Refactors: Reduces assumptions about line height.

This contains the parts of #194609 that we can already merge.
While it does not implement dynamic line heights, it is a first step in that direction.

Co-authored-by: Remco Haszing <remcohaszing@gmail.com>

src/vs/editor/browser/view/viewLayer.ts

@@ -22,12 +22,12 @@ export interface IVisibleLine extends ILine {
 	 * Return null if the HTML should not be touched.
 	 * Return the new HTML otherwise.
 	 */
-	renderLine(lineNumber: number, deltaTop: number, viewportData: ViewportData, sb: StringBuilder): boolean;
+	renderLine(lineNumber: number, deltaTop: number, lineHeight: number, viewportData: ViewportData, sb: StringBuilder): boolean;
 
 	/**
 	 * Layout the line.
 	 */
-	layoutLine(lineNumber: number, deltaTop: number): void;
+	layoutLine(lineNumber: number, deltaTop: number, lineHeight: number): void;
 }
 
 export interface ILine {
@@ -465,7 +465,7 @@ class ViewLayerRenderer<T extends IVisibleLine> {
 
 		for (let i = startIndex; i <= endIndex; i++) {
 			const lineNumber = rendLineNumberStart + i;
-			lines[i].layoutLine(lineNumber, deltaTop[lineNumber - deltaLN]);
+			lines[i].layoutLine(lineNumber, deltaTop[lineNumber - deltaLN], this.viewportData.lineHeight);
 		}
 	}
 
@@ -573,7 +573,7 @@ class ViewLayerRenderer<T extends IVisibleLine> {
 					continue;
 				}
 
-				const renderResult = line.renderLine(i + rendLineNumberStart, deltaTop[i], this.viewportData, sb);
+				const renderResult = line.renderLine(i + rendLineNumberStart, deltaTop[i], this.viewportData.lineHeight, this.viewportData, sb);
 				if (!renderResult) {
 					// line does not need rendering
 					continue;
@@ -603,7 +603,7 @@ class ViewLayerRenderer<T extends IVisibleLine> {
 					continue;
 				}
 
-				const renderResult = line.renderLine(i + rendLineNumberStart, deltaTop[i], this.viewportData, sb);
+				const renderResult = line.renderLine(i + rendLineNumberStart, deltaTop[i], this.viewportData.lineHeight, this.viewportData, sb);
 				if (!renderResult) {
 					// line does not need rendering
 					continue;

src/vs/editor/browser/view/viewOverlays.ts

@@ -9,7 +9,6 @@ import { DynamicViewOverlay } from 'vs/editor/browser/view/dynamicViewOverlay';
 import { IVisibleLine, IVisibleLinesHost, VisibleLinesCollection } from 'vs/editor/browser/view/viewLayer';
 import { ViewPart } from 'vs/editor/browser/view/viewPart';
 import { StringBuilder } from 'vs/editor/common/core/stringBuilder';
-import { IEditorConfiguration } from 'vs/editor/common/config/editorConfiguration';
 import { RenderingContext, RestrictedRenderingContext } from 'vs/editor/browser/view/renderingContext';
 import { ViewContext } from 'vs/editor/common/viewModel/viewContext';
 import * as viewEvents from 'vs/editor/common/viewEvents';
@@ -71,7 +70,7 @@ export class ViewOverlays extends ViewPart implements IVisibleLinesHost<ViewOver
 	// ---- begin IVisibleLinesHost
 
 	public createVisibleLine(): ViewOverlayLine {
-		return new ViewOverlayLine(this._context.configuration, this._dynamicOverlays);
+		return new ViewOverlayLine(this._dynamicOverlays);
 	}
 
 	// ---- end IVisibleLinesHost
@@ -84,12 +83,6 @@ export class ViewOverlays extends ViewPart implements IVisibleLinesHost<ViewOver
 
 	public override onConfigurationChanged(e: viewEvents.ViewConfigurationChangedEvent): boolean {
 		this._visibleLines.onConfigurationChanged(e);
-		const startLineNumber = this._visibleLines.getStartLineNumber();
-		const endLineNumber = this._visibleLines.getEndLineNumber();
-		for (let lineNumber = startLineNumber; lineNumber <= endLineNumber; lineNumber++) {
-			const line = this._visibleLines.getVisibleLine(lineNumber);
-			line.onConfigurationChanged(e);
-		}
 
 		const options = this._context.configuration.options;
 		const fontInfo = options.get(EditorOption.fontInfo);
@@ -149,15 +142,11 @@ export class ViewOverlays extends ViewPart implements IVisibleLinesHost<ViewOver
 
 export class ViewOverlayLine implements IVisibleLine {
 
-	private readonly _configuration: IEditorConfiguration;
 	private readonly _dynamicOverlays: DynamicViewOverlay[];
 	private _domNode: FastDomNode<HTMLElement> | null;
 	private _renderedContent: string | null;
-	private _lineHeight: number;
 
-	constructor(configuration: IEditorConfiguration, dynamicOverlays: DynamicViewOverlay[]) {
-		this._configuration = configuration;
-		this._lineHeight = this._configuration.options.get(EditorOption.lineHeight);
+	constructor(dynamicOverlays: DynamicViewOverlay[]) {
 		this._dynamicOverlays = dynamicOverlays;
 
 		this._domNode = null;
@@ -180,11 +169,8 @@ export class ViewOverlayLine implements IVisibleLine {
 	public onTokensChanged(): void {
 		// Nothing
 	}
-	public onConfigurationChanged(e: viewEvents.ViewConfigurationChangedEvent): void {
-		this._lineHeight = this._configuration.options.get(EditorOption.lineHeight);
-	}
 
-	public renderLine(lineNumber: number, deltaTop: number, viewportData: ViewportData, sb: StringBuilder): boolean {
+	public renderLine(lineNumber: number, deltaTop: number, lineHeight: number, viewportData: ViewportData, sb: StringBuilder): boolean {
 		let result = '';
 		for (let i = 0, len = this._dynamicOverlays.length; i < len; i++) {
 			const dynamicOverlay = this._dynamicOverlays[i];
@@ -198,21 +184,21 @@ export class ViewOverlayLine implements IVisibleLine {
 
 		this._renderedContent = result;
 
-		sb.appendString('<div style="position:absolute;top:');
+		sb.appendString('<div style="top:');
 		sb.appendString(String(deltaTop));
-		sb.appendString('px;width:100%;height:');
-		sb.appendString(String(this._lineHeight));
+		sb.appendString('px;height:');
+		sb.appendString(String(lineHeight));
 		sb.appendString('px;">');
 		sb.appendString(result);
 		sb.appendString('</div>');
 
 		return true;
 	}
 
-	public layoutLine(lineNumber: number, deltaTop: number): void {
+	public layoutLine(lineNumber: number, deltaTop: number, lineHeight: number): void {
 		if (this._domNode) {
 			this._domNode.setTop(deltaTop);
-			this._domNode.setHeight(this._lineHeight);
+			this._domNode.setHeight(lineHeight);
 		}
 	}
 }

src/vs/editor/browser/viewParts/currentLineHighlight/currentLineHighlight.css

@@ -9,6 +9,7 @@
 	left: 0;
 	top: 0;
 	box-sizing: border-box;
+	height: 100%;
 }
 
 .monaco-editor .margin-view-overlays .current-line {
@@ -17,8 +18,11 @@
 	left: 0;
 	top: 0;
 	box-sizing: border-box;
+	height: 100%;
 }
 
-.monaco-editor .margin-view-overlays .current-line.current-line-margin.current-line-margin-both {
+.monaco-editor
+	.margin-view-overlays
+	.current-line.current-line-margin.current-line-margin-both {
 	border-right: 0;
 }

src/vs/editor/browser/viewParts/currentLineHighlight/currentLineHighlight.ts

@@ -18,7 +18,6 @@ import { Position } from 'vs/editor/common/core/position';
 
 export abstract class AbstractLineHighlightOverlay extends DynamicViewOverlay {
 	private readonly _context: ViewContext;
-	protected _lineHeight: number;
 	protected _renderLineHighlight: 'none' | 'gutter' | 'line' | 'all';
 	protected _wordWrap: boolean;
 	protected _contentLeft: number;
@@ -39,7 +38,6 @@ export abstract class AbstractLineHighlightOverlay extends DynamicViewOverlay {
 
 		const options = this._context.configuration.options;
 		const layoutInfo = options.get(EditorOption.layoutInfo);
-		this._lineHeight = options.get(EditorOption.lineHeight);
 		this._renderLineHighlight = options.get(EditorOption.renderLineHighlight);
 		this._renderLineHighlightOnlyWhenFocus = options.get(EditorOption.renderLineHighlightOnlyWhenFocus);
 		this._wordWrap = layoutInfo.isViewportWrapping;
@@ -89,7 +87,6 @@ export abstract class AbstractLineHighlightOverlay extends DynamicViewOverlay {
 	public override onConfigurationChanged(e: viewEvents.ViewConfigurationChangedEvent): boolean {
 		const options = this._context.configuration.options;
 		const layoutInfo = options.get(EditorOption.layoutInfo);
-		this._lineHeight = options.get(EditorOption.lineHeight);
 		this._renderLineHighlight = options.get(EditorOption.renderLineHighlight);
 		this._renderLineHighlightOnlyWhenFocus = options.get(EditorOption.renderLineHighlightOnlyWhenFocus);
 		this._wordWrap = layoutInfo.isViewportWrapping;
@@ -208,7 +205,7 @@ export class CurrentLineHighlightOverlay extends AbstractLineHighlightOverlay {
 
 	protected _renderOne(ctx: RenderingContext, exact: boolean): string {
 		const className = 'current-line' + (this._shouldRenderInMargin() ? ' current-line-both' : '') + (exact ? ' current-line-exact' : '');
-		return `<div class="${className}" style="width:${Math.max(ctx.scrollWidth, this._contentWidth)}px; height:${this._lineHeight}px;"></div>`;
+		return `<div class="${className}" style="width:${Math.max(ctx.scrollWidth, this._contentWidth)}px;"></div>`;
 	}
 	protected _shouldRenderThis(): boolean {
 		return this._shouldRenderInContent();
@@ -221,7 +218,7 @@ export class CurrentLineHighlightOverlay extends AbstractLineHighlightOverlay {
 export class CurrentLineMarginHighlightOverlay extends AbstractLineHighlightOverlay {
 	protected _renderOne(ctx: RenderingContext, exact: boolean): string {
 		const className = 'current-line' + (this._shouldRenderInMargin() ? ' current-line-margin' : '') + (this._shouldRenderOther() ? ' current-line-margin-both' : '') + (this._shouldRenderInMargin() && exact ? ' current-line-exact-margin' : '');
-		return `<div class="${className}" style="width:${this._contentLeft}px; height:${this._lineHeight}px;"></div>`;
+		return `<div class="${className}" style="width:${this._contentLeft}px"></div>`;
 	}
 	protected _shouldRenderThis(): boolean {
 		return true;

src/vs/editor/browser/viewParts/decorations/decorations.css

@@ -9,4 +9,5 @@
 */
 .monaco-editor .lines-content .cdr {
 	position: absolute;
-}
+	height: 100%;
+}

src/vs/editor/browser/viewParts/decorations/decorations.ts

@@ -15,15 +15,13 @@ import { ViewContext } from 'vs/editor/common/viewModel/viewContext';
 export class DecorationsOverlay extends DynamicViewOverlay {
 
 	private readonly _context: ViewContext;
-	private _lineHeight: number;
 	private _typicalHalfwidthCharacterWidth: number;
 	private _renderResult: string[] | null;
 
 	constructor(context: ViewContext) {
 		super();
 		this._context = context;
 		const options = this._context.configuration.options;
-		this._lineHeight = options.get(EditorOption.lineHeight);
 		this._typicalHalfwidthCharacterWidth = options.get(EditorOption.fontInfo).typicalHalfwidthCharacterWidth;
 		this._renderResult = null;
 
@@ -40,7 +38,6 @@ export class DecorationsOverlay extends DynamicViewOverlay {
 
 	public override onConfigurationChanged(e: viewEvents.ViewConfigurationChangedEvent): boolean {
 		const options = this._context.configuration.options;
-		this._lineHeight = options.get(EditorOption.lineHeight);
 		this._typicalHalfwidthCharacterWidth = options.get(EditorOption.fontInfo).typicalHalfwidthCharacterWidth;
 		return true;
 	}
@@ -116,7 +113,6 @@ export class DecorationsOverlay extends DynamicViewOverlay {
 	}
 
 	private _renderWholeLineDecorations(ctx: RenderingContext, decorations: ViewModelDecoration[], output: string[]): void {
-		const lineHeight = String(this._lineHeight);
 		const visibleStartLineNumber = ctx.visibleRange.startLineNumber;
 		const visibleEndLineNumber = ctx.visibleRange.endLineNumber;
 
@@ -130,9 +126,7 @@ export class DecorationsOverlay extends DynamicViewOverlay {
 			const decorationOutput = (
 				'<div class="cdr '
 				+ d.options.className
-				+ '" style="left:0;width:100%;height:'
-				+ lineHeight
-				+ 'px;"></div>'
+				+ '" style="left:0;width:100%;"></div>'
 			);
 
 			const startLineNumber = Math.max(d.range.startLineNumber, visibleStartLineNumber);
@@ -145,7 +139,6 @@ export class DecorationsOverlay extends DynamicViewOverlay {
 	}
 
 	private _renderNormalDecorations(ctx: RenderingContext, decorations: ViewModelDecoration[], output: string[]): void {
-		const lineHeight = String(this._lineHeight);
 		const visibleStartLineNumber = ctx.visibleRange.startLineNumber;
 
 		let prevClassName: string | null = null;
@@ -176,7 +169,7 @@ export class DecorationsOverlay extends DynamicViewOverlay {
 
 			// flush previous decoration
 			if (prevClassName !== null) {
-				this._renderNormalDecoration(ctx, prevRange!, prevClassName, prevShouldFillLineOnLineBreak, prevShowIfCollapsed, lineHeight, visibleStartLineNumber, output);
+				this._renderNormalDecoration(ctx, prevRange!, prevClassName, prevShouldFillLineOnLineBreak, prevShowIfCollapsed, visibleStartLineNumber, output);
 			}
 
 			prevClassName = className;
@@ -186,11 +179,11 @@ export class DecorationsOverlay extends DynamicViewOverlay {
 		}
 
 		if (prevClassName !== null) {
-			this._renderNormalDecoration(ctx, prevRange!, prevClassName, prevShouldFillLineOnLineBreak, prevShowIfCollapsed, lineHeight, visibleStartLineNumber, output);
+			this._renderNormalDecoration(ctx, prevRange!, prevClassName, prevShouldFillLineOnLineBreak, prevShowIfCollapsed, visibleStartLineNumber, output);
 		}
 	}
 
-	private _renderNormalDecoration(ctx: RenderingContext, range: Range, className: string, shouldFillLineOnLineBreak: boolean, showIfCollapsed: boolean, lineHeight: string, visibleStartLineNumber: number, output: string[]): void {
+	private _renderNormalDecoration(ctx: RenderingContext, range: Range, className: string, shouldFillLineOnLineBreak: boolean, showIfCollapsed: boolean, visibleStartLineNumber: number, output: string[]): void {
 		const linesVisibleRanges = ctx.linesVisibleRangesForRange(range, /*TODO@Alex*/className === 'findMatch');
 		if (!linesVisibleRanges) {
 			return;
@@ -222,12 +215,12 @@ export class DecorationsOverlay extends DynamicViewOverlay {
 					+ className
 					+ '" style="left:'
 					+ String(visibleRange.left)
+					+ 'px;width:'
 					+ (expandToLeft ?
-						'px;width:100%;height:' :
-						('px;width:' + String(visibleRange.width) + 'px;height:')
+						'100%;' :
+						(String(visibleRange.width) + 'px;')
 					)
-					+ lineHeight
-					+ 'px;"></div>'
+					+ '"></div>'
 				);
 				output[lineIndex] += decorationOutput;
 			}

src/vs/editor/browser/viewParts/indentGuides/indentGuides.css

@@ -6,4 +6,5 @@
 .monaco-editor .lines-content .core-guide {
 	position: absolute;
 	box-sizing: border-box;
+	height: 100%;
 }

src/vs/editor/browser/viewParts/indentGuides/indentGuides.ts

@@ -22,7 +22,6 @@ export class IndentGuidesOverlay extends DynamicViewOverlay {
 
 	private readonly _context: ViewContext;
 	private _primaryPosition: Position | null;
-	private _lineHeight: number;
 	private _spaceWidth: number;
 	private _renderResult: string[] | null;
 	private _maxIndentLeft: number;
@@ -37,7 +36,6 @@ export class IndentGuidesOverlay extends DynamicViewOverlay {
 		const wrappingInfo = options.get(EditorOption.wrappingInfo);
 		const fontInfo = options.get(EditorOption.fontInfo);
 
-		this._lineHeight = options.get(EditorOption.lineHeight);
 		this._spaceWidth = fontInfo.spaceWidth;
 		this._maxIndentLeft = wrappingInfo.wrappingColumn === -1 ? -1 : (wrappingInfo.wrappingColumn * fontInfo.typicalHalfwidthCharacterWidth);
 		this._bracketPairGuideOptions = options.get(EditorOption.guides);
@@ -60,7 +58,6 @@ export class IndentGuidesOverlay extends DynamicViewOverlay {
 		const wrappingInfo = options.get(EditorOption.wrappingInfo);
 		const fontInfo = options.get(EditorOption.fontInfo);
 
-		this._lineHeight = options.get(EditorOption.lineHeight);
 		this._spaceWidth = fontInfo.spaceWidth;
 		this._maxIndentLeft = wrappingInfo.wrappingColumn === -1 ? -1 : (wrappingInfo.wrappingColumn * fontInfo.typicalHalfwidthCharacterWidth);
 		this._bracketPairGuideOptions = options.get(EditorOption.guides);
@@ -114,7 +111,6 @@ export class IndentGuidesOverlay extends DynamicViewOverlay {
 		const visibleStartLineNumber = ctx.visibleRange.startLineNumber;
 		const visibleEndLineNumber = ctx.visibleRange.endLineNumber;
 		const scrollWidth = ctx.scrollWidth;
-		const lineHeight = this._lineHeight;
 
 		const activeCursorPosition = this._primaryPosition;
 
@@ -150,7 +146,7 @@ export class IndentGuidesOverlay extends DynamicViewOverlay {
 					)?.left ?? (left + this._spaceWidth)) - left
 					: this._spaceWidth;
 
-				result += `<div class="core-guide ${guide.className} ${className}" style="left:${left}px;height:${lineHeight}px;width:${width}px"></div>`;
+				result += `<div class="core-guide ${guide.className} ${className}" style="left:${left}px;width:${width}px"></div>`;
 			}
 			output[lineIndex] = result;
 		}

src/vs/editor/browser/viewParts/lineNumbers/lineNumbers.css

@@ -4,14 +4,14 @@
  *--------------------------------------------------------------------------------------------*/
 
 .monaco-editor .margin-view-overlays .line-numbers {
+	bottom: 0;
 	font-variant-numeric: tabular-nums;
 	position: absolute;
 	text-align: right;
 	display: inline-block;
 	vertical-align: middle;
 	box-sizing: border-box;
 	cursor: default;
-	height: 100%;
 }
 
 .monaco-editor .relative-current-line-number {

src/vs/editor/browser/viewParts/lines/viewLine.ts

@@ -151,7 +151,7 @@ export class ViewLine implements IVisibleLine {
 		return false;
 	}
 
-	public renderLine(lineNumber: number, deltaTop: number, viewportData: ViewportData, sb: StringBuilder): boolean {
+	public renderLine(lineNumber: number, deltaTop: number, lineHeight: number, viewportData: ViewportData, sb: StringBuilder): boolean {
 		if (this._isMaybeInvalid === false) {
 			// it appears that nothing relevant has changed
 			return false;
@@ -222,7 +222,7 @@ export class ViewLine implements IVisibleLine {
 		sb.appendString('<div style="top:');
 		sb.appendString(String(deltaTop));
 		sb.appendString('px;height:');
-		sb.appendString(String(this._options.lineHeight));
+		sb.appendString(String(lineHeight));
 		sb.appendString('px;" class="');
 		sb.appendString(ViewLine.CLASS_NAME);
 		sb.appendString('">');
@@ -255,10 +255,10 @@ export class ViewLine implements IVisibleLine {
 		return true;
 	}
 
-	public layoutLine(lineNumber: number, deltaTop: number): void {
+	public layoutLine(lineNumber: number, deltaTop: number, lineHeight: number): void {
 		if (this._renderedViewLine && this._renderedViewLine.domNode) {
 			this._renderedViewLine.domNode.setTop(deltaTop);
-			this._renderedViewLine.domNode.setHeight(this._options.lineHeight);
+			this._renderedViewLine.domNode.setHeight(lineHeight);
 		}
 	}
 

src/vs/editor/browser/viewParts/lines/viewLines.css

@@ -63,6 +63,11 @@
 	width: 100%;
 }
 
+.monaco-editor .view-line > span {
+	bottom: 0;
+	position: absolute;
+}
+
 .monaco-editor .mtkw {
 	color: var(--vscode-editorWhitespace-foreground) !important;
 }