From 2f212c6e4d5223111ff0ae46f743b408f9c28882 Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Sat, 10 Aug 2013 06:46:42 -0500
Subject: [PATCH] improve document/element/context handling.

---
 lib/term.js | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/lib/term.js b/lib/term.js
index ee522a5e..3a211942 100644
--- a/lib/term.js
+++ b/lib/term.js
@@ -138,7 +138,7 @@ function Terminal(options) {
 
   EventEmitter.call(this);
 
-  if (arguments.length > 1) {
+  if (typeof options === 'number') {
     options = {
       cols: arguments[0],
       rows: arguments[1],
@@ -148,9 +148,10 @@ function Terminal(options) {
 
   this._options = options || {};
 
-  this.context = options.context || window;
-  this.document = options.document || document;
-  this.parent = options.body || options.parent || document.body;
+  // this.context = options.context || window;
+  // this.document = options.document || document;
+  this.parent = options.body || options.parent
+    || (document ? document.body : null);
 
   this.cols = options.cols || Terminal.geometry[0];
   this.rows = options.rows || Terminal.geometry[1];
@@ -450,7 +451,14 @@ Terminal.prototype.open = function(parent) {
     , i = 0
     , div;
 
-  this.parent = parent || this.parent || document.body;
+  this.parent = parent || this.parent;
+
+  if (!this.parent) {
+    throw new Error('Terminal requires a parent element.');
+  }
+
+  this.context = this.parent.ownerDocument.defaultView;
+  this.document = this.parent.ownerDocument;
 
   this.element = this.document.createElement('div');
   this.element.className = 'terminal';