Adding upstream version 3.0.4.

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

plug-ins/script-fu/console/script-fu-console-editor.c

@@ -0,0 +1,93 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * 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 <gtk/gtk.h>
+
+#include "script-fu-console-editor.h"
+
+
+/* ConsoleEditor
+
+ * An API that abstracts these GtkWidgets for editing text:
+ * - GtkTextEntry is single line,
+ * - GtkTextView is multiline.
+ *
+ * So that we can swap out or enhance widget without affecting main logic.
+ *
+ * Not a defined class but methods conform to naming and calling conventions.
+ *
+ * Is-a GtkWidget.
+ */
+
+/* FUTURE
+ * GtkTextEntry => GtkTextView (multiline)
+ *
+ * Possibly: an editor that understands syntax and highlighting.
+ */
+
+GtkWidget *
+console_editor_new (void)
+{
+  return gtk_entry_new ();
+}
+
+/* Set editor's text and position the cursor.
+ * @position conforms to GtkEditable interface.
+ */
+void
+console_editor_set_text_and_position (GtkWidget   *self,
+                                      const gchar *text,
+                                      gint         position)
+{
+  /* gtk_entry_set_text not allow NULL */
+  if (text != NULL)
+    gtk_entry_set_text (GTK_ENTRY (self), text);
+  gtk_editable_set_position (GTK_EDITABLE (self), position);
+}
+
+void
+console_editor_clear (GtkWidget *self)
+{
+  console_editor_set_text_and_position (self, "", -1);
+}
+
+const gchar *
+console_editor_get_text (GtkWidget *self)
+{
+  return gtk_entry_get_text (GTK_ENTRY (self));
+}
+
+gboolean
+console_editor_is_empty (GtkWidget *self)
+{
+  const gchar *str;
+
+  if ((str = console_editor_get_text (self)) == NULL)
+    return TRUE;
+
+  while (*str)
+    {
+      if (*str != ' ' && *str != '\t' && *str != '\n')
+        return FALSE;
+
+      str ++;
+    }
+
+  return TRUE;
+}