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| class window.Bus | |
| constructor: -> | |
| @dispatcher = {} | |
| subscribe: (pattern, handler) -> | |
| handlers = @dispatcher[pattern] || [] | |
| handlers.push handler | |
| @dispatcher[pattern] = handlers | |
| publish: (e) -> | |
| for pattern, handlers of @dispatcher when new RegExp(pattern).test e.type | |
| for handler in handlers || [] | |
| handler(e) |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| </head> | |
| <body> | |
| <div data-bind="with: person"> | |
| The name is <span data-bind="text: name"></span> | |
| </div> | |
| <div data-bind="with: command"> | |
| <form data-bind="submit: submit"> | |
| <input type="text" data-bind="value: name" ><button type="submit">Submit</button><button data-bind="click: undo">Undo</button> | |
| </form> | |
| </div> | |
| <script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/knockout/3.1.0/knockout-min.js"></script> | |
| <script type="text/javascript"> | |
| window.Bus = (function() { | |
| Bus.name = 'Bus'; | |
| function Bus() { | |
| this.dispatcher = {}; | |
| } | |
| Bus.prototype.subscribe = function(pattern, handler) { | |
| var handlers; | |
| handlers = this.dispatcher[pattern] || []; | |
| handlers.push(handler); | |
| return this.dispatcher[pattern] = handlers; | |
| }; | |
| Bus.prototype.publish = function(e) { | |
| var handler, handlers, pattern, _ref, _results; | |
| _ref = this.dispatcher; | |
| _results = []; | |
| for (pattern in _ref) { | |
| handlers = _ref[pattern]; | |
| if (new RegExp(pattern).test(e.type)) { | |
| _results.push((function() { | |
| var _i, _len, _ref1, _results1; | |
| _ref1 = handlers || []; | |
| _results1 = []; | |
| for (_i = 0, _len = _ref1.length; _i < _len; _i++) { | |
| handler = _ref1[_i]; | |
| _results1.push(handler(e)); | |
| } | |
| return _results1; | |
| })()); | |
| } | |
| } | |
| return _results; | |
| }; | |
| return Bus; | |
| })(); | |
| </script> | |
| <script type="text/javascript"> | |
| (function(ko, bus){ | |
| var eventLog = []; | |
| var vm = { | |
| person: { | |
| name: ko.observable() | |
| }, | |
| command: { | |
| name: ko.observable(), | |
| submit: function(){ | |
| bus.publish({type: "nameChanged", name: this.name()}); | |
| }, | |
| undo: function() { | |
| var events = eventLog.slice(0, -1); | |
| eventLog.length = 0; | |
| events.forEach(function(e){ | |
| bus.publish(e); | |
| }); | |
| } | |
| } | |
| }; | |
| bus.subscribe("nameChanged", function(e){ | |
| vm.person.name(e.name); | |
| }); | |
| bus.subscribe("_init", function(){ | |
| vm.person.name(""); | |
| }); | |
| bus.subscribe(".*", function(e){ | |
| eventLog.push(e); | |
| }); | |
| ko.applyBindings(vm); | |
| bus.publish({type: "_init"}); | |
| })(ko, new window.Bus()); | |
| </script> | |
| </body> | |
| </html> |
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