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 "node-context.h"
27 #include "xml/node-event-vector.h"
28 #include "prefs-utils.h"
29 #include "object-edit.h"
30 #include "splivarot.h"
31 #include "style.h"
33 #include "shape-editor.h"
36 ShapeEditorsCollective::ShapeEditorsCollective(SPDesktop */*dt*/) {
37 }
39 ShapeEditorsCollective::~ShapeEditorsCollective() {
40 }
43 void ShapeEditorsCollective::update_statusbar() {
45 //!!! move from nodepath: sp_nodepath_update_statusbar but summing for all nodepaths
47 }
49 ShapeEditor::ShapeEditor(SPDesktop *dt) {
50 this->desktop = dt;
51 this->grab_node = -1;
52 this->nodepath = NULL;
53 this->knotholder = NULL;
54 this->hit = false;
55 }
57 ShapeEditor::~ShapeEditor() {
58 unset_item(SH_KNOTHOLDER);
59 unset_item(SH_NODEPATH);
60 }
62 void ShapeEditor::unset_item(SubType type, bool keep_knotholder) {
63 Inkscape::XML::Node *old_repr = NULL;
65 switch (type) {
66 case SH_NODEPATH:
67 if (this->nodepath) {
68 old_repr = this->nodepath->repr;
69 sp_repr_remove_listener_by_data(old_repr, this);
70 Inkscape::GC::release(old_repr);
72 this->grab_node = -1;
73 sp_nodepath_destroy(this->nodepath);
74 this->nodepath = NULL;
75 }
76 break;
77 case SH_KNOTHOLDER:
78 if (this->knotholder) {
79 old_repr = this->knotholder->repr;
80 sp_repr_remove_listener_by_data(old_repr, this);
81 Inkscape::GC::release(old_repr);
83 if (!keep_knotholder) {
84 delete this->knotholder;
85 this->knotholder = NULL;
86 }
87 }
88 break;
89 }
90 }
92 bool ShapeEditor::has_nodepath () {
93 return (this->nodepath != NULL);
94 }
96 bool ShapeEditor::has_knotholder () {
97 return (this->knotholder != NULL);
98 }
100 void ShapeEditor::update_knotholder () {
101 if (this->knotholder)
102 this->knotholder->update_knots();
103 }
105 bool ShapeEditor::has_local_change (SubType type) {
106 switch (type) {
107 case SH_NODEPATH:
108 return (this->nodepath && this->nodepath->local_change);
109 case SH_KNOTHOLDER:
110 return (this->knotholder && this->knotholder->local_change != 0);
111 default:
112 g_assert_not_reached();
113 }
114 }
116 void ShapeEditor::decrement_local_change (SubType type) {
117 switch (type) {
118 case SH_NODEPATH:
119 if (this->nodepath && this->nodepath->local_change > 0) {
120 this->nodepath->local_change--;
121 }
122 break;
123 case SH_KNOTHOLDER:
124 if (this->knotholder) {
125 this->knotholder->local_change = FALSE;
126 }
127 break;
128 default:
129 g_assert_not_reached();
130 }
131 }
133 SPItem *ShapeEditor::get_item (SubType type) {
134 SPItem *item = NULL;
135 switch (type) {
136 case SH_NODEPATH:
137 if (this->has_nodepath()) {
138 item = this->nodepath->item;
139 }
140 break;
141 case SH_KNOTHOLDER:
142 if (this->has_knotholder()) {
143 item = this->nodepath->item;
144 }
145 break;
146 }
147 return item;
148 }
150 GList *ShapeEditor::save_nodepath_selection () {
151 if (this->nodepath)
152 return ::save_nodepath_selection (this->nodepath);
153 return NULL;
154 }
156 void ShapeEditor::restore_nodepath_selection (GList *saved) {
157 if (this->nodepath && saved)
158 ::restore_nodepath_selection (this->nodepath, saved);
159 }
161 bool ShapeEditor::nodepath_edits_repr_key(gchar const *name) {
162 if (nodepath && name) {
163 return ( !strcmp(name, nodepath->repr_key) || !strcmp(name, nodepath->repr_nodetypes_key) );
164 }
166 return false;
167 }
169 static void shapeeditor_event_attr_changed(Inkscape::XML::Node */*repr*/, gchar const *name,
170 gchar const */*old_value*/, gchar const */*new_value*/,
171 bool /*is_interactive*/, gpointer data)
172 {
173 gboolean changed_np = FALSE;
174 gboolean changed_kh = FALSE;
176 g_assert(data);
177 ShapeEditor *sh = ((ShapeEditor *) data);
179 if (sh->has_nodepath() && sh->nodepath_edits_repr_key(name))
180 {
181 changed_np = !sh->has_local_change(SH_NODEPATH);
182 sh->decrement_local_change(SH_NODEPATH);
184 }
186 if (changed_np) {
187 GList *saved = NULL;
188 if (sh->has_nodepath()) {
189 saved = sh->save_nodepath_selection();
190 }
192 sh->reset_item(SH_NODEPATH);
194 if (sh->has_nodepath() && saved) {
195 sh->restore_nodepath_selection(saved);
196 g_list_free (saved);
197 }
198 }
201 if (sh->has_knotholder())
202 {
203 changed_kh = !sh->has_local_change(SH_KNOTHOLDER);
204 sh->decrement_local_change(SH_KNOTHOLDER);
205 if (changed_kh) {
206 // this can happen if an LPEItem's knotholder handle was dragged, in which case we want
207 // to keep the knotholder; in all other cases (e.g., if the LPE itself changes) we delete it
208 sh->reset_item(SH_KNOTHOLDER, !strcmp(name, "d"));
209 }
210 }
212 sh->update_statusbar(); //TODO: sh->get_container()->update_statusbar();
213 }
215 static Inkscape::XML::NodeEventVector shapeeditor_repr_events = {
216 NULL, /* child_added */
217 NULL, /* child_removed */
218 shapeeditor_event_attr_changed,
219 NULL, /* content_changed */
220 NULL /* order_changed */
221 };
224 void ShapeEditor::set_item(SPItem *item, SubType type, bool keep_knotholder) {
225 // this happens (and should only happen) when for an LPEItem having both knotholder and nodepath the knotholder
226 // is adapted; in this case we don't want to delete the knotholder since this freezes the handles
227 unset_item(type, keep_knotholder);
229 this->grab_node = -1;
231 if (item) {
232 Inkscape::XML::Node *repr;
233 switch(type) {
234 case SH_NODEPATH:
235 if (SP_IS_LPE_ITEM(item)) {
236 //SPLPEItem *lpeitem = SP_LPE_ITEM(item);
237 //Inkscape::LivePathEffect::Effect *lpe = sp_lpe_item_get_current_lpe(lpeitem);
238 //if (!(lpe && lpe->isVisible() && lpe->providesKnotholder())) {
239 // only create nodepath if the item either doesn't have an LPE
240 // or the LPE is invisible or it doesn't provide a knotholder itself
241 this->nodepath = sp_nodepath_new(desktop, item,
242 (prefs_get_int_attribute("tools.nodes", "show_handles", 1) != 0));
243 //} else if (lpe && lpe->isVisible()) {
244 // sp_lpe_item_add_temporary_canvasitems(lpeitem, desktop);
245 //}
246 }
247 if (this->nodepath) {
248 this->nodepath->shape_editor = this;
250 // setting new listener
251 repr = SP_OBJECT_REPR(item);
252 Inkscape::GC::anchor(repr);
253 sp_repr_add_listener(repr, &shapeeditor_repr_events, this);
254 }
255 break;
257 case SH_KNOTHOLDER:
258 if (!this->knotholder) {
259 // only recreate knotholder if none is present
260 this->knotholder = sp_item_knot_holder(item, desktop);
261 }
262 if (this->knotholder) {
263 this->knotholder->update_knots();
264 // setting new listener
265 repr = this->knotholder->repr;
266 Inkscape::GC::anchor(repr);
267 sp_repr_add_listener(repr, &shapeeditor_repr_events, this);
268 }
269 break;
270 }
271 }
272 }
274 /** Please note that this function only works for path parameters.
275 * All other parameters probably will crash Inkscape!
276 */
277 void ShapeEditor::set_item_lpe_path_parameter(SPItem *item, SPObject *lpeobject, const char * key)
278 {
279 unset_item(SH_NODEPATH);
281 this->grab_node = -1;
283 if (lpeobject) {
284 this->nodepath = sp_nodepath_new( desktop, lpeobject,
285 (prefs_get_int_attribute("tools.nodes", "show_handles", 1) != 0),
286 key, item);
287 if (this->nodepath) {
288 this->nodepath->shape_editor = this;
290 // setting new listener
291 Inkscape::XML::Node *repr = SP_OBJECT_REPR(lpeobject);
292 if (repr) {
293 Inkscape::GC::anchor(repr);
294 sp_repr_add_listener(repr, &shapeeditor_repr_events, this);
295 }
296 }
297 }
298 }
300 /**
301 * pass a new knotholder to ShapeEditor to manage (and delete)
302 */
303 void
304 ShapeEditor::set_knotholder(KnotHolder * knot_holder)
305 {
306 unset_item(SH_KNOTHOLDER);
308 this->grab_node = -1;
310 if (knot_holder) {
311 this->knotholder = knot_holder;
312 }
313 }
316 /** FIXME: think about this. Is this thing only called when the item needs to be updated?
317 Why not make a reload function in NodePath and in KnotHolder? */
318 void ShapeEditor::reset_item (SubType type, bool keep_knotholder)
319 {
320 switch (type) {
321 case SH_NODEPATH:
322 if ( (this->nodepath) && (IS_LIVEPATHEFFECT(this->nodepath->object)) ) {
323 SPItem * item = this->nodepath->item;
324 SPObject *obj = this->nodepath->object;
325 char * key = g_strdup(this->nodepath->repr_key);
326 set_item_lpe_path_parameter(item, obj, key); // the above checks for nodepath, so it is indeed a path that we are editing
327 g_free(key);
328 }
329 break;
330 case SH_KNOTHOLDER:
331 if (this->knotholder) {
332 SPItem * item = get_item(SH_KNOTHOLDER);
333 set_item(item, SH_KNOTHOLDER, keep_knotholder);
334 }
335 break;
336 }
337 }
339 void ShapeEditor::nodepath_destroyed () {
340 this->nodepath = NULL;
341 }
343 void ShapeEditor::update_statusbar () {
344 if (this->nodepath)
345 sp_nodepath_update_statusbar(this->nodepath);
346 }
348 bool ShapeEditor::is_over_stroke (NR::Point event_p, bool remember) {
350 if (!this->nodepath)
351 return false; // no stroke in knotholder
353 SPItem *item = get_item(SH_NODEPATH);
355 //Translate click point into proper coord system
356 this->curvepoint_doc = desktop->w2d(event_p);
357 this->curvepoint_doc *= from_2geom(sp_item_dt2i_affine(item));
359 sp_nodepath_ensure_livarot_path(this->nodepath);
361 NR::Maybe<Path::cut_position> position = get_nearest_position_on_Path(this->nodepath->livarot_path, this->curvepoint_doc);
362 if (!position) {
363 return false;
364 }
366 NR::Point nearest = get_point_on_Path(this->nodepath->livarot_path, position->piece, position->t);
367 NR::Point delta = nearest - this->curvepoint_doc;
369 delta = desktop->d2w(delta);
371 double stroke_tolerance =
372 (( !SP_OBJECT_STYLE(item)->stroke.isNone() ?
373 desktop->current_zoom() *
374 SP_OBJECT_STYLE (item)->stroke_width.computed * 0.5 *
375 NR::expansion(from_2geom(sp_item_i2d_affine(item)))
376 : 0.0)
377 + prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100)) /NR::expansion(from_2geom(sp_item_i2d_affine(item)));
378 bool close = (NR::L2 (delta) < stroke_tolerance);
380 if (remember && close) {
381 this->curvepoint_event[NR::X] = (gint) event_p [NR::X];
382 this->curvepoint_event[NR::Y] = (gint) event_p [NR::Y];
383 this->hit = true;
384 this->grab_t = position->t;
385 this->grab_node = position->piece;
386 }
388 return close;
389 }
391 void ShapeEditor::add_node_near_point() {
392 if (this->nodepath) {
393 sp_nodepath_add_node_near_point(this->nodepath, this->curvepoint_doc);
394 } else if (this->knotholder) {
395 // we do not add nodes in knotholder... yet
396 }
397 }
399 void ShapeEditor::select_segment_near_point(bool toggle) {
400 if (this->nodepath) {
401 sp_nodepath_select_segment_near_point(this->nodepath, this->curvepoint_doc, toggle);
402 }
403 if (this->knotholder) {
404 // we do not select segments in knotholder... yet?
405 }
406 }
408 void ShapeEditor::cancel_hit() {
409 this->hit = false;
410 }
412 bool ShapeEditor::hits_curve() {
413 return (this->hit);
414 }
417 void ShapeEditor::curve_drag(gdouble eventx, gdouble eventy) {
418 if (this->nodepath && !this->nodepath->straight_path) {
420 if (this->grab_node == -1) // don't know which segment to drag
421 return;
423 // We round off the extra precision in the motion coordinates provided
424 // by some input devices (like tablets). As we'll store the coordinates
425 // as integers in curvepoint_event we need to do this rounding before
426 // comparing them with the last coordinates from curvepoint_event.
427 // See bug #1593499 for details.
429 gint x = (gint) Inkscape::round(eventx);
430 gint y = (gint) Inkscape::round(eventy);
433 // The coordinates hasn't changed since the last motion event, abort
434 if (this->curvepoint_event[NR::X] == x &&
435 this->curvepoint_event[NR::Y] == y)
436 return;
438 NR::Point const delta_w(eventx - this->curvepoint_event[NR::X],
439 eventy - this->curvepoint_event[NR::Y]);
440 NR::Point const delta_dt(this->desktop->w2d(delta_w));
442 sp_nodepath_curve_drag (this->grab_node, this->grab_t, delta_dt); //!!! FIXME: which nodepath?!!! also uses current!!!
443 this->curvepoint_event[NR::X] = x;
444 this->curvepoint_event[NR::Y] = y;
446 }
447 if (this->knotholder) {
448 // we do not drag curve in knotholder
449 }
451 }
453 void ShapeEditor::finish_drag() {
454 if (this->nodepath && this->hit) {
455 sp_nodepath_update_repr (this->nodepath, _("Drag curve"));
456 }
457 }
459 void ShapeEditor::select_rect(NR::Rect const &rect, bool add) {
460 if (this->nodepath) {
461 sp_nodepath_select_rect(this->nodepath, rect, add);
462 }
463 }
465 bool ShapeEditor::has_selection() {
466 if (this->nodepath)
467 return this->nodepath->selected;
468 return false; // so far, knotholder cannot have selection
469 }
471 void ShapeEditor::deselect() {
472 if (this->nodepath)
473 sp_nodepath_deselect(this->nodepath);
474 }
476 void ShapeEditor::add_node () {
477 sp_node_selected_add_node(this->nodepath);
478 }
480 void ShapeEditor::delete_nodes () {
481 sp_node_selected_delete(this->nodepath);
482 }
484 void ShapeEditor::delete_nodes_preserving_shape () {
485 if (this->nodepath && this->nodepath->selected) {
486 sp_node_delete_preserve(g_list_copy(this->nodepath->selected));
487 }
488 }
490 void ShapeEditor::delete_segment () {
491 sp_node_selected_delete_segment(this->nodepath);
492 }
494 void ShapeEditor::set_node_type(int type) {
495 sp_node_selected_set_type(this->nodepath, (Inkscape::NodePath::NodeType) type);
496 }
498 void ShapeEditor::break_at_nodes() {
499 sp_node_selected_break(this->nodepath);
500 }
502 void ShapeEditor::join_nodes() {
503 sp_node_selected_join(this->nodepath);
504 }
506 void ShapeEditor::join_segments() {
507 sp_node_selected_join_segment(this->nodepath);
508 }
510 void ShapeEditor::duplicate_nodes() {
511 sp_node_selected_duplicate(this->nodepath);
512 }
514 void ShapeEditor::set_type_of_segments(NRPathcode code) {
515 sp_node_selected_set_line_type(this->nodepath, code);
516 }
518 void ShapeEditor::move_nodes_screen(gdouble dx, gdouble dy) {
519 sp_node_selected_move_screen(this->nodepath, dx, dy);
520 }
521 void ShapeEditor::move_nodes(gdouble dx, gdouble dy) {
522 sp_node_selected_move(this->nodepath, dx, dy);
523 }
525 void ShapeEditor::rotate_nodes(gdouble angle, int which, bool screen) {
526 if (this->nodepath)
527 sp_nodepath_selected_nodes_rotate (this->nodepath, angle, which, screen);
528 }
530 void ShapeEditor::scale_nodes(gdouble const grow, int const which) {
531 sp_nodepath_selected_nodes_scale(this->nodepath, grow, which);
532 }
533 void ShapeEditor::scale_nodes_screen(gdouble const grow, int const which) {
534 sp_nodepath_selected_nodes_scale_screen(this->nodepath, grow, which);
535 }
537 void ShapeEditor::select_all (bool invert) {
538 if (this->nodepath)
539 sp_nodepath_select_all (this->nodepath, invert);
540 }
541 void ShapeEditor::select_all_from_subpath (bool invert) {
542 if (this->nodepath)
543 sp_nodepath_select_all_from_subpath (this->nodepath, invert);
544 }
545 void ShapeEditor::select_next () {
546 if (this->nodepath) {
547 sp_nodepath_select_next (this->nodepath);
548 if (this->nodepath->numSelected() >= 1) {
549 this->desktop->scroll_to_point(&(this->nodepath->singleSelectedCoords()), 1.0);
550 }
551 }
552 }
553 void ShapeEditor::select_prev () {
554 if (this->nodepath) {
555 sp_nodepath_select_prev (this->nodepath);
556 if (this->nodepath->numSelected() >= 1) {
557 this->desktop->scroll_to_point(&(this->nodepath->singleSelectedCoords()), 1.0);
558 }
559 }
560 }
562 void ShapeEditor::show_handles (bool show) {
563 if (this->nodepath && !this->nodepath->straight_path)
564 sp_nodepath_show_handles (this->nodepath, show);
565 }
567 void ShapeEditor::show_helperpath (bool show) {
568 if (this->nodepath)
569 sp_nodepath_show_helperpath (this->nodepath, show);
570 }
572 void ShapeEditor::flip (NR::Dim2 axis, NR::Maybe<NR::Point> center) {
573 if (this->nodepath)
574 sp_nodepath_flip (this->nodepath, axis, center);
575 }
577 void ShapeEditor::distribute (NR::Dim2 axis) {
578 if (this->nodepath)
579 sp_nodepath_selected_distribute (this->nodepath, axis);
580 }
581 void ShapeEditor::align (NR::Dim2 axis) {
582 if (this->nodepath)
583 sp_nodepath_selected_align (this->nodepath, axis);
584 }
587 /*
588 Local Variables:
589 mode:c++
590 c-file-style:"stroustrup"
591 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
592 indent-tabs-mode:nil
593 fill-column:99
594 End:
595 */
596 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :