1 files changed, 130 insertions, 0 deletions
diff --git a/src/Browser.js b/src/Browser.js
new file mode 100644
index 00000000..0552b3ae
--- /dev/null
+++ b/src/Browser.js
@@ -0,0 +1,130 @@
+//////////////////////////////
+// Browser
+//////////////////////////////
+
+function Browser(location, document) {
+  this.delay = 50;
+  this.expectedUrl = location.href;
+  this.urlListeners = [];
+  this.hoverListener = noop;
+  this.isMock = false;
+  this.outstandingRequests = { count: 0, callbacks:[]};
+
+  this.XHR = window.XMLHttpRequest || function () {
+    try { return new ActiveXObject("Msxml2.XMLHTTP.6.0"); } catch (e1) {}
+    try { return new ActiveXObject("Msxml2.XMLHTTP.3.0"); } catch (e2) {}
+    try { return new ActiveXObject("Msxml2.XMLHTTP"); } catch (e3) {}
+    throw new Error("This browser does not support XMLHttpRequest.");
+  };
+  this.setTimeout = function(fn, delay) {
+   window.setTimeout(fn, delay);
+  };
+
+  this.location = location;
+  this.document = jqLite(document);
+  this.body = jqLite(document.body);
+}
+
+Browser.prototype = {
+
+  bind: function() {
+    var self = this;
+    self.document.bind("mouseover", function(event){
+      self.hoverListener(jqLite(msie ? event.srcElement : event.target), true);
+      return true;
+    });
+    self.document.bind("mouseleave mouseout click dblclick keypress keyup", function(event){
+      self.hoverListener(jqLite(event.target), false);
+      return true;
+    });
+  },
+
+  hover: function(hoverListener) {
+    this.hoverListener = hoverListener;
+  },
+
+  addCss: function(url) {
+    var doc = this.document[0],
+        head = jqLite(doc.getElementsByTagName('head')[0]),
+        link = jqLite(doc.createElement('link'));
+    link.attr('rel', 'stylesheet');
+    link.attr('type', 'text/css');
+    link.attr('href', url);
+    head.append(link);
+  },
+
+  xhr: function(method, url, post, callback){
+    if (isFunction(post)) {
+      callback = post;
+      post = null;
+    }
+    var xhr = new this.XHR(),
+        self = this;
+    xhr.open(method, url, true);
+    this.outstandingRequests.count ++;
+    xhr.onreadystatechange = function() {
+      if (xhr.readyState == 4) {
+        try {
+          callback(xhr.status || 200, xhr.responseText);
+        } finally {
+          self.outstandingRequests.count--;
+          self.processRequestCallbacks();
+        }
+      }
+    };
+    xhr.send(post || '');
+  },
+
+  processRequestCallbacks: function(){
+    if (this.outstandingRequests.count === 0) {
+      while(this.outstandingRequests.callbacks.length) {
+        try {
+          this.outstandingRequests.callbacks.pop()();
+        } catch (e) {
+        }
+      }
+    }
+  },
+
+  notifyWhenNoOutstandingRequests: function(callback){
+    if (this.outstandingRequests.count === 0) {
+      callback();
+    } else {
+      this.outstandingRequests.callbacks.push(callback);
+    }
+  },
+
+  watchUrl: function(fn){
+    this.urlListeners.push(fn);
+  },
+
+  startUrlWatcher: function() {
+   var self = this;
+   (function pull () {
+     if (self.expectedUrl !== self.location.href) {
+       foreach(self.urlListeners, function(listener){
+         try {
+           listener(self.location.href);
+         } catch (e) {
+           error(e);
+         }
+       });
+       self.expectedUrl = self.location.href;
+     }
+     self.setTimeout(pull, self.delay);
+   })();
+  },
+
+  setUrl: function(url) {
+   var existingURL = this.location.href;
+   if (!existingURL.match(/#/)) existingURL += '#';
+   if (!url.match(/#/)) url += '#';
+   if (existingURL != url) {
+     this.location.href = this.expectedUrl = url;
+   }
+  },
+
+  getUrl: function() {
+   return this.location.href;
+  }
+};