debug: only automatically reveal repl on debug session start

fixes #2467

src/vs/workbench/parts/debug/common/debug.ts

@@ -267,7 +267,7 @@ export interface IDebugService extends ee.IEventEmitter {
 	getViewModel(): IViewModel;
 
 	openOrRevealEditor(source: Source, lineNumber: number, preserveFocus: boolean, sideBySide: boolean): TPromise<any>;
-	revealRepl(inBackground?:boolean): TPromise<void>;
+	revealRepl(focus?: boolean): TPromise<void>;
 }
 
 // utils

src/vs/workbench/parts/debug/electron-browser/debugService.ts

@@ -219,9 +219,6 @@ export class DebugService extends ee.EventEmitter implements debug.IDebugService
 			if (simpleVals.length) {
 				this.logToRepl(simpleVals.join(' '), sev);
 			}
-
-			// show repl
-			this.revealRepl(true /* in background */).done(null, errors.onUnexpectedError);
 		}
 	}
 
@@ -316,7 +313,6 @@ export class DebugService extends ee.EventEmitter implements debug.IDebugService
 	private onOutput(event: DebugProtocol.OutputEvent): void {
 		const outputSeverity = event.body.category === 'stderr' ? severity.Error : event.body.category === 'console' ? severity.Warning : severity.Info;
 		this.appendReplOutput(event.body.output, outputSeverity);
-		this.revealRepl(true /* in background */).done(null, errors.onUnexpectedError);
 	}
 
 	private getThreadData(threadId: number): TPromise<void> {
@@ -564,6 +560,7 @@ export class DebugService extends ee.EventEmitter implements debug.IDebugService
 				glyphMargin: true
 			});
 			this.inDebugMode.set(true);
+			this.revealRepl(false).done(undefined, errors.onUnexpectedError);
 
 			this.telemetryService.publicLog('debugSessionStart', { type: configuration.type, breakpointCount: this.model.getBreakpoints().length, exceptionBreakpoints: this.model.getExceptionBreakpoints() });
 		}).then(undefined, (error: Error) => {
@@ -754,10 +751,10 @@ export class DebugService extends ee.EventEmitter implements debug.IDebugService
 		return this.editorService.openEditor(editorInput, wbeditorcommon.TextEditorOptions.create({ preserveFocus: true }), sideBySide);
 	}
 
-	public revealRepl(inBackground: boolean = false): TPromise<void> {
-		return this.panelService.openPanel(debug.REPL_ID, !inBackground).then((repl: Repl) => {
+	public revealRepl(focus = true): TPromise<void> {
+		return this.panelService.openPanel(debug.REPL_ID, focus).then((repl: Repl) => {
 			const elements = this.model.getReplElements();
-			if (!inBackground && elements.length > 0) {
+			if (elements.length > 0) {
 				return repl.reveal(elements[elements.length - 1]);
 			}
 		});