Code change:
<ins> /*--------------------------------------------------------------------------------------------- *  Copyright (c) Microsoft Corporation. All rights reserved. *  Licensed under the MIT License. See License.txt in the project root for license information. *--------------------------------------------------------------------------------------------*/ import { HoverWidget } from 'vs/base/browser/ui/hover/hoverWidget'; import { DisposableStore } from 'vs/base/common/lifecycle'; import { ContentWidgetPositionPreference, ICodeEditor, IContentWidgetPosition } from 'vs/editor/browser/editorBrowser'; import { EditorContextKeys } from 'vs/editor/common/editorContextKeys'; import { MultipleSizePersistingOptions, ResizableContentWidget, ResizableWidget } from 'vs/editor/contrib/hover/browser/resizableContentWidget'; import * as dom from 'vs/base/browser/dom'; import { ConfigurationChangedEvent, EditorOption } from 'vs/editor/common/config/editorOptions'; import { Position } from 'vs/editor/common/core/position'; import { HoverStartSource } from 'vs/editor/contrib/hover/browser/hoverOperation'; import { IContextKeyService } from 'vs/platform/contextkey/common/contextkey'; import { PositionAffinity } from 'vs/editor/common/model'; import { IEditorHoverColorPickerWidget } from 'vs/editor/contrib/hover/browser/hoverTypes'; const SCROLLBAR_WIDTH = 10; // TODO: maybe don't need the resizable widget class export class ResizableHoverWidget extends ResizableWidget { public ID = 'editor.contrib.resizableContentHoverWidget'; private hoverDisposables = new DisposableStore(); // The ContentWidget is a child of the resizable widget private resizableContentWidget: ResizableContentHoverWidget; public readonly allowEditorOverflow = true; public readonly _hover: HoverWidget = this.hoverDisposables.add(new HoverWidget()); private readonly editor: ICodeEditor; private readonly _hoverVisibleKey = EditorContextKeys.hoverVisible.bindTo(this._contextKeyService); private readonly _hoverFocusedKey = EditorContextKeys.hoverFocused.bindTo(this._contextKeyService); private readonly _focusTracker = this.hoverDisposables.add(dom.trackFocus(this.getDomNode())); private readonly _horizontalScrollingBy: number = 30; private _visibleData: ContentHoverVisibleData | null = null; private _renderingAbove: ContentWidgetPositionPreference; constructor( editor: ICodeEditor, @IContextKeyService private readonly _contextKeyService: IContextKeyService ) { super(editor, new MultipleSizePersistingOptions()); this.editor = editor; // create here the dom node and all other logic should go here that was in the super abstract class this.resizableContentWidget = new ResizableContentHoverWidget(this, editor); this._renderingAbove = this.editor.getOption(EditorOption.hover).above ? ContentWidgetPositionPreference.ABOVE : ContentWidgetPositionPreference.BELOW; this.hoverDisposables.add(this.element.onDidResize((e) => { // When the resizable hover overlay changes, resize the widget // this._widget.resize(e.dimension); })); this.hoverDisposables.add(this.editor.onDidLayoutChange(() => this._layout())); this.hoverDisposables.add(this.editor.onDidChangeConfiguration((e: ConfigurationChangedEvent) => { if (e.hasChanged(EditorOption.fontInfo)) { this._updateFont(); } })); this._setVisibleData(null); this._layout(); this.hoverDisposables.add(this._focusTracker.onDidFocus(() => { this._hoverFocusedKey.set(true); })); this.hoverDisposables.add(this._focusTracker.onDidBlur(() => { this._hoverFocusedKey.set(false); })); dom.append(this.element.domNode, this._hover.containerDomNode); } public get position(): Position | null { return this._visibleData?.showAtPosition ?? null; } public get isColorPickerVisible(): boolean { return Boolean(this._visibleData?.colorPicker); } public get isVisibleFromKeyboard(): boolean { return (this._visibleData?.source === HoverStartSource.Keyboard); } public get isVisible(): boolean { return this._hoverVisibleKey.get() ?? false; } public get renderingAbove(): ContentWidgetPositionPreference { return this._renderingAbove; } public set renderingAbove(renderingAbove: ContentWidgetPositionPreference) { this._renderingAbove = renderingAbove; } // NEW public override resize(size: dom.Dimension) { console.log('Inside of resize'); // Removing the max height and max width here - the max size is controlled by the resizable overlay this._hover.contentsDomNode.style.maxHeight = 'none'; this._hover.contentsDomNode.style.maxWidth = 'none'; const width = size.width + 'px'; // const width = size.width - 2 * SASH_WIDTH + TOTAL_BORDER_WIDTH + 'px'; this._hover.containerDomNode.style.width = width; this._hover.contentsDomNode.style.width = width; // const height = size.height - 2 * SASH_WIDTH + TOTAL_BORDER_WIDTH + 'px'; const height = size.height + 'px'; this._hover.containerDomNode.style.height = height; this._hover.contentsDomNode.style.height = height; const scrollDimensions = this._hover.scrollbar.getScrollDimensions(); const hasHorizontalScrollbar = (scrollDimensions.scrollWidth > scrollDimensions.width); if (hasHorizontalScrollbar) { // When there is a horizontal scroll-bar use a different height to make the scroll-bar visible const extraBottomPadding = `${this._hover.scrollbar.options.horizontalScrollbarSize}px`; if (this._hover.contentsDomNode.style.paddingBottom !== extraBottomPadding) { this._hover.contentsDomNode.style.paddingBottom = extraBottomPadding; } this._hover.contentsDomNode.style.height = size.height - SCROLLBAR_WIDTH + 'px'; // - 2 * SASH_WIDTH + TOTAL_BORDER_WIDTH } this._hover.scrollbar.scanDomNode(); this.editor.layoutContentWidget(this.resizableContentWidget); this.editor.render(); } public override findMaximumRenderingHeight(): number | undefined { if (!this.editor || !this.editor.hasModel() || !this._visibleData?.showAtPosition) { return; } const editorBox = dom.getDomNodePagePosition(this.editor.getDomNode()); const mouseBox = this.editor.getScrolledVisiblePosition(this._visibleData.showAtPosition); const bodyBox = dom.getClientArea(document.body); let availableSpace: number; if (this._renderingAbove === ContentWidgetPositionPreference.ABOVE) { availableSpace = editorBox.top + mouseBox.top - 30; } else { const mouseBottom = editorBox.top + mouseBox!.top + mouseBox!.height; availableSpace = bodyBox.height - mouseBottom; } let divMaxHeight = 0; for (const childHtmlElement of this._hover.contentsDomNode.children) { divMaxHeight += childHtmlElement.clientHeight; } if (this._hover.contentsDomNode.clientWidth < this._hover.contentsDomNode.scrollWidth) { divMaxHeight += SCROLLBAR_WIDTH; } return Math.min(availableSpace, divMaxHeight); } public findMaxRenderingWidth(): number | undefined { if (!this.editor || !this.editor.hasModel()) { return; } const editorBox = dom.getDomNodePagePosition(this.editor.getDomNode()); const widthOfEditor = editorBox.width; const leftOfEditor = editorBox.left; const glyphMarginWidth = this.editor.getLayoutInfo().glyphMarginWidth; const leftOfContainer = this._hover.containerDomNode.offsetLeft; return widthOfEditor + leftOfEditor - leftOfContainer - glyphMarginWidth; } public override dispose(): void { this.editor.removeContentWidget(this.resizableContentWidget); if (this._visibleData) { this._visibleData.disposables.dispose(); } super.dispose(); } public getDomNode() { return this._hover.containerDomNode; } public getContentsDomNode() { return this._hover.contentsDomNode; } public isMouseGettingCloser(posx: number, posy: number): boolean { if (!this._visibleData) { return false; } if (typeof this._visibleData.initialMousePosX === 'undefined' || typeof this._visibleData.initialMousePosY === 'undefined') { this._visibleData.initialMousePosX = posx; this._visibleData.initialMousePosY = posy; return false; } const widgetRect = dom.getDomNodePagePosition(this.resizableContentWidget.getDomNode()); if (typeof this._visibleData.closestMouseDistance === 'undefined') { this._visibleData.closestMouseDistance = computeDistanceFromPointToRectangle(this._visibleData.initialMousePosX, this._visibleData.initialMousePosY, widgetRect.left, widgetRect.top, widgetRect.width, widgetRect.height); } const distance = computeDistanceFromPointToRectangle(posx, posy, widgetRect.left, widgetRect.top, widgetRect.width, widgetRect.height); if (!distance || !this._visibleData.closestMouseDistance || distance > this._visibleData.closestMouseDistance + 4 /* tolerance of 4 pixels */) { // The mouse is getting farther away return false; } this._visibleData.closestMouseDistance = Math.min(this._visibleData.closestMouseDistance, distance); return true; } private _setVisibleData(visibleData: ContentHoverVisibleData | null): void { if (this._visibleData) { this._visibleData.disposables.dispose(); } this._visibleData = visibleData; this._hoverVisibleKey.set(!!this._visibleData); this._hover.containerDomNode.classList.toggle('hidden', !this._visibleData); } private _layout(): void { const height = Math.max(this.editor.getLayoutInfo().height / 4, 250); const { fontSize, lineHeight } = this.editor.getOption(EditorOption.fontInfo); this._hover.contentsDomNode.style.fontSize = `${fontSize}px`; this._hover.contentsDomNode.style.lineHeight = `${lineHeight / fontSize}`; this._hover.contentsDomNode.style.maxHeight = `${height}px`; this._hover.contentsDomNode.style.maxWidth = `${Math.max(this.editor.getLayoutInfo().width * 0.66, 500)}px`; } private _updateFont(): void { const codeClasses: HTMLElement[] = Array.prototype.slice.call(this._hover.contentsDomNode.getElementsByClassName('code')); codeClasses.forEach(node => this.editor.applyFontInfo(node)); } public showAt(node: DocumentFragment, visibleData: ContentHoverVisibleData): void { this.editor.addContentWidget(this.resizableContentWidget); const persistedSize = this.findPersistedSize(); if (!this.editor || !this.editor.hasModel()) { return; } this._setVisibleData(visibleData); this._hover.contentsDomNode.textContent = ''; this._hover.contentsDomNode.appendChild(node); this._hover.contentsDomNode.style.paddingBottom = ''; this._updateFont(); const containerDomNode = this.resizableContentWidget.getDomNode(); let height; // If the persisted size has already been found then set a maximum height and width if (!persistedSize) { this._hover.contentsDomNode.style.maxHeight = `${Math.max(this.editor.getLayoutInfo().height / 4, 250)}px`; this._hover.contentsDomNode.style.maxWidth = `${Math.max(this.editor.getLayoutInfo().width * 0.66, 500)}px`; this.onContentsChanged(); // Simply force a synchronous render on the editor // such that the widget does not really render with left = '0px' this.editor.render(); height = containerDomNode.clientHeight; } // When there is a persisted size then do not use a maximum height or width else { this._hover.contentsDomNode.style.maxHeight = 'none'; this._hover.contentsDomNode.style.maxWidth = 'none'; height = persistedSize.height; } // The dimensions of the document in which we are displaying the hover const bodyBox = dom.getClientArea(document.body); // Hard-coded in the hover.css file as 1.5em or 24px const minHeight = 24; // The full height is already passed in as a parameter const fullHeight = height; const editorBox = dom.getDomNodePagePosition(this.editor.getDomNode()); const mouseBox = this.editor.getScrolledVisiblePosition(visibleData.showAtPosition); // Position where the editor box starts + the top of the mouse box relatve to the editor + mouse box height const mouseBottom = editorBox.top + mouseBox.top + mouseBox.height; // Total height of the box minus the position of the bottom of the mouse, this is the maximum height below the mouse position const availableSpaceBelow = bodyBox.height - mouseBottom; // Max height below is the minimum of the available space below and the full height of the widget const maxHeightBelow = Math.min(availableSpaceBelow, fullHeight); // The available space above the mouse position is the height of the top of the editor plus the top of the mouse box relative to the editor const availableSpaceAbove = editorBox.top + mouseBox.top - 30; const maxHeightAbove = Math.min(availableSpaceAbove, fullHeight); // We find the maximum height of the widget possible on the top or on the bottom const maxHeight = Math.min(Math.max(maxHeightAbove, maxHeightBelow), fullHeight); if (height < minHeight) { height = minHeight; } if (height > maxHeight) { height = maxHeight; } // Determining whether we should render above or not ideally if (this.editor.getOption(EditorOption.hover).above) { this._renderingAbove = height <= maxHeightAbove ? ContentWidgetPositionPreference.ABOVE : ContentWidgetPositionPreference.BELOW; } else { this._renderingAbove = height <= maxHeightBelow ? ContentWidgetPositionPreference.BELOW : ContentWidgetPositionPreference.ABOVE; } // See https://github.com/microsoft/vscode/issues/140339 // TODO: Doing a second layout of the hover after force rendering the editor if (!persistedSize) { this.onContentsChanged(); } if (visibleData.stoleFocus) { this._hover.containerDomNode.focus(); } visibleData.colorPicker?.layout(); if (!this._visibleData) { return; } const clientHeight = this._hover.containerDomNode.clientHeight; const clientWidth = this._hover.containerDomNode.clientWidth; this.element.layout(clientHeight, clientWidth); this.resizableContentWidget.position = this._visibleData.showAtPosition; this.resizableContentWidget.secondaryPosition = this._visibleData.showAtSecondaryPosition; this.resizableContentWidget.preference = [this._renderingAbove]; this.resizableContentWidget.positionAffinity = this._visibleData.isBeforeContent ? PositionAffinity.LeftOfInjectedText : undefined; this.editor.layoutContentWidget(this.resizableContentWidget); this.editor.render(); console.log('At the end of showAt'); } public override hide(): void { this.element.clearSashHoverState(); if (this._visibleData) { const stoleFocus = this._visibleData.stoleFocus; this._setVisibleData(null); this.editor.layoutContentWidget(this.resizableContentWidget); if (stoleFocus) { this.editor.focus(); } } } // NEW public onContentsChanged(persistedSize?: dom.Dimension | undefined): void { console.log('Inside of onContentsChanged'); const containerDomNode = this.getDomNode(); const contentsDomNode = this.getContentsDomNode(); // Suppose a persisted size is defined if (persistedSize) { const widthMinusSash = Math.min(this.findMaximumRenderingWidth() ?? Infinity, persistedSize.width); //  - SASH_WIDTH // const heightMinusSash = Math.min(this.findMaxRenderingHeight(this._renderingAbove) ?? Infinity, persistedSize.height - SASH_WIDTH); const heightMinusSash = Math.min(this.findMaximumRenderingHeight() ?? Infinity, persistedSize.height); // SASH_WIDTH // Already setting directly the height and width parameters containerDomNode.style.width = widthMinusSash + 'px'; containerDomNode.style.height = heightMinusSash + 'px'; contentsDomNode.style.width = widthMinusSash + 'px'; contentsDomNode.style.height = heightMinusSash + 'px'; } else { // Otherwise the height and width are set to auto containerDomNode.style.width = 'auto'; containerDomNode.style.height = 'auto'; contentsDomNode.style.width = 'auto'; contentsDomNode.style.height = 'auto'; } this.editor.layoutContentWidget(this.resizableContentWidget); this._hover.onContentsChanged(); const scrollDimensions = this._hover.scrollbar.getScrollDimensions(); const hasHorizontalScrollbar = (scrollDimensions.scrollWidth > scrollDimensions.width); if (hasHorizontalScrollbar) { // There is just a horizontal scrollbar const extraBottomPadding = `${this._hover.scrollbar.options.horizontalScrollbarSize}px`; let reposition = false; if (this._hover.contentsDomNode.style.paddingBottom !== extraBottomPadding) { this._hover.contentsDomNode.style.paddingBottom = extraBottomPadding; reposition = true; } const maxRenderingHeight = this.findMaximumRenderingHeight(); // Need the following code since we are using an exact height when using the persisted size. If not used the horizontal scrollbar would just not be visible. if (persistedSize && maxRenderingHeight) { containerDomNode.style.height = Math.min(maxRenderingHeight, persistedSize.height) + 'px'; //  - SASH_WIDTH contentsDomNode.style.height = Math.min(maxRenderingHeight, persistedSize.height - SCROLLBAR_WIDTH) + 'px'; //  - SASH_WIDTH reposition = true; } if (reposition) { this.editor.layoutContentWidget(this.resizableContentWidget); this._hover.onContentsChanged(); } } } // OLD FUNCTION /* public onContentsChanged(): void { this.editor.layoutContentWidget(this.resizableContentWidget); this._hover.onContentsChanged(); const scrollDimensions = this._hover.scrollbar.getScrollDimensions(); const hasHorizontalScrollbar = (scrollDimensions.scrollWidth > scrollDimensions.width); if (hasHorizontalScrollbar) { // There is just a horizontal scrollbar const extraBottomPadding = `${this._hover.scrollbar.options.horizontalScrollbarSize}px`; if (this._hover.contentsDomNode.style.paddingBottom !== extraBottomPadding) { this._hover.contentsDomNode.style.paddingBottom = extraBottomPadding; this.editor.layoutContentWidget(this.resizableContentWidget); this._hover.onContentsChanged(); } } } */ public clear(): void { this._hover.contentsDomNode.textContent = ''; } public focus(): void { this._hover.containerDomNode.focus(); } public scrollUp(): void { const scrollTop = this._hover.scrollbar.getScrollPosition().scrollTop; const fontInfo = this.editor.getOption(EditorOption.fontInfo); this._hover.scrollbar.setScrollPosition({ scrollTop: scrollTop - fontInfo.lineHeight }); } public scrollDown(): void { const scrollTop = this._hover.scrollbar.getScrollPosition().scrollTop; const fontInfo = this.editor.getOption(EditorOption.fontInfo); this._hover.scrollbar.setScrollPosition({ scrollTop: scrollTop + fontInfo.lineHeight }); } public scrollLeft(): void { const scrollLeft = this._hover.scrollbar.getScrollPosition().scrollLeft; this._hover.scrollbar.setScrollPosition({ scrollLeft: scrollLeft - this._horizontalScrollingBy }); } public scrollRight(): void { const scrollLeft = this._hover.scrollbar.getScrollPosition().scrollLeft; this._hover.scrollbar.setScrollPosition({ scrollLeft: scrollLeft + this._horizontalScrollingBy }); } public pageUp(): void { const scrollTop = this._hover.scrollbar.getScrollPosition().scrollTop; const scrollHeight = this._hover.scrollbar.getScrollDimensions().height; this._hover.scrollbar.setScrollPosition({ scrollTop: scrollTop - scrollHeight }); } public pageDown(): void { const scrollTop = this._hover.scrollbar.getScrollPosition().scrollTop; const scrollHeight = this._hover.scrollbar.getScrollDimensions().height; this._hover.scrollbar.setScrollPosition({ scrollTop: scrollTop + scrollHeight }); } public goToTop(): void { this._hover.scrollbar.setScrollPosition({ scrollTop: 0 }); } public goToBottom(): void { this._hover.scrollbar.setScrollPosition({ scrollTop: this._hover.scrollbar.getScrollDimensions().scrollHeight }); } public escape(): void { this.editor.focus(); } } export class ResizableContentHoverWidget extends ResizableContentWidget { public ID = 'editor.contrib.resizableContentHoverWidget'; private hoverDisposables = new DisposableStore(); constructor(resizableHoverWidget: ResizableHoverWidget, editor: ICodeEditor) { super(resizableHoverWidget, editor); console.log('Inside of resizable content hover widget'); } } class ContentHoverVisibleData { public closestMouseDistance: number | undefined = undefined; constructor( public readonly colorPicker: IEditorHoverColorPickerWidget | null, public readonly showAtPosition: Position, public readonly showAtSecondaryPosition: Position, public readonly preferAbove: boolean, public readonly stoleFocus: boolean, public readonly source: HoverStartSource, public readonly isBeforeContent: boolean, public initialMousePosX: number | undefined, public initialMousePosY: number | undefined, public readonly disposables: DisposableStore ) { } } function computeDistanceFromPointToRectangle(pointX: number, pointY: number, left: number, top: number, width: number, height: number): number { const x = (left + width / 2); // x center of rectangle const y = (top + height / 2); // y center of rectangle const dx = Math.max(Math.abs(pointX - x) - width / 2, 0); const dy = Math.max(Math.abs(pointY - y) - height / 2, 0); return Math.sqrt(dx * dx + dy * dy); } </ins>

Related discussion:
text: When you hover over a type in a TypeScript file, the tooltip that appears has a very low max width, making it difficult to read long type signatures.
I would include a screenshot but it's not easy to take a screenshot keeping the tooltip on screen!
! Errors are quite unreadable if the width does not adapt to the font size.
! it would be nice if the tip used the available space instead of wrapping at an arbitrary point in c# too
!
! Same problem using rust's language server.
General styling control would be very helpful. Also line-height. Another approach would be to have a bottom panel that displays the full error and the tooltip displays a shortened version.
!
! When using the auto import feature it is often impossible to differentiate whats what as the import path is cut off due to the limited width of the suggestions window.
Is this something we can adjust with custom css? It makes snippet infoormation very difficult to read as well. !
Same in Python. We have to jump through hoops trying to flow doc nicely. And when it appears OK on Windows, it breaks on Mac... ! And it is inconsistent. Ex, hover is OK ! But completion list decides to wrap. What gives? ! Looks like hover respects markdown while completion item doc is plain string and gets wrapped randomly.
!
Someone say long type signatures? !
Here is a workaround by hacking the file "C:Program FilesMicrosoft VS Coderesourcesappoutvsworkbench" Simply append the code above after the original content of file, and restart VSCode. (Title bar may alert a warning message "Not Supported" and hacked changes would be overridden by updating VSCode) !
It would be nice to have some control on the width. The above does work but vscode presents the message your installation may be corrupt on restarting.
Instead of hacking the CSS directly as mentioned above, I recommend using the to just override the current CSS. That way when VSCode updates, you can just reload the custom css file that you have specified (personally, I have a project where I hold configurations for my shell, Spacemacs, etc. and this custom CSS file goes there). Until it's officially supported, hacking the CSS is likely the best route.