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Support isolated live window ScreenCast streams

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Render selected toplevels through a private portal-only capture protocol, preserve logical snapshot geometry, and renegotiate PipeWire video on window resizing. Bound outstanding snapshots and retry temporary contention; stop on source closure and session locking.

Validation: portal unit tests (31), capture budget unit, private-bus portal contracts, and real nested/PipeWire isolation, workspace, resize, close and paused-lock tests pass. Independent review cleared. Monitor restore integration timed out on both this build and the unchanged previous compositor under the current nested host.
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Samuel Onoja committed 2026-09-30 04:02:33 +01:00
1 parent 56a888adb3
commit baca852ee9
26 files changed
+1307 -139
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scripts/tests/test_portal_contracts.py
+3 -1
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@@ -112,11 +112,13 @@ def private_bus_checks():
assert request_name == 1
version, = call("org.freedesktop.DBus.Properties", "Get", GLib.Variant("(ss)", ("org.freedesktop.impl.portal.ScreenCast", "version")), "(v)")
assert version == 4
source_types, = call("org.freedesktop.DBus.Properties", "Get", GLib.Variant("(ss)", ("org.freedesktop.impl.portal.ScreenCast", "AvailableSourceTypes")), "(v)")
assert source_types == 3
for mode in (0, 1, 2):
session = PATH + f"/session/test/persist{mode}"
handle = PATH + f"/request/test/persist{mode}"
assert call("org.freedesktop.impl.portal.ScreenCast", "CreateSession", GLib.Variant("(oosa{sv})", (handle, session, "org.test.Share", {})), "(ua{sv})") == (0, {})
options = {"persist_mode": GLib.Variant("u", mode), "restore_data": GLib.Variant("(suv)", ("Other", 9, GLib.Variant("s", "foreign data")))}
options = {"types": GLib.Variant("u", (1, 2, 3)[mode]), "persist_mode": GLib.Variant("u", mode), "restore_data": GLib.Variant("(suv)", ("Other", 9, GLib.Variant("s", "foreign data")))}
assert call("org.freedesktop.impl.portal.ScreenCast", "SelectSources", GLib.Variant("(oosa{sv})", (handle, session, "org.test.Share", options)), "(ua{sv})") == (0, {})
bus.call_sync(NAME, session, "org.freedesktop.impl.portal.Session", "Close", None, None, Gio.DBusCallFlags.NONE, 5000, None)
session = PATH + "/session/test/badpersist"