65ec9941d1cb70cbde2da75aff9f2be873b2597e
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_print ("Selection::add()\n");
153 g_return_if_fail(obj != NULL);
154 g_return_if_fail(SP_IS_OBJECT(obj));
156 if (includes(obj)) {
157 return;
158 }
160 _invalidateCachedLists();
161 _add(obj);
162 _emitChanged(persist_selection_context);
163 }
165 void Selection::add_box_perspective(SPBox3D *box) {
166 Persp3D *persp = box3d_get_perspective(box);
167 std::map<Persp3D *, unsigned int>::iterator p = _persps.find(persp);
168 if (p != _persps.end()) {
169 (*p).second++;
170 } else {
171 _persps[persp] = 1;
172 }
173 }
175 void Selection::add_3D_boxes_recursively(SPObject *obj) {
176 std::list<SPBox3D *> boxes = box3d_extract_boxes(obj);
178 for (std::list<SPBox3D *>::iterator i = boxes.begin(); i != boxes.end(); ++i) {
179 SPBox3D *box = *i;
180 box3d_add_to_selection(box);
181 _3dboxes.push_back(box);
182 add_box_perspective(box);
183 }
184 }
186 void Selection::_add(SPObject *obj) {
187 // unselect any of the item's ancestors and descendants which may be selected
188 // (to prevent double-selection)
189 _removeObjectDescendants(obj);
190 _removeObjectAncestors(obj);
192 _objs = g_slist_prepend(_objs, obj);
194 add_3D_boxes_recursively(obj);
196 _release_connections[obj] = obj->connectRelease(sigc::mem_fun(*this, (void (Selection::*)(SPObject *))&Selection::remove));
197 _modified_connections[obj] = obj->connectModified(sigc::mem_fun(*this, &Selection::_schedule_modified));
198 }
200 void Selection::set(SPObject *object, bool persist_selection_context) {
201 _clear();
202 add(object, persist_selection_context);
203 }
205 void Selection::toggle(SPObject *obj) {
206 if (includes (obj)) {
207 remove (obj);
208 } else {
209 add(obj);
210 }
211 }
213 void Selection::remove(SPObject *obj) {
214 g_print ("Selection::remove()\n");
215 g_return_if_fail(obj != NULL);
216 g_return_if_fail(SP_IS_OBJECT(obj));
217 g_return_if_fail(includes(obj));
219 _invalidateCachedLists();
220 _remove(obj);
221 _emitChanged();
222 }
224 void Selection::remove_box_perspective(SPBox3D *box) {
225 Persp3D *persp = box3d_get_perspective(box);
226 std::map<Persp3D *, unsigned int>::iterator p = _persps.find(persp);
227 if (p == _persps.end()) {
228 g_print ("Warning! Trying to remove unselected perspective from selection!\n");
229 return;
230 }
231 if ((*p).second > 1) {
232 _persps[persp]--;
233 } else {
234 _persps.erase(p);
235 }
236 }
238 void Selection::remove_3D_boxes_recursively(SPObject *obj) {
239 std::list<SPBox3D *> boxes = box3d_extract_boxes(obj);
241 for (std::list<SPBox3D *>::iterator i = boxes.begin(); i != boxes.end(); ++i) {
242 SPBox3D *box = *i;
243 box3d_remove_from_selection(box);
244 std::list<SPBox3D *>::iterator b = std::find(_3dboxes.begin(), _3dboxes.end(), box);
245 if (b == _3dboxes.end()) {
246 g_print ("Warning! Trying to remove unselected box from selection.\n");
247 return;
248 }
249 _3dboxes.erase(b);
250 remove_box_perspective(box);
251 }
252 }
254 void Selection::_remove(SPObject *obj) {
255 _modified_connections[obj].disconnect();
256 _modified_connections.erase(obj);
258 _release_connections[obj].disconnect();
259 _release_connections.erase(obj);
261 remove_3D_boxes_recursively(obj);
263 _objs = g_slist_remove(_objs, obj);
264 }
266 void Selection::setList(GSList const *list) {
267 _clear();
269 if ( list != NULL ) {
270 for ( GSList const *iter = list ; iter != NULL ; iter = iter->next ) {
271 _add(reinterpret_cast<SPObject *>(iter->data));
272 }
273 }
275 _emitChanged();
276 }
278 void Selection::addList(GSList const *list) {
280 if (list == NULL)
281 return;
283 _invalidateCachedLists();
285 for ( GSList const *iter = list ; iter != NULL ; iter = iter->next ) {
286 SPObject *obj = reinterpret_cast<SPObject *>(iter->data);
287 if (includes(obj)) {
288 continue;
289 }
290 _add (obj);
291 }
293 _emitChanged();
294 }
296 void Selection::setReprList(GSList const *list) {
297 _clear();
299 for ( GSList const *iter = list ; iter != NULL ; iter = iter->next ) {
300 SPObject *obj=_objectForXMLNode(reinterpret_cast<Inkscape::XML::Node *>(iter->data));
301 if (obj) {
302 _add(obj);
303 }
304 }
306 _emitChanged();
307 }
309 void Selection::clear() {
310 _clear();
311 _emitChanged();
312 }
314 GSList const *Selection::list() {
315 return _objs;
316 }
318 GSList const *Selection::itemList() {
319 if (_items) {
320 return _items;
321 }
323 for ( GSList const *iter=_objs ; iter != NULL ; iter = iter->next ) {
324 SPObject *obj=reinterpret_cast<SPObject *>(iter->data);
325 if (SP_IS_ITEM(obj)) {
326 _items = g_slist_prepend(_items, SP_ITEM(obj));
327 }
328 }
329 _items = g_slist_reverse(_items);
331 return _items;
332 }
334 GSList const *Selection::reprList() {
335 if (_reprs) { return _reprs; }
337 for ( GSList const *iter=itemList() ; iter != NULL ; iter = iter->next ) {
338 SPObject *obj=reinterpret_cast<SPObject *>(iter->data);
339 _reprs = g_slist_prepend(_reprs, SP_OBJECT_REPR(obj));
340 }
341 _reprs = g_slist_reverse(_reprs);
343 return _reprs;
344 }
346 std::list<Persp3D *> const Selection::perspList() {
347 std::list<Persp3D *> pl;
348 for (std::map<Persp3D *, unsigned int>::iterator p = _persps.begin(); p != _persps.end(); ++p) {
349 pl.push_back((*p).first);
350 }
351 return pl;
352 }
354 std::list<SPBox3D *> const Selection::box3DList() {
355 return _3dboxes;
356 }
358 SPObject *Selection::single() {
359 if ( _objs != NULL && _objs->next == NULL ) {
360 return reinterpret_cast<SPObject *>(_objs->data);
361 } else {
362 return NULL;
363 }
364 }
366 SPItem *Selection::singleItem() {
367 GSList const *items=itemList();
368 if ( items != NULL && items->next == NULL ) {
369 return reinterpret_cast<SPItem *>(items->data);
370 } else {
371 return NULL;
372 }
373 }
375 Inkscape::XML::Node *Selection::singleRepr() {
376 SPObject *obj=single();
377 return obj ? SP_OBJECT_REPR(obj) : NULL;
378 }
380 NRRect *Selection::bounds(NRRect *bbox, SPItem::BBoxType type) const
381 {
382 g_return_val_if_fail (bbox != NULL, NULL);
383 *bbox = NRRect(bounds(type));
384 return bbox;
385 }
387 boost::optional<NR::Rect> Selection::bounds(SPItem::BBoxType type) const
388 {
389 GSList const *items = const_cast<Selection *>(this)->itemList();
391 boost::optional<NR::Rect> bbox;
392 for ( GSList const *i = items ; i != NULL ; i = i->next ) {
393 bbox = NR::union_bounds(bbox, sp_item_bbox_desktop(SP_ITEM(i->data), type));
394 }
395 return bbox;
396 }
398 NRRect *Selection::boundsInDocument(NRRect *bbox, SPItem::BBoxType type) const {
399 g_return_val_if_fail (bbox != NULL, NULL);
401 GSList const *items=const_cast<Selection *>(this)->itemList();
402 if (!items) {
403 bbox->x0 = bbox->y0 = bbox->x1 = bbox->y1 = 0.0;
404 return bbox;
405 }
407 bbox->x0 = bbox->y0 = 1e18;
408 bbox->x1 = bbox->y1 = -1e18;
410 for ( GSList const *iter=items ; iter != NULL ; iter = iter->next ) {
411 SPItem *item=SP_ITEM(iter->data);
412 Geom::Matrix i2doc(sp_item_i2doc_affine(item));
413 sp_item_invoke_bbox(item, bbox, i2doc, FALSE, type);
414 }
416 return bbox;
417 }
419 boost::optional<NR::Rect> Selection::boundsInDocument(SPItem::BBoxType type) const {
420 NRRect r;
421 return boundsInDocument(&r, type)->upgrade();
422 }
424 /** Extract the position of the center from the first selected object */
425 boost::optional<NR::Point> Selection::center() const {
426 GSList *items = (GSList *) const_cast<Selection *>(this)->itemList();
427 NR::Point center;
428 if (items) {
429 SPItem *first = reinterpret_cast<SPItem*>(g_slist_last(items)->data); // from the first item in selection
430 if (first->isCenterSet()) { // only if set explicitly
431 return first->getCenter();
432 }
433 }
434 boost::optional<NR::Rect> bbox = bounds();
435 if (bbox) {
436 return bounds()->midpoint();
437 } else {
438 return boost::optional<NR::Point>();
439 }
440 }
442 /**
443 * Compute the list of points in the selection that are to be considered for snapping.
444 */
445 std::vector<NR::Point> Selection::getSnapPoints(bool includeItemCenter) const {
446 GSList const *items = const_cast<Selection *>(this)->itemList();
447 std::vector<NR::Point> p;
448 for (GSList const *iter = items; iter != NULL; iter = iter->next) {
449 SPItem *this_item = SP_ITEM(iter->data);
450 sp_item_snappoints(this_item, false, SnapPointsIter(p));
451 //Include the transformation origin for snapping
452 //For a group only the group's origin is considered
453 if (includeItemCenter) {
454 p.push_back(this_item->getCenter());
455 }
456 }
458 return p;
459 }
461 std::vector<NR::Point> Selection::getSnapPointsConvexHull() const {
462 GSList const *items = const_cast<Selection *>(this)->itemList();
464 std::vector<NR::Point> p;
465 for (GSList const *iter = items; iter != NULL; iter = iter->next) {
466 sp_item_snappoints(SP_ITEM(iter->data), false, SnapPointsIter(p));
467 }
469 std::vector<NR::Point> pHull;
470 if (!p.empty()) {
471 std::vector<NR::Point>::iterator i;
472 NR::ConvexHull cvh(p.front());
473 for (i = p.begin(); i != p.end(); i++) {
474 // these are the points we get back
475 cvh.add(*i);
476 }
478 boost::optional<NR::Rect> rHull = cvh.bounds();
479 if (rHull) {
480 for ( unsigned i = 0 ; i < 4 ; ++i ) {
481 pHull.push_back(rHull->corner(i));
482 }
483 }
484 }
486 return pHull;
487 }
489 void Selection::_removeObjectDescendants(SPObject *obj) {
490 GSList *iter, *next;
491 for ( iter = _objs ; iter ; iter = next ) {
492 next = iter->next;
493 SPObject *sel_obj=reinterpret_cast<SPObject *>(iter->data);
494 SPObject *parent=SP_OBJECT_PARENT(sel_obj);
495 while (parent) {
496 if ( parent == obj ) {
497 _remove(sel_obj);
498 break;
499 }
500 parent = SP_OBJECT_PARENT(parent);
501 }
502 }
503 }
505 void Selection::_removeObjectAncestors(SPObject *obj) {
506 SPObject *parent=SP_OBJECT_PARENT(obj);
507 while (parent) {
508 if (includes(parent)) {
509 _remove(parent);
510 }
511 parent = SP_OBJECT_PARENT(parent);
512 }
513 }
515 SPObject *Selection::_objectForXMLNode(Inkscape::XML::Node *repr) const {
516 g_return_val_if_fail(repr != NULL, NULL);
517 gchar const *id = repr->attribute("id");
518 g_return_val_if_fail(id != NULL, NULL);
519 SPObject *object=sp_desktop_document(_desktop)->getObjectById(id);
520 g_return_val_if_fail(object != NULL, NULL);
521 return object;
522 }
524 guint Selection::numberOfLayers() {
525 GSList const *items = const_cast<Selection *>(this)->itemList();
526 GSList *layers = NULL;
527 for (GSList const *iter = items; iter != NULL; iter = iter->next) {
528 SPObject *layer = desktop()->layerForObject(SP_OBJECT(iter->data));
529 if (g_slist_find (layers, layer) == NULL) {
530 layers = g_slist_prepend (layers, layer);
531 }
532 }
533 guint ret = g_slist_length (layers);
534 g_slist_free (layers);
535 return ret;
536 }
538 guint Selection::numberOfParents() {
539 GSList const *items = const_cast<Selection *>(this)->itemList();
540 GSList *parents = NULL;
541 for (GSList const *iter = items; iter != NULL; iter = iter->next) {
542 SPObject *parent = SP_OBJECT_PARENT(iter->data);
543 if (g_slist_find (parents, parent) == NULL) {
544 parents = g_slist_prepend (parents, parent);
545 }
546 }
547 guint ret = g_slist_length (parents);
548 g_slist_free (parents);
549 return ret;
550 }
552 }
554 /*
555 Local Variables:
556 mode:c++
557 c-file-style:"stroustrup"
558 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
559 indent-tabs-mode:nil
560 fill-column:99
561 End:
562 */
563 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :