中点のベタ組

• Rapporteur: tanukihee
• Propriétaire: (Aucun)
• Type: Demande de soutien
• État: Ouvert
• Composant: (Aucun)
• Jalon: (Aucun)
• Priorité: 5 - moyen
• Sévérité: 5 - moyen
• Résolution: Aucun
• Fichier: 2

Détails Répondre

「JIS X 4051:2004 では，行末の句読点や中点はベタ」だと、jfm-ujis.lua にはこう説明しました。ですが、JIS のベタ組の中点は前に四分アキとして、後ろはベタ（図 https://www.w3.org/TR/jlreq/ja/Images-ja/img2_1_2.png にご参照）で、中国語には違います。

中国語のベタ組は、中点の前後もベタです（つまりなかてんのぜんごに挿入したグルーは同じです）。こういう時にはどうやって調整できますか？

中文：

JIS 中行末的中间标点密排是前方加四分空后方密排（也即前后的间距可以不同），而中文中的中间标点的密排是前后都密排（也即需要同时调整，中点前后的胶应该相同（不同的时候需要取小值？）），请问这种情况怎么写 jfm.lua 呢？

Ticket History (3/6 Histories)

2020-05-26 13:58 Updated by: tanukihee

• New Ticket "中点のベタ組" created

2020-05-27 05:50 Updated by: h7k

• File tate.png (File ID: 5636) is attached

2020-05-27 06:38 Updated by: h7k

Commentaire Répondre

It would be better to create JFMs for Chinese typesetting. LuaTeX-ja has jfm-{quanjiao,banjiao,CCT,kaiming}.lua by MaQiYuan. Perhaps you could use them in horizontal direction, but there are no vertical counterpart.

---

In tate.png (which is attached), I've written several situations.

• (a1), (a2): U+FF65 (Halfwidth Katakana Middle dot), halfwidth
• (b1), (b2): U+30FB (Katakana Middle dot), halfwidth + quarterwidth space*2
• (c1), (c2): U+00B7(Middle dot), ALchar, xkanjiskip space*2

1. So, it is not difficult to typeset "in halfwidth always, as (a1) and (a2)"; one can use U+FF65. Furthremore, one can use "overwrite" U+30FB by

    \catcode"30FB=\active \let ・=･

   (Note that jfm-min.lua, which is used in ltj[t]article, ltj[t]book, ltj[t]report classes, does not have informations for halfwidth katakana.)
2. Perhaps even simpler sotution is to use foillowing \HWMD (but I'm not tested)

    \def\HWMD{\leavevmode\hbox to .5\zw{\hss\ltjjachar"30FB\hss}}
    % \catcode"30FB=\active \let ・=\HWMD

3. But it is not easy to typeset middle dots in the following way:
   • In the middle of a line, there is a quarter space before/after (as (b1))
   • At the end of a line, there is no space before (as (a1))

Perhaps it may be possible with some Lua callback, but I have no time to do that soon.

2020-05-27 12:08 Updated by: tanukihee

Commentaire Répondre

3. の効果がほしいですが、ちょっと難しいですか、ではしばらくやめましょう。

.tex ファイルには \kern などの命令が調整できますが、一々したら面倒な仕事になりますね。

どうもありがとうございます。

2020-05-31 08:42 Updated by: h7k

• File mdtest.tar.gz (File ID: 5642) is attached

2020-05-31 08:59 Updated by: h7k

Commentaire Répondre

3. の効果がほしいですが、ちょっと難しいですか、ではしばらくやめましょう。

I made a test (mdtest.tar.gz), but it only covers simplest cases. The approach is the following:

• A glue before “・” is not inserted before linkbreaking, so the (simplified) list at there would like

   (glyph 漢)→(glyph ・)→(penalty)→(glue 0.5\zw)→(glyph 字)
  

• If a linebreak occurs just after “・”, nothing happens.
• If a linebreakdoes not occur just after “・”, the 0.5\zw glue after “・” is separated, as

  (glyph 漢)→(glue 0.25\zw)→(glyph ・)→(penalty)→(glue 0.25\zw)→(glyph 字)
  

Note that this approach does not work well when a paragraph/horizontal box begins or ends with “・”.