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punktfunk/crates/pf-clipboard/src
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feat(clipboard): Linux + Windows host clipboard backends as the pf-clipboard crate (Phase 1 host + Phase 3)
The host half of the shared clipboard (design/clipboard-and-file-transfer.md §4),
ported from feat/shared-clipboard (6bd8c18b) into the post-W6 crate shape: the
backends land as a pf-clipboard subsystem crate (the pf-inject/pf-capture
pattern) instead of growing punktfunk-host back out, and the ~340-line
punktfunk1.rs integration is re-implemented against the native.rs/control.rs
split that replaced it.

pf-clipboard:
- host::wayland — ext-data-control-v1 (KWin / wlroots / Sway / Hyprland).
- host::mutter — GNOME via Mutter's *direct* org.gnome.Mutter.RemoteDesktop
  clipboard (no data-control at any GNOME version; the xdg portal needs an
  interactive grant a headless host can't answer).
- host::windows + host::winfmt — Win32 clipboard on a hidden message-loop
  window: WM_CLIPBOARDUPDATE listener + OLE delayed rendering (WM_RENDERFORMAT)
  for text / CF_HTML / RTF / PNG.
- host::session — the backend-agnostic coordinator bridging HostClipboard to
  the QUIC clipboard plane (offers, fetch accept-loop, remote offers, pastes).
- A portable facade (policy / enabled / cap_advertised / ClipCoordCmd / start /
  spawn_decline_loop) so the orchestrator compiles cfg-free on every platform;
  ClipCoordCmd moves into the crate (it was host-owned before).

punktfunk-host glue:
- handshake.rs advertises HOST_CAP_CLIPBOARD via pf_clipboard::cap_advertised.
- serve_session starts the coordinator (gated on a real compositor — the
  synthetic source stays out of the session clipboard) and spawns the
  CLIP_FETCH_UNAVAILABLE decline loop when the policy is on but no backend bound.
- control.rs gains the ClipControl/ClipOffer arms + the host-offer forward
  branch, and the e2e session test (cap advertise → ClipState ack with
  BACKEND_UNAVAILABLE → fetch decline) rides in native.rs's tests.

Still opt-in default OFF (PUNKTFUNK_CLIPBOARD). Remaining: the macOS client
(design §5) — then this becomes user-visible.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-17 13:02:20 +02:00
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