First pass on FontWorker

worker/font.js

@@ -0,0 +1,65 @@
+/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- /
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+
+"use strict";
+
+importScripts("console.js");
+
+importScripts("../pdf.js");
+importScripts("../fonts.js");
+importScripts("../glyphlist.js")
+
+function fontDataToString(font) {
+  // Doing postMessage on objects make them lose their "shape". This adds the
+  // "shape" for all required objects agains, such that the encoding works as
+  // expected.
+  var fontFileDict = new Dict();
+  fontFileDict.map = font.file.dict.map;
+
+  var fontFile = new Stream(font.file.bytes, font.file.start, font.file.end - font.file.start, fontFileDict);
+  font.file = new FlateStream(fontFile);
+  
+  // This will encode the font.
+  var fontObj = new Font(font.name, font.file, font.properties);
+
+  // Create string that is used for css later.
+  var str = "";
+  var data = fontObj.data;
+  var length = data.length;
+  for (var j = 0; j < length; j++)
+    str += String.fromCharCode(data[j]);
+  
+  return {
+    str:      str,
+    encoding: font.properties.encoding
+  }
+}
+
+/**
+* Functions to handle data sent by the MainThread.
+*/
+var actionHandler = {
+  "fonts": function(data) {
+    var fontData;
+    var result = {};
+    for (var i = 0; i < data.length; i++) {
+      fontData = data[i];
+      result[fontData.name] = fontDataToString(fontData);
+    }
+    
+    postMessage({
+      action: "fonts",
+      data:   result
+    })
+  },
+}
+
+// Listen to the MainThread for data and call actionHandler on it.
+this.onmessage = function(event) {
+  var data = event.data;
+  if (data.action in actionHandler) {
+    actionHandler[data.action].call(this, data.data);
+  } else {
+    throw "Unkown action from worker: " + data.action;
+  }
+}