Adding upstream version 43.9.upstream/43.9upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1860 insertions, 0 deletions

diff --git a/src/shell-global.c b/src/shell-global.c
new file mode 100644
index 0000000..0ccdb10
--- /dev/null
+++ b/src/shell-global.c
@@ -0,0 +1,1860 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+#include "config.h"
+
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <math.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#ifdef HAVE_SYS_RESOURCE_H
+#include <sys/resource.h>
+#endif
+#include <locale.h>
+
+#include <X11/extensions/Xfixes.h>
+#include <gdk/gdkx.h>
+#include <gio/gio.h>
+#include <girepository.h>
+#include <meta/meta-backend.h>
+#include <meta/meta-context.h>
+#include <meta/display.h>
+#include <meta/util.h>
+#include <meta/meta-shaped-texture.h>
+#include <meta/meta-cursor-tracker.h>
+#include <meta/meta-settings.h>
+#include <meta/meta-workspace-manager.h>
+#include <meta/meta-x11-display.h>
+
+#define GNOME_DESKTOP_USE_UNSTABLE_API
+#include <libgnome-desktop/gnome-systemd.h>
+
+#if defined __OpenBSD__ || defined __FreeBSD__
+#include <sys/sysctl.h>
+#endif
+
+#include "shell-enum-types.h"
+#include "shell-global-private.h"
+#include "shell-perf-log.h"
+#include "shell-window-tracker.h"
+#include "shell-wm.h"
+#include "shell-util.h"
+#include "st.h"
+#include "switcheroo-control.h"
+
+static ShellGlobal *the_object = NULL;
+
+struct _ShellGlobal {
+  GObject parent;
+
+  ClutterStage *stage;
+
+  MetaBackend *backend;
+  MetaContext *meta_context;
+  MetaDisplay *meta_display;
+  MetaWorkspaceManager *workspace_manager;
+  Display *xdisplay;
+
+  char *session_mode;
+
+  XserverRegion input_region;
+
+  GjsContext *js_context;
+  MetaPlugin *plugin;
+  ShellWM *wm;
+  GSettings *settings;
+  const char *datadir;
+  char *imagedir;
+  char *userdatadir;
+  GFile *userdatadir_path;
+  GFile *runtime_state_path;
+
+  StFocusManager *focus_manager;
+
+  guint work_count;
+  GSList *leisure_closures;
+  guint leisure_function_id;
+
+  GHashTable *save_ops;
+
+  gboolean frame_timestamps;
+  gboolean frame_finish_timestamp;
+
+  GDBusProxy *switcheroo_control;
+  GCancellable *switcheroo_cancellable;
+};
+
+enum {
+  PROP_0,
+
+  PROP_SESSION_MODE,
+  PROP_BACKEND,
+  PROP_CONTEXT,
+  PROP_DISPLAY,
+  PROP_WORKSPACE_MANAGER,
+  PROP_SCREEN_WIDTH,
+  PROP_SCREEN_HEIGHT,
+  PROP_STAGE,
+  PROP_WINDOW_GROUP,
+  PROP_TOP_WINDOW_GROUP,
+  PROP_WINDOW_MANAGER,
+  PROP_SETTINGS,
+  PROP_DATADIR,
+  PROP_IMAGEDIR,
+  PROP_USERDATADIR,
+  PROP_FOCUS_MANAGER,
+  PROP_FRAME_TIMESTAMPS,
+  PROP_FRAME_FINISH_TIMESTAMP,
+  PROP_SWITCHEROO_CONTROL,
+
+  N_PROPS
+};
+
+static GParamSpec *props[N_PROPS] = { NULL, };
+
+/* Signals */
+enum
+{
+ NOTIFY_ERROR,
+ LOCATE_POINTER,
+ LAST_SIGNAL
+};
+
+G_DEFINE_TYPE(ShellGlobal, shell_global, G_TYPE_OBJECT);
+
+static guint shell_global_signals [LAST_SIGNAL] = { 0 };
+
+static void
+got_switcheroo_control_gpus_property_cb (GObject      *source_object,
+                                         GAsyncResult *res,
+                                         gpointer      user_data)
+{
+  ShellGlobal *global;
+  GError *error = NULL;
+  GVariant *gpus;
+
+  gpus = g_dbus_connection_call_finish (G_DBUS_CONNECTION (source_object),
+                                        res, &error);
+  if (!gpus)
+    {
+      if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
+        g_debug ("Could not get GPUs property from switcheroo-control: %s", error->message);
+      g_clear_error (&error);
+      return;
+    }
+
+  global = user_data;
+  g_dbus_proxy_set_cached_property (global->switcheroo_control, "GPUs", gpus);
+  g_object_notify_by_pspec (G_OBJECT (global), props[PROP_SWITCHEROO_CONTROL]);
+}
+
+static void
+switcheroo_control_ready_cb (GObject      *source_object,
+                             GAsyncResult *res,
+                             gpointer      user_data)
+{
+  ShellGlobal *global;
+  GError *error = NULL;
+  ShellNetHadessSwitcherooControl *control;
+  g_auto(GStrv) cached_props = NULL;
+
+  control = shell_net_hadess_switcheroo_control_proxy_new_for_bus_finish (res, &error);
+  if (!control)
+    {
+      if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
+        g_debug ("Could not get switcheroo-control GDBusProxy: %s", error->message);
+      g_clear_error (&error);
+      return;
+    }
+
+  global = user_data;
+  global->switcheroo_control = G_DBUS_PROXY (control);
+  g_debug ("Got switcheroo-control proxy successfully");
+
+  cached_props = g_dbus_proxy_get_cached_property_names (global->switcheroo_control);
+  if (cached_props != NULL && g_strv_contains ((const gchar * const *) cached_props, "GPUs"))
+    {
+      g_object_notify_by_pspec (G_OBJECT (global), props[PROP_SWITCHEROO_CONTROL]);
+      return;
+    }
+  /* Delay property notification until we have all the properties gathered */
+
+  g_dbus_connection_call (g_dbus_proxy_get_connection (global->switcheroo_control),
+                          g_dbus_proxy_get_name (global->switcheroo_control),
+                          g_dbus_proxy_get_object_path (global->switcheroo_control),
+                          "org.freedesktop.DBus.Properties",
+                          "Get",
+                          g_variant_new ("(ss)",
+                                         g_dbus_proxy_get_interface_name (global->switcheroo_control),
+                                         "GPUs"),
+                          NULL,
+                          G_DBUS_CALL_FLAGS_NONE,
+                          -1,
+                          global->switcheroo_cancellable,
+                          got_switcheroo_control_gpus_property_cb,
+                          user_data);
+}
+
+static void
+shell_global_set_property(GObject         *object,
+                          guint            prop_id,
+                          const GValue    *value,
+                          GParamSpec      *pspec)
+{
+  ShellGlobal *global = SHELL_GLOBAL (object);
+
+  switch (prop_id)
+    {
+    case PROP_SESSION_MODE:
+      g_clear_pointer (&global->session_mode, g_free);
+      global->session_mode = g_ascii_strdown (g_value_get_string (value), -1);
+      break;
+    case PROP_FRAME_TIMESTAMPS:
+      {
+        gboolean enable = g_value_get_boolean (value);
+
+        if (global->frame_timestamps != enable)
+          {
+            global->frame_timestamps = enable;
+            g_object_notify_by_pspec (object, props[PROP_FRAME_TIMESTAMPS]);
+          }
+      }
+      break;
+    case PROP_FRAME_FINISH_TIMESTAMP:
+      {
+        gboolean enable = g_value_get_boolean (value);
+
+        if (global->frame_finish_timestamp != enable)
+          {
+            global->frame_finish_timestamp = enable;
+            g_object_notify_by_pspec (object, props[PROP_FRAME_FINISH_TIMESTAMP]);
+          }
+      }
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+static void
+shell_global_get_property(GObject         *object,
+                          guint            prop_id,
+                          GValue          *value,
+                          GParamSpec      *pspec)
+{
+  ShellGlobal *global = SHELL_GLOBAL (object);
+
+  switch (prop_id)
+    {
+    case PROP_SESSION_MODE:
+      g_value_set_string (value, shell_global_get_session_mode (global));
+      break;
+    case PROP_BACKEND:
+      g_value_set_object (value, global->backend);
+      break;
+    case PROP_CONTEXT:
+      g_value_set_object (value, global->meta_context);
+      break;
+    case PROP_DISPLAY:
+      g_value_set_object (value, global->meta_display);
+      break;
+    case PROP_WORKSPACE_MANAGER:
+      g_value_set_object (value, global->workspace_manager);
+      break;
+    case PROP_SCREEN_WIDTH:
+      {
+        int width, height;
+
+        meta_display_get_size (global->meta_display, &width, &height);
+        g_value_set_int (value, width);
+      }
+      break;
+    case PROP_SCREEN_HEIGHT:
+      {
+        int width, height;
+
+        meta_display_get_size (global->meta_display, &width, &height);
+        g_value_set_int (value, height);
+      }
+      break;
+    case PROP_STAGE:
+      g_value_set_object (value, global->stage);
+      break;
+    case PROP_WINDOW_GROUP:
+      g_value_set_object (value, meta_get_window_group_for_display (global->meta_display));
+      break;
+    case PROP_TOP_WINDOW_GROUP:
+      g_value_set_object (value, meta_get_top_window_group_for_display (global->meta_display));
+      break;
+    case PROP_WINDOW_MANAGER:
+      g_value_set_object (value, global->wm);
+      break;
+    case PROP_SETTINGS:
+      g_value_set_object (value, global->settings);
+      break;
+    case PROP_DATADIR:
+      g_value_set_string (value, global->datadir);
+      break;
+    case PROP_IMAGEDIR:
+      g_value_set_string (value, global->imagedir);
+      break;
+    case PROP_USERDATADIR:
+      g_value_set_string (value, global->userdatadir);
+      break;
+    case PROP_FOCUS_MANAGER:
+      g_value_set_object (value, global->focus_manager);
+      break;
+    case PROP_FRAME_TIMESTAMPS:
+      g_value_set_boolean (value, global->frame_timestamps);
+      break;
+    case PROP_FRAME_FINISH_TIMESTAMP:
+      g_value_set_boolean (value, global->frame_finish_timestamp);
+      break;
+    case PROP_SWITCHEROO_CONTROL:
+      g_value_set_object (value, global->switcheroo_control);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+static void
+switcheroo_appeared_cb (GDBusConnection *connection,
+                        const char     *name,
+                        const char     *name_owner,
+                        gpointer        user_data)
+{
+  ShellGlobal *global = user_data;
+
+  g_debug ("switcheroo-control appeared");
+  shell_net_hadess_switcheroo_control_proxy_new_for_bus (G_BUS_TYPE_SYSTEM,
+                                                         G_DBUS_PROXY_FLAGS_NONE,
+                                                         "net.hadess.SwitcherooControl",
+                                                         "/net/hadess/SwitcherooControl",
+                                                         global->switcheroo_cancellable,
+                                                         switcheroo_control_ready_cb,
+                                                         global);
+}
+
+static void
+switcheroo_vanished_cb (GDBusConnection *connection,
+                        const char      *name,
+                        gpointer         user_data)
+{
+  ShellGlobal *global = user_data;
+
+  g_debug ("switcheroo-control vanished");
+  g_clear_object (&global->switcheroo_control);
+  g_object_notify_by_pspec (G_OBJECT (global), props[PROP_SWITCHEROO_CONTROL]);
+}
+
+static void
+shell_global_init (ShellGlobal *global)
+{
+  const char *datadir = g_getenv ("GNOME_SHELL_DATADIR");
+  const char *shell_js = g_getenv("GNOME_SHELL_JS");
+  char *imagedir, **search_path;
+  char *path;
+  const char *byteorder_string;
+
+  if (!datadir)
+    datadir = GNOME_SHELL_DATADIR;
+  global->datadir = datadir;
+
+  /* We make sure imagedir ends with a '/', since the JS won't have
+   * access to g_build_filename() and so will end up just
+   * concatenating global.imagedir to a filename.
+   */
+  imagedir = g_build_filename (datadir, "images/", NULL);
+  if (g_file_test (imagedir, G_FILE_TEST_IS_DIR))
+    global->imagedir = imagedir;
+  else
+    {
+      g_free (imagedir);
+      global->imagedir = g_strdup_printf ("%s/", datadir);
+    }
+
+  /* Ensure config dir exists for later use */
+  global->userdatadir = g_build_filename (g_get_user_data_dir (), "gnome-shell", NULL);
+  g_mkdir_with_parents (global->userdatadir, 0700);
+  global->userdatadir_path = g_file_new_for_path (global->userdatadir);
+
+#if G_BYTE_ORDER == G_LITTLE_ENDIAN
+  byteorder_string = "LE";
+#else
+  byteorder_string = "BE";
+#endif
+
+  /* And the runtime state */
+  path = g_strdup_printf ("%s/gnome-shell/runtime-state-%s.%s",
+                          g_get_user_runtime_dir (),
+                          byteorder_string,
+                          XDisplayName (NULL));
+  (void) g_mkdir_with_parents (path, 0700);
+  global->runtime_state_path = g_file_new_for_path (path);
+  g_free (path);
+
+  global->settings = g_settings_new ("org.gnome.shell");
+
+  if (shell_js)
+    {
+      int i, j;
+      search_path = g_strsplit (shell_js, ":", -1);
+
+      /* The naive g_strsplit above will split 'resource:///foo/bar' into 'resource',
+       * '///foo/bar'. Combine these back together by looking for a literal 'resource'
+       * in the array. */
+      for (i = 0, j = 0; search_path[i];)
+        {
+          char *out;
+
+          if (strcmp (search_path[i], "resource") == 0 && search_path[i + 1] != NULL)
+            {
+              out = g_strconcat (search_path[i], ":", search_path[i + 1], NULL);
+              g_free (search_path[i]);
+              g_free (search_path[i + 1]);
+              i += 2;
+            }
+          else
+            {
+              out = search_path[i];
+              i += 1;
+            }
+
+          search_path[j++] = out;
+        }
+
+      search_path[j] = NULL; /* NULL-terminate the now possibly shorter array */
+    }
+  else
+    {
+      search_path = g_malloc0 (2 * sizeof (char *));
+      search_path[0] = g_strdup ("resource:///org/gnome/shell");
+    }
+
+  global->js_context = g_object_new (GJS_TYPE_CONTEXT,
+                                     "search-path", search_path,
+                                     NULL);
+
+  g_strfreev (search_path);
+
+  global->save_ops = g_hash_table_new_full (g_file_hash,
+                                            (GEqualFunc) g_file_equal,
+                                            g_object_unref, g_object_unref);
+
+  global->switcheroo_cancellable = g_cancellable_new ();
+  g_bus_watch_name (G_BUS_TYPE_SYSTEM,
+                    "net.hadess.SwitcherooControl",
+                    G_BUS_NAME_WATCHER_FLAGS_NONE,
+                    switcheroo_appeared_cb,
+                    switcheroo_vanished_cb,
+                    global,
+                    NULL);
+}
+
+static void
+shell_global_finalize (GObject *object)
+{
+  ShellGlobal *global = SHELL_GLOBAL (object);
+
+  g_clear_object (&global->js_context);
+  g_object_unref (global->settings);
+
+  the_object = NULL;
+
+  g_cancellable_cancel (global->switcheroo_cancellable);
+  g_clear_object (&global->switcheroo_cancellable);
+
+  g_clear_object (&global->userdatadir_path);
+  g_clear_object (&global->runtime_state_path);
+
+  g_free (global->session_mode);
+  g_free (global->imagedir);
+  g_free (global->userdatadir);
+
+  g_hash_table_unref (global->save_ops);
+
+  G_OBJECT_CLASS(shell_global_parent_class)->finalize (object);
+}
+
+static void
+shell_global_class_init (ShellGlobalClass *klass)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+
+  gobject_class->get_property = shell_global_get_property;
+  gobject_class->set_property = shell_global_set_property;
+  gobject_class->finalize = shell_global_finalize;
+
+  shell_global_signals[NOTIFY_ERROR] =
+      g_signal_new ("notify-error",
+                    G_TYPE_FROM_CLASS (klass),
+                    G_SIGNAL_RUN_LAST,
+                    0,
+                    NULL, NULL, NULL,
+                    G_TYPE_NONE, 2,
+                    G_TYPE_STRING,
+                    G_TYPE_STRING);
+  shell_global_signals[LOCATE_POINTER] =
+      g_signal_new ("locate-pointer",
+                    G_TYPE_FROM_CLASS (klass),
+                    G_SIGNAL_RUN_LAST,
+                    0,
+                    NULL, NULL, NULL,
+                    G_TYPE_NONE, 0);
+
+  props[PROP_SESSION_MODE] =
+    g_param_spec_string ("session-mode",
+                         "Session Mode",
+                         "The session mode to use",
+                         "user",
+                         G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS);
+
+  props[PROP_SCREEN_WIDTH] =
+    g_param_spec_int ("screen-width",
+                      "Screen Width",
+                      "Screen width, in pixels",
+                      0, G_MAXINT, 1,
+                      G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  props[PROP_SCREEN_HEIGHT] =
+    g_param_spec_int ("screen-height",
+                      "Screen Height",
+                      "Screen height, in pixels",
+                      0, G_MAXINT, 1,
+                      G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  props[PROP_BACKEND] =
+    g_param_spec_object ("backend",
+                         "Backend",
+                         "MetaBackend object",
+                         META_TYPE_BACKEND,
+                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  props[PROP_CONTEXT] =
+    g_param_spec_object ("context",
+                         "Context",
+                         "MetaContext object",
+                         META_TYPE_CONTEXT,
+                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  props[PROP_DISPLAY] =
+    g_param_spec_object ("display",
+                         "Display",
+                         "Metacity display object for the shell",
+                         META_TYPE_DISPLAY,
+                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  props[PROP_WORKSPACE_MANAGER] =
+    g_param_spec_object ("workspace-manager",
+                         "Workspace manager",
+                         "Workspace manager",
+                         META_TYPE_WORKSPACE_MANAGER,
+                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  props[PROP_STAGE] =
+    g_param_spec_object ("stage",
+                         "Stage",
+                         "Stage holding the desktop scene graph",
+                         CLUTTER_TYPE_ACTOR,
+                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  props[PROP_WINDOW_GROUP] =
+    g_param_spec_object ("window-group",
+                         "Window Group",
+                         "Actor holding window actors",
+                         CLUTTER_TYPE_ACTOR,
+                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  props[PROP_TOP_WINDOW_GROUP] =
+    g_param_spec_object ("top-window-group",
+                         "Top Window Group",
+                         "Actor holding override-redirect windows",
+                         CLUTTER_TYPE_ACTOR,
+                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  props[PROP_WINDOW_MANAGER] =
+    g_param_spec_object ("window-manager",
+                         "Window Manager",
+                         "Window management interface",
+                         SHELL_TYPE_WM,
+                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  props[PROP_SETTINGS] =
+    g_param_spec_object ("settings",
+                         "Settings",
+                         "GSettings instance for gnome-shell configuration",
+                         G_TYPE_SETTINGS,
+                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  props[PROP_DATADIR] =
+    g_param_spec_string ("datadir",
+                         "Data directory",
+                         "Directory containing gnome-shell data files",
+                         NULL,
+                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  props[PROP_IMAGEDIR] =
+    g_param_spec_string ("imagedir",
+                         "Image directory",
+                         "Directory containing gnome-shell image files",
+                         NULL,
+                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  props[PROP_USERDATADIR] =
+    g_param_spec_string ("userdatadir",
+                         "User data directory",
+                         "Directory containing gnome-shell user data",
+                         NULL,
+                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  props[PROP_FOCUS_MANAGER] =
+    g_param_spec_object ("focus-manager",
+                         "Focus manager",
+                         "The shell's StFocusManager",
+                         ST_TYPE_FOCUS_MANAGER,
+                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  props[PROP_FRAME_TIMESTAMPS] =
+    g_param_spec_boolean ("frame-timestamps",
+                          "Frame Timestamps",
+                          "Whether to log frame timestamps in the performance log",
+                          FALSE,
+                          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_EXPLICIT_NOTIFY);
+
+  props[PROP_FRAME_FINISH_TIMESTAMP] =
+    g_param_spec_boolean ("frame-finish-timestamp",
+                          "Frame Finish Timestamps",
+                          "Whether at the end of a frame to call glFinish and log paintCompletedTimestamp",
+                          FALSE,
+                          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_EXPLICIT_NOTIFY);
+
+  props[PROP_SWITCHEROO_CONTROL] =
+    g_param_spec_object ("switcheroo-control",
+                         "switcheroo-control",
+                         "D-Bus Proxy for switcheroo-control daemon",
+                         G_TYPE_DBUS_PROXY,
+                         G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
+
+  g_object_class_install_properties (gobject_class, N_PROPS, props);
+}
+
+/*
+ * _shell_global_init: (skip)
+ * @first_property_name: the name of the first property
+ * @...: the value of the first property, followed optionally by more
+ *  name/value pairs, followed by %NULL
+ *
+ * Initializes the shell global singleton with the construction-time
+ * properties.
+ *
+ * There are currently no such properties, so @first_property_name should
+ * always be %NULL.
+ *
+ * This call must be called before shell_global_get() and shouldn't be called
+ * more than once.
+ */
+void
+_shell_global_init (const char *first_property_name,
+                    ...)
+{
+  va_list argument_list;
+
+  g_return_if_fail (the_object == NULL);
+
+  va_start (argument_list, first_property_name);
+  the_object = SHELL_GLOBAL (g_object_new_valist (SHELL_TYPE_GLOBAL,
+                                                  first_property_name,
+                                                  argument_list));
+  va_end (argument_list);
+
+}
+
+/**
+ * shell_global_get:
+ *
+ * Gets the singleton global object that represents the desktop.
+ *
+ * Return value: (transfer none): the singleton global object
+ */
+ShellGlobal *
+shell_global_get (void)
+{
+  return the_object;
+}
+
+/**
+ * _shell_global_destroy_gjs_context: (skip)
+ * @self: global object
+ *
+ * Destroys the GjsContext held by ShellGlobal, in order to break reference
+ * counting cycles. (The GjsContext holds a reference to ShellGlobal because
+ * it's available as window.global inside JS.)
+ */
+void
+_shell_global_destroy_gjs_context (ShellGlobal *self)
+{
+  g_clear_object (&self->js_context);
+}
+
+static guint32
+get_current_time_maybe_roundtrip (ShellGlobal *global)
+{
+  guint32 time;
+
+  time = shell_global_get_current_time (global);
+  if (time != CurrentTime)
+    return time;
+
+  return meta_display_get_current_time_roundtrip (global->meta_display);
+}
+
+static void
+focus_window_changed (MetaDisplay *display,
+                      GParamSpec  *param,
+                      gpointer     user_data)
+{
+  ShellGlobal *global = user_data;
+
+  /* If the stage window became unfocused, drop the key focus
+   * on Clutter's side. */
+  if (!meta_stage_is_focused (global->meta_display))
+    clutter_stage_set_key_focus (global->stage, NULL);
+}
+
+static ClutterActor *
+get_key_focused_actor (ShellGlobal *global)
+{
+  ClutterActor *actor;
+
+  actor = clutter_stage_get_key_focus (global->stage);
+
+  /* If there's no explicit key focus, clutter_stage_get_key_focus()
+   * returns the stage. This is a terrible API. */
+  if (actor == CLUTTER_ACTOR (global->stage))
+    actor = NULL;
+
+  return actor;
+}
+
+static void
+sync_stage_window_focus (ShellGlobal *global)
+{
+  ClutterActor *actor;
+
+  actor = get_key_focused_actor (global);
+
+  /* An actor got key focus and the stage needs to be focused. */
+  if (actor != NULL && !meta_stage_is_focused (global->meta_display))
+    meta_focus_stage_window (global->meta_display,
+                             get_current_time_maybe_roundtrip (global));
+
+  /* An actor dropped key focus. Focus the default window. */
+  else if (actor == NULL && meta_stage_is_focused (global->meta_display))
+    meta_display_focus_default_window (global->meta_display,
+                                       get_current_time_maybe_roundtrip (global));
+}
+
+static void
+focus_actor_changed (ClutterStage *stage,
+                     GParamSpec   *param,
+                     gpointer      user_data)
+{
+  ShellGlobal *global = user_data;
+  sync_stage_window_focus (global);
+}
+
+static void
+sync_input_region (ShellGlobal *global)
+{
+  MetaDisplay *display = global->meta_display;
+  MetaX11Display *x11_display = meta_display_get_x11_display (display);
+
+  meta_x11_display_set_stage_input_region (x11_display, global->input_region);
+}
+
+/**
+ * shell_global_set_stage_input_region:
+ * @global: the #ShellGlobal
+ * @rectangles: (element-type Meta.Rectangle): a list of #MetaRectangle
+ * describing the input region.
+ *
+ * Sets the area of the stage that is responsive to mouse clicks when
+ * we don't have a modal or grab.
+ */
+void
+shell_global_set_stage_input_region (ShellGlobal *global,
+                                     GSList      *rectangles)
+{
+  MetaRectangle *rect;
+  XRectangle *rects;
+  int nrects, i;
+  GSList *r;
+
+  g_return_if_fail (SHELL_IS_GLOBAL (global));
+
+  if (meta_is_wayland_compositor ())
+    return;
+
+  nrects = g_slist_length (rectangles);
+  rects = g_new (XRectangle, nrects);
+  for (r = rectangles, i = 0; r; r = r->next, i++)
+    {
+      rect = (MetaRectangle *)r->data;
+      rects[i].x = rect->x;
+      rects[i].y = rect->y;
+      rects[i].width = rect->width;
+      rects[i].height = rect->height;
+    }
+
+  if (global->input_region)
+    XFixesDestroyRegion (global->xdisplay, global->input_region);
+
+  global->input_region = XFixesCreateRegion (global->xdisplay, rects, nrects);
+  g_free (rects);
+
+  sync_input_region (global);
+}
+
+/**
+ * shell_global_get_stage:
+ *
+ * Return value: (transfer none): The default #ClutterStage
+ */
+ClutterStage *
+shell_global_get_stage (ShellGlobal  *global)
+{
+  return global->stage;
+}
+
+/**
+ * shell_global_get_display:
+ *
+ * Return value: (transfer none): The default #MetaDisplay
+ */
+MetaDisplay *
+shell_global_get_display (ShellGlobal  *global)
+{
+  return global->meta_display;
+}
+
+/**
+ * shell_global_get_workspace_manager:
+ *
+ * Return value: (transfer none): The default #MetaWorkspaceManager
+ */
+MetaWorkspaceManager *
+shell_global_get_workspace_manager (ShellGlobal  *global)
+{
+  return global->workspace_manager;
+}
+
+/**
+ * shell_global_get_window_actors:
+ *
+ * Gets the list of #MetaWindowActor for the plugin's screen
+ *
+ * Return value: (element-type Meta.WindowActor) (transfer container): the list of windows
+ */
+GList *
+shell_global_get_window_actors (ShellGlobal *global)
+{
+  GList *filtered = NULL;
+  GList *l;
+
+  g_return_val_if_fail (SHELL_IS_GLOBAL (global), NULL);
+
+  for (l = meta_get_window_actors (global->meta_display); l; l = l->next)
+    if (!meta_window_actor_is_destroyed (l->data))
+      filtered = g_list_prepend (filtered, l->data);
+
+  return g_list_reverse (filtered);
+}
+
+static void
+global_stage_notify_width (GObject    *gobject,
+                           GParamSpec *pspec,
+                           gpointer    data)
+{
+  ShellGlobal *global = SHELL_GLOBAL (data);
+
+  g_object_notify_by_pspec (G_OBJECT (global), props[PROP_SCREEN_WIDTH]);
+}
+
+static void
+global_stage_notify_height (GObject    *gobject,
+                            GParamSpec *pspec,
+                            gpointer    data)
+{
+  ShellGlobal *global = SHELL_GLOBAL (data);
+
+  g_object_notify_by_pspec (G_OBJECT (global), props[PROP_SCREEN_HEIGHT]);
+}
+
+static gboolean
+global_stage_before_paint (gpointer data)
+{
+  ShellGlobal *global = SHELL_GLOBAL (data);
+
+  if (global->frame_timestamps)
+    shell_perf_log_event (shell_perf_log_get_default (),
+                          "clutter.stagePaintStart");
+
+  return TRUE;
+}
+
+static gboolean
+load_gl_symbol (const char  *name,
+                void       **func)
+{
+  *func = cogl_get_proc_address (name);
+  if (!*func)
+    {
+      g_warning ("failed to resolve required GL symbol \"%s\"\n", name);
+      return FALSE;
+    }
+  return TRUE;
+}
+
+static void
+global_stage_after_paint (ClutterStage     *stage,
+                          ClutterStageView *stage_view,
+                          ShellGlobal      *global)
+{
+  /* At this point, we've finished all layout and painting, but haven't
+   * actually flushed or swapped */
+
+  if (global->frame_timestamps && global->frame_finish_timestamp)
+    {
+      /* It's interesting to find out when the paint actually finishes
+       * on the GPU. We could wait for this asynchronously with
+       * ARB_timer_query (see https://bugzilla.gnome.org/show_bug.cgi?id=732350
+       * for an implementation of this), but what we actually would
+       * find out then is the latency for drawing a frame, not how much
+       * GPU work was needed, since frames can overlap. Calling glFinish()
+       * is a fairly reliable way to separate out adjacent frames
+       * and measure the amount of GPU work. This is turned on with a
+       * separate property from ::frame-timestamps, since it should not
+       * be turned on if we're trying to actual measure latency or frame
+       * rate.
+       */
+      static void (*finish) (void);
+
+      if (!finish)
+        load_gl_symbol ("glFinish", (void **)&finish);
+
+      cogl_flush ();
+      finish ();
+
+      shell_perf_log_event (shell_perf_log_get_default (),
+                            "clutter.paintCompletedTimestamp");
+    }
+}
+
+static gboolean
+global_stage_after_swap (gpointer data)
+{
+  /* Everything is done, we're ready for a new frame */
+
+  ShellGlobal *global = SHELL_GLOBAL (data);
+
+  if (global->frame_timestamps)
+    shell_perf_log_event (shell_perf_log_get_default (),
+                          "clutter.stagePaintDone");
+
+  return TRUE;
+}
+
+static void
+update_scaling_factor (ShellGlobal  *global,
+                       MetaSettings *settings)
+{
+  ClutterStage *stage = CLUTTER_STAGE (global->stage);
+  StThemeContext *context = st_theme_context_get_for_stage (stage);
+  int scaling_factor;
+
+  scaling_factor = meta_settings_get_ui_scaling_factor (settings);
+  g_object_set (context, "scale-factor", scaling_factor, NULL);
+}
+
+static void
+ui_scaling_factor_changed (MetaSettings *settings,
+                           ShellGlobal  *global)
+{
+  update_scaling_factor (global, settings);
+}
+
+static void
+entry_cursor_func (StEntry  *entry,
+                   gboolean  use_ibeam,
+                   gpointer  user_data)
+{
+  ShellGlobal *global = user_data;
+
+  meta_display_set_cursor (global->meta_display,
+                           use_ibeam ? META_CURSOR_IBEAM : META_CURSOR_DEFAULT);
+}
+
+static void
+on_x11_display_closed (MetaDisplay *display,
+                       ShellGlobal *global)
+{
+  g_signal_handlers_disconnect_by_data (global->stage, global);
+}
+
+void
+_shell_global_set_plugin (ShellGlobal *global,
+                          MetaPlugin  *plugin)
+{
+  MetaDisplay *display;
+  MetaBackend *backend;
+  MetaSettings *settings;
+
+  g_return_if_fail (SHELL_IS_GLOBAL (global));
+  g_return_if_fail (global->plugin == NULL);
+
+  global->backend = meta_get_backend ();
+  global->plugin = plugin;
+  global->wm = shell_wm_new (plugin);
+
+  display = meta_plugin_get_display (plugin);
+  global->meta_display = display;
+  global->meta_context = meta_display_get_context (display);
+  global->workspace_manager = meta_display_get_workspace_manager (display);
+
+  global->stage = CLUTTER_STAGE (meta_get_stage_for_display (display));
+
+  if (!meta_is_wayland_compositor ())
+    {
+      MetaX11Display *x11_display = meta_display_get_x11_display (display);
+      global->xdisplay = meta_x11_display_get_xdisplay (x11_display);
+    }
+
+  st_entry_set_cursor_func (entry_cursor_func, global);
+  st_clipboard_set_selection (meta_display_get_selection (display));
+
+  g_signal_connect (global->stage, "notify::width",
+                    G_CALLBACK (global_stage_notify_width), global);
+  g_signal_connect (global->stage, "notify::height",
+                    G_CALLBACK (global_stage_notify_height), global);
+
+  clutter_threads_add_repaint_func_full (CLUTTER_REPAINT_FLAGS_PRE_PAINT,
+                                         global_stage_before_paint,
+                                         global, NULL);
+
+  g_signal_connect (global->stage, "after-paint",
+                    G_CALLBACK (global_stage_after_paint), global);
+
+  clutter_threads_add_repaint_func_full (CLUTTER_REPAINT_FLAGS_POST_PAINT,
+                                         global_stage_after_swap,
+                                         global, NULL);
+
+  shell_perf_log_define_event (shell_perf_log_get_default(),
+                               "clutter.stagePaintStart",
+                               "Start of stage page repaint",
+                               "");
+  shell_perf_log_define_event (shell_perf_log_get_default(),
+                               "clutter.paintCompletedTimestamp",
+                               "Paint completion on GPU",
+                               "");
+  shell_perf_log_define_event (shell_perf_log_get_default(),
+                               "clutter.stagePaintDone",
+                               "End of frame, possibly including swap time",
+                               "");
+
+  g_signal_connect (global->stage, "notify::key-focus",
+                    G_CALLBACK (focus_actor_changed), global);
+  g_signal_connect (global->meta_display, "notify::focus-window",
+                    G_CALLBACK (focus_window_changed), global);
+
+  if (global->xdisplay)
+    g_signal_connect_object (global->meta_display, "x11-display-closing",
+                             G_CALLBACK (on_x11_display_closed), global, 0);
+
+  backend = meta_get_backend ();
+  settings = meta_backend_get_settings (backend);
+  g_signal_connect (settings, "ui-scaling-factor-changed",
+                    G_CALLBACK (ui_scaling_factor_changed), global);
+
+  global->focus_manager = st_focus_manager_get_for_stage (global->stage);
+
+  update_scaling_factor (global, settings);
+}
+
+GjsContext *
+_shell_global_get_gjs_context (ShellGlobal *global)
+{
+  return global->js_context;
+}
+
+/* Code to close all file descriptors before we exec; copied from gspawn.c in GLib.
+ *
+ * Authors: Padraig O'Briain, Matthias Clasen, Lennart Poettering
+ *
+ * http://bugzilla.gnome.org/show_bug.cgi?id=469231
+ * http://bugzilla.gnome.org/show_bug.cgi?id=357585
+ */
+
+static int
+set_cloexec (void *data, gint fd)
+{
+  if (fd >= GPOINTER_TO_INT (data))
+    fcntl (fd, F_SETFD, FD_CLOEXEC);
+
+  return 0;
+}
+
+#ifndef HAVE_FDWALK
+static int
+fdwalk (int (*cb)(void *data, int fd), void *data)
+{
+  gint open_max;
+  gint fd;
+  gint res = 0;
+
+#ifdef HAVE_SYS_RESOURCE_H
+  struct rlimit rl;
+#endif
+
+#ifdef __linux__
+  DIR *d;
+
+  if ((d = opendir("/proc/self/fd"))) {
+      struct dirent *de;
+
+      while ((de = readdir(d))) {
+          glong l;
+          gchar *e = NULL;
+
+          if (de->d_name[0] == '.')
+              continue;
+
+          errno = 0;
+          l = strtol(de->d_name, &e, 10);
+          if (errno != 0 || !e || *e)
+              continue;
+
+          fd = (gint) l;
+
+          if ((glong) fd != l)
+              continue;
+
+          if (fd == dirfd(d))
+              continue;
+
+          if ((res = cb (data, fd)) != 0)
+              break;
+        }
+
+      closedir(d);
+      return res;
+  }
+
+  /* If /proc is not mounted or not accessible we fall back to the old
+   * rlimit trick */
+
+#endif
+
+#ifdef HAVE_SYS_RESOURCE_H
+  if (getrlimit(RLIMIT_NOFILE, &rl) == 0 && rl.rlim_max != RLIM_INFINITY)
+      open_max = rl.rlim_max;
+  else
+#endif
+      open_max = sysconf (_SC_OPEN_MAX);
+
+  for (fd = 0; fd < open_max; fd++)
+      if ((res = cb (data, fd)) != 0)
+          break;
+
+  return res;
+}
+#endif
+
+static void
+pre_exec_close_fds(void)
+{
+  fdwalk (set_cloexec, GINT_TO_POINTER(3));
+}
+
+/**
+ * shell_global_reexec_self:
+ * @global: A #ShellGlobal
+ * 
+ * Restart the current process.  Only intended for development purposes. 
+ */
+void 
+shell_global_reexec_self (ShellGlobal *global)
+{
+  GPtrArray *arr;
+  gsize len;
+  MetaContext *meta_context;
+
+#if defined __linux__ || defined __sun
+  char *buf;
+  char *buf_p;
+  char *buf_end;
+  g_autoptr (GError) error = NULL;
+
+  if (!g_file_get_contents ("/proc/self/cmdline", &buf, &len, &error))
+    {
+      g_warning ("failed to get /proc/self/cmdline: %s", error->message);
+      return;
+    }
+
+  buf_end = buf+len;
+  arr = g_ptr_array_new ();
+  /* The cmdline file is NUL-separated */
+  for (buf_p = buf; buf_p < buf_end; buf_p = buf_p + strlen (buf_p) + 1)
+    g_ptr_array_add (arr, buf_p);
+
+  g_ptr_array_add (arr, NULL);
+#elif defined __OpenBSD__
+  gchar **args, **args_p;
+  gint mib[] = { CTL_KERN, KERN_PROC_ARGS, getpid(), KERN_PROC_ARGV };
+
+  if (sysctl (mib, G_N_ELEMENTS (mib), NULL, &len, NULL, 0) == -1)
+    return;
+
+  args = g_malloc0 (len);
+
+  if (sysctl (mib, G_N_ELEMENTS (mib), args, &len, NULL, 0) == -1) {
+    g_warning ("failed to get command line args: %d", errno);
+    g_free (args);
+    return;
+  }
+
+  arr = g_ptr_array_new ();
+  for (args_p = args; *args_p != NULL; args_p++) {
+    g_ptr_array_add (arr, *args_p);
+  }
+
+  g_ptr_array_add (arr, NULL);
+#elif defined __FreeBSD__
+  char *buf;
+  char *buf_p;
+  char *buf_end;
+  gint mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_ARGS, getpid() };
+
+  if (sysctl (mib, G_N_ELEMENTS (mib), NULL, &len, NULL, 0) == -1)
+    return;
+
+  buf = g_malloc0 (len);
+
+  if (sysctl (mib, G_N_ELEMENTS (mib), buf, &len, NULL, 0) == -1) {
+    g_warning ("failed to get command line args: %d", errno);
+    g_free (buf);
+    return;
+  }
+
+  buf_end = buf+len;
+  arr = g_ptr_array_new ();
+  /* The value returned by sysctl is NUL-separated */
+  for (buf_p = buf; buf_p < buf_end; buf_p = buf_p + strlen (buf_p) + 1)
+    g_ptr_array_add (arr, buf_p);
+
+  g_ptr_array_add (arr, NULL);
+#else
+  return;
+#endif
+
+  /* Close all file descriptors other than stdin/stdout/stderr, otherwise
+   * they will leak and stay open after the exec. In particular, this is
+   * important for file descriptors that represent mapped graphics buffer
+   * objects.
+   */
+  pre_exec_close_fds ();
+
+  g_object_get (global, "context", &meta_context, NULL);
+  meta_context_restore_rlimit_nofile (meta_context, NULL);
+
+  meta_display_close (shell_global_get_display (global),
+                      shell_global_get_current_time (global));
+
+  execvp (arr->pdata[0], (char**)arr->pdata);
+  g_warning ("failed to reexec: %s", g_strerror (errno));
+  g_ptr_array_free (arr, TRUE);
+#if defined __linux__ || defined __FreeBSD__
+  g_free (buf);
+#elif defined __OpenBSD__
+  g_free (args);
+#endif
+}
+
+/**
+ * shell_global_notify_error:
+ * @global: a #ShellGlobal
+ * @msg: Error message
+ * @details: Error details
+ *
+ * Show a system error notification.  Use this function
+ * when a user-initiated action results in a non-fatal problem
+ * from causes that may not be under system control.  For
+ * example, an application crash.
+ */
+void
+shell_global_notify_error (ShellGlobal  *global,
+                           const char   *msg,
+                           const char   *details)
+{
+  g_signal_emit_by_name (global, "notify-error", msg, details);
+}
+
+/**
+ * shell_global_get_pointer:
+ * @global: the #ShellGlobal
+ * @x: (out): the X coordinate of the pointer, in global coordinates
+ * @y: (out): the Y coordinate of the pointer, in global coordinates
+ * @mods: (out): the current set of modifier keys that are pressed down
+ *
+ * Gets the pointer coordinates and current modifier key state.
+ */
+void
+shell_global_get_pointer (ShellGlobal         *global,
+                          int                 *x,
+                          int                 *y,
+                          ClutterModifierType *mods)
+{
+  ClutterModifierType raw_mods;
+  MetaCursorTracker *tracker;
+  graphene_point_t point;
+
+  tracker = meta_cursor_tracker_get_for_display (global->meta_display);
+  meta_cursor_tracker_get_pointer (tracker, &point, &raw_mods);
+
+  if (x)
+    *x = point.x;
+  if (y)
+    *y = point.y;
+
+  *mods = raw_mods & CLUTTER_MODIFIER_MASK;
+}
+
+/**
+ * shell_global_get_switcheroo_control:
+ * @global: A #ShellGlobal
+ *
+ * Get the global #GDBusProxy instance for the switcheroo-control
+ * daemon.
+ *
+ * Return value: (transfer none): the #GDBusProxy for the daemon,
+ *   or %NULL on error.
+ */
+GDBusProxy *
+shell_global_get_switcheroo_control (ShellGlobal  *global)
+{
+  return global->switcheroo_control;
+}
+
+/**
+ * shell_global_get_settings:
+ * @global: A #ShellGlobal
+ *
+ * Get the global GSettings instance.
+ *
+ * Return value: (transfer none): The GSettings object
+ */
+GSettings *
+shell_global_get_settings (ShellGlobal *global)
+{
+  return global->settings;
+}
+
+/**
+ * shell_global_get_current_time:
+ * @global: A #ShellGlobal
+ *
+ * Returns: the current X server time from the current Clutter, Gdk, or X
+ * event. If called from outside an event handler, this may return
+ * %Clutter.CURRENT_TIME (aka 0), or it may return a slightly
+ * out-of-date timestamp.
+ */
+guint32
+shell_global_get_current_time (ShellGlobal *global)
+{
+  guint32 time;
+
+  /* meta_display_get_current_time() will return the correct time
+     when handling an X or Gdk event, but will return CurrentTime
+     from some Clutter event callbacks.
+
+     clutter_get_current_event_time() will return the correct time
+     from a Clutter event callback, but may return CLUTTER_CURRENT_TIME
+     timestamp if called at other times.
+
+     So we try meta_display_get_current_time() first, since we
+     can recognize a "wrong" answer from that, and then fall back
+     to clutter_get_current_event_time().
+   */
+
+  time = meta_display_get_current_time (global->meta_display);
+  if (time != CLUTTER_CURRENT_TIME)
+    return time;
+
+  return clutter_get_current_event_time ();
+}
+
+static void
+shell_global_app_launched_cb (GAppLaunchContext *context,
+                              GAppInfo          *info,
+                              GVariant          *platform_data,
+                              gpointer           user_data)
+{
+  gint32 pid;
+  const gchar *app_name;
+
+  if (!g_variant_lookup (platform_data, "pid", "i", &pid))
+    return;
+
+  /* If pid == 0 the application was launched through D-Bus
+   * activation, therefore it's already in its own unit */
+  if (pid == 0)
+    return;
+
+  app_name = g_app_info_get_id (info);
+  if (app_name == NULL)
+    app_name = g_app_info_get_executable (info);
+
+  /* Start async request; we don't care about the result */
+  gnome_start_systemd_scope (app_name,
+                             pid,
+                             NULL,
+                             NULL,
+                             NULL, NULL, NULL);
+}
+
+/**
+ * shell_global_create_app_launch_context:
+ * @global: A #ShellGlobal
+ * @timestamp: the timestamp for the launch (or 0 for current time)
+ * @workspace: a workspace index, or -1 to indicate the current one
+ *
+ * Create a #GAppLaunchContext set up with the correct timestamp, and
+ * targeted to activate on the current workspace.
+ *
+ * Return value: (transfer full): A new #GAppLaunchContext
+ */
+GAppLaunchContext *
+shell_global_create_app_launch_context (ShellGlobal *global,
+                                        guint32      timestamp,
+                                        int          workspace)
+{
+  MetaWorkspaceManager *workspace_manager = global->workspace_manager;
+  MetaStartupNotification *sn;
+  MetaLaunchContext *context;
+  MetaWorkspace *ws = NULL;
+
+  sn = meta_display_get_startup_notification (global->meta_display);
+  context = meta_startup_notification_create_launcher (sn);
+
+  if (timestamp == 0)
+    timestamp = shell_global_get_current_time (global);
+  meta_launch_context_set_timestamp (context, timestamp);
+
+  if (workspace < 0)
+    ws = meta_workspace_manager_get_active_workspace (workspace_manager);
+  else
+    ws = meta_workspace_manager_get_workspace_by_index (workspace_manager, workspace);
+
+  meta_launch_context_set_workspace (context, ws);
+
+  g_signal_connect (context,
+                    "launched",
+                    G_CALLBACK (shell_global_app_launched_cb),
+                    NULL);
+
+  return (GAppLaunchContext *) context;
+}
+
+typedef struct
+{
+  ShellLeisureFunction func;
+  gpointer user_data;
+  GDestroyNotify notify;
+} LeisureClosure;
+
+static gboolean
+run_leisure_functions (gpointer data)
+{
+  ShellGlobal *global = data;
+  GSList *closures;
+  GSList *iter;
+
+  global->leisure_function_id = 0;
+
+  /* We started more work since we scheduled the idle */
+  if (global->work_count > 0)
+    return FALSE;
+
+  /* No leisure closures, so we are done */
+  if (global->leisure_closures == NULL)
+    return FALSE;
+
+  closures = global->leisure_closures;
+  global->leisure_closures = NULL;
+
+  for (iter = closures; iter; iter = iter->next)
+    {
+      LeisureClosure *closure = closures->data;
+      closure->func (closure->user_data);
+
+      if (closure->notify)
+        closure->notify (closure->user_data);
+
+      g_free (closure);
+    }
+
+  g_slist_free (closures);
+
+  return FALSE;
+}
+
+static void
+schedule_leisure_functions (ShellGlobal *global)
+{
+  /* This is called when we think we are ready to run leisure functions
+   * by our own accounting. We try to handle other types of business
+   * (like ClutterAnimation) by adding a low priority idle function.
+   *
+   * This won't work properly if the mainloop goes idle waiting for
+   * the vertical blanking interval or waiting for work being done
+   * in another thread.
+   */
+  if (!global->leisure_function_id)
+    {
+      global->leisure_function_id = g_idle_add_full (G_PRIORITY_LOW,
+                                                     run_leisure_functions,
+                                                     global, NULL);
+      g_source_set_name_by_id (global->leisure_function_id, "[gnome-shell] run_leisure_functions");
+    }
+}
+
+/**
+ * shell_global_begin_work:
+ * @global: the #ShellGlobal
+ *
+ * Marks that we are currently doing work. This is used to to track
+ * whether we are busy for the purposes of shell_global_run_at_leisure().
+ * A count is kept and shell_global_end_work() must be called exactly
+ * as many times as shell_global_begin_work().
+ */
+void
+shell_global_begin_work (ShellGlobal *global)
+{
+  global->work_count++;
+}
+
+/**
+ * shell_global_end_work:
+ * @global: the #ShellGlobal
+ *
+ * Marks the end of work that we started with shell_global_begin_work().
+ * If no other work is ongoing and functions have been added with
+ * shell_global_run_at_leisure(), they will be run at the next
+ * opportunity.
+ */
+void
+shell_global_end_work (ShellGlobal *global)
+{
+  g_return_if_fail (global->work_count > 0);
+
+  global->work_count--;
+  if (global->work_count == 0)
+    schedule_leisure_functions (global);
+
+}
+
+/**
+ * shell_global_run_at_leisure:
+ * @global: the #ShellGlobal
+ * @func: function to call at leisure
+ * @user_data: data to pass to @func
+ * @notify: function to call to free @user_data
+ *
+ * Schedules a function to be called the next time the shell is idle.
+ * Idle means here no animations, no redrawing, and no ongoing background
+ * work. Since there is currently no way to hook into the Clutter master
+ * clock and know when is running, the implementation here is somewhat
+ * approximation. Animations may be detected as terminating early if they
+ * can be drawn fast enough so that the event loop goes idle between frames.
+ *
+ * The intent of this function is for performance measurement runs
+ * where a number of actions should be run serially and each action is
+ * timed individually. Using this function for other purposes will
+ * interfere with the ability to use it for performance measurement so
+ * should be avoided.
+ */
+void
+shell_global_run_at_leisure (ShellGlobal         *global,
+                             ShellLeisureFunction func,
+                             gpointer             user_data,
+                             GDestroyNotify       notify)
+{
+  LeisureClosure *closure = g_new (LeisureClosure, 1);
+  closure->func = func;
+  closure->user_data = user_data;
+  closure->notify = notify;
+
+  global->leisure_closures = g_slist_append (global->leisure_closures,
+                                             closure);
+
+  if (global->work_count == 0)
+    schedule_leisure_functions (global);
+}
+
+const char *
+shell_global_get_session_mode (ShellGlobal *global)
+{
+  g_return_val_if_fail (SHELL_IS_GLOBAL (global), "user");
+
+  return global->session_mode;
+}
+
+static void
+delete_variant_cb (GObject      *object,
+                   GAsyncResult *result,
+                   gpointer      user_data)
+{
+  ShellGlobal *global = user_data;
+  GError *error = NULL;
+
+  if (!g_file_delete_finish (G_FILE (object), result, &error))
+    {
+      if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED) &&
+          !g_error_matches (error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND))
+        {
+          g_warning ("Could not delete runtime/persistent state file: %s\n",
+                     error->message);
+        }
+
+      g_error_free (error);
+    }
+
+  g_hash_table_remove (global->save_ops, object);
+}
+
+static void
+replace_contents_worker (GTask        *task,
+                         gpointer      source_object,
+                         gpointer      task_data,
+                         GCancellable *cancellable)
+{
+  GFile *file = source_object;
+  GBytes *bytes = task_data;
+  GError *error = NULL;
+  const gchar *data;
+  gsize len;
+
+  data = g_bytes_get_data (bytes, &len);
+
+  if (!g_file_replace_contents (file, data, len, NULL, FALSE,
+                                G_FILE_CREATE_REPLACE_DESTINATION,
+                                NULL, cancellable, &error))
+    g_task_return_error (task, g_steal_pointer (&error));
+  else
+    g_task_return_boolean (task, TRUE);
+}
+
+static void
+replace_contents_async (GFile               *path,
+                        GBytes              *bytes,
+                        GCancellable        *cancellable,
+                        GAsyncReadyCallback  callback,
+                        gpointer             user_data)
+{
+  g_autoptr(GTask) task = NULL;
+
+  g_assert (G_IS_FILE (path));
+  g_assert (bytes != NULL);
+  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
+
+  task = g_task_new (path, cancellable, callback, user_data);
+  g_task_set_source_tag (task, replace_contents_async);
+  g_task_set_task_data (task, g_bytes_ref (bytes), (GDestroyNotify)g_bytes_unref);
+  g_task_run_in_thread (task, replace_contents_worker);
+}
+
+static gboolean
+replace_contents_finish (GFile         *file,
+                         GAsyncResult  *result,
+                         GError       **error)
+{
+  return g_task_propagate_boolean (G_TASK (result), error);
+}
+
+static void
+replace_variant_cb (GObject      *object,
+                    GAsyncResult *result,
+                    gpointer      user_data)
+{
+  ShellGlobal *global = user_data;
+  GError *error = NULL;
+
+  if (!replace_contents_finish (G_FILE (object), result, &error))
+    {
+      if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
+        {
+          g_warning ("Could not replace runtime/persistent state file: %s\n",
+                     error->message);
+        }
+
+      g_error_free (error);
+    }
+
+  g_hash_table_remove (global->save_ops, object);
+}
+
+static void
+save_variant (ShellGlobal *global,
+              GFile       *dir,
+              const char  *property_name,
+              GVariant    *variant)
+{
+  GFile *path = g_file_get_child (dir, property_name);
+  GCancellable *cancellable;
+
+  cancellable = g_hash_table_lookup (global->save_ops, path);
+  g_cancellable_cancel (cancellable);
+
+  cancellable = g_cancellable_new ();
+  g_hash_table_insert (global->save_ops, g_object_ref (path), cancellable);
+
+  if (variant == NULL || g_variant_get_data (variant) == NULL)
+    {
+      g_file_delete_async (path, G_PRIORITY_DEFAULT, cancellable,
+                           delete_variant_cb, global);
+    }
+  else
+    {
+      g_autoptr(GBytes) bytes = NULL;
+
+      bytes = g_bytes_new_with_free_func (g_variant_get_data (variant),
+                                          g_variant_get_size (variant),
+                                          (GDestroyNotify)g_variant_unref,
+                                          g_variant_ref (variant));
+      /* g_file_replace_contents_async() can potentially fsync() from the
+       * calling thread when completing the asynchronous task. Instead, we
+       * want to force that fsync() to a thread to avoid blocking the
+       * compositor main loop. Using our own replace_contents_async()
+       * simply executes the operation synchronously from a thread.
+       */
+      replace_contents_async (path, bytes, cancellable, replace_variant_cb, global);
+    }
+
+  g_object_unref (path);
+}
+
+static GVariant *
+load_variant (GFile      *dir,
+              const char *property_type,
+              const char *property_name)
+{
+  GVariant *res = NULL;
+  GMappedFile *mfile;
+  GFile *path = g_file_get_child (dir, property_name);
+  char *pathstr;
+  GError *local_error = NULL;
+
+  pathstr = g_file_get_path (path);
+  mfile = g_mapped_file_new (pathstr, FALSE, &local_error);
+  if (!mfile)
+    {
+      if (!g_error_matches (local_error, G_FILE_ERROR, G_FILE_ERROR_NOENT))
+        {
+          g_warning ("Failed to open runtime state: %s", local_error->message);
+        }
+      g_clear_error (&local_error);
+    }
+  else
+    {
+      GBytes *bytes = g_mapped_file_get_bytes (mfile);
+      res = g_variant_new_from_bytes (G_VARIANT_TYPE (property_type), bytes, FALSE);
+      g_bytes_unref (bytes);
+      g_mapped_file_unref (mfile);
+    }
+
+  g_object_unref (path);
+  g_free (pathstr);
+
+  return res;
+}
+
+/**
+ * shell_global_set_runtime_state:
+ * @global: a #ShellGlobal
+ * @property_name: Name of the property
+ * @variant: (nullable): A #GVariant, or %NULL to unset
+ *
+ * Change the value of serialized runtime state.
+ */
+void
+shell_global_set_runtime_state (ShellGlobal  *global,
+                                const char   *property_name,
+                                GVariant     *variant)
+{
+  save_variant (global, global->runtime_state_path, property_name, variant);
+}
+
+/**
+ * shell_global_get_runtime_state:
+ * @global: a #ShellGlobal
+ * @property_type: Expected data type
+ * @property_name: Name of the property
+ *
+ * The shell maintains "runtime" state which does not persist across
+ * logout or reboot.
+ *
+ * Returns: (transfer floating): The value of a serialized property, or %NULL if none stored
+ */
+GVariant *
+shell_global_get_runtime_state (ShellGlobal  *global,
+                                const char   *property_type,
+                                const char   *property_name)
+{
+  return load_variant (global->runtime_state_path, property_type, property_name);
+}
+
+/**
+ * shell_global_set_persistent_state:
+ * @global: a #ShellGlobal
+ * @property_name: Name of the property
+ * @variant: (nullable): A #GVariant, or %NULL to unset
+ *
+ * Change the value of serialized persistent state.
+ */
+void
+shell_global_set_persistent_state (ShellGlobal *global,
+                                   const char  *property_name,
+                                   GVariant    *variant)
+{
+  save_variant (global, global->userdatadir_path, property_name, variant);
+}
+
+/**
+ * shell_global_get_persistent_state:
+ * @global: a #ShellGlobal
+ * @property_type: Expected data type
+ * @property_name: Name of the property
+ *
+ * The shell maintains "persistent" state which will persist after
+ * logout or reboot.
+ *
+ * Returns: (transfer none): The value of a serialized property, or %NULL if none stored
+ */
+GVariant *
+shell_global_get_persistent_state (ShellGlobal  *global,
+                                   const char   *property_type,
+                                   const char   *property_name)
+{
+  return load_variant (global->userdatadir_path, property_type, property_name);
+}
+
+void
+_shell_global_locate_pointer (ShellGlobal *global)
+{
+  g_signal_emit (global, shell_global_signals[LOCATE_POINTER], 0);
+}