Line editing for chat messages breaks with the character "裔" #141

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opened 2025-10-14 15:40:22 -06:00 by navan · 0 comments

navan commented

2025-10-14 15:40:22 -06:00

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Originally created by @dstu on 2/22/2025

When entering a chat message (in INSERT mode), pasting a character like 裔 (a 3-byte character in UTF-8: https://codepoints.net/U+88d4) causes the text insertion point to be drawn incorrectly. When appending text, it is drawn over characters instead of at the end of the line. I suspect that this is the result of computing an offset incorrectly.

For correct behavior, see this image, which shows where the text insertion point is located after I type asdf asdf:

For incorrect behavior, see this image, which shows where the text insertion point is located after I type asdf裔asdf:

After typing this character and exiting from INSERT mode, it is no longer possible to position the insertion point at the end of the text that has been entered. Pressing [END] and then a (to append text to the end of the line) allows text to be appended properly, but the text insertion point is located in a confusing position (which makes it look like text is going to be inserted between characters, when it is actually going to be appended).

*Originally created by @dstu on 2/22/2025* When entering a chat message (in INSERT mode), pasting a character like `裔` (a 3-byte character in UTF-8: https://codepoints.net/U+88d4) causes the text insertion point to be drawn incorrectly. When appending text, it is drawn over characters instead of at the end of the line. I suspect that this is the result of computing an offset incorrectly. For correct behavior, see this image, which shows where the text insertion point is located after I type `asdf asdf`: ![Image](https://github.com/user-attachments/assets/4813daf8-295b-4690-9310-d091512c26af) For incorrect behavior, see this image, which shows where the text insertion point is located after I type `asdf裔asdf`: ![Image](https://github.com/user-attachments/assets/0cba4ae6-a096-4591-bb11-fadb46655fd2) After typing this character and exiting from INSERT mode, it is no longer possible to position the insertion point at the end of the text that has been entered. Pressing `[END]` and then `a` (to append text to the end of the line) allows text to be appended properly, but the text insertion point is located in a confusing position (which makes it look like text is going to be inserted between characters, when it is actually going to be appended).