#! /bin/bash

set -e

launch_then_killall() {
    local -r program="$1"
    local -r timeout="${2:-1}" # 2nd arg or default to 1.

    "$program"&
    sleep "$timeout"
    killall "$program"
}

dpi_scale() {
    # IDK what magic is at work here, but launching mate-appearance-properties
    # does the job better than setting scaling variables.
    # TODO Get to the bottom of how it works and replicate directly.
    launch_then_killall 'mate-appearance-properties' 1

    # GDK 3 (GTK 3)
    # https://wiki.archlinux.org/index.php/HiDPI#GDK_3_(GTK_3)
    #export GDK_SCALE=2

    # QT
    # https://wiki.archlinux.org/index.php/HiDPI#Qt_5
    # https://doc.qt.io/qt-5/highdpi.html
    # https://blog.qt.io/blog/2016/01/26/high-dpi-support-in-qt-5-6/
    #export QT_SCALE_FACTOR=2  # Causes qutebrowser UI fonts to have large gaps.
    #export QT_FONT_DPI=192  # Scales qutebrowser UI fonts as expected.
}

launch_common() {
    xbindkeys
    xscreensaver &
    dpi_scale&
    #mpd --kill || true
    #mpd
    for script in ~/.xlaunch.d/*; do
        "$script"
    done
}

launch_specialized() {
    # XXX dunst lazily started by dbus
    local -r scripts_dir=~/.xlaunch.d."$(hostname)"

    if test -d "$scripts_dir"
    then
        for script in "$scripts_dir"/*; do
            "$script"
        done
    else
        printf '[error] scripts_dir not found: %s\n' "$scripts_dir" >&2
    fi
}

launch_common
launch_specialized

exec dwm