Timothy Flynn 8a94c7a7f7 LibGUI: Skip over grapheme clusters on left/right arrow key presses ...

Currently, if you use the left/right arrow keys to move over a multi-
code point glyph, we will move through that glyph one code point at a
time. This means you can "pause" your movement in the middle of a glyph
and delete a subsection of a grapheme cluster. This now moves the cursor
across the entire cluster.

Visually, we will need to separately track physical and virtual cursor
positions. That is, when you move across a multi-code point glyph, the
visual cursor should only move one position at a time, while a physical
cursor stores the "real" position in terms of number of code points.

This also converts a couple of ints to auto - these are actually size_t,
and are being passed to functions that expect size_t, so let's not cast
them to ints.

2023-02-18 16:54:46 +01:00

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