dotnet/wpf

Scancode not passed to TSF

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#11,635 创建于 2026年5月12日

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Good First Issue

描述

Description

The TextServiceManager does not pass scancode to Cicero/TSF

Reproduction Steps

https://github.com/dotnet/wpf/blob/7f005faa89e79b0b1fa1cb2c21283bab7916c092/src/Microsoft.DotNet.Wpf/src/PresentationCore/System/Windows/Input/TextServicesManager.cs#L232-L235

type anything using IME

Expected behavior

The scancode to be properly populated, e.g. from keyArgs.Scancode

Actual behavior

scancode seen in ITfKeyEventSink.On[Test]KeyDown is always 0

Regression?

no

Known Workarounds

reconstruct from virtual key

Impact

text services relying on scancodes do not work in WPF

Configuration

.NET 10/4.8, Windows 11, x64

Other information

No response

贡献者指南

技术栈
csharp
领域
desktop
议题类型
bug
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
half day
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
fresh
清晰度议题是否清楚说明期望改动、验收标准和下一步。
clear
前置要求
C#WPF
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
40
研究方向
Look at the TextServicesManager.cs file at line 232-235. The method needs to pass keyArgs.Scancode to the TSF sink. Investigate how other key arguments (like virtual key) are passed and replicate for scancode. Check the ITfKeyEventSink.OnTestKeyDown documentation to confirm the parameter. Implement the change and ensure it works with IME input.
Scancode not passed to TSF · dotnet/wpf#11635 | Good First Issue