Javascript: Add `copy-to-clipboard` behavior

Utilizes `CopyToClipboard.js` from ipl-web

library/Icinga/Web/JavaScript.php

@@ -42,7 +42,8 @@ class JavaScript
         'js/icinga/behavior/selectable.js',
         'js/icinga/behavior/modal.js',
         'js/icinga/behavior/input-enrichment.js',
-        'js/icinga/behavior/datetime-picker.js'
+        'js/icinga/behavior/datetime-picker.js',
+        'js/icinga/behavior/copy-to-clipboard.js'
     ];
 
     protected static $vendorFiles = [];

public/js/icinga/behavior/copy-to-clipboard.js

@@ -0,0 +1,41 @@
+(function (Icinga) {
+
+    "use strict";
+
+    try {
+        var CopyToClipboard = require('icinga/icinga-php-library/widget/CopyToClipboard');
+    } catch (e) {
+        console.warn('Unable to provide copy to clipboard feature. Libraries not available:', e);
+        return;
+    }
+
+    class CopyToClipboardBehavior extends Icinga.EventListener {
+        constructor(icinga)
+        {
+            super(icinga);
+
+            this.on('rendered', '#main > .container', this.onRendered, this);
+
+            /**
+             * Clipboard buttons
+             *
+             * @type {WeakMap<object, CopyToClipboard>}
+             * @private
+             */
+            this._clipboards = new WeakMap();
+        }
+
+        onRendered(event)
+        {
+            let _this = event.data.self;
+
+            event.currentTarget.querySelectorAll('[data-icinga-clipboard]').forEach(button => {
+                _this._clipboards.set(button, new CopyToClipboard(button));
+            });
+        }
+    }
+
+    Icinga.Behaviors = Icinga.Behaviors || {};
+
+    Icinga.Behaviors.CopyToClipboardBehavior = CopyToClipboardBehavior;
+})(Icinga);