/**
*  File:        maticsoft.printarea.js
*  Author:      tuzh@maticsoft.com
*  Copyright © 2004-2014 Maticsoft. All Rights Reserved.
*  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
*/
$.ajaxSetup({async: false});
(function($) {
    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: true,
        extraCss: '',
        extraHead: '',
        retainAttr: ["id", "class", "style"],
        print: function(paWindow,callback) {
            paWindow.print();
             if (callback) {
                  paWindow.close();
                        callback();
                    }
        },
        printBase: function(PAWindow,callback) {
            var paWindow = PAWindow.win;
            $(PAWindow.doc).ready(function() {
                paWindow.focus();
                settings.print(paWindow,callback);
               
                if (settings.mode == modes.popup && settings.popClose)
                    setTimeout(function() { paWindow.close(); }, 2000);
            });
        }
    };

    var settings = {}; //global settings
    var PrintArea = {
        print: function(PAWindow, callback) {
            settings.printBase(PAWindow, callback);
        },
        write: function(PADocument, $ele) {
            PADocument.open();
            PADocument.write(PrintArea.docType() + "<html>" + PrintArea.getHead() + PrintArea.getBody($ele) + "</html>");
            alert(PrintArea.getHead());
            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 };
            }
        },
        getPrintIframe: function(url,callback) {
            PrintArea.Iframe(url,callback);
        },
        Iframe: function (url,callback) {
            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);
                if (url && callback) {
                    $(iframe).attr({ style: iframeStyle, id: frameId, src: url });
                    $(iframe).load(function () {
                        this.doc = null;
                        this.doc = iframe.contentDocument ? iframe.contentDocument : (iframe.contentWindow ? iframe.contentWindow.document : iframe.document);
                        callback({ win: this.contentWindow || this, doc: this.doc });
                    });
                } else {
                    $(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;
        }
    };

    $.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);
    };
    $.fn.printIframe = function(url,callback,options) {
        $.extend(settings, defaults, options);

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

        settings.id = idPrefix + counter;

        PrintArea.getPrintIframe(url, function(printAreaWindow) {
            PrintArea.print(printAreaWindow,callback);
        });
    };
})(jQuery);