g_editor.c 132 KB
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/* Copyright (c) 1997-2001 Miller Puckette and others.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution.  */

#include <stdlib.h>
#include <stdio.h>
#include "m_pd.h"
#include "m_imp.h"
#include "s_stuff.h"
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#include "g_magicglass.h"
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#include "g_canvas.h"
#include <string.h>

void glist_readfrombinbuf(t_glist *x, t_binbuf *b, char *filename,
    int selectem);

void open_via_helppath(const char *name, const char *dir);
char *class_gethelpdir(t_class *c);

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//static int toggle_moving = 0; //global variable

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/* ------------------ forward declarations --------------- */
static void canvas_doclear(t_canvas *x);
static void glist_setlastxy(t_glist *gl, int xval, int yval);
static void glist_donewloadbangs(t_glist *x);
static t_binbuf *canvas_docopy(t_canvas *x);
static void canvas_dopaste(t_canvas *x, t_binbuf *b);
static void canvas_paste(t_canvas *x);
static void canvas_clearline(t_canvas *x);
static t_binbuf *copy_binbuf;
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//static char *canvas_textcopybuf;
//static int canvas_textcopybufsize;
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static t_glist *glist_finddirty(t_glist *x);
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static void canvas_reselect(t_canvas *x);
static void canvas_cut(t_canvas *x);
static void canvas_undo(t_canvas *x);
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static int paste_xyoffset = 0; /* a counter of pastes to make x,y offsets */
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static void canvas_mouseup_gop(t_canvas *x, t_gobj *g);
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static void canvas_done_popup(t_canvas *x, t_float which, t_float xpos, t_float ypos);
static void canvas_doarrange(t_canvas *x, t_float which, t_gobj *oldy, t_gobj *oldy_prev, t_gobj *oldy_next);
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static void canvas_paste_xyoffset(t_canvas *x);
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void canvas_setgraph(t_glist *x, int flag, int nogoprect);
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// jsarlo
static char canvas_cnct_inlet_tag[4096];
static char canvas_cnct_outlet_tag[4096];
static int outlet_issignal = 0;
static int inlet_issignal = 0;
static int last_inlet_filter = 0;
static int last_outlet_filter = 0;
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static int copyfromexternalbuffer = 0;
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struct _outlet
{
    t_object *o_owner;
    struct _outlet *o_next;
    t_outconnect *o_connections;
    t_symbol *o_sym;
};
// end jsarlo

/* used for new duplicate behavior where we can "duplicate" into new window */
static t_canvas *c_selection;

/* iemgui uses black inlets and outlets while default objects use gray ones
   add here more as necessary */
int gobj_filter_highlight_behavior(t_rtext *y) {

	char *buf;
	char name[4];
	int bufsize, i;
	rtext_gettext(y, &buf, &bufsize);
	for (i = 0; i < 3; i++) {
		name[i] = buf[i];
	}
	name[3]='\0';
	//fprintf(stderr,"object name = >%s<\n", name);
	if (!strcmp(name, "bng") ||
		!strcmp(name, "nbx") ||
		!strcmp(name, "hdl") ||
		!strcmp(name, "hsl") ||
		!strcmp(name, "tgl") ||
		!strcmp(name, "vdl") ||
		!strcmp(name, "vsl") ||
		!strcmp(name, "vu ") ||
		/* alternative names for hradio and vradio when invoked from the menu */
		!strcmp(name, "hra") ||
		!strcmp(name, "vra")
		)
		return 1;

	return 0;
}
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/* ---------------- generic widget behavior ------------------------- */

void gobj_getrect(t_gobj *x, t_glist *glist, int *x1, int *y1,
    int *x2, int *y2)
{
    if (x->g_pd->c_wb && x->g_pd->c_wb->w_getrectfn)
        (*x->g_pd->c_wb->w_getrectfn)(x, glist, x1, y1, x2, y2);
}

void gobj_displace(t_gobj *x, t_glist *glist, int dx, int dy)
{
    if (x->g_pd->c_wb && x->g_pd->c_wb->w_displacefn)
        (*x->g_pd->c_wb->w_displacefn)(x, glist, dx, dy);
}

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void gobj_displace_withtag(t_gobj *x, t_glist *glist, int dx, int dy)
{
    if (x->g_pd->c_wb && x->g_pd->c_wb->w_displacefnwtag)
        (*x->g_pd->c_wb->w_displacefnwtag)(x, glist, dx, dy);
}

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void gobj_select(t_gobj *x, t_glist *glist, int state)
{
    if (x->g_pd->c_wb && x->g_pd->c_wb->w_selectfn)
        (*x->g_pd->c_wb->w_selectfn)(x, glist, state);
}

void gobj_activate(t_gobj *x, t_glist *glist, int state)
{
    if (x->g_pd->c_wb && x->g_pd->c_wb->w_activatefn)
        (*x->g_pd->c_wb->w_activatefn)(x, glist, state);
}

void gobj_delete(t_gobj *x, t_glist *glist)
{
    if (x->g_pd->c_wb && x->g_pd->c_wb->w_deletefn)
        (*x->g_pd->c_wb->w_deletefn)(x, glist);
}

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int gobj_shouldvis(t_gobj *x, struct _glist *glist)
{
    t_object *ob;
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	//fprintf(stderr,"shouldvis\n");
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    if (!glist->gl_havewindow && glist->gl_isgraph && glist->gl_goprect &&
        glist->gl_owner && (pd_class(&glist->gl_pd) != garray_class))
    {
        /* if we're graphing-on-parent and the object falls outside the
        graph rectangle, don't draw it. */
        int x1, y1, x2, y2, gx1, gy1, gx2, gy2, m;
        gobj_getrect(&glist->gl_gobj, glist->gl_owner, &x1, &y1, &x2, &y2);
        if (x1 > x2)
            m = x1, x1 = x2, x2 = m;
        if (y1 > y2)
            m = y1, y1 = y2, y2 = m;
        gobj_getrect(x, glist, &gx1, &gy1, &gx2, &gy2);
        if (gx1 < x1 || gx1 > x2 || gx2 < x1 || gx2 > x2 ||
            gy1 < y1 || gy1 > y2 || gy2 < y1 || gy2 > y2)
                return (0);
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		if (glist==glist_getcanvas(glist))
        	sys_vgui(".x%lx.c raise all_cords\n", glist_getcanvas(glist));
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    }
    if (ob = pd_checkobject(&x->g_pd))
    {
        /* return true if the text box should be drawn.  We don't show text
        boxes inside graphs---except comments, if we're doing the new
        (goprect) style. */
        return (glist->gl_havewindow ||
            (ob->te_pd != canvas_class &&
                ob->te_pd->c_wb != &text_widgetbehavior) ||
            (ob->te_pd == canvas_class && (((t_glist *)ob)->gl_isgraph)) ||
            (glist->gl_goprect && (ob->te_type == T_TEXT)));
    }
    else return (1);
}

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void gobj_vis(t_gobj *x, struct _glist *glist, int flag)
{
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    if (x->g_pd->c_wb && x->g_pd->c_wb->w_visfn && gobj_shouldvis(x, glist))
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        (*x->g_pd->c_wb->w_visfn)(x, glist, flag);
}

int gobj_click(t_gobj *x, struct _glist *glist,
    int xpix, int ypix, int shift, int alt, int dbl, int doit)
{
    if (x->g_pd->c_wb && x->g_pd->c_wb->w_clickfn)
        return ((*x->g_pd->c_wb->w_clickfn)(x,
            glist, xpix, ypix, shift, alt, dbl, doit));
    else return (0);
}

/* ------------------------ managing the selection ----------------- */

void glist_selectline(t_glist *x, t_outconnect *oc, int index1,
    int outno, int index2, int inno)
{
    if (x->gl_editor)
    {
        glist_noselect(x);
        x->gl_editor->e_selectedline = 1;
        x->gl_editor->e_selectline_index1 = index1;
        x->gl_editor->e_selectline_outno = outno;
        x->gl_editor->e_selectline_index2 = index2;
        x->gl_editor->e_selectline_inno = inno;
        x->gl_editor->e_selectline_tag = oc;
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        sys_vgui(".x%lx.c itemconfigure l%lx -fill $select_color\n",
            x, x->gl_editor->e_selectline_tag);
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        sys_vgui(".x%lx.c addtag selected withtag l%lx\n",
            glist_getcanvas(x), x->gl_editor->e_selectline_tag);
		c_selection = x;
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    }
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}

void glist_deselectline(t_glist *x)
{
    if (x->gl_editor)
    {
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        t_linetraverser t;
        t_outconnect *oc;
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        x->gl_editor->e_selectedline = 0;
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        linetraverser_start(&t, glist_getcanvas(x));
        do {
            oc = linetraverser_next(&t);
        } while (oc && oc != x->gl_editor->e_selectline_tag);
        int issignal;
        if(outlet_getsymbol(t.tr_outlet) == &s_signal)
            issignal = 1;
        else
            issignal = 0;
        sys_vgui(".x%lx.c itemconfigure l%lx -fill %s\n",
            x, x->gl_editor->e_selectline_tag,
            (issignal ? "$signal_cord" : "$msg_cord"));
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        sys_vgui(".x%lx.c dtag l%lx selected\n",
            glist_getcanvas(x), glist_getcanvas(x)->gl_editor->e_selectline_tag);
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    }    
}

int glist_isselected(t_glist *x, t_gobj *y)
{
    if (x->gl_editor)
    {
        t_selection *sel;
        for (sel = x->gl_editor->e_selection; sel; sel = sel->sel_next)
            if (sel->sel_what == y) return (1);
    }
    return (0);
}

    /* call this for unselected objects only */
void glist_select(t_glist *x, t_gobj *y)
{
    if (x->gl_editor)
    {
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		if (c_selection && c_selection != x)
			glist_noselect(c_selection);
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        t_selection *sel = (t_selection *)getbytes(sizeof(*sel));
        if (x->gl_editor->e_selectedline)
            glist_deselectline(x);
            /* LATER #ifdef out the following check */
        if (glist_isselected(x, y)) bug("glist_select");
        sel->sel_next = x->gl_editor->e_selection;
        sel->sel_what = y;
        x->gl_editor->e_selection = sel;
        gobj_select(y, x, 1);
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		c_selection = x;
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		sys_vgui("pdtk_canvas_update_edit_menu .x%lx 1\n", x);
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    }
}

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    /* recursively deselect everything in a gobj "g", if it happens to be
    a glist, in preparation for deselecting g itself in glist_dselect() */
static void glist_checkanddeselectall(t_glist *gl, t_gobj *g)
{
    t_glist *gl2;
    t_gobj *g2;
    if (pd_class(&g->g_pd) != canvas_class)
        return;
    gl2 = (t_glist *)g;
    for (g2 = gl2->gl_list; g2; g2 = g2->g_next)
        glist_checkanddeselectall(gl2, g2);
    glist_noselect(gl2);
}

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    /* call this for selected objects only */
void glist_deselect(t_glist *x, t_gobj *y)
{
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	//fprintf(stderr, "deselect\n");
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    int fixdsp = 0;
    static int reenter = 0;
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    /* if (reenter) return; */
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    reenter = 1;
    if (x->gl_editor)
    {
        t_selection *sel, *sel2;
        t_rtext *z = 0;
        if (!glist_isselected(x, y)) bug("glist_deselect");
        if (x->gl_editor->e_textedfor)
        {
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			//fprintf(stderr, "e_textedfor\n");
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            t_rtext *fuddy = glist_findrtext(x, (t_text *)y);
            if (x->gl_editor->e_textedfor == fuddy)
            {
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				//fprintf(stderr, "e_textedfor == fuddy\n");
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                if (x->gl_editor->e_textdirty)
                {
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					//fprintf(stderr, "textdirty yes\n");
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                    z = fuddy;
                    canvas_stowconnections(glist_getcanvas(x));
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                    glist_checkanddeselectall(x, y);
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                }
                gobj_activate(y, x, 0);
            }
            if (zgetfn(&y->g_pd, gensym("dsp")))
                fixdsp = canvas_suspend_dsp();
        }
        if ((sel = x->gl_editor->e_selection)->sel_what == y)
        {
            x->gl_editor->e_selection = x->gl_editor->e_selection->sel_next;
            gobj_select(sel->sel_what, x, 0);
            freebytes(sel, sizeof(*sel));
        }
        else
        {
            for (sel = x->gl_editor->e_selection; sel2 = sel->sel_next;
                sel = sel2)
            {
                if (sel2->sel_what == y)
                {
                    sel->sel_next = sel2->sel_next;
                    gobj_select(sel2->sel_what, x, 0);
                    freebytes(sel2, sizeof(*sel2));
                    break;
                }
            }
        }
        if (z)
        {
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			//fprintf(stderr, "setto\n");
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            char *buf;
            int bufsize;

            rtext_gettext(z, &buf, &bufsize);
            text_setto((t_text *)y, x, buf, bufsize);
            canvas_fixlinesfor(glist_getcanvas(x), (t_text *)y);
            x->gl_editor->e_textedfor = 0;
        }
        if (fixdsp)
            canvas_resume_dsp(1);
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		if (!x->gl_editor->e_selection)
			sys_vgui("pdtk_canvas_update_edit_menu .x%lx 0\n", x);
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    }
    reenter = 0;
}

void glist_noselect(t_glist *x)
{
    if (x->gl_editor)
    {
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		if (x->gl_editor->e_selection) {
		    while (x->gl_editor->e_selection)
		        glist_deselect(x, x->gl_editor->e_selection->sel_what);
		}
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        if (x->gl_editor->e_selectedline)
            glist_deselectline(x);
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		if (c_selection == x)
			c_selection = NULL;
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    }
}

void glist_selectall(t_glist *x)
{
    if (x->gl_editor)
    {
        glist_noselect(x);
        if (x->gl_list)
        {
            t_selection *sel = (t_selection *)getbytes(sizeof(*sel));
            t_gobj *y = x->gl_list;
            x->gl_editor->e_selection = sel;
            sel->sel_what = y;
            gobj_select(y, x, 1);
            while (y = y->g_next)
            {
                t_selection *sel2 = (t_selection *)getbytes(sizeof(*sel2));
                sel->sel_next = sel2;
                sel = sel2;
                sel->sel_what = y;
                gobj_select(y, x, 1);
            }
            sel->sel_next = 0;
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			c_selection = x;
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        }
    }
}

    /* get the index of a gobj in a glist.  If y is zero, return the
    total number of objects. */
int glist_getindex(t_glist *x, t_gobj *y)
{
    t_gobj *y2;
    int indx;

    for (y2 = x->gl_list, indx = 0; y2 && y2 != y; y2 = y2->g_next)
        indx++;
    return (indx);
}

    /* get the index of the object, among selected items, if "selected"
    is set; otherwise, among unselected ones.  If y is zero, just
    counts the selected or unselected objects. */
int glist_selectionindex(t_glist *x, t_gobj *y, int selected)
{
    t_gobj *y2;
    int indx;

    for (y2 = x->gl_list, indx = 0; y2 && y2 != y; y2 = y2->g_next)
        if (selected == glist_isselected(x, y2))
            indx++;
    return (indx);
}

static t_gobj *glist_nth(t_glist *x, int n)
{
    t_gobj *y;
    int indx;
    for (y = x->gl_list, indx = 0; y; y = y->g_next, indx++)
        if (indx == n)
            return (y);
    return (0);
}

/* ------------------- support for undo/redo  -------------------------- */

static t_undofn canvas_undo_fn;         /* current undo function if any */
static int canvas_undo_whatnext;        /* whether we can now UNDO or REDO */
static void *canvas_undo_buf;           /* data private to the undo function */
static t_canvas *canvas_undo_canvas;    /* which canvas we can undo on */
static const char *canvas_undo_name;

void canvas_setundo(t_canvas *x, t_undofn undofn, void *buf,
    const char *name)
{
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	//fprintf(stderr,"canvas_setundo %s\n", name);
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    int hadone = 0;
        /* blow away the old undo information.  In one special case the
        old undo info is re-used; if so we shouldn't free it here. */
    if (canvas_undo_fn && canvas_undo_buf && (buf != canvas_undo_buf))
    {
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		//fprintf(stderr,"hadone canvas_setundo\n");
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        (*canvas_undo_fn)(canvas_undo_canvas, canvas_undo_buf, UNDO_FREE);
        hadone = 1;
    }
    canvas_undo_canvas = x;
    canvas_undo_fn = undofn;
    canvas_undo_buf = buf;
    canvas_undo_whatnext = UNDO_UNDO;
    canvas_undo_name = name;
    if (x && glist_isvisible(x) && glist_istoplevel(x))
            /* enable undo in menu */
        sys_vgui("pdtk_undomenu .x%lx %s no\n", x, name);
    else if (hadone)
        sys_vgui("pdtk_undomenu nobody no no\n");
}

    /* clear undo if it happens to be for the canvas x.
     (but if x is 0, clear it regardless of who owns it.) */
void canvas_noundo(t_canvas *x)
{
    if (!x || (x == canvas_undo_canvas))
        canvas_setundo(0, 0, 0, "foo");
}

static void canvas_undo(t_canvas *x)
{
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	//fprintf(stderr,"canvas_undo\n");
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    if (x != canvas_undo_canvas)
        bug("canvas_undo 1");
    else if (canvas_undo_whatnext != UNDO_UNDO)
        bug("canvas_undo 2");
    else
    {
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        //fprintf(stderr,"undo\n");
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        (*canvas_undo_fn)(canvas_undo_canvas, canvas_undo_buf, UNDO_UNDO);
            /* enable redo in menu */
        if (glist_isvisible(x) && glist_istoplevel(x))
            sys_vgui("pdtk_undomenu .x%lx no %s\n", x, canvas_undo_name);
        canvas_undo_whatnext = UNDO_REDO;
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		sys_vgui("pdtk_canvas_getscroll .x%lx.c\n", x);
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    }
}

static void canvas_redo(t_canvas *x)
{
    if (x != canvas_undo_canvas)
        bug("canvas_undo 1");
    else if (canvas_undo_whatnext != UNDO_REDO)
        bug("canvas_undo 2");
    else
    {
        /* post("redo"); */
        (*canvas_undo_fn)(canvas_undo_canvas, canvas_undo_buf, UNDO_REDO);
            /* enable undo in menu */
        if (glist_isvisible(x) && glist_istoplevel(x))
            sys_vgui("pdtk_undomenu .x%lx %s no\n", x, canvas_undo_name);
        canvas_undo_whatnext = UNDO_UNDO;
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		sys_vgui("pdtk_canvas_getscroll .x%lx.c\n", x);
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    }
}

/* ------- specific undo methods: 1. connect and disconnect -------- */

typedef struct _undo_connect    
{
    int u_index1;
    int u_outletno;
    int u_index2;
    int u_inletno;
} t_undo_connect;

static void *canvas_undo_set_disconnect(t_canvas *x,
    int index1, int outno, int index2, int inno)
{
    t_undo_connect *buf = (t_undo_connect *)getbytes(sizeof(*buf));
    buf->u_index1 = index1;
    buf->u_outletno = outno;
    buf->u_index2 = index2;
    buf->u_inletno = inno;
    return (buf);
}

void canvas_disconnect(t_canvas *x,
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    t_float index1, t_float outno, t_float index2, t_float inno)
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{
    t_linetraverser t;
    t_outconnect *oc;
    linetraverser_start(&t, x);
    while (oc = linetraverser_next(&t))
    {
        int srcno = canvas_getindex(x, &t.tr_ob->ob_g);
        int sinkno = canvas_getindex(x, &t.tr_ob2->ob_g);
        if (srcno == index1 && t.tr_outno == outno &&
            sinkno == index2 && t.tr_inno == inno)
        {
            sys_vgui(".x%lx.c delete l%lx\n", x, oc);
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            // jsarlo
			if(x->gl_magic_glass) {
            	magicGlass_unbind(x->gl_magic_glass);
            	magicGlass_hide(x->gl_magic_glass);
			}
            // end jsarlo
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            obj_disconnect(t.tr_ob, t.tr_outno, t.tr_ob2, t.tr_inno);
            break;
        }
    }
}

static void canvas_undo_disconnect(t_canvas *x, void *z, int action)
{
    t_undo_connect *buf = z;
    if (action == UNDO_UNDO)
    {
        canvas_connect(x, buf->u_index1, buf->u_outletno,
            buf->u_index2, buf->u_inletno);
    }
    else if (action == UNDO_REDO)
    {
        canvas_disconnect(x, buf->u_index1, buf->u_outletno,
            buf->u_index2, buf->u_inletno);
    }
    else if (action == UNDO_FREE)
        t_freebytes(buf, sizeof(*buf));
}

    /* connect just calls disconnect actions backward... */
static void *canvas_undo_set_connect(t_canvas *x,
    int index1, int outno, int index2, int inno)
{
    return (canvas_undo_set_disconnect(x, index1, outno, index2, inno));
}

static void canvas_undo_connect(t_canvas *x, void *z, int action)
{
    int myaction;
    if (action == UNDO_UNDO)
        myaction = UNDO_REDO;
    else if (action == UNDO_REDO)
        myaction = UNDO_UNDO;
    else myaction = action;
    canvas_undo_disconnect(x, z, myaction);
}

/* ---------- ... 2. cut, clear, and typing into objects: -------- */

#define UCUT_CUT 1          /* operation was a cut */
#define UCUT_CLEAR 2        /* .. a clear */
#define UCUT_TEXT 3         /* text typed into a box */

typedef struct _undo_cut        
{
    t_binbuf *u_objectbuf;      /* the object cleared or typed into */
    t_binbuf *u_reconnectbuf;   /* connections into and out of object */
    t_binbuf *u_redotextbuf;    /* buffer to paste back for redo if TEXT */
    int u_mode;                 /* from flags above */
} t_undo_cut;

static void *canvas_undo_set_cut(t_canvas *x, int mode)
{
    t_undo_cut *buf;
    t_gobj *y;
    t_linetraverser t;
    t_outconnect *oc;
    int nnotsel= glist_selectionindex(x, 0, 0);
    buf = (t_undo_cut *)getbytes(sizeof(*buf));
    buf->u_mode = mode;
    buf->u_redotextbuf = 0;

        /* store connections into/out of the selection */
    buf->u_reconnectbuf = binbuf_new();
    linetraverser_start(&t, x);
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	if (linetraverser_next(&t)) {
		while (oc = linetraverser_next(&t))
		{
		    int issel1 = glist_isselected(x, &t.tr_ob->ob_g);
		    int issel2 = glist_isselected(x, &t.tr_ob2->ob_g);
		    if (issel1 != issel2)
		    {
		        binbuf_addv(buf->u_reconnectbuf, "ssiiii;",
		            gensym("#X"), gensym("connect"),
		            (issel1 ? nnotsel : 0)
		                + glist_selectionindex(x, &t.tr_ob->ob_g, issel1),
		            t.tr_outno,
		            (issel2 ? nnotsel : 0) +
		                glist_selectionindex(x, &t.tr_ob2->ob_g, issel2),
		            t.tr_inno);
		    }
		}
	}
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    if (mode == UCUT_TEXT)
    {
        buf->u_objectbuf = canvas_docopy(x);
    }
    else if (mode == UCUT_CUT)
    {
        buf->u_objectbuf = 0;
    }
    else if (mode == UCUT_CLEAR)
    {
        buf->u_objectbuf = canvas_docopy(x);
    }
    return (buf);
}

static void canvas_undo_cut(t_canvas *x, void *z, int action)
{
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	//fprintf(stderr, "canvas_undo_cut canvas=%d buf=%d action=%d\n", (int)x, (int)z, action);
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    t_undo_cut *buf = z;
    int mode = buf->u_mode;
    if (action == UNDO_UNDO)
    {
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		//fprintf(stderr,"UNDO_UNDO\n");
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        if (mode == UCUT_CUT) {
			//fprintf(stderr, "UCUT_CUT\n");
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            canvas_dopaste(x, copy_binbuf);
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		}
        else if (mode == UCUT_CLEAR) {
			//fprintf(stderr, "UCUT_CLEAR\n");
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            canvas_dopaste(x, buf->u_objectbuf);
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		}
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        else if (mode == UCUT_TEXT)
        {
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			//fprintf(stderr, "UCUT_TEXT\n");
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            t_gobj *y1, *y2;
            glist_noselect(x);
            for (y1 = x->gl_list; y2 = y1->g_next; y1 = y2)
                ;
            if (y1)
            {
                if (!buf->u_redotextbuf)
                {
                    glist_noselect(x);
                    glist_select(x, y1);
                    buf->u_redotextbuf = canvas_docopy(x);
                    glist_noselect(x);
                }
                glist_delete(x, y1);
            }
            canvas_dopaste(x, buf->u_objectbuf);
        }
        pd_bind(&x->gl_pd, gensym("#X"));
        binbuf_eval(buf->u_reconnectbuf, 0, 0, 0);
        pd_unbind(&x->gl_pd, gensym("#X"));
    }
    else if (action == UNDO_REDO)
    {
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		//fprintf(stderr,"UNDO_REDO\n");
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        if (mode == UCUT_CUT || mode == UCUT_CLEAR)
            canvas_doclear(x);
        else if (mode == UCUT_TEXT)
        {
            t_gobj *y1, *y2;
            for (y1 = x->gl_list; y2 = y1->g_next; y1 = y2)
                ;
            if (y1)
                glist_delete(x, y1);
            canvas_dopaste(x, buf->u_redotextbuf);
            pd_bind(&x->gl_pd, gensym("#X"));
            binbuf_eval(buf->u_reconnectbuf, 0, 0, 0);
            pd_unbind(&x->gl_pd, gensym("#X"));
        }
    }
    else if (action == UNDO_FREE)
    {
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		//fprintf(stderr,"UNDO_FREE\n");
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        if (buf->u_objectbuf)
            binbuf_free(buf->u_objectbuf);
        if (buf->u_reconnectbuf)
            binbuf_free(buf->u_reconnectbuf);
        if (buf->u_redotextbuf)
            binbuf_free(buf->u_redotextbuf);
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        if (buf != NULL) t_freebytes(buf, sizeof(*buf));
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    }
}

/* --------- 3. motion, including "tidy up" and stretching ----------- */

typedef struct _undo_move_elem  
{
    int e_index;
    int e_xpix;
    int e_ypix;
} t_undo_move_elem;

typedef struct _undo_move       
{
    t_undo_move_elem *u_vec;
    int u_n;
} t_undo_move;

static int canvas_undo_already_set_move;

static void *canvas_undo_set_move(t_canvas *x, int selected)
{
    int x1, y1, x2, y2, i, indx;
    t_gobj *y;
    t_undo_move *buf =  (t_undo_move *)getbytes(sizeof(*buf));
    buf->u_n = selected ? glist_selectionindex(x, 0, 1) : glist_getindex(x, 0);
    buf->u_vec = (t_undo_move_elem *)getbytes(sizeof(*buf->u_vec) *
        (selected ? glist_selectionindex(x, 0, 1) : glist_getindex(x, 0)));
    if (selected)
    {
        for (y = x->gl_list, i = indx = 0; y; y = y->g_next, indx++)
            if (glist_isselected(x, y))
        {
            gobj_getrect(y, x, &x1, &y1, &x2, &y2);
            buf->u_vec[i].e_index = indx;
            buf->u_vec[i].e_xpix = x1;
            buf->u_vec[i].e_ypix = y1;
            i++;
        }
    }
    else
    {
        for (y = x->gl_list, indx = 0; y; y = y->g_next, indx++)
        {
            gobj_getrect(y, x, &x1, &y1, &x2, &y2);
            buf->u_vec[indx].e_index = indx;
            buf->u_vec[indx].e_xpix = x1;
            buf->u_vec[indx].e_ypix = y1;
        }
    }
    canvas_undo_already_set_move = 1;
    return (buf);
}

static void canvas_undo_move(t_canvas *x, void *z, int action)
{
    t_undo_move *buf = z;
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	t_class *cl;
	int resortin = 0, resortout = 0;
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    if (action == UNDO_UNDO || action == UNDO_REDO)
    {
        int i;
        for (i = 0; i < buf->u_n; i++)
        {
            int x1, y1, x2, y2, newx, newy;
            t_gobj *y;
            newx = buf->u_vec[i].e_xpix;
            newy = buf->u_vec[i].e_ypix;
            y = glist_nth(x, buf->u_vec[i].e_index);
            if (y)
            {
                gobj_getrect(y, x, &x1, &y1, &x2, &y2);
                gobj_displace(y, x, newx-x1, newy - y1);
                buf->u_vec[i].e_xpix = x1;
                buf->u_vec[i].e_ypix = y1;
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				cl = pd_class(&y->g_pd);
		        if (cl == vinlet_class) resortin = 1;
		        else if (cl == voutlet_class) resortout = 1;
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            }
        }
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		if (resortin) canvas_resortinlets(x);
		if (resortout) canvas_resortoutlets(x);
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    }
    else if (action == UNDO_FREE)
    {
        t_freebytes(buf->u_vec, buf->u_n * sizeof(*buf->u_vec));
        t_freebytes(buf, sizeof(*buf));
    }
}

/* --------- 4. paste (also duplicate) ----------- */

typedef struct _undo_paste      
{
    int u_index;    /* index of first object pasted */  
} t_undo_paste;

static void *canvas_undo_set_paste(t_canvas *x)
{
    t_undo_paste *buf =  (t_undo_paste *)getbytes(sizeof(*buf));
    buf->u_index = glist_getindex(x, 0);
    return (buf);
}

static void canvas_undo_paste(t_canvas *x, void *z, int action)
{
    t_undo_paste *buf = z;
    if (action == UNDO_UNDO)
    {
        t_gobj *y;
        glist_noselect(x);
        for (y = glist_nth(x, buf->u_index); y; y = y->g_next)
            glist_select(x, y);
        canvas_doclear(x);
    }
    else if (action == UNDO_REDO)
    {
        t_selection *sel;
        canvas_dopaste(x, copy_binbuf);
            /* if it was "duplicate" have to re-enact the displacement. */
        if (canvas_undo_name && canvas_undo_name[0] == 'd')
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            //for (sel = x->gl_editor->e_selection; sel; sel = sel->sel_next)
            //    gobj_displace(sel->sel_what, x, 10, 10);
			canvas_paste_xyoffset(x);
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    }
else if (action == UNDO_FREE)
        t_freebytes(buf, sizeof(*buf));
}

    /* recursively check for abstractions to reload as result of a save. 
    Don't reload the one we just saved ("except") though. */
    /*  LATER try to do the same trick for externs. */
static void glist_doreload(t_glist *gl, t_symbol *name, t_symbol *dir,
    t_gobj *except)
{
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	//fprintf(stderr,"doreload\n");
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    t_gobj *g;
    int i, nobj = glist_getindex(gl, 0);  /* number of objects */
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    int hadwindow = gl->gl_havewindow;
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    for (g = gl->gl_list, i = 0; g && i < nobj; i++)
    {
        if (g != except && pd_class(&g->g_pd) == canvas_class &&
            canvas_isabstraction((t_canvas *)g) &&
                ((t_canvas *)g)->gl_name == name &&
                    canvas_getdir((t_canvas *)g) == dir)
        {
                /* we're going to remake the object, so "g" will go stale.
                Get its index here, and afterward restore g.  Also, the
                replacement will be at the end of the list, so we don't
                do g = g->g_next in this case. */
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			//fprintf(stderr, "rebuildlicious\n");
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            int j = glist_getindex(gl, g);
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            if (!gl->gl_havewindow)
                canvas_vis(glist_getcanvas(gl), 1);
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            glist_noselect(gl);
            glist_select(gl, g);
            canvas_setundo(gl, canvas_undo_cut,
                canvas_undo_set_cut(gl, UCUT_CLEAR), "clear");
            canvas_doclear(gl);
            canvas_undo(gl);
            glist_noselect(gl);
            g = glist_nth(gl, j);
        }
        else
        {
            if (g != except && pd_class(&g->g_pd) == canvas_class)
                glist_doreload((t_canvas *)g, name, dir, except);
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             	g = g->g_next;
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        }
    }
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    if (!hadwindow && gl->gl_havewindow)
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        canvas_vis(glist_getcanvas(gl), 0);
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}

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    /* this flag stops canvases from being marked "dirty" if we have to touch
    them to reload an abstraction; also suppress window list update */
int glist_amreloadingabstractions = 0;

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    /* call canvas_doreload on everyone */
void canvas_reload(t_symbol *name, t_symbol *dir, t_gobj *except)
{
    t_canvas *x;
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    int dspwas = canvas_suspend_dsp();
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    glist_amreloadingabstractions = 1;
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        /* find all root canvases */
    for (x = canvas_list; x; x = x->gl_next)
        glist_doreload(x, name, dir, except);
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    glist_amreloadingabstractions = 0;
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    canvas_resume_dsp(dspwas);
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}

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/* --------- 5. apply  ----------- */

typedef struct _undo_apply        
{
    t_binbuf *u_objectbuf;      /* the object cleared or typed into */
    t_binbuf *u_reconnectbuf;   /* connections into and out of object */
	int u_index;				/* index of the previous object */
} t_undo_apply;

static void *canvas_undo_set_apply(t_canvas *x, t_gobj *obj)
{
    t_undo_apply *buf;
    t_gobj *y;
    t_linetraverser t;
    t_outconnect *oc;
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	/* enable editor (in case it is disabled) and select the object we are working on */
	if (!x->gl_edit)
		canvas_editmode(x, 1);
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	if (!glist_isselected(x, obj))
		glist_select(x, obj);
    int nnotsel= glist_selectionindex(x, 0, 0); /* get number of all items for the offset below */
    buf = (t_undo_apply *)getbytes(sizeof(*buf));

    /* store connections into/out of the selection */
    buf->u_reconnectbuf = binbuf_new();
    linetraverser_start(&t, x);
    while (oc = linetraverser_next(&t))
    {
        int issel1 = glist_isselected(x, &t.tr_ob->ob_g);
        int issel2 = glist_isselected(x, &t.tr_ob2->ob_g);
        if (issel1 != issel2)
        {
            binbuf_addv(buf->u_reconnectbuf, "ssiiii;",
                gensym("#X"), gensym("connect"),
                (issel1 ? nnotsel : 0)
                    + glist_selectionindex(x, &t.tr_ob->ob_g, issel1),
                t.tr_outno,
                (issel2 ? nnotsel : 0) +
                    glist_selectionindex(x, &t.tr_ob2->ob_g, issel2),
                t.tr_inno);
        }
    }
	/* copy object in its current state */
    buf->u_objectbuf = canvas_docopy(x);

	/* store index of the currently selected object */
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	buf->u_index = glist_getindex(x, obj);
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    return (buf);
}

static void canvas_undo_apply(t_canvas *x, void *z, int action)
{
    t_undo_apply *buf = z;
    if (action == UNDO_UNDO || action == UNDO_REDO)
    {
		/* find current instance */
		glist_noselect(x);
		glist_select(x, glist_nth(x, buf->u_index));

		/* copy it for the new undo/redo */
		t_binbuf *tmp = canvas_docopy(x);

		/* delete current instance */
		canvas_doclear(x);

		/* replace it with previous instance */
        canvas_dopaste(x, buf->u_objectbuf);

		/* change previous instance with current one */
		buf->u_objectbuf = tmp;
		buf->u_index = glist_selectionindex(x, 0, 0);

		/* connections should stay the same */
        pd_bind(&x->gl_pd, gensym("#X"));
        binbuf_eval(buf->u_reconnectbuf, 0, 0, 0);
        pd_unbind(&x->gl_pd, gensym("#X"));
    }
    else if (action == UNDO_FREE)
    {
        if (buf->u_objectbuf)
            binbuf_free(buf->u_objectbuf);
        if (buf->u_reconnectbuf)
            binbuf_free(buf->u_reconnectbuf);
        t_freebytes(buf, sizeof(*buf));
    }
}

void canvas_apply_setundo(t_canvas *x, t_gobj *y)
{
	canvas_setundo(x, canvas_undo_apply, canvas_undo_set_apply(x, y), "apply");
}

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/* --------- 6. arrange (to front/back)  ----------- */