Method transformDiagnostic

compiler/companion/src/Workspace.ts:285–323

(project: Project, original: ts.DiagnosticWithLocation | ts.Diagnostic)

  async emitFile(fileName: string): Promise<EmitResult> {
    return this.doEmitFile(fileName, undefined, undefined);
  }

  transformDiagnostic(project: Project, original: ts.DiagnosticWithLocation | ts.Diagnostic): Diagnostic {
    const text = project.formatDiagnostic(original);

    let category: string;
    switch (original.category) {
      case ts.DiagnosticCategory.Warning:
        category = 'warning';
        break;
      case ts.DiagnosticCategory.Error:
        category = 'error';
        break;
      case ts.DiagnosticCategory.Suggestion:
        category = 'suggestion';
        break;
      case ts.DiagnosticCategory.Message:
        category = 'message';
        break;
    }

    let file = original.file ?? (original.source && project.getOpenedSourceFile(original.source));

    let start: Location;
    let end: Location;
    if (file && original.start) {
      start = this.getLocationOfPositionInFile(file, original.start);
      end = this.getLocationOfPositionInFile(file, original.start + (original.length ?? 0));
    } else {
      start = { line: 0, offset: 0 };
      end = { line: 0, offset: 0 };
    }

    const transformed = {
      start,
      end,
      text,
      category,
    };
    return transformed;
  }