Re: [fltk.coredev] RFC: about DnD of filenames to an FLTK app - Forums

On 3/6/23 11:29 Manolo wrote:

When files are dragged from a file manager window to an FLTK app,

platform-specific behaviours are presently as attached.

I don't remember what X11 configuration produces "file://" prefixes

and URI-encoded filenames. That's not what I see now.

This behavior very likely depends on the file manager that issues the drag-n-drop operation.

Shouldn't we uniformize this and have the X11 platform behave as

all others do, that is, put pathnames on separate lines without encoding

nor prefixes ?

Yes, that would be a good simplification of the required user code.

That would make 1.4 slightly changed relatively to 1.3 in behaviour

but not in API. Nevertheless, user code that would decode encoded

filenames or that would remove "file://" prefixes would just do nothing

with the uniformized behaviour. Existing 1.3 code would be largely compatible

with the modified 1.4 behaviour with no change.

I believe that this would be a minor issue (users could easily account for this).

The only difference

would be that an app expecting multiple pathnames on a single line would

receive them on successive lines.

That might be a bigger issue. It could impact parsing files in user code.

Comments? Suggestions?

Another thing I'm not sure about is removing and thus hiding the prefixes like "file://" or "computer://". Maybe there is some significant information in these prefixes that some programs are using for whatever reason (I don't know one, but anyway).

Here are some examples, created with three different file managers (nemo, nautilus, thunar) and the FLTK editor example program in Wayland and/or X11 mode:

nemo DND to FLTK editor in Wayland mode:

davs://info%40<my_domain>@webdav.<my_cloud>/users/<my_domain>/fltk/glpuzzle.png
davs://info%40<my_domain>@webdav.<my_cloud>/users/<my_domain>/fltk/keyboards.png

nautilus DND to FLTK editor in Wayland mode:

file:///run/user/1000/gvfs/dav:host=webdav.<my_cloud>,ssl=true,user=info%2540<my_domain>/users/<my_domain>/fltk/glpuzzle.png
file:///run/user/1000/gvfs/dav:host=webdav.<my_cloud>,ssl=true,user=info%2540<my_domain>/users/<my_domain>/fltk/keyboards.png

thunar: No DND and no copy/paste to editor with in Wayland mode

thunar DND to FLTK editor in x11 mode (see note 2 below):

file:///run/user/1000/gvfs/dav:host=webdav.<my_cloud>,ssl=true,user=info%2540<my_domain>/users/<my_domain>/bilder/Screenshot%20from%202020-05-30%2021-20-16.png
file:///run/user/1000/gvfs/dav:host=webdav.<my_cloud>,ssl=true,user=info%2540<my_domain>/users/<my_domain>/bilder/Screenshot%20from%202020-12-22%2022-52-41.png

thunar copy-paste to FLTK editor in x11 mode (see note 2 below):

davs://info%40<my_domain>@webdav.<my_cloud>/users/<my_domain>/bilder/Screenshot%20from%202020-05-30%2021-20-16.png
davs://info%40<my_domain>@webdav.<my_cloud>/users/<my_domain>/bilder/Screenshot%20from%202020-12-22%2022-52-41.png

(End of examples)

Note 1: I replaced all personal parts with '<...>' including the '<' and '>' characters which are not part of the original string.

Note 2: I succeeded in using 'thunar' in one example but couldn't reproduce it later. I didn't investigate further.

Maybe we could make this behavior change optional or provide a function/method like "normalize_filename_list()" with different options which parts to "normalize" and which ones not. It could also help to provide a "parse_filename()" method that could split the filenames in their distinct parts like prefix, host, directory, filename, or something similar.

Just my 2 ct.

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