Using proportional line spacing with less than 100 % makes the first line of each paragraph and each page considerably lower than all the other lines.
This problem is an issue particularly with fonts designed for Arabic, where the default line spacing is very big so as to allow for space for optional vowel marks below and above the line. If these marks are not used, the space between the lines is often too big. If I change line spacing to proportional 80 %, most of the lines look fine but the first line of each paragraph and of each page (even without a paragraph break) gets crammed into the second line. As a user, I would rather expect the first line to have the same visual height as all the other lines. See the attached document and screenshots using Noto Naskh Arabic and 80 % line spacing.
Description: Ubuntu 17.10
Release: 17.10
libreoffice-writer:
Installed: 1:5.4.6-0ubuntu0.17.10.1
Candidate: 1:5.4.6-0ubuntu0.17.10.1
Version table:
*** 1:5.4.6-0ubuntu0.17.10.1 500
500 http://mr.archive.ubuntu.com/ubuntu artful-updates/main amd64 Packages
100 /var/lib/dpkg/status
1:5.4.5-0ubuntu0.17.10.5 500
500 http://security.ubuntu.com/ubuntu artful-security/main amd64 Packages
1:5.4.1-0ubuntu1 500
500 http://mr.archive.ubuntu.com/ubuntu artful/main amd64 Packages
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: libreoffice-writer 1:5.4.6-0ubuntu0.17.10.1
ProcVersionSignature: Ubuntu 4.13.0-41.46-generic 4.13.16
Uname: Linux 4.13.0-41-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.8
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon May 21 14:50:01 2018
InstallationDate: Installed on 2017-02-13 (462 days ago)
InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=fi_FI.UTF-8
SHELL=/bin/bash
SourcePackage: libreoffice
UpgradeStatus: Upgraded to artful on 2017-11-05 (196 days ago)
Description:
When Paragraph style - line spacing - proportional is set to value smaller than 100%, the spacing between first and the second line in the paragraph is wrong, it is too small. The second line ends up being too close to the first line. It looks very odd.
It gets worse is you set "line spacing"- proportional to really small values, like 60% or 50%.
Other lines in a paragraph seem to be spaced correctly.
All fonts are affected, but on some fonts the error is less noticable.
With "liberation serif", the error is smaller.
Try "Deja Vu Sans", line height: proportional-57%
Try "liberation serif", line height: proportional-50%
On some fonts, like "Charis Sil", it gets really annoying at proportional-90%
Steps to Reproduce:
1. Type a paragraph of text having at least 3 lines, (5 is better)
2. Change the font of the paragraph to "liberation serif"
3. Right click on the paragraph, select "edit style", go to "Indents and spacing", "Line spacing", set it to "Proportional":50%, click OK
Actual Results:
The spacing between the first and the second line is smaller than spacing between second and third line.
Expected Results:
All lines spaced evenly.
Reproducible: Always
User Profile Reset: No
Additional Info:
There is an additional bug. When line spacing: proportional is set to small values (<40%), the (rendering of) first line of text get clipped on it's upper part.
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:49.0) Gecko/20100101 Firefox/49.0