oxjs/source/UI/js/Core/History.js

73 lines
2 KiB
JavaScript

'use strict';
Ox.History = function(options) {
options = Ox.extend({
text: function(item) {
return item.text;
}
}, options || {});
var history = [],
position = 0,
$element;
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;
$element && $element.triggerEvent('add');
return history.length;
},
bindEvent: function() {
if (!$element) {
$element = Ox.Element();
}
$element.bindEvent.apply($element, arguments);
},
clear: function() {
history = [];
position = 0;
$element && $element.triggerEvent('clear');
return history.length;
},
items: function() {
return history.length;
},
redo: function() {
if (position < history.length) {
position++;
$element && $element.triggerEvent('redo');
return history[position - 1];
}
},
redoText: function() {
if (position < history.length) {
return options.text(history[position]);
}
},
remove: function(test) {
},
unbindEvent: function() {
$element && $element.unbindEvent.apply($element, arguments);
},
undo: function() {
if (position > 0) {
position--;
$element && $element.triggerEvent('undo');
return history[position];
}
},
undoText: function() {
if (position > 0) {
return options.text(history[position - 1]);
}
}
};
};