1 files changed, 220 insertions, 0 deletions
diff --git a/app/text/gimptextlayer-xcf.c b/app/text/gimptextlayer-xcf.c
new file mode 100644
index 0000000..33452a1
--- /dev/null
+++ b/app/text/gimptextlayer-xcf.c
@@ -0,0 +1,220 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * GimpText
+ * Copyright (C) 2003  Sven Neumann <sven@gimp.org>
+ *
+ * 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 <cairo.h>
+
+#include "libgimpbase/gimpbase.h"
+#include "text-types.h"
+
+#include "core/gimp.h"
+#include "core/gimpdrawable-private.h" /* eek */
+#include "core/gimpimage.h"
+#include "core/gimpparasitelist.h"
+
+#include "gimptext.h"
+#include "gimptext-parasite.h"
+#include "gimptextlayer.h"
+#include "gimptextlayer-xcf.h"
+
+#include "gimp-intl.h"
+
+
+enum
+{
+  TEXT_LAYER_XCF_NONE              = 0,
+  TEXT_LAYER_XCF_DONT_AUTO_RENAME  = 1 << 0,
+  TEXT_LAYER_XCF_MODIFIED          = 1 << 1
+};
+
+
+static GimpLayer * gimp_text_layer_from_layer (GimpLayer *layer,
+                                               GimpText  *text);
+
+
+gboolean
+gimp_text_layer_xcf_load_hack (GimpLayer **layer)
+{
+  const gchar        *name;
+  GimpText           *text = NULL;
+  const GimpParasite *parasite;
+
+  g_return_val_if_fail (layer != NULL, FALSE);
+  g_return_val_if_fail (GIMP_IS_LAYER (*layer), FALSE);
+
+  name = gimp_text_parasite_name ();
+  parasite = gimp_item_parasite_find (GIMP_ITEM (*layer), name);
+
+  if (parasite)
+    {
+      GError *error = NULL;
+
+      text = gimp_text_from_parasite (parasite, &error);
+
+      if (error)
+        {
+          gimp_message (gimp_item_get_image (GIMP_ITEM (*layer))->gimp, NULL,
+                        GIMP_MESSAGE_ERROR,
+                        _("Problems parsing the text parasite for layer '%s':\n"
+                          "%s\n\n"
+                          "Some text properties may be wrong. "
+                          "Unless you want to edit the text layer, "
+                          "you don't need to worry about this."),
+                        gimp_object_get_name (*layer),
+                        error->message);
+          g_clear_error (&error);
+        }
+    }
+  else
+    {
+      name = gimp_text_gdyntext_parasite_name ();
+
+      parasite = gimp_item_parasite_find (GIMP_ITEM (*layer), name);
+
+      if (parasite)
+        text = gimp_text_from_gdyntext_parasite (parasite);
+    }
+
+  if (text)
+    {
+      *layer = gimp_text_layer_from_layer (*layer, text);
+
+      /*  let the text layer knows what parasite was used to create it  */
+      GIMP_TEXT_LAYER (*layer)->text_parasite = name;
+    }
+
+  return (text != NULL);
+}
+
+void
+gimp_text_layer_xcf_save_prepare (GimpTextLayer *layer)
+{
+  GimpText *text;
+
+  g_return_if_fail (GIMP_IS_TEXT_LAYER (layer));
+
+  /*  If the layer has a text parasite already, it wasn't changed and we
+   *  can simply save the original parasite back which is still attached.
+   */
+  if (layer->text_parasite)
+    return;
+
+  text = gimp_text_layer_get_text (layer);
+  if (text)
+    {
+      GimpParasite *parasite = gimp_text_to_parasite (text);
+
+      /*  Don't push an undo because the parasite only exists temporarily
+       *  while the text layer is saved to XCF.
+       */
+      gimp_item_parasite_attach (GIMP_ITEM (layer), parasite, FALSE);
+
+      gimp_parasite_free (parasite);
+    }
+}
+
+guint32
+gimp_text_layer_get_xcf_flags (GimpTextLayer *text_layer)
+{
+  guint flags = 0;
+
+  g_return_val_if_fail (GIMP_IS_TEXT_LAYER (text_layer), 0);
+
+  if (! text_layer->auto_rename)
+    flags |= TEXT_LAYER_XCF_DONT_AUTO_RENAME;
+
+  if (text_layer->modified)
+    flags |= TEXT_LAYER_XCF_MODIFIED;
+
+  return flags;
+}
+
+void
+gimp_text_layer_set_xcf_flags (GimpTextLayer *text_layer,
+                               guint32        flags)
+{
+  g_return_if_fail (GIMP_IS_TEXT_LAYER (text_layer));
+
+  g_object_set (text_layer,
+                "auto-rename", (flags & TEXT_LAYER_XCF_DONT_AUTO_RENAME) == 0,
+                "modified",    (flags & TEXT_LAYER_XCF_MODIFIED)         != 0,
+                NULL);
+}
+
+
+/**
+ * gimp_text_layer_from_layer:
+ * @layer: a #GimpLayer object
+ * @text: a #GimpText object
+ *
+ * Converts a standard #GimpLayer and a #GimpText object into a
+ * #GimpTextLayer. The new text layer takes ownership of the @text and
+ * @layer objects.  The @layer object is rendered unusable by this
+ * function. Don't even try to use if afterwards!
+ *
+ * This is a gross hack that is needed in order to load text layers
+ * from XCF files in a backwards-compatible way. Please don't use it
+ * for anything else!
+ *
+ * Return value: a newly allocated #GimpTextLayer object
+ **/
+static GimpLayer *
+gimp_text_layer_from_layer (GimpLayer *layer,
+                            GimpText  *text)
+{
+  GimpTextLayer *text_layer;
+  GimpDrawable  *drawable;
+
+  g_return_val_if_fail (GIMP_IS_LAYER (layer), NULL);
+  g_return_val_if_fail (GIMP_IS_TEXT (text), NULL);
+
+  text_layer = g_object_new (GIMP_TYPE_TEXT_LAYER,
+                             "image", gimp_item_get_image (GIMP_ITEM (layer)),
+                             NULL);
+
+  gimp_item_replace_item (GIMP_ITEM (text_layer), GIMP_ITEM (layer));
+
+  drawable = GIMP_DRAWABLE (text_layer);
+
+  gimp_drawable_steal_buffer (drawable, GIMP_DRAWABLE (layer));
+
+  gimp_layer_set_opacity         (GIMP_LAYER (text_layer),
+                                  gimp_layer_get_opacity (layer), FALSE);
+  gimp_layer_set_mode            (GIMP_LAYER (text_layer),
+                                  gimp_layer_get_mode (layer), FALSE);
+  gimp_layer_set_blend_space     (GIMP_LAYER (text_layer),
+                                  gimp_layer_get_blend_space (layer), FALSE);
+  gimp_layer_set_composite_space (GIMP_LAYER (text_layer),
+                                  gimp_layer_get_composite_space (layer), FALSE);
+  gimp_layer_set_composite_mode  (GIMP_LAYER (text_layer),
+                                  gimp_layer_get_composite_mode (layer), FALSE);
+  gimp_layer_set_lock_alpha      (GIMP_LAYER (text_layer),
+                                  gimp_layer_get_lock_alpha (layer), FALSE);
+
+  gimp_text_layer_set_text (text_layer, text);
+
+  g_object_unref (text);
+  g_object_unref (layer);
+
+  return GIMP_LAYER (text_layer);
+}