3d4e8bb17e
Modern Node.js versions now include a `navigator` implementation, with a few basic properties, that's actually enough for the PDF.js use-cases; please see https://nodejs.org/api/globals.html#navigator Unfortunately we still support Node.js version `20`, hence we add a basic polyfill since that allows simplifying the code slightly.
136 lines
3.5 KiB
JavaScript
136 lines
3.5 KiB
JavaScript
/* Copyright 2020 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/* globals process */
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import { isNodeJS, warn } from "../shared/util.js";
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import { BaseCanvasFactory } from "./canvas_factory.js";
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import { BaseCMapReaderFactory } from "./cmap_reader_factory.js";
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import { BaseFilterFactory } from "./filter_factory.js";
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import { BaseStandardFontDataFactory } from "./standard_fontdata_factory.js";
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import { BaseWasmFactory } from "./wasm_factory.js";
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if (typeof PDFJSDev !== "undefined" && PDFJSDev.test("MOZCENTRAL")) {
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throw new Error(
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'Module "./node_utils.js" shall not be used with MOZCENTRAL builds.'
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);
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}
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if (isNodeJS) {
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if (typeof PDFJSDev === "undefined" || PDFJSDev.test("SKIP_BABEL")) {
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warn("Please use the `legacy` build in Node.js environments.");
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} else {
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let canvas;
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try {
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const require = process
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.getBuiltinModule("module")
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.createRequire(import.meta.url);
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try {
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canvas = require("@napi-rs/canvas");
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} catch (ex) {
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warn(`Cannot load "@napi-rs/canvas" package: "${ex}".`);
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}
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} catch (ex) {
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warn(`Cannot access the \`require\` function: "${ex}".`);
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}
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if (!globalThis.DOMMatrix) {
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if (canvas?.DOMMatrix) {
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globalThis.DOMMatrix = canvas.DOMMatrix;
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} else {
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warn("Cannot polyfill `DOMMatrix`, rendering may be broken.");
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}
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}
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if (!globalThis.ImageData) {
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if (canvas?.ImageData) {
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globalThis.ImageData = canvas.ImageData;
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} else {
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warn("Cannot polyfill `ImageData`, rendering may be broken.");
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}
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}
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if (!globalThis.Path2D) {
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if (canvas?.Path2D) {
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globalThis.Path2D = canvas.Path2D;
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} else {
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warn("Cannot polyfill `Path2D`, rendering may be broken.");
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}
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}
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if (!globalThis.navigator?.language) {
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globalThis.navigator = {
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language: "en-US",
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platform: "",
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userAgent: "",
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};
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}
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}
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}
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async function fetchData(url) {
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const fs = process.getBuiltinModule("fs");
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const data = await fs.promises.readFile(url);
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return new Uint8Array(data);
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}
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class NodeFilterFactory extends BaseFilterFactory {}
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class NodeCanvasFactory extends BaseCanvasFactory {
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/**
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* @ignore
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*/
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_createCanvas(width, height) {
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const require = process
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.getBuiltinModule("module")
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.createRequire(import.meta.url);
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const canvas = require("@napi-rs/canvas");
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return canvas.createCanvas(width, height);
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}
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}
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class NodeCMapReaderFactory extends BaseCMapReaderFactory {
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/**
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* @ignore
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*/
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async _fetch(url) {
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return fetchData(url);
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}
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}
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class NodeStandardFontDataFactory extends BaseStandardFontDataFactory {
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/**
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* @ignore
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*/
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async _fetch(url) {
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return fetchData(url);
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}
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}
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class NodeWasmFactory extends BaseWasmFactory {
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/**
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* @ignore
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*/
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async _fetch(url) {
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return fetchData(url);
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}
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}
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export {
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fetchData,
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NodeCanvasFactory,
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NodeCMapReaderFactory,
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NodeFilterFactory,
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NodeStandardFontDataFactory,
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NodeWasmFactory,
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};
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