/*
   Copyright (C) 2001-2006, William Joseph.
   All Rights Reserved.

   This file is part of GtkRadiant.

   GtkRadiant 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.

   GtkRadiant 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 GtkRadiant; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "menu.h"

#include <ctype.h>
#include <gtk/gtk.h>
#include <uilib/uilib.h>
#include <debugging/debugging.h>

#include "generic/callback.h"

#include "accelerator.h"
#include "closure.h"
#include "container.h"
#include "pointer.h"

void menu_add_item( ui::Menu menu, ui::MenuItem item ){
	menu.add(item);
}

ui::MenuItem menu_separator( ui::Menu menu ){
	auto menu_item = ui::MenuItem::from( gtk_menu_item_new() );
	menu.add(menu_item);
	gtk_widget_set_sensitive( menu_item , FALSE );
	menu_item.show();
	return menu_item;
}

ui::TearoffMenuItem menu_tearoff( ui::Menu menu ){
	auto menu_item = ui::TearoffMenuItem::from( gtk_tearoff_menu_item_new() );
	menu.add(menu_item);
// gtk_widget_set_sensitive(menu_item, FALSE); -- controls whether menu is detachable
	menu_item.show();
	return menu_item;
}

ui::MenuItem new_sub_menu_item_with_mnemonic( const char* mnemonic ){
	auto item = ui::MenuItem( mnemonic, true );
	item.show();

	auto sub_menu = ui::Menu(ui::New);
	gtk_menu_item_set_submenu( item, sub_menu );

	return item;
}

ui::Menu create_sub_menu_with_mnemonic( ui::MenuShell parent, const char* mnemonic ){
	auto item = new_sub_menu_item_with_mnemonic( mnemonic );
	parent.add(item);
	return ui::Menu::from( gtk_menu_item_get_submenu( item ) );
}

ui::Menu create_sub_menu_with_mnemonic( ui::MenuBar bar, const char* mnemonic ){
	return create_sub_menu_with_mnemonic( ui::MenuShell::from( bar._handle ), mnemonic );
}

ui::Menu create_sub_menu_with_mnemonic( ui::Menu parent, const char* mnemonic ){
	return create_sub_menu_with_mnemonic( ui::MenuShell::from( parent._handle ), mnemonic );
}

void activate_closure_callback( ui::Widget widget, gpointer data ){
	( *reinterpret_cast<Callback<void()>*>( data ) )( );
}

guint menu_item_connect_callback( ui::MenuItem item, const Callback<void()>& callback ){
#if 1
	return g_signal_connect_swapped( G_OBJECT( item ), "activate", G_CALLBACK( callback.getThunk() ), callback.getEnvironment() );
#else
	return g_signal_connect_closure( G_OBJECT( item ), "activate", create_cclosure( G_CALLBACK( activate_closure_callback ), callback ), FALSE );
#endif
}

guint check_menu_item_connect_callback( ui::CheckMenuItem item, const Callback<void()>& callback ){
#if 1
	guint handler = g_signal_connect_swapped( G_OBJECT( item ), "toggled", G_CALLBACK( callback.getThunk() ), callback.getEnvironment() );
#else
	guint handler = g_signal_connect_closure( G_OBJECT( item ), "toggled", create_cclosure( G_CALLBACK( activate_closure_callback ), callback ), TRUE );
#endif
	g_object_set_data( G_OBJECT( item ), "handler", gint_to_pointer( handler ) );
	return handler;
}

ui::MenuItem new_menu_item_with_mnemonic( const char *mnemonic, const Callback<void()>& callback ){
	auto item = ui::MenuItem( mnemonic, true );
	item.show();
	menu_item_connect_callback( item, callback );
	return item;
}

ui::MenuItem create_menu_item_with_mnemonic( ui::Menu menu, const char *mnemonic, const Callback<void()>& callback ){
	auto item = new_menu_item_with_mnemonic( mnemonic, callback );
	menu.add(item);
	return item;
}

ui::CheckMenuItem new_check_menu_item_with_mnemonic( const char* mnemonic, const Callback<void()>& callback ){
	auto item = ui::CheckMenuItem::from( gtk_check_menu_item_new_with_mnemonic( mnemonic ) );
	item.show();
	check_menu_item_connect_callback( item, callback );
	return item;
}

ui::CheckMenuItem create_check_menu_item_with_mnemonic( ui::Menu menu, const char* mnemonic, const Callback<void()>& callback ){
	auto item = new_check_menu_item_with_mnemonic( mnemonic, callback );
	menu.add(item);
	return item;
}

ui::RadioMenuItem new_radio_menu_item_with_mnemonic( GSList** group, const char* mnemonic, const Callback<void()>& callback ){
	auto item = ui::RadioMenuItem::from( gtk_radio_menu_item_new_with_mnemonic( *group, mnemonic ) );
	if ( *group == 0 ) {
		gtk_check_menu_item_set_active( GTK_CHECK_MENU_ITEM( item ), TRUE );
	}
	*group = gtk_radio_menu_item_get_group( item );
	item.show();
	check_menu_item_connect_callback( item, callback );
	return item;
}

ui::RadioMenuItem create_radio_menu_item_with_mnemonic( ui::Menu menu, GSList** group, const char* mnemonic, const Callback<void()>& callback ){
	auto item = new_radio_menu_item_with_mnemonic( group, mnemonic, callback );
	menu.add(item);
	return item;
}

void check_menu_item_set_active_no_signal( ui::CheckMenuItem item, gboolean active ){
	guint handler_id = gpointer_to_int( g_object_get_data( G_OBJECT( item ), "handler" ) );
	g_signal_handler_block( G_OBJECT( item ), handler_id );
	gtk_check_menu_item_set_active( item, active );
	g_signal_handler_unblock( G_OBJECT( item ), handler_id );
}



void radio_menu_item_set_active_no_signal( ui::RadioMenuItem item, gboolean active ){
	{
		for ( GSList* l = gtk_radio_menu_item_get_group( item ); l != 0; l = g_slist_next( l ) )
		{
			g_signal_handler_block( G_OBJECT( l->data ), gpointer_to_int( g_object_get_data( G_OBJECT( l->data ), "handler" ) ) );
		}
	}
	gtk_check_menu_item_set_active( GTK_CHECK_MENU_ITEM( item ), active );
	{
		for ( GSList* l = gtk_radio_menu_item_get_group( item ); l != 0; l = g_slist_next( l ) )
		{
			g_signal_handler_unblock( G_OBJECT( l->data ), gpointer_to_int( g_object_get_data( G_OBJECT( l->data ), "handler" ) ) );
		}
	}
}


void menu_item_set_accelerator( ui::MenuItem item, GClosure* closure ){
	GtkAccelLabel* accel_label = GTK_ACCEL_LABEL( gtk_bin_get_child( GTK_BIN( item ) ) );
	gtk_accel_label_set_accel_closure( accel_label, closure );
}

void accelerator_name( const Accelerator& accelerator, GString* gstring ){
	gboolean had_mod = FALSE;
	if ( accelerator.modifiers & GDK_SHIFT_MASK ) {
		g_string_append( gstring, "Shift" );
		had_mod = TRUE;
	}
	if ( accelerator.modifiers & GDK_CONTROL_MASK ) {
		if ( had_mod ) {
			g_string_append( gstring, "+" );
		}
		g_string_append( gstring, "Ctrl" );
		had_mod = TRUE;
	}
	if ( accelerator.modifiers & GDK_MOD1_MASK ) {
		if ( had_mod ) {
			g_string_append( gstring, "+" );
		}
		g_string_append( gstring, "Alt" );
		had_mod = TRUE;
	}

	if ( had_mod ) {
		g_string_append( gstring, "+" );
	}
	if ( accelerator.key < 0x80 || ( accelerator.key > 0x80 && accelerator.key <= 0xff ) ) {
		switch ( accelerator.key )
		{
		case ' ':
			g_string_append( gstring, "Space" );
			break;
		case '\\':
			g_string_append( gstring, "Backslash" );
			break;
		default:
			g_string_append_c( gstring, gchar( toupper( accelerator.key ) ) );
			break;
		}
	}
	else
	{
		gchar *tmp;

		tmp = gtk_accelerator_name( accelerator.key, (GdkModifierType)0 );
		if ( tmp[0] != 0 && tmp[1] == 0 ) {
			tmp[0] = gchar( toupper( tmp[0] ) );
		}
		g_string_append( gstring, tmp );
		g_free( tmp );
	}
}

void menu_item_add_accelerator( ui::MenuItem item, Accelerator accelerator ){
	if ( accelerator.key != 0 && gtk_accelerator_valid( accelerator.key, accelerator.modifiers )) {
		GClosure* closure = global_accel_group_find( accelerator );
		ASSERT_NOTNULL(closure);
		menu_item_set_accelerator( item, closure );
	}
}

ui::MenuItem create_menu_item_with_mnemonic( ui::Menu menu, const char* mnemonic, const Command& command ){
	auto item = create_menu_item_with_mnemonic( menu, mnemonic, command.m_callback );
	menu_item_add_accelerator( item, command.m_accelerator );
	return item;
}

void check_menu_item_set_active_callback(void *it, bool enabled ){
	auto item = ui::CheckMenuItem::from(it);
	check_menu_item_set_active_no_signal( item, enabled );
}

ui::CheckMenuItem create_check_menu_item_with_mnemonic( ui::Menu menu, const char* mnemonic, const Toggle& toggle ){
	auto item = create_check_menu_item_with_mnemonic( menu, mnemonic, toggle.m_command.m_callback );
	menu_item_add_accelerator( item, toggle.m_command.m_accelerator );
	toggle.m_exportCallback( PointerCaller<void, void(bool), check_menu_item_set_active_callback>( item._handle ) );
	return item;
}