From c4cf216ec4683ce28b6e8d324ab1065635731e85 Mon Sep 17 00:00:00 2001
From: Chad Burt <chad@underbluewaters.net>
Date: Mon, 9 Sep 2013 16:07:10 -0700
Subject: [PATCH] Add jsRoot constructor option

Workers were being constructed with a hardcoded path of
'shapefile.js'. The new jsRoot option can be used to
specify an alternate location. For example:

  shapefile = new Shapefile({
      shp: "testdata/world.shp",
      dbf: "testdata/world.dbf",
      jsRoot: '/js-shapefile-to-geojson/'
  }, function(data) ...
---
 shapefile.js | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/shapefile.js b/shapefile.js
index f050d4e..9be3bb6 100644
--- a/shapefile.js
+++ b/shapefile.js
@@ -1,14 +1,18 @@
 (function(window,undefined){
 
     if(window.document && window.Worker){
-        var worker = new Worker("shapefile.js")
+        var worker = null;
 
         var Shapefile = function(o, callback){
             var
-                w = this.worker = worker,
                 t = this,
                 o = typeof o == "string" ? {shp: o} : o
 
+            if (!worker) {
+                var path = (o.jsRoot || "") + "shapefile.js"
+                var w = worker = this.worker = new Worker(path)
+            }
+
             w.onmessage = function(e){
                 t.data = e.date
                 if(callback) callback(e.data)
@@ -69,7 +73,7 @@
         xhr.send()
 
         if(200 != xhr.status)
-        	throw "Unable to load " + o.shp + " status: " + xhr.status
+            throw "Unable to load " + o.shp + " status: " + xhr.status
 
         this.url = o.shp
         this.stream = new Gordon.Stream(xhr.responseText)