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diff --git a/libgimp/gimppaletteselect.c b/libgimp/gimppaletteselect.c
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+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * gimppaletteselect.c
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include "gimp.h"
+
+
+typedef struct
+{
+ gchar *palette_callback;
+ guint idle_id;
+ gchar *palette_name;
+ gint num_colors;
+ GimpRunPaletteCallback callback;
+ gboolean closing;
+ gpointer data;
+} GimpPaletteData;
+
+
+/* local function prototypes */
+
+static void gimp_palette_data_free (GimpPaletteData *data);
+
+static void gimp_temp_palette_run (const gchar *name,
+ gint nparams,
+ const GimpParam *param,
+ gint *nreturn_vals,
+ GimpParam **return_vals);
+static gboolean gimp_temp_palette_run_idle (GimpPaletteData *palette_data);
+
+
+/* private variables */
+
+static GHashTable *gimp_palette_select_ht = NULL;
+
+
+/* public functions */
+
+const gchar *
+gimp_palette_select_new (const gchar *title,
+ const gchar *palette_name,
+ GimpRunPaletteCallback callback,
+ gpointer data)
+{
+ static const GimpParamDef args[] =
+ {
+ { GIMP_PDB_STRING, "str", "String" },
+ { GIMP_PDB_INT32, "num-colors", "Number of colors" },
+ { GIMP_PDB_INT32, "dialog-status", "If the dialog was closing "
+ "[0 = No, 1 = Yes]" }
+ };
+
+ gchar *palette_callback = gimp_procedural_db_temp_name ();
+
+ gimp_install_temp_proc (palette_callback,
+ "Temporary palette popup callback procedure",
+ "",
+ "",
+ "",
+ "",
+ NULL,
+ "",
+ GIMP_TEMPORARY,
+ G_N_ELEMENTS (args), 0,
+ args, NULL,
+ gimp_temp_palette_run);
+
+ if (gimp_palettes_popup (palette_callback, title, palette_name))
+ {
+ GimpPaletteData *palette_data;
+
+ gimp_extension_enable (); /* Allow callbacks to be watched */
+
+ /* Now add to hash table so we can find it again */
+ if (! gimp_palette_select_ht)
+ {
+ gimp_palette_select_ht =
+ g_hash_table_new_full (g_str_hash, g_str_equal,
+ g_free,
+ (GDestroyNotify) gimp_palette_data_free);
+ }
+
+ palette_data = g_slice_new0 (GimpPaletteData);
+
+ palette_data->palette_callback = palette_callback;
+ palette_data->callback = callback;
+ palette_data->data = data;
+
+ g_hash_table_insert (gimp_palette_select_ht,
+ palette_callback, palette_data);
+
+ return palette_callback;
+ }
+
+ gimp_uninstall_temp_proc (palette_callback);
+ g_free (palette_callback);
+
+ return NULL;
+}
+
+void
+gimp_palette_select_destroy (const gchar *palette_callback)
+{
+ GimpPaletteData *palette_data;
+
+ g_return_if_fail (palette_callback != NULL);
+ g_return_if_fail (gimp_palette_select_ht != NULL);
+
+ palette_data = g_hash_table_lookup (gimp_palette_select_ht, palette_callback);
+
+ if (! palette_data)
+ {
+ g_warning ("Can't find internal palette data");
+ return;
+ }
+
+ if (palette_data->idle_id)
+ g_source_remove (palette_data->idle_id);
+
+ g_free (palette_data->palette_name);
+
+ if (palette_data->palette_callback)
+ gimp_palettes_close_popup (palette_data->palette_callback);
+
+ gimp_uninstall_temp_proc (palette_callback);
+
+ g_hash_table_remove (gimp_palette_select_ht, palette_callback);
+}
+
+
+/* private functions */
+
+static void
+gimp_palette_data_free (GimpPaletteData *data)
+{
+ g_slice_free (GimpPaletteData, data);
+}
+
+static void
+gimp_temp_palette_run (const gchar *name,
+ gint nparams,
+ const GimpParam *param,
+ gint *nreturn_vals,
+ GimpParam **return_vals)
+{
+ static GimpParam values[1];
+ GimpPaletteData *palette_data;
+
+ palette_data = g_hash_table_lookup (gimp_palette_select_ht, name);
+
+ if (! palette_data)
+ {
+ g_warning ("Can't find internal palette data");
+ }
+ else
+ {
+ g_free (palette_data->palette_name);
+
+ palette_data->palette_name = g_strdup (param[0].data.d_string);
+ palette_data->num_colors = param[1].data.d_int32;
+ palette_data->closing = param[2].data.d_int32;
+
+ if (! palette_data->idle_id)
+ palette_data->idle_id = g_idle_add ((GSourceFunc) gimp_temp_palette_run_idle,
+ palette_data);
+ }
+
+ *nreturn_vals = 1;
+ *return_vals = values;
+
+ values[0].type = GIMP_PDB_STATUS;
+ values[0].data.d_status = GIMP_PDB_SUCCESS;
+}
+
+static gboolean
+gimp_temp_palette_run_idle (GimpPaletteData *palette_data)
+{
+ palette_data->idle_id = 0;
+
+ if (palette_data->callback)
+ palette_data->callback (palette_data->palette_name,
+ palette_data->closing,
+ palette_data->data);
+
+ if (palette_data->closing)
+ {
+ gchar *palette_callback = palette_data->palette_callback;
+
+ palette_data->palette_callback = NULL;
+ gimp_palette_select_destroy (palette_callback);
+ }
+
+ return FALSE;
+}