Optical Margin Alignment and Roman Hanging Punctuation left every
right-to-left paragraph of point and area type, and type on a path
whose first paragraph runs right to left, as it was: the quotation
marks, full stops and commas at the ends of its lines stayed inside
the margins.
A right-to-left line now hangs at the margins its alignment places it
against, as a left-to-right line does. Auto aligns a right-to-left
line at its right, so it hangs there. The line is read from right to
left: where it hangs at its left margin, a full stop and the quotation
mark after it that end the line hang together. In vertical type,
where the characters of a right-to-left paragraph run from the top
down, the pair is read from the top.
Type on a path whose first paragraph runs right to left hangs at its
brackets by the same rule. In horizontal type, Auto places it at the
end bracket, so it hangs there. On a closed path, its hang at the end
bracket gets the space between the end and start brackets before its
hang at the start bracket does, as in right-aligned type.
A justified right-to-left line of one word is spread between its
letters as they are drawn. The gap after each letter went to the
letter that follows it in the text, so the two leftmost letters
touched and the word ended one gap short of the right margin.
Docs: docs/mcp.md, docs/type-parity.md, docs/target-app-parity.md.
The reference app justifies Arabic text with kashidas, set per paragraph
with the Paragraph panel's Insert Kashidas list (None, Short, Medium,
Long, Stylistic). VectorCraft had no kashidas, so a justified Arabic
line was spaced out at its word spaces like a Latin one.
The Paragraph panel, with the Indic options shown, now has Insert
Kashidas. On a justified horizontal area type line that is shorter
than its measure, each Arabic word with joined letters gets one kashida
between its last pair of them, drawn as tatweels (U+0640) in the font
of the letter after it. The kashidas share the line's room equally,
each at most a quarter of an em (Short), half an em (Medium) or an em
(Long); a Stylistic kashida is a row of the font's own tatweels, up to
an em. The word spaces take the room the kashidas leave, so the line
keeps its width, and line breaks do not change. The letter after a
kashida advances over it, so the caret before that letter, a selection
of it and a click on it take the kashida in. None, the default, leaves
lines as they were.
In horizontal type that is not on a path, the caret in a letter drawn
with several glyphs (a letter with a vowel mark) is now placed by the
whole letter, as hit testing already measured it, instead of by its
first glyph.
text.setFormat takes kashida. The setting is saved with the paragraph
only when it is not None, paragraph styles carry it, and Reset Panel
sets it back to None.
Docs: docs/mcp.md, docs/target-app-parity.md.
The Paragraph panel menu's Justification… was a disabled stub, and justified
lines stretched word spaces between fixed limits (80% to 150%).
Each paragraph now has Justification options: Word Spacing, Letter Spacing
and Glyph Scaling (Minimum, Desired, Maximum, in percent), Auto Leading and
Single Word Justification. Desired applies to every line; a justified line
fills its measure with word spacing first, then letter spacing, then glyph
scaling, each within its range, and past them its word spaces take the
rest. The Every-line Composer scores lines by that flexibility. Auto
Leading sets the leading of characters whose leading is Auto. A justified
line holding one word is spread between its letters (Full Justify) or
aligned left, centre or right.
The defaults are the documented ones (80/100/133, 0/0/0, 100/100/100, 120,
Full Justify), saved only when they differ. Because the default maximum
word spacing is 133%, justified paragraphs break differently than before;
the Every-line Composer's second pass is now unbounded for justified text
(it used to give up past four times the stretch and fall back to the
Single-line Composer, which the narrower default range would make common),
and lines that can't stretch at all are still refused.
text.setFormat takes wordSpacing, letterSpacing, glyphScaling ([min,
desired, max] or {min?, desired?, max?}), autoLeading and
singleWordJustification; Minimum ≤ Desired ≤ Maximum must hold or nothing
changes. Paragraph styles carry the options (New and Redefine capture
them), and Reset Panel resets them. Justification… opens a dialog
(ui.justification) with Preview; OK is disabled while a row is out of
order. Live SVG text places characters the options move, and a glyph that
Glyph Scaling scales is stretched to its width; PDF uses the glyphs'
transforms. Vertical type isn't glyph scaled; type on a path doesn't use
the options.
Docs: docs/mcp.md, docs/type-parity.md, docs/gaps.md.
Closes#2755.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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