interpreter.cpp

VLC Player Source Code

        else
        {
            TopWindow *pWin = pTheme->getWindowById( windowId );
            if( pWin )
            {
                pCommand = new CmdShowWindow( getIntf(),
                                              pTheme->getWindowManager(),
                                              *pWin );
            }
            else
            {
                // It was maybe the id of a popup
                Popup *pPopup = pTheme->getPopupById( windowId );
                if( pPopup )
                {
                    pCommand = new CmdShowPopup( getIntf(), *pPopup );
                }
                else
                {
                    msg_Err( getIntf(), "unknown window or popup (%s)",
                             windowId.c_str() );
                }
            }
        }
    }
    else if( rAction.find( ".hide()" ) != string::npos )
    {
        int leftPos = rAction.find( ".hide()" );
        string windowId = rAction.substr( 0, leftPos );
        if( windowId == "playlist_window" &&
           ! config_GetInt( getIntf(), "skinned-playlist") )
        {
            list<CmdGeneric *> list;
            list.push_back( new CmdDlgPlaylist( getIntf() ) );
            TopWindow *pWin = pTheme->getWindowById( windowId );
            if( pWin )
                list.push_back( new CmdHideWindow( getIntf(),
                                                   pTheme->getWindowManager(),
                                                   *pWin ) );
            pCommand = new CmdMuxer( getIntf(), list );
        }
        else
        {
            TopWindow *pWin = pTheme->getWindowById( windowId );
            if( pWin )
            {
                pCommand = new CmdHideWindow( getIntf(),
                                              pTheme->getWindowManager(),
                                              *pWin );
            }
            else
            {
                msg_Err( getIntf(), "unknown window (%s)", windowId.c_str() );
            }
        }
    }

    if( pCommand )
    {
        // Add the command in the pool
        pTheme->m_commands.push_back( CmdGenericPtr( pCommand ) );
    }
    else
    {
        msg_Warn( getIntf(), "unknown action: %s", rAction.c_str() );
    }

    return pCommand;
}


VarBool *Interpreter::getVarBool( const string &rName, Theme *pTheme )
{
    VarManager *pVarManager = VarManager::instance( getIntf() );

    // Convert the expression into Reverse Polish Notation
    ExprEvaluator evaluator( getIntf() );
    evaluator.parse( rName );

    list<VarBool*> varStack;

    // Get the first token from the RPN stack
    string token = evaluator.getToken();
    while( !token.empty() )
    {
        if( token == "and" )
        {
            // Get the 2 last variables on the stack
            if( varStack.empty() )
            {
                msg_Err( getIntf(), "invalid boolean expression: %s",
                         rName.c_str());
                return NULL;
            }
            VarBool *pVar1 = varStack.back();
            varStack.pop_back();
            if( varStack.empty() )
            {
                msg_Err( getIntf(), "invalid boolean expression: %s",
                         rName.c_str());
                return NULL;
            }
            VarBool *pVar2 = varStack.back();
            varStack.pop_back();

            // Create a composite boolean variable
            VarBool *pNewVar = new VarBoolAndBool( getIntf(), *pVar1, *pVar2 );
            varStack.push_back( pNewVar );
            // Register this variable in the manager
            pVarManager->registerVar( VariablePtr( pNewVar ) );
        }
        else if( token == "or" )
        {
            // Get the 2 last variables on the stack
            if( varStack.empty() )
            {
                msg_Err( getIntf(), "invalid boolean expression: %s",
                         rName.c_str());
                return NULL;
            }
            VarBool *pVar1 = varStack.back();
            varStack.pop_back();
            if( varStack.empty() )
            {
                msg_Err( getIntf(), "invalid boolean expression: %s",
                         rName.c_str());
                return NULL;
            }
            VarBool *pVar2 = varStack.back();
            varStack.pop_back();

            // Create a composite boolean variable
            VarBool *pNewVar = new VarBoolOrBool( getIntf(), *pVar1, *pVar2 );
            varStack.push_back( pNewVar );
            // Register this variable in the manager
            pVarManager->registerVar( VariablePtr( pNewVar ) );
        }
        else if( token == "not" )
        {
            // Get the last variable on the stack
            if( varStack.empty() )
            {
                msg_Err( getIntf(), "invalid boolean expression: %s",
                         rName.c_str());
                return NULL;
            }
            VarBool *pVar = varStack.back();
            varStack.pop_back();

            // Create a composite boolean variable
            VarBool *pNewVar = new VarNotBool( getIntf(), *pVar );
            varStack.push_back( pNewVar );
            // Register this variable in the manager
            pVarManager->registerVar( VariablePtr( pNewVar ) );
        }
        else
        {
            // Try first to get the variable from the variable manager
            // Indeed, if the skin designer is stupid enough to call a layout
            // "dvd", we want "dvd.isActive" to resolve as the built-in action
            // and not as the "layoutId.isActive" one.
            VarBool *pVar = (VarBool*)pVarManager->getVar( token, "bool" );
            if( pVar )
            {
                varStack.push_back( pVar );
            }
            else if( token.find( ".isVisible" ) != string::npos )
            {
                int leftPos = token.find( ".isVisible" );
                string windowId = token.substr( 0, leftPos );
                TopWindow *pWin = pTheme->getWindowById( windowId );
                if( pWin )
                {
                    // Push the visibility variable onto the stack
                    varStack.push_back( &pWin->getVisibleVar() );
                }
                else
                {
                    msg_Err( getIntf(), "unknown window (%s)",
                             windowId.c_str() );
                    return NULL;
                }
            }
            else if( token.find( ".isMaximized" ) != string::npos )
            {
                int leftPos = token.find( ".isMaximized" );
                string windowId = token.substr( 0, leftPos );
                TopWindow *pWin = pTheme->getWindowById( windowId );
                if( pWin )
                {
                    // Push the "maximized" variable onto the stack
                    varStack.push_back( &pWin->getMaximizedVar() );
                }
                else
                {
                    msg_Err( getIntf(), "unknown window (%s)",
                             windowId.c_str() );
                    return NULL;
                }
            }
            else if( token.find( ".isActive" ) != string::npos )
            {
                int leftPos = token.find( ".isActive" );
                string layoutId = token.substr( 0, leftPos );
                GenericLayout *pLayout = pTheme->getLayoutById( layoutId );
                if( pLayout )
                {
                    // Push the isActive variable onto the stack
                    varStack.push_back( &pLayout->getActiveVar() );
                }
                else
                {
                    msg_Err( getIntf(), "unknown layout (%s)",
                             layoutId.c_str() );
                    return NULL;
                }
            }
            else
            {
                msg_Err( getIntf(), "cannot resolve boolean variable: %s",
                         token.c_str());
                return NULL;
            }
        }
        // Get the first token from the RPN stack
        token = evaluator.getToken();
    }

    // The stack should contain a single variable
    if( varStack.size() != 1 )
    {
        msg_Err( getIntf(), "invalid boolean expression: %s", rName.c_str() );
        return NULL;
    }
    return varStack.back();
}


VarPercent *Interpreter::getVarPercent( const string &rName, Theme *pTheme )
{
    // Try to get the variable from the variable manager
    VarManager *pVarManager = VarManager::instance( getIntf() );
    VarPercent *pVar = (VarPercent*)pVarManager->getVar( rName, "percent" );
    return pVar;
}


VarList *Interpreter::getVarList( const string &rName, Theme *pTheme )
{
    // Try to get the variable from the variable manager
    VarManager *pVarManager = VarManager::instance( getIntf() );
    VarList *pVar = (VarList*)pVarManager->getVar( rName, "list" );
    return pVar;
}


VarTree *Interpreter::getVarTree( const string &rName, Theme *pTheme )
{
    // Try to get the variable from the variable manager
    VarManager *pVarManager = VarManager::instance( getIntf() );
    VarTree *pVar = (VarTree*)pVarManager->getVar( rName, "tree" );
    return pVar;
}


string Interpreter::getConstant( const string &rValue )
{
    // Check if the value is a registered constant
    string val = VarManager::instance( getIntf() )->getConst( rValue );
    if( val.empty() )
    {
        // if not, keep the value as is
        val = rValue;
    }
    return val;
}