Began adding protected/private member support

- No longer adding ANY properties to prototype
- protected/private members no longer part of the public access level

lib/class.js

@@ -212,10 +212,9 @@ var extend = ( function( extending )
             base      = args.pop() || Class,
             prototype = new base();
 
-        var properties       = {},
-            members          = member_builder.initMembers(
-                prototype, prototype, prototype
-            ),
+        var properties = {},
+            members    = member_builder.initMembers( prototype ),
+            prop_init  = member_builder.initMembers(),
 
             abstract_methods =
                 util.clone( getMeta( base.__cid ).abstractMethods )
@@ -236,8 +235,10 @@ var extend = ( function( extending )
             {
                 properties[ name ] = value;
 
+                // build a new property, passing in the other members to compare
+                // against for preventing nonsensical overrides
                 member_builder.buildProp(
-                    members, null, name, value, keywords
+                    prop_init, null, name, value, keywords, members
                 );
             },
 
@@ -291,7 +292,7 @@ var extend = ( function( extending )
         // set up the new class
         var new_class = createCtor( abstract_methods );
 
-        attachPropInit( prototype, properties );
+        attachPropInit( prototype, prop_init );
 
         new_class.prototype   = prototype;
         new_class.constructor = new_class;
@@ -470,6 +471,8 @@ function setupProps( func, abstract_methods, class_id )
  */
 function attachPropInit( prototype, properties )
 {
+    var prop_pub = properties[ 'public' ];
+
     util.defineSecureProp( prototype, '__initProps', function()
     {
         // first initialize the parent's properties, so that ours will overwrite
@@ -482,11 +485,11 @@ function attachPropInit( prototype, properties )
 
         // initialize each of the properties for this instance to
         // ensure we're not sharing prototype values
-        for ( prop in properties )
+        for ( prop in prop_pub )
         {
             // initialize the value with a clone to ensure that they do
             // not share references (and therefore, data)
-            this[ prop ] = util.clone( properties[ prop ] );
+            this[ prop ] = util.clone( prop_pub[ prop ] );
         }
     });
 }

lib/member_builder.js

@@ -62,11 +62,12 @@ exports.initMembers = function( mpublic, mprotected, mprivate )
  *
  * @return  {undefined}
  */
-exports.buildMethod = function( members, meta, name, value, keywords )
+exports.buildMethod = function( members, meta, name, value, keywords, cmp )
 {
-    var prev = scanMembers( members, name );
+    var prev;
 
-    if ( prev )
+    // search for any previous instances of this member
+    if ( prev = scanMembers( members, name ) )
     {
         // disallow overriding properties with methods
         if ( !( prev instanceof Function ) )
@@ -124,13 +125,15 @@ exports.buildMethod = function( members, meta, name, value, keywords )
  * @param  {*}       value  property value
  *
  * @param  {Object.<string,boolean>}  keywords  parsed keywords
+
+ * @param  {Object=}  cmp  optional second member object to scan
  *
  * @return  {undefined}
  */
-exports.buildProp = function( members, meta, name, value, keywords )
+exports.buildProp = function( members, meta, name, value, keywords, cmp )
 {
     // disallow overriding methods with properties
-    if ( scanMembers( members, name ) instanceof Function )
+    if ( scanMembers( members, name, cmp ) instanceof Function )
     {
         throw new TypeError(
             "Cannot override method '" + name + "' with property"
@@ -226,11 +229,12 @@ function getMemberVisibility( members, keywords )
  *
  * @param  {{public: Object, protected: Object, private: Object}} members
  *
- * @param  {string}  name  member to locate
+ * @param  {string}   name  member to locate
+ * @param  {Object=}  cmp   optional second member object to scan
  *
  * @return  {*}  member, if located, otherwise undefined
  */
-function scanMembers( members, name )
+function scanMembers( members, name, cmp )
 {
     var i      = visibility.length,
         member = null;
@@ -244,6 +248,14 @@ function scanMembers( members, name )
         }
     }
 
+    // if a second comparison object was given, try again using it instead of
+    // the original members object
+    if ( cmp !== undefined )
+    {
+        return scanMembers( cmp, name );
+    }
+
+    // nothing was found
     return undefined;
 }
 

test/test-class-extend.js

@@ -63,7 +63,7 @@ for ( var prop in sub_props )
 {
     assert.equal(
         sub_props[ prop ],
-        SubFoo.prototype[ prop ],
+        SubFoo()[ prop ],
         "Subtype contains its own properties: " + prop
     );
 }
@@ -139,7 +139,7 @@ assert.equal(
 );
 
 assert.notEqual(
-    SubOther.prototype.newFoo,
+    SubOther().newFoo,
     undefined,
     "Subtype should contain extended members"
 );

test/test-class-visibility.js

@@ -0,0 +1,65 @@
+/**
+ * Tests class member visibility (public, private, protected)
+ *
+ *  Copyright (C) 2010 Mike Gerwitz
+ *
+ *  This file is part of ease.js.
+ *
+ *  ease.js is free software: you can redistribute it and/or modify it under the
+ *  terms of the GNU Lesser General Public License as published by the Free
+ *  Software Foundation, either version 3 of the License, or (at your option)
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
+ *  for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @author  Mike Gerwitz
+ * @package test
+ */
+
+var common = require( './common' ),
+    assert = require( 'assert' ),
+    Class  = common.require( 'class' ),
+
+    pub  = 'foo',
+    prot = 'bar',
+    priv = 'baz',
+
+    // new anonymous class instance
+    foo = Class.extend( {
+        'public pub':      pub,
+        'protected peeps': prot,
+        'private parts':   priv,
+    })();
+
+
+( function testPublicMembersAreAccessbileExternally()
+{
+    assert.equal(
+        foo.pub,
+        pub,
+        "Public properties are accessible via public interface"
+    );
+} )();
+
+
+( function testProtectedAndPrivateMembersAreNotAccessibleExternally()
+{
+    assert.equal(
+        foo.peeps,
+        undefined,
+        "Protected properties are inaccessible via public interface"
+    );
+
+    assert.equal(
+        foo.parts,
+        undefined,
+        "Private properties are inaccessible via public interface"
+    );
+} )();
+