- From: Bobby Tung <bobbytung@wanderer.tw>
- Date: Thu, 5 Feb 2015 19:28:15 +0800
- To: "Martin J. Dürst" <duerst@it.aoyama.ac.jp>
- Cc: Koji Ishii <kojiishi@gmail.com>, Xidorn Quan <quanxunzhen@gmail.com>, Richard Ishida <ishida@w3.org>, www-style list <www-style@w3.org>, CJK discussion <public-i18n-cjk@w3.org>, eoconnor@apple.com
Hi Martin, We have tried to start a open source project, and already have a preliminary output here[1]. It works on Chrome canary[2], but still need to tune, such as the tone mark still occupied a full width space after bopomofo characters. the project plan is here in Chinese [3], I translate the requirement here: # related codepoints - Bopomofo characters: U+3105-U+3129 - U+02CA MODIFIER LETTER ACUTE ACCENT - U+02C7 CARON - U+02CB MODIFIER LETTER GRAVE ACCENT - U+02D9 DOT ABOVE # Rules When Bopomofo is aligned vertically, as inline or inter-character ruby. And U+02CA / U+02C7 / U+02CB is placed after U+3113 - U+3129 the tone mark should be placed as the reference [4] Additionally, if we decided the light tone be placed before Bopomofo Characters When U+02D9 is placed before U+3105 - U+3129 It's height should be compressed, or displayed by substitute glyph. I think it can be done by OpenType GPOS/GSUB feature, or by Layout Engine, same rules. [1]: OTF: https://www.dropbox.com/s/448adhcbgaudt4g/Bopomofo3DU.otf XHTML: https://www.dropbox.com/s/ld2ert8tr5hprzb/bopomofo_vert_gpos.xhtml [2]: https://www.dropbox.com/s/9eb5m63xzwlle59/Screenshot%202015-02-05%2003.21.45.png [3]: https://g0v.hackpad.com/OpenType-Font-bFFqBpPmcz0 [4]: https://www.dropbox.com/s/09yk4int5t1b5m8/mandarin_zhuyinfuhou_handbook.pdf > Martin J. Dürst <duerst@it.aoyama.ac.jp> 於 2015年2月5日 下午6:43 寫道： > > On 2015/02/04 00:13, Koji Ishii wrote: > >> 1. Do you want browsers to re-order the light tone marks, or do you >> think it should be done in the source HTML files? > > I personally think it should be done in a font. I'm sure it can be done in a font, similar to vowel reordering in South Asian scripts if there's no simpler solution. That would make it straightforward because all four tone marks would be handled the same. > > But of course I'll leave it to the experts who are closer to the use cases. > > >> 2. I recommend you to initiate an open source font project that >> handles positioning of second/third/forth tone marks. Fonts only with >> Bopomofo characters should not be too hard. > > As I say above, adding handling of the light tone mark should also be possible in a font. > > Regards, Martin. Bobby Tung W3C invited expert Chinese Layout Task Force Co-chair
Received on Thursday, 5 February 2015 11:28:51 UTC