New subject: [Bug 51134] Support redirecting GetOpenFileName and GetSaveFileName through org.freedesktop.portal.FileChooser

12 May 2021

      https://bugs.winehq.org/show_bug.cgi?id=51134

            Bug ID: 51134
           Summary: Support redirecting GetOpenFileName and
                    GetSaveFileName through
                    org.freedesktop.portal.FileChooser
           Product: Wine
           Version: unspecified
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P2
         Component: -unknown
          Assignee: wine-bugs(a)winehq.org
          Reporter: from_wine_bugzilla(a)ssokolow.com
      Distribution: ---

While not all options in the OPENFILENAME structure can be supported via the
org.freedesktop.portal.FileChooser interface, providing the option to redirect
an application's request for a common Open/Save dialog through the XDG chooser
system would have two beneficial effects on non-OSX POSIX systems:

1. Better integration, since the application run under Wine would use the
native desktop file pickers, complete with the user's Places sidebar bookmarks
and any other customizations they've enacted.

2. More practical security, since Wine could then be run in a filesystem
sandbox, with the portal host mounting files/directories into the sandboxed
environment on demand.

I'd suggest a three-state option exposed through winecfg's Desktop Integration:

1. Opportunistically (Qt's approach to integrating support for XDG portals into
QFileDialog provides precedent for making this the default. Uses the
portal-based file chooser unless an application requests a combination of
OPENFILENAME settings that cannot be represented by the portal API.)

2. Forced (An option for power users to set on a per-application basis to
intentionally sacrifice the application's customizations in favour of better
integration with the understanding that things may break.)

3. Never (An option for users who prefer consistency between their Windows
applications over consistency with the rest of their desktop or have deleted
the Z: mapping and configured their Wine prefix around the idea of only working
with drive letters.)

These high-level preferences could also apply equally well to any other
platform's native file chooser, should integration with it be implemented.

The D-Bus API in question is documented at
https://flatpak.github.io/xdg-desktop-portal/portal-docs.html#gdbus-org.free...

While it is outside the scope of this feature request, it may also be possible
to use the TrashFile() method of this API to integrate with the host desktop's
Trash.

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[Bug 51134] New: Support redirecting GetOpenFileName and GetSaveFileName through org.freedesktop.portal.FileChooser

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