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+# CHANGELOG
+
+## 0.6.0
+
+* Add a `show-sys-info` configuration option to show the username, hostname, &
+  current time above the password label/input. Additional configuration options
+  let you customize the font, size, color, & spacing. The output format is
+  currently fixed to `<user>@<hostname>` & `HH:MM` but may be customizable in
+  the future.
+* Add the ability to cycle between available sessions instead of only using
+  LightDM's `default-session`. Change sessions by pressing `<mod-key>+e`; a
+  `session-key` configuration option has been added to allow for customization.
+* Make every configuration option besides `greeter.user` optional. Any
+  undefined configuration options will fallback to their original values.
+* Add a `background-image-size` configuration option for scaling the background
+  image to fit or fill the screen.
+* Added a `y-pos` and `x-pos` configuration option to position the login window
+  relative to the screen.
+
+## v0.5.1
+
+* Fix crash when `password-alignment` option is missing from configuration
+  file.
+
+## v0.5.0
+
+* Allow setting the `password-alignment` option to `center`, in addition to
+  `left` or `right`.
+* Add a `password-border-radius` configuration option to set the border radius
+  of the password input.
+* Add a `password-character` configuration option to set the character used to
+  mask the entered password. `-1` specifies the default character, `0` hides
+  any entered text, & the first character is used for any other value.
+* Document how to make configuration file a symlink into home directories.
+* Improve error message when configuration file is unreadable.
+* Disable the password input while authenticating. This fixes a bug causing
+  lightdm to crash if the greeter tried authenticating before a previous
+  authentication attempt had completed.
+* Add a `password-input-width` configuration option to set the number of
+  characters that should fit in the password input. This is just a suggested
+  width - GTK may render a narrower input.
+* Ensure the mouse cursor is always hidden.
+* Add a `show-image-on-all-monitors` configuration option to display the
+  background image on every monitor instead of just the primary monitor.
+* Ignore any trailing whitespace in the `user`, `mod-key`, &
+  `password-alignment` configuration options.
+
+## v0.4.0
+
+* Add `password-border-color` & `password-border-width` options for customizing
+  the password input's border independently of the main window's border.
+* Fix default path to config file if not set by autotools.
+* Add `font-weight` & `font-style` options to customize the bolding &
+  italicizing of all text.
+* Use the alternatives system for Debian-based builds.
+* Add a `password-alignment` option to customize the alignment of the text in the
+  password input.
+* Add an `invalid-password-text` option to customize the wrong password error
+  text.
+
+## v0.3.4
+
+* Fix flashing of password input on start.
+* Fix background color on primary monitor when background image is not set.
+
+## v0.3.3
+
+* Fix background image aligment in multi-head configurations.
+* Fix builds with liblightdm v1.19.1 and below.
+* Fix customization of label colors.
+
+## v0.3.2
+
+* Fix linker flag build failures.
+* Fix silent failures when using old configuration files that are missing newly
+  added options.
+* Fix positioning main window in the center of the primary monitor for various
+  multi-head configurations.
+
+## v0.3.1
+
+* Fix white background when the `background-image` option is blank or not
+  present in the config file.
+
+## v0.3.0
+
+* Add a `password-label-text` option to customize the label text.
+* Add a `show-input-cursor` option to hide the input's cursor.
+* Add a `background-image` option to set a centered background image.
+* Change the default value of the `user` option to `CHANGE_ME`.
+
+## v0.2.0
+
+* Add a `font-size` option to the configuration file.
+* Fix start failure when no `user-session` is specified.
+* Fix color of password input's cursor.
+
+## v0.1.3
+
+* Fix a build issue with some compilers.
+
+## v0.1.2
+
+* Fix background color when using multiple monitors.
+
+## v0.1.1
+
+* Fix various warnings caused by the generated CSS.
+
+## v0.1.0
+
+* Initial release.
diff --git a/LICENSE b/LICENSE
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+++ b/LICENSE
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+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
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+
+  A patent license is "discriminatory" if it does not include within
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+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
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+to collect a royalty for further conveying from those to whom you convey
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+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
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+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
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+be similar in spirit to the present version, but may differ in detail to
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+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
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+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
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+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
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+to choose that version for the Program.
+
+  Later license versions may give you additional or different
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+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
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+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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+SUCH DAMAGES.
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+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
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+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/Makefile.am b/Makefile.am
new file mode 100644
index 0000000..dff5d17
--- /dev/null
+++ b/Makefile.am
@@ -0,0 +1,60 @@
+# Global Options
+AUTOMAKE_OPTIONS = \
+				foreign # Disable requirement for README, AUTHORS, COPYING
+
+AM_CFLAGS = -g -Wall -O3 --std=c11 -Wextra -Werror --std=c11 -pedantic \
+			-Wno-unused-parameter -Wfloat-equal -Wundef -Wshadow      \
+			-Wpointer-arith -Wcast-align -Wstrict-prototypes          \
+			-Wstrict-overflow=5 -Wwrite-strings -Waggregate-return    \
+			-Wswitch-enum -Wconversion -Wunreachable-code -Wformat=2  \
+			-Winit-self                                               \
+			-ftrapv -fverbose-asm \
+			-DCONFIG_FILE=\""$(sysconfdir)/lightdm/lightdm-mini-greeter.conf"\"
+
+
+# Packaging
+EXTRA_DIST = \
+			autogen.sh
+
+DISTCLEANFILES = \
+			aclocal.m4
+
+MAINTAINERCLEANFILES = \
+					Makefile.in \
+					compile \
+					defines.h.in \
+					configure \
+					depcomp \
+					install-sh \
+					missing
+
+
+# Data Files
+xgreetersdir = $(datadir)/xgreeters
+dist_xgreeters_DATA = data/lightdm-mini-greeter.desktop
+
+configdir = $(sysconfdir)/lightdm
+dist_config_DATA = data/lightdm-mini-greeter.conf
+
+
+# Greeter Executable
+greeterdir = $(bindir)
+greeter_PROGRAMS = lightdm-mini-greeter
+
+lightdm_mini_greeter_SOURCES = \
+							src/main.c \
+							src/app.c \
+							src/callbacks.c \
+							src/compat.c \
+							src/config.c \
+							src/focus_ring.c \
+							src/ui.c \
+							src/utils.c
+
+lightdm_mini_greeter_CFLAGS = \
+							$(AM_CFLAGS) \
+							$(GTK_CFLAGS) \
+							$(LIGHTDM_CFLAGS)
+lightdm_mini_greeter_LDADD = \
+							$(GTK_LIBS) \
+							$(LIGHTDM_LIBS)
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..2a1a183
--- /dev/null
+++ b/README.md
@@ -0,0 +1,235 @@
+# Mini-Greeter
+
+[![AUR package](https://repology.org/badge/version-for-repo/aur/lightdm-mini-greeter.svg)](https://aur.archlinux.org/packages/lightdm-mini-greeter) [![Codacy Badge](https://app.codacy.com/project/badge/Grade/a1c58074072542be8ea60d1bf14863fc)](https://www.codacy.com/gh/prikhi/lightdm-mini-greeter/dashboard)
+
+A minimal but highly configurable single-user GTK3 greeter for LightDM.
+
+Inspired by the SLiM Display Manager & LightDM GTK3 Greeter.
+
+
+## Goals
+
+Eventually this is will present a more customizable interface:
+
+* Randomized Background Wallpapers
+* Configurable language/session info? (lightdm provides this already?)
+* Handle GdkDisplay's `monitor-added` & `monitor-removed` signals
+
+[Open Feature Requests](http://bugs.sleepanarchy.com/projects/mini-greeter/issues/)
+
+
+## Current Status
+
+Right now you can:
+
+* log in
+* hide the `Password:` label & customize the text
+* hide the password input's cursor
+* show the user, hostname, & current time
+* set the password masking character
+* set the size of the login window, the font, & every color
+* set & scale a background image
+* use modifiable hotkeys to cycle through sessions or trigger a shutdown,
+  restart, hibernate, or suspend
+* reposition window on the x or y axis
+
+![A screen with a dark background and a single password input box in the center](https://raw.githubusercontent.com/prikhi/lightdm-mini-greeter/refs/heads/master/screenshot.png "Mini Greeter Screenshot")
+
+
+## Install
+
+### Arch Linux
+
+Install the [lightdm-mini-greeter package][aur-package] from the Arch User
+Repository:
+
+```sh
+yay -S lightdm-mini-greeter
+```
+
+### Gentoo Linux
+
+Emerge the [lightdm-mini-greeter package][gentoo-package]:
+
+```sh
+emerge x11-misc/lightdm-mini-greeter
+```
+
+### NixOS
+
+Enable & configure the greeter & default session in your `configuration.nix`:
+
+```nix
+{
+    services.xserver = {
+        enable = true;
+        displayManager.lightdm.greeters.mini = {
+            enable = true;
+            user = "your-username";
+            extraConfig = ''
+                [greeter]
+                show-password-label = false
+                [greeter-theme]
+                background-image = ""
+            '';
+        };
+        # Optionally, set a default session
+        windowManager = {
+            default = "awesome";
+            awesome.enable = true;
+        };
+    };
+}
+```
+
+Then rebuild & switch your configuration with `nixos-rebuild switch`.
+
+### Debian
+
+Debian packages for the latest `stable` branch are available on the
+[Releases][releases] page.
+
+You can use `debhelper` to build the package yourself:
+
+```sh
+sudo apt-get install build-essential automake pkg-config fakeroot debhelper \
+    liblightdm-gobject-dev libgtk-3-dev
+cd lightdm-mini-greeter
+fakeroot dh binary
+sudo dpkg -i ../lightdm-mini-greeter_*.deb
+```
+
+Note: on Ubuntu, you need `liblightdm-gobject-1-dev` instead of
+`liblightdm-gobject-dev`.
+
+### Manual
+
+You will need `automake`, `pkg-config`, `gtk+`, & `liblightdm-gobject` to build
+the project.
+
+Grab the source, build the greeter, & install it manually:
+
+```sh
+./autogen.sh
+./configure --datadir /usr/share --bindir /usr/bin --sysconfdir /etc
+make
+sudo make install
+```
+
+Run `sudo make uninstall` to remove the greeter.
+
+
+## Configure
+
+Once installed, you should specify `lightdm-mini-greeter` as your
+`greeter-session` in `/etc/lightdm/lightdm.conf`. If you have multiple Desktop
+Environments or Window Managers installed, you can specify the default
+selection by changing the `user-session` option as well(look in
+`/usr/share/xsessions` for possible values).
+
+Modify `/etc/lightdm/lightdm-mini-greeter.conf` to customize the greeter. At
+the very least, you will need to set the `user`. All other settings are
+optional & can be commented out or removed.
+
+You can test it out using LightDM's `test-mode`:
+
+    lightdm --test-mode -d
+
+Or with `dm-tool`:
+
+    dm-tool add-nested-seat
+
+Note: If you've added a `background-image` it will appear in this preview, but
+it may not appear during normal use if the file is not in directory which
+lightdm has permission to read(like `/etc/lightdm/`). A symlink into this
+location won't work.
+
+### Keyboard layout
+
+If your keyboard layout is loaded from your shell configuration files (`.bashrc`
+for example) then it might not be possible to type certain characters after
+installing lightdm-mini-greeter. You should consider modifying your
+[Xorg keyboard configuration](https://wiki.archlinux.org/index.php/Xorg/Keyboard_configuration#Using_X_configuration_files).
+
+For example for a french keyboard layout (azerty) you should edit/create
+`/etc/X11/xorg.conf.d/00-keyboard.conf` with at least the following options:
+
+```
+Section "InputClass"
+        Identifier "system-keyboard"
+        MatchIsKeyboard "on"
+        Option "XkbModel" "pc104"
+        Option "XkbLayout" "fr"
+EndSection
+```
+
+### Config file in $HOME
+
+You may wish to include your config file in their your home folder/dotfiles so
+it is version controlled & easily transferable between systems. This is
+possible, but on most systems, LightDM will not be able to read the
+configuration file due to permission errors.
+
+The proper way to handle this is to loosen the permissions on your home
+directory a bit.
+
+Start off by adding the `lightdm` user to your user's group:
+
+    sudo usermod -aG $(whoami) lightdm
+
+Allow your user group to read your home directory:
+
+    chmod g+rx ~
+
+Move the mini-greeter config file:
+
+    sudo mv /etc/lightdm/lightdm-mini-greeter.conf ~/.dotfiles/mini-greeter.conf
+
+And then add a symlink pointing to the file in your home directory:
+
+    sudo ln -s ~/.dotfiles/mini-greeter.conf /etc/lightdm/lightdm-mini-greeter.conf
+
+And finally log out & restart LightDM:
+
+    sudo systemctl restart lightdm
+
+If LightDM fails to start back up, check the greeter's log file(usually at
+`/var/log/lightdm/seat0-greeter.log`) for the following line:
+
+    Could not load configuration file: Permission denied
+
+If present, your permissions need further adjustment. You can test your
+permissions by attempting to read the file with `sudo`:
+
+    sudo -u lightdm cat ~/.dotfiles/mini-greeter.conf
+
+
+## Contribute
+
+You can submit feature requests, bug reports, pull requests or patches on
+either [github](http://github.com/prikhi/lightdm-mini-greeter) or
+[redmine](http://bugs.sleepanarchy.com/projects/mini-greeter/).
+
+If you like Mini-Greeter, please consider packaging it for your distribution.
+
+
+### Style
+
+* Use indentation and braces, 4 spaces - no tabs, no trailing whitespace.
+* Declare pointers like this: `char *p1, *p2;`, avoid: `char* p1;`.
+* Function braces should be on their own line.
+* If/else/while/do should always use braces and indentation.
+* Use `g_critical` for irrecoverable user errors, `g_error` for programming
+  errors.
+
+When in doubt, check surrounding code.
+
+
+## License
+
+GPL-3
+
+
+[aur-package]: https://aur.archlinux.org/packages/lightdm-mini-greeter/
+[gentoo-package]: https://packages.gentoo.org/packages/x11-misc/lightdm-mini-greeter
+[releases]: https://github.com/prikhi/lightdm-mini-greeter/releases
diff --git a/autogen.sh b/autogen.sh
new file mode 100755
index 0000000..68f4a17
--- /dev/null
+++ b/autogen.sh
@@ -0,0 +1,2 @@
+#!/bin/sh
+autoreconf -i
diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..a71ba3a
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,31 @@
+#                                               -*- Autoconf -*-
+# Process this file with autoconf to produce a configure script.
+
+AC_PREREQ([2.69])
+AC_INIT([lightdm-mini-greeter], [0.6.0], [http://github.com/prikhi])
+AC_CONFIG_SRCDIR([src/main.c])
+AC_CONFIG_HEADERS([defines.h])
+
+# Checks for programs.
+AC_PROG_CC
+AM_INIT_AUTOMAKE([subdir-objects])
+
+# Checks for libraries.
+PKG_CHECK_MODULES(GTK, gtk+-3.0 >= 3.14)
+PKG_CHECK_MODULES(LIGHTDM, liblightdm-gobject-1 >= 1.12)
+
+# Checks for header files.
+AC_CHECK_HEADERS([stdlib.h])
+
+# Checks for typedefs, structures, and compiler characteristics.
+
+# Checks for library functions.
+
+# Check if liblightdm is v1.19.1 or below for debian builds
+LDM_CHECK=$(pkg-config --max-version=1.19.1 liblightdm-gobject-1)
+AS_IF([test $? = 0],
+      [AC_DEFINE([LIGHTDM_1_19_1_LOWER], [], [Defined if liblightdm is version 1.19.1 or lower])]
+      )
+
+AC_CONFIG_FILES([Makefile])
+AC_OUTPUT
diff --git a/data/lightdm-mini-greeter.conf b/data/lightdm-mini-greeter.conf
new file mode 100644
index 0000000..51a0819
--- /dev/null
+++ b/data/lightdm-mini-greeter.conf
@@ -0,0 +1,114 @@
+# LightDM Mini Greeter Configuration
+#
+# To test your configuration out, run: lightdm --test-mode
+
+[greeter]
+# The user to login as.
+user = CHANGE_ME
+# Whether to show the password input's label.
+show-password-label = true
+# The text of the password input's label.
+password-label-text = Password:
+# The text shown when an invalid password is entered. May be blank.
+invalid-password-text = Invalid Password
+# Show a blinking cursor in the password input.
+show-input-cursor = true
+# The text alignment for the password input. Possible values are:
+# "left", "center", or "right"
+password-alignment = right
+# The number of characters that should fit into the password input.
+# A value of -1 will use GTK's default width.
+# Note: The entered width is a suggestion, GTK may render a narrower input.
+password-input-width = -1
+# Show the background image on all monitors or just the primary monitor.
+show-image-on-all-monitors = false
+# Show system info above the password input.
+# `<user>@<hostname>` is shown on the left side, & current time on the right.
+show-sys-info = false
+
+
+[greeter-hotkeys]
+# The modifier key used to trigger hotkeys. Possible values are:
+# "alt", "control" or "meta"
+# meta is also known as the "Windows"/"Super" key
+mod-key = meta
+# Power management shortcuts (single-key, case-sensitive)
+shutdown-key = s
+restart-key = r
+hibernate-key = h
+suspend-key = u
+# Cycle through available sessions
+session-key = e
+
+
+[greeter-theme]
+# A color from X11's `rgb.txt` file, a quoted hex string(`"#rrggbb"`) or a
+# RGB color(`rgb(r,g,b)`) are all acceptable formats.
+
+# The font to use for all text
+font = "Sans"
+# The font size to use for all text
+font-size = 1em
+# The font weight to use for all text
+font-weight = bold
+# The font style to use for all text
+font-style = normal
+# The default text color
+text-color = "#080800"
+# The color of the error text
+error-color = "#F8F8F0"
+# An absolute path to an optional background image.
+# Note: The file should be somewhere that LightDM has permissions to read
+#       (e.g., /etc/lightdm/).
+background-image = ""
+# Background image size:
+# auto: unscaled
+# cover: scale image to fill screen space
+# contain: scale image to fit inside screen space
+# (more options: https://www.w3.org/TR/css-backgrounds-3/#background-size)
+background-image-size = auto
+# The screen's background color.
+background-color = "#1B1D1E"
+# The password window's background color
+window-color = "#F92672"
+# The color of the password window's border
+border-color = "#080800"
+# The width of the password window's border.
+# A trailing `px` is required.
+border-width = 2px
+# The pixels of empty space around the password input.
+# Do not include a trailing `px`.
+layout-space = 15
+# The character used to mask your password. Possible values are:
+# "-1", "0", or a single unicode character(including emojis)
+# A value of -1 uses the default bullet & 0 displays no characters when you
+# type your password.
+password-character = -1
+# The color of the text in the password input.
+password-color = "#F8F8F0"
+# The background color of the password input.
+password-background-color = "#1B1D1E"
+# The color of the password input's border.
+# Falls back to `border-color` if missing.
+password-border-color = "#080800"
+# The width of the password input's border.
+# Falls back to `border-width` if missing.
+password-border-width = 2px
+# The border radius of the password input.
+password-border-radius = 0.341125em
+# Override font for system info
+# Falls back to `font` if missing.
+sys-info-font = "Mono"
+# Set font size of system info
+# Falls back to `font-size` if missing.
+sys-info-font-size = 0.8em
+# Override color for system info text
+# Falls back to `text-color` if missing.
+#sys-info-color = "#080800"
+# Margins around the system info section
+# The default `-5px -5px -5px` works well with the password label enabled.
+# If you have the label disabled, you might want to try `-5px -5px 0px`
+sys-info-margin = -5px -5px -5px
+# Relative position of window on screen (0-1 float)
+x-pos = 0.5
+y-pos = 0.5
\ No newline at end of file
diff --git a/data/lightdm-mini-greeter.desktop b/data/lightdm-mini-greeter.desktop
new file mode 100644
index 0000000..4ce8f32
--- /dev/null
+++ b/data/lightdm-mini-greeter.desktop
@@ -0,0 +1,5 @@
+[Desktop Entry]
+Name=LightDM Mini Greeter
+Comment=A minimal, highly configurable GTK3 greeter
+Exec=lightdm-mini-greeter
+Type=Application
diff --git a/debian/changelog b/debian/changelog
new file mode 100644
index 0000000..d635d1b
--- /dev/null
+++ b/debian/changelog
@@ -0,0 +1,41 @@
+lightdm-mini-greeter (0.5.1-1) unstable; urgency=medium
+
+  * New upstream release
+
+ -- Pavan Rikhi <pavan.rikhi@gmail.com>  Mon, 01 Mar 2021 19:22:00 -0500
+
+lightdm-mini-greeter (0.5.0-1) unstable; urgency=medium
+
+  * New upstream release
+
+ -- Pavan Rikhi <pavan.rikhi@gmail.com>  Tue, 23 Feb 2021 23:29:15 -0500
+
+lightdm-mini-greeter (0.4.0-1) unstable; urgency=medium
+
+  * New upstream release
+
+ -- Pavan Rikhi <pavan.rikhi@gmail.com>  Fri, 03 Apr 2020 06:50:10 -0400
+
+lightdm-mini-greeter (0.3.4-1.1) unstable; urgency=medium
+
+  * Register lightdm-mini-greeter in debian alternatives system.
+
+ -- Pavan Rikhi <pavan.rikhi@gmail.com>  Thu, 02 May 2019 07:50:10 +0300
+
+lightdm-mini-greeter (0.3.4-1) unstable; urgency=medium
+
+  * New upstream release
+
+ -- Pavan Rikhi <pavan.rikhi@gmail.com>  Thu, 02 Nov 2018 10:01:00 -0400
+
+lightdm-mini-greeter (0.3.3-1) unstable; urgency=medium
+
+  * New upstream release
+
+ -- Pavan Rikhi <pavan.rikhi@gmail.com>  Thu, 01 Nov 2018 18:55:01 -0400
+
+lightdm-mini-greeter (0.3.2-1) unstable; urgency=medium
+
+  * Initial package
+
+ -- Pavan Rikhi <pavan.rikhi@gmail.com>  Sun, 14 Oct 2018 10:32:01 -0400
diff --git a/debian/compat b/debian/compat
new file mode 100644
index 0000000..ec63514
--- /dev/null
+++ b/debian/compat
@@ -0,0 +1 @@
+9
diff --git a/debian/control b/debian/control
new file mode 100644
index 0000000..4266e7b
--- /dev/null
+++ b/debian/control
@@ -0,0 +1,19 @@
+Source: lightdm-mini-greeter
+Section: x11
+Priority: optional
+Maintainer: Pavan Rikhi <pavan.rikhi@gmail.com>
+Build-Depends: debhelper (>= 9),
+               pkg-config,
+               libgtk-3-dev,
+               liblightdm-gobject-dev
+Standards-Version: 3.9.8
+Homepage: https://github.com/prikhi/lightdm-mini-greeter
+Vcs-Git: https://github.com/prikhi/lightdm-mini-greeter.git
+Vcs-Browser: https://github.com/prikhi/lightdm-mini-greeter
+
+Package: lightdm-mini-greeter
+Provides: lightdm-greeter
+Architecture: any
+Depends: ${shlibs:Depends}, ${misc:Depends}
+Description: a minimal LightDM greeter
+ A minimal but highly configurable single-user GTK3 greeter for LightDM
diff --git a/debian/copyright b/debian/copyright
new file mode 100644
index 0000000..67aec79
--- /dev/null
+++ b/debian/copyright
@@ -0,0 +1,8 @@
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Upstream-Name: LightDM Mini Greeter
+Upstream-Contact: Pavan Rikhi <pavan.rikhi@gmail.com>
+Source: https://github.com/prikhi/lightdm-mini-greeter
+
+Files: *
+Copyright: Pavan Rikhi
+License: GPL-3+
diff --git a/debian/postinst b/debian/postinst
new file mode 100644
index 0000000..457a62a
--- /dev/null
+++ b/debian/postinst
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+set -e
+
+if [ "$1" = "configure" ]; then
+    update-alternatives --install /usr/share/xgreeters/lightdm-greeter.desktop \
+        lightdm-greeter /usr/share/xgreeters/lightdm-mini-greeter.desktop 60
+fi
+
+#DEBHELPER#
+
+exit 0
diff --git a/debian/prerm b/debian/prerm
new file mode 100644
index 0000000..72c87a9
--- /dev/null
+++ b/debian/prerm
@@ -0,0 +1,11 @@
+#!/bin/sh
+
+set -e
+
+if [ "$1" = "remove" ]; then
+    update-alternatives --remove lightdm-greeter /usr/share/xgreeters/lightdm-mini-greeter.desktop
+fi
+
+#DEBHELPER#
+
+exit 0
diff --git a/debian/rules b/debian/rules
new file mode 100755
index 0000000..1034960
--- /dev/null
+++ b/debian/rules
@@ -0,0 +1,12 @@
+#!/usr/bin/make -f
+
+%:
+	dh $@
+
+override_dh_auto_configure:
+	./autogen.sh
+	dh_auto_configure
+
+override_dh_auto_clean:
+	make maintainer-clean
+	dh_auto_clean
diff --git a/debian/source/format b/debian/source/format
new file mode 100644
index 0000000..163aaf8
--- /dev/null
+++ b/debian/source/format
@@ -0,0 +1 @@
+3.0 (quilt)
diff --git a/screenshot.png b/screenshot.png
new file mode 100644
index 0000000..1558261
--- /dev/null
+++ b/screenshot.png
diff --git a/src/app.c b/src/app.c
new file mode 100644
index 0000000..0877b55
--- /dev/null
+++ b/src/app.c
@@ -0,0 +1,60 @@
+/* Application Initialization Things */
+#include <stdlib.h>
+
+#include <gtk/gtk.h>
+#include <lightdm.h>
+
+#include "app.h"
+#include "callbacks.h"
+#include "config.h"
+
+
+/* Initialize the Greeter & UI */
+App *initialize_app(int argc, char **argv)
+{
+    g_log_set_always_fatal(G_LOG_LEVEL_CRITICAL);
+    gtk_init(&argc, &argv);
+
+    // Allocate & Initialize
+    App *app = malloc(sizeof(App));
+    if (app == NULL) {
+        g_error("Could not allocate memory for App");
+    }
+
+    app->config = initialize_config();
+    app->greeter = lightdm_greeter_new();
+    app->ui = initialize_ui(app->config);
+
+    // Connect Greeter & UI Signals
+    g_signal_connect(app->greeter, "authentication-complete",
+                     G_CALLBACK(authentication_complete_cb), app);
+    app->password_callback_id =
+        g_signal_connect(GTK_ENTRY(APP_PASSWORD_INPUT(app)), "activate",
+                         G_CALLBACK(handle_password), app);
+    // This was added to fix a bug where the background window would be focused
+    // instead of the main window, preventing users from entering their password.
+    // It's undocument & probably not necessary any more. Investigate & remove.
+    for (int m = 0; m < APP_MONITOR_COUNT(app); m++) {
+        g_signal_connect(GTK_WIDGET(APP_BACKGROUND_WINDOWS(app)[m]),
+                         "key-press-event",
+                         G_CALLBACK(handle_tab_key), app);
+    }
+    g_signal_connect(GTK_WIDGET(APP_MAIN_WINDOW(app)), "key-press-event",
+                     G_CALLBACK(handle_hotkeys), app);
+    // Update the current time every 15 seconds
+    if (app->config->show_sys_info) {
+        handle_time_update(app);
+        g_timeout_add_seconds(15, G_SOURCE_FUNC(handle_time_update), app);
+    }
+
+    return app;
+}
+
+
+/* Free any dynamically allocated memory */
+void destroy_app(App *app)
+{
+    destroy_config(app->config);
+    free(app->ui);
+    free(app);
+}
diff --git a/src/app.h b/src/app.h
new file mode 100644
index 0000000..4bfdab8
--- /dev/null
+++ b/src/app.h
@@ -0,0 +1,36 @@
+#ifndef APP_H
+#define APP_H
+
+#include <lightdm.h>
+
+#include "config.h"
+#include "focus_ring.h"
+#include "ui.h"
+
+
+typedef struct App_ {
+    Config *config;
+    LightDMGreeter *greeter;
+    UI *ui;
+    FocusRing *session_ring;
+
+    // Signal Handler ID for the `handle_password` callback
+    gulong password_callback_id;
+} App;
+
+
+App *initialize_app(int argc, char **argv);
+void destroy_app(App *app);
+
+/* Config Member Accessors */
+#define APP_LOGIN_USER(app)             (app)->config->login_user
+
+/* UI Member Accessors */
+#define APP_BACKGROUND_WINDOWS(app)     (app)->ui->background_windows
+#define APP_MONITOR_COUNT(app)          (app)->ui->monitor_count
+#define APP_MAIN_WINDOW(app)            (app)->ui->main_window
+#define APP_PASSWORD_INPUT(app)         (app)->ui->password_input
+#define APP_FEEDBACK_LABEL(app)         (app)->ui->feedback_label
+#define APP_TIME_LABEL(app)             (app)->ui->time_label
+
+#endif
diff --git a/src/callbacks.c b/src/callbacks.c
new file mode 100644
index 0000000..7cefa42
--- /dev/null
+++ b/src/callbacks.c
@@ -0,0 +1,152 @@
+/* Callback Functions for LightDM & GTK */
+#include <gtk/gtk.h>
+#include <lightdm.h>
+#include <string.h>
+#include <time.h>
+
+#include "app.h"
+#include "utils.h"
+#include "focus_ring.h"
+#include "callbacks.h"
+#include "compat.h"
+
+static void set_ui_feedback_label(App *app, gchar *feedback_text);
+
+
+/* LightDM Callbacks */
+
+/* Start the Selected Session Once Fully Authenticated.
+ *
+ * The callback will clear & re-enable the input widget, and re-add the
+ * `handle_password` callback so the user can try again if authentication
+ * fails.
+ */
+void authentication_complete_cb(LightDMGreeter *greeter, App *app)
+{
+    if (lightdm_greeter_get_is_authenticated(greeter)) {
+        const gchar *session = focus_ring_get_value(app->session_ring);
+
+        g_message("Attempting to start session: %s", session);
+
+        gboolean session_started_successfully =
+            !lightdm_greeter_start_session_sync(greeter, session, NULL);
+
+        if (!session_started_successfully) {
+            g_message("Unable to start session");
+        }
+    } else {
+        g_message("Authentication failed");
+        if (strlen(app->config->invalid_password_text) > 0) {
+            set_ui_feedback_label(app, app->config->invalid_password_text);
+        }
+        begin_authentication_as_default_user(app);
+    }
+    gtk_entry_set_text(GTK_ENTRY(APP_PASSWORD_INPUT(app)), "");
+    gtk_editable_set_editable(GTK_EDITABLE(APP_PASSWORD_INPUT(app)), TRUE);
+    app->password_callback_id =
+        g_signal_connect(GTK_ENTRY(APP_PASSWORD_INPUT(app)), "activate",
+                         G_CALLBACK(handle_password), app);
+}
+
+
+
+/* GUI Callbacks */
+
+/* Attempt to Authenticate When a Password is Entered.
+ *
+ * The callback disables itself & the input widget to prevent two
+ * authentication attempts from running at the same time - which would cause
+ * LightDM to throw a critical error.
+ */
+void handle_password(GtkWidget *password_input, App *app)
+{
+    if (app->password_callback_id != 0) {
+        g_signal_handler_disconnect(GTK_ENTRY(APP_PASSWORD_INPUT(app)),
+                                    app->password_callback_id);
+        app->password_callback_id = 0;
+    }
+
+    if (!lightdm_greeter_get_is_authenticated(app->greeter)) {
+        gtk_editable_set_editable(GTK_EDITABLE(password_input), FALSE);
+        if (!lightdm_greeter_get_in_authentication(app->greeter)) {
+            begin_authentication_as_default_user(app);
+        }
+        g_message("Using entered password to authenticate");
+        const gchar *password_text =
+            gtk_entry_get_text(GTK_ENTRY(password_input));
+        compat_greeter_respond(app->greeter, password_text, NULL);
+    } else {
+        g_message("Password entered while already authenticated");
+    }
+}
+
+
+/* Select the Password input if the Tab Key is Pressed */
+gboolean handle_tab_key(GtkWidget *widget, GdkEvent *event, App *app)
+{
+    (void) widget;  // Window accessible through app.
+
+    GdkEventKey *key_event = (GdkEventKey *) event;
+    if (event->type == GDK_KEY_PRESS && key_event->keyval == GDK_KEY_Tab) {
+        g_message("Handling Tab Key Press");
+        gtk_window_present(GTK_WINDOW(APP_MAIN_WINDOW(app)));
+        gtk_widget_grab_focus(GTK_WIDGET(APP_PASSWORD_INPUT(app)));
+        return FALSE;
+    }
+    return TRUE;
+}
+
+/* Shutdown, Restart, Hibernate, Suspend, or Switch Sessions if the correct
+ * keys are pressed.
+ */
+gboolean handle_hotkeys(GtkWidget *widget, GdkEventKey *event, App *app)
+{
+    (void) widget;
+    Config *config = app->config;
+    FocusRing *sessions = app->session_ring;
+
+    if (event->state & config->mod_bit) {
+        if (event->keyval == config->suspend_key && lightdm_get_can_suspend()) {
+            lightdm_suspend(NULL);
+        } else if (event->keyval == config->hibernate_key &&
+                   lightdm_get_can_hibernate()) {
+            lightdm_hibernate(NULL);
+        } else if (event->keyval == config->restart_key &&
+                   lightdm_get_can_restart()) {
+            lightdm_restart(NULL);
+        } else if (event->keyval == config->shutdown_key &&
+                   lightdm_get_can_shutdown()) {
+            lightdm_shutdown(NULL);
+        } else if (event->keyval == config->session_key && sessions != NULL) {
+            gchar *new_session = focus_ring_next(sessions);
+            set_ui_feedback_label(app, new_session);
+        } else {
+            return FALSE;
+        }
+        return TRUE;
+    }
+
+    return FALSE;
+}
+
+/** Determine the current time & update the time GtkLabel.
+ */
+gboolean handle_time_update(App *app)
+{
+    time_t now = time(NULL);
+    struct tm *local_now = localtime(&now);
+    gchar date_string[30];
+    strftime(date_string, 29, "%H:%M", local_now);
+    gtk_label_set_text(GTK_LABEL(APP_TIME_LABEL(app)), date_string);
+
+    return TRUE;
+}
+
+/* Set the Feedback Label's text & ensure it is visible. */
+static void set_ui_feedback_label(App *app, gchar *feedback_text)
+{
+    if (!gtk_widget_get_visible(APP_FEEDBACK_LABEL(app))) {
+        gtk_widget_show(APP_FEEDBACK_LABEL(app));
+    }
+    gtk_label_set_text(GTK_LABEL(APP_FEEDBACK_LABEL(app)), feedback_text);
+}
diff --git a/src/callbacks.h b/src/callbacks.h
new file mode 100644
index 0000000..2b18a54
--- /dev/null
+++ b/src/callbacks.h
@@ -0,0 +1,15 @@
+#ifndef CALLBACKS_H
+#define CALLBACKS_H
+
+#include <lightdm.h>
+
+#include "app.h"
+
+
+void authentication_complete_cb(LightDMGreeter *greeter, App *app);
+void handle_password(GtkWidget *password_input, App *app);
+gboolean handle_tab_key(GtkWidget *widget, GdkEvent *event, App *app);
+gboolean handle_hotkeys(GtkWidget *widget, GdkEventKey *event, App *app);
+gboolean handle_time_update(App *app);
+
+#endif
diff --git a/src/compat.c b/src/compat.c
new file mode 100644
index 0000000..74b683d
--- /dev/null
+++ b/src/compat.c
@@ -0,0 +1,25 @@
+/* Backwards-Compatible Functions for LightDM */
+#include <lightdm.h>
+
+#include "compat.h"
+
+gboolean compat_greeter_authenticate(LightDMGreeter *greeter, const gchar *username, GError **error)
+{
+#ifdef LIGHTDM_1_19_1_LOWER
+    lightdm_greeter_authenticate(greeter, username);
+    return TRUE;
+#else
+    return lightdm_greeter_authenticate(greeter, username, error);
+#endif
+}
+
+gboolean compat_greeter_respond(LightDMGreeter *greeter, const gchar *response, GError **error)
+{
+#ifdef LIGHTDM_1_19_1_LOWER
+    lightdm_greeter_respond(greeter, response);
+    return TRUE;
+#else
+    return lightdm_greeter_respond(greeter, response, error);
+#endif
+
+}
diff --git a/src/compat.h b/src/compat.h
new file mode 100644
index 0000000..10546fa
--- /dev/null
+++ b/src/compat.h
@@ -0,0 +1,12 @@
+#ifndef COMPAT_H
+#define COMPAT_H
+
+#include <lightdm.h>
+
+#include "defines.h"
+
+// v1.19.2 of LightDM introduced GError arguments but Debian jessie & stretch are not updated yet
+gboolean compat_greeter_authenticate(LightDMGreeter *greeter, const gchar *username, GError **error);
+gboolean compat_greeter_respond(LightDMGreeter *greeter, const gchar *response, GError **error);
+
+#endif
diff --git a/src/config.c b/src/config.c
new file mode 100644
index 0000000..0d7b21b
--- /dev/null
+++ b/src/config.c
@@ -0,0 +1,435 @@
+/* Functions related to the Configuration */
+#include <stdlib.h>
+#include <string.h>
+
+#include <gdk/gdk.h>
+#include <glib.h>
+
+#include "config.h"
+#include "utils.h"
+
+
+static gchar *parse_greeter_string(GKeyFile *keyfile, const char *group_name,
+                                   const char *key_name, const gchar *fallback);
+static gint parse_greeter_integer(GKeyFile *keyfile, const char *group_name,
+                                  const char *key_name, const gint fallback);
+static gboolean parse_greeter_boolean(GKeyFile *keyfile, const char *group_name,
+                                      const char *key_name, const gboolean fallback);
+static GdkRGBA *parse_greeter_color_key(GKeyFile *keyfile, const char *key_name, const char *default_str);
+static guint parse_greeter_hotkey_keyval(GKeyFile *keyfile, const char *key_name, const char default_char);
+static gunichar *parse_greeter_password_char(GKeyFile *keyfile);
+static gfloat parse_greeter_password_alignment(GKeyFile *keyfile);
+static gboolean is_rtl_keymap_layout(void);
+gboolean input_string_equals(gchar *input_str, const gchar * const fixed_str);
+
+/* Initialize the configuration, sourcing the greeter's configuration file */
+Config *initialize_config(void)
+{
+    Config *config = malloc(sizeof(Config));
+    if (config == NULL) {
+        g_error("Could not allocate memory for Config");
+    }
+
+    // Load the key-value file
+    GKeyFile *keyfile = g_key_file_new();
+    GError *keyerror = NULL;
+    gboolean keyfile_loaded = g_key_file_load_from_file(
+        keyfile, CONFIG_FILE, G_KEY_FILE_NONE, &keyerror);
+    if (!keyfile_loaded) {
+        if (keyerror != NULL) {
+            g_error("Could not load configuration file: %s", keyerror->message);
+            free(keyerror);
+        } else {
+            g_error("Could not load configuration file.");
+        }
+    }
+
+    // Parse values from the keyfile into a Config.
+    config->login_user =
+        g_strchomp(g_key_file_get_string(keyfile, "greeter", "user", NULL));
+    if (strcmp(config->login_user, "CHANGE_ME") == 0) {
+        g_message("User configuration value is unchanged.");
+    }
+    config->show_password_label =
+        parse_greeter_boolean(keyfile, "greeter", "show-password-label", TRUE);
+    config->password_label_text = parse_greeter_string(
+        keyfile, "greeter", "password-label-text", "Password:");
+    config->invalid_password_text = parse_greeter_string(
+        keyfile, "greeter", "invalid-password-text", "Invalid Password");
+    config->show_input_cursor =
+        parse_greeter_boolean(keyfile, "greeter", "show-input-cursor", TRUE);
+    config->password_alignment = parse_greeter_password_alignment(keyfile);
+    config->password_input_width = parse_greeter_integer(
+        keyfile, "greeter", "password-input-width", -1);
+    config->show_image_on_all_monitors = parse_greeter_boolean(
+        keyfile, "greeter", "show-image-on-all-monitors", FALSE);
+    config->show_sys_info = parse_greeter_boolean(
+        keyfile, "greeter", "show-sys-info", FALSE);
+
+    // Parse Hotkey Settings
+    config->suspend_key = parse_greeter_hotkey_keyval(keyfile, "suspend-key", 'u');
+    config->hibernate_key = parse_greeter_hotkey_keyval(keyfile, "hibernate-key", 'h');
+    config->restart_key = parse_greeter_hotkey_keyval(keyfile, "restart-key", 'r');
+    config->shutdown_key = parse_greeter_hotkey_keyval(keyfile, "shutdown-key", 's');
+    config->session_key = parse_greeter_hotkey_keyval(keyfile, "session-key", 'e');
+    gchar *mod_key =
+        g_key_file_get_string(keyfile, "greeter-hotkeys", "mod-key", NULL);
+    if (mod_key == NULL) {
+        config->mod_bit = GDK_SUPER_MASK;
+    } else {
+        g_strchomp(mod_key);
+        if (strcmp(mod_key, "control") == 0) {
+            config->mod_bit = GDK_CONTROL_MASK;
+        } else if (strcmp(mod_key, "alt") == 0) {
+            config->mod_bit = GDK_MOD1_MASK;
+        } else if (strcmp(mod_key, "meta") == 0) {
+            config->mod_bit = GDK_SUPER_MASK;
+        } else {
+            g_error("Invalid mod-key configuration value: '%s'\n", mod_key);
+        }
+    }
+
+    // Parse Theme Settings
+    // Font
+    config->font =
+        parse_greeter_string(keyfile, "greeter-theme", "font", "Sans");
+    config->font_size =
+        parse_greeter_string(keyfile, "greeter-theme", "font-size", "1em");
+    config->font_weight =
+        parse_greeter_string(keyfile, "greeter-theme", "font-weight", "bold");
+    config->font_style =
+        parse_greeter_string(keyfile, "greeter-theme", "font-style", "normal");
+    config->text_color =
+        parse_greeter_color_key(keyfile, "text-color", "#080800");
+    config->error_color =
+        parse_greeter_color_key(keyfile, "error-color", "#F8F8F0");
+    // Background
+    config->background_image =
+        g_key_file_get_string(keyfile, "greeter-theme", "background-image", NULL);
+    if (config->background_image == NULL || strcmp(config->background_image, "") == 0) {
+        config->background_image = (gchar *) "\"\"";
+    }
+    config->background_color =
+        parse_greeter_color_key(keyfile, "background-color", "#1B1D1E");
+    config->background_image_size =
+        parse_greeter_string(keyfile, "greeter-theme", "background-image-size", "auto");
+    // Window
+    config->window_color =
+        parse_greeter_color_key(keyfile, "window-color", "#F92672");
+    config->border_color =
+        parse_greeter_color_key(keyfile, "border-color", "#080800");
+    config->border_width = parse_greeter_string(
+        keyfile, "greeter-theme", "border-width", "2px");
+    // Password
+    config->password_char =
+        parse_greeter_password_char(keyfile);
+    config->password_color =
+        parse_greeter_color_key(keyfile, "password-color", "#F8F8F0");
+    config->password_background_color =
+        parse_greeter_color_key(keyfile, "password-background-color", "#1B1D1E");
+    gchar *temp_password_border_color = g_key_file_get_string(
+        keyfile, "greeter-theme", "password-border-color", NULL);
+    if (temp_password_border_color == NULL) {
+        config->password_border_color = config->border_color;
+    } else {
+        free(temp_password_border_color);
+        config->password_border_color =
+            parse_greeter_color_key(keyfile, "password-border-color", "#080800");
+    }
+    config->password_border_width = parse_greeter_string(
+        keyfile, "greeter-theme", "password-border-width", config->border_width);
+    config->password_border_radius = parse_greeter_string(
+        keyfile, "greeter-theme", "password-border-radius", "0.341125em");
+    // System Info
+    gchar *temp_sys_info_color = g_key_file_get_string(
+        keyfile, "greeter-theme", "sys-info-color", NULL);
+    if (temp_sys_info_color == NULL) {
+        config->sys_info_color = config->text_color;
+    } else {
+        config->sys_info_color = parse_greeter_color_key(
+            keyfile, "sys-info-color", "#080800");
+    }
+    config->sys_info_font = parse_greeter_string(keyfile, "greeter-theme", "sys-info-font", config->font);
+    config->sys_info_font_size =
+        parse_greeter_string(keyfile, "greeter-theme", "sys-info-font-size", config->font_size);
+    config->sys_info_margin =
+        parse_greeter_string(keyfile, "greeter-theme", "sys-info-margin", "-5px -5px -5px");
+
+
+    gint layout_spacing =
+        parse_greeter_integer(keyfile, "greeter-theme", "layout-space", 15);
+    if (layout_spacing < 0) {
+        config->layout_spacing = (guint) (-1 * layout_spacing);
+    } else {
+        config->layout_spacing = (guint) layout_spacing;
+    }
+
+    config->x_pos = g_key_file_get_double(keyfile, "greeter-theme", "x-pos", NULL);
+    config->y_pos = g_key_file_get_double(keyfile, "greeter-theme", "y-pos", NULL);
+
+    g_key_file_free(keyfile);
+
+    return config;
+}
+
+
+/* Cleanup any memory allocated for the Config */
+void destroy_config(Config *config)
+{
+    free(config->login_user);
+    free(config->font);
+    free(config->font_size);
+    free(config->font_weight);
+    free(config->font_style);
+    free(config->text_color);
+    free(config->error_color);
+    free(config->background_image);
+    free(config->background_color);
+    free(config->background_image_size);
+    free(config->window_color);
+    free(config->border_color);
+    free(config->border_width);
+    free(config->password_label_text);
+    free(config->invalid_password_text);
+    free(config->password_char);
+    free(config->password_color);
+    free(config->password_background_color);
+    free(config->password_border_color);
+    free(config->password_border_width);
+    free(config->password_border_radius);
+    free(config->sys_info_color);
+    free(config->sys_info_font_size);
+    free(config->sys_info_margin);
+    free(config);
+}
+
+
+/* Parse a string from the config file, returning a copy of the fallback value
+ * if the key is not present in the group.
+ */
+static gchar *parse_greeter_string(GKeyFile *keyfile, const char *group_name,
+                                   const char *key_name, const gchar *fallback)
+{
+    gchar *parsed_string = g_key_file_get_string(keyfile, group_name, key_name, NULL);
+    if (parsed_string == NULL) {
+        g_warning("Could not find value for %s.%s - falling back to '%s'",
+                  group_name, key_name, fallback);
+        return g_strdup(fallback);
+    } else {
+        return parsed_string;
+    }
+}
+
+/* Parse an integer from the config file, returning the fallback value if the
+ * key is not present in the group, or if the value is not an integer.
+ */
+static gint parse_greeter_integer(GKeyFile *keyfile, const char *group_name,
+                                  const char *key_name, const gint fallback)
+{
+    GError *parse_error = NULL;
+    gint parse_result = g_key_file_get_integer(
+        keyfile, group_name, key_name, &parse_error);
+    if (parse_error != NULL) {
+        if (parse_error->code == G_KEY_FILE_ERROR_INVALID_VALUE) {
+            // Read the value as a string so we can log it
+            gchar *value = g_key_file_get_string(
+                keyfile, group_name, key_name, NULL);
+            g_warning("Invalid integer for %s.%s: `%s`",
+                      group_name, key_name, value);
+            free(value);
+        }
+        g_error_free(parse_error);
+        return fallback;
+    }
+    return parse_result;
+}
+
+/* Parse a boolean from the config file, returning the fallback value if the
+ * key is not present in the group or cannot be parsed as a boolean.
+ */
+static gboolean parse_greeter_boolean(GKeyFile *keyfile, const char *group_name,
+                                      const char *key_name, const gboolean fallback)
+{
+    GError *parse_error = NULL;
+    gboolean parse_result = g_key_file_get_boolean(
+        keyfile, group_name, key_name, &parse_error);
+    if (!parse_result && parse_error != NULL) {
+        if (parse_error->code == G_KEY_FILE_ERROR_INVALID_VALUE) {
+            // Read the value as a string so we can log it
+            gchar *value = g_key_file_get_string(
+                keyfile, group_name, key_name, NULL);
+            g_warning("Invalid boolean for %s.%s: `%s`\n",
+                      group_name, key_name, value);
+            g_free(value);
+        }
+        g_error_free(parse_error);
+        return fallback;
+    }
+    return parse_result;
+}
+
+/* Parse a greeter-colors group key into a newly-allocated GdkRGBA value */
+static GdkRGBA *parse_greeter_color_key(GKeyFile *keyfile, const char *key_name, const char *default_str)
+{
+    gchar *color_string = g_key_file_get_string(
+        keyfile, "greeter-theme", key_name, NULL);
+    if (color_string == NULL) {
+        g_warning("Could not find value for %s.%s - falling back to '%s'",
+                  "greeter-theme", key_name, default_str);
+    }
+
+    GdkRGBA *default_color = malloc(sizeof(GdkRGBA));
+    gboolean default_was_parsed = gdk_rgba_parse(default_color, default_str);
+    if (!default_was_parsed) {
+        g_critical("Could not parse the default '%s' setting: %s", key_name, default_str);
+    }
+
+    if (color_string != NULL) {
+        if (strstr(color_string, "#") != NULL) {
+            // Remove quotations from hex color strings
+            remove_char(color_string, '"');
+            remove_char(color_string, '\'');
+        }
+
+        GdkRGBA *color = malloc(sizeof(GdkRGBA));
+        gboolean color_was_parsed = gdk_rgba_parse(color, color_string);
+        if (color_was_parsed) {
+            free(default_color);
+            return color;
+        }
+        g_warning("Could not parse the '%s' setting: %s - falling back to default of %s",
+                    key_name, color_string, default_str);
+        free(color);
+    }
+    return default_color;
+}
+
+/* Parse a greeter-hotkeys key into the GDKkeyval of it's first character */
+static guint parse_greeter_hotkey_keyval(GKeyFile *keyfile, const char *key_name, const char default_char)
+{
+    gchar *key = g_key_file_get_string(
+        keyfile, "greeter-hotkeys", key_name, NULL);
+
+    guint32 key_code;
+    if (key == NULL) {
+        key_code = (guint32) default_char;
+    } else if (strcmp(key, "") == 0) {
+        g_warning("Configuration contains empty key for '%s' - falling back to default of %c\n", key_name, default_char);
+        key_code = (guint32) default_char;
+    } else {
+        key_code = (guint32) key[0];
+    }
+
+    return gdk_unicode_to_keyval(key_code);
+}
+
+/* Parse the password masking character that should be displayed when typing
+ * into the password input.
+ *
+ * We first attempt to parse a literal -1 or 0, where -1 means to use the
+ * default character & 0 means to display no characters when typing a password.
+ *
+ * If that parsing fails, we attempt to parse the field as a string & use the
+ * first character of the string. If the string is empty or parsing fails, we
+ * fall back to the default characer.
+ *
+ * Since the related gtk_entry function takes a unsigned int, we use pointers,
+ * where NULL means "use the default" & all other values indicate an argument
+ * to the `gtk_entry_set_invisible_char` function.
+ *
+ */
+static gunichar *parse_greeter_password_char(GKeyFile *keyfile)
+{
+    const char *const group_name = "greeter-theme";
+    const char *const key_name = "password-character";
+    GError *parse_error = NULL;
+
+    // Attempt the int parsing
+
+    const gint int_result = g_key_file_get_integer(
+        keyfile, group_name, key_name, &parse_error);
+    // Matches -1
+    if (int_result == -1) {
+        return NULL;
+    }
+
+    gunichar *result = malloc(sizeof(gunichar));
+    // Matches 0
+    if (int_result == 0 && parse_error == NULL) {
+        *result = 0;
+        return result;
+    } else if (parse_error != NULL) {
+        g_error_free(parse_error);
+    }
+
+    // Atempt the string parsing
+
+    gchar *str_result = g_key_file_get_string(
+        keyfile, group_name, key_name, NULL);
+
+    // Invalid or 0-length string
+    if (str_result == NULL || strlen(str_result) == 0) {
+        if (str_result != NULL) {
+            free(str_result);
+        }
+        free(result);
+        return NULL;
+    }
+
+    // Convert to unicode code points
+    gunichar *unicode_str = g_utf8_to_ucs4(str_result, -1, NULL, NULL, NULL);
+    free(str_result);
+
+    if (unicode_str == NULL) {
+        free(result);
+        return NULL;
+    }
+
+    *result = unicode_str[0];
+    g_free(unicode_str);
+    return result;
+}
+
+/* Parse the password input alignment, properly handling RTL layouts.
+ *
+ * Note that the gboolean returned by this function is meant to be used with
+ * the `gtk_entry_set_alignment` function.
+ */
+static gfloat parse_greeter_password_alignment(GKeyFile *keyfile)
+{
+    gfloat alignment;
+
+    gchar *password_alignment_text = parse_greeter_string(
+        keyfile, "greeter", "password-alignment", "right");
+    gboolean is_rtl = is_rtl_keymap_layout();
+
+    if (input_string_equals(password_alignment_text, "left")) {
+        alignment = is_rtl ? 1 : 0;
+    } else if (input_string_equals(password_alignment_text, "center")) {
+        alignment = 0.5;
+    } else {
+        alignment = is_rtl ? 0 : 1;
+    }
+    free(password_alignment_text);
+    return alignment;
+}
+
+/* Determine if the default Display's Keymap is in the Right-to-Left direction
+ */
+static gboolean is_rtl_keymap_layout(void)
+{
+    GdkDisplay *display = gdk_display_get_default();
+    if (display == NULL) {
+        return FALSE;
+    }
+    GdkKeymap *keymap = gdk_keymap_get_for_display(display);
+    PangoDirection text_direction = gdk_keymap_get_direction(keymap);
+    return text_direction == PANGO_DIRECTION_RTL;
+}
+
+/* Take a string from the config file, trim any whitespace & check it's
+ * equality with a fixed string.
+ */
+gboolean input_string_equals(gchar *input_str, const gchar * const fixed_str) {
+    return strcmp(g_strchomp(input_str), fixed_str) == 0;
+}
diff --git a/src/config.h b/src/config.h
new file mode 100644
index 0000000..51e0f26
--- /dev/null
+++ b/src/config.h
@@ -0,0 +1,68 @@
+#ifndef CONFIG_H
+#define CONFIG_H
+
+#include <gdk/gdk.h>
+#include <glib.h>
+
+#ifndef CONFIG_FILE
+#define CONFIG_FILE "/etc/lightdm/lightdm-mini-greeter.conf"
+#endif
+
+
+// Represents the System's Greeter Configuration. Parsed from `CONFIG_FILE`.
+typedef struct Config_ {
+    gchar    *login_user;
+    gboolean  show_password_label;
+    gchar    *password_label_text;
+    gchar    *invalid_password_text;
+    gboolean  show_input_cursor;
+    gfloat    password_alignment;
+    gint      password_input_width;
+    gboolean  show_image_on_all_monitors;
+    gboolean  show_sys_info;
+
+    /* Theme Configuration */
+    gchar    *font;
+    gchar    *font_size;
+    gchar    *font_weight;
+    gchar    *font_style;
+    GdkRGBA  *text_color;
+    GdkRGBA  *error_color;
+    // Windows
+    gchar    *background_image;
+    GdkRGBA  *background_color;
+    gchar    *background_image_size;
+    GdkRGBA  *window_color;
+    GdkRGBA  *border_color;
+    gchar    *border_width;
+    guint     layout_spacing;
+    // Window position
+    gdouble   x_pos;
+    gdouble   y_pos;
+    // Password Input
+    gunichar *password_char;
+    GdkRGBA  *password_color;
+    GdkRGBA  *password_background_color;
+    GdkRGBA  *password_border_color;
+    gchar    *password_border_width;
+    gchar    *password_border_radius;
+    // System Info
+    gchar    *sys_info_font;
+    gchar    *sys_info_font_size;
+    GdkRGBA  *sys_info_color;
+    gchar    *sys_info_margin;
+
+    /* Hotkeys */
+    guint     mod_bit;
+    guint     shutdown_key;
+    guint     restart_key;
+    guint     hibernate_key;
+    guint     suspend_key;
+    guint     session_key;
+} Config;
+
+
+Config *initialize_config(void);
+void destroy_config(Config *config);
+
+#endif
diff --git a/src/focus_ring.c b/src/focus_ring.c
new file mode 100644
index 0000000..45f64b2
--- /dev/null
+++ b/src/focus_ring.c
@@ -0,0 +1,105 @@
+/* Functions related to a ring of focusable items */
+
+#include "focus_ring.h"
+
+static gint find_by_value(gconstpointer data, gconstpointer user_data);
+
+
+/* Initialize the FocusRing with the given options, value getter, & label
+ *
+ * Returns NULL if the passed GList is NULL.
+ * Throws an error if cannot allocate memory for the FocusRing.
+ */
+FocusRing *initialize_focus_ring(const GList *options, gchar *(*getter_function)(gconstpointer), const gchar *const label)
+{
+    if (options == NULL) {
+        return NULL;
+    }
+
+    FocusRing *ring = malloc(sizeof(FocusRing));
+    if (ring == NULL) {
+        g_error("Could not allocate memory for FocusRing: %s", label);
+    }
+
+    ring->selected = options;
+    ring->beginning = options;
+    ring->end = g_list_last((GList *) options);
+
+    ring->getter_function = getter_function;
+
+    return ring;
+}
+
+/* Free only the FocusRing & not the underlying GList */
+void destroy_focus_ring(FocusRing *ring)
+{
+    free(ring);
+}
+
+/* Focus the next item in the ring, or loop back to the first item. */
+gchar *focus_ring_next(FocusRing *ring)
+{
+    if (ring->selected->next == NULL) {
+        ring->selected = ring->beginning;
+    } else {
+        ring->selected = ring->selected->next;
+    }
+    return focus_ring_get_value(ring);
+}
+
+/* Focus the previous item in the ring, or loop back to the last item. */
+gchar *focus_ring_prev(FocusRing *ring)
+{
+    if (ring->selected->prev == NULL) {
+        ring->selected = ring->end;
+    } else {
+        ring->selected = ring->selected->prev;
+    }
+    return focus_ring_get_value(ring);
+}
+
+/* Get the currently selected data. */
+gconstpointer focus_ring_get_selected(FocusRing *ring)
+{
+    return ring->selected->data;
+}
+
+/* Get the inner value of the currently selected item. */
+gchar *focus_ring_get_value(FocusRing *ring)
+{
+    return ring->getter_function(focus_ring_get_selected(ring));
+}
+
+
+/* Internal data used by the find_by_value & focus_ring_scroll_to_value
+ * functions.
+ */
+struct FindByValueData {
+    FocusRing *ring;
+    const gchar *target_value;
+};
+
+/* Attempt to scroll the ring to the item with the matching inner value.
+ *
+ * Does nothing if the item cannot be found.
+ */
+gchar *focus_ring_scroll_to_value(FocusRing *ring, const gchar *target_value)
+{
+    struct FindByValueData user_data = { .ring = ring, .target_value = target_value };
+    GList *find_result = g_list_find_custom((GList *) ring->beginning, (void *) &user_data, &find_by_value);
+    if (find_result != NULL) {
+        ring->selected = find_result;
+    }
+    return focus_ring_get_value(ring);
+}
+
+/* Determine if the given data's inner value matches what we're looking for.
+ *
+ * Used as callback to the g_list_find_custom function.
+ */
+static gint find_by_value(gconstpointer data, gconstpointer user_data)
+{
+    struct FindByValueData *local_user_data = (struct FindByValueData *) user_data;
+
+    return g_strcmp0(local_user_data->ring->getter_function(data), local_user_data->target_value);
+}
diff --git a/src/focus_ring.h b/src/focus_ring.h
new file mode 100644
index 0000000..74e9002
--- /dev/null
+++ b/src/focus_ring.h
@@ -0,0 +1,31 @@
+#ifndef FOCUSRING_H
+#define FOCUSRING_H
+
+#include <gdk/gdk.h>
+
+
+/* A FocusRing is an scrollable list that wraps around to the beginning/end
+ * when the selection is moved out-of-bounds.
+ */
+typedef struct FocusRing_ {
+    /* Points to current selection */
+    const GList *selected;
+    /* Points to beginning of list */
+    const GList *beginning;
+    /* Points to end of list */
+    const GList *end;
+
+    /* Function to retrieve the target "inner value" from the GList's data */
+    gchar *(*getter_function)(gconstpointer);
+} FocusRing;
+
+FocusRing *initialize_focus_ring(const GList *options, gchar *(*getter_function)(gconstpointer), const gchar *const label);
+void destroy_focus_ring(FocusRing *ring);
+
+gchar *focus_ring_next(FocusRing *ring);
+gchar *focus_ring_prev(FocusRing *ring);
+gconstpointer focus_ring_get_selected(FocusRing *ring);
+gchar *focus_ring_get_value(FocusRing *ring);
+gchar *focus_ring_scroll_to_value(FocusRing *ring, const gchar *target_value);
+
+#endif
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..99351c9
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,28 @@
+/* lightdm-mini-greeter - A minimal GTK LightDM Greeter */
+#include <sys/mman.h>
+
+#include <gtk/gtk.h>
+
+#include "app.h"
+#include "utils.h"
+
+
+int main(int argc, char **argv)
+{
+    mlockall(MCL_CURRENT | MCL_FUTURE);  // Keep data out of any swap devices
+
+    App *app = initialize_app(argc, argv);
+
+    connect_to_lightdm_daemon(app->greeter);
+    begin_authentication_as_default_user(app);
+    make_session_focus_ring(app);
+
+    for (int m = 0; m < APP_MONITOR_COUNT(app); m++) {
+        gtk_widget_show_all(GTK_WIDGET(APP_BACKGROUND_WINDOWS(app)[m]));
+    }
+    gtk_widget_show_all(GTK_WIDGET(APP_MAIN_WINDOW(app)));
+    gtk_window_present(APP_MAIN_WINDOW(app));
+    gtk_main();
+
+    destroy_app(app);
+}
diff --git a/src/ui.c b/src/ui.c
new file mode 100644
index 0000000..6d2d42c
--- /dev/null
+++ b/src/ui.c
@@ -0,0 +1,430 @@
+/* Functions related to the GUI. */
+#define _GNU_SOURCE
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <gtk/gtk.h>
+#include <glib.h>
+#include <lightdm.h>
+
+#include "callbacks.h"
+#include "ui.h"
+#include "utils.h"
+
+
+static UI *new_ui(void);
+static void setup_background_windows(Config *config, UI *ui);
+static GtkWindow *new_background_window(GdkMonitor *monitor);
+static void set_window_to_monitor_size(GdkMonitor *monitor, GtkWindow *window);
+static void hide_mouse_cursor(GtkWidget *window, gpointer user_data);
+static void move_mouse_to_background_window(void);
+static void setup_main_window(Config *config, UI *ui);
+static void place_main_window(GtkWidget *main_window, gpointer user_data);
+static void create_and_attach_layout_container(UI *ui);
+static void create_and_attach_sys_info_label(Config *config, UI *ui);
+static void create_and_attach_password_field(Config *config, UI *ui);
+static void create_and_attach_feedback_label(UI *ui);
+static void attach_config_colors_to_screen(Config *config);
+
+
+/* Initialize the Main Window & it's Children */
+UI *initialize_ui(Config *config)
+{
+    UI *ui = new_ui();
+
+    setup_background_windows(config, ui);
+    move_mouse_to_background_window();
+    setup_main_window(config, ui);
+    create_and_attach_layout_container(ui);
+    create_and_attach_sys_info_label(config, ui);
+    create_and_attach_password_field(config, ui);
+    create_and_attach_feedback_label(ui);
+    attach_config_colors_to_screen(config);
+
+    return ui;
+}
+
+
+/* Create a new UI with all values initialized to NULL */
+static UI *new_ui(void)
+{
+    UI *ui = malloc(sizeof(UI));
+    if (ui == NULL) {
+        g_error("Could not allocate memory for UI");
+    }
+    ui->background_windows = NULL;
+    ui->monitor_count = 0;
+    ui->main_window = NULL;
+    ui->layout_container = NULL;
+    ui->password_label = NULL;
+    ui->password_input = NULL;
+    ui->feedback_label = NULL;
+
+    return ui;
+}
+
+
+/* Create a Background Window for Every Monitor */
+static void setup_background_windows(Config *config, UI *ui)
+{
+    GdkDisplay *display = gdk_display_get_default();
+    ui->monitor_count = gdk_display_get_n_monitors(display);
+    ui->background_windows = malloc((uint) ui->monitor_count * sizeof (GtkWindow *));
+    for (int m = 0; m < ui->monitor_count; m++) {
+        GdkMonitor *monitor = gdk_display_get_monitor(display, m);
+        if (monitor == NULL) {
+            break;
+        }
+
+        GtkWindow *background_window = new_background_window(monitor);
+        ui->background_windows[m] = background_window;
+
+        gboolean show_background_image =
+            (gdk_monitor_is_primary(monitor) || config->show_image_on_all_monitors) &&
+            (strcmp(config->background_image, "\"\"") != 0);
+        if (show_background_image) {
+            GtkStyleContext *style_context =
+                gtk_widget_get_style_context(GTK_WIDGET(background_window));
+            gtk_style_context_add_class(style_context, "with-image");
+        }
+    }
+}
+
+
+/* Create & Configure a Background Window for a Monitor */
+static GtkWindow *new_background_window(GdkMonitor *monitor)
+{
+    GtkWindow *background_window = GTK_WINDOW(gtk_window_new(
+        GTK_WINDOW_TOPLEVEL));
+    gtk_window_set_type_hint(background_window, GDK_WINDOW_TYPE_HINT_DESKTOP);
+    gtk_window_set_keep_below(background_window, TRUE);
+    gtk_widget_set_name(GTK_WIDGET(background_window), "background");
+
+    // Set Window Size to Monitor Size
+    set_window_to_monitor_size(monitor, background_window);
+
+    g_signal_connect(background_window, "realize", G_CALLBACK(hide_mouse_cursor),
+                     NULL);
+    // TODO: is this needed?
+    g_signal_connect(background_window, "destroy", G_CALLBACK(gtk_main_quit),
+                     NULL);
+
+    return background_window;
+}
+
+
+/* Set the Window's Minimum Size to the Default Screen's Size */
+static void set_window_to_monitor_size(GdkMonitor *monitor, GtkWindow *window)
+{
+    GdkRectangle geometry;
+    gdk_monitor_get_geometry(monitor, &geometry);
+    gtk_widget_set_size_request(
+        GTK_WIDGET(window),
+        geometry.width,
+        geometry.height
+    );
+    gtk_window_move(window, geometry.x, geometry.y);
+    gtk_window_set_resizable(window, FALSE);
+}
+
+
+/* Hide the mouse cursor when it is hovered over the given widget.
+ *
+ * Note: This has no effect when used with a GtkEntry widget.
+ */
+static void hide_mouse_cursor(GtkWidget *widget, gpointer user_data)
+{
+    GdkDisplay *display = gdk_display_get_default();
+    GdkCursor *blank_cursor = gdk_cursor_new_for_display(display, GDK_BLANK_CURSOR);
+    GdkWindow *window = gtk_widget_get_window(widget);
+    if (window != NULL) {
+        gdk_window_set_cursor(window, blank_cursor);
+    }
+}
+
+
+/* Move the mouse cursor to the upper-left corner of the primary screen.
+ *
+ * This is necessary for hiding the mouse cursor because we cannot hide the
+ * mouse cursor when it is hovered over the GtkEntry password input. Instead,
+ * we hide the cursor when it is over the background windows and then move the
+ * mouse to the corner of the screen where it should hover over the background
+ * window or main window instead.
+ */
+static void move_mouse_to_background_window(void)
+{
+    GdkDisplay *display = gdk_display_get_default();
+    GdkDevice *mouse = gdk_seat_get_pointer(gdk_display_get_default_seat(display));
+    GdkScreen *screen = gdk_display_get_default_screen(display);
+
+    gdk_device_warp(mouse, screen, 0, 0);
+}
+
+
+/* Create & Configure the Main Window */
+static void setup_main_window(Config *config, UI *ui)
+{
+    GtkWindow *main_window = GTK_WINDOW(gtk_window_new(GTK_WINDOW_TOPLEVEL));
+
+    gtk_container_set_border_width(GTK_CONTAINER(main_window), config->layout_spacing);
+    gtk_widget_set_name(GTK_WIDGET(main_window), "main");
+
+    g_signal_connect(main_window, "show", G_CALLBACK(place_main_window), config);
+    g_signal_connect(main_window, "realize", G_CALLBACK(hide_mouse_cursor), NULL);
+    g_signal_connect(main_window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
+
+    ui->main_window = main_window;
+}
+
+
+/* Move the Main Window to the Center of the Primary Monitor
+ *
+ * This is done after the main window is shown(via the "show" signal) so that
+ * the width of the window is properly calculated. Otherwise the returned size
+ * will not include the size of the password label text.
+ */
+static void place_main_window(GtkWidget *main_window, gpointer user_data)
+{
+    // Get the Geometry of the Primary Monitor
+    GdkDisplay *display = gdk_display_get_default();
+    GdkMonitor *primary_monitor = gdk_display_get_primary_monitor(display);
+    GdkRectangle primary_monitor_geometry;
+    gdk_monitor_get_geometry(primary_monitor, &primary_monitor_geometry);
+
+    // Get the Geometry of the Window
+    gint window_width, window_height;
+    gtk_window_get_size(GTK_WINDOW(main_window), &window_width, &window_height);
+
+    Config *config = (Config *) user_data;
+    gint xpos = (gint) (primary_monitor_geometry.width * config->x_pos);
+    gint ypos = (gint) (primary_monitor_geometry.height * config->y_pos);
+
+    gtk_window_move(
+        GTK_WINDOW(main_window),
+        primary_monitor_geometry.x + xpos - window_width / 2,
+        primary_monitor_geometry.y + ypos - window_height / 2);
+}
+
+
+/* Add a Layout Container for All Displayed Widgets */
+static void create_and_attach_layout_container(UI *ui)
+{
+    ui->layout_container = GTK_GRID(gtk_grid_new());
+    gtk_grid_set_column_spacing(ui->layout_container, 5);
+    gtk_grid_set_row_spacing(ui->layout_container, 5);
+
+    gtk_container_add(GTK_CONTAINER(ui->main_window),
+                      GTK_WIDGET(ui->layout_container));
+}
+
+/* Create a container for the system information & current time.
+ *
+ * Set the system information text by querying LightDM & the Config, but leave
+ * the time blank & let the timer update it.
+ */
+static void create_and_attach_sys_info_label(Config *config, UI *ui)
+{
+    if (!config->show_sys_info) {
+        return;
+    }
+    // container for system info & time
+    ui->info_container = GTK_GRID(gtk_grid_new());
+    gtk_grid_set_column_spacing(ui->info_container, 0);
+    gtk_grid_set_row_spacing(ui->info_container, 5);
+    gtk_widget_set_name(GTK_WIDGET(ui->info_container), "info");
+
+    // system info: <user>@<hostname>
+    const gchar *hostname = lightdm_get_hostname();
+    gchar *output_string;
+    int output_string_length = asprintf(&output_string, "%s@%s",
+                                        config->login_user, hostname);
+    if (output_string_length >= 0) {
+        ui->sys_info_label = gtk_label_new(output_string);
+    } else {
+        g_warning("Could not allocate memory for system info string.");
+        ui->sys_info_label = gtk_label_new("");
+    }
+    gtk_label_set_xalign(GTK_LABEL(ui->sys_info_label), 0.0f);
+    gtk_widget_set_name(GTK_WIDGET(ui->sys_info_label), "sys-info");
+
+    // time: filled out by callback
+    ui->time_label = gtk_label_new("");
+    gtk_label_set_xalign(GTK_LABEL(ui->time_label), 1.0f);
+    gtk_widget_set_hexpand(GTK_WIDGET(ui->time_label), TRUE);
+    gtk_widget_set_name(GTK_WIDGET(ui->time_label), "time-info");
+
+    // attach labels to info container, attach info container to layout.
+    gtk_grid_attach(
+        ui->info_container, GTK_WIDGET(ui->sys_info_label), 0, 0, 1, 1);
+    gtk_grid_attach(
+        ui->info_container, GTK_WIDGET(ui->time_label), 1, 0, 1, 1);
+    gtk_grid_attach(
+        ui->layout_container, GTK_WIDGET(ui->info_container), 0, 0, 2, 1);
+}
+
+
+/* Add a label & entry field for the user's password.
+ *
+ * If the `show_password_label` member of `config` is FALSE,
+ * `ui->password_label` is left as NULL.
+ */
+static void create_and_attach_password_field(Config *config, UI *ui)
+{
+    ui->password_input = gtk_entry_new();
+    gtk_entry_set_visibility(GTK_ENTRY(ui->password_input), FALSE);
+    if (config->password_char != NULL) {
+        gtk_entry_set_invisible_char(GTK_ENTRY(ui->password_input), *config->password_char);
+    }
+    gtk_entry_set_alignment(GTK_ENTRY(ui->password_input),
+                            config->password_alignment);
+    // TODO: The width is usually a little shorter than we specify. Is there a
+    // way to force this exact character width?
+    // Maybe use 2 GtkBoxes instead of a GtkGrid?
+    gtk_entry_set_width_chars(GTK_ENTRY(ui->password_input),
+                              config->password_input_width);
+    gtk_widget_set_name(GTK_WIDGET(ui->password_input), "password");
+    const gint top = config->show_sys_info ? 1 : 0;
+    gtk_grid_attach(ui->layout_container, ui->password_input, 1, top, 1, 1);
+
+    if (config->show_password_label) {
+        ui->password_label = gtk_label_new(config->password_label_text);
+        gtk_label_set_justify(GTK_LABEL(ui->password_label), GTK_JUSTIFY_RIGHT);
+        gtk_grid_attach_next_to(ui->layout_container, ui->password_label,
+                                ui->password_input, GTK_POS_LEFT, 1, 1);
+    }
+}
+
+
+/* Add a label for feedback to the user */
+static void create_and_attach_feedback_label(UI *ui)
+{
+    ui->feedback_label = gtk_label_new("");
+    gtk_label_set_justify(GTK_LABEL(ui->feedback_label), GTK_JUSTIFY_CENTER);
+    gtk_widget_set_no_show_all(ui->feedback_label, TRUE);
+    gtk_widget_set_name(GTK_WIDGET(ui->feedback_label), "error");
+
+    GtkWidget *attachment_point;
+    gint width;
+    if (ui->password_label == NULL) {
+        attachment_point = ui->password_input;
+        width = 1;
+    } else {
+        attachment_point = ui->password_label;
+        width = 2;
+    }
+
+    gtk_grid_attach_next_to(ui->layout_container, ui->feedback_label,
+                            attachment_point, GTK_POS_BOTTOM, width, 1);
+}
+
+/* Attach a style provider to the screen, using color options from config */
+static void attach_config_colors_to_screen(Config *config)
+{
+    GtkCssProvider* provider = gtk_css_provider_new();
+
+    GdkRGBA *caret_color;
+    if (config->show_input_cursor) {
+        caret_color = config->password_color;
+    } else {
+        caret_color = config->password_background_color;
+    }
+
+    char *css;
+    int css_string_length = asprintf(&css,
+        "* {\n"
+            "font-family: %s;\n"
+            "font-size: %s;\n"
+            "font-weight: %s;\n"
+            "font-style: %s;\n"
+        "}\n"
+        "label {\n"
+            "color: %s;\n"
+        "}\n"
+        "label#error {\n"
+            "color: %s;\n"
+        "}\n"
+        "#background {\n"
+            "background-color: %s;\n"
+        "}\n"
+        "#background.with-image {\n"
+            "background-image: image(url(%s), %s);\n"
+            "background-repeat: no-repeat;\n"
+            "background-size: %s;\n"
+            "background-position: center;\n"
+        "}\n"
+        "#main, #password {\n"
+            "border-width: %s;\n"
+            "border-color: %s;\n"
+            "border-style: solid;\n"
+        "}\n"
+        "#main {\n"
+            "background-color: %s;\n"
+        "}\n"
+        "#password {\n"
+            "color: %s;\n"
+            "caret-color: %s;\n"
+            "background-color: %s;\n"
+            "border-width: %s;\n"
+            "border-color: %s;\n"
+            "border-radius: %s;\n"
+            "background-image: none;\n"
+            "box-shadow: none;\n"
+            "border-image-width: 0;\n"
+        "}\n"
+        "#info {\n"
+            "margin: %s;\n"
+        "}\n"
+        "#info label {\n"
+            "font-family: %s;\n"
+            "font-size: %s;\n"
+            "color: %s;\n"
+        "}\n"
+
+        // *
+        , config->font
+        , config->font_size
+        , config->font_weight
+        , config->font_style
+        // label
+        , gdk_rgba_to_string(config->text_color)
+        // label#error
+        , gdk_rgba_to_string(config->error_color)
+        // #background
+        , gdk_rgba_to_string(config->background_color)
+        // #background.image-background
+        , config->background_image
+        , gdk_rgba_to_string(config->background_color)
+        , config->background_image_size
+        // #main, #password
+        , config->border_width
+        , gdk_rgba_to_string(config->border_color)
+        // #main
+        , gdk_rgba_to_string(config->window_color)
+        // #password
+        , gdk_rgba_to_string(config->password_color)
+        , gdk_rgba_to_string(caret_color)
+        , gdk_rgba_to_string(config->password_background_color)
+        , config->password_border_width
+        , gdk_rgba_to_string(config->password_border_color)
+        , config->password_border_radius
+        // #info
+        , config->sys_info_margin
+        // #info label
+        , config->sys_info_font
+        , config->sys_info_font_size
+        , gdk_rgba_to_string(config->sys_info_color)
+    );
+
+    if (css_string_length >= 0) {
+        gtk_css_provider_load_from_data(provider, css, -1, NULL);
+
+        GdkScreen *screen = gdk_screen_get_default();
+        gtk_style_context_add_provider_for_screen(
+            screen, GTK_STYLE_PROVIDER(provider),
+            GTK_STYLE_PROVIDER_PRIORITY_USER + 1);
+    }
+
+
+    g_object_unref(provider);
+}
diff --git a/src/ui.h b/src/ui.h
new file mode 100644
index 0000000..3d84aaf
--- /dev/null
+++ b/src/ui.h
@@ -0,0 +1,24 @@
+#ifndef UI_H
+#define UI_H
+
+#include <gtk/gtk.h>
+#include "config.h"
+
+
+typedef struct UI_ {
+    GtkWindow   **background_windows;
+    int         monitor_count;
+    GtkWindow   *main_window;
+    GtkGrid     *layout_container;
+    GtkGrid     *info_container;
+    GtkWidget   *sys_info_label;
+    GtkWidget   *time_label;
+    GtkWidget   *password_label;
+    GtkWidget   *password_input;
+    GtkWidget   *feedback_label;
+} UI;
+
+
+UI *initialize_ui(Config *config);
+
+#endif
diff --git a/src/utils.c b/src/utils.c
new file mode 100644
index 0000000..38a34de
--- /dev/null
+++ b/src/utils.c
@@ -0,0 +1,70 @@
+/* General Utility Functions */
+#include <lightdm.h>
+
+#include "app.h"
+#include "compat.h"
+#include "lightdm/session.h"
+#include "utils.h"
+#include "focus_ring.h"
+
+static gchar *get_session_key(gconstpointer data);
+
+
+/* Connect to the LightDM daemon or exit with an error */
+void connect_to_lightdm_daemon(LightDMGreeter *greeter)
+{
+    if (!lightdm_greeter_connect_sync(greeter, NULL)) {
+        g_critical("Could not connect to the LightDM daemon");
+    }
+}
+
+
+/* Begin authentication as the default user, or exit with an error */
+void begin_authentication_as_default_user(App *app)
+{
+    const gchar *default_user = APP_LOGIN_USER(app);
+    if (g_strcmp0(default_user, NULL) == 0) {
+        g_critical("A default user has not been not set");
+    } else {
+        g_message("Beginning authentication as the default user: %s",
+                  default_user);
+        compat_greeter_authenticate(app->greeter, default_user, NULL);
+    }
+}
+
+
+/* Remove every occurence of a character from a string */
+void remove_char(char *str, char garbage) {
+
+    char *src, *dst;
+    for (src = dst = str; *src != '\0'; src++) {
+        *dst = *src;
+        if (*dst != garbage) dst++;
+    }
+    *dst = '\0';
+}
+
+
+/* Get Sessions & Build the Focus Ring */
+void make_session_focus_ring(App *app)
+{
+    const gchar *default_session =
+            lightdm_greeter_get_default_session_hint(app->greeter);
+    const GList *sessions = lightdm_get_sessions();
+    FocusRing *session_ring = initialize_focus_ring(sessions, &get_session_key, "sessions");
+
+    if (default_session != NULL) {
+        focus_ring_scroll_to_value(session_ring, default_session);
+    }
+    g_message("Initial session set to: %s", focus_ring_get_value(session_ring));
+
+    app->session_ring = session_ring;
+}
+/* Retrieves the `key` field of a session, used to pull current session out of
+ * a FocusRing.
+ */
+static gchar *get_session_key(gconstpointer data)
+{
+    LightDMSession *session = (LightDMSession *) data;
+    return (gchar *) lightdm_session_get_key(session);
+}
diff --git a/src/utils.h b/src/utils.h
new file mode 100644
index 0000000..6351e7c
--- /dev/null
+++ b/src/utils.h
@@ -0,0 +1,14 @@
+#ifndef UTILS_H
+#define UTILS_H
+
+#include <lightdm.h>
+
+#include "app.h"
+
+
+void connect_to_lightdm_daemon(LightDMGreeter *greeter);
+void make_session_focus_ring(App *app);
+void begin_authentication_as_default_user(App *app);
+void remove_char(char *str, char garbage);
+
+#endif