fix(request-snippets): prevent scrolling errors from missing function (#7941)

* fix(request-snippets): prevent scrolling errors from missing function

* refactor(request-snippets): migrate to functional component

* fix(curl): remove undefined prop and function

* test(live-response): fix import of RequestSnippets

src/core/components/curl.jsx

@@ -21,7 +21,6 @@ export default class Curl extends React.Component {
       ? <SyntaxHighlighter
           language="bash"
           className="curl microlight"
-          onWheel={this.preventYScrollingBeyondElement}
           style={getStyle(get(config, "syntaxHighlight.theme"))}
           >
           {curl}

src/core/plugins/request-snippets/index.js

@@ -1,6 +1,6 @@
 import * as fn from "./fn"
 import * as selectors from "./selectors"
-import { RequestSnippets } from "./request-snippets"
+import RequestSnippets from "./request-snippets"
 export default () => {
   return {
     components: {

src/core/plugins/request-snippets/request-snippets.jsx

@@ -1,38 +1,10 @@
-import React from "react"
+import React, { useRef, useEffect, useState } from "react"
-import { CopyToClipboard } from "react-copy-to-clipboard"
 import PropTypes from "prop-types"
 import get from "lodash/get"
+import isFunction from "lodash/isFunction"
+import { CopyToClipboard } from "react-copy-to-clipboard"
 import { SyntaxHighlighter, getStyle } from "core/syntax-highlighting"
 
-export class RequestSnippets extends React.Component {
-  constructor() {
-    super()
-    this.state = {
-      activeLanguage: this.props?.requestSnippetsSelectors?.getSnippetGenerators()?.keySeq().first(),
-      expanded: this.props?.requestSnippetsSelectors?.getDefaultExpanded(),
-    }
-  }
-
-  static propTypes = {
-    request: PropTypes.object.isRequired,
-    requestSnippetsSelectors: PropTypes.object.isRequired,
-    getConfigs: PropTypes.object.isRequired,
-    requestSnippetsActions: PropTypes.object.isRequired,
-  }
-  render() {
-      const {request, getConfigs, requestSnippetsSelectors } = this.props
-      const snippetGenerators = requestSnippetsSelectors.getSnippetGenerators()
-      const activeLanguage = this.state.activeLanguage || snippetGenerators.keySeq().first()
-      const activeGenerator = snippetGenerators.get(activeLanguage)
-      const snippet = activeGenerator.get("fn")(request)
-      const onGenChange = (key) => {
-        const needsChange = activeLanguage !== key
-        if(needsChange) {
-          this.setState({
-            activeLanguage: key
-          })
-        }
-      }
 const style = {
   cursor: "pointer",
   lineHeight: 1,
@@ -45,6 +17,7 @@ export class RequestSnippets extends React.Component {
   boxShadow: "none",
   borderBottom: "none"
 }
+
 const activeStyle = {
   cursor: "pointer",
   lineHeight: 1,
@@ -61,19 +34,72 @@ export class RequestSnippets extends React.Component {
   zIndex: "9999",
   borderBottom: "none"
 }
-      const getBtnStyle = (key) => {
+
+const RequestSnippets = ({ request, requestSnippetsSelectors, getConfigs }) => {
+  const config = isFunction(getConfigs) ? getConfigs() : null
+  const canSyntaxHighlight = get(config, "syntaxHighlight") !== false && get(config, "syntaxHighlight.activated", true)
+  const rootRef = useRef(null)
+
+  const [activeLanguage, setActiveLanguage] = useState(requestSnippetsSelectors.getSnippetGenerators()?.keySeq().first())
+  const [isExpanded, setIsExpanded] = useState(requestSnippetsSelectors?.getDefaultExpanded())
+  useEffect(() => {
+    const doIt = () => {
+
+    }
+    doIt()
+  }, [])
+  useEffect(() => {
+    const childNodes = Array
+      .from(rootRef.current.childNodes)
+      .filter(node => !!node.nodeType && node.classList?.contains("curl-command"))
+    // eslint-disable-next-line no-use-before-define
+    childNodes.forEach(node => node.addEventListener("mousewheel", handlePreventYScrollingBeyondElement, { passive: false }))
+
+    return () => {
+      // eslint-disable-next-line no-use-before-define
+      childNodes.forEach(node => node.removeEventListener("mousewheel", handlePreventYScrollingBeyondElement))
+    }
+  }, [request])
+
+  const snippetGenerators = requestSnippetsSelectors.getSnippetGenerators()
+  const activeGenerator = snippetGenerators.get(activeLanguage)
+  const snippet = activeGenerator.get("fn")(request)
+
+  const handleGenChange = (key) => {
+    const needsChange = activeLanguage !== key
+    if (needsChange) {
+      setActiveLanguage(key)
+    }
+  }
+
+  const handleSetIsExpanded = () => {
+    setIsExpanded(!isExpanded)
+  }
+
+  const handleGetBtnStyle = (key) => {
     if (key === activeLanguage) {
       return activeStyle
     }
     return style
   }
-      const config = getConfigs()
 
-      const SnippetComponent = config?.syntaxHighlight?.activated
+  const handlePreventYScrollingBeyondElement = (e) => {
+    const { target, deltaY } = e
+    const { scrollHeight: contentHeight, offsetHeight: visibleHeight, scrollTop } = target
+    const scrollOffset = visibleHeight + scrollTop
+    const isElementScrollable = contentHeight > visibleHeight
+    const isScrollingPastTop = scrollTop === 0 && deltaY < 0
+    const isScrollingPastBottom = scrollOffset >= contentHeight && deltaY > 0
+
+    if (isElementScrollable && (isScrollingPastTop || isScrollingPastBottom)) {
+      e.preventDefault()
+    }
+  }
+
+  const SnippetComponent = canSyntaxHighlight
     ? <SyntaxHighlighter
       language={activeGenerator.get("syntax")}
       className="curl microlight"
-          onWheel={function(e) {return this.preventYScrollingBeyondElement(e)}}
       style={getStyle(get(config, "syntaxHighlight.theme"))}
     >
       {snippet}
@@ -81,30 +107,30 @@ export class RequestSnippets extends React.Component {
     :
     <textarea readOnly={true} className="curl" value={snippet}></textarea>
 
-    const expanded = this.state.expanded === undefined ? this.props?.requestSnippetsSelectors?.getDefaultExpanded() : this.state.expanded
   return (
-        <div>
+    <div className="request-snippets" ref={rootRef}>
+      Just a test
       <div style={{ width: "100%", display: "flex", justifyContent: "flex-start", alignItems: "center", marginBottom: "15px" }}>
         <h4
+          onClick={() => handleSetIsExpanded()}
           style={{ cursor: "pointer" }}
-              onClick={() => this.setState({expanded: !expanded})}
         >Snippets</h4>
         <button
-              onClick={() => this.setState({expanded: !expanded})}
+          onClick={() => handleSetIsExpanded()}
           style={{ border: "none", background: "none" }}
-              title={expanded ? "Collapse operation": "Expand operation"}
+          title={isExpanded ? "Collapse operation" : "Expand operation"}
         >
           <svg className="arrow" width="10" height="10">
-                <use href={expanded ? "#large-arrow-down" : "#large-arrow"} xlinkHref={expanded ? "#large-arrow-down" : "#large-arrow"} />
+            <use href={isExpanded ? "#large-arrow-down" : "#large-arrow"} xlinkHref={isExpanded ? "#large-arrow-down" : "#large-arrow"} />
           </svg>
         </button>
       </div>
       {
-            expanded && <div className="curl-command">
+        isExpanded && <div className="curl-command">
           <div style={{ paddingLeft: "15px", paddingRight: "10px", width: "100%", display: "flex" }}>
             {
               snippetGenerators.entrySeq().map(([key, gen]) => {
-                    return (<div style={getBtnStyle(key)} className="btn" key={key} onClick={() => onGenChange(key)}>
+                return (<div style={handleGetBtnStyle(key)} className="btn" key={key} onClick={() => handleGenChange(key)}>
                   <h4 style={key === activeLanguage ? { color: "white", } : {}}>{gen.get("title")}</h4>
                 </div>)
               })
@@ -121,7 +147,14 @@ export class RequestSnippets extends React.Component {
         </div>
       }
     </div>
-
   )  
 }
+
+RequestSnippets.propTypes = {
+  request: PropTypes.object.isRequired,
+  requestSnippetsSelectors: PropTypes.object.isRequired,
+  getConfigs: PropTypes.object.isRequired,
+  requestSnippetsActions: PropTypes.object,
 }
+
+export default RequestSnippets

test/mocha/components/live-response.jsx

@@ -6,7 +6,7 @@ import expect from "expect"
 import { shallow } from "enzyme"
 import LiveResponse from "components/live-response"
 import ResponseBody from "components/response-body"
-import { RequestSnippets } from "core/plugins/request-snippets/request-snippets"
+import RequestSnippets from "core/plugins/request-snippets/request-snippets"
 
 describe("<LiveResponse/>", function () {
   let request = fromJSOrdered({