Abstract common binding routine functions into reusable routine builders for att…

…ribute/state bindings.

 // Generated by CoffeeScript 1.3.1
 (function() {
-  var attributeBinding, bidirectionalBindings, bindings, getInputValue, registerBinding, rivets, setAttribute,
+  var attributeBinding, bidirectionals, bindings, getInputValue, registerBinding, rivets, stateBinding,
     __indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; };
 
   registerBinding = function(el, adapter, type, context, keypath) {
@@ -10,24 +10,13 @@
     adapter.subscribe(context, keypath, function(value) {
       return bind(el, value);
     });
-    if (__indexOf.call(bidirectionalBindings, type) >= 0) {
+    if (__indexOf.call(bidirectionals, type) >= 0) {
       return el.addEventListener('change', function() {
         return adapter.publish(context, keypath, getInputValue(this));
       });
     }
   };
 
-  setAttribute = function(el, attr, value, mirrored) {
-    if (mirrored == null) {
-      mirrored = false;
-    }
-    if (value) {
-      return el.setAttribute(attr, mirrored ? attr : value);
-    } else {
-      return el.removeAttribute(attr);
-    }
-  };
-
   getInputValue = function(el) {
     switch (el.type) {
       case 'text':
@@ -40,31 +29,32 @@
     }
   };
 
+  attributeBinding = function(attr) {
+    return function(el, value) {
+      if (value) {
+        return el.setAttribute(attr, value);
+      } else {
+        return el.removeAttribute(attr);
+      }
+    };
+  };
+
+  stateBinding = function(attr, inverse) {
+    if (inverse == null) {
+      inverse = false;
+    }
+    return function(el, value) {
+      return attributeBinding(attr)(el, inverse === !value ? attr : false);
+    };
+  };
+
   bindings = {
-    show: function(el, value) {
-      return el.style.display = value ? '' : 'none';
-    },
-    hide: function(el, value) {
-      return el.style.display = value ? 'none' : '';
-    },
-    enabled: function(el, value) {
-      return setAttribute(el, 'disabled', !value, true);
-    },
-    disabled: function(el, value) {
-      return setAttribute(el, 'disabled', value, true);
-    },
-    checked: function(el, value) {
-      return setAttribute(el, 'checked', value, true);
-    },
-    unchecked: function(el, value) {
-      return setAttribute(el, 'checked', !value, true);
-    },
-    selected: function(el, value) {
-      return setAttribute(el, 'selected', value, true);
-    },
-    unselected: function(el, value) {
-      return setAttribute(el, 'selected', !value, true);
-    },
+    checked: stateBinding('checked'),
+    selected: stateBinding('selected'),
+    disabled: stateBinding('disabled'),
+    unchecked: stateBinding('checked', true),
+    unselected: stateBinding('selected', true),
+    enabled: stateBinding('disabled', true),
     text: function(el, value) {
       return el.innerText = value || '';
     },
@@ -73,16 +63,16 @@
     },
     value: function(el, value) {
       return el.value = value;
+    },
+    show: function(el, value) {
+      return el.style.display = value ? '' : 'none';
+    },
+    hide: function(el, value) {
+      return el.style.display = value ? 'none' : '';
     }
   };
 
-  attributeBinding = function(attr) {
-    return function(el, value) {
-      return setAttribute(el, attr, value);
-    };
-  };
-
-  bidirectionalBindings = ['value', 'checked', 'unchecked', 'selected', 'unselected'];
+  bidirectionals = ['value', 'checked', 'unchecked', 'selected', 'unselected'];
 
   rivets = {
     bind: function(el, adapter, contexts) {

@@ -10,53 +10,49 @@ registerBinding = (el, adapter, type, context, keypath) ->
   adapter.subscribe context, keypath, (value) ->
     bind el, value
 
-  if type in bidirectionalBindings
+  if type in bidirectionals
     el.addEventListener 'change', ->
       adapter.publish context, keypath, getInputValue this
 
-setAttribute = (el, attr, value, mirrored=false) ->
-  if value
-    el.setAttribute attr, if mirrored then attr else value
-  else
-    el.removeAttribute attr
-
 getInputValue = (el) ->
   switch el.type
     when 'text', 'textarea', 'password', 'select-one' then el.value
     when 'checkbox' then el.checked
 
+attributeBinding = (attr) -> (el, value) ->
+  if value then el.setAttribute attr, value else el.removeAttribute attr
+
+stateBinding = (attr, inverse = false) -> (el, value) ->
+  attributeBinding(attr) el, if inverse is !value then attr else false
+
 bindings =
-  show: (el, value) ->
-    el.style.display = if value then '' else 'none'
-  hide: (el, value) ->
-    el.style.display = if value then 'none' else ''
-  enabled: (el, value) ->
-    setAttribute el, 'disabled', !value, true
-  disabled: (el, value) ->
-    setAttribute el, 'disabled', value, true
-  checked: (el, value) ->
-    setAttribute el, 'checked', value, true
-  unchecked: (el, value) ->
-    setAttribute el, 'checked', !value, true
-  selected: (el, value) ->
-    setAttribute el, 'selected', value, true
-  unselected: (el, value) ->
-    setAttribute el, 'selected', !value, true
+  checked:
+    stateBinding 'checked'
+  selected:
+    stateBinding 'selected'
+  disabled:
+    stateBinding 'disabled'
+  unchecked:
+    stateBinding 'checked', true
+  unselected:
+    stateBinding 'selected', true
+  enabled:
+    stateBinding 'disabled', true
   text: (el, value) ->
     el.innerText = value or ''
   html: (el, value) ->
     el.innerHTML = value or ''
   value: (el, value) ->
     el.value = value
+  show: (el, value) ->
+    el.style.display = if value then '' else 'none'
+  hide: (el, value) ->
+    el.style.display = if value then 'none' else ''
 
-attributeBinding = (attr) ->
-  (el, value) ->
-    setAttribute el, attr, value
-
-bidirectionalBindings = ['value', 'checked', 'unchecked', 'selected', 'unselected']
+bidirectionals = ['value', 'checked', 'unchecked', 'selected', 'unselected']
 
 rivets =
-  bind: (el, adapter, contexts={}) ->
+  bind: (el, adapter, contexts = {}) ->
     nodes = el.getElementsByTagName '*'
 
     [0..(nodes.length - 1)].forEach (n) ->