1 #define __SHAPE_EDITOR_CPP__
3 /*
4 * Inkscape::ShapeEditor
5 *
6 * Authors:
7 * bulia byak <buliabyak@users.sf.net>
8 *
9 */
11 #ifdef HAVE_CONFIG_H
12 #include "config.h"
13 #endif
15 #include <string.h>
16 #include <glibmm/i18n.h>
18 #include "sp-object.h"
19 #include "sp-item.h"
20 #include "live_effects/lpeobject.h"
21 #include "selection.h"
22 #include "desktop.h"
23 #include "desktop-handles.h"
24 #include "knotholder.h"
25 #include "live_effects/parameter/pointparam-knotholder.h"
26 #include "nodepath.h"
27 #include "xml/node-event-vector.h"
28 #include "prefs-utils.h"
29 #include "object-edit.h"
30 #include "style.h"
31 #include "display/curve.h"
32 #include <2geom/pathvector.h>
33 #include "sp-shape.h"
35 #include "shape-editor.h"
38 ShapeEditorsCollective::ShapeEditorsCollective(SPDesktop */*dt*/) {
39 }
41 ShapeEditorsCollective::~ShapeEditorsCollective() {
42 }
45 void ShapeEditorsCollective::update_statusbar() {
47 //!!! move from nodepath: sp_nodepath_update_statusbar but summing for all nodepaths
49 }
51 ShapeEditor::ShapeEditor(SPDesktop *dt) {
52 this->desktop = dt;
53 this->grab_node = -1;
54 this->nodepath = NULL;
55 this->knotholder = NULL;
56 this->hit = false;
57 }
59 ShapeEditor::~ShapeEditor() {
60 unset_item(SH_KNOTHOLDER);
61 unset_item(SH_NODEPATH);
62 }
64 void ShapeEditor::unset_item(SubType type, bool keep_knotholder) {
65 Inkscape::XML::Node *old_repr = NULL;
67 switch (type) {
68 case SH_NODEPATH:
69 if (this->nodepath) {
70 old_repr = this->nodepath->repr;
71 sp_repr_remove_listener_by_data(old_repr, this);
72 Inkscape::GC::release(old_repr);
74 this->grab_node = -1;
75 sp_nodepath_destroy(this->nodepath);
76 this->nodepath = NULL;
77 }
78 break;
79 case SH_KNOTHOLDER:
80 if (this->knotholder) {
81 old_repr = this->knotholder->repr;
82 sp_repr_remove_listener_by_data(old_repr, this);
83 Inkscape::GC::release(old_repr);
85 if (!keep_knotholder) {
86 delete this->knotholder;
87 this->knotholder = NULL;
88 }
89 }
90 break;
91 }
92 }
94 bool ShapeEditor::has_nodepath () {
95 return (this->nodepath != NULL);
96 }
98 bool ShapeEditor::has_knotholder () {
99 return (this->knotholder != NULL);
100 }
102 void ShapeEditor::update_knotholder () {
103 if (this->knotholder)
104 this->knotholder->update_knots();
105 }
107 bool ShapeEditor::has_local_change (SubType type) {
108 switch (type) {
109 case SH_NODEPATH:
110 return (this->nodepath && this->nodepath->local_change);
111 case SH_KNOTHOLDER:
112 return (this->knotholder && this->knotholder->local_change != 0);
113 default:
114 g_assert_not_reached();
115 }
116 }
118 void ShapeEditor::decrement_local_change (SubType type) {
119 switch (type) {
120 case SH_NODEPATH:
121 if (this->nodepath && this->nodepath->local_change > 0) {
122 this->nodepath->local_change--;
123 }
124 break;
125 case SH_KNOTHOLDER:
126 if (this->knotholder) {
127 this->knotholder->local_change = FALSE;
128 }
129 break;
130 default:
131 g_assert_not_reached();
132 }
133 }
135 const SPItem *ShapeEditor::get_item (SubType type) {
136 const SPItem *item = NULL;
137 switch (type) {
138 case SH_NODEPATH:
139 if (this->has_nodepath()) {
140 item = this->nodepath->item;
141 }
142 break;
143 case SH_KNOTHOLDER:
144 if (this->has_knotholder()) {
145 item = this->knotholder->getItem();
146 }
147 break;
148 }
149 return item;
150 }
152 GList *ShapeEditor::save_nodepath_selection () {
153 if (this->nodepath)
154 return ::save_nodepath_selection (this->nodepath);
155 return NULL;
156 }
158 void ShapeEditor::restore_nodepath_selection (GList *saved) {
159 if (this->nodepath && saved)
160 ::restore_nodepath_selection (this->nodepath, saved);
161 }
163 bool ShapeEditor::nodepath_edits_repr_key(gchar const *name) {
164 if (nodepath && name) {
165 return ( !strcmp(name, nodepath->repr_key) || !strcmp(name, nodepath->repr_nodetypes_key) );
166 }
168 return false;
169 }
171 static void shapeeditor_event_attr_changed(Inkscape::XML::Node */*repr*/, gchar const *name,
172 gchar const */*old_value*/, gchar const */*new_value*/,
173 bool /*is_interactive*/, gpointer data)
174 {
175 gboolean changed_np = FALSE;
176 gboolean changed_kh = FALSE;
178 g_assert(data);
179 ShapeEditor *sh = ((ShapeEditor *) data);
181 if (sh->has_nodepath() && sh->nodepath_edits_repr_key(name))
182 {
183 changed_np = !sh->has_local_change(SH_NODEPATH);
184 sh->decrement_local_change(SH_NODEPATH);
186 }
188 if (changed_np) {
189 GList *saved = NULL;
190 if (sh->has_nodepath()) {
191 saved = sh->save_nodepath_selection();
192 }
194 sh->reset_item(SH_NODEPATH);
196 if (sh->has_nodepath() && saved) {
197 sh->restore_nodepath_selection(saved);
198 g_list_free (saved);
199 }
200 }
203 if (sh->has_knotholder())
204 {
205 changed_kh = !sh->has_local_change(SH_KNOTHOLDER);
206 sh->decrement_local_change(SH_KNOTHOLDER);
207 if (changed_kh) {
208 // this can happen if an LPEItem's knotholder handle was dragged, in which case we want
209 // to keep the knotholder; in all other cases (e.g., if the LPE itself changes) we delete it
210 sh->reset_item(SH_KNOTHOLDER, !strcmp(name, "d"));
211 }
212 }
214 sh->update_statusbar(); //TODO: sh->get_container()->update_statusbar();
215 }
217 static Inkscape::XML::NodeEventVector shapeeditor_repr_events = {
218 NULL, /* child_added */
219 NULL, /* child_removed */
220 shapeeditor_event_attr_changed,
221 NULL, /* content_changed */
222 NULL /* order_changed */
223 };
226 void ShapeEditor::set_item(SPItem *item, SubType type, bool keep_knotholder) {
227 // this happens (and should only happen) when for an LPEItem having both knotholder and nodepath the knotholder
228 // is adapted; in this case we don't want to delete the knotholder since this freezes the handles
229 unset_item(type, keep_knotholder);
231 this->grab_node = -1;
233 if (item) {
234 Inkscape::XML::Node *repr;
235 switch(type) {
236 case SH_NODEPATH:
237 if (SP_IS_LPE_ITEM(item)) {
238 this->nodepath = sp_nodepath_new(desktop, item, (prefs_get_int_attribute("tools.nodes", "show_handles", 1) != 0));
239 }
240 if (this->nodepath) {
241 this->nodepath->shape_editor = this;
243 // setting new listener
244 repr = SP_OBJECT_REPR(item);
245 Inkscape::GC::anchor(repr);
246 sp_repr_add_listener(repr, &shapeeditor_repr_events, this);
247 }
248 break;
250 case SH_KNOTHOLDER:
251 if (!this->knotholder) {
252 // only recreate knotholder if none is present
253 this->knotholder = sp_item_knot_holder(item, desktop);
254 }
255 if (this->knotholder) {
256 this->knotholder->update_knots();
257 // setting new listener
258 repr = this->knotholder->repr;
259 Inkscape::GC::anchor(repr);
260 sp_repr_add_listener(repr, &shapeeditor_repr_events, this);
261 }
262 break;
263 }
264 }
265 }
267 /** Please note that this function only works for path parameters.
268 * All other parameters probably will crash Inkscape!
269 */
270 void ShapeEditor::set_item_lpe_path_parameter(SPItem *item, SPObject *lpeobject, const char * key)
271 {
272 unset_item(SH_NODEPATH);
274 this->grab_node = -1;
276 if (lpeobject) {
277 this->nodepath = sp_nodepath_new( desktop, lpeobject,
278 (prefs_get_int_attribute("tools.nodes", "show_handles", 1) != 0),
279 key, item);
280 if (this->nodepath) {
281 this->nodepath->shape_editor = this;
283 // setting new listener
284 Inkscape::XML::Node *repr = SP_OBJECT_REPR(lpeobject);
285 if (repr) {
286 Inkscape::GC::anchor(repr);
287 sp_repr_add_listener(repr, &shapeeditor_repr_events, this);
288 }
289 }
290 }
291 }
293 /**
294 * pass a new knotholder to ShapeEditor to manage (and delete)
295 */
296 void
297 ShapeEditor::set_knotholder(KnotHolder * knot_holder)
298 {
299 unset_item(SH_KNOTHOLDER);
301 this->grab_node = -1;
303 if (knot_holder) {
304 this->knotholder = knot_holder;
305 }
306 }
309 /** FIXME: think about this. Is this thing only called when the item needs to be updated?
310 Why not make a reload function in NodePath and in KnotHolder? */
311 void ShapeEditor::reset_item (SubType type, bool keep_knotholder)
312 {
313 switch (type) {
314 case SH_NODEPATH:
315 if ( (this->nodepath) && (IS_LIVEPATHEFFECT(this->nodepath->object)) ) {
316 SPItem * item = this->nodepath->item;
317 SPObject *obj = this->nodepath->object;
318 char * key = g_strdup(this->nodepath->repr_key);
319 set_item_lpe_path_parameter(item, obj, key); // the above checks for nodepath, so it is indeed a path that we are editing
320 g_free(key);
321 } else {
322 SPItem * item = (SPItem *) get_item(SH_NODEPATH);
323 set_item(item, SH_NODEPATH);
324 }
325 break;
326 case SH_KNOTHOLDER:
327 if (this->knotholder) {
328 SPItem * item = (SPItem *) get_item(SH_KNOTHOLDER);
329 set_item(item, SH_KNOTHOLDER, keep_knotholder);
330 }
331 break;
332 }
333 }
335 void ShapeEditor::nodepath_destroyed () {
336 this->nodepath = NULL;
337 }
339 void ShapeEditor::update_statusbar () {
340 if (this->nodepath)
341 sp_nodepath_update_statusbar(this->nodepath);
342 }
344 bool ShapeEditor::is_over_stroke (NR::Point event_p, bool remember) {
345 if (!this->nodepath)
346 return false; // no stroke in knotholder
348 const SPItem *item = get_item(SH_NODEPATH);
350 //Translate click point into proper coord system
351 this->curvepoint_doc = desktop->w2d(event_p);
352 this->curvepoint_doc *= sp_item_dt2i_affine(item);
354 SPCurve *curve;
355 if (SP_IS_SHAPE(item)) {
356 curve = sp_shape_get_curve(SP_SHAPE(item));
357 } else {
358 this->nodepath->curve; // not sure if np->curve is always up to date...
359 }
360 Geom::PathVector const &pathv = curve->get_pathvector();
361 Geom::PathVectorPosition pvpos = Geom::nearestPoint(pathv, this->curvepoint_doc);
363 NR::Point nearest = pathv[pvpos.path_nr].pointAt(pvpos.t);
364 NR::Point delta = nearest - this->curvepoint_doc;
366 delta = desktop->d2w(delta);
368 double stroke_tolerance =
369 (( !SP_OBJECT_STYLE(item)->stroke.isNone() ?
370 desktop->current_zoom() *
371 SP_OBJECT_STYLE (item)->stroke_width.computed * 0.5 *
372 NR::expansion(sp_item_i2d_affine(item))
373 : 0.0)
374 + prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100)) /NR::expansion(sp_item_i2d_affine(item));
375 bool close = (NR::L2 (delta) < stroke_tolerance);
377 if (remember && close) {
378 // calculate index for nodepath's representation.
379 double int_part;
380 double t = std::modf(pvpos.t, &int_part);
381 unsigned int segment_index = (unsigned int)int_part + 1;
382 for (unsigned int i = 0; i < pvpos.path_nr; ++i) {
383 segment_index += pathv[i].size() + 1;
384 if (pathv[i].closed())
385 segment_index += 1;
386 }
388 this->curvepoint_event[NR::X] = (gint) event_p [NR::X];
389 this->curvepoint_event[NR::Y] = (gint) event_p [NR::Y];
390 this->hit = true;
391 this->grab_t = t;
392 this->grab_node = segment_index;
393 }
395 return close;
396 }
398 void ShapeEditor::add_node_near_point() {
399 if (this->nodepath) {
400 sp_nodepath_add_node_near_point(this->nodepath, this->curvepoint_doc);
401 } else if (this->knotholder) {
402 // we do not add nodes in knotholder... yet
403 }
404 }
406 void ShapeEditor::select_segment_near_point(bool toggle) {
407 if (this->nodepath) {
408 sp_nodepath_select_segment_near_point(this->nodepath, this->curvepoint_doc, toggle);
409 }
410 if (this->knotholder) {
411 // we do not select segments in knotholder... yet?
412 }
413 }
415 void ShapeEditor::cancel_hit() {
416 this->hit = false;
417 }
419 bool ShapeEditor::hits_curve() {
420 return (this->hit);
421 }
424 void ShapeEditor::curve_drag(gdouble eventx, gdouble eventy) {
425 if (this->nodepath && !this->nodepath->straight_path) {
427 if (this->grab_node == -1) // don't know which segment to drag
428 return;
430 // We round off the extra precision in the motion coordinates provided
431 // by some input devices (like tablets). As we'll store the coordinates
432 // as integers in curvepoint_event we need to do this rounding before
433 // comparing them with the last coordinates from curvepoint_event.
434 // See bug #1593499 for details.
436 gint x = (gint) Inkscape::round(eventx);
437 gint y = (gint) Inkscape::round(eventy);
440 // The coordinates hasn't changed since the last motion event, abort
441 if (this->curvepoint_event[NR::X] == x &&
442 this->curvepoint_event[NR::Y] == y)
443 return;
445 NR::Point const delta_w(eventx - this->curvepoint_event[NR::X],
446 eventy - this->curvepoint_event[NR::Y]);
447 NR::Point const delta_dt(this->desktop->w2d(delta_w));
449 sp_nodepath_curve_drag (this->nodepath, this->grab_node, this->grab_t, delta_dt);
450 this->curvepoint_event[NR::X] = x;
451 this->curvepoint_event[NR::Y] = y;
453 }
454 if (this->knotholder) {
455 // we do not drag curve in knotholder
456 }
458 }
460 void ShapeEditor::finish_drag() {
461 if (this->nodepath && this->hit) {
462 sp_nodepath_update_repr (this->nodepath, _("Drag curve"));
463 }
464 }
466 void ShapeEditor::select_rect(NR::Rect const &rect, bool add) {
467 if (this->nodepath) {
468 sp_nodepath_select_rect(this->nodepath, rect, add);
469 }
470 }
472 bool ShapeEditor::has_selection() {
473 if (this->nodepath)
474 return this->nodepath->selected;
475 return false; // so far, knotholder cannot have selection
476 }
478 void ShapeEditor::deselect() {
479 if (this->nodepath)
480 sp_nodepath_deselect(this->nodepath);
481 }
483 void ShapeEditor::add_node () {
484 sp_node_selected_add_node(this->nodepath);
485 }
487 void ShapeEditor::delete_nodes () {
488 sp_node_selected_delete(this->nodepath);
489 }
491 void ShapeEditor::delete_nodes_preserving_shape () {
492 if (this->nodepath && this->nodepath->selected) {
493 sp_node_delete_preserve(g_list_copy(this->nodepath->selected));
494 }
495 }
497 void ShapeEditor::delete_segment () {
498 sp_node_selected_delete_segment(this->nodepath);
499 }
501 void ShapeEditor::set_node_type(int type) {
502 sp_node_selected_set_type(this->nodepath, (Inkscape::NodePath::NodeType) type);
503 }
505 void ShapeEditor::break_at_nodes() {
506 sp_node_selected_break(this->nodepath);
507 }
509 void ShapeEditor::join_nodes() {
510 sp_node_selected_join(this->nodepath);
511 }
513 void ShapeEditor::join_segments() {
514 sp_node_selected_join_segment(this->nodepath);
515 }
517 void ShapeEditor::duplicate_nodes() {
518 sp_node_selected_duplicate(this->nodepath);
519 }
521 void ShapeEditor::set_type_of_segments(NRPathcode code) {
522 sp_node_selected_set_line_type(this->nodepath, code);
523 }
525 void ShapeEditor::move_nodes_screen(SPDesktop *desktop, gdouble dx, gdouble dy) {
526 sp_node_selected_move_screen(desktop, this->nodepath, dx, dy);
527 }
528 void ShapeEditor::move_nodes(gdouble dx, gdouble dy) {
529 sp_node_selected_move(this->nodepath, dx, dy);
530 }
532 void ShapeEditor::rotate_nodes(gdouble angle, int which, bool screen) {
533 if (this->nodepath)
534 sp_nodepath_selected_nodes_rotate (this->nodepath, angle, which, screen);
535 }
537 void ShapeEditor::scale_nodes(gdouble const grow, int const which) {
538 sp_nodepath_selected_nodes_scale(this->nodepath, grow, which);
539 }
540 void ShapeEditor::scale_nodes_screen(gdouble const grow, int const which) {
541 sp_nodepath_selected_nodes_scale_screen(this->nodepath, grow, which);
542 }
544 void ShapeEditor::select_all (bool invert) {
545 if (this->nodepath)
546 sp_nodepath_select_all (this->nodepath, invert);
547 }
548 void ShapeEditor::select_all_from_subpath (bool invert) {
549 if (this->nodepath)
550 sp_nodepath_select_all_from_subpath (this->nodepath, invert);
551 }
552 void ShapeEditor::select_next () {
553 if (this->nodepath) {
554 sp_nodepath_select_next (this->nodepath);
555 if (this->nodepath->numSelected() >= 1) {
556 this->desktop->scroll_to_point(&(this->nodepath->singleSelectedCoords()), 1.0);
557 }
558 }
559 }
560 void ShapeEditor::select_prev () {
561 if (this->nodepath) {
562 sp_nodepath_select_prev (this->nodepath);
563 if (this->nodepath->numSelected() >= 1) {
564 this->desktop->scroll_to_point(&(this->nodepath->singleSelectedCoords()), 1.0);
565 }
566 }
567 }
569 void ShapeEditor::show_handles (bool show) {
570 if (this->nodepath && !this->nodepath->straight_path)
571 sp_nodepath_show_handles (this->nodepath, show);
572 }
574 void ShapeEditor::show_helperpath (bool show) {
575 if (this->nodepath)
576 sp_nodepath_show_helperpath (this->nodepath, show);
577 }
579 void ShapeEditor::flip (NR::Dim2 axis, boost::optional<NR::Point> center) {
580 if (this->nodepath)
581 sp_nodepath_flip (this->nodepath, axis, center);
582 }
584 void ShapeEditor::distribute (NR::Dim2 axis) {
585 if (this->nodepath)
586 sp_nodepath_selected_distribute (this->nodepath, axis);
587 }
588 void ShapeEditor::align (NR::Dim2 axis) {
589 if (this->nodepath)
590 sp_nodepath_selected_align (this->nodepath, axis);
591 }
594 /*
595 Local Variables:
596 mode:c++
597 c-file-style:"stroustrup"
598 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
599 indent-tabs-mode:nil
600 fill-column:99
601 End:
602 */
603 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :