Provides a clean abstraction over ext-data-control and wlr-data-control protocols using enum variants and macros to eliminate code duplication. Implements Manager, Device, Source, and Offer types that work with both protocol implementations through a unified interface. Demonstrates advanced Rust skills in creating zero-cost abstractions over similar but incompatible C APIs.

Contains the is_text() function that determines if a MIME type represents plain text content. Goes beyond simple 'text/' prefix checking to include common script and markup types (JSON, XML, YAML, CSV, INI) and special types like TEXT, STRING, UTF8_STRING. Based on reference implementation from wl-clipboard, showing careful consideration of real-world MIME type usage patterns.

Handles the shared Wayland connection logic including socket connection, global registry retrieval, seat binding, and initial setup. Encapsulates the boilerplate required to establish a Wayland client connection and prepare for protocol interactions. Cleanly separates connection concerns from protocol-specific clipboard logic, making it reusable across different Wayland client applications.