jQuery.print库，网页打印库
目前為
此腳本不應該直接安裝，它是一個供其他腳本使用的函式庫。欲使用本函式庫，請在腳本 metadata 寫上： // @require https://update.cn-greasyfork.org/scripts/38955/939949/jQueryprint.js
/* @license
* jQuery.print, version 1.6.2
* Licence: CC-By (http://creativecommons.org/licenses/by/3.0/)
*--------------------------------------------------------------------------*/
(function ($) {
"use strict";
// A nice closure for our definitions
function jQueryCloneWithSelectAndTextAreaValues(elmToClone, withDataAndEvents, deepWithDataAndEvents) {
// Replacement jQuery clone that also clones the values in selects and textareas as jQuery doesn't for performance reasons - https://stackoverflow.com/questions/742810/clone-isnt-cloning-select-values
// Based on https://github.com/spencertipping/jquery.fix.clone
var $elmToClone = $(elmToClone),
$result = $elmToClone.clone(withDataAndEvents, deepWithDataAndEvents),
$myTextareas = $elmToClone.find('textarea').add($elmToClone.filter('textarea')),
$resultTextareas = $result.find('textarea').add($result.filter('textarea')),
$mySelects = $elmToClone.find('select').add($elmToClone.filter('select')),
$resultSelects = $result.find('select').add($result.filter('select')),
$myCanvas = $elmToClone.find('canvas').add($elmToClone.filter('canvas')),
$resultCanvas = $result.find('canvas').add($result.filter('canvas')),
i, l, j, m, myCanvasContext;
for (i = 0, l = $myTextareas.length; i < l; ++i) {
$($resultTextareas[i]).val($($myTextareas[i]).val());
}
for (i = 0, l = $mySelects.length; i < l; ++i) {
for (j = 0, m = $mySelects[i].options.length; j < m; ++j) {
if ($mySelects[i].options[j].selected === true) {
$resultSelects[i].options[j].selected = true;
}
}
}
for (i = 0, l = $myCanvas.length; i < l; ++i) {
// https://stackoverflow.com/a/41242597
myCanvasContext = $myCanvas[i].getContext('2d');
if(myCanvasContext) {
$resultCanvas[i].getContext('2d').drawImage($myCanvas[i], 0,0);
$($resultCanvas[i]).attr("data-jquery-print", myCanvasContext.canvas.toDataURL());
}
}
return $result;
}
function getjQueryObject(string) {
// Make string a vaild jQuery thing
var jqObj = $("");
try {
jqObj = jQueryCloneWithSelectAndTextAreaValues(string);
} catch (e) {
jqObj = $("<span />")
.html(string);
}
return jqObj;
}
function printFrame(frameWindow, content, options) {
// Print the selected window/iframe
var def = $.Deferred();
try {
frameWindow = frameWindow.contentWindow || frameWindow.contentDocument || frameWindow;
try {
frameWindow.resizeTo(window.innerWidth, window.innerHeight);
} catch (err) {
console.warn(err);
}
var wdoc = frameWindow.document || frameWindow.contentDocument || frameWindow;
if(options.doctype) {
wdoc.write(options.doctype);
}
wdoc.write(content);
try {
var canvas = wdoc.querySelectorAll('canvas');
for(var i = 0; i < canvas.length; i++) {
var ctx = canvas[i].getContext("2d");
var image = new Image();
image.onload = function() {
ctx.drawImage(image, 0, 0);
};
image.src = canvas[i].getAttribute("data-jquery-print");
}
} catch (err) {
console.warn(err);
}
wdoc.close();
var printed = false,
callPrint = function () {
if(printed) {
return;
}
// Fix for IE : Allow it to render the iframe
frameWindow.focus();
try {
// Fix for IE11 - printng the whole page instead of the iframe content
if (!frameWindow.document.execCommand('print', false, null)) {
// document.execCommand returns false if it failed -http://stackoverflow.com/a/21336448/937891
frameWindow.print();
}
// focus body as it is losing focus in iPad and content not getting printed
$('body').focus();
} catch (e) {
frameWindow.print();
}
frameWindow.close();
printed = true;
def.resolve();
};
// Print once the frame window loads - seems to work for the new-window option but unreliable for the iframe
$(frameWindow).on("load", callPrint);
// Fallback to printing directly if the frame doesn't fire the load event for whatever reason
setTimeout(callPrint, options.timeout);
} catch (err) {
def.reject(err);
}
return def;
}
function printContentInIFrame(content, options) {
var $iframe = $(options.iframe + "");
var iframeCount = $iframe.length;
if (iframeCount === 0) {
// Create a new iFrame if none is given
$iframe = $('<iframe height="0" width="0" border="0" wmode="Opaque"/>')
.prependTo('body')
.css({
"position": "absolute",
"top": -999,
"left": -999
});
}
var frameWindow = $iframe.get(0);
return printFrame(frameWindow, content, options)
.done(function () {
// Success
setTimeout(function () {
// Wait for IE
if (iframeCount === 0) {
// Destroy the iframe if created here
$iframe.remove();
}
}, 1000);
})
.fail(function (err) {
// Use the pop-up method if iframe fails for some reason
console.error("Failed to print from iframe", err);
printContentInNewWindow(content, options);
})
.always(function () {
try {
options.deferred.resolve();
} catch (err) {
console.warn('Error notifying deferred', err);
}
});
}
function printContentInNewWindow(content, options) {
// Open a new window and print selected content
var frameWindow = window.open();
return printFrame(frameWindow, content, options)
.always(function () {
try {
options.deferred.resolve();
} catch (err) {
console.warn('Error notifying deferred', err);
}
});
}
function isNode(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");
}
$.print = $.fn.print = function () {
// Print a given set of elements
var options, $this, self = this;
// console.log("Printing", this, arguments);
if (self instanceof $) {
// Get the node if it is a jQuery object
self = self.get(0);
}
if (isNode(self)) {
// If `this` is a HTML element, i.e. for
// $(selector).print()
$this = $(self);
if (arguments.length > 0) {
options = arguments[0];
}
} 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 = $("html");
}
} else {
// $.print()
$this = $("html");
}
}
// Default options
var defaults = {
globalStyles: true,
mediaPrint: false,
stylesheet: null,
noPrintSelector: ".no-print",
iframe: true,
append: null,
prepend: null,
manuallyCopyFormValues: true,
deferred: $.Deferred(),
timeout: 750,
title: null,
doctype: '<!doctype html>'
};
// Merge with user-options
options = $.extend({}, defaults, (options || {}));
var $styles = $("");
if (options.globalStyles) {
// Apply the stlyes from the current sheet to the printed page
$styles = $("style, link, meta, base, title");
} else if (options.mediaPrint) {
// Apply the media-print stylesheet
$styles = $("link[media=print]");
}
if (options.stylesheet) {
// Add a custom stylesheet(s) if given
if (!(($.isArray ? $.isArray : Array.isArray)(options.stylesheet))) {
options.stylesheet = [options.stylesheet]
}
for(var i = 0; i < options.stylesheet.length; i++) {
$styles = $.merge($styles, $('<link rel="stylesheet" href="' + options.stylesheet[i] + '">'));
}
}
// Create a copy of the element to print
var copy = jQueryCloneWithSelectAndTextAreaValues($this, true, true);
// Wrap it in a span to get the HTML markup string
copy = $("<span/>")
.append(copy);
// Remove unwanted elements
copy.find(options.noPrintSelector)
.remove();
// Add in the styles
copy.append(jQueryCloneWithSelectAndTextAreaValues($styles));
// Update title
if (options.title) {
var title = $("title", copy);
if (title.length === 0) {
title = $("<title />");
copy.append(title);
}
title.text(options.title);
}
// Appedned content
copy.append(getjQueryObject(options.append));
// Prepended content
copy.prepend(getjQueryObject(options.prepend));
if (options.manuallyCopyFormValues) {
// Manually copy form values into the HTML for printing user-modified input fields
// http://stackoverflow.com/a/26707753
copy.find("input")
.each(function () {
var $field = $(this);
if ($field.is("[type='radio']") || $field.is("[type='checkbox']")) {
if ($field.prop("checked")) {
$field.attr("checked", "checked");
}
} else {
$field.attr("value", $field.val());
}
});
copy.find("select").each(function () {
var $field = $(this);
$field.find(":selected").attr("selected", "selected");
});
copy.find("textarea").each(function () {
// Fix for https://github.com/DoersGuild/jQuery.print/issues/18#issuecomment-96451589
var $field = $(this);
$field.text($field.val());
});
}
// Get the HTML markup string
var content = copy.html();
// Notify with generated markup & cloned elements - useful for logging, etc
try {
options.deferred.notify('generated_markup', content, copy);
} catch (err) {
console.warn('Error notifying deferred', err);
}
// Destroy the copy
copy.remove();
if (options.iframe) {
// Use an iframe for printing
try {
printContentInIFrame(content, options);
} catch (e) {
// Use the pop-up method if iframe fails for some reason
console.error("Failed to print from iframe", e.stack, e.message);
printContentInNewWindow(content, options);
}
} else {
// Use a new window for printing
printContentInNewWindow(content, options);
}
return this;
};
})(jQuery);