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#include <stdio.h>
#include <string.h>
#include <m_pd.h>
#include "g_canvas.h"
#define DEBUG(x)
static t_class *canvas_name_class;
typedef struct _canvas_name
{
t_object x_obj;
t_canvas *x_canvas;
t_symbol *receive_name;
t_int depth;
} t_canvas_name;
static t_symbol* make_canvas_symbol(t_canvas* canvas)
{
char buf[MAXPDSTRING];
snprintf(buf, MAXPDSTRING, ".x%lx.c", (long unsigned int)canvas);
return gensym(buf);
}
static t_symbol* get_canvas_by_depth(t_canvas_name *x)
{
t_canvas *canvas = x->x_canvas;
int depth = x->depth;
if(depth<0)depth=0;
while(depth && canvas)
{
canvas = canvas->gl_owner;
depth--;
}
return make_canvas_symbol(canvas);
}
static t_symbol* get_canvas_by_name(t_canvas_name *x)
{
return make_canvas_symbol((t_canvas *)pd_findbyclass(x->receive_name, canvas_class));
}
static t_symbol* get_canvas_name(t_canvas_name *x)
{
if(x->receive_name == &s_)
return get_canvas_by_depth(x);
else
return get_canvas_by_name(x);
}
static void canvas_name_bang(t_canvas_name *x)
{
/* actually get the canvas name each time to make sure we get
* accurate info in case of changes. If we cache the result, a
* canvas could have been deleted or renamed. */
outlet_symbol(x->x_obj.ob_outlet, get_canvas_name(x));
}
static void canvas_name_anything(t_canvas_name *x, t_symbol *s, int argc, t_atom *argv)
{
t_symbol *first_symbol = atom_getsymbolarg(0,argc,argv);
x->depth = 0;
x->receive_name = &s_;
if(s == &s_float)
x->depth = (t_int) atom_getfloatarg(0,argc,argv);
else if (first_symbol == &s_)
x->receive_name = s;
else
x->receive_name = first_symbol;
canvas_name_bang(x);
}
static void *canvas_name_new(t_symbol *s, int argc, t_atom *argv)
{
t_canvas_name *x = (t_canvas_name *)pd_new(canvas_name_class);
t_glist* glist = (t_glist *)canvas_getcurrent();
x->x_canvas = (t_canvas *)glist_getcanvas(glist);
t_symbol *tmp = atom_getsymbolarg(0,argc,argv);
x->depth = 0;
x->receive_name = &s_;
if(tmp == &s_)
x->depth = (t_int) atom_getfloatarg(0,argc,argv);
else
x->receive_name = tmp;
outlet_new(&x->x_obj, &s_symbol);
return(x);
}
void canvas_name_setup(void)
{
canvas_name_class = class_new(gensym("canvas_name"),
(t_newmethod)canvas_name_new, NULL,
sizeof(t_canvas_name), 0, A_GIMME, 0);
class_addbang(canvas_name_class, (t_method)canvas_name_bang);
class_addanything(canvas_name_class, (t_method)canvas_name_anything);
}
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