[reportlab-users] MediaWiki's "Download as PDF" feature uses ReportLab but has a problem

Andy Robinson andy at reportlab.com
Tue Jan 10 12:10:57 EST 2012

On 10 January 2012 16:59, Yao Ziyuan <yaoziyuan at gmail.com> wrote:

> I'm not familiar with Python. But I have a simple way for ReportLab to

> process CJK line-wrapping transparently:


> Before everything, for every CJK character found in the text, insert a

> U+200B ("zero-width space") after it. This will logically make every

> CJK character a possible line-wrapping point.


> Then, recognize U+200B as a kind of whitespace in ReportLab's non-CJK

> line-wrapping code.


That's clever! Thank you for this. I'll trust you that this works for
Chinese, which unfortunately I don't speak/read/write.

For Japanese, which I do know quite well, NOT every character is a
good wrap point, and there are quite sophisticated rules about
characters which should not begin or end a line. Our present
algorithm is really a "Japanese wrapping", not "CJK".

The right answer is still probably a unicode-based algorithm for all
languages. I wish I had more time to work on it.

- Andy

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