58 lines
1.4 KiB
JavaScript
58 lines
1.4 KiB
JavaScript
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'use strict';
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Ox.History = function(options) {
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options = Ox.extend({
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text: function(item) {
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return item.text;
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}
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}, options || {});
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var history = [],
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position = 0;
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return {
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_print: function() {
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Ox.print(JSON.stringify({history: history, position: position}));
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},
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add: function(items) {
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items = Ox.makeArray(items);
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history = history.slice(0, position).concat(items);
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position += items.length;
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return history.length;
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},
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clear: function() {
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history = [];
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position = 0;
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return history.length;
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},
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items: function() {
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return history.length;
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},
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redo: function() {
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if (position < history.length) {
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return history[position++];
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}
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},
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redoText: function() {
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if (position < history.length) {
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return options.text(history[position]);
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}
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},
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remove: function(test) {
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},
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undo: function() {
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if (position > 0) {
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return history[--position];
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}
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},
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undoText: function() {
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if (position > 0) {
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return options.text(history[position - 1]);
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}
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}
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};
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};
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