- Written code for plugin management system, some code is missing (Matteo, please...)

- TODO Integrate this new plugin management system into the application

git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@697 3ecf2c5c-341e-0410-92b4-d18e462d057c

Makefile.am

@@ -156,6 +156,9 @@ src_backend_libbackend_la_SOURCES = \
 		src/backend/global_preferences.cc \
 		src/backend/history.cc \
 		src/backend/history_observer.cc \
+		src/backend/invalid_plugin_exception.cc \
+		src/backend/module.cc \
+		src/backend/plugin_manager.cc \
 		src/backend/policies_gatekeeper.cc \
 		src/backend/policy.cc \
 		src/backend/policy_manager.cc \
@@ -186,7 +189,10 @@ pkginclude_HEADERS += \
 		src/backend/global_preferences.hh \
 		src/backend/history.hh \
 		src/backend/history_observer.hh \
+		src/backend/invalid_plugin_exception.hh \
+		src/backend/module.hh \
 		src/backend/plugin.hh \
+		src/backend/plugin_manager.hh \
 		src/backend/policies_gatekeeper.hh \
 		src/backend/policy.hh \
 		src/backend/policy_manager.hh \

src/backend/invalid_plugin_exception.hh

@@ -0,0 +1,38 @@
+// src/backend/invalid_plugin_exception.hh - Copyright 2005, 2006, University
+//               of Padova, dept. of Pure and Applied
+//               Mathematics
+//
+// This file is part of SGPEMv2.
+//
+// This 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 2 of the License, or
+// (at your option) any later version.
+//
+// SGPEMv2 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 SGPEMv2; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+#ifndef INVALID_PLUGIN_EXCEPTION_HH
+#define INVALID_PLUGIN_EXCEPTION_HH 1
+
+#include "config.h"
+
+#include <stdexcept>
+
+namespace sgpem
+{
+  class InvalidPluginException : std::runtime_error
+  {
+  public:
+    InvalidPluginException(const std::string& what);
+  }; //~ class InvalidPluginException
+
+} //~ namespace sgpem
+
+#endif

src/backend/module.cc

@@ -0,0 +1,74 @@
+// src/backend/module.hh - Copyright 2005, 2006, University
+//               of Padova, dept. of Pure and Applied
+//               Mathematics
+//
+// This file is part of SGPEMv2.
+//
+// This 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 2 of the License, or
+// (at your option) any later version.
+//
+// SGPEMv2 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 SGPEMv2; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+#include "config.h"
+
+#include "module.hh"
+
+using namespace sgpem;
+
+Module::Module(const Glib::ustring& identifier) throw(InvalidPluginException) :
+  Glib::Module(identifier), _enabled(false), _id(identifier)
+{
+  //FIXME Don't know what to doh!!!
+  throw InvalidPluginException(Glib::Module::get_last_error());
+}
+  
+
+void 
+Module::set_enabled(bool enabled)
+{
+  //FIXME Don't know what to doh!!!
+  _enabled = enabled;
+}
+
+Glib::ustring 
+Module::get_name() const
+{
+  //FIXME Don't know what to doh!!!
+  return "doh!";
+}
+
+Glib::ustring 
+Module::get_author() const
+{
+  //FIXME Don't know what to doh!!!
+  return "doh! doh!";
+}
+
+Glib::ustring 
+Module::describe() const
+{
+  //FIXME Don't know what to doh!!!
+  return "homer insists in saying doh!";
+}
+
+float 
+Module::get_version() const
+{
+  //FIXME Don't know what to doh!!!
+  return -1.0f;
+}
+
+bool 
+Module::get_enabled() const
+{
+  return _enabled;
+}

src/backend/module.hh

@@ -0,0 +1,61 @@
+// src/backend/module.hh - Copyright 2005, 2006, University
+//               of Padova, dept. of Pure and Applied
+//               Mathematics
+//
+// This file is part of SGPEMv2.
+//
+// This 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 2 of the License, or
+// (at your option) any later version.
+//
+// SGPEMv2 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 SGPEMv2; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+#ifndef MODULE_HH
+#define MODULE_HH 1
+
+#include "config.h"
+
+#include "invalid_plugin_exception.hh"
+
+#include <glibmm/module.h>
+#include <glibmm/ustring.h>
+
+namespace sgpem
+{
+  class Module;
+  
+  class Module : public Glib::Module
+  {
+  public:
+    Module(const Glib::ustring& identifier) throw(InvalidPluginException);
+    
+    void set_enabled(bool enabled = true);
+    
+    Glib::ustring get_name() const;
+    
+    Glib::ustring get_author() const;
+    
+    Glib::ustring describe() const;
+    
+    float get_version() const;
+    
+    bool get_enabled() const;
+
+  private:
+    bool _enabled;
+    Glib::ustring _id;
+  
+  }; //~ class Module
+
+} //~ namespace sgpem
+
+#endif
+

src/backend/plugin_manager.cc

@@ -0,0 +1,89 @@
+// src/backend/plugin_manager.cc - Copyright 2005, 2006, University
+//               of Padova, dept. of Pure and Applied
+//               Mathematics
+//
+// This file is part of SGPEMv2.
+//
+// This 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 2 of the License, or
+// (at your option) any later version.
+//
+// SGPEMv2 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 SGPEMv2; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+#include "config.h"
+
+#include "plugin_manager.hh"
+#include "module.hh"
+#include "global_preferences.hh"
+
+#include "singleton.tcc"
+
+#include <glibmm/fileutils.h>
+#include <iostream>
+
+using namespace sgpem;
+using namespace std;
+
+template class Singleton<PluginManager>;
+
+
+std::vector<Module*> 
+PluginManager::get_module_list() const
+{
+  return _modules;
+}
+
+void 
+PluginManager::rescan_dirs()
+{  
+  Module* module = NULL;
+
+  for_each(_modules.begin(), _modules.end(), ptr_fun(operator delete));
+  _modules.clear();
+  
+  GlobalPreferences& prefs = GlobalPreferences::get_instance();
+  GlobalPreferences::dir_iterator it = prefs.modules_dir_begin();
+
+  while(it != prefs.modules_dir_end())
+  {
+    Glib::Dir dir(*it);
+
+    for(Glib::DirIterator dir_it = dir.begin(); dir_it != dir.end(); ++dir_it)
+    {
+      std::string module_path = Module::build_path(*it, *dir_it);
+      
+      try
+      {
+	module = new Module(module_path);
+
+	if(*module) 
+	  _modules.push_back(module);
+	else 
+	{ 
+	  std::cerr << Glib::Module::get_last_error() << std::endl;
+	  delete module;
+	}
+
+      }
+      catch(InvalidPluginException e)
+      {
+      }
+    }
+    
+    it++;
+  }
+}
+
+PluginManager::PluginManager()
+{
+  rescan_dirs();
+}
+

src/backend/plugin_manager.hh

@@ -0,0 +1,57 @@
+// src/backend/plugin_manager.hh - Copyright 2005, 2006, University
+//               of Padova, dept. of Pure and Applied
+//               Mathematics
+//
+// This file is part of SGPEMv2.
+//
+// This 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 2 of the License, or
+// (at your option) any later version.
+//
+// SGPEMv2 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 SGPEMv2; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+#ifndef PLUGIN_MANAGER_HH
+#define PLUGIN_MANAGER_HH 1
+
+namespace sgpem
+{
+  class Module;
+}
+
+#include "config.h"
+
+#include "singleton.hh"
+
+#include <vector>
+
+namespace sgpem
+{
+  class PluginManager;
+  
+  class PluginManager : public Singleton<PluginManager>
+  {
+    friend class Singleton<PluginManager>;
+  public:
+    std::vector<Module*> get_module_list() const;
+
+    void rescan_dirs();
+
+  private:
+    PluginManager();
+
+    std::vector<Module*> _modules; 
+
+  }; //~ class PluginManager
+
+} //~ namespace sgpem
+
+#endif
+