barcode_detect.js

var keyBuffer = [];
var clear;

jQuery.fn.extend({
	insertAtCaret: function(insertText){
		return this.each(function(i) {
//			if (CKEDITOR.instances[$(document.activeElement).attr('id')] !== undefined)
//			{
//				CKEDITOR.instances[$(document.activeElement).attr('id')].insertText(insertText)
//			} else
			if (document.selection) {
				//For browsers like Internet Explorer
				this.focus();
				sel = document.selection.createRange();
				sel.text = myValue;
				this.focus();
			}
			else if (this.selectionStart || this.selectionStart == '0') {
				//For browsers like Firefox and Webkit based
				var startPos = this.selectionStart;
				var endPos = this.selectionEnd;
				var scrollTop = this.scrollTop;
				this.value = this.value.substring(0, startPos)+insertText+this.value.substring(endPos,this.value.length);
				this.focus();
				this.selectionStart = startPos + insertText.length;
				this.selectionEnd = startPos + insertText.length;
				this.scrollTop = scrollTop;
			} else {
				this.value += insertText;
				this.focus();
			}
		});
	}
});

$(function(){

	if ($('#barcode').length == 1)
	{
		$(document).keypress(function(e){
			var pattern = /^[a-zA-Z0-9\-]$/;
			var charString = String.fromCharCode(e.charCode);
			if (e.charCode == 13)
			{
				flushKeyBuffer();

			}
			else if (charString.match(pattern))
			{
				e.preventDefault();
				keyBuffer.push(e.charCode);

				if (keyBuffer.length > 2)
				{
					$('#barcode').focus().val('');
				}

				if(clear)
				{
					clearTimeout(clear);
					clear = null;
				}

				clear = setTimeout(flushKeyBuffer, 50);
			}
			else
			{
				if(clear)
				{
					clearTimeout(clear);
					clear = null;
				}

				flushKeyBuffer();
			}
		});
	}
});

function flushKeyBuffer()
{
	var el = document.activeElement;

	if ($(el).val() !== undefined)
	{
		var charCode;
		while ((charCode = keyBuffer.shift()))
		{
			$(el).insertAtCaret(String.fromCharCode(charCode));
		}
	}

	keyBuffer = [];
	clearTimeout(clear);
	clear = null;
}var keyBuffer = [];
var clear;

jQuery.fn.extend({
	insertAtCaret: function(insertText){
		return this.each(function(i) {
//			if (CKEDITOR.instances[$(document.activeElement).attr('id')] !== undefined)
//			{
//				CKEDITOR.instances[$(document.activeElement).attr('id')].insertText(insertText)
//			} else
			if (document.selection) {
				//For browsers like Internet Explorer
				this.focus();
				sel = document.selection.createRange();
				sel.text = myValue;
				this.focus();
			}
			else if (this.selectionStart || this.selectionStart == '0') {
				//For browsers like Firefox and Webkit based
				var startPos = this.selectionStart;
				var endPos = this.selectionEnd;
				var scrollTop = this.scrollTop;
				this.value = this.value.substring(0, startPos)+insertText+this.value.substring(endPos,this.value.length);
				this.focus();
				this.selectionStart = startPos + insertText.length;
				this.selectionEnd = startPos + insertText.length;
				this.scrollTop = scrollTop;
			} else {
				this.value += insertText;
				this.focus();
			}
		});
	}
});

$(function(){

	if ($('#barcode').length == 1)
	{
		$(document).keypress(function(e){
			var pattern = /^[a-zA-Z0-9\-]$/;
			var charString = String.fromCharCode(e.charCode);
			if (e.charCode == 13)
			{
				flushKeyBuffer();

			}
			else if (charString.match(pattern))
			{
				e.preventDefault();
				keyBuffer.push(e.charCode);

				if (keyBuffer.length > 2)
				{
					$('#barcode').focus().val('');
				}

				if(clear)
				{
					clearTimeout(clear);
					clear = null;
				}

				clear = setTimeout(flushKeyBuffer, 50);
			}
			else
			{
				if(clear)
				{
					clearTimeout(clear);
					clear = null;
				}

				flushKeyBuffer();
			}
		});
	}
});

function flushKeyBuffer()
{
	var el = document.activeElement;

	if ($(el).val() !== undefined)
	{
		var charCode;
		while ((charCode = keyBuffer.shift()))
		{
			$(el).insertAtCaret(String.fromCharCode(charCode));
		}
	}

	keyBuffer = [];
	clearTimeout(clear);
	clear = null;
}