/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
// tslint:disable:max-file-line-count
/***
* pause (not yet supported) (?string='hover') - event group name which pauses
* the cycling of the carousel, if hover pauses on mouseenter and resumes on
* mouseleave keyboard (not yet supported) (?boolean=true) - if false
* carousel will not react to keyboard events
* note: swiping not yet supported
*/
/****
* Problems:
* 1) if we set an active slide via model changes, .active class remains on a
* current slide.
* 2) if we have only one slide, we shouldn't show prev/next nav buttons
* 3) if first or last slide is active and noWrap is true, there should be
* "disabled" class on the nav buttons.
* 4) default interval should be equal 5000
*/
import { Component, EventEmitter, Input, NgZone, Output } from '@angular/core';
import { isBs3, LinkedList } from 'ngx-bootstrap/utils';
import { CarouselConfig } from './carousel.config';
import { findLastIndex, chunkByNumber } from './utils';
/** @enum {number} */
const Direction = {
UNKNOWN: 0,
NEXT: 1,
PREV: 2,
};
export { Direction };
Direction[Direction.UNKNOWN] = 'UNKNOWN';
Direction[Direction.NEXT] = 'NEXT';
Direction[Direction.PREV] = 'PREV';
/**
* Base element to create carousel
*/
export class CarouselComponent {
/**
* @param {?} config
* @param {?} ngZone
*/
constructor(config, ngZone) {
this.ngZone = ngZone;
/* If `true` - carousel indicators indicate slides chunks
works ONLY if singleSlideOffset = FALSE */
this.indicatorsByChunk = false;
/* If value more then 1 — carousel works in multilist mode */
this.itemsPerSlide = 1;
/* If `true` — carousel shifts by one element. By default carousel shifts by number
of visible elements (itemsPerSlide field) */
this.singleSlideOffset = false;
/**
* Will be emitted when active slide has been changed. Part of two-way-bindable [(activeSlide)] property
*/
this.activeSlideChange = new EventEmitter(false);
/**
* Will be emitted when active slides has been changed in multilist mode
*/
this.slideRangeChange = new EventEmitter();
/* Index to start display slides from it */
this.startFromIndex = 0;
this._slides = new LinkedList();
this._currentVisibleSlidesIndex = 0;
this.destroyed = false;
this.getActive = (/**
* @param {?} slide
* @return {?}
*/
(slide) => slide.active);
this.makeSlidesConsistent = (/**
* @param {?} slides
* @return {?}
*/
(slides) => {
slides.forEach((/**
* @param {?} slide
* @param {?} index
* @return {?}
*/
(slide, index) => slide.item.order = index));
});
Object.assign(this, config);
}
/**
* Index of currently displayed slide(started for 0)
* @param {?} index
* @return {?}
*/
set activeSlide(index) {
if (this.multilist) {
return;
}
if (this._slides.length && index !== this._currentActiveSlide) {
this._select(index);
}
}
/**
* @return {?}
*/
get activeSlide() {
return this._currentActiveSlide;
}
/**
* Delay of item cycling in milliseconds. If false, carousel won't cycle
* automatically.
* @return {?}
*/
get interval() {
return this._interval;
}
/**
* @param {?} value
* @return {?}
*/
set interval(value) {
this._interval = value;
this.restartTimer();
}
/**
* @return {?}
*/
get slides() {
return this._slides.toArray();
}
/**
* @return {?}
*/
get isBs4() {
return !isBs3();
}
/**
* @return {?}
*/
ngAfterViewInit() {
setTimeout((/**
* @return {?}
*/
() => {
if (this.singleSlideOffset) {
this.indicatorsByChunk = false;
}
if (this.multilist) {
this._chunkedSlides = chunkByNumber(this.mapSlidesAndIndexes(), this.itemsPerSlide);
this.selectInitialSlides();
}
}), 0);
}
/**
* @return {?}
*/
ngOnDestroy() {
this.destroyed = true;
}
/**
* Adds new slide. If this slide is first in collection - set it as active
* and starts auto changing
* @param {?} slide
* @return {?}
*/
addSlide(slide) {
this._slides.add(slide);
if (this.multilist && this._slides.length <= this.itemsPerSlide) {
slide.active = true;
}
if (!this.multilist && this._slides.length === 1) {
this._currentActiveSlide = undefined;
this.activeSlide = 0;
this.play();
}
if (this.multilist && this._slides.length > this.itemsPerSlide) {
this.play();
}
}
/**
* Removes specified slide. If this slide is active - will roll to another
* slide
* @param {?} slide
* @return {?}
*/
removeSlide(slide) {
/** @type {?} */
const remIndex = this._slides.indexOf(slide);
if (this._currentActiveSlide === remIndex) {
// removing of active slide
/** @type {?} */
let nextSlideIndex = void 0;
if (this._slides.length > 1) {
// if this slide last - will roll to first slide, if noWrap flag is
// FALSE or to previous, if noWrap is TRUE in case, if this slide in
// middle of collection, index of next slide is same to removed
nextSlideIndex = !this.isLast(remIndex)
? remIndex
: this.noWrap ? remIndex - 1 : 0;
}
this._slides.remove(remIndex);
// prevents exception with changing some value after checking
setTimeout((/**
* @return {?}
*/
() => {
this._select(nextSlideIndex);
}), 0);
}
else {
this._slides.remove(remIndex);
/** @type {?} */
const currentSlideIndex = this.getCurrentSlideIndex();
setTimeout((/**
* @return {?}
*/
() => {
// after removing, need to actualize index of current active slide
this._currentActiveSlide = currentSlideIndex;
this.activeSlideChange.emit(this._currentActiveSlide);
}), 0);
}
}
/**
* @param {?=} force
* @return {?}
*/
nextSlideFromInterval(force = false) {
this.move(Direction.NEXT, force);
}
/**
* Rolling to next slide
* @param {?=} force
* @return {?}
*/
nextSlide(force = false) {
if (this.isPlaying) {
this.restartTimer();
}
this.move(Direction.NEXT, force);
}
/**
* Rolling to previous slide
* @param {?=} force
* @return {?}
*/
previousSlide(force = false) {
if (this.isPlaying) {
this.restartTimer();
}
this.move(Direction.PREV, force);
}
/**
* @return {?}
*/
getFirstVisibleIndex() {
return this.slides.findIndex(this.getActive);
}
/**
* @return {?}
*/
getLastVisibleIndex() {
return findLastIndex(this.slides, this.getActive);
}
/**
* @param {?} direction
* @param {?=} force
* @return {?}
*/
move(direction, force = false) {
/** @type {?} */
const firstVisibleIndex = this.getFirstVisibleIndex();
/** @type {?} */
const lastVisibleIndex = this.getLastVisibleIndex();
if (this.noWrap) {
if (direction === Direction.NEXT &&
this.isLast(lastVisibleIndex) ||
direction === Direction.PREV &&
firstVisibleIndex === 0) {
return;
}
}
if (!this.multilist) {
this.activeSlide = this.findNextSlideIndex(direction, force);
}
else {
this.moveMultilist(direction);
}
}
/**
* Swith slides by enter, space and arrows keys
* \@internal
* @param {?} event
* @return {?}
*/
keydownPress(event) {
// tslint:disable-next-line:deprecation
if (event.keyCode === 13 || event.key === 'Enter' || event.keyCode === 32 || event.key === 'Space') {
this.nextSlide();
event.preventDefault();
return;
}
// tslint:disable-next-line:deprecation
if (event.keyCode === 37 || event.key === 'LeftArrow') {
this.previousSlide();
return;
}
// tslint:disable-next-line:deprecation
if (event.keyCode === 39 || event.key === 'RightArrow') {
this.nextSlide();
return;
}
}
/**
* Play on mouse leave
* \@internal
* @return {?}
*/
onMouseLeave() {
if (!this.pauseOnFocus) {
this.play();
}
}
/**
* Play on mouse up
* \@internal
* @return {?}
*/
onMouseUp() {
if (!this.pauseOnFocus) {
this.play();
}
}
/**
* When slides on focus autoplay is stopped(optional)
* \@internal
* @return {?}
*/
pauseFocusIn() {
if (this.pauseOnFocus) {
this.isPlaying = false;
this.resetTimer();
}
}
/**
* When slides out of focus autoplay is started
* \@internal
* @return {?}
*/
pauseFocusOut() {
this.play();
}
/**
* Rolling to specified slide
* @param {?} index
* @return {?}
*/
selectSlide(index) {
if (this.isPlaying) {
this.restartTimer();
}
if (!this.multilist) {
this.activeSlide = this.indicatorsByChunk ? index * this.itemsPerSlide : index;
}
else {
this.selectSlideRange(this.indicatorsByChunk ? index * this.itemsPerSlide : index);
}
}
/**
* Starts a auto changing of slides
* @return {?}
*/
play() {
if (!this.isPlaying) {
this.isPlaying = true;
this.restartTimer();
}
}
/**
* Stops a auto changing of slides
* @return {?}
*/
pause() {
if (!this.noPause) {
this.isPlaying = false;
this.resetTimer();
}
}
/**
* Finds and returns index of currently displayed slide
* @return {?}
*/
getCurrentSlideIndex() {
return this._slides.findIndex(this.getActive);
}
/**
* Defines, whether the specified index is last in collection
* @param {?} index
* @return {?}
*/
isLast(index) {
return index + 1 >= this._slides.length;
}
/**
* Defines, whether the specified index is first in collection
* @param {?} index
* @return {?}
*/
isFirst(index) {
return index === 0;
}
/**
* @return {?}
*/
indicatorsSlides() {
return this.slides.filter((/**
* @param {?} slide
* @param {?} index
* @return {?}
*/
(slide, index) => !this.indicatorsByChunk || index % this.itemsPerSlide === 0));
}
/**
* @private
* @return {?}
*/
selectInitialSlides() {
/** @type {?} */
const startIndex = this.startFromIndex <= this._slides.length
? this.startFromIndex
: 0;
this.hideSlides();
if (this.singleSlideOffset) {
this._slidesWithIndexes = this.mapSlidesAndIndexes();
if (this._slides.length - startIndex < this.itemsPerSlide) {
/** @type {?} */
const slidesToAppend = this._slidesWithIndexes.slice(0, startIndex);
this._slidesWithIndexes = [
...this._slidesWithIndexes,
...slidesToAppend
]
.slice(slidesToAppend.length)
.slice(0, this.itemsPerSlide);
}
else {
this._slidesWithIndexes = this._slidesWithIndexes.slice(startIndex, startIndex + this.itemsPerSlide);
}
this._slidesWithIndexes.forEach((/**
* @param {?} slide
* @return {?}
*/
(slide) => slide.item.active = true));
this.makeSlidesConsistent(this._slidesWithIndexes);
}
else {
this.selectRangeByNestedIndex(startIndex);
}
this.slideRangeChange.emit(this.getVisibleIndexes());
}
/**
* Defines next slide index, depending of direction
* @private
* @param {?} direction
* @param {?} force
* @return {?}
*/
findNextSlideIndex(direction, force) {
/** @type {?} */
let nextSlideIndex = 0;
if (!force &&
(this.isLast(this.activeSlide) &&
direction !== Direction.PREV &&
this.noWrap)) {
return undefined;
}
switch (direction) {
case Direction.NEXT:
// if this is last slide, not force, looping is disabled
// and need to going forward - select current slide, as a next
nextSlideIndex = !this.isLast(this._currentActiveSlide)
? this._currentActiveSlide + 1
: !force && this.noWrap ? this._currentActiveSlide : 0;
break;
case Direction.PREV:
// if this is first slide, not force, looping is disabled
// and need to going backward - select current slide, as a next
nextSlideIndex =
this._currentActiveSlide > 0
? this._currentActiveSlide - 1
: !force && this.noWrap
? this._currentActiveSlide
: this._slides.length - 1;
break;
default:
throw new Error('Unknown direction');
}
return nextSlideIndex;
}
/**
* @private
* @return {?}
*/
mapSlidesAndIndexes() {
return this.slides
.slice()
.map((/**
* @param {?} slide
* @param {?} index
* @return {?}
*/
(slide, index) => {
return {
index,
item: slide
};
}));
}
/**
* @private
* @param {?} index
* @return {?}
*/
selectSlideRange(index) {
if (this.isIndexInRange(index)) {
return;
}
this.hideSlides();
if (!this.singleSlideOffset) {
this.selectRangeByNestedIndex(index);
}
else {
/** @type {?} */
const startIndex = this.isIndexOnTheEdges(index)
? index
: index - this.itemsPerSlide + 1;
/** @type {?} */
const endIndex = this.isIndexOnTheEdges(index)
? index + this.itemsPerSlide
: index + 1;
this._slidesWithIndexes = this.mapSlidesAndIndexes().slice(startIndex, endIndex);
this.makeSlidesConsistent(this._slidesWithIndexes);
this._slidesWithIndexes.forEach((/**
* @param {?} slide
* @return {?}
*/
(slide) => slide.item.active = true));
}
this.slideRangeChange.emit(this.getVisibleIndexes());
}
/**
* @private
* @param {?} index
* @return {?}
*/
selectRangeByNestedIndex(index) {
/** @type {?} */
const selectedRange = this._chunkedSlides
.map((/**
* @param {?} slidesList
* @param {?} i
* @return {?}
*/
(slidesList, i) => {
return {
index: i,
list: slidesList
};
}))
.find((/**
* @param {?} slidesList
* @return {?}
*/
(slidesList) => {
return slidesList.list.find((/**
* @param {?} slide
* @return {?}
*/
slide => slide.index === index)) !== undefined;
}));
this._currentVisibleSlidesIndex = selectedRange.index;
this._chunkedSlides[selectedRange.index].forEach((/**
* @param {?} slide
* @return {?}
*/
(slide) => {
slide.item.active = true;
}));
}
/**
* @private
* @param {?} index
* @return {?}
*/
isIndexOnTheEdges(index) {
return (index + 1 - this.itemsPerSlide <= 0 ||
index + this.itemsPerSlide <= this._slides.length);
}
/**
* @private
* @param {?} index
* @return {?}
*/
isIndexInRange(index) {
if (this.singleSlideOffset) {
/** @type {?} */
const visibleIndexes = this._slidesWithIndexes.map((/**
* @param {?} slide
* @return {?}
*/
(slide) => slide.index));
return visibleIndexes.indexOf(index) >= 0;
}
return (index <= this.getLastVisibleIndex() &&
index >= this.getFirstVisibleIndex());
}
/**
* @private
* @return {?}
*/
hideSlides() {
this.slides.forEach((/**
* @param {?} slide
* @return {?}
*/
(slide) => slide.active = false));
}
/**
* @private
* @return {?}
*/
isVisibleSlideListLast() {
return this._currentVisibleSlidesIndex === this._chunkedSlides.length - 1;
}
/**
* @private
* @return {?}
*/
isVisibleSlideListFirst() {
return this._currentVisibleSlidesIndex === 0;
}
/**
* @private
* @param {?} direction
* @return {?}
*/
moveSliderByOneItem(direction) {
/** @type {?} */
let firstVisibleIndex;
/** @type {?} */
let lastVisibleIndex;
/** @type {?} */
let indexToHide;
/** @type {?} */
let indexToShow;
if (this.noWrap) {
firstVisibleIndex = this.getFirstVisibleIndex();
lastVisibleIndex = this.getLastVisibleIndex();
indexToHide = direction === Direction.NEXT
? firstVisibleIndex
: lastVisibleIndex;
indexToShow = direction !== Direction.NEXT
? firstVisibleIndex - 1
: !this.isLast(lastVisibleIndex)
? lastVisibleIndex + 1 : 0;
this._slides.get(indexToHide).active = false;
this._slides.get(indexToShow).active = true;
/** @type {?} */
const slidesToReorder = this.mapSlidesAndIndexes().filter((/**
* @param {?} slide
* @return {?}
*/
(slide) => slide.item.active));
this.makeSlidesConsistent(slidesToReorder);
this.slideRangeChange.emit(this.getVisibleIndexes());
}
else {
/** @type {?} */
let displayedIndex;
firstVisibleIndex = this._slidesWithIndexes[0].index;
lastVisibleIndex = this._slidesWithIndexes[this._slidesWithIndexes.length - 1].index;
if (direction === Direction.NEXT) {
this._slidesWithIndexes.shift();
displayedIndex = this.isLast(lastVisibleIndex)
? 0
: lastVisibleIndex + 1;
this._slidesWithIndexes.push({
index: displayedIndex,
item: this._slides.get(displayedIndex)
});
}
else {
this._slidesWithIndexes.pop();
displayedIndex = this.isFirst(firstVisibleIndex)
? this._slides.length - 1
: firstVisibleIndex - 1;
this._slidesWithIndexes = [{
index: displayedIndex,
item: this._slides.get(displayedIndex)
}, ...this._slidesWithIndexes];
}
this.hideSlides();
this._slidesWithIndexes.forEach((/**
* @param {?} slide
* @return {?}
*/
slide => slide.item.active = true));
this.makeSlidesConsistent(this._slidesWithIndexes);
this.slideRangeChange.emit(this._slidesWithIndexes.map((/**
* @param {?} slide
* @return {?}
*/
(slide) => slide.index)));
}
}
/**
* @private
* @param {?} direction
* @return {?}
*/
moveMultilist(direction) {
if (this.singleSlideOffset) {
this.moveSliderByOneItem(direction);
}
else {
this.hideSlides();
if (this.noWrap) {
this._currentVisibleSlidesIndex = direction === Direction.NEXT
? this._currentVisibleSlidesIndex + 1
: this._currentVisibleSlidesIndex - 1;
}
else {
if (direction === Direction.NEXT) {
this._currentVisibleSlidesIndex = this.isVisibleSlideListLast()
? 0
: this._currentVisibleSlidesIndex + 1;
}
else {
this._currentVisibleSlidesIndex = this.isVisibleSlideListFirst()
? this._chunkedSlides.length - 1
: this._currentVisibleSlidesIndex - 1;
}
}
this._chunkedSlides[this._currentVisibleSlidesIndex].forEach((/**
* @param {?} slide
* @return {?}
*/
(slide) => slide.item.active = true));
this.slideRangeChange.emit(this.getVisibleIndexes());
}
}
/**
* @private
* @return {?}
*/
getVisibleIndexes() {
if (!this.singleSlideOffset) {
return this._chunkedSlides[this._currentVisibleSlidesIndex]
.map((/**
* @param {?} slide
* @return {?}
*/
(slide) => slide.index));
}
else {
return this._slidesWithIndexes.map((/**
* @param {?} slide
* @return {?}
*/
(slide) => slide.index));
}
}
/**
* Sets a slide, which specified through index, as active
* @private
* @param {?} index
* @return {?}
*/
_select(index) {
if (isNaN(index)) {
this.pause();
return;
}
if (!this.multilist) {
/** @type {?} */
const currentSlide = this._slides.get(this._currentActiveSlide);
if (currentSlide) {
currentSlide.active = false;
}
}
/** @type {?} */
const nextSlide = this._slides.get(index);
if (nextSlide) {
this._currentActiveSlide = index;
nextSlide.active = true;
this.activeSlide = index;
this.activeSlideChange.emit(index);
}
}
/**
* Starts loop of auto changing of slides
* @private
* @return {?}
*/
restartTimer() {
this.resetTimer();
/** @type {?} */
const interval = +this.interval;
if (!isNaN(interval) && interval > 0) {
this.currentInterval = this.ngZone.runOutsideAngular((/**
* @return {?}
*/
() => {
return setInterval((/**
* @return {?}
*/
() => {
/** @type {?} */
const nInterval = +this.interval;
this.ngZone.run((/**
* @return {?}
*/
() => {
if (this.isPlaying &&
!isNaN(this.interval) &&
nInterval > 0 &&
this.slides.length) {
this.nextSlideFromInterval();
}
else {
this.pause();
}
}));
}), interval);
}));
}
}
/**
* @return {?}
*/
get multilist() {
return this.itemsPerSlide > 1;
}
/**
* Stops loop of auto changing of slides
* @private
* @return {?}
*/
resetTimer() {
if (this.currentInterval) {
clearInterval(this.currentInterval);
this.currentInterval = void 0;
}
}
}
CarouselComponent.decorators = [
{ type: Component, args: [{
selector: 'carousel',
template: "
\n"
}] }
];
/** @nocollapse */
CarouselComponent.ctorParameters = () => [
{ type: CarouselConfig },
{ type: NgZone }
];
CarouselComponent.propDecorators = {
noWrap: [{ type: Input }],
noPause: [{ type: Input }],
showIndicators: [{ type: Input }],
pauseOnFocus: [{ type: Input }],
indicatorsByChunk: [{ type: Input }],
itemsPerSlide: [{ type: Input }],
singleSlideOffset: [{ type: Input }],
activeSlideChange: [{ type: Output }],
slideRangeChange: [{ type: Output }],
activeSlide: [{ type: Input }],
startFromIndex: [{ type: Input }],
interval: [{ type: Input }]
};
if (false) {
/** @type {?} */
CarouselComponent.prototype.noWrap;
/** @type {?} */
CarouselComponent.prototype.noPause;
/** @type {?} */
CarouselComponent.prototype.showIndicators;
/** @type {?} */
CarouselComponent.prototype.pauseOnFocus;
/** @type {?} */
CarouselComponent.prototype.indicatorsByChunk;
/** @type {?} */
CarouselComponent.prototype.itemsPerSlide;
/** @type {?} */
CarouselComponent.prototype.singleSlideOffset;
/**
* Will be emitted when active slide has been changed. Part of two-way-bindable [(activeSlide)] property
* @type {?}
*/
CarouselComponent.prototype.activeSlideChange;
/**
* Will be emitted when active slides has been changed in multilist mode
* @type {?}
*/
CarouselComponent.prototype.slideRangeChange;
/** @type {?} */
CarouselComponent.prototype.startFromIndex;
/**
* @type {?}
* @protected
*/
CarouselComponent.prototype.currentInterval;
/**
* @type {?}
* @protected
*/
CarouselComponent.prototype._currentActiveSlide;
/**
* @type {?}
* @protected
*/
CarouselComponent.prototype._interval;
/**
* @type {?}
* @protected
*/
CarouselComponent.prototype._slides;
/**
* @type {?}
* @protected
*/
CarouselComponent.prototype._chunkedSlides;
/**
* @type {?}
* @protected
*/
CarouselComponent.prototype._slidesWithIndexes;
/**
* @type {?}
* @protected
*/
CarouselComponent.prototype._currentVisibleSlidesIndex;
/**
* @type {?}
* @protected
*/
CarouselComponent.prototype.isPlaying;
/**
* @type {?}
* @protected
*/
CarouselComponent.prototype.destroyed;
/** @type {?} */
CarouselComponent.prototype.getActive;
/**
* @type {?}
* @private
*/
CarouselComponent.prototype.makeSlidesConsistent;
/**
* @type {?}
* @private
*/
CarouselComponent.prototype.ngZone;
}
//# 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tslint:disable:max-file-line-count\n/***\n * pause (not yet supported) (?string='hover') - event group name which pauses\n * the cycling of the carousel, if hover pauses on mouseenter and resumes on\n * mouseleave keyboard (not yet supported) (?boolean=true) - if false\n * carousel will not react to keyboard events\n * note: swiping not yet supported\n */\n/****\n * Problems:\n * 1) if we set an active slide via model changes, .active class remains on a\n * current slide.\n * 2) if we have only one slide, we shouldn't show prev/next nav buttons\n * 3) if first or last slide is active and noWrap is true, there should be\n * \"disabled\" class on the nav buttons.\n * 4) default interval should be equal 5000\n */\n\nimport {\n  Component, EventEmitter, Input, NgZone, OnDestroy, Output, AfterViewInit\n} from '@angular/core';\n\nimport { isBs3, LinkedList } from 'ngx-bootstrap/utils';\nimport { SlideComponent } from './slide.component';\nimport { CarouselConfig } from './carousel.config';\nimport { findLastIndex, chunkByNumber } from './utils';\nimport { SlideWithIndex, IndexedSlideList } from './models';\n\nexport enum Direction {\n  UNKNOWN,\n  NEXT,\n  PREV\n}\n\n/**\n * Base element to create carousel\n */\n@Component({\n  selector: 'carousel',\n  templateUrl: './carousel.component.html'\n})\nexport class CarouselComponent implements AfterViewInit, OnDestroy {\n  /* If `true` — carousel will not cycle continuously and will have hard stops (prevent looping) */\n  @Input() noWrap: boolean;\n  /*  If `true` — will disable pausing on carousel mouse hover */\n  @Input() noPause: boolean;\n  /*  If `true` — carousel-indicators are visible  */\n  @Input() showIndicators: boolean;\n  /*  If `true` - autoplay will be stopped on focus */\n  @Input() pauseOnFocus: boolean;\n  /* If `true` - carousel indicators indicate slides chunks\n     works ONLY if singleSlideOffset = FALSE */\n  @Input() indicatorsByChunk = false;\n  /* If value more then 1 — carousel works in multilist mode */\n  @Input() itemsPerSlide = 1;\n  /* If `true` — carousel shifts by one element. By default carousel shifts by number\n     of visible elements (itemsPerSlide field) */\n  @Input() singleSlideOffset = false;\n\n  /** Will be emitted when active slide has been changed. Part of two-way-bindable [(activeSlide)] property */\n  @Output()\n  activeSlideChange: EventEmitter<number> = new EventEmitter<number>(false);\n\n  /** Will be emitted when active slides has been changed in multilist mode */\n  @Output()\n  slideRangeChange: EventEmitter<number[]> = new EventEmitter<number[]>();\n\n  /** Index of currently displayed slide(started for 0) */\n  @Input()\n  set activeSlide(index: number) {\n    if (this.multilist) {\n      return;\n    }\n    if (this._slides.length && index !== this._currentActiveSlide) {\n      this._select(index);\n    }\n  }\n\n  get activeSlide(): number {\n    return this._currentActiveSlide;\n  }\n\n  /* Index to start display slides from it */\n  @Input()\n  startFromIndex = 0;\n\n  /**\n   * Delay of item cycling in milliseconds. If false, carousel won't cycle\n   * automatically.\n   */\n  @Input()\n  get interval(): number {\n    return this._interval;\n  }\n\n  set interval(value: number) {\n    this._interval = value;\n    this.restartTimer();\n  }\n\n  get slides(): SlideComponent[] {\n    return this._slides.toArray();\n  }\n\n  // tslint:disable-next-line:no-any\n  protected currentInterval: any;\n  protected _currentActiveSlide: number;\n  protected _interval: number;\n  protected _slides: LinkedList<SlideComponent> = new LinkedList<SlideComponent>();\n  protected _chunkedSlides: SlideWithIndex[][];\n  protected _slidesWithIndexes: SlideWithIndex[];\n  protected _currentVisibleSlidesIndex = 0;\n  protected isPlaying: boolean;\n  protected destroyed = false;\n\n  get isBs4(): boolean {\n    return !isBs3();\n  }\n\n  constructor(config: CarouselConfig, private ngZone: NgZone) {\n    Object.assign(this, config);\n  }\n\n  ngAfterViewInit(): void {\n    setTimeout(() => {\n      if (this.singleSlideOffset) {\n        this.indicatorsByChunk = false;\n      }\n      if (this.multilist) {\n        this._chunkedSlides = chunkByNumber(\n          this.mapSlidesAndIndexes(),\n          this.itemsPerSlide\n        );\n        this.selectInitialSlides();\n      }\n    }, 0);\n  }\n\n  ngOnDestroy(): void {\n    this.destroyed = true;\n  }\n\n  /**\n   * Adds new slide. If this slide is first in collection - set it as active\n   * and starts auto changing\n   * @param slide\n   */\n  addSlide(slide: SlideComponent): void {\n    this._slides.add(slide);\n\n    if (this.multilist && this._slides.length <= this.itemsPerSlide) {\n      slide.active = true;\n    }\n\n    if (!this.multilist && this._slides.length === 1) {\n      this._currentActiveSlide = undefined;\n      this.activeSlide = 0;\n      this.play();\n    }\n\n    if (this.multilist && this._slides.length > this.itemsPerSlide) {\n      this.play();\n    }\n  }\n\n  /**\n   * Removes specified slide. If this slide is active - will roll to another\n   * slide\n   * @param slide\n   */\n  removeSlide(slide: SlideComponent): void {\n    const remIndex = this._slides.indexOf(slide);\n\n    if (this._currentActiveSlide === remIndex) {\n      // removing of active slide\n      let nextSlideIndex: number = void 0;\n      if (this._slides.length > 1) {\n        // if this slide last - will roll to first slide, if noWrap flag is\n        // FALSE or to previous, if noWrap is TRUE in case, if this slide in\n        // middle of collection, index of next slide is same to removed\n        nextSlideIndex = !this.isLast(remIndex)\n          ? remIndex\n          : this.noWrap ? remIndex - 1 : 0;\n      }\n      this._slides.remove(remIndex);\n\n      // prevents exception with changing some value after checking\n      setTimeout(() => {\n        this._select(nextSlideIndex);\n      }, 0);\n    } else {\n      this._slides.remove(remIndex);\n      const currentSlideIndex = this.getCurrentSlideIndex();\n      setTimeout(() => {\n        // after removing, need to actualize index of current active slide\n        this._currentActiveSlide = currentSlideIndex;\n        this.activeSlideChange.emit(this._currentActiveSlide);\n      }, 0);\n    }\n  }\n\n  nextSlideFromInterval(force = false): void {\n    this.move(Direction.NEXT, force);\n  }\n\n  /**\n   * Rolling to next slide\n   * @param force: {boolean} if true - will ignore noWrap flag\n   */\n  nextSlide(force = false): void {\n    if (this.isPlaying) {\n      this.restartTimer();\n    }\n    this.move(Direction.NEXT, force);\n  }\n\n  /**\n   * Rolling to previous slide\n   * @param force: {boolean} if true - will ignore noWrap flag\n   */\n  previousSlide(force = false): void {\n    if (this.isPlaying) {\n      this.restartTimer();\n    }\n    this.move(Direction.PREV, force);\n  }\n\n  getFirstVisibleIndex(): number {\n    return this.slides.findIndex(this.getActive);\n  }\n\n  getLastVisibleIndex(): number {\n    return findLastIndex(this.slides, this.getActive);\n  }\n\n  getActive = (slide: SlideComponent) => slide.active;\n\n  move(direction: Direction, force = false): void {\n    const firstVisibleIndex = this.getFirstVisibleIndex();\n    const lastVisibleIndex = this.getLastVisibleIndex();\n\n    if (this.noWrap) {\n      if (\n        direction === Direction.NEXT &&\n        this.isLast(lastVisibleIndex) ||\n        direction === Direction.PREV &&\n        firstVisibleIndex === 0\n      ) {\n        return;\n      }\n    }\n\n    if (!this.multilist) {\n      this.activeSlide = this.findNextSlideIndex(direction, force);\n    } else {\n      this.moveMultilist(direction);\n    }\n  }\n\n  /**\n   * Swith slides by enter, space and arrows keys\n   * @internal\n   */\n  keydownPress(event: KeyboardEvent) {\n    // tslint:disable-next-line:deprecation\n    if (event.keyCode === 13 || event.key === 'Enter' || event.keyCode === 32 || event.key === 'Space') {\n      this.nextSlide();\n      event.preventDefault();\n\n      return;\n    }\n\n    // tslint:disable-next-line:deprecation\n    if (event.keyCode === 37 || event.key === 'LeftArrow') {\n      this.previousSlide();\n\n      return;\n    }\n\n    // tslint:disable-next-line:deprecation\n    if (event.keyCode === 39 || event.key === 'RightArrow') {\n      this.nextSlide();\n\n      return;\n    }\n  }\n\n  /**\n   * Play on mouse leave\n   * @internal\n   */\n  onMouseLeave(): void {\n    if (!this.pauseOnFocus) {\n      this.play();\n    }\n  }\n\n  /**\n   * Play on mouse up\n   * @internal\n   */\n  onMouseUp(): void {\n    if (!this.pauseOnFocus) {\n      this.play();\n    }\n  }\n\n  /**\n   * When slides on focus autoplay is stopped(optional)\n   * @internal\n   */\n  pauseFocusIn(): void {\n    if (this.pauseOnFocus) {\n      this.isPlaying = false;\n      this.resetTimer();\n    }\n  }\n\n  /**\n   * When slides out of focus autoplay is started\n   * @internal\n   */\n  pauseFocusOut(): void {\n    this.play();\n  }\n\n  /**\n   * Rolling to specified slide\n   * @param index: {number} index of slide, which must be shown\n   */\n  selectSlide(index: number): void {\n    if (this.isPlaying) {\n      this.restartTimer();\n    }\n\n    if (!this.multilist) {\n      this.activeSlide = this.indicatorsByChunk ? index * this.itemsPerSlide : index;\n    } else {\n      this.selectSlideRange(this.indicatorsByChunk ? index * this.itemsPerSlide : index);\n    }\n  }\n\n  /**\n   * Starts a auto changing of slides\n   */\n  play(): void {\n    if (!this.isPlaying) {\n      this.isPlaying = true;\n      this.restartTimer();\n    }\n  }\n\n  /**\n   * Stops a auto changing of slides\n   */\n  pause(): void {\n    if (!this.noPause) {\n      this.isPlaying = false;\n      this.resetTimer();\n    }\n  }\n\n  /**\n   * Finds and returns index of currently displayed slide\n   */\n  getCurrentSlideIndex(): number {\n    return this._slides.findIndex(this.getActive);\n  }\n\n  /**\n   * Defines, whether the specified index is last in collection\n   * @param index\n   */\n  isLast(index: number): boolean {\n    return index + 1 >= this._slides.length;\n  }\n\n  /**\n   * Defines, whether the specified index is first in collection\n   * @param index\n   */\n  isFirst(index: number): boolean {\n    return index === 0;\n  }\n\n  indicatorsSlides(): SlideComponent[] {\n    return this.slides.filter(\n      (slide: SlideComponent, index: number) => !this.indicatorsByChunk || index % this.itemsPerSlide === 0\n    );\n  }\n\n  private selectInitialSlides(): void {\n    const startIndex = this.startFromIndex <= this._slides.length\n      ? this.startFromIndex\n      : 0;\n\n    this.hideSlides();\n\n    if (this.singleSlideOffset) {\n      this._slidesWithIndexes = this.mapSlidesAndIndexes();\n\n      if (this._slides.length - startIndex < this.itemsPerSlide) {\n        const slidesToAppend = this._slidesWithIndexes.slice(0, startIndex);\n\n        this._slidesWithIndexes  = [\n          ...this._slidesWithIndexes,\n          ...slidesToAppend\n        ]\n          .slice(slidesToAppend.length)\n          .slice(0, this.itemsPerSlide);\n      } else {\n        this._slidesWithIndexes = this._slidesWithIndexes.slice(\n          startIndex,\n          startIndex + this.itemsPerSlide\n        );\n      }\n\n      this._slidesWithIndexes.forEach((slide: SlideWithIndex) => slide.item.active = true);\n      this.makeSlidesConsistent(this._slidesWithIndexes);\n    } else {\n      this.selectRangeByNestedIndex(startIndex);\n    }\n\n    this.slideRangeChange.emit(this.getVisibleIndexes());\n  }\n\n  /**\n   * Defines next slide index, depending of direction\n   * @param direction: Direction(UNKNOWN|PREV|NEXT)\n   * @param force: {boolean} if TRUE - will ignore noWrap flag, else will\n   *   return undefined if next slide require wrapping\n   */\n  private findNextSlideIndex(direction: Direction, force: boolean): number {\n    let nextSlideIndex = 0;\n\n    if (\n      !force &&\n      (this.isLast(this.activeSlide) &&\n        direction !== Direction.PREV &&\n        this.noWrap)\n    ) {\n      return undefined;\n    }\n\n    switch (direction) {\n      case Direction.NEXT:\n        // if this is last slide, not force, looping is disabled\n        // and need to going forward - select current slide, as a next\n        nextSlideIndex = !this.isLast(this._currentActiveSlide)\n          ? this._currentActiveSlide + 1\n          : !force && this.noWrap ? this._currentActiveSlide : 0;\n        break;\n      case Direction.PREV:\n        // if this is first slide, not force, looping is disabled\n        // and need to going backward - select current slide, as a next\n        nextSlideIndex =\n          this._currentActiveSlide > 0\n            ? this._currentActiveSlide - 1\n            : !force && this.noWrap\n              ? this._currentActiveSlide\n              : this._slides.length - 1;\n        break;\n      default:\n        throw new Error('Unknown direction');\n    }\n\n    return nextSlideIndex;\n  }\n\n  private mapSlidesAndIndexes(): SlideWithIndex[] {\n    return this.slides\n      .slice()\n      .map((slide: SlideComponent, index: number) => {\n        return {\n          index,\n          item: slide\n        };\n      });\n  }\n\n\n  private selectSlideRange(index: number): void {\n    if (this.isIndexInRange(index)) {\n      return;\n    }\n\n    this.hideSlides();\n\n    if (!this.singleSlideOffset) {\n      this.selectRangeByNestedIndex(index);\n    } else {\n      const startIndex = this.isIndexOnTheEdges(index)\n        ? index\n        : index - this.itemsPerSlide + 1;\n\n      const endIndex = this.isIndexOnTheEdges(index)\n        ? index + this.itemsPerSlide\n        : index + 1;\n\n      this._slidesWithIndexes = this.mapSlidesAndIndexes().slice(startIndex, endIndex);\n      this.makeSlidesConsistent(this._slidesWithIndexes);\n\n      this._slidesWithIndexes.forEach((slide: SlideWithIndex) => slide.item.active = true);\n    }\n\n    this.slideRangeChange.emit(this.getVisibleIndexes());\n  }\n\n  private selectRangeByNestedIndex(index: number): void {\n    const selectedRange = this._chunkedSlides\n      .map((slidesList, i: number) => {\n        return {\n          index: i,\n          list: slidesList\n        };\n      })\n      .find(\n        (slidesList: IndexedSlideList) => {\n          return slidesList.list.find(slide => slide.index === index) !== undefined;\n        }\n      );\n\n    this._currentVisibleSlidesIndex = selectedRange.index;\n\n    this._chunkedSlides[selectedRange.index].forEach((slide: SlideWithIndex) => {\n      slide.item.active = true;\n    });\n  }\n\n  private isIndexOnTheEdges(index: number): boolean {\n    return (\n      index + 1 - this.itemsPerSlide <= 0 ||\n      index + this.itemsPerSlide <= this._slides.length\n    );\n  }\n\n  private isIndexInRange(index: number): boolean {\n    if (this.singleSlideOffset) {\n      const visibleIndexes = this._slidesWithIndexes.map((slide: SlideWithIndex) => slide.index);\n\n      return visibleIndexes.indexOf(index) >= 0;\n    }\n\n    return (\n      index <= this.getLastVisibleIndex() &&\n      index >= this.getFirstVisibleIndex()\n    );\n  }\n\n  private hideSlides(): void {\n    this.slides.forEach((slide: SlideComponent) => slide.active = false);\n  }\n\n  private isVisibleSlideListLast(): boolean {\n    return this._currentVisibleSlidesIndex === this._chunkedSlides.length - 1;\n  }\n\n  private isVisibleSlideListFirst(): boolean {\n    return this._currentVisibleSlidesIndex === 0;\n  }\n\n  private moveSliderByOneItem(direction: Direction): void {\n    let firstVisibleIndex: number;\n    let lastVisibleIndex: number;\n    let indexToHide: number;\n    let indexToShow: number;\n\n    if (this.noWrap) {\n      firstVisibleIndex = this.getFirstVisibleIndex();\n      lastVisibleIndex = this.getLastVisibleIndex();\n\n      indexToHide = direction === Direction.NEXT\n        ? firstVisibleIndex\n        : lastVisibleIndex;\n\n      indexToShow = direction !== Direction.NEXT\n        ? firstVisibleIndex - 1\n        : !this.isLast(lastVisibleIndex)\n          ? lastVisibleIndex + 1 : 0;\n\n      this._slides.get(indexToHide).active = false;\n      this._slides.get(indexToShow).active = true;\n\n      const slidesToReorder = this.mapSlidesAndIndexes().filter(\n        (slide: SlideWithIndex) => slide.item.active\n      );\n\n      this.makeSlidesConsistent(slidesToReorder);\n\n      this.slideRangeChange.emit(this.getVisibleIndexes());\n    } else {\n      let displayedIndex: number;\n\n      firstVisibleIndex = this._slidesWithIndexes[0].index;\n      lastVisibleIndex = this._slidesWithIndexes[this._slidesWithIndexes.length - 1].index;\n\n      if (direction === Direction.NEXT) {\n        this._slidesWithIndexes.shift();\n\n        displayedIndex = this.isLast(lastVisibleIndex)\n          ? 0\n          : lastVisibleIndex + 1;\n\n        this._slidesWithIndexes.push({\n          index: displayedIndex,\n          item: this._slides.get(displayedIndex)\n        });\n      } else {\n        this._slidesWithIndexes.pop();\n        displayedIndex = this.isFirst(firstVisibleIndex)\n          ? this._slides.length - 1\n          : firstVisibleIndex - 1;\n\n        this._slidesWithIndexes = [{\n          index: displayedIndex,\n          item: this._slides.get(displayedIndex)\n        }, ...this._slidesWithIndexes];\n      }\n\n      this.hideSlides();\n\n      this._slidesWithIndexes.forEach(slide => slide.item.active = true);\n\n      this.makeSlidesConsistent(this._slidesWithIndexes);\n\n      this.slideRangeChange.emit(\n        this._slidesWithIndexes.map((slide: SlideWithIndex) => slide.index)\n      );\n    }\n  }\n\n  private makeSlidesConsistent = (slides: SlideWithIndex[]): void => {\n    slides.forEach((slide: SlideWithIndex, index: number) => slide.item.order = index);\n  }\n\n  private moveMultilist(direction: Direction): void {\n    if (this.singleSlideOffset) {\n      this.moveSliderByOneItem(direction);\n    } else {\n      this.hideSlides();\n\n      if (this.noWrap) {\n        this._currentVisibleSlidesIndex = direction === Direction.NEXT\n          ? this._currentVisibleSlidesIndex + 1\n          : this._currentVisibleSlidesIndex - 1;\n      } else {\n        if (direction === Direction.NEXT) {\n          this._currentVisibleSlidesIndex = this.isVisibleSlideListLast()\n            ? 0\n            : this._currentVisibleSlidesIndex + 1;\n        } else {\n          this._currentVisibleSlidesIndex = this.isVisibleSlideListFirst()\n            ? this._chunkedSlides.length - 1\n            : this._currentVisibleSlidesIndex - 1;\n        }\n      }\n\n      this._chunkedSlides[this._currentVisibleSlidesIndex].forEach(\n        (slide: SlideWithIndex) => slide.item.active = true\n      );\n\n      this.slideRangeChange.emit(this.getVisibleIndexes());\n    }\n  }\n\n  private getVisibleIndexes(): number[] {\n    if (!this.singleSlideOffset) {\n      return this._chunkedSlides[this._currentVisibleSlidesIndex]\n        .map((slide: SlideWithIndex) => slide.index);\n    } else {\n      return this._slidesWithIndexes.map((slide: SlideWithIndex) => slide.index);\n    }\n  }\n\n  /**\n   * Sets a slide, which specified through index, as active\n   * @param index\n   */\n  private _select(index: number): void {\n    if (isNaN(index)) {\n      this.pause();\n\n      return;\n    }\n\n    if (!this.multilist) {\n      const currentSlide = this._slides.get(this._currentActiveSlide);\n      if (currentSlide) {\n        currentSlide.active = false;\n      }\n    }\n\n    const nextSlide = this._slides.get(index);\n    if (nextSlide) {\n      this._currentActiveSlide = index;\n      nextSlide.active = true;\n      this.activeSlide = index;\n      this.activeSlideChange.emit(index);\n    }\n  }\n\n  /**\n   * Starts loop of auto changing of slides\n   */\n  private restartTimer() {\n    this.resetTimer();\n    const interval = +this.interval;\n    if (!isNaN(interval) && interval > 0) {\n      this.currentInterval = this.ngZone.runOutsideAngular(() => {\n        return setInterval(() => {\n          const nInterval = +this.interval;\n          this.ngZone.run(() => {\n            if (\n              this.isPlaying &&\n              !isNaN(this.interval) &&\n              nInterval > 0 &&\n              this.slides.length\n            ) {\n              this.nextSlideFromInterval();\n            } else {\n              this.pause();\n            }\n          });\n        }, interval);\n      });\n    }\n  }\n\n  get multilist(): boolean {\n    return this.itemsPerSlide > 1;\n  }\n\n  /**\n   * Stops loop of auto changing of slides\n   */\n  private resetTimer(): void {\n    if (this.currentInterval) {\n      clearInterval(this.currentInterval);\n      this.currentInterval = void 0;\n    }\n  }\n}\n"]}