#!/bin/python3

# Sets side (horizontal) gaps wide enough
# that a single window in the middle would
# have aspect ratio roughly that of a4 paper.

import i3ipc

# Initiate library.
i3 = i3ipc.Connection()

# Dimensions of focused workspace.
dim_ws = i3.get_tree().find_focused().workspace().rect
ws_width = dim_ws.width
ws_height = dim_ws.height

# Calculate approprite gap size (depends on monitor aspect ratio).
gap_size = (ws_width - (ws_height / 1.3)) // 2

# Toggle gaps.
# Widescreen monitors turned sideways could cause problems.
if gap_size > 0:
    i3.command('gaps horizontal current toggle {}'.format(gap_size))