pdfjs-dist/lib/test/unit/cff_parser_spec.js

/**
 * @licstart The following is the entire license notice for the
 * Javascript code in this page
 *
 * Copyright 2021 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.
 *
 * @licend The above is the entire license notice for the
 * Javascript code in this page
 */
"use strict";

var _cff_parser = require("../../core/cff_parser.js");

var _fonts_utils = require("../../core/fonts_utils.js");

var _stream = require("../../core/stream.js");

describe("CFFParser", function () {
  function createWithNullProto(obj) {
    const result = Object.create(null);

    for (const i in obj) {
      result[i] = obj[i];
    }

    return result;
  }

  const privateDictStub = {
    getByName(name) {
      return 0;
    }

  };
  let fontData, parser, cff;
  beforeAll(function () {
    const exampleFont = "0100040100010101134142434445462b" + "54696d65732d526f6d616e000101011f" + "f81b00f81c02f81d03f819041c6f000d" + "fb3cfb6efa7cfa1605e911b8f1120003" + "01010813183030312e30303754696d65" + "7320526f6d616e54696d657300000002" + "010102030e0e7d99f92a99fb7695f773" + "8b06f79a93fc7c8c077d99f85695f75e" + "9908fb6e8cf87393f7108b09a70adf0b" + "f78e14";
    const fontArr = [];

    for (let i = 0, ii = exampleFont.length; i < ii; i += 2) {
      const hex = exampleFont.substring(i, i + 2);
      fontArr.push(parseInt(hex, 16));
    }

    fontData = new _stream.Stream(fontArr);
  });
  afterAll(function () {
    fontData = null;
  });
  beforeEach(function () {
    parser = new _cff_parser.CFFParser(fontData, {}, _fonts_utils.SEAC_ANALYSIS_ENABLED);
    cff = parser.parse();
  });
  afterEach(function () {
    parser = cff = null;
  });
  it("parses header", function () {
    const header = cff.header;
    expect(header.major).toEqual(1);
    expect(header.minor).toEqual(0);
    expect(header.hdrSize).toEqual(4);
    expect(header.offSize).toEqual(1);
  });
  it("parses name index", function () {
    const names = cff.names;
    expect(names.length).toEqual(1);
    expect(names[0]).toEqual("ABCDEF+Times-Roman");
  });
  it("parses string index", function () {
    const strings = cff.strings;
    expect(strings.count).toEqual(3);
    expect(strings.get(0)).toEqual(".notdef");
    expect(strings.get(391)).toEqual("001.007");
  });
  it("parses top dict", function () {
    const topDict = cff.topDict;
    expect(topDict.getByName("version")).toEqual(391);
    expect(topDict.getByName("FullName")).toEqual(392);
    expect(topDict.getByName("FamilyName")).toEqual(393);
    expect(topDict.getByName("Weight")).toEqual(389);
    expect(topDict.getByName("UniqueID")).toEqual(28416);
    expect(topDict.getByName("FontBBox")).toEqual([-168, -218, 1000, 898]);
    expect(topDict.getByName("CharStrings")).toEqual(94);
    expect(topDict.getByName("Private")).toEqual([45, 102]);
  });
  it("refuses to add topDict key with invalid value (bug 1068432)", function () {
    const topDict = cff.topDict;
    const defaultValue = topDict.getByName("UnderlinePosition");
    topDict.setByKey(3075, [NaN]);
    expect(topDict.getByName("UnderlinePosition")).toEqual(defaultValue);
  });
  it("ignores reserved commands in parseDict, and refuses to add privateDict " + "keys with invalid values (bug 1308536)", function () {
    const bytes = new Uint8Array([64, 39, 31, 30, 252, 114, 137, 115, 79, 30, 197, 119, 2, 99, 127, 6]);
    parser.bytes = bytes;
    const topDict = cff.topDict;
    topDict.setByName("Private", [bytes.length, 0]);

    const parsePrivateDict = function () {
      parser.parsePrivateDict(topDict);
    };

    expect(parsePrivateDict).not.toThrow();
    const privateDict = topDict.privateDict;
    expect(privateDict.getByName("BlueValues")).toBeNull();
  });
  it("parses a CharString having cntrmask", function () {
    const bytes = new Uint8Array([0, 1, 1, 0, 38, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 1, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 149, 3, 20, 22, 22, 14]);
    parser.bytes = bytes;
    const charStringsIndex = parser.parseIndex(0).obj;
    const charStrings = parser.parseCharStrings({
      charStrings: charStringsIndex,
      privateDict: privateDictStub
    }).charStrings;
    expect(charStrings.count).toEqual(1);
    expect(charStrings.get(0).length).toEqual(38);
  });
  it("parses a CharString endchar with 4 args w/seac enabled", function () {
    const cffParser = new _cff_parser.CFFParser(fontData, {}, true);
    cffParser.parse();
    const bytes = new Uint8Array([0, 1, 1, 0, 237, 247, 22, 247, 72, 204, 247, 86, 14]);
    cffParser.bytes = bytes;
    const charStringsIndex = cffParser.parseIndex(0).obj;
    const result = cffParser.parseCharStrings({
      charStrings: charStringsIndex,
      privateDict: privateDictStub
    });
    expect(result.charStrings.count).toEqual(1);
    expect(result.charStrings.get(0).length).toEqual(1);
    expect(result.seacs.length).toEqual(1);
    expect(result.seacs[0].length).toEqual(4);
    expect(result.seacs[0][0]).toEqual(130);
    expect(result.seacs[0][1]).toEqual(180);
    expect(result.seacs[0][2]).toEqual(65);
    expect(result.seacs[0][3]).toEqual(194);
  });
  it("parses a CharString endchar with 4 args w/seac disabled", function () {
    const cffParser = new _cff_parser.CFFParser(fontData, {}, false);
    cffParser.parse();
    const bytes = new Uint8Array([0, 1, 1, 0, 237, 247, 22, 247, 72, 204, 247, 86, 14]);
    cffParser.bytes = bytes;
    const charStringsIndex = cffParser.parseIndex(0).obj;
    const result = cffParser.parseCharStrings({
      charStrings: charStringsIndex,
      privateDict: privateDictStub
    });
    expect(result.charStrings.count).toEqual(1);
    expect(result.charStrings.get(0).length).toEqual(9);
    expect(result.seacs.length).toEqual(0);
  });
  it("parses a CharString endchar no args", function () {
    const bytes = new Uint8Array([0, 1, 1, 0, 14]);
    parser.bytes = bytes;
    const charStringsIndex = parser.parseIndex(0).obj;
    const result = parser.parseCharStrings({
      charStrings: charStringsIndex,
      privateDict: privateDictStub
    });
    expect(result.charStrings.count).toEqual(1);
    expect(result.charStrings.get(0)[0]).toEqual(14);
    expect(result.seacs.length).toEqual(0);
  });
  it("parses predefined charsets", function () {
    const charset = parser.parseCharsets(0, 0, null, true);
    expect(charset.predefined).toEqual(true);
  });
  it("parses charset format 0", function () {
    const bytes = new Uint8Array([0x00, 0x00, 0x00, 0x00, 0x00, 0x02]);
    parser.bytes = bytes;
    let charset = parser.parseCharsets(3, 2, new _cff_parser.CFFStrings(), false);
    expect(charset.charset[1]).toEqual("exclam");
    charset = parser.parseCharsets(3, 2, new _cff_parser.CFFStrings(), true);
    expect(charset.charset[1]).toEqual(2);
  });
  it("parses charset format 1", function () {
    const bytes = new Uint8Array([0x00, 0x00, 0x00, 0x01, 0x00, 0x08, 0x01]);
    parser.bytes = bytes;
    let charset = parser.parseCharsets(3, 2, new _cff_parser.CFFStrings(), false);
    expect(charset.charset).toEqual([".notdef", "quoteright", "parenleft"]);
    charset = parser.parseCharsets(3, 2, new _cff_parser.CFFStrings(), true);
    expect(charset.charset).toEqual([0, 8, 9]);
  });
  it("parses charset format 2", function () {
    const bytes = new Uint8Array([0x00, 0x00, 0x00, 0x02, 0x00, 0x08, 0x00, 0x01]);
    parser.bytes = bytes;
    let charset = parser.parseCharsets(3, 2, new _cff_parser.CFFStrings(), false);
    expect(charset.charset).toEqual([".notdef", "quoteright", "parenleft"]);
    charset = parser.parseCharsets(3, 2, new _cff_parser.CFFStrings(), true);
    expect(charset.charset).toEqual([0, 8, 9]);
  });
  it("parses encoding format 0", function () {
    const bytes = new Uint8Array([0x00, 0x00, 0x00, 0x01, 0x08]);
    parser.bytes = bytes;
    const encoding = parser.parseEncoding(2, {}, new _cff_parser.CFFStrings(), null);
    expect(encoding.encoding).toEqual(createWithNullProto({
      0x8: 1
    }));
  });
  it("parses encoding format 1", function () {
    const bytes = new Uint8Array([0x00, 0x00, 0x01, 0x01, 0x07, 0x01]);
    parser.bytes = bytes;
    const encoding = parser.parseEncoding(2, {}, new _cff_parser.CFFStrings(), null);
    expect(encoding.encoding).toEqual(createWithNullProto({
      0x7: 0x01,
      0x08: 0x02
    }));
  });
  it("parses fdselect format 0", function () {
    const bytes = new Uint8Array([0x00, 0x00, 0x01]);
    parser.bytes = bytes.slice();
    const fdSelect = parser.parseFDSelect(0, 2);
    expect(fdSelect.fdSelect).toEqual([0, 1]);
    expect(fdSelect.format).toEqual(0);
  });
  it("parses fdselect format 3", function () {
    const bytes = new Uint8Array([0x03, 0x00, 0x02, 0x00, 0x00, 0x09, 0x00, 0x02, 0x0a, 0x00, 0x04]);
    parser.bytes = bytes.slice();
    const fdSelect = parser.parseFDSelect(0, 4);
    expect(fdSelect.fdSelect).toEqual([9, 9, 0xa, 0xa]);
    expect(fdSelect.format).toEqual(3);
  });
  it("parses invalid fdselect format 3 (bug 1146106)", function () {
    const bytes = new Uint8Array([0x03, 0x00, 0x02, 0x00, 0x01, 0x09, 0x00, 0x02, 0x0a, 0x00, 0x04]);
    parser.bytes = bytes.slice();
    const fdSelect = parser.parseFDSelect(0, 4);
    expect(fdSelect.fdSelect).toEqual([9, 9, 0xa, 0xa]);
    expect(fdSelect.format).toEqual(3);
  });
});
describe("CFFCompiler", function () {
  function testParser(bytes) {
    bytes = new Uint8Array(bytes);
    return new _cff_parser.CFFParser({
      getBytes: () => {
        return bytes;
      }
    }, {}, _fonts_utils.SEAC_ANALYSIS_ENABLED);
  }

  it("encodes integers", function () {
    const c = new _cff_parser.CFFCompiler();
    expect(c.encodeInteger(0)).toEqual([0x8b]);
    expect(c.encodeInteger(100)).toEqual([0xef]);
    expect(c.encodeInteger(-100)).toEqual([0x27]);
    expect(c.encodeInteger(1000)).toEqual([0xfa, 0x7c]);
    expect(c.encodeInteger(-1000)).toEqual([0xfe, 0x7c]);
    expect(c.encodeInteger(10000)).toEqual([0x1c, 0x27, 0x10]);
    expect(c.encodeInteger(-10000)).toEqual([0x1c, 0xd8, 0xf0]);
    expect(c.encodeInteger(100000)).toEqual([0x1d, 0x00, 0x01, 0x86, 0xa0]);
    expect(c.encodeInteger(-100000)).toEqual([0x1d, 0xff, 0xfe, 0x79, 0x60]);
  });
  it("encodes floats", function () {
    const c = new _cff_parser.CFFCompiler();
    expect(c.encodeFloat(-2.25)).toEqual([0x1e, 0xe2, 0xa2, 0x5f]);
    expect(c.encodeFloat(5e-11)).toEqual([0x1e, 0x5c, 0x11, 0xff]);
  });
  it("sanitizes name index", function () {
    const c = new _cff_parser.CFFCompiler();
    let nameIndexCompiled = c.compileNameIndex(["[a"]);
    let parser = testParser(nameIndexCompiled);
    let nameIndex = parser.parseIndex(0);
    let names = parser.parseNameIndex(nameIndex.obj);
    expect(names).toEqual(["_a"]);
    let longName = "";

    for (let i = 0; i < 129; i++) {
      longName += "_";
    }

    nameIndexCompiled = c.compileNameIndex([longName]);
    parser = testParser(nameIndexCompiled);
    nameIndex = parser.parseIndex(0);
    names = parser.parseNameIndex(nameIndex.obj);
    expect(names[0].length).toEqual(127);
  });
  it("compiles fdselect format 0", function () {
    const fdSelect = new _cff_parser.CFFFDSelect(0, [3, 2, 1]);
    const c = new _cff_parser.CFFCompiler();
    const out = c.compileFDSelect(fdSelect);
    expect(out).toEqual([0, 3, 2, 1]);
  });
  it("compiles fdselect format 3", function () {
    const fdSelect = new _cff_parser.CFFFDSelect(3, [0, 0, 1, 1]);
    const c = new _cff_parser.CFFCompiler();
    const out = c.compileFDSelect(fdSelect);
    expect(out).toEqual([3, 0, 2, 0, 0, 0, 0, 2, 1, 0, 4]);
  });
  it("compiles fdselect format 3, single range", function () {
    const fdSelect = new _cff_parser.CFFFDSelect(3, [0, 0]);
    const c = new _cff_parser.CFFCompiler();
    const out = c.compileFDSelect(fdSelect);
    expect(out).toEqual([3, 0, 1, 0, 0, 0, 0, 2]);
  });
  it("compiles charset of CID font", function () {
    const charset = new _cff_parser.CFFCharset();
    const c = new _cff_parser.CFFCompiler();
    const numGlyphs = 7;
    const out = c.compileCharset(charset, numGlyphs, new _cff_parser.CFFStrings(), true);
    expect(out).toEqual([2, 0, 0, 0, numGlyphs - 1]);
  });
  it("compiles charset of non CID font", function () {
    const charset = new _cff_parser.CFFCharset(false, 0, ["space", "exclam"]);
    const c = new _cff_parser.CFFCompiler();
    const numGlyphs = 3;
    const out = c.compileCharset(charset, numGlyphs, new _cff_parser.CFFStrings(), false);
    expect(out).toEqual([0, 0, 1, 0, 2]);
  });
});