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fix(emacs): assess if there are open frames of the expected type

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This change looks at the frame type of the open frames ('framep) and
looks if they're of the type requested based on the arguments passed
to emacsclient (-nw/-t/--tty require tty frames, otherwise we need
graphical frames).

NOTE: this code considers anything different than t as graphical
terminals, including MS-DOS types (pc). I don't have such a setup
to test if this is correct.
This commit is contained in:
Marc Cornellà 2021-09-28 12:30:29 +02:00
parent 27dcca5967
commit 2acae3797b
1 changed files with 12 additions and 2 deletions
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14
plugins/emacs/emacsclient.sh
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@ -1,10 +1,20 @@
#!/bin/sh
emacsfun() {
local frames="$(emacsclient --alternate-editor "" -n -e "(length (frame-list))" 2>/dev/null)"
local cmd frames
# Build the Emacs Lisp command to check for suitable frames
# See https://www.gnu.org/software/emacs/manual/html_node/elisp/Frames.html#index-framep
case "$*" in
*-t*|*--tty*|*-nw*) cmd="(memq 't (mapcar 'framep (frame-list)))" ;; # if != nil, there are tty frames
*) cmd="(delete 't (mapcar 'framep (frame-list)))" ;; # if != nil, there are graphical terminals (x, w32, ns)
esac
# Check if there are suitable frames
frames="$(emacsclient -a '' -n -e "$cmd" 2>/dev/null)"
# Only create another X frame if there isn't one present
if [ -z "$frames" -o "$frames" -lt 2 ]; then
if [ -z "$frames" -o "$frames" = nil ]; then
emacsclient --alternate-editor "" --create-frame "$@"
return $?
fi