untitled - add a method to set the value without making document dirty

Author: bpasero

src/vs/workbench/common/editor/untitledTextEditorModel.ts

@@ -61,6 +61,8 @@ export class UntitledTextEditorModel extends BaseTextEditorModel implements IUnt
 	}
 
 	private dirty = false;
+	private ignoreDirtyOnModelContentChange = false;
+
 	private versionId = 0;
 	private configuredEncoding: string | undefined;
 
@@ -130,6 +132,18 @@ export class UntitledTextEditorModel extends BaseTextEditorModel implements IUnt
 		}
 	}
 
+	setValue(value: string, ignoreDirty?: boolean): void {
+		if (ignoreDirty) {
+			this.ignoreDirtyOnModelContentChange = true;
+		}
+
+		try {
+			this.updateTextEditorModel(createTextBufferFactory(value));
+		} finally {
+			this.ignoreDirtyOnModelContentChange = false;
+		}
+	}
+
 	isReadonly(): boolean {
 		return false;
 	}
@@ -218,15 +232,17 @@ export class UntitledTextEditorModel extends BaseTextEditorModel implements IUnt
 	private onModelContentChanged(model: ITextModel, e: IModelContentChangedEvent): void {
 		this.versionId++;
 
-		// mark the untitled text editor as non-dirty once its content becomes empty and we do
-		// not have an associated path set. we never want dirty indicator in that case.
-		if (!this.hasAssociatedFilePath && model.getLineCount() === 1 && model.getLineContent(1) === '') {
-			this.setDirty(false);
-		}
+		if (!this.ignoreDirtyOnModelContentChange) {
+			// mark the untitled text editor as non-dirty once its content becomes empty and we do
+			// not have an associated path set. we never want dirty indicator in that case.
+			if (!this.hasAssociatedFilePath && model.getLineCount() === 1 && model.getLineContent(1) === '') {
+				this.setDirty(false);
+			}
 
-		// turn dirty otherwise
-		else {
-			this.setDirty(true);
+			// turn dirty otherwise
+			else {
+				this.setDirty(true);
+			}
 		}
 
 		// Check for name change if first line changed in the range of 0-FIRST_LINE_NAME_MAX_LENGTH columns