projects/mozilla/vlcplugin.cpp

   1 /*****************************************************************************
   2  * vlcplugin.cpp: a VLC plugin for Mozilla
   3  *****************************************************************************
   4  * Copyright (C) 2002-2010 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *          Damien Fouilleul <damienf.fouilleul@laposte.net>
   9  *          Jean-Paul Saman <jpsaman@videolan.org>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  24  *****************************************************************************/
  25
  26 /*****************************************************************************
  27  * Preamble
  28  *****************************************************************************/
  29 #include "config.h"
  30
  31 #include "vlcplugin.h"
  32 #include "control/npolibvlc.h"
  33
  34 #include <ctype.h>
  35
  36 #if defined(XP_UNIX)
  37 #   include <pthread.h>
  38 #elif defined(XP_WIN)
  39     /* windows headers */
  40 #   include <winbase.h>
  41 #else
  42 #warning "locking not implemented for this platform"
  43 #endif
  44
  45 #include <stdio.h>
  46 #include <assert.h>
  47 #include <stdlib.h>
  48
  49 /*****************************************************************************
  50  * utilitiy functions
  51  *****************************************************************************/
  52 static void plugin_lock_init(plugin_lock_t *lock)
  53 {
  54     assert(lock);
  55
  56 #if defined(XP_UNIX)
  57     pthread_mutex_init(&lock->mutex, NULL);
  58 #elif defined(XP_WIN)
  59     InitializeCriticalSection(&lock->cs);
  60 #else
  61 #warning "locking not implemented in this platform"
  62 #endif
  63 }
  64
  65 static void plugin_lock_destroy(plugin_lock_t *lock)
  66 {
  67     assert(lock);
  68
  69 #if defined(XP_UNIX)
  70     pthread_mutex_destroy(&lock->mutex);
  71 #elif defined(XP_WIN)
  72     DeleteCriticalSection(&lock->cs);
  73 #else
  74 #warning "locking not implemented in this platform"
  75 #endif
  76 }
  77
  78 static void plugin_lock(plugin_lock_t *lock)
  79 {
  80     assert(lock);
  81
  82 #if defined(XP_UNIX)
  83     pthread_mutex_lock(&lock->mutex);
  84 #elif defined(XP_WIN)
  85     EnterCriticalSection(&lock->cs);
  86 #else
  87 #warning "locking not implemented in this platform"
  88 #endif
  89 }
  90
  91 static void plugin_unlock(plugin_lock_t *lock)
  92 {
  93     assert(lock);
  94
  95 #if defined(XP_UNIX)
  96     pthread_mutex_unlock(&lock->mutex);
  97 #elif defined(XP_WIN)
  98     LeaveCriticalSection(&lock->cs);
  99 #else
 100 #warning "locking not implemented in this platform"
 101 #endif
 102 }
 103
 104 /*****************************************************************************
 105  * VlcPlugin constructor and destructor
 106  *****************************************************************************/
 107 #if (((NP_VERSION_MAJOR << 8) + NP_VERSION_MINOR) < 20)
 108 VlcPlugin::VlcPlugin( NPP instance, uint16 mode ) :
 109 #else
 110 VlcPlugin::VlcPlugin( NPP instance, uint16_t mode ) :
 111 #endif
 112     i_npmode(mode),
 113     b_stream(0),
 114     b_autoplay(1),
 115     b_toolbar(0),
 116     psz_text(NULL),
 117     psz_target(NULL),
 118     playlist_index(-1),
 119     libvlc_instance(NULL),
 120     libvlc_media_list(NULL),
 121     libvlc_media_player(NULL),
 122     p_scriptClass(NULL),
 123     p_browser(instance),
 124     psz_baseURL(NULL)
 125 #if defined(XP_WIN)
 126     ,pf_wndproc(NULL)
 127 #endif
 128 #if defined(XP_UNIX)
 129     ,i_width((unsigned)-1)
 130     ,i_height((unsigned)-1)
 131     ,i_tb_width(0)
 132     ,i_tb_height(0)
 133     ,i_last_position(0)
 134     ,p_btnPlay(NULL)
 135     ,p_btnPause(NULL)
 136     ,p_btnStop(NULL)
 137     ,p_btnMute(NULL)
 138     ,p_btnUnmute(NULL)
 139     ,p_btnFullscreen(NULL)
 140     ,p_btnTime(NULL)
 141     ,p_timeline(NULL)
 142 #endif
 143 {
 144     memset(&npwindow, 0, sizeof(NPWindow));
 145 #if defined(XP_UNIX)
 146     memset(&npvideo, 0, sizeof(Window));
 147     memset(&npcontrol, 0, sizeof(Window));
 148 #endif
 149 }
 150
 151 static bool boolValue(const char *value) {
 152     return ( !strcmp(value, "1") ||
 153              !strcasecmp(value, "true") ||
 154              !strcasecmp(value, "yes") );
 155 }
 156
 157 bool EventObj::init()
 158 {
 159     plugin_lock_init(&lock);
 160     return true;
 161 }
 162
 163 EventObj::~EventObj()
 164 {
 165     plugin_lock_destroy(&lock);
 166 }
 167
 168 void EventObj::deliver(NPP browser)
 169 {
 170     NPVariant result;
 171     NPVariant params[1];
 172
 173     plugin_lock(&lock);
 174
 175     for( ev_l::iterator i=_elist.begin();i!=_elist.end();++i )
 176     {
 177         libvlc_event_type_t event = *i;
 178         STRINGZ_TO_NPVARIANT(libvlc_event_type_name(event), params[0]);
 179
 180         // Invalid events aren't supposed to be queued up.
 181         // if( !have_event(event) ) continue;
 182
 183         for( lr_l::iterator j=_llist.begin();j!=_llist.end();++j )
 184         {
 185             if (j->get(event))
 186             {
 187                 NPN_InvokeDefault(browser, j->listener(), params, 1, &result);
 188                 NPN_ReleaseVariantValue(&result);
 189             }
 190         }
 191     }
 192     _elist.clear();
 193
 194     plugin_unlock(&lock);
 195 }
 196
 197 void VlcPlugin::eventAsync(void *param)
 198 {
 199     VlcPlugin *plugin = (VlcPlugin*)param;
 200     plugin->events.deliver(plugin->getBrowser());
 201 }
 202
 203 void EventObj::callback(const libvlc_event_t* event)
 204 {
 205     plugin_lock(&lock);
 206
 207     if( have_event(event->type) )
 208         _elist.push_back(event->type);
 209
 210     plugin_unlock(&lock);
 211 }
 212
 213 void VlcPlugin::event_callback(const libvlc_event_t* event, void *param)
 214 {
 215     VlcPlugin *plugin = (VlcPlugin*)param;
 216 #if defined(XP_UNIX)
 217     plugin->events.callback(event);
 218     NPN_PluginThreadAsyncCall(plugin->getBrowser(), eventAsync, plugin);
 219 #else
 220 #warning NPN_PluginThreadAsyncCall not implemented yet.
 221     printf("No NPN_PluginThreadAsyncCall(), doing nothing.");
 222 #endif
 223 }
 224
 225 inline EventObj::event_t EventObj::find_event(const char *s) const
 226 {
 227     event_t i;
 228     for(i=0;i<maxbit();++i)
 229         if(!strcmp(s,libvlc_event_type_name(i)))
 230             break;
 231     return i;
 232 }
 233
 234 bool EventObj::insert(const NPString &s, NPObject *l, bool b)
 235 {
 236     event_t e = find_event(s.UTF8Characters);
 237     if( e>=maxbit() )
 238         return false;
 239
 240     if( !have_event(e) && !ask_for_event(e) )
 241         return false;
 242
 243     lr_l::iterator i;
 244     for(i=_llist.begin();i!=_llist.end();++i)
 245         if(i->listener()==l && i->bubble()==b)
 246             break;
 247
 248     if( i == _llist.end() ) {
 249         _llist.push_back(Listener(e,l,b));
 250     } else {
 251         if( i->get(e) )
 252             return false;
 253         i->get(e);
 254     }
 255     return true;
 256 }
 257
 258
 259 bool EventObj::remove(const NPString &s, NPObject *l, bool b)
 260 {
 261     event_t e = find_event(s.UTF8Characters);
 262     if( e>=maxbit() || !get(e) )
 263         return false;
 264
 265     bool any=false;
 266     for(lr_l::iterator i=_llist.begin();i!=_llist.end();)
 267     {
 268         if(i->listener()!=l || i->bubble()!=b)
 269             any|=i->get(e);
 270         else
 271         {
 272             i->reset(e);
 273             if(i->empty())
 274             {
 275                 i=_llist.erase(i);
 276                 continue;
 277             }
 278         }
 279         ++i;
 280     }
 281     if(!any)
 282         unask_for_event(e);
 283
 284     return true;
 285 }
 286
 287
 288 void EventObj::hook_manager(libvlc_event_manager_t *em,
 289                             libvlc_callback_t cb, void *udata)
 290 {
 291     _em = em; _cb = cb; _ud = udata;
 292     if( !_em )
 293         return;
 294     for(size_t i=0;i<maxbit();++i)
 295         if(get(i))
 296             libvlc_event_attach(_em, i, _cb, _ud);
 297 }
 298
 299 void EventObj::unhook_manager()
 300 {
 301     if( !_em )
 302     return;
 303     for(size_t i=0;i<maxbit();++i)
 304         if(get(i))
 305             libvlc_event_detach(_em, i, _cb, _ud);
 306 }
 307
 308
 309 bool EventObj::ask_for_event(event_t e)
 310 {
 311     return _em?0==libvlc_event_attach(_em, e, _cb, _ud):false;
 312 }
 313
 314
 315 void EventObj::unask_for_event(event_t e)
 316 {
 317     if(_em) libvlc_event_detach(_em, e, _cb, _ud);
 318 }
 319
 320
 321 NPError VlcPlugin::init(int argc, char* const argn[], char* const argv[])
 322 {
 323     /* prepare VLC command line */
 324     const char *ppsz_argv[32];
 325     int ppsz_argc = 0;
 326
 327 #ifndef NDEBUG
 328     ppsz_argv[ppsz_argc++] = "--no-plugins-cache";
 329 #endif
 330
 331     /* locate VLC module path */
 332 #ifdef XP_MACOSX
 333     ppsz_argv[ppsz_argc++] = "--plugin-path=/Library/Internet\\ Plug-Ins/VLC\\ Plugin.plugin/Contents/MacOS/plugins";
 334     ppsz_argv[ppsz_argc++] = "--vout=minimal_macosx";
 335 #elif defined(XP_WIN)
 336     HKEY h_key;
 337     DWORD i_type, i_data = MAX_PATH + 1;
 338     char p_data[MAX_PATH + 1];
 339     if( RegOpenKeyEx( HKEY_LOCAL_MACHINE, "Software\\VideoLAN\\VLC",
 340                       0, KEY_READ, &h_key ) == ERROR_SUCCESS )
 341     {
 342          if( RegQueryValueEx( h_key, "InstallDir", 0, &i_type,
 343                               (LPBYTE)p_data, &i_data ) == ERROR_SUCCESS )
 344          {
 345              if( i_type == REG_SZ )
 346              {
 347                  strcat( p_data, "\\plugins" );
 348                  ppsz_argv[ppsz_argc++] = "--plugin-path";
 349                  ppsz_argv[ppsz_argc++] = p_data;
 350              }
 351          }
 352          RegCloseKey( h_key );
 353     }
 354     ppsz_argv[ppsz_argc++] = "--no-one-instance";
 355
 356 #endif /* XP_MACOSX */
 357
 358     /* common settings */
 359     ppsz_argv[ppsz_argc++] = "-vv";
 360     ppsz_argv[ppsz_argc++] = "--no-stats";
 361     ppsz_argv[ppsz_argc++] = "--no-media-library";
 362     ppsz_argv[ppsz_argc++] = "--intf=dummy";
 363     ppsz_argv[ppsz_argc++] = "--no-video-title-show";
 364     ppsz_argv[ppsz_argc++] = "--no-xlib";
 365
 366     const char *progid = NULL;
 367
 368     /* parse plugin arguments */
 369     for( int i = 0; (i < argc) && (ppsz_argc < 32); i++ )
 370     {
 371        /* fprintf(stderr, "argn=%s, argv=%s\n", argn[i], argv[i]); */
 372
 373         if( !strcmp( argn[i], "target" )
 374          || !strcmp( argn[i], "mrl")
 375          || !strcmp( argn[i], "filename")
 376          || !strcmp( argn[i], "src") )
 377         {
 378             psz_target = argv[i];
 379         }
 380         else if( !strcmp( argn[i], "text" ) )
 381         {
 382             free( psz_text );
 383             psz_text = strdup( argv[i] );
 384         }
 385         else if( !strcmp( argn[i], "autoplay")
 386               || !strcmp( argn[i], "autostart") )
 387         {
 388             b_autoplay = boolValue(argv[i]);
 389         }
 390         else if( !strcmp( argn[i], "fullscreen" ) )
 391         {
 392             if( boolValue(argv[i]) )
 393             {
 394                 ppsz_argv[ppsz_argc++] = "--fullscreen";
 395             }
 396             else
 397             {
 398                 ppsz_argv[ppsz_argc++] = "--no-fullscreen";
 399             }
 400         }
 401         else if( !strcmp( argn[i], "mute" ) )
 402         {
 403             if( boolValue(argv[i]) )
 404             {
 405                 ppsz_argv[ppsz_argc++] = "--volume=0";
 406             }
 407         }
 408         else if( !strcmp( argn[i], "loop")
 409               || !strcmp( argn[i], "autoloop") )
 410         {
 411             if( boolValue(argv[i]) )
 412             {
 413                 ppsz_argv[ppsz_argc++] = "--loop";
 414             }
 415             else
 416             {
 417                 ppsz_argv[ppsz_argc++] = "--no-loop";
 418             }
 419         }
 420         else if( !strcmp( argn[i], "version")
 421               || !strcmp( argn[i], "progid") )
 422         {
 423             progid = argv[i];
 424         }
 425         else if( !strcmp( argn[i], "toolbar" ) )
 426         {
 427 /* FIXME: Remove this when toolbar functionality has been implemented on
 428  * MacOS X and Win32 for Firefox/Mozilla/Safari. */
 429 #ifdef XP_UNIX
 430             b_toolbar = boolValue(argv[i]);
 431 #endif
 432         }
 433     }
 434
 435     libvlc_instance = libvlc_new(ppsz_argc, ppsz_argv);
 436     if( !libvlc_instance )
 437         return NPERR_GENERIC_ERROR;
 438     libvlc_media_list = libvlc_media_list_new(libvlc_instance);
 439
 440     /*
 441     ** fetch plugin base URL, which is the URL of the page containing the plugin
 442     ** this URL is used for making absolute URL from relative URL that may be
 443     ** passed as an MRL argument
 444     */
 445     NPObject *plugin = NULL;
 446
 447     if( NPERR_NO_ERROR == NPN_GetValue(p_browser, NPNVWindowNPObject, &plugin) )
 448     {
 449         /*
 450         ** is there a better way to get that info ?
 451         */
 452         static const char docLocHref[] = "document.location.href";
 453         NPString script;
 454         NPVariant result;
 455
 456         script.UTF8Characters = docLocHref;
 457         script.UTF8Length = sizeof(docLocHref)-1;
 458
 459         if( NPN_Evaluate(p_browser, plugin, &script, &result) )
 460         {
 461             if( NPVARIANT_IS_STRING(result) )
 462             {
 463                 NPString &location = NPVARIANT_TO_STRING(result);
 464
 465                 psz_baseURL = (char *) malloc(location.UTF8Length+1);
 466                 if( psz_baseURL )
 467                 {
 468                     strncpy(psz_baseURL, location.UTF8Characters, location.UTF8Length);
 469                     psz_baseURL[location.UTF8Length] = '\0';
 470                 }
 471             }
 472             NPN_ReleaseVariantValue(&result);
 473         }
 474         NPN_ReleaseObject(plugin);
 475     }
 476
 477     if( psz_target )
 478     {
 479         // get absolute URL from src
 480         char *psz_absurl = getAbsoluteURL(psz_target);
 481         psz_target = psz_absurl ? psz_absurl : strdup(psz_target);
 482     }
 483
 484     /* assign plugin script root class */
 485     /* new APIs */
 486     p_scriptClass = RuntimeNPClass<LibvlcRootNPObject>::getClass();
 487
 488     if( !events.init() )
 489         return NPERR_GENERIC_ERROR;
 490
 491     return NPERR_NO_ERROR;
 492 }
 493
 494 VlcPlugin::~VlcPlugin()
 495 {
 496     free(psz_baseURL);
 497     free(psz_target);
 498     free(psz_text);
 499
 500     if( libvlc_media_player )
 501     {
 502         if( playlist_isplaying() )
 503             playlist_stop();
 504         events.unhook_manager();
 505         libvlc_media_player_release( libvlc_media_player );
 506     }
 507     if( libvlc_media_list )
 508         libvlc_media_list_release( libvlc_media_list );
 509     if( libvlc_instance )
 510         libvlc_release(libvlc_instance);
 511 }
 512
 513 /*****************************************************************************
 514  * VlcPlugin playlist replacement methods
 515  *****************************************************************************/
 516 void VlcPlugin::set_player_window()
 517 {
 518 #ifdef XP_UNIX
 519     libvlc_media_player_set_xwindow(libvlc_media_player,
 520                                     (uint32_t)getVideoWindow());
 521 #endif
 522 #ifdef XP_MACOSX
 523     // XXX FIXME insert appropriate call here
 524 #endif
 525 #ifdef XP_WIN
 526     libvlc_media_player_set_hwnd(libvlc_media_player,
 527                                  getWindow().window);
 528 #endif
 529 }
 530
 531 int VlcPlugin::playlist_add( const char *mrl )
 532 {
 533     int item = -1;
 534     libvlc_media_t *p_m = libvlc_media_new_location(libvlc_instance,mrl);
 535     if( !p_m )
 536         return -1;
 537     assert( libvlc_media_list );
 538     libvlc_media_list_lock(libvlc_media_list);
 539     if( !libvlc_media_list_add_media(libvlc_media_list,p_m) )
 540         item = libvlc_media_list_count(libvlc_media_list)-1;
 541     libvlc_media_list_unlock(libvlc_media_list);
 542
 543     libvlc_media_release(p_m);
 544
 545     return item;
 546 }
 547
 548 int VlcPlugin::playlist_add_extended_untrusted( const char *mrl, const char *name,
 549                     int optc, const char **optv )
 550 {
 551     libvlc_media_t *p_m;
 552     int item = -1;
 553
 554     assert( libvlc_media_list );
 555
 556     p_m = libvlc_media_new_location(libvlc_instance, mrl);
 557     if( !p_m )
 558         return -1;
 559
 560     for( int i = 0; i < optc; ++i )
 561         libvlc_media_add_option_flag(p_m, optv[i], libvlc_media_option_unique);
 562
 563     libvlc_media_list_lock(libvlc_media_list);
 564     if( !libvlc_media_list_add_media(libvlc_media_list,p_m) )
 565         item = libvlc_media_list_count(libvlc_media_list)-1;
 566     libvlc_media_list_unlock(libvlc_media_list);
 567     libvlc_media_release(p_m);
 568
 569     return item;
 570 }
 571
 572 bool VlcPlugin::playlist_select( int idx )
 573 {
 574     libvlc_media_t *p_m = NULL;
 575
 576     assert( libvlc_media_list );
 577
 578     libvlc_media_list_lock(libvlc_media_list);
 579
 580     int count = libvlc_media_list_count(libvlc_media_list);
 581     if( idx<0||idx>=count )
 582         goto bad_unlock;
 583
 584     playlist_index = idx;
 585
 586     p_m = libvlc_media_list_item_at_index(libvlc_media_list,playlist_index);
 587     libvlc_media_list_unlock(libvlc_media_list);
 588
 589     if( !p_m )
 590         return false;
 591
 592     if( libvlc_media_player )
 593     {
 594         if( playlist_isplaying() )
 595             playlist_stop();
 596         events.unhook_manager();
 597         libvlc_media_player_release( libvlc_media_player );
 598         libvlc_media_player = NULL;
 599     }
 600
 601     libvlc_media_player = libvlc_media_player_new_from_media(p_m);
 602     if( libvlc_media_player )
 603     {
 604         set_player_window();
 605         events.hook_manager(
 606                       libvlc_media_player_event_manager(libvlc_media_player),
 607                       event_callback, this);
 608     }
 609
 610     libvlc_media_release( p_m );
 611     return true;
 612
 613 bad_unlock:
 614     libvlc_media_list_unlock(libvlc_media_list);
 615     return false;
 616 }
 617
 618 int VlcPlugin::playlist_delete_item( int idx )
 619 {
 620     if( !libvlc_media_list )
 621         return -1;
 622     libvlc_media_list_lock(libvlc_media_list);
 623     int ret = libvlc_media_list_remove_index(libvlc_media_list,idx);
 624     libvlc_media_list_unlock(libvlc_media_list);
 625     return ret;
 626 }
 627
 628 void VlcPlugin::playlist_clear()
 629 {
 630     if( libvlc_media_list )
 631         libvlc_media_list_release(libvlc_media_list);
 632     libvlc_media_list = libvlc_media_list_new(getVLC());
 633 }
 634
 635 int VlcPlugin::playlist_count()
 636 {
 637     int items_count = 0;
 638     if( !libvlc_media_list )
 639         return items_count;
 640     libvlc_media_list_lock(libvlc_media_list);
 641     items_count = libvlc_media_list_count(libvlc_media_list);
 642     libvlc_media_list_unlock(libvlc_media_list);
 643     return items_count;
 644 }
 645
 646 void VlcPlugin::toggle_fullscreen()
 647 {
 648     if( playlist_isplaying() )
 649         libvlc_toggle_fullscreen(libvlc_media_player);
 650 }
 651
 652 void VlcPlugin::set_fullscreen( int yes )
 653 {
 654     if( playlist_isplaying() )
 655         libvlc_set_fullscreen(libvlc_media_player,yes);
 656 }
 657
 658 int  VlcPlugin::get_fullscreen()
 659 {
 660     int r = 0;
 661     if( playlist_isplaying() )
 662         r = libvlc_get_fullscreen(libvlc_media_player);
 663     return r;
 664 }
 665
 666 bool  VlcPlugin::player_has_vout()
 667 {
 668     bool r = false;
 669     if( playlist_isplaying() )
 670         r = libvlc_media_player_has_vout(libvlc_media_player);
 671     return r;
 672 }
 673
 674 /*****************************************************************************
 675  * VlcPlugin methods
 676  *****************************************************************************/
 677
 678 char *VlcPlugin::getAbsoluteURL(const char *url)
 679 {
 680     if( NULL != url )
 681     {
 682         // check whether URL is already absolute
 683         const char *end=strchr(url, ':');
 684         if( (NULL != end) && (end != url) )
 685         {
 686             // validate protocol header
 687             const char *start = url;
 688             char c = *start;
 689             if( isalpha(c) )
 690             {
 691                 ++start;
 692                 while( start != end )
 693                 {
 694                     c  = *start;
 695                     if( ! (isalnum(c)
 696                        || ('-' == c)
 697                        || ('+' == c)
 698                        || ('.' == c)
 699                        || ('/' == c)) ) /* VLC uses / to allow user to specify a demuxer */
 700                         // not valid protocol header, assume relative URL
 701                         goto relativeurl;
 702                     ++start;
 703                 }
 704                 /* we have a protocol header, therefore URL is absolute */
 705                 return strdup(url);
 706             }
 707             // not a valid protocol header, assume relative URL
 708         }
 709
 710 relativeurl:
 711
 712         if( psz_baseURL )
 713         {
 714             size_t baseLen = strlen(psz_baseURL);
 715             char *href = (char *) malloc(baseLen+strlen(url)+1);
 716             if( href )
 717             {
 718                 /* prepend base URL */
 719                 memcpy(href, psz_baseURL, baseLen+1);
 720
 721                 /*
 722                 ** relative url could be empty,
 723                 ** in which case return base URL
 724                 */
 725                 if( '\0' == *url )
 726                     return href;
 727
 728                 /*
 729                 ** locate pathname part of base URL
 730                 */
 731
 732                 /* skip over protocol part  */
 733                 char *pathstart = strchr(href, ':');
 734                 char *pathend = href+baseLen;
 735                 if( pathstart )
 736                 {
 737                     if( '/' == *(++pathstart) )
 738                     {
 739                         if( '/' == *(++pathstart) )
 740                         {
 741                             ++pathstart;
 742                         }
 743                     }
 744                     /* skip over host part */
 745                     pathstart = strchr(pathstart, '/');
 746                     if( ! pathstart )
 747                     {
 748                         // no path, add a / past end of url (over '\0')
 749                         pathstart = pathend;
 750                         *pathstart = '/';
 751                     }
 752                 }
 753                 else
 754                 {
 755                     /* baseURL is just a UNIX path */
 756                     if( '/' != *href )
 757                     {
 758                         /* baseURL is not an absolute path */
 759                         free(href);
 760                         return NULL;
 761                     }
 762                     pathstart = href;
 763                 }
 764
 765                 /* relative URL made of an absolute path ? */
 766                 if( '/' == *url )
 767                 {
 768                     /* replace path completely */
 769                     strcpy(pathstart, url);
 770                     return href;
 771                 }
 772
 773                 /* find last path component and replace it */
 774                 while( '/' != *pathend)
 775                     --pathend;
 776
 777                 /*
 778                 ** if relative url path starts with one or more '../',
 779                 ** factor them out of href so that we return a
 780                 ** normalized URL
 781                 */
 782                 while( pathend != pathstart )
 783                 {
 784                     const char *p = url;
 785                     if( '.' != *p )
 786                         break;
 787                     ++p;
 788                     if( '\0' == *p  )
 789                     {
 790                         /* relative url is just '.' */
 791                         url = p;
 792                         break;
 793                     }
 794                     if( '/' == *p  )
 795                     {
 796                         /* relative url starts with './' */
 797                         url = ++p;
 798                         continue;
 799                     }
 800                     if( '.' != *p )
 801                         break;
 802                     ++p;
 803                     if( '\0' == *p )
 804                     {
 805                         /* relative url is '..' */
 806                     }
 807                     else
 808                     {
 809                         if( '/' != *p )
 810                             break;
 811                         /* relative url starts with '../' */
 812                         ++p;
 813                     }
 814                     url = p;
 815                     do
 816                     {
 817                         --pathend;
 818                     }
 819                     while( '/' != *pathend );
 820                 }
 821                 /* skip over '/' separator */
 822                 ++pathend;
 823                 /* concatenate remaining base URL and relative URL */
 824                 strcpy(pathend, url);
 825             }
 826             return href;
 827         }
 828     }
 829     return NULL;
 830 }
 831
 832 #if defined(XP_UNIX)
 833 int  VlcPlugin::setSize(unsigned width, unsigned height)
 834 {
 835     int diff = (width != i_width) || (height != i_height);
 836
 837     i_width = width;
 838     i_height = height;
 839
 840     /* return size */
 841     return diff;
 842 }
 843
 844 #define BTN_SPACE ((unsigned int)4)
 845 void VlcPlugin::showToolbar()
 846 {
 847     const NPWindow& window = getWindow();
 848     Window control = getControlWindow();
 849     Window video = getVideoWindow();
 850     Display *p_display = ((NPSetWindowCallbackStruct *)window.ws_info)->display;
 851     unsigned int i_height = 0, i_width = BTN_SPACE;
 852
 853     /* load icons */
 854     if( !p_btnPlay )
 855         XpmReadFileToImage( p_display, DATA_PATH "/mozilla/play.xpm",
 856                             &p_btnPlay, NULL, NULL);
 857     if( p_btnPlay )
 858     {
 859         i_height = __MAX( i_height, p_btnPlay->height );
 860     }
 861     if( !p_btnPause )
 862         XpmReadFileToImage( p_display, DATA_PATH "/mozilla/pause.xpm",
 863                             &p_btnPause, NULL, NULL);
 864     if( p_btnPause )
 865     {
 866         i_height = __MAX( i_height, p_btnPause->height );
 867     }
 868     i_width += __MAX( p_btnPause->width, p_btnPlay->width );
 869
 870     if( !p_btnStop )
 871         XpmReadFileToImage( p_display, DATA_PATH "/mozilla/stop.xpm",
 872                             &p_btnStop, NULL, NULL );
 873     if( p_btnStop )
 874     {
 875         i_height = __MAX( i_height, p_btnStop->height );
 876         i_width += BTN_SPACE + p_btnStop->width;
 877     }
 878     if( !p_timeline )
 879         XpmReadFileToImage( p_display, DATA_PATH "/mozilla/time_line.xpm",
 880                             &p_timeline, NULL, NULL);
 881     if( p_timeline )
 882     {
 883         i_height = __MAX( i_height, p_timeline->height );
 884         i_width += BTN_SPACE + p_timeline->width;
 885     }
 886     if( !p_btnTime )
 887         XpmReadFileToImage( p_display, DATA_PATH "/mozilla/time_icon.xpm",
 888                             &p_btnTime, NULL, NULL);
 889     if( p_btnTime )
 890     {
 891         i_height = __MAX( i_height, p_btnTime->height );
 892         i_width += BTN_SPACE + p_btnTime->width;
 893     }
 894     if( !p_btnFullscreen )
 895         XpmReadFileToImage( p_display, DATA_PATH "/mozilla/fullscreen.xpm",
 896                             &p_btnFullscreen, NULL, NULL);
 897     if( p_btnFullscreen )
 898     {
 899         i_height = __MAX( i_height, p_btnFullscreen->height );
 900         i_width += BTN_SPACE + p_btnFullscreen->width;
 901     }
 902     if( !p_btnMute )
 903         XpmReadFileToImage( p_display, DATA_PATH "/mozilla/volume_max.xpm",
 904                             &p_btnMute, NULL, NULL);
 905     if( p_btnMute )
 906     {
 907         i_height = __MAX( i_height, p_btnMute->height );
 908     }
 909     if( !p_btnUnmute )
 910         XpmReadFileToImage( p_display, DATA_PATH "/mozilla/volume_mute.xpm",
 911                             &p_btnUnmute, NULL, NULL);
 912     if( p_btnUnmute )
 913     {
 914         i_height = __MAX( i_height, p_btnUnmute->height );
 915     }
 916     i_width += BTN_SPACE + __MAX( p_btnUnmute->width, p_btnMute->width );
 917
 918     setToolbarSize( i_width, i_height );
 919
 920     if( !p_btnPlay || !p_btnPause || !p_btnStop || !p_timeline ||
 921         !p_btnTime || !p_btnFullscreen || !p_btnMute || !p_btnUnmute )
 922         fprintf(stderr, "Error: some button images not found in %s\n", DATA_PATH );
 923
 924     /* reset panels position and size */
 925     /* XXX  use i_width */
 926     XResizeWindow( p_display, video, window.width, window.height - i_height);
 927     XMoveWindow( p_display, control, 0, window.height - i_height );
 928     XResizeWindow( p_display, control, window.width, i_height -1);
 929
 930     b_toolbar = 1; /* says toolbar is now shown */
 931     redrawToolbar();
 932 }
 933
 934 void VlcPlugin::hideToolbar()
 935 {
 936     const NPWindow& window = getWindow();
 937     Display *p_display = ((NPSetWindowCallbackStruct *)window.ws_info)->display;
 938     Window control = getControlWindow();
 939     Window video = getVideoWindow();
 940
 941     i_tb_width = i_tb_height = 0;
 942
 943     if( p_btnPlay )  XDestroyImage( p_btnPlay );
 944     if( p_btnPause ) XDestroyImage( p_btnPause );
 945     if( p_btnStop )  XDestroyImage( p_btnStop );
 946     if( p_timeline ) XDestroyImage( p_timeline );
 947     if( p_btnTime )  XDestroyImage( p_btnTime );
 948     if( p_btnFullscreen ) XDestroyImage( p_btnFullscreen );
 949     if( p_btnMute )  XDestroyImage( p_btnMute );
 950     if( p_btnUnmute ) XDestroyImage( p_btnUnmute );
 951
 952     p_btnPlay = NULL;
 953     p_btnPause = NULL;
 954     p_btnStop = NULL;
 955     p_timeline = NULL;
 956     p_btnTime = NULL;
 957     p_btnFullscreen = NULL;
 958     p_btnMute = NULL;
 959     p_btnUnmute = NULL;
 960
 961     /* reset panels position and size */
 962     /* XXX  use i_width */
 963     XResizeWindow( p_display, video, window.width, window.height );
 964     XMoveWindow( p_display, control, 0, window.height-1 );
 965     XResizeWindow( p_display, control, window.width, 1 );
 966
 967     b_toolbar = 0; /* says toolbar is now hidden */
 968     redrawToolbar();
 969 }
 970
 971 void VlcPlugin::redrawToolbar()
 972 {
 973     int is_playing = 0;
 974     bool b_mute = false;
 975     unsigned int dst_x, dst_y;
 976     GC gc;
 977     XGCValues gcv;
 978     unsigned int i_tb_width, i_tb_height;
 979
 980     /* This method does nothing if toolbar is hidden. */
 981     if( !b_toolbar || !libvlc_media_player )
 982         return;
 983
 984     const NPWindow& window = getWindow();
 985     Window control = getControlWindow();
 986     Display *p_display = ((NPSetWindowCallbackStruct *)window.ws_info)->display;
 987
 988     getToolbarSize( &i_tb_width, &i_tb_height );
 989
 990     /* get mute info */
 991     b_mute = libvlc_audio_get_mute( libvlc_media_player );
 992
 993     gcv.foreground = BlackPixel( p_display, 0 );
 994     gc = XCreateGC( p_display, control, GCForeground, &gcv );
 995
 996     XFillRectangle( p_display, control, gc,
 997                     0, 0, window.width, i_tb_height );
 998     gcv.foreground = WhitePixel( p_display, 0 );
 999     XChangeGC( p_display, gc, GCForeground, &gcv );
1000
1001     /* position icons */
1002     dst_x = BTN_SPACE;
1003     dst_y = i_tb_height >> 1; /* baseline = vertical middle */
1004
1005     if( p_btnPause && (is_playing == 1) )
1006     {
1007         XPutImage( p_display, control, gc, p_btnPause, 0, 0, dst_x,
1008                    dst_y - (p_btnPause->height >> 1),
1009                    p_btnPause->width, p_btnPause->height );
1010         dst_x += BTN_SPACE + p_btnPause->width;
1011     }
1012     else if( p_btnPlay )
1013     {
1014         XPutImage( p_display, control, gc, p_btnPlay, 0, 0, dst_x,
1015                    dst_y - (p_btnPlay->height >> 1),
1016                    p_btnPlay->width, p_btnPlay->height );
1017         dst_x += BTN_SPACE + p_btnPlay->width;
1018     }
1019
1020     if( p_btnStop )
1021         XPutImage( p_display, control, gc, p_btnStop, 0, 0, dst_x,
1022                    dst_y - (p_btnStop->height >> 1),
1023                    p_btnStop->width, p_btnStop->height );
1024
1025     dst_x += BTN_SPACE + ( p_btnStop ? p_btnStop->width : 0 );
1026
1027     if( p_btnFullscreen )
1028         XPutImage( p_display, control, gc, p_btnFullscreen, 0, 0, dst_x,
1029                    dst_y - (p_btnFullscreen->height >> 1),
1030                    p_btnFullscreen->width, p_btnFullscreen->height );
1031
1032     dst_x += BTN_SPACE + ( p_btnFullscreen ? p_btnFullscreen->width : 0 );
1033
1034     if( p_btnUnmute && b_mute )
1035     {
1036         XPutImage( p_display, control, gc, p_btnUnmute, 0, 0, dst_x,
1037                    dst_y - (p_btnUnmute->height >> 1),
1038                    p_btnUnmute->width, p_btnUnmute->height );
1039
1040         dst_x += BTN_SPACE + ( p_btnUnmute ? p_btnUnmute->width : 0 );
1041     }
1042     else if( p_btnMute )
1043     {
1044         XPutImage( p_display, control, gc, p_btnMute, 0, 0, dst_x,
1045                    dst_y - (p_btnMute->height >> 1),
1046                    p_btnMute->width, p_btnMute->height );
1047
1048         dst_x += BTN_SPACE + ( p_btnMute ? p_btnMute->width : 0 );
1049     }
1050
1051     if( p_timeline )
1052         XPutImage( p_display, control, gc, p_timeline, 0, 0, dst_x,
1053                    dst_y - (p_timeline->height >> 1),
1054                    (window.width-(dst_x+BTN_SPACE)), p_timeline->height );
1055
1056     /* get movie position in % */
1057     if( playlist_isplaying() )
1058     {
1059         i_last_position = (int)((window.width-(dst_x+BTN_SPACE))*
1060                    libvlc_media_player_get_position(libvlc_media_player));
1061     }
1062
1063     if( p_btnTime )
1064         XPutImage( p_display, control, gc, p_btnTime,
1065                    0, 0, (dst_x+i_last_position),
1066                    dst_y - (p_btnTime->height >> 1),
1067                    p_btnTime->width, p_btnTime->height );
1068
1069     XFreeGC( p_display, gc );
1070 }
1071
1072 vlc_toolbar_clicked_t VlcPlugin::getToolbarButtonClicked( int i_xpos, int i_ypos )
1073 {
1074     unsigned int i_dest = BTN_SPACE;
1075     int is_playing = 0;
1076     bool b_mute = false;
1077
1078 #ifndef NDEBUG
1079     fprintf( stderr, "ToolbarButtonClicked:: "
1080                      "trying to match (%d,%d) (%d,%d)\n",
1081              i_xpos, i_ypos, i_tb_height, i_tb_width );
1082 #endif
1083     if( i_ypos >= i_tb_width )
1084         return clicked_Unknown;
1085
1086     /* Note: the order of testing is dependend on the original
1087      * drawing positions of the icon buttons. Buttons are tested
1088      * left to right.
1089      */
1090
1091     /* get isplaying */
1092     is_playing = playlist_isplaying();
1093
1094     /* get mute info */
1095     if( libvlc_media_player )
1096         b_mute = libvlc_audio_get_mute( libvlc_media_player );
1097
1098     /* is Pause of Play button clicked */
1099     if( (is_playing != 1) &&
1100         (i_xpos >= (BTN_SPACE>>1)) &&
1101         (i_xpos <= i_dest + p_btnPlay->width + (BTN_SPACE>>1)) )
1102         return clicked_Play;
1103     else if( (i_xpos >= (BTN_SPACE>>1))  &&
1104              (i_xpos <= i_dest + p_btnPause->width) )
1105         return clicked_Pause;
1106
1107     /* is Stop button clicked */
1108     if( is_playing != 1 )
1109         i_dest += (p_btnPlay->width + (BTN_SPACE>>1));
1110     else
1111         i_dest += (p_btnPause->width + (BTN_SPACE>>1));
1112
1113     if( (i_xpos >= i_dest) &&
1114         (i_xpos <= i_dest + p_btnStop->width + (BTN_SPACE>>1)) )
1115         return clicked_Stop;
1116
1117     /* is Fullscreen button clicked */
1118     i_dest += (p_btnStop->width + (BTN_SPACE>>1));
1119     if( (i_xpos >= i_dest) &&
1120         (i_xpos <= i_dest + p_btnFullscreen->width + (BTN_SPACE>>1)) )
1121         return clicked_Fullscreen;
1122
1123     /* is Mute or Unmute button clicked */
1124     i_dest += (p_btnFullscreen->width + (BTN_SPACE>>1));
1125     if( !b_mute && (i_xpos >= i_dest) &&
1126         (i_xpos <= i_dest + p_btnMute->width + (BTN_SPACE>>1)) )
1127         return clicked_Mute;
1128     else if( (i_xpos >= i_dest) &&
1129              (i_xpos <= i_dest + p_btnUnmute->width + (BTN_SPACE>>1)) )
1130         return clicked_Unmute;
1131
1132     /* is timeline clicked */
1133     if( !b_mute )
1134         i_dest += (p_btnMute->width + (BTN_SPACE>>1));
1135     else
1136         i_dest += (p_btnUnmute->width + (BTN_SPACE>>1));
1137     if( (i_xpos >= i_dest) &&
1138         (i_xpos <= i_dest + p_timeline->width + (BTN_SPACE>>1)) )
1139         return clicked_timeline;
1140
1141     /* is time button clicked */
1142     i_dest += (p_timeline->width + (BTN_SPACE>>1));
1143     if( (i_xpos >= i_dest) &&
1144         (i_xpos <= i_dest + p_btnTime->width + (BTN_SPACE>>1)) )
1145         return clicked_Time;
1146
1147     return clicked_Unknown;
1148 }
1149 #undef BTN_SPACE
1150 #endif
1151
1152 // Verifies the version of the NPAPI.
1153 // The eventListeners use a NPAPI function available
1154 // since Gecko 1.9.
1155 bool VlcPlugin::canUseEventListener()
1156 {
1157     int plugin_major, plugin_minor;
1158     int browser_major, browser_minor;
1159
1160     NPN_Version(&plugin_major, &plugin_minor,
1161                 &browser_major, &browser_minor);
1162
1163     if (browser_minor >= 19 || browser_major > 0)
1164         return true;
1165     return false;
1166 }