Status: IN
The Lexi document editor case study identifies seven design problems: document structure, formatting, UI embellishment, multiple look-and-feels, multiple window systems, user operations (undo), and spelling/hyphenation. The source explicitly applies Composite to document structure and Strategy to formatting, foreshadows Decorator for UI embellishment and Abstract Factory for multiple look-and-feels, and lists the remaining three problems without mapping them to specific patterns.
Source: entries/2026/06/17/gof-oo-chunk-4.md