* lisp/image/wallpaper.el (wallpaper-setter): Add 'init-action'
and 'detach' fields to structure.
(wallpaper--init-action-kill): New helper function.
(wallpaper--default-setters): Use above new fields for "swaybg" and
"wbg", to start/restart the corresponding processes as needed.
(wallpaper-default-set-function): Call 'init-action' function if
there is one. If 'detach', use 'call-process' instead of
'start-process'. (Bug#57781)
* test/lisp/image/wallpaper-tests.el (wallpaper--find-setter)
(wallpaper--find-setter/call-predicate)
(wallpaper--find-setter/set-current-setter)
(wallpaper-set/runs-command, wallpaper-set/runs-command/detach)
(wallpaper-set/calls-init-action)
(wallpaper-set/calls-wallpaper-set-function): New tests.
* lisp/image/wallpaper.el (wallpaper--find-command)
(wallpaper--find-command-args): Avoid backtrace when
'wallpaper--find-setter' returns nil, e.g. on MS-Windows.
(Bug#58167)
* lisp/image/wallpaper.el
(wallpaper--format-arg): Break out function from here...
(wallpaper--x-monitor-name): ...to here. Try to get the monitor name
non-graphical displays, and prompt if that doesn't work.
(wallpaper-default-set-function): Improve debugging output.
Ref. https://lists.gnu.org/r/emacs-devel/2022-09/msg01910.html
This fixes setting the wallpaper on XFCE whether or not the
"/backdrop/single-workspace-mode" setting is true or false.
That XFCE setting controls whether or not the same wallpaper is used
on all workspaces or not.
* lisp/image/wallpaper.el (wallpaper-setter)
(wallpaper-command-args, wallpaper-default-set-function): Allow
using a function for getting the command line arguments.
(wallpaper-xfce-command-args): New function.
(wallpaper--default-setters): Use above new function for XFCE.
* lisp/image/wallpaper.el (wallpaper-command-args)
(wallpaper-default-set-function): Support new format specifiers
%S for screen, %W for workspace, and %M for monitor.
(wallpaper--default-setters): Use above new specifiers for XFCE.
(wallpaper--format-arg): New defun broken out from...
(wallpaper-default-set-function): ...here.
(wallpaper--get-height-or-width): Support noninteractive use.
* test/lisp/image/wallpaper-tests.el (wallpaper--format-arg/filename)
(wallpaper--format-arg/filename-hex)
(wallpaper--format-arg/width, wallpaper--format-arg/screen)
(wallpaper--format-arg/monitor, wallpaper--format-arg/workspace):
New tests.
* lisp/image/wallpaper.el
(wallpaper--default-commands): Delete variable.
(wallpaper-setter): New cl-defstruct.
(wallpaper--default-methods-create): New macro.
(wallpaper--default-setters):
(wallpaper--current-setter): New variables.
(wallpaper--find-setter): New defun to pick a wallpaper-setter.
(wallpaper--find-command, wallpaper--find-command-args):
Use 'wallpaper--find-setter'.
(wallpaper-command): Doc fix.
* test/lisp/image/wallpaper-tests.el
(wallpaper--find-command/return-string)
(wallpaper--find-command-args/return-list)
(wallpaper--image-file-regexp/return-string): New tests.
* lisp/image/wallpaper.el (wallpaper-set-function): New defvar
containing system specific function for setting wallpaper.
(wallpaper-default-set-function): Factor out function from...
(wallpaper-set): ...here. Use above new defvar.
(wallpaper-default-file-name-regexp): Delete defvar.
(wallpaper-image-file-extensions): New defvar.
(wallpaper--image-file-regexp): New defun that returns a regexp to
match for completion purposes.
(wallpaper--use-default-set-function-p): New defun.
(wallpaper--find-command, wallpaper--find-command-arguments):
Do nothing on MS-Windows and Haiku.
* lisp/image/wallpaper.el
(wallpaper-default-file-name-regexp): New variable.
(wallpaper--get-default-file): New function.
(wallpaper-set): Use above new function to set a default.
* test/lisp/image/wallpaper-tests.el: New file.
* lisp/image/wallpaper.el (wallpaper--default-commands)
(wallpaper--check-command, wallpaper-command): Add support for Unity,
Pantheon, Budgie, LXQt, and LXDE. Also add support for Lubuntu,
Xubuntu, and Pop!_OS.
* lisp/image/wallpaper.el (wallpaper--default-commands): Rearrange
order to prioritize desktop environment specific commands before
general Wayland commands like "wbg" or even "swaybg". (Bug#57781)
* lisp/image/wallpaper.el (wallpaper-command):
Include nil in the type since that is a valid value for the variable,
and may be the default value. This should fix test-custom-opts.
* lisp/image/wallpaper.el (wallpaper--default-commands)
(wallpaper-command): Support macOS using "osascript".
(wallpaper-set): Display image name when wallpaper-debug is t.
* src/w32fns.c (Fw32_set_wallpaper): New primitive.
(syms_of_w32fns): Defsubr it.
(globals_of_w32fns): Attempt to load SystemParametersInfoW from
its DLL at run time.
* lisp/image/wallpaper.el (wallpaper-set): Support MS-Windows by
calling 'w32-set-wallpaper'.
* etc/NEWS: Update and simplify wording of the 'wallpaper-set'
entry.
* lisp/image/wallpaper.el
(wallpaper--default-commands): New defvar.
(wallpaper--find-command): Use above new defvar.
(wallpaper--find-command-arguments): New defun.
(wallpaper-command): Rename from 'wallpaper-commands' and change
type to string. Use 'wallpaper--find-command' to set it.
(wallpaper-command-args): New defcustom. Use
'wallpaper--find-command-arguments' to set it.
(wallpaper--set-wallpaper-command): New defun. Use as :set property
for 'wallpaper-command'.
(wallpaper-set): Use above new defcustoms to set the wallpaper.
Suggested by Eli Zaretskii <eliz@gnu.org>.
* lisp/image/wallpaper.el (wallpaper-set): Allow setting wallpaper
when 'display-graphic-p' is nil.
(wallpaper-default-width, wallpaper-default-height):
New variables.
(wallpaper--get-height-or-width): New helper function.
* lisp/image/wallpaper.el (xdg): Require.
(wallpaper--check-command): Use xdg-current-desktop instead of reading
XDG_CURRENT_DESKTOP directly. This fixes things on e.g. Ubuntu, where
XDG_CURRENT_DESKTOP might contain a string like "ubuntu:GNOME".
