jQuery.print/jQuery.print.js

/*  jQuery.print, version 1.0.2
 *  (c) Sathvik Ponangi, Doers' Guild
 * Licence: CC-By (http://creativecommons.org/licenses/by/3.0/)
 *--------------------------------------------------------------------------*/

(function($) {"use strict";
    // A nice closure for our definitions

    $.print = $.fn.print = function() {
        // Print a given set of elements

        var isNode = function(o) {
            /* http://stackoverflow.com/a/384380/937891 */
            return ( typeof Node === "object" ? o instanceof Node : o && typeof o === "object" && typeof o.nodeType === "number" && typeof o.nodeName === "string");
        }
        var options, $this;

        if (isNode(this)) {
            // If `this` is a HTML element, i.e. for
            // $(selector).print()
            $this = $(this);
        } else {
            if (arguments.length > 0) {
                // $.print(selector,options)
                $this = $(arguments[0]);
                if (isNode($this[0])) {
                    if (arguments.length > 1) {
                        options = arguments[1];
                    }
                } else {
                    // $.print(options)
                    options = arguments[0];
                    $this = $(this);
                }
            } else {
                // $.print()
                $this = $(this);
            }
        }

        var defaults = {
            globalStyles : true,
            mediaPrint : false,
            stylesheet : null,
            rejectWindow : true,
            noPrintSelector : ".no-print",
            iframe : true,
            append : null,
            prepend : null
        };
        // Default options
        options = $.extend(defaults, options);
        // Merge with user-options

        if (options.rejectWindow && $this[0] === window) {
            // Use document instead of window as it holds all HTML
            $this = $(document);
        }

        var styles = $("");
        if (options.globalStyles) {
            // Apply the stlyes from the current sheet to the printed page
            styles = $("style, link, meta, title");
        } else if (options.mediaPrint) {
            // Apply the media-print stylesheet
            styles = $("link[media=print]");
        }
        if (options.stylesheet) {
            // Add a custom stylesheet if given
            styles = $.merge(styles, $('<link rel="stylesheet" href="' + options.stylesheet + '">'));
        }

        var copy = $this.clone();
        // Create a copy of the element to print
        copy = $("<span/>").append(copy);
        copy.find(options.noPrintSelector).remove();
        // Remove unwanted elements
        copy.append(styles.clone());
        copy.append($(options.append).clone());
        copy.prepend($(options.prepend).clone());
        var content = copy.html();
        copy.remove();

        var w, wdoc;
        if (options.iframe) {
            // Use an iframe for printing
            try {
                $iframe = $(options.iframe + "");
                var iframeCount = $iframe.length;
                if (iframeCount === 0) {
                    // Create a new iFrame if none is given
                    $iframe = $('<iframe/>').appendTo('body').hide();
                }
                w = $iframe[0];
                w = w.contentWindow || w.contentDocument;
                wdoc = w.document || w;
                wdoc.open();
                wdoc.write(content);
                wdoc.close();
                w.focus();
                w.print();
                if (iframeCount === 0) {
                    // Destroy the iframe if created here
                    $iframe.remove();
                }
            } catch (e) {
                // Use the pop-up method if iframe fails for some reason
                w = window.open();
                w.document.write(content);
                w.document.close();
                w.focus();
                w.print();
                w.close();
            }
        } else {
            // Use a new window for printing
            w = window.open();
            w.document.write(content);
            w.document.close();
            w.focus();
            w.print();
            w.close();
        }
        return this;
    };

})(jQuery);