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feat(rdp): text clipboard sharing in both directions

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A CLIPRDR channel with a text-only backend (CF_UNICODETEXT): text copied
on the remote desktop is fetched and goes through the app's remote-
clipboard preference like VNC and OSC 52; local text is offered to the
remote when the desktop gains focus, on Ctrl+V and with Paste Clipboard
(which no longer types the text). Backend callbacks run inside the
active stage, so they queue requests that the session loop sends.

Verified against xrdp: the remote X clipboard read back the offered
text, and a remote copy arrived through on_clipboard.
This commit is contained in:
Andy Dixon
2026-10-12 17:47:22 +01:00
parent 4256d45633
commit 6476ccff28
9 changed files with 152 additions and 21 deletions
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docs/user-manual.md
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@@ -173,7 +173,7 @@ Nexus Terminal logs on with Network Level Authentication (CredSSP, NTLM), so you
RDP servers usually present self-signed certificates, so the certificate is pinned like an SSH host key: its SHA-256 fingerprint is shown the first time and stored in **Known Hosts**, and a changed certificate offers Reject, Accept Once or Accept & Update. The check happens before any credentials are sent.
The viewer works like the VNC one: click the desktop to give it keyboard focus, **Ctrl+Alt+Del** sends the key combination, and **Paste Clipboard** types your clipboard's text into the remote desktop (clipboard sharing is not supported yet). With **Resize With Tab**, the remote desktop follows the tab's size on servers that support it (Windows); otherwise the picture is scaled.
The viewer works like the VNC one: click the desktop to give it keyboard focus, **Ctrl+Alt+Del** sends the key combination, and text is shared through the clipboard both ways: text you copy on the remote desktop arrives on your clipboard (subject to the remote-clipboard setting), and your clipboard is offered to the remote desktop whenever you click into it, press Ctrl+V or use **Paste Clipboard**. Files and images are not shared. With **Resize With Tab**, the remote desktop follows the tab's size on servers that support it (Windows); otherwise the picture is scaled.
### IRC