/*
* Print Element Plugin 1.0
*
* Copyright (c) 2009 Erik Zaadi
*
* Inspired by PrintArea (http://plugins.jquery.com/project/PrintArea) and
* http://stackoverflow.com/questions/472951/how-do-i-print-an-iframe-from-javascript-in-safari-chrome
*
*  jQuery plugin page : http://plugins.jquery.com/project/printElement 
*  Wiki : http://wiki.github.com/erikzaadi/jQueryPlugins/jqueryprintelement 
*  Home Page : http://erikzaadi.github.com/jQueryPlugins/jQuery.printElement 
*  
*  Thanks to David B (http://github.com/ungenio) and icgJohn (http://www.blogger.com/profile/11881116857076484100)
*  For their great contributions!
* 
* Dual licensed under the MIT and GPL licenses:
*   http://www.opensource.org/licenses/mit-license.php
*   http://www.gnu.org/licenses/gpl.html
*   
*   Note, Iframe Printing is not supported in Opera and Chrome 3.0, a popup window will be shown instead
*/
;
(function($){
$.fn.printElement = function(options){
    var mainOptions = $.extend({}, $.fn.printElement.defaults, options);
    //iframe mode is not supported for opera and chrome 3.0 (it prints the entire page).
    //http://www.google.com/support/forum/p/Webmasters/thread?tid=2cb0f08dce8821c3&hl=en
    if (mainOptions.printMode == 'iframe') {
        if ($.browser.opera || (/chrome/.test(navigator.userAgent.toLowerCase()))) 
            mainOptions.printMode = 'popup';
    }
    //Remove previously printed iframe if exists
    $("[id^='printElement_']").remove();
    
    return this.each(function(){
        //Support Metadata Plug-in if available
        var opts = $.meta ? $.extend({}, mainOptions, $this.data()) : mainOptions;
        _printElement($(this), opts);
    });
};
$.fn.printElement.defaults = {
    printMode: 'iframe', //Usage : iframe / popup
    pageTitle: '', //Print Page Title
    overrideElementCSS: null,
    /* Can be one of the following 3 options:
     * 1 : boolean (pass true for stripping all css linked)
     * 2 : array of $.fn.printElement.cssElement (s)
     * 3 : array of strings with paths to alternate css files (optimized for print)
     */
    printBodyOptions: {
        styleToAdd: 'padding:10px;margin:10px;', //style attributes to add to the body of print document
        classNameToAdd: '' //css class to add to the body of print document
    },
    leaveOpen: false, // in case of popup, leave the print page open or not
    iframeElementOptions: {
        styleToAdd: 'border:none;position:absolute;width:0px;height:0px;bottom:0px;left:0px;', //style attributes to add to the iframe element
        classNameToAdd: '' //css class to add to the iframe element
    },
    sourcePath: ''
};
$.fn.printElement.cssElement = {
    href: '',
    media: ''
};
function _printElement(element, opts){
    //Create markup to be printed
    var html = _getMarkup(element, opts);
    
    var popupOrIframe = null;
    var documentToWriteTo = null;
    if (opts.printMode.toLowerCase() == 'popup') {
    	  var src = opts.sourcePath ? opts.sourcePath : 'about:blank'
        popupOrIframe = window.open(src, 'printElementWindow', 'width=650,height=440,scrollbars=yes');
        documentToWriteTo = popupOrIframe.document;
    }
    else {
        //The random ID is to overcome a safari bug http://www.cjboco.com.sharedcopy.com/post.cfm/442dc92cd1c0ca10a5c35210b8166882.html
        var printElementID = "printElement_" + (Math.round(Math.random() * 99999)).toString();
        //Native creation of the element is faster..
        var iframe = document.createElement('IFRAME');
        $(iframe).attr({
            style: opts.iframeElementOptions.styleToAdd,
            id: printElementID,
            className: opts.iframeElementOptions.classNameToAdd,
            frameBorder: 0,
            scrolling: 'no',
            src: opts.sourcePath ? opts.sourcePath : 'about:blank'
        });
        document.body.appendChild(iframe);
        documentToWriteTo = (iframe.contentWindow || iframe.contentDocument);
        if (documentToWriteTo.document) 
            documentToWriteTo = documentToWriteTo.document;
        iframe = document.frames ? document.frames[printElementID] : document.getElementById(printElementID);
        popupOrIframe = iframe.contentWindow || iframe;
    }
    focus();
    if (!opts.sourcePath) {
	    documentToWriteTo.open();
	    documentToWriteTo.write(html);
	    documentToWriteTo.close();
    }
    _callPrint(popupOrIframe);
};

function _callPrint(element){
    if (element && element.printPage) 
        element.printPage();
    else 
        setTimeout(function(){
            _callPrint(element);
        }, 50);
}

function _getElementHTMLIncludingFormElements(element){
    var $element = $(element);
    //Radiobuttons and checkboxes
    $(":checked", $element).each(function(){
        this.setAttribute('checked', 'checked');
    });
    //simple text inputs
    $("input[type='text']", $element).each(function(){
        this.setAttribute('value', $(this).val());
    });
    $("select", $element).each(function(){
        var $select = $(this);
        $("option", $select).each(function(){
            if ($select.val() == $(this).val()) 
                this.setAttribute('selected', 'selected');
        });
    });
    $("textarea", $element).each(function(){
        //Thanks http://blog.ekini.net/2009/02/24/jquery-getting-the-latest-textvalue-inside-a-textarea/
        var value = $(this).attr('value');
        if ($.browser.mozilla) 
            this.firstChild.textContent = value;
        else 
            this.innerHTML = value;
    });
    var elementHtml = $element.html();
    return elementHtml;
}

function _getBaseHref(){
    return window.location.protocol + window.location.hostname + window.location.pathname;
}

function _getMarkup(element, opts){
    var $element = $(element);
    var elementHtml = _getElementHTMLIncludingFormElements(element);
    
    var html = new Array();
    html.push('<html><head><title>' + opts.pageTitle + '</title>');
    if (opts.overrideElementCSS) {
        if (opts.overrideElementCSS.length > 0) {
            for (var x = 0; x < opts.overrideElementCSS.length; x++) {
                var current = opts.overrideElementCSS[x];
                if (typeof(current) == 'string') 
                    html.push('<link type="text/css" rel="stylesheet" href="' + current + '" >');
                else 
                    html.push('<link type="text/css" rel="stylesheet" href="' + current.href + '" media="' + current.media + '" >');
            }
        }
    }
    else {
        $(document).find("link").filter(function(){
            return $(this).attr("rel").toLowerCase() == "stylesheet";
        }).each(function(){
            html.push('<link type="text/css" rel="stylesheet" href="' + $(this).attr("href") + '" media="' + $(this).attr('media') + '" >');
        });
    }
    //Ensure that relative links work
    html.push('<base href="' + _getBaseHref() + '" />');
    html.push('</head><body style="' + opts.printBodyOptions.styleToAdd + '" class="' + opts.printBodyOptions.classNameToAdd + '">');
    html.push('<div class="' + $element.attr('class') + '">' + elementHtml + '</div>');
    html.push('<script type="text/javascript">function printPage(){focus();print();' + ((!$.browser.opera && !opts.leaveOpen && opts.printMode.toLowerCase() == 'popup') ? 'close();' : '') + '}</script>');
    html.push('</body></html>');
    
    return html.join('');
};
})(jQuery);