Merge pull request #134 from zowens/master

Allow formatters to be passed in as an option to rivets.bind

 describe('Rivets.Binding', function() {
-  var model, el, view, binding;
+  var model, el, view, binding, opts;
 
   beforeEach(function() {
     rivets.configure({
@@ -13,7 +13,8 @@ describe('Rivets.Binding', function() {
 
     el = document.createElement('div');
     el.setAttribute('data-text', 'obj.name');
-    view = rivets.bind(el, {obj: {}});
+    opts = {};
+    view = rivets.bind(el, {obj: {}}, opts);
     binding = view.bindings[0];
     model = binding.model;
   });
@@ -103,7 +104,7 @@ describe('Rivets.Binding', function() {
       binding.unbind();
       expect(binding.binder.unbind).toHaveBeenCalled();
     });
-    
+
     describe('with the bypass option set to true', function() {
       beforeEach(function() {
         binding.options.bypass = true;
@@ -240,11 +241,11 @@ describe('Rivets.Binding', function() {
 
 
     it("should apply read binders left to right, and write binders right to left", function() {
-      rivets.formatters.totally = { 
+      rivets.formatters.totally = {
         publish: function(value) { return value + ' totally'; },
         read: function(value) { return value + ' totally'; }
       };
-      rivets.formatters.awesome = { 
+      rivets.formatters.awesome = {
         publish: function(value) { return value + ' is awesome'; },
         read: function(value) { return value + ' is awesome'; }
       };
@@ -268,7 +269,7 @@ describe('Rivets.Binding', function() {
     });
 
      it("binders in a chain should be skipped if they're not there", function() {
-      rivets.formatters.totally = { 
+      rivets.formatters.totally = {
         publish: function(value) { return value + ' totally'; },
         read: function(value) { return value + ' totally'; }
       };
@@ -310,6 +311,12 @@ describe('Rivets.Binding', function() {
       expect(binding.formattedValue('hat')).toBe('model awesome hat');
     });
 
+    it('uses formatters from the bind options', function() {
+      opts.formatters = { optAwesome: function(value) { return 'option awesome ' + value; } };
+      binding.formatters.push("optAwesome");
+      expect(binding.formattedValue('hat')).toBe('option awesome hat');
+    });
+
     describe('with a multi-argument formatter string', function() {
       beforeEach(function() {
         rivets.formatters.awesome = function(value, prefix) {

@@ -40,6 +40,8 @@ class Rivets.Binding
 
       formatter = if @model[id] instanceof Function
         @model[id]
+      else if @options?.bindingOptions?.formatters?[id] instanceof Function
+        @options.bindingOptions.formatters[id]
       else
         Rivets.formatters[id]
 
@@ -68,7 +70,7 @@ class Rivets.Binding
       Rivets.config.adapter.read @model, @keypath
 
   # Publishes the value currently set on the input element back to the model.
-  publish: => 
+  publish: =>
     value = getInputValue @el
 
     for formatter in @formatters.slice(0).reverse()
@@ -127,7 +129,7 @@ class Rivets.Binding
 class Rivets.View
   # The DOM elements and the model objects for binding are passed into the
   # constructor.
-  constructor: (@els, @models) ->
+  constructor: (@els, @models, @options) ->
     @els = [@els] unless (@els.jquery || @els instanceof Array)
     @build()
 
@@ -166,6 +168,9 @@ class Rivets.View
           if bindingRegExp.test attribute.name
             options = {}
 
+            if @options? and typeof @options is 'object'
+                options.bindingOptions = @options
+
             type = attribute.name.replace bindingRegExp, ''
             pipes = (pipe.trim() for pipe in attribute.value.split '|')
             context = (ctx.trim() for ctx in pipes.shift().split '<')
@@ -411,8 +416,8 @@ factory = (exports) ->
 
   # Binds a set of model objects to a parent DOM element. Returns a Rivets.View
   # instance.
-  exports.bind = (el, models = {}) ->
-    view = new Rivets.View(el, models)
+  exports.bind = (el, models = {}, options = {}) ->
+    view = new Rivets.View(el, models, options)
     view.bind()
     view