https://bugs.kde.org/show_bug.cgi?id=220496
--- Comment #13 from miklos <mtm...@gmail.com> --- Now I found this again, and I had some time to debug it. The file metadata is gathered by FileMetaDataWidget of baloo-widgets, which launches an external program (baloo_filemetadata_temp_extractor) to parse the file and return its properties, so the file description in the tooltip and the information panel is always correct. The preview is generated with KIO::PreviewJob(), which gets the mime type of the file from its name: kio/src/widgets/previewjob.cpp:304 calls kio/src/core/kfileitem.cpp:732, where QMimeDatabase is asked for the mime type based on the file name. This is wrong when the file suffix is wrong, and apparently there is a different preview generator for jpeg and png. I see three possible solutions: - QMimeDatabase supports parsing the file to find out its type - do not filter for mime type in PreviewJob, try all preview generators and accept the first success (the preview generators need to be ordered carefully to minimize the chance of false positive) - use the file properties gathered by baloo-widgets when requesting the preview (this needs new API in KIO::PreviewJob, and I'm not sure if KIO is allowed to depend on Baloo) I'm leaning toward option 2. It works fine in Okular for example. -- You are receiving this mail because: You are watching all bug changes.
