enable live preview for last line of document. for that... (#181029)

- support `ordinal` and `showInHiddenAreas` for `IViewZone`
- adopt in zoneWidget
- adopt for inline chat widgets
- remove code that isn't needed anymore 👯‍♂️

fixes microsoft/vscode-internalbacklog#4024

src/vs/editor/browser/editorBrowser.ts

@@ -38,11 +38,19 @@ export interface IViewZone {
 	 * This is relevant for wrapped lines.
 	 */
 	afterColumn?: number;
-
 	/**
 	 * If the `afterColumn` has multiple view columns, the affinity specifies which one to use. Defaults to `none`.
 	*/
 	afterColumnAffinity?: PositionAffinity;
+	/**
+	 * Render the zone even when its line is hidden.
+	 */
+	showInHiddenAreas?: boolean;
+	/**
+	 * Tiebreaker that is used when multiple view zones want to be after the same line.
+	 * Defaults to `afterColumn` otherwise 10000;
+	 */
+	ordinal?: number;
 	/**
 	 * Suppress mouse down events.
 	 * If set, the editor will attach a mouse down listener to the view zone and .preventDefault on it.

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

@@ -137,12 +137,7 @@ export class ViewZones extends ViewPart {
 	// ---- end view event handlers
 
 	private _getZoneOrdinal(zone: IViewZone): number {
-
-		if (typeof zone.afterColumn !== 'undefined') {
-			return zone.afterColumn;
-		}
-
-		return 10000;
+		return zone.ordinal ?? zone.afterColumn ?? 10000;
 	}
 
 	private _computeWhitespaceProps(zone: IViewZone): IComputedViewZoneProps {
@@ -187,7 +182,7 @@ export class ViewZones extends ViewPart {
 		}
 
 		const viewPosition = this._context.viewModel.coordinatesConverter.convertModelPositionToViewPosition(zoneAfterModelPosition, zone.afterColumnAffinity);
-		const isVisible = this._context.viewModel.coordinatesConverter.modelPositionIsVisible(zoneBeforeModelPosition);
+		const isVisible = zone.showInHiddenAreas || this._context.viewModel.coordinatesConverter.modelPositionIsVisible(zoneBeforeModelPosition);
 		return {
 			isInHiddenArea: !isVisible,
 			afterViewLineNumber: viewPosition.lineNumber,

src/vs/editor/contrib/zoneWidget/browser/zoneWidget.ts

@@ -28,6 +28,9 @@ export interface IOptions {
 	frameColor?: Color;
 	arrowColor?: Color;
 	keepEditorSelection?: boolean;
+
+	ordinal?: number;
+	showInHiddenAreas?: boolean;
 }
 
 export interface IStyles {
@@ -48,25 +51,31 @@ const defaultOptions: IOptions = {
 
 const WIDGET_ID = 'vs.editor.contrib.zoneWidget';
 
-export class ViewZoneDelegate implements IViewZone {
+class ViewZoneDelegate implements IViewZone {
 
 	domNode: HTMLElement;
 	id: string = ''; // A valid zone id should be greater than 0
 	afterLineNumber: number;
 	afterColumn: number;
 	heightInLines: number;
+	readonly showInHiddenAreas: boolean | undefined;
+	readonly ordinal: number | undefined;
 
 	private readonly _onDomNodeTop: (top: number) => void;
 	private readonly _onComputedHeight: (height: number) => void;
 
 	constructor(domNode: HTMLElement, afterLineNumber: number, afterColumn: number, heightInLines: number,
 		onDomNodeTop: (top: number) => void,
-		onComputedHeight: (height: number) => void
+		onComputedHeight: (height: number) => void,
+		showInHiddenAreas: boolean | undefined,
+		ordinal: number | undefined
 	) {
 		this.domNode = domNode;
 		this.afterLineNumber = afterLineNumber;
 		this.afterColumn = afterColumn;
 		this.heightInLines = heightInLines;
+		this.showInHiddenAreas = showInHiddenAreas;
+		this.ordinal = ordinal;
 		this._onDomNodeTop = onDomNodeTop;
 		this._onComputedHeight = onComputedHeight;
 	}
@@ -388,7 +397,9 @@ export abstract class ZoneWidget implements IHorizontalSashLayoutProvider {
 				position.column,
 				heightInLines,
 				(top: number) => this._onViewZoneTop(top),
-				(height: number) => this._onViewZoneHeight(height)
+				(height: number) => this._onViewZoneHeight(height),
+				this.options.showInHiddenAreas,
+				this.options.ordinal
 			);
 			this._viewZone.id = accessor.addZone(this._viewZone);
 			this._overlayWidget = new OverlayWidgetDelegate(WIDGET_ID + this._viewZone.id, this.domNode);

src/vs/monaco.d.ts

@@ -5045,6 +5045,15 @@ declare namespace monaco.editor {
 		 * If the `afterColumn` has multiple view columns, the affinity specifies which one to use. Defaults to `none`.
 		*/
 		afterColumnAffinity?: PositionAffinity;
+		/**
+		 * Render the zone even when its line is hidden.
+		 */
+		showInHiddenAreas?: boolean;
+		/**
+		 * Tiebreaker that is used when multiple view zones want to be after the same line.
+		 * Defaults to `afterColumn` otherwise 10000;
+		 */
+		ordinal?: number;
 		/**
 		 * Suppress mouse down events.
 		 * If set, the editor will attach a mouse down listener to the view zone and .preventDefault on it.

src/vs/workbench/contrib/interactiveEditor/browser/interactiveEditorController.ts

@@ -487,13 +487,7 @@ export class InteractiveEditorController implements IEditorContribution {
 			const inputPromise = this._zone.getInput(wholeRange.getEndPosition(), placeholder, value, this._ctsRequest.token);
 
 			if (textModel0Changes && editMode === EditMode.LivePreview) {
-				const diffPosition = diffZone.getEndPositionForChanges(wholeRange, textModel0Changes);
-				if (diffPosition) {
-					const newInputPosition = diffPosition.delta(0, 1);
-					if (wholeRange.getEndPosition().isBefore(newInputPosition)) {
-						this._zone.updatePosition(newInputPosition);
-					}
-				}
+
 				diffZone.showDiff(
 					() => wholeRangeDecoration.getRange(0)!, // TODO@jrieken if it can be null it will be null
 					textModel0Changes

src/vs/workbench/contrib/interactiveEditor/browser/interactiveEditorDiffWidget.ts

@@ -41,7 +41,7 @@ export class InteractiveEditorDiffWidget extends ZoneWidget {
 		@IThemeService themeService: IThemeService,
 		@ILogService private readonly _logService: ILogService,
 	) {
-		super(editor, { showArrow: false, showFrame: false, isResizeable: false, isAccessible: true });
+		super(editor, { showArrow: false, showFrame: false, isResizeable: false, isAccessible: true, showInHiddenAreas: true, ordinal: 10000 + 1 });
 		super.create();
 
 		const diffContributions = EditorExtensionsRegistry
@@ -102,14 +102,6 @@ export class InteractiveEditorDiffWidget extends ZoneWidget {
 		throw new Error('not supported like this');
 	}
 
-	getEndPositionForChanges(range: Range, changes: LineRangeMapping[]): Position | undefined {
-		assertType(this.editor.hasModel());
-
-		const modified = this.editor.getModel();
-		const ranges = this._computeHiddenRanges(modified, range, changes);
-		return ranges?.anchor;
-	}
-
 	showDiff(range: () => Range, changes: LineRangeMapping[]): void {
 		assertType(this.editor.hasModel());
 		this._sessionStore.clear();
@@ -197,7 +189,7 @@ export class InteractiveEditorDiffWidget extends ZoneWidget {
 		lineRanges = lineRanges.filter(range => !range.isEmpty);
 		if (lineRanges.length === 0) {
 			// todo?
-			this._logService.debug(`[IE] diff NOTHING to hide for ${String(editor.getModel()?.uri)}`);
+			this._logService.debug(`[IE] diff NOTHING to hide for ${editor.getId()} with ${String(editor.getModel()?.uri)}`);
 		} else {
 			const ranges = lineRanges.map(r => new Range(r.startLineNumber, 1, r.endLineNumberExclusive - 1, 1));
 			editor.setHiddenAreas(ranges, InteractiveEditorDiffWidget._hideId);

src/vs/workbench/contrib/interactiveEditor/browser/interactiveEditorWidget.ts

@@ -499,7 +499,7 @@ export class InteractiveEditorZoneWidget extends ZoneWidget {
 		@IInstantiationService private readonly _instaService: IInstantiationService,
 		@IContextKeyService contextKeyService: IContextKeyService,
 	) {
-		super(editor, { showFrame: false, showArrow: false, isAccessible: true, className: 'interactive-editor-widget', keepEditorSelection: true });
+		super(editor, { showFrame: false, showArrow: false, isAccessible: true, className: 'interactive-editor-widget', keepEditorSelection: true, showInHiddenAreas: true, ordinal: 10000 + 3 });
 
 		this._ctxVisible = CTX_INTERACTIVE_EDITOR_VISIBLE.bindTo(contextKeyService);
 		this._ctxCursorPosition = CTX_INTERACTIVE_EDITOR_OUTER_CURSOR_POSITION.bindTo(contextKeyService);