Convert CID fonts using "ToUnicode" CMap if available

src/fonts.js

@@ -2401,7 +2401,7 @@ var Font = (function FontClosure() {
       this.defaultVMetrics = properties.defaultVMetrics;
     }
 
-    if (properties.toUnicode)
+    if (properties.toUnicode && properties.toUnicode.length > 0)
       this.toUnicode = properties.toUnicode;
     else
       this.rebuildToUnicode(properties);
@@ -4331,12 +4331,12 @@ var Font = (function FontClosure() {
     rebuildToUnicode: function Font_rebuildToUnicode(properties) {
       var firstChar = properties.firstChar, lastChar = properties.lastChar;
       var map = [];
-      if (properties.composite) {
-        var isIdentityMap = this.cidToUnicode.length === 0;
+      var toUnicode = this.toUnicode || this.cidToUnicode;
+      if (toUnicode) {
+        var isIdentityMap = toUnicode.length === 0;
         for (var i = firstChar, ii = lastChar; i <= ii; i++) {
           // TODO missing map the character according font's CMap
-          var cid = i;
-          map[i] = isIdentityMap ? cid : this.cidToUnicode[cid];
+          map[i] = isIdentityMap ? i : toUnicode[i];
         }
       } else {
         for (var i = firstChar, ii = lastChar; i <= ii; i++) {
@@ -4358,6 +4358,14 @@ var Font = (function FontClosure() {
       this.cidToUnicode = cidToUnicodeMap;
       this.unicodeToCID = unicodeToCIDMap;
 
+      var cidEncoding = properties.cidEncoding;
+      if (properties.toUnicode) {
+        if (cidEncoding && cidEncoding.indexOf('Identity-') !== 0) {
+          TODO('Need to create a reverse mapping from \'ToUnicode\' CMap');
+        }
+        return; // 'ToUnicode' CMap will be used
+      }
+
       var cidSystemInfo = properties.cidSystemInfo;
       var cidToUnicode;
       if (cidSystemInfo) {
@@ -4368,7 +4376,6 @@ var Font = (function FontClosure() {
       if (!cidToUnicode)
         return; // identity encoding
 
-      var cidEncoding = properties.cidEncoding;
       var overwrite = HalfwidthCMaps[cidEncoding];
       var cid = 1, i, j, k, ii;
       for (i = 0, ii = cidToUnicode.length; i < ii; ++i) {

test/pdfs/javauninstall-7.pdf.link

@@ -0,0 +1 @@
+http://www.cyberagentfx.jp/gaikaex/pdf/javauninstall-7.pdf

test/test_manifest.json

@@ -891,6 +891,14 @@
       "rounds": 1,
       "type": "eq"
     },
+    {  "id": "javauninstall-7",
+      "file": "pdfs/javauninstall-7.pdf",
+      "md5": "c9eb59503923c9125b9660e348618675",
+      "rounds": 1,
+      "link": true,
+      "lastPage": 1,
+      "type": "eq"
+    },
     {  "id": "jst2007-5",
       "file": "pdfs/JST2007-5.pdf",
       "md5": "9efa6c37fc771b36a60535036d1910bb",