1 /**
2 * \file object-snapper.cpp
3 * \brief Snapping things to objects.
4 *
5 * Authors:
6 * Carl Hetherington <inkscape@carlh.net>
7 * Diederik van Lierop <mail@diedenrezi.nl>
8 *
9 * Copyright (C) 2005 - 2007 Authors
10 *
11 * Released under GNU GPL, read the file 'COPYING' for more information
12 */
14 #include "libnr/n-art-bpath.h"
15 #include "libnr/nr-path.h"
16 #include "libnr/nr-rect-ops.h"
17 #include "libnr/nr-point-fns.h"
18 #include "live_effects/n-art-bpath-2geom.h"
19 #include "2geom/path-intersection.h"
20 #include "document.h"
21 #include "sp-namedview.h"
22 #include "sp-image.h"
23 #include "sp-item-group.h"
24 #include "sp-item.h"
25 #include "sp-use.h"
26 #include "display/curve.h"
27 #include "desktop.h"
28 #include "inkscape.h"
29 #include "prefs-utils.h"
30 #include "sp-text.h"
31 #include "sp-flowtext.h"
32 #include "text-editing.h"
34 Inkscape::ObjectSnapper::ObjectSnapper(SPNamedView const *nv, NR::Coord const d)
35 : Snapper(nv, d), _snap_to_itemnode(true), _snap_to_itempath(true),
36 _snap_to_bboxnode(true), _snap_to_bboxpath(true), _strict_snapping(true),
37 _include_item_center(false)
38 {
39 _candidates = new std::vector<SPItem*>;
40 _points_to_snap_to = new std::vector<NR::Point>;
41 _bpaths_to_snap_to = new std::vector<NArtBpath*>;
42 _paths_to_snap_to = new std::vector<Path*>;
43 }
45 Inkscape::ObjectSnapper::~ObjectSnapper()
46 {
47 _candidates->clear(); //Don't delete the candidates themselves, as these are not ours!
48 delete _candidates;
50 _points_to_snap_to->clear();
51 delete _points_to_snap_to;
53 _clear_paths();
54 delete _paths_to_snap_to;
55 delete _bpaths_to_snap_to;
56 }
58 /**
59 * Find all items within snapping range.
60 * \param r Pointer to the current document
61 * \param it List of items to ignore
62 * \param first_point If true then this point is the first one from a whole bunch of points
63 * \param points_to_snap The whole bunch of points, all from the same selection and having the same transformation
64 * \param DimensionToSnap Snap in X, Y, or both directions.
65 */
67 void Inkscape::ObjectSnapper::_findCandidates(SPObject* r,
68 std::list<SPItem const *> const &it,
69 bool const &first_point,
70 std::vector<NR::Point> &points_to_snap,
71 DimensionToSnap const snap_dim) const
72 {
73 bool const c1 = (snap_dim == TRANSL_SNAP_XY) && ThisSnapperMightSnap();
74 bool const c2 = (snap_dim != TRANSL_SNAP_XY) && GuidesMightSnap();
75 bool const c3 = points_to_snap.size() == 0;
77 if (!(c1 || c2) || c3) {
78 return;
79 }
81 SPDesktop const *desktop = SP_ACTIVE_DESKTOP;
83 if (first_point) {
84 _candidates->clear();
85 }
87 NR::Maybe<NR::Rect> bbox = NR::Rect(); // a default NR::Rect is infinitely large
88 NR::Coord t = getSnapperTolerance();
90 // When dragging a guide...
91 NR::Point p_guide = points_to_snap[0];
92 if (!getSnapperAlwaysSnap()) {
93 bbox = NR::Rect(p_guide, p_guide); // bbox is now just a single point: p_guide
94 bbox->growBy(t); // bbox width and height now measure 2x snapper tolerance
95 // for angled guidelines the bbox is now larger than really needed
96 // (up to sqrt(2) for 45 deg. guidelines) but we'll leave it like that
97 } // else: use an infinitely large bbox to find candidates
99 for (SPObject* o = sp_object_first_child(r); o != NULL; o = SP_OBJECT_NEXT(o)) {
100 if (SP_IS_ITEM(o) && !SP_ITEM(o)->isLocked() && !desktop->itemIsHidden(SP_ITEM(o))) {
102 /* See if this item is on the ignore list */
103 std::list<SPItem const *>::const_iterator i = it.begin();
104 while (i != it.end() && *i != o) {
105 i++;
106 }
108 if (i == it.end()) {
109 /* See if the item is within range */
110 if (SP_IS_GROUP(o)) {
111 _findCandidates(o, it, false, points_to_snap, snap_dim);
112 } else {
113 // Now let's see if any of the snapping points is within snapping range of this object
114 if (snap_dim == TRANSL_SNAP_XY) {
115 bbox = sp_item_bbox_desktop(SP_ITEM(o));
116 } // else: we're snapping a guide to an object and we will use the bbox as defined above
118 if (bbox) {
119 for (std::vector<NR::Point>::const_iterator i = points_to_snap.begin(); i != points_to_snap.end(); i++) {
120 NR::Point b_min = bbox->min();
121 NR::Point b_max = bbox->max();
122 bool withinX = ((*i)[NR::X] >= b_min[NR::X] - t) && ((*i)[NR::X] <= b_max[NR::X] + t);
123 bool withinY = ((*i)[NR::Y] >= b_min[NR::Y] - t) && ((*i)[NR::Y] <= b_max[NR::Y] + t);
124 if (withinX && withinY) {
125 //We've found a point that is within snapping range
126 //of this object, so record it as a candidate
127 _candidates->push_back(SP_ITEM(o));
128 break;
129 }
130 }
131 }
132 }
133 }
134 }
135 }
136 }
139 void Inkscape::ObjectSnapper::_collectNodes(Inkscape::Snapper::PointType const &t,
140 bool const &first_point) const
141 {
142 // Now, let's first collect all points to snap to. If we have a whole bunch of points to snap,
143 // e.g. when translating an item using the selector tool, then we will only do this for the
144 // first point and store the collection for later use. This significantly improves the performance
145 if (first_point) {
146 _points_to_snap_to->clear();
148 // Determine the type of bounding box we should snap to
149 SPItem::BBoxType bbox_type = SPItem::GEOMETRIC_BBOX;
151 bool p_is_a_node = t & Inkscape::Snapper::SNAPPOINT_NODE;
152 bool p_is_a_bbox = t & Inkscape::Snapper::SNAPPOINT_BBOX;
153 bool p_is_a_guide = t & Inkscape::Snapper::SNAPPOINT_GUIDE;
155 // A point considered for snapping should be either a node, a bbox corner or a guide. Pick only ONE!
156 g_assert(!(p_is_a_node && p_is_a_bbox || p_is_a_bbox && p_is_a_guide || p_is_a_node && p_is_a_guide));
158 if (_snap_to_bboxnode) {
159 gchar const *prefs_bbox = prefs_get_string_attribute("tools", "bounding_box");
160 bbox_type = (prefs_bbox != NULL && strcmp(prefs_bbox, "geometric")==0)? SPItem::GEOMETRIC_BBOX : SPItem::APPROXIMATE_BBOX;
161 }
163 for (std::vector<SPItem*>::const_iterator i = _candidates->begin(); i != _candidates->end(); i++) {
164 //NR::Matrix i2doc(NR::identity());
165 SPItem *root_item = *i;
166 if (SP_IS_USE(*i)) {
167 root_item = sp_use_root(SP_USE(*i));
168 }
169 g_return_if_fail(root_item);
171 //Collect all nodes so we can snap to them
172 if (_snap_to_itemnode) {
173 if (!(_strict_snapping && !p_is_a_node) || p_is_a_guide) {
174 sp_item_snappoints(root_item, _include_item_center, SnapPointsIter(*_points_to_snap_to));
175 }
176 }
178 //Collect the bounding box's corners so we can snap to them
179 if (_snap_to_bboxnode) {
180 if (!(_strict_snapping && !p_is_a_bbox) || p_is_a_guide) {
181 NR::Maybe<NR::Rect> b = sp_item_bbox_desktop(root_item, bbox_type);
182 if (b) {
183 for ( unsigned k = 0 ; k < 4 ; k++ ) {
184 _points_to_snap_to->push_back(b->corner(k));
185 }
186 }
187 }
188 }
189 }
190 }
191 }
193 void Inkscape::ObjectSnapper::_snapNodes(SnappedConstraints &sc,
194 Inkscape::Snapper::PointType const &t,
195 NR::Point const &p,
196 bool const &first_point) const
197 {
198 // Iterate through all nodes, find out which one is the closest to p, and snap to it!
200 _collectNodes(t, first_point);
202 SnappedPoint s;
203 bool success = false;
205 for (std::vector<NR::Point>::const_iterator k = _points_to_snap_to->begin(); k != _points_to_snap_to->end(); k++) {
206 NR::Coord dist = NR::L2(*k - p);
207 if (dist < getSnapperTolerance() && dist < s.getDistance()) {
208 s = SnappedPoint(*k, dist, getSnapperTolerance(), getSnapperAlwaysSnap());
209 success = true;
210 }
211 }
213 if (success) {
214 sc.points.push_back(s);
215 }
216 }
218 void Inkscape::ObjectSnapper::_snapTranslatingGuideToNodes(SnappedConstraints &sc,
219 Inkscape::Snapper::PointType const &t,
220 NR::Point const &p,
221 NR::Point const &guide_normal) const
222 {
223 // Iterate through all nodes, find out which one is the closest to this guide, and snap to it!
224 _collectNodes(t, true);
226 SnappedPoint s;
227 bool success = false;
229 NR::Coord tol = getSnapperTolerance();
231 for (std::vector<NR::Point>::const_iterator k = _points_to_snap_to->begin(); k != _points_to_snap_to->end(); k++) {
232 // Project each node (*k) on the guide line (running through point p)
233 NR::Point p_proj = project_on_linesegment(*k, p, p + NR::rot90(guide_normal));
234 NR::Coord dist = NR::L2(*k - p_proj); // distance from node to the guide
235 NR::Coord dist2 = NR::L2(p - p_proj); // distance from projection of node on the guide, to the mouse location
236 if ((dist < tol && dist2 < tol || getSnapperAlwaysSnap()) && dist < s.getDistance()) {
237 s = SnappedPoint(*k, dist, tol, getSnapperAlwaysSnap());
238 success = true;
239 }
240 }
242 if (success) {
243 sc.points.push_back(s);
244 }
245 }
247 void Inkscape::ObjectSnapper::_collectPaths(Inkscape::Snapper::PointType const &t,
248 bool const &first_point) const
249 {
250 // Now, let's first collect all paths to snap to. If we have a whole bunch of points to snap,
251 // e.g. when translating an item using the selector tool, then we will only do this for the
252 // first point and store the collection for later use. This significantly improves the performance
253 if (first_point) {
254 _clear_paths();
256 // Determine the type of bounding box we should snap to
257 SPItem::BBoxType bbox_type = SPItem::GEOMETRIC_BBOX;
259 bool p_is_a_node = t & Inkscape::Snapper::SNAPPOINT_NODE;
261 if (_snap_to_bboxpath) {
262 gchar const *prefs_bbox = prefs_get_string_attribute("tools", "bounding_box");
263 bbox_type = (prefs_bbox != NULL && strcmp(prefs_bbox, "geometric")==0)? SPItem::GEOMETRIC_BBOX : SPItem::APPROXIMATE_BBOX;
264 }
266 for (std::vector<SPItem*>::const_iterator i = _candidates->begin(); i != _candidates->end(); i++) {
268 /* Transform the requested snap point to this item's coordinates */
269 NR::Matrix i2doc(NR::identity());
270 SPItem *root_item = NULL;
271 /* We might have a clone at hand, so make sure we get the root item */
272 if (SP_IS_USE(*i)) {
273 i2doc = sp_use_get_root_transform(SP_USE(*i));
274 root_item = sp_use_root(SP_USE(*i));
275 g_return_if_fail(root_item);
276 } else {
277 i2doc = sp_item_i2doc_affine(*i);
278 root_item = *i;
279 }
281 //Build a list of all paths considered for snapping to
283 //Add the item's path to snap to
284 if (_snap_to_itempath) {
285 if (!(_strict_snapping && !p_is_a_node)) {
286 // Snapping to the path of characters is very cool, but for a large
287 // chunk of text this will take ages! So limit snapping to text paths
288 // containing max. 240 characters. Snapping the bbox will not be affected
289 bool very_lenghty_prose = false;
290 if (SP_IS_TEXT(root_item) || SP_IS_FLOWTEXT(root_item)) {
291 very_lenghty_prose = sp_text_get_length(SP_TEXT(root_item)) > 240;
292 }
293 // On my AMD 3000+, the snapping lag becomes annoying at approx. 240 chars
294 // which corresponds to a lag of 500 msec. This is for snapping a rect
295 // to a single line of text.
297 // Snapping for example to a traced bitmap is also very stressing for
298 // the CPU, so we'll only snap to paths having no more than 500 nodes
299 // This also leads to a lag of approx. 500 msec (in my lousy test set-up).
300 bool very_complex_path = false;
301 if (SP_IS_PATH(root_item)) {
302 very_complex_path = sp_nodes_in_path(SP_PATH(root_item)) > 500;
303 }
305 if (!very_lenghty_prose && !very_complex_path) {
306 SPCurve *curve = curve_for_item(root_item);
307 if (curve) {
308 NArtBpath *bpath = bpath_for_curve(root_item, curve, true, true);
309 _bpaths_to_snap_to->push_back(bpath);
310 // Because in bpath_for_curve we set doTransformation to true, we
311 // will get a dupe of the path, which must be freed at some point
312 sp_curve_unref(curve);
313 }
314 }
315 }
316 }
318 //Add the item's bounding box to snap to
319 if (_snap_to_bboxpath) {
320 if (!(_strict_snapping && p_is_a_node)) {
321 NRRect rect;
322 sp_item_invoke_bbox(root_item, &rect, i2doc, TRUE, bbox_type);
323 NArtBpath *bpath = nr_path_from_rect(rect);
324 _bpaths_to_snap_to->push_back(bpath);
325 }
326 }
327 }
328 }
329 }
331 void Inkscape::ObjectSnapper::_snapPaths(SnappedConstraints &sc,
332 Inkscape::Snapper::PointType const &t,
333 NR::Point const &p,
334 bool const &first_point) const
335 {
336 _collectPaths(t, first_point);
338 // Now we can finally do the real snapping, using the paths collected above
339 SnappedPoint s;
340 bool success = false;
342 /* FIXME: this seems like a hack. Perhaps Snappers should be
343 ** in SPDesktop rather than SPNamedView?
344 */
345 SPDesktop const *desktop = SP_ACTIVE_DESKTOP;
346 NR::Point const p_doc = desktop->dt2doc(p);
348 // Convert all bpaths to Paths, because here we really must have Paths
349 // (whereas in _snapPathsConstrained we will use the original bpaths)
350 if (first_point) {
351 for (std::vector<NArtBpath*>::const_iterator k = _bpaths_to_snap_to->begin(); k != _bpaths_to_snap_to->end(); k++) {
352 Path *path = bpath_to_Path(*k);
353 if (path) {
354 path->ConvertWithBackData(0.01); //This is extremely time consuming!
355 _paths_to_snap_to->push_back(path);
356 }
357 }
358 }
360 for (std::vector<Path*>::const_iterator k = _paths_to_snap_to->begin(); k != _paths_to_snap_to->end(); k++) {
361 if (*k) {
362 /* Look for the nearest position on this SPItem to our snap point */
363 NR::Maybe<Path::cut_position> const o = get_nearest_position_on_Path(*k, p_doc);
364 if (o && o->t >= 0 && o->t <= 1) {
366 /* Convert the nearest point back to desktop coordinates */
367 NR::Point const o_it = get_point_on_Path(*k, o->piece, o->t);
368 NR::Point const o_dt = desktop->doc2dt(o_it);
369 NR::Coord const dist = NR::L2(o_dt - p);
371 if (dist < getSnapperTolerance()) {
372 // if we snap to a straight line segment (within a path), then return this line segment
373 if ((*k)->IsLineSegment(o->piece)) {
374 NR::Point start_point;
375 NR::Point end_point;
376 (*k)->PointAt(o->piece, 0, start_point);
377 (*k)->PointAt(o->piece, 1, end_point);
378 start_point = desktop->doc2dt(start_point);
379 end_point = desktop->doc2dt(end_point);
380 sc.lines.push_back(Inkscape::SnappedLineSegment(o_dt, dist, getSnapperTolerance(), getSnapperAlwaysSnap(), start_point, end_point));
381 } else {
382 // for segments other than straight lines of a path, we'll return just the closest snapped point
383 if (dist < s.getDistance()) {
384 s = SnappedPoint(o_dt, dist, getSnapperTolerance(), getSnapperAlwaysSnap());
385 success = true;
386 }
387 }
388 }
389 }
390 }
391 }
393 if (success) {
394 sc.points.push_back(s);
395 }
396 }
398 void Inkscape::ObjectSnapper::_snapPathsConstrained(SnappedConstraints &sc,
399 Inkscape::Snapper::PointType const &t,
400 NR::Point const &p,
401 bool const &first_point,
402 ConstraintLine const &c) const
403 {
404 _collectPaths(t, first_point);
406 // Now we can finally do the real snapping, using the paths collected above
408 /* FIXME: this seems like a hack. Perhaps Snappers should be
409 ** in SPDesktop rather than SPNamedView?
410 */
411 SPDesktop const *desktop = SP_ACTIVE_DESKTOP;
412 NR::Point const p_doc = desktop->dt2doc(p);
414 NR::Point direction_vector = c.getDirection();
415 if (!is_zero(direction_vector)) {
416 direction_vector = NR::unit_vector(direction_vector);
417 }
419 NR::Point const p1_on_cl = c.hasPoint() ? c.getPoint() : p;
420 NR::Point const p2_on_cl = p1_on_cl + direction_vector;
422 // The intersection point of the constraint line with any path,
423 // must lie within two points on the constraintline: p_min_on_cl and p_max_on_cl
424 // The distance between those points is twice the snapping tolerance
425 NR::Point const p_proj_on_cl = project_on_linesegment(p, p1_on_cl, p2_on_cl);
426 NR::Point const p_min_on_cl = desktop->dt2doc(p_proj_on_cl - getSnapperTolerance() * direction_vector);
427 NR::Point const p_max_on_cl = desktop->dt2doc(p_proj_on_cl + getSnapperTolerance() * direction_vector);
429 Geom::Path cl;
430 cl.start(p_min_on_cl.to_2geom());
431 cl.appendNew<Geom::LineSegment>(p_max_on_cl.to_2geom());
433 for (std::vector<NArtBpath*>::const_iterator k = _bpaths_to_snap_to->begin(); k != _bpaths_to_snap_to->end(); k++) {
434 if (*k) {
435 // convert a Path object (see src/livarot/Path.h) to a 2geom's path object (see 2geom/path.h)
436 // TODO: (Diederik) Only do this once for the first point, needs some storage of pointers in a member variable
437 std::vector<Geom::Path> path_2geom = BPath_to_2GeomPath(*k);
439 for (std::vector<Geom::Path>::const_iterator l = path_2geom.begin(); l != path_2geom.end(); l++) {
440 Geom::SimpleCrosser sxr;
441 Geom::Crossings crossings = sxr.crossings(*l, cl);
442 for (std::vector<Geom::Crossing>::const_iterator m = crossings.begin(); m != crossings.end(); m++) {
443 // Reconstruct the point of intersection
444 NR::Point p_inters = p_min_on_cl + ((*m).tb) * (p_max_on_cl - p_min_on_cl);
445 // When it's within snapping range, then return it
446 // (within snapping range == between p_min_on_cl and p_max_on_cl == 0 < tb < 1)
447 if ((*m).tb >= 0 && (*m).tb <= 1 ) {
448 NR::Coord dist = NR::L2(desktop->dt2doc(p_proj_on_cl) - p_inters);
449 SnappedPoint s(desktop->doc2dt(p_inters), dist, getSnapperTolerance(), getSnapperAlwaysSnap());
450 sc.points.push_back(s);
451 }
452 }
453 }
454 }
455 }
456 }
459 void Inkscape::ObjectSnapper::_doFreeSnap(SnappedConstraints &sc,
460 Inkscape::Snapper::PointType const &t,
461 NR::Point const &p,
462 bool const &first_point,
463 std::vector<NR::Point> &points_to_snap,
464 std::list<SPItem const *> const &it) const
465 {
466 if ( NULL == _named_view ) {
467 return;
468 }
470 /* Get a list of all the SPItems that we will try to snap to */
471 if (first_point) {
472 _findCandidates(sp_document_root(_named_view->document), it, first_point, points_to_snap, TRANSL_SNAP_XY);
473 }
475 if (_snap_to_itemnode || _snap_to_bboxnode) {
476 _snapNodes(sc, t, p, first_point);
477 }
478 if (_snap_to_itempath || _snap_to_bboxpath) {
479 _snapPaths(sc, t, p, first_point);
480 }
481 }
485 void Inkscape::ObjectSnapper::_doConstrainedSnap( SnappedConstraints &sc,
486 Inkscape::Snapper::PointType const &t,
487 NR::Point const &p,
488 bool const &first_point,
489 std::vector<NR::Point> &points_to_snap,
490 ConstraintLine const &c,
491 std::list<SPItem const *> const &it) const
492 {
493 if ( NULL == _named_view ) {
494 return;
495 }
497 /* Get a list of all the SPItems that we will try to snap to */
498 if (first_point) {
499 _findCandidates(sp_document_root(_named_view->document), it, first_point, points_to_snap, TRANSL_SNAP_XY);
500 }
502 // A constrained snap, is a snap in only one degree of freedom (specified by the constraint line).
503 // This is usefull for example when scaling an object while maintaining a fixed aspect ratio. It's
504 // nodes are only allowed to move in one direction (i.e. in one degree of freedom).
506 // When snapping to objects, we either snap to their nodes or their paths. It is however very
507 // unlikely that any node will be exactly at the constrained line, so for a constrained snap
508 // to objects we will only consider the object's paths. Beside, the nodes will be at these paths,
509 // so we will more or less snap to them anyhow.
511 if (_snap_to_itempath || _snap_to_bboxpath) {
512 _snapPathsConstrained(sc, t, p, first_point, c);
513 }
514 }
517 // This method is used to snap a guide to nodes, while dragging the guide around
518 void Inkscape::ObjectSnapper::guideSnap(SnappedConstraints &sc,
519 NR::Point const &p,
520 NR::Point const &guide_normal) const
521 {
522 if ( NULL == _named_view ) {
523 return;
524 }
526 /* Get a list of all the SPItems that we will try to snap to */
527 std::vector<SPItem*> cand;
528 std::list<SPItem const *> const it; //just an empty list
530 std::vector<NR::Point> points_to_snap;
531 points_to_snap.push_back(p);
533 DimensionToSnap snap_dim;
534 if (guide_normal == component_vectors[NR::Y]) {
535 snap_dim = GUIDE_TRANSL_SNAP_Y;
536 } else if (guide_normal == component_vectors[NR::X]) {
537 snap_dim = GUIDE_TRANSL_SNAP_X;
538 } else {
539 snap_dim = ANGLED_GUIDE_TRANSL_SNAP;
540 }
541 // We don't support ANGLED_GUIDE_ROT_SNAP yet.
543 // It would be cool to allow the user to rotate a guide by dragging it, instead of
544 // only translating it. (For example when CTRL is pressed). We will need an UI part
545 // for that first; and some important usability choices need to be made:
546 // E.g. which point should be used for pivoting? A previously snapped point,
547 // or a transformation center (which can be moved after clicking for the
548 // second time on an object; but should this point then be constrained to the
549 // line, or can it be located anywhere?)
551 _findCandidates(sp_document_root(_named_view->document), it, true, points_to_snap, snap_dim);
552 _snapTranslatingGuideToNodes(sc, Inkscape::Snapper::SNAPPOINT_GUIDE, p, guide_normal);
554 // _snapRotatingGuideToNodes has not been implemented yet.
555 }
557 /**
558 * \return true if this Snapper will snap at least one kind of point.
559 */
560 bool Inkscape::ObjectSnapper::ThisSnapperMightSnap() const
561 {
562 bool snap_to_something = _snap_to_itempath || _snap_to_itemnode || _snap_to_bboxpath || _snap_to_bboxnode;
563 return (_snap_enabled && _snap_from != 0 && snap_to_something);
564 }
566 bool Inkscape::ObjectSnapper::GuidesMightSnap() const
567 {
568 bool snap_to_something = _snap_to_itemnode || _snap_to_bboxnode;
569 return (_snap_enabled && (_snap_from & SNAPPOINT_GUIDE) && snap_to_something);
570 }
572 void Inkscape::ObjectSnapper::_clear_paths() const
573 {
574 for (std::vector<NArtBpath*>::const_iterator k = _bpaths_to_snap_to->begin(); k != _bpaths_to_snap_to->end(); k++) {
575 g_free(*k);
576 }
577 _bpaths_to_snap_to->clear();
579 for (std::vector<Path*>::const_iterator k = _paths_to_snap_to->begin(); k != _paths_to_snap_to->end(); k++) {
580 delete *k;
581 }
582 _paths_to_snap_to->clear();
583 }
585 /*
586 Local Variables:
587 mode:c++
588 c-file-style:"stroustrup"
589 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
590 indent-tabs-mode:nil
591 fill-column:99
592 End:
593 */
594 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :