Re: [jlreq] Come up with a definition of 全角 that are generic enough to cover non-square typefaces (#380)

The agreement so far is to use the width of U+3000 FULLWIDTH SPACE. This encompasses its use on typefaces that has different advance width between Kanji and Kana, such as Window's MS P Mincho/Gothic and AXIS Condensed. With these examples the width of the FULLWIDTH SPACE is narrower than width of Kanji. In case of AXIS Condensed it matches with the width of Kana, and in case of MS P fonts where Kana is proportional the width is again closer to width of Kana. Using FULLWIDTH SPACE allows typeface designers to specify the width of Zenkaku independently from the width of Kanji.

As FULLWIDTH SPACE is used to indent paragraphs and for some other spacing purposes, most likely the width of this character reflects the designer's intention for the width of Zenkaku used for the particular typeface.

With that said, the term "Zenkaku" is used in many places / ways in describing layout, and the actual width required might be different in each case when the typeface has different advance width between Kanji and Kana. Further research would be necessary to re-define Zenkaku and make the layout description more generic.

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Received on Saturday, 4 November 2023 03:26:31 UTC