rewrite clipboard controller

source/Ox.UI/js/Core/Clipboard.js

@@ -2,26 +2,43 @@
 
 /*@
 Ox.Clipboard <o> Basic clipboard handler
-    copy <f> Copy data to clipboard
+    add <f> Add items to clipboard
-        (data) -> <u> undefined
+        (items[, type]) -> <n> Number of items
-    paste <f> Paste data from clipboard
+    clear <f> Clear clipboard
-        () -> <*> Clipboard data
+        () -> <n> Number of items
+    copy <f> Copy items to clipboard
+        (items[, type]) -> <n> Number of items
+    paste <f> Paste items from clipboard
+        () -> <a> Items
+    type <f> Get item type
+        () -> <s|undefined> Item type
 @*/
 Ox.Clipboard = (function() {
-    var clipboard = {};
+    var clipboard = {items: [], type: void 0};
     return {
         _print: function() {
-            Ox.Log('Core', JSON.stringify(clipboard));
+            Ox.print(JSON.stringify(clipboard));
         },
-        copy: function(data) {
+        add: function(items, type) {
-            clipboard = data;
+            if (type != clipboard.type) {
-            Ox.Log('Core', 'copy', JSON.stringify(clipboard));
+                Ox.Clipboard.clear();
+            }
+            clipboard = {items: clipboard.items.concat(items), type: type};
+            return clipboard.items.length;
+        },
+        clear: function() {
+            clipboard = {items: [], type: void 0};
+            return clipboard.items.length;
+        },
+        copy: function(items, type) {
+            clipboard = {items: items, type: type};
+            return clipboard.items.length;
         },
         paste: function(type) {
-            return type ? clipboard.type : clipboard;
+            return !type || type == clipboard.type ? clipboard.items : [];
         },
-        type: function(type) {
+        type: function() {
-            return type in clipboard;
+            return clipboard.type;
         }
     };
 }());