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fix(linux): map virtual touch and pen devices to streamed outputs - #221
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Keep fixture state private behind explicit controls and isolate optional touchscreen assignment from contact emission to satisfy the remaining Sonar findings.
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## master #221 +/- ##
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+ Coverage 73.17% 73.32% +0.15%
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Files 44 45 +1
Lines 9810 9865 +55
Branches 3651 3692 +41
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+ Hits 7178 7234 +56
- Misses 2026 2197 +171
+ Partials 606 434 -172
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... and 10 files with indirect coverage changes Continue to review full report in Codecov by Harness.
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Description
Linux compositors can keep virtual touchscreens and pen tablets assigned to the default monitor even when the application streams another display. Add an optional
PointerViewport::output_namehint and map the library-owned event node to that connector through KWin's session D-Bus API. Pen assignment also disables workspace-wide mapping.Only confirmed assignments are cached. Unavailable capability probes are retried on later events, device-registration races receive bounded retries, and failed assignments stop input submission. GIO support is optional; other compositors retain their existing mapping. Plasma 6.5.1 or later is recommended for reliable output reassignment.
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Issues Fixed or Closed
Roadmap Issues
Testing
Validated locally on Linux in a Fedora container:
cmake --build cmake-build-linux-input-monitor --target test_libvirtualhid cmake-build-linux-input-monitor/tests/test_libvirtualhid --gtest_filter='-LinuxConsumerTest.*:LinuxRuntimeTest.LinuxUhidSmokeTestRequiresPrerequisites:LinuxRuntimeTest.LinuxUinputSmokeTestRequiresPrerequisites'The container lacks
/dev/uinput,/dev/uhid, and a real KDE session. The 21 installed-device tests were excluded; physical multi-monitor touch/pen behavior remains unverified.Current-head validation: all 13 portable D-Bus mapping tests passed natively, including a new unavailable-then-available KWin capability regression that failed before the cache fix. The mapping helper reached 100% line, function, and branch coverage. The GIO-disabled source syntax check and strict Dockle/Doxygen 1.18.0 documentation build passed (167 themed HTML pages); Read the Docs build 35685315 also passed for
86da2c2. The macOS library/examples build passed after the Sonar refactor. Linux uinput cases on the latest changes await hosted CI; the earlier 161-test Linux run is recorded above.Type of Change
Checklist
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Codex assisted with investigation, implementation, regression tests, documentation, and this PR description.