1 /** \file
2 * Per-desktop selection container
3 *
4 * Authors:
5 * Lauris Kaplinski <lauris@kaplinski.com>
6 * MenTaLguY <mental@rydia.net>
7 * bulia byak <buliabyak@users.sf.net>
8 * Andrius R. <knutux@gmail.com>
9 *
10 * Copyright (C) 2006 Andrius R.
11 * Copyright (C) 2004-2005 MenTaLguY
12 * Copyright (C) 1999-2002 Lauris Kaplinski
13 * Copyright (C) 2001-2002 Ximian, Inc.
14 *
15 * Released under GNU GPL, read the file 'COPYING' for more information
16 */
18 #ifdef HAVE_CONFIG_H
19 # include <config.h>
20 #endif
21 #include "macros.h"
22 #include "inkscape-private.h"
23 #include "desktop.h"
24 #include "desktop-handles.h"
25 #include "document.h"
26 #include "selection.h"
27 #include "xml/repr.h"
29 #include "sp-shape.h"
30 #include "sp-path.h"
31 #include "sp-item-group.h"
32 #include "box3d.h"
33 #include "box3d.h"
34 #include "persp3d.h"
36 #include <sigc++/functors/mem_fun.h>
38 #define SP_SELECTION_UPDATE_PRIORITY (G_PRIORITY_HIGH_IDLE + 1)
40 namespace Inkscape {
42 Selection::Selection(SPDesktop *desktop) :
43 _objs(NULL),
44 _reprs(NULL),
45 _items(NULL),
46 _desktop(desktop),
47 _selection_context(NULL),
48 _flags(0),
49 _idle(0)
50 {
51 }
53 Selection::~Selection() {
54 _clear();
55 _desktop = NULL;
56 if (_idle) {
57 g_source_remove(_idle);
58 _idle = 0;
59 }
60 }
62 /* Handler for selected objects "modified" signal */
64 void Selection::_schedule_modified(SPObject */*obj*/, guint flags) {
65 if (!this->_idle) {
66 /* Request handling to be run in _idle loop */
67 this->_idle = g_idle_add_full(SP_SELECTION_UPDATE_PRIORITY, GSourceFunc(&Selection::_emit_modified), this, NULL);
68 }
70 /* Collect all flags */
71 this->_flags |= flags;
72 }
74 gboolean
75 Selection::_emit_modified(Selection *selection)
76 {
77 /* force new handler to be created if requested before we return */
78 selection->_idle = 0;
79 guint flags = selection->_flags;
80 selection->_flags = 0;
82 selection->_emitModified(flags);
84 /* drop this handler */
85 return FALSE;
86 }
88 void Selection::_emitModified(guint flags) {
89 inkscape_selection_modified(this, flags);
90 _modified_signal.emit(this, flags);
91 }
93 void Selection::_emitChanged(bool persist_selection_context/* = false */) {
94 if (persist_selection_context) {
95 if (NULL == _selection_context) {
96 _selection_context = desktop()->currentLayer();
97 sp_object_ref(_selection_context, NULL);
98 _context_release_connection = _selection_context->connectRelease(sigc::mem_fun(*this, &Selection::_releaseContext));
99 }
100 } else {
101 _releaseContext(_selection_context);
102 }
104 inkscape_selection_changed(this);
105 _changed_signal.emit(this);
106 }
108 void
109 Selection::_releaseContext(SPObject *obj)
110 {
111 if (NULL == _selection_context || _selection_context != obj)
112 return;
114 _context_release_connection.disconnect();
116 sp_object_unref(_selection_context, NULL);
117 _selection_context = NULL;
118 }
120 void Selection::_invalidateCachedLists() {
121 g_slist_free(_items);
122 _items = NULL;
124 g_slist_free(_reprs);
125 _reprs = NULL;
126 }
128 void Selection::_clear() {
129 _invalidateCachedLists();
130 while (_objs) {
131 SPObject *obj=reinterpret_cast<SPObject *>(_objs->data);
132 _remove(obj);
133 }
134 }
136 SPObject *Selection::activeContext() {
137 if (NULL != _selection_context)
138 return _selection_context;
139 return desktop()->currentLayer();
140 }
142 bool Selection::includes(SPObject *obj) const {
143 if (obj == NULL)
144 return FALSE;
146 g_return_val_if_fail(SP_IS_OBJECT(obj), FALSE);
148 return ( g_slist_find(_objs, obj) != NULL );
149 }
151 void Selection::add(SPObject *obj, bool persist_selection_context/* = false */) {
152 g_return_if_fail(obj != NULL);
153 g_return_if_fail(SP_IS_OBJECT(obj));
155 if (includes(obj)) {
156 return;
157 }
159 _invalidateCachedLists();
160 _add(obj);
161 _emitChanged(persist_selection_context);
162 }
164 void Selection::add_box_perspective(SPBox3D *box) {
165 Persp3D *persp = box3d_get_perspective(box);
166 std::map<Persp3D *, unsigned int>::iterator p = _persps.find(persp);
167 if (p != _persps.end()) {
168 (*p).second++;
169 } else {
170 _persps[persp] = 1;
171 }
172 }
174 void Selection::add_3D_boxes_recursively(SPObject *obj) {
175 std::list<SPBox3D *> boxes = box3d_extract_boxes(obj);
177 for (std::list<SPBox3D *>::iterator i = boxes.begin(); i != boxes.end(); ++i) {
178 SPBox3D *box = *i;
179 box3d_add_to_selection(box);
180 _3dboxes.push_back(box);
181 add_box_perspective(box);
182 }
183 }
185 void Selection::_add(SPObject *obj) {
186 // unselect any of the item's ancestors and descendants which may be selected
187 // (to prevent double-selection)
188 _removeObjectDescendants(obj);
189 _removeObjectAncestors(obj);
191 _objs = g_slist_prepend(_objs, obj);
193 add_3D_boxes_recursively(obj);
195 if (SP_IS_LPE_ITEM(obj)) {
196 sp_lpe_item_add_temporary_canvasitems(SP_LPE_ITEM(obj), desktop());
197 }
199 _release_connections[obj] = obj->connectRelease(sigc::mem_fun(*this, (void (Selection::*)(SPObject *))&Selection::remove));
200 _modified_connections[obj] = obj->connectModified(sigc::mem_fun(*this, &Selection::_schedule_modified));
201 }
203 void Selection::set(SPObject *object, bool persist_selection_context) {
204 _clear();
205 add(object, persist_selection_context);
206 }
208 void Selection::toggle(SPObject *obj) {
209 if (includes (obj)) {
210 remove (obj);
211 } else {
212 add(obj);
213 }
214 }
216 void Selection::remove(SPObject *obj) {
217 g_return_if_fail(obj != NULL);
218 g_return_if_fail(SP_IS_OBJECT(obj));
219 g_return_if_fail(includes(obj));
221 _invalidateCachedLists();
222 _remove(obj);
223 _emitChanged();
224 }
226 void Selection::remove_box_perspective(SPBox3D *box) {
227 Persp3D *persp = box3d_get_perspective(box);
228 std::map<Persp3D *, unsigned int>::iterator p = _persps.find(persp);
229 if (p == _persps.end()) {
230 g_print ("Warning! Trying to remove unselected perspective from selection!\n");
231 return;
232 }
233 if ((*p).second > 1) {
234 _persps[persp]--;
235 } else {
236 _persps.erase(p);
237 }
238 }
240 void Selection::remove_3D_boxes_recursively(SPObject *obj) {
241 std::list<SPBox3D *> boxes = box3d_extract_boxes(obj);
243 for (std::list<SPBox3D *>::iterator i = boxes.begin(); i != boxes.end(); ++i) {
244 SPBox3D *box = *i;
245 box3d_remove_from_selection(box);
246 std::list<SPBox3D *>::iterator b = std::find(_3dboxes.begin(), _3dboxes.end(), box);
247 if (b == _3dboxes.end()) {
248 g_print ("Warning! Trying to remove unselected box from selection.\n");
249 return;
250 }
251 _3dboxes.erase(b);
252 remove_box_perspective(box);
253 }
254 }
256 void Selection::_remove(SPObject *obj) {
257 _modified_connections[obj].disconnect();
258 _modified_connections.erase(obj);
260 _release_connections[obj].disconnect();
261 _release_connections.erase(obj);
263 remove_3D_boxes_recursively(obj);
265 if (SP_IS_LPE_ITEM(obj)) {
266 sp_lpe_item_remove_temporary_canvasitems(SP_LPE_ITEM(obj), desktop());
267 }
269 _objs = g_slist_remove(_objs, obj);
270 }
272 void Selection::setList(GSList const *list) {
273 _clear();
275 if ( list != NULL ) {
276 for ( GSList const *iter = list ; iter != NULL ; iter = iter->next ) {
277 _add(reinterpret_cast<SPObject *>(iter->data));
278 }
279 }
281 _emitChanged();
282 }
284 void Selection::addList(GSList const *list) {
286 if (list == NULL)
287 return;
289 _invalidateCachedLists();
291 for ( GSList const *iter = list ; iter != NULL ; iter = iter->next ) {
292 SPObject *obj = reinterpret_cast<SPObject *>(iter->data);
293 if (includes(obj)) {
294 continue;
295 }
296 _add (obj);
297 }
299 _emitChanged();
300 }
302 void Selection::setReprList(GSList const *list) {
303 _clear();
305 for ( GSList const *iter = list ; iter != NULL ; iter = iter->next ) {
306 SPObject *obj=_objectForXMLNode(reinterpret_cast<Inkscape::XML::Node *>(iter->data));
307 if (obj) {
308 _add(obj);
309 }
310 }
312 _emitChanged();
313 }
315 void Selection::clear() {
316 _clear();
317 _emitChanged();
318 }
320 GSList const *Selection::list() {
321 return _objs;
322 }
324 GSList const *Selection::itemList() {
325 if (_items) {
326 return _items;
327 }
329 for ( GSList const *iter=_objs ; iter != NULL ; iter = iter->next ) {
330 SPObject *obj=reinterpret_cast<SPObject *>(iter->data);
331 if (SP_IS_ITEM(obj)) {
332 _items = g_slist_prepend(_items, SP_ITEM(obj));
333 }
334 }
335 _items = g_slist_reverse(_items);
337 return _items;
338 }
340 GSList const *Selection::reprList() {
341 if (_reprs) { return _reprs; }
343 for ( GSList const *iter=itemList() ; iter != NULL ; iter = iter->next ) {
344 SPObject *obj=reinterpret_cast<SPObject *>(iter->data);
345 _reprs = g_slist_prepend(_reprs, SP_OBJECT_REPR(obj));
346 }
347 _reprs = g_slist_reverse(_reprs);
349 return _reprs;
350 }
352 std::list<Persp3D *> const Selection::perspList() {
353 std::list<Persp3D *> pl;
354 for (std::map<Persp3D *, unsigned int>::iterator p = _persps.begin(); p != _persps.end(); ++p) {
355 pl.push_back((*p).first);
356 }
357 return pl;
358 }
360 std::list<SPBox3D *> const Selection::box3DList() {
361 return _3dboxes;
362 }
364 SPObject *Selection::single() {
365 if ( _objs != NULL && _objs->next == NULL ) {
366 return reinterpret_cast<SPObject *>(_objs->data);
367 } else {
368 return NULL;
369 }
370 }
372 SPItem *Selection::singleItem() {
373 GSList const *items=itemList();
374 if ( items != NULL && items->next == NULL ) {
375 return reinterpret_cast<SPItem *>(items->data);
376 } else {
377 return NULL;
378 }
379 }
381 Inkscape::XML::Node *Selection::singleRepr() {
382 SPObject *obj=single();
383 return obj ? SP_OBJECT_REPR(obj) : NULL;
384 }
386 NRRect *Selection::bounds(NRRect *bbox, SPItem::BBoxType type) const
387 {
388 g_return_val_if_fail (bbox != NULL, NULL);
389 *bbox = NRRect(bounds(type));
390 return bbox;
391 }
393 NR::Maybe<NR::Rect> Selection::bounds(SPItem::BBoxType type) const
394 {
395 GSList const *items = const_cast<Selection *>(this)->itemList();
397 NR::Maybe<NR::Rect> bbox = NR::Nothing();
398 for ( GSList const *i = items ; i != NULL ; i = i->next ) {
399 bbox = NR::union_bounds(bbox, sp_item_bbox_desktop(SP_ITEM(i->data), type));
400 }
401 return bbox;
402 }
404 NRRect *Selection::boundsInDocument(NRRect *bbox, SPItem::BBoxType type) const {
405 g_return_val_if_fail (bbox != NULL, NULL);
407 GSList const *items=const_cast<Selection *>(this)->itemList();
408 if (!items) {
409 bbox->x0 = bbox->y0 = bbox->x1 = bbox->y1 = 0.0;
410 return bbox;
411 }
413 bbox->x0 = bbox->y0 = 1e18;
414 bbox->x1 = bbox->y1 = -1e18;
416 for ( GSList const *iter=items ; iter != NULL ; iter = iter->next ) {
417 SPItem *item=SP_ITEM(iter->data);
418 NR::Matrix i2doc(from_2geom(sp_item_i2doc_affine(item)));
419 sp_item_invoke_bbox(item, bbox, i2doc, FALSE, type);
420 }
422 return bbox;
423 }
425 NR::Maybe<NR::Rect> Selection::boundsInDocument(SPItem::BBoxType type) const {
426 NRRect r;
427 return boundsInDocument(&r, type)->upgrade();
428 }
430 /** Extract the position of the center from the first selected object */
431 NR::Maybe<NR::Point> Selection::center() const {
432 GSList *items = (GSList *) const_cast<Selection *>(this)->itemList();
433 NR::Point center;
434 if (items) {
435 SPItem *first = reinterpret_cast<SPItem*>(g_slist_last(items)->data); // from the first item in selection
436 if (first->isCenterSet()) { // only if set explicitly
437 return first->getCenter();
438 }
439 }
440 NR::Maybe<NR::Rect> bbox = bounds();
441 if (bbox) {
442 return bounds()->midpoint();
443 } else {
444 return NR::Nothing();
445 }
446 }
448 /**
449 * Compute the list of points in the selection that are to be considered for snapping.
450 */
451 std::vector<NR::Point> Selection::getSnapPoints(bool includeItemCenter) const {
452 GSList const *items = const_cast<Selection *>(this)->itemList();
453 std::vector<NR::Point> p;
454 for (GSList const *iter = items; iter != NULL; iter = iter->next) {
455 SPItem *this_item = SP_ITEM(iter->data);
456 sp_item_snappoints(this_item, false, SnapPointsIter(p));
457 //Include the transformation origin for snapping
458 //For a group only the group's origin is considered
459 if (includeItemCenter) {
460 p.push_back(this_item->getCenter());
461 }
462 }
464 return p;
465 }
467 std::vector<NR::Point> Selection::getSnapPointsConvexHull() const {
468 GSList const *items = const_cast<Selection *>(this)->itemList();
470 std::vector<NR::Point> p;
471 for (GSList const *iter = items; iter != NULL; iter = iter->next) {
472 sp_item_snappoints(SP_ITEM(iter->data), false, SnapPointsIter(p));
473 }
475 std::vector<NR::Point> pHull;
476 if (!p.empty()) {
477 std::vector<NR::Point>::iterator i;
478 NR::ConvexHull cvh(p.front());
479 for (i = p.begin(); i != p.end(); i++) {
480 // these are the points we get back
481 cvh.add(*i);
482 }
484 NR::Maybe<NR::Rect> rHull = cvh.bounds();
485 if (rHull) {
486 for ( unsigned i = 0 ; i < 4 ; ++i ) {
487 pHull.push_back(rHull->corner(i));
488 }
489 }
490 }
492 return pHull;
493 }
495 void Selection::_removeObjectDescendants(SPObject *obj) {
496 GSList *iter, *next;
497 for ( iter = _objs ; iter ; iter = next ) {
498 next = iter->next;
499 SPObject *sel_obj=reinterpret_cast<SPObject *>(iter->data);
500 SPObject *parent=SP_OBJECT_PARENT(sel_obj);
501 while (parent) {
502 if ( parent == obj ) {
503 _remove(sel_obj);
504 break;
505 }
506 parent = SP_OBJECT_PARENT(parent);
507 }
508 }
509 }
511 void Selection::_removeObjectAncestors(SPObject *obj) {
512 SPObject *parent=SP_OBJECT_PARENT(obj);
513 while (parent) {
514 if (includes(parent)) {
515 _remove(parent);
516 }
517 parent = SP_OBJECT_PARENT(parent);
518 }
519 }
521 SPObject *Selection::_objectForXMLNode(Inkscape::XML::Node *repr) const {
522 g_return_val_if_fail(repr != NULL, NULL);
523 gchar const *id = repr->attribute("id");
524 g_return_val_if_fail(id != NULL, NULL);
525 SPObject *object=sp_desktop_document(_desktop)->getObjectById(id);
526 g_return_val_if_fail(object != NULL, NULL);
527 return object;
528 }
530 guint Selection::numberOfLayers() {
531 GSList const *items = const_cast<Selection *>(this)->itemList();
532 GSList *layers = NULL;
533 for (GSList const *iter = items; iter != NULL; iter = iter->next) {
534 SPObject *layer = desktop()->layerForObject(SP_OBJECT(iter->data));
535 if (g_slist_find (layers, layer) == NULL) {
536 layers = g_slist_prepend (layers, layer);
537 }
538 }
539 guint ret = g_slist_length (layers);
540 g_slist_free (layers);
541 return ret;
542 }
544 guint Selection::numberOfParents() {
545 GSList const *items = const_cast<Selection *>(this)->itemList();
546 GSList *parents = NULL;
547 for (GSList const *iter = items; iter != NULL; iter = iter->next) {
548 SPObject *parent = SP_OBJECT_PARENT(iter->data);
549 if (g_slist_find (parents, parent) == NULL) {
550 parents = g_slist_prepend (parents, parent);
551 }
552 }
553 guint ret = g_slist_length (parents);
554 g_slist_free (parents);
555 return ret;
556 }
558 }
560 /*
561 Local Variables:
562 mode:c++
563 c-file-style:"stroustrup"
564 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
565 indent-tabs-mode:nil
566 fill-column:99
567 End:
568 */
569 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :