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turing.html
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<!DOCTYPE html>
<html lang="en-US">
<head>
<title>Turing Machines</title>
<link rel="stylesheet" href="main.css">
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.8/angular.min.js"></script>
</head>
<body ng-app="turingform" ng-controller="MachineController">
<span>Settings</span>
<form name="form" novalidate ng-cloak ng-submit="run()">
<div id="settings">
<label>Alphabet:
<input type="text" ng-model="alphabet" name="alphabet" ng-change="check_alphabet()" alphabet required/>
<span class="warning">
<span ng-show="form.$submitted || form.alphabet.$touched">
<span ng-show="form.alphabet.$error.required">Alphabet cannot be empty!</span>
</span></span>
</label>
<label>Amout of steps:
<input type="number" ng-model="size" name="size" min="1" max="200" integer required/>
<span class="warning">
<span ng-show="form.$submitted || form.size.$touched">
<span ng-show="form.size.$error.integer">The value is not number!</span>
<span ng-show="form.size.$error.min || form.size.$error.max"> Wrong amount of steps. 200 is maximum</span>
<span ng-show="form.size.$error.required">Amount of steps cannot be empty!</span>
</span></span>
</label>
<label>Tape: <input type="text" ng-model="tape" name="tape" inalphabet required/>
<span class="warning">
<span ng-show="form.$submitted || form.tape.$touched">
<span ng-show="form.tape.$error.required">Tape cannot be empty!</span>
<span ng-show="form.tape.$error.tape">Tape includes symbols that are not in alphabet.</span>
</span></span>
</label>
</div>
<span>Program</span>
<div id="prog">
<div ng-repeat="lines in programm" ng-class-odd="'fullfield2'" ng-class-even="'fullfield'"> State {{$index}} :
<table ng-repeat="(key, item) in lines">
<tr>
<td class="smallfield">{{key}}</td>
<td class="smallfield"><input type="text" ng-model="item.write" name="item.write" maxlength="1" inalphabet /></td>
<td class="smallfield"><input type="text" ng-model="item.move" name="item.move" maxlength="1" ng-pattern="/r|R|L|l|N|n/" /></td>
<td class="smallfield2"><input type="number" ng-model="item.state" name="item.state" maxlength="2" integer min="0" max="{{programm.length}}" /></td>
</tr>
</table>
</div>
</div>
<div id="buttons">
<input type="button" ng-click="addstate()" value="+" />
<input type="button" ng-click="removestate()" value="-" />
<input type="submit" value="Run program" />
</div>
</form>
<span>Data:</span>
<div id="results" ng-cloak>
<span>Alphabet - {{ alphabet }} </span>
<span>Amount of steps - {{ size }} </span>
<span>Tape - {{ tape }} </span>
<span>Logs(Next state of machine and current result on tape): </span>
<div id="logs">
<div ng-repeat="line in workinglog">
<div class="log">{{line[0]}}</div>
<div class="log2">{{line[1].join("")}}</div>
</div>
</div>
</div>
</body>
</html>
<script>
(function(angular) {
'use strict';
var app = angular.module('turingform', []);
var INTEGER_REGEXP = /^\-?\d+$/;
var INALPHABET_REGEXP = /^$/;
var programm = [];
var workingtape = [];
var workinglog = [];
//validation of integer
app.directive('integer', function() {
return {
require: 'ngModel',
link: function(scope, elm, attrs, ctrl) {
ctrl.$validators.integer = function(modelValue, viewValue) {
if (ctrl.$isEmpty(modelValue)) {
// consider empty models to be valid
return true;
}
if (INTEGER_REGEXP.test(viewValue)) {
// it is valid
return true;
}
// it is invalid
return false;
};
}
};
});
//validation of tape
app.directive('inalphabet', function() {
return {
require: 'ngModel',
link: function(scope, elm, attrs, ctrl) {
ctrl.$validators.tape = function(modelValue, viewValue) {
if (ctrl.$isEmpty(modelValue)) {
return true;
}
if (INALPHABET_REGEXP.test(viewValue)) {
return true;
}
return false;
};
}
};
});
//array for log (removing empty elements from array)
function logarray(arr){
var logtape = [];
for (var i in arr){
if ((arr[i] != null) && (arr[i] != undefined)){
logtape.push(arr[i]);
}
}
return logtape;
}
//setting tape and logs ready for running. working tape have maximum lenght it made just in case if there would be added extra features later.
function machineinit(maxturns,tape){
workingtape = [];
workinglog = [];
workingtape.length = maxturns;
workingtape=[].concat(workingtape,tape.split(""));
workingtape.length = maxturns*2;
}
//one movement of machine
function machineturn(cur_position, state, turn){
if (workingtape[cur_position] == undefined){
window.alert("Unexpected symbol on tape");
return [cur_position,-1,0];
}
var newstate = programm[state][workingtape[cur_position]]["state"];
if (newstate == null) {
window.alert("There is error somewhere programm went to undefined state");
return [cur_position,-1,0];
}
workingtape[cur_position]=programm[state][workingtape[cur_position]]["write"];
if (programm[state][workingtape[cur_position]]["move"].toUpperCase()=="L"){
cur_position--;
}
else if (programm[state][workingtape[cur_position]]["move"].toUpperCase()=="R"){
cur_position++;
};
turn--;
return [cur_position,newstate,turn];
}
//full run of machine (all movements)
function machinerun(turn){
var cur_position=turn;
var state = 0;
do{
var results = machineturn(cur_position,state,turn);
cur_position=results[0];
state=results[1];
turn=results[2];
if (state != -1){
workinglog.push([state, logarray(workingtape)]);
}
} while ((turn > 0) && (state != programm.length));
}
//sorting and remvoing repeated elements in array
function originals (letters){
letters.sort();
for (var i = letters.length-1; i>=0; i--){
if (letters[0]!=letters[letters.length-1]) {
letters.unshift(letters.pop());
}
else if (letters.length>1) {
letters.pop();
}
}
letters.sort()
return letters;
}
//adding one more state.
function addstate1(letters){
var alphabet = letters.split("");
var tmp = {};
for (var line in alphabet) {
var a ={};
a.write = a.move = "";
a.state= null;
tmp[alphabet[line]] = a;
}
programm.push(tmp);
}
app.controller('MachineController', ['$scope', function($scope) {
//validation of alphabeth and making regular expression for checking symbols in tape
$scope.check_alphabet = function() {
$scope.alphabet = originals($scope.alphabet.split("")).join("");
INALPHABET_REGEXP = new RegExp('^['+$scope.alphabet+']+$');
};
//main function of program
$scope.run = function() {
if ($scope.form.$valid) {
machineinit($scope.size, $scope.tape);
machinerun($scope.size);
$scope.workinglog=workinglog;
}
};
//adding one more state to "programm"
$scope.addstate = function() {
if ($scope.alphabet != ""){
addstate1($scope.alphabet);
};
$scope.programm = programm;
};
//removing state from "programm"
$scope.removestate = function() {
if (programm.length > 1){
programm.pop();
};
$scope.programm = programm;
};
}]);
})(window.angular);
</script>