Multiselect with select2

dmnverifierfrontend/src/main/resources/META-INF/resources/assets/css/select2.min.css

+.select2-container{box-sizing:border-box;display:inline-block;margin:0;position:relative;vertical-align:middle}.select2-container .select2-selection--single{box-sizing:border-box;cursor:pointer;display:block;height:28px;user-select:none;-webkit-user-select:none}.select2-container .select2-selection--single .select2-selection__rendered{display:block;padding-left:8px;padding-right:20px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.select2-container .select2-selection--single .select2-selection__clear{position:relative}.select2-container[dir="rtl"] .select2-selection--single .select2-selection__rendered{padding-right:8px;padding-left:20px}.select2-container .select2-selection--multiple{box-sizing:border-box;cursor:pointer;display:block;min-height:32px;user-select:none;-webkit-user-select:none}.select2-container .select2-selection--multiple .select2-selection__rendered{display:inline-block;overflow:hidden;padding-left:8px;text-overflow:ellipsis;white-space:nowrap}.select2-container .select2-search--inline{float:left}.select2-container .select2-search--inline .select2-search__field{box-sizing:border-box;border:none;font-size:100%;margin-top:5px;padding:0}.select2-container .select2-search--inline .select2-search__field::-webkit-search-cancel-button{-webkit-appearance:none}.select2-dropdown{background-color:white;border:1px solid #aaa;border-radius:4px;box-sizing:border-box;display:block;position:absolute;left:-100000px;width:100%;z-index:1051}.select2-results{display:block}.select2-results__options{list-style:none;margin:0;padding:0}.select2-results__option{padding:6px;user-select:none;-webkit-user-select:none}.select2-results__option[aria-selected]{cursor:pointer}.select2-container--open .select2-dropdown{left:0}.select2-container--open .select2-dropdown--above{border-bottom:none;border-bottom-left-radius:0;border-bottom-right-radius:0}.select2-container--open .select2-dropdown--below{border-top:none;border-top-left-radius:0;border-top-right-radius:0}.select2-search--dropdown{display:block;padding:4px}.select2-search--dropdown .select2-search__field{padding:4px;width:100%;box-sizing:border-box}.select2-search--dropdown .select2-search__field::-webkit-search-cancel-button{-webkit-appearance:none}.select2-search--dropdown.select2-search--hide{display:none}.select2-close-mask{border:0;margin:0;padding:0;display:block;position:fixed;left:0;top:0;min-height:100%;min-width:100%;height:auto;width:auto;opacity:0;z-index:99;background-color:#fff;filter:alpha(opacity=0)}.select2-hidden-accessible{border:0 !important;clip:rect(0 0 0 0) !important;-webkit-clip-path:inset(50%) !important;clip-path:inset(50%) !important;height:1px !important;overflow:hidden !important;padding:0 !important;position:absolute !important;width:1px !important;white-space:nowrap !important}.select2-container--default .select2-selection--single{background-color:#fff;border:1px solid #aaa;border-radius:4px}.select2-container--default .select2-selection--single .select2-selection__rendered{color:#444;line-height:28px}.select2-container--default .select2-selection--single .select2-selection__clear{cursor:pointer;float:right;font-weight:bold}.select2-container--default .select2-selection--single .select2-selection__placeholder{color:#999}.select2-container--default .select2-selection--single .select2-selection__arrow{height:26px;position:absolute;top:1px;right:1px;width:20px}.select2-container--default .select2-selection--single .select2-selection__arrow b{border-color:#888 transparent transparent transparent;border-style:solid;border-width:5px 4px 0 4px;height:0;left:50%;margin-left:-4px;margin-top:-2px;position:absolute;top:50%;width:0}.select2-container--default[dir="rtl"] .select2-selection--single .select2-selection__clear{float:left}.select2-container--default[dir="rtl"] .select2-selection--single .select2-selection__arrow{left:1px;right:auto}.select2-container--default.select2-container--disabled .select2-selection--single{background-color:#eee;cursor:default}.select2-container--default.select2-container--disabled .select2-selection--single .select2-selection__clear{display:none}.select2-container--default.select2-container--open .select2-selection--single .select2-selection__arrow b{border-color:transparent transparent #888 transparent;border-width:0 4px 5px 4px}.select2-container--default .select2-selection--multiple{background-color:white;border:1px solid #aaa;border-radius:4px;cursor:text}.select2-container--default .select2-selection--multiple .select2-selection__rendered{box-sizing:border-box;list-style:none;margin:0;padding:0 5px;width:100%}.select2-container--default .select2-selection--multiple .select2-selection__rendered li{list-style:none}.select2-container--default .select2-selection--multiple .select2-selection__clear{cursor:pointer;float:right;font-weight:bold;margin-top:5px;margin-right:10px;padding:1px}.select2-container--default .select2-selection--multiple .select2-selection__choice{background-color:#e4e4e4;border:1px solid #aaa;border-radius:4px;cursor:default;float:left;margin-right:5px;margin-top:5px;padding:0 5px}.select2-container--default .select2-selection--multiple .select2-selection__choice__remove{color:#999;cursor:pointer;display:inline-block;font-weight:bold;margin-right:2px}.select2-container--default .select2-selection--multiple .select2-selection__choice__remove:hover{color:#333}.select2-container--default[dir="rtl"] .select2-selection--multiple .select2-selection__choice,.select2-container--default[dir="rtl"] .select2-selection--multiple .select2-search--inline{float:right}.select2-container--default[dir="rtl"] .select2-selection--multiple .select2-selection__choice{margin-left:5px;margin-right:auto}.select2-container--default[dir="rtl"] .select2-selection--multiple .select2-selection__choice__remove{margin-left:2px;margin-right:auto}.select2-container--default.select2-container--focus .select2-selection--multiple{border:solid black 1px;outline:0}.select2-container--default.select2-container--disabled .select2-selection--multiple{background-color:#eee;cursor:default}.select2-container--default.select2-container--disabled .select2-selection__choice__remove{display:none}.select2-container--default.select2-container--open.select2-container--above .select2-selection--single,.select2-container--default.select2-container--open.select2-container--above .select2-selection--multiple{border-top-left-radius:0;border-top-right-radius:0}.select2-container--default.select2-container--open.select2-container--below .select2-selection--single,.select2-container--default.select2-container--open.select2-container--below .select2-selection--multiple{border-bottom-left-radius:0;border-bottom-right-radius:0}.select2-container--default .select2-search--dropdown .select2-search__field{border:1px solid #aaa}.select2-container--default .select2-search--inline .select2-search__field{background:transparent;border:none;outline:0;box-shadow:none;-webkit-appearance:textfield}.select2-container--default .select2-results>.select2-results__options{max-height:200px;overflow-y:auto}.select2-container--default .select2-results__option[role=group]{padding:0}.select2-container--default .select2-results__option[aria-disabled=true]{color:#999}.select2-container--default .select2-results__option[aria-selected=true]{background-color:#ddd}.select2-container--default .select2-results__option .select2-results__option{padding-left:1em}.select2-container--default .select2-results__option .select2-results__option .select2-results__group{padding-left:0}.select2-container--default .select2-results__option .select2-results__option .select2-results__option{margin-left:-1em;padding-left:2em}.select2-container--default .select2-results__option .select2-results__option .select2-results__option .select2-results__option{margin-left:-2em;padding-left:3em}.select2-container--default .select2-results__option .select2-results__option .select2-results__option .select2-results__option .select2-results__option{margin-left:-3em;padding-left:4em}.select2-container--default .select2-results__option .select2-results__option .select2-results__option .select2-results__option .select2-results__option .select2-results__option{margin-left:-4em;padding-left:5em}.select2-container--default .select2-results__option .select2-results__option .select2-results__option .select2-results__option .select2-results__option .select2-results__option .select2-results__option{margin-left:-5em;padding-left:6em}.select2-container--default .select2-results__option--highlighted[aria-selected]{background-color:#5897fb;color:white}.select2-container--default .select2-results__group{cursor:default;display:block;padding:6px}.select2-container--classic .select2-selection--single{background-color:#f7f7f7;border:1px solid #aaa;border-radius:4px;outline:0;background-image:-webkit-linear-gradient(top, #fff 50%, #eee 100%);background-image:-o-linear-gradient(top, #fff 50%, #eee 100%);background-image:linear-gradient(to bottom, #fff 50%, #eee 100%);background-repeat:repeat-x;filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#FFFFFFFF', endColorstr='#FFEEEEEE', GradientType=0)}.select2-container--classic .select2-selection--single:focus{border:1px solid #5897fb}.select2-container--classic .select2-selection--single .select2-selection__rendered{color:#444;line-height:28px}.select2-container--classic .select2-selection--single .select2-selection__clear{cursor:pointer;float:right;font-weight:bold;margin-right:10px}.select2-container--classic .select2-selection--single .select2-selection__placeholder{color:#999}.select2-container--classic .select2-selection--single .select2-selection__arrow{background-color:#ddd;border:none;border-left:1px solid #aaa;border-top-right-radius:4px;border-bottom-right-radius:4px;height:26px;position:absolute;top:1px;right:1px;width:20px;background-image:-webkit-linear-gradient(top, #eee 50%, #ccc 100%);background-image:-o-linear-gradient(top, #eee 50%, #ccc 100%);background-image:linear-gradient(to bottom, #eee 50%, #ccc 100%);background-repeat:repeat-x;filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#FFEEEEEE', endColorstr='#FFCCCCCC', GradientType=0)}.select2-container--classic .select2-selection--single .select2-selection__arrow b{border-color:#888 transparent transparent transparent;border-style:solid;border-width:5px 4px 0 4px;height:0;left:50%;margin-left:-4px;margin-top:-2px;position:absolute;top:50%;width:0}.select2-container--classic[dir="rtl"] .select2-selection--single .select2-selection__clear{float:left}.select2-container--classic[dir="rtl"] .select2-selection--single .select2-selection__arrow{border:none;border-right:1px solid #aaa;border-radius:0;border-top-left-radius:4px;border-bottom-left-radius:4px;left:1px;right:auto}.select2-container--classic.select2-container--open .select2-selection--single{border:1px solid #5897fb}.select2-container--classic.select2-container--open .select2-selection--single .select2-selection__arrow{background:transparent;border:none}.select2-container--classic.select2-container--open .select2-selection--single .select2-selection__arrow b{border-color:transparent transparent #888 transparent;border-width:0 4px 5px 4px}.select2-container--classic.select2-container--open.select2-container--above .select2-selection--single{border-top:none;border-top-left-radius:0;border-top-right-radius:0;background-image:-webkit-linear-gradient(top, #fff 0%, #eee 50%);background-image:-o-linear-gradient(top, #fff 0%, #eee 50%);background-image:linear-gradient(to bottom, #fff 0%, #eee 50%);background-repeat:repeat-x;filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#FFFFFFFF', endColorstr='#FFEEEEEE', GradientType=0)}.select2-container--classic.select2-container--open.select2-container--below .select2-selection--single{border-bottom:none;border-bottom-left-radius:0;border-bottom-right-radius:0;background-image:-webkit-linear-gradient(top, #eee 50%, #fff 100%);background-image:-o-linear-gradient(top, #eee 50%, #fff 100%);background-image:linear-gradient(to bottom, #eee 50%, #fff 100%);background-repeat:repeat-x;filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#FFEEEEEE', endColorstr='#FFFFFFFF', GradientType=0)}.select2-container--classic .select2-selection--multiple{background-color:white;border:1px solid #aaa;border-radius:4px;cursor:text;outline:0}.select2-container--classic .select2-selection--multiple:focus{border:1px solid #5897fb}.select2-container--classic .select2-selection--multiple .select2-selection__rendered{list-style:none;margin:0;padding:0 5px}.select2-container--classic .select2-selection--multiple .select2-selection__clear{display:none}.select2-container--classic .select2-selection--multiple .select2-selection__choice{background-color:#e4e4e4;border:1px solid #aaa;border-radius:4px;cursor:default;float:left;margin-right:5px;margin-top:5px;padding:0 5px}.select2-container--classic .select2-selection--multiple .select2-selection__choice__remove{color:#888;cursor:pointer;display:inline-block;font-weight:bold;margin-right:2px}.select2-container--classic .select2-selection--multiple .select2-selection__choice__remove:hover{color:#555}.select2-container--classic[dir="rtl"] .select2-selection--multiple .select2-selection__choice{float:right;margin-left:5px;margin-right:auto}.select2-container--classic[dir="rtl"] .select2-selection--multiple .select2-selection__choice__remove{margin-left:2px;margin-right:auto}.select2-container--classic.select2-container--open .select2-selection--multiple{border:1px solid #5897fb}.select2-container--classic.select2-container--open.select2-container--above .select2-selection--multiple{border-top:none;border-top-left-radius:0;border-top-right-radius:0}.select2-container--classic.select2-container--open.select2-container--below .select2-selection--multiple{border-bottom:none;border-bottom-left-radius:0;border-bottom-right-radius:0}.select2-container--classic .select2-search--dropdown .select2-search__field{border:1px solid #aaa;outline:0}.select2-container--classic .select2-search--inline .select2-search__field{outline:0;box-shadow:none}.select2-container--classic .select2-dropdown{background-color:#fff;border:1px solid transparent}.select2-container--classic .select2-dropdown--above{border-bottom:none}.select2-container--classic .select2-dropdown--below{border-top:none}.select2-container--classic .select2-results>.select2-results__options{max-height:200px;overflow-y:auto}.select2-container--classic .select2-results__option[role=group]{padding:0}.select2-container--classic .select2-results__option[aria-disabled=true]{color:grey}.select2-container--classic .select2-results__option--highlighted[aria-selected]{background-color:#3875d7;color:#fff}.select2-container--classic .select2-results__group{cursor:default;display:block;padding:6px}.select2-container--classic.select2-container--open .select2-dropdown{border-color:#5897fb}

dmnverifierfrontend/src/main/resources/META-INF/resources/css/stylesheets.css

@@ -139,10 +139,15 @@ select:focus::-ms-value {
 
 .dmn-verifier-header-item {
   margin: 8px 12px;
+  color: #0b3004;
+  cursor: pointer;
+  font-family: 'Open Sans', sans-serif;
+  font-size: 13px;
 }
 
 .dmn-verifier-select {
   flex-grow: 4;
+  font-family: 'Open Sans', sans-serif;
 }
 
 #dmn-verifier-types {
@@ -165,3 +170,9 @@ select:focus::-ms-value {
 .dmn-INFO {
   list-style-image: url("img/INFO.png");
 }
+
+span.select2 {
+  display: table;
+  table-layout: fixed;
+  width: 25% !important;
+}

dmnverifierfrontend/src/main/resources/META-INF/resources/index.html

@@ -14,6 +14,8 @@
         rel="stylesheet">
   <link href="https://unpkg.com/dmn-js@7.0.1/dist/assets/dmn-font/css/dmn.css" rel="stylesheet">
 
+  <link href="assets/css/select2.min.css" rel="stylesheet"/>
+
   <link href="css/stylesheets.css" rel="stylesheet" type="text/css"/>
   <link href="css/dmnEditorTabs.css" rel="stylesheet" type="text/css"/>
 </head>
@@ -49,6 +51,7 @@
 </div>
 <!-- load jquery -->
 <script src="https://unpkg.com/jquery@3.4.1/dist/jquery.js" type="text/javascript"></script>
+<script src="assets/js/select2.full.min.js"></script>
 <!-- load dmn modeler -->
 <script src="https://unpkg.com/dmn-js@7.0.1/dist/dmn-modeler.development.js"></script>
 

dmnverifierfrontend/src/main/resources/META-INF/resources/js/dmnVerifier.js

@@ -17,7 +17,7 @@ let $verifierTypes;
 
 // load types
 $.ajax({
-  url: dmnApi + 'verification/type',
+  url: dmnApi + 'verification/types',
   type: 'GET',
   contentType: 'text/xml',
   success: function (data) {
@@ -49,6 +49,14 @@ function cleanDmnVerifierRoot() {
   `);
   // add types
   $header.append($verifierTypes);
+  $verifierTypes.select2({
+    containerCssClass: "dmn-verifier-header-item dmn-verifier-select clickable",
+    placeholder: {
+      id: -1,
+      text: "All verifier"
+    },
+    allowClear: true
+  });
   // Add Button
   $header.append($(`
     <button class="clickable dmn-verifier-header-item" id="dmn-button-verify" onClick="checkVerifications()">
@@ -75,8 +83,16 @@ function getVerifications() {
     }
     let apiPath = dmnApi + 'verification';
     // check, if a verifier is preselected
-    if ($verifierTypes[0].selectedOptions[0].value !== 'all') {
-      apiPath += "/type/" + $verifierTypes[0].selectedOptions[0].value;
+    if ($verifierTypes[0].selectedOptions[0] !== undefined) {
+      apiPath += "/types";
+      for (let i = 0; i < $verifierTypes[0].selectedOptions.length; i++) {
+        if (i === 0) {
+          apiPath += '?';
+        } else {
+          apiPath += '&';
+        }
+        apiPath += 'typeName=' + $verifierTypes[0].selectedOptions[i].value;
+      }
     }
     $.ajax({
       url: apiPath,
@@ -115,10 +131,9 @@ function getVerifications() {
 
 function renderTypeOptions() {
   let $select = $(`
-    <select name="verifier" id="dmn-verifier-types"
+    <select name="verifier[]" id="dmn-verifier-types" multiple="multiple"
       class="dmn-verifier-header-item dmn-verifier-select clickable">
   `);
-  $select.append($(`<option value="all">All verifier</option>`));
   let currentOpt = '';
   let $curGroup;
   for (let i = 0; i < types.length; i++) {