添加打印功能

app/assets/javascripts/jquery.jqprint-0.3.js

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+// -----------------------------------------------------------------------
+// Eros Fratini - [email protected]
+// jqprint 0.3
+//
+// - 19/06/2009 - some new implementations, added Opera support
+// - 11/05/2009 - first sketch
+//
+// Printing plug-in for jQuery, evolution of jPrintArea: http://plugins.jquery.com/project/jPrintArea
+// requires jQuery 1.3.x
+//
+// Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php
+//------------------------------------------------------------------------
+
+(function($) {
+    var opt;
+
+    $.fn.jqprint = function (options) {
+        opt = $.extend({}, $.fn.jqprint.defaults, options);
+
+        var $element = (this instanceof jQuery) ? this : $(this);
+
+        if (opt.operaSupport && $.browser.opera) 
+        { 
+            var tab = window.open("","jqPrint-preview");
+            tab.document.open();
+
+            var doc = tab.document;
+        }
+        else 
+        {
+            var $iframe = $("<iframe  />");
+
+            if (!opt.debug) { $iframe.css({ position: "absolute", width: "0px", height: "0px", left: "-600px", top: "-600px" }); }
+
+            $iframe.appendTo("body");
+            var doc = $iframe[0].contentWindow.document;
+        }
+
+        if (opt.importCSS)
+        {
+            if ($("link[media=print]").length > 0) 
+            {
+                $("link[media=print]").each( function() {
+                    doc.write("<link type='text/css' rel='stylesheet' href='" + $(this).attr("href") + "' media='print' />");
+                });
+            }
+            else 
+            {
+                $("link").each( function() {
+                    doc.write("<link type='text/css' rel='stylesheet' href='" + $(this).attr("href") + "' />");
+                });
+            }
+        }
+
+        if (opt.printContainer) { doc.write($element.outer()); }
+        else { $element.each( function() { doc.write($(this).html()); }); }
+
+        doc.close();
+
+        (opt.operaSupport && $.browser.opera ? tab : $iframe[0].contentWindow).focus();
+        setTimeout( function() { (opt.operaSupport && $.browser.opera ? tab : $iframe[0].contentWindow).print(); if (tab) { tab.close(); } }, 1000);
+    }
+
+    $.fn.jqprint.defaults = {
+		debug: false,
+		importCSS: true, 
+		printContainer: true,
+		operaSupport: true
+	};
+
+    // Thanks to 9__, found at http://users.livejournal.com/9__/380664.html
+    jQuery.fn.outer = function() {
+      return $($('<div></div>').html(this.clone())).html();
+    } 
+})(jQuery);