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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<!-- Bootstrap template from https://blackrockdigital.github.io/startbootstrap-freelancer/ -->
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="">
<meta name="author" content="">
<title>CKY Parser</title>
<!-- Bootstrap Core CSS -->
<link href="vendor/bootstrap/css/bootstrap.min.css" rel="stylesheet">
<!-- Theme CSS -->
<link href="css/freelancer.min.css" rel="stylesheet">
<!-- Custom Fonts -->
<link href="vendor/font-awesome/css/font-awesome.min.css" rel="stylesheet" type="text/css">
<link href="https://fonts.googleapis.com/css?family=Montserrat:400,700" rel="stylesheet" type="text/css">
<link href="https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic" rel="stylesheet" type="text/css">
<!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
<script src="https://oss.maxcdn.com/libs/respond.js/1.4.2/respond.min.js"></script>
<![endif]-->
<script type="text/javascript">
function array_index_of(a, e) {
if (a != null) {
for (var i = 0; i < a.length; ++i) {
if (a[i] == e)
return i;
}
}
return -1;
}
function merge_arrays(a, b) {
for (var i = 0; i < b.length; ++i) {
if (array_index_of(a, b[i]) == -1) {
a.push(b[i]);
}
}
}
function Grammar(grammar) {
this._terminal_rules = new Array();
this._non_terminal_rules = new Array();
var re_rule = /^(\w+)\s*->\s*(\w+)(?:\s+(\w+))?\s*\.?$/;
grammar = grammar.split(/\r?\n/);
for (var i = 0; i < grammar.length; ++i) {
var r = grammar[i];
if (r.length == 0)
continue;
var a = re_rule.exec(r);
if (a == null)
throw "bad rule syntax: " + r;
if (a[3]) {
var new_rule = new Array(a[1], a[2], a[3]);
this._non_terminal_rules.push(new_rule);
if (this._s == null)
this._s = new String(a[1]);
}
else
{
var new_rule = new Array(a[1], a[2]);
this._terminal_rules.push(new_rule);
}
}
this.start_symbol = function() { return this._s; }
this.left_hand_sides = function(s) {
var res = new Array();
for (var i = 0; i < this._terminal_rules.length; ++i) {
var r = this._terminal_rules[i];
if (r[1] == s)
res.push(r[0]);
}
return res;
}
this.left_hand_sides2 = function(s, t) {
var res = new Array();
for (var i = 0; i < this._non_terminal_rules.length; ++i) {
var r = this._non_terminal_rules[i];
if (r[1] == s && r[2] == t)
res.push(r[0]);
}
return res;
}
return this;
}
function tokenize_sentence(sentence) {
var s = sentence.split(/\s+/);
return s;
}
function allocate_chart(N) {
var c = new Array(N + 1);
c[0] = new Array(N);
for (var i = 1; i <= N; ++i) {
c[i] = new Array(N - (i - 1));
}
return c;
}
function cky_offline(grammar, sentence, eh) {
var G = new Grammar(grammar);
var S = tokenize_sentence(sentence);
var N = S.length;
var C = allocate_chart(N);
eh.start(S);
for (var j = 0; j < N; ++j) {
eh.active_cell_changed(0, j);
C[0][j] = G.left_hand_sides(S[j]);
eh.cell_updated(0, j, C[0][j]);
}
for (var i = 1; i < N; ++i) {
for (var j = 0; j < N - i; ++j) {
var nt = C[i][j];
eh.active_cell_changed(i, j);
for (var k = i - 1; k >= 0; --k) {
var nts1 = C[k][j];
var nts2 = C[i - k - 1][j + k + 1];
eh.attempt_match(k, j, i - k - 1, j + k + 1);
if (nts1 != null && nts2 != null) {
for (var ii = 0; ii < nts1.length; ++ii) {
var nt1 = nts1[ii];
for (var jj = 0; jj < nts2.length; ++jj) {
var nt2 = nts2[jj];
var rhss = G.left_hand_sides2(nt1, nt2);
if (rhss == 0 || rhss.length == 0)
continue;
if (nt == null) {
nt = new Array();
C[i][j] = nt;
}
foundString = 1;
merge_arrays(nt, rhss);
eh.found_match(k, j, i - k - 1, j + k + 1);
eh.cell_updated(i, j, nt);
}
}
}
}
}
}
var accepted = array_index_of(C[N - 1][0], G.start_symbol()) != -1;
eh.end(accepted);
return accepted;
}
</script>
<script>
//var COLOR_NORMAL_CELL = "#FFFFCC";
var COLOR_NORMAL_CELL = "#A9A9F5";
var COLOR_ACTIVE_CELL = "red";
var COLOR_TEST_CELL = "gray";
var COLOR_MATCH_CELL = "blue";
var COLOR_UPDATE_CELL = "pink";
var UPDATE_INTERVAL = 1;
var _update_actions = new Array();
var _update_action_idx = 0;
var _active_cell = [-1,-1];
var _context_cells = [-1,-1,-1,-1];
var _update_timer_id = -1;
var _is_animation_running = false;
function paint_cell(i, j, color) {
var cell = entry2cell(i, j);
cell.bgColor = color;
cell.padding = "10px";
}
function dump_object(o) {
var s = "";
for (var p in o) { s += p + ":" + o[p] + "; "; }
alert('Error :'+s);
}
function update_ui(idx) {
var action = _update_actions[idx];
eval(action);
}
function set_entry_content(i, j, content) {
var cell = entry2cell(i, j);
cell.innerHTML = content;
}
function entry2cell(i, j) {
return tchart.rows.item(tchart.rows.length - 1 - i).cells.item(j);
}
function gotoInput() {
window.history().back();
}
function do_parse() {
var cky_event_handler = new Object();
cky_event_handler.start = function(s) {
// clear_chart();
create_chart(s);
set_sentence(s);
cky_input.style.display = "none";
cky_input_table.style.display = "none";
cky_output.style.display = "block";
//delete_chart();
cky_output.focus();
}
cky_event_handler.end = function(accepted) {
var s = "paint_cell("+_context_cells[0]+","+_context_cells[1]+",COLOR_NORMAL_CELL);";
s += "paint_cell("+_context_cells[2]+","+_context_cells[3]+",COLOR_NORMAL_CELL);";
s += "paint_cell("+_active_cell[0]+","+_active_cell[1]+",COLOR_NORMAL_CELL);";
_update_actions.push(s);
_update_action_idx = 0;
while( _update_action_idx < _update_actions.length){
update_ui(_update_action_idx);
_update_action_idx++;
}
}
cky_event_handler.cell_updated = function(i, j, content) {
_update_actions.push("paint_cell("+i+","+j+",COLOR_ACTIVE_CELL);" +
"set_entry_content("+i+","+j+",\""+content +"\");");
}
cky_event_handler.active_cell_changed = function(i, j) {
var s = "";
if (_context_cells[0] != -1) {
s += "paint_cell("+_context_cells[0]+","+_context_cells[1]+",COLOR_NORMAL_CELL);";
s += "paint_cell("+_context_cells[2]+","+_context_cells[3]+",COLOR_NORMAL_CELL);";
}
if (_active_cell[0] != -1) {
s += "paint_cell("+_active_cell[0]+","+_active_cell[1]+",COLOR_NORMAL_CELL);";
}
s += "paint_cell("+i+","+j+",COLOR_ACTIVE_CELL);";
_active_cell[0] = i;
_active_cell[1] = j;
_update_actions.push(s);
}
cky_event_handler.attempt_match = function(i, j, k, l) {
var s = "";
if (_context_cells[0] != -1) {
s += "paint_cell("+_context_cells[0]+","+_context_cells[1]+",COLOR_NORMAL_CELL);";
s += "paint_cell("+_context_cells[2]+","+_context_cells[3]+",COLOR_NORMAL_CELL);";
}
s += "paint_cell("+i+","+j+",COLOR_TEST_CELL);";
s += "paint_cell("+k+","+l+",COLOR_TEST_CELL);";
_update_actions.push(s);
_context_cells[0] = i;
_context_cells[1] = j;
_context_cells[2] = k;
_context_cells[3] = l;
}
cky_event_handler.found_match = function(i, j, k, l) {
var s = "";
s += "paint_cell("+i+","+j+",COLOR_MATCH_CELL);";
s += "paint_cell("+k+","+l+",COLOR_MATCH_CELL);";
s += "paint_cell("+_active_cell[0]+","+_active_cell[1]+",COLOR_MATCH_CELL);";
_update_actions.push(s);
}
try {
var result = cky_offline(idgram.value, idsen.value, cky_event_handler)
if( result == true) {
alert('The Sentence is Derivable by the Current Grammar');
} else {
alert('The Sentence is not Derivable by the Current Grammar' );
}
}
catch (e) {
alert('Error :'+e);
//alert('Please Enter the Text');
return;
}
}
function create_chart(s) {
var n = s.length;
var tb = tchart.firstChild;
if (tb == null || typeof(tb) == 'undefined') {
tb = document.createElement("TBODY");
tchart.appendChild(tb);
}
for (var i = 0; i < n; ++i) {
//for (var i = n; i > 0; --i) {
var row = document.createElement("TR");
tb.appendChild(row);
//for (var j = 0; j <= i; j++) {
for (var j = i; j >= 0; j--) {
var cell = document.createElement("TD");
row.appendChild(cell);
//cell.setAttribute("width", (1 / n) * 50.00 + "%");
//row.setAttribute("width", (1/n) * 100.00 + "%");
cell.setAttribute("width", (1/n) * 50.00 + "%");
cell.setAttribute("align", "center");
cell.setAttribute("bgColor", COLOR_NORMAL_CELL);
//cell.setAttribute("bgColor", "#A9A9F0");
cell.innerHTML = " ";
}
}
}
function set_sentence(s) {
var n = s.length;
var tb = tsentence.firstChild;
if (tb == null || typeof(tb) == 'undefined') {
tb = document.createElement("TBODY");
tsentence.appendChild(tb);
}
var row = document.createElement("TR");
tb.appendChild(row);
for (var i = 0; i < n; ++i) {
//for (var i = n; i > 0; i--) {
var cell = document.createElement("TD");
row.appendChild(cell);
cell.setAttribute("width", (1/ n) * 50.00 + "%");
cell.setAttribute("align", "center");
cell.setAttribute("bgColor", "#D8E8D8");
cell.innerHTML = s[i];
}
}
function delete_chart() {
cky_input.style.display = "block";
cky_input_table.style.display = "block";
cky_output.style.display = "none";
clearInterval(_update_timer_id);
_update_actions = new Array();
tchart.removeChild(tchart.firstChild);
tsentence.removeChild(tsentence.firstChild);
}
function clear_chart() {
var cells = tchart.getElementsByTagName("TD");
for (var i = 0; i < cells.length; ++i) {
cells[i].innerHTML = " ";
}
}
</script>
<style>
.parsetable
{
margin:0px auto;
}
.parsetable, .parsetable tr, .parsetable td
{
background-color: #eee;
}
.parsetable td
{
padding: 10px;
}
#tchart td
{
border: solid 1px black;
padding: 10px;
}
</style>
</head>
<body id="page-top" class="index">
<div id="skipnav"><a href="#maincontent">Skip to main content</a></div>
<!-- Navigation -->
<nav id="mainNav" class="navbar navbar-default navbar-fixed-top navbar-custom">
<div class="container">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header page-scroll">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
<span class="sr-only">Toggle navigation</span> Menu <i class="fa fa-bars"></i>
</button>
<a class="navbar-brand" href="#page-top">CSCI 549 - Automata Theory</a>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav navbar-right">
<li class="hidden">
<a href="#page-top"></a>
</li>
<li class="page-scroll">
<a href="#portfolio">Parser</a>
</li>
<li class="page-scroll">
<a href="#about">Sentences</a>
</li>
</ul>
</div>
<!-- /.navbar-collapse -->
</div>
<!-- /.container-fluid -->
</nav>
<!-- Header -->
<header>
<div class="container" id="maincontent" tabindex="-1">
<div class="row">
<div class="col-lg-12">
<img class="img-responsive" src="img/profile.png" alt="">
<div class="intro-text">
<h1 class="name">Final Project</h1><h2>CSCI 549 - Automata Theory</h2>
<hr class="star-light">
<h4><span class="skills">Abhijeet Chopra</span></h4>
</div>
</div>
</div>
</div>
</header>
<!-- Portfolio Grid Section -->
<section id="portfolio">
<div class="container">
<div class="row">
<div class="col-lg-12 text-center">
<h2>Parser</h2>
<hr class="star-primary">
</div>
</div>
<div class="row">
<div class="col-lg-12 text-center">
<div id="cky_output" style="display:none; width:10%; margin:0 auto;" tabindex="1">
<input class="btn btn-success btn-lg" onclick="location.reload();" type="button" value="RESET">
<br>
<br>
<br>
<br>
<table class="" border="0" id="tchart" width=""></table>
<table class="" id="tsentence" width=""></table>
<br/>
</div>
<table id="cky_input_table" class="table-bordered table-responsive parsetable" width="100%">
<tr>
<td>
<div id="cky_input" style="display:block">
<center>
<h3>CNF Grammar</h3>
<textarea cols="40" id="idgram" rows="20" style="background:white">
S -> NP VP
S -> Verb NP
S -> X2 PP
S -> Verb PP
S -> VP PP
S -> was
S -> gave
S -> gives
S -> told
S -> slowly
S -> found
S -> thought
S -> ordered
NP -> There
NP -> It
NP -> big
NP -> cheap
NP -> goods
NP -> He
NP -> the
NP -> her
NP -> timely
NP -> expensive
NP -> children
NP -> FedEx
NP -> heavy
NP -> Det Nominal
Nominal -> Nominal Noun
Nominal -> Nominal PP
Nominal -> beautiful
Nominal -> feasible
Nominal -> parcel
Nominal -> weight
Nominal -> far
Nominal -> location
Nominal -> little
Nominal -> belonged
Nominal -> envelope
Nominal -> important
Nominal -> warehouse
VP -> was
VP -> gave
VP -> gives
VP -> told
VP -> slowly
VP -> found
VP -> thought
VP -> ordered
VP -> Verb NP
VP -> X2 PP
X2 -> Verb NP
VP -> Verb PP
VP -> VP PP
PP -> Preposition NP
Verb -> was
Verb -> gave
Verb -> gives
Verb -> told
Verb -> slowly
Verb -> found
Verb -> thought
Verb -> ordered
Det -> a
Det -> The
Det -> the
Det -> her
Det -> send
Det -> reached
Det -> seven
Det -> they
Noun -> document
Noun -> discount
Noun -> away
Noun -> beds
Noun -> beautiful
Noun -> feasible
Noun -> parcel
Noun -> weight
Noun -> far
Noun -> location
Noun -> little
Noun -> belonged
Noun -> envelope
Noun -> important
Noun -> warehouse
Preposition -> named
Preposition -> and
Preposition -> in
Preposition -> into
Preposition -> to
Preposition -> send
</textarea>
</center>
</div>
</td>
<td>
<center>
<h3>Enter the String</h3>
<br>
<br>
<input id="idsen" size="50" type="text" value="">
<br>
<p>
<br/>
<input onclick="do_parse();" style="width:150px;height:50px" type="image" class="btn btn-success btn-lg">
</p>
</center>
</td>
</tr>
</table>
</div>
</div>
</div>
</section>
<!-- About Section -->
<section class="success" id="about">
<div class="container">
<div class="row">
<div class="col-lg-12 text-center">
<h2>Sentences</h2>
<hr class="star-light">
</div>
</div>
<div class="row">
<div class="col-lg-8 col-lg-offset-2 text-center">
<h3>Derivable Sentences</h3>
<ol>
<li>It was big and cheap</li>
<li>FedEx gave a feasible discount</li>
<li>The parcel was heavy in the weight</li>
<li>He told her to send far away</li>
<li>FedEx gives goods into the warehouse</li>
<li>It was timely and expensive</li>
<li>It slowly reached location</li>
</ol>
<h3>Non derivable Sentences</h3>
<ol>
<li>She ordered her envelope to send the important document</li>
<li>But the envelope could not cover FedEx</li>
<li>But soon she found shipment in front of a table</li>
</ol>
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