1 files changed, 62 insertions, 0 deletions
diff --git a/src/UrlWatcher.js b/src/UrlWatcher.js
new file mode 100644
index 00000000..0892eb1a
--- /dev/null
+++ b/src/UrlWatcher.js
@@ -0,0 +1,62 @@
+
+// ////////////////////////////
+// UrlWatcher
+// ////////////////////////////
+
+function UrlWatcher(location) {
+  this.location = location;
+  this.delay = 25;
+  this.setTimeout = function(fn, delay) {
+    window.setTimeout(fn, delay);
+  };
+  this.listener = function(url) {
+    return url;
+  };
+  this.expectedUrl = location.href;
+}
+
+UrlWatcher.prototype = {
+  listen: function(fn){
+    this.listener = fn;
+  },
+  watch: function() {
+    var self = this;
+    var pull = function() {
+      if (self.expectedUrl !== self.location.href) {
+        var notify = self.location.hash.match(/^#\$iframe_notify=(.*)$/);
+        if (notify) {
+          if (!self.expectedUrl.match(/#/)) {
+            self.expectedUrl += "#";
+          }
+          self.location.href = self.expectedUrl;
+          var id = '_iframe_notify_' + notify[1];
+          var notifyFn = angularCallbacks[id];
+          delete angularCallbacks[id];
+          try {
+            (notifyFn||noop)();
+          } catch (e) {
+            alert(e);
+          }
+        } else {
+          self.listener(self.location.href);
+          self.expectedUrl = self.location.href;
+        }
+      }
+      self.setTimeout(pull, self.delay);
+    };
+    pull();
+  },
+
+  set: function(url) {
+    var existingURL = this.location.href;
+    if (!existingURL.match(/#/))
+      existingURL += '#';
+    if (existingURL != url)
+      this.location.href = url;
+    this.existingURL = url;
+  },
+
+  get: function() {
+    return window.location.href;
+  }
+};