fix: relaxed hover service request when scrolling

- do not render footer when scrolling
 - fix anchor word wrapping for long long links in the markdown
 - underline the link and change the cursor to pointer on hover
 - consider status-bar height when calculating hover top

Signed-off-by: Akos Kitta <a.kitta@arduino.cc>

arduino-ide-extension/src/browser/style/hover-service.css

@@ -4,7 +4,7 @@
 /* Adapted from https://github.com/microsoft/vscode/blob/7d9b1c37f8e5ae3772782ba3b09d827eb3fdd833/src/vs/workbench/services/hover/browser/hoverService.ts */
 
 :root {
-    --theia-hover-max-width: 200px;
+    --theia-hover-max-width: 200px; /* customized */
 }
 
 .theia-hover {
@@ -29,10 +29,13 @@
 
 .theia-hover a {
     color: var(--theia-textLink-foreground);
+    word-wrap: break-word; /* customized */
+    cursor: pointer; /* customized */
 }
 
 .theia-hover a:hover {
-    color: var(--theia-textLink-active-foreground);
+    /* color: var(--theia-textLink-active-foreground); */
+    text-decoration: underline; /* customized */
 }
 
 .theia-hover .hover-row .actions {

arduino-ide-extension/src/browser/style/list-widget.css

@@ -158,6 +158,10 @@
     padding-top: 8px;
 }
 
+.component-list-item .footer.scrolling {
+    visibility: hidden;
+}
+
 .component-list-item .footer > * {
     display: inline-block;
 }

arduino-ide-extension/src/browser/theia/core/hover-service.ts

@@ -144,7 +144,7 @@ export class HoverService {
     const documentWidth = document.body.getBoundingClientRect().width;
     // document.body.getBoundingClientRect().height doesn't work as expected
     // scrollHeight will always be accurate here: https://stackoverflow.com/a/44077777
-    const documentHeight = document.documentElement.scrollHeight;
+    const documentHeight = document.documentElement.scrollHeight - 22; // --theia-statusBar-height: 22px;
     position = HoverPosition.invertIfNecessary(
       position,
       targetDimensions,

arduino-ide-extension/src/browser/widgets/component-list/component-list-item.tsx

@@ -24,6 +24,7 @@ export class ComponentListItem<
           item,
           selectedVersion,
           inProgress: this.state.inProgress,
+          isScrolling: this.props.isScrolling,
           install: (item) => this.install(item),
           uninstall: (item) => this.uninstall(item),
           onVersionChange: (version) => this.onVersionChange(version),
@@ -88,6 +89,7 @@ export namespace ComponentListItem {
       selectedVersion: Installable.Version
     ) => void;
     readonly itemRenderer: ListItemRenderer<T>;
+    readonly isScrolling: boolean;
   }
 
   export interface State {

arduino-ide-extension/src/browser/widgets/component-list/component-list.tsx

@@ -2,16 +2,33 @@ import * as React from '@theia/core/shared/react';
 import { Virtuoso } from '@theia/core/shared/react-virtuoso';
 import { ArduinoComponent } from '../../../common/protocol/arduino-component';
 import { Installable } from '../../../common/protocol/installable';
+import { HoverService } from '../../theia/core/hover-service';
 import { ComponentListItem } from './component-list-item';
 import { ListItemRenderer } from './list-item-renderer';
 
 export class ComponentList<T extends ArduinoComponent> extends React.Component<
-  ComponentList.Props<T>
+  ComponentList.Props<T>,
+  ComponentList.State
 > {
+  constructor(props: Readonly<ComponentList.Props<T>>) {
+    super(props);
+    this.state = {
+      isScrolling: false,
+    };
+  }
+
   override render(): React.ReactNode {
     return (
       <Virtuoso
         data={this.props.items}
+        isScrolling={(isScrolling) => {
+          if (this.state.isScrolling !== isScrolling) {
+            this.setState({ isScrolling });
+            if (isScrolling) {
+              this.props.hoverService.cancelHover();
+            }
+          }
+        }}
         itemContent={(_: number, item: T) => (
           <ComponentListItem<T>
             key={this.props.itemLabel(item)}
@@ -21,6 +38,7 @@ export class ComponentList<T extends ArduinoComponent> extends React.Component<
             uninstall={this.props.uninstall}
             edited={this.props.edited}
             onItemEdit={this.props.onItemEdit}
+            isScrolling={this.state.isScrolling}
           />
         )}
       />
@@ -42,5 +60,9 @@ export namespace ComponentList {
       item: T,
       selectedVersion: Installable.Version
     ) => void;
+    readonly hoverService: HoverService;
+  }
+  export interface State {
+    isScrolling: boolean;
   }
 }

arduino-ide-extension/src/browser/widgets/component-list/filterable-list-container.tsx

@@ -15,6 +15,7 @@ import { ListItemRenderer } from './list-item-renderer';
 import { ResponseServiceClient } from '../../../common/protocol';
 import { nls } from '@theia/core/lib/common';
 import { DisposableCollection } from '@theia/core/lib/common/disposable';
+import { HoverService } from '../../theia/core/hover-service';
 
 export class FilterableListContainer<
   T extends ArduinoComponent,
@@ -93,6 +94,7 @@ export class FilterableListContainer<
         uninstall={this.uninstall.bind(this)}
         edited={this.state.edited}
         onItemEdit={this.onItemEdit.bind(this)}
+        hoverService={this.props.hoverService}
       />
     );
   }
@@ -193,6 +195,7 @@ export namespace FilterableListContainer {
       progressId: string;
     }) => Promise<void>;
     readonly commandService: CommandService;
+    readonly hoverService: HoverService;
   }
 
   export interface State<T, S extends Searchable.Options> {

arduino-ide-extension/src/browser/widgets/component-list/list-item-renderer.tsx

@@ -114,6 +114,7 @@ interface ListItemRendererParams<T extends ArduinoComponent> {
   readonly item: T;
   readonly selectedVersion: Installable.Version | undefined;
   readonly inProgress?: 'installing' | 'uninstalling' | undefined;
+  readonly isScrolling: boolean;
   readonly install: (item: T) => Promise<void>;
   readonly uninstall: (item: T) => Promise<void>;
   readonly onVersionChange: (version: Installable.Version) => void;
@@ -156,15 +157,17 @@ export class ListItemRenderer<T extends ArduinoComponent> {
 
   private readonly showHover = (
     event: React.MouseEvent<HTMLElement>,
-    markdown: string
+    params: ListItemRendererParams<T>
   ) => {
-    this.hoverService.requestHover({
+    if (!params.isScrolling) {
-      content: new MarkdownStringImpl(markdown),
+      const markdown = this.markdown(params);
-      target: event.currentTarget,
+      this.hoverService.requestHover({
-      position: 'right',
+        content: new MarkdownStringImpl(markdown),
-    });
+        target: event.currentTarget,
+        position: 'right',
+      });
+    }
   };
-
   renderItem(params: ListItemRendererParams<T>): React.ReactNode {
     const action = this.action(params);
     return (
@@ -172,7 +175,7 @@ export class ListItemRenderer<T extends ArduinoComponent> {
         <Separator />
         <div
           className="component-list-item noselect"
-          onMouseEnter={(event) => this.showHover(event, this.markdown(params))}
+          onMouseOver={(event) => this.showHover(event, params)}
         >
           <Header
             params={params}
@@ -650,8 +653,13 @@ class Footer<T extends ArduinoComponent> extends React.Component<
   }>
 > {
   override render(): React.ReactNode {
+    const { isScrolling } = this.props.params;
+    const className = ['footer'];
+    if (isScrolling) {
+      className.push('scrolling');
+    }
     return (
-      <div className="footer">
+      <div className={className.join(' ')}>
         <SelectVersion {...this.props} />
         <Button {...this.props} />
       </div>

arduino-ide-extension/src/browser/widgets/component-list/list-widget.tsx

@@ -21,6 +21,7 @@ import { FilterableListContainer } from './filterable-list-container';
 import { ListItemRenderer } from './list-item-renderer';
 import { NotificationCenter } from '../../notification-center';
 import { StatefulWidget } from '@theia/core/lib/browser';
+import { HoverService } from '../../theia/core/hover-service';
 
 @injectable()
 export abstract class ListWidget<
@@ -38,6 +39,8 @@ export abstract class ListWidget<
   private readonly commandService: CommandService;
   @inject(ResponseServiceClient)
   private readonly responseService: ResponseServiceClient;
+  @inject(HoverService)
+  private readonly hoverService: HoverService;
 
   /**
    * Do not touch or use it. It is for setting the focus on the `input` after the widget activation.
@@ -162,6 +165,7 @@ export abstract class ListWidget<
         commandService={this.commandService}
         responseService={this.responseService}
         onDidShow={this.onDidShowEmitter.event}
+        hoverService={this.hoverService}
       />
     );
   }