[1730][plugin, templates, scripts, css] add chosen plugin for vocab tags multiple select
[1730][plugin, templates, scripts, css] add chosen plugin for vocab tags multiple select

--- a/ckanext/example/plugin.py
+++ b/ckanext/example/plugin.py
@@ -1,6 +1,8 @@
 import os
 from logging import getLogger
 
+from pylons import request
+from genshi.input import HTML
 from genshi.filters.transform import Transformer
 
 from ckan.plugins import implements, SingletonPlugin
@@ -70,9 +72,26 @@
         This example filter renames 'frob' to 'foobar' (this string is
         found in the custom ``home/index.html`` template provided as
         part of the package).
+
+        It also adds the chosen JQuery plugin to the page if viewing the
+        dataset edit page (provides a better UX for working with tags with vocabularies)
         """
         stream = stream | Transformer('//p[@id="examplething"]/text()')\
                  .substitute(r'frob', r'foobar')
+
+        routes = request.environ.get('pylons.routes_dict')
+        if routes.get('controller') == 'package' \
+            and routes.get('action') == 'edit':
+                stream = stream | Transformer('head').append(HTML(
+                    '<link rel="stylesheet" href="/css/chosen.css" />'
+                ))
+                stream = stream | Transformer('body').append(HTML(
+                    '''
+                    <script src="/scripts/chosen.jquery.min.js" type="text/javascript"></script>'
+                    <script type="text/javascript">$(".chzn-select").chosen();</script>
+                    '''
+                ))
+
         return stream
 
     def before_map(self, map):

 Binary files /dev/null and b/ckanext/example/theme/public/css/chosen-sprite.png differ
--- /dev/null
+++ b/ckanext/example/theme/public/css/chosen.css
@@ -1,1 +1,390 @@
-
+/* @group Base */
+.chzn-container {
+  font-size: 13px;
+  position: relative;
+  display: inline-block;
+  zoom: 1;
+  *display: inline;
+}
+.chzn-container .chzn-drop {
+  background: #fff;
+  border: 1px solid #aaa;
+  border-top: 0;
+  position: absolute;
+  top: 29px;
+  left: 0;
+  -webkit-box-shadow: 0 4px 5px rgba(0,0,0,.15);
+  -moz-box-shadow   : 0 4px 5px rgba(0,0,0,.15);
+  -o-box-shadow     : 0 4px 5px rgba(0,0,0,.15);
+  box-shadow        : 0 4px 5px rgba(0,0,0,.15);
+  z-index: 999;
+}
+/* @end */
+
+/* @group Single Chosen */
+.chzn-container-single .chzn-single {
+  background-color: #ffffff;
+  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ffffff', endColorstr='#eeeeee', GradientType=0 );   
+  background-image: -webkit-gradient(linear, 0% 0%, 0% 100%, color-stop(20%, #ffffff), color-stop(50%, #f6f6f6), color-stop(52%, #eeeeee), color-stop(100%, #f4f4f4));
+  background-image: -webkit-linear-gradient(top, #ffffff 20%, #f6f6f6 50%, #eeeeee 52%, #f4f4f4 100%);
+  background-image: -moz-linear-gradient(top, #ffffff 20%, #f6f6f6 50%, #eeeeee 52%, #f4f4f4 100%);
+  background-image: -o-linear-gradient(top, #ffffff 20%, #f6f6f6 50%, #eeeeee 52%, #f4f4f4 100%);
+  background-image: -ms-linear-gradient(top, #ffffff 20%, #f6f6f6 50%, #eeeeee 52%, #f4f4f4 100%);
+  background-image: linear-gradient(top, #ffffff 20%, #f6f6f6 50%, #eeeeee 52%, #f4f4f4 100%); 
+  -webkit-border-radius: 5px;
+  -moz-border-radius   : 5px;
+  border-radius        : 5px;
+  -moz-background-clip   : padding;
+  -webkit-background-clip: padding-box;
+  background-clip        : padding-box;
+  border: 1px solid #aaaaaa;
+  -webkit-box-shadow: 0 0 3px #ffffff inset, 0 1px 1px rgba(0,0,0,0.1);
+  -moz-box-shadow   : 0 0 3px #ffffff inset, 0 1px 1px rgba(0,0,0,0.1);
+  box-shadow        : 0 0 3px #ffffff inset, 0 1px 1px rgba(0,0,0,0.1);
+  display: block;
+  overflow: hidden;
+  white-space: nowrap;
+  position: relative;
+  height: 23px;
+  line-height: 24px;
+  padding: 0 0 0 8px;
+  color: #444444;
+  text-decoration: none;
+}
+.chzn-container-single .chzn-single span {
+  margin-right: 26px;
+  display: block;
+  overflow: hidden;
+  white-space: nowrap;
+  -o-text-overflow: ellipsis;
+  -ms-text-overflow: ellipsis;
+  text-overflow: ellipsis;
+}
+.chzn-container-single .chzn-single abbr {
+  display: block;
+  position: absolute;
+  right: 26px;
+  top: 6px;
+  width: 12px;
+  height: 13px;
+  font-size: 1px;
+  background: url(chosen-sprite.png) right top no-repeat;
+}
+.chzn-container-single .chzn-single abbr:hover {
+  background-position: right -11px;
+}
+.chzn-container-single .chzn-single div {
+  position: absolute;
+  right: 0;
+  top: 0;
+  display: block;
+  height: 100%;
+  width: 18px;
+}
+.chzn-container-single .chzn-single div b {
+  background: url('chosen-sprite.png') no-repeat 0 0;
+  display: block;
+  width: 100%;
+  height: 100%;
+}
+.chzn-container-single .chzn-search {
+  padding: 3px 4px;
+  position: relative;
+  margin: 0;
+  white-space: nowrap;
+  z-index: 1010;
+}
+.chzn-container-single .chzn-search input {
+  background: #fff url('chosen-sprite.png') no-repeat 100% -22px;
+  background: url('chosen-sprite.png') no-repeat 100% -22px, -webkit-gradient(linear, 0% 0%, 0% 100%, color-stop(1%, #eeeeee), color-stop(15%, #ffffff));
+  background: url('chosen-sprite.png') no-repeat 100% -22px, -webkit-linear-gradient(top, #eeeeee 1%, #ffffff 15%);
+  background: url('chosen-sprite.png') no-repeat 100% -22px, -moz-linear-gradient(top, #eeeeee 1%, #ffffff 15%);
+  background: url('chosen-sprite.png') no-repeat 100% -22px, -o-linear-gradient(top, #eeeeee 1%, #ffffff 15%);
+  background: url('chosen-sprite.png') no-repeat 100% -22px, -ms-linear-gradient(top, #eeeeee 1%, #ffffff 15%);
+  background: url('chosen-sprite.png') no-repeat 100% -22px, linear-gradient(top, #eeeeee 1%, #ffffff 15%);
+  margin: 1px 0;
+  padding: 4px 20px 4px 5px;
+  outline: 0;
+  border: 1px solid #aaa;
+  font-family: sans-serif;
+  font-size: 1em;
+}
+.chzn-container-single .chzn-drop {
+  -webkit-border-radius: 0 0 4px 4px;
+  -moz-border-radius   : 0 0 4px 4px;
+  border-radius        : 0 0 4px 4px;
+  -moz-background-clip   : padding;
+  -webkit-background-clip: padding-box;
+  background-clip        : padding-box;
+}
+/* @end */
+
+.chzn-container-single-nosearch .chzn-search input {
+  position: absolute;
+  left: -9000px;
+}
+
+/* @group Multi Chosen */
+.chzn-container-multi .chzn-choices {
+  background-color: #fff;
+  background-image: -webkit-gradient(linear, 0% 0%, 0% 100%, color-stop(1%, #eeeeee), color-stop(15%, #ffffff));
+  background-image: -webkit-linear-gradient(top, #eeeeee 1%, #ffffff 15%);
+  background-image: -moz-linear-gradient(top, #eeeeee 1%, #ffffff 15%);
+  background-image: -o-linear-gradient(top, #eeeeee 1%, #ffffff 15%);
+  background-image: -ms-linear-gradient(top, #eeeeee 1%, #ffffff 15%);
+  background-image: linear-gradient(top, #eeeeee 1%, #ffffff 15%);
+  border: 1px solid #aaa;
+  margin: 0;
+  padding: 0;
+  cursor: text;
+  overflow: hidden;
+  height: auto !important;
+  height: 1%;
+  position: relative;
+}
+.chzn-container-multi .chzn-choices li {
+  float: left;
+  list-style: none;
+}
+.chzn-container-multi .chzn-choices .search-field {
+  white-space: nowrap;
+  margin: 0;
+  padding: 0;
+}
+.chzn-container-multi .chzn-choices .search-field input {
+  color: #666;
+  background: transparent !important;
+  border: 0 !important;
+  font-family: sans-serif;
+  font-size: 100%;
+  height: 15px;
+  padding: 5px;
+  margin: 1px 0;
+  outline: 0;
+  -webkit-box-shadow: none;
+  -moz-box-shadow   : none;
+  -o-box-shadow     : none;
+  box-shadow        : none;
+}
+.chzn-container-multi .chzn-choices .search-field .default {
+  color: #999;
+}
+.chzn-container-multi .chzn-choices .search-choice {
+  -webkit-border-radius: 3px;
+  -moz-border-radius   : 3px;
+  border-radius        : 3px;
+  -moz-background-clip   : padding;
+  -webkit-background-clip: padding-box;
+  background-clip        : padding-box;
+  background-color: #e4e4e4;
+  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#f4f4f4', endColorstr='#eeeeee', GradientType=0 ); 
+  background-image: -webkit-gradient(linear, 0% 0%, 0% 100%, color-stop(20%, #f4f4f4), color-stop(50%, #f0f0f0), color-stop(52%, #e8e8e8), color-stop(100%, #eeeeee));
+  background-image: -webkit-linear-gradient(top, #f4f4f4 20%, #f0f0f0 50%, #e8e8e8 52%, #eeeeee 100%);
+  background-image: -moz-linear-gradient(top, #f4f4f4 20%, #f0f0f0 50%, #e8e8e8 52%, #eeeeee 100%);
+  background-image: -o-linear-gradient(top, #f4f4f4 20%, #f0f0f0 50%, #e8e8e8 52%, #eeeeee 100%);
+  background-image: -ms-linear-gradient(top, #f4f4f4 20%, #f0f0f0 50%, #e8e8e8 52%, #eeeeee 100%);
+  background-image: linear-gradient(top, #f4f4f4 20%, #f0f0f0 50%, #e8e8e8 52%, #eeeeee 100%); 
+  -webkit-box-shadow: 0 0 2px #ffffff inset, 0 1px 0 rgba(0,0,0,0.05);
+  -moz-box-shadow   : 0 0 2px #ffffff inset, 0 1px 0 rgba(0,0,0,0.05);
+  box-shadow        : 0 0 2px #ffffff inset, 0 1px 0 rgba(0,0,0,0.05);
+  color: #333;
+  border: 1px solid #aaaaaa;
+  line-height: 13px;
+  padding: 3px 20px 3px 5px;
+  margin: 3px 0 3px 5px;
+  position: relative;
+  cursor: default;
+}
+.chzn-container-multi .chzn-choices .search-choice-focus {
+  background: #d4d4d4;
+}
+.chzn-container-multi .chzn-choices .search-choice .search-choice-close {
+  display: block;
+  position: absolute;
+  right: 3px;
+  top: 4px;
+  width: 12px;
+  height: 13px;
+  font-size: 1px;
+  background: url(chosen-sprite.png) right top no-repeat;
+}
+.chzn-container-multi .chzn-choices .search-choice .search-choice-close:hover {
+  background-position: right -11px;
+}
+.chzn-container-multi .chzn-choices .search-choice-focus .search-choice-close {
+  background-position: right -11px;
+}
+/* @end */
+
+/* @group Results */
+.chzn-container .chzn-results {
+  margin: 0 4px 4px 0;
+  max-height: 240px;
+  padding: 0 0 0 4px;
+  position: relative;
+  overflow-x: hidden;
+  overflow-y: auto;
+}
+.chzn-container-multi .chzn-results {
+  margin: -1px 0 0;
+  padding: 0;
+}
+.chzn-container .chzn-results li {
+  display: none;
+  line-height: 15px;
+  padding: 5px 6px;
+  margin: 0;
+  list-style: none;
+}
+.chzn-container .chzn-results .active-result {
+  cursor: pointer;
+  display: list-item;
+}
+.chzn-container .chzn-results .highlighted {
+  background-color: #3875d7;
+  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#3875d7', endColorstr='#2a62bc', GradientType=0 );  
+  background-image: -webkit-gradient(linear, 0% 0%, 0% 100%, color-stop(20%, #3875d7), color-stop(90%, #2a62bc));
+  background-image: -webkit-linear-gradient(top, #3875d7 20%, #2a62bc 90%);
+  background-image: -moz-linear-gradient(top, #3875d7 20%, #2a62bc 90%);
+  background-image: -o-linear-gradient(top, #3875d7 20%, #2a62bc 90%);
+  background-image: -ms-linear-gradient(top, #3875d7 20%, #2a62bc 90%);
+  background-image: linear-gradient(top, #3875d7 20%, #2a62bc 90%);
+  color: #fff;
+}
+.chzn-container .chzn-results li em {
+  background: #feffde;
+  font-style: normal;
+}
+.chzn-container .chzn-results .highlighted em {
+  background: transparent;
+}
+.chzn-container .chzn-results .no-results {
+  background: #f4f4f4;
+  display: list-item;
+}
+.chzn-container .chzn-results .group-result {
+  cursor: default;
+  color: #999;
+  font-weight: bold;
+}
+.chzn-container .chzn-results .group-option {
+  padding-left: 15px;
+}
+.chzn-container-multi .chzn-drop .result-selected {
+  display: none;
+}
+.chzn-container .chzn-results-scroll {
+  background: white;
+  margin: 0 4px;
+  position: absolute;
+  text-align: center;
+  width: 321px; /* This should by dynamic with js */
+  z-index: 1;
+}
+.chzn-container .chzn-results-scroll span {
+  display: inline-block;
+  height: 17px;
+  text-indent: -5000px;
+  width: 9px;
+}
+.chzn-container .chzn-results-scroll-down {
+  bottom: 0;
+}
+.chzn-container .chzn-results-scroll-down span {
+  background: url('chosen-sprite.png') no-repeat -4px -3px;
+}
+.chzn-container .chzn-results-scroll-up span {
+  background: url('chosen-sprite.png') no-repeat -22px -3px;
+}
+/* @end */
+
+/* @group Active  */
+.chzn-container-active .chzn-single {
+  -webkit-box-shadow: 0 0 5px rgba(0,0,0,.3);
+  -moz-box-shadow   : 0 0 5px rgba(0,0,0,.3);
+  -o-box-shadow     : 0 0 5px rgba(0,0,0,.3);
+  box-shadow        : 0 0 5px rgba(0,0,0,.3);
+  border: 1px solid #5897fb;
+}
+.chzn-container-active .chzn-single-with-drop {
+  border: 1px solid #aaa;
+  -webkit-box-shadow: 0 1px 0 #fff inset;
+  -moz-box-shadow   : 0 1px 0 #fff inset;
+  -o-box-shadow     : 0 1px 0 #fff inset;
+  box-shadow        : 0 1px 0 #fff inset;
+  background-color: #eee;
+  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#eeeeee', endColorstr='#ffffff', GradientType=0 );
+  background-image: -webkit-gradient(linear, 0% 0%, 0% 100%, color-stop(20%, #eeeeee), color-stop(80%, #ffffff));
+  background-image: -webkit-linear-gradient(top, #eeeeee 20%, #ffffff 80%);
+  background-image: -moz-linear-gradient(top, #eeeeee 20%, #ffffff 80%);
+  background-image: -o-linear-gradient(top, #eeeeee 20%, #ffffff 80%);
+  background-image: -ms-linear-gradient(top, #eeeeee 20%, #ffffff 80%);
+  background-image: linear-gradient(top, #eeeeee 20%, #ffffff 80%);
+  -webkit-border-bottom-left-radius : 0;
+  -webkit-border-bottom-right-radius: 0;
+  -moz-border-radius-bottomleft : 0;
+  -moz-border-radius-bottomright: 0;
+  border-bottom-left-radius : 0;
+  border-bottom-right-radius: 0;
+}
+.chzn-container-active .chzn-single-with-drop div {
+  background: transparent;
+  border-left: none;
+}
+.chzn-container-active .chzn-single-with-drop div b {
+  background-position: -18px 1px;
+}
+.chzn-container-active .chzn-choices {
+  -webkit-box-shadow: 0 0 5px rgba(0,0,0,.3);
+  -moz-box-shadow   : 0 0 5px rgba(0,0,0,.3);
+  -o-box-shadow     : 0 0 5px rgba(0,0,0,.3);
+  box-shadow        : 0 0 5px rgba(0,0,0,.3);
+  border: 1px solid #5897fb;
+}
+.chzn-container-active .chzn-choices .search-field input {
+  color: #111 !important;
+}
+/* @end */
+
+/* @group Disabled Support */
+.chzn-disabled {
+  cursor: default;
+  opacity:0.5 !important;
+}
+.chzn-disabled .chzn-single {
+  cursor: default;
+}
+.chzn-disabled .chzn-choices .search-choice .search-choice-close {
+  cursor: default;
+}
+
+/* @group Right to Left */
+.chzn-rtl { text-align: right; }
+.chzn-rtl .chzn-single { padding: 0 8px 0 0; overflow: visible; }
+.chzn-rtl .chzn-single span { margin-left: 26px; margin-right: 0; direction: rtl; }
+
+.chzn-rtl .chzn-single div { left: 3px; right: auto; }
+.chzn-rtl .chzn-single abbr {
+  left: 26px;
+  right: auto;
+}
+.chzn-rtl .chzn-choices .search-field input { direction: rtl; }
+.chzn-rtl .chzn-choices li { float: right; }
+.chzn-rtl .chzn-choices .search-choice { padding: 3px 5px 3px 19px; margin: 3px 5px 3px 0; }
+.chzn-rtl .chzn-choices .search-choice .search-choice-close { left: 4px; right: auto; background-position: right top;}
+.chzn-rtl.chzn-container-single .chzn-results { margin: 0 0 4px 4px; padding: 0 4px 0 0; }
+.chzn-rtl .chzn-results .group-option { padding-left: 0; padding-right: 15px; }
+.chzn-rtl.chzn-container-active .chzn-single-with-drop div { border-right: none; }
+.chzn-rtl .chzn-search input {
+  background: #fff url('chosen-sprite.png') no-repeat -38px -22px;
+  background: url('chosen-sprite.png') no-repeat -38px -22px, -webkit-gradient(linear, 0% 0%, 0% 100%, color-stop(1%, #eeeeee), color-stop(15%, #ffffff));
+  background: url('chosen-sprite.png') no-repeat -38px -22px, -webkit-linear-gradient(top, #eeeeee 1%, #ffffff 15%);  
+  background: url('chosen-sprite.png') no-repeat -38px -22px, -moz-linear-gradient(top, #eeeeee 1%, #ffffff 15%);
+  background: url('chosen-sprite.png') no-repeat -38px -22px, -o-linear-gradient(top, #eeeeee 1%, #ffffff 15%);
+  background: url('chosen-sprite.png') no-repeat -38px -22px, -ms-linear-gradient(top, #eeeeee 1%, #ffffff 15%);
+  background: url('chosen-sprite.png') no-repeat -38px -22px, linear-gradient(top, #eeeeee 1%, #ffffff 15%);
+  padding: 4px 5px 4px 20px;
+  direction: rtl;
+}
+/* @end */
+

--- /dev/null
+++ b/ckanext/example/theme/public/scripts/chosen.jquery.min.js
@@ -1,1 +1,10 @@
+// Chosen, a Select Box Enhancer for jQuery and Protoype
+// by Patrick Filler for Harvest, http://getharvest.com
+// 
+// Version 0.9.7
+// Full source at https://github.com/harvesthq/chosen
+// Copyright (c) 2011 Harvest http://getharvest.com
 
+// MIT License, https://github.com/harvesthq/chosen/blob/master/LICENSE.md
+// This file is generated by `cake build`, do not edit it by hand.
+((function(){var a;a=function(){function a(){this.options_index=0,this.parsed=[]}return a.prototype.add_node=function(a){return a.nodeName==="OPTGROUP"?this.add_group(a):this.add_option(a)},a.prototype.add_group=function(a){var b,c,d,e,f,g;b=this.parsed.length,this.parsed.push({array_index:b,group:!0,label:a.label,children:0,disabled:a.disabled}),f=a.childNodes,g=[];for(d=0,e=f.length;d<e;d++)c=f[d],g.push(this.add_option(c,b,a.disabled));return g},a.prototype.add_option=function(a,b,c){if(a.nodeName==="OPTION")return a.text!==""?(b!=null&&(this.parsed[b].children+=1),this.parsed.push({array_index:this.parsed.length,options_index:this.options_index,value:a.value,text:a.text,html:a.innerHTML,selected:a.selected,disabled:c===!0?c:a.disabled,group_array_index:b,classes:a.className,style:a.style.cssText})):this.parsed.push({array_index:this.parsed.length,options_index:this.options_index,empty:!0}),this.options_index+=1},a}(),a.select_to_array=function(b){var c,d,e,f,g;d=new a,g=b.childNodes;for(e=0,f=g.length;e<f;e++)c=g[e],d.add_node(c);return d.parsed},this.SelectParser=a})).call(this),function(){var a,b;b=this,a=function(){function a(a,b){this.form_field=a,this.options=b!=null?b:{},this.set_default_values(),this.is_multiple=this.form_field.multiple,this.default_text_default=this.is_multiple?"Select Some Options":"Select an Option",this.setup(),this.set_up_html(),this.register_observers(),this.finish_setup()}return a.prototype.set_default_values=function(){var a=this;return this.click_test_action=function(b){return a.test_active_click(b)},this.activate_action=function(b){return a.activate_field(b)},this.active_field=!1,this.mouse_on_container=!1,this.results_showing=!1,this.result_highlighted=null,this.result_single_selected=null,this.allow_single_deselect=this.options.allow_single_deselect!=null&&this.form_field.options[0]!=null&&this.form_field.options[0].text===""?this.options.allow_single_deselect:!1,this.disable_search_threshold=this.options.disable_search_threshold||0,this.choices=0,this.results_none_found=this.options.no_results_text||"No results match"},a.prototype.mouse_enter=function(){return this.mouse_on_container=!0},a.prototype.mouse_leave=function(){return this.mouse_on_container=!1},a.prototype.input_focus=function(a){var b=this;if(!this.active_field)return setTimeout(function(){return b.container_mousedown()},50)},a.prototype.input_blur=function(a){var b=this;if(!this.mouse_on_container)return this.active_field=!1,setTimeout(function(){return b.blur_test()},100)},a.prototype.result_add_option=function(a){var b,c;return a.disabled?"":(a.dom_id=this.container_id+"_o_"+a.array_index,b=a.selected&&this.is_multiple?[]:["active-result"],a.selected&&b.push("result-selected"),a.group_array_index!=null&&b.push("group-option"),a.classes!==""&&b.push(a.classes),c=a.style.cssText!==""?' style="'+a.style+'"':"",'<li id="'+a.dom_id+'" class="'+b.join(" ")+'"'+c+">"+a.html+"</li>")},a.prototype.results_update_field=function(){return this.result_clear_highlight(),this.result_single_selected=null,this.results_build()},a.prototype.results_toggle=function(){return this.results_showing?this.results_hide():this.results_show()},a.prototype.results_search=function(a){return this.results_showing?this.winnow_results():this.results_show()},a.prototype.keyup_checker=function(a){var b,c;b=(c=a.which)!=null?c:a.keyCode,this.search_field_scale();switch(b){case 8:if(this.is_multiple&&this.backstroke_length<1&&this.choices>0)return this.keydown_backstroke();if(!this.pending_backstroke)return this.result_clear_highlight(),this.results_search();break;case 13:a.preventDefault();if(this.results_showing)return this.result_select(a);break;case 27:return this.results_showing&&this.results_hide(),!0;case 9:case 38:case 40:case 16:case 91:case 17:break;default:return this.results_search()}},a.prototype.generate_field_id=function(){var a;return a=this.generate_random_id(),this.form_field.id=a,a},a.prototype.generate_random_char=function(){var a,b,c;return a="0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZ",c=Math.floor(Math.random()*a.length),b=a.substring(c,c+1)},a}(),b.AbstractChosen=a}.call(this),function(){var a,b,c,d,e=Object.prototype.hasOwnProperty,f=function(a,b){function d(){this.constructor=a}for(var c in b)e.call(b,c)&&(a[c]=b[c]);return d.prototype=b.prototype,a.prototype=new d,a.__super__=b.prototype,a};d=this,a=jQuery,a.fn.extend({chosen:function(c){return!a.browser.msie||a.browser.version!=="6.0"&&a.browser.version!=="7.0"?a(this).each(function(d){if(!a(this).hasClass("chzn-done"))return new b(this,c)}):this}}),b=function(b){function e(){e.__super__.constructor.apply(this,arguments)}return f(e,b),e.prototype.setup=function(){return this.form_field_jq=a(this.form_field),this.is_rtl=this.form_field_jq.hasClass("chzn-rtl")},e.prototype.finish_setup=function(){return this.form_field_jq.addClass("chzn-done")},e.prototype.set_up_html=function(){var b,d,e,f;return this.container_id=this.form_field.id.length?this.form_field.id.replace(/(:|\.)/g,"_"):this.generate_field_id(),this.container_id+="_chzn",this.f_width=this.form_field_jq.outerWidth(),this.default_text=this.form_field_jq.data("placeholder")?this.form_field_jq.data("placeholder"):this.default_text_default,b=a("<div />",{id:this.container_id,"class":"chzn-container"+(this.is_rtl?" chzn-rtl":""),style:"width: "+this.f_width+"px;"}),this.is_multiple?b.html('<ul class="chzn-choices"><li class="search-field"><input type="text" value="'+this.default_text+'" class="default" autocomplete="off" style="width:25px;" /></li></ul><div class="chzn-drop" style="left:-9000px;"><ul class="chzn-results"></ul></div>'):b.html('<a href="javascript:void(0)" class="chzn-single"><span>'+this.default_text+'</span><div><b></b></div></a><div class="chzn-drop" style="left:-9000px;"><div class="chzn-search"><input type="text" autocomplete="off" /></div><ul class="chzn-results"></ul></div>'),this.form_field_jq.hide().after(b),this.container=a("#"+this.container_id),this.container.addClass("chzn-container-"+(this.is_multiple?"multi":"single")),this.dropdown=this.container.find("div.chzn-drop").first(),d=this.container.height(),e=this.f_width-c(this.dropdown),this.dropdown.css({width:e+"px",top:d+"px"}),this.search_field=this.container.find("input").first(),this.search_results=this.container.find("ul.chzn-results").first(),this.search_field_scale(),this.search_no_results=this.container.find("li.no-results").first(),this.is_multiple?(this.search_choices=this.container.find("ul.chzn-choices").first(),this.search_container=this.container.find("li.search-field").first()):(this.search_container=this.container.find("div.chzn-search").first(),this.selected_item=this.container.find(".chzn-single").first(),f=e-c(this.search_container)-c(this.search_field),this.search_field.css({width:f+"px"})),this.results_build(),this.set_tab_index(),this.form_field_jq.trigger("liszt:ready",{chosen:this})},e.prototype.register_observers=function(){var a=this;return this.container.mousedown(function(b){return a.container_mousedown(b)}),this.container.mouseup(function(b){return a.container_mouseup(b)}),this.container.mouseenter(function(b){return a.mouse_enter(b)}),this.container.mouseleave(function(b){return a.mouse_leave(b)}),this.search_results.mouseup(function(b){return a.search_results_mouseup(b)}),this.search_results.mouseover(function(b){return a.search_results_mouseover(b)}),this.search_results.mouseout(function(b){return a.search_results_mouseout(b)}),this.form_field_jq.bind("liszt:updated",function(b){return a.results_update_field(b)}),this.search_field.blur(function(b){return a.input_blur(b)}),this.search_field.keyup(function(b){return a.keyup_checker(b)}),this.search_field.keydown(function(b){return a.keydown_checker(b)}),this.is_multiple?(this.search_choices.click(function(b){return a.choices_click(b)}),this.search_field.focus(function(b){return a.input_focus(b)})):this.container.click(function(a){return a.preventDefault()})},e.prototype.search_field_disabled=function(){this.is_disabled=this.form_field_jq[0].disabled;if(this.is_disabled)return this.container.addClass("chzn-disabled"),this.search_field[0].disabled=!0,this.is_multiple||this.selected_item.unbind("focus",this.activate_action),this.close_field();this.container.removeClass("chzn-disabled"),this.search_field[0].disabled=!1;if(!this.is_multiple)return this.selected_item.bind("focus",this.activate_action)},e.prototype.container_mousedown=function(b){var c;if(!this.is_disabled)return c=b!=null?a(b.target).hasClass("search-choice-close"):!1,b&&b.type==="mousedown"&&b.stopPropagation(),!this.pending_destroy_click&&!c?(this.active_field?!this.is_multiple&&b&&(a(b.target)[0]===this.selected_item[0]||a(b.target).parents("a.chzn-single").length)&&(b.preventDefault(),this.results_toggle()):(this.is_multiple&&this.search_field.val(""),a(document).click(this.click_test_action),this.results_show()),this.activate_field()):this.pending_destroy_click=!1},e.prototype.container_mouseup=function(a){if(a.target.nodeName==="ABBR")return this.results_reset(a)},e.prototype.blur_test=function(a){if(!this.active_field&&this.container.hasClass("chzn-container-active"))return this.close_field()},e.prototype.close_field=function(){return a(document).unbind("click",this.click_test_action),this.is_multiple||(this.selected_item.attr("tabindex",this.search_field.attr("tabindex")),this.search_field.attr("tabindex",-1)),this.active_field=!1,this.results_hide(),this.container.removeClass("chzn-container-active"),this.winnow_results_clear(),this.clear_backstroke(),this.show_search_field_default(),this.search_field_scale()},e.prototype.activate_field=function(){return!this.is_multiple&&!this.active_field&&(this.search_field.attr("tabindex",this.selected_item.attr("tabindex")),this.selected_item.attr("tabindex",-1)),this.container.addClass("chzn-container-active"),this.active_field=!0,this.search_field.val(this.search_field.val()),this.search_field.focus()},e.prototype.test_active_click=function(b){return a(b.target).parents("#"+this.container_id).length?this.active_field=!0:this.close_field()},e.prototype.results_build=function(){var a,b,c,e,f;this.parsing=!0,this.results_data=d.SelectParser.select_to_array(this.form_field),this.is_multiple&&this.choices>0?(this.search_choices.find("li.search-choice").remove(),this.choices=0):this.is_multiple||(this.selected_item.find("span").text(this.default_text),this.form_field.options.length<=this.disable_search_threshold?this.container.addClass("chzn-container-single-nosearch"):this.container.removeClass("chzn-container-single-nosearch")),a="",f=this.results_data;for(c=0,e=f.length;c<e;c++)b=f[c],b.group?a+=this.result_add_group(b):b.empty||(a+=this.result_add_option(b),b.selected&&this.is_multiple?this.choice_build(b):b.selected&&!this.is_multiple&&(this.selected_item.find("span").text(b.text),this.allow_single_deselect&&this.single_deselect_control_build()));return this.search_field_disabled(),this.show_search_field_default(),this.search_field_scale(),this.search_results.html(a),this.parsing=!1},e.prototype.result_add_group=function(b){return b.disabled?"":(b.dom_id=this.container_id+"_g_"+b.array_index,'<li id="'+b.dom_id+'" class="group-result">'+a("<div />").text(b.label).html()+"</li>")},e.prototype.result_do_highlight=function(a){var b,c,d,e,f;if(a.length){this.result_clear_highlight(),this.result_highlight=a,this.result_highlight.addClass("highlighted"),d=parseInt(this.search_results.css("maxHeight"),10),f=this.search_results.scrollTop(),e=d+f,c=this.result_highlight.position().top+this.search_results.scrollTop(),b=c+this.result_highlight.outerHeight();if(b>=e)return this.search_results.scrollTop(b-d>0?b-d:0);if(c<f)return this.search_results.scrollTop(c)}},e.prototype.result_clear_highlight=function(){return this.result_highlight&&this.result_highlight.removeClass("highlighted"),this.result_highlight=null},e.prototype.results_show=function(){var a;return this.is_multiple||(this.selected_item.addClass("chzn-single-with-drop"),this.result_single_selected&&this.result_do_highlight(this.result_single_selected)),a=this.is_multiple?this.container.height():this.container.height()-1,this.dropdown.css({top:a+"px",left:0}),this.results_showing=!0,this.search_field.focus(),this.search_field.val(this.search_field.val()),this.winnow_results()},e.prototype.results_hide=function(){return this.is_multiple||this.selected_item.removeClass("chzn-single-with-drop"),this.result_clear_highlight(),this.dropdown.css({left:"-9000px"}),this.results_showing=!1},e.prototype.set_tab_index=function(a){var b;if(this.form_field_jq.attr("tabindex"))return b=this.form_field_jq.attr("tabindex"),this.form_field_jq.attr("tabindex",-1),this.is_multiple?this.search_field.attr("tabindex",b):(this.selected_item.attr("tabindex",b),this.search_field.attr("tabindex",-1))},e.prototype.show_search_field_default=function(){return this.is_multiple&&this.choices<1&&!this.active_field?(this.search_field.val(this.default_text),this.search_field.addClass("default")):(this.search_field.val(""),this.search_field.removeClass("default"))},e.prototype.search_results_mouseup=function(b){var c;c=a(b.target).hasClass("active-result")?a(b.target):a(b.target).parents(".active-result").first();if(c.length)return this.result_highlight=c,this.result_select(b)},e.prototype.search_results_mouseover=function(b){var c;c=a(b.target).hasClass("active-result")?a(b.target):a(b.target).parents(".active-result").first();if(c)return this.result_do_highlight(c)},e.prototype.search_results_mouseout=function(b){if(a(b.target).hasClass("active-result"))return this.result_clear_highlight()},e.prototype.choices_click=function(b){b.preventDefault();if(this.active_field&&!a(b.target).hasClass("search-choice")&&!this.results_showing)return this.results_show()},e.prototype.choice_build=function(b){var c,d,e=this;return c=this.container_id+"_c_"+b.array_index,this.choices+=1,this.search_container.before('<li class="search-choice" id="'+c+'"><span>'+b.html+'</span><a href="javascript:void(0)" class="search-choice-close" rel="'+b.array_index+'"></a></li>'),d=a("#"+c).find("a").first(),d.click(function(a){return e.choice_destroy_link_click(a)})},e.prototype.choice_destroy_link_click=function(b){return b.preventDefault(),this.is_disabled?b.stopPropagation:(this.pending_destroy_click=!0,this.choice_destroy(a(b.target)))},e.prototype.choice_destroy=function(a){return this.choices-=1,this.show_search_field_default(),this.is_multiple&&this.choices>0&&this.search_field.val().length<1&&this.results_hide(),this.result_deselect(a.attr("rel")),a.parents("li").first().remove()},e.prototype.results_reset=function(b){this.form_field.options[0].selected=!0,this.selected_item.find("span").text(this.default_text),this.show_search_field_default(),a(b.target).remove(),this.form_field_jq.trigger("change");if(this.active_field)return this.results_hide()},e.prototype.result_select=function(a){var b,c,d,e;if(this.result_highlight)return b=this.result_highlight,c=b.attr("id"),this.result_clear_highlight(),this.is_multiple?this.result_deactivate(b):(this.search_results.find(".result-selected").removeClass("result-selected"),this.result_single_selected=b),b.addClass("result-selected"),e=c.substr(c.lastIndexOf("_")+1),d=this.results_data[e],d.selected=!0,this.form_field.options[d.options_index].selected=!0,this.is_multiple?this.choice_build(d):(this.selected_item.find("span").first().text(d.text),this.allow_single_deselect&&this.single_deselect_control_build()),(!a.metaKey||!this.is_multiple)&&this.results_hide(),this.search_field.val(""),this.form_field_jq.trigger("change"),this.search_field_scale()},e.prototype.result_activate=function(a){return a.addClass("active-result")},e.prototype.result_deactivate=function(a){return a.removeClass("active-result")},e.prototype.result_deselect=function(b){var c,d;return d=this.results_data[b],d.selected=!1,this.form_field.options[d.options_index].selected=!1,c=a("#"+this.container_id+"_o_"+b),c.removeClass("result-selected").addClass("active-result").show(),this.result_clear_highlight(),this.winnow_results(),this.form_field_jq.trigger("change"),this.search_field_scale()},e.prototype.single_deselect_control_build=function(){if(this.allow_single_deselect&&this.selected_item.find("abbr").length<1)return this.selected_item.find("span").first().after('<abbr class="search-choice-close"></abbr>')},e.prototype.winnow_results=function(){var b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r;this.no_results_clear(),i=0,j=this.search_field.val()===this.default_text?"":a("<div/>").text(a.trim(this.search_field.val())).html(),f=new RegExp("^"+j.replace(/[-[\]{}()*+?.,\\^$|#\s]/g,"\\$&"),"i"),m=new RegExp(j.replace(/[-[\]{}()*+?.,\\^$|#\s]/g,"\\$&"),"i"),r=this.results_data;for(n=0,p=r.length;n<p;n++){c=r[n];if(!c.disabled&&!c.empty)if(c.group)a("#"+c.dom_id).css("display","none");else if(!this.is_multiple||!c.selected){b=!1,h=c.dom_id,g=a("#"+h);if(f.test(c.html))b=!0,i+=1;else if(c.html.indexOf(" ")>=0||c.html.indexOf("[")===0){e=c.html.replace(/\[|\]/g,"").split(" ");if(e.length)for(o=0,q=e.length;o<q;o++)d=e[o],f.test(d)&&(b=!0,i+=1)}b?(j.length?(k=c.html.search(m),l=c.html.substr(0,k+j.length)+"</em>"+c.html.substr(k+j.length),l=l.substr(0,k)+"<em>"+l.substr(k)):l=c.html,g.html(l),this.result_activate(g),c.group_array_index!=null&&a("#"+this.results_data[c.group_array_index].dom_id).css("display","list-item")):(this.result_highlight&&h===this.result_highlight.attr("id")&&this.result_clear_highlight(),this.result_deactivate(g))}}return i<1&&j.length?this.no_results(j):this.winnow_results_set_highlight()},e.prototype.winnow_results_clear=function(){var b,c,d,e,f;this.search_field.val(""),c=this.search_results.find("li"),f=[];for(d=0,e=c.length;d<e;d++)b=c[d],b=a(b),b.hasClass("group-result")?f.push(b.css("display","auto")):!this.is_multiple||!b.hasClass("result-selected")?f.push(this.result_activate(b)):f.push(void 0);return f},e.prototype.winnow_results_set_highlight=function(){var a,b;if(!this.result_highlight){b=this.is_multiple?[]:this.search_results.find(".result-selected.active-result"),a=b.length?b.first():this.search_results.find(".active-result").first();if(a!=null)return this.result_do_highlight(a)}},e.prototype.no_results=function(b){var c;return c=a('<li class="no-results">'+this.results_none_found+' "<span></span>"</li>'),c.find("span").first().html(b),this.search_results.append(c)},e.prototype.no_results_clear=function(){return this.search_results.find(".no-results").remove()},e.prototype.keydown_arrow=function(){var b,c;this.result_highlight?this.results_showing&&(c=this.result_highlight.nextAll("li.active-result").first(),c&&this.result_do_highlight(c)):(b=this.search_results.find("li.active-result").first(),b&&this.result_do_highlight(a(b)));if(!this.results_showing)return this.results_show()},e.prototype.keyup_arrow=function(){var a;if(!this.results_showing&&!this.is_multiple)return this.results_show();if(this.result_highlight)return a=this.result_highlight.prevAll("li.active-result"),a.length?this.result_do_highlight(a.first()):(this.choices>0&&this.results_hide(),this.result_clear_highlight())},e.prototype.keydown_backstroke=function(){return this.pending_backstroke?(this.choice_destroy(this.pending_backstroke.find("a").first()),this.clear_backstroke()):(this.pending_backstroke=this.search_container.siblings("li.search-choice").last(),this.pending_backstroke.addClass("search-choice-focus"))},e.prototype.clear_backstroke=function(){return this.pending_backstroke&&this.pending_backstroke.removeClass("search-choice-focus"),this.pending_backstroke=null},e.prototype.keydown_checker=function(a){var b,c;b=(c=a.which)!=null?c:a.keyCode,this.search_field_scale(),b!==8&&this.pending_backstroke&&this.clear_backstroke();switch(b){case 8:this.backstroke_length=this.search_field.val().length;break;case 9:this.results_showing&&!this.is_multiple&&this.result_select(a),this.mouse_on_container=!1;break;case 13:a.preventDefault();break;case 38:a.preventDefault(),this.keyup_arrow();break;case 40:this.keydown_arrow()}},e.prototype.search_field_scale=function(){var b,c,d,e,f,g,h,i,j;if(this.is_multiple){d=0,h=0,f="position:absolute; left: -1000px; top: -1000px; display:none;",g=["font-size","font-style","font-weight","font-family","line-height","text-transform","letter-spacing"];for(i=0,j=g.length;i<j;i++)e=g[i],f+=e+":"+this.search_field.css(e)+";";return c=a("<div />",{style:f}),c.text(this.search_field.val()),a("body").append(c),h=c.width()+25,c.remove(),h>this.f_width-10&&(h=this.f_width-10),this.search_field.css({width:h+"px"}),b=this.container.height(),this.dropdown.css({top:b+"px"})}},e.prototype.generate_random_id=function(){var b;b="sel"+this.generate_random_char()+this.generate_random_char()+this.generate_random_char();while(a("#"+b).length>0)b+=this.generate_random_char();return b},e}(AbstractChosen),c=function(a){var b;return b=a.outerWidth()-a.width()},d.get_side_border_padding=c}.call(this)

--- a/ckanext/example/theme/templates/forms/dataset_form.html
+++ b/ckanext/example/theme/templates/forms/dataset_form.html
@@ -147,7 +147,7 @@
   <dl>
     <dt class="tags-label"><label class="field_opt" for="tags_vocab">Tags</label></dt>
     <dd class="tags-field">
-      <select id="vocab_tags" name="vocab_tags" size="60" multiple="multiple">
+      <select id="vocab_tags" class="chzn-select" name="vocab_tags" size="60" multiple="multiple">
         <py:for each="tag in c.vocab_tags">
           <py:choose test="">
           <option py:when="tag in data.get('vocab_tags_selected', [])" selected="selected" value="${tag}">${tag}</option>