debug: show origin in editor header

fixes #18148

src/vs/workbench/parts/debug/browser/debugActions.ts

@@ -717,15 +717,7 @@ export class FocusProcessAction extends AbstractDebugAction {
 		return this.debugService.focusStackFrameAndEvaluate(null, process).then(() => {
 			const stackFrame = this.debugService.getViewModel().focusedStackFrame;
 			if (stackFrame) {
-				return this.editorService.openEditor({
-					resource: stackFrame.source.uri,
-					options: {
-						preserveFocus: true,
-						selection: { startLineNumber: stackFrame.lineNumber, startColumn: 1 },
-						revealIfVisible: true,
-						revealInCenterIfOutsideViewport: true
-					}
-				});
+				return stackFrame.openInEditor(this.editorService, true);
 			}
 		});
 	}

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

@@ -14,6 +14,7 @@ import { ISuggestion } from 'vs/editor/common/modes';
 import { Source } from 'vs/workbench/parts/debug/common/debugSource';
 import { Range } from 'vs/editor/common/core/range';
 import { RawContextKey, ContextKeyExpr } from 'vs/platform/contextkey/common/contextkey';
+import { IWorkbenchEditorService } from 'vs/workbench/services/editor/common/editorService';
 
 export const VIEWLET_ID = 'workbench.view.debug';
 export const REPL_ID = 'workbench.panel.repl';
@@ -170,6 +171,7 @@ export interface IStackFrame extends ITreeElement {
 	getScopes(): TPromise<IScope[]>;
 	restart(): TPromise<any>;
 	toString(): string;
+	openInEditor(editorService: IWorkbenchEditorService, preserveFocus?: boolean, sideBySide?: boolean): TPromise<any>;
 }
 
 export interface IEnablement extends ITreeElement {

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

@@ -19,6 +19,7 @@ import { ISuggestion } from 'vs/editor/common/modes';
 import { Position } from 'vs/editor/common/core/position';
 import * as debug from 'vs/workbench/parts/debug/common/debug';
 import { Source } from 'vs/workbench/parts/debug/common/debugSource';
+import { IWorkbenchEditorService } from 'vs/workbench/services/editor/common/editorService';
 
 const MAX_REPL_LENGTH = 10000;
 const UNKNOWN_SOURCE_LABEL = nls.localize('unknownSource', "Unknown Source");
@@ -351,6 +352,19 @@ export class StackFrame implements debug.IStackFrame {
 	public toString(): string {
 		return `${this.name} (${this.source.inMemory ? this.source.name : this.source.uri.fsPath}:${this.lineNumber})`;
 	}
+
+	public openInEditor(editorService: IWorkbenchEditorService, preserveFocus?: boolean, sideBySide?: boolean): TPromise<any> {
+		return editorService.openEditor({
+			resource: this.source.uri,
+			description: this.source.origin,
+			options: {
+				preserveFocus,
+				selection: { startLineNumber: this.lineNumber, startColumn: 1 },
+				revealIfVisible: true,
+				revealInCenterIfOutsideViewport: true
+			}
+		}, sideBySide);
+	}
 }
 
 export class Thread implements debug.IThread {

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

@@ -283,14 +283,7 @@ export class DebugService implements debug.IDebugService {
 							this.windowService.getWindow().focus();
 							aria.alert(nls.localize('debuggingPaused', "Debugging paused, reason {0}, {1} {2}", event.body.reason, stackFrameToFocus.source ? stackFrameToFocus.source.name : '', stackFrameToFocus.lineNumber));
 
-							return this.editorService.openEditor({
-								resource: stackFrameToFocus.source.uri,
-								options: {
-									selection: { startLineNumber: stackFrameToFocus.lineNumber, startColumn: 1 },
-									revealIfVisible: true,
-									revealInCenterIfOutsideViewport: true
-								}
-							});
+							return stackFrameToFocus.openInEditor(this.editorService);
 						}
 					});
 				}

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

@@ -309,15 +309,7 @@ export class CallStackController extends BaseDebugController {
 	private focusStackFrame(stackFrame: debug.IStackFrame, event: IKeyboardEvent | IMouseEvent, preserveFocus: boolean): void {
 		this.debugService.focusStackFrameAndEvaluate(stackFrame).then(() => {
 			const sideBySide = (event && (event.ctrlKey || event.metaKey));
-			return this.editorService.openEditor({
-				resource: stackFrame.source.uri,
-				options: {
-					preserveFocus,
-					selection: { startLineNumber: stackFrame.lineNumber, startColumn: 1 },
-					revealIfVisible: true,
-					revealInCenterIfOutsideViewport: true
-				},
-			}, sideBySide);
+			return stackFrame.openInEditor(this.editorService, preserveFocus, sideBySide);
 		}, errors.onUnexpectedError);
 	}
 }