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optiongroup.cc

// Generated by gtkmmproc -- DO NOT MODIFY!

#include <glibmm/optiongroup.h>
#include <glibmm/private/optiongroup_p.h>

// -*- c++ -*-
/* $Id: optiongroup.cc 4 2005-05-13 20:47:18Z taybin $ */

/* Copyright (C) 2002 The gtkmm Development Team
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <glibmm/optionentry.h>
#include <glibmm/optioncontext.h>
#include <glibmm/utility.h>
//#include <glibmm/containers.h>
#include <glib/goption.h>

namespace Glib
{

namespace //anonymous
{

extern "C"
{

static gboolean g_callback_pre_parse(GOptionContext* context, GOptionGroup* /* group */, gpointer data, GError** /* TODO error */)
{
  OptionContext cppContext(context, false /* take_ownership */);
  //OptionGroup cppGroup(group, true /* take_copy */); //Maybe this should be option_group.
  
  OptionGroup* option_group = static_cast<OptionGroup*>(data);
  if(option_group)
    return option_group->on_pre_parse(cppContext, *option_group);
  else
    return false;
}

static gboolean g_callback_post_parse(GOptionContext* context, GOptionGroup* /* group */, gpointer data, GError** /* TODO error */)
{
  OptionContext cppContext(context, false /* take_ownership */);
  //OptionGroup cppGroup(group, true /* take_copy */); //Maybe this should be option_group.
  
  OptionGroup* option_group = static_cast<OptionGroup*>(data);
  if(option_group)
  {
    return option_group->on_post_parse(cppContext, *option_group);
  }
  else
    return false;
}

static void g_callback_error(GOptionContext* context, GOptionGroup* /* group */, gpointer data, GError** /* TODO error*/)
{
  OptionContext cppContext(context, false /* take_ownership */);
  //OptionGroup cppGroup(group); //Maybe this should be option_group.
  
  OptionGroup* option_group = static_cast<OptionGroup*>(data);
  if(option_group)
    return option_group->on_error(cppContext, *option_group);
}

} /* extern "C" */

} //anonymous namespace


OptionGroup::OptionGroup(const Glib::ustring& name, const Glib::ustring& description, const Glib::ustring& help_description)
: gobject_( g_option_group_new(name.c_str(), description.c_str(), help_description.c_str(), this, 0 /* destroy_func */) ),
  has_ownership_(true)
{
  //Connect callbacks, so that derived classes can override the virtual methods:
  g_option_group_set_parse_hooks(gobj(), &g_callback_pre_parse, &g_callback_post_parse);
  g_option_group_set_error_hook(gobj(), &g_callback_error);
}

00091 OptionGroup::OptionGroup(GOptionGroup* castitem)
: gobject_(castitem),
  has_ownership_(true)
{
  //Always takes ownership - never takes copy.
}


OptionGroup::~OptionGroup()
{
  //Free any C types that were allocated during add_entry():
  for(type_map_entries::iterator iter = map_entries_.begin(); iter != map_entries_.end(); ++iter)
  {
    CppOptionEntry& cpp_entry = iter->second;
    cpp_entry.release_c_arg();
  }
  
  if(has_ownership_)
  {
    g_option_group_free(gobj());
    gobject_ = 0;
  }
}

void OptionGroup::add_entry(const OptionEntry& entry)
{
  //It does not copy the entry, so it needs to live as long as the group.
  
  //g_option_group_add_entries takes an array, with the last item in the array having a null long_name.
  //Hopefully this will be properly documented eventually - see bug #
  
  //Create a temporary array, just so we can give the correct thing to g_option_group_add_entries:
  GOptionEntry array[2];
  array[0] = *(entry.gobj()); //Copy contents.
  GLIBMM_INITIALIZE_STRUCT(array[1], GOptionEntry);
   
  g_option_group_add_entries(gobj(), array);
}

void OptionGroup::add_entry(const OptionEntry& entry, bool& arg)
{
  add_entry_with_wrapper(entry, G_OPTION_ARG_NONE /* Actually a boolean on/off, depending on whether the argument name was given, without argument parameters. */, &arg);
}

void OptionGroup::add_entry(const OptionEntry& entry, int& arg)
{
  add_entry_with_wrapper(entry, G_OPTION_ARG_INT, &arg);
}

void OptionGroup::add_entry(const OptionEntry& entry, Glib::ustring& arg)
{
  add_entry_with_wrapper(entry, G_OPTION_ARG_STRING, &arg);
}

void OptionGroup::add_entry(const OptionEntry& entry, vecustrings& arg)
{
  add_entry_with_wrapper(entry, G_OPTION_ARG_STRING_ARRAY, &arg);
}

void OptionGroup::add_entry_filename(const OptionEntry& entry, std::string& arg)
{
  add_entry_with_wrapper(entry, G_OPTION_ARG_FILENAME, &arg);
}

void OptionGroup::add_entry_filename(const OptionEntry& entry, vecstrings& arg)
{
  add_entry_with_wrapper(entry, G_OPTION_ARG_FILENAME_ARRAY, &arg);
}
 
void OptionGroup::add_entry_with_wrapper(const OptionEntry& entry, GOptionArg arg_type, void* cpp_arg)
{
  const Glib::ustring name = entry.get_long_name();
  type_map_entries::iterator iterFind = map_entries_.find(name);
  if( iterFind == map_entries_.end() ) //If we have not added this entry already
  {  
    CppOptionEntry cppEntry;
    cppEntry.carg_type_ = arg_type;
    cppEntry.allocate_c_arg();
    
    cppEntry.cpparg_ = cpp_arg;
    
    //Remember the C++/C mapping so that we can use it later:
    map_entries_[name] = cppEntry;
  
    //Give the information to the C API:
    cppEntry.entry_ = new OptionEntry(entry); //g_option_group_add_entry() does not take its own copy, so we must keep the instance alive.*/
    cppEntry.entry_->gobj()->arg = arg_type;
    cppEntry.entry_->gobj()->arg_data = cppEntry.carg_;
    
    add_entry(*(cppEntry.entry_));
  }
}
  

bool OptionGroup::on_pre_parse(OptionContext& /* context */, OptionGroup& /* group */)
{
  
  return true;
}

bool OptionGroup::on_post_parse(OptionContext& /* context */, OptionGroup& /* group */)
{
  //Call this at the start of overrides.
  
  //TODO: Maybe put this in the C callback:
  
  //The C args have now been given values by GOption.
  //Convert C values to C++ values:
  
  for(type_map_entries::iterator iter = map_entries_.begin(); iter != map_entries_.end(); ++iter)
  {
    CppOptionEntry& cpp_entry = iter->second;
    cpp_entry.convert_c_to_cpp();
  }
  
  return true;
}

void OptionGroup::on_error(OptionContext& /* context */, OptionGroup& /* group */)
{
}


OptionGroup::CppOptionEntry::CppOptionEntry()
: carg_type_(G_OPTION_ARG_NONE), carg_(0), cpparg_(0), entry_(0)
{}
    
void OptionGroup::CppOptionEntry::allocate_c_arg()
{
  //Create an instance of the appropriate C type.
  //This will be destroyed in the OptionGroup destructor.
  switch(carg_type_)
  {
    case G_OPTION_ARG_STRING: //The char* will be for UTF8 strins.
    case G_OPTION_ARG_FILENAME: //The char* will be for strings in the current locale's encoding.
    {
      char** typed_arg = new char*;
      *typed_arg = 0; //The C code will allocate a char* and put it here, for us to g_free() later.
      carg_ = typed_arg;
      
      break;
    }
    case G_OPTION_ARG_INT:
    {
      int* typed_arg = new int;
      *typed_arg = 0;
      carg_ = typed_arg;
      
      break;
    }
    case G_OPTION_ARG_STRING_ARRAY:
    case G_OPTION_ARG_FILENAME_ARRAY:
    {
      char*** typed_arg = new char**;
      *typed_arg = 0;
      carg_ = typed_arg;
      
      break;
    }
    case G_OPTION_ARG_NONE: /* Actually a boolean. */
    {
      gboolean* typed_arg = new gboolean;
      *typed_arg = 0;
      carg_ = typed_arg;
      
      break;
    }
    default:
    {
      break;
    }
  }
}

void OptionGroup::CppOptionEntry::release_c_arg()
{
  //Delete the instances that we created in allocate_c_arg().
  //Notice that we delete the type that we created, but not the value to which it points.
  if(carg_)
  {
    switch(carg_type_)
    {
      case G_OPTION_ARG_STRING:
      case G_OPTION_ARG_FILENAME:
      {
        char** typed_arg = (char**)carg_;
        g_free(*typed_arg); //Free the char* string at type_arg, which was allocated by the C code.
        delete typed_arg; //Delete the char** that we allocated in allocate_c_arg;
        
        break;
      }
      case G_OPTION_ARG_INT:
      {
        int* typed_arg = (int*)carg_;
        delete typed_arg;

        break;
      }
      case G_OPTION_ARG_STRING_ARRAY:
      case G_OPTION_ARG_FILENAME_ARRAY:
      {
        delete (char**)carg_;
        break;
      }
      case G_OPTION_ARG_NONE: /* Actually a boolean. */
      {
        gboolean* typed_arg = (gboolean*)carg_;
        delete typed_arg;

        break;
      }
      default:
      {
      /* TODO:
      G_OPTION_ARG_CALLBACK,
*/
        break;
      }
    }
    
    carg_ = 0;
  }
  
  if(entry_)
    delete entry_;
}

void OptionGroup::CppOptionEntry::convert_c_to_cpp()
{
  switch(carg_type_)
  {
    case G_OPTION_ARG_STRING:
    {
      char** typed_arg = (char**)carg_;
      Glib::ustring* typed_cpp_arg = (Glib::ustring*)cpparg_;
      if(typed_arg && typed_cpp_arg)
      {
        char* pch = *typed_arg;
        (*typed_cpp_arg) = Glib::convert_const_gchar_ptr_to_ustring(pch);
       
        break;
      }
    }
    case G_OPTION_ARG_FILENAME:
    {
      char** typed_arg = (char**)carg_;
      std::string* typed_cpp_arg = (std::string*)cpparg_;
      if(typed_arg && typed_cpp_arg)
      {
        char* pch = *typed_arg;
        (*typed_cpp_arg) = Glib::convert_const_gchar_ptr_to_stdstring(pch);
       
        break;
      }
    }
    case G_OPTION_ARG_INT:
    {
      *((int*)cpparg_) = *((int*)carg_);
      break;
    }
        case G_OPTION_ARG_STRING_ARRAY:
    {
      char*** typed_arg = (char***)carg_;
      vecustrings* typed_cpp_arg = (vecustrings*)cpparg_;
      if(typed_arg && typed_cpp_arg)
      {
        typed_cpp_arg->clear();
        
        //The C array seems to be null-terminated.
        //Glib::StringArrayHandle array_handle(*typed_arg,  Glib::OWNERSHIP_NONE);
        
        //The SUN Forte compiler complains about this:
        // "optiongroup.cc", line 354: Error: Cannot assign Glib::ArrayHandle<Glib::ustring, 
        // Glib::Container_Helpers::TypeTraits<Glib::ustring>> to std::vector<Glib::ustring> without 
        // "std::vector<Glib::ustring>::operator=(const std::vector<Glib::ustring>&)";.
        //
        //(*typed_cpp_arg) = array_handle;
        //
        //And the Tru64 compiler does not even like us to instantiate the StringArrayHandle:
        //
        // cxx: Error: ../../glib/glibmm/containerhandle_shared.h, line 149: the operand
        //     of a pointer dynamic_cast must be a pointer to a complete class type
        //   return dynamic_cast<CppType>(Glib::wrap_auto(cobj, false /* take_copy */));
        
        //for(Glib::StringArrayHandle::iterator iter = array_handle.begin(); iter != array_handle.end(); ++iter)
        //{
        //  typed_cpp_arg->push_back(*iter);
        //}
        
        //So we do this:
        
        char** char_array_next = *typed_arg;
        while(char_array_next && *char_array_next)
        {
          typed_cpp_arg->push_back(*char_array_next);
          ++char_array_next;
        }
      }
      
      break;
    }
    case G_OPTION_ARG_FILENAME_ARRAY:
    {
      char*** typed_arg = (char***)carg_;
      vecustrings* typed_cpp_arg = (vecustrings*)cpparg_;
      if(typed_arg && typed_cpp_arg)
      { 
        typed_cpp_arg->clear();
              
        //See comments above about the SUN Forte and Tru64 compilers.
   
        char** char_array_next = *typed_arg;
        while(char_array_next && *char_array_next)
        {
          typed_cpp_arg->push_back(*char_array_next);
          ++char_array_next;
        }
      }
      
      break;
    }
    case G_OPTION_ARG_NONE: /* Actually a boolean. */
    {
      *((bool*)cpparg_) = *((gboolean*)carg_);
      break;
    }
    default:
    {
      /* TODO:
      G_OPTION_ARG_CALLBACK,
      */
      break;
    }
  }
} 

GOptionGroup* OptionGroup::gobj_give_ownership()
{
  has_ownership_ = false;
  return gobj();
}
  
} // namespace Glib


namespace
{
} // anonymous namespace


namespace Glib
{


00445 void OptionGroup::set_translation_domain(const Glib::ustring& domain)
{
  g_option_group_set_translation_domain(gobj(), domain.c_str());
}


} // namespace Glib



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