pdf.js/test/unit/cmap_spec.js

/* globals expect, it, describe, StringStream, CMapFactory, Name, CMap,
           IdentityCMap */

'use strict';

var cMapUrl = '../../external/bcmaps/';
var cMapPacked = true;

describe('cmap', function() {
  it('parses beginbfchar', function() {
    var str = '2 beginbfchar\n' +
              '<03> <00>\n' +
              '<04> <01>\n' +
              'endbfchar\n';
    var stream = new StringStream(str);
    var cmap = CMapFactory.create(stream);
    expect(cmap.lookup(0x03)).toEqual(String.fromCharCode(0x00));
    expect(cmap.lookup(0x04)).toEqual(String.fromCharCode(0x01));
    expect(cmap.lookup(0x05)).toBeUndefined();
  });
  it('parses beginbfrange with range', function() {
    var str = '1 beginbfrange\n' +
              '<06> <0B> 0\n' +
              'endbfrange\n';
    var stream = new StringStream(str);
    var cmap = CMapFactory.create(stream);
    expect(cmap.lookup(0x05)).toBeUndefined();
    expect(cmap.lookup(0x06)).toEqual(String.fromCharCode(0x00));
    expect(cmap.lookup(0x0B)).toEqual(String.fromCharCode(0x05));
    expect(cmap.lookup(0x0C)).toBeUndefined();
  });
  it('parses beginbfrange with array', function() {
    var str = '1 beginbfrange\n' +
              '<0D> <12> [ 0 1 2 3 4 5 ]\n' +
              'endbfrange\n';
    var stream = new StringStream(str);
    var cmap = CMapFactory.create(stream);
    expect(cmap.lookup(0x0C)).toBeUndefined();
    expect(cmap.lookup(0x0D)).toEqual(0x00);
    expect(cmap.lookup(0x12)).toEqual(0x05);
    expect(cmap.lookup(0x13)).toBeUndefined();
  });
  it('parses begincidchar', function() {
    var str = '1 begincidchar\n' +
              '<14> 0\n' +
              'endcidchar\n';
    var stream = new StringStream(str);
    var cmap = CMapFactory.create(stream);
    expect(cmap.lookup(0x14)).toEqual(0x00);
    expect(cmap.lookup(0x15)).toBeUndefined();
  });
  it('parses begincidrange', function() {
    var str = '1 begincidrange\n' +
              '<0016> <001B>   0\n' +
              'endcidrange\n';
    var stream = new StringStream(str);
    var cmap = CMapFactory.create(stream);
    expect(cmap.lookup(0x15)).toBeUndefined();
    expect(cmap.lookup(0x16)).toEqual(0x00);
    expect(cmap.lookup(0x1B)).toEqual(0x05);
    expect(cmap.lookup(0x1C)).toBeUndefined();
  });
  it('decodes codespace ranges', function() {
    var str = '1 begincodespacerange\n' +
              '<01> <02>\n' +
              '<00000003> <00000004>\n' +
              'endcodespacerange\n';
    var stream = new StringStream(str);
    var cmap = CMapFactory.create(stream);
    var c = {};
    cmap.readCharCode(String.fromCharCode(1), 0, c);
    expect(c.charcode).toEqual(1);
    expect(c.length).toEqual(1);
    cmap.readCharCode(String.fromCharCode(0, 0, 0, 3), 0, c);
    expect(c.charcode).toEqual(3);
    expect(c.length).toEqual(4);
  });
  it('decodes 4 byte codespace ranges', function() {
    var str = '1 begincodespacerange\n' +
              '<8EA1A1A1> <8EA1FEFE>\n' +
              'endcodespacerange\n';
    var stream = new StringStream(str);
    var cmap = CMapFactory.create(stream);
    var c = {};
    cmap.readCharCode(String.fromCharCode(0x8E, 0xA1, 0xA1, 0xA1), 0, c);
    expect(c.charcode).toEqual(0x8EA1A1A1);
    expect(c.length).toEqual(4);
  });
  it('read usecmap', function() {
    var str = '/Adobe-Japan1-1 usecmap\n';
    var stream = new StringStream(str);
    var cmap = CMapFactory.create(stream,
                                  { url: cMapUrl, packed: cMapPacked }, null);
    expect(cmap instanceof CMap).toEqual(true);
    expect(cmap.useCMap).not.toBeNull();
    expect(cmap.builtInCMap).toBeFalsy();
    expect(cmap.length).toEqual(0x20A7);
    expect(cmap.isIdentityCMap).toEqual(false);
  });
  it('parses cmapname', function() {
    var str = '/CMapName /Identity-H def\n';
    var stream = new StringStream(str);
    var cmap = CMapFactory.create(stream);
    expect(cmap.name).toEqual('Identity-H');
  });
  it('parses wmode', function() {
    var str = '/WMode 1 def\n';
    var stream = new StringStream(str);
    var cmap = CMapFactory.create(stream);
    expect(cmap.vertical).toEqual(true);
  });
  it('loads built in cmap', function() {
    var cmap = CMapFactory.create(new Name('Adobe-Japan1-1'),
                                  { url: cMapUrl, packed: cMapPacked }, null);
    expect(cmap instanceof CMap).toEqual(true);
    expect(cmap.useCMap).toBeNull();
    expect(cmap.builtInCMap).toBeTruthy();
    expect(cmap.length).toEqual(0x20A7);
    expect(cmap.isIdentityCMap).toEqual(false);
  });
  it('loads built in identity cmap', function() {
    var cmap = CMapFactory.create(new Name('Identity-H'),
                                  { url: cMapUrl, packed: cMapPacked }, null);
    expect(cmap instanceof IdentityCMap).toEqual(true);
    expect(cmap.vertical).toEqual(false);
    expect(cmap.length).toEqual(0x10000);
    expect(function() { return cmap.isIdentityCMap; }).toThrow(
      new Error('should not access .isIdentityCMap'));
  });
});