1 /*
2 * Base class for shapes, including <path> element
3 *
4 * Author:
5 * Lauris Kaplinski <lauris@kaplinski.com>
6 *
7 * Copyright (C) 1999-2002 Lauris Kaplinski
8 * Copyright (C) 2000-2001 Ximian, Inc.
9 * Copyright (C) 2004 John Cliff
10 * Copyright (C) 2007-2008 Johan Engelen
11 *
12 * Released under GNU GPL, read the file 'COPYING' for more information
13 */
15 #ifdef HAVE_CONFIG_H
16 # include "config.h"
17 #endif
19 #include <libnr/nr-matrix-fns.h>
20 #include <libnr/nr-matrix-ops.h>
21 #include <libnr/nr-matrix-translate-ops.h>
22 #include <libnr/nr-scale-matrix-ops.h>
23 #include <2geom/rect.h>
24 #include <2geom/transforms.h>
25 #include <2geom/pathvector.h>
26 #include <2geom/path-intersection.h>
27 #include "helper/geom.h"
28 #include "helper/geom-nodetype.h"
30 #include <sigc++/functors/ptr_fun.h>
31 #include <sigc++/adaptors/bind.h>
33 #include "macros.h"
34 #include "display/nr-arena-shape.h"
35 #include "display/curve.h"
36 #include "print.h"
37 #include "document.h"
38 #include "style.h"
39 #include "marker.h"
40 #include "sp-path.h"
41 #include "preferences.h"
42 #include "attributes.h"
44 #include "live_effects/lpeobject.h"
45 #include "uri.h"
46 #include "extract-uri.h"
47 #include "uri-references.h"
48 #include "bad-uri-exception.h"
49 #include "xml/repr.h"
51 #include "util/mathfns.h" // for triangle_area()
53 #include "splivarot.h" // for bounding box calculation
55 #define noSHAPE_VERBOSE
57 /*static void sp_shape_class_init (SPShapeClass *klass);
58 static void sp_shape_init (SPShape *shape);
59 static void sp_shape_finalize (GObject *object);
61 static void sp_shape_build (SPObject * object, SPDocument * document, Inkscape::XML::Node * repr);
62 static void sp_shape_release (SPObject *object);
64 static void sp_shape_set(SPObject *object, unsigned key, gchar const *value);
65 static void sp_shape_update (SPObject *object, SPCtx *ctx, unsigned int flags);
66 static void sp_shape_modified (SPObject *object, unsigned int flags);
67 static Inkscape::XML::Node *sp_shape_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
69 static void sp_shape_bbox(SPItem const *item, NRRect *bbox, Geom::Matrix const &transform, unsigned const flags);*/
70 void sp_shape_print (SPItem * item, SPPrintContext * ctx);
71 /*static NRArenaItem *sp_shape_show (SPItem *item, NRArena *arena, unsigned int key, unsigned int flags);
72 static void sp_shape_hide (SPItem *item, unsigned int key);
73 static void sp_shape_snappoints (SPItem const *item, std::vector<Inkscape::SnapCandidatePoint> &p, Inkscape::SnapPreferences const *snapprefs);
75 static void sp_shape_update_marker_view (SPShape *shape, NRArenaItem *ai);
77 static SPLPEItemClass *parent_class;*/
79 SPLPEItemClass * SPShapeClass::parent_class=0;
81 /**
82 * Registers the SPShape class with Gdk and returns its type number.
83 */
84 GType
85 SPShape::getType (void)
86 {
87 static GType type = 0;
88 if (!type) {
89 GTypeInfo info = {
90 sizeof (SPShapeClass),
91 NULL, NULL,
92 (GClassInitFunc) SPShapeClass::sp_shape_class_init,
93 NULL, NULL,
94 sizeof (SPShape),
95 16,
96 (GInstanceInitFunc) sp_shape_init,
97 NULL, /* value_table */
98 };
99 type = g_type_register_static (SP_TYPE_LPE_ITEM, "SPShape", &info, (GTypeFlags)0);
100 }
101 return type;
102 }
104 /**
105 * Initializes a SPShapeClass object. Establishes the function pointers to the class'
106 * member routines in the class vtable, and sets pointers to parent classes.
107 */
108 void
109 SPShapeClass::sp_shape_class_init (SPShapeClass *klass)
110 {
111 GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
112 SPObjectClass *sp_object_class = SP_OBJECT_CLASS(klass);
113 SPItemClass * item_class = SP_ITEM_CLASS(klass);
114 SPLPEItemClass * lpe_item_class = SP_LPE_ITEM_CLASS(klass);
116 parent_class = (SPLPEItemClass *)g_type_class_peek_parent (klass);
118 gobject_class->finalize = SPShape::sp_shape_finalize;
120 sp_object_class->build = SPShape::sp_shape_build;
121 sp_object_class->release = SPShape::sp_shape_release;
122 sp_object_class->set = SPShape::sp_shape_set;
123 sp_object_class->update = SPShape::sp_shape_update;
124 sp_object_class->modified = SPShape::sp_shape_modified;
125 sp_object_class->write = SPShape::sp_shape_write;
127 item_class->bbox = SPShape::sp_shape_bbox;
128 item_class->print = sp_shape_print;
129 item_class->show = SPShape::sp_shape_show;
130 item_class->hide = SPShape::sp_shape_hide;
131 item_class->snappoints = SPShape::sp_shape_snappoints;
132 lpe_item_class->update_patheffect = NULL;
134 klass->set_shape = NULL;
135 }
137 /**
138 * Initializes an SPShape object.
139 */
140 void
141 SPShape::sp_shape_init (SPShape *shape)
142 {
143 for ( int i = 0 ; i < SP_MARKER_LOC_QTY ; i++ ) {
144 new (&shape->release_connect[i]) sigc::connection();
145 new (&shape->modified_connect[i]) sigc::connection();
146 shape->marker[i] = NULL;
147 }
148 shape->curve = NULL;
149 }
151 void
152 SPShape::sp_shape_finalize (GObject *object)
153 {
154 SPShape *shape=(SPShape *)object;
156 for ( int i = 0 ; i < SP_MARKER_LOC_QTY ; i++ ) {
157 shape->release_connect[i].disconnect();
158 shape->release_connect[i].~connection();
159 shape->modified_connect[i].disconnect();
160 shape->modified_connect[i].~connection();
161 }
163 if (((GObjectClass *) (SPShapeClass::parent_class))->finalize) {
164 (* ((GObjectClass *) (SPShapeClass::parent_class))->finalize)(object);
165 }
166 }
168 /**
169 * Virtual build callback for SPMarker.
170 *
171 * This is to be invoked immediately after creation of an SPShape.
172 *
173 * \see sp_object_build()
174 */
175 void
176 SPShape::sp_shape_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
177 {
178 if (((SPObjectClass *) (SPShapeClass::parent_class))->build) {
179 (*((SPObjectClass *) (SPShapeClass::parent_class))->build) (object, document, repr);
180 }
182 for (int i = 0 ; i < SP_MARKER_LOC_QTY ; i++) {
183 sp_shape_set_marker (object, i, object->style->marker[i].value);
184 }
185 }
187 /**
188 * Removes, releases and unrefs all children of object
189 *
190 * This is the inverse of sp_shape_build(). It must be invoked as soon
191 * as the shape is removed from the tree, even if it is still referenced
192 * by other objects. This routine also disconnects/unrefs markers and
193 * curves attached to it.
194 *
195 * \see sp_object_release()
196 */
197 void
198 SPShape::sp_shape_release (SPObject *object)
199 {
200 SPItem *item;
201 SPShape *shape;
202 SPItemView *v;
203 int i;
205 item = (SPItem *) object;
206 shape = (SPShape *) object;
208 for (i = 0; i < SP_MARKER_LOC_QTY; i++) {
209 if (shape->marker[i]) {
210 for (v = item->display; v != NULL; v = v->next) {
211 sp_marker_hide ((SPMarker *) shape->marker[i], NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i);
212 }
213 shape->release_connect[i].disconnect();
214 shape->modified_connect[i].disconnect();
215 shape->marker[i] = sp_object_hunref (shape->marker[i], object);
216 }
217 }
218 if (shape->curve) {
219 shape->curve = shape->curve->unref();
220 }
222 if (((SPObjectClass *) SPShapeClass::parent_class)->release) {
223 ((SPObjectClass *) SPShapeClass::parent_class)->release (object);
224 }
225 }
229 void
230 SPShape::sp_shape_set(SPObject *object, unsigned int key, gchar const *value)
231 {
232 if (((SPObjectClass *) SPShapeClass::parent_class)->set) {
233 ((SPObjectClass *) SPShapeClass::parent_class)->set(object, key, value);
234 }
235 }
237 Inkscape::XML::Node *
238 SPShape::sp_shape_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags)
239 {
240 if (((SPObjectClass *)(SPShapeClass::parent_class))->write) {
241 ((SPObjectClass *)(SPShapeClass::parent_class))->write(object, doc, repr, flags);
242 }
244 return repr;
245 }
247 /**
248 * Updates the shape when its attributes have changed. Also establishes
249 * marker objects to match the style settings.
250 */
251 void
252 SPShape::sp_shape_update (SPObject *object, SPCtx *ctx, unsigned int flags)
253 {
254 SPItem *item = (SPItem *) object;
255 SPShape *shape = (SPShape *) object;
257 if (((SPObjectClass *) (SPShapeClass::parent_class))->update) {
258 (* ((SPObjectClass *) (SPShapeClass::parent_class))->update) (object, ctx, flags);
259 }
261 /* This stanza checks that an object's marker style agrees with
262 * the marker objects it has allocated. sp_shape_set_marker ensures
263 * that the appropriate marker objects are present (or absent) to
264 * match the style.
265 */
266 for (int i = 0 ; i < SP_MARKER_LOC_QTY ; i++) {
267 sp_shape_set_marker (object, i, object->style->marker[i].value);
268 }
270 if (flags & (SP_OBJECT_STYLE_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
271 SPStyle *style;
272 style = SP_OBJECT_STYLE (object);
273 if (style->stroke_width.unit == SP_CSS_UNIT_PERCENT) {
274 SPItemCtx *ictx = (SPItemCtx *) ctx;
275 double const aw = 1.0 / NR::expansion(ictx->i2vp);
276 style->stroke_width.computed = style->stroke_width.value * aw;
277 for (SPItemView *v = ((SPItem *) (shape))->display; v != NULL; v = v->next) {
278 nr_arena_shape_set_style ((NRArenaShape *) v->arenaitem, style);
279 }
280 }
281 }
283 if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_PARENT_MODIFIED_FLAG)) {
284 /* This is suboptimal, because changing parent style schedules recalculation */
285 /* But on the other hand - how can we know that parent does not tie style and transform */
286 Geom::OptRect paintbox = SP_ITEM(object)->getBounds(Geom::identity(), SPItem::GEOMETRIC_BBOX);
287 for (SPItemView *v = SP_ITEM (shape)->display; v != NULL; v = v->next) {
288 NRArenaShape * const s = NR_ARENA_SHAPE(v->arenaitem);
289 if (flags & SP_OBJECT_MODIFIED_FLAG) {
290 nr_arena_shape_set_path(s, shape->curve, (flags & SP_OBJECT_USER_MODIFIED_FLAG_B));
291 }
292 if (paintbox) {
293 s->setPaintBox(*paintbox);
294 }
295 }
296 }
298 if (shape->hasMarkers ()) {
299 /* Dimension marker views */
300 for (SPItemView *v = item->display; v != NULL; v = v->next) {
301 if (!v->arenaitem->key) {
302 NR_ARENA_ITEM_SET_KEY (v->arenaitem, SPItem::display_key_new (SP_MARKER_LOC_QTY));
303 }
304 for (int i = 0 ; i < SP_MARKER_LOC_QTY ; i++) {
305 if (shape->marker[i]) {
306 sp_marker_show_dimension ((SPMarker *) shape->marker[i],
307 NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i,
308 shape->numberOfMarkers (i));
309 }
310 }
311 }
313 /* Update marker views */
314 for (SPItemView *v = item->display; v != NULL; v = v->next) {
315 sp_shape_update_marker_view (shape, v->arenaitem);
316 }
317 }
318 }
320 /**
321 * Calculate the transform required to get a marker's path object in the
322 * right place for particular path segment on a shape.
323 *
324 * \see sp_shape_marker_update_marker_view.
325 *
326 * From SVG spec:
327 * The axes of the temporary new user coordinate system are aligned according to the orient attribute on the 'marker'
328 * element and the slope of the curve at the given vertex. (Note: if there is a discontinuity at a vertex, the slope
329 * is the average of the slopes of the two segments of the curve that join at the given vertex. If a slope cannot be
330 * determined, the slope is assumed to be zero.)
331 *
332 * Reference: http://www.w3.org/TR/SVG11/painting.html#MarkerElement, the `orient' attribute.
333 * Reference for behaviour of zero-length segments:
334 * http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes
335 */
336 Geom::Matrix
337 sp_shape_marker_get_transform(Geom::Curve const & c1, Geom::Curve const & c2)
338 {
339 Geom::Point p = c1.pointAt(1);
340 Geom::Curve * c1_reverse = c1.reverse();
341 Geom::Point tang1 = - c1_reverse->unitTangentAt(0);
342 delete c1_reverse;
343 Geom::Point tang2 = c2.unitTangentAt(0);
345 double const angle1 = Geom::atan2(tang1);
346 double const angle2 = Geom::atan2(tang2);
348 double ret_angle;
349 ret_angle = .5 * (angle1 + angle2);
351 if ( fabs( angle2 - angle1 ) > M_PI ) {
352 /* ret_angle is in the middle of the larger of the two sectors between angle1 and
353 * angle2, so flip it by 180degrees to force it to the middle of the smaller sector.
354 *
355 * (Imagine a circle with rays drawn at angle1 and angle2 from the centre of the
356 * circle. Those two rays divide the circle into two sectors.)
357 */
358 ret_angle += M_PI;
359 }
361 return Geom::Rotate(ret_angle) * Geom::Translate(p);
362 }
363 Geom::Matrix
364 sp_shape_marker_get_transform_at_start(Geom::Curve const & c)
365 {
366 Geom::Point p = c.pointAt(0);
367 Geom::Matrix ret = Geom::Translate(p);
369 if ( !c.isDegenerate() ) {
370 Geom::Point tang = c.unitTangentAt(0);
371 double const angle = Geom::atan2(tang);
372 ret = Geom::Rotate(angle) * Geom::Translate(p);
373 } else {
374 /* FIXME: the svg spec says to search for a better alternative than zero angle directionality:
375 * http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes */
376 }
378 return ret;
379 }
380 Geom::Matrix
381 sp_shape_marker_get_transform_at_end(Geom::Curve const & c)
382 {
383 Geom::Point p = c.pointAt(1);
384 Geom::Matrix ret = Geom::Translate(p);
386 if ( !c.isDegenerate() ) {
387 Geom::Curve * c_reverse = c.reverse();
388 Geom::Point tang = - c_reverse->unitTangentAt(0);
389 delete c_reverse;
390 double const angle = Geom::atan2(tang);
391 ret = Geom::Rotate(angle) * Geom::Translate(p);
392 } else {
393 /* FIXME: the svg spec says to search for a better alternative than zero angle directionality:
394 * http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes */
395 }
397 return ret;
398 }
400 /**
401 * Updates the instances (views) of a given marker in a shape.
402 * Marker views have to be scaled already. The transformation
403 * is retrieved and then shown by calling sp_marker_show_instance.
404 *
405 * @todo figure out what to do when both 'marker' and for instance 'marker-end' are set.
406 */
407 void
408 SPShape::sp_shape_update_marker_view (SPShape *shape, NRArenaItem *ai)
409 {
410 SPStyle *style = ((SPObject *) shape)->style;
412 // position arguments to sp_marker_show_instance, basically counts the amount of markers.
413 int counter[4] = {0};
415 Geom::PathVector const & pathv = shape->curve->get_pathvector();
417 // the first vertex should get a start marker, the last an end marker, and all the others a mid marker
418 // see bug 456148
420 // START marker
421 {
422 Geom::Matrix const m (sp_shape_marker_get_transform_at_start(pathv.begin()->front()));
423 for (int i = 0; i < 2; i++) { // SP_MARKER_LOC and SP_MARKER_LOC_START
424 if ( shape->marker[i] ) {
425 sp_marker_show_instance ((SPMarker* ) shape->marker[i], ai,
426 NR_ARENA_ITEM_GET_KEY(ai) + i, counter[i], m,
427 style->stroke_width.computed);
428 counter[i]++;
429 }
430 }
431 }
433 // MID marker
434 if (shape->marker[SP_MARKER_LOC_MID] || shape->marker[SP_MARKER_LOC]) {
435 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
436 // START position
437 if ( path_it != pathv.begin()
438 && ! ((path_it == (pathv.end()-1)) && (path_it->size_default() == 0)) ) // if this is the last path and it is a moveto-only, don't draw mid marker there
439 {
440 Geom::Matrix const m (sp_shape_marker_get_transform_at_start(path_it->front()));
441 for (int i = 0; i < 3; i += 2) { // SP_MARKER_LOC and SP_MARKER_LOC_MID
442 if ( shape->marker[i] ) {
443 sp_marker_show_instance ((SPMarker* ) shape->marker[i], ai,
444 NR_ARENA_ITEM_GET_KEY(ai) + i, counter[i], m,
445 style->stroke_width.computed);
446 counter[i]++;
447 }
448 }
449 }
450 // MID position
451 if ( path_it->size_default() > 1) {
452 Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
453 Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
454 while (curve_it2 != path_it->end_default())
455 {
456 /* Put marker between curve_it1 and curve_it2.
457 * Loop to end_default (so including closing segment), because when a path is closed,
458 * there should be a midpoint marker between last segment and closing straight line segment
459 */
460 Geom::Matrix const m (sp_shape_marker_get_transform(*curve_it1, *curve_it2));
461 for (int i = 0; i < 3; i += 2) { // SP_MARKER_LOC and SP_MARKER_LOC_MID
462 if (shape->marker[i]) {
463 sp_marker_show_instance ((SPMarker* ) shape->marker[i], ai,
464 NR_ARENA_ITEM_GET_KEY(ai) + i, counter[i], m,
465 style->stroke_width.computed);
466 counter[i]++;
467 }
468 }
470 ++curve_it1;
471 ++curve_it2;
472 }
473 }
474 // END position
475 if ( path_it != (pathv.end()-1) && !path_it->empty()) {
476 Geom::Curve const &lastcurve = path_it->back_default();
477 Geom::Matrix const m = sp_shape_marker_get_transform_at_end(lastcurve);
478 for (int i = 0; i < 3; i += 2) { // SP_MARKER_LOC and SP_MARKER_LOC_MID
479 if (shape->marker[i]) {
480 sp_marker_show_instance ((SPMarker* ) shape->marker[i], ai,
481 NR_ARENA_ITEM_GET_KEY(ai) + i, counter[i], m,
482 style->stroke_width.computed);
483 counter[i]++;
484 }
485 }
486 }
487 }
488 }
490 // END marker
491 if ( shape->marker[SP_MARKER_LOC_END] || shape->marker[SP_MARKER_LOC] ) {
492 /* Get reference to last curve in the path.
493 * For moveto-only path, this returns the "closing line segment". */
494 Geom::Path const &path_last = pathv.back();
495 unsigned int index = path_last.size_default();
496 if (index > 0) {
497 index--;
498 }
499 Geom::Curve const &lastcurve = path_last[index];
500 Geom::Matrix const m = sp_shape_marker_get_transform_at_end(lastcurve);
502 for (int i = 0; i < 4; i += 3) { // SP_MARKER_LOC and SP_MARKER_LOC_END
503 if (shape->marker[i]) {
504 sp_marker_show_instance ((SPMarker* ) shape->marker[i], ai,
505 NR_ARENA_ITEM_GET_KEY(ai) + i, counter[i], m,
506 style->stroke_width.computed);
507 counter[i]++;
508 }
509 }
510 }
511 }
513 /**
514 * Sets modified flag for all sub-item views.
515 */
516 void
517 SPShape::sp_shape_modified (SPObject *object, unsigned int flags)
518 {
519 SPShape *shape = SP_SHAPE (object);
521 if (((SPObjectClass *) (SPShapeClass::parent_class))->modified) {
522 (* ((SPObjectClass *) (SPShapeClass::parent_class))->modified) (object, flags);
523 }
525 if (flags & SP_OBJECT_STYLE_MODIFIED_FLAG) {
526 for (SPItemView *v = SP_ITEM (shape)->display; v != NULL; v = v->next) {
527 nr_arena_shape_set_style (NR_ARENA_SHAPE (v->arenaitem), object->style);
528 }
529 }
530 }
532 /**
533 * Calculates the bounding box for item, storing it into bbox.
534 * This also includes the bounding boxes of any markers included in the shape.
535 */
536 void SPShape::sp_shape_bbox(SPItem const *item, NRRect *bbox, Geom::Matrix const &transform, unsigned const flags)
537 {
538 SPShape const *shape = SP_SHAPE (item);
539 if (shape->curve) {
540 Geom::OptRect geombbox = bounds_exact_transformed(shape->curve->get_pathvector(), transform);
541 if (geombbox) {
542 NRRect cbbox;
543 cbbox.x0 = (*geombbox)[0][0];
544 cbbox.y0 = (*geombbox)[1][0];
545 cbbox.x1 = (*geombbox)[0][1];
546 cbbox.y1 = (*geombbox)[1][1];
548 switch ((SPItem::BBoxType) flags) {
549 case SPItem::GEOMETRIC_BBOX: {
550 // do nothing
551 break;
552 }
553 case SPItem::RENDERING_BBOX: {
554 // convert the stroke to a path and calculate that path's geometric bbox
555 SPStyle* style=SP_OBJECT_STYLE (item);
556 if (!style->stroke.isNone()) {
557 Geom::PathVector *pathv = item_outline(item);
558 if (pathv) {
559 Geom::OptRect geomstrokebbox = bounds_exact_transformed(*pathv, transform);
560 if (geomstrokebbox) {
561 NRRect strokebbox;
562 strokebbox.x0 = (*geomstrokebbox)[0][0];
563 strokebbox.y0 = (*geomstrokebbox)[1][0];
564 strokebbox.x1 = (*geomstrokebbox)[0][1];
565 strokebbox.y1 = (*geomstrokebbox)[1][1];
566 nr_rect_d_union (&cbbox, &cbbox, &strokebbox);
567 }
568 delete pathv;
569 }
570 }
571 break;
572 }
573 default:
574 case SPItem::APPROXIMATE_BBOX: {
575 SPStyle* style=SP_OBJECT_STYLE (item);
576 if (!style->stroke.isNone()) {
577 double const scale = transform.descrim();
578 if ( fabs(style->stroke_width.computed * scale) > 0.01 ) { // sinon c'est 0=oon veut pas de bord
579 double const width = MAX(0.125, style->stroke_width.computed * scale);
580 if ( fabs(cbbox.x1-cbbox.x0) > -0.00001 && fabs(cbbox.y1-cbbox.y0) > -0.00001 ) {
581 cbbox.x0-=0.5*width;
582 cbbox.x1+=0.5*width;
583 cbbox.y0-=0.5*width;
584 cbbox.y1+=0.5*width;
585 }
586 }
587 }
589 // Union with bboxes of the markers, if any
590 if (shape->hasMarkers ()) {
591 /** \todo make code prettier! */
592 Geom::PathVector const & pathv = shape->curve->get_pathvector();
593 // START marker
594 for (unsigned i = 0; i < 2; i++) { // SP_MARKER_LOC and SP_MARKER_LOC_START
595 if ( shape->marker[i] ) {
596 SPMarker* marker = SP_MARKER (shape->marker[i]);
597 SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (marker));
599 if (marker_item) {
600 Geom::Matrix tr(sp_shape_marker_get_transform_at_start(pathv.begin()->front()));
601 if (!marker->orient_auto) {
602 Geom::Point transl = tr.translation();
603 tr = Geom::Rotate::from_degrees(marker->orient) * Geom::Translate(transl);
604 }
605 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
606 tr = Geom::Scale(style->stroke_width.computed) * tr;
607 }
609 // total marker transform
610 tr = marker_item->transform * marker->c2p * tr * transform;
612 // get bbox of the marker with that transform
613 NRRect marker_bbox;
614 marker_item->invoke_bbox ( &marker_bbox, from_2geom(tr), true);
615 // union it with the shape bbox
616 nr_rect_d_union (&cbbox, &cbbox, &marker_bbox);
617 }
618 }
619 }
620 // MID marker
621 for (unsigned i = 0; i < 3; i += 2) { // SP_MARKER_LOC and SP_MARKER_LOC_MID
622 SPMarker* marker = SP_MARKER (shape->marker[i]);
623 if ( !shape->marker[i] ) continue;
624 SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (marker));
625 if ( !marker_item ) continue;
627 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
628 // START position
629 if ( path_it != pathv.begin()
630 && ! ((path_it == (pathv.end()-1)) && (path_it->size_default() == 0)) ) // if this is the last path and it is a moveto-only, there is no mid marker there
631 {
632 Geom::Matrix tr(sp_shape_marker_get_transform_at_start(path_it->front()));
633 if (!marker->orient_auto) {
634 Geom::Point transl = tr.translation();
635 tr = Geom::Rotate::from_degrees(marker->orient) * Geom::Translate(transl);
636 }
637 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
638 tr = Geom::Scale(style->stroke_width.computed) * tr;
639 }
640 tr = marker_item->transform * marker->c2p * tr * transform;
641 NRRect marker_bbox;
642 marker_item->invoke_bbox ( &marker_bbox, from_2geom(tr), true);
643 nr_rect_d_union (&cbbox, &cbbox, &marker_bbox);
644 }
645 // MID position
646 if ( path_it->size_default() > 1) {
647 Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
648 Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
649 while (curve_it2 != path_it->end_default())
650 {
651 /* Put marker between curve_it1 and curve_it2.
652 * Loop to end_default (so including closing segment), because when a path is closed,
653 * there should be a midpoint marker between last segment and closing straight line segment */
655 SPMarker* marker = SP_MARKER (shape->marker[i]);
656 SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (marker));
658 if (marker_item) {
659 Geom::Matrix tr(sp_shape_marker_get_transform(*curve_it1, *curve_it2));
660 if (!marker->orient_auto) {
661 Geom::Point transl = tr.translation();
662 tr = Geom::Rotate::from_degrees(marker->orient) * Geom::Translate(transl);
663 }
664 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
665 tr = Geom::Scale(style->stroke_width.computed) * tr;
666 }
667 tr = marker_item->transform * marker->c2p * tr * transform;
668 NRRect marker_bbox;
669 marker_item->invoke_bbox ( &marker_bbox, from_2geom(tr), true);
670 nr_rect_d_union (&cbbox, &cbbox, &marker_bbox);
671 }
673 ++curve_it1;
674 ++curve_it2;
675 }
676 }
677 // END position
678 if ( path_it != (pathv.end()-1) && !path_it->empty()) {
679 Geom::Curve const &lastcurve = path_it->back_default();
680 Geom::Matrix tr = sp_shape_marker_get_transform_at_end(lastcurve);
681 if (!marker->orient_auto) {
682 Geom::Point transl = tr.translation();
683 tr = Geom::Rotate::from_degrees(marker->orient) * Geom::Translate(transl);
684 }
685 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
686 tr = Geom::Scale(style->stroke_width.computed) * tr;
687 }
688 tr = marker_item->transform * marker->c2p * tr * transform;
689 NRRect marker_bbox;
690 marker_item->invoke_bbox ( &marker_bbox, tr, true);
691 nr_rect_d_union (&cbbox, &cbbox, &marker_bbox);
692 }
693 }
694 }
695 // END marker
696 for (unsigned i = 0; i < 4; i += 3) { // SP_MARKER_LOC and SP_MARKER_LOC_END
697 if ( shape->marker[i] ) {
698 SPMarker* marker = SP_MARKER (shape->marker[i]);
699 SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (marker));
701 if (marker_item) {
702 /* Get reference to last curve in the path.
703 * For moveto-only path, this returns the "closing line segment". */
704 Geom::Path const &path_last = pathv.back();
705 unsigned int index = path_last.size_default();
706 if (index > 0) {
707 index--;
708 }
709 Geom::Curve const &lastcurve = path_last[index];
711 Geom::Matrix tr = sp_shape_marker_get_transform_at_end(lastcurve);
712 if (!marker->orient_auto) {
713 Geom::Point transl = tr.translation();
714 tr = Geom::Rotate::from_degrees(marker->orient) * Geom::Translate(transl);
715 }
716 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
717 tr = Geom::Scale(style->stroke_width.computed) * tr;
718 }
720 // total marker transform
721 tr = marker_item->transform * marker->c2p * tr * transform;
723 // get bbox of the marker with that transform
724 NRRect marker_bbox;
725 marker_item->invoke_bbox ( &marker_bbox, tr, true);
726 // union it with the shape bbox
727 nr_rect_d_union (&cbbox, &cbbox, &marker_bbox);
728 }
729 }
730 }
731 }
732 break;
733 } // end case approximate bbox type
734 } // end switch bboxtype
736 // copy our bbox to the variable we're given
737 *bbox = cbbox;
738 }
739 }
740 }
742 static void
743 sp_shape_print_invoke_marker_printing(SPObject* obj, Geom::Matrix tr, SPStyle* style, SPPrintContext *ctx) {
744 SPMarker *marker = SP_MARKER(obj);
745 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
746 tr = Geom::Scale(style->stroke_width.computed) * tr;
747 }
749 SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (marker));
750 tr = marker_item->transform * marker->c2p * tr;
752 Geom::Matrix old_tr = marker_item->transform;
753 marker_item->transform = tr;
754 marker_item->invoke_print (ctx);
755 marker_item->transform = old_tr;
756 }
757 /**
758 * Prepares shape for printing. Handles printing of comments for printing
759 * debugging, sizes the item to fit into the document width/height,
760 * applies print fill/stroke, sets transforms for markers, and adds
761 * comment labels.
762 */
763 void
764 sp_shape_print (SPItem *item, SPPrintContext *ctx)
765 {
766 NRRect pbox, dbox, bbox;
768 SPShape *shape = SP_SHAPE(item);
770 if (!shape->curve) return;
772 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
773 gint add_comments = prefs->getBool("/printing/debug/add-label-comments");
774 if (add_comments) {
775 gchar * comment = g_strdup_printf("begin '%s'",
776 SP_OBJECT(item)->defaultLabel());
777 sp_print_comment(ctx, comment);
778 g_free(comment);
779 }
781 /* fixme: Think (Lauris) */
782 item->invoke_bbox( &pbox, Geom::identity(), TRUE);
783 dbox.x0 = 0.0;
784 dbox.y0 = 0.0;
785 dbox.x1 = SP_OBJECT_DOCUMENT (item)->getWidth ();
786 dbox.y1 = SP_OBJECT_DOCUMENT (item)->getHeight ();
787 item->getBboxDesktop (&bbox);
788 Geom::Matrix const i2d(item->i2d_affine());
790 SPStyle* style = SP_OBJECT_STYLE (item);
792 if (!style->fill.isNone()) {
793 sp_print_fill (ctx, shape->curve->get_pathvector(), &i2d, style, &pbox, &dbox, &bbox);
794 }
796 if (!style->stroke.isNone()) {
797 sp_print_stroke (ctx, shape->curve->get_pathvector(), &i2d, style, &pbox, &dbox, &bbox);
798 }
800 /** \todo make code prettier */
801 Geom::PathVector const & pathv = shape->curve->get_pathvector();
802 // START marker
803 for (int i = 0; i < 2; i++) { // SP_MARKER_LOC and SP_MARKER_LOC_START
804 if ( shape->marker[i] ) {
805 Geom::Matrix tr(sp_shape_marker_get_transform_at_start(pathv.begin()->front()));
806 sp_shape_print_invoke_marker_printing(shape->marker[i], tr, style, ctx);
807 }
808 }
809 // MID marker
810 for (int i = 0; i < 3; i += 2) { // SP_MARKER_LOC and SP_MARKER_LOC_MID
811 if (shape->marker[i]) {
812 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
813 // START position
814 if ( path_it != pathv.begin()
815 && ! ((path_it == (pathv.end()-1)) && (path_it->size_default() == 0)) ) // if this is the last path and it is a moveto-only, there is no mid marker there
816 {
817 Geom::Matrix tr(sp_shape_marker_get_transform_at_start(path_it->front()));
818 sp_shape_print_invoke_marker_printing(shape->marker[i], tr, style, ctx);
819 }
820 // MID position
821 if ( path_it->size_default() > 1) {
822 Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
823 Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
824 while (curve_it2 != path_it->end_default())
825 {
826 /* Put marker between curve_it1 and curve_it2.
827 * Loop to end_default (so including closing segment), because when a path is closed,
828 * there should be a midpoint marker between last segment and closing straight line segment */
829 Geom::Matrix tr(sp_shape_marker_get_transform(*curve_it1, *curve_it2));
831 sp_shape_print_invoke_marker_printing(shape->marker[i], tr, style, ctx);
833 ++curve_it1;
834 ++curve_it2;
835 }
836 }
837 if ( path_it != (pathv.end()-1) && !path_it->empty()) {
838 Geom::Curve const &lastcurve = path_it->back_default();
839 Geom::Matrix tr = sp_shape_marker_get_transform_at_end(lastcurve);
840 sp_shape_print_invoke_marker_printing(shape->marker[i], tr, style, ctx);
841 }
842 }
843 }
844 }
845 // END marker
846 if ( shape->marker[SP_MARKER_LOC_END] || shape->marker[SP_MARKER_LOC]) {
847 /* Get reference to last curve in the path.
848 * For moveto-only path, this returns the "closing line segment". */
849 Geom::Path const &path_last = pathv.back();
850 unsigned int index = path_last.size_default();
851 if (index > 0) {
852 index--;
853 }
854 Geom::Curve const &lastcurve = path_last[index];
856 Geom::Matrix tr = sp_shape_marker_get_transform_at_end(lastcurve);
858 for (int i = 0; i < 4; i += 3) { // SP_MARKER_LOC and SP_MARKER_LOC_END
859 if (shape->marker[i]) {
860 sp_shape_print_invoke_marker_printing(shape->marker[i], tr, style, ctx);
861 }
862 }
863 }
865 if (add_comments) {
866 gchar * comment = g_strdup_printf("end '%s'",
867 SP_OBJECT(item)->defaultLabel());
868 sp_print_comment(ctx, comment);
869 g_free(comment);
870 }
871 }
873 /**
874 * Sets style, path, and paintbox. Updates marker views, including dimensions.
875 */
876 NRArenaItem *
877 SPShape::sp_shape_show (SPItem *item, NRArena *arena, unsigned int /*key*/, unsigned int /*flags*/)
878 {
879 SPObject *object = SP_OBJECT(item);
880 SPShape *shape = SP_SHAPE(item);
882 NRArenaItem *arenaitem = NRArenaShape::create(arena);
883 NRArenaShape * const s = NR_ARENA_SHAPE(arenaitem);
884 nr_arena_shape_set_style(s, object->style);
885 nr_arena_shape_set_path(s, shape->curve, false);
886 Geom::OptRect paintbox = item->getBounds(Geom::identity());
887 if (paintbox) {
888 s->setPaintBox(*paintbox);
889 }
891 /* This stanza checks that an object's marker style agrees with
892 * the marker objects it has allocated. sp_shape_set_marker ensures
893 * that the appropriate marker objects are present (or absent) to
894 * match the style.
895 */
896 for (int i = 0 ; i < SP_MARKER_LOC_QTY ; i++) {
897 sp_shape_set_marker (object, i, object->style->marker[i].value);
898 }
900 if (shape->hasMarkers ()) {
902 /* provide key and dimension the marker views */
903 if (!arenaitem->key) {
904 NR_ARENA_ITEM_SET_KEY (arenaitem, SPItem::display_key_new (SP_MARKER_LOC_QTY));
905 }
907 for (int i = 0; i < SP_MARKER_LOC_QTY; i++) {
908 if (shape->marker[i]) {
909 sp_marker_show_dimension ((SPMarker *) shape->marker[i],
910 NR_ARENA_ITEM_GET_KEY (arenaitem) + i,
911 shape->numberOfMarkers (i));
912 }
913 }
915 /* Update marker views */
916 sp_shape_update_marker_view (shape, arenaitem);
917 }
919 return arenaitem;
920 }
922 /**
923 * Hides/removes marker views from the shape.
924 */
925 void
926 SPShape::sp_shape_hide (SPItem *item, unsigned int key)
927 {
928 SPShape *shape;
929 SPItemView *v;
930 int i;
932 shape = (SPShape *) item;
934 for (i=0; i<SP_MARKER_LOC_QTY; i++) {
935 if (shape->marker[i]) {
936 for (v = item->display; v != NULL; v = v->next) {
937 if (key == v->key) {
938 sp_marker_hide ((SPMarker *) shape->marker[i],
939 NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i);
940 }
941 }
942 }
943 }
945 if (((SPItemClass *) SPShapeClass::parent_class)->hide) {
946 ((SPItemClass *) SPShapeClass::parent_class)->hide (item, key);
947 }
948 }
950 /**
951 * \param shape Shape.
952 * \return TRUE if the shape has any markers, or FALSE if not.
953 */
954 int
955 SPShape::hasMarkers () const
956 {
957 /* Note, we're ignoring 'marker' settings, which technically should apply for
958 all three settings. This should be fixed later such that if 'marker' is
959 specified, then all three should appear. */
961 return (
962 this->curve &&
963 (this->marker[SP_MARKER_LOC] ||
964 this->marker[SP_MARKER_LOC_START] ||
965 this->marker[SP_MARKER_LOC_MID] ||
966 this->marker[SP_MARKER_LOC_END])
967 );
968 }
971 /**
972 * \param shape Shape.
973 * \param type Marker type (e.g. SP_MARKER_LOC_START)
974 * \return Number of markers that the shape has of this type.
975 */
976 int
977 SPShape::numberOfMarkers (int type)
978 {
979 Geom::PathVector const & pathv = this->curve->get_pathvector();
980 if (pathv.size() == 0) {
981 return 0;
982 }
984 switch(type) {
985 case SP_MARKER_LOC:
986 {
987 if ( this->marker[SP_MARKER_LOC] ) {
988 guint n = 0;
989 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
990 n += path_it->size_default() + 1;
991 }
992 return n;
993 } else {
994 return 0;
995 }
996 }
997 case SP_MARKER_LOC_START:
998 // there is only a start marker on the first path of a pathvector
999 return this->marker[SP_MARKER_LOC_START] ? 1 : 0;
1001 case SP_MARKER_LOC_MID:
1002 {
1003 if ( this->marker[SP_MARKER_LOC_MID] ) {
1004 guint n = 0;
1005 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
1006 n += path_it->size_default() + 1;
1007 }
1008 return n - 2; // minus the start and end marker.
1009 } else {
1010 return 0;
1011 }
1012 }
1014 case SP_MARKER_LOC_END:
1015 {
1016 // there is only an end marker on the last path of a pathvector
1017 return this->marker[SP_MARKER_LOC_END] ? 1 : 0;
1018 }
1020 default:
1021 return 0;
1022 }
1023 }
1025 /**
1026 * Checks if the given marker is used in the shape, and if so, it
1027 * releases it by calling sp_marker_hide. Also detaches signals
1028 * and unrefs the marker from the shape.
1029 */
1030 static void
1031 sp_shape_marker_release (SPObject *marker, SPShape *shape)
1032 {
1033 SPItem *item;
1034 int i;
1036 item = (SPItem *) shape;
1038 for (i = 0; i < SP_MARKER_LOC_QTY; i++) {
1039 if (marker == shape->marker[i]) {
1040 SPItemView *v;
1041 /* Hide marker */
1042 for (v = item->display; v != NULL; v = v->next) {
1043 sp_marker_hide ((SPMarker *) (shape->marker[i]), NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i);
1044 /* fixme: Do we need explicit remove here? (Lauris) */
1045 /* nr_arena_item_set_mask (v->arenaitem, NULL); */
1046 }
1047 /* Detach marker */
1048 shape->release_connect[i].disconnect();
1049 shape->modified_connect[i].disconnect();
1050 shape->marker[i] = sp_object_hunref (shape->marker[i], item);
1051 }
1052 }
1053 }
1055 /**
1056 * No-op. Exists for handling 'modified' messages
1057 */
1058 static void
1059 sp_shape_marker_modified (SPObject */*marker*/, guint /*flags*/, SPItem */*item*/)
1060 {
1061 /* I think mask does update automagically */
1062 /* g_warning ("Item %s mask %s modified", SP_OBJECT_ID (item), SP_OBJECT_ID (mask)); */
1063 }
1065 /**
1066 * Adds a new marker to shape object at the location indicated by key. value
1067 * must be a valid URI reference resolvable from the shape object (i.e., present
1068 * in the document <defs>). If the shape object already has a marker
1069 * registered at the given position, it is removed first. Then the
1070 * new marker is hrefed and its signals connected.
1071 */
1072 void
1073 sp_shape_set_marker (SPObject *object, unsigned int key, const gchar *value)
1074 {
1075 SPItem *item = (SPItem *) object;
1076 SPShape *shape = (SPShape *) object;
1078 if (key > SP_MARKER_LOC_END) {
1079 return;
1080 }
1082 SPObject *mrk = sp_css_uri_reference_resolve (SP_OBJECT_DOCUMENT (object), value);
1083 if (mrk != shape->marker[key]) {
1084 if (shape->marker[key]) {
1085 SPItemView *v;
1087 /* Detach marker */
1088 shape->release_connect[key].disconnect();
1089 shape->modified_connect[key].disconnect();
1091 /* Hide marker */
1092 for (v = item->display; v != NULL; v = v->next) {
1093 sp_marker_hide ((SPMarker *) (shape->marker[key]),
1094 NR_ARENA_ITEM_GET_KEY (v->arenaitem) + key);
1095 /* fixme: Do we need explicit remove here? (Lauris) */
1096 /* nr_arena_item_set_mask (v->arenaitem, NULL); */
1097 }
1099 /* Unref marker */
1100 shape->marker[key] = sp_object_hunref (shape->marker[key], object);
1101 }
1102 if (SP_IS_MARKER (mrk)) {
1103 shape->marker[key] = sp_object_href (mrk, object);
1104 shape->release_connect[key] = mrk->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_shape_marker_release), shape));
1105 shape->modified_connect[key] = mrk->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_shape_marker_modified), shape));
1106 }
1107 }
1108 }
1112 /* Shape section */
1114 /**
1115 * Calls any registered handlers for the set_shape action
1116 */
1117 void
1118 SPShape::setShape ()
1119 {
1120 //g_return_if_fail (shape != NULL);
1121 //g_return_if_fail (SP_IS_SHAPE (shape));
1123 if (SP_SHAPE_CLASS (G_OBJECT_GET_CLASS (this))->set_shape) {
1124 SP_SHAPE_CLASS (G_OBJECT_GET_CLASS (this))->set_shape (this);
1125 }
1126 }
1128 /**
1129 * Adds a curve to the shape. If owner is specified, a reference
1130 * will be made, otherwise the curve will be copied into the shape.
1131 * Any existing curve in the shape will be unreferenced first.
1132 * This routine also triggers a request to update the display.
1133 */
1134 void
1135 SPShape::setCurve (SPCurve *curve, unsigned int owner)
1136 {
1137 if (this->curve) {
1138 this->curve = this->curve->unref();
1139 }
1140 if (curve) {
1141 if (owner) {
1142 this->curve = curve->ref();
1143 } else {
1144 this->curve = curve->copy();
1145 }
1146 }
1147 SP_OBJECT(this)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
1148 }
1150 /**
1151 * Return duplicate of curve (if any exists) or NULL if there is no curve
1152 */
1153 SPCurve *
1154 SPShape::getCurve ()
1155 {
1156 if (this->curve) {
1157 return this->curve->copy();
1158 }
1159 return NULL;
1160 }
1162 /**
1163 * Same as sp_shape_set_curve but without updating the display
1164 */
1165 void
1166 SPShape::setCurveInsync (SPCurve *curve, unsigned int owner)
1167 {
1168 if (this->curve) {
1169 this->curve = this->curve->unref();
1170 }
1171 if (curve) {
1172 if (owner) {
1173 this->curve = curve->ref();
1174 } else {
1175 this->curve = curve->copy();
1176 }
1177 }
1178 }
1180 /**
1181 * Return all nodes in a path that are to be considered for snapping
1182 */
1183 void SPShape::sp_shape_snappoints(SPItem const *item, std::vector<Inkscape::SnapCandidatePoint> &p, Inkscape::SnapPreferences const *snapprefs)
1184 {
1185 g_assert(item != NULL);
1186 g_assert(SP_IS_SHAPE(item));
1188 SPShape const *shape = SP_SHAPE(item);
1189 if (shape->curve == NULL) {
1190 return;
1191 }
1193 // Help enforcing strict snapping, i.e. only return nodes when we're snapping nodes to nodes or a guide to nodes
1194 if (!(snapprefs->getSnapModeNode() || snapprefs->getSnapModeGuide())) {
1195 return;
1196 }
1198 Geom::PathVector const &pathv = shape->curve->get_pathvector();
1199 if (pathv.empty())
1200 return;
1202 Geom::Matrix const i2d (item->i2d_affine ());
1204 if (snapprefs->getSnapObjectMidpoints()) {
1205 Geom::OptRect bbox = item->getBounds(item->i2d_affine());
1206 if (bbox) {
1207 p.push_back(Inkscape::SnapCandidatePoint(bbox->midpoint(), Inkscape::SNAPSOURCE_OBJECT_MIDPOINT, Inkscape::SNAPTARGET_OBJECT_MIDPOINT));
1208 }
1209 }
1211 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
1212 if (snapprefs->getSnapToItemNode()) {
1213 p.push_back(Inkscape::SnapCandidatePoint(path_it->initialPoint() * i2d, Inkscape::SNAPSOURCE_NODE_CUSP, Inkscape::SNAPTARGET_NODE_CUSP));
1214 }
1216 Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
1217 Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
1218 while (curve_it2 != path_it->end_closed())
1219 {
1220 /* Test whether to add the node between curve_it1 and curve_it2.
1221 * Loop to end_closed (so always including closing segment); the last node to be added
1222 * is the node between the closing segment and the segment before that, regardless
1223 * of the path being closed or not. If the path is closed, the final point was already added by
1224 * adding the initial point. */
1226 Geom::NodeType nodetype = Geom::get_nodetype(*curve_it1, *curve_it2);
1228 bool c1 = snapprefs->getSnapToItemNode() && (nodetype == Geom::NODE_CUSP || nodetype == Geom::NODE_NONE);
1229 bool c2 = snapprefs->getSnapSmoothNodes() && (nodetype == Geom::NODE_SMOOTH || nodetype == Geom::NODE_SYMM);
1231 if (c1 || c2) {
1232 Inkscape::SnapSourceType sst;
1233 Inkscape::SnapTargetType stt;
1234 switch (nodetype) {
1235 case Geom::NODE_CUSP:
1236 sst = Inkscape::SNAPSOURCE_NODE_CUSP;
1237 stt = Inkscape::SNAPTARGET_NODE_CUSP;
1238 break;
1239 case Geom::NODE_SMOOTH:
1240 case Geom::NODE_SYMM:
1241 sst = Inkscape::SNAPSOURCE_NODE_SMOOTH;
1242 stt = Inkscape::SNAPTARGET_NODE_SMOOTH;
1243 break;
1244 default:
1245 sst = Inkscape::SNAPSOURCE_UNDEFINED;
1246 stt = Inkscape::SNAPTARGET_UNDEFINED;
1247 break;
1248 }
1249 p.push_back(Inkscape::SnapCandidatePoint(curve_it1->finalPoint() * i2d, sst, stt));
1250 }
1252 // Consider midpoints of line segments for snapping
1253 if (snapprefs->getSnapLineMidpoints()) { // only do this when we're snapping nodes (enforce strict snapping)
1254 if (Geom::LineSegment const* line_segment = dynamic_cast<Geom::LineSegment const*>(&(*curve_it1))) {
1255 p.push_back(Inkscape::SnapCandidatePoint(Geom::middle_point(*line_segment) * i2d, Inkscape::SNAPSOURCE_LINE_MIDPOINT, Inkscape::SNAPTARGET_LINE_MIDPOINT));
1256 }
1257 }
1259 ++curve_it1;
1260 ++curve_it2;
1261 }
1263 // Find the internal intersections of each path and consider these for snapping
1264 // (using "Method 1" as described in Inkscape::ObjectSnapper::_collectNodes())
1265 if (snapprefs->getSnapIntersectionCS()) {
1266 Geom::Crossings cs;
1267 cs = self_crossings(*path_it);
1268 if (cs.size() > 0) { // There might be multiple intersections...
1269 for (Geom::Crossings::const_iterator i = cs.begin(); i != cs.end(); i++) {
1270 Geom::Point p_ix = (*path_it).pointAt((*i).ta);
1271 p.push_back(Inkscape::SnapCandidatePoint(p_ix * i2d, Inkscape::SNAPSOURCE_PATH_INTERSECTION, Inkscape::SNAPTARGET_PATH_INTERSECTION));
1272 }
1273 }
1274 }
1275 }
1277 }
1279 /*
1280 Local Variables:
1281 mode:c++
1282 c-file-style:"stroustrup"
1283 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1284 indent-tabs-mode:nil
1285 fill-column:99
1286 End:
1287 */
1288 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :