eschutho commented on a change in pull request #13032:
URL: https://github.com/apache/superset/pull/13032#discussion_r573333239



##########
File path: superset-frontend/src/SqlLab/components/HighlightedSql.jsx
##########
@@ -41,79 +35,86 @@ const propTypes = {
   shrink: PropTypes.bool,
 };
 
-class HighlightedSql extends React.Component {
-  constructor(props) {
-    super(props);
-    this.state = {
-      modalBody: null,
-    };
-  }
+function HighlightedSql({
+  sql,
+  rawSql,
+  maxWidth = 50,
+  maxLines = 5,
+  shrink = false,
+}) {
+  const [modalBody, setModalBody] = useState(null);
 
-  shrinkSql() {
-    const ssql = this.props.sql || '';
+  const shrinkSql = useCallback(() => {
+    const ssql = sql || '';
     let lines = ssql.split('\n');
-    if (lines.length >= this.props.maxLines) {
-      lines = lines.slice(0, this.props.maxLines);
+    if (lines.length >= maxLines) {
+      lines = lines.slice(0, maxLines);
       lines.push('{...}');
     }
     return lines
       .map(line => {
-        if (line.length > this.props.maxWidth) {
-          return `${line.slice(0, this.props.maxWidth)}{...}`;
+        if (line.length > maxWidth) {
+          return `${line.slice(0, maxWidth)}{...}`;
         }
         return line;
       })
       .join('\n');
-  }
+  }, [maxLines, maxWidth, sql]);
 
-  triggerNode() {
-    const shownSql = this.props.shrink
-      ? this.shrinkSql(this.props.sql)
-      : this.props.sql;
+  const triggerNode = useCallback(() => {
+    const shownSql = shrink ? shrinkSql(sql) : sql;
     return (
       <SyntaxHighlighter language="sql" style={github}>
         {shownSql}
       </SyntaxHighlighter>
     );
-  }
+  }, [shrink, shrinkSql, sql]);
 
-  generateModal() {
-    let rawSql;
-    if (this.props.rawSql && this.props.rawSql !== this.props.sql) {
-      rawSql = (
+  const generateModal = useCallback(() => {
+    let internalRawSql;
+    if (rawSql && rawSql !== sql) {
+      internalRawSql = (
         <div>
           <h4>{t('Raw SQL')}</h4>
           <SyntaxHighlighter language="sql" style={github}>
-            {this.props.rawSql}
+            {rawSql}
           </SyntaxHighlighter>
         </div>
       );
     }
-    this.setState({
-      modalBody: (
-        <div>
-          <h4>{t('Source SQL')}</h4>
-          <SyntaxHighlighter language="sql" style={github}>
-            {this.props.sql}
-          </SyntaxHighlighter>
-          {rawSql}
-        </div>
-      ),
-    });
-  }
+    setModalBody(
+      <div>
+        <h4>{t('Source SQL')}</h4>
+        <SyntaxHighlighter language="sql" style={github}>
+          {sql}
+        </SyntaxHighlighter>
+        {internalRawSql}
+      </div>,
+    );
+  }, [rawSql, sql]);
 
-  render() {
-    return (
+  const [modalTrigger, setModalTrigger] = useState(
+    <ModalTrigger
+      modalTitle={t('SQL')}
+      triggerNode={triggerNode()}
+      modalBody={modalBody}
+      beforeOpen={() => generateModal()}

Review comment:
       did we get `beforeOpen={generateModal}` to work?




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