Fixes #45146

src/vs/editor/contrib/snippet/snippetController2.ts

@@ -14,6 +14,7 @@ import { KeyCode, KeyMod } from 'vs/base/common/keyCodes';
 import { showSimpleSuggestions } from 'vs/editor/contrib/suggest/suggest';
 import { ISuggestion } from 'vs/editor/common/modes';
 import { Selection } from 'vs/editor/common/core/selection';
+import { Range } from 'vs/editor/common/core/range';
 import { Choice } from 'vs/editor/contrib/snippet/snippetParser';
 import { repeat } from 'vs/base/common/strings';
 import { ICodeEditor } from 'vs/editor/browser/editorBrowser';
@@ -203,6 +204,13 @@ export class SnippetController2 implements IEditorContribution {
 		this._session.next();
 		this._updateState();
 	}
+
+	getSessionEnclosingRange(): Range {
+		if (this._session) {
+			return this._session.getEnclosingRange();
+		}
+		return undefined;
+	}
 }
 
 

src/vs/editor/contrib/snippet/snippetSession.ts

@@ -226,6 +226,20 @@ export class OneSnippet {
 			this._placeholderGroups = groupBy(this._snippet.placeholders, Placeholder.compareByIndex);
 		});
 	}
+
+	public getEnclosingRange(): Range {
+		let result: Range;
+		const model = this._editor.getModel();
+		this._placeholderDecorations.forEach((decorationId) => {
+			const placeholderRange = model.getDecorationRange(decorationId);
+			if (!result) {
+				result = placeholderRange;
+			} else {
+				result = result.plusRange(placeholderRange);
+			}
+		});
+		return result;
+	}
 }
 
 export class SnippetSession {
@@ -510,4 +524,17 @@ export class SnippetSession {
 		// have any left, we don't have a selection anymore
 		return allPossibleSelections.size > 0;
 	}
+
+	public getEnclosingRange(): Range {
+		let result: Range;
+		for (const snippet of this._snippets) {
+			const snippetRange = snippet.getEnclosingRange();
+			if (!result) {
+				result = snippetRange;
+			} else {
+				result = result.plusRange(snippetRange);
+			}
+		}
+		return result;
+	}
 }

src/vs/workbench/api/electron-browser/mainThreadSaveParticipant.ts

@@ -29,6 +29,7 @@ import { localize } from 'vs/nls';
 import { isFalsyOrEmpty } from 'vs/base/common/arrays';
 import { ILogService } from 'vs/platform/log/common/log';
 import { shouldSynchronizeModel } from 'vs/editor/common/services/modelService';
+import { SnippetController2 } from 'vs/editor/contrib/snippet/snippetController2';
 
 export interface ISaveParticipantParticipant extends ISaveParticipant {
 	// progressMessage: string;
@@ -60,6 +61,12 @@ class TrimWhitespaceParticipant implements ISaveParticipantParticipant {
 			prevSelection = editor.getSelections();
 			if (isAutoSaved) {
 				cursors.push(...prevSelection.map(s => new Position(s.positionLineNumber, s.positionColumn)));
+				const snippetsRange = SnippetController2.get(editor).getSessionEnclosingRange();
+				if (snippetsRange) {
+					for (let lineNumber = snippetsRange.startLineNumber; lineNumber <= snippetsRange.endLineNumber; lineNumber++) {
+						cursors.push(new Position(lineNumber, model.getLineMaxColumn(lineNumber)));
+					}
+				}
 			}
 		}