From .desktop files, reuse a frame or start a new Emacs as required

* doc/emacs/misc.texi: (Using Emacs as a Server) Explain
emacsclient.desktop.
* etc/NEWS: (Emacs Server): Explain emacsclient.desktop.
* emacs-mail.desktop, etc/emacsclient.desktop: Automatically try to
reuse an existing frame, open a new frame, or start a new Emacs
daemon.  Add actions for specific behaviours (bug#49195).

1 files changed, 13 insertions, 3 deletions

diff --git a/etc/emacs-mail.desktop b/etc/emacs-mail.desktop
index 0c5fab1dd12..251afa100cd 100644
--- a/etc/emacs-mail.desktop
+++ b/etc/emacs-mail.desktop
@@ -1,12 +1,22 @@
 [Desktop Entry]
 Categories=Network;Email;
 Comment=GNU Emacs is an extensible, customizable text editor - and more
-Exec=emacs -f message-mailto %u
-# If you prefer to use emacsclient, use this instead
-#Exec=emacsclient -e '(message-mailto "%u")'
 Icon=emacs
 Name=Emacs (Mail)
 MimeType=x-scheme-handler/mailto;
 NoDisplay=false
 Terminal=false
 Type=Application
+
+Exec=emacs -f message-mailto %u
+# # If you prefer to use emacsclient, use this instead:
+# Exec=sh -c 'emacsclient --alternate-editor= --display="$DISPLAY" --eval "(message-mailto \"%u\")"'
+# Actions=new-window;new-instance;
+
+# [Desktop Action new-window]
+# Name=New Window
+# Exec=emacsclient --alternate-editor= --create-frame --eval '(message-mailto "%u")'
+
+# [Desktop Action new-instance]
+# Name=New Instance
+# Exec=emacs -f message-mailto %u