js灵活打印web页面区域内容的通用方法
来源：互联网 发布：正达排课软件破解版 编辑：程序博客网 时间：2024/04/30 13:15
我们做网站，经常需要打印页面指定区域的内容，而网上关于这块的说法很多，各种各样的打印控件也不少。但许多打印方案都不怎么好，至少我不喜欢，要么封装复杂，要么难以维护。正好现在的项目也需要用到页面打印，于是在网上找了一个最简洁的打印插件，在它的基础上自己写了一个通用的打印方法，可以直观的修改样式。现在把代码贴出来，留置后用，也可以给大家一些参考。
通过这次试水，才知道，原来html中，media元素大有用途，这里正好小用一把，去掉超链接的url显示
1.网上找的js打印插件
/* * Version 2.4.0 Copyright (C) 2013 * 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(){ * $("div.PrintArea").printArea( [OPTIONS] ); * }); * </script> * options are passed as json (example: {mode: "popup", popClose: false}) * * {OPTIONS} | [type] | (default), values | Explanation * --------- | --------- | ---------------------- | ----------- * @mode | [string] | (iframe),popup | printable window is either iframe or browser popup * @popHt | [number] | (500) | popup window height * @popWd | [number] | (400) | popup window width * @popX | [number] | (500) | popup window screen X position * @popY | [number] | (500) | popup window screen Y position * @popTitle | [string] | ('') | popup window title element * @popClose | [boolean] | (false),true | popup window close after printing * @extraCss | [string] | ('') | comma separated list of extra css to include * @retainAttr | [string[]] | ["id","class","style"] | string array of attributes to retain for the containment area. (ie: id, style, class) * @standard | [string] | strict, loose, (html5) | Only for popup. For html 4.01, strict or loose document standard, or html 5 standard * @extraHead | [string] | ('') | comma separated list of extra elements to be appended to the head tag */(function($) { 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 : false, extraCss : '', extraHead : '', retainAttr: ["id", "class", "style"] }; var settings = {};//global settings $.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 ); }; var PrintArea = { print : function( PAWindow ) { var paWindow = PAWindow.win; $(PAWindow.doc).ready(function(){ paWindow.focus(); paWindow.print(); if ( settings.mode == modes.popup && settings.popClose ) setTimeout(function() { paWindow.close(); }, 2000); }); }, write : function ( PADocument, $ele ) { PADocument.open(); PADocument.write( PrintArea.docType() + "<html>" + PrintArea.getHead() + PrintArea.getBody( $ele ) + "</html>" ); 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 = ""; var styles = ''; 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" media="print" href="' + $(this).attr("href") + '" />'; styles += '@import url("' + $(this).attr("href") + '") print;'; }); 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 + '<style type="text/css"> @media print{a:link:after {content: ""}}</style></head>'; //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 }; } }, Iframe : function () { 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); $(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; } };})(jQuery);2. 我的调用方法
function printArticle(areaId) { var styles = ".PrintStyleBtn{border:none;width:100%;;height:40px;line-height:40px;background-color:#eee;} .PrintStyleBtn input{ border-radius:5px;background-color:#999;color:#fff;float:right;margin:8px;height:24px;line-height:16px;padding:0px 5px;}.selected{background-color:#ccc;} .PrintStyleBtn span{margin:3px 0px;display:inline-block;border-radius:3px;height:24px;line-height:20px;padding:2px 5px;}.PrintStyleBtn span:hover{background-color:#999;} .print_content{border:1px solid #ddd;width:800px;height:auto;padding:20px;margin:50px auto;}"; insertStyleSheet(styles, "PrintStyle"); var printFrameHtml = '<div id="PrintFrame" style="border:none;width:100%;height:100%;position:absolute;top:0;left:0;background-color:#fff;">' + '<div class="PrintStyleBtn" style="">' + ' Font size:' + ' <span name="size">Small</span> |' + ' <span name="size" class="selected">Medium</span> |' + ' <span name="size">Large</span> ' + ' Line spacing:' + ' <span name="space">Compact</span> |' + ' <span name="space" class="selected">Normal</span> ' + ' Image:' + ' <span name="image" class="selected">Yes</span> |' + ' <span name="image">No</span> ' + ' <input id="btnCancel" type="button" value="Cancel"/>' + ' <input id="btnPrint" type="button" value="Print" />' + '</div>' + '<div class="print_content">' + $('#' + areaId).html() + '</div></div>'; $("body").append(printFrameHtml); $('.print_content').find(".viva-content-edit").remove(); $('.PrintStyleBtn').find('span').on('click', function () { var obj = $(this), name = obj.attr('name'), value = obj.html(); $('.PrintStyleBtn').find('span[name="' + name + '"]').removeClass('selected'); obj.addClass('selected'); if (name == 'size') $('.print_content').css('font-size', value == 'Small' ? 'small' : value == 'Medium' ? 'medium' : 'large' ); if (name == 'space') $('.print_content').css('line-height', value == 'Compact' ? '1' : 'normal'); if (name == 'image') { if (value == "Yes") { $('.print_content').find("img").show(); } else { $('.print_content').find("img").hide(); } } }); $('.PrintStyleBtn').find('input').on('click', function () { if (this.value == 'Print') { $('.print_content').printArea(); } $('#PrintFrame').remove(); });}3.附带页面sample
<input type="button" onclick="printArticle('articleRight');" value='Print' /><div id="articleRight"> <div class="article-title">Test Article Tilte</div> <div class="article-content">Test Article Content</div></div> 0 0
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