[CodeEditor/UrlDrilldown] Add fitToContent support, autoresize the url template editor (#175561)

## Summary

This PR fixes the paper cut where the URL template editor in URL
drilldown is unusably small. It now can expand as you type longer URLs
fix https://github.com/elastic/kibana/issues/132513

The input box now expands from 5 to 15 lines.

package.json

@@ -1064,7 +1064,6 @@
     "react-popper-tooltip": "^3.1.1",
     "react-redux": "^7.2.8",
     "react-resizable": "^3.0.4",
-    "react-resize-detector": "^7.1.1",
     "react-reverse-portal": "^2.1.0",
     "react-router": "^5.3.4",
     "react-router-config": "^5.1.1",

packages/shared-ux/code_editor/impl/BUILD.bazel

@@ -25,7 +25,6 @@ BUNDLER_DEPS = [
   "@npm//react",
   "@npm//tslib",
   "@npm//react-monaco-editor",
-  "@npm//react-resize-detector",
 ]
 
 js_library(

packages/shared-ux/code_editor/impl/code_editor.stories.tsx

@@ -6,7 +6,7 @@
  * Side Public License, v 1.
  */
 
-import React from 'react';
+import React, { useState } from 'react';
 
 import { action } from '@storybook/addon-actions';
 import { monaco as monacoEditor } from '@kbn/monaco';
@@ -32,7 +32,13 @@ const argTypes = mock.getArgumentTypes();
 
 export const Basic = (params: CodeEditorStorybookParams) => {
   return (
-    <CodeEditor {...params} languageId="plainText" onChange={action('on change')} value="Hello!" />
+    <CodeEditor
+      {...params}
+      languageId="plainText"
+      onChange={action('on change')}
+      value="Hello!"
+      height={200}
+    />
   );
 };
 
@@ -199,3 +205,39 @@ export const HoverProvider = () => {
     </div>
   );
 };
+
+export const AutomaticResize = (params: CodeEditorStorybookParams) => {
+  return (
+    <div style={{ height: `calc(100vh - 30px)` }}>
+      <CodeEditor
+        {...params}
+        languageId="plainText"
+        onChange={action('on change')}
+        value="Hello!"
+        height={'100%'}
+        options={{ automaticLayout: true }}
+      />
+    </div>
+  );
+};
+
+AutomaticResize.argTypes = argTypes;
+
+export const FitToContent = (params: CodeEditorStorybookParams) => {
+  const [value, setValue] = useState('hello');
+  return (
+    <CodeEditor
+      {...params}
+      languageId="plainText"
+      onChange={(newValue) => {
+        setValue(newValue);
+        action('on change');
+      }}
+      value={value}
+      fitToContent={{ minLines: 3, maxLines: 5 }}
+      options={{ automaticLayout: true }}
+    />
+  );
+};
+
+FitToContent.argTypes = argTypes;

packages/shared-ux/code_editor/impl/code_editor.tsx

@@ -7,7 +7,6 @@
  */
 
 import React, { useState, useRef, useCallback, useMemo, useEffect, KeyboardEvent } from 'react';
-import { useResizeDetector } from 'react-resize-detector';
 import ReactMonacoEditor, {
   type MonacoEditorProps as ReactMonacoEditorProps,
 } from 'react-monaco-editor';
@@ -140,6 +139,15 @@ export interface CodeEditorProps {
    * Alternate text to display, when an attempt is made to edit read only content. (Defaults to "Cannot edit in read-only editor")
    */
   readOnlyMessage?: string;
+
+  /**
+   * Enables the editor to grow vertically to fit its content.
+   * This option overrides the `height` option.
+   */
+  fitToContent?: {
+    minLines?: number;
+    maxLines?: number;
+  };
 }
 
 export const CodeEditor: React.FC<CodeEditorProps> = ({
@@ -168,6 +176,7 @@ export const CodeEditor: React.FC<CodeEditorProps> = ({
   readOnlyMessage = i18n.translate('sharedUXPackages.codeEditor.readOnlyMessage', {
     defaultMessage: 'Cannot edit in read-only editor',
   }),
+  fitToContent,
 }) => {
   const { colorMode, euiTheme } = useEuiTheme();
   const useDarkTheme = useDarkThemeProp ?? colorMode === 'DARK';
@@ -189,7 +198,7 @@ export const CodeEditor: React.FC<CodeEditorProps> = ({
 
   const isReadOnly = options?.readOnly ?? false;
 
-  const _editor = useRef<monaco.editor.IStandaloneCodeEditor | null>(null);
+  const [_editor, setEditor] = useState<monaco.editor.IStandaloneCodeEditor | null>(null);
   const _placeholderWidget = useRef<PlaceholderWidget | null>(null);
   const isSuggestionMenuOpen = useRef(false);
   const editorHint = useRef<HTMLDivElement>(null);
@@ -197,21 +206,10 @@ export const CodeEditor: React.FC<CodeEditorProps> = ({
 
   const [isHintActive, setIsHintActive] = useState(true);
 
-  const _updateDimensions = useCallback(() => {
-    _editor.current?.layout();
-  }, []);
-
-  useResizeDetector({
-    handleWidth: true,
-    handleHeight: true,
-    onResize: _updateDimensions,
-    refreshMode: 'debounce',
-  });
-
   const startEditing = useCallback(() => {
     setIsHintActive(false);
-    _editor.current?.focus();
-  }, []);
+    _editor?.focus();
+  }, [_editor]);
 
   const stopEditing = useCallback(() => {
     setIsHintActive(true);
@@ -391,8 +389,6 @@ export const CodeEditor: React.FC<CodeEditorProps> = ({
 
       remeasureFonts();
 
-      _editor.current = editor;
-
       const textbox = editor.getDomNode()?.getElementsByTagName('textarea')[0];
       if (textbox) {
         // Make sure the textarea is not directly accessible with TAB
@@ -435,6 +431,7 @@ export const CodeEditor: React.FC<CodeEditorProps> = ({
       }
 
       editorDidMount?.(editor);
+      setEditor(editor);
     },
     [editorDidMount, onBlurMonaco, onKeydownMonaco, readOnlyMessage]
   );
@@ -454,16 +451,18 @@ export const CodeEditor: React.FC<CodeEditorProps> = ({
   }, []);
 
   useEffect(() => {
-    if (placeholder && !value && _editor.current) {
+    if (placeholder && !value && _editor) {
       // Mounts editor inside constructor
-      _placeholderWidget.current = new PlaceholderWidget(placeholder, euiTheme, _editor.current);
+      _placeholderWidget.current = new PlaceholderWidget(placeholder, euiTheme, _editor);
     }
 
     return () => {
       _placeholderWidget.current?.dispose();
       _placeholderWidget.current = null;
     };
-  }, [placeholder, value, euiTheme]);
+  }, [placeholder, value, euiTheme, _editor]);
+
+  useFitToContent({ editor: _editor, fitToContent, isFullScreen });
 
   const { CopyButton } = useCopy({ isCopyable, value });
 
@@ -512,7 +511,7 @@ export const CodeEditor: React.FC<CodeEditorProps> = ({
           value={value}
           onChange={onChange}
           width={isFullScreen ? '100vw' : width}
-          height={isFullScreen ? '100vh' : height}
+          height={isFullScreen ? '100vh' : fitToContent ? undefined : height}
           editorWillMount={_editorWillMount}
           editorDidMount={_editorDidMount}
           editorWillUnmount={_editorWillUnmount}
@@ -640,3 +639,40 @@ const useCopy = ({ isCopyable, value }: { isCopyable: boolean; value: string })
 
   return { showCopyButton, CopyButton };
 };
+
+const useFitToContent = ({
+  editor,
+  fitToContent,
+  isFullScreen,
+}: {
+  editor: monaco.editor.IStandaloneCodeEditor | null;
+  isFullScreen: boolean;
+  fitToContent?: { minLines?: number; maxLines?: number };
+}) => {
+  const isFitToContent = !!fitToContent;
+  const minLines = fitToContent?.minLines;
+  const maxLines = fitToContent?.maxLines;
+  useEffect(() => {
+    if (!editor) return;
+    if (isFullScreen) return;
+    if (!isFitToContent) return;
+
+    const updateHeight = () => {
+      const contentHeight = editor.getContentHeight();
+      const lineHeight = editor.getOption(monaco.editor.EditorOption.lineHeight);
+      const minHeight = (minLines ?? 1) * lineHeight;
+      let maxHeight = maxLines ? maxLines * lineHeight : contentHeight;
+      maxHeight = Math.max(minHeight, maxHeight);
+      editor.layout({
+        height: Math.min(maxHeight, Math.max(minHeight, contentHeight)),
+        width: editor.getLayoutInfo().width,
+      });
+    };
+    updateHeight();
+    const disposable = editor.onDidContentSizeChange(updateHeight);
+    return () => {
+      disposable.dispose();
+      editor.layout(); // reset the layout that was controlled by the fitToContent
+    };
+  }, [editor, isFitToContent, minLines, maxLines, isFullScreen]);
+};

packages/shared-ux/code_editor/mocks/monaco_mock/index.tsx

@@ -106,7 +106,9 @@ export const MockedMonacoEditor = ({
   className?: string;
   ['data-test-subj']?: string;
 }) => {
-  editorWillMount?.(monaco);
+  useComponentWillMount(() => {
+    editorWillMount?.(monaco);
+  });
 
   useEffect(() => {
     editorDidMount?.(
@@ -133,3 +135,11 @@ export const MockedMonacoEditor = ({
     </div>
   );
 };
+
+const useComponentWillMount = (cb: Function) => {
+  const willMount = React.useRef(true);
+
+  if (willMount.current) cb();
+
+  willMount.current = false;
+};

src/plugins/kibana_react/public/url_template_editor/styles.scss

@@ -1,5 +1,5 @@
 .urlTemplateEditor__container {
   .monaco-editor .lines-content.monaco-editor-background {
-    margin: $euiSizeS;
+    margin: 0 $euiSizeS;
   }
 }

src/plugins/kibana_react/public/url_template_editor/url_template_editor.tsx

@@ -22,6 +22,7 @@ export interface UrlTemplateEditorVariable {
 export interface UrlTemplateEditorProps {
   value: string;
   height?: CodeEditorProps['height'];
+  fitToContent?: CodeEditorProps['fitToContent'];
   variables?: UrlTemplateEditorVariable[];
   onChange: CodeEditorProps['onChange'];
   onEditor?: (editor: monaco.editor.IStandaloneCodeEditor) => void;
@@ -31,6 +32,7 @@ export interface UrlTemplateEditorProps {
 
 export const UrlTemplateEditor: React.FC<UrlTemplateEditorProps> = ({
   height = 105,
+  fitToContent,
   value,
   variables,
   onChange,
@@ -127,6 +129,7 @@ export const UrlTemplateEditor: React.FC<UrlTemplateEditorProps> = ({
       <Editor
         languageId={HandlebarsLang}
         height={height}
+        fitToContent={fitToContent}
         value={value}
         onChange={onChange}
         editorDidMount={handleEditor}
@@ -152,6 +155,10 @@ export const UrlTemplateEditor: React.FC<UrlTemplateEditorProps> = ({
           },
           wordWrap: 'on',
           wrappingIndent: 'none',
+          automaticLayout: true,
+          scrollBeyondLastLine: false,
+          overviewRulerLanes: 0,
+          padding: { top: 8, bottom: 8 },
         }}
       />
     </div>

src/plugins/ui_actions_enhanced/public/drilldowns/url_drilldown/components/url_drilldown_collect_config/url_drilldown_collect_config.tsx

@@ -88,6 +88,7 @@ export const UrlDrilldownCollectConfig: React.FC<UrlDrilldownCollectConfigProps>
         labelAppend={variablesDropdown}
       >
         <UrlTemplateEditor
+          fitToContent={{ minLines: 5, maxLines: 15 }}
           variables={variables}
           value={urlTemplate}
           placeholder={exampleUrl}

yarn.lock

@@ -26016,13 +26016,6 @@ react-resizable@^3.0.4:
     prop-types "15.x"
     react-draggable "^4.0.3"
 
-react-resize-detector@^7.1.1:
-  version "7.1.1"
-  resolved "https://registry.yarnpkg.com/react-resize-detector/-/react-resize-detector-7.1.1.tgz#18d5b84909d5ab13abe0a68ddf0fb8e80c553dfc"
-  integrity sha512-rU54VTstNzFLZAmMNHqt8xINjDWP7SQR05A2HUW0OGvl4vcrXzgaxrrqAY5tZMfkLkoYm5u0i0qGqCjdc2jyAA==
-  dependencies:
-    lodash "^4.17.21"
-
 react-reverse-portal@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/react-reverse-portal/-/react-reverse-portal-2.1.0.tgz#3c572e1c0d9e49b8febf4bf2fd43b9819ce6f508"