PureData/source/j.cue/j.cue.cpp

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/** @file
 * 
 * @ingroup implementationPdExternals
 *
 * @brief j.cue - store and recall the state of several models
 *
 * @details
 *
 * @authors Théo de la Hogue, Trond Lossius, Antoine Villeret
 *
 * @copyright © 2010 by Théo de la Hogue @n
 * Copyright © 2015, Antoine Villeret@n
 * This code is licensed under the terms of the "New BSD License" @n
 * http://creativecommons.org/licenses/BSD/
 */


#include "TTModularClassWrapperPd.h"

// This is used to store extra data
typedef struct extra {
    TTObject    *toEdit;                // the object to edit (a cue or all the cuelist)
    TTSymbol    cueName;            // the name of the edited cue
    TTString    *text;              // the text of the editor to read after edclose
    t_object*   textEditor;         // the text editor window
} t_extra;
#define EXTRA ((t_extra*)x->extra)

#define line_out 0
#define dump_out 1

// Definitions
void        WrapTTCueManagerClass(WrappedClassPtr c);
void        WrappedCueManagerClass_new(TTPtr self, long argc, t_atom *argv);
void        WrappedCueManageClass_free(TTPtr self);

void        cue_assist(TTPtr self, void *b, long msg, long arg, char *dst);

void        cue_return_value(TTPtr self, t_symbol *msg, long argc, t_atom *argv);
void        cue_return_names(TTPtr self, t_symbol *msg, long argc, t_atom *argv);

void        cue_get(TTPtr self, t_symbol *msg, long argc, t_atom *argv);
void        cue_set(TTPtr self, t_symbol *msg, long argc, t_atom *argv);

void        cue_read(TTPtr self, t_symbol *msg, long argc, t_atom *argv);
void        cue_doread(TTPtr self, t_symbol *msg, long argc, t_atom *argv);
void        cue_read_again(TTPtr self);
void        cue_doread_again(TTPtr self);

void        cue_write(TTPtr self, t_symbol *msg, long argc, t_atom *argv);
void        cue_dowrite(TTPtr self, t_symbol *msg, long argc, t_atom *argv);
void        cue_write_again(TTPtr self);
void        cue_dowrite_again(TTPtr self);

void        cue_dorecall(TTPtr self, t_symbol *msg, long argc, t_atom *argv);

void        cue_edit(TTPtr self, t_symbol *msg, long argc, t_atom *argv);
void        cue_edclose(TTPtr self, char **text, long size);
void        cue_doedit(TTPtr self);

void        cue_subscribe(TTPtr self);

void        cue_return_model_address(TTPtr self, t_symbol *msg, long argc, t_atom *argv);

t_max_err   cue_get_relative(TTPtr self, TTPtr attr, long *ac, t_atom **av);
t_max_err   cue_set_relative(TTPtr self, TTPtr attr, long ac,  t_atom *av);

extern "C" void JAMOMA_EXPORT_MAXOBJ setup_j0x2ecue(void)
{
    ModularSpec *spec = new ModularSpec;
    spec->_wrap = &WrapTTCueManagerClass;
    spec->_new = &WrappedCueManagerClass_new;
    spec->_free = &WrappedCueManageClass_free;
    spec->_any = NULL;
    
    return (void)wrapTTModularClassAsPdClass(kTTSym_CueManager, "j.cue", NULL, spec);
}

void WrapTTCueManagerClass(WrappedClassPtr c)
{
    eclass_addmethod(c->pdClass, (method)cue_assist,                "assist",               A_CANT, 0L);

    eclass_addmethod(c->pdClass, (method)cue_subscribe,             "loadbang",             A_NULL, 0L);
    
    eclass_addmethod(c->pdClass, (method)cue_return_model_address,  "return_model_address", A_CANT, 0);
    
    eclass_addmethod(c->pdClass, (method)cue_return_value,          "return_value",         A_CANT, 0);
    
    eclass_addmethod(c->pdClass, (method)cue_return_names,          "return_names",         A_CANT, 0);
    
    eclass_addmethod(c->pdClass, (method)cue_read,                  "cue_read",             A_CANT, 0);
    eclass_addmethod(c->pdClass, (method)cue_write,                 "cue_write",            A_CANT, 0);
    
    eclass_addmethod(c->pdClass, (method)cue_edit,                  "dblclick",             A_CANT, 0);
    eclass_addmethod(c->pdClass, (method)cue_edclose,               "edclose",              A_CANT, 0);
    
    eclass_addmethod(c->pdClass, (method)cue_get,                   "get",                  A_GIMME, 0);
    eclass_addmethod(c->pdClass, (method)cue_set,                   "set",                  A_GIMME, 0);
    
    eclass_addmethod(c->pdClass, (method)cue_read,                  "read",                 A_GIMME, 0);
    eclass_addmethod(c->pdClass, (method)cue_write,                 "write",                A_GIMME, 0);
    eclass_addmethod(c->pdClass, (method)cue_edit,                  "edit",                 A_GIMME, 0);
    
    eclass_addmethod(c->pdClass, (method)cue_read_again,            "read/again",           A_NULL, 0);
    eclass_addmethod(c->pdClass, (method)cue_write_again,           "write/again",          A_NULL, 0);
    
    CLASS_ATTR_LONG(c->pdClass,         "relative", 0,      WrappedModularInstance, index); // use index member to store relative
    CLASS_ATTR_ACCESSORS(c->pdClass,    "relative", cue_get_relative,   cue_set_relative);
    CLASS_ATTR_STYLE(c->pdClass,        "relative", 0,      "onoff");
}

void WrappedCueManagerClass_new(TTPtr self, long argc, t_atom *argv)
{
    WrappedModularInstancePtr   x = (WrappedModularInstancePtr)self;
    t_symbol*                   name;
    TTValue                     v, args;
    TTObject                    aTextHandler;
    long                        attrstart = attr_args_offset(argc, argv);           // support normal arguments
    
    // create the cue manager
    jamoma_cueManager_create((t_object*)x, x->wrappedObject);
    
    // read first argument to know if the cue binds a namespace
    if (attrstart && argv) {
        
        if (atom_gettype(argv) == A_SYM) {
            
            name = atom_getsym(argv);
            x->wrappedObject.set(kTTSym_namespace, TTSymbol(name->s_name));
        }
        else
            pd_error((t_object*)x, "argument not expected");
    }
    
    // Make two outlets
    x->outlets = (TTHandle)sysmem_newptr(sizeof(TTPtr) * 1);
    x->outlets[line_out] = outlet_new((t_object*)x, NULL);                      // anything outlet to output data

    // Prepare Internals hash to store TextHandler object
    x->internals = new TTHash();
    
    // create internal TTTextHandler
    aTextHandler = TTObject(kTTSym_TextHandler);
    x->internals->append(kTTSym_TextHandler, aTextHandler);
    
    // Prepare extra data
    x->extra = (t_extra*)malloc(sizeof(t_extra));
    EXTRA->toEdit = new TTObject();
    *EXTRA->toEdit = x->wrappedObject;
    EXTRA->cueName = kTTSymEmpty;
    EXTRA->text = NULL;
    EXTRA->textEditor = NULL;
    
    // handle attribute args
    attr_args_process(x, argc, argv);
}

void WrappedCueManageClass_free(TTPtr self)
{
    WrappedModularInstancePtr   x = (WrappedModularInstancePtr)self;
    
    delete EXTRA->toEdit;
    
    // the texthanler have to forget the cue manager object
    TTValue o;
    x->internals->lookup(kTTSym_TextHandler, o);
    TTObject empty, aTextHandler = o[0];
    aTextHandler.set(kTTSym_object, empty);
    
    free(EXTRA);
}

void cue_subscribe(TTPtr self)
{
    WrappedModularInstancePtr   x = (WrappedModularInstancePtr)self;
    TTValue                     v;
    TTAddress                   contextAddress = kTTAdrsEmpty;
    TTAddress                   absoluteAddress, returnedAddress;
    TTNodePtr                   returnedNode;
    TTNodePtr                   returnedContextNode;
    TTObject                    anObject, empty;
    
    jamoma_patcher_get_info(((t_eobj*)x)->o_canvas, &x->patcherPtr, x->patcherContext, x->patcherClass, x->patcherName);
    
    if (!jamoma_subscriber_create((t_eobj*)x, empty, kTTAdrsEmpty, x->subscriberObject, returnedAddress, &returnedNode, &returnedContextNode)) {
        
        // get the context address to make
        // a receiver on the contextAddress/model:address attribute
        x->subscriberObject.get("contextAddress", v);
        contextAddress = v[0];
    }

    post("j.cue : contextAddress : %s",contextAddress.c_str());
    
    // bind on the model:address attribute
    if (contextAddress != kTTAdrsEmpty) {
        
        absoluteAddress = contextAddress.appendAddress(x->address);
        x->wrappedObject.set(kTTSym_address, x->address);
        
        makeInternals_receiver(x, contextAddress, TTSymbol("/model:address"), gensym("return_model_address"), anObject, YES); // YES : we want to deferlow this method
    }
    
    // while the context node is not registered : try to binds again :(
    // (to -- this is not a good way todo. For binding we should make a subscription
    // to a notification mechanism and each time an TTObjet subscribes to the namespace
    // using jamoma_subscriber_create we notify all the externals which have used
    // jamoma_subscriber_create with NULL object to bind)
    else {
        
        // release the subscriber
        x->subscriberObject = TTObject();
        
        // The following must be deferred because we have to interrogate our box,
        // and our box is not yet valid until we have finished instantiating the object.
        // Trying to use a loadbang method instead is also not fully successful (as of Max 5.0.6)
        // defer_low((t_object*)x, (method)cue_subscribe, NULL, 0, 0);
        cue_subscribe(x); // actually in Pd this could cause an infinite loop...
    }
}

void cue_return_model_address(TTPtr self, t_symbol *msg, long argc, t_atom *argv)
{
    WrappedModularInstancePtr   x = (WrappedModularInstancePtr)self;
    TTAddress   absoluteAddress;
    
    if (argc && argv) {
        
        // set address attribute of the wrapped Receiver object
        absoluteAddress = TTAddress(atom_getsym(argv)->s_name).appendAddress(x->address);
        x->wrappedObject.set(kTTSym_address, absoluteAddress);
    }
}

// Method for Assistance Messages
void cue_assist(TTPtr self, void *b, long msg, long arg, char *dst)
{
    if (msg==1)         // Inlets
        strcpy(dst, "");        
    else {                          // Outlets
        switch(arg) {
            case line_out:
                strcpy(dst, "cue output");
                break;
            case dump_out:
                strcpy(dst, "dumpout");
                break;
        }
    }
}

void cue_return_value(TTPtr self, t_symbol *msg, long argc, t_atom *argv)
{
    WrappedModularInstancePtr   x = (WrappedModularInstancePtr)self;
    
    // avoid blank before line
    if (msg == _sym_nothing)
        outlet_anything((t_outlet*)x->outlets[line_out], _sym_nothing, argc, argv);
    else
        outlet_anything((t_outlet*)x->outlets[line_out], msg, argc, argv);
}

void cue_return_names(TTPtr self, t_symbol *msg, long argc, t_atom *argv)
{
    WrappedModularInstancePtr   x = (WrappedModularInstancePtr)self;
    outlet_anything((t_outlet*)x->outlets[dump_out], gensym("names"), argc, argv);
}

void cue_get(TTPtr self, t_symbol *msg, long argc, t_atom *argv)
{
    WrappedModularInstancePtr   x = (WrappedModularInstancePtr)self;
    TTHashPtr   allCues;
    TTValue     v;
    TTSymbol    name, attribute;
    TTObject    cue;
    long        ac = 0;
    t_atom      *av = NULL;
    
    if (argc == 2) {
        
        if (atom_gettype(argv) == A_SYM && atom_gettype(argv+1) == A_SYM) {
            
            attribute = TTSymbol((char*)atom_getsym(argv)->s_name);
            name = TTSymbol((char*)atom_getsym(argv+1)->s_name);
            
            // get cue object table
            x->wrappedObject.get("cues", v);
            allCues = TTHashPtr((TTPtr)v[0]);
            
            if (allCues) {
                
                // get cue
                if (!allCues->lookup(name, v)) {
                    
                    cue = v[0];
                    if (!cue.get(attribute, v)) {
                        
                        v.prepend(name);
                        jamoma_ttvalue_to_Atom(v, &ac, &av);
                        
                        outlet_anything((t_outlet*)x->dumpOut, atom_getsym(argv), ac, av);
                    }
                    else
                        pd_error((t_object*)x, "%s attribute doesn't exist", atom_getsym(argv)->s_name);
                }
                else
                    pd_error((t_object*)x, "%s cue doesn't exist", atom_getsym(argv+1)->s_name);
            }
        }
    }
}

void cue_set(TTPtr self, t_symbol *msg, long argc, t_atom *argv)
{
    WrappedModularInstancePtr   x = (WrappedModularInstancePtr)self;
    TTHashPtr   allCues;
    TTValue     v;
    TTSymbol    name, attribute;
    TTObject    cue;
    
    if (argc >= 2) {
        
        if (atom_gettype(argv) == A_SYM && atom_gettype(argv+1) == A_SYM) {
            
            attribute = TTSymbol((char*)atom_getsym(argv)->s_name);
            name = TTSymbol((char*)atom_getsym(argv+1)->s_name);
            
            // get cue object table
            x->wrappedObject.get("cues", v);
            allCues = TTHashPtr((TTPtr)v[0]);
            
            if (allCues) {
                
                // get cue
                if (!allCues->lookup(name, v)) {
                    
                    cue = v[0];
                    
                    // prepare value to set
                    jamoma_ttvalue_from_Atom(v, _sym_nothing, argc-2, argv+2);
                    
                    if (cue.set(attribute, v))
                        pd_error((t_object*)x, "%s attribute doesn't exist", atom_getsym(argv)->s_name);
                }
                else
                    pd_error((t_object*)x, "%s cue doesn't exist", atom_getsym(argv+1)->s_name);
            }
        }
    }
}

void cue_read(TTPtr self, t_symbol *msg, long argc, t_atom *argv)
{
    // defer(self, (method)cue_doread, msg, argc, argv);
    cue_doread(self,msg,argc,argv);
}

void cue_doread(TTPtr self, t_symbol *msg, long argc, t_atom *argv)
{   
    WrappedModularInstancePtr   x = (WrappedModularInstancePtr)self;
    TTValue         o, v, none;
    TTSymbol        fullpath;
    TTObject        aTextHandler;
    TTErr           tterr;
    
    if (x->wrappedObject.valid()) {
        
        fullpath = jamoma_file_read((t_object*)x, argc, argv, (t_fourcc)'TEXT');
        v.append(fullpath);
        
        tterr = x->internals->lookup(kTTSym_TextHandler, o);
        
        if (!tterr) {
            
            aTextHandler = o[0];

            aTextHandler.set(kTTSym_object, x->wrappedObject);
            
//          critical_enter(0);
            tterr = aTextHandler.send(kTTSym_Read, v, none);
//          critical_exit(0);
            
            if (!tterr)
                outlet_anything((t_outlet*)x->dumpOut, _sym_read, argc, argv);
            else
                outlet_anything((t_outlet*)x->dumpOut, _sym_error, 0, NULL);
        }
    }
}

void cue_read_again(TTPtr self)
{
    cue_doread(self,NULL,0,NULL);
    // defer(self, (method)cue_doread_again, NULL, 0, NULL);
}

void cue_doread_again(TTPtr self)
{   
    WrappedModularInstancePtr   x = (WrappedModularInstancePtr)self;
    TTValue     o, v, none;
    TTObject    aTextHandler;
    TTErr       tterr;
    
    if (x->wrappedObject.valid()) {
        
        tterr = x->internals->lookup(kTTSym_TextHandler, o);
        
        if (!tterr) {
            
            aTextHandler = o[0];

            aTextHandler.set(kTTSym_object, x->wrappedObject);
            
//          critical_enter(0);
            tterr = aTextHandler.send(kTTSym_ReadAgain, v, none);
//          critical_exit(0);
            
            if (!tterr)
                outlet_anything((t_outlet*)x->dumpOut, _sym_read, 0, NULL);
            else
                outlet_anything((t_outlet*)x->dumpOut, _sym_error, 0, NULL);
        }
    }
}

void cue_write(TTPtr self, t_symbol *msg, long argc, t_atom *argv)
{
//  defer(self, (method)cue_dowrite, msg, argc, argv);
    cue_dowrite(self, msg, argc, argv);
}

void cue_dowrite(TTPtr self, t_symbol *msg, long argc, t_atom *argv)
{
    WrappedModularInstancePtr   x = (WrappedModularInstancePtr)self;
    char            filename[MAX_FILENAME_CHARS];
    TTSymbol        fullpath;
    TTValue         o, v, none;
    TTObject        aTextHandler;
    TTErr           tterr;
    
    if (x->wrappedObject.valid()) {
        
        // Default TEXT File Name
        snprintf(filename, MAX_FILENAME_CHARS, "untitled.cues.txt");
        
        fullpath = jamoma_file_write((t_object*)x, argc, argv, filename);
        v.append(fullpath);
        
        tterr = x->internals->lookup(kTTSym_TextHandler, o);
        
        if (!tterr) {
            aTextHandler = o[0];

            aTextHandler.set(kTTSym_object, x->wrappedObject);
            
//          critical_enter(0);
            tterr = aTextHandler.send(kTTSym_Write, v, none);
//          critical_exit(0);
            
            if (!tterr)
                outlet_anything((t_outlet*) x->dumpOut, _sym_write, argc, argv);
            else
                outlet_anything((t_outlet*) x->dumpOut, _sym_error, 0, NULL);
        }
    }
}

void cue_write_again(TTPtr self)
{
//  defer(self, (method)cue_dowrite_again, NULL, 0, NULL);
    cue_dowrite(self,NULL,0,NULL);
}

void cue_dowrite_again(TTPtr self)
{   
    WrappedModularInstancePtr   x = (WrappedModularInstancePtr)self;
    TTValue         o, v, none;
    TTObject        aTextHandler;
    TTErr           tterr;
    
    if (x->wrappedObject.valid()) {
        
        tterr = x->internals->lookup(kTTSym_TextHandler, o);
        
        if (!tterr) {
            
            aTextHandler = o[0];

            aTextHandler.set(kTTSym_object, x->wrappedObject);
            
//          critical_enter(0);
            tterr = aTextHandler.send(kTTSym_WriteAgain, v, none);
//          critical_exit(0);
            
            if (!tterr)
                outlet_anything((t_outlet*)x->dumpOut, _sym_write, 0, NULL);
            else
                outlet_anything((t_outlet*)x->dumpOut, _sym_error, 0, NULL);
        }
    }
}

void cue_dorecall(TTPtr self, t_symbol *msg, long argc, t_atom *argv)
{
    WrappedModularInstancePtr   x = (WrappedModularInstancePtr)self;
    TTValue         v, none;
    TTNodePtr       contextNode;
    TTObject        o;
    TTBoolean       initialized;
    
    if (argc && argv) {
        if (atom_gettype(argv) == A_SYM) {
            
            x->wrappedObject.send(kTTSym_Recall, TTSymbol(atom_getsym(argv)), none);
        }
        
        // Check Context Node
        if (x->subscriberObject.valid()) {
            
            x->subscriberObject.get("contextNode", v);
            contextNode = TTNodePtr((TTPtr)v[0]);
            
            // If it is a none initialized Container : initialize it
            o = contextNode->getObject();
            if (o.valid()) {
                
                if (o.name() == kTTSym_Container) {
                    
                    o.get(kTTSym_initialized, v);
                    initialized = v[0];
                    
                    if (!initialized)
                        o.send(kTTSym_Init);
                }
            }
        }
    }
}

void cue_edit(TTPtr self, t_symbol *msg, long argc, t_atom *argv)
{
    WrappedModularInstancePtr   x = (WrappedModularInstancePtr)self;
    TTString            *buffer;
    char                title[MAX_FILENAME_CHARS];
    TTObject            aTextHandler;
    TTHashPtr           allCues;
    TTValue             v, o, none;
    TTSymbol            name = kTTSymEmpty;
    t_atom              a;
    TTErr               tterr;
    
    // choose object to edit : default the cuelist
    *EXTRA->toEdit = x->wrappedObject;
    EXTRA->cueName = kTTSymEmpty;
    
    if (argc && argv)
    {
        if (atom_gettype(argv) == A_LONG)
        {
            TTUInt32 index = atom_getlong(argv);
            
            // get cues names
            x->wrappedObject.get("names", v);
            
            if (index > 0 && index <= v.size())
                v.get(index-1, name);
            else
            {
                pd_error((t_object*)x, "%ld doesn't exist", atom_getlong(argv));
                return;
            }
        }
        else if (atom_gettype(argv) == A_SYM)
            name = TTSymbol(atom_getsym(argv)->s_name);
        
        if (name != kTTSymEmpty)
        {
            // get cue object table
            x->wrappedObject.get("cues", v);
            allCues = TTHashPtr((TTPtr)v[0]);
            
            if (allCues)
            {
                // get cue to edit
                if (!allCues->lookup(name, v))
                {
                    // edit a cue
                    *EXTRA->toEdit = v[0];
                    EXTRA->cueName = name;
                }
                else
                {
                    pd_error((t_object*)x, "%s doesn't exist", atom_getsym(argv)->s_name);
                    return;
                }
            }
        }
    }
    
    /* TODO add an editor to Pd
    // only one editor can be open in the same time
    if (!EXTRA->textEditor) {
        
        EXTRA->textEditor = (t_object*)object_new(_sym_nobox, _sym_jed, x, 0);
        
        buffer = new TTString();
        
        // get the buffer handler
        tterr = x->internals->lookup(kTTSym_TextHandler, o);
        
        if (!tterr) {
            
            aTextHandler = o[0];
            
            critical_enter(0);
            aTextHandler.set(kTTSym_object, *EXTRA->toEdit);
            tterr = aTextHandler.send(kTTSym_Write, (TTPtr)buffer, none);
            critical_exit(0);
        }
        
        // pass the buffer to the editor
        object_method(EXTRA->textEditor, _sym_settext, buffer->c_str(), _sym_utf_8);
        object_attr_setchar(EXTRA->textEditor, gensym("scratch"), 1);
        
        snprintf(title, MAX_FILENAME_CHARS, "cuelist editor");
        object_attr_setsym(EXTRA->textEditor, _sym_title, gensym(title));
        
        // output a flag
        atom_setsym(&a, gensym("opened"));
        outlet_anything((t_outlet*)x->dumpOut, gensym("editor"), 1, &a);
        
        buffer->clear();
        delete buffer;
        buffer = NULL;
    }
    */
}

void cue_edclose(TTPtr self, char **text, long size)
{
    WrappedModularInstancePtr   x = (WrappedModularInstancePtr)self;
    
    EXTRA->text = new TTString(*text);
    EXTRA->textEditor = NULL;
    
    cue_doedit(x);
//  defer_low((t_object*)x, (method)cue_doedit, NULL, 0, NULL);
}

void cue_doedit(TTPtr self)
{
    WrappedModularInstancePtr   x = (WrappedModularInstancePtr)self;
    TTObject    aTextHandler;
    TTValue     o, args, none;
    t_atom      a;
    TTErr       tterr;
    
    // get the buffer handler
    tterr = x->internals->lookup(kTTSym_TextHandler, o);
    
    if (!tterr) {
        
        aTextHandler = o[0];
        
//      critical_enter(0);
        tterr = aTextHandler.send(kTTSym_Read, (TTPtr)EXTRA->text, none);
//      critical_exit(0);
        
        // output a flag
        atom_setsym(&a, gensym("closed"));
        outlet_anything((t_outlet*)x->dumpOut, gensym("editor"), 1, &a);
        
        if (tterr)
            outlet_anything((t_outlet*)x->dumpOut, _sym_error, 0, NULL);
    }
    
    delete EXTRA->text;
    EXTRA->text = NULL;
    EXTRA->textEditor = NULL;
    *EXTRA->toEdit = x->wrappedObject;
    EXTRA->cueName = kTTSymEmpty;
}

t_max_err cue_get_relative(TTPtr self, TTPtr attr, long *ac, t_atom **av)
{
    WrappedModularInstancePtr   x = (WrappedModularInstancePtr)self;
    
    if ((*ac)&&(*av)) {
        //memory passed in, use it
    } else {
        //otherwise allocate memory
        *ac = 1;
        if (!(*av = (t_atom*)getbytes(sizeof(t_atom)*(*ac)))) {
            *ac = 0;
            return -4; // MAX_ERR_OUT_OF_MEM;
        }
    }
    
    atom_setlong(*av, x->index);
    
    return 0; // MAX_ERR_NONE;
}

t_max_err cue_set_relative(TTPtr self, TTPtr attr, long ac, t_atom *av)
{
    WrappedModularInstancePtr   x = (WrappedModularInstancePtr)self;
    
    if (ac&&av) {
        x->index = atom_getlong(av);
        
        if (x->index) {
            // The following must be deferred because we have to interrogate our box,
            // and our box is not yet valid until we have finished instantiating the object.
            // Trying to use a loadbang method instead is also not fully successful (as of Max 5.0.6)
            cue_subscribe(x);
//          defer_low((t_object*)x, (method)cue_subscribe, NULL, 0, 0);
        }
        
    } else {
        // no args
        x->index = 0;
    }
    return 0; // MAX_ERR_NONE;
}