CMaps binary packing

external/cmapscompress/parse.js

@@ -0,0 +1,101 @@
+/* Copyright 2014 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.
+ */
+
+exports.parseAdobeCMap = function (content) {
+  var m = /(\bbegincmap\b[\s\S]*?)\bendcmap\b/.exec(content);
+  if (!m) {
+    throw new Error('cmap was not found');
+  }
+
+  var body = m[1].replace(/\r\n?/g, '\n');
+  var result = {
+    type: 1,
+    wmode: 0,
+    comment: 'Copyright 1990-2009 Adobe Systems Incorporated.\nAll rights reserved.\nhttp://sourceforge.net/adobe/cmap/wiki/License/',
+    usecmap: null,
+    body: []
+  };
+  m = /\/CMapType\s+(\d+)+\s+def\b/.exec(body);
+  result.type = +m[1];
+  m = /\/WMode\s+(\d+)+\s+def\b/.exec(body);
+  result.wmode = +m[1];
+  m = /\/([\w\-]+)\s+usecmap\b/.exec(body);
+  if (m) {
+    result.usecmap = m[1];
+  }
+  var re = /(\d+)\s+(begincodespacerange|beginnotdefrange|begincidchar|begincidrange|beginbfchar|beginbfrange)\n([\s\S]*?)\n(endcodespacerange|endnotdefrange|endcidchar|endcidrange|endbfchar|endbfrange)/g;
+  while (m = re.exec(body)) {
+    var lines = m[3].toLowerCase().split('\n');
+    var m2;
+    switch (m[2]) {
+      case 'begincodespacerange':
+        result.body.push({
+          type: 0,
+          items: lines.map(function (line) {
+            var m = /<(\w+)>\s+<(\w+)>/.exec(line);
+            return {start: m[1], end: m[2]};
+          })
+        });
+        break;
+      case 'beginnotdefrange':
+        result.body.push({
+          type: 1,
+          items: lines.map(function (line) {
+            var m = /<(\w+)>\s+<(\w+)>\s+(\d+)/.exec(line);
+            return {start: m[1], end: m[2], code: +m[3]};
+          })
+        });
+        break;
+      case 'begincidchar':
+        result.body.push({
+          type: 2,
+          items: lines.map(function (line) {
+            var m = /<(\w+)>\s+(\d+)/.exec(line);
+            return {char: m[1], code: +m[2]};
+          })
+        });
+        break;
+      case 'begincidrange':
+        result.body.push({
+          type: 3,
+          items: lines.map(function (line) {
+            var m = /<(\w+)>\s+<(\w+)>\s+(\d+)/.exec(line);
+            return {start: m[1], end: m[2], code: +m[3]};
+          })
+        });
+        break;
+      case 'beginbfchar':
+        result.body.push({
+          type: 4,
+          items: lines.map(function (line) {
+            var m = /<(\w+)>\s+<(\w+)>/.exec(line);
+            return {char: m[1], code: m[2]};
+          })
+        });
+        break;
+      case 'beginbfrange':
+        result.body.push({
+          type: 5,
+          items: lines.map(function (line) {
+            var m = /<(\w+)>\s+<(\w+)>\s+<(\w+)>/.exec(line);
+            return {start: m[1], end: m[2], code: m[3]};
+          })
+        });
+        break;
+    }
+  }
+
+  return result;
+};