Thai, Lao, Khmer and Burmese are written without spaces between words.
Tools that know the words insert U+200B ZERO WIDTH SPACE so lines can
break between them, and line breaking already treats it as a space. But
justification counted every space-class char as a gap, so a justified
paragraph got extra room at every U+200B: visible gaps between all its
words, which is not how these scripts are justified.
Item::stretches() (a space other than U+200B) is used for the justify
gap count, the trailing width and the pen advance. Line breaking is
unchanged. Test: on a justified line of words joined by U+200B and one
real space, the extra room goes to the real space only; with no real
space the line is laid out as if left-aligned.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Found while testing crates/text/src/layout.rs:1070 (shape_segment calls TextCase::apply_after one char at a time; crates/doc/src/text.rs:124 apply_after)
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
`caret` put the index right after a line break (a newline, or a line
separator) at the end of the line above, so after Enter the caret showed
on the previous line until something was typed, and Up/Down counted
lines from there. The index before the break stays at the end of its
line; the one after it is now on the next line, as after a wrap.
Selection highlights already started such lines at their own start
(#665); their comment no longer describes the old caret.
On lines with right-to-left runs, Left and Right now move the caret one
position left or right on screen (TextLayout::visual_step) instead of one
char in logical order, so the caret no longer jumps backwards inside
Arabic or Hebrew. At a line's edge it continues to the neighbouring line
in reading order. Plain left-to-right lines are unchanged.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Text runs get bidi embedding levels from the Unicode bidi algorithm
(unicode-bidi, MIT/Apache-2.0). Right-to-left runs are shaped right to
left, kept in logical order for line breaking and placed in visual order
per line (rule L2, trailing spaces at the paragraph level). Glyphs and
lines know their direction, so the caret, clicks and selection
highlights follow right-to-left runs. Text without right-to-left
characters skips the analysis.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
- Inline IME composition: egui Preedit events become a composition held in the text edit
session (`TextEdit.preedit`), shown inline at the caret with an underline and the IME cursor,
reflowing the text; the document only gets the committed text (`text.edit.insert`). Composing
over a selection replaces it; moving the caret or ending the edit drops an uncommitted
composition. The IME candidate window follows the cursor inside the composition.
New command `text.edit.preedit {text, cursor?}`; `text.edit.selection` reports it.
- Variable fonts: faces read their fvar axes (tag, name, range, default, hidden) and named
instances. Named instances are offered as styles and resolve in `find`; a style name with no
instance implies weight/italic/slant on the axes and optical size follows the font size.
Per-run custom axis values (`TextStyle.variations`, serde default, omitted when empty) are applied
in HarfRust shaping (ShaperInstance) and skrifa outlines/advances (cached per coordinates).
PDF export outlines non-default instances instead of embedding the default one.
- Commands/props: `fontVariations` / `variationSettings` props (whole layer or start..end),
`text.setVariations {variations, replace?}` (merges; edited range while editing),
`text.fonts {family, style?, axes: true}`; `node.get` and copy/paste properties carry the axes.
Picking a named style (Bold/Italic toggles, weight steps, fontStyle/fontWeight) drops custom
wght/ital/slnt values and keeps the others.
- Type settings ▸ Variable tab for variable fonts: a slider (default tick, double-click to reset)
and a field per visible axis, "Mixed" across differing styles, live drag as one undo step,
"Reset to style". Long style/family names stay on one line with an ellipsis and a tooltip.
- Tests: variable font shaping/outlines/clamping/instances (skipped without a variable font),
serde backward compatibility, preedit lifecycle and undo, variation commands/props/undo/junk;
junk sweeps extended with variation and preedit params.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
