https://bugs.documentfoundation.org/show_bug.cgi?id=107296
Bug ID: 107296
Summary: Moving cursor leaves behind "scum" if paragraph has
two directionalities
Product: LibreOffice
Version: 5.2.6.2 release
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: medium
Component: Writer
Assignee: libreoffice-bugs@lists.freedesktop.org
Reporter: n...@math.technion.ac.il
Created attachment 132715
--> https://bugs.documentfoundation.org/attachment.cgi?id=132715&action=edit
Example of "scum", small slanted lines, left behind when moving around a mixed
RTL-LTR paragraph.
It seems that fairly recently, LibreOffice acquired an interesting feature
where if a certain paragraph has two different directionalities - e.g., an RTL
paragraph with an LTR word, or LTR paragraph with an LTR word - when you move
around this paragraph with the cursor keys, the cursor appears not just as a
thin line (as it previously was), but as a thin line with a small triangular
"head" pointing to the direction depending on the directionality of the part of
the paragraph you are on.
So far so good. But the bug is that as you move the cursor, small bits of this
arrow are left behind on the display, looking like tiny slanted lines. These
lines do not disappear when the window is refreshed, but they do disappear if
you go to a different page and return (i.e., they are obviously just display
artifacts, not anything saved to the file).
I attach a typical example of the "scum" left on the display. Here I randomly
typed a few English and a few Hebrew characters in the same paragraph, and used
the arrow keys to move back and forth in that paragraph. You can see the
result.
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