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336 lines
14 KiB
JavaScript
Executable File
336 lines
14 KiB
JavaScript
Executable File
/*
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* printThis v1.15.0
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* @desc Printing plug-in for jQuery
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* @author Jason Day
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*
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* Resources (based on):
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* - jPrintArea: http://plugins.jquery.com/project/jPrintArea
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* - jqPrint: https://github.com/permanenttourist/jquery.jqprint
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* - Ben Nadal: http://www.bennadel.com/blog/1591-Ask-Ben-Print-Part-Of-A-Web-Page-With-jQuery.htm
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*
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* Licensed under the MIT licence:
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* http://www.opensource.org/licenses/mit-license.php
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*
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* (c) Jason Day 2015-2018
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*
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* Usage:
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*
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* $("#mySelector").printThis({
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* debug: false, // show the iframe for debugging
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* importCSS: true, // import parent page css
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* importStyle: false, // import style tags
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* printContainer: true, // grab outer container as well as the contents of the selector
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* loadCSS: "path/to/my.css", // path to additional css file - use an array [] for multiple
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* pageTitle: "", // add title to print page
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* removeInline: false, // remove all inline styles from print elements
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* removeInlineSelector: "body *", // custom selectors to filter inline styles. removeInline must be true
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* printDelay: 333, // variable print delay
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* header: null, // prefix to html
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* footer: null, // postfix to html
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* base: false, // preserve the BASE tag, or accept a string for the URL
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* formValues: true, // preserve input/form values
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* canvas: false, // copy canvas elements
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* doctypeString: '...', // enter a different doctype for older markup
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* removeScripts: false, // remove script tags from print content
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* copyTagClasses: false // copy classes from the html & body tag
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* beforePrintEvent: null, // callback function for printEvent in iframe
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* beforePrint: null, // function called before iframe is filled
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* afterPrint: null // function called before iframe is removed
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* });
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*
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* Notes:
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* - the loadCSS will load additional CSS (with or without @media print) into the iframe, adjusting layout
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*/
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;
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(function($) {
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function appendContent($el, content) {
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if (!content) return;
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// Simple test for a jQuery element
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$el.append(content.jquery ? content.clone() : content);
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}
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function appendBody($body, $element, opt) {
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// Clone for safety and convenience
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// Calls clone(withDataAndEvents = true) to copy form values.
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var $content = $element.clone(opt.formValues);
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if (opt.formValues) {
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// Copy original select and textarea values to their cloned counterpart
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// Makes up for inability to clone select and textarea values with clone(true)
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copyValues($element, $content, 'select, textarea');
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}
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if (opt.removeScripts) {
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$content.find('script').remove();
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}
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if (opt.printContainer) {
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// grab $.selector as container
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$content.appendTo($body);
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} else {
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// otherwise just print interior elements of container
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$content.each(function() {
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$(this).children().appendTo($body)
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});
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}
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}
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// Copies values from origin to clone for passed in elementSelector
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function copyValues(origin, clone, elementSelector) {
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var $originalElements = origin.find(elementSelector);
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clone.find(elementSelector).each(function(index, item) {
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$(item).val($originalElements.eq(index).val());
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});
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}
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var opt;
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$.fn.printThis = function(options) {
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opt = $.extend({}, $.fn.printThis.defaults, options);
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var $element = this instanceof jQuery ? this : $(this);
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var strFrameName = "printThis-" + (new Date()).getTime();
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if (window.location.hostname !== document.domain && navigator.userAgent.match(/msie/i)) {
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// Ugly IE hacks due to IE not inheriting document.domain from parent
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// checks if document.domain is set by comparing the host name against document.domain
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var iframeSrc = "javascript:document.write(\"<head><script>document.domain=\\\"" + document.domain + "\\\";</s" + "cript></head><body></body>\")";
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var printI = document.createElement('iframe');
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printI.name = "printIframe";
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printI.id = strFrameName;
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printI.className = "MSIE";
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document.body.appendChild(printI);
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printI.src = iframeSrc;
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} else {
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// other browsers inherit document.domain, and IE works if document.domain is not explicitly set
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var $frame = $("<iframe id='" + strFrameName + "' name='printIframe' />");
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$frame.appendTo("body");
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}
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var $iframe = $("#" + strFrameName);
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// show frame if in debug mode
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if (!opt.debug) $iframe.css({
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position: "absolute",
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width: "0px",
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height: "0px",
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left: "-600px",
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top: "-600px"
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});
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// before print callback
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if (typeof opt.beforePrint === "function") {
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opt.beforePrint();
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}
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// $iframe.ready() and $iframe.load were inconsistent between browsers
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setTimeout(function() {
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// Add doctype to fix the style difference between printing and render
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function setDocType($iframe, doctype){
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var win, doc;
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win = $iframe.get(0);
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win = win.contentWindow || win.contentDocument || win;
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doc = win.document || win.contentDocument || win;
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doc.open();
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doc.write(doctype);
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doc.close();
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}
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if (opt.doctypeString){
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setDocType($iframe, opt.doctypeString);
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}
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var $doc = $iframe.contents(),
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$head = $doc.find("head"),
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$body = $doc.find("body"),
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$base = $('base'),
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baseURL;
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// add base tag to ensure elements use the parent domain
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if (opt.base === true && $base.length > 0) {
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// take the base tag from the original page
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baseURL = $base.attr('href');
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} else if (typeof opt.base === 'string') {
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// An exact base string is provided
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baseURL = opt.base;
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} else {
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// Use the page URL as the base
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baseURL = document.location.protocol + '//' + document.location.host;
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}
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$head.append('<base href="' + baseURL + '">');
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// import page stylesheets
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if (opt.importCSS) $("link[rel=stylesheet]").each(function() {
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var href = $(this).attr("href");
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if (href) {
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var media = $(this).attr("media") || "all";
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$head.append("<link type='text/css' rel='stylesheet' href='" + href + "' media='" + media + "'>");
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}
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});
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// import style tags
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if (opt.importStyle) $("style").each(function() {
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$head.append(this.outerHTML);
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});
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// add title of the page
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if (opt.pageTitle) $head.append("<title>" + opt.pageTitle + "</title>");
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// import additional stylesheet(s)
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if (opt.loadCSS) {
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if ($.isArray(opt.loadCSS)) {
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jQuery.each(opt.loadCSS, function(index, value) {
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$head.append("<link type='text/css' rel='stylesheet' href='" + this + "'>");
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});
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} else {
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$head.append("<link type='text/css' rel='stylesheet' href='" + opt.loadCSS + "'>");
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}
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}
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var pageHtml = $('html')[0];
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// CSS VAR in html tag when dynamic apply e.g. document.documentElement.style.setProperty("--foo", bar);
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$doc.find('html').prop('style', pageHtml.style.cssText);
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// copy 'root' tag classes
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var tag = opt.copyTagClasses;
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if (tag) {
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tag = tag === true ? 'bh' : tag;
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if (tag.indexOf('b') !== -1) {
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$body.addClass($('body')[0].className);
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}
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if (tag.indexOf('h') !== -1) {
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$doc.find('html').addClass(pageHtml.className);
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}
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}
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// print header
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appendContent($body, opt.header);
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if (opt.canvas) {
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// add canvas data-ids for easy access after cloning.
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var canvasId = 0;
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// .addBack('canvas') adds the top-level element if it is a canvas.
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$element.find('canvas').addBack('canvas').each(function(){
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$(this).attr('data-printthis', canvasId++);
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});
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}
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appendBody($body, $element, opt);
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if (opt.canvas) {
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// Re-draw new canvases by referencing the originals
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$body.find('canvas').each(function(){
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var cid = $(this).data('printthis'),
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$src = $('[data-printthis="' + cid + '"]');
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this.getContext('2d').drawImage($src[0], 0, 0);
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// Remove the markup from the original
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if ($.isFunction($.fn.removeAttr)) {
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$src.removeAttr('data-printthis');
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} else {
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$.each($src, function(i, el) {
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el.removeAttribute('data-printthis')
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});
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}
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});
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}
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// remove inline styles
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if (opt.removeInline) {
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// Ensure there is a selector, even if it's been mistakenly removed
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var selector = opt.removeInlineSelector || '*';
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// $.removeAttr available jQuery 1.7+
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if ($.isFunction($.removeAttr)) {
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$body.find(selector).removeAttr("style");
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} else {
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$body.find(selector).attr("style", "");
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}
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}
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// print "footer"
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appendContent($body, opt.footer);
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// attach event handler function to beforePrint event
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function attachOnBeforePrintEvent($iframe, beforePrintHandler) {
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var win = $iframe.get(0);
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win = win.contentWindow || win.contentDocument || win;
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if (typeof beforePrintHandler === "function") {
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if ('matchMedia' in win) {
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win.matchMedia('print').addListener(function(mql) {
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if(mql.matches) beforePrintHandler();
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});
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} else {
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win.onbeforeprint = beforePrintHandler;
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}
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}
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}
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attachOnBeforePrintEvent($iframe, opt.beforePrint);
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setTimeout(function() {
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if ($iframe.hasClass("MSIE")) {
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// check if the iframe was created with the ugly hack
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// and perform another ugly hack out of neccessity
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window.frames["printIframe"].focus();
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$head.append("<script> window.print(); </s" + "cript>");
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} else {
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// proper method
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if (document.queryCommandSupported("print")) {
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$iframe[0].contentWindow.document.execCommand("print", false, null);
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} else {
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$iframe[0].contentWindow.focus();
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$iframe[0].contentWindow.print();
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}
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}
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// remove iframe after print
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if (!opt.debug) {
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setTimeout(function() {
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$iframe.remove();
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}, 1000);
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}
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// after print callback
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if (typeof opt.afterPrint === "function") {
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opt.afterPrint();
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}
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}, opt.printDelay);
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}, 333);
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};
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// defaults
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$.fn.printThis.defaults = {
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debug: false, // show the iframe for debugging
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importCSS: true, // import parent page css
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importStyle: false, // import style tags
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printContainer: true, // print outer container/$.selector
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loadCSS: "", // path to additional css file - use an array [] for multiple
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pageTitle: "", // add title to print page
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removeInline: false, // remove inline styles from print elements
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removeInlineSelector: "*", // custom selectors to filter inline styles. removeInline must be true
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printDelay: 333, // variable print delay
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header: null, // prefix to html
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footer: null, // postfix to html
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base: false, // preserve the BASE tag or accept a string for the URL
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formValues: true, // preserve input/form values
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canvas: false, // copy canvas content
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doctypeString: '<!DOCTYPE html>', // enter a different doctype for older markup
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removeScripts: false, // remove script tags from print content
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copyTagClasses: false, // copy classes from the html & body tag
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beforePrintEvent: null, // callback function for printEvent in iframe
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beforePrint: null, // function called before iframe is filled
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afterPrint: null // function called before iframe is removed
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};
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})(jQuery);
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