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Filename : jquery.PrintArea.js
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/**
 *  Version 2.4.0 Copyright (C) 2013
 *  Tested in IE 11, FF 28.0 and Chrome 33.0.1750.154
 *  No official support for other browsers, but will TRY to accommodate challenges in other browsers.
 *  Example:
 *      Print Button: <div id="print_button">Print</div>
 *      Print Area  : <div class="PrintArea" id="MyId" class="MyClass"> ... html ... </div>
 *      Javascript  : <script>
 *                       $("div#print_button").click(function(){
 *                           $("div.PrintArea").printArea( [OPTIONS] );
 *                       });
 *                     </script>
 *  options are passed as json (example: {mode: "popup", popClose: false})
 *
 *  {OPTIONS}   | [type]     | (default), values      | Explanation
 *  ---------   | ---------  | ---------------------- | -----------
 *  @mode       | [string]   | (iframe),popup         | printable window is either iframe or browser popup
 *  @popHt      | [number]   | (500)                  | popup window height
 *  @popWd      | [number]   | (400)                  | popup window width
 *  @popX       | [number]   | (500)                  | popup window screen X position
 *  @popY       | [number]   | (500)                  | popup window screen Y position
 *  @popTitle   | [string]   | ('')                   | popup window title element
 *  @popClose   | [boolean]  | (false),true           | popup window close after printing
 *  @extraCss   | [string]   | ('')                   | comma separated list of extra css to include
 *  @retainAttr | [string[]] | ["id","class","style"] | string array of attributes to retain for the containment area. (ie: id, style, class)
 *  @standard   | [string]   | strict, loose, (html5) | Only for popup. For html 4.01, strict or loose document standard, or html 5 standard
 *  @extraHead  | [string]   | ('')                   | comma separated list of extra elements to be appended to the head tag
 */
(function($) {
    var counter = 0;
    var modes = { iframe : "iframe", popup : "popup" };
    var standards = { strict : "strict", loose : "loose", html5 : "html5" };
    var defaults = { mode       : modes.iframe,
                     standard   : standards.html5,
                     popHt      : 500,
                     popWd      : 400,
                     popX       : 200,
                     popY       : 200,
                     popTitle   : '',
                     popClose   : false,
                     extraCss   : '',
                     extraHead  : '',
                     retainAttr : ["id","class","style"] };

    var settings = {};//global settings

    $.fn.printArea = function( options )
    {
        $.extend( settings, defaults, options );

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

        settings.id = idPrefix + counter;

        var $printSource = $(this);

        var PrintAreaWindow = PrintArea.getPrintWindow();

        PrintArea.write( PrintAreaWindow.doc, $printSource );

        setTimeout( function () { PrintArea.print( PrintAreaWindow ); }, 1000 );
    };

    var PrintArea = {
        print : function( PAWindow ) {
            var paWindow = PAWindow.win;

            $(PAWindow.doc).ready(function(){
                paWindow.focus();
                paWindow.print();

                if ( settings.mode == modes.popup && settings.popClose )
                    setTimeout(function() { paWindow.close(); }, 2000);
            });
        },
        write : function ( PADocument, $ele ) {
            PADocument.open();
            PADocument.write( PrintArea.docType() + "<html>" + PrintArea.getHead() + PrintArea.getBody( $ele ) + "</html>" );
            PADocument.close();
        },
        docType : function() {
            if ( settings.mode == modes.iframe ) return "";

            if ( settings.standard == standards.html5 ) return "<!DOCTYPE html>";

            var transitional = settings.standard == standards.loose ? " Transitional" : "";
            var dtd = settings.standard == standards.loose ? "loose" : "strict";

            return '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01' + transitional + '//EN" "http://www.w3.org/TR/html4/' + dtd +  '.dtd">';
        },
        getHead : function() {
            var extraHead = "";
            var links = "";

            if ( settings.extraHead ) settings.extraHead.replace( /([^,]+)/g, function(m){ extraHead += m });

            $(document).find("link")
                .filter(function(){ // Requirement: <link> element MUST have rel="stylesheet" to be considered in print document
                        var relAttr = $(this).attr("rel");
                        return ($.type(relAttr) === 'undefined') == false && relAttr.toLowerCase() == 'stylesheet';
                    })
                .filter(function(){ // Include if media is undefined, empty, print or all
                        var mediaAttr = $(this).attr("media");
                        return $.type(mediaAttr) === 'undefined' || mediaAttr == "" || mediaAttr.toLowerCase() == 'print' || mediaAttr.toLowerCase() == 'all'
                    })
                .each(function(){
                        links += '<link type="text/css" rel="stylesheet" href="' + $(this).attr("href") + '" >';
                    });
            if ( settings.extraCss ) settings.extraCss.replace( /([^,\s]+)/g, function(m){ links += '<link type="text/css" rel="stylesheet" href="' + m + '">' });

            return "<head><title>" + settings.popTitle + "</title>" + extraHead + links + "</head>";
        },
        getBody : function ( elements ) {
            var htm = "";
            var attrs = settings.retainAttr;
            elements.each(function() {
                var ele = PrintArea.getFormData( $(this) );

                var attributes = ""
                for ( var x = 0; x < attrs.length; x++ )
                {
                    var eleAttr = $(ele).attr( attrs[x] );
                    if ( eleAttr ) attributes += (attributes.length > 0 ? " ":"") + attrs[x] + "='" + eleAttr + "'";
                }

                htm += '<div ' + attributes + '>' + $(ele).html() + '</div>';
            });

            return "<body>" + htm + "</body>";
        },
        getFormData : function ( ele ) {
            var copy = ele.clone();
            var copiedInputs = $("input,select,textarea", copy);
            $("input,select,textarea", ele).each(function( i ){
                var typeInput = $(this).attr("type");
                if ($.type(typeInput) === 'undefined') typeInput = $(this).is("select") ? "select" : $(this).is("textarea") ? "textarea" : "";
                var copiedInput = copiedInputs.eq( i );

                if ( typeInput == "radio" || typeInput == "checkbox" ) copiedInput.attr( "checked", $(this).is(":checked") );
                else if ( typeInput == "text" ) copiedInput.attr( "value", $(this).val() );
                else if ( typeInput == "select" )
                    $(this).find( "option" ).each( function( i ) {
                        if ( $(this).is(":selected") ) $("option", copiedInput).eq( i ).attr( "selected", true );
                    });
                else if ( typeInput == "textarea" ) copiedInput.text( $(this).val() );
            });
            return copy;
        },
        getPrintWindow : function () {
            switch ( settings.mode )
            {
                case modes.iframe :
                    var f = new PrintArea.Iframe();
                    return { win : f.contentWindow || f, doc : f.doc };
                case modes.popup :
                    var p = new PrintArea.Popup();
                    return { win : p, doc : p.doc };
            }
        },
        Iframe : function () {
            var frameId = settings.id;
            var iframeStyle = 'border:0;position:absolute;width:0px;height:0px;right:0px;top:0px;';
            var iframe;

            try
            {
                iframe = document.createElement('iframe');
                document.body.appendChild(iframe);
                $(iframe).attr({ style: iframeStyle, id: frameId, src: "#" + new Date().getTime() });
                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;
        },
        Popup : function () {
            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=yes";

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

            newWin.doc = newWin.document;

            return newWin;
        }
    };
})(jQuery);