Issue 40166 - BiDi control information ignored
Summary: BiDi control information ignored
Alias: None
Product: Impress
Classification: Application
Component: viewing (show other issues)
Version: OOo 2.0
Hardware: All All
: P3 Trivial (vote)
Target Milestone: ---
Assignee: AOO issues mailing list
QA Contact:
Depends on:
Reported: 2005-01-07 21:34 UTC by ikonst
Modified: 2013-08-07 15:21 UTC (History)
1 user (show)

See Also:
Issue Type: DEFECT
Latest Confirmation in: ---
Developer Difficulty: ---

Sample (on 2nd slide; 3rd line from the bottom) (126.57 KB, application/x-compressed)
2005-01-07 21:37 UTC, ikonst
no flags Details

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Description ikonst 2005-01-07 21:34:39 UTC
It seems to be that PowerPoint documents have some way to perform additional
BiDi control and fine-tunning (in the same fashion as it is possible with
RLE/LRE/LRM/LRM) which is not via BiDi control characters but some custom
PowerPoint properties which are not represented on the UI level. Those marks are
silently inserted when the user types.

OOo Presentation program seems to ignore this information, which causes it to
misrender presentations, especially ones with lots of mathematical references.
For example, consider the following:
"x - ab OF HTGNEL EHT"
instead gets rendered as
"ab - x OF HIGNEL EHT"
since the control characters intended to inhibit "-" and "ab" from joining were
Comment 1 ikonst 2005-01-07 21:37:28 UTC
Created attachment 21224 [details]
Sample (on 2nd slide; 3rd line from the bottom)
Comment 2 ikonst 2005-01-07 21:40:10 UTC
I've attached one such PowerPoint presentation to demonstrate my point. Since I
don't have PowerPoint here, I didn't dare to minimize this testcase for fear
that I'll loose valuable attributes during re-saving. The problem can be seen on
the 2nd slide -- the 3rd and 2nd lines from the bottom.
Comment 3 wolframgarten 2005-01-10 08:04:53 UTC
Comment 4 wolframgarten 2005-01-10 08:05:22 UTC
Reassigned to Christian. Please have a look.
Comment 5 clippka 2005-01-11 12:59:17 UTC
Sven, please take over
Comment 6 sven.jacobi 2005-01-18 14:52:47 UTC
sj: This Issue is double to issue 23413. BiDi support will be added to our
FontWork for OOo 2.0.

*** This issue has been marked as a duplicate of 23413 ***
Comment 7 sven.jacobi 2005-01-25 17:28:13 UTC
I am sorry for closing this Issue, it is in fact not double to i23413.
Comment 8 sven.jacobi 2005-01-25 17:30:52 UTC
Because it is not possible to forecast how long it will last to fix this issue
(file format of PPT is not disclosed), I set the target to OOo later.
Comment 9 enapannes 2010-11-11 01:48:09 UTC
Created attachment 74016