pdf.js/test/unit/document_spec.js
Jonas Jenwald 4cc6797f17 Re-factor the idFactory functionality, used in the core/-code, and move the fontID generation into it
Note how the `getFontID`-method in `src/core/fonts.js` is *completely* global, rather than properly tied to the current document. This means that if you repeatedly open and parse/render, and then close, even the *same* PDF document the `fontID`s will still be incremented continuously.

For comparison the `createObjId` method, on `idFactory`, will always create a *consistent* id, assuming of course that the document and its pages are parsed/rendered in the same order.

In order to address this inconsistency, it thus seems reasonable to add a new `createFontId` method on the `idFactory` and use that when obtaining `fontID`s. (When the current `getFontID` method was added the `idFactory` didn't actually exist yet, which explains why the code looks the way it does.)
*Please note:* Since the document id is (still) part of the `loadedName`, it's thus not possible for different documents to have identical font names.
2020-07-07 16:33:31 +02:00

44 lines
1.7 KiB
JavaScript

/* Copyright 2017 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import { createIdFactory } from "./test_utils.js";
describe("document", function () {
describe("Page", function () {
it("should create correct objId/fontId using the idFactory", function () {
const idFactory1 = createIdFactory(/* pageIndex = */ 0);
const idFactory2 = createIdFactory(/* pageIndex = */ 1);
expect(idFactory1.createObjId()).toEqual("p0_1");
expect(idFactory1.createObjId()).toEqual("p0_2");
expect(idFactory1.createFontId()).toEqual("f1");
expect(idFactory1.createFontId()).toEqual("f2");
expect(idFactory1.getDocId()).toEqual("g_d0");
expect(idFactory2.createObjId()).toEqual("p1_1");
expect(idFactory2.createObjId()).toEqual("p1_2");
expect(idFactory2.createFontId()).toEqual("f1");
expect(idFactory2.createFontId()).toEqual("f2");
expect(idFactory2.getDocId()).toEqual("g_d0");
expect(idFactory1.createObjId()).toEqual("p0_3");
expect(idFactory1.createObjId()).toEqual("p0_4");
expect(idFactory1.createFontId()).toEqual("f3");
expect(idFactory1.createFontId()).toEqual("f4");
expect(idFactory1.getDocId()).toEqual("g_d0");
});
});
});