4e12906061
- Over time the number and size of these factories have increased, especially the `DOMFilterFactory` class, and this split should thus aid readability/maintainability of the code. - By introducing a couple of new import maps we can avoid bundling the `DOMCMapReaderFactory`/`DOMStandardFontDataFactory` classes in the Firefox PDF Viewer, since they are dead code there given that worker-thread fetching is always being used. - This patch has been successfully tested, by running `$ ./mach test toolkit/components/pdfjs/`, in a local Firefox artifact-build. *Note:* This patch reduces the size of the `gulp mozcentral` output by `1.3` kilo-bytes, which isn't a lot but still cannot hurt.
76 lines
2.1 KiB
JavaScript
76 lines
2.1 KiB
JavaScript
/* Copyright 2015 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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import { stringToBytes, unreachable } from "../shared/util.js";
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import { fetchData } from "./display_utils.js";
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class BaseCMapReaderFactory {
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constructor({ baseUrl = null, isCompressed = true }) {
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if (
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(typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING")) &&
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this.constructor === BaseCMapReaderFactory
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) {
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unreachable("Cannot initialize BaseCMapReaderFactory.");
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}
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this.baseUrl = baseUrl;
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this.isCompressed = isCompressed;
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}
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async fetch({ name }) {
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if (!this.baseUrl) {
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throw new Error(
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"Ensure that the `cMapUrl` and `cMapPacked` API parameters are provided."
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);
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}
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if (!name) {
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throw new Error("CMap name must be specified.");
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}
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const url = this.baseUrl + name + (this.isCompressed ? ".bcmap" : "");
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return this._fetch(url)
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.then(cMapData => ({ cMapData, isCompressed: this.isCompressed }))
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.catch(reason => {
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throw new Error(
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`Unable to load ${this.isCompressed ? "binary " : ""}CMap at: ${url}`
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);
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});
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}
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/**
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* @ignore
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* @returns {Promise<Uint8Array>}
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*/
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async _fetch(url) {
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unreachable("Abstract method `_fetch` called.");
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}
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}
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class DOMCMapReaderFactory 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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const data = await fetchData(
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url,
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/* type = */ this.isCompressed ? "arraybuffer" : "text"
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);
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return data instanceof ArrayBuffer
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? new Uint8Array(data)
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: stringToBytes(data);
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}
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}
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export { BaseCMapReaderFactory, DOMCMapReaderFactory };
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