#!/bin/bash

# Setup keyboard window tiling for Elementary OS

# Instructions:
# 1. wget or otherwise download this shell script
# 2. Run script as sudo: sudo bash quicktile_elementary_os.sh
# 3. Log out and log back in.

# Installs quicktile (https://github.com/ssokolow/quicktile) 
# for Elementary OS 5.1 Hera (https://elementary.io/)
# based on Ubuntu 18.04 LTS (http://releases.ubuntu.com/18.04/)
# with required hacky fixes to make it work properly.

# Install quicktile dependencies

sudo apt-get install -y python python-gtk2 python-xlib python-dbus python-setuptools

# One dependency (python-wnck) that is python 2.7 is no longer available for 18.04,
# so need to temporarily add 17.10 Ubuntu repos and install it

sudo sh -c "echo 'deb http://old-releases.ubuntu.com/ubuntu/ artful main restricted universe multiverse' > /etc/apt/sources.list.d/wnck.list"
sudo sh -c "echo 'deb http://old-releases.ubuntu.com/ubuntu/ artful-updates main restricted universe multiverse' >> /etc/apt/sources.list.d/wnck.list"
sudo sh -c "echo 'deb http://old-releases.ubuntu.com/ubuntu/ artful-backports main restricted universe multiverse' >> /etc/apt/sources.list.d/wnck.list"
sudo sh -c "echo 'deb http://old-releases.ubuntu.com/ubuntu artful-security main restricted universe multiverse' >> /etc/apt/sources.list.d/wnck.list"
sudo apt update
sudo apt install-y python-wnck

# Clean up some junk so you don't end up with other 17.10 dependencies
sudo rm /etc/apt/sources.list.d/wnck.list
sudo rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
sudo apt-get update 
sudo apt-get -y upgrade # might as well
sudo apt-get clean
sudo apt-get autoclean
sudo apt-get autoremove

# Now install quicktile
sudo pip2 install https://github.com/ssokolow/quicktile/archive/master.zip

# Get rid of error message about libcanberra-gtk something something
sudo apt install -y libcanberra-gtk-module

# Get rid of error message: Gtk-Message: 11:39:02.795: Failed to load module "pantheon-filechooser-module"
# There are numerous posts about this: Here's one example: https://askubuntu.com/questions/684169/gtk-message-failed-to-load-module-pantheon-filechooser-module
echo "export GTK_MODULES=:gail:atk-bridge" >> ~/.bashrc # removes ":pantheon-filechooser-module" which isn't needed
source ~/.bashrc

# Get rid of error message about pixbuf
sudo apt-get install -y gnome-themes-standard

# Fix stupid Pantheon/Elementary issue where Elementary apps have huge invisible window borders around them with quicktile
# As a side-benefit, this also fixes the same issue if you want to use i3 (for example, regolith-desktop) as a window
# manager on top of Elementary OS. I personally switch back and forth between i3 and Pantheon with Elementary as the base.

# Backup config file
cd /usr/share/themes/elementary/gtk-3.0/
sudo cp gtk-widgets.css gtk-widgets.css.bak

# Replace old section with new section
printf 'decoration {
    border-radius: 4px 4px 0 0;
    box-shadow:
        0 0 0 1px @decoration_border_color,
        0 14px 28px rgba(0, 0, 0, 0.35),
        0 10px 10px rgba(0, 0, 0, 0.22);
    margin: 12px;
}' > /tmp/old.txt

printf 'decoration {
	box-shadow: none;
	border: none;
	padding: 0;
	margin: 1;
}' > /tmp/new.txt

contents=$(< gtk-widgets.css)
old=$(< /tmp/old.txt)
new=$(< /tmp/new.txt)

# Replace conf file with new text instead of old
echo "${contents/$old/$new}" > /tmp/gtk-widgets.css
sudo mv /tmp/gtk-widgets.css /usr/share/themes/elementary/gtk-3.0/

# Clean up tmp files
rm /tmp/old.txt /tmp/new.txt

cd ~/

# Run quicktile once to generate config
quicktile

# Remove "KP_" from keyboard shortcuts in ~/.config/quicktile.cfg
# Because I don't have a numeric keypad
# I'll leave all other shortcuts as defaults, just using top number keys instead
sed -i 's/^KP\_//g' ~/.config/quicktile.cfg

# Oh, and a quick fix because it doesn't like the "Enter" shortcut for monitor-switch
# now that it's not the keypad enter button
# Now ctrl+alt+space switches the window to another monitor
sed -i 's/^Enter /space /g' ~/.config/quicktile.cfg

# Phew. Almost done!
# Just need to make quicktile startup automatically when you log in
printf '
[Desktop Entry]
Name[en_US]=quicktile
Comment[en_US]=quicktile --daemonize
Exec=quicktile --daemonize
Icon=application-default-icon
X-GNOME-Autostart-enabled=true
Type=Application' > ~/.config/autostart/quicktile.desktop

# Now log out and log back in and tiling should be working