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Type: Left and Right reach both sides of a character drawn with no width

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In type that holds right-to-left characters, Left and Right move the
caret through the visual caret stops (`caret_horizontal`). A cluster
drawn with no advance, such as a zero width non-joiner that the font
shapes as a glyph of its own, puts two stops at one x. A step kept the
stop with the lower byte, and the next step passed over the other one,
so the arrow keys never reached it. In Persian می‌خواهم laid out on
macOS, the caret could not be put between the non-joiner and خ with
the arrow keys.

Stops at one x are now visited one at a time in byte order. Going
right, the caret takes them in increasing order on left-to-right
glyphs and in decreasing order on right-to-left glyphs; going left,
it takes them in the reverse order. The end of a soft-wrapped line,
which the caret shows on the next line, is not one of those stops.
Where no two stops share an x, a step goes where it went before.
This commit is contained in:
dotCooCoo
2026-10-18 12:34:32 +07:00
committed by bflatastic
parent dd5d421a9c
commit bb7d6b487d
3 changed files with 99 additions and 11 deletions
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docs/type-parity.md
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@@ -42,7 +42,7 @@ against Illustrator's public documentation; **estimated** unless noted.
| Hidden characters (Show Hidden Characters) | done | `type.hiddenCharacters` |
| Spell check (Check Spelling, Auto Spell Check, custom dictionary) | missing | menu stubs; needs an openly licensed dictionary |
| Smart Punctuation, Change Case, Find & Replace | done | |
| Caret: the arrows and Delete step over whole clusters (Thai consonant with its marks, combining accents, emoji); Backspace removes one character | done | |
| Caret: the arrows and Delete step over whole clusters (Thai consonant with its marks, combining accents, emoji); Backspace removes one character | done | in text with right-to-left characters the arrows move in visual order and stop on both sides of a character drawn with no width, such as a zero width non-joiner |
| Touch Type tool | done | moves, scales and rotates one character through its kerning, baseline shift, scales and rotation (`text.touchType`); the first character of a line and right-to-left characters move only up and down |
| Retype (identify fonts in outlines/images) | missing | Illustrator's uses a cloud model |
| Snap to Glyph | missing | menu stub |