When the text is Chinese, the text_wrap parameter does not work. Because the words in Chinese are not separated by spaces.

[ligai322]

for example: I come from Beijing. But This sentence write in Chinese, like '我来自北京'.

[nvkelso]

We'll need to add special implementation logic for this, there are a few standards to reference.

[ligai322]

@nvkelso We can refer to the implementation of CSS, like word-wrap,word-break and text-wrap.

[nvkelso]

See also:

• https://en.wikipedia.org/wiki/Line_breaking_rules_in_East_Asian_languages
• Line breaking conventions can be found in JLREQ and JIS4051 for Japanese, ZHMARK for Chinese, and in UAX14 for all scripts in Unicode.
• [JIS4051] Formatting rules for Japanese documents (『日本語文書の組版方法』). Japanese Standards Association. 2004. JIS X 4051:2004. In Japanese
• [JLREQ] Yasuhiro Anan; et al. Requirements for Japanese Text Layout. 3 April 2012. W3C Working Group Note. URL: http://www.w3.org/TR/2012/NOTE-jlreq-20120403/
• [UAX14] Asmus Freytag. Line Breaking Properties. 17 January 2012. Unicode Standard Annex #14. URL: http://www.unicode.org/unicode/reports/tr14/
• [ZHMARK] 标点符号用法 (Punctuation Mark Usage). 1995. 中华人民共和国国家标准

[westnordost]

From Asian languages, this also at least applies to Thai, Lao and Burmese.

[hjanetzek]

It's possible that liblinebreak that we use requires the correct language to be specified. It worked before when we applied liblinebreak to individual script/language runs. This was changed a while ago to detect linebreaks without language set on the full string to first split on explicit line breaks.

[karimnaaji]

Fixed by https://github.com/tangrams/tangram-es/issues/1075.