angular-responsive-carousel-ng16
Version:
Carousel for Angular. A simple solution for horizontal scrolling images with lazy loading.
139 lines • 17.1 kB
JavaScript
export class ImageUtils {
constructor(element) {
this.cellStack = [];
this.element = element;
}
getImages() {
return this.cellStack.filter(this.filter);
}
filter(cell) {
return cell.img !== undefined;
}
}
export class Cells {
get images() {
return this.carouselProperties.images;
}
get cellLength() {
return this.cells ? this.cells.length : 0;
}
get fullCellWidth() {
return this.carouselProperties.cellWidth + this.carouselProperties.margin;
}
get cellLengthInLightDOMMode() {
if (this.images) {
let cellLength = this.numberOfVisibleCells + this.overflowCellsLimit * 2;
if (cellLength > this.images.length) {
cellLength = this.images.length;
}
return cellLength;
}
else {
return this.cellLength;
}
}
get numberOfVisibleCells() {
return this.utils.numberOfVisibleCells;
}
get overflowCellsLimit() {
return this.utils.overflowCellsLimit;
}
get isLightDOM() {
return this.carouselProperties.lightDOM || this.carouselProperties.loop;
}
constructor(carouselProperties, utils) {
this.carouselProperties = carouselProperties;
this.utils = utils;
this.counter = 0;
this.imageUtils = new ImageUtils(this.element);
this.init(carouselProperties);
}
updateProperties(carouselProperties) {
this.carouselProperties = carouselProperties;
}
lineUp() {
const cells = this.element ? this.element.children : [];
this.imageUtils.cellStack = [];
for (var i = 0; i < cells.length; i++) {
let cell = cells[i];
let positionX = this.getCellPositionInContainer(i);
cell.style.transform = 'translateX(' + positionX + 'px)';
cell.style.width = this.carouselProperties.cellWidth + 'px';
if (this.getImage(i)) {
this.imageUtils.cellStack.push({
index: i,
positionX,
img: this.getImage(i)['image']
});
}
}
;
}
ifSequenceOfCellsIsChanged() {
const cells = this.element.children;
return cells[0]['style'].transform !== 'translateX(0px)';
}
getCellPositionInContainer(cellIndexInDOMTree) {
let positionIndex = this.getCellIndexInContainer(cellIndexInDOMTree);
return positionIndex * this.fullCellWidth;
}
getCellIndexInContainer(cellIndexInDOMTree) {
let positionIndex;
if (!this.isLightDOM) {
return cellIndexInDOMTree;
}
let cellLength = this.cellLengthInLightDOMMode;
let counter = this.counter - this.overflowCellsLimit;
if (counter > cellLength) {
counter = counter % cellLength;
}
if (counter < 0) {
return cellIndexInDOMTree;
}
else {
positionIndex = cellIndexInDOMTree - counter;
if (positionIndex < 0) {
positionIndex = cellLength + positionIndex;
}
}
return positionIndex;
}
getImage(cellIndex) {
if (!this.images) {
return;
}
let imageIndex = this.getImageIndex(cellIndex);
let file = this.images[imageIndex];
if (file && !file.type) {
file.type = 'image';
}
return {
image: this.images[imageIndex],
imageIndex
};
}
getImageIndex(cellIndexInDOMTree) {
const positionIndex = this.getCellIndexInContainer(cellIndexInDOMTree);
let imageIndex;
if (this.counter > this.overflowCellsLimit) {
let cellLimitOverflow = this.counter - this.overflowCellsLimit;
imageIndex = positionIndex + cellLimitOverflow;
if (this.images && this.carouselProperties.loop) {
imageIndex = imageIndex % this.images.length;
}
}
else {
imageIndex = cellIndexInDOMTree;
}
return imageIndex;
}
setCounter(value) {
this.counter = value;
}
init(carouselProperties) {
this.element = this.carouselProperties.cellsElement;
this.cells = this.element.children;
this.visibleWidth = this.carouselProperties.visibleWidth || this.element.parentElement.clientWidth;
}
}
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{Properties as CarouselProperties, Image} from './interfaces';\n\nexport interface Cell {\n    index: number,\n    positionX: number,\n    img: {\n        image: Image,\n        imageIndex: number\n    }\n}\n\nexport class ImageUtils {\n    cellStack: Cell[] = [];\n    element:any;\n\n    constructor(element: HTMLElement | undefined) {\n        this.element = element;\n    }\n\n    getImages() {\n        return this.cellStack.filter(this.filter);\n    }\n\n    filter(cell: Cell) {\n        return cell.img !== undefined;\n    }\n}\n\nexport class Cells {\n    cells: HTMLCollection | undefined;\n    element!: HTMLElement;\n    visibleWidth: number | undefined;\n    counter: number = 0;\n    imageUtils;\n\n    get images() {\n        return this.carouselProperties.images;\n    }\n\n    get cellLength() {\n        return this.cells ? this.cells.length : 0;\n    }\n\n    get fullCellWidth() {\n        return this.carouselProperties.cellWidth + this.carouselProperties.margin;\n    }\n\n    get cellLengthInLightDOMMode() {\n        if (this.images) {\n            let cellLength = this.numberOfVisibleCells + this.overflowCellsLimit * 2;\n\n            if (cellLength > this.images.length) {\n                cellLength = this.images.length;\n            }\n            return cellLength;\n        } else {\n            return this.cellLength;\n        }\n    }\n\n    get numberOfVisibleCells() {\n        return this.utils.numberOfVisibleCells;\n    }\n\n    get overflowCellsLimit() {\n        return this.utils.overflowCellsLimit;\n    }\n\n    get isLightDOM() {\n        return this.carouselProperties.lightDOM || this.carouselProperties.loop;\n    }\n\n    constructor(\n        private carouselProperties: CarouselProperties,\n        private utils: any) {\n\n        this.imageUtils = new ImageUtils(this.element);\n        this.init(carouselProperties);\n    }\n\n    updateProperties(carouselProperties: CarouselProperties) {\n        this.carouselProperties = carouselProperties;\n    }\n\n    lineUp() {\n        const cells = this.element ? this.element.children : [];\n        this.imageUtils.cellStack = [];\n\n        for (var i = 0; i < cells.length; i++) {\n            let cell = cells[i];\n            let positionX = this.getCellPositionInContainer(i);\n            (cell as HTMLElement).style.transform = 'translateX(' + positionX + 'px)';\n            (cell as HTMLElement).style.width = this.carouselProperties.cellWidth + 'px';\n\n            if (this.getImage(i)) {\n                this.imageUtils.cellStack.push({\n                    index: i,\n                    positionX,\n                    img: this.getImage(i)!['image']\n                });\n            }\n        };\n    }\n\n    ifSequenceOfCellsIsChanged() {\n        const cells:any = this.element.children;\n        return cells[0]['style'].transform !== 'translateX(0px)';\n    }\n\n    getCellPositionInContainer(cellIndexInDOMTree: number) {\n        let positionIndex = this.getCellIndexInContainer(cellIndexInDOMTree);\n        return positionIndex * this.fullCellWidth;\n    }\n\n    getCellIndexInContainer(cellIndexInDOMTree: number) {\n        let positionIndex;\n\n        if (!this.isLightDOM) {\n            return cellIndexInDOMTree;\n        }\n\n        let cellLength = this.cellLengthInLightDOMMode;\n        let counter = this.counter - this.overflowCellsLimit;\n\n        if (counter > cellLength) {\n            counter = counter % cellLength;\n        }\n\n        if (counter < 0) {\n            return cellIndexInDOMTree;\n        } else {\n            positionIndex = cellIndexInDOMTree - counter;\n            if (positionIndex < 0) {\n                positionIndex = cellLength + positionIndex;\n            }\n        }\n\n        return positionIndex;\n    }\n\n    getImage(cellIndex: number) {\n        if (!this.images) {\n            return;\n        }\n\n        let imageIndex = this.getImageIndex(cellIndex);\n        let file = this.images[imageIndex];\n\n        if (file && !file.type) {\n            file.type = 'image';\n        }\n\n        return {\n            image: this.images[imageIndex],\n            imageIndex\n        };\n    }\n\n    getImageIndex(cellIndexInDOMTree: number) {\n        const positionIndex = this.getCellIndexInContainer(cellIndexInDOMTree);\n        let imageIndex;\n\n        if (this.counter > this.overflowCellsLimit) {\n            let cellLimitOverflow = this.counter - this.overflowCellsLimit;\n            imageIndex = positionIndex + cellLimitOverflow;\n\n            if (this.images && this.carouselProperties.loop) {\n                imageIndex = imageIndex % this.images.length;\n            }\n        } else {\n            imageIndex = cellIndexInDOMTree;\n        }\n\n        return imageIndex;\n    }\n\n    setCounter(value: number) {\n        this.counter = value;\n    }\n\n    init(carouselProperties: CarouselProperties) {\n        this.element = this.carouselProperties.cellsElement;\n        this.cells = this.element.children;\n        this.visibleWidth = this.carouselProperties.visibleWidth || this.element!.parentElement!.clientWidth;\n    }\n}"]}