From 31d54403fbab5c299be4538c1d53ad04d6aadac6 Mon Sep 17 00:00:00 2001
From: rlx <0x0073@0x2620.org>
Date: Sat, 3 Aug 2013 13:58:36 +0000
Subject: [PATCH] add Ox.History

---
 source/Ox.UI/js/Core/History.js | 57 +++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 source/Ox.UI/js/Core/History.js

diff --git a/source/Ox.UI/js/Core/History.js b/source/Ox.UI/js/Core/History.js
new file mode 100644
index 00000000..61fb93f9
--- /dev/null
+++ b/source/Ox.UI/js/Core/History.js
@@ -0,0 +1,57 @@
+'use strict';
+
+Ox.History = function(options) {
+
+    options = Ox.extend({
+        text: function(item) {
+            return item.text;
+        }
+    }, options || {});
+
+    var history = [],
+        position = 0;
+
+    return {
+        _print: function() {
+            Ox.print(JSON.stringify({history: history, position: position}));
+        },
+        add: function(items) {
+            items = Ox.makeArray(items);
+            history = history.slice(0, position).concat(items);
+            position += items.length;
+            return history.length;
+        },
+        clear: function() {
+            history = [];
+            position = 0;
+            return history.length;
+        },
+        items: function() {
+            return history.length;
+        },
+        redo: function() {
+            if (position < history.length) {
+                return history[position++];
+            }
+        },
+        redoText: function() {
+            if (position < history.length) {
+                return options.text(history[position]);
+            }
+        },
+        remove: function(test) {
+            
+        },
+        undo: function() {
+            if (position > 0) {
+                return history[--position];
+            }
+        },
+        undoText: function() {
+            if (position > 0) {
+                return options.text(history[position - 1]);
+            }
+        }
+    };
+
+};