/* Copyright (c) 1997-1999 Miller Puckette.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution.  */

/* changes by Thomas Musil IEM KUG Graz Austria 2001 */
/* the methods for calling the gui-objects from menu are implemented */
/* all changes are labeled with      iemlib      */

#include <stdlib.h>
#include "m_pd.h"
#include "m_imp.h"

#include "g_canvas.h"
#include <stdio.h>
#include <string.h>
#include <math.h>

#include "g_undo.h"

/* borrowed from RMARGIN and BMARGIN in g_rtext.c */
#define ATOM_RMARGIN 2 /* 2 pixels smaller than object LMARGIN + RMARGIN */
#define ATOM_BMARGIN 4 /* 1 pixel smaller than object TMARGIN+BMARGIN */

#define MESSAGE_CLICK_WIDTH 5

t_class *text_class;
static t_class *message_class;
static t_class *gatom_class;
static void text_vis(t_gobj *z, t_glist *glist, int vis);
static void text_displace(t_gobj *z, t_glist *glist,
    int dx, int dy);
static void text_getrect(t_gobj *z, t_glist *glist,
    int *xp1, int *yp1, int *xp2, int *yp2);

void canvas_startmotion(t_canvas *x);
int glist_getindex(t_glist *x, t_gobj *y);
void gatom_undarken(t_text *x);

static void glist_nograb(t_glist *x)
{
    if (x->gl_editor)
    {
        t_canvas *canvas = glist_getcanvas(x);
        t_object *ob;
        t_gobj*g;
        for (g = canvas->gl_list; g; g = g->g_next)
            if ((ob = pd_checkobject(&g->g_pd)) && T_ATOM == ob->te_type)
                gatom_undarken(ob);
        x->gl_editor->e_grab = 0;
    }
}

/* ----------------- the "text" object.  ------------------ */

    /* add a "text" object (comment) to a glist.  Called without args
    if invoked from the GUI; otherwise at least x and y are provided.  */

void glist_text(t_glist *gl, t_symbol *s, int argc, t_atom *argv)
{
    t_text *x = (t_text *)pd_new(text_class);
    t_atom at;
    x->te_width = 0;                            /* don't know it yet. */
    x->te_type = T_TEXT;
    x->te_binbuf = binbuf_new();
    if (argc > 1)
    {
        x->te_xpix = atom_getfloatarg(0, argc, argv);
        x->te_ypix = atom_getfloatarg(1, argc, argv);
        if (argc > 2) binbuf_restore(x->te_binbuf, argc-2, argv+2);
        else
        {
            SETSYMBOL(&at, gensym("comment"));
            binbuf_restore(x->te_binbuf, 1, &at);
        }
        glist_add(gl, &x->te_g);
    }
    else
    {
        int xpix, ypix;
        pd_vmess((t_pd *)glist_getcanvas(gl), gensym("editmode"), "i", 1);
        SETSYMBOL(&at, gensym("comment"));
        glist_noselect(gl);
        glist_nograb(gl);
        glist_getnextxy(gl, &xpix, &ypix);
        x->te_xpix = xpix/gl->gl_zoom - 1;
        x->te_ypix = ypix/gl->gl_zoom - 1;
        binbuf_restore(x->te_binbuf, 1, &at);
        glist_add(gl, &x->te_g);
        glist_noselect(gl);
        glist_select(gl, &x->te_g);
            /* it would be nice to "activate" here, but then the second,
            "put-me-down" click changes the text selection, which is quite
            irritating, so I took this back out.  It's OK in messages
            and objects though since there's no text in them at menu
            creation. */
            /* gobj_activate(&x->te_g, gl, 1); */
        if (!canvas_undo_get(glist_getcanvas(gl))->u_doing)
            canvas_undo_add(glist_getcanvas(gl), UNDO_CREATE, "create",
                (void *)canvas_undo_set_create(glist_getcanvas(gl)));
        canvas_startmotion(glist_getcanvas(gl));
    }
}

/* ----------------- the "object" object.  ------------------ */

void canvas_getargs(int *argcp, t_atom **argvp);

static void canvas_error_couldntcreate(void*x, t_binbuf*b, const char*errmsg)
{
    char *buf=0;
    int bufsize=0;
    if (!binbuf_getnatom(b))
        return;
    binbuf_gettext(b, &buf, &bufsize);
    buf = resizebytes(buf, bufsize, bufsize+1);
    buf[bufsize] = 0;
    logpost(x, PD_CRITICAL, "%s", buf);
    logpost(x, PD_ERROR, "%s", errmsg);
    freebytes(buf, bufsize);
}

static void canvas_objtext(t_glist *gl, int xpix, int ypix, int width,
    int selected, t_binbuf *b)
{
    t_text *x;
    int argc;
    t_atom *argv;
    pd_this->pd_newest = 0;
    canvas_setcurrent((t_canvas *)gl);
    canvas_getargs(&argc, &argv);
    binbuf_eval(b, &pd_objectmaker, argc, argv);
    if (binbuf_getnatom(b))
    {
        if (!pd_this->pd_newest)
            x = 0;
        else if (!(x = pd_checkobject(pd_this->pd_newest)))
        {
            canvas_error_couldntcreate(0, b, "... didn't return a patchable object");
        }
    }
    else x = 0;
    if (!x)
    {
        x = (t_text *)pd_new(text_class);
        canvas_error_couldntcreate(x, b, "... couldn't create");
    }
    x->te_binbuf = b;
    x->te_xpix = xpix;
    x->te_ypix = ypix;
    x->te_width = width;
    x->te_type = T_OBJECT;
    glist_add(gl, &x->te_g);
    if (selected)
    {
            /* this is called if we've been created from the menu. */
        glist_select(gl, &x->te_g);
        gobj_activate(&x->te_g, gl, 1);
    }
    if (pd_class(&x->ob_pd) == vinlet_class)
        canvas_resortinlets(glist_getcanvas(gl));
    if (pd_class(&x->ob_pd) == voutlet_class)
        canvas_resortoutlets(glist_getcanvas(gl));
    canvas_unsetcurrent((t_canvas *)gl);
}

extern int sys_noautopatch;
    /* utility routine to figure out where to put a new text box from menu
    and whether to connect to it automatically */
static void canvas_howputnew(t_canvas *x, int *connectp, int *xpixp, int *ypixp,
    int *indexp, int *totalp)
{
    float dx = 5.5 * x->gl_zoom;
    int xpix, ypix, indx = 0, nobj = 0, n2, x1, x2, y1, y2;
    int connectme = (x->gl_editor->e_selection &&
        !x->gl_editor->e_selection->sel_next && !sys_noautopatch);
    glist_nograb(x);
    if (connectme)
    {
        t_gobj *g, *selected = x->gl_editor->e_selection->sel_what;
            /* get number of objects */
        for (g = x->gl_list, nobj = 0; g; g = g->g_next, nobj++) ;

            /* deselect the current selection (and create pending objects) */
        glist_noselect(x);

            /* search back for 'selected' and if it isn't on the list,
                plan just to connect from the last item on the list. */
        for (g = x->gl_list, n2 = 0; g; g = g->g_next, n2++)
        {
            if (g == selected)
            {
                indx = n2;
                break;
            }
            else if (!g->g_next) {
                    /* we couldn't find the selected object any more
                     * this probably means, that it was replaced by a newly
                     * created object, which is now the last on the list.
                     */
                indx = nobj-1;
                break;
            }
        }
            /* so where do we put the new object?
               just below the one we connect from! */
        if(g) {
            gobj_getrect(g, x, &x1, &y1, &x2, &y2);
            *xpixp = x1 / x->gl_zoom;
            *ypixp = (y2+dx) / x->gl_zoom;  /* 5 pixels down, rounded */
        } else {
                /* just in case */
            glist_getnextxy(x, xpixp, ypixp);
            *xpixp = *xpixp/x->gl_zoom - 3;
            *ypixp = *ypixp/x->gl_zoom - 3;
        }
    }
    else
    {
        glist_getnextxy(x, xpixp, ypixp);
        *xpixp = *xpixp/x->gl_zoom - 3;
        *ypixp = *ypixp/x->gl_zoom - 3;
        glist_noselect(x);
    }
    *connectp = connectme;
    *indexp = indx;
    *totalp = nobj;
}

    /* object creation routine.  These are called without any arguments if
    they're invoked from the gui; when pasting or restoring from a file, we
    get at least x and y. */

void canvas_obj(t_glist *gl, t_symbol *s, int argc, t_atom *argv)
{
    t_text *x;
    if (argc >= 2)
    {
        t_binbuf *b = binbuf_new();
        binbuf_restore(b, argc-2, argv+2);
        canvas_objtext(gl, atom_getfloatarg(0, argc, argv),
            atom_getfloatarg(1, argc, argv), 0, 0, b);
    }
        /* JMZ: don't go into interactive mode in a closed canvas */
    else if (!glist_isvisible(gl))
        post("unable to create stub object in closed canvas!");
    else
    {
            /* interactively create new object */
        t_binbuf *b = binbuf_new();
        int connectme, xpix, ypix, indx, nobj;
        canvas_howputnew(gl, &connectme, &xpix, &ypix, &indx, &nobj);
        pd_vmess(&gl->gl_pd, gensym("editmode"), "i", 1);
        canvas_objtext(gl, xpix, ypix, 0, 1, b);
        if (connectme)
            canvas_connect(gl, indx, 0, nobj, 0);
        else canvas_startmotion(glist_getcanvas(gl));
        if (!canvas_undo_get(glist_getcanvas(gl))->u_doing)
            canvas_undo_add(glist_getcanvas(gl), UNDO_CREATE, "create",
                (void *)canvas_undo_set_create(glist_getcanvas(gl)));
    }
}

/* make an object box for an object that's already there. */

/* iemlib */
void canvas_iemguis(t_glist *gl, t_symbol *guiobjname)
{
    t_atom at;
    t_binbuf *b = binbuf_new();

    int connectme, xpix, ypix, indx, nobj;
    canvas_howputnew(gl, &connectme, &xpix, &ypix, &indx, &nobj);

    pd_vmess(&gl->gl_pd, gensym("editmode"), "i", 1);

    glist_noselect(gl);
    SETSYMBOL(&at, guiobjname);
    binbuf_restore(b, 1, &at);

    canvas_objtext(gl, xpix/gl->gl_zoom, ypix/gl->gl_zoom, 0, 1, b);
    if(connectme)
        canvas_connect(gl, indx, 0, nobj, 0);
    else canvas_startmotion(glist_getcanvas(gl));
    canvas_undo_add(glist_getcanvas(gl), UNDO_CREATE, "create",
        (void *)canvas_undo_set_create(glist_getcanvas(gl)));
}

void canvas_bng(t_glist *gl, t_symbol *s, int argc, t_atom *argv)
{
    canvas_iemguis(gl, gensym("bng"));
}

void canvas_toggle(t_glist *gl, t_symbol *s, int argc, t_atom *argv)
{
    canvas_iemguis(gl, gensym("tgl"));
}

void canvas_vslider(t_glist *gl, t_symbol *s, int argc, t_atom *argv)
{
    canvas_iemguis(gl, gensym("vsl"));
}

void canvas_hslider(t_glist *gl, t_symbol *s, int argc, t_atom *argv)
{
    canvas_iemguis(gl, gensym("hsl"));
}

void canvas_hdial(t_glist *gl, t_symbol *s, int argc, t_atom *argv)
{
    canvas_iemguis(gl, gensym("hdl"));
}

void canvas_vdial(t_glist *gl, t_symbol *s, int argc, t_atom *argv)
{
    canvas_iemguis(gl, gensym("vdl"));
}

void canvas_hradio(t_glist *gl, t_symbol *s, int argc, t_atom *argv)
{
    canvas_iemguis(gl, gensym("hradio"));
}

void canvas_vradio(t_glist *gl, t_symbol *s, int argc, t_atom *argv)
{
    canvas_iemguis(gl, gensym("vradio"));
}

void canvas_vumeter(t_glist *gl, t_symbol *s, int argc, t_atom *argv)
{
    canvas_iemguis(gl, gensym("vu"));
}

void canvas_mycnv(t_glist *gl, t_symbol *s, int argc, t_atom *argv)
{
    canvas_iemguis(gl, gensym("cnv"));
}

void canvas_numbox(t_glist *gl, t_symbol *s, int argc, t_atom *argv)
{
    canvas_iemguis(gl, gensym("nbx"));
}

/* iemlib */

void canvas_objfor(t_glist *gl, t_text *x, int argc, t_atom *argv)
{
    x->te_width = 0;                            /* don't know it yet. */
    x->te_type = T_OBJECT;
    x->te_binbuf = binbuf_new();
    x->te_xpix = atom_getfloatarg(0, argc, argv);
    x->te_ypix = atom_getfloatarg(1, argc, argv);
    if (argc > 2) binbuf_restore(x->te_binbuf, argc-2, argv+2);
    glist_add(gl, &x->te_g);
}

/* ---------------------- the "message" text item ------------------------ */

typedef struct _messresponder
{
    t_pd mr_pd;
    t_outlet *mr_outlet;
} t_messresponder;

typedef struct _message
{
    t_text m_text;
    t_messresponder m_messresponder;
    t_glist *m_glist;
    t_clock *m_clock;
} t_message;

static t_class *messresponder_class;

static void messresponder_bang(t_messresponder *x)
{
    outlet_bang(x->mr_outlet);
}

static void messresponder_float(t_messresponder *x, t_float f)
{
    outlet_float(x->mr_outlet, f);
}

static void messresponder_symbol(t_messresponder *x, t_symbol *s)
{
    outlet_symbol(x->mr_outlet, s);
}

static void messresponder_list(t_messresponder *x,
    t_symbol *s, int argc, t_atom *argv)
{
    outlet_list(x->mr_outlet, s, argc, argv);
}

static void messresponder_anything(t_messresponder *x,
    t_symbol *s, int argc, t_atom *argv)
{
    outlet_anything(x->mr_outlet, s, argc, argv);
}

static void message_bang(t_message *x)
{
    binbuf_eval(x->m_text.te_binbuf, &x->m_messresponder.mr_pd, 0, 0);
}

static void message_float(t_message *x, t_float f)
{
    t_atom at;
    SETFLOAT(&at, f);
    binbuf_eval(x->m_text.te_binbuf, &x->m_messresponder.mr_pd, 1, &at);
}

static void message_symbol(t_message *x, t_symbol *s)
{
    t_atom at;
    SETSYMBOL(&at, s);
    binbuf_eval(x->m_text.te_binbuf, &x->m_messresponder.mr_pd, 1, &at);
}

static void message_list(t_message *x, t_symbol *s, int argc, t_atom *argv)
{
    binbuf_eval(x->m_text.te_binbuf, &x->m_messresponder.mr_pd, argc, argv);
}

static void message_set(t_message *x, t_symbol *s, int argc, t_atom *argv)
{
    binbuf_clear(x->m_text.te_binbuf);
    binbuf_add(x->m_text.te_binbuf, argc, argv);
    glist_retext(x->m_glist, &x->m_text);
}

static void message_add2(t_message *x, t_symbol *s, int argc, t_atom *argv)
{
    binbuf_add(x->m_text.te_binbuf, argc, argv);
    glist_retext(x->m_glist, &x->m_text);
}

static void message_add(t_message *x, t_symbol *s, int argc, t_atom *argv)
{
    binbuf_add(x->m_text.te_binbuf, argc, argv);
    binbuf_addsemi(x->m_text.te_binbuf);
    glist_retext(x->m_glist, &x->m_text);
}

static void message_addcomma(t_message *x)
{
    t_atom a;
    SETCOMMA(&a);
    binbuf_add(x->m_text.te_binbuf, 1, &a);
    glist_retext(x->m_glist, &x->m_text);
}

static void message_addsemi(t_message *x)
{
    message_add(x, 0, 0, 0);
}

static void message_adddollar(t_message *x, t_floatarg f)
{
    t_atom a;
    int n = f;
    if (n < 0)
        n = 0;
    SETDOLLAR(&a, n);
    binbuf_add(x->m_text.te_binbuf, 1, &a);
    glist_retext(x->m_glist, &x->m_text);
}

static void message_adddollsym(t_message *x, t_symbol *s)
{
    t_atom a;
    char buf[MAXPDSTRING];
    buf[0] = '$';
    strncpy(buf+1, s->s_name, MAXPDSTRING-2);
    buf[MAXPDSTRING-1] = 0;
    SETDOLLSYM(&a, gensym(buf));
    binbuf_add(x->m_text.te_binbuf, 1, &a);
    glist_retext(x->m_glist, &x->m_text);
}

static void message_click(t_message *x,
    t_floatarg xpos, t_floatarg ypos, t_floatarg shift,
        t_floatarg ctrl, t_floatarg alt)
{
    if (glist_isvisible(x->m_glist))
    {
        /* not zooming click width for now as it gets too fat */
        t_rtext *y = glist_findrtext(x->m_glist, &x->m_text);
        char buf[MAXPDSTRING];
        sprintf(buf, "%sR", rtext_gettag(y));
        pdgui_vmess(0, "crs ri",
            glist_getcanvas(x->m_glist),
            "itemconfigure",
            buf,
            "-width", MESSAGE_CLICK_WIDTH);
        clock_delay(x->m_clock, 120);
    }
    message_float(x, 0);
}

static void message_tick(t_message *x)
{
    if (glist_isvisible(x->m_glist))
    {
        t_rtext *y = glist_findrtext(x->m_glist, &x->m_text);
        char buf[MAXPDSTRING];
        sprintf(buf, "%sR", rtext_gettag(y));
        pdgui_vmess(0, "crs ri",
            glist_getcanvas(x->m_glist),
            "itemconfigure",
            buf,
            "-width", glist_getzoom(x->m_glist));
    }
}

static void message_free(t_message *x)
{
    clock_free(x->m_clock);
}

void canvas_msg(t_glist *gl, t_symbol *s, int argc, t_atom *argv)
{
    t_message *x = (t_message *)pd_new(message_class);
    x->m_messresponder.mr_pd = messresponder_class;
    x->m_messresponder.mr_outlet = outlet_new(&x->m_text, &s_float);
    x->m_text.te_width = 0;                             /* don't know it yet. */
    x->m_text.te_type = T_MESSAGE;
    x->m_text.te_binbuf = binbuf_new();
    x->m_glist = gl;
    x->m_clock = clock_new(x, (t_method)message_tick);
    if (argc > 1)
    {
        x->m_text.te_xpix = atom_getfloatarg(0, argc, argv);
        x->m_text.te_ypix = atom_getfloatarg(1, argc, argv);
        if (argc > 2) binbuf_restore(x->m_text.te_binbuf, argc-2, argv+2);
        glist_add(gl, &x->m_text.te_g);
    }
    else if (!glist_isvisible(gl))
        post("unable to create stub message in closed canvas!");
    else
    {
        int connectme, xpix, ypix, indx, nobj;
        canvas_howputnew(gl, &connectme, &xpix, &ypix, &indx, &nobj);

        pd_vmess(&gl->gl_pd, gensym("editmode"), "i", 1);
        x->m_text.te_xpix = xpix;
        x->m_text.te_ypix = ypix;
        glist_add(gl, &x->m_text.te_g);
        glist_noselect(gl);
        glist_select(gl, &x->m_text.te_g);
        gobj_activate(&x->m_text.te_g, gl, 1);
        if (connectme)
            canvas_connect(gl, indx, 0, nobj, 0);
        else canvas_startmotion(glist_getcanvas(gl));
        canvas_undo_add(glist_getcanvas(gl), UNDO_CREATE, "create",
            (void *)canvas_undo_set_create(glist_getcanvas(gl)));
    }
}

    /* for the needs of g_editor::glist_dofinderror() */
t_pd *message_get_responder(t_gobj *x)
{
    if (pd_class(&x->g_pd) != message_class) return NULL;
    else return (t_pd *)&((t_message *)x)->m_messresponder.mr_pd;
}

/* ---------------------- the "atom" text item ------------------------ */

#define ATOM_LABELLEFT 0
#define ATOM_LABELRIGHT 1
#define ATOM_LABELUP 2
#define ATOM_LABELDOWN 3
#define A_LIST A_NULL /* fake atom type - use A_NULL for list 'flavor' */

typedef struct _gatom
{
    t_text a_text;
    int a_flavor;           /* A_FLOAT, A_SYMBOL, or A_LIST */
    t_glist *a_glist;       /* owning glist */
    t_float a_toggle;       /* value to toggle to */
    t_float a_draghi;       /* high end of drag range */
    t_float a_draglo;       /* low end of drag range */
    t_symbol *a_label;      /* symbol to show as label next to box */
    t_symbol *a_symfrom;    /* "receive" name -- bind ourselves to this */
    t_symbol *a_symto;      /* "send" name -- send to this on output */
    t_binbuf *a_revertbuf;  /* binbuf to revert to if typing canceled */
    int a_dragindex;        /* index of atom being dragged */
    int a_fontsize;
    unsigned int a_shift:1;         /* was shift key down when drag started? */
    unsigned int a_wherelabel:2;    /* 0-3 for left, right, above, below */
    unsigned int a_grabbed:1;       /* 1 if we've grabbed keyboard */
    unsigned int a_doubleclicked:1; /* 1 if dragging from a double click */
    t_symbol *a_expanded_to; /* a_symto after $0, $1, ...  expansion */
} t_gatom;

    /* prepend "-" as necessary to avoid empty strings, so we can
    use them in Pd messages. */
static t_symbol *gatom_escapit(t_symbol *s)
{
    if (!*s->s_name)
        return (gensym("-"));
    else if (*s->s_name == '-')
    {
        char shmo[100];
        shmo[0] = '-';
        strncpy(shmo+1, s->s_name, 99);
        shmo[99] = 0;
        return (gensym(shmo));
    }
    else return (s);
}

    /* undo previous operation: strip leading "-" if found.  This is used
    both to restore send, etc, names when loading from a file, and to
    set them from the properties dialog.  In the former case, since before
    version 0.52 '$" was aliases to "#", we also bash any "#" characters
    to "$".  This is unnecessary when reading files saved from 0.52 or later,
    and really we should test for that and only bash when necessary, just
    in case someone wants to have a "#" in a name. */
static t_symbol *gatom_unescapit(t_symbol *s)
{
    if (*s->s_name == '-')
        return (gensym(s->s_name+1));
    else return (iemgui_raute2dollar(s));
}

static void gatom_redraw(t_gobj *client, t_glist *glist)
{
    t_gatom *x = (t_gatom *)client;
    if (glist->gl_editor)
        glist_retext(x->a_glist, &x->a_text);
}

static void gatom_senditup(t_gatom *x)
{
    if (x->a_glist->gl_editor
        && gobj_shouldvis(&x->a_text.te_g, x->a_glist))
            sys_queuegui(x, x->a_glist, gatom_redraw);
}

static t_atom *gatom_getatom(t_gatom *x)
{
    int ac = binbuf_getnatom(x->a_text.te_binbuf);
    t_atom *av = binbuf_getvec(x->a_text.te_binbuf);
    if (x->a_flavor == A_FLOAT && (ac != 1 || av[0].a_type != A_FLOAT))
    {
        binbuf_clear(x->a_text.te_binbuf);
        binbuf_addv(x->a_text.te_binbuf, "f", 0.);
    }
    else if (x->a_flavor == A_SYMBOL && (ac != 1 || av[0].a_type != A_SYMBOL))
    {
        binbuf_clear(x->a_text.te_binbuf);
        binbuf_addv(x->a_text.te_binbuf, "s", &s_);
    }
    return (binbuf_getvec(x->a_text.te_binbuf));
}

static void gatom_set(t_gatom *x, t_symbol *s, int argc, t_atom *argv)
{
    t_atom *ap = gatom_getatom(x), oldatom;
    int changed = 0;
    if (!argc && x->a_flavor != A_LIST)
        return;
    if (x->a_flavor == A_FLOAT)
    {
        oldatom = *ap;
        ap->a_w.w_float = atom_getfloat(argv);
            /* github PR 791 by Dan Bornstein: treat "-0" as different from
            "0" and deal with NaNfoo all in one swipe by comparing bitwise: */
        changed = memcmp(&ap->a_w.w_float, &oldatom.a_w.w_float,
            sizeof(t_float));
    }
    else if (x->a_flavor == A_SYMBOL)
    {
        oldatom = *ap;
        ap->a_w.w_symbol = atom_getsymbol(argv),
            changed = (ap->a_w.w_symbol != oldatom.a_w.w_symbol);
    }
    else if (x->a_flavor == A_LIST)     /* list */
    {
        t_atom *av = binbuf_getvec(x->a_text.te_binbuf);
        int ac = binbuf_getnatom(x->a_text.te_binbuf), i;
        if (ac == argc)
        {
            for (i = 0; i < argc; i++)
                if ((argv[i].a_type != av[i].a_type) ||
                (argv[i].a_type == A_FLOAT &&
                     argv[i].a_w.w_float != av[i].a_w.w_float) ||
                (argv[i].a_type == A_SYMBOL &&
                    argv[i].a_w.w_symbol != av[i].a_w.w_symbol))
                        break;
            if (i == argc)
                goto nochange;
        }
            binbuf_clear(x->a_text.te_binbuf);
            binbuf_add(x->a_text.te_binbuf, argc, argv);
            av = binbuf_getvec(x->a_text.te_binbuf);
            for (i = 0; i < argc; i++)
                if (argv[i].a_type == A_POINTER)
                    SETSYMBOL(&argv[i], gensym("(pointer)"));
            changed = 1;
    }
    if (changed)
        gatom_senditup(x);
nochange: ;
}

static void gatom_bang(t_gatom *x)
{
    t_atom *ap = gatom_getatom(x);
    if (x->a_flavor == A_FLOAT)
    {
        if (x->a_text.te_outlet)
            outlet_float(x->a_text.te_outlet, ap->a_w.w_float);
        if (*x->a_expanded_to->s_name && x->a_expanded_to->s_thing)
        {
            if (x->a_symto == x->a_symfrom)
                pd_error(x,
                    "%s: atom with same send/receive name (infinite loop)",
                        x->a_symto->s_name);
            else pd_float(x->a_expanded_to->s_thing, ap->a_w.w_float);
        }
    }
    else if (x->a_flavor == A_SYMBOL)
    {
        if (x->a_text.te_outlet)
            outlet_symbol(x->a_text.te_outlet, ap->a_w.w_symbol);
        if (*x->a_symto->s_name && x->a_expanded_to->s_thing)
        {
            if (x->a_symto == x->a_symfrom)
                pd_error(x,
                    "%s: atom with same send/receive name (infinite loop)",
                        x->a_symto->s_name);
            else pd_symbol(x->a_expanded_to->s_thing, ap->a_w.w_symbol);
        }
    }
    else    /* list */
    {
        int argc = binbuf_getnatom(x->a_text.te_binbuf), i;
        t_atom *argv = binbuf_getvec(x->a_text.te_binbuf);
        for (i = 0; i < argc; i++)
            if (argv[i].a_type != A_FLOAT && argv[i].a_type != A_SYMBOL)
        {
            pd_error(x, "list: only sends literal numbers and symbols");
            return;
        }
        if (x->a_text.te_outlet)
            outlet_list(x->a_text.te_outlet, &s_list, argc, argv);
        if (*x->a_expanded_to->s_name && x->a_expanded_to->s_thing)
        {
            if (x->a_symto == x->a_symfrom)
                pd_error(x,
                    "%s: atom with same send/receive name (infinite loop)",
                        x->a_symto->s_name);
            else pd_list(x->a_expanded_to->s_thing, &s_list, argc, argv);
        }
    }
}

static void gatom_float(t_gatom *x, t_float f)
{
    t_atom at;
    SETFLOAT(&at, f);
    gatom_set(x, 0, 1, &at);
    gatom_bang(x);
}

static void gatom_clipfloat(t_gatom *x, t_atom *ap, t_float f)
{
    if (x->a_draglo != 0 || x->a_draghi != 0)
    {
        if (f < x->a_draglo)
            f = x->a_draglo;
        if (f > x->a_draghi)
            f = x->a_draghi;
    }
    ap->a_w.w_float = f;
    gatom_senditup(x);
    gatom_bang(x);
}

static void gatom_symbol(t_gatom *x, t_symbol *s)
{
    t_atom at;
    SETSYMBOL(&at, s);
    gatom_set(x, 0, 1, &at);
    gatom_bang(x);
}

    /* We need a list method because, since there's both an "inlet" and a
    "nofirstin" flag, the standard list behavior gets confused. */
static void gatom_list(t_gatom *x, t_symbol *s, int argc, t_atom *argv)
{
    /* empty lists are like bang and output value for float and symbol, but clears list */
    if (argc || x->a_flavor == A_LIST)
        gatom_set(x, s, argc, argv);
    gatom_bang(x);
}

static void gatom_reborder(t_gatom *x)
{
    t_rtext *y = glist_findrtext(x->a_glist, &x->a_text);
    text_drawborder(&x->a_text, x->a_glist, rtext_gettag(y),
        rtext_width(y), rtext_height(y), 0);
}

void gatom_undarken(t_text *x)
{
    if (x->te_type == T_ATOM)
    {
        ((t_gatom *)x)->a_doubleclicked =
            ((t_gatom *)x)->a_grabbed = 0;
        gatom_reborder((t_gatom *)x);
    }
    else bug("gatom_undarken");
}

void gatom_key(void *z, t_symbol *keysym, t_floatarg f)
{
    t_gatom *x = (t_gatom *)z;
    int c = f, bufsize, i;
    char *buf;
    t_atom *ap = gatom_getatom(x);

    t_rtext *t = glist_findrtext(x->a_glist, &x->a_text);
    if (c == 0 && !x->a_doubleclicked)
    {
        /* we're being notified that no more keys will come for this grab */
        if (t == x->a_glist->gl_editor->e_textedfor)
            rtext_activate(t, 0);
        x->a_grabbed = 0;
        gatom_reborder(x);
        gatom_redraw(&x->a_text.te_g, x->a_glist);
    }
    else if (c == '\n')
    {
        x->a_doubleclicked = 0;
        if (t == x->a_glist->gl_editor->e_textedfor)
        {
            rtext_gettext(t, &buf, &bufsize);
            rtext_key(t, 0, gensym("End"));
            for (i = 0; i < 3; i++)
                if (buf[bufsize-i-1] != '.')
                    break;
            while (i--)
                rtext_key(t, '\b', &s_);
            rtext_gettext(t, &buf, &bufsize);
            if (x->a_flavor == A_FLOAT)
                ap->a_w.w_float = atof(buf);
            else if (x->a_flavor == A_SYMBOL)
                ap->a_w.w_symbol = gensym(buf);
            else
                text_setto(&x->a_text, x->a_glist, buf, bufsize);
            rtext_activate(t, 0);
        }
        gatom_bang(x);
        gatom_senditup(x);
    }
    else
    {
        if (t != x->a_glist->gl_editor->e_textedfor)
        {
            rtext_activate(t, 1);
            rtext_key(t, '.', &s_);
            rtext_key(t, '.', &s_);
            rtext_key(t, '.', &s_);
            rtext_key(t, 0, gensym("Home"));
        }
        if (x->a_flavor == A_SYMBOL || x->a_flavor == A_LIST)
            rtext_key(t, c, keysym);  /* insert the character */
        else if (x->a_flavor == A_FLOAT && ((c >= '0' && c <= '9') || c == '.' ||
            c == '-' || c == '+' || c == 'e' || c == 'E' || c == '\b'))
                rtext_key(t, c, keysym);  /* insert the accepted characters */
    }
}

static void gatom_motion(void *z, t_floatarg dx, t_floatarg dy,
    t_floatarg up)
{
    t_gatom *x = (t_gatom *)z;
    if (up != 0)
    {
        t_rtext *t = glist_findrtext(x->a_glist, &x->a_text);
        rtext_retext(t);
        if (x->a_doubleclicked)    /* double click - activate text on release */
            rtext_activate(t, 1);
    }
    else
    {
        t_atom *ap;
        x->a_doubleclicked = 0;
        if (x->a_dragindex <0)
            return;
        if (dy == 0 || x->a_dragindex < 0 ||
            x->a_dragindex >= binbuf_getnatom(x->a_text.te_binbuf)
            || binbuf_getvec(x->a_text.te_binbuf)[x->a_dragindex].a_type != A_FLOAT)
                return;
        ap = &binbuf_getvec(x->a_text.te_binbuf)[x->a_dragindex];
        if (x->a_shift)
        {
            double nval = ap->a_w.w_float - 0.01 * dy;
            double trunc = 0.01 * (floor(100. * nval + 0.5));
            if (trunc < nval + 0.0001 && trunc > nval - 0.0001)
                nval = trunc;
            gatom_clipfloat(x, ap, nval);
        }
        else
        {
            double nval = ap->a_w.w_float - dy;
            double trunc = 0.01 * (floor(100. * nval + 0.5));
            if (trunc < nval + 0.0001 && trunc > nval - 0.0001)
                nval = trunc;
            trunc = floor(nval + 0.5);
            if (trunc < nval + 0.001 && trunc > nval - 0.001)
                nval = trunc;
            gatom_clipfloat(x, ap, nval);
        }
    }
}

int rtext_findatomfor(t_rtext *x, int xpos, int ypos);

    /* this is called when gatom is clicked on with patch in run mode. */
static int gatom_doclick(t_gobj *z, t_glist *gl, int xpos, int ypos,
    int shift, int alt, int dbl, int doit)
{
    t_gatom *x = (t_gatom *)z;
    t_atom *ap = gatom_getatom(x);
    t_rtext *t;

    if (!doit)
        return (1);
    t = glist_findrtext(x->a_glist, &x->a_text);
    if (t == x->a_glist->gl_editor->e_textedfor)
    {
        rtext_mouse(t, xpos, ypos, (dbl ? RTEXT_DBL : RTEXT_DOWN));
        x->a_glist->gl_editor->e_onmotion = MA_DRAGTEXT;
        x->a_glist->gl_editor->e_xwas = xpos;
        x->a_glist->gl_editor->e_ywas = ypos;
        return (1);
    }
    if (x->a_flavor == A_FLOAT)
    {
        if (x->a_text.te_width == 1)
            gatom_float(x, (ap->a_w.w_float == 0));
        else
        {
            if (alt)
            {
                if (ap->a_w.w_float != 0)
                {
                    x->a_toggle = ap->a_w.w_float;
                    gatom_float(x, 0);
                }
                else gatom_float(x, x->a_toggle);
            }
            else
            {
                x->a_dragindex = 0;
                x->a_shift = shift;
            }
        }
    }
    else if (x->a_flavor == A_LIST)
    {
        int x1, y1, x2, y2, indx, argc = binbuf_getnatom(x->a_text.te_binbuf);
        t_atom *argv = binbuf_getvec(x->a_text.te_binbuf);
        gobj_getrect(z, gl, &x1, &y1, &x2, &y2);
        indx = rtext_findatomfor(t, xpos - x1, ypos - y1);
        if (indx >= 0 && indx < argc && argv[indx].a_type == A_FLOAT)
        {
            x->a_dragindex = indx;
            x->a_shift = shift;
        }
        else x->a_dragindex = -1;
    }
    x->a_grabbed = 1;
    x->a_doubleclicked = dbl;
    gatom_reborder(x);
    glist_grab(x->a_glist, &x->a_text.te_g, gatom_motion, gatom_key,
        xpos, ypos);
    return (1);
}

    /* probably never used but included in case needed for compatibility */
static void gatom_click(t_gatom *x, t_floatarg xpos, t_floatarg ypos,
    t_floatarg shift, t_floatarg ctrl, t_floatarg alt)
{
    pd_error(x, "gatom_click is obsolete and may be deleted in future");
    gatom_doclick(&x->a_text.te_g, x->a_glist, xpos, ypos, shift, ctrl, 0, 1);
}

    /* message back from dialog window */
static void gatom_param(t_gatom *x, t_symbol *sel, int argc, t_atom *argv)
{
    t_float width = atom_getfloatarg(0, argc, argv);
    t_float draglo = atom_getfloatarg(1, argc, argv);
    t_float draghi = atom_getfloatarg(2, argc, argv);
    t_symbol *label = gatom_unescapit(atom_getsymbolarg(3, argc, argv));
    t_float wherelabel = atom_getfloatarg(4, argc, argv);
    t_symbol *symfrom = gatom_unescapit(atom_getsymbolarg(5, argc, argv));
    t_symbol *symto = gatom_unescapit(atom_getsymbolarg(6, argc, argv));
    int newfont = atom_getfloatarg(7, argc, argv);
    t_atom undo[8];
    int is_visible = glist_isvisible(x->a_glist);
    int should_visible = gobj_shouldvis((t_gobj*)x, x->a_glist);

    SETFLOAT (undo+0, x->a_text.te_width);
    SETFLOAT (undo+1, x->a_draglo);
    SETFLOAT (undo+2, x->a_draghi);
    SETSYMBOL(undo+3, gatom_escapit(x->a_label));
    SETFLOAT (undo+4, x->a_wherelabel);
    SETSYMBOL(undo+5, gatom_escapit(x->a_symfrom));
    SETSYMBOL(undo+6, gatom_escapit(x->a_symto));
    SETFLOAT (undo+7, x->a_fontsize);
    pd_undo_set_objectstate(x->a_glist, (t_pd*)x, gensym("param"),
                            8, undo,
                            argc, argv);

    if(is_visible)
        gobj_vis(&x->a_text.te_g, x->a_glist, 0);
    if (!*symfrom->s_name && *x->a_symfrom->s_name)
        inlet_new(&x->a_text, &x->a_text.te_pd, 0, 0);
    else if (*symfrom->s_name && !*x->a_symfrom->s_name && x->a_text.te_inlet)
    {
        canvas_deletelinesforio(x->a_glist, &x->a_text,
            x->a_text.te_inlet, 0);
        inlet_free(x->a_text.te_inlet);
    }
    if (!*symto->s_name && *x->a_symto->s_name)
        outlet_new(&x->a_text, 0);
    else if (*symto->s_name && !*x->a_symto->s_name && x->a_text.te_outlet)
    {
        canvas_deletelinesforio(x->a_glist, &x->a_text,
            0, x->a_text.te_outlet);
        outlet_free(x->a_text.te_outlet);
    }
    if (draglo >= draghi)
        draglo = draghi = 0;
    x->a_draglo = draglo;
    x->a_draghi = draghi;
    if (width < 0)
        width = 4;
    else if (width > 1000)
        width = 1000;
    x->a_text.te_width = width;
    x->a_wherelabel = ((int)wherelabel & 3);
    x->a_label = label;
    x->a_fontsize = newfont;
    if (*x->a_symfrom->s_name)
        pd_unbind(&x->a_text.te_pd,
            canvas_realizedollar(x->a_glist, x->a_symfrom));
    x->a_symfrom = symfrom;
    if (*x->a_symfrom->s_name)
        pd_bind(&x->a_text.te_pd,
            canvas_realizedollar(x->a_glist, x->a_symfrom));
    x->a_symto = symto;
    x->a_expanded_to = canvas_realizedollar(x->a_glist, x->a_symto);

    if(is_visible && should_visible)
        gobj_vis(&x->a_text.te_g, x->a_glist, 1);
    canvas_dirty(x->a_glist, 1);
    if(is_visible)
        canvas_fixlinesfor(x->a_glist, (t_text*)x);
    /* glist_retext(x->a_glist, &x->a_text); */
}

static int gatom_fontsize(t_gatom *x)
{
    return (x->a_fontsize ? x->a_fontsize : glist_getfont(x->a_glist));
}

    /* ---------------- gatom-specific widget functions --------------- */
static void gatom_getwherelabel(t_gatom *x, t_glist *glist, int *xp, int *yp)
{
    int x1, y1, x2, y2;
    int zoom = glist_getzoom(glist), fontsize = gatom_fontsize(x);
    text_getrect(&x->a_text.te_g, glist, &x1, &y1, &x2, &y2);
    if (x->a_wherelabel == ATOM_LABELLEFT)
    {
        *xp = x1 - 3 * zoom - (
            (int)strlen(canvas_realizedollar(x->a_glist, x->a_label)->s_name) *
                sys_zoomfontwidth(fontsize, zoom, 0));
        *yp = y1 + 2 * zoom;
    }
    else if (x->a_wherelabel == ATOM_LABELRIGHT)
    {
        *xp = x2 + 2 * zoom;
        *yp = y1 + 2 * zoom;
    }
    else if (x->a_wherelabel == ATOM_LABELUP)
    {
        *xp = x1 - 1 * zoom;
        *yp = y1 - 1 * zoom - sys_zoomfontheight(fontsize, zoom, 0);
    }
    else
    {
        *xp = x1 - 1 * zoom;
        *yp = y2 + 3 * zoom;
    }
}

static void gatom_displace(t_gobj *z, t_glist *glist,
    int dx, int dy)
{
    t_gatom *x = (t_gatom*)z;
    text_displace(z, glist, dx, dy);
    if (glist_isvisible(glist))
    {
        char buf[MAXPDSTRING];
        sprintf(buf, "%lx.l", x);
        pdgui_vmess(0, "crs ii",
            glist_getcanvas(glist),
            "move",
            buf,
            dx * glist->gl_zoom, dy * glist->gl_zoom);
    }
}

static void gatom_vis(t_gobj *z, t_glist *glist, int vis)
{
    t_gatom *x = (t_gatom*)z;
    text_vis(z, glist, vis);
    if (*x->a_label->s_name)
    {
        char buf[MAXPDSTRING];
        sprintf(buf, "%lx.l", x);
        if (vis)
        {
            int x1, y1;
            char *tags[] = {
                buf,
                "label",
                "text"
            };
            gatom_getwherelabel(x, glist, &x1, &y1);
            pdgui_vmess("pdtk_text_new", "cS ff s ir",
                glist_getcanvas(glist),
                3, tags,
                (double)x1, (double)y1,
                canvas_realizedollar(x->a_glist, x->a_label)->s_name,
                gatom_fontsize(x) * glist_getzoom(glist), "black");
        }
        else
            pdgui_vmess(0, "crs", glist_getcanvas(glist), "delete", buf);
    }
}

void canvas_atom(t_glist *gl, t_atomtype type,
    t_symbol *s, int argc, t_atom *argv)
{
    t_gatom *x = (t_gatom *)pd_new(gatom_class);
    x->a_text.te_width = 0;                        /* don't know it yet. */
    x->a_text.te_type = T_ATOM;
    x->a_text.te_binbuf = binbuf_new();
    x->a_glist = gl;
    x->a_flavor = type;
    x->a_toggle = 1;
    x->a_draglo = 0;
    x->a_draghi = 0;
    x->a_wherelabel = 0;
    x->a_label = &s_;
    x->a_symfrom = &s_;
    x->a_symto = x->a_expanded_to = &s_;
    x->a_grabbed = 0;
    x->a_revertbuf = 0;
    x->a_fontsize = 0;
    (void)gatom_getatom(x);  /* this forces initialization of binbuf */
    if (argc > 1)
        /* create from file. x, y, width, low-range, high-range, flags,
            label, receive-name, send-name, fontsize */
    {
        x->a_text.te_xpix = atom_getfloatarg(0, argc, argv);
        x->a_text.te_ypix = atom_getfloatarg(1, argc, argv);
        x->a_text.te_width = atom_getfloatarg(2, argc, argv);
            /* sanity check because some very old patches have trash in this
            field... remove this in 2003 or so: */
        if (x->a_text.te_width < 0 || x->a_text.te_width > 500)
            x->a_text.te_width = 4;
        x->a_draglo = atom_getfloatarg(3, argc, argv);
        x->a_draghi = atom_getfloatarg(4, argc, argv);
        x->a_wherelabel = (((int)atom_getfloatarg(5, argc, argv)) & 3);
        x->a_label = gatom_unescapit(atom_getsymbolarg(6, argc, argv));
        x->a_symfrom = gatom_unescapit(atom_getsymbolarg(7, argc, argv));
        if (*x->a_symfrom->s_name)
            pd_bind(&x->a_text.te_pd,
                canvas_realizedollar(x->a_glist, x->a_symfrom));

        x->a_symto = gatom_unescapit(atom_getsymbolarg(8, argc, argv));
        x->a_expanded_to = canvas_realizedollar(x->a_glist, x->a_symto);
        if (x->a_symto == &s_)
            outlet_new(&x->a_text,
                x->a_flavor == A_FLOAT ? &s_float: &s_symbol);
        if (x->a_symfrom == &s_)
            inlet_new(&x->a_text, &x->a_text.te_pd, 0, 0);
        x->a_fontsize = atom_getfloatarg(9, argc, argv);
        glist_add(gl, &x->a_text.te_g);
    }
    else    /* from menu - use default settings */
    {
        int connectme, xpix, ypix, indx, nobj;
        canvas_howputnew(gl, &connectme, &xpix, &ypix, &indx, &nobj);
        outlet_new(&x->a_text,
            x->a_flavor == A_FLOAT ? &s_float: &s_symbol);
        inlet_new(&x->a_text, &x->a_text.te_pd, 0, 0);
        pd_vmess(&gl->gl_pd, gensym("editmode"), "i", 1);
        x->a_text.te_xpix = xpix;
        x->a_text.te_ypix = ypix;
        x->a_text.te_width = (x->a_flavor == A_FLOAT ? 5 :
            (x->a_flavor == A_SYMBOL ? 10 : 20));
        glist_add(gl, &x->a_text.te_g);
        glist_noselect(gl);
        glist_select(gl, &x->a_text.te_g);
        if (connectme)
            canvas_connect(gl, indx, 0, nobj, 0);
        else canvas_startmotion(glist_getcanvas(gl));
        canvas_undo_add(glist_getcanvas(gl), UNDO_CREATE, "create",
            (void *)canvas_undo_set_create(glist_getcanvas(gl)));
    }
}

void canvas_floatatom(t_glist *gl, t_symbol *s, int argc, t_atom *argv)
{
    canvas_atom(gl, A_FLOAT, s, argc, argv);
}

void canvas_symbolatom(t_glist *gl, t_symbol *s, int argc, t_atom *argv)
{
    canvas_atom(gl, A_SYMBOL, s, argc, argv);
}

void canvas_listbox(t_glist *gl, t_symbol *s, int argc, t_atom *argv)
{
    canvas_atom(gl, A_LIST, s, argc, argv);
}

static void gatom_free(t_gatom *x)
{
    if (*x->a_symfrom->s_name)
        pd_unbind(&x->a_text.te_pd,
            canvas_realizedollar(x->a_glist, x->a_symfrom));
    pdgui_stub_deleteforkey(x);
    sys_unqueuegui(x);
}

static void gatom_properties(t_gobj *z, t_glist *owner)
{
    t_gatom *x = (t_gatom *)z;
    pdgui_stub_vnew(&x->a_text.te_pd, "pdtk_gatom_dialog", x,
        "i ff i sss i",
        x->a_text.te_width,
        x->a_draglo, x->a_draghi,
        x->a_wherelabel,
        gatom_escapit(x->a_label)->s_name,
        gatom_escapit(x->a_symfrom)->s_name,
        gatom_escapit(x->a_symto)->s_name,
        x->a_fontsize);
}


/* -------------------- widget behavior for text objects ------------ */

static void text_getrect(t_gobj *z, t_glist *glist,
    int *xp1, int *yp1, int *xp2, int *yp2)
{
    t_text *x = (t_text *)z;
    int width, height, iscomment = (x->te_type == T_TEXT);
    t_float x1, y1, x2, y2;

    if (glist->gl_editor && glist->gl_editor->e_rtext)
    {
        t_rtext *y = glist_findrtext(glist, x);
        width = rtext_width(y);
        height = rtext_height(y) - (iscomment << 1);
    }
        /* for number boxes, we know width and height a priori, and should
        report them here so that graphs can get swelled to fit. */

    else if (x->te_type == T_ATOM && x->te_width > 0)
    {
        width = (x->te_width > 0 ? x->te_width : 6) * glist_fontwidth(glist);
        height = glist_fontheight(glist);
        if (glist_getzoom(glist) > 1)
        {
            /* zoom margins */
            width += ATOM_RMARGIN * glist_getzoom(glist);
            height += ATOM_BMARGIN * glist_getzoom(glist);
        }
        else
        {
            width += ATOM_RMARGIN;
            height += ATOM_BMARGIN;
        }
    }
        /* if we're invisible we don't know our size so we just lie about
        it.  This is called on invisible boxes to establish order of inlets
        and possibly other reasons.
           To find out if the box is visible we can't just check the "vis"
        flag because we might be within the vis() routine and not have set
        that yet.  So we check directly whether the "rtext" list has been
        built.  LATER reconsider when "vis" flag should be on and off? */

    else width = height = 10;
    x1 = text_xpix(x, glist);
    y1 = text_ypix(x, glist);
    x2 = x1 + width;
    y2 = y1 + height;
    y1 += iscomment;
    *xp1 = x1;
    *yp1 = y1;
    *xp2 = x2;
    *yp2 = y2;
}

static void text_displace(t_gobj *z, t_glist *glist,
    int dx, int dy)
{
    t_text *x = (t_text *)z;
    x->te_xpix += dx;
    x->te_ypix += dy;
    if (glist_isvisible(glist))
    {
        t_rtext *y = glist_findrtext(glist, x);
        rtext_displace(y, glist->gl_zoom * dx, glist->gl_zoom * dy);
        text_drawborder(x, glist, rtext_gettag(y),
            rtext_width(y), rtext_height(y), 0);
        canvas_fixlinesfor(glist, x);
    }
}

static void text_select(t_gobj *z, t_glist *glist, int state)
{
    t_text *x = (t_text *)z;
    t_rtext *y = glist_findrtext(glist, x);
    rtext_select(y, state);
    if (glist_isvisible(glist) && gobj_shouldvis(&x->te_g, glist))
    {
        char buf[MAXPDSTRING];
        sprintf(buf, "%sR", rtext_gettag(y));
        pdgui_vmess(0, "crs rr",
            glist,
            "itemconfigure",
            buf,
            "-fill", (state? "blue" : "black"));
    }
}

static void text_activate(t_gobj *z, t_glist *glist, int state)
{
    t_text *x = (t_text *)z;
    t_rtext *y = glist_findrtext(glist, x);
    if (z->g_pd != gatom_class)
        rtext_activate(y, state);
}

static void text_delete(t_gobj *z, t_glist *glist)
{
    t_text *x = (t_text *)z;
        canvas_deletelinesfor(glist, x);
}

static void text_vis(t_gobj *z, t_glist *glist, int vis)
{
    t_text *x = (t_text *)z;
    if (vis)
    {
        if (gobj_shouldvis(&x->te_g, glist))
        {
            t_rtext *y = glist_findrtext(glist, x);
            text_drawborder(x, glist, rtext_gettag(y),
                rtext_width(y), rtext_height(y), 1);
            rtext_draw(y);
        }
    }
    else
    {
        t_rtext *y = glist_findrtext(glist, x);
        if (gobj_shouldvis(&x->te_g, glist))
        {
            text_eraseborder(x, glist, rtext_gettag(y));
            rtext_erase(y);
        }
    }
}

static int text_click(t_gobj *z, struct _glist *glist,
    int xpix, int ypix, int shift, int alt, int dbl, int doit)
{
    t_text *x = (t_text *)z;
    if (x->te_type == T_OBJECT)
    {
        t_symbol *clicksym = gensym("click");
        if (zgetfn(&x->te_pd, clicksym))
        {
            if (doit)
                pd_vmess(&x->te_pd, clicksym, "fffff",
                    (double)xpix, (double)ypix,
                        (double)shift, (double)0, (double)alt);
            return (1);
        }
        else return (0);
    }
    else if (x->te_type == T_MESSAGE)
    {
        if (doit)
            message_click((t_message *)x, (t_floatarg)xpix, (t_floatarg)ypix,
                (t_floatarg)shift, (t_floatarg)0, (t_floatarg)alt);
        return (1);
    }
    else return (0);
}

void canvas_statesavers_doit(t_glist *x, t_binbuf *b);
void text_save(t_gobj *z, t_binbuf *b)
{
    t_text *x = (t_text *)z;
    if (x->te_type == T_OBJECT)
    {
            /* if we have a "saveto" method, and if we don't happen to be
            a canvas that's an abstraction, the saveto method does the work */
        if (zgetfn(&x->te_pd, gensym("saveto")) &&
            !((pd_class(&x->te_pd) == canvas_class) &&
                (canvas_isabstraction((t_canvas *)x)
                    || canvas_istable((t_canvas *)x))))
        {
            mess1(&x->te_pd, gensym("saveto"), b);
            binbuf_addv(b, "ssii", gensym("#X"), gensym("restore"),
                (int)x->te_xpix, (int)x->te_ypix);
            binbuf_addbinbuf(b, x->te_binbuf);
            binbuf_addv(b, ";");
            if (x->te_width)
                binbuf_addv(b, "ssi;",
                    gensym("#X"), gensym("f"), (int)x->te_width);
        }
        else    /* otherwise just save the text */
        {
            binbuf_addv(b, "ssii", gensym("#X"), gensym("obj"),
                (int)x->te_xpix, (int)x->te_ypix);
            binbuf_addbinbuf(b, x->te_binbuf);
            if (x->te_width)
                binbuf_addv(b, ",si", gensym("f"), (int)x->te_width);
            binbuf_addv(b, ";");
        }
            /* if an abstraction, give it a chance to save state */
        if (pd_class(&x->te_pd) == canvas_class &&
            canvas_isabstraction((t_canvas *)x))
                canvas_statesavers_doit((t_glist *)x, b);
    }
    else if (x->te_type == T_MESSAGE)
    {
        binbuf_addv(b, "ssii", gensym("#X"), gensym("msg"),
            (int)x->te_xpix, (int)x->te_ypix);
        binbuf_addbinbuf(b, x->te_binbuf);
        if (x->te_width)
            binbuf_addv(b, ",si", gensym("f"), (int)x->te_width);
        binbuf_addv(b, ";");
    }
    else if (x->te_type == T_ATOM)
    {
        t_atomtype t = ((t_gatom *)x)->a_flavor;
        t_symbol *sel = (t == A_SYMBOL ? gensym("symbolatom") :
            (t == A_FLOAT ? gensym("floatatom") : gensym("listbox")));
        t_symbol *label = gatom_escapit(((t_gatom *)x)->a_label);
        t_symbol *symfrom = gatom_escapit(((t_gatom *)x)->a_symfrom);
        t_symbol *symto = gatom_escapit(((t_gatom *)x)->a_symto);
        binbuf_addv(b, "ssiiifffsssf;", gensym("#X"), sel,
            (int)x->te_xpix, (int)x->te_ypix, (int)x->te_width,
            (double)((t_gatom *)x)->a_draglo,
            (double)((t_gatom *)x)->a_draghi,
            (double)((t_gatom *)x)->a_wherelabel,
            label, symfrom, symto, (double)((t_gatom *)x)->a_fontsize);
    }
    else
    {
        binbuf_addv(b, "ssii", gensym("#X"), gensym("text"),
            (int)x->te_xpix, (int)x->te_ypix);
        binbuf_addbinbuf(b, x->te_binbuf);
        if (x->te_width)
            binbuf_addv(b, ",si", gensym("f"), (int)x->te_width);
        binbuf_addv(b, ";");
    }
}

    /* this one is for everyone but "gatoms"; it's imposed in m_class.c */
const t_widgetbehavior text_widgetbehavior =
{
    text_getrect,
    text_displace,
    text_select,
    text_activate,
    text_delete,
    text_vis,
    text_click,
};

static const t_widgetbehavior gatom_widgetbehavior =
{
    text_getrect,
    gatom_displace,
    text_select,
    text_activate,
    text_delete,
    gatom_vis,
    gatom_doclick,
};

/* -------------------- the "text" class  ------------ */

    /* draw inlets and outlets for a text object or for a graph. */
void glist_drawiofor(t_glist *glist, t_object *ob, int firsttime,
    const char *tag, int x1, int y1, int x2, int y2)
{
    int n = obj_noutlets(ob), nplus = (n == 1 ? 1 : n-1), i;
    int width = x2 - x1;
    int iow = IOWIDTH * glist->gl_zoom;
    int ih = IHEIGHT * glist->gl_zoom, oh = OHEIGHT * glist->gl_zoom;
    char *tags[2];
    char tagbuf[128];

    /* draw over border, so assume border width = 1 pixel * glist->gl_zoom */
    for (i = 0; i < n; i++)
    {
        int onset = x1 + (width - iow) * i / nplus;
        sprintf(tagbuf, "%so%d", tag, i);
        tags[0] = tagbuf;
        tags[1] = "outlet";
        if (firsttime)
            pdgui_vmess(0, "crr iiii rS rr",
                glist_getcanvas(glist), "create", "rectangle",
                onset, y2 - oh + glist->gl_zoom, onset + iow, y2,
                "-tags", (int)(sizeof(tags)/sizeof(*tags)), tags,
                "-fill", "black");
        else
            pdgui_vmess(0, "crs iiii",
                glist_getcanvas(glist), "coords", tagbuf,
                onset, y2 - oh + glist->gl_zoom, onset + iow, y2);
    }
    n = obj_ninlets(ob);
    nplus = (n == 1 ? 1 : n-1);
    for (i = 0; i < n; i++)
    {
        int onset = x1 + (width - iow) * i / nplus;
        sprintf(tagbuf, "%si%d", tag, i);
        tags[0] = tagbuf;
        tags[1] = "inlet";
        if (firsttime)
            pdgui_vmess(0, "crr iiii rS rr",
                glist_getcanvas(glist),
                "create", "rectangle",
                onset, y1, onset + iow, y1 + ih - glist->gl_zoom,
                "-tags", (int)(sizeof(tags)/sizeof(*tags)), tags,
                "-fill", "black");
        else
            pdgui_vmess(0, "crs iiii",
                glist_getcanvas(glist), "coords", tagbuf,
                onset, y1, onset + iow, y1 + ih - glist->gl_zoom);
    }
}

void text_drawborder(t_text *x, t_glist *glist,
    const char *tag, int width2, int height2, int firsttime)
{
    t_object *ob;
    int x1, y1, x2, y2, width, height, corner;
    char tagR[128];
    sprintf(tagR, "%sR", tag);
    text_getrect(&x->te_g, glist, &x1, &y1, &x2, &y2);
    width = x2 - x1;
    height = y2 - y1;
    if (x->te_type == T_OBJECT)
    {
        char *pattern = ((pd_class(&x->te_pd) == text_class) ? "-" : "\"\"");
        char *tags[] = {tagR, "obj"};
        if (firsttime)
            pdgui_vmess(0, "crr iiiiiiiiii rr ri rr rS",
                glist_getcanvas(glist), "create", "line",
                x1, y1,  x2, y1,  x2, y2,  x1, y2,  x1, y1,
                "-dash", pattern,
                "-width", glist->gl_zoom,
                "-capstyle", "projecting",
                "-tags", 2, tags);
        else
        {
            pdgui_vmess(0, "crs iiiiiiiiii",
                glist_getcanvas(glist), "coords", tagR,
                x1, y1,  x2, y1,  x2, y2,  x1, y2,  x1, y1);
            pdgui_vmess(0, "crs rr",
                glist_getcanvas(glist), "itemconfigure", tagR,
                "-dash", pattern);
        }
    }
    else if (x->te_type == T_MESSAGE)
    {
        char *tags[] = {tagR, "msg"};
        corner = ((y2-y1)/4);
        if (corner > 10*glist->gl_zoom)
            corner = 10*glist->gl_zoom; /* looks bad if too big */
        if (firsttime)
            pdgui_vmess(0, "crr iiiiiiiiiiiiii ri rr rS",
                glist_getcanvas(glist), "create", "line",
                x1, y1,  x2+corner, y1,  x2, y1+corner,  x2, y2-corner,  x2+corner, y2,  x1, y2,  x1, y1,
                "-width", glist->gl_zoom,
                "-capstyle", "projecting",
                "-tags", 2, tags);
        else
            pdgui_vmess(0, "crs iiiiiiiiiiiiii",
                glist_getcanvas(glist), "coords", tagR,
                x1, y1,  x2+corner, y1,  x2, y1+corner,  x2, y2-corner,  x2+corner, y2,  x1, y2,  x1, y1);
    }
    else if (x->te_type == T_ATOM && (((t_gatom *)x)->a_flavor == A_FLOAT ||
           ((t_gatom *)x)->a_flavor == A_SYMBOL))
    {
            /* number or symbol */
        int grabbed = glist->gl_zoom * ((t_gatom *)x)->a_grabbed;
        int x1p = x1 + grabbed, y1p = y1 + grabbed;
        char *tags[] = {tagR, "atom"};
        corner = ((y2-y1)/4);
        if (firsttime)
            pdgui_vmess(0, "crr iiiiiiiiiiii ri rr rS",
                glist_getcanvas(glist), "create", "line",
                x1p, y1p,  x2-corner, y1p,  x2, y1p+corner, x2, y2,  x1p, y2,  x1p, y1p,
                "-width", glist->gl_zoom+grabbed,
                "-capstyle", "projecting",
                "-tags", 2, tags);
        else
        {
            pdgui_vmess(0, "crs iiiiiiiiiiii",
                glist_getcanvas(glist), "coords", tagR,
                x1p, y1p,  x2-corner, y1p,  x2, y1p+corner,  x2, y2,  x1p, y2,  x1p, y1p);
            pdgui_vmess(0, "crs ri",
                glist_getcanvas(glist), "itemconfigure", tagR,
                "-width", glist->gl_zoom+grabbed);
        }
    }
    else if (x->te_type == T_ATOM ) /* list (ATOM but not float or symbol) */
    {
        int grabbed = glist->gl_zoom * ((t_gatom *)x)->a_grabbed;
        int x1p = x1 + grabbed, y1p = y1 + grabbed;
        char *tags[] = {tagR, "atom"};
        corner = ((y2-y1)/4);
        if (firsttime)
            pdgui_vmess(0, "crr iiiiiiiiiiiiii ri rr rS",
                glist_getcanvas(glist),
                "create", "line",
                x1p, y1p,  x2-corner, y1p,  x2, y1p+corner,  x2, y2-corner,  x2-corner, y2,  x1p, y2,  x1p, y1p,
                "-width", glist->gl_zoom+grabbed,
                "-capstyle", "projecting",
                "-tags", 2, tags);
        else
        {
            pdgui_vmess(0, "crs iiiiiiiiiiiiii",
                glist_getcanvas(glist), "coords", tagR,
                x1p,y1p, x2-corner,y1p, x2,y1p+corner, x2,y2-corner, x2-corner,y2, x1p,y2, x1p,y1p);
            pdgui_vmess(0, "crs ri",
                glist_getcanvas(glist), "itemconfigure", tagR,
                "-width", glist->gl_zoom+grabbed);
        }
    }
        /* for comments, just draw a bar on RHS if unlocked; when a visible
        canvas is unlocked we have to call this anew on all comments, and when
        locked we erase them all via the annoying "commentbar" tag. */
    else if (x->te_type == T_TEXT && glist->gl_edit)
    {
        char *tags[] = {tagR, "commentbar"};
        if (firsttime)
            pdgui_vmess(0, "crr iiii rS",
                glist_getcanvas(glist), "create", "line",
                x2, y1,  x2, y2,
                "-tags", 2, tags);
        else
            pdgui_vmess(0, "crs iiii",
                glist_getcanvas(glist), "coords", tagR,
                x2, y1,  x2, y2);
    }
        /* draw inlets/outlets */

    if ((ob = pd_checkobject(&x->te_pd)))
        glist_drawiofor(glist, ob, firsttime, tag, x1, y1, x2, y2);
    if (firsttime) /* raise cords over everything else */
        pdgui_vmess(0, "crr", glist_getcanvas(glist), "raise", "cord");
}

void glist_eraseiofor(t_glist *glist, t_object *ob, const char *tag)
{
    int i, n;
    n = obj_noutlets(ob);
    char tagbuf[MAXPDSTRING];
    for (i = 0; i < n; i++)
    {
        sprintf(tagbuf, "%so%d", tag, i);
        pdgui_vmess(0, "crs",
            glist_getcanvas(glist), "delete", tagbuf);
    }
    n = obj_ninlets(ob);
    for (i = 0; i < n; i++)
    {
        sprintf(tagbuf, "%si%d", tag, i);
        pdgui_vmess(0, "crs",
            glist_getcanvas(glist), "delete", tagbuf);
    }
}

void text_eraseborder(t_text *x, t_glist *glist, const char *tag)
{
    char tagbuf[MAXPDSTRING];
    if (x->te_type == T_TEXT && !glist->gl_edit) return;
    sprintf(tagbuf, "%sR", tag);
    pdgui_vmess(0, "crs",
        glist_getcanvas(glist), "delete", tagbuf);
    glist_eraseiofor(glist, x, tag);
}

    /* change text; if T_OBJECT, remake it.  */
void text_setto(t_text *x, t_glist *glist, const char *buf, int bufsize)
{
    int pos = glist_getindex(glist_getcanvas(glist), &x->te_g);
    if (x->te_type == T_OBJECT)
    {
        t_binbuf *b = binbuf_new();
        int natom1, natom2, widthwas = x->te_width;
        t_atom *vec1, *vec2;
        binbuf_text(b, buf, bufsize);
        natom1 = binbuf_getnatom(x->te_binbuf);
        vec1 = binbuf_getvec(x->te_binbuf);
        natom2 = binbuf_getnatom(b);
        vec2 = binbuf_getvec(b);
            /* special case: if  pd args change just pass the message on. */
        if (natom1 >= 1 && natom2 >= 1 && vec1[0].a_type == A_SYMBOL
            && !strcmp(vec1[0].a_w.w_symbol->s_name, "pd") &&
             vec2[0].a_type == A_SYMBOL
            && !strcmp(vec2[0].a_w.w_symbol->s_name, "pd"))
        {
            canvas_undo_add(glist_getcanvas(glist), UNDO_RECREATE, "recreate",
                (void *)canvas_undo_set_recreate(glist_getcanvas(glist),
                &x->te_g, pos));

            typedmess(&x->te_pd, gensym("rename"), natom2-1, vec2+1);
            binbuf_free(x->te_binbuf);
            x->te_binbuf = b;
        }
        else  /* normally, just destroy the old one and make a new one. */
        {
            int xwas = x->te_xpix, ywas = x->te_ypix;
            canvas_undo_add(glist_getcanvas(glist), UNDO_RECREATE, "recreate",
                (void *)canvas_undo_set_recreate(glist_getcanvas(glist),
                &x->te_g, pos));
            glist_delete(glist, &x->te_g);
            canvas_objtext(glist, xwas, ywas, widthwas, 0, b);
            canvas_restoreconnections(glist_getcanvas(glist));
                /* if it's an abstraction loadbang it here */
            if (pd_this->pd_newest)
            {
                if (pd_class(pd_this->pd_newest) == canvas_class)
                    canvas_loadbang((t_canvas *)pd_this->pd_newest);
                else if (zgetfn(pd_this->pd_newest, gensym("loadbang")))
                    vmess(pd_this->pd_newest, gensym("loadbang"), "f", LB_LOAD);
            }
        }
            /* if we made a new "pd" or changed a window name,
                update window list */
        if (natom2 >= 1  && vec2[0].a_type == A_SYMBOL
            && !strcmp(vec2[0].a_w.w_symbol->s_name, "pd"))
                canvas_updatewindowlist();
    }
    else
    {
        canvas_undo_add(glist_getcanvas(glist), UNDO_RECREATE, "recreate",
           (void *)canvas_undo_set_recreate(glist_getcanvas(glist),
            &x->te_g, pos));
        binbuf_text(x->te_binbuf, buf, bufsize);

    }
}

    /* this gets called when a message gets sent to an object whose creation
    failed, presumably because of loading a patch with a missing extern or
    abstraction */
static void text_anything(t_text *x, t_symbol *s, int argc, t_atom *argv)
{
}

void text_getfont(t_text *x, t_glist *thisglist,
    int *fwidthp, int *fheightp, int *guifsize)
{
    int font, zoom;
    t_glist *gl;
    if (pd_class(&x->te_pd) == canvas_class &&
        ((t_glist *)(x))->gl_isgraph &&
        ((t_glist *)(x))->gl_goprect)
            gl = (t_glist *)(x);
    else gl = thisglist;
    font =  glist_getfont(gl);
    zoom = glist_getzoom(gl);
        /* override if atom box has its own specified font size */
    if (x->te_type == T_ATOM && ((t_gatom *)x)->a_fontsize > 0)
        font = ((t_gatom *)x)->a_fontsize;
    *fwidthp = sys_zoomfontwidth(font, zoom, 0);
    *fheightp = sys_zoomfontheight(font, zoom, 0);
    *guifsize = sys_hostfontsize(font, zoom);
}


/*
        *fontwidthp =  glist_fontwidth((t_glist *)(x->x_text));
        fontheightp =  glist_fontheight((t_glist *)(x->x_text));
  *guifontsizep = sys_hostfontsize(font, glist_getzoom(x->x_glist));
*/

void g_text_setup(void)
{
    text_class = class_new(gensym("text"), 0, 0, sizeof(t_text),
        CLASS_NOINLET | CLASS_PATCHABLE, 0);
    class_addanything(text_class, text_anything);

    message_class = class_new(gensym("message"), 0, (t_method)message_free,
        sizeof(t_message), CLASS_PATCHABLE, 0);
    class_addbang(message_class, message_bang);
    class_addfloat(message_class, message_float);
    class_addsymbol(message_class, message_symbol);
    class_addlist(message_class, message_list);
    class_addanything(message_class, message_list);

    class_addmethod(message_class, (t_method)message_click, gensym("click"),
        A_FLOAT, A_FLOAT, A_FLOAT, A_FLOAT, A_FLOAT, 0);
    class_addmethod(message_class, (t_method)message_set, gensym("set"),
        A_GIMME, 0);
    class_addmethod(message_class, (t_method)message_add, gensym("add"),
        A_GIMME, 0);
    class_addmethod(message_class, (t_method)message_add2, gensym("add2"),
        A_GIMME, 0);
    class_addmethod(message_class, (t_method)message_addcomma,
        gensym("addcomma"), 0);
    class_addmethod(message_class, (t_method)message_addsemi,
        gensym("addsemi"), 0);
    class_addmethod(message_class, (t_method)message_adddollar,
        gensym("adddollar"), A_FLOAT, 0);
    class_addmethod(message_class, (t_method)message_adddollsym,
        gensym("adddollsym"), A_SYMBOL, 0);

    messresponder_class = class_new(gensym("messresponder"), 0, 0,
        sizeof(t_text), CLASS_PD, 0);
    class_addbang(messresponder_class, messresponder_bang);
    class_addfloat(messresponder_class, (t_method) messresponder_float);
    class_addsymbol(messresponder_class, messresponder_symbol);
    class_addlist(messresponder_class, messresponder_list);
    class_addanything(messresponder_class, messresponder_anything);

    gatom_class = class_new(gensym("gatom"), 0, (t_method)gatom_free,
        sizeof(t_gatom), CLASS_NOINLET | CLASS_PATCHABLE, 0);
    class_addbang(gatom_class, gatom_bang);
    class_addfloat(gatom_class, gatom_float);
    class_addsymbol(gatom_class, gatom_symbol);
    class_addlist(gatom_class, gatom_list);
    class_addmethod(gatom_class, (t_method)gatom_set, gensym("set"),
        A_GIMME, 0);
    class_addmethod(gatom_class, (t_method)gatom_click, gensym("click"),
        A_FLOAT, A_FLOAT, A_FLOAT, A_FLOAT, A_FLOAT, 0);
    class_addmethod(gatom_class, (t_method)gatom_param, gensym("param"),
        A_GIMME, 0);
    class_setwidget(gatom_class, &gatom_widgetbehavior);
    class_setpropertiesfn(gatom_class, gatom_properties);
    class_sethelpsymbol(gatom_class, gensym("gui-boxes"));
}
