Btukfyl

I'm struggling with hyphenation of long URLs (using tag url{}).

Line breaking works fine in cases when URL is just part of line which doesn't fit to text area width. That means URL is hyphenated correctly if line starts with some text before URL - or if hyphenated URL is followed by other text which is also hyphenated.

Problem is in parts of URL which are at the line alone

1) first line of very long URL

2) middle lines of very long hyphenated URL

At screenshot there is visible that both cases overflowed the text area - case 1 is clearly visible, but also case 2 overflowed by few pixels.

In real document overflowed area is variable depending on contents which makes sometimes collisions with objects on the right side (images, ...).

How to hyphenate URLs correctly to avoid such overflows?

• ideal solution is perfectly aligned block




• but acceptable is also solution with underflowed line instead of overflowed (earlier line break instead of late)

I guess problem is mainly caused by non-proportional font and is fixed if other proportional text is present at the same line, but how to handle alone parts of long URLs?

documentclass[a4paper]{book}



usepackage{fontspec}



usepackage{polyglossia}

setmainlanguage{czech}



usepackage{ulem}

usepackage[unicode]{hyperref}

defUrlBreaks{do{a}} % Force correct hyphenation for this example





usepackage{pdfpages}



usepackage{needspace}



begin{document}



Reference text. Reference text. Reference text. Reference text. Reference text. Reference text. Reference text. Reference text. Reference text. Reference text.newline

url{http://aaa.bbb.ccc/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa}newline

Some text before. url{http://aaa.bbb.ccc/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa} Some text after. Some text after. Some text after. Some text after. Some text after. Some text after. Some text after. Some text after. Some text after. Some text after. Some text after.



end{document}