Merge lp:~kalgasnik/lightdm-gtk-greeter/post-2.0.0 into lp:lightdm-gtk-greeter

[Andrew P.]

1. Greeter can go to infinite loop at launch when used with two monitors in mirrored mode and active-monitor=#cursor

http://ubuntuforums.org/showthread.php?t=2268061
http://forum.ubuntuusers.de/topic/loginbildschirm-weis-erst-nach-rechtsklick-sic/
http://ubuntuforums.org/showthread.php?t=2267474
https://bugs.archlinux.org/task/43999

2. gtk_widget_reparent marked as deprecated in 3.14 but gtk_container_remove/add is not equal replacement if widget contains GtkPlug.
gtk_widget_reparent used in greeter to move screen_overlay from on monitor window to another.
Looks like remove/add leaves GtkPlug in invalid state.

http://i.imgur.com/E7BtTRx.png
http://i.imgur.com/dlvjay5.png

3. Sending "WM_TAKE_FOCUS" to active monitor window, "onboard" just doesn't work in xembed mode without it.

4. Greeter doesn't lose focus when monitors configuration changed.

5. Multiple configuration files. Order:
g_get_system_data_dirs():
.../lightdm/lightdm-gtk-greeter.conf.d/*.conf
.../lightdm/lightdm-gtk-greeter.conf
g_get_system_config_dirs():
.../lightdm/lightdm-gtk-greeter.conf.d/*.conf
.../lightdm/lightdm-gtk-greeter.conf
/etc/lightdm/lightdm-gtk-greeter.conf.d/*.conf
/etc/lightdm/lightdm-gtk-greeter.conf

Sample:
/usr/share/lightdm/lightdm-gtk-greeter.conf.d/a.conf
/etc/xdg/lightdm/lightdm-gtk-greeter.conf.d/1.conf
/etc/xdg/lightdm/lightdm-gtk-greeter.conf.d/2.conf
/etc/xdg/lightdm/lightdm-gtk-greeter.conf
/etc/lightdm/lightdm-gtk-greeter.conf.d/arch.conf
/etc/lightdm/lightdm-gtk-greeter.conf

[lp:~kalgasnik/lightdm-gtk-greeter/post-2.0.0]

325. By Andrew P. on 2015-03-27

conf.d support (LP: #1421587)

[Simon Steinbeiß (ochosi)]

Hey Andrew!
This is a huge amount of changes so I guess the branch-name is accurate :)
I wonder whether we could rip out some parts of it as bugfix for 2.0 and then do a bugfix release for it which we could then still upload to 15.04. Would that be possible?

[Sean Davis (bluesabre)]

Simon,

Actually, other than the configuration location (not really a "feature"), I'd say these are all bug fixes.

#1 is a critical bug that can leave the greeter completely non-functional.
#2 and #3 break accessibility by making the on-screen keyboard unusable.
#4 means that keyboard input would be lost without using a mouse.

I haven't tested the branch yet, but these all sound reasonable to me. I'll test it out this weekend.

[lp:~kalgasnik/lightdm-gtk-greeter/post-2.0.0]

326. By Andrew P. on 2015-03-29

Fallback if no .conf files found

[Sean Davis (bluesabre)]

I just tested this branch with a second monitor. It seems the white screen bug is still present.

[Andrew P. (kalgasnik)]

Log with allow-debugging=true?
Is it white "need to click or use active-monitor=0" screen?

[Sean Davis (bluesabre)]

I think I had some other components interfering. This time I built a proper package and installed it over a clean system, and everything seems to be okay. Going to merge this one in.

review: Approve

=== modified file 'src/Makefile.am'
--- src/Makefile.am	2014-11-04 11:38:36 +0000
+++ src/Makefile.am	2015-03-29 05:44:39 +0000
@@ -10,6 +10,8 @@
 	lightdm-gtk-greeter.c \
 	greeterbackground.c \
 	greeterbackground.h \
+	greeterconfiguration.c \
+	greeterconfiguration.h \
 	greetermenubar.c \
 	greetermenubar.h
 

=== modified file 'src/greeterbackground.c'
--- src/greeterbackground.c	2014-12-10 07:59:02 +0000
+++ src/greeterbackground.c	2015-03-29 05:44:39 +0000
@@ -58,7 +58,7 @@
 } BackgroundConfig;
 
 /* Transition configuration
-   Used to as part of <MonitorConfig> and <Monitor> */
+   Used as part of <MonitorConfig> and <Monitor> */
 typedef struct
 {
     /* Transition duration, in ms */
@@ -177,9 +177,6 @@
     gboolean follow_cursor;
     /* Use cursor position to determinate initial active monitor */
     gboolean follow_cursor_to_init;
-
-    /* Name => transition function, inited in set_monitor_config() */
-    GHashTable* transition_types;
 };
 
 enum
@@ -205,10 +202,10 @@
 void greeter_background_set_monitor_config          (GreeterBackground* background,
                                                      const gchar* name,
                                                      const gchar* bg,               /* NULL to use fallback value */
-                                                     gboolean user_bg, gboolean user_bg_used,
-                                                     gboolean laptop, gboolean laptop_used,
+                                                     gint user_bg,                  /* -1 to use fallback value */
+                                                     gint laptop,                   /* -1 to use fallback value */
                                                      gint transition_duration,      /* -1 to use fallback value */
-                                                     const gchar* transition_type); /* NULL to use fallback value */
+                                                     TransitionType transition_type); /* NULL to use fallback value */
 void greeter_background_remove_monitor_config       (GreeterBackground* background,
                                                      const gchar* name);
 gchar** greeter_background_get_configured_monitors  (GreeterBackground* background);
@@ -296,7 +293,7 @@
 static void set_surface_as_root                     (GdkScreen* screen,
                                                      cairo_surface_t* surface);
 static gdouble transition_func_linear               (gdouble x);
-static gdouble transition_func_easy_in_out          (gdouble x);
+static gdouble transition_func_ease_in_out          (gdouble x);
 
 /* Implemented in lightdm-gtk-greeter.c */
 gpointer greeter_save_focus(GtkWidget* widget);
@@ -317,7 +314,7 @@
     .transition =
     {
         .duration = 500,
-        .func = transition_func_easy_in_out,
+        .func = transition_func_ease_in_out,
         .draw = (TransitionDraw)monitor_transition_draw_alpha
     }
 };
@@ -413,10 +410,10 @@
 greeter_background_set_monitor_config(GreeterBackground* background,
                                       const gchar* name,
                                       const gchar* bg,
-                                      gboolean user_bg, gboolean user_bg_used,
-                                      gboolean laptop, gboolean laptop_used,
+                                      gint user_bg,
+                                      gint laptop,
                                       gint transition_duration,
-                                      const gchar* transition_type)
+                                      TransitionType transition_type)
 {
     g_return_if_fail(GREETER_IS_BACKGROUND(background));
     GreeterBackgroundPrivate* priv = background->priv;
@@ -427,29 +424,22 @@
 
     if(!background_config_initialize(&config->bg, bg))
         background_config_copy(&FALLBACK->bg, &config->bg);
-    config->user_bg = user_bg_used ? user_bg : FALLBACK->user_bg;
-    config->laptop = laptop_used ? laptop : FALLBACK->laptop;
+    config->user_bg = user_bg >= 0 ? user_bg : FALLBACK->user_bg;
+    config->laptop = laptop >= 0 ? laptop : FALLBACK->laptop;
     config->transition.duration = transition_duration >= 0 ? transition_duration : FALLBACK->transition.duration;
     config->transition.draw = FALLBACK->transition.draw;
 
-    if(transition_type)
+    switch(transition_type)
     {
-        if(!priv->transition_types)
-        {
-            priv->transition_types = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, NULL);
-            g_hash_table_insert(priv->transition_types, g_strdup("none"), NULL);
-            g_hash_table_insert(priv->transition_types, g_strdup("linear"), transition_func_linear);
-            g_hash_table_insert(priv->transition_types, g_strdup("easy-in-out"), transition_func_easy_in_out);
-        }
-        if(!g_hash_table_lookup_extended(priv->transition_types, transition_type, NULL, (gpointer*)&config->transition.func))
-        {
-            g_warning("[Background] Invalid transition type for '%s' monitor: '%s'. Using fallback value.",
-                      name, transition_type);
+        case TRANSITION_TYPE_NONE:
+            config->transition.func = NULL; break;
+        case TRANSITION_TYPE_LINEAR:
+            config->transition.func = transition_func_linear; break;
+        case TRANSITION_TYPE_EASE_IN_OUT:
+            config->transition.func = transition_func_ease_in_out; break;
+        default:
             config->transition.func = FALLBACK->transition.func;
-        }
     }
-    else
-        config->transition.func = FALLBACK->transition.func;
 
     if(FALLBACK == priv->default_config)
         g_hash_table_insert(priv->configs, g_strdup(name), config);
@@ -495,12 +485,18 @@
     g_return_if_fail(GREETER_IS_BACKGROUND(background));
     g_return_if_fail(GDK_IS_SCREEN(screen));
 
-    g_debug("[Background] Connecting to screen: %p", screen);
+    g_debug("[Background] Connecting to screen: %p (%dx%dpx, %dx%dmm)", screen,
+            gdk_screen_get_width(screen), gdk_screen_get_height(screen),
+            gdk_screen_get_width_mm(screen), gdk_screen_get_height_mm(screen));
 
     GreeterBackgroundPrivate* priv = background->priv;
-
+    gpointer saved_focus = NULL;
     if(priv->screen)
+    {
+        if (priv->active_monitor)
+            saved_focus = greeter_save_focus(priv->child);
         greeter_background_disconnect(background);
+    }
 
     priv->screen = screen;
     priv->monitors_size = gdk_screen_get_n_monitors(screen);
@@ -513,7 +509,9 @@
     Monitor* first_not_skipped_monitor = NULL;
 
     GHashTable* images_cache = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_object_unref);
+    cairo_region_t *screen_region = cairo_region_create();
     gint i;
+
     for(i = 0; i < priv->monitors_size; ++i)
     {
         const MonitorConfig* config;
@@ -553,6 +551,15 @@
                 config = &DEFAULT_MONITOR_CONFIG;
         }
 
+        /* Simple check to skip fully overlapped monitors.
+           Actually, it's can track only monitors in "mirrors" mode. Nothing more. */
+        if(cairo_region_contains_rectangle(screen_region, &monitor->geometry) == CAIRO_REGION_OVERLAP_IN)
+        {
+            g_debug("[Background] Skipping monitor %s #%d, its area is already used by other monitors", printable_name, i);
+            continue;
+        }
+        cairo_region_union_rectangle(screen_region, &monitor->geometry);
+
         if(!first_not_skipped_monitor)
             first_not_skipped_monitor = monitor;
 
@@ -578,9 +585,8 @@
         for(item = priv->accel_groups; item != NULL; item = g_slist_next(item))
             gtk_window_add_accel_group(monitor->window, item->data);
 
-        if(priv->follow_cursor)
-            g_signal_connect(G_OBJECT(monitor->window), "enter-notify-event",
-                             G_CALLBACK(monitor_window_enter_notify_cb), monitor);
+        g_signal_connect(G_OBJECT(monitor->window), "enter-notify-event",
+                         G_CALLBACK(monitor_window_enter_notify_cb), monitor);
 
         if(config->user_bg)
             priv->customized_monitors = g_slist_prepend(priv->customized_monitors, monitor);
@@ -624,9 +630,16 @@
             }
         }
     }
+
     if(!priv->active_monitor)
         greeter_background_set_active_monitor(background, NULL);
 
+    if(saved_focus)
+    {
+        greeter_restore_focus(saved_focus);
+        g_free(saved_focus);
+    }
+
     priv->screen_monitors_changed_handler_id = g_signal_connect(G_OBJECT(screen), "monitors-changed",
                                                                 G_CALLBACK(greeter_background_monitors_changed_cb),
                                                                 background);
@@ -768,8 +781,9 @@
         gpointer focus = greeter_save_focus(priv->child);
 
         if(old_parent)
-            gtk_container_remove(GTK_CONTAINER(old_parent), priv->child);
-        gtk_container_add(GTK_CONTAINER(active->window), priv->child);
+            gtk_widget_reparent(priv->child, GTK_WIDGET(active->window));
+        else
+            gtk_container_add(GTK_CONTAINER(active->window), priv->child);
 
         gtk_window_present(active->window);
         greeter_restore_focus(focus);
@@ -1393,8 +1407,30 @@
                                GdkEventCrossing* event,
                                const Monitor* monitor)
 {
-    if(monitor->object->priv->active_monitor != monitor &&
-       greeter_background_monitor_enabled(monitor->object, monitor))
+    if(monitor->object->priv->active_monitor == monitor)
+    {
+        GdkWindow *gdkwindow = gtk_widget_get_window (widget);
+        Window window = GDK_WINDOW_XID (gdkwindow);
+        Display *display = GDK_WINDOW_XDISPLAY (gdkwindow);
+
+        static Atom wm_protocols = None;
+        static Atom wm_take_focus = None;
+
+        if (!wm_protocols)
+            wm_protocols = XInternAtom(display, "WM_PROTOCOLS", False);
+        if (!wm_take_focus)
+            wm_take_focus = XInternAtom(display, "WM_TAKE_FOCUS", False);
+
+        XEvent ev = {0};
+        ev.xclient.type = ClientMessage;
+        ev.xclient.window = window;
+        ev.xclient.message_type = wm_protocols;
+        ev.xclient.format = 32;
+        ev.xclient.data.l[0] = wm_take_focus;
+        ev.xclient.data.l[1] = CurrentTime;
+        XSendEvent(display, window, False, 0L, &ev);
+    }
+    else if(monitor->object->priv->follow_cursor && greeter_background_monitor_enabled(monitor->object, monitor))
         greeter_background_set_active_monitor(monitor->object, monitor);
     return FALSE;
 }
@@ -1633,7 +1669,7 @@
 }
 
 static gdouble
-transition_func_easy_in_out(gdouble x)
+transition_func_ease_in_out(gdouble x)
 {
     return (1 - cos(M_PI*x))/2;
 }

=== modified file 'src/greeterbackground.h'
--- src/greeterbackground.h	2014-11-03 10:39:58 +0000
+++ src/greeterbackground.h	2015-03-29 05:44:39 +0000
@@ -14,6 +14,19 @@
 
 #define GREETER_BACKGROUND_DEFAULT          "*"
 
+typedef enum
+{
+    TRANSITION_TYPE_NONE,
+    TRANSITION_TYPE_EASE_IN_OUT,
+    TRANSITION_TYPE_LINEAR,
+    TRANSITION_TYPE_FALLBACK
+} TransitionType;
+
+typedef enum
+{
+    TRANSITION_EFFECT_NONE,
+} TransitionEffect;
+
 typedef struct _GreeterBackground           GreeterBackground;
 typedef struct _GreeterBackgroundClass      GreeterBackgroundClass;
 
@@ -25,10 +38,10 @@
 void greeter_background_set_monitor_config          (GreeterBackground* background,
                                                      const gchar* name,
                                                      const gchar* bg,
-                                                     gboolean user_bg, gboolean user_bg_used,
-                                                     gboolean laptop, gboolean laptop_used,
+                                                     gint user_bg,
+                                                     gint laptop,
                                                      gint transition_duration,
-                                                     const gchar* transition_func);
+                                                     TransitionType transition_type);
 void greeter_background_remove_monitor_config       (GreeterBackground* background,
                                                      const gchar* name);
 gchar** greeter_background_get_configured_monitors  (GreeterBackground* background);

=== added file 'src/greeterconfiguration.c'
--- src/greeterconfiguration.c	1970-01-01 00:00:00 +0000
+++ src/greeterconfiguration.c	2015-03-29 05:44:39 +0000
@@ -0,0 +1,371 @@
+
+#include <glib.h>
+
+#include "greeterconfiguration.h"
+
+
+static GKeyFile* greeter_config = NULL;
+static GKeyFile* state_config = NULL;
+static gchar* state_filename = NULL;
+
+static GKeyFile* get_file_for_group (const gchar** group);
+static void save_key_file           (GKeyFile* config, const gchar* path);
+static gboolean get_int             (GKeyFile* config, const gchar* group, const gchar* key, gint* out);
+static gboolean get_bool            (GKeyFile* config, const gchar* group, const gchar* key, gboolean* out);
+
+/* Implementation */
+
+static GList*
+append_directory_content(GList* files, const gchar* path)
+{
+    GError* error = NULL;
+    gchar* full_path = g_build_filename(path, "lightdm", "lightdm-gtk-greeter.conf.d", NULL);
+    GDir* dir = g_dir_open(full_path, 0, &error);
+    if(error && !g_error_matches(error, G_FILE_ERROR, G_FILE_ERROR_NOENT))
+        g_warning("[Configuration] Failed to read configuration directory '%s': %s", full_path, error->message);
+    g_clear_error(&error);
+
+    GList* content = NULL;
+    if(dir)
+    {
+        const gchar *name;
+        while((name = g_dir_read_name(dir)))
+        {
+            if(!g_str_has_suffix(name, ".conf"))
+                continue;
+            content = g_list_prepend(content, g_build_filename(full_path, name, NULL));
+        }
+        g_dir_close(dir);
+
+        if(content)
+            content = g_list_sort(content, (GCompareFunc)g_strcmp0);
+    }
+
+    content = g_list_append(content, g_build_filename(path, "lightdm", "lightdm-gtk-greeter.conf", NULL));
+
+    GList* list_iter;
+    for(list_iter = content; list_iter; list_iter = g_list_next(list_iter))
+    {
+        if(g_file_test(list_iter->data, G_FILE_TEST_IS_REGULAR))
+            files = g_list_prepend(files, list_iter->data);
+        else
+            g_free(list_iter->data);
+    }
+
+    g_list_free(content);
+    g_free(full_path);
+    return files;
+}
+
+void
+config_init(void)
+{
+    GError* error = NULL;
+
+    gchar* state_config_dir = g_build_filename(g_get_user_cache_dir(), "lightdm-gtk-greeter", NULL);
+    state_filename = g_build_filename(state_config_dir, "state", NULL);
+    g_mkdir_with_parents(state_config_dir, 0775);
+    g_free(state_config_dir);
+
+    state_config = g_key_file_new();
+    g_key_file_load_from_file(state_config, state_filename, G_KEY_FILE_NONE, &error);
+    if (error && !g_error_matches(error, G_FILE_ERROR, G_FILE_ERROR_NOENT))
+        g_warning("[Configuration] Failed to load state from %s: %s", state_filename, error->message);
+    g_clear_error(&error);
+
+
+    gint i;
+    GList* files = NULL;
+
+    const gchar* const* dirs = g_get_system_data_dirs();
+    for(i = 0; dirs[i]; ++i)
+        files = append_directory_content(files, dirs[i]);
+
+    dirs = g_get_system_config_dirs();
+    for(i = 0; dirs[i]; ++i)
+        files = append_directory_content(files, dirs[i]);
+
+    gchar* config_path_tmp = g_path_get_dirname(CONFIG_FILE);
+    gchar* config_path = g_path_get_dirname(config_path_tmp);
+    files = append_directory_content(files, config_path);
+    g_free(config_path_tmp);
+    g_free(config_path);
+
+    files = g_list_reverse(files);
+
+    GKeyFile* tmp_config = NULL;
+    GList* file_iter = NULL;
+    for(file_iter = files; file_iter; file_iter = g_list_next(file_iter))
+    {
+        const gchar* path = file_iter->data;
+
+        if(!tmp_config)
+            tmp_config = g_key_file_new();
+
+        if(!g_key_file_load_from_file(tmp_config, path, G_KEY_FILE_NONE, &error))
+        {
+            if(error)
+            {
+                g_warning("[Configuration] Failed to read file '%s': %s", path, error->message);
+                g_clear_error(&error);
+            }
+            else
+                g_warning("[Configuration] Failed to read file '%s'", path);
+            continue;
+        }
+        g_message("[Configuration] Reading file: %s", path);
+
+        if(!greeter_config)
+        {
+            greeter_config = tmp_config;
+            tmp_config = NULL;
+            continue;
+        }
+
+        gchar** group_iter = NULL;
+        gchar** groups = g_key_file_get_groups(tmp_config, NULL);
+        for(group_iter = groups; *group_iter; ++group_iter)
+        {
+            if(**group_iter == '-')
+            {
+                g_key_file_remove_group(greeter_config, *group_iter + 1, NULL);
+                continue;
+            }
+
+            gchar** key_iter = NULL;
+            gchar** keys = g_key_file_get_keys(tmp_config, *group_iter, NULL, NULL);
+            for(key_iter = keys; *key_iter; ++key_iter)
+            {
+                if(**key_iter == '-')
+                {
+                    g_key_file_remove_key(greeter_config, *group_iter, *key_iter + 1, NULL);
+                    continue;
+                }
+
+                gchar* value = g_key_file_get_value(tmp_config, *group_iter, *key_iter, NULL);
+                if(value)
+                {
+                    g_key_file_set_value(greeter_config, *group_iter, *key_iter, value);
+                    g_free(value);
+                }
+            }
+            g_strfreev(keys);
+        }
+        g_strfreev(groups);
+    }
+    if (tmp_config)
+        g_key_file_unref(tmp_config);
+    g_list_free_full(files, g_free);
+
+    if(!greeter_config)
+        greeter_config = g_key_file_new();
+}
+
+static GKeyFile*
+get_file_for_group(const gchar** group)
+{
+    if(!*group)
+        *group = CONFIG_GROUP_DEFAULT;
+
+    if(*group[0] == '/')
+    {
+        (*group)++;
+        return state_config;
+    }
+
+    return greeter_config;
+}
+
+static void
+save_key_file(GKeyFile* config, const gchar* path)
+{
+    GError* error = NULL;
+    gsize data_length = 0;
+    gchar* data = g_key_file_to_data(config, &data_length, &error);
+
+    if(error)
+    {
+        g_warning("[Configuration] Failed to save file: %s", error->message);
+        g_clear_error(&error);
+    }
+
+    if(data)
+    {
+        g_file_set_contents(path, data, data_length, &error);
+        if(error)
+        {
+            g_warning("[Configuration] Failed to save file: %s", error->message);
+            g_clear_error(&error);
+        }
+        g_free(data);
+    }
+}
+
+static gboolean
+get_int(GKeyFile* config, const gchar* group, const gchar* key, gint* out)
+{
+    GError* error = NULL;
+    *out = g_key_file_get_integer(config, group, key, &error);
+    if(!error)
+        return TRUE;
+    if(g_error_matches(error, G_KEY_FILE_ERROR, G_KEY_FILE_ERROR_INVALID_VALUE))
+        g_warning("[Configuration] Failed to parse integer value [%s] %s: %s", group, key, error->message);
+    g_clear_error(&error);
+    return FALSE;
+}
+
+static gboolean
+get_bool(GKeyFile* config, const gchar* group, const gchar* key, gboolean* out)
+{
+    GError* error = NULL;
+    *out = g_key_file_get_boolean(config, group, key, &error);
+    if(!error)
+        return TRUE;
+    if(g_error_matches(error, G_KEY_FILE_ERROR, G_KEY_FILE_ERROR_INVALID_VALUE))
+        g_warning("[Configuration] Failed to parse boolean value [%s] %s: %s", group, key, error->message);
+    g_clear_error(&error);
+    return FALSE;
+}
+
+gchar**
+config_get_groups(const gchar* prefix)
+{
+    gsize groups_size = 0, i, next;
+    gchar** groups = g_key_file_get_groups(greeter_config, &groups_size);
+
+    for(i = next = 0; i < groups_size; ++i)
+        if(groups[i] && g_str_has_prefix(groups[i], prefix))
+        {
+            if(i != next)
+            {
+                g_free (groups[next]);
+                groups[next] = groups[i];
+                groups[i] = NULL;
+            }
+            ++next;
+        }
+
+    if(groups)
+        groups[next] = NULL;
+
+    return groups;
+}
+
+gboolean
+config_has_key(const gchar* group, const gchar* key)
+{
+    GKeyFile* file = get_file_for_group(&group);
+    return g_key_file_has_key(file, group, key, NULL);
+}
+
+gchar*
+config_get_string(const gchar* group, const gchar* key, const gchar* fallback)
+{
+    GKeyFile* file = get_file_for_group(&group);
+    gchar* value = g_key_file_get_value(file, group, key, NULL);
+    return value || !fallback ? value : g_strdup(fallback);
+}
+
+void
+config_set_string(const gchar* group, const gchar* key, const gchar* value)
+{
+    if(get_file_for_group(&group) != state_config)
+    {
+        g_warning("[Configuration] %s(%s, %s, '%s')", __func__, group, key, value);
+        return;
+    }
+
+    g_key_file_set_value(state_config, group, key, value);
+    save_key_file(state_config, state_filename);
+}
+
+gchar**
+config_get_string_list(const gchar* group, const gchar* key, gchar** fallback)
+{
+    GKeyFile* file = get_file_for_group(&group);
+    gchar** value = g_key_file_get_string_list(file, group, key, NULL, NULL);
+    return value || !fallback ? value : g_strdupv(fallback);
+}
+
+gint
+config_get_int(const gchar* group, const gchar* key, gint fallback)
+{
+    GKeyFile* file = get_file_for_group(&group);
+    gint value;
+    if(!get_int(file, group, key, &value))
+        return fallback;
+    return value;
+}
+
+void
+config_set_int(const gchar* group, const gchar* key, gint value)
+{
+    if(get_file_for_group(&group) != state_config)
+    {
+        g_warning("[Configuration] %s(%s, %s, %d)", __func__, group, key, value);
+        return;
+    }
+
+    g_key_file_set_integer(state_config, group, key, value);
+    save_key_file(state_config, state_filename);
+}
+
+gboolean
+config_get_bool(const gchar* group, const gchar* key, gboolean fallback)
+{
+    GKeyFile* file = get_file_for_group(&group);
+    gboolean value;
+    if(!get_bool(file, group, key, &value))
+        return fallback;
+    return value;
+}
+
+void
+config_set_bool(const gchar* group, const gchar* key, gboolean value)
+{
+    if(get_file_for_group(&group) != state_config)
+    {
+        g_warning("[Configuration] %s(%s, %s, %d)", __func__, group, key, value);
+        return;
+    }
+
+    g_key_file_set_boolean(state_config, group, key, value);
+    save_key_file(state_config, state_filename);
+}
+
+gint
+config_get_enum(const gchar* group, const gchar* key, gint fallback, const gchar* first_item, ...)
+{
+    if(!first_item)
+        return fallback;
+
+    GKeyFile* file = get_file_for_group(&group);
+    gchar* value = g_key_file_get_value(file, group, key, NULL);
+
+    if(!value)
+        return fallback;
+
+    va_list var_args;
+    va_start(var_args, first_item);
+
+    gboolean found = FALSE;
+    const gchar* item_name = first_item;
+    while(item_name)
+    {
+        gint item_value = va_arg(var_args, gint);
+        if(g_strcmp0(value, item_name) == 0)
+        {
+            found = TRUE;
+            fallback = item_value;
+            break;
+        }
+        item_name = va_arg(var_args, gchar*);
+    }
+    va_end(var_args);
+
+    if(!found)
+        g_warning("[Configuration] Failed to parse enum value [%s] %s: %s", group, key, value);
+
+    return fallback;
+}
+

=== added file 'src/greeterconfiguration.h'
--- src/greeterconfiguration.h	1970-01-01 00:00:00 +0000
+++ src/greeterconfiguration.h	2015-03-29 05:44:39 +0000
@@ -0,0 +1,57 @@
+
+#ifndef GREETER_CONFIGURATION_H
+#define GREETER_CONFIGURATION_H
+
+#include <glib.h>
+
+
+#define CONFIG_GROUP_DEFAULT            "greeter"
+#define CONFIG_KEY_INDICATORS           "indicators"
+#define CONFIG_KEY_DEBUGGING            "allow-debugging"
+#define CONFIG_KEY_SCREENSAVER_TIMEOUT  "screensaver-timeout"
+#define CONFIG_KEY_THEME                "theme-name"
+#define CONFIG_KEY_ICON_THEME           "icon-theme-name"
+#define CONFIG_KEY_FONT                 "font-name"
+#define CONFIG_KEY_DPI                  "xft-dpi"
+#define CONFIG_KEY_ANTIALIAS            "xft-antialias"
+#define CONFIG_KEY_HINT_STYLE           "xft-hintstyle"
+#define CONFIG_KEY_RGBA                 "xft-rgba"
+#define CONFIG_KEY_HIDE_USER_IMAGE      "hide-user-image"
+#define CONFIG_KEY_DEFAULT_USER_IMAGE   "default-user-image"
+#define CONFIG_KEY_KEYBOARD             "keyboard"
+#define CONFIG_KEY_READER               "reader"
+#define CONFIG_KEY_CLOCK_FORMAT         "clock-format"
+#define CONFIG_KEY_ACTIVE_MONITOR       "active-monitor"
+#define CONFIG_KEY_POSITION             "position"
+#define CONFIG_KEY_PANEL_POSITION       "panel-position"
+#define CONFIG_KEY_KEYBOARD_POSITION    "keyboard-position"
+#define CONFIG_KEY_A11Y_STATES          "a11y-states"
+
+#define CONFIG_GROUP_MONITOR            "monitor:"
+#define CONFIG_KEY_BACKGROUND           "background"
+#define CONFIG_KEY_USER_BACKGROUND      "user-background"
+#define CONFIG_KEY_LAPTOP               "laptop"
+#define CONFIG_KEY_T_TYPE               "transition-type"
+#define CONFIG_KEY_T_DURATION           "transition-duration"
+
+#define STATE_SECTION_GREETER           "/greeter"
+#define STATE_SECTION_A11Y              "/a11y-states"
+#define STATE_KEY_LAST_USER             "last-user"
+#define STATE_KEY_LAST_SESSION          "last-session"
+
+
+void config_init                (void);
+
+gchar** config_get_groups       (const gchar* prefix);
+gboolean config_has_key         (const gchar* group, const gchar* key);
+
+gchar* config_get_string        (const gchar* group, const gchar* key, const gchar* fallback);
+void config_set_string          (const gchar* group, const gchar* key, const gchar* value);
+gchar** config_get_string_list  (const gchar* group, const gchar* key, gchar** fallback);
+gint config_get_int             (const gchar* group, const gchar* key, gint fallback);
+void config_set_int             (const gchar* group, const gchar* key, gint value);
+gboolean config_get_bool        (const gchar* group, const gchar* key, gboolean fallback);
+void config_set_bool            (const gchar* group, const gchar* key, gboolean value);
+gint config_get_enum            (const gchar* group, const gchar* key, gint fallback, const gchar* first_name, ...) G_GNUC_NULL_TERMINATED;
+
+#endif //GREETER_CONFIGURATION_H

=== modified file 'src/lightdm-gtk-greeter-fallback.css'
--- src/lightdm-gtk-greeter-fallback.css	2014-05-22 19:52:34 +0000
+++ src/lightdm-gtk-greeter-fallback.css	2015-03-29 05:44:39 +0000
@@ -1,12 +1,12 @@
 #layout_menuitem>GtkLabel
 {
-  border: 1px solid alpha(@menu_fg_color, 0.8);
-  border-radius: 0.5em;
-  padding: 0px 0.25em;
-  background: alpha(@menu_fg_color, 0.2);
+    border: 1px solid alpha(@menu_fg_color, 0.8);
+    border-radius: 0.5em;
+    padding: 0px 0.25em;
+    background: alpha(@menu_fg_color, 0.2);
 }
 
 #layout_menuitem
 {
-  padding: 1px;
+    padding: 1px;
 }

=== modified file 'src/lightdm-gtk-greeter.c'
--- src/lightdm-gtk-greeter.c	2015-01-26 14:41:10 +0000
+++ src/lightdm-gtk-greeter.c	2015-03-29 05:44:39 +0000
@@ -47,19 +47,16 @@
 
 #include <lightdm.h>
 
+#include "src/greeterconfiguration.h"
 #include "src/greetermenubar.h"
 #include "src/greeterbackground.h"
 #include "src/lightdm-gtk-greeter-ui.h"
 #include "src/lightdm-gtk-greeter-css-fallback.h"
 #include "src/lightdm-gtk-greeter-css-application.h"
 
+
 static LightDMGreeter *greeter;
 
-/* State file */
-static GKeyFile *state;
-static gchar *state_filename;
-static void save_state_file (void);
-
 /* List of spawned processes */
 static GSList *pids_to_close = NULL;
 static GPid spawn_argv_pid (gchar **argv, GSpawnFlags flags, gint *pfd, GError **perror);
@@ -70,7 +67,8 @@
 static void sigterm_cb (gpointer user_data);
 
 /* Screen window */
-static GtkOverlay *screen_overlay;
+static GtkOverlay   *screen_overlay;
+static GtkWidget    *screen_overlay_child;
 
 /* Login window */
 static GtkWidget    *login_window;
@@ -123,7 +121,7 @@
     DimensionPosition width, height;
 } WindowPosition;
 
-static WindowPosition* key_file_get_position (GKeyFile *key_file, const gchar *group_name, const gchar *key, const WindowPosition *default_value);
+static WindowPosition* str_to_position (const gchar *str, const WindowPosition *default_value);
 /* Function translate user defined coordinates to absolute value */
 static gint get_absolute_position (const DimensionPosition *p, gint screen, gint window);
 gboolean screen_overlay_get_child_position_cb (GtkWidget *overlay, GtkWidget *widget, GdkRectangle *allocation, gpointer user_data);
@@ -263,7 +261,7 @@
 /* Maybe unnecessary (in future) trick to enable accelerators for hidden/detached menu items */
 static void reassign_menu_item_accel (GtkWidget *item);
 
-static void init_indicators (GKeyFile* config);
+static void init_indicators (void);
 
 static void layout_selected_cb (GtkCheckMenuItem *menuitem, gpointer user_data);
 static void update_layouts_menu (void);
@@ -283,21 +281,42 @@
 void a11y_keyboard_cb (GtkCheckMenuItem *item, gpointer user_data);
 void a11y_reader_cb (GtkCheckMenuItem *item, gpointer user_data);
 
-/* Power indciator */
+/* Power indicator */
 static void power_menu_cb (GtkWidget *menuitem, gpointer userdata);
 void suspend_cb (GtkWidget *widget, LightDMGreeter *greeter);
 void hibernate_cb (GtkWidget *widget, LightDMGreeter *greeter);
 void restart_cb (GtkWidget *widget, LightDMGreeter *greeter);
 void shutdown_cb (GtkWidget *widget, LightDMGreeter *greeter);
 
+static void read_monitor_configuration (const gchar *group, const gchar *name);
+
+struct SavedFocusData
+{
+    GtkWidget *widget;
+    gint editable_pos;
+};
+
 gpointer greeter_save_focus(GtkWidget* widget);
 void greeter_restore_focus(const gpointer saved_data);
 
-struct SavedFocusData
+
+static void
+read_monitor_configuration (const gchar *group, const gchar *name)
 {
-    GtkWidget *widget;
-    gint editable_pos;
-};
+    g_debug ("[Configuration] Monitor configuration found: '%s'", name);
+
+    gchar *background = config_get_string (group, CONFIG_KEY_BACKGROUND, NULL);
+    greeter_background_set_monitor_config (greeter_background, name, background,
+                                           config_get_bool (group, CONFIG_KEY_USER_BACKGROUND, -1),
+                                           config_get_bool (group, CONFIG_KEY_LAPTOP, -1),
+                                           config_get_int (group, CONFIG_KEY_T_DURATION, -1),
+                                           config_get_enum (group, CONFIG_KEY_T_TYPE,
+                                                TRANSITION_TYPE_FALLBACK,
+                                                "none",         TRANSITION_TYPE_NONE,
+                                                "linear",       TRANSITION_TYPE_LINEAR,
+                                                "ease-in-out",  TRANSITION_TYPE_EASE_IN_OUT, NULL));
+    g_free (background);
+}
 
 gpointer
 greeter_save_focus(GtkWidget* widget)
@@ -316,43 +335,16 @@
 void
 greeter_restore_focus(const gpointer saved_data)
 {
-    if (!saved_data)
-        return;
-
     struct SavedFocusData *data = saved_data;
-    if (GTK_IS_WIDGET (data->widget))
-        gtk_widget_grab_focus (data->widget);
+
+    if (!saved_data || !GTK_IS_WIDGET (data->widget))
+        return;
+
+    gtk_widget_grab_focus (data->widget);
     if (GTK_IS_EDITABLE(data->widget) && data->editable_pos > -1)
         gtk_editable_set_position(GTK_EDITABLE(data->widget), data->editable_pos);
 }
 
-/* State file */
-
-static void
-save_state_file (void)
-{
-    GError *error = NULL;
-    gsize data_length = 0;
-    gchar *data = g_key_file_to_data (state, &data_length, &error);
-
-    if (error)
-    {
-        g_warning ("Failed to save state file: %s", error->message);
-        g_clear_error (&error);
-    }
-
-    if (data)
-    {
-        g_file_set_contents (state_filename, data, data_length, &error);
-        if (error)
-        {
-            g_warning ("Failed to save state file: %s", error->message);
-            g_clear_error (&error);
-        }
-        g_free (data);
-    }
-}
-
 /* Terminating */
 
 static GPid
@@ -564,15 +556,14 @@
 }
 
 static WindowPosition*
-key_file_get_position (GKeyFile *key_file, const gchar *group_name, const gchar *key, const WindowPosition *default_value)
+str_to_position (const gchar *str, const WindowPosition *default_value)
 {
     WindowPosition* pos = g_new0 (WindowPosition, 1);
-    gchar *value = g_key_file_get_value (key_file, group_name, key, NULL);
-
     *pos = *default_value;
 
-    if (value)
+    if (str)
     {
+        gchar *value = g_strdup (str);
         gchar *x = value;
         gchar *y = strchr (value, ' ');
         if (y)
@@ -732,7 +723,7 @@
             }
             else
             {
-                g_warning ("Failed to load user image: %s", error->message);
+                g_debug ("Failed to load user image: %s", error->message);
                 g_clear_error (&error);
             }
         }
@@ -849,6 +840,7 @@
                 if (id != 0 && end_ptr > text)
                 {
                     socket = GTK_SOCKET (gtk_socket_new ());
+                    gtk_container_foreach (GTK_CONTAINER (command->widget), (GtkCallback)gtk_widget_destroy, NULL);
                     gtk_container_add (GTK_CONTAINER (command->widget), GTK_WIDGET (socket));
                     gtk_socket_add_id (socket, id);
                     gtk_widget_show_all (GTK_WIDGET (command->widget));
@@ -879,6 +871,7 @@
             g_warning ("[Command/%s] Failed to run: %s", command->name, error->message);
         gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (command->menu_item), FALSE);
     }
+
     g_clear_error (&error);
 
     return command->pid;
@@ -911,8 +904,7 @@
 static void
 a11y_menuitem_toggled_cb (GtkCheckMenuItem *item, const gchar* name)
 {
-    g_key_file_set_boolean (state, "a11y-states", name, gtk_check_menu_item_get_active (item));
-    save_state_file ();
+    config_set_bool (STATE_SECTION_A11Y, name, gtk_check_menu_item_get_active (item));
 }
 
 /* Session */
@@ -942,7 +934,7 @@
     if (!session || !is_valid_session (sessions, session))
     {
         /* previous session */
-        last_session = g_key_file_get_value (state, "greeter", "last-session", NULL);
+        last_session = config_get_string (STATE_SECTION_GREETER, STATE_KEY_LAST_SESSION, NULL);
         if (last_session && g_strcmp0 (session, last_session) != 0 &&
             is_valid_session (sessions, last_session))
             session = last_session;
@@ -1410,9 +1402,8 @@
 }
 
 static void
-init_indicators (GKeyFile* config)
+init_indicators (void)
 {
-    gchar **names = NULL;
     gsize length = 0;
     guint i;
     GHashTable *builtin_items = NULL;
@@ -1421,27 +1412,14 @@
     #ifdef HAVE_LIBINDICATOR
     gboolean inited = FALSE;
     #endif
-    gboolean fallback = FALSE;
 
     const gchar *DEFAULT_LAYOUT[] = {"~host", "~spacer", "~clock", "~spacer",
                                      "~session", "~language", "~a11y", "~power", NULL};
 
-    if (g_key_file_has_key (config, "greeter", "indicators", NULL))
-    {   /* no option = default list, empty value = empty list */
-        names = g_key_file_get_string_list (config, "greeter", "indicators", &length, NULL);
-    }
-    else if (g_key_file_has_key (config, "greeter", "show-indicators", NULL))
-    {   /* fallback mode: no option = empty value = default list */
-        names = g_key_file_get_string_list (config, "greeter", "show-indicators", &length, NULL);
-        if (length == 0)
-            fallback = TRUE;
-    }
-
-    if (!names || fallback)
-    {
+    gchar **names = config_get_string_list (NULL, CONFIG_KEY_INDICATORS, NULL);
+    if (!names)
         names = (gchar**)DEFAULT_LAYOUT;
-        length = g_strv_length (names);
-    }
+    length = g_strv_length (names);
 
     builtin_items = g_hash_table_new (g_str_hash, g_str_equal);
 
@@ -1925,8 +1903,7 @@
         pending_questions = NULL;
     }
 
-    g_key_file_set_value (state, "greeter", "last-user", username);
-    save_state_file ();
+    config_set_string (STATE_SECTION_GREETER, STATE_KEY_LAST_USER, username);
 
     if (g_strcmp0 (username, "*other") == 0)
     {
@@ -2018,8 +1995,7 @@
     session = get_session ();
 
     /* Remember last choice */
-    g_key_file_set_value (state, "greeter", "last-session", session);
-    save_state_file ();
+    config_set_string (STATE_SECTION_GREETER, STATE_KEY_LAST_SESSION, session);
 
     greeter_background_save_xroot (greeter_background);
 
@@ -2436,7 +2412,6 @@
     const GList *items, *item;
     GtkTreeModel *model;
     GtkTreeIter iter;
-    gchar *last_user;
     const gchar *selected_user;
     gboolean logged_in = FALSE;
 
@@ -2474,7 +2449,7 @@
                         2, PANGO_WEIGHT_NORMAL,
                         -1);
 
-    last_user = g_key_file_get_value (state, "greeter", "last-user", NULL);
+    gchar *last_user = config_get_string (STATE_SECTION_GREETER, STATE_KEY_LAST_USER, NULL);
 
     if (lightdm_greeter_get_select_user_hint (greeter))
         selected_user = lightdm_greeter_get_select_user_hint (greeter);
@@ -2513,54 +2488,40 @@
             set_displayed_user (greeter, name);
             g_free (name);
         }
-
     }
 
     g_free (last_user);
 }
 
 static GdkFilterReturn
-focus_upon_map (GdkXEvent *gxevent, GdkEvent *event, gpointer  data)
+wm_window_filter (GdkXEvent *gxevent, GdkEvent *event, gpointer  data)
 {
-    XEvent* xevent = (XEvent*)gxevent;
-    GdkWindow* keyboard_win = a11y_keyboard_command && a11y_keyboard_command->widget ?
-                                    gtk_widget_get_window (GTK_WIDGET (a11y_keyboard_command->widget)) : NULL;
+    XEvent *xevent = (XEvent*)gxevent;
     if (xevent->type == MapNotify)
     {
-        Window xwin = xevent->xmap.window;
-        Window keyboard_xid = 0;
-        GdkDisplay* display = gdk_x11_lookup_xdisplay (xevent->xmap.display);
-        GdkWindow* win = gdk_x11_window_foreign_new_for_display (display, xwin);
+        GdkDisplay *display = gdk_x11_lookup_xdisplay (xevent->xmap.display);
+        GdkWindow *win = gdk_x11_window_foreign_new_for_display (display, xevent->xmap.window);
         GdkWindowTypeHint win_type = gdk_window_get_type_hint (win);
 
-        /* Check to see if this window is our onboard window, since we don't want to focus it. */
-        if (keyboard_win)
-            keyboard_xid = gdk_x11_window_get_xid (keyboard_win);
-
-        if (xwin != keyboard_xid
-            && win_type != GDK_WINDOW_TYPE_HINT_TOOLTIP
-            && win_type != GDK_WINDOW_TYPE_HINT_NOTIFICATION)
-        {
+        if (win_type != GDK_WINDOW_TYPE_HINT_COMBO &&
+            win_type != GDK_WINDOW_TYPE_HINT_TOOLTIP &&
+            win_type != GDK_WINDOW_TYPE_HINT_NOTIFICATION)
+        /*
+        if (win_type == GDK_WINDOW_TYPE_HINT_DESKTOP ||
+            win_type == GDK_WINDOW_TYPE_HINT_DIALOG)
+        */
             gdk_window_focus (win, GDK_CURRENT_TIME);
-            /* Make sure to keep keyboard above */
-            if (keyboard_win)
-                gdk_window_raise (keyboard_win);
-        }
     }
     else if (xevent->type == UnmapNotify)
     {
         Window xwin;
-        int revert_to;
+        int revert_to = RevertToNone;
+
         XGetInputFocus (xevent->xunmap.display, &xwin, &revert_to);
-
         if (revert_to == RevertToNone)
-        {
-            gdk_window_focus (gtk_widget_get_window (GTK_WIDGET (login_window)), GDK_CURRENT_TIME);
-            /* Make sure to keep keyboard above */
-            if (keyboard_win)
-                gdk_window_raise (keyboard_win);
-        }
+            gdk_window_lower (gtk_widget_get_window (gtk_widget_get_toplevel (GTK_WIDGET (screen_overlay))));
     }
+
     return GDK_FILTER_CONTINUE;
 }
 
@@ -2583,19 +2544,19 @@
 int
 main (int argc, char **argv)
 {
-    GKeyFile *config;
     GtkBuilder *builder;
     const GList *items, *item;
     GtkWidget *image;
-    gchar *value, **values, *state_dir;
+    gchar *value;
     GtkIconTheme *icon_theme;
     GtkCssProvider *css_provider;
     GError *error = NULL;
-    Display *display;
 
     /* Prevent memory from being swapped out, as we are dealing with passwords */
     mlockall (MCL_CURRENT | MCL_FUTURE);
 
+    g_message ("Starting %s (%s, %s)", PACKAGE_STRING, __DATE__, __TIME__);
+
     /* Disable global menus */
     g_unsetenv ("UBUNTU_MENUPROXY");
 
@@ -2613,13 +2574,9 @@
 
     g_unix_signal_add (SIGTERM, (GSourceFunc)sigterm_cb, NULL);
 
-    config = g_key_file_new ();
-    g_key_file_load_from_file (config, CONFIG_FILE, G_KEY_FILE_NONE, &error);
-    if (error && !g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_NOENT))
-        g_warning ("Failed to load configuration from %s: %s\n", CONFIG_FILE, error->message);
-    g_clear_error (&error);
+    config_init ();
 
-    if (g_key_file_get_boolean (config, "greeter", "allow-debugging", NULL))
+    if (config_get_bool (NULL, CONFIG_KEY_DEBUGGING, FALSE))
         g_log_set_default_handler (debug_log_handler, NULL);
 
     /* init gtk */
@@ -2628,7 +2585,7 @@
     /* Disabling GtkInspector shortcuts.
        It is still possible to run GtkInspector with GTK_DEBUG=interactive.
        Assume that user knows what he's doing. */
-    if (!g_key_file_get_boolean (config, "greeter", "allow-debugging", NULL))
+    if (!config_get_bool (NULL, CONFIG_KEY_DEBUGGING, FALSE))
     {
         GtkWidget *fake_window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
         GtkBindingSet *set = gtk_binding_set_by_class (G_OBJECT_GET_CLASS (fake_window));
@@ -2660,20 +2617,10 @@
     }
 
 #ifdef HAVE_LIBIDO
+    g_debug ("Initializing IDO library");
     ido_init ();
 #endif
 
-    state_dir = g_build_filename (g_get_user_cache_dir (), "lightdm-gtk-greeter", NULL);
-    g_mkdir_with_parents (state_dir, 0775);
-    state_filename = g_build_filename (state_dir, "state", NULL);
-    g_free (state_dir);
-
-    state = g_key_file_new ();
-    g_key_file_load_from_file (state, state_filename, G_KEY_FILE_NONE, &error);
-    if (error && !g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_NOENT))
-        g_warning ("Failed to load state from %s: %s\n", state_filename, error->message);
-    g_clear_error (&error);
-
     greeter = lightdm_greeter_new ();
     g_signal_connect (greeter, "show-prompt", G_CALLBACK (show_prompt_cb), NULL);
     g_signal_connect (greeter, "show-message", G_CALLBACK (show_message_cb), NULL);
@@ -2686,69 +2633,65 @@
     gdk_window_set_cursor (gdk_get_default_root_window (), gdk_cursor_new (GDK_LEFT_PTR));
 
     /* Make the greeter behave a bit more like a screensaver if used as un/lock-screen by blanking the screen */
-    gchar* end_ptr = NULL;
-    int screensaver_timeout = 60;
-    value = g_key_file_get_value (config, "greeter", "screensaver-timeout", NULL);
-    if (value)
-        screensaver_timeout = g_ascii_strtoll (value, &end_ptr, 0);
-    g_free (value);
-
-    display = gdk_x11_display_get_xdisplay (gdk_display_get_default ());
     if (lightdm_greeter_get_lock_hint (greeter))
     {
+        Display *display = gdk_x11_display_get_xdisplay (gdk_display_get_default ());
         XGetScreenSaver (display, &timeout, &interval, &prefer_blanking, &allow_exposures);
         XForceScreenSaver (display, ScreenSaverActive);
-        XSetScreenSaver (display, screensaver_timeout, 0, ScreenSaverActive, DefaultExposures);
+        XSetScreenSaver (display, config_get_int (NULL, CONFIG_KEY_SCREENSAVER_TIMEOUT, 60), 0,
+                         ScreenSaverActive, DefaultExposures);
     }
 
     /* Set GTK+ settings */
-    value = g_key_file_get_value (config, "greeter", "theme-name", NULL);
+    value = config_get_string (NULL, CONFIG_KEY_THEME, NULL);
     if (value)
     {
-        g_debug ("Using Gtk+ theme %s", value);
+        g_debug ("[Configuration] Changing GTK+ theme to '%s'", value);
         g_object_set (gtk_settings_get_default (), "gtk-theme-name", value, NULL);
+        g_free (value);
     }
-    g_free (value);
     g_object_get (gtk_settings_get_default (), "gtk-theme-name", &default_theme_name, NULL);
-    g_debug ("Default Gtk+ theme is '%s'", default_theme_name);
+    g_debug ("[Configuration] GTK+ theme: '%s'", default_theme_name);
 
-    value = g_key_file_get_value (config, "greeter", "icon-theme-name", NULL);
+    value = config_get_string (NULL, CONFIG_KEY_ICON_THEME, NULL);
     if (value)
     {
-        g_debug ("Using icon theme %s", value);
+        g_debug ("[Configuration] Changing icons theme to '%s'", value);
         g_object_set (gtk_settings_get_default (), "gtk-icon-theme-name", value, NULL);
+        g_free (value);
     }
-    g_free (value);
     g_object_get (gtk_settings_get_default (), "gtk-icon-theme-name", &default_icon_theme_name, NULL);
-    g_debug ("Default theme is '%s'", default_icon_theme_name);
+    g_debug ("[Configuration] Icons theme: '%s'", default_icon_theme_name);
 
-    value = g_key_file_get_value (config, "greeter", "font-name", NULL);
+    value = config_get_string (NULL, CONFIG_KEY_FONT, "Sans 10");
     if (value)
     {
-        g_debug ("Using font %s", value);
-        g_object_set (gtk_settings_get_default (), "gtk-font-name", value, NULL);
-    }
-    else
-    {
-        value = g_strdup ("Sans 10");
-        g_object_set (gtk_settings_get_default (), "gtk-font-name", value, NULL);
+        g_debug ("[Configuration] Changing font to '%s'", value);
+        g_object_set (gtk_settings_get_default (), "gtk-font-name", value, NULL);
+        g_free (value);
     }
     g_object_get (gtk_settings_get_default (), "gtk-font-name", &default_font_name, NULL);
-    value = g_key_file_get_value (config, "greeter", "xft-dpi", NULL);
-    if (value)
-        g_object_set (gtk_settings_get_default (), "gtk-xft-dpi", (int) (1024 * atof (value)), NULL);
-    value = g_key_file_get_value (config, "greeter", "xft-antialias", NULL);
-    if (value)
-        g_object_set (gtk_settings_get_default (), "gtk-xft-antialias", g_strcmp0 (value, "true") == 0, NULL);
-    g_free (value);
-    value = g_key_file_get_value (config, "greeter", "xft-hintstyle", NULL);
-    if (value)
+    g_debug ("[Configuration] Font: '%s'", default_font_name);
+
+    if (config_has_key (NULL, CONFIG_KEY_DPI))
+        g_object_set (gtk_settings_get_default (), "gtk-xft-dpi", 1024*config_get_int (NULL, CONFIG_KEY_DPI, 96), NULL);
+
+    if (config_has_key (NULL, CONFIG_KEY_ANTIALIAS))
+        g_object_set (gtk_settings_get_default (), "gtk-xft-antialias", config_get_bool (NULL, CONFIG_KEY_ANTIALIAS, FALSE), NULL);
+
+    value = config_get_string (NULL, CONFIG_KEY_HINT_STYLE, NULL);
+    if (value)
+    {
         g_object_set (gtk_settings_get_default (), "gtk-xft-hintstyle", value, NULL);
-    g_free (value);
-    value = g_key_file_get_value (config, "greeter", "xft-rgba", NULL);
+        g_free (value);
+    }
+
+    value = config_get_string (NULL, CONFIG_KEY_RGBA, NULL);
     if (value)
+    {
         g_object_set (gtk_settings_get_default (), "gtk-xft-rgba", value, NULL);
-    g_free (value);
+        g_free (value);
+    }
 
     #ifdef AT_SPI_COMMAND
     spawn_line_pid (AT_SPI_COMMAND, G_SPAWN_SEARCH_PATH, NULL);
@@ -2769,6 +2712,7 @@
 
     /* Screen window */
     screen_overlay = GTK_OVERLAY (gtk_builder_get_object (builder, "screen_overlay"));
+    screen_overlay_child = GTK_WIDGET (gtk_builder_get_object (builder, "screen_overlay_child"));
 
     /* Login window */
     login_window = GTK_WIDGET (gtk_builder_get_object (builder, "login_window"));
@@ -2817,7 +2761,7 @@
     gtk_accel_map_add_entry ("<Login>/a11y/reader", GDK_KEY_F4, 0);
     gtk_accel_map_add_entry ("<Login>/power/shutdown", GDK_KEY_F4, GDK_MOD1_MASK);
 
-    init_indicators (config);
+    init_indicators ();
 
     /* Hide empty panel */
     GList *menubar_items = gtk_container_get_children (GTK_CONTAINER (menubar));
@@ -2826,7 +2770,7 @@
     else
         g_list_free (menubar_items);
 
-    if (g_key_file_get_boolean (config, "greeter", "hide-user-image", NULL))
+    if (config_get_bool (NULL, CONFIG_KEY_HIDE_USER_IMAGE, FALSE))
     {
         gtk_widget_hide (GTK_WIDGET (gtk_builder_get_object (builder, "user_image_border")));
         gtk_widget_hide (GTK_WIDGET (user_image));  /* Hide to mark image is disabled */
@@ -2834,7 +2778,7 @@
     }
     else
     {
-        value = g_key_file_get_value (config, "greeter", "default-user-image", NULL);
+        value = config_get_string (NULL, CONFIG_KEY_DEFAULT_USER_IMAGE, NULL);
         if (value)
         {
             if (value[0] == '#')
@@ -2929,16 +2873,23 @@
         gtk_container_add (GTK_CONTAINER (a11y_menuitem), image);
     }
 
-    value = g_key_file_get_value (config, "greeter", "keyboard", NULL);
-    a11y_keyboard_command = menu_command_parse_extended ("keyboard", value, keyboard_menuitem, "onboard", "--xid");
-    g_free (value);
-
+    value = config_get_string (NULL, CONFIG_KEY_KEYBOARD, NULL);
+    if (value)
+    {
+        a11y_keyboard_command = menu_command_parse_extended ("keyboard", value, keyboard_menuitem, "onboard", "--xid");
+        g_free (value);
+    }
     gtk_widget_set_visible (keyboard_menuitem, a11y_keyboard_command != NULL);
 
-    value = g_key_file_get_value (config, "greeter", "reader", NULL);
-    a11y_reader_command = menu_command_parse ("reader", value, reader_menuitem);
+
+
+    value = config_get_string (NULL, CONFIG_KEY_READER, NULL);
+    if (value)
+    {
+        a11y_reader_command = menu_command_parse ("reader", value, reader_menuitem);
+        g_free (value);
+    }
     gtk_widget_set_visible (reader_menuitem, a11y_reader_command != NULL);
-    g_free (value);
 
     /* Power menu */
     if (gtk_widget_get_visible (power_menuitem))
@@ -2997,9 +2948,7 @@
     {
         gtk_menu_item_set_label (GTK_MENU_ITEM (clock_menuitem), "");
         clock_label = gtk_bin_get_child (GTK_BIN (clock_menuitem));
-        clock_format = g_key_file_get_value (config, "greeter", "clock-format", NULL);
-        if (!clock_format)
-            clock_format = "%a, %H:%M";
+        clock_format = config_get_string (NULL, CONFIG_KEY_CLOCK_FORMAT, "%a, %H:%M");
         clock_timeout_thread ();
         gdk_threads_add_timeout (1000, (GSourceFunc) clock_timeout_thread, NULL);
     }
@@ -3023,49 +2972,21 @@
     /* Background */
     greeter_background = greeter_background_new (GTK_WIDGET (screen_overlay));
 
-    value = g_key_file_get_value (config, "greeter", "active-monitor", NULL);
+    value = config_get_string (NULL, CONFIG_KEY_ACTIVE_MONITOR, NULL);
     greeter_background_set_active_monitor_config (greeter_background, value ? value : "#cursor");
     g_free (value);
 
-    const gchar *CONFIG_MONITOR_PREFIX = "monitor:";
+    read_monitor_configuration (CONFIG_GROUP_DEFAULT, GREETER_BACKGROUND_DEFAULT);
+
     gchar **config_group;
-    gchar **config_groups = g_key_file_get_groups (config, NULL);
+    gchar **config_groups = config_get_groups (CONFIG_GROUP_MONITOR);
     for (config_group = config_groups; *config_group; ++config_group)
     {
-        gchar *name_to_free = NULL;
-        const gchar *name = *config_group;
-
-        if (g_strcmp0 (*config_group, "greeter") != 0)
-        {
-            if (!g_str_has_prefix (name, CONFIG_MONITOR_PREFIX))
-                continue;
-            name = *config_group + sizeof (CONFIG_MONITOR_PREFIX);
-            while (*name && g_ascii_isspace (*name))
-                ++name;
-        }
-        else
-            name = name_to_free = g_strdup (GREETER_BACKGROUND_DEFAULT);
-
-        g_debug ("Monitor configuration found: '%s'", name);
-
-        GError *user_bg_error = NULL, *laptop_error = NULL, *duration_error = NULL;
-        gboolean user_bg = g_key_file_get_boolean (config, *config_group, "user-background", &user_bg_error);
-        gboolean laptop = g_key_file_get_boolean (config, *config_group, "laptop", &laptop_error);
-        gchar *background = g_key_file_get_value (config, *config_group, "background", NULL);
-        gchar *tr_type = g_key_file_get_string (config, *config_group, "transition-type", NULL);
-        gint tr_duration = g_key_file_get_integer (config, *config_group, "transition-duration", &duration_error);
-
-        greeter_background_set_monitor_config (greeter_background, name, background,
-                                               user_bg, user_bg_error == NULL,
-                                               laptop, laptop_error == NULL,
-                                               duration_error == NULL ? tr_duration : -1,
-                                               tr_type);
-
-        g_free (tr_type);
-        g_free (background);
-        g_free (name_to_free);
-        g_clear_error (&user_bg_error);
-        g_clear_error (&laptop_error);
+        const gchar *name = *config_group + sizeof (CONFIG_GROUP_MONITOR);
+        while (*name && g_ascii_isspace (*name))
+            ++name;
+
+        read_monitor_configuration (*config_group, name);
     }
     g_strfreev (config_groups);
 
@@ -3087,22 +3008,26 @@
     }
 
     /* Windows positions */
-    g_object_set_data_full (G_OBJECT (login_window), WINDOW_DATA_POSITION,
-                            key_file_get_position (config, "greeter", "position", &WINDOW_POS_CENTER), g_free);
-
-    value = g_key_file_get_value (config, "greeter", "panel-position", NULL);
-    if (g_strcmp0 (value, "bottom") == 0)
-        gtk_widget_set_valign (panel_window, GTK_ALIGN_END);
+    value = config_get_string (NULL, CONFIG_KEY_POSITION, NULL);
+    g_object_set_data_full (G_OBJECT (login_window), WINDOW_DATA_POSITION, str_to_position (value, &WINDOW_POS_CENTER), g_free);
     g_free (value);
 
+
+    gtk_widget_set_valign (panel_window, config_get_enum (NULL, CONFIG_KEY_PANEL_POSITION, GTK_ALIGN_START,
+                                                          "bottom", GTK_ALIGN_END,
+                                                          "top", GTK_ALIGN_START, NULL));
+
     if (a11y_keyboard_command)
-        g_object_set_data_full (G_OBJECT (a11y_keyboard_command->widget), WINDOW_DATA_POSITION,
-                                key_file_get_position (config, "greeter", "keyboard-position", &KEYBOARD_POSITION), g_free);
+    {
+        value = config_get_string (NULL, CONFIG_KEY_KEYBOARD_POSITION, NULL);
+        g_object_set_data_full (G_OBJECT (a11y_keyboard_command->widget), WINDOW_DATA_POSITION, str_to_position (value, &KEYBOARD_POSITION), g_free);
+        g_free (value);
+    }
 
     gtk_builder_connect_signals (builder, greeter);
 
-    values = g_key_file_get_string_list (config, "greeter", "a11y-states", NULL, NULL);
-    if (values && *values)
+    gchar **a11y_states = config_get_string_list (NULL, CONFIG_KEY_A11Y_STATES, NULL);
+    if (a11y_states && *a11y_states)
     {
         GHashTable *items = g_hash_table_new (g_str_hash, g_str_equal);
         g_hash_table_insert (items, "contrast", contrast_menuitem);
@@ -3112,7 +3037,7 @@
 
         gpointer item;
         gchar **values_iter;
-        for (values_iter = values; *values_iter; ++values_iter)
+        for (values_iter = a11y_states; *values_iter; ++values_iter)
         {
             value = *values_iter;
             switch (value[0])
@@ -3131,19 +3056,19 @@
                     gtk_widget_get_visible (GTK_WIDGET (item)))
                 {
                     gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (item),
-                                                    g_key_file_get_boolean (state, "a11y-states", value, NULL));
+                                                    config_get_bool (STATE_SECTION_A11Y, value, FALSE));
                     g_signal_connect (G_OBJECT (item), "toggled", G_CALLBACK (a11y_menuitem_toggled_cb), g_strdup (value));
                 }
             }
         }
         g_hash_table_unref (items);
     }
-    g_strfreev (values);
+    g_strfreev (a11y_states);
 
-    /* focus fix (source: unity-greeter) */
+    /* There is no window manager, so we need to implement some of its functionality */
     GdkWindow* root_window = gdk_get_default_root_window ();
     gdk_window_set_events (root_window, gdk_window_get_events (root_window) | GDK_SUBSTRUCTURE_MASK);
-    gdk_window_add_filter (root_window, focus_upon_map, NULL);
+    gdk_window_add_filter (root_window, wm_window_filter, NULL);
 
     gtk_widget_show (GTK_WIDGET (screen_overlay));
 

=== modified file 'src/lightdm-gtk-greeter.glade'
--- src/lightdm-gtk-greeter.glade	2014-12-10 07:59:02 +0000
+++ src/lightdm-gtk-greeter.glade	2015-03-29 05:44:39 +0000
@@ -282,6 +282,7 @@
                     <property name="name">cancel_button</property>
                     <property name="visible">True</property>
                     <property name="can_focus">True</property>
+                    <property name="receives_default">False</property>
                     <signal name="clicked" handler="power_button_clicked_cb" swapped="no"/>
                   </object>
                   <packing>
@@ -296,6 +297,7 @@
                     <property name="name">power_ok_button</property>
                     <property name="visible">True</property>
                     <property name="can_focus">True</property>
+                    <property name="receives_default">False</property>
                     <signal name="clicked" handler="power_button_clicked_cb" swapped="no"/>
                   </object>
                   <packing>
@@ -326,10 +328,9 @@
     <property name="vexpand">True</property>
     <signal name="get-child-position" handler="screen_overlay_get_child_position_cb" swapped="no"/>
     <child>
-      <object class="GtkBox" id="screen-child">
+      <object class="GtkEventBox" id="screen_overlay_child">
         <property name="visible">True</property>
         <property name="can_focus">False</property>
-        <property name="orientation">vertical</property>
         <child>
           <placeholder/>
         </child>
@@ -541,6 +542,7 @@
                     <property name="name">cancel_button</property>
                     <property name="visible">True</property>
                     <property name="can_focus">True</property>
+                    <property name="receives_default">False</property>
                     <signal name="clicked" handler="cancel_cb" swapped="no"/>
                   </object>
                   <packing>
@@ -555,6 +557,7 @@
                     <property name="name">login_button</property>
                     <property name="visible">True</property>
                     <property name="can_focus">True</property>
+                    <property name="receives_default">False</property>
                     <signal name="clicked" handler="login_cb" swapped="no"/>
                   </object>
                   <packing>