Use percentage-based step for keyboard backlight brightness (#5135)
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@@ -23,14 +23,19 @@ fi
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max_brightness="$(brightnessctl -d "$device" max)"
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current_brightness="$(brightnessctl -d "$device" get)"
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# Calculate step as one unit (keyboards typically have discrete levels like 0-3).
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# Calculate step as 10% of max brightness. Keyboards with many levels (e.g. 512)
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# need larger steps; keyboards with few levels (e.g. 3) fall back to step=1.
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step=$(( max_brightness / 10 ))
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(( step < 1 )) && step=1
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if [[ $direction == "cycle" ]]; then
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new_brightness=$(( (current_brightness + 1) % (max_brightness + 1) ))
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new_brightness=$(( current_brightness + step ))
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(( new_brightness > max_brightness )) && new_brightness=0
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elif [[ $direction == "up" ]]; then
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new_brightness=$((current_brightness + 1))
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new_brightness=$(( current_brightness + step ))
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(( new_brightness > max_brightness )) && new_brightness=$max_brightness
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else
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new_brightness=$((current_brightness - 1))
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new_brightness=$(( current_brightness - step ))
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(( new_brightness < 0 )) && new_brightness=0
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fi
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