• Sam Hocevar's avatar
    · 95967459
    Sam Hocevar authored
      Beginning of Interface II
     ---------------------------
    
     * Plugins have completely disappeared, we now only use the new module API.
     * All intf and vout modules are now independant. So far, only the Gnome
       intf module and the SDL vout module have been ported. configure.in has
       been modified to reflect the changes (x11 and dummy aren't compiled by
       default anymore, while SDL and Gnome are).
    
      Note that this is _not_ Interface II, it's just a step forward. For
      instance, it lacks the whole message passing scheme.
    
      Things that should work:
    
     * Right-clicking on the SDL video output window brings the Gnome menu.
     * Pause, Play, Exit, About work from the menu or from the interface window.
     * The old SDL keys still work.
    
       Things that are broken or may be broken:
    
     * Xlib calls are not locked yet, which may lead to "Unexpected async reply"
       errors, and make the vlc segfault.
     * Sound only works for the first file.
     * The SDL vout_sdl.c file is absolutely ugly and kludgey.
     * The vlc immediately quits when no filename is given as an argument. Not
       a real bug, but still annoying.
     * The Gnome menu does not work in fullscreen mode.
    
       Things that will come soon, maybe tomorrow:
    
     * Complete navigation buttons (fast forward, slow, etc.).
     * File/Open menu to add files to the playlist.
     * Return of the X11 video output for those of us who do not have SDL.
     * Textmode interface for those of us who do not have Gnome.
     * aout and vout autospawn (maybe).
    95967459
intf_gnome.c 8.5 KB
/*****************************************************************************
 * intf_gnome.c: Gnome interface
 *****************************************************************************
 * Copyright (C) 1999, 2000 VideoLAN
 * $Id: intf_gnome.c,v 1.8 2001/02/11 01:15:10 sam Exp $
 *
 * Authors:
 *
 * 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.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
#include "defs.h"

#include <errno.h>                                                 /* ENOMEM */
#include <stdlib.h>                                                /* free() */
#include <string.h>                                            /* strerror() */
#include <stdio.h>

#include "glib.h"

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/keysym.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 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( 40 );
}

/*****************************************************************************
 * 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_window = 1;
    p_intf->p_sys->b_playlist = 0;

    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->pf_gtk_callback = NULL;
    p_intf->p_sys->pf_gdk_callback = NULL;

    return( 0 );
}

/*****************************************************************************
 * intf_Close: destroy interface window
 *****************************************************************************/
static void intf_Close( intf_thread_t *p_intf )
{
    /* 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[] = { };

    /* 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( );

    /* 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;

    /* store p_sys 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;

    /* 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 core vlc functions through the callback */
    p_intf->pf_manage( p_intf );

    if( p_intf->b_die )
    {
        /* prepare to die, young man */
        gtk_main_quit();
        return( FALSE );
    }

    return( TRUE );
}