insta360-link-tools/kde/install-shortcuts.sh

#!/usr/bin/env bash
#
# install-shortcuts.sh - register global hotkeys for the Insta360 Link under
# KDE Plasma.
#
# Plasma binds global shortcuts to application entries, so for each action
# this installs a .desktop file and the matching entry in kglobalshortcutsrc.
# The shortcuts then work from anywhere in the session, on Wayland as well as
# X11, which OBS's own hotkeys do not under Wayland.
#
# Usage:
#   ./install-shortcuts.sh --dry-run     show what would change, touch nothing
#   ./install-shortcuts.sh               install
#   ./install-shortcuts.sh --list        show what is currently registered
#   ./install-shortcuts.sh --uninstall   remove everything it installed
#
# Edit the BINDINGS table below to change the keys or the actions. Re-running
# the script is safe and applies the new table.

set -euo pipefail

# Degrees moved by one press of a directional shortcut.
NUDGE=${NUDGE:-5}

# id | key sequence | linkctl-macro arguments | human label
#
# Meta+Alt is used because Plasma leaves that combination largely free.
# Anything Plasma already owns is reported as a conflict rather than stolen.
BINDINGS=(
    "tracking-toggle|Meta+Alt+T|tracking toggle|Insta360: Toggle AI tracking"
    "tracking-on|Meta+Alt+1|tracking on|Insta360: AI tracking on"
    "tracking-off|Meta+Alt+0|tracking off|Insta360: AI tracking off"
    "preset-home|Meta+Alt+H|preset load home|Insta360: Load home preset"
    "center|Meta+Alt+C|center|Insta360: Recenter gimbal"
    # Directional nudges. kglobalaccel fires once per keypress and gives no
    # press-and-hold, so each of these is a discrete step rather than smooth
    # motion. For continuous movement use the Plasma widget or a gamepad.
    "pan-left|Meta+Alt+Left|left $NUDGE|Insta360: Pan left"
    "pan-right|Meta+Alt+Right|right $NUDGE|Insta360: Pan right"
    "tilt-up|Meta+Alt+Up|up $NUDGE|Insta360: Tilt up"
    "tilt-down|Meta+Alt+Down|down $NUDGE|Insta360: Tilt down"
)

# The entries are visible by default: KApplicationTrader skips NoDisplay
# services, so hiding them also hides them from the Shortcuts page in System
# Settings. Set HIDE_FROM_MENU=1 to keep the launcher clean at that cost.
HIDE_FROM_MENU=${HIDE_FROM_MENU:-0}

readonly APPDIR="${XDG_DATA_HOME:-$HOME/.local/share}/applications"
readonly PREFIX="linkctl-"
SCRIPT_DIR=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)
readonly SCRIPT_DIR

MACRO=${MACRO:-$SCRIPT_DIR/../bin/linkctl-macro}
DRY_RUN=0
MODE=install

die() { printf 'error: %s\n' "$*" >&2; exit 1; }
info() { printf '%s\n' "$*"; }
run() {
    if (( DRY_RUN )); then
        printf '  would run: %s\n' "$*"
    else
        "$@"
    fi
}

# Like run(), but discards the command's own chatter. Kept separate so that a
# redirect never swallows the dry-run description.
run_quiet() {
    if (( DRY_RUN )); then
        printf '  would run: %s\n' "$*"
    else
        "$@" >/dev/null 2>&1
    fi
}

# Plasma 6 ships the *6 tools, Plasma 5 the *5 ones.
detect_plasma() {
    if command -v kwriteconfig6 >/dev/null 2>&1; then
        KWRITE=kwriteconfig6; KREAD=kreadconfig6
        SYCOCA=kbuildsycoca6; PLASMA=6
    elif command -v kwriteconfig5 >/dev/null 2>&1; then
        KWRITE=kwriteconfig5; KREAD=kreadconfig5
        SYCOCA=kbuildsycoca5; PLASMA=5
    else
        die "neither kwriteconfig6 nor kwriteconfig5 found; is this a KDE Plasma session?"
    fi
}

desktop_file() { printf '%s/%s%s.desktop\n' "$APPDIR" "$PREFIX" "$1"; }
desktop_name() { printf '%s%s.desktop\n' "$PREFIX" "$1"; }

write_desktop() {
    local id=$1 args=$2 label=$3 keys=$4 path
    path=$(desktop_file "$id")
    if (( DRY_RUN )); then
        printf '  would write %s\n' "$path"
        printf '    Exec=%s %s\n' "$MACRO" "$args"
        printf '    X-KDE-Shortcuts=%s\n' "$keys"
        return
    fi
    local nodisplay=false
    (( HIDE_FROM_MENU )) && nodisplay=true
    # X-KDE-Shortcuts is where kglobalacceld reads an entry's *default*
    # shortcut from, so declaring it here is what makes the binding show up in
    # System Settings instead of "No default shortcuts".
    cat > "$path" <<EOF
[Desktop Entry]
Type=Application
Name=$label
Comment=Insta360 Link control via linkctl
Exec=$MACRO $args
Icon=camera-web
Terminal=false
NoDisplay=$nodisplay
Categories=AudioVideo;
X-KDE-Shortcuts=$keys
X-KDE-GlobalAccel-CommandShortcut=true
StartupNotify=false
EOF
    info "  wrote $path"
}

# Warn if some other action already owns this key sequence.
check_conflict() {
    local id=$1 keys=$2 me existing
    me=$(desktop_name "$id")
    existing=$(grep -rl --include=kglobalshortcutsrc -F "$keys" \
        "${XDG_CONFIG_HOME:-$HOME/.config}" 2>/dev/null || true)
    [[ -z $existing ]] && return 0
    local owner
    owner=$(grep -B100 -F "$keys" "$existing" 2>/dev/null \
        | grep -oE '^\[[^]]+\](\[[^]]+\])?' | tail -1 || true)
    if [[ -n $owner && $owner != *"$me"* ]]; then
        printf '  note: %s may already be bound by %s\n' "$keys" "$owner"
    fi
}

stop_daemon() {
    # Write while the daemon is down: it rewrites kglobalshortcutsrc on exit
    # and would otherwise discard these entries.
    if (( PLASMA == 6 )); then
        run systemctl --user stop plasma-kglobalaccel.service 2>/dev/null \
            || run kquitapp6 kglobalacceld 2>/dev/null || true
    else
        run kquitapp5 kglobalaccel5 2>/dev/null || true
    fi
}

start_daemon() {
    if (( PLASMA == 6 )); then
        if ! run systemctl --user start plasma-kglobalaccel.service 2>/dev/null; then
            run kstart kglobalacceld 2>/dev/null \
                || info "  could not restart kglobalacceld; log out and back in to apply"
        fi
    else
        run kstart5 kglobalaccel5 2>/dev/null \
            || info "  could not restart kglobalaccel5; log out and back in to apply"
    fi
}

do_install() {
    [[ -x $MACRO ]] || die "linkctl-macro not executable at $MACRO (set MACRO=/path)"
    MACRO=$(cd -- "$(dirname -- "$MACRO")" && pwd)/$(basename -- "$MACRO")

    info "Plasma $PLASMA detected; using $KWRITE"
    info "macro script: $MACRO"
    (( DRY_RUN )) && info "(dry run: nothing will be changed)"

    run mkdir -p "$APPDIR"

    info "Checking for conflicts:"
    local entry id keys args label
    for entry in "${BINDINGS[@]}"; do
        IFS='|' read -r id keys args label <<< "$entry"
        check_conflict "$id" "$keys"
    done

    info "Writing application entries:"
    for entry in "${BINDINGS[@]}"; do
        IFS='|' read -r id keys args label <<< "$entry"
        write_desktop "$id" "$args" "$label" "$keys"
    done

    info "Stopping the global shortcut daemon:"
    stop_daemon
    sleep 1

    info "Registering shortcuts:"
    for entry in "${BINDINGS[@]}"; do
        IFS='|' read -r id keys args label <<< "$entry"
        # _launch is a bare key sequence. Plasma 5 stored a
        # "keys,default,name" triplet here and Plasma 6 does not: it passes
        # the value straight to QKeySequence::fromString, so a triplet parses
        # to nothing and the shortcut silently never binds. Alternates are
        # separated by a tab, and "none" means unbound.
        run "$KWRITE" --file kglobalshortcutsrc \
            --group services --group "$(desktop_name "$id")" \
            --key _launch "$keys"
        info "  $keys -> linkctl $args"
    done

    info "Rebuilding the application cache:"
    run_quiet "$SYCOCA" --noincremental \
        || info "  $SYCOCA reported a problem (usually harmless)"

    info "Restarting the global shortcut daemon:"
    start_daemon

    if (( DRY_RUN )); then
        info "Dry run complete."
    else
        info ""
        info "Done. Check them under System Settings > Keyboard > Shortcuts,"
        info "searching for 'Insta360'. Test one with: $MACRO tracking toggle"
    fi
}

do_uninstall() {
    info "Removing shortcuts and application entries:"
    stop_daemon
    sleep 1
    local entry id keys args label path
    for entry in "${BINDINGS[@]}"; do
        IFS='|' read -r id keys args label <<< "$entry"
        run "$KWRITE" --file kglobalshortcutsrc \
            --group services --group "$(desktop_name "$id")" \
            --key _launch --delete
        path=$(desktop_file "$id")
        [[ -e $path ]] && run rm -f "$path" && info "  removed $path"
    done
    run_quiet "$SYCOCA" --noincremental || true
    start_daemon
    info "Done."
}

do_list() {
    local entry id keys args label value path dflt problems=0
    printf '%-20s %-12s %-14s %-12s %s\n' ACTION KEY _launch DEFAULT ENTRY
    for entry in "${BINDINGS[@]}"; do
        IFS='|' read -r id keys args label <<< "$entry"
        value=$("$KREAD" --file kglobalshortcutsrc \
            --group services --group "$(desktop_name "$id")" \
            --key _launch 2>/dev/null || true)
        path=$(desktop_file "$id")
        if [[ -r $path ]]; then
            dflt=$(sed -n 's/^X-KDE-Shortcuts=//p' "$path" | head -1)
        else
            dflt=""
        fi
        # A comma here means a Plasma 5 triplet, which Plasma 6 cannot parse.
        if [[ $value == *,* ]]; then
            problems=1
            value="$value  <-- INVALID"
        fi
        printf '%-20s %-12s %-14s %-12s %s\n' \
            "$id" "$keys" "${value:-<unset>}" "${dflt:-<none>}" \
            "$([[ -r $path ]] && echo present || echo MISSING)"
    done
    if (( problems )); then
        echo
        echo "A _launch value containing commas is the Plasma 5 format and never"
        echo "binds under Plasma 6. Re-run this script to rewrite them."
    fi
}

while [[ $# -gt 0 ]]; do
    case $1 in
        --dry-run|-n) DRY_RUN=1; shift ;;
        --uninstall)  MODE=uninstall; shift ;;
        --list|-l)    MODE=list; shift ;;
        -h|--help)
            # Print the header comment block, stopping at the first code line.
            awk 'NR>1 { if (!/^#/) exit; sub(/^# ?/, ""); print }' \
                "${BASH_SOURCE[0]}"
            exit 0 ;;
        *)            die "unknown option: $1" ;;
    esac
done

detect_plasma
case $MODE in
    install)   do_install ;;
    uninstall) do_uninstall ;;
    list)      do_list ;;
esac