c40b7b546346da91531deac04cb8bc8a53e437e9
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 *
9 * Copyright (C) 2004-2005 MenTaLguY
10 * Copyright (C) 1999-2002 Lauris Kaplinski
11 * Copyright (C) 2001-2002 Ximian, Inc.
12 *
13 * Released under GNU GPL, read the file 'COPYING' for more information
14 */
16 #ifdef HAVE_CONFIG_H
17 # include <config.h>
18 #endif
19 #include "macros.h"
20 #include "inkscape-private.h"
21 #include "desktop.h"
22 #include "desktop-handles.h"
23 #include "document.h"
24 #include "selection.h"
25 #include "xml/repr.h"
27 #include "sp-shape.h"
30 #define SP_SELECTION_UPDATE_PRIORITY (G_PRIORITY_HIGH_IDLE + 1)
32 namespace Inkscape {
34 Selection::Selection(SPDesktop *desktop) :
35 _objs(NULL),
36 _reprs(NULL),
37 _items(NULL),
38 _desktop(desktop),
39 _flags(0),
40 _idle(0)
41 {
42 clearOnceInaccessible(&_desktop);
43 }
45 Selection::~Selection() {
46 _clear();
47 _desktop = NULL;
48 if (_idle) {
49 g_source_remove(_idle);
50 _idle = 0;
51 }
52 }
54 void
55 Selection::_release(SPObject *obj, Selection *selection)
56 {
57 selection->remove(obj);
58 }
60 /* Handler for selected objects "modified" signal */
62 void
63 Selection::_schedule_modified(SPObject *obj, guint flags, Selection *selection)
64 {
65 if (!selection->_idle) {
66 /* Request handling to be run in _idle loop */
67 selection->_idle = g_idle_add_full(SP_SELECTION_UPDATE_PRIORITY, GSourceFunc(&Selection::_emit_modified), selection, NULL);
68 }
70 /* Collect all flags */
71 selection->_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() {
94 inkscape_selection_changed(this);
95 _changed_signal.emit(this);
96 }
98 void Selection::_invalidateCachedLists() {
99 g_slist_free(_items);
100 _items = NULL;
102 g_slist_free(_reprs);
103 _reprs = NULL;
104 }
106 void Selection::_clear() {
107 _invalidateCachedLists();
108 while (_objs) {
109 SPObject *obj=reinterpret_cast<SPObject *>(_objs->data);
110 sp_signal_disconnect_by_data(obj, this);
111 _objs = g_slist_remove(_objs, obj);
112 }
113 }
115 bool Selection::includes(SPObject *obj) const {
116 if (obj == NULL)
117 return FALSE;
119 g_return_val_if_fail(SP_IS_OBJECT(obj), FALSE);
121 return ( g_slist_find(_objs, obj) != NULL );
122 }
124 void Selection::add(SPObject *obj) {
125 g_return_if_fail(obj != NULL);
126 g_return_if_fail(SP_IS_OBJECT(obj));
128 if (includes(obj)) {
129 return;
130 }
132 _invalidateCachedLists();
133 _add(obj);
134 _emitChanged();
135 }
137 void Selection::_add(SPObject *obj) {
138 // unselect any of the item's ancestors and descendants which may be selected
139 // (to prevent double-selection)
140 _removeObjectDescendants(obj);
141 _removeObjectAncestors(obj);
143 _objs = g_slist_prepend(_objs, obj);
144 g_signal_connect(G_OBJECT(obj), "release",
145 G_CALLBACK(&Selection::_release), this);
146 g_signal_connect(G_OBJECT(obj), "modified",
147 G_CALLBACK(&Selection::_schedule_modified), this);
149 /*
150 if (!SP_IS_SHAPE(obj)) {
151 printf("This is not a shape\n");
152 }
153 */
154 }
156 void Selection::set(SPObject *object) {
157 _clear();
158 add(object);
159 }
161 void Selection::toggle(SPObject *obj) {
162 if (includes (obj)) {
163 remove (obj);
164 } else {
165 add(obj);
166 }
167 }
169 void Selection::remove(SPObject *obj) {
170 g_return_if_fail(obj != NULL);
171 g_return_if_fail(SP_IS_OBJECT(obj));
172 g_return_if_fail(includes(obj));
174 _invalidateCachedLists();
175 _remove(obj);
176 _emitChanged();
177 }
179 void Selection::_remove(SPObject *obj) {
180 sp_signal_disconnect_by_data(obj, this);
181 _objs = g_slist_remove(_objs, obj);
182 }
184 void Selection::setList(GSList const *list) {
185 _clear();
187 if ( list != NULL ) {
188 for ( GSList const *iter = list ; iter != NULL ; iter = iter->next ) {
189 _add(reinterpret_cast<SPObject *>(iter->data));
190 }
191 }
193 _emitChanged();
194 }
196 void Selection::addList(GSList const *list) {
198 if (list == NULL)
199 return;
201 _invalidateCachedLists();
203 for ( GSList const *iter = list ; iter != NULL ; iter = iter->next ) {
204 SPObject *obj = reinterpret_cast<SPObject *>(iter->data);
205 if (includes(obj)) {
206 continue;
207 }
208 _add (obj);
209 }
211 _emitChanged();
212 }
214 void Selection::setReprList(GSList const *list) {
215 _clear();
217 for ( GSList const *iter = list ; iter != NULL ; iter = iter->next ) {
218 SPObject *obj=_objectForXMLNode(reinterpret_cast<Inkscape::XML::Node *>(iter->data));
219 if (obj) {
220 _add(obj);
221 }
222 }
224 _emitChanged();
225 }
227 void Selection::clear() {
228 _clear();
229 _emitChanged();
230 }
232 GSList const *Selection::list() {
233 return _objs;
234 }
236 GSList const *Selection::itemList() {
237 if (_items) {
238 return _items;
239 }
241 for ( GSList const *iter=_objs ; iter != NULL ; iter = iter->next ) {
242 SPObject *obj=reinterpret_cast<SPObject *>(iter->data);
243 if (SP_IS_ITEM(obj)) {
244 _items = g_slist_prepend(_items, SP_ITEM(obj));
245 }
246 }
247 _items = g_slist_reverse(_items);
249 return _items;
250 }
252 GSList const *Selection::reprList() {
253 if (_reprs) { return _reprs; }
255 for ( GSList const *iter=itemList() ; iter != NULL ; iter = iter->next ) {
256 SPObject *obj=reinterpret_cast<SPObject *>(iter->data);
257 _reprs = g_slist_prepend(_reprs, SP_OBJECT_REPR(obj));
258 }
259 _reprs = g_slist_reverse(_reprs);
261 return _reprs;
262 }
264 SPObject *Selection::single() {
265 if ( _objs != NULL && _objs->next == NULL ) {
266 return reinterpret_cast<SPObject *>(_objs->data);
267 } else {
268 return NULL;
269 }
270 }
272 SPItem *Selection::singleItem() {
273 GSList const *items=itemList();
274 if ( items != NULL && items->next == NULL ) {
275 return reinterpret_cast<SPItem *>(items->data);
276 } else {
277 return NULL;
278 }
279 }
281 Inkscape::XML::Node *Selection::singleRepr() {
282 SPObject *obj=single();
283 return obj ? SP_OBJECT_REPR(obj) : NULL;
284 }
286 NRRect *Selection::bounds(NRRect *bbox) const
287 {
288 g_return_val_if_fail (bbox != NULL, NULL);
289 NR::Rect const b = bounds();
290 bbox->x0 = b.min()[NR::X];
291 bbox->y0 = b.min()[NR::Y];
292 bbox->x1 = b.max()[NR::X];
293 bbox->y1 = b.max()[NR::Y];
294 return bbox;
295 }
297 NR::Rect Selection::bounds() const
298 {
299 GSList const *items = const_cast<Selection *>(this)->itemList();
300 if (!items) {
301 return NR::Rect(NR::Point(0, 0), NR::Point(0, 0));
302 }
304 GSList const *i = items;
305 NR::Rect bbox = sp_item_bbox_desktop(SP_ITEM(i->data));
307 while (i != NULL) {
308 bbox = NR::Rect::union_bounds(bbox, sp_item_bbox_desktop(SP_ITEM(i->data)));
309 i = i->next;
310 }
312 return bbox;
313 }
315 NRRect *Selection::boundsInDocument(NRRect *bbox) const {
316 g_return_val_if_fail (bbox != NULL, NULL);
318 GSList const *items=const_cast<Selection *>(this)->itemList();
319 if (!items) {
320 bbox->x0 = bbox->y0 = bbox->x1 = bbox->y1 = 0.0;
321 return bbox;
322 }
324 bbox->x0 = bbox->y0 = 1e18;
325 bbox->x1 = bbox->y1 = -1e18;
327 for ( GSList const *iter=items ; iter != NULL ; iter = iter->next ) {
328 SPItem *item=SP_ITEM(iter->data);
329 NR::Matrix const i2doc(sp_item_i2doc_affine(item));
330 sp_item_invoke_bbox(item, bbox, i2doc, FALSE);
331 }
333 return bbox;
334 }
336 NR::Rect Selection::boundsInDocument() const {
337 NRRect r;
338 return NR::Rect(*boundsInDocument(&r));
339 }
341 /**
342 * Compute the list of points in the selection that are to be considered for snapping.
343 */
344 std::vector<NR::Point> Selection::getSnapPoints() const {
345 GSList const *items = const_cast<Selection *>(this)->itemList();
346 std::vector<NR::Point> p;
347 for (GSList const *iter = items; iter != NULL; iter = iter->next) {
348 sp_item_snappoints(SP_ITEM(iter->data), SnapPointsIter(p));
349 }
351 return p;
352 }
354 std::vector<NR::Point> Selection::getSnapPointsConvexHull() const {
355 GSList const *items = const_cast<Selection *>(this)->itemList();
356 std::vector<NR::Point> p;
357 for (GSList const *iter = items; iter != NULL; iter = iter->next) {
358 sp_item_snappoints(SP_ITEM(iter->data), SnapPointsIter(p));
359 }
361 std::vector<NR::Point>::iterator i;
362 NR::ConvexHull cvh(*(p.begin()));
363 for (i = p.begin(); i != p.end(); i++) {
364 // these are the points we get back
365 cvh.add(*i);
366 }
368 NR::Rect rHull = cvh.bounds();
369 std::vector<NR::Point> pHull(4);
370 pHull[0] = rHull.corner(0);
371 pHull[1] = rHull.corner(1);
372 pHull[2] = rHull.corner(2);
373 pHull[3] = rHull.corner(3);
375 return pHull;
376 }
378 std::vector<NR::Point> Selection::getBBoxPoints() const {
379 GSList const *items = const_cast<Selection *>(this)->itemList();
380 std::vector<NR::Point> p;
381 for (GSList const *iter = items; iter != NULL; iter = iter->next) {
382 NR::Rect b = sp_item_bbox_desktop(SP_ITEM(iter->data));
383 p.push_back(b.min());
384 p.push_back(b.max());
385 }
387 return p;
388 }
390 void Selection::_removeObjectDescendants(SPObject *obj) {
391 GSList *iter, *next;
392 for ( iter = _objs ; iter ; iter = next ) {
393 next = iter->next;
394 SPObject *sel_obj=reinterpret_cast<SPObject *>(iter->data);
395 SPObject *parent=SP_OBJECT_PARENT(sel_obj);
396 while (parent) {
397 if ( parent == obj ) {
398 _remove(sel_obj);
399 break;
400 }
401 parent = SP_OBJECT_PARENT(parent);
402 }
403 }
404 }
406 void Selection::_removeObjectAncestors(SPObject *obj) {
407 SPObject *parent=SP_OBJECT_PARENT(obj);
408 while (parent) {
409 if (includes(parent)) {
410 _remove(parent);
411 }
412 parent = SP_OBJECT_PARENT(parent);
413 }
414 }
416 SPObject *Selection::_objectForXMLNode(Inkscape::XML::Node *repr) const {
417 g_return_val_if_fail(repr != NULL, NULL);
418 gchar const *id = repr->attribute("id");
419 g_return_val_if_fail(id != NULL, NULL);
420 SPObject *object=SP_DT_DOCUMENT(_desktop)->getObjectById(id);
421 g_return_val_if_fail(object != NULL, NULL);
422 return object;
423 }
425 guint Selection::numberOfLayers() {
426 GSList const *items = const_cast<Selection *>(this)->itemList();
427 GSList *layers = NULL;
428 for (GSList const *iter = items; iter != NULL; iter = iter->next) {
429 SPObject *layer = desktop()->layerForObject(SP_OBJECT(iter->data));
430 if (g_slist_find (layers, layer) == NULL) {
431 layers = g_slist_prepend (layers, layer);
432 }
433 }
434 guint ret = g_slist_length (layers);
435 g_slist_free (layers);
436 return ret;
437 }
439 }
441 /*
442 Local Variables:
443 mode:c++
444 c-file-style:"stroustrup"
445 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
446 indent-tabs-mode:nil
447 fill-column:99
448 End:
449 */
450 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :