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Type (#432): new type in a Japanese interface starts top-to-top with em box centre alignment

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As decided in #432 (option 2): while the interface is in Japanese, new type starts with em box
top-to-top leading and em box centre character alignment; other languages keep the Roman
baseline, so Latin area type doesn't move.

- The UI tells the engine the language it is drawn in each frame (`Session::ui_language`); without
  a UI, an explicit `interfaceLanguage` preference counts (`Session::japanese_interface`).
- `text.create` and `text.createInPath` (the Type tools' clicks and drags) apply it, and take
  `leadingModel` / `charAlign` to choose; the values used are journaled, so a replay does the same
  in any language.
- `paraStyle.new` / `charStyle.new` made from nothing (no `attrs`, no text selected) carry them.
- Imported text (PDF, SVG, DXF…) keeps the Roman baseline. Saved documents keep what they say.
- docs/mcp.md (New type in a Japanese interface) and the ROADMAP note it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
imachus
2026-10-09 00:08:03 +09:00
co-authored by Claude Opus 5.5
parent 99a5318fe4
commit fba610284c
9 changed files with 182 additions and 5 deletions
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docs/mcp.md
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@@ -2161,6 +2161,19 @@ undo step.
{"name":"run_command","arguments":{"command":"text.setFormat","params":{"burasagari":"forced"}}}
```
## New type in a Japanese interface
While the interface is in Japanese (VectorCraft › Language, or `auto` on a Japanese system), new type starts with em
box top-to-top leading (`leadingModel: "emBoxTop"`) and em box centre character alignment (`charAlign: "emBoxCenter"`);
in other languages it starts on the Roman baseline (#432). This covers the Type tools,
`text.create` and `text.createInPath`, which also take `leadingModel` and `charAlign` to choose, and `paraStyle.new` /
`charStyle.new` made with no `attrs` and no text selected. The values used are kept in the journal, so a replay sets the
same in any language. Saved documents keep what they say, and imported text (PDF, SVG, DXF…) keeps the Roman baseline.
```json
{"name":"run_command","arguments":{"command":"text.create","params":{"x":40,"y":60,"text":"雅楽","leadingModel":"emBoxTop","charAlign":"emBoxCenter"}}}
```
## Moving and flipping type on a path
Type on a path flows between a start and an end bracket, stored as fractions of its path's length.