Fixes and refactors

Frontend/tools/xmlFormatter.html

@@ -74,6 +74,42 @@
             function init() {
                 setDefaultContent(document.getElementById("xmlArea"), 'Insert XML here');
             }
+
+            const editorEle = document.getElementById('xmlArea');
+
+            // Handle the `paste` event
+            editorEle.addEventListener('paste', function (e) {
+                // Prevent the default action
+                e.preventDefault();
+
+                // Get the copied text from the clipboard
+                const text = e.clipboardData
+                    ? (e.originalEvent || e).clipboardData.getData('text/plain')
+                    : // For IE
+                    window.clipboardData
+                        ? window.clipboardData.getData('Text')
+                        : '';
+
+                if (document.queryCommandSupported('insertText')) {
+                    document.execCommand('insertText', false, text);
+                } else {
+                    // Insert text at the current position of caret
+                    const range = document.getSelection().getRangeAt(0);
+                    range.deleteContents();
+
+                    const textNode = document.createTextNode(text);
+                    range.insertNode(textNode);
+                    range.selectNodeContents(textNode);
+                    range.collapse(false);
+
+                    const selection = window.getSelection();
+                    selection.removeAllRanges();
+                    selection.addRange(range);
+                
+                }
+                highlightSyntax(editorEle.id);
+                
+            });
         </script>
 
     </body>