2026-08-03 14:30:55 +02:00
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#!/bin/sh
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# Triggered by <Control><Alt>n
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# as defined in [org/gnome/settings-daemon/plugins/media-keys]
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# in ~/.config/gnome-settings/key-bindings.ini
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#
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# Night Light control:
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#
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# - <Control><Alt>n => "when" toggle
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# + "Force" the screen to be warm right now!
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# (Turns Night Light on if it was off, and keeps it on all day)
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# + "Un-force" the Night Light into the local evening schedule
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# - <Alt><Shift>n => "if" toggle
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# Plain on/off switch for the Night Light feature
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2026-08-14 20:45:34 +02:00
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# - <Alt><Shift>Left => Make the screen cooler
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# - <Alt><Shift>Right => Make the screen warmer, and "force" warmness
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2026-08-03 14:30:55 +02:00
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#
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#
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# State machine:
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#
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2026-08-14 20:45:34 +02:00
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# +-----------------------+-----------------------+-----------------------+-----------------------+-----------------------+
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# | | "IF" toggle | "WHEN" toggle | "make COOLER" | "make WARMER" |
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# | Current STATE | <Alt><Shift>n | <Control><Alt>n | <Alt><Shift>Left | <Alt><Shift>Right |
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# | | | | | |
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# +-----------------------+-----------------------+-----------------------+-----------------------+-----------------------+
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# +-----------------------+-----------------------+-----------------------+-----------------------+-----------------------+
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# | DISABLED | ENABLE | enabled | still disabled | enabled |
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# | + scheduled | + still scheduled | + FORCED on | + still scheduled | + FORCED on |
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# | => no tint | => no or set tint | => set tint | => still no tint | => set tint |
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# | | based on time N? | | N! | *1 |
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# +-----------------------+-----------------------+-----------------------+-----------------------+-----------------------+
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# | DISABLED | ENABLE | enabled | still disabled | enabled |
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# | + forced on | + still forced | + still FORCED on | + still forced | + still FORCED on |
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# | => no tint | => set tint | => set tint | => still no tint | => set tint |
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# | | | | N! | *1 |
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# +-----------------------+-----------------------+-----------------------+-----------------------+-----------------------+
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# | enabled | DISABLE | still enabled | still enabled | still enabled |
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# | + SCHEDULED (day) | + still scheduled | + FORCED on | + still scheduled | + FORCED on |
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# | => no tint yet | => still no tint | => set tint | => still no tint | => set tint |
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# | | N! | | N! | *1 |
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# +-----------------------+-----------------------+-----------------------+-----------------------+-----------------------+
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# | enabled | DISABLE | still enabled | still enabled | still enabled |
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# | + SCHEDULED (ramping) | + still scheduled | + FORCED on | + still scheduled | + FORCED on |
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# | => some tint already | => no tint | => set tint | => no change in tint | => set tint |
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# | | | | N! | |
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# +-----------------------+-----------------------+-----------------------+-----------------------+-----------------------+
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# | enabled | DISABLE | still enabled | still enabled | still enabled |
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# | + SCHEDULED (night) | + still scheduled | + FORCED on | + still scheduled | + FORCED on |
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# | => set tint | => no tint | => set tint | => LESS tint | => MORE tint |
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# | | | N! | *2 N? | N? |
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# +-----------------------+-----------------------+-----------------------+-----------------------+-----------------------+
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# | enabled | DISABLE | still enabled | still enabled | still enabled |
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# | + FORCED on | + still forced on | + back to SCHEDULED | + still forced on | + still forced on |
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# | => set tint | => no tint | => no or set tint | => LESS tint | => MORE tint |
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# | | | based on time N? | *2 N? | N? |
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# +-----------------------+-----------------------+-----------------------+-----------------------+-----------------------+
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# Legend:
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# - N! => A notification is shown for sure because there is no visible change on the screen
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# - N? => A notification is shown if there was no visible change on the screen
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# - *1 => The temperature is snapped to 2200K to ensure a visible effect
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# - *2 => The tint is turned off entirely when stepping over the maximum temperature
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#
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# Notes:
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# - The main state property or state change is shown in CAPS
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# - Steps range from 1200K (warmest) to 4700K (coolest),
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# which is a bit more than the 1700K to 4700K in `gnome-control-center`
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# - If the range is already exhausted, so that the tint does not change, a notification is shown
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# - A 03:00 timer re-enables the Night Light feature and puts it back on the automatic schedule
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# with the `$_DEFAULT_TEMPERATURE` set
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#
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2026-08-03 14:30:55 +02:00
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set -eu
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notify() {
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ID_FILE="${XDG_RUNTIME_DIR}/night-light-notification-id"
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_id=$(cat "$ID_FILE" 2>/dev/null || true)
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if [ -n "$_id" ]; then
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notify-send -p -t 5000 --replace-id="$_id" "Night Light" "$1" > "$ID_FILE" || rm -f "$ID_FILE"
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else
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notify-send -p -t 5000 "Night Light" "$1" > "$ID_FILE" || rm -f "$ID_FILE"
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fi
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}
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Schema=org.gnome.settings-daemon.plugins.color
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active_before=$(gdbus call --session \
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--dest org.gnome.SettingsDaemon.Color \
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--object-path /org/gnome/SettingsDaemon/Color \
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--method org.freedesktop.DBus.Properties.Get \
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org.gnome.SettingsDaemon.Color NightLightActive)
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2026-08-14 20:45:34 +02:00
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applied=$(gdbus call --session \
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--dest org.gnome.SettingsDaemon.Color \
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--object-path /org/gnome/SettingsDaemon/Color \
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--method org.freedesktop.DBus.Properties.Get \
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org.gnome.SettingsDaemon.Color Temperature \
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| sed -E 's/.*uint32 ([0-9]+).*/\1/')
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2026-08-03 14:30:55 +02:00
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automatic=$(gsettings get $Schema night-light-schedule-automatic)
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enabled=$(gsettings get $Schema night-light-enabled)
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2026-08-14 20:45:34 +02:00
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target=$(gsettings get $Schema night-light-temperature | awk '{print $2}')
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2026-08-03 14:30:55 +02:00
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if [ "$automatic" = "true" ] || [ "$enabled" = "false" ]; then
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# Force "Night Light" enabled, enabling it if needed
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gsettings set $Schema night-light-enabled true
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gsettings set $Schema night-light-schedule-automatic false
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gsettings set $Schema night-light-schedule-from 0.0
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gsettings set $Schema night-light-schedule-to 24.0
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2026-08-14 20:45:34 +02:00
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if [ "$active_before" = "(<true>,)" ] && [ "$automatic" = "true" ] \
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&& [ $((applied - target)) -le 300 ]; then
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2026-08-03 14:30:55 +02:00
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notify "is now forced to stay on and no longer on an automatic schedule"
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fi
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else
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# Back to the live location's schedule
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gsettings set $Schema night-light-schedule-automatic true
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gsettings set $Schema night-light-schedule-from 18.0
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gsettings set $Schema night-light-schedule-to 6.0
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if [ "$active_before" = "(<true>,)" ]; then
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# Give the settings daemon a moment to recompute "NightLightActive"
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sleep 0.1
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active_after=$(gdbus call --session \
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--dest org.gnome.SettingsDaemon.Color \
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--object-path /org/gnome/SettingsDaemon/Color \
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--method org.freedesktop.DBus.Properties.Get \
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org.gnome.SettingsDaemon.Color NightLightActive)
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if [ "$active_after" = "(<true>,)" ]; then
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notify "is still on because of an automatic schedule"
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fi
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fi
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fi
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