/**

 *  Version 2.1

 *      -Contributors: "mindinquiring" : filter to exclude any stylesheet other than print.

 *  Tested ONLY in IE 8 and FF 3.6. No official support for other browsers, but will

 *      TRY to accomodate challenges in other browsers.

 *  Example:

 *      Print Button: <div id="print_button">Print</div>

 *      Print Area  : <div class="PrintArea"> ... html ... </div>

 *      Javascript  : <script>

 *                       $("div#print_button").click(function(){

 *                           $("div.PrintArea").printArea( [OPTIONS] );

 *                       });

 *                     </script>

 *  options are passed as json (json example: {mode: "popup", popClose: false})

 *

 *  {OPTIONS} | [type]    | (default), values      | Explanation

 *  --------- | --------- | ---------------------- | -----------

 *  @mode     | [string]  | ("iframe"),"popup"     | printable window is either iframe or browser popup

 *  @popHt    | [number]  | (500)                  | popup window height

 *  @popWd    | [number]  | (400)                  | popup window width

 *  @popX     | [number]  | (500)                  | popup window screen X position

 *  @popY     | [number]  | (500)                  | popup window screen Y position

 *  @popTitle | [string]  | ('')                   | popup window title element

 *  @popClose | [boolean] | (false),true           | popup window close after printing

 *  @strict   | [boolean] | (undefined),true,false | strict or loose(Transitional) html 4.01 document standard or undefined to not include at all (only for popup option)

 */

(function($) {

    var counter = 0;

    var modes = { iframe : "iframe", popup : "popup" };

    var defaults = { mode     : modes.iframe,

                     popHt    : 500,

                     popWd    : 400,

                     popX     : 200,

                     popY     : 200,

                     popTitle : '',

                     popClose : false };



    var settings = {};//global settings



    $.fn.printArea = function( options )

        {

            $.extend( settings, defaults, options );



            counter++;

            var idPrefix = "printArea_";

            $( "[id^=" + idPrefix + "]" ).remove();

            var ele = getFormData( $(this) );



            settings.id = idPrefix + counter;



            var writeDoc;

            var printWindow;



            switch ( settings.mode )

            {

                case modes.iframe :

                    var f = new Iframe();

                    writeDoc = f.doc;

                    printWindow = f.contentWindow || f;

                    break;

                case modes.popup :

                    printWindow = new Popup();

                    writeDoc = printWindow.doc;

            }



            writeDoc.open();

            writeDoc.write( docType() + "<html>" + getHead() + getBody(ele) + "</html>" );

            writeDoc.close();



            printWindow.focus();

            printWindow.print();



            if ( settings.mode == modes.popup && settings.popClose )

                printWindow.close();

        }



    function docType()

    {

        if ( settings.mode == modes.iframe || !settings.strict ) return "";



        var standard = settings.strict == false ? " Trasitional" : "";

        var dtd = settings.strict == false ? "loose" : "strict";



        return '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01' + standard + '//EN" "http://www.w3.org/TR/html4/' + dtd +  '.dtd">';

    }



    function getHead()

    {

        var head = "<head><title>" + settings.popTitle + "</title>";

        $(document).find("link")

            .filter(function(){

                    return $(this).attr("rel").toLowerCase() == "stylesheet";

                })

            .filter(function(){ // this filter contributed by "mindinquiring"

                    var media = $(this).attr("media");

                    return (media.toLowerCase() == "" || media.toLowerCase() == "print")

                })

            .each(function(){

                    head += '<link type="text/css" rel="stylesheet" href="' + $(this).attr("href") + '" >';

                });

        head += "</head>";

        return head;

    }



    function getBody( printElement )

    {

        return '<body><div><h3>*Not an official course schedule. Current SJC students must access S.O.S. to officially register*</h3></div><div class="' + $(printElement).attr("class") + '">' + $(printElement).html() + '</div></body>';

    }



    function getFormData( ele )

    {

        $("input,select,textarea", ele).each(function(){

            // In cases where radio, checkboxes and select elements are selected and deselected, and the print

            // button is pressed between select/deselect, the print screen shows incorrectly selected elements.

            // To ensure that the correct inputs are selected, when eventually printed, we must inspect each dom element

            var type = $(this).attr("type");

            if ( type == "radio" || type == "checkbox" )

            {

                if ( $(this).is(":not(:checked)") ) this.removeAttribute("checked");

                else this.setAttribute( "checked", true );

            }

            else if ( type == "text" )

                this.setAttribute( "value", $(this).val() );

            else if ( type == "select-multiple" || type == "select-one" )

                $(this).find( "option" ).each( function() {

                    if ( $(this).is(":not(:selected)") ) this.removeAttribute("selected");

                    else this.setAttribute( "selected", true );

                });

            else if ( type == "textarea" )

            {

                var v = $(this).attr( "value" );

                if ($.browser.mozilla)

                {

                    if (this.firstChild) this.firstChild.textContent = v;

                    else this.textContent = v;

                }

                else this.innerHTML = v;

            }

        });

        return ele;

    }



    function Iframe()

    {

        var frameId = settings.id;

        var iframeStyle = 'border:0;position:absolute;width:0px;height:0px;left:0px;top:0px;';

        var iframe;



        try

        {

            iframe = document.createElement('iframe');

            document.body.appendChild(iframe);

            $(iframe).attr({ style: iframeStyle, id: frameId, src: "" });

            iframe.doc = null;

            iframe.doc = iframe.contentDocument ? iframe.contentDocument : ( iframe.contentWindow ? iframe.contentWindow.document : iframe.document);

        }

        catch( e ) { throw e + ". iframes may not be supported in this browser."; }



        if ( iframe.doc == null ) throw "Cannot find document.";



        return iframe;

    }



    function Popup()

    {

        var windowAttr = "location=yes,statusbar=no,directories=no,menubar=no,titlebar=no,toolbar=no,dependent=no";

        windowAttr += ",width=" + settings.popWd + ",height=" + settings.popHt;

        windowAttr += ",resizable=yes,screenX=" + settings.popX + ",screenY=" + settings.popY + ",personalbar=no,scrollbars=no";



        var newWin = window.open( "", "_blank",  windowAttr );



        newWin.doc = newWin.document;



        return newWin;

    }

})(jQuery);
