/* jquery html tag parser
/*
/* <div jq="cycle" jq:cycle="fx:'shuffle',easing:'backout',delay:-4000">
/*   <img src="/your/path/to/img01.gif" />
/*   <img src="/your/path/to/img02.gif" />
/*   <img src="/your/path/to/img03.gif" />
/* </div>
*/
(function($, prefix, jq){
  $[jq] = $({});
  $[jq].extend({
    invoke: function(nodes) {
      nodes.each(function(){
        var node = this;
        var funcs = $(node).attr(prefix).split(',');
        $(funcs).each(function(){
          var arg = $(node).attr(prefix + ":" + this);
          if(arg) {
            eval('var options = {' + arg + '}');
          } else {
            var options = {};
          }
          if($.fn[this]) {
            $(node)[this](options);
          }
        });
      });
    },
    invokeElement: function(node) {
      $[jq].invoke($("*[" + prefix + "]", node));
    }
  });
  $(document).ready(function(){
    $[jq].invokeElement(document);
  });
})(jQuery, "jq", "jq");


/***********************************************************
/* html truncate 
/***********************************************************
*/
(function($) {

  var trailing_whitespace = true;

  $.fn.truncate = function(options) {

    var opts = $.extend({}, $.fn.truncate.defaults, options);
    
    $(this).each(function() {

      var content_length = $.trim(squeeze($(this).text())).length;
      if (content_length <= opts.max_length)
        return;  // bail early if not overlong

      var actual_max_length = opts.max_length; 
      var truncated_node = recursivelyTruncate(this, actual_max_length);
      var full_node = $(this);

      truncated_node.insertAfter(full_node);
      // This is an ugly approximation for getting the last block tag:
      // we just pick the last <p> or else the container itself.
      truncated_node.find('p:last').add(truncated_node).eq(0).append(''+opts.more+'');
      full_node.hide();
    });
  }

  $.fn.truncate.defaults = {
    max_length: 100,
    more: '...'
  };

  function recursivelyTruncate(node, max_length) {
    return (node.nodeType == 3) ? truncateText(node, max_length) : truncateNode(node, max_length);
  }

  function truncateNode(node, max_length) {
    var node = $(node);
    var new_node = node.clone().html("");
    node.contents().each(function() {
      var remaining_length = max_length - new_node.text().length;
      if (remaining_length == 0) return;
      new_node.append(recursivelyTruncate(this, remaining_length));
    });
    return new_node;
  }

  function truncateText(node, max_length) {
    var text = squeeze(node.data);
    if (trailing_whitespace)  // remove initial whitespace if last text
      text = text.replace(/^ /, '');  // node had trailing whitespace.
    trailing_whitespace = !!text.match(/ $/);
    //return text.slice(0, max_length);
	return text.replace(new RegExp('^(.{'+max_length+',}?)\\b.*'), '$1')
  }

  // Collapses a sequence of whitespace into a single space.
  function squeeze(string) {
    return string.replace(/\s+/g, ' ');
  }

})(jQuery);

/***********************************************************/

jQuery.fn.center = function(params) {

		var options = {

			vertical: true,
			horizontal: true

		}
		op = jQuery.extend(options, params);

   return this.each(function(){

		//initializing variables
		var $self = jQuery(this);
		//get the dimensions using dimensions plugin
		var width = $self.width();
		var height = $self.height();
		//get the paddings
		var paddingTop = parseInt($self.css("padding-top"));
		var paddingBottom = parseInt($self.css("padding-bottom"));
		//get the borders
		var borderTop = parseInt($self.css("border-top-width"));
		var borderBottom = parseInt($self.css("border-bottom-width"));
		//get the media of padding and borders
		var mediaBorder = (borderTop+borderBottom)/2;
		var mediaPadding = (paddingTop+paddingBottom)/2;
		//get the type of positioning
		var positionType = $self.parent().css("position");
		// get the half minus of width and height
		var halfWidth = (width/2)*(-1);
		var halfHeight = ((height/2)*(-1))-mediaPadding-mediaBorder;
		// initializing the css properties
		var cssProp = {
			position: 'absolute'
		};

		if(op.vertical) {
			cssProp.height = height;
			cssProp.top = '50%';
			cssProp.marginTop = halfHeight;
		}
		if(op.horizontal) {
			cssProp.width = width;
			cssProp.left = '50%';
			cssProp.marginLeft = halfWidth;
		}
		//check the current position
		if(positionType == 'static') {
			$self.parent().css("position","relative");
		}
		//aplying the css
		$self.css(cssProp);


   });

};

/***********************************************************/

(function($){

	$.fn.alphanumeric = function(p) { 

		p = $.extend({
			ichars: "!@#$%^&*()+=[]\\\';,/{}|\":<>?~`. ",
			nchars: "",
			allow: "-"
		  }, p);	

		return this.each
			(
				function() 
				{

					if (p.nocaps) p.nchars += "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
					if (p.allcaps) p.nchars += "abcdefghijklmnopqrstuvwxyz";
					
					s = p.allow.split('');
					for ( i=0;i<s.length;i++) if (p.ichars.indexOf(s[i]) != -1) s[i] = "\\" + s[i];
					p.allow = s.join('|');
					
					var reg = new RegExp(p.allow,'gi');
					var ch = p.ichars + p.nchars;
					ch = ch.replace(reg,'');

					$(this).keypress
						(
							function (e)
								{
								
									if (!e.charCode) k = String.fromCharCode(e.which);
										else k = String.fromCharCode(e.charCode);
										
									if (ch.indexOf(k) != -1) e.preventDefault();
									if (e.ctrlKey&&k=='v') e.preventDefault();
									
								}
								
						);
						
					$(this).bind('contextmenu',function () {return false});
									
				}
			);

	};

	$.fn.numeric = function(p) {
	
		var az = "abcdefghijklmnopqrstuvwxyz";
		az += az.toUpperCase();

		p = $.extend({
			nchars: az
		  }, p);	
		  	
		return this.each (function()
			{
				$(this).alphanumeric(p);
			}
		);
			
	};
	
	$.fn.alpha = function(p) {

		var nm = "1234567890";

		p = $.extend({
			nchars: nm
		  }, p);	

		return this.each (function()
			{
				$(this).alphanumeric(p);
			}
		);
			
	};	

})(jQuery);