clean up from https://github.com/Microsoft/vscode/pull/13925

src/vs/base/parts/quickopen/browser/quickOpenWidget.ts

@@ -171,7 +171,7 @@ export class QuickOpenWidget implements IModelProvider {
 
 						const focus = this.tree.getFocus();
 						if (focus) {
-							this.elementSelected(focus, keyboardEvent);
+							this.elementSelected(focus, keyboardEvent, keyboardEvent.keyCode === KeyCode.RightArrow ? Mode.OPEN_IN_BACKGROUND : Mode.OPEN);
 						}
 					}
 
@@ -401,23 +401,14 @@ export class QuickOpenWidget implements IModelProvider {
 		this.model.runner.run(value, Mode.PREVIEW, context);
 	}
 
-	private elementSelected(value: any, event?: any): void {
+	private elementSelected(value: any, event?: any, preferredMode?: Mode): void {
 		let hide = true;
 
 		// Trigger open of element on selection
 		if (this.isVisible()) {
-			let eventForContext = event;
-			let mode = Mode.OPEN;
+			let mode = preferredMode || Mode.OPEN;
 
-			if (event instanceof StandardKeyboardEvent) {
-				eventForContext = event.browserEvent;
-
-				if (event.keyCode === KeyCode.RightArrow) {
-					mode = Mode.OPEN_IN_BACKGROUND;
-				}
-			}
-
-			const context: IEntryRunContext = { event: eventForContext, keymods: this.extractKeyMods(eventForContext), quickNavigateConfiguration: this.quickNavigateConfiguration };
+			const context: IEntryRunContext = { event, keymods: this.extractKeyMods(event), quickNavigateConfiguration: this.quickNavigateConfiguration };
 
 			hide = this.model.runner.run(value, mode, context);
 		}

src/vs/workbench/browser/quickopen.ts

@@ -18,7 +18,7 @@ import { KeyMod } from 'vs/base/common/keyCodes';
 import { Mode, IEntryRunContext, IAutoFocus, IModel, IQuickNavigateConfiguration } from 'vs/base/parts/quickopen/common/quickOpen';
 import { QuickOpenEntry, IHighlight, QuickOpenEntryGroup, QuickOpenModel } from 'vs/base/parts/quickopen/browser/quickOpenModel';
 import { EditorOptions, EditorInput } from 'vs/workbench/common/editor';
-import { IResourceInput, IEditorInput } from 'vs/platform/editor/common/editor';
+import { IResourceInput, IEditorInput, IEditorOptions } from 'vs/platform/editor/common/editor';
 import { IWorkbenchEditorService } from 'vs/workbench/services/editor/common/editorService';
 import { IQuickOpenService } from 'vs/workbench/services/quickopen/common/quickOpenService';
 import { AsyncDescriptor } from 'vs/platform/instantiation/common/descriptors';
@@ -244,34 +244,38 @@ export class EditorQuickOpenEntry extends QuickOpenEntry implements IEditorQuick
 	}
 
 	public getOptions(): EditorOptions {
-		return EditorOptions.create({});
+		return null;
 	}
 
 	public run(mode: Mode, context: IEntryRunContext): boolean {
-		const hideWidget = mode === Mode.OPEN;
+		const hideWidget = (mode === Mode.OPEN);
 
 		if (mode === Mode.OPEN || mode === Mode.OPEN_IN_BACKGROUND) {
 			let sideBySide = context.keymods.indexOf(KeyMod.CtrlCmd) >= 0;
-			let opts = this.getOptions();
 
-			let backgroundOpts;
+			let openInBackgroundOptions: IEditorOptions;
 			if (mode === Mode.OPEN_IN_BACKGROUND) {
-				backgroundOpts = { pinned: true, preserveFocus: true };
-				opts.mixin(backgroundOpts);
+				openInBackgroundOptions = { pinned: true, preserveFocus: true };
 			}
 
 			let input = this.getInput();
 			if (input instanceof EditorInput) {
+				let opts = this.getOptions();
+				if (opts) {
+					opts.mixin(openInBackgroundOptions);
+				} else if (openInBackgroundOptions) {
+					opts = EditorOptions.create(openInBackgroundOptions);
+				}
+
 				this.editorService.openEditor(input, opts, sideBySide).done(null, errors.onUnexpectedError);
-			}
-			else {
-				if (backgroundOpts) {
-					(<IResourceInput>input).options = objects.assign(
-						(<IResourceInput>input).options || {},
-						backgroundOpts
-					);
+			} else {
+				const resourceInput = <IResourceInput>input;
+
+				if (openInBackgroundOptions) {
+					resourceInput.options = objects.assign(resourceInput.options || Object.create(null), openInBackgroundOptions);
 				}
-				this.editorService.openEditor(<IResourceInput>input, sideBySide).done(null, errors.onUnexpectedError);
+
+				this.editorService.openEditor(resourceInput, sideBySide).done(null, errors.onUnexpectedError);
 			}
 		}
 
@@ -431,4 +435,4 @@ export class QuickOpenAction extends Action {
 
 		return TPromise.as(null);
 	}
-}
+}
\ No newline at end of file

src/vs/workbench/common/editor.ts

@@ -454,12 +454,15 @@ export class EditorOptions implements IEditorOptions {
 	/**
 	 * Inherit all options from other EditorOptions instance.
 	 */
-	public mixin(other: EditorOptions): void {
-		this.preserveFocus = other.preserveFocus;
-		this.forceOpen = other.forceOpen;
-		this.revealIfVisible = other.revealIfVisible;
-		this.pinned = other.pinned;
-		this.index = other.index;
+	public mixin(other: IEditorOptions): void {
+		if (other) {
+			this.preserveFocus = other.preserveFocus;
+			this.forceOpen = other.forceOpen;
+			this.revealIfVisible = other.revealIfVisible;
+			this.pinned = other.pinned;
+			this.index = other.index;
+			this.inactive = other.inactive;
+		}
 	}
 
 	/**