Override the buggy hexToRGB implementation in hterm. (#272)

app/lib/hterm.js

@@ -86,5 +86,37 @@ hterm.Terminal.prototype.clearPreserveCursorRow = function () {
   this.scrollPort_.redraw_();
 };
 
+// fixes a bug in hterm, where the shorthand hex
+// is not properly converted to rgb
+lib.colors.hexToRGB = function(arg) {
+  var hex16 = lib.colors.re_.hex16;
+  var hex24 = lib.colors.re_.hex24;
+
+  function convert(hex) {
+    if (hex.length == 4) {
+      hex = hex.replace(hex16, function(h, r, g, b) {
+        return "#" + r + r + g + g + b + b;
+      });
+    }
+    var ary = hex.match(hex24);
+    if (!ary)
+      return null;
+
+    return 'rgb(' + parseInt(ary[1], 16) + ', ' +
+          parseInt(ary[2], 16) + ', ' +
+          parseInt(ary[3], 16) + ')';
+  }
+
+  if (arg instanceof Array) {
+    for (var i = 0; i < arg.length; i++) {
+      arg[i] = convert(arg[i]);
+    }
+  } else {
+    arg = convert(arg);
+  }
+
+  return arg;
+};
+
 export default hterm;
 export { lib };