https://bugs.kde.org/show_bug.cgi?id=423538
Bug ID: 423538
Summary: cache directory thumbnails
Product: kio-extras
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Thumbnails and previews
Assignee: plasma-b...@kde.org
Reporter: sit...@kde.org
Target Milestone: ---
Directory thumbs are a composite of thumbnails of content within that
directory. The content thumbs are already cached so that's cool. But the
composite appears to get generated over and over again even when its content
hasn't changed. This could be improved somewhat easily...
- cache the composite with a bit of proprietary attribute since the spec has no
useful existing [1]. X-KDE::DirParts or somesuch, a comma separated list of
md5sums of thumbnails comprising the composite
- on thumbnail attempts (if cache for dir exists):
-- load cache
-- read DirParts attribute
-- iterate directory
-- foreach dirent
---- createThumbOrLoadFromCache
----- is md5 NOT in DirParts -> invalidate dir cache and re-composite
-- if selected md5s.count < DirParts.count re-composite (e.g. previewable
content went from 4 to 3)
This would then mean that dir previews do not change unless the underlying
parts change.
[1]
https://specifications.freedesktop.org/thumbnail-spec/thumbnail-spec-latest.html
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