[gimp] app: Only show 'File->Overwrite' if the source URI has an exporter

[Martin Nordholts <martinn src gnome org>]

commit 51cd8c2981c480a0e2ff2ecf0c45f4763f5d4196
Author: Martin Nordholts <martinn src gnome org>
Date:   Fri Aug 21 21:39:54 2009 +0200

    app: Only show 'File->Overwrite' if the source URI has an exporter

 app/actions/file-actions.c           |   25 +++++++++++++++++--------
 app/plug-in/gimppluginmanager-file.c |    7 +++++++
 app/plug-in/gimppluginmanager-file.h |    2 ++
 3 files changed, 26 insertions(+), 8 deletions(-)
---
diff --git a/app/actions/file-actions.c b/app/actions/file-actions.c
index 2b4deaf..83dc749 100644
--- a/app/actions/file-actions.c
+++ b/app/actions/file-actions.c
@@ -35,6 +35,8 @@
 #include "file/file-utils.h"
 #include "file/gimp-file.h"
 
+#include "plug-in/gimppluginmanager-file.h"
+
 #include "widgets/gimpaction.h"
 #include "widgets/gimpactiongroup.h"
 #include "widgets/gimphelp-ids.h"
@@ -246,10 +248,12 @@ void
 file_actions_update (GimpActionGroup *group,
                      gpointer         data)
 {
-  GimpImage    *image     = action_data_get_image (data);
-  GimpDrawable *drawable  = NULL;
-  const gchar  *source    = NULL;
-  const gchar  *export_to = NULL;
+  Gimp         *gimp           = action_data_get_gimp (data);
+  GimpImage    *image          = action_data_get_image (data);
+  GimpDrawable *drawable       = NULL;
+  const gchar  *source         = NULL;
+  const gchar  *export_to      = NULL;
+  gboolean      show_overwrite = FALSE;
 
   if (image)
     {
@@ -260,6 +264,11 @@ file_actions_update (GimpActionGroup *group,
                                      GIMP_FILE_EXPORT_TO_URI_KEY);
     }
 
+  show_overwrite =
+    (source &&
+     gimp_plug_in_manager_uri_has_exporter (gimp->plug_in_manager,
+                                            source));
+
 #define SET_VISIBLE(action,condition) \
         gimp_action_group_set_action_visible (group, action, (condition) != 0)
 #define SET_SENSITIVE(action,condition) \
@@ -270,9 +279,9 @@ file_actions_update (GimpActionGroup *group,
   SET_SENSITIVE ("file-save-a-copy",     image && drawable);
   SET_SENSITIVE ("file-revert",          image && (GIMP_OBJECT (image)->name || source));
   SET_SENSITIVE ("file-export-to",       export_to);
-  SET_VISIBLE   ("file-export-to",       export_to || ! source);
-  SET_SENSITIVE ("file-overwrite",       source);
-  SET_VISIBLE   ("file-overwrite",       source);
+  SET_VISIBLE   ("file-export-to",       export_to || ! show_overwrite);
+  SET_SENSITIVE ("file-overwrite",       show_overwrite);
+  SET_VISIBLE   ("file-overwrite",       show_overwrite);
   SET_SENSITIVE ("file-export",          image && drawable);
   SET_SENSITIVE ("file-create-template", image);
 
@@ -284,7 +293,7 @@ file_actions_update (GimpActionGroup *group,
       gimp_action_group_set_action_label (group, "file-export-to", label);
       g_free (label);
     }
-  else if (source)
+  else if (show_overwrite)
     {
       gchar *label;
       label = g_strdup_printf (_("Overwrite %s"),
diff --git a/app/plug-in/gimppluginmanager-file.c b/app/plug-in/gimppluginmanager-file.c
index 1903783..15d6aa3 100644
--- a/app/plug-in/gimppluginmanager-file.c
+++ b/app/plug-in/gimppluginmanager-file.c
@@ -203,3 +203,10 @@ gimp_plug_in_manager_register_thumb_loader (GimpPlugInManager *manager,
 
   return TRUE;
 }
+
+gboolean
+gimp_plug_in_manager_uri_has_exporter (GimpPlugInManager *manager,
+                                       const gchar       *uri)
+{
+  return file_procedure_find (manager->export_procs, uri, NULL) != NULL;
+}
diff --git a/app/plug-in/gimppluginmanager-file.h b/app/plug-in/gimppluginmanager-file.h
index 50a31af..0aa3a2b 100644
--- a/app/plug-in/gimppluginmanager-file.h
+++ b/app/plug-in/gimppluginmanager-file.h
@@ -38,6 +38,8 @@ gboolean   gimp_plug_in_manager_register_mime_type    (GimpPlugInManager *manage
 gboolean   gimp_plug_in_manager_register_thumb_loader (GimpPlugInManager *manager,
                                                        const gchar       *load_proc,
                                                        const gchar       *thumb_proc);
+gboolean   gimp_plug_in_manager_uri_has_exporter      (GimpPlugInManager *manager,
+                                                       const gchar       *uri);
 
 
 #endif /* __GIMP_PLUG_IN_MANAGER_FILE_H__ */