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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| import type { DziImage } from '@alleninstitute/vis-dzi'; | ||
| import type { vec2 } from '@alleninstitute/vis-geometry'; | ||
| import { useEffect, useState } from 'react'; | ||
|
|
||
| interface useDziImageProps { | ||
| imageUrls: string[]; | ||
| onComplete?: (imgSize: vec2) => void; | ||
| } | ||
|
|
||
| function decodeDzi(s: string, url: string): DziImage | undefined { | ||
| const parser = new DOMParser(); | ||
| const doc = parser.parseFromString(s, 'text/xml'); | ||
| const err = doc.querySelector('Error'); | ||
| if (err) return undefined; | ||
|
|
||
| if (doc) { | ||
| const img = doc.getElementsByTagName('Image')[0]; | ||
| const size = doc.getElementsByTagName('Size')?.[0]; | ||
| const [format, overlap, tileSize] = [ | ||
| img.getAttribute('Format'), | ||
| img.getAttribute('Overlap'), | ||
| img.getAttribute('TileSize'), | ||
| ]; | ||
| if (size && format && overlap && tileSize) { | ||
| const width = size.getAttribute('Width'); | ||
| const height = size.getAttribute('Height'); | ||
| const splits = url.split('.dzi'); | ||
| if (width && height && splits) { | ||
| return { | ||
| imagesUrl: `${splits?.[0]}_files/`, | ||
| format: format as 'jpeg' | 'png' | 'jpg' | 'JPG' | 'PNG', | ||
| overlap: Number.parseInt(overlap, 10), | ||
| tileSize: Number.parseInt(tileSize, 10), | ||
| size: { | ||
| width: Number.parseInt(width, 10), | ||
| height: Number.parseInt(height, 10), | ||
| }, | ||
| }; | ||
| } | ||
| } | ||
| } | ||
| return undefined; | ||
| } | ||
|
|
||
| async function getImages(urls: string[], callback: (images: Array<DziImage | undefined>) => void) { | ||
| const images = await Promise.all( | ||
| urls.map(async (v) => | ||
| fetch(v) | ||
| .then((res) => { | ||
| console.log(res); | ||
| return res.text(); | ||
| }) | ||
| .then((s) => decodeDzi(s, v)) | ||
| ) | ||
| ); | ||
|
|
||
| callback(images); | ||
| } | ||
|
|
||
| export function useDziImages({ imageUrls, onComplete }: useDziImageProps) { | ||
| const [loading, setLoading] = useState(false); | ||
| const [images, setImages] = useState<DziImage[]>([]); | ||
|
|
||
| useEffect(() => { | ||
| setImages([]); | ||
| setLoading(true); | ||
| const updateImages = (data: Array<DziImage | undefined>) => { | ||
| setImages(data.filter((v) => v !== undefined)); | ||
| setLoading(false); | ||
|
|
||
| // only fire the on complete if we have an image to give a size for | ||
| if (data[0]?.size) { | ||
| onComplete?.([data[0].size.width, data[0].size.height]); | ||
| } | ||
| }; | ||
| getImages(imageUrls, updateImages); | ||
| }, [imageUrls, onComplete]); | ||
|
|
||
| return { images, loading }; | ||
| } |