[reportlab-users] Bug in Paragraph class with tags when switching frames

[Robin Becker]

Dinu Gherman wrote:

> Hi,

> 

> I've been testing a ReportLab extension for hyphenation written by

> Henning von Bargen. It seems a lot like we found a bug in Platypus

> paragraphs (without any extension added). Briefly, when using tags

> like "font" or "a" it can happen that adjacent words are combined

> into one new word, when the paragraph is split over two frames.

> 

> The attached two test cases show this using somewhat lengthy German

> words. test_para_in_frame1.pdf contains in the right frame the word

> "nurein" that should actually be the two words "nur ein". You can

> observe this for "font" and "a" tags, if you edit the code for

> test_para_in_frame1.py.

> 

> test_para_in_frame2.pdf is almost identical, but contains only the

> one right frame from test_para_in_frame2.pdf with only the piece

> of text to be expected there, i.e. without using any frame switch.

> In this case neither adding "font" nor "a" tags leads to the effect

> described above.

> 

> I suspect some word fragment calculation in Paragraph in combination

> with frame switching is buggy. It's definitly a nasty bug, since it

> is hard to accept for high quality output.

> 

> All this was tested on the latest release 2.1. I won't test this on

> the current code in SVN, since this is not an option for certain

> kind of clients. If it works on the SVN code I suggest building

> a new release 2.2, which is probably a good idea, anyway.

> 

> Regards,

> 

> Dinu

> 

......
thanks for the bug report. I suspect you're right. I'll take a look later.
-- 
Robin Becker