Attempt to infer if a CMap file actually contains just a standard Identity-H
/Identity-V
map
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@ -204,6 +204,7 @@ var CMap = (function CMapClosure() {
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// - bf chars are variable-length byte sequences, stored as strings, with
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// - bf chars are variable-length byte sequences, stored as strings, with
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// one byte per character.
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// one byte per character.
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this._map = [];
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this._map = [];
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this.name = '';
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this.vertical = false;
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this.vertical = false;
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this.useCMap = null;
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this.useCMap = null;
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this.builtInCMap = builtInCMap;
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this.builtInCMap = builtInCMap;
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@ -303,13 +304,28 @@ var CMap = (function CMapClosure() {
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}
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}
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out.charcode = 0;
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out.charcode = 0;
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out.length = 1;
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out.length = 1;
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},
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get isIdentityCMap() {
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if (!(this.name === 'Identity-H' || this.name === 'Identity-V')) {
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return false;
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}
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if (this._map.length !== 0x10000) {
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return false;
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}
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for (var i = 0; i < 0x10000; i++) {
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if (this._map[i] !== i) {
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return false;
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}
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}
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return true;
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}
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}
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};
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};
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return CMap;
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return CMap;
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})();
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})();
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// A special case of CMap, where the _map array implicitly has a length of
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// A special case of CMap, where the _map array implicitly has a length of
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// 65535 and each element is equal to its index.
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// 65536 and each element is equal to its index.
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var IdentityCMap = (function IdentityCMapClosure() {
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var IdentityCMap = (function IdentityCMapClosure() {
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function IdentityCMap(vertical, n) {
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function IdentityCMap(vertical, n) {
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CMap.call(this);
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CMap.call(this);
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@ -364,7 +380,11 @@ var IdentityCMap = (function IdentityCMapClosure() {
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return map;
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return map;
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},
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},
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readCharCode: CMap.prototype.readCharCode
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readCharCode: CMap.prototype.readCharCode,
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get isIdentityCMap() {
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error('should not access .isIdentityCMap');
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}
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};
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};
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return IdentityCMap;
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return IdentityCMap;
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@ -829,6 +849,13 @@ var CMapFactory = (function CMapFactoryClosure() {
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}
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}
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}
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}
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function parseCMapName(cMap, lexer) {
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var obj = lexer.getObj();
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if (isName(obj) && isString(obj.name)) {
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cMap.name = obj.name;
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}
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}
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function parseCMap(cMap, lexer, builtInCMapParams, useCMap) {
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function parseCMap(cMap, lexer, builtInCMapParams, useCMap) {
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var previous;
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var previous;
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var embededUseCMap;
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var embededUseCMap;
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@ -839,6 +866,8 @@ var CMapFactory = (function CMapFactoryClosure() {
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} else if (isName(obj)) {
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} else if (isName(obj)) {
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if (obj.name === 'WMode') {
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if (obj.name === 'WMode') {
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parseWMode(cMap, lexer);
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parseWMode(cMap, lexer);
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} else if (obj.name === 'CMapName') {
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parseCMapName(cMap, lexer);
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}
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}
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previous = obj;
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previous = obj;
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} else if (isCmd(obj)) {
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} else if (isCmd(obj)) {
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@ -948,6 +977,9 @@ var CMapFactory = (function CMapFactoryClosure() {
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} catch (e) {
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} catch (e) {
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warn('Invalid CMap data. ' + e);
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warn('Invalid CMap data. ' + e);
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}
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}
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if (cMap.isIdentityCMap) {
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return createBuiltInCMap(cMap.name, builtInCMapParams);
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}
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return cMap;
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return cMap;
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}
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}
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error('Encoding required.');
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error('Encoding required.');
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@ -1339,7 +1339,11 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
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return new ToUnicodeMap(cmap.getMap());
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return new ToUnicodeMap(cmap.getMap());
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} else if (isStream(cmapObj)) {
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} else if (isStream(cmapObj)) {
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cmap = CMapFactory.create(cmapObj,
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cmap = CMapFactory.create(cmapObj,
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{ url: PDFJS.cMapUrl, packed: PDFJS.cMapPacked }, null).getMap();
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{ url: PDFJS.cMapUrl, packed: PDFJS.cMapPacked }, null);
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if (cmap instanceof IdentityCMap) {
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return new IdentityToUnicodeMap(0, 0xFFFF);
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}
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cmap = cmap.getMap();
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// Convert UTF-16BE
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// Convert UTF-16BE
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// NOTE: cmap can be a sparse array, so use forEach instead of for(;;)
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// NOTE: cmap can be a sparse array, so use forEach instead of for(;;)
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// to iterate over all keys.
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// to iterate over all keys.
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@ -1,6 +1,7 @@
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/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
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/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
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/* globals expect, it, describe, StringStream, CMapFactory, Name */
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/* globals expect, it, describe, StringStream, CMapFactory, Name, CMap,
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IdentityCMap */
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'use strict';
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'use strict';
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@ -92,8 +93,16 @@ describe('cmap', function() {
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var stream = new StringStream(str);
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var stream = new StringStream(str);
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var cmap = CMapFactory.create(stream,
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var cmap = CMapFactory.create(stream,
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{ url: cMapUrl, packed: cMapPacked }, null);
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{ url: cMapUrl, packed: cMapPacked }, null);
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expect(cmap instanceof CMap).toEqual(true);
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expect(cmap.useCMap).not.toBeNull();
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expect(cmap.useCMap).not.toBeNull();
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expect(cmap.builtInCMap).toBeUndefined();
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expect(cmap.builtInCMap).toBeFalsy();
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expect(cmap.isIdentityCMap).toEqual(false);
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});
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it('parses cmapname', function() {
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var str = '/CMapName /Identity-H def\n';
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var stream = new StringStream(str);
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var cmap = CMapFactory.create(stream);
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expect(cmap.name).toEqual('Identity-H');
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});
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});
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it('parses wmode', function() {
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it('parses wmode', function() {
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var str = '/WMode 1 def\n';
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var str = '/WMode 1 def\n';
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@ -104,7 +113,17 @@ describe('cmap', function() {
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it('loads built in cmap', function() {
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it('loads built in cmap', function() {
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var cmap = CMapFactory.create(new Name('Adobe-Japan1-1'),
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var cmap = CMapFactory.create(new Name('Adobe-Japan1-1'),
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{ url: cMapUrl, packed: cMapPacked }, null);
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{ url: cMapUrl, packed: cMapPacked }, null);
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expect(cmap instanceof CMap).toEqual(true);
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expect(cmap.useCMap).toBeNull();
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expect(cmap.useCMap).toBeNull();
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expect(cmap.builtInCMap).toBeTruthy();
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expect(cmap.builtInCMap).toBeTruthy();
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expect(cmap.isIdentityCMap).toEqual(false);
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});
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it('loads built in identity cmap', function() {
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var cmap = CMapFactory.create(new Name('Identity-H'),
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{ url: cMapUrl, packed: cMapPacked }, null);
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expect(cmap instanceof IdentityCMap).toEqual(true);
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expect(cmap.vertical).toEqual(false);
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expect(function() { return cmap.isIdentityCMap; }).toThrow(
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new Error('should not access .isIdentityCMap'));
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});
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});
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});
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});
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