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@@ -0,0 +1,112 @@# 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.
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Makefile.am (new)
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@@ -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)
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README.md (new)
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@@ -0,0 +1,235 @@# Mini-Greeter [](https://aur.archlinux.org/packages/lightdm-mini-greeter) [](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  ## 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
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autogen.sh (new)
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@@ -0,0 +1,2 @@#!/bin/sh autoreconf -i
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configure.ac (new)
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@@ -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
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@@ -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
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@@ -0,0 +1,5 @@[Desktop Entry] Name=LightDM Mini Greeter Comment=A minimal, highly configurable GTK3 greeter Exec=lightdm-mini-greeter Type=Application
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debian/changelog (new)
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@@ -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
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debian/compat (new)
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@@ -0,0 +1,1 @@9
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debian/control (new)
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@@ -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
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debian/copyright (new)
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@@ -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+
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debian/postinst (new)
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@@ -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
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debian/prerm (new)
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@@ -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
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debian/rules (new)
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@@ -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
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debian/source/format (new)
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@@ -0,0 +1,1 @@3.0 (quilt)
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screenshot.png (new)
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src/app.c (new)
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@@ -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); }
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src/app.h (new)
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@@ -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
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src/callbacks.c (new)
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@@ -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); }
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src/callbacks.h (new)
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@@ -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
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src/compat.c (new)
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@@ -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 }
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src/compat.h (new)
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@@ -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
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src/config.c (new)
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@@ -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; }
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src/config.h (new)
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@@ -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
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src/focus_ring.c (new)
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@@ -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); }
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src/focus_ring.h (new)
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@@ -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
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src/main.c (new)
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@@ -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); }
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src/ui.c (new)
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@@ -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); }
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src/ui.h (new)
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@@ -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
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src/utils.c (new)
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@@ -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); }
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src/utils.h (new)
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@@ -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
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