74 lines
2.8 KiB
TypeScript
74 lines
2.8 KiB
TypeScript
import { uniqueId } from "@util/convenience-functions";
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import { IContext, IXmlableObject } from "@file/xml-components";
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import { DocPropertiesOptions } from "@file/drawing/doc-properties/doc-properties";
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import { Drawing, IFloating } from "../../drawing";
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import { IMediaTransformation } from "../../media";
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import { IMediaData } from "../../media/data";
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import { Run } from "../run";
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export interface IImageOptions {
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readonly data: Buffer | string | Uint8Array | ArrayBuffer;
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readonly transformation: IMediaTransformation;
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readonly floating?: IFloating;
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readonly altText?: DocPropertiesOptions;
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}
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export class ImageRun extends Run {
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private readonly key = `${uniqueId()}.png`;
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private readonly imageData: IMediaData;
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public constructor(options: IImageOptions) {
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super({});
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const newData = typeof options.data === "string" ? this.convertDataURIToBinary(options.data) : options.data;
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this.imageData = {
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stream: newData,
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fileName: this.key,
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transformation: {
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pixels: {
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x: Math.round(options.transformation.width),
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y: Math.round(options.transformation.height),
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},
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emus: {
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x: Math.round(options.transformation.width * 9525),
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y: Math.round(options.transformation.height * 9525),
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},
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flip: options.transformation.flip,
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rotation: options.transformation.rotation ? options.transformation.rotation * 60000 : undefined,
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},
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};
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const drawing = new Drawing(this.imageData, { floating: options.floating, docProperties: options.altText });
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this.root.push(drawing);
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}
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public prepForXml(context: IContext): IXmlableObject | undefined {
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context.file.Media.addImage(this.key, this.imageData);
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return super.prepForXml(context);
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}
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private convertDataURIToBinary(dataURI: string): Uint8Array {
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if (typeof atob === "function") {
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// https://gist.github.com/borismus/1032746
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// https://github.com/mafintosh/base64-to-uint8array
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const BASE64_MARKER = ";base64,";
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const base64Index = dataURI.indexOf(BASE64_MARKER);
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const base64IndexWithOffset = base64Index === -1 ? 0 : base64Index + BASE64_MARKER.length;
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return new Uint8Array(
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atob(dataURI.substring(base64IndexWithOffset))
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.split("")
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.map((c) => c.charCodeAt(0)),
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);
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} else {
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// eslint-disable-next-line @typescript-eslint/no-require-imports, @typescript-eslint/no-var-requires
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const b = require("buf" + "fer");
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return new b.Buffer(dataURI, "base64");
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}
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}
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}
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