A hint on a Source is a pure presentation style

fixes #28938

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

@@ -51,7 +51,7 @@ export class DebugContentProvider implements IWorkbenchContribution, ITextModelC
 
 			return model;
 		}, (err: DebugProtocol.ErrorResponse) => {
-			this.debugService.deemphasizeSource(resource);
+			this.debugService.sourceIsNotAvailable(resource);
 			const modePromise = this.modeService.getOrCreateMode(MIME_TEXT);
 			const model = this.modelService.createModel(err.message, modePromise, resource);
 

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

@@ -539,9 +539,9 @@ export interface IDebugService {
 	stopProcess(process: IProcess): TPromise<any>;
 
 	/**
-	 * Deemphasizes all sources with the passed uri. Source will appear as grayed out in callstack view.
+	 * Makes unavailable all sources with the passed uri. Source will appear as grayed out in callstack view.
 	 */
-	deemphasizeSource(uri: uri): void;
+	sourceIsNotAvailable(uri: uri): void;
 
 	/**
 	 * Gets the current debug model.

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

@@ -1054,10 +1054,10 @@ export class Model implements IModel {
 		this._onDidChangeWatchExpressions.fire();
 	}
 
-	public deemphasizeSource(uri: uri): void {
+	public sourceIsNotAvailable(uri: uri): void {
 		this.processes.forEach(p => {
 			if (p.sources.has(uri.toString())) {
-				p.sources.get(uri.toString()).presentationHint = 'deemphasize';
+				p.sources.get(uri.toString()).available = false;
 			}
 		});
 		this._onDidChangeCallStack.fire();

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

@@ -12,12 +12,14 @@ const UNKNOWN_SOURCE_LABEL = nls.localize('unknownSource', "Unknown Source");
 export class Source {
 
 	public uri: uri;
+	public available: boolean;
 
 	constructor(public raw: DebugProtocol.Source, public presentationHint: string) {
 		if (!raw) {
 			this.raw = { name: UNKNOWN_SOURCE_LABEL };
 		}
 		const path = this.raw.path || this.raw.name;
+		this.available = this.raw.name !== UNKNOWN_SOURCE_LABEL;
 		this.uri = this.raw.sourceReference > 0 ? uri.parse(`${DEBUG_SCHEME}:${path}`) : uri.file(path);
 	}
 
@@ -33,10 +35,6 @@ export class Source {
 		return this.raw.sourceReference;
 	}
 
-	public get available() {
-		return this.raw.name !== UNKNOWN_SOURCE_LABEL && this.presentationHint !== 'deemphasize';
-	}
-
 	public get inMemory() {
 		return this.uri.toString().indexOf(`${DEBUG_SCHEME}:`) === 0;
 	}

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

@@ -894,8 +894,8 @@ export class DebugService implements debug.IDebugService {
 		});
 	}
 
-	public deemphasizeSource(uri: uri): void {
-		this.model.deemphasizeSource(uri);
+	public sourceIsNotAvailable(uri: uri): void {
+		this.model.sourceIsNotAvailable(uri);
 	}
 
 	public restartProcess(process: debug.IProcess, restartData?: any): TPromise<any> {

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

@@ -97,7 +97,7 @@ export class MockDebugService implements debug.IDebugService {
 
 	public logToRepl(value: string): void { }
 
-	public deemphasizeSource(uri: uri): void { }
+	public sourceIsNotAvailable(uri: uri): void { }
 }
 
 export class MockSession implements debug.ISession {