Support CSS Font module level 4 generic families for Chinese typography.

[bobbytung]

Hello,

I'm Bobby Tung, Editor of CLREQ.

In Chinese typography, we use several typefaces for typography. For example, 明體/宋體(Ming/Song) for serif, 黑體(Hey) for sans-serif, and also 楷體(Kai) and 仿宋(Fangsong). Kai is default typeface for official document in Taiwan, and Fangsong is used in PRC.

However, those typefaces are not matched to CSS generic family so well. Those document on web usually lists all system fonts to display as intended. Safari's restriction for local font has already broke some document's layout. And it is still hard to use web font without subsetting for Chinese fonts.

So please consider support new generic families in CSS Font module level 4 to provide a way to fulfill the requirements for Chinese typography on web and ebooks. As a parallel work to disable local font usage.

[bobbytung]

One more thing about display for Han character.

For example: CJK Unified Ideographs Extension G page on wikipedia. Only a few fonts such as "Hanazono Mincho" and "Jigmo font" cover wide range of Han characters in Unicode BMP / SIP / TIP.

Those fonts are missing function to cover the shortage of system fonts. What font mechanism browser may use, please consider to let user assign the fallback chain to display for their need.