@allmaps/iiif-parser/dist/classes/canvas.js

Allmaps IIIF parser

import { EmbeddedImage } from './image.js';
import { parseVersion2String, parseVersion3String, parseVersion2Metadata, parseVersion3Metadata, parseVersion2Attribution, parseVersion2Thumbnail, parseVersion2Rendering, parseVersion2Related } from '../lib/convert.js';
const CanvasTypeString = 'canvas';
/**
 * Parsed IIIF Canvas
 *
 * @property uri - URI of Canvas
 * @property label - Label of Manifest
 * @property metadata - Metadata of Manifest
 * @property image - Image of painted on Canvas
 * @property height - Height of Canvas
 * @property width - Width of Canvas
 * @property type - Resource type, equals 'canvas'
 */
export class Canvas {
    uri;
    type = CanvasTypeString;
    height;
    width;
    image;
    label;
    description;
    metadata;
    navDate;
    navPlace;
    homepage;
    thumbnail;
    rendering;
    seeAlso;
    summary;
    requiredStatement;
    annotations;
    constructor(parsedCanvas) {
        this.width = parsedCanvas.width;
        this.height = parsedCanvas.height;
        if ('@id' in parsedCanvas) {
            // IIIF Presentation API 2.0
            this.uri = parsedCanvas['@id'];
            this.description = parseVersion2String(parsedCanvas.description);
            this.label = parseVersion2String(parsedCanvas.label);
            this.metadata = parseVersion2Metadata(parsedCanvas.metadata);
            this.navDate = parsedCanvas.navDate;
            this.navPlace = parsedCanvas.navPlace;
            this.requiredStatement = parseVersion2Attribution(parsedCanvas.attribution);
            this.thumbnail = parseVersion2Thumbnail(parsedCanvas.thumbnail);
            this.rendering = parseVersion2Rendering(parsedCanvas.rendering);
            this.homepage = parseVersion2Related(parsedCanvas.related);
            this.image = new EmbeddedImage(parsedCanvas.images[0].resource, parsedCanvas);
        }
        else if ('id' in parsedCanvas) {
            // IIIF Presentation API 3.0
            this.uri = parsedCanvas.id;
            this.label = parseVersion3String(parsedCanvas.label);
            this.description = parseVersion3String(parsedCanvas.description);
            this.metadata = parseVersion3Metadata(parsedCanvas.metadata);
            this.navDate = parsedCanvas.navDate;
            this.navPlace = parsedCanvas.navPlace;
            this.homepage = parsedCanvas.homepage;
            this.thumbnail = parsedCanvas.thumbnail;
            this.rendering = parsedCanvas.rendering;
            this.seeAlso = parsedCanvas.seeAlso;
            this.summary = parsedCanvas.summary;
            this.requiredStatement = parsedCanvas.requiredStatement;
            this.annotations = parsedCanvas.annotations;
            const annotationBodyOrBodies = parsedCanvas.items[0].items[0].body;
            let annotationBody;
            if (Array.isArray(annotationBodyOrBodies)) {
                annotationBody = annotationBodyOrBodies[0];
            }
            else if (annotationBodyOrBodies.type === 'Image') {
                annotationBody = annotationBodyOrBodies;
            }
            else if (annotationBodyOrBodies.type === 'Choice') {
                annotationBody = annotationBodyOrBodies.items[0];
            }
            else {
                throw new Error('Invalid IIIF Canvas');
            }
            this.image = new EmbeddedImage(annotationBody, parsedCanvas);
        }
        else {
            throw new Error('Invalid IIIF Canvas');
        }
    }
}