Timothy Flynn 0e4fb9ae73 LibWeb: Ensure up/down arrow navigation is grapheme-aware ...

Previously, it was possible for an up/down arrow press to place the
cursor in the middle of a multi-code point grapheme cluster. We want to
prevent this in a way that matches the behavior of other browsers.

Both Chrome and Firefox will map the starting position to a visually
equivalent position in the target line with harfbuzz and ICU segmenters.
The need for this is explained in a code comment. The result is a much
more natural feeling of text navigation.

2025-08-18 13:17:28 +02:00

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