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-rw-r--r--daemon/gdm-display-store.c331
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diff --git a/daemon/gdm-display-store.c b/daemon/gdm-display-store.c
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+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2007 William Jon McCann <mccann@jhu.edu>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+
+#include <glib.h>
+#include <glib/gi18n.h>
+#include <glib-object.h>
+
+#include "gdm-display-store.h"
+#include "gdm-display.h"
+
+struct GdmDisplayStorePrivate
+{
+ GHashTable *displays;
+};
+
+typedef struct
+{
+ GdmDisplayStore *store;
+ GdmDisplay *display;
+} StoredDisplay;
+
+enum {
+ DISPLAY_ADDED,
+ DISPLAY_REMOVED,
+ LAST_SIGNAL
+};
+
+static guint signals [LAST_SIGNAL] = { 0, };
+
+static void gdm_display_store_class_init (GdmDisplayStoreClass *klass);
+static void gdm_display_store_init (GdmDisplayStore *display_store);
+static void gdm_display_store_finalize (GObject *object);
+
+G_DEFINE_TYPE_WITH_PRIVATE (GdmDisplayStore, gdm_display_store, G_TYPE_OBJECT)
+
+static StoredDisplay *
+stored_display_new (GdmDisplayStore *store,
+ GdmDisplay *display)
+{
+ StoredDisplay *stored_display;
+
+ stored_display = g_slice_new (StoredDisplay);
+ stored_display->store = store;
+ stored_display->display = g_object_ref (display);
+
+ return stored_display;
+}
+
+static void
+stored_display_free (StoredDisplay *stored_display)
+{
+ g_signal_emit (G_OBJECT (stored_display->store),
+ signals[DISPLAY_REMOVED],
+ 0,
+ stored_display->display);
+
+ g_debug ("GdmDisplayStore: Unreffing display: %p",
+ stored_display->display);
+ g_object_unref (stored_display->display);
+
+ g_slice_free (StoredDisplay, stored_display);
+}
+
+GQuark
+gdm_display_store_error_quark (void)
+{
+ static GQuark ret = 0;
+ if (ret == 0) {
+ ret = g_quark_from_static_string ("gdm_display_store_error");
+ }
+
+ return ret;
+}
+
+void
+gdm_display_store_clear (GdmDisplayStore *store)
+{
+ g_return_if_fail (store != NULL);
+ g_debug ("GdmDisplayStore: Clearing display store");
+ g_hash_table_remove_all (store->priv->displays);
+}
+
+static gboolean
+remove_display (char *id,
+ GdmDisplay *display,
+ GdmDisplay *display_to_remove)
+{
+ if (display == display_to_remove) {
+ return TRUE;
+ }
+ return FALSE;
+}
+
+gboolean
+gdm_display_store_remove (GdmDisplayStore *store,
+ GdmDisplay *display)
+{
+ g_return_val_if_fail (store != NULL, FALSE);
+
+ gdm_display_store_foreach_remove (store,
+ (GdmDisplayStoreFunc)remove_display,
+ display);
+ return FALSE;
+}
+
+typedef struct
+{
+ GdmDisplayStoreFunc predicate;
+ gpointer user_data;
+} FindClosure;
+
+static gboolean
+find_func (const char *id,
+ StoredDisplay *stored_display,
+ FindClosure *closure)
+{
+ return closure->predicate (id,
+ stored_display->display,
+ closure->user_data);
+}
+
+static void
+foreach_func (const char *id,
+ StoredDisplay *stored_display,
+ FindClosure *closure)
+{
+ (void) closure->predicate (id,
+ stored_display->display,
+ closure->user_data);
+}
+
+void
+gdm_display_store_foreach (GdmDisplayStore *store,
+ GdmDisplayStoreFunc func,
+ gpointer user_data)
+{
+ FindClosure closure;
+
+ g_return_if_fail (store != NULL);
+ g_return_if_fail (func != NULL);
+
+ closure.predicate = func;
+ closure.user_data = user_data;
+
+ g_hash_table_foreach (store->priv->displays,
+ (GHFunc) foreach_func,
+ &closure);
+}
+
+GdmDisplay *
+gdm_display_store_lookup (GdmDisplayStore *store,
+ const char *id)
+{
+ StoredDisplay *stored_display;
+
+ g_return_val_if_fail (store != NULL, NULL);
+ g_return_val_if_fail (id != NULL, NULL);
+
+ stored_display = g_hash_table_lookup (store->priv->displays,
+ id);
+ if (stored_display == NULL) {
+ return NULL;
+ }
+
+ return stored_display->display;
+}
+
+GdmDisplay *
+gdm_display_store_find (GdmDisplayStore *store,
+ GdmDisplayStoreFunc predicate,
+ gpointer user_data)
+{
+ StoredDisplay *stored_display;
+ FindClosure closure;
+
+ g_return_val_if_fail (store != NULL, NULL);
+ g_return_val_if_fail (predicate != NULL, NULL);
+
+ closure.predicate = predicate;
+ closure.user_data = user_data;
+
+ stored_display = g_hash_table_find (store->priv->displays,
+ (GHRFunc) find_func,
+ &closure);
+
+ if (stored_display == NULL) {
+ return NULL;
+ }
+
+ return stored_display->display;
+}
+
+guint
+gdm_display_store_foreach_remove (GdmDisplayStore *store,
+ GdmDisplayStoreFunc func,
+ gpointer user_data)
+{
+ FindClosure closure;
+ guint ret;
+
+ g_return_val_if_fail (store != NULL, 0);
+ g_return_val_if_fail (func != NULL, 0);
+
+ closure.predicate = func;
+ closure.user_data = user_data;
+
+ ret = g_hash_table_foreach_remove (store->priv->displays,
+ (GHRFunc) find_func,
+ &closure);
+ return ret;
+}
+
+void
+gdm_display_store_add (GdmDisplayStore *store,
+ GdmDisplay *display)
+{
+ char *id;
+ StoredDisplay *stored_display;
+
+ g_return_if_fail (store != NULL);
+ g_return_if_fail (display != NULL);
+
+ gdm_display_get_id (display, &id, NULL);
+
+ g_debug ("GdmDisplayStore: Adding display %s to store", id);
+
+ stored_display = stored_display_new (store, display);
+ g_hash_table_insert (store->priv->displays,
+ id,
+ stored_display);
+
+ g_signal_emit (G_OBJECT (store),
+ signals[DISPLAY_ADDED],
+ 0,
+ id);
+}
+
+static void
+gdm_display_store_class_init (GdmDisplayStoreClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+ object_class->finalize = gdm_display_store_finalize;
+
+ signals [DISPLAY_ADDED] =
+ g_signal_new ("display-added",
+ G_TYPE_FROM_CLASS (object_class),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (GdmDisplayStoreClass, display_added),
+ NULL,
+ NULL,
+ g_cclosure_marshal_VOID__STRING,
+ G_TYPE_NONE,
+ 1, G_TYPE_STRING);
+ signals [DISPLAY_REMOVED] =
+ g_signal_new ("display-removed",
+ G_TYPE_FROM_CLASS (object_class),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (GdmDisplayStoreClass, display_removed),
+ NULL,
+ NULL,
+ g_cclosure_marshal_VOID__OBJECT,
+ G_TYPE_NONE,
+ 1, G_TYPE_OBJECT);
+}
+
+static void
+gdm_display_store_init (GdmDisplayStore *store)
+{
+
+ store->priv = gdm_display_store_get_instance_private (store);
+
+ store->priv->displays = g_hash_table_new_full (g_str_hash,
+ g_str_equal,
+ g_free,
+ (GDestroyNotify)
+ stored_display_free);
+}
+
+static void
+gdm_display_store_finalize (GObject *object)
+{
+ GdmDisplayStore *store;
+
+ g_return_if_fail (object != NULL);
+ g_return_if_fail (GDM_IS_DISPLAY_STORE (object));
+
+ store = GDM_DISPLAY_STORE (object);
+
+ g_return_if_fail (store->priv != NULL);
+
+ g_hash_table_destroy (store->priv->displays);
+
+ G_OBJECT_CLASS (gdm_display_store_parent_class)->finalize (object);
+}
+
+GdmDisplayStore *
+gdm_display_store_new (void)
+{
+ GObject *object;
+
+ object = g_object_new (GDM_TYPE_DISPLAY_STORE,
+ NULL);
+
+ return GDM_DISPLAY_STORE (object);
+}
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