Bug 308181

Summary:	Cannot search for the word 'define'
Product:	[Applications] okular	Reporter:	kikanki
Component:	general	Assignee:	Okular developers <okular-devel>
Status:	RESOLVED FIXED
Severity:	normal	CC:	aacid, pieter.nuyts
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	unspecified
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description kikanki 2012-10-10 14:59:47 UTC

I cannot search for the word 'define'. It is something special with this word. Maybe a flaw in some regexp?

Reproducible: Always

Steps to Reproduce:
1. Open a pdf document that contains the word 'define'.
2. Ctrl+f, type in 'define' (without the ' ' of course) and press enter.
3. Try search for any other word in the document.
Actual Results:  
Okular do not find the occurances of 'define' but other words are ok.

Expected Results:  
I expect Okular to find 'define' too.

Comment 1 Albert Astals Cid 2012-10-10 15:02:14 UTC

attach the document you are using

Comment 2 kikanki 2012-10-10 15:27:20 UTC

It seems to be known as the 'fi'-problem. The characters f and i, written together, renders quite tight in some fonts, which seems to cause problems. It's not specific to Okular. It happens for instance to adobe acrobat reader to, but only in the browser embedded reader (sic).

I guess we can 'define' this problem resolved.

Comment 3 Albert Astals Cid 2012-10-10 15:30:10 UTC

You're probably using an ultra old version of okular, get a newer one

Comment 4 Christoph Feck 2012-10-10 17:39:09 UTC

Search for "ligatures fl fi".

Comment 5 Pieter Nuyts 2012-11-08 12:49:01 UTC

They're not just put close to each other, but indeed as fi or fl ligatures, which are separate characters.  LaTeX (and probably many other programs) do this on purpose since it looks nicer.  It's indeed not specific to Okular but it would be nice to solve it: whenever a search term contains 'fi' or 'fl', just do a second search with those letters replaced by the ligatures?