r\n      this.playDirection === 'ltr' &&\r\n      this.currentTranslation() <= -this.carousel.maxScrollableContent()\r\n    ) {\r\n      this.playButtonDisabled.set(true);\r\n      this.playActive.set(false);\r\n      clearInterval(this.autoInterval);\r\n    }\r\n\r\n    if (this.carousel.numberDots() === 1) this.playButtonDisabled.set(true);\r\n  }\r\n\r\n  /**\r\n   * Fired at drag start\r\n   * Instantiate property of the starting drag point on the X axis. Used to compute the translation.\r\n   * Disabling the transition while applying the transformation because of the attached animation.\r\n   */\r\n  override dragStart(event: MouseEvent | TouchEvent) {\r\n    super.dragStart(event);\r\n    this.disableAutoPlayBtn();\r\n  }\r\n\r\n  /**\r\n   * Fired at drag end\r\n   * If limits reached (start or end), put back to the current slide. Updates previous translation.\r\n   */\r\n  dragStop(event: MouseEvent | TouchEvent) {\r\n    if (this.currentEventIsDisabled(event)) return;\r\n    this.dragging.set(false);\r\n    this.previousTranslation = this.currentTranslation();\r\n\r\n    this.autoSlider();\r\n    this.disableAutoPlayBtn();\r\n\r\n    const limit =\r\n      this.currentTranslation() > 0 ||\r\n      -this.currentTranslation() > this.lastWindowTranslation;\r\n\r\n    if (limit) {\r\n      this.computeTransformation(this.currentSlide());\r\n    }\r\n  }\r\n\r\n  /**\r\n   * Fired at dragging\r\n   * Compute the translation, change the slide number, update the direction.\r\n   */\r\n  dragMove(event: MouseEvent | TouchEvent) {\r\n    if (this.currentEventIsDisabled(event)) return;\r\n    if (!this.dragging()) return;\r\n\r\n    this.currentX =\r\n      event instanceof MouseEvent ? event.pageX : event.changedTouches[0].pageX;\r\n\r\n    this.setDirection();\r\n    this.previousX = this.currentX;\r\n\r\n    this.positionChange = this.currentX - this.startX;\r\n    this.currentTranslation.set(this.positionChange + this.previousTranslation);\r\n\r\n    // Current translation exceeding start or end limits\r\n    if (this.strechingEffect()) return;\r\n\r\n    this.applyTranslation(this.currentTranslation());\r\n    this.modifyCurrentSlide();\r\n  }\r\n\r\n  strechingEffect() {\r\n    return (\r\n      (this.currentTranslation() > this.strechingLimit &&\r\n        this.currentSlide() === 0) ||\r\n      this.currentTranslation() <\r\n        -this.carousel.maxScrollableContent() - this.strechingLimit\r\n    );\r\n  }\r\n\r\n  /**\r\n   * Responsible for changing slide number and updating the limits.\r\n   * In finite mode, if all slides visible on one window or end of carousel, early return to not trigger change event.\r\n   */\r\n  modifyCurrentSlide() {\r\n    if (this.endOfCarousel()) return;\r\n\r\n    if (-this.currentTranslation() < this.prevLimit) {\r\n      this.changeSlideNumber(-1);\r\n      this.decreaseLimits();\r\n    } else if (-this.currentTranslation() >= this.nextLimit) {\r\n      this.changeSlideNumber(1);\r\n      this.increaseLimits();\r\n    }\r\n  }\r\n\r\n  endOfCarousel() {\r\n    return (\r\n      this.carousel.numberDots() === 1 ||\r\n      (this.currentSlide() === this.lastWindow && this.direction === 'right')\r\n    );\r\n  }\r\n\r\n  /**\r\n   * Auto slide card if option enabled, applied on both directions.\r\n   * Prevents auto slide on limits in finite mode (if streching < limit auto slide).\r\n   * If only one slide is displayed (slideToShow === 1), the width of the slide corresponds to the window's width (a dot). Hence, taking the min between the two.\r\n   * In non responsive and non infinite, there is possibly an offset of the current limit.\r\n   */\r\n  autoSlider() {\r\n    if (!this.autoSlide) return;\r\n    if (\r\n      this.currentTranslation() > 0 ||\r\n      -this.currentTranslation() > this.lastWindowTranslation\r\n    ) {\r\n      return;\r\n    }\r\n\r\n    const referenceWidth = Math.min(\r\n      this.carousel.slideWidth,\r\n      this.carousel.slideMaxWidth || Infinity\r\n    );\r\n    let currentLimit = this.prevLimit + this.carousel.slideWidthWithGap;\r\n\r\n    if (!this.responsive && this.currentSlide() > this.lastWindow - 1) {\r\n      currentLimit = this.lastWindowTranslation;\r\n    }\r\n\r\n    // previousTranslation always a negative number, currentLimit always positive\r\n    const currentPositionChange = this.previousTranslation + currentLimit;\r\n    const moveComparedToSlide = (currentPositionChange / referenceWidth) * 100;\r\n\r\n    if (\r\n      moveComparedToSlide < -this.LIMIT_AUTO_SLIDE ||\r\n      moveComparedToSlide > this.LIMIT_AUTO_SLIDE\r\n    ) {\r\n      if (moveComparedToSlide > this.LIMIT_AUTO_SLIDE) {\r\n        this.changeSlideNumber(-1);\r\n        this.decreaseLimits();\r\n      } else {\r\n        this.changeSlideNumber(1);\r\n        this.increaseLimits();\r\n      }\r\n    }\r\n\r\n    this.computeTransformation(this.accumulatedSlide);\r\n  }\r\n\r\n  /**\r\n   * Decrease limit (movement to the left)\r\n   * Exception: if not responsive (card offset) and finite carousel, the next limit is at the maximum (the end of the carousel)\r\n   */\r\n  override decreaseLimits() {\r\n    super.decreaseLimits();\r\n\r\n    if (!this.responsive && this.currentSlide() >= this.lastWindow - 1) {\r\n      this.nextLimit = this.lastWindowTranslation;\r\n    }\r\n\r\n    this.nextLimit = Math.floor(this.nextLimit);\r\n  }\r\n\r\n  /**\r\n   * Increase limit on basis of previous computed limits (movement to the right)\r\n   * Schema: || previous | current || next\r\n   * Exception: if not responsive (card offset) and finite carousel, the next limit is at the maximum (the end of the carousel)\r\n   */\r\n  override increaseLimits() {\r\n    super.increaseLimits();\r\n\r\n    if (!this.responsive && this.currentSlide() >= this.lastWindow - 1) {\r\n      this.nextLimit = this.lastWindowTranslation;\r\n\r\n      if (this.currentSlide() === this.lastWindow) {\r\n        // only update previous limit if last slide reached\r\n        this.prevLimit = Math.floor(\r\n          this.nextLimit - this.invisibleOffsetCardNotResponsive\r\n        );\r\n      }\r\n    }\r\n  }\r\n\r\n  /**\r\n   * Previous button navigation\r\n   */\r\n  prev(slides = this.slideToScroll) {\r\n    this.direction = 'left';\r\n\r\n    this.changeSlideNumber(-slides);\r\n    this.changePrevAndNextLimits(this.accumulatedSlide);\r\n    this.computeTransformation(this.accumulatedSlide);\r\n    this.disableAutoPlayBtn();\r\n    this.relaunchAutoPlay();\r\n  }\r\n\r\n  /**\r\n   * Relaunch autoPlay if not disabled.\r\n   * Restart only if started (playActive). Play button disabled when limits reached (finite carousel).\r\n   */\r\n  relaunchAutoPlay() {\r\n    if (!this.playButtonDisabled() && this.playActive()) {\r\n      clearInterval(this.autoInterval);\r\n      this.launchAutoPlay();\r\n    }\r\n  }\r\n\r\n  defineAutoPlayDirection() {\r\n    if (this.playDirection === 'ltr') {\r\n      this.directionAutoPlay = this.next.bind(this);\r\n    } else {\r\n      this.directionAutoPlay = this.prev.bind(this);\r\n    }\r\n  }\r\n\r\n  /**\r\n   * Next button navigation\r\n   */\r\n  next(slides = this.slideToScroll) {\r\n    this.direction = 'right';\r\n\r\n    this.changeSlideNumber(slides);\r\n    this.changePrevAndNextLimits(this.accumulatedSlide);\r\n    this.computeTransformation(this.accumulatedSlide);\r\n    this.disableAutoPlayBtn();\r\n    this.relaunchAutoPlay();\r\n  }\r\n\r\n  /**\r\n   * Navigation with bullet points\r\n   * Update values accordingly.\r\n   */\r\n  goTo(bullet: number) {\r\n    const slideHasChanged = this.currentSlide() !== bullet;\r\n    this.direction = this.currentSlide() < bullet ? 'right' : 'left';\r\n\r\n    this.currentSlide.set(bullet);\r\n    this.fireSlideChangeEvent(slideHasChanged, this.currentSlide());\r\n\r\n    this.disableAutoPlayBtn();\r\n    this.relaunchAutoPlay();\r\n\r\n    this.accumulatedSlide = this.currentSlide();\r\n    this.changePrevAndNextLimits(bullet);\r\n    this.computeTransformation(bullet);\r\n  }\r\n\r\n  /**\r\n   * Exception: if only one window (numberDots === 1), update the accumulatedSlide to let the transformation occurs, but currentSlide should stay at 0.\r\n   */\r\n  changeSlideNumber(step: number) {\r\n    const slideNumberBeforeChange = this.currentSlide();\r\n\r\n    this.finiteChangeSlideNumber(step);\r\n\r\n    if (this.carousel.numberDots() === 1) {\r\n      this.currentSlide.set(0);\r\n    }\r\n\r\n    const current =\r\n      this.carousel.numberDots() > 1\r\n        ? this.currentSlide()\r\n        : this.accumulatedSlide;\r\n\r\n    const slideHasChanged = slideNumberBeforeChange !== this.currentSlide();\r\n\r\n    this.fireSlideChangeEvent(slideHasChanged, current);\r\n  }\r\n\r\n  finiteChangeSlideNumber(step: number) {\r\n    this.currentSlide.update((slide) => slide + step);\r\n\r\n    if (this.currentSlide() > this.lastWindow) {\r\n      this.currentSlide.set(this.lastWindow);\r\n    } else if (this.currentSlide() < 0) {\r\n      this.currentSlide.set(0);\r\n    }\r\n\r\n    this.accumulatedSlide = this.currentSlide();\r\n  }\r\n\r\n  /**\r\n   * Compute transformation that will be applied on basis of the provided slide number\r\n   * Exception: if not responsive (card offset) and finite carousel, the next limit is the end of the carousel\r\n   */\r\n  computeTransformation(slide: number) {\r\n    let transformation = slide * this.carousel.slideWidthWithGap;\r\n\r\n    if (\r\n      !this.responsive &&\r\n      slide >= this.lastWindow - 1 &&\r\n      this.carousel.numberDots() > 1\r\n    ) {\r\n      this.nextLimit = this.lastWindowTranslation;\r\n\r\n      if (slide === this.lastWindow) {\r\n        // if last window, go to maximum & update prev limit\r\n        transformation = this.lastWindowTranslation;\r\n        this.prevLimit = Math.floor(\r\n          this.nextLimit - this.invisibleOffsetCardNotResponsive\r\n        );\r\n      }\r\n    }\r\n\r\n    this.applyTransformation(transformation);\r\n  }\r\n}\r\n"]}