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 /**
80 * Registers the SPShape class with Gdk and returns its type number.
81 */
82 GType
83 sp_shape_get_type (void)
84 {
85 static GType type = 0;
86 if (!type) {
87 GTypeInfo info = {
88 sizeof (SPShapeClass),
89 NULL, NULL,
90 (GClassInitFunc) sp_shape_class_init,
91 NULL, NULL,
92 sizeof (SPShape),
93 16,
94 (GInstanceInitFunc) sp_shape_init,
95 NULL, /* value_table */
96 };
97 type = g_type_register_static (SP_TYPE_LPE_ITEM, "SPShape", &info, (GTypeFlags)0);
98 }
99 return type;
100 }
102 /**
103 * Initializes a SPShapeClass object. Establishes the function pointers to the class'
104 * member routines in the class vtable, and sets pointers to parent classes.
105 */
106 static void
107 sp_shape_class_init (SPShapeClass *klass)
108 {
109 GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
110 SPObjectClass *sp_object_class = SP_OBJECT_CLASS(klass);
111 SPItemClass * item_class = SP_ITEM_CLASS(klass);
112 SPLPEItemClass * lpe_item_class = SP_LPE_ITEM_CLASS(klass);
114 parent_class = (SPLPEItemClass *)g_type_class_peek_parent (klass);
116 gobject_class->finalize = sp_shape_finalize;
118 sp_object_class->build = sp_shape_build;
119 sp_object_class->release = sp_shape_release;
120 sp_object_class->set = sp_shape_set;
121 sp_object_class->update = sp_shape_update;
122 sp_object_class->modified = sp_shape_modified;
123 sp_object_class->write = sp_shape_write;
125 item_class->bbox = sp_shape_bbox;
126 item_class->print = sp_shape_print;
127 item_class->show = sp_shape_show;
128 item_class->hide = sp_shape_hide;
129 item_class->snappoints = sp_shape_snappoints;
130 lpe_item_class->update_patheffect = NULL;
132 klass->set_shape = NULL;
133 }
135 /**
136 * Initializes an SPShape object.
137 */
138 static void
139 sp_shape_init (SPShape *shape)
140 {
141 for ( int i = 0 ; i < SP_MARKER_LOC_QTY ; i++ ) {
142 new (&shape->release_connect[i]) sigc::connection();
143 new (&shape->modified_connect[i]) sigc::connection();
144 shape->marker[i] = NULL;
145 }
146 shape->curve = NULL;
147 }
149 static void
150 sp_shape_finalize (GObject *object)
151 {
152 SPShape *shape=(SPShape *)object;
154 for ( int i = 0 ; i < SP_MARKER_LOC_QTY ; i++ ) {
155 shape->release_connect[i].disconnect();
156 shape->release_connect[i].~connection();
157 shape->modified_connect[i].disconnect();
158 shape->modified_connect[i].~connection();
159 }
161 if (((GObjectClass *) (parent_class))->finalize) {
162 (* ((GObjectClass *) (parent_class))->finalize)(object);
163 }
164 }
166 /**
167 * Virtual build callback for SPMarker.
168 *
169 * This is to be invoked immediately after creation of an SPShape.
170 *
171 * \see sp_object_build()
172 */
173 static void
174 sp_shape_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
175 {
176 if (((SPObjectClass *) (parent_class))->build) {
177 (*((SPObjectClass *) (parent_class))->build) (object, document, repr);
178 }
180 for (int i = 0 ; i < SP_MARKER_LOC_QTY ; i++) {
181 sp_shape_set_marker (object, i, object->style->marker[i].value);
182 }
183 }
185 /**
186 * Removes, releases and unrefs all children of object
187 *
188 * This is the inverse of sp_shape_build(). It must be invoked as soon
189 * as the shape is removed from the tree, even if it is still referenced
190 * by other objects. This routine also disconnects/unrefs markers and
191 * curves attached to it.
192 *
193 * \see sp_object_release()
194 */
195 static void
196 sp_shape_release (SPObject *object)
197 {
198 SPItem *item;
199 SPShape *shape;
200 SPItemView *v;
201 int i;
203 item = (SPItem *) object;
204 shape = (SPShape *) object;
206 for (i = 0; i < SP_MARKER_LOC_QTY; i++) {
207 if (shape->marker[i]) {
208 for (v = item->display; v != NULL; v = v->next) {
209 sp_marker_hide ((SPMarker *) shape->marker[i], NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i);
210 }
211 shape->release_connect[i].disconnect();
212 shape->modified_connect[i].disconnect();
213 shape->marker[i] = sp_object_hunref (shape->marker[i], object);
214 }
215 }
216 if (shape->curve) {
217 shape->curve = shape->curve->unref();
218 }
220 if (((SPObjectClass *) parent_class)->release) {
221 ((SPObjectClass *) parent_class)->release (object);
222 }
223 }
227 static void
228 sp_shape_set(SPObject *object, unsigned int key, gchar const *value)
229 {
230 if (((SPObjectClass *) parent_class)->set) {
231 ((SPObjectClass *) parent_class)->set(object, key, value);
232 }
233 }
235 static Inkscape::XML::Node *
236 sp_shape_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags)
237 {
238 if (((SPObjectClass *)(parent_class))->write) {
239 ((SPObjectClass *)(parent_class))->write(object, doc, repr, flags);
240 }
242 return repr;
243 }
245 /**
246 * Updates the shape when its attributes have changed. Also establishes
247 * marker objects to match the style settings.
248 */
249 static void
250 sp_shape_update (SPObject *object, SPCtx *ctx, unsigned int flags)
251 {
252 SPItem *item = (SPItem *) object;
253 SPShape *shape = (SPShape *) object;
255 if (((SPObjectClass *) (parent_class))->update) {
256 (* ((SPObjectClass *) (parent_class))->update) (object, ctx, flags);
257 }
259 /* This stanza checks that an object's marker style agrees with
260 * the marker objects it has allocated. sp_shape_set_marker ensures
261 * that the appropriate marker objects are present (or absent) to
262 * match the style.
263 */
264 for (int i = 0 ; i < SP_MARKER_LOC_QTY ; i++) {
265 sp_shape_set_marker (object, i, object->style->marker[i].value);
266 }
268 if (flags & (SP_OBJECT_STYLE_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
269 SPStyle *style;
270 style = SP_OBJECT_STYLE (object);
271 if (style->stroke_width.unit == SP_CSS_UNIT_PERCENT) {
272 SPItemCtx *ictx = (SPItemCtx *) ctx;
273 double const aw = 1.0 / NR::expansion(ictx->i2vp);
274 style->stroke_width.computed = style->stroke_width.value * aw;
275 for (SPItemView *v = ((SPItem *) (shape))->display; v != NULL; v = v->next) {
276 nr_arena_shape_set_style ((NRArenaShape *) v->arenaitem, style);
277 }
278 }
279 }
281 if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_PARENT_MODIFIED_FLAG)) {
282 /* This is suboptimal, because changing parent style schedules recalculation */
283 /* But on the other hand - how can we know that parent does not tie style and transform */
284 Geom::OptRect paintbox = SP_ITEM(object)->getBounds(Geom::identity(), SPItem::GEOMETRIC_BBOX);
285 for (SPItemView *v = SP_ITEM (shape)->display; v != NULL; v = v->next) {
286 NRArenaShape * const s = NR_ARENA_SHAPE(v->arenaitem);
287 if (flags & SP_OBJECT_MODIFIED_FLAG) {
288 nr_arena_shape_set_path(s, shape->curve, (flags & SP_OBJECT_USER_MODIFIED_FLAG_B));
289 }
290 if (paintbox) {
291 s->setPaintBox(*paintbox);
292 }
293 }
294 }
296 if (sp_shape_has_markers (shape)) {
297 /* Dimension marker views */
298 for (SPItemView *v = item->display; v != NULL; v = v->next) {
299 if (!v->arenaitem->key) {
300 NR_ARENA_ITEM_SET_KEY (v->arenaitem, sp_item_display_key_new (SP_MARKER_LOC_QTY));
301 }
302 for (int i = 0 ; i < SP_MARKER_LOC_QTY ; i++) {
303 if (shape->marker[i]) {
304 sp_marker_show_dimension ((SPMarker *) shape->marker[i],
305 NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i,
306 sp_shape_number_of_markers (shape, i));
307 }
308 }
309 }
311 /* Update marker views */
312 for (SPItemView *v = item->display; v != NULL; v = v->next) {
313 sp_shape_update_marker_view (shape, v->arenaitem);
314 }
315 }
316 }
318 /**
319 * Calculate the transform required to get a marker's path object in the
320 * right place for particular path segment on a shape.
321 *
322 * \see sp_shape_marker_update_marker_view.
323 *
324 * From SVG spec:
325 * The axes of the temporary new user coordinate system are aligned according to the orient attribute on the 'marker'
326 * element and the slope of the curve at the given vertex. (Note: if there is a discontinuity at a vertex, the slope
327 * is the average of the slopes of the two segments of the curve that join at the given vertex. If a slope cannot be
328 * determined, the slope is assumed to be zero.)
329 *
330 * Reference: http://www.w3.org/TR/SVG11/painting.html#MarkerElement, the `orient' attribute.
331 * Reference for behaviour of zero-length segments:
332 * http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes
333 */
334 Geom::Matrix
335 sp_shape_marker_get_transform(Geom::Curve const & c1, Geom::Curve const & c2)
336 {
337 Geom::Point p = c1.pointAt(1);
338 Geom::Curve * c1_reverse = c1.reverse();
339 Geom::Point tang1 = - c1_reverse->unitTangentAt(0);
340 delete c1_reverse;
341 Geom::Point tang2 = c2.unitTangentAt(0);
343 double const angle1 = Geom::atan2(tang1);
344 double const angle2 = Geom::atan2(tang2);
346 double ret_angle;
347 ret_angle = .5 * (angle1 + angle2);
349 if ( fabs( angle2 - angle1 ) > M_PI ) {
350 /* ret_angle is in the middle of the larger of the two sectors between angle1 and
351 * angle2, so flip it by 180degrees to force it to the middle of the smaller sector.
352 *
353 * (Imagine a circle with rays drawn at angle1 and angle2 from the centre of the
354 * circle. Those two rays divide the circle into two sectors.)
355 */
356 ret_angle += M_PI;
357 }
359 return Geom::Rotate(ret_angle) * Geom::Translate(p);
360 }
361 Geom::Matrix
362 sp_shape_marker_get_transform_at_start(Geom::Curve const & c)
363 {
364 Geom::Point p = c.pointAt(0);
365 Geom::Matrix ret = Geom::Translate(p);
367 if ( !c.isDegenerate() ) {
368 Geom::Point tang = c.unitTangentAt(0);
369 double const angle = Geom::atan2(tang);
370 ret = Geom::Rotate(angle) * Geom::Translate(p);
371 } else {
372 /* FIXME: the svg spec says to search for a better alternative than zero angle directionality:
373 * http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes */
374 }
376 return ret;
377 }
378 Geom::Matrix
379 sp_shape_marker_get_transform_at_end(Geom::Curve const & c)
380 {
381 Geom::Point p = c.pointAt(1);
382 Geom::Matrix ret = Geom::Translate(p);
384 if ( !c.isDegenerate() ) {
385 Geom::Curve * c_reverse = c.reverse();
386 Geom::Point tang = - c_reverse->unitTangentAt(0);
387 delete c_reverse;
388 double const angle = Geom::atan2(tang);
389 ret = Geom::Rotate(angle) * Geom::Translate(p);
390 } else {
391 /* FIXME: the svg spec says to search for a better alternative than zero angle directionality:
392 * http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes */
393 }
395 return ret;
396 }
398 /**
399 * Updates the instances (views) of a given marker in a shape.
400 * Marker views have to be scaled already. The transformation
401 * is retrieved and then shown by calling sp_marker_show_instance.
402 *
403 * @todo figure out what to do when both 'marker' and for instance 'marker-end' are set.
404 */
405 static void
406 sp_shape_update_marker_view (SPShape *shape, NRArenaItem *ai)
407 {
408 SPStyle *style = ((SPObject *) shape)->style;
410 // position arguments to sp_marker_show_instance, basically counts the amount of markers.
411 int counter[4] = {0};
413 if (!shape->curve) return;
414 Geom::PathVector const & pathv = shape->curve->get_pathvector();
415 if (pathv.empty()) return;
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 static void
517 sp_shape_modified (SPObject *object, unsigned int flags)
518 {
519 SPShape *shape = SP_SHAPE (object);
521 if (((SPObjectClass *) (parent_class))->modified) {
522 (* ((SPObjectClass *) (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 static void 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 (sp_shape_has_markers (shape) && !shape->curve->get_pathvector().empty()) {
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 sp_item_invoke_bbox (marker_item, &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 sp_item_invoke_bbox (marker_item, &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 sp_item_invoke_bbox (marker_item, &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 sp_item_invoke_bbox (marker_item, &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 sp_item_invoke_bbox (marker_item, &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 sp_item_invoke_print (marker_item, 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 Geom::PathVector const & pathv = shape->curve->get_pathvector();
773 if (pathv.empty()) return;
775 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
776 gint add_comments = prefs->getBool("/printing/debug/add-label-comments");
777 if (add_comments) {
778 gchar * comment = g_strdup_printf("begin '%s'",
779 SP_OBJECT(item)->defaultLabel());
780 sp_print_comment(ctx, comment);
781 g_free(comment);
782 }
784 /* fixme: Think (Lauris) */
785 sp_item_invoke_bbox(item, &pbox, Geom::identity(), TRUE);
786 dbox.x0 = 0.0;
787 dbox.y0 = 0.0;
788 dbox.x1 = sp_document_width (SP_OBJECT_DOCUMENT (item));
789 dbox.y1 = sp_document_height (SP_OBJECT_DOCUMENT (item));
790 sp_item_bbox_desktop (item, &bbox);
791 Geom::Matrix const i2d(sp_item_i2d_affine(item));
793 SPStyle* style = SP_OBJECT_STYLE (item);
795 if (!style->fill.isNone()) {
796 sp_print_fill (ctx, pathv, &i2d, style, &pbox, &dbox, &bbox);
797 }
799 if (!style->stroke.isNone()) {
800 sp_print_stroke (ctx, pathv, &i2d, style, &pbox, &dbox, &bbox);
801 }
803 /** \todo make code prettier */
804 // START marker
805 for (int i = 0; i < 2; i++) { // SP_MARKER_LOC and SP_MARKER_LOC_START
806 if ( shape->marker[i] ) {
807 Geom::Matrix tr(sp_shape_marker_get_transform_at_start(pathv.begin()->front()));
808 sp_shape_print_invoke_marker_printing(shape->marker[i], tr, style, ctx);
809 }
810 }
811 // MID marker
812 for (int i = 0; i < 3; i += 2) { // SP_MARKER_LOC and SP_MARKER_LOC_MID
813 if (shape->marker[i]) {
814 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
815 // START position
816 if ( path_it != pathv.begin()
817 && ! ((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
818 {
819 Geom::Matrix tr(sp_shape_marker_get_transform_at_start(path_it->front()));
820 sp_shape_print_invoke_marker_printing(shape->marker[i], tr, style, ctx);
821 }
822 // MID position
823 if ( path_it->size_default() > 1) {
824 Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
825 Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
826 while (curve_it2 != path_it->end_default())
827 {
828 /* Put marker between curve_it1 and curve_it2.
829 * Loop to end_default (so including closing segment), because when a path is closed,
830 * there should be a midpoint marker between last segment and closing straight line segment */
831 Geom::Matrix tr(sp_shape_marker_get_transform(*curve_it1, *curve_it2));
833 sp_shape_print_invoke_marker_printing(shape->marker[i], tr, style, ctx);
835 ++curve_it1;
836 ++curve_it2;
837 }
838 }
839 if ( path_it != (pathv.end()-1) && !path_it->empty()) {
840 Geom::Curve const &lastcurve = path_it->back_default();
841 Geom::Matrix tr = sp_shape_marker_get_transform_at_end(lastcurve);
842 sp_shape_print_invoke_marker_printing(shape->marker[i], tr, style, ctx);
843 }
844 }
845 }
846 }
847 // END marker
848 if ( shape->marker[SP_MARKER_LOC_END] || shape->marker[SP_MARKER_LOC]) {
849 /* Get reference to last curve in the path.
850 * For moveto-only path, this returns the "closing line segment". */
851 Geom::Path const &path_last = pathv.back();
852 unsigned int index = path_last.size_default();
853 if (index > 0) {
854 index--;
855 }
856 Geom::Curve const &lastcurve = path_last[index];
858 Geom::Matrix tr = sp_shape_marker_get_transform_at_end(lastcurve);
860 for (int i = 0; i < 4; i += 3) { // SP_MARKER_LOC and SP_MARKER_LOC_END
861 if (shape->marker[i]) {
862 sp_shape_print_invoke_marker_printing(shape->marker[i], tr, style, ctx);
863 }
864 }
865 }
867 if (add_comments) {
868 gchar * comment = g_strdup_printf("end '%s'",
869 SP_OBJECT(item)->defaultLabel());
870 sp_print_comment(ctx, comment);
871 g_free(comment);
872 }
873 }
875 /**
876 * Sets style, path, and paintbox. Updates marker views, including dimensions.
877 */
878 static NRArenaItem *
879 sp_shape_show (SPItem *item, NRArena *arena, unsigned int /*key*/, unsigned int /*flags*/)
880 {
881 SPObject *object = SP_OBJECT(item);
882 SPShape *shape = SP_SHAPE(item);
884 NRArenaItem *arenaitem = NRArenaShape::create(arena);
885 NRArenaShape * const s = NR_ARENA_SHAPE(arenaitem);
886 nr_arena_shape_set_style(s, object->style);
887 nr_arena_shape_set_path(s, shape->curve, false);
888 Geom::OptRect paintbox = item->getBounds(Geom::identity());
889 if (paintbox) {
890 s->setPaintBox(*paintbox);
891 }
893 /* This stanza checks that an object's marker style agrees with
894 * the marker objects it has allocated. sp_shape_set_marker ensures
895 * that the appropriate marker objects are present (or absent) to
896 * match the style.
897 */
898 for (int i = 0 ; i < SP_MARKER_LOC_QTY ; i++) {
899 sp_shape_set_marker (object, i, object->style->marker[i].value);
900 }
902 if (sp_shape_has_markers (shape)) {
904 /* provide key and dimension the marker views */
905 if (!arenaitem->key) {
906 NR_ARENA_ITEM_SET_KEY (arenaitem, sp_item_display_key_new (SP_MARKER_LOC_QTY));
907 }
909 for (int i = 0; i < SP_MARKER_LOC_QTY; i++) {
910 if (shape->marker[i]) {
911 sp_marker_show_dimension ((SPMarker *) shape->marker[i],
912 NR_ARENA_ITEM_GET_KEY (arenaitem) + i,
913 sp_shape_number_of_markers (shape, i));
914 }
915 }
917 /* Update marker views */
918 sp_shape_update_marker_view (shape, arenaitem);
919 }
921 return arenaitem;
922 }
924 /**
925 * Hides/removes marker views from the shape.
926 */
927 static void
928 sp_shape_hide (SPItem *item, unsigned int key)
929 {
930 SPShape *shape;
931 SPItemView *v;
932 int i;
934 shape = (SPShape *) item;
936 for (i=0; i<SP_MARKER_LOC_QTY; i++) {
937 if (shape->marker[i]) {
938 for (v = item->display; v != NULL; v = v->next) {
939 if (key == v->key) {
940 sp_marker_hide ((SPMarker *) shape->marker[i],
941 NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i);
942 }
943 }
944 }
945 }
947 if (((SPItemClass *) parent_class)->hide) {
948 ((SPItemClass *) parent_class)->hide (item, key);
949 }
950 }
952 /**
953 * \param shape Shape.
954 * \return TRUE if the shape has any markers, or FALSE if not.
955 */
956 int
957 sp_shape_has_markers (SPShape const *shape)
958 {
959 /* Note, we're ignoring 'marker' settings, which technically should apply for
960 all three settings. This should be fixed later such that if 'marker' is
961 specified, then all three should appear. */
963 return (
964 shape->curve &&
965 (shape->marker[SP_MARKER_LOC] ||
966 shape->marker[SP_MARKER_LOC_START] ||
967 shape->marker[SP_MARKER_LOC_MID] ||
968 shape->marker[SP_MARKER_LOC_END])
969 );
970 }
973 /**
974 * \param shape Shape.
975 * \param type Marker type (e.g. SP_MARKER_LOC_START)
976 * \return Number of markers that the shape has of this type.
977 */
978 int
979 sp_shape_number_of_markers (SPShape *shape, int type)
980 {
981 Geom::PathVector const & pathv = shape->curve->get_pathvector();
982 if (pathv.size() == 0) {
983 return 0;
984 }
986 switch(type) {
987 case SP_MARKER_LOC:
988 {
989 if ( shape->marker[SP_MARKER_LOC] ) {
990 guint n = 0;
991 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
992 n += path_it->size_default() + 1;
993 }
994 return n;
995 } else {
996 return 0;
997 }
998 }
999 case SP_MARKER_LOC_START:
1000 // there is only a start marker on the first path of a pathvector
1001 return shape->marker[SP_MARKER_LOC_START] ? 1 : 0;
1003 case SP_MARKER_LOC_MID:
1004 {
1005 if ( shape->marker[SP_MARKER_LOC_MID] ) {
1006 guint n = 0;
1007 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
1008 n += path_it->size_default() + 1;
1009 }
1010 return n - 2; // minus the start and end marker.
1011 } else {
1012 return 0;
1013 }
1014 }
1016 case SP_MARKER_LOC_END:
1017 {
1018 // there is only an end marker on the last path of a pathvector
1019 return shape->marker[SP_MARKER_LOC_END] ? 1 : 0;
1020 }
1022 default:
1023 return 0;
1024 }
1025 }
1027 /**
1028 * Checks if the given marker is used in the shape, and if so, it
1029 * releases it by calling sp_marker_hide. Also detaches signals
1030 * and unrefs the marker from the shape.
1031 */
1032 static void
1033 sp_shape_marker_release (SPObject *marker, SPShape *shape)
1034 {
1035 SPItem *item;
1036 int i;
1038 item = (SPItem *) shape;
1040 for (i = 0; i < SP_MARKER_LOC_QTY; i++) {
1041 if (marker == shape->marker[i]) {
1042 SPItemView *v;
1043 /* Hide marker */
1044 for (v = item->display; v != NULL; v = v->next) {
1045 sp_marker_hide ((SPMarker *) (shape->marker[i]), NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i);
1046 /* fixme: Do we need explicit remove here? (Lauris) */
1047 /* nr_arena_item_set_mask (v->arenaitem, NULL); */
1048 }
1049 /* Detach marker */
1050 shape->release_connect[i].disconnect();
1051 shape->modified_connect[i].disconnect();
1052 shape->marker[i] = sp_object_hunref (shape->marker[i], item);
1053 }
1054 }
1055 }
1057 /**
1058 * No-op. Exists for handling 'modified' messages
1059 */
1060 static void
1061 sp_shape_marker_modified (SPObject */*marker*/, guint /*flags*/, SPItem */*item*/)
1062 {
1063 /* I think mask does update automagically */
1064 /* g_warning ("Item %s mask %s modified", SP_OBJECT_ID (item), SP_OBJECT_ID (mask)); */
1065 }
1067 /**
1068 * Adds a new marker to shape object at the location indicated by key. value
1069 * must be a valid URI reference resolvable from the shape object (i.e., present
1070 * in the document <defs>). If the shape object already has a marker
1071 * registered at the given position, it is removed first. Then the
1072 * new marker is hrefed and its signals connected.
1073 */
1074 void
1075 sp_shape_set_marker (SPObject *object, unsigned int key, const gchar *value)
1076 {
1077 SPItem *item = (SPItem *) object;
1078 SPShape *shape = (SPShape *) object;
1080 if (key > SP_MARKER_LOC_END) {
1081 return;
1082 }
1084 SPObject *mrk = sp_css_uri_reference_resolve (SP_OBJECT_DOCUMENT (object), value);
1085 if (mrk != shape->marker[key]) {
1086 if (shape->marker[key]) {
1087 SPItemView *v;
1089 /* Detach marker */
1090 shape->release_connect[key].disconnect();
1091 shape->modified_connect[key].disconnect();
1093 /* Hide marker */
1094 for (v = item->display; v != NULL; v = v->next) {
1095 sp_marker_hide ((SPMarker *) (shape->marker[key]),
1096 NR_ARENA_ITEM_GET_KEY (v->arenaitem) + key);
1097 /* fixme: Do we need explicit remove here? (Lauris) */
1098 /* nr_arena_item_set_mask (v->arenaitem, NULL); */
1099 }
1101 /* Unref marker */
1102 shape->marker[key] = sp_object_hunref (shape->marker[key], object);
1103 }
1104 if (SP_IS_MARKER (mrk)) {
1105 shape->marker[key] = sp_object_href (mrk, object);
1106 shape->release_connect[key] = mrk->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_shape_marker_release), shape));
1107 shape->modified_connect[key] = mrk->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_shape_marker_modified), shape));
1108 }
1109 }
1110 }
1114 /* Shape section */
1116 /**
1117 * Calls any registered handlers for the set_shape action
1118 */
1119 void
1120 sp_shape_set_shape (SPShape *shape)
1121 {
1122 g_return_if_fail (shape != NULL);
1123 g_return_if_fail (SP_IS_SHAPE (shape));
1125 if (SP_SHAPE_CLASS (G_OBJECT_GET_CLASS (shape))->set_shape) {
1126 SP_SHAPE_CLASS (G_OBJECT_GET_CLASS (shape))->set_shape (shape);
1127 }
1128 }
1130 /**
1131 * Adds a curve to the shape. If owner is specified, a reference
1132 * will be made, otherwise the curve will be copied into the shape.
1133 * Any existing curve in the shape will be unreferenced first.
1134 * This routine also triggers a request to update the display.
1135 */
1136 void
1137 sp_shape_set_curve (SPShape *shape, SPCurve *curve, unsigned int owner)
1138 {
1139 if (shape->curve) {
1140 shape->curve = shape->curve->unref();
1141 }
1142 if (curve) {
1143 if (owner) {
1144 shape->curve = curve->ref();
1145 } else {
1146 shape->curve = curve->copy();
1147 }
1148 }
1149 SP_OBJECT(shape)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
1150 }
1152 /**
1153 * Return duplicate of curve (if any exists) or NULL if there is no curve
1154 */
1155 SPCurve *
1156 sp_shape_get_curve (SPShape *shape)
1157 {
1158 if (shape->curve) {
1159 return shape->curve->copy();
1160 }
1161 return NULL;
1162 }
1164 /**
1165 * Same as sp_shape_set_curve but without updating the display
1166 */
1167 void
1168 sp_shape_set_curve_insync (SPShape *shape, SPCurve *curve, unsigned int owner)
1169 {
1170 if (shape->curve) {
1171 shape->curve = shape->curve->unref();
1172 }
1173 if (curve) {
1174 if (owner) {
1175 shape->curve = curve->ref();
1176 } else {
1177 shape->curve = curve->copy();
1178 }
1179 }
1180 }
1182 /**
1183 * Return all nodes in a path that are to be considered for snapping
1184 */
1185 static void sp_shape_snappoints(SPItem const *item, std::vector<Inkscape::SnapCandidatePoint> &p, Inkscape::SnapPreferences const *snapprefs)
1186 {
1187 g_assert(item != NULL);
1188 g_assert(SP_IS_SHAPE(item));
1190 SPShape const *shape = SP_SHAPE(item);
1191 if (shape->curve == NULL) {
1192 return;
1193 }
1195 // Help enforcing strict snapping, i.e. only return nodes when we're snapping nodes to nodes or a guide to nodes
1196 if (!(snapprefs->getSnapModeNode() || snapprefs->getSnapModeGuide())) {
1197 return;
1198 }
1200 Geom::PathVector const &pathv = shape->curve->get_pathvector();
1201 if (pathv.empty())
1202 return;
1204 Geom::Matrix const i2d (sp_item_i2d_affine (item));
1206 if (snapprefs->getSnapObjectMidpoints()) {
1207 Geom::OptRect bbox = item->getBounds(sp_item_i2d_affine(item));
1208 if (bbox) {
1209 p.push_back(Inkscape::SnapCandidatePoint(bbox->midpoint(), Inkscape::SNAPSOURCE_OBJECT_MIDPOINT, Inkscape::SNAPTARGET_OBJECT_MIDPOINT));
1210 }
1211 }
1213 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
1214 if (snapprefs->getSnapToItemNode()) {
1215 // Add the first point of the path
1216 p.push_back(Inkscape::SnapCandidatePoint(path_it->initialPoint() * i2d, Inkscape::SNAPSOURCE_NODE_CUSP, Inkscape::SNAPTARGET_NODE_CUSP));
1217 }
1219 Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
1220 Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
1221 while (curve_it1 != path_it->end_default())
1222 {
1223 // For each path: consider midpoints of line segments for snapping
1224 if (snapprefs->getSnapLineMidpoints()) { // only do this when we're snapping nodes (enforces strict snapping)
1225 if (Geom::LineSegment const* line_segment = dynamic_cast<Geom::LineSegment const*>(&(*curve_it1))) {
1226 p.push_back(Inkscape::SnapCandidatePoint(Geom::middle_point(*line_segment) * i2d, Inkscape::SNAPSOURCE_LINE_MIDPOINT, Inkscape::SNAPTARGET_LINE_MIDPOINT));
1227 }
1228 }
1230 if (curve_it2 == path_it->end_default()) { // Test will only pass for the last iteration of the while loop
1231 if (snapprefs->getSnapToItemNode() && !path_it->closed()) {
1232 // Add the last point of the path, but only for open paths
1233 // (for closed paths the first and last point will coincide)
1234 p.push_back(Inkscape::SnapCandidatePoint((*curve_it1).finalPoint() * i2d, Inkscape::SNAPSOURCE_NODE_CUSP, Inkscape::SNAPTARGET_NODE_CUSP));
1235 }
1236 } else {
1237 /* Test whether to add the node between curve_it1 and curve_it2.
1238 * Loop to end_default (so only iterating through the stroked part); */
1240 Geom::NodeType nodetype = Geom::get_nodetype(*curve_it1, *curve_it2);
1242 bool c1 = snapprefs->getSnapToItemNode() && (nodetype == Geom::NODE_CUSP || nodetype == Geom::NODE_NONE);
1243 bool c2 = snapprefs->getSnapSmoothNodes() && (nodetype == Geom::NODE_SMOOTH || nodetype == Geom::NODE_SYMM);
1245 if (c1 || c2) {
1246 Inkscape::SnapSourceType sst;
1247 Inkscape::SnapTargetType stt;
1248 switch (nodetype) {
1249 case Geom::NODE_CUSP:
1250 sst = Inkscape::SNAPSOURCE_NODE_CUSP;
1251 stt = Inkscape::SNAPTARGET_NODE_CUSP;
1252 break;
1253 case Geom::NODE_SMOOTH:
1254 case Geom::NODE_SYMM:
1255 sst = Inkscape::SNAPSOURCE_NODE_SMOOTH;
1256 stt = Inkscape::SNAPTARGET_NODE_SMOOTH;
1257 break;
1258 default:
1259 sst = Inkscape::SNAPSOURCE_UNDEFINED;
1260 stt = Inkscape::SNAPTARGET_UNDEFINED;
1261 break;
1262 }
1263 p.push_back(Inkscape::SnapCandidatePoint(curve_it1->finalPoint() * i2d, sst, stt));
1264 }
1265 }
1267 ++curve_it1;
1268 ++curve_it2;
1269 }
1271 // Find the internal intersections of each path and consider these for snapping
1272 // (using "Method 1" as described in Inkscape::ObjectSnapper::_collectNodes())
1273 if (snapprefs->getSnapIntersectionCS()) {
1274 Geom::Crossings cs;
1275 cs = self_crossings(*path_it);
1276 if (cs.size() > 0) { // There might be multiple intersections...
1277 for (Geom::Crossings::const_iterator i = cs.begin(); i != cs.end(); i++) {
1278 Geom::Point p_ix = (*path_it).pointAt((*i).ta);
1279 p.push_back(Inkscape::SnapCandidatePoint(p_ix * i2d, Inkscape::SNAPSOURCE_PATH_INTERSECTION, Inkscape::SNAPTARGET_PATH_INTERSECTION));
1280 }
1281 }
1282 }
1283 }
1285 }
1287 /*
1288 Local Variables:
1289 mode:c++
1290 c-file-style:"stroustrup"
1291 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1292 indent-tabs-mode:nil
1293 fill-column:99
1294 End:
1295 */
1296 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :