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-rw-r--r--app/core/gimp-internal-data.c346
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diff --git a/app/core/gimp-internal-data.c b/app/core/gimp-internal-data.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995-2002 Spencer Kimball, Peter Mattis, and others
+ *
+ * gimp-internal-data.c
+ * Copyright (C) 2017 Ell
+ *
+ * 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 3 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, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "libgimpbase/gimpbase.h"
+
+#include "core-types.h"
+
+#include "gimp.h"
+#include "gimp-gradients.h"
+#include "gimp-internal-data.h"
+#include "gimpdata.h"
+#include "gimpdataloaderfactory.h"
+#include "gimperror.h"
+#include "gimpgradient-load.h"
+
+#include "gimp-intl.h"
+
+
+#define GIMP_INTERNAL_DATA_DIRECTORY "internal-data"
+
+
+typedef GimpData * (* GimpDataGetFunc) (Gimp *gimp);
+
+
+typedef struct _GimpInternalDataFile GimpInternalDataFile;
+
+struct _GimpInternalDataFile
+{
+ const gchar *name;
+ GimpDataGetFunc get_func;
+ GimpDataLoadFunc load_func;
+};
+
+
+/* local function prototypes */
+
+static gboolean gimp_internal_data_create_directory (GError **error);
+
+static GFile * gimp_internal_data_get_file (const GimpInternalDataFile *data_file);
+
+static gboolean gimp_internal_data_load_data_file (Gimp *gimp,
+ const GimpInternalDataFile *data_file,
+ GError **error);
+static gboolean gimp_internal_data_save_data_file (Gimp *gimp,
+ const GimpInternalDataFile *data_file,
+ GError **error);
+static gboolean gimp_internal_data_delete_data_file (Gimp *gimp,
+ const GimpInternalDataFile *data_file,
+ GError **error);
+
+/* static variables */
+
+static const GimpInternalDataFile internal_data_files[] =
+{
+ /* Custom gradient */
+ {
+ .name = "custom" GIMP_GRADIENT_FILE_EXTENSION,
+ .get_func = (GimpDataGetFunc) gimp_gradients_get_custom,
+ .load_func = gimp_gradient_load
+ }
+};
+
+
+/* public functions */
+
+gboolean
+gimp_internal_data_load (Gimp *gimp,
+ GError **error)
+{
+ gint i;
+
+ g_return_val_if_fail (GIMP_IS_GIMP (gimp), FALSE);
+ g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
+
+ for (i = 0; i < G_N_ELEMENTS (internal_data_files); i++)
+ {
+ const GimpInternalDataFile *data_file = &internal_data_files[i];
+
+ if (! gimp_internal_data_load_data_file (gimp, data_file, error))
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+gboolean
+gimp_internal_data_save (Gimp *gimp,
+ GError **error)
+{
+ gint i;
+
+ g_return_val_if_fail (GIMP_IS_GIMP (gimp), FALSE);
+ g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
+
+ if (! gimp_internal_data_create_directory (error))
+ return FALSE;
+
+ for (i = 0; i < G_N_ELEMENTS (internal_data_files); i++)
+ {
+ const GimpInternalDataFile *data_file = &internal_data_files[i];
+
+ if (! gimp_internal_data_save_data_file (gimp, data_file, error))
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+gboolean
+gimp_internal_data_clear (Gimp *gimp,
+ GError **error)
+{
+ gint i;
+
+ g_return_val_if_fail (GIMP_IS_GIMP (gimp), FALSE);
+ g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
+
+ for (i = 0; i < G_N_ELEMENTS (internal_data_files); i++)
+ {
+ const GimpInternalDataFile *data_file = &internal_data_files[i];
+
+ if (! gimp_internal_data_delete_data_file (gimp, data_file, error))
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+
+/* private functions */
+
+static gboolean
+gimp_internal_data_create_directory (GError **error)
+{
+ GFile *directory;
+ GError *my_error = NULL;
+ gboolean success;
+
+ directory = gimp_directory_file (GIMP_INTERNAL_DATA_DIRECTORY, NULL);
+
+ success = g_file_make_directory (directory, NULL, &my_error);
+
+ g_object_unref (directory);
+
+ if (! success)
+ {
+ if (my_error->code == G_IO_ERROR_EXISTS)
+ {
+ g_clear_error (&my_error);
+ success = TRUE;
+ }
+ else
+ {
+ g_propagate_error (error, my_error);
+ }
+ }
+
+ return success;
+}
+
+static GFile *
+gimp_internal_data_get_file (const GimpInternalDataFile *data_file)
+{
+ return gimp_directory_file (GIMP_INTERNAL_DATA_DIRECTORY,
+ data_file->name,
+ NULL);
+}
+
+static gboolean
+gimp_internal_data_load_data_file (Gimp *gimp,
+ const GimpInternalDataFile *data_file,
+ GError **error)
+{
+ GFile *file;
+ GInputStream *input;
+ GimpData *data;
+ GList *list;
+ GError *my_error = NULL;
+
+ file = gimp_internal_data_get_file (data_file);
+
+ if (gimp->be_verbose)
+ g_print ("Parsing '%s'\n", gimp_file_get_utf8_name (file));
+
+ input = G_INPUT_STREAM (g_file_read (file, NULL, &my_error));
+
+ if (! input)
+ {
+ g_object_unref (file);
+
+ if (my_error->code == G_IO_ERROR_NOT_FOUND)
+ {
+ g_clear_error (&my_error);
+ return TRUE;
+ }
+ else
+ {
+ g_propagate_error (error, my_error);
+ return FALSE;
+ }
+ }
+
+ list = data_file->load_func (gimp->user_context, file, input, error);
+
+ g_object_unref (input);
+ g_object_unref (file);
+
+ if (! list)
+ return FALSE;
+
+ data = data_file->get_func (gimp);
+
+ gimp_data_copy (data, GIMP_DATA (list->data));
+
+ g_list_free_full (list, g_object_unref);
+
+ return TRUE;
+}
+
+static gboolean
+gimp_internal_data_save_data_file (Gimp *gimp,
+ const GimpInternalDataFile *data_file,
+ GError **error)
+{
+ GFile *file;
+ GOutputStream *output;
+ GimpData *data;
+ gboolean success;
+
+ file = gimp_internal_data_get_file (data_file);
+
+ if (gimp->be_verbose)
+ g_print ("Writing '%s'\n", gimp_file_get_utf8_name (file));
+
+ output = G_OUTPUT_STREAM (g_file_replace (file, NULL, FALSE,
+ G_FILE_CREATE_NONE,
+ NULL, error));
+
+ if (! output)
+ {
+ g_object_unref (file);
+
+ return FALSE;
+ }
+
+ data = data_file->get_func (gimp);
+
+ /* we bypass gimp_data_save() and call the data's save() virtual function
+ * directly, since gimp_data_save() is a nop for internal data.
+ *
+ * FIXME: we save the data whether it's dirty or not, since it might not
+ * exist on disk. currently, we only use this for cheap data, such as
+ * gradients, so this is not a big concern, but if we save more expensive
+ * data in the future, we should fix this.
+ */
+ gimp_assert (GIMP_DATA_GET_CLASS (data)->save);
+ success = GIMP_DATA_GET_CLASS (data)->save (data, output, error);
+
+ if (success)
+ {
+ if (! g_output_stream_close (output, NULL, error))
+ {
+ g_prefix_error (error,
+ _("Error saving '%s': "),
+ gimp_file_get_utf8_name (file));
+ success = FALSE;
+ }
+ }
+ else
+ {
+ GCancellable *cancellable = g_cancellable_new ();
+
+ g_cancellable_cancel (cancellable);
+ if (error && *error)
+ {
+ g_prefix_error (error,
+ _("Error saving '%s': "),
+ gimp_file_get_utf8_name (file));
+ }
+ else
+ {
+ g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_WRITE,
+ _("Error saving '%s'"),
+ gimp_file_get_utf8_name (file));
+ }
+ g_output_stream_close (output, cancellable, NULL);
+ g_object_unref (cancellable);
+ }
+
+ g_object_unref (output);
+ g_object_unref (file);
+
+ return success;
+}
+
+static gboolean
+gimp_internal_data_delete_data_file (Gimp *gimp,
+ const GimpInternalDataFile *data_file,
+ GError **error)
+{
+ GFile *file;
+ GError *my_error = NULL;
+ gboolean success = TRUE;
+
+ file = gimp_internal_data_get_file (data_file);
+
+ if (gimp->be_verbose)
+ g_print ("Deleting '%s'\n", gimp_file_get_utf8_name (file));
+
+ if (! g_file_delete (file, NULL, &my_error) &&
+ my_error->code != G_IO_ERROR_NOT_FOUND)
+ {
+ success = FALSE;
+
+ g_set_error (error, GIMP_ERROR, GIMP_FAILED,
+ _("Deleting \"%s\" failed: %s"),
+ gimp_file_get_utf8_name (file), my_error->message);
+ }
+
+ g_clear_error (&my_error);
+ g_object_unref (file);
+
+ return success;
+}
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