Method findTypeDeclaration

scripts/docs/lib/source.ts:226–255

* Finds the absolute declaration file path of a type if imported.

(typeName: string)

   * Finds the absolute declaration file path of a type if imported.
   */
  findTypeDeclaration(typeName: string): string | null {
    for (const statement of this.sourceFile.statements) {
      if (ts.isImportDeclaration(statement) && statement.importClause) {
        const namedBindings = statement.importClause.namedBindings;
        if (namedBindings && ts.isNamedImports(namedBindings)) {
          const imports = namedBindings.elements.filter(
            (element) => element.name.text === typeName,
          );
          if (imports.length > 0) {
            const moduleSpecifier = (
              statement.moduleSpecifier as ts.StringLiteral
            ).text;
            // Resolve the path relative to the directory of the current source file
            let resolvedPath = resolve(
              dirname(this.sourceFile.fileName),
              moduleSpecifier,
            );

            if (existsSync(resolvedPath + ".ts")) {
              return resolvedPath + ".ts";
            } else if (existsSync(resolvedPath + ".tsx")) {
              return resolvedPath + ".tsx";
            }
            return null;
          }
        }
      }
    }
    return null;
  }

  /**
   * Get the public method definitions of a class.