[Xfce-bugs] [Bug 15913] New: Thunar does not implements the "shared thumbnails" feature of thumbnail spec

[bugzilla-daemon at xfce.org]

https://bugzilla.xfce.org/show_bug.cgi?id=15913

            Bug ID: 15913
           Summary: Thunar does not implements the "shared thumbnails"
                    feature of thumbnail spec
    Classification: Xfce Core
           Product: Thunar
           Version: 1.6.12
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Medium
         Component: General
          Assignee: xfce-bugs at xfce.org
          Reporter: michael at wyraz.de
  Target Milestone: 1.8.10

The freedesktop thumbnail spec described how to store and retreive thumbnails.
Thunar impements only part of the spec. The "shared thumbnail folder" part
described in 
https://specifications.freedesktop.org/thumbnail-spec/latest/x329.html is
entirely missing.

To implement the spec fully, the following things needs to be changed:
- thunar needs to check .sh_thumbnails and display thumbnails there before
requesting new thumbanils to be created by tumbler
- tubler needs only to create tumbnails if they are not already in
.sh_thumbnails
- for remote drive, thumbnails should also be displayed if they are in 
.sh_thumbnails, even if thumbanils for remote drives are disabled.

How to test:
- delete ~/.cache/thumbnails
- on a remote drive, create shared thumbnails (e.g. using
https://github.com/jesjimher/genthumbs/blob/master/genthumbs.sh).
- on thunar browse the folder with remote thumbnails enabled
- verify that thumbnails are shown
- verify that ~/.cache/thumbnails remains empty.

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