/*****************************************************************************
* intf_gnome.c: Gnome interface
*****************************************************************************
* Copyright (C) 1999, 2000 VideoLAN
* $Id: intf_gnome.c,v 1.18 2001/02/20 23:30:15 sam Exp $
*
* Authors: Samuel Hocevar <sam@zoy.org>
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
#define MODULE_NAME gnome
#include "modules_inner.h"
/*****************************************************************************
* Preamble
*****************************************************************************/
#include "defs.h"
#include <errno.h> /* ENOMEM */
#include <stdlib.h> /* free() */
#include <string.h> /* strerror() */
#include <stdio.h>
#include <gnome.h>
#include "config.h"
#include "common.h"
#include "threads.h"
#include "mtime.h"
#include "tests.h"
#include "modules.h"
#include "stream_control.h"
#include "input_ext-intf.h"
#include "intf_msg.h"
#include "interface.h"
#include "gnome_sys.h"
#include "gnome_interface.h"
#include "gnome_support.h"
#include "main.h"
/*****************************************************************************
* Local prototypes.
*****************************************************************************/
static int intf_Probe ( probedata_t *p_data );
static int intf_Open ( intf_thread_t *p_intf );
static void intf_Close ( intf_thread_t *p_intf );
static void intf_Run ( intf_thread_t *p_intf );
static gint GnomeManage ( gpointer p_data );
/*****************************************************************************
* g_atexit: kludge to avoid the Gnome thread to segfault at exit
*****************************************************************************
* gtk_init() makes several calls to g_atexit() which calls atexit() to
* register tidying callbacks to be called at program exit. Since the Gnome
* plugin is likely to be unloaded at program exit, we have to export this
* symbol to intercept the g_atexit() calls. Talk about crude hack.
*****************************************************************************/
void g_atexit( GVoidFunc func )
{
intf_thread_t *p_intf = p_main->p_intf;
if( p_intf->p_sys->pf_gdk_callback == NULL )
{
p_intf->p_sys->pf_gdk_callback = func;
}
else if( p_intf->p_sys->pf_gtk_callback == NULL )
{
p_intf->p_sys->pf_gtk_callback = func;
}
/* else nothing, but we could do something here */
return;
}
/*****************************************************************************
* Functions exported as capabilities. They are declared as static so that
* we don't pollute the namespace too much.
*****************************************************************************/
void _M( intf_getfunctions )( function_list_t * p_function_list )
{
p_function_list->pf_probe = intf_Probe;
p_function_list->functions.intf.pf_open = intf_Open;
p_function_list->functions.intf.pf_close = intf_Close;
p_function_list->functions.intf.pf_run = intf_Run;
}
/*****************************************************************************
* intf_Probe: probe the interface and return a score
*****************************************************************************
* This function tries to initialize Gnome and returns a score to the
* plugin manager so that it can select the best plugin.
*****************************************************************************/
static int intf_Probe( probedata_t *p_data )
{
if( TestMethod( INTF_METHOD_VAR, "gnome" ) )
{
return( 999 );
}
return( 100 );
}
/*****************************************************************************
* intf_Open: initialize and create window
*****************************************************************************/
static int intf_Open( intf_thread_t *p_intf )
{
/* Allocate instance and initialize some members */
p_intf->p_sys = malloc( sizeof( intf_sys_t ) );
if( p_intf->p_sys == NULL )
{
intf_ErrMsg("error: %s", strerror(ENOMEM));
return( 1 );
}
/* Initialize Gnome thread */
p_intf->p_sys->b_popup_changed = 0;
p_intf->p_sys->b_window_changed = 0;
p_intf->p_sys->b_playlist_changed = 0;
p_intf->p_sys->b_scale_isfree = 1;
p_intf->p_sys->pf_gtk_callback = NULL;
p_intf->p_sys->pf_gdk_callback = NULL;
/* Initialize lock */
vlc_mutex_init( &p_intf->p_sys->change_lock );
return( 0 );
}
/*****************************************************************************
* intf_Close: destroy interface window
*****************************************************************************/
static void intf_Close( intf_thread_t *p_intf )
{
/* Destroy lock */
vlc_mutex_destroy( &p_intf->p_sys->change_lock );
/* Destroy structure */
free( p_intf->p_sys );
}
/*****************************************************************************
* intf_Run: Gnome thread
*****************************************************************************
* this part of the interface is in a separate thread so that we can call
* gtk_main() from within it without annoying the rest of the program.
* XXX: the approach may look kludgy, and probably is, but I could not find
* a better way to dynamically load a Gnome interface at runtime.
*****************************************************************************/
static void intf_Run( intf_thread_t *p_intf )
{
/* gnome_init needs to know the command line. We don't care, so we
* give it an empty one */
char *p_args[] = { "" };
/* The data types we are allowed to receive */
static GtkTargetEntry target_table[] =
{
{ "text/uri-list", 0, DROP_ACCEPT_TEXT_URI_LIST },
{ "text/plain", 0, DROP_ACCEPT_TEXT_PLAIN }
};
/* Initialize Gnome */
gnome_init( p_main->psz_arg0, VERSION, 1, p_args );
/* Create some useful widgets that will certainly be used */
p_intf->p_sys->p_window = create_intf_window( );
p_intf->p_sys->p_popup = create_intf_popup( );
/* Set the title of the main window */
gtk_window_set_title( GTK_WINDOW(p_intf->p_sys->p_window),
VOUT_TITLE " (Gnome interface)");
/* Accept file drops on the main window */
gtk_drag_dest_set( GTK_WIDGET( p_intf->p_sys->p_window ),
GTK_DEST_DEFAULT_ALL, target_table,
1, GDK_ACTION_COPY );
/* We don't create these ones yet because we perhaps won't need them */
p_intf->p_sys->p_about = NULL;
p_intf->p_sys->p_playlist = NULL;
p_intf->p_sys->p_modules = NULL;
p_intf->p_sys->p_fileopen = NULL;
/* Store p_intf to keep an eye on it */
gtk_object_set_data( GTK_OBJECT(p_intf->p_sys->p_window),
"p_intf", p_intf );
gtk_object_set_data( GTK_OBJECT(p_intf->p_sys->p_popup),
"p_intf", p_intf );
/* Show the control window */
gtk_widget_show( p_intf->p_sys->p_window );
/* Sleep to avoid using all CPU - since some interfaces needs to access
* keyboard events, a 100ms delay is a good compromise */
p_intf->p_sys->i_timeout = gtk_timeout_add( INTF_IDLE_SLEEP / 1000,
GnomeManage, p_intf );
/* Enter gnome mode */
gtk_main();
/* launch stored callbacks */
if( p_intf->p_sys->pf_gtk_callback != NULL )
{
p_intf->p_sys->pf_gtk_callback();
if( p_intf->p_sys->pf_gdk_callback != NULL )
{
p_intf->p_sys->pf_gdk_callback();
}
}
}
/* following functions are local */
/*****************************************************************************
* GnomeManage: manage main thread messages
*****************************************************************************
* In this function, called approx. 10 times a second, we check what the
* main program wanted to tell us.
*****************************************************************************/
static gint GnomeManage( gpointer p_data )
{
intf_thread_t *p_intf = (void *)p_data;
vlc_mutex_lock( &p_intf->p_sys->change_lock );
/* If the "display popup" flag has changed */
if( p_intf->b_menu_change )
{
gnome_popup_menu_do_popup( p_intf->p_sys->p_popup,
NULL, NULL, NULL, NULL );
p_intf->b_menu_change = 0;
}
/* Manage the slider */
if( p_intf->p_input != NULL && p_intf->p_sys->p_window != NULL
&& p_intf->p_sys->b_scale_isfree )
{
GtkWidget *p_scale;
GtkAdjustment *p_adj;
p_scale = GTK_WIDGET( gtk_object_get_data( GTK_OBJECT(
p_intf->p_sys->p_window ), "hscale" ) );
p_adj = gtk_range_get_adjustment ( GTK_RANGE( p_scale ) );
/* Update the value */
p_adj->value = ( 100. *
p_intf->p_input->stream.p_selected_area->i_tell ) /
p_intf->p_input->stream.p_selected_area->i_size;
/* Gtv does it this way. Why not. */
gtk_range_set_adjustment ( GTK_RANGE( p_scale ), p_adj );
gtk_range_slider_update ( GTK_RANGE( p_scale ) );
gtk_range_clear_background ( GTK_RANGE( p_scale ) );
gtk_range_draw_background ( GTK_RANGE( p_scale ) );
}
/* Manage core vlc functions through the callback */
p_intf->pf_manage( p_intf );
if( p_intf->b_die )
{
/* Make sure we won't be called again */
gtk_timeout_remove( p_intf->p_sys->i_timeout );
vlc_mutex_unlock( &p_intf->p_sys->change_lock );
/* Prepare to die, young Skywalker */
gtk_main_quit();
return( FALSE );
}
vlc_mutex_unlock( &p_intf->p_sys->change_lock );
return( TRUE );
}