[glom/maemo5] Check for unsupported hosting modes.

[Murray Cumming <murrayc src gnome org>]

commit 3fd3dc77ccf0592628c55dd98df718c266501352
Author: Murray Cumming <murrayc murrayc com>
Date:   Sat Sep 5 14:32:17 2009 +0200

    Check for unsupported hosting modes.
    
    * glom/application.[h|cc]:
    Added check_document_hosting_mode_is_supported() to warn the user
    if the build cannot use the hosting mode in the file, and call it from
    on_document_load().
    * glom/libglom/document/bakery/document.cc: load(), load_from_data():
    Call set_is_new(false) so we can check for this in
    App/View::on_document_load(), to avoid complaining about an unused
    default hosting mode.

 ChangeLog                                |   13 +++++++
 glom/application.cc                      |   57 ++++++++++++++++++++++++++++++
 glom/application.h                       |    5 +++
 glom/libglom/document/bakery/document.cc |    2 +
 4 files changed, 77 insertions(+), 0 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 8cbbdf7..c8b9a30 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,18 @@
 2009-09-05  Murray Cumming  <murrayc murrayc com>
 
+	Check for unsupported hosting modes.
+
+	* glom/application.[h|cc]:
+	Added check_document_hosting_mode_is_supported() to warn the user 
+	if the build cannot use the hosting mode in the file, and call it from 
+	on_document_load().
+	* glom/libglom/document/bakery/document.cc: load(), load_from_data(): 
+	Call set_is_new(false) so we can check for this in 
+	App/View::on_document_load(), to avoid complaining about an unused 
+	default hosting mode.
+
+2009-09-05  Murray Cumming  <murrayc murrayc com>
+
 	* glom/application.cc: offer_new_or_existing(): In the client-only build, 
 	actually handle the enum for opening an existing file in client mode.
 
diff --git a/glom/application.cc b/glom/application.cc
index a703bed..692ce60 100644
--- a/glom/application.cc
+++ b/glom/application.cc
@@ -911,6 +911,59 @@ void App_Glom::init_create_document()
   type_base::init_create_document(); //Sets window title. Doesn't recreate doc.
 }
 
+bool App_Glom::check_document_hosting_mode_is_supported(Document* document)
+{
+  //Check that the file's hosting mode is supported by this build:
+  Glib::ustring error_message;
+  switch(document->get_hosting_mode())
+  {
+    case Document::HOSTING_MODE_POSTGRES_SELF:
+    {
+      #ifdef GLOM_ENABLE_CLIENT_ONLY
+      error_message = _("The file cannot be opened because this version of Glom does not support self-hosting of databases.");
+      break;
+      #endif //GLOM_ENABLE_CLIENT_ONLY
+
+      #ifndef GLOM_ENABLE_POSTGRESQL
+      error_message = _("The file cannot be opened because this version of Glom does not support PostgreSQL databases.");
+      break;
+      #endif //GLOM_ENABLE_POSTGRESQL
+
+      break;
+    }
+    case Document::HOSTING_MODE_POSTGRES_CENTRAL:
+    {
+      #ifndef GLOM_ENABLE_POSTGRESQL
+      error_message = _("The file cannot be opened because this version of Glom does not support PostgreSQL databases.");
+      #endif //GLOM_ENABLE_POSTGRESQL
+
+      break;
+    }
+    case Document::HOSTING_MODE_SQLITE:
+    {
+      #ifdef GLOM_ENABLE_SQLITE
+      error_message = _("The file cannot be opened because this version of Glom does not support SQLite databases.");
+      #endif //GLOM_ENABLE_SQLITE
+
+      break;
+    }
+    default:
+    {
+      //on_document_load() should have checked for this already, informing the user.
+      std::cerr << "Glom: setup_connection_pool_from_document(): Unhandled hosting mode: " << document->get_hosting_mode() << std::endl;
+     g_assert_not_reached();
+     break;
+    }
+  }
+
+  if(error_message.empty())
+    return true;
+
+  //Warn the user.
+  Frame_Glom::show_ok_dialog(_("File Uses Unsupported Database Backend"), error_message, *this, Gtk::MESSAGE_ERROR);
+  return false;
+}
+
 bool App_Glom::on_document_load()
 {
   //Link to the database described in the document.
@@ -919,6 +972,10 @@ bool App_Glom::on_document_load()
   Document* pDocument = static_cast<Document*>(get_document());
   if(!pDocument)
     return false;
+
+  std::cout << "debug: is_new(): " << pDocument->get_is_new() << std::endl;
+  if(!pDocument->get_is_new() && check_document_hosting_mode_is_supported(pDocument))
+    return false;
  
 #ifndef GLOM_ENABLE_CLIENT_ONLY
   //Connect signals:
diff --git a/glom/application.h b/glom/application.h
index e5b883c..635ea8d 100644
--- a/glom/application.h
+++ b/glom/application.h
@@ -106,6 +106,11 @@ private:
 
   void on_menu_help_contents();
 
+  /** Check that the file's hosting mode is supported by this build and 
+   * tell the user if necessary.
+   */
+  bool check_document_hosting_mode_is_supported(Document* document);
+
 #ifndef GLOM_ENABLE_CLIENT_ONLY
   void existing_or_new_new();
 
diff --git a/glom/libglom/document/bakery/document.cc b/glom/libglom/document/bakery/document.cc
index 9b80865..748a908 100644
--- a/glom/libglom/document/bakery/document.cc
+++ b/glom/libglom/document/bakery/document.cc
@@ -134,6 +134,7 @@ bool Document::load(int& failure_code)
     }
   }
 
+  set_is_new(false);
   return bTest;
 }
 
@@ -155,6 +156,7 @@ bool Document::load_from_data(const guchar* data, std::size_t length, int& failu
       m_pView->load_from_document();
   }
 
+  set_is_new(false);
   return bTest;
 }