/**
*
* Class Searcher - a simple class for search in flash content
* @autor Osiris LMS http://login.osirislms.com
* @version 1.1
*
*/
class utils.Searcher {
	private var stExactValue, stValue, stValueLow;
	private var index, indexAll, rsValue, rsValueAll, allCoincidence;
	private var matchCase, diffEx, diffUC, txValue;

	function Searcher(txValue:Object, diffUC:Boolean, diffEx:Boolean, allCoincidence:Boolean) {
		index = 0;
		this.txValue = txValue;
		this.diffUC = diffUC;
		this.diffEx = diffEx;
		this.allCoincidence = allCoincidence;
	}

	public function getCoincidence(keyword) {
		if (keyword != "") {
			stValue = txValue.text;
			stValueLow = txValue.text.toLowerCase();
			do {
				if (diffUC == true) {
					rsValue = stValue.indexOf(keyword, index);
				} else if (diffUC == false) {
					rsValue = stValueLow.indexOf(keyword.toLowerCase(), index);
				}
				if (diffEx == true) {
					stExactValue = stValue.substr(stValue.indexOf(keyword, index)-1, keyword.length+2);
					matchCase = getExactCoincidence(stExactValue);
				} else if (diffEx == false) {
					matchCase = false;
				}

				if (rsValue == -1) {
					index = 0;
					matchCase = true;
				} else if (rsValue != -1 && matchCase == true && diffEx == true) {
					index = rsValue+keyword.length;
					break;
				} else if (rsValue != -1 && matchCase == false && diffEx == true) {
					index = rsValue+keyword.length;
					matchCase = true;
				} else if (rsValue != -1 && diffEx == false) {
					index = rsValue+keyword.length;
				}
			} while (rsValue != -1 && matchCase == true);
			setSelection(keyword);
			return (allCoincidence)?getTotalCoincidence(keyword):0;
		}
	}
	public function setSelection(keyword) {
		if (rsValue != -1) {
			Selection.setFocus(txValue);
			Selection.setSelection(rsValue, rsValue+keyword.length);
		}
	}

	public function getTotalCoincidence(keyword:String) {
		var totalCoincidence = 0;
		var indexAll = 0;
			do {
				if (diffUC == true) {
					rsValueAll = stValue.indexOf(keyword, indexAll);
				} else if (diffUC == false) {
					rsValueAll = stValueLow.indexOf(keyword.toLowerCase(), indexAll);
				}
				if (diffEx == true) {
					stExactValue = stValue.substr(stValue.indexOf(keyword, indexAll)-1, keyword.length+2);
					matchCase = getExactCoincidence(stExactValue);
				} else if (diffEx == false) {
					matchCase = true;
				}

				if (rsValueAll == -1) {
					indexAll = 0;
				} else if (rsValueAll != -1 && matchCase == true) {
					totalCoincidence++;
					indexAll = rsValueAll+keyword.length;
				} else if (rsValueAll != -1 && matchCase == false) {
					indexAll = rsValueAll+keyword.length;
				}
			} while (rsValueAll != -1);
		return totalCoincidence;
	}

	private function getExactCoincidence() {
		var exValue = true;
		var fsValue = true;
		var lsValue = true;
		var frst = stExactValue.substr(0, 1);
		var lst = stExactValue.substr(stExactValue.length-1, 1);
		
		if ((frst.charCodeAt(0)>=65 && frst.charCodeAt(0)<=90) || (frst.charCodeAt(0)>=97 && frst.charCodeAt(0)<=122)) {
			fsValue = false;
		}
		if ((lst.charCodeAt(0)>=65 && lst.charCodeAt(0)<=90) || (lst.charCodeAt(0)>=97 && lst.charCodeAt(0)<=122)) {
			lsValue = false;
		}
		if (fsValue == true && lsValue == true) {
			exValue = true;
		} else {
			exValue = false;
		}
		return exValue;
	}

}