Window resizing with "ppt" unit seems relative instead of absolute

[Delgan]

Hi.

I observed a different behavior than i3 when resizing non-floating windows with percentage point values.

For both i3 and Sway my config is basically:

mode "resize" {
        bindsym $left       resize shrink width  10 px or 10 ppt
        bindsym $down       resize shrink height  10 px or 10 ppt
        bindsym $up         resize grow height  10 px ot 10 ppt
        bindsym $right      resize grow width 10 px or 10 ppt

        bindsym Left        resize shrink width 10 px or 10 ppt
        bindsym Down        resize shrink height 10 px or 10 ppt
        bindsym Up          resize grow height 10 px or 10 ppt
        bindsym Right       resize grow width 10 px or 10 ppt

        bindsym Return mode "default"
        bindsym Escape mode "default"
        bindsym $mod+r mode "default"
}

bindsym $mod+r mode "resize"

It seems i3 transforms 10 ppt to "10% of screen size" while using Sway, it's "10% of container"?

resize-i3.mp4

resize-sway.webm

Am I the only one experiencing this behavior?

~ $ i3 --version
i3 version 4.22 (2023-01-02) © 2009 Michael Stapelberg and contributors
~ $ sway --version
sway version 1.8.1

[Rintse]

I wrote a little script that mimics the i3 behaviour before I found this issue.
I'll post it here for reference:

#!/bin/bash
shrink_or_grow=${1}
direction=${2}
percent=${3}

if [ "${percent}" -lt 0 ] || [ "${percent}" -gt 100 ]; then
    echo "Invalid percentage"
fi

reference=$(swaymsg -t get_workspaces | jq '.[] | select(.focused==true)')
reference_dir=$(echo "${reference}" | jq -r '.layout')

if [ "$reference_dir" == "splitv" ]; then
    reference_size=$(echo "${reference}" | jq '.rect.height')
elif [ "$reference_dir" == "splith" ]; then
    reference_size=$(echo "${reference}" | jq '.rect.width')
else
    echo "Reference is not a split"
    exit 1
fi

px_count=$(echo "${reference_size} / 100 * ${percent}" | bc -l | xargs printf %.0f)
swaymsg resize "${shrink_or_grow} ${direction} ${px_count}" px

You can also resize based on the parent container's size by changing the reference variable:

# Resize relative to the parent container
reference=$(swaymsg -t get_tree | jq '
    .. 
    | select(.type?) 
    | . as $parent
    | .nodes 
    | select(any(.[]; .focused == true))
    | $parent'
)