source: public/vendors/dataTable/Buttons-1.6.1/js/buttons.print.js@ d95fdd2

/*!
 * Print button for Buttons and DataTables.
 * 2016 SpryMedia Ltd - datatables.net/license
 */

(function( factory ){
        if ( typeof define === 'function' && define.amd ) {
                // AMD
                define( ['jquery', 'datatables.net', 'datatables.net-buttons'], function ( $ ) {
                        return factory( $, window, document );
                } );
        }
        else if ( typeof exports === 'object' ) {
                // CommonJS
                module.exports = function (root, $) {
                        if ( ! root ) {
                                root = window;
                        }

                        if ( ! $ || ! $.fn.dataTable ) {
                                $ = require('datatables.net')(root, $).$;
                        }

                        if ( ! $.fn.dataTable.Buttons ) {
                                require('datatables.net-buttons')(root, $);
                        }

                        return factory( $, root, root.document );
                };
        }
        else {
                // Browser
                factory( jQuery, window, document );
        }
}(function( $, window, document, undefined ) {
'use strict';
var DataTable = $.fn.dataTable;


var _link = document.createElement( 'a' );

/**
 * Clone link and style tags, taking into account the need to change the source
 * path.
 *
 * @param  {node}     el Element to convert
 */
var _styleToAbs = function( el ) {
        var url;
        var clone = $(el).clone()[0];
        var linkHost;

        if ( clone.nodeName.toLowerCase() === 'link' ) {
                clone.href = _relToAbs( clone.href );
        }

        return clone.outerHTML;
};

/**
 * Convert a URL from a relative to an absolute address so it will work
 * correctly in the popup window which has no base URL.
 *
 * @param  {string} href URL
 */
var _relToAbs = function( href ) {
        // Assign to a link on the original page so the browser will do all the
        // hard work of figuring out where the file actually is
        _link.href = href;
        var linkHost = _link.host;

        // IE doesn't have a trailing slash on the host
        // Chrome has it on the pathname
        if ( linkHost.indexOf('/') === -1 && _link.pathname.indexOf('/') !== 0) {
                linkHost += '/';
        }

        return _link.protocol+"//"+linkHost+_link.pathname+_link.search;
};


DataTable.ext.buttons.print = {
        className: 'buttons-print',

        text: function ( dt ) {
                return dt.i18n( 'buttons.print', 'Print' );
        },

        action: function ( e, dt, button, config ) {
                var data = dt.buttons.exportData(
                        $.extend( {decodeEntities: false}, config.exportOptions ) // XSS protection
                );
                var exportInfo = dt.buttons.exportInfo( config );
                var columnClasses = dt
                        .columns( config.exportOptions.columns )
                        .flatten()
                        .map( function (idx) {
                                return dt.settings()[0].aoColumns[dt.column(idx).index()].sClass;
                        } )
                        .toArray();

                var addRow = function ( d, tag ) {
                        var str = '<tr>';

                        for ( var i=0, ien=d.length ; i<ien ; i++ ) {
                                // null and undefined aren't useful in the print output
                                var dataOut = d[i] === null || d[i] === undefined ?
                                        '' :
                                        d[i];
                                var classAttr = columnClasses[i] ?
                                        'class="'+columnClasses[i]+'"' :
                                        '';

                                str += '<'+tag+' '+classAttr+'>'+dataOut+'</'+tag+'>';
                        }

                        return str + '</tr>';
                };

                // Construct a table for printing
                var html = '<table class="'+dt.table().node().className+'">';

                if ( config.header ) {
                        html += '<thead>'+ addRow( data.header, 'th' ) +'</thead>';
                }

                html += '<tbody>';
                for ( var i=0, ien=data.body.length ; i<ien ; i++ ) {
                        html += addRow( data.body[i], 'td' );
                }
                html += '</tbody>';

                if ( config.footer && data.footer ) {
                        html += '<tfoot>'+ addRow( data.footer, 'th' ) +'</tfoot>';
                }
                html += '</table>';

                // Open a new window for the printable table
                var win = window.open( '', '' );
                win.document.close();

                // Inject the title and also a copy of the style and link tags from this
                // document so the table can retain its base styling. Note that we have
                // to use string manipulation as IE won't allow elements to be created
                // in the host document and then appended to the new window.
                var head = '<title>'+exportInfo.title+'</title>';
                $('style, link').each( function () {
                        head += _styleToAbs( this );
                } );

                try {
                        win.document.head.innerHTML = head; // Work around for Edge
                }
                catch (e) {
                        $(win.document.head).html( head ); // Old IE
                }

                // Inject the table and other surrounding information
                win.document.body.innerHTML =
                        '<h1>'+exportInfo.title+'</h1>'+
                        '<div>'+(exportInfo.messageTop || '')+'</div>'+
                        html+
                        '<div>'+(exportInfo.messageBottom || '')+'</div>';

                $(win.document.body).addClass('dt-print-view');

                $('img', win.document.body).each( function ( i, img ) {
                        img.setAttribute( 'src', _relToAbs( img.getAttribute('src') ) );
                } );

                if ( config.customize ) {
                        config.customize( win, config, dt );
                }

                // Allow stylesheets time to load
                var autoPrint = function () {
                        if ( config.autoPrint ) {
                                win.print(); // blocking - so close will not
                                win.close(); // execute until this is done
                        }
                };

                if ( navigator.userAgent.match(/Trident\/\d.\d/) ) { // IE needs to call this without a setTimeout
                        autoPrint();
                }
                else {
                        win.setTimeout( autoPrint, 1000 );
                }
        },

        title: '*',

        messageTop: '*',

        messageBottom: '*',

        exportOptions: {},

        header: true,

        footer: false,

        autoPrint: true,

        customize: null
};


return DataTable.Buttons;
}));