https://bugs.kde.org/show_bug.cgi?id=523645
Bug ID: 523645
Summary: Provide a privacy-bounded, read-only external KWin
layout-telemetry D-Bus API
Classification: Plasma
Product: kwin
Version First unspecified
Reported In:
Platform: Other
OS: Linux
Status: REPORTED
Severity: wishlist
Priority: NOR
Component: wayland-generic
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Feature request: provide a privacy-bounded, read-only external KWin API for
narrow
window-layout observation.
External same-user session clients need a maintained API to obtain an initial
snapshot
of ordinary application windows and receive lifecycle, focus, output/desktop,
tile,
non-content state, and settled-geometry changes. This would support local
accessibility, workflow, and layout tools without requiring compositor scripts,
effects, or plugins.
The current public interface exposes desktop/output state and interactive
one-window
inspection, but not a general external window list or event stream. A narrow
maintained
API would provide a safer integration boundary.
Requested data:
- opaque per-session window token;
- desktop-file application ID;
- output and desktop identifiers;
- frame/tile geometry and tile assignment;
- minimized, maximized, fullscreen, keep-above, and focus state;
- event sequence and monotonic timing.
Geometry should be emitted only after an interaction settles or a debounce
expires.
The API must never expose titles/captions, window text, document names or
paths,
browser URLs/history/tabs/content, PIDs or command lines, notifications,
clipboard,
input, screenshots/OCR, accessibility text, media, passwords, credentials, or
any
control/mutation operation. It should be read-only, session-local, with no
built-in
storage or network transport.
An illustrative interface, org.kde.KWin.LayoutTelemetry1, would provide
GetSnapshot(),
WindowAdded, WindowRemoved, and deduplicated WindowChanged events. A KWin
restart
creates a new session epoch. Implementation should test field exclusion,
reconnect/
snapshot behavior, window removal, duplicate suppression, and geometry
debounce.
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