Mercurial > pub > ImplabJs
view core/src/js/components/StateMachine.js @ 29:acdcdf1a8d21
repository reorganized
author | cin |
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date | Tue, 26 Jun 2018 19:35:44 +0300 |
parents | src/implab/components/StateMachine.js@7d7059d2a810 |
children |
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define([ "dojo/_base/declare", "../safe", "../text/format" ], function(declare, safe, format) { return declare(null, { states : null, current : null, constructor : function(opts) { safe.argumentNotNull(opts, "opts"); safe.argumentNotNull(opts.states, "opts.states"); safe.argumentNotNull(opts.initial, "opts.initial"); this.states = opts.states; this.current = opts.initial; if (safe.isNull(this.states[this.current])) throw new Error("Invalid initial state " + this.current); }, move : function(input, noThrow) { safe.argumentNotNull(input, "input"); var next = this.states[this.current][input]; if(safe.isNull(next)) { if (noThrow) return false; else throw new Error(format("Invalid transition {0}-{1}->?", this.current, input)); } else { this.current = next; return true; } } }); });