Bug 155557 - Wrong rendering of underline for justified mixed RTL/LTR script text
Summary: Wrong rendering of underline for justified mixed RTL/LTR script text
Status: NEW
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: LibreOffice (show other bugs)
Version:
(earliest affected)
7.6.0.0 alpha1+
Hardware: All All
: medium normal
Assignee: Not Assigned
URL:
Whiteboard:
Keywords:
Depends on:
Blocks: Kashida-Justification
  Show dependency treegraph
 
Reported: 2023-05-30 13:46 UTC by Hossein
Modified: 2023-09-04 16:41 UTC (History)
1 user (show)

See Also:
Crash report or crash signature:


Attachments
Screenshot of italic text (402.61 KB, image/png)
2023-06-01 11:49 UTC, ⁨خالد حسني⁩
Details

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Description Hossein 2023-05-30 13:46:05 UTC
Description:
This is spin off of tdf#152048. If you underline the text for a paragraph with mixed RTL/LTR justified text, rendering of the underline for the text will be incorrect. In the above mentioned bug, the problem with RTL only text was fixed.

Steps to Reproduce:
1. Open attachment 183604 [details]. All the text should have underline

Actual Results:
The underline is cut off or rendered out of the correct region

Expected Results:
The underline should be rendered consistently below all of the text.


Reproducible: Always


User Profile Reset: No

Additional Info:
Version: 7.6.0.0.alpha1+ (X86_64) / LibreOffice Community
Build ID: d785d26a5599d3d546b96958b0f1c6d5ed777a0d
CPU threads: 12; OS: Linux 5.19; UI render: default; VCL: gtk3
Locale: en-US (en_US.UTF-8); UI: en-US
Calc: CL threaded
Comment 1 ⁨خالد حسني⁩ 2023-05-31 14:02:16 UTC
Is this a regression?
Comment 2 Commit Notification 2023-06-01 05:10:50 UTC
Khaled Hosny committed a patch related to this issue.
It has been pushed to "master":

https://git.libreoffice.org/core/commit/99d22fd79c5532fd6c1b167996e1c27216b92469

tdf#155557: Fix drawing mixed direction underlined text

It will be available in 7.6.0.

The patch should be included in the daily builds available at
https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More
information about daily builds can be found at:
https://wiki.documentfoundation.org/Testing_Daily_Builds

Affected users are encouraged to test the fix and report feedback.
Comment 3 Hossein 2023-06-01 10:32:07 UTC
(In reply to خالد حسني from comment #1)
> Is this a regression?
No, as you have also mentioned in the commit description, this problem is inherited from OpenOffice.org. In the tdf#152048 attachments, I've previously attached these two files from LibreOffice 3.5, and OpenOffice.org 3.2, which both have the same problem.

Justified Persian/English text (PDF), all the text is underlined (LO 3.5)
https://bugs.documentfoundation.org/attachment.cgi?id=183614

Justified Persian/English text (PDF), all the text is underlined (OOo 3.2)
https://bugs.documentfoundation.org/attachment.cgi?id=183615
Comment 4 Hossein 2023-06-01 10:52:38 UTC
Thanks Khaled for the fix. Verified the fix with the latest master:

Version: 7.6.0.0.alpha1+ (X86_64) / LibreOffice Community
Build ID: f15a6e1b1b186bf42e1ade05630d17841add2c46
CPU threads: 12; OS: Linux 5.19; UI render: default; VCL: gtk3
Locale: en-US (en_US.UTF-8); UI: en-US
Calc: threaded

A side issue that is visible now is tdf#155623. Please take a look.
Comment 5 Hossein 2023-06-01 11:09:27 UTC
OK, let me re-open the issue because when making the text bold/italic causes the underline gap to appear again.
Comment 6 ⁨خالد حسني⁩ 2023-06-01 11:16:48 UTC
(In reply to Hossein from comment #5)
> OK, let me re-open the issue because when making the text bold/italic causes
> the underline gap to appear again.

I see a gap with italic, but it is independent of the justification, so a different bug (it is a cane of worms), but with bold I get the same tiny gap as the regular.
Comment 7 ⁨خالد حسني⁩ 2023-06-01 11:45:30 UTC
(In reply to خالد حسني from comment #6)
> (In reply to Hossein from comment #5)
> > OK, let me re-open the issue because when making the text bold/italic causes
> > the underline gap to appear again.
> 
> I see a gap with italic, but it is independent of the justification, so a
> different bug (it is a cane of worms), but with bold I get the same tiny gap
> as the regular.

Scratch that, I see the issue now. I don’t know what I was looking at last time.
Comment 8 ⁨خالد حسني⁩ 2023-06-01 11:49:38 UTC
Created attachment 187639 [details]
Screenshot of italic text

(In reply to خالد حسني from comment #7)
> (In reply to خالد حسني from comment #6)
> > (In reply to Hossein from comment #5)
> > > OK, let me re-open the issue because when making the text bold/italic causes
> > > the underline gap to appear again.
> > 
> > I see a gap with italic, but it is independent of the justification, so a
> > different bug (it is a cane of worms), but with bold I get the same tiny gap
> > as the regular.
> 
> Scratch that, I see the issue now. I don’t know what I was looking at last
> time.

Actually, my first comment was right. I attached a screenshot now.
Comment 9 Commit Notification 2023-06-01 13:50:00 UTC
Khaled Hosny committed a patch related to this issue.
It has been pushed to "master":

https://git.libreoffice.org/core/commit/ef30d351da288b3513cfd30cb82bff7e0827fcb3

tdf#155623: Revert "tdf#155557: Fix drawing mixed direction underlined text"

It will be available in 7.6.0.

The patch should be included in the daily builds available at
https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More
information about daily builds can be found at:
https://wiki.documentfoundation.org/Testing_Daily_Builds

Affected users are encouraged to test the fix and report feedback.