Re #27083. Find in selection should work even if the selection is a single line.

src/vs/editor/contrib/find/findModel.ts

@@ -179,8 +179,12 @@ export class FindModelBoundToEditorModel {
 		}
 		if (findScope !== null) {
 			if (findScope.startLineNumber !== findScope.endLineNumber) {
-				// multiline find scope => expand to line starts / ends
-				findScope = new Range(findScope.startLineNumber, 1, findScope.endLineNumber, this._editor.getModel().getLineMaxColumn(findScope.endLineNumber));
+				if (findScope.endColumn === 1) {
+					findScope = new Range(findScope.startLineNumber, 1, findScope.endLineNumber - 1, this._editor.getModel().getLineMaxColumn(findScope.endLineNumber - 1));
+				} else {
+					// multiline find scope => expand to line starts / ends
+					findScope = new Range(findScope.startLineNumber, 1, findScope.endLineNumber, this._editor.getModel().getLineMaxColumn(findScope.endLineNumber));
+				}
 			}
 		}
 

src/vs/editor/contrib/find/findWidget.ts

@@ -610,7 +610,7 @@ export class FindWidget extends Widget implements IOverlayWidget, IHorizontalSas
 		if (this._toggleSelectionFind.checked) {
 			let selection = this._codeEditor.getSelection();
 			if (selection.endColumn === 1 && selection.endLineNumber > selection.startLineNumber) {
-				selection = selection.setEndPosition(selection.endLineNumber - 1, 1);
+				selection = selection.setEndPosition(selection.endLineNumber - 1, this._codeEditor.getModel().getLineMaxColumn(selection.endLineNumber - 1));
 			}
 			let currentMatch = this._state.currentMatch;
 			if (selection.startLineNumber !== selection.endLineNumber) {
@@ -806,7 +806,7 @@ export class FindWidget extends Widget implements IOverlayWidget, IHorizontalSas
 				if (this._toggleSelectionFind.checked) {
 					let selection = this._codeEditor.getSelection();
 					if (selection.endColumn === 1 && selection.endLineNumber > selection.startLineNumber) {
-						selection = selection.setEndPosition(selection.endLineNumber - 1, 1);
+						selection = selection.setEndPosition(selection.endLineNumber - 1, this._codeEditor.getModel().getLineMaxColumn(selection.endLineNumber - 1));
 					}
 					if (!selection.isEmpty()) {
 						this._state.change({ searchScope: selection }, true);

src/vs/editor/contrib/find/test/findModel.test.ts

@@ -2031,4 +2031,22 @@ suite('FindModel', () => {
 		findModel.dispose();
 		findState.dispose();
 	});
+
+	findTest('issue #27083. search scope works even if it is a single line', (editor, cursor) => {
+		let findState = new FindReplaceState();
+		findState.change({ searchString: 'hello', wholeWord: true, searchScope: new Range(7, 1, 8, 1) }, false);
+		let findModel = new FindModelBoundToEditorModel(editor, findState);
+
+		assertFindState(
+			editor,
+			[1, 1, 1, 1],
+			null,
+			[
+				[7, 14, 7, 19]
+			]
+		);
+
+		findModel.dispose();
+		findState.dispose();
+	});
 });