Deferred indefinitely: UI Automation text pattern for screen readers

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Evaluación

Dificultad
5/5
Tiempo estimado
3-5 días
Aptitud para principiantes
10/100
Tipo de issue
Nueva funcionalidad
Claridad
Bien especificado
Estado de actividad
Estancado
Stack tecnológico
csharp
Área
accessibility, desktop

Línea de trabajo

The issue says work is deferred indefinitely and should resume only if the owner reopens it. If reopened, read the spike report at ~/work/gdr-design-20261102/reports/r6-uia-textpattern.md and inspect RichTextField's NativeControlHost approach; the spike code is at /mnt/h/spikes/uia-20261103/, both local to the author's machine. The described route was prototyped, but focus handoff, text and selection events, mouse pass-through, and the net10 apphost manifest remain risks.

Escrito por el modelo de indexación a partir del texto del issue.

Descripción

deferred

Narrator and NVDA read caret, selection, words and lines through UIA's text pattern (ITextProvider/ITextRangeProvider). Legacy FieldWorks never shipped one: Views is MSAA-only and its UIA provider is commented out (FWR-2874). So ADR 0017 sets the field's bar at FieldWorks' current level: name, role, value, state and bounds.

Deferred indefinitely by the owner, 2026-11-03.

What a spike found (2026-11-03)
  • Avalonia 11.3.17 and 12.1.2 have no text-pattern extension point. AutomationNode.GetPatternProvider is a fixed switch with no Text case. Upstream PRs #20890 and #21988 were closed unmerged.
  • Working route: RichTextField hosts an invisible child HWND through the public NativeControlHost. That window's WM_GETOBJECT returns our own providers. A spike proved DocumentRange.GetText, selection and word moves from an out-of-process UIA client on both versions.
  • Estimate: 2–3 weeks.
  • Risks:
    • the element can appear twice in the tree;
    • focus handoff to Narrator and NVDA, untested;
    • text and selection events;
    • mouse pass-through (HTTRANSPARENT);
    • the net10 apphost needs a supportedOS manifest.
  • Alternatives: patch Avalonia (3–4 weeks, two forked builds), or MSAA text, which gives too little.
  • Spike code and report: /mnt/h/spikes/uia-20261103/, ~/work/gdr-design-20261102/reports/r6-uia-textpattern.md (local to the author's machine).

Next: none until the owner reopens it.

🤖 Generated with Claude Code

Lenguaje dominante
C#
Estrellas
0
Forks
0
Merge medio
1 h 43 min
PR fusionados (30 d)
43

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