dojo_app/js/library/dojox/editor/tests/spellCheck.php.disabled

<?php
	require("PorterStemmer.php");
	
	class Word{
		public $text;
		public $suggestion;
	}
	
	class SpellDic{
		// $fileName [String]
		//		The dictionary file name
		private $fileName = "wordlist.txt";
		
		// $_lang [String]
		//		The target language
		private $_lang;
		
		// $_encoding [String]
		//		The encoding
		private $_encoding;
		
		// $_words [Array<Word>]
		//		The word list to be checked
		private $_words;
		
		// $_dic [Array]
		//		The array that mimic the dictionary. It can be more
		//		sophisticated. However, this is only a demo.
		private $_dic;
		
		// SIMI [Number]
		//		The threshold of  the similarity
		const SIMI = 0.6;
		
		public function __construct(){
			$this->_dic = explode("\n", file_get_contents($this->fileName));
		}
		
		public function setLanguage($lang){
			$this->_lang = $lang;
		}
		
		public function setEncoding($encoding){
			$this->_encoding = $encoding;
		}
		
		public function setWords($words){
			$this->_words = $words;
		}
		
		public function add($word){
			$handle = fopen($this->fileName, 'a');
			fwrite($handle, "$word\n");
			fclose($handle);
			return "{response:[]}";
		}
		
		public function check(){
			// summary:
			//		Check the spelling and return a HTML page with a JSON string like
			//			{response: [
			//				{ 
			//					text :"teest", 
			//					suggestion:["test","treat"]
			//				}
			//			]}
			if($this->_lang == "EN"){
				$len = count($this->_words);
				for($i = 0; $i < $len; $i++){
					$this->_words[$i]->suggestion = $this->lookup($this->_words[$i]->text);
				}
				$temp = array();
				for($i = 0; $i < $len; $i++){
					if($this->_words[$i]->suggestion !== NULL){
						array_push($temp, $this->_words[$i]);
					}
				}
				return "{response:" . json_encode($temp). "}";
			}else{
				// This is only a demo, so keep the text as-is
				// if the encoding is not UTF-8 or the language is
				// not English
				return "{response:[]}"; // No spelling error found
			}
		}
		
		private function lookup($word){
			// summary:
			//		Look for the given word. If it is not found, a suggestion list
			//		will be returned, else an empty list will be returned.
			$len = count($this->_dic);
			$lst = array();
			for($i = 0; $i < $len; $i++){
				if($word == $this->_dic[$i] || PorterStemmer::getStem($word) == $this->_dic[$i]){
					return NULL;
				}else{
					// Compare the two words to get the similarity.
					$num = $this->_lcs($word, $this->_dic[$i]);
					if($num / strlen($word) > self::SIMI && $num / strlen($this->_dic[$i]) > self::SIMI){
						array_push($lst, $this->_dic[$i]);
					}
				}
			}
			return $lst;
		}
		
		private function _lcs($word1, $word2){
			// summary:
			//		Longest Common Subsequence
			/* $f[$i][$j] = max(f[$i-1][$j-1] + same($i, $j), f[$i-1][$j], f[$i][$j-1];*/
			$len1 = strlen($word1);
			$len2 = strlen($word2);
			for($i = 0; $i <= $len1; $i++){ $f[$i][0] = 0; }
			for($j = 0; $j <= $len2; $j++){ $f[0][$j] = 0; }
			for($i = 1; $i <= $len1; $i++){
				for($j = 1; $j <= $len2; $j++){
					$f[$i][$j] = max($f[$i - 1][$j - 1] + ($word1[$i - 1] == $word2[$j - 1] ? 1 : 0),
										max($f[$i - 1][$j], $f[$i][$j - 1]));
				}
			}
			return $f[$i - 1][$j - 1];
		}
	}
	
	function text2Words($text){
		$result = array();
		$words = explode (" ", $text);
		$len = count($words);
		for($i = 0; $i < $len; $i++){
			$word = new Word();
			$word->text = $words[$i];
			array_push($result, $word);
		}
		return $result;
	}
	
	header('Content-Type: text/html; charset=UTF-8');
	
	$sourceText = array_key_exists("content", $_REQUEST) ? $_REQUEST["content"] : "";
	$lang = array_key_exists("lang", $_REQUEST) ? $_REQUEST["lang"] : "EN";
	$action = array_key_exists("action", $_REQUEST) ? $_REQUEST["action"] : "query";
	$callback = array_key_exists("callback", $_REQUEST) ? $_REQUEST["callback"] : "callback";
	
	$dic = new SpellDic();
	$dic->setLanguage($lang);
	if($action == "query"){
		$dic->setWords(text2Words(trim($sourceText)));
		echo "$callback(" . $dic->check() . ");"; // JSONP Specification
	}else if ($action == "update"){
		echo "$callback(" . $dic->add($sourceText) . ");";
	}
?>