microsoft/Terminal

Korean IME: composing character still moves to wrong position on arrow key press (v1.24.11321.0)

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#20,244 创建于 2026年5月19日

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 (2 评论) (0 反应) (1 负责人)C++ (35,764 star) (3,212 fork)batch import
Area-RenderingHelp WantedIssue-BugPriority-3Product-Terminal

描述

Description

When composing a Korean (Hangul) character and pressing an arrow key before the composition is finalized, the composing character is inserted at the new cursor position instead of staying at the original position.

This was reportedly fixed in #20039 and #20041, but the issue still reproduces on v1.24.11321.0 (stable).

Steps to reproduce

  1. Open Windows Terminal (any shell: cmd, PowerShell, or WSL bash)
  2. Type Korean text, e.g. 가나 and begin composing the next character (e.g. ㄷ)
  3. Before finalizing the composition (without pressing Space/Enter), press an arrow key (← or →)
  4. The composing character (ㄷ) moves to the cursor's new position

Expected behavior

The composing character should be finalized at its original position before the cursor moves.

Actual behavior

The composing character follows the cursor and is inserted at the wrong position.

Environment

  • Windows Terminal: v1.24.11321.0 (stable)
  • Windows: 23H2
  • Shells tested: cmd, PowerShell 5.1, WSL2 bash
  • Microsoft IME (legacy mode)
  • conhost.exe does NOT have this issue — only Windows Terminal

贡献者指南

技术栈
cpp
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。
4
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。
1-2 days
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。
active
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++Windows Terminal architectureIME handling
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。
25
研究方向
Start by reviewing the previous fixes in #20039 and #20041 to understand what was changed and why the issue persists. Then, examine the input handling code in the Terminal codebase, likely in the `src/terminal/input/` directory, focusing on how IME composition events and keyboard input are processed. Look for where the composing character position is updated and why arrow keys trigger a move before finalization.