https://bugs.kde.org/show_bug.cgi?id=451226
Bug ID: 451226
Summary: No thumbnail for EPUB3 files
Product: kio-extras
Version: 21.12.3
Platform: Archlinux Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Thumbnails and previews
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
The thumbnailer for Epub 3.0 does not work properly. The file from IDPF (the
spec creators) has no cover in Dolphin, even though one is in the file:
https://github.com/IDPF/epub3-samples/releases/download/20170606/epub30-spec.epub
STEPS TO REPRODUCE
1. Put the file into Dolphin
2. Enable previews
OBSERVED RESULT
Generic file icon
EXPECTED RESULT
Cover from the EPUB file itself.
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma:
(available in About System)
KDE Plasma Version: 5.24.2
KDE Frameworks Version: 5.91.0
Qt Version: 5.15.3
ADDITIONAL INFORMATION
I have done some debugging using the code from
https://github.com/KDE/kio-extras/blob/master/thumbnail/ebookcreator.cpp
It seems that coverHref is found properly here:
https://github.com/KDE/kio-extras/blob/20f476fabfc3f5c50e514c075cea429f62f59652/thumbnail/ebookcreator.cpp#L157
But then the break on the next line skips the assignment itemHrefs[id] = href
(this is ok, as we have already found the proper cover file).
Nonetheless, in the end, it's the (now broken) itemHrefs map that is used as
the source for final coverHref, not the coverHref variable that was
meticulously found before:
https://github.com/KDE/kio-extras/blob/20f476fabfc3f5c50e514c075cea429f62f59652/thumbnail/ebookcreator.cpp#L203
I suppose that line 203 should rather read:
QByteArray encoded = coverHref.toUtf8();
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