Index: exto_trdp.c
===================================================================
--- exto_trdp.c	(nonexistent)
+++ exto_trdp.c	(revision 34156)
@@ -0,0 +1,240 @@
+/*
+ *                            COPYRIGHT
+ *
+ *  pcb-rnd, interactive printed circuit board design
+ *
+ *  Extended object for teardrops; edit: line; places teardrops on end-of-line pstk
+ *  pcb-rnd Copyright (C) 2021 Tibor 'Igor2' Palinkas
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ *  Contact:
+ *    Project page: http://repo.hu/projects/pcb-rnd
+ *    lead developer: http://repo.hu/projects/pcb-rnd/contact.html
+ *    mailing list: pcb-rnd (at) list.repo.hu (send "subscribe")
+ */
+
+/* included from teardrops.c */
+
+#include "draw.h"
+#include "extobj.h"
+#include "extobj_helper.h"
+
+#define LID_EDIT 0
+
+typedef struct {
+	int dummy;
+} trdp;
+
+static void pcb_trdp_del_pre(pcb_subc_t *subc)
+{
+	trdp *trdp = subc->extobj_data;
+	rnd_trace("Trdp del_pre\n");
+
+	free(trdp);
+	subc->extobj_data = NULL;
+}
+
+static void trdp_unpack(pcb_subc_t *obj)
+{
+}
+
+/* remove all existing padstacks from the subc */
+static void trdp_clear(pcb_subc_t *subc)
+{
+	pcb_layer_t *ly = &subc->data->Layer[LID_EDIT];
+	pcb_arc_t *a, *next;
+
+	for(a = arclist_first(&ly->Arc); a != NULL; a = next) {
+		next = arclist_next(a);
+		if (PCB_FLAG_TEST(PCB_FLAG_FLOATER, a)) continue; /* do not free the floater */
+		pcb_arc_free(a);
+	}
+}
+
+static rnd_r_dir_t trdp_pstk_cb(const rnd_box_t *box, void *cl)
+{
+	teardrop_t *tr = cl;
+	pcb_pstk_t *ps = (pcb_pstk_t *)box;
+
+	if (teardrops_init_pstk(tr, ps, tr->line->parent.layer) == 0)
+		teardrop_line(cl, tr->line);
+
+	return 1;
+}
+
+/* create new teardrops on a line endpoint */
+static long trdp_gen_line_pt(pcb_board_t *pcb, pcb_subc_t *subc, pcb_line_t *line, int second)
+{
+	teardrop_t t;
+	rnd_coord_t x, y;
+	pcb_layer_t *l = pcb_layer_get_real(line->parent.layer);
+	rnd_box_t spot;
+
+	if (second) {
+		x = line->Point2.X;
+		y = line->Point2.Y;
+	}
+	else {
+		x = line->Point1.X;
+		y = line->Point1.Y;
+	}
+
+	t.pcb = pcb;
+	t.new_arcs = 0;
+	t.line = line;
+TODO("need to create arcs within the exto subc");
+	t.layer = 0;
+
+	spot.X1 = x - 10;
+	spot.Y1 = y - 10;
+	spot.X2 = x + 10;
+	spot.Y2 = y + 10;
+
+	rnd_r_search(pcb->Data->padstack_tree, &spot, NULL, trdp_pstk_cb, &t, NULL);
+	return t.new_arcs;
+}
+
+static int trdp_gen(pcb_subc_t *subc, pcb_any_obj_t *edit_obj)
+{
+	pcb_layer_t *ly = &subc->data->Layer[LID_EDIT];
+	pcb_line_t *edit_line;
+	pcb_board_t *pcb = pcb_data_get_top(subc->data);
+
+	if (subc->extobj_data == NULL)
+		trdp_unpack(subc);
+
+TODO("enable this if we have data");
+#if 0
+	trdp *trdp;
+	trdp = subc->extobj_data;
+#endif
+
+	pcb_exto_regen_begin(subc);
+
+
+	edit_line = linelist_first(&ly->Line);
+	trdp_gen_line_pt(pcb, subc, edit_line, 0);
+	trdp_gen_line_pt(pcb, subc, edit_line, 1);
+
+TODO("move origin to focal point");
+#if 0
+	{
+		pcb_layer_t *ly = &subc->data->Layer[LID_EDIT];
+		line_geo_def;
+		line = linelist_first(&ly->Line);
+		line_geo_calc(line);
+		pcb_subc_move_origin_to(subc, line->Point1.X - dy * PCB_SUBC_AUX_UNIT, line->Point1.Y + dx * PCB_SUBC_AUX_UNIT, 0);
+	}
+#endif
+
+	return pcb_exto_regen_end(subc);
+}
+
+static void pcb_trdp_draw_mark(pcb_draw_info_t *info, pcb_subc_t *subc)
+{
+	pcb_exto_draw_mark(info, subc);
+}
+
+
+static void pcb_trdp_float_pre(pcb_subc_t *subc, pcb_any_obj_t *edit_obj)
+{
+	rnd_trace("Trdp: edit pre %ld %ld\n", subc->ID, edit_obj->ID);
+	trdp_clear(subc);
+}
+
+static void pcb_trdp_float_geo(pcb_subc_t *subc, pcb_any_obj_t *edit_obj)
+{
+	rnd_trace("Trdp: edit geo %ld %ld\n", subc->ID, edit_obj == NULL ? -1 : edit_obj->ID);
+	trdp_gen(subc, edit_obj);
+}
+
+static pcb_extobj_new_t pcb_trdp_float_new(pcb_subc_t *subc, pcb_any_obj_t *floater)
+{
+	rnd_trace("Trdp: float new %ld %ld\n", subc->ID, floater->ID);
+	return PCB_EXTONEW_FLOATER;
+}
+
+static pcb_extobj_del_t pcb_trdp_float_del(pcb_subc_t *subc, pcb_any_obj_t *floater)
+{
+	return PCB_EXTODEL_SUBC;
+}
+
+
+static void pcb_trdp_chg_attr(pcb_subc_t *subc, const char *key, const char *value)
+{
+	rnd_trace("Trdp chg_attr\n");
+	if (strncmp(key, "extobj::", 8) == 0) {
+		trdp_clear(subc);
+		trdp_unpack(subc);
+		trdp_gen(subc, NULL);
+	}
+}
+
+
+static pcb_subc_t *pcb_trdp_conv_objs(pcb_data_t *dst, vtp0_t *objs, pcb_subc_t *copy_from)
+{
+	pcb_subc_t *subc;
+	pcb_line_t *l;
+	pcb_layer_t *ly;
+	pcb_dflgmap_t layers[] = {
+		{"edit", PCB_LYT_DOC, "extobj", 0, 0},
+		{NULL, 0, NULL, 0, 0}
+	};
+
+	rnd_trace("Trdp: conv_objs\n");
+
+	if (objs->used != 1)
+		return NULL; /* there must be a single line */
+
+	/* refuse anything that's not a line */
+	l = objs->array[0];
+	if (l->type != PCB_OBJ_LINE)
+		return NULL;
+
+	/* use the layer of the first object */
+	layers[0].lyt = pcb_layer_flags_(l->parent.layer);
+	pcb_layer_purpose_(l->parent.layer, &layers[0].purpose);
+
+	subc = pcb_exto_create(dst, "teardrop", layers, l->Point1.X, l->Point1.Y, 0, copy_from);
+	if (copy_from == NULL) {
+		/* set up defaults */
+/*		pcb_attribute_put(&subc->Attributes, "extobj::pitch", "4mm");*/
+	}
+
+	/* create edit-objects */
+	ly = &subc->data->Layer[LID_EDIT];
+	l = pcb_line_dup(ly, objs->array[0]);
+	PCB_FLAG_SET(PCB_FLAG_FLOATER, l);
+	PCB_FLAG_CLEAR(PCB_FLAG_SELECTED, l);
+	pcb_attribute_put(&l->Attributes, "extobj::role", "edit");
+
+	trdp_unpack(subc);
+	trdp_gen(subc, NULL);
+	return subc;
+}
+
+static pcb_extobj_t pcb_trdp = {
+	"teardrop",
+	pcb_trdp_draw_mark,
+	pcb_trdp_float_pre,
+	pcb_trdp_float_geo,
+	pcb_trdp_float_new,
+	pcb_trdp_float_del,
+	pcb_trdp_chg_attr,
+	pcb_trdp_del_pre,
+	pcb_trdp_conv_objs,
+	NULL
+};
Index: teardrops.c
===================================================================
--- teardrops.c	(revision 34155)
+++ teardrops.c	(revision 34156)
@@ -41,6 +41,7 @@
 typedef struct {
 	pcb_board_t *pcb;
 	pcb_pstk_t *pstk; /* for the search only, not really used in the arc calculations */
+	pcb_line_t *line; /* for the search only, not really used in the arc calculations */
 	rnd_layer_id_t layer;
 	rnd_coord_t px, py;
 	rnd_coord_t thickness;
@@ -289,6 +290,8 @@
 	return 0;
 }
 
+#include "exto_trdp.c"
+
 static rnd_action_t teardrops_action_list[] = {
 	{"Teardrops", pcb_act_teardrops, NULL, NULL}
 };
@@ -300,6 +303,7 @@
 void pplg_uninit_teardrops(void)
 {
 	rnd_remove_actions_by_cookie(teardrops_cookie);
+	pcb_extobj_unreg(&pcb_trdp);
 }
 
 int pplg_init_teardrops(void)
@@ -306,5 +310,6 @@
 {
 	RND_API_CHK_VER;
 	RND_REGISTER_ACTIONS(teardrops_action_list, teardrops_cookie);
+	pcb_extobj_reg(&pcb_trdp);
 	return 0;
 }