git.sesse.net Git - vlc/blob - modules/gui/skins2/parser/interpreter.cpp

   1 /*****************************************************************************
   2  * interpreter.cpp
   3  *****************************************************************************
   4  * Copyright (C) 2003 VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Cyril Deguet     <asmax@via.ecp.fr>
   8  *          Olivier Teulière <ipkiss@via.ecp.fr>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  23  *****************************************************************************/
  24
  25 #include "interpreter.hpp"
  26 #include "expr_evaluator.hpp"
  27 #include "../commands/cmd_playlist.hpp"
  28 #include "../commands/cmd_dialogs.hpp"
  29 #include "../commands/cmd_dummy.hpp"
  30 #include "../commands/cmd_layout.hpp"
  31 #include "../commands/cmd_quit.hpp"
  32 #include "../commands/cmd_minimize.hpp"
  33 #include "../commands/cmd_input.hpp"
  34 #include "../commands/cmd_fullscreen.hpp"
  35 #include "../commands/cmd_on_top.hpp"
  36 #include "../commands/cmd_show_window.hpp"
  37 #include "../src/theme.hpp"
  38 #include "../src/var_manager.hpp"
  39 #include "../src/vlcproc.hpp"
  40
  41
  42 Interpreter::Interpreter( intf_thread_t *pIntf ): SkinObject( pIntf )
  43 {
  44     /// Create the generic commands
  45 #define REGISTER_CMD( name, cmd ) \
  46     m_commandMap[name] = CmdGenericPtr( new cmd( getIntf() ) );
  47
  48     REGISTER_CMD( "none", CmdDummy )
  49     REGISTER_CMD( "dialogs.changeSkin()", CmdDlgChangeSkin )
  50     REGISTER_CMD( "dialogs.fileSimple()", CmdDlgFileSimple )
  51     REGISTER_CMD( "dialogs.file()", CmdDlgFile )
  52     REGISTER_CMD( "dialogs.disc()", CmdDlgDisc )
  53     REGISTER_CMD( "dialogs.net()", CmdDlgNet )
  54     REGISTER_CMD( "dialogs.messages()", CmdDlgMessages )
  55     REGISTER_CMD( "dialogs.prefs()", CmdDlgPrefs )
  56     REGISTER_CMD( "dialogs.fileInfo()", CmdDlgFileInfo )
  57     REGISTER_CMD( "dialogs.popup()", CmdDlgShowPopupMenu )
  58     REGISTER_CMD( "playlist.load()", CmdDlgPlaylistLoad )
  59     REGISTER_CMD( "playlist.save()", CmdDlgPlaylistSave )
  60     REGISTER_CMD( "playlist.add()", CmdDlgAdd )
  61     VarList &rVar = VlcProc::instance( getIntf() )->getPlaylistVar();
  62     m_commandMap["playlist.del()"] =
  63         CmdGenericPtr( new CmdPlaylistDel( getIntf(), rVar ) );
  64     REGISTER_CMD( "playlist.next()", CmdPlaylistNext )
  65     REGISTER_CMD( "playlist.previous()", CmdPlaylistPrevious )
  66     REGISTER_CMD( "playlist.sort()", CmdPlaylistSort )
  67     m_commandMap["playlist.setRandom(true)"] =
  68         CmdGenericPtr( new CmdPlaylistRandom( getIntf(), true ) );
  69     m_commandMap["playlist.setRandom(false)"] =
  70         CmdGenericPtr( new CmdPlaylistRandom( getIntf(), false ) );
  71     m_commandMap["playlist.setLoop(true)"] =
  72         CmdGenericPtr( new CmdPlaylistLoop( getIntf(), true ) );
  73     m_commandMap["playlist.setLoop(false)"] =
  74         CmdGenericPtr( new CmdPlaylistLoop( getIntf(), false ) );
  75     m_commandMap["playlist.setRepeat(true)"] =
  76         CmdGenericPtr( new CmdPlaylistRepeat( getIntf(), true ) );
  77     m_commandMap["playlist.setRepeat(false)"] =
  78         CmdGenericPtr( new CmdPlaylistRepeat( getIntf(), false ) );
  79     REGISTER_CMD( "vlc.fullscreen()", CmdFullscreen )
  80     REGISTER_CMD( "vlc.play()", CmdPlay )
  81     REGISTER_CMD( "vlc.pause()", CmdPause )
  82     REGISTER_CMD( "vlc.stop()", CmdStop )
  83     REGISTER_CMD( "vlc.faster()", CmdFaster )
  84     REGISTER_CMD( "vlc.slower()", CmdSlower )
  85     REGISTER_CMD( "vlc.mute()", CmdMute )
  86     REGISTER_CMD( "vlc.volumeUp()", CmdVolumeUp )
  87     REGISTER_CMD( "vlc.volumeDown()", CmdVolumeDown )
  88     REGISTER_CMD( "vlc.minimize()", CmdMinimize )
  89     REGISTER_CMD( "vlc.onTop()", CmdOnTop )
  90     REGISTER_CMD( "vlc.quit()", CmdQuit )
  91
  92     // Register the constant bool variables in the var manager
  93     VarManager *pVarManager = VarManager::instance( getIntf() );
  94     VarBool *pVarTrue = new VarBoolTrue( getIntf() );
  95     pVarManager->registerVar( VariablePtr( pVarTrue ), "true" );
  96     VarBool *pVarFalse = new VarBoolFalse( getIntf() );
  97     pVarManager->registerVar( VariablePtr( pVarFalse ), "false" );
  98 }
  99
 100
 101 Interpreter *Interpreter::instance( intf_thread_t *pIntf )
 102 {
 103     if( ! pIntf->p_sys->p_interpreter )
 104     {
 105         Interpreter *pInterpreter;
 106         pInterpreter = new Interpreter( pIntf );
 107         if( pInterpreter )
 108         {
 109             pIntf->p_sys->p_interpreter = pInterpreter;
 110         }
 111     }
 112     return pIntf->p_sys->p_interpreter;
 113 }
 114
 115
 116 void Interpreter::destroy( intf_thread_t *pIntf )
 117 {
 118     if( pIntf->p_sys->p_interpreter )
 119     {
 120         delete pIntf->p_sys->p_interpreter;
 121         pIntf->p_sys->p_interpreter = NULL;
 122     }
 123 }
 124
 125
 126 CmdGeneric *Interpreter::parseAction( const string &rAction, Theme *pTheme )
 127 {
 128     // Try to find the command in the global command map
 129     if( m_commandMap.find( rAction ) != m_commandMap.end() )
 130     {
 131         return m_commandMap[rAction].get();
 132     }
 133
 134     CmdGeneric *pCommand = NULL;
 135
 136     if( rAction.find( ".setLayout(" ) != string::npos )
 137     {
 138         int leftPos = rAction.find( ".setLayout(" );
 139         string windowId = rAction.substr( 0, leftPos );
 140         // 11 is the size of ".setLayout("
 141         int rightPos = rAction.find( ")", windowId.size() + 11 );
 142         string layoutId = rAction.substr( windowId.size() + 11,
 143                                           rightPos - (windowId.size() + 11) );
 144         pCommand = new CmdLayout( getIntf(), windowId, layoutId );
 145     }
 146     else if( rAction.find( ".show()" ) != string::npos )
 147     {
 148         int leftPos = rAction.find( ".show()" );
 149         string windowId = rAction.substr( 0, leftPos );
 150         TopWindow *pWin = pTheme->getWindowById( windowId );
 151         if( pWin )
 152         {
 153             pCommand = new CmdShowWindow( getIntf(), pTheme->getWindowManager(),
 154                                           *pWin );
 155         }
 156         else
 157         {
 158             msg_Err( getIntf(), "Unknown window (%s)", windowId.c_str() );
 159         }
 160     }
 161     else if( rAction.find( ".hide()" ) != string::npos )
 162     {
 163         int leftPos = rAction.find( ".hide()" );
 164         string windowId = rAction.substr( 0, leftPos );
 165         TopWindow *pWin = pTheme->getWindowById( windowId );
 166         if( pWin )
 167         {
 168             pCommand = new CmdHideWindow( getIntf(), pTheme->getWindowManager(),
 169                                           *pWin );
 170         }
 171         else
 172         {
 173             msg_Err( getIntf(), "Unknown window (%s)", windowId.c_str() );
 174         }
 175     }
 176
 177     if( pCommand )
 178     {
 179         // Add the command in the pool
 180         pTheme->m_commands.push_back( CmdGenericPtr( pCommand ) );
 181     }
 182
 183     return pCommand;
 184 }
 185
 186
 187 VarBool *Interpreter::getVarBool( const string &rName, Theme *pTheme )
 188 {
 189     VarManager *pVarManager = VarManager::instance( getIntf() );
 190
 191     // Convert the expression into Reverse Polish Notation
 192     ExprEvaluator evaluator( getIntf() );
 193     evaluator.parse( rName );
 194
 195     list<VarBool*> varStack;
 196
 197     // Get the first token from the RPN stack
 198     string token = evaluator.getToken();
 199     while( !token.empty() )
 200     {
 201         if( token == "and" )
 202         {
 203             // Get the 2 last variables on the stack
 204             if( varStack.empty() )
 205             {
 206                 msg_Err( getIntf(), "Invalid boolean expression: %s",
 207                          rName.c_str());
 208                 return NULL;
 209             }
 210             VarBool *pVar1 = varStack.back();
 211             varStack.pop_back();
 212             if( varStack.empty() )
 213             {
 214                 msg_Err( getIntf(), "Invalid boolean expression: %s",
 215                          rName.c_str());
 216                 return NULL;
 217             }
 218             VarBool *pVar2 = varStack.back();
 219             varStack.pop_back();
 220
 221             // Create a composite boolean variable
 222             VarBool *pNewVar = new VarBoolAndBool( getIntf(), *pVar1, *pVar2 );
 223             varStack.push_back( pNewVar );
 224             // Register this variable in the manager
 225             pVarManager->registerVar( VariablePtr( pNewVar ) );
 226         }
 227         else if( token == "or" )
 228         {
 229             // Get the 2 last variables on the stack
 230             if( varStack.empty() )
 231             {
 232                 msg_Err( getIntf(), "Invalid boolean expression: %s",
 233                          rName.c_str());
 234                 return NULL;
 235             }
 236             VarBool *pVar1 = varStack.back();
 237             varStack.pop_back();
 238             if( varStack.empty() )
 239             {
 240                 msg_Err( getIntf(), "Invalid boolean expression: %s",
 241                          rName.c_str());
 242                 return NULL;
 243             }
 244             VarBool *pVar2 = varStack.back();
 245             varStack.pop_back();
 246
 247             // Create a composite boolean variable
 248             VarBool *pNewVar = new VarBoolOrBool( getIntf(), *pVar1, *pVar2 );
 249             varStack.push_back( pNewVar );
 250             // Register this variable in the manager
 251             pVarManager->registerVar( VariablePtr( pNewVar ) );
 252         }
 253         else if( token == "not" )
 254         {
 255             // Get the last variable on the stack
 256             if( varStack.empty() )
 257             {
 258                 msg_Err( getIntf(), "Invalid boolean expression: %s",
 259                          rName.c_str());
 260                 return NULL;
 261             }
 262             VarBool *pVar = varStack.back();
 263             varStack.pop_back();
 264
 265             // Create a composite boolean variable
 266             VarBool *pNewVar = new VarNotBool( getIntf(), *pVar );
 267             varStack.push_back( pNewVar );
 268             // Register this variable in the manager
 269             pVarManager->registerVar( VariablePtr( pNewVar ) );
 270         }
 271         else if( token.find( ".isVisible" ) != string::npos )
 272         {
 273             int leftPos = token.find( ".isVisible" );
 274             string windowId = token.substr( 0, leftPos );
 275             TopWindow *pWin = pTheme->getWindowById( windowId );
 276             if( pWin )
 277             {
 278                 // Push the visibility variable on the stack
 279                 varStack.push_back( &pWin->getVisibleVar() );
 280             }
 281             else
 282             {
 283                 msg_Err( getIntf(), "Unknown window (%s)", windowId.c_str() );
 284                 return NULL;
 285             }
 286         }
 287         else
 288         {
 289             // Try to get the variable from the variable manager
 290             VarBool *pVar = (VarBool*)pVarManager->getVar( token, "bool" );
 291             if( !pVar )
 292             {
 293                 msg_Err( getIntf(), "Cannot resolve boolean variable: %s",
 294                          token.c_str());
 295                 return NULL;
 296             }
 297             varStack.push_back( pVar );
 298         }
 299         // Get the first token from the RPN stack
 300         token = evaluator.getToken();
 301     }
 302
 303     // The stack should contain a single variable
 304     if( varStack.size() != 1 )
 305     {
 306         msg_Err( getIntf(), "Invalid boolean expression: %s", rName.c_str() );
 307         return NULL;
 308     }
 309     return varStack.back();
 310 }
 311
 312
 313 VarPercent *Interpreter::getVarPercent( const string &rName, Theme *pTheme )
 314 {
 315     // Try to get the variable from the variable manager
 316     VarManager *pVarManager = VarManager::instance( getIntf() );
 317     VarPercent *pVar = (VarPercent*)pVarManager->getVar( rName, "percent" );
 318     return pVar;
 319 }
 320
 321
 322 VarList *Interpreter::getVarList( const string &rName, Theme *pTheme )
 323 {
 324     // Try to get the variable from the variable manager
 325     VarManager *pVarManager = VarManager::instance( getIntf() );
 326     VarList *pVar = (VarList*)pVarManager->getVar( rName, "list" );
 327     return pVar;
 328 }
 329