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Type: Character Alignment on the ICF top and bottom (ideographic character face)

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Character panel menu › Character Alignment gains ICF Top/Right and ICF Bottom/Left, and
`charAlign` takes `icfTop` / `icfBottom`: a character smaller than the largest on its line lines
up its ideographic character face's top (right, vertical) or bottom (left) with the big one's.

`FontFace::icf_margins` places the ICF inside the em box as the OpenType baseline tags define it
(https://learn.microsoft.com/en-us/typography/opentype/spec/baselinetags): `icfb` / `icft` of the
BASE table's horizontal and vertical axes against `ideo` / `idtp` (else the OS/2 typographic
descender and one em), for Han ideographs (else kana, else the first script). Without them, as that
page allows, the average ink box of some ideographs and kana; a face without ideographs uses its
em box.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
imachus
2026-10-09 08:14:17 +09:00
co-authored by Claude Opus 5.5
parent 8b81d58845
commit 4411688b3d
19 changed files with 195 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files
crates/engine/src/cmd/textedit.rs
+10 -3
View File
@@ -27,7 +27,7 @@ pub fn specs() -> Vec<CommandSpec> {
"Character",
[],
None,
"{id, start?: byte, end?: byte (default: all text), font?, style?, size?: pt, leading?: pt|\"auto\", tracking?, kerning?: 1/1000 em|\"auto\", baselineShift?: pt, hScale?: %, vScale?: %, rotation?: deg, fill?: colour|\"none\", stroke?: colour|\"none\", strokeWidth?: pt, strokeOptions?: {weight?, cap?, join?, miterLimit?, dash?, dashOffset?, alignDashes?} (as stroke.set: the character stroke), underline?, strikethrough?, allCaps?: bool, smallCaps?: bool, position?: \"normal\"|\"superscript\"|\"subscript\" (sizes from Document Setup), features?: [\"dlig\", \"-liga\", …], charAlign?: \"romanBaseline\"|\"emBoxTop\"|\"emBoxCenter\"|\"emBoxBottom\"} style a character range (runs are split at the range ends) → {id, runs}",
"{id, start?: byte, end?: byte (default: all text), font?, style?, size?: pt, leading?: pt|\"auto\", tracking?, kerning?: 1/1000 em|\"auto\", baselineShift?: pt, hScale?: %, vScale?: %, rotation?: deg, fill?: colour|\"none\", stroke?: colour|\"none\", strokeWidth?: pt, strokeOptions?: {weight?, cap?, join?, miterLimit?, dash?, dashOffset?, alignDashes?} (as stroke.set: the character stroke), underline?, strikethrough?, allCaps?: bool, smallCaps?: bool, position?: \"normal\"|\"superscript\"|\"subscript\" (sizes from Document Setup), features?: [\"dlig\", \"-liga\", …], charAlign?: \"romanBaseline\"|\"emBoxTop\"|\"emBoxCenter\"|\"emBoxBottom\"|\"icfTop\"|\"icfBottom\"} style a character range (runs are split at the range ends) → {id, runs}",
has_doc,
set_range_style
),
@@ -198,7 +198,7 @@ pub(crate) fn features_param(p: &Value, cmd: &str) -> Result<Option<Vec<String>>
Ok(Some(vectorcraft_text::OtFeatures::default().with_tags(tags).to_tags()))
}
/// `charAlign: "romanBaseline"|"emBoxTop"|"emBoxCenter"|"emBoxBottom"` (Character Alignment).
/// `charAlign: "romanBaseline"|"emBoxTop"|"emBoxCenter"|"emBoxBottom"|"icfTop"|"icfBottom"` (Character Alignment).
pub(crate) fn char_align_param(p: &Value, cmd: &str) -> Result<Option<vectorcraft_doc::CharAlign>> {
use vectorcraft_doc::CharAlign;
let Some(v) = p.get("charAlign").filter(|v| !v.is_null()) else { return Ok(None) };
@@ -207,7 +207,14 @@ pub(crate) fn char_align_param(p: &Value, cmd: &str) -> Result<Option<vectorcraf
Some("emBoxTop") => CharAlign::EmBoxTop,
Some("emBoxCenter") => CharAlign::EmBoxCenter,
Some("emBoxBottom") => CharAlign::EmBoxBottom,
_ => return Err(bad(cmd, "`charAlign` must be \"romanBaseline\", \"emBoxTop\", \"emBoxCenter\" or \"emBoxBottom\"")),
Some("icfTop") => CharAlign::IcfTop,
Some("icfBottom") => CharAlign::IcfBottom,
_ => {
return Err(bad(
cmd,
"`charAlign` must be \"romanBaseline\", \"emBoxTop\", \"emBoxCenter\", \"emBoxBottom\", \"icfTop\" or \"icfBottom\"",
));
}
}))
}