Adjust width of focused window with keyboard

[dungle-scrubs]

I've just started using yabai and am really liking it so far. In my efforts to go mouseless, I find the urge to use my keyboard arrows plus a modifier to change the width of the window in focus by a few % per tap. Often, when I toss two windows on the screen at 50% each, I quickly realize the ideal percentages are a little different and want to quickly adjust, so I need to reach over for the mouse and drag.

Is this something that can currently be done? Or perhaps it would be a good feature candidate?

Cheers

[bustinbung]

You can use a combination of skhd and yabai's built in window resizing commands.

Here's my skhd config that resizes the master window with h and l and the split window with u and d:

# skhdrc #

# change master width
lalt + shift - h : ~/.config/skhd/resizeWindow.sh -h
lalt + shift - l : ~/.config/skhd/resizeWindow.sh -l

# change split height
lalt + shift - u : ~/.config/skhd/resizeWindow.sh -u
lalt + shift - d : ~/.config/skhd/resizeWindow.sh -d

# resizeWindow.sh #

#!/bin/bash

WINDOW_RESIZE_AMOUNT=30

if [[ $1 = "-d" ]]; then
    SPLIT_CHILD=$(yabai -m query --windows --window | jq '.["split-child"]')

    if [[ $SPLIT_CHILD == "\"first_child\"" ]]; then
        yabai -m window --resize bottom:0:$WINDOW_RESIZE_AMOUNT
    fi

    if [[ $SPLIT_CHILD == "\"second_child\"" ]]; then
        yabai -m window --resize top:0:$WINDOW_RESIZE_AMOUNT
    fi
elif [[ $1 = "-u" ]]; then
    SPLIT_CHILD=$(yabai -m query --windows --window | jq '.["split-child"]')

    if [[ $SPLIT_CHILD == "\"first_child\"" ]]; then
        yabai -m window --resize bottom:0:-$WINDOW_RESIZE_AMOUNT
    fi

    if [[ $SPLIT_CHILD == "\"second_child\"" ]]; then
        yabai -m window --resize top:0:-$WINDOW_RESIZE_AMOUNT
    fi
elif [[ $1 = "-h" ]]; then
    yabai -m window `yabai -m query --spaces --space | jq '."first-window"'` --resize right:-$WINDOW_RESIZE_AMOUNT:0
elif [[ $1 = "-l" ]]; then
    yabai -m window `yabai -m query --spaces --space | jq '."first-window"'` --resize right:$WINDOW_RESIZE_AMOUNT:0
else
    echo "Invalid flag entered."
fi

[dungle-scrubs]

Thank you, that's very helpful!

[Pe8er]

@bustinbung thanks for the awesome script! I wanted to simplify it a bit and came up with the following:

#!/bin/bash

WINDOW_RESIZE_AMOUNT=100
WINDOW=$(yabai -m query --windows --window)
SPLIT_TYPE=$(echo $WINDOW | jq -r '."split-type"')

resize() {
    if [[ $SPLIT_TYPE == "vertical" ]]; then
        echo "right:$1$WINDOW_RESIZE_AMOUNT:0"
    else
        echo "bottom:0:$1$WINDOW_RESIZE_AMOUNT"
    fi
}

if [[ $1 = "decrease" ]]; then
    yabai -m window --resize $(resize "-")
elif [[ $1 = "increase" ]]; then
    yabai -m window --resize $(resize "")
else
    echo "Invalid flag entered."
fi

I call it from Alfred with ~/.config/yabai/resize_window.sh decrease or increase.

However, I noticed that using it makes Yabai sluggish…do you see anything wrong with the script or do you think I should look elsewhere?

[bustinbung]

I don't know much about performance or bash scripting, just enough to get by. It looks fine to me, but might have something to do with window animations (if you have that enabled) or command substitution. Maybe try running yabai in the terminal and add an echo statement to help debug? Other than that, I don't really have any ideas.