[Libreoffice-bugs] [Bug 141749] New: Text Tearing, Font Shrinkage, and Line Shifting bug related to use of Sidebar

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=141749

            Bug ID: 141749
           Summary: Text Tearing, Font Shrinkage, and Line Shifting bug
                    related to use of Sidebar
           Product: LibreOffice
           Version: 7.1.2.2 release
          Hardware: All
                OS: Windows (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Writer
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: tarotfied at protonmail.com

Description:
The so-called text tearing bug seems to be a side effect of having the
View>Sidebar option checked, regardless of whether or not the sidebar is
maximized, in minimized tab view, or hidden (a tiny sliver of it is still there
to indicate the left-pointing Show arrow alongside the vertical scroll bar
that’s used to expand the sidebar). There is an exception to this and that is
if the sidebar is docked to the left-hand side of the monitor screen, then the
bug no longer manifests itself.

I say so-called text tearing bug because that is only one symptom of this
particular bug. There are times when the text does indeed seem to tear across
either an entire line of text as you are scrolling up/down through a document
or just a highlighted section of text when using the Clone Formatting tool, but
more often than not the issue is that the lines of text shrink in height
(sometimes only marginally, sometimes rather significantly).

Note: Some users may NOT notice this bug because they are using 100% screen
layout view. The bug is far more noticeable if using the Fit Width or Optimal
Zoom Factor settings, as the problem is thus magnified. Also, some shorter
documents do not seem to ever demonstrate the above mentioned symptoms.

Also of importance in replicating the bug is that you do NOT actually have to
see the text tearing or font shrinkage to know it is there. The tell-tale sign
of the bug is line shifting, which you can easily see and verify for yourself
by scrolling down a document to a point, then Toggle Automatic Spell Checking.
Of course the red and blue squiggly lines indicating a spelling or grammatical
error will come and go, but the text lines should be rock solid, but if they
shift up or down even slightly—then you are experiencing the bug.

So, the short-term, band-aid "fix" is to deselect the View>Sidebar option
(Ctrl+F5) until someone delves into the source code for a permanent fix.



Steps to Reproduce:
1. Select a long, heavily formatted document (headers, lists, tables, etc.)
2. Either select text for formatting, scroll vertically, or toggle automatic
spell checking after scrolling (first two in particular are intermittent)

Actual Results:
Text tearing while selecting text, font shrinkage after scrolling, and line
shifting when toggling automatic spell checking.

Expected Results:
No text tearing, font shrinkage, or line shifting during use.


Reproducible: Sometimes


User Profile Reset: Yes



Additional Info:
Version: 7.1.2.2 (x64) / LibreOffice Community
Build ID: 8a45595d069ef5570103caea1b71cc9d82b2aae4
CPU threads: 4; OS: Windows 10.0 Build 19042; UI render: default; VCL: win
Locale: en-US (en_US); UI: en-US
Calc: threaded

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/libreoffice-bugs/attachments/20210418/7d6adf7c/attachment.htm>