The `config.h` header is local, and generated by us. It should always be
included as:

    #include "config.h"

https://bugzilla.gnome.org/show_bug.cgi?id=782818

Dominique Leuenberger authored Jan 08, 2014 and Baptiste Mille-Mathias committed Sep 13, 2015

https://bugzilla.gnome.org/show_bug.cgi?id=721503

We can't use colons, but a separator here still looks nice. Use a dash.

In commit 51485cf6 we removed colons and
spaces from the screenshot default filenames, but removing spaces is
not really needed for the purpose of the patch (compatibility with FAT
filesystems) and it looks bad. Bring spaces back.

Robert Roth authored Jan 19, 2015 and Cosimo Cecchi committed Jan 19, 2015

https://bugzilla.gnome.org/show_bug.cgi?id=742476

Philippe Coval authored Apr 24, 2013 and Cosimo Cecchi committed Nov 21, 2014

Bug: https://bugzilla.gnome.org/show_bug.cgi?id=698740

Stefan Assmann authored May 03, 2013 and Cosimo Cecchi committed Jul 17, 2013

By default screenshots are saved as png. Add the setting
org.gnome.gnome-screenshot default-file-type
to allow specifying other formats as default as well.

https://bugzilla.gnome.org/show_bug.cgi?id=701179

So that application can insert a better name for the screenshot.

https://bugzilla.gnome.org/show_bug.cgi?id=679056

g_strconcat ("file://", ...); is never a good way to create URIs
and most of the functions worked on local paths instead of URIs, so
use paths everywhere.

https://bugzilla.gnome.org/show_bug.cgi?id=679055

https://bugzilla.gnome.org/show_bug.cgi?id=679056

screenshot-filename-builder.c:295:1: warning: no previous prototype for 'screenshot_build_filename_async' [-Wmissing-prototypes]
screenshot-filename-builder.c:322:1: warning: no previous prototype for 'screenshot_build_filename_finish' [-Wmissing-prototypes]

https://bugzilla.gnome.org/show_bug.cgi?id=679057

So it could be reused in other applications.

https://bugzilla.gnome.org/show_bug.cgi?id=679054

As a last resort, save screenshots in $HOME when everything else fails.

https://bugzilla.gnome.org/show_bug.cgi?id=672833

This makes more sense, since the screenshot has already
happened.

https://bugzilla.gnome.org/show_bug.cgi?id=670753

When we're not in interactive mode, we don't want to follow gsettings
preferences such as delay or including the window border.
Since changing options in interactive mode saves them to gsettings, we
would end up in a situation where e.g. setting a delay there would have
made that delay the default for key press invocation too.

Don't show a dialog prompt if we're not in interactive mode, but just
save the image to the saved screenshot directory (or if that doesn't
exist, to the default location).

Instead of passing it through; simplifies code.

Move the async function that builds a filename into a separate file.