@twogate/ngx-photo-gallery
Version:
PhotoGallery library for Angular based on [PhotoSwipe](http://photoswipe.com/).
142 lines • 20.2 kB
JavaScript
import { Directive, Output, Input, EventEmitter, Optional } from '@angular/core';
import PhotoSwipe from 'photoswipe';
import PhotoSwipeUI_Default from 'photoswipe/dist/photoswipe-ui-default';
import * as i0 from "@angular/core";
import * as i1 from "../interfaces/config";
import * as i2 from "../services/lightbox.service";
export const DEFAULT_OPTIONS = {
history: false,
closeEl: true,
captionEl: false,
fullscreenEl: false,
zoomEl: true,
shareEl: false,
counterEl: true,
arrowEl: false,
preloaderEl: true,
};
export class PhotoGalleryGroupDirective {
constructor(photoGalleryConfig, lightboxService) {
this.photoGalleryConfig = photoGalleryConfig;
this.lightboxService = lightboxService;
this.onPhotoGalleryInit = new EventEmitter();
this.onPhotoGalleryDestroy = new EventEmitter();
this.galleryItems = {};
this.galleryItemIds = new Set();
this.galleryImages = [];
this.defaultOptions = { ...DEFAULT_OPTIONS, ...this.photoGalleryConfig?.defaultOptions };
}
registerGalleryItem(item) {
const image = {
id: item.id,
src: item.imageUrl,
...(item.caption ? { title: item.caption } : {}),
w: 0,
h: 0,
doGetSlideDimensions: true,
};
this.galleryItems[item.id] = {
id: item.id,
element: item.element,
image,
};
this.galleryItemIds.add(item.id);
}
unregisterGalleryItem(id) {
this.galleryItemIds.delete(id);
}
async openPhotoSwipe(id) {
this.lightboxService.create();
if (this.galleryItems[id].image.doGetSlideDimensions) {
const targetImage = await loadImage(this.galleryItems[id].image.src);
this.galleryItems[id].image.w = targetImage.naturalWidth;
this.galleryItems[id].image.h = targetImage.naturalHeight;
delete this.galleryItems[id].image.doGetSlideDimensions;
}
this.galleryImages = [...this.galleryItemIds].map((key) => this.galleryItems[key].image);
const idx = this.galleryImages.findIndex((image) => image.id === id);
const options = { ...this.defaultOptions, ...this.options };
options.index = idx;
options.getThumbBoundsFn = (imageIndex) => {
const key = this.galleryImages[imageIndex].id;
const thumbnail = this.galleryItems[key].element;
const origin = this.galleryItems[key].image;
const pageYScroll = window.pageYOffset || document.documentElement.scrollTop;
const rect = thumbnail.getBoundingClientRect();
const thumbnailRate = rect.height / rect.width;
const originRate = origin.h / origin.w;
let x, y, w;
if (thumbnailRate > originRate) {
// portrait
y = rect.top + pageYScroll;
w = (origin.w * rect.height) / origin.h;
x = rect.left - (w - rect.width) / 2;
}
else {
// landscape
const imageHeight = (origin.h * rect.width) / origin.w;
x = rect.left;
w = rect.width;
y = rect.top + pageYScroll - (imageHeight - rect.height) / 2;
}
return { x, y, w };
};
const photoSwipe = this.lightboxService.getLightboxElement();
this.gallery = new PhotoSwipe(photoSwipe, PhotoSwipeUI_Default, this.galleryImages, options);
this.gallery.listen('gettingData', (_, slide) => {
if (slide.doGetSlideDimensions) {
setTimeout(async () => {
await this.getSlideDimensions(slide);
}, 300);
}
});
this.gallery.listen('imageLoadComplete', async (_, slide) => {
if (slide.doGetSlideDimensions) {
await this.getSlideDimensions(slide);
}
});
this.gallery.listen('destroy', () => {
this.lightboxService.destroy();
this.onPhotoGalleryDestroy.emit();
});
this.onPhotoGalleryInit.emit();
this.gallery.init();
}
async getSlideDimensions(slide) {
if (!slide.doGetSlideDimensions) {
return;
}
const image = await loadImage(slide.src).catch(() => null);
slide.doGetSlideDimensions = false;
slide.w = image.naturalWidth;
slide.h = image.naturalHeight;
this.gallery.invalidateCurrItems();
this.gallery.updateSize(true);
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.0.6", ngImport: i0, type: PhotoGalleryGroupDirective, deps: [{ token: i1.PhotoGalleryConfig, optional: true }, { token: i2.LightboxService }], target: i0.ɵɵFactoryTarget.Directive }); }
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "18.0.6", type: PhotoGalleryGroupDirective, selector: "[photoGalleryGroup]", inputs: { options: ["photoGalleryGroup", "options"] }, outputs: { onPhotoGalleryInit: "onPhotoGalleryInit", onPhotoGalleryDestroy: "onPhotoGalleryDestroy" }, ngImport: i0 }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.0.6", ngImport: i0, type: PhotoGalleryGroupDirective, decorators: [{
type: Directive,
args: [{
selector: '[photoGalleryGroup]',
}]
}], ctorParameters: () => [{ type: i1.PhotoGalleryConfig, decorators: [{
type: Optional
}] }, { type: i2.LightboxService }], propDecorators: { options: [{
type: Input,
args: ['photoGalleryGroup']
}], onPhotoGalleryInit: [{
type: Output
}], onPhotoGalleryDestroy: [{
type: Output
}] } });
function loadImage(path) {
return new Promise((resolve, reject) => {
const image = new Image();
image.onload = () => resolve(image);
image.onerror = (e) => reject(e);
image.src = path;
});
}
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{ Directive, Output, Input, EventEmitter, Optional } from '@angular/core';\nimport PhotoSwipe from 'photoswipe';\nimport PhotoSwipeUI_Default from 'photoswipe/dist/photoswipe-ui-default';\n\nimport { PhotoGalleryConfig } from '../interfaces/config';\nimport { GalleryImage, GalleryItem, GalleryOptions } from '../interfaces/photoswipe';\nimport { LightboxService } from '../services/lightbox.service';\n\nexport const DEFAULT_OPTIONS = {\n  history: false,\n  closeEl: true,\n  captionEl: false,\n  fullscreenEl: false,\n  zoomEl: true,\n  shareEl: false,\n  counterEl: true,\n  arrowEl: false,\n  preloaderEl: true,\n};\n\n@Directive({\n  selector: '[photoGalleryGroup]',\n})\nexport class PhotoGalleryGroupDirective {\n  @Input('photoGalleryGroup') options: GalleryOptions;\n  @Output() onPhotoGalleryInit = new EventEmitter();\n  @Output() onPhotoGalleryDestroy = new EventEmitter();\n\n  private defaultOptions: GalleryOptions;\n  private gallery: any;\n  private galleryItems: { [key: string]: GalleryItem } = {};\n  private galleryItemIds: Set<string> = new Set<string>();\n  private galleryImages: GalleryImage[] = [];\n\n  constructor(\n    @Optional() private photoGalleryConfig: PhotoGalleryConfig,\n    private lightboxService: LightboxService\n  ) {\n    this.defaultOptions = { ...DEFAULT_OPTIONS, ...this.photoGalleryConfig?.defaultOptions };\n  }\n\n  registerGalleryItem(item: { id: string; element: HTMLElement; imageUrl: string; caption?: string }): void {\n    const image: GalleryImage = {\n      id: item.id,\n      src: item.imageUrl,\n      ...(item.caption ? { title: item.caption } : {}),\n      w: 0,\n      h: 0,\n      doGetSlideDimensions: true,\n    };\n    this.galleryItems[item.id] = {\n      id: item.id,\n      element: item.element,\n      image,\n    };\n\n    this.galleryItemIds.add(item.id);\n  }\n\n  unregisterGalleryItem(id: string): void {\n    this.galleryItemIds.delete(id);\n  }\n\n  async openPhotoSwipe(id: string): Promise<void> {\n    this.lightboxService.create();\n\n    if (this.galleryItems[id].image.doGetSlideDimensions) {\n      const targetImage = await loadImage(this.galleryItems[id].image.src);\n      this.galleryItems[id].image.w = targetImage.naturalWidth;\n      this.galleryItems[id].image.h = targetImage.naturalHeight;\n      delete this.galleryItems[id].image.doGetSlideDimensions;\n    }\n\n    this.galleryImages = [...this.galleryItemIds].map((key) => this.galleryItems[key].image);\n    const idx = this.galleryImages.findIndex((image) => image.id === id);\n    const options: GalleryOptions = { ...this.defaultOptions, ...this.options };\n    options.index = idx;\n    options.getThumbBoundsFn = (imageIndex: number) => {\n      const key = this.galleryImages[imageIndex].id;\n      const thumbnail = this.galleryItems[key].element;\n      const origin = this.galleryItems[key].image;\n      const pageYScroll = window.pageYOffset || document.documentElement.scrollTop;\n      const rect = thumbnail.getBoundingClientRect();\n\n      const thumbnailRate = rect.height / rect.width;\n      const originRate = origin.h / origin.w;\n      let x: number, y: number, w: number;\n      if (thumbnailRate > originRate) {\n        // portrait\n        y = rect.top + pageYScroll;\n        w = (origin.w * rect.height) / origin.h;\n        x = rect.left - (w - rect.width) / 2;\n      } else {\n        // landscape\n        const imageHeight = (origin.h * rect.width) / origin.w;\n        x = rect.left;\n        w = rect.width;\n        y = rect.top + pageYScroll - (imageHeight - rect.height) / 2;\n      }\n\n      return { x, y, w };\n    };\n    const photoSwipe = this.lightboxService.getLightboxElement();\n\n    this.gallery = new PhotoSwipe(photoSwipe, PhotoSwipeUI_Default, this.galleryImages, options);\n    this.gallery.listen('gettingData', (_, slide: GalleryImage) => {\n      if (slide.doGetSlideDimensions) {\n        setTimeout(async () => {\n          await this.getSlideDimensions(slide);\n        }, 300);\n      }\n    });\n    this.gallery.listen('imageLoadComplete', async (_, slide: GalleryImage) => {\n      if (slide.doGetSlideDimensions) {\n        await this.getSlideDimensions(slide);\n      }\n    });\n    this.gallery.listen('destroy', () => {\n      this.lightboxService.destroy();\n      this.onPhotoGalleryDestroy.emit();\n    });\n    this.onPhotoGalleryInit.emit();\n    this.gallery.init();\n  }\n\n  private async getSlideDimensions(slide: GalleryImage): Promise<void> {\n    if (!slide.doGetSlideDimensions) {\n      return;\n    }\n\n    const image: HTMLImageElement = await loadImage(slide.src).catch(() => null);\n\n    slide.doGetSlideDimensions = false;\n\n    slide.w = image.naturalWidth;\n    slide.h = image.naturalHeight;\n\n    this.gallery.invalidateCurrItems();\n    this.gallery.updateSize(true);\n  }\n}\n\nfunction loadImage(path: string): Promise<HTMLImageElement> {\n  return new Promise((resolve, reject) => {\n    const image = new Image();\n    image.onload = () => resolve(image);\n    image.onerror = (e) => reject(e);\n    image.src = path;\n  });\n}\n"]}