/*
 * printThis v1.4
 * @desc Printing plug-in for jQuery
 * @author Jason Day
 *
 * Resources (based on) :
 *              jPrintArea: http://plugins.jquery.com/project/jPrintArea
 *              jqPrint: https://github.com/permanenttourist/jquery.jqprint
 *              Ben Nadal: http://www.bennadel.com/blog/1591-Ask-Ben-Print-Part-Of-A-Web-Page-With-jQuery.htm
 *
 * Licensed under the MIT licence:
 *              http://www.opensource.org/licenses/mit-license.php
 *
 * (c) Jason Day 2014
 *
 * Usage:
 *
 *  $("#mySelector").printThis({
 *      debug: false,               * show the iframe for debugging
 *      importCSS: true,            * import page CSS
 *      importStyle: true,          * import style tags
 *      printContainer: true,       * grab outer container as well as the contents of the selector
 *      loadCSS: "path/to/my.css",  * path to additional css file
 *      pageTitle: "",              * add title to print page
 *      removeInline: false,        * remove all inline styles from print elements
 *      printDelay: 333,            * variable print delay
 *      header: null,               * prefix to html
 *      formValues: true            * preserve input/form values
 *  });
 *
 * Notes:
 *  - the loadCSS will load additional css (with or without @media print) into the iframe, adjusting layout
 */
;
(function($) {
    var opt;
    $.fn.printThis = function(options) {
        opt = $.extend({}, $.fn.printThis.defaults, options);
        var $element = this instanceof jQuery ? this : $(this);

        var strFrameName = "printThis-" + (new Date()).getTime();

        if (window.location.hostname !== document.domain && navigator.userAgent.match(/msie/i)) {
            // Ugly IE hacks due to IE not inheriting document.domain from parent
            // checks if document.domain is set by comparing the host name against document.domain
            var iframeSrc = "javascript:document.write(\"<head><script>document.domain=\\\"" + document.domain + "\\\";</script></head><body></body>\")";
            var printI = document.createElement('iframe');
            printI.name = "printIframe";
            printI.id = strFrameName;
            printI.className = "MSIE";
            document.body.appendChild(printI);
            printI.src = iframeSrc;

        } else {
            // other browsers inherit document.domain, and IE works if document.domain is not explicitly set
            var $frame = $("<iframe id='" + strFrameName + "' name='printIframe' />");
            $frame.appendTo("body");
        }


        var $iframe = $("#" + strFrameName);

        // show frame if in debug mode
        if (!opt.debug) $iframe.css({
            position: "absolute",
            width: "0px",
            height: "0px",
            left: "-600px",
            top: "-600px"
        });


        // $iframe.ready() and $iframe.load were inconsistent between browsers    
        setTimeout(function() {

            var $doc = $iframe.contents();

            // import page stylesheets
            if (opt.importCSS) $("link[rel=stylesheet]").each(function() {
                var href = $(this).attr("href");
                if (href) {
                    var media = $(this).attr("media") || "all";
                    $doc.find("head").append("<link type='text/css' rel='stylesheet' href='" + href + "' media='" + media + "'>")
                }
            });
            
            // import style tags
            if (opt.importStyle) $("style").each(function() {
                $doc.find("head").append($(this));
            });

            //add title of the page
            if (opt.pageTitle) $doc.find("head").append("<title>" + opt.pageTitle + "</title>");

            // import additional stylesheet
            if (opt.loadCSS) $doc.find("head").append("<link type='text/css' rel='stylesheet' href='" + opt.loadCSS + "'>");

            // print header
            if (opt.header) $doc.find("body").append(opt.header);

            // grab $.selector as container
            if (opt.printContainer) $doc.find("body").append($element.outer());

            // otherwise just print interior elements of container
            else $element.each(function() {
                $doc.find("body").append($(this).html());
            });

            // capture form/field values
            if (opt.formValues) {
                // loop through inputs
                var $input = $element.find('input');
                if ($input.length) {
                    $input.each(function() {
                        var $this = $(this),
                            $name = $(this).attr('name'),
                            $checker = $this.is(':checkbox') || $this.is(':radio'),
                            $iframeInput = $doc.find('input[name="' + $name + '"]'),
                            $value = $this.val();

                        //order matters here
                        if (!$checker) {
                            $iframeInput.val($value);
                        } else if ($this.is(':checked')) {
                            if ($this.is(':checkbox')) {
                                $iframeInput.attr('checked', 'checked');
                            } else if ($this.is(':radio')) {
                                $doc.find('input[name="' + $name + '"][value=' + $value + ']').attr('checked', 'checked');
                            }
                        }

                    });
                }

                //loop through selects
                var $select = $element.find('select');
                if ($select.length) {
                    $select.each(function() {
                        var $this = $(this),
                            $name = $(this).attr('name'),
                            $value = $this.val();
                        $doc.find('select[name="' + $name + '"]').val($value);
                    });
                }

                //loop through textareas
                var $textarea = $element.find('textarea');
                if ($textarea.length) {
                    $textarea.each(function() {
                        var $this = $(this),
                            $name = $(this).attr('name'),
                            $value = $this.val();
                        $doc.find('textarea[name="' + $name + '"]').val($value);
                    });
                }
            } // end capture form/field values

            // remove inline styles
            if (opt.removeInline) {
                // $.removeAttr available jQuery 1.7+
                if ($.isFunction($.removeAttr)) {
                    $doc.find("body *").removeAttr("style");
                } else {
                    $doc.find("body *").attr("style", "");
                }
            }

            setTimeout(function() {
                if ($iframe.hasClass("MSIE")) {
                    // check if the iframe was created with the ugly hack
                    // and perform another ugly hack out of neccessity
                    window.frames["printIframe"].focus();
                    $doc.find("head").append("<script>  window.print(); </script>");
                } else {
                    // proper method
                    $iframe[0].contentWindow.focus();
                    $iframe[0].contentWindow.print();
                }

                $element.trigger("done");
                //remove iframe after print
                if (!opt.debug) {
                    setTimeout(function() {
                        $iframe.remove();
                    }, 1000);
                }

            }, opt.printDelay);

        }, 333);

    };

    // defaults
    $.fn.printThis.defaults = {
        debug: false, // show the iframe for debugging
        importCSS: true, // import parent page css
        importStyle: true, // import style tags
        printContainer: true, // print outer container/$.selector
        loadCSS: "", // load an additional css file
        pageTitle: "", // add title to print page
        removeInline: false, // remove all inline styles
        printDelay: 333, // variable print delay
        header: null, // prefix to html
        formValues: true // preserve input/form values
    };

    // $.selector container
    jQuery.fn.outer = function() {
        return $($("<div></div>").html(this.clone())).html()
    }
})(jQuery);
