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 "helper/geom.h"
27 #include "helper/geom-nodetype.h"
29 #include <sigc++/functors/ptr_fun.h>
30 #include <sigc++/adaptors/bind.h>
32 #include "macros.h"
33 #include "display/nr-arena-shape.h"
34 #include "display/curve.h"
35 #include "print.h"
36 #include "document.h"
37 #include "style.h"
38 #include "marker.h"
39 #include "sp-path.h"
40 #include "prefs-utils.h"
41 #include "attributes.h"
43 #include "live_effects/lpeobject.h"
44 #include "uri.h"
45 #include "extract-uri.h"
46 #include "uri-references.h"
47 #include "bad-uri-exception.h"
48 #include "xml/repr.h"
50 #include "util/mathfns.h" // for triangle_area()
52 #define noSHAPE_VERBOSE
54 static void sp_shape_class_init (SPShapeClass *klass);
55 static void sp_shape_init (SPShape *shape);
56 static void sp_shape_finalize (GObject *object);
58 static void sp_shape_build (SPObject * object, SPDocument * document, Inkscape::XML::Node * repr);
59 static void sp_shape_release (SPObject *object);
61 static void sp_shape_set(SPObject *object, unsigned key, gchar const *value);
62 static void sp_shape_update (SPObject *object, SPCtx *ctx, unsigned int flags);
63 static void sp_shape_modified (SPObject *object, unsigned int flags);
64 static Inkscape::XML::Node *sp_shape_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
66 static void sp_shape_bbox(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags);
67 void sp_shape_print (SPItem * item, SPPrintContext * ctx);
68 static NRArenaItem *sp_shape_show (SPItem *item, NRArena *arena, unsigned int key, unsigned int flags);
69 static void sp_shape_hide (SPItem *item, unsigned int key);
70 static void sp_shape_snappoints (SPItem const *item, SnapPointsIter p);
72 static void sp_shape_update_marker_view (SPShape *shape, NRArenaItem *ai);
74 static SPLPEItemClass *parent_class;
76 /**
77 * Registers the SPShape class with Gdk and returns its type number.
78 */
79 GType
80 sp_shape_get_type (void)
81 {
82 static GType type = 0;
83 if (!type) {
84 GTypeInfo info = {
85 sizeof (SPShapeClass),
86 NULL, NULL,
87 (GClassInitFunc) sp_shape_class_init,
88 NULL, NULL,
89 sizeof (SPShape),
90 16,
91 (GInstanceInitFunc) sp_shape_init,
92 NULL, /* value_table */
93 };
94 type = g_type_register_static (SP_TYPE_LPE_ITEM, "SPShape", &info, (GTypeFlags)0);
95 }
96 return type;
97 }
99 /**
100 * Initializes a SPShapeClass object. Establishes the function pointers to the class'
101 * member routines in the class vtable, and sets pointers to parent classes.
102 */
103 static void
104 sp_shape_class_init (SPShapeClass *klass)
105 {
106 GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
107 SPObjectClass *sp_object_class = SP_OBJECT_CLASS(klass);
108 SPItemClass * item_class = SP_ITEM_CLASS(klass);
109 SPLPEItemClass * lpe_item_class = SP_LPE_ITEM_CLASS(klass);
111 parent_class = (SPLPEItemClass *)g_type_class_peek_parent (klass);
113 gobject_class->finalize = sp_shape_finalize;
115 sp_object_class->build = sp_shape_build;
116 sp_object_class->release = sp_shape_release;
117 sp_object_class->set = sp_shape_set;
118 sp_object_class->update = sp_shape_update;
119 sp_object_class->modified = sp_shape_modified;
120 sp_object_class->write = sp_shape_write;
122 item_class->bbox = sp_shape_bbox;
123 item_class->print = sp_shape_print;
124 item_class->show = sp_shape_show;
125 item_class->hide = sp_shape_hide;
126 item_class->snappoints = sp_shape_snappoints;
127 lpe_item_class->update_patheffect = NULL;
129 klass->set_shape = NULL;
130 }
132 /**
133 * Initializes an SPShape object.
134 */
135 static void
136 sp_shape_init (SPShape *shape)
137 {
138 for ( int i = 0 ; i < SP_MARKER_LOC_QTY ; i++ ) {
139 new (&shape->release_connect[i]) sigc::connection();
140 new (&shape->modified_connect[i]) sigc::connection();
141 }
142 }
144 static void
145 sp_shape_finalize (GObject *object)
146 {
147 SPShape *shape=(SPShape *)object;
149 for ( int i = 0 ; i < SP_MARKER_LOC_QTY ; i++ ) {
150 shape->release_connect[i].disconnect();
151 shape->release_connect[i].~connection();
152 shape->modified_connect[i].disconnect();
153 shape->modified_connect[i].~connection();
154 }
156 if (((GObjectClass *) (parent_class))->finalize) {
157 (* ((GObjectClass *) (parent_class))->finalize)(object);
158 }
159 }
161 /**
162 * Virtual build callback for SPMarker.
163 *
164 * This is to be invoked immediately after creation of an SPShape.
165 *
166 * \see sp_object_build()
167 */
168 static void
169 sp_shape_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
170 {
171 if (((SPObjectClass *) (parent_class))->build) {
172 (*((SPObjectClass *) (parent_class))->build) (object, document, repr);
173 }
174 }
176 /**
177 * Removes, releases and unrefs all children of object
178 *
179 * This is the inverse of sp_shape_build(). It must be invoked as soon
180 * as the shape is removed from the tree, even if it is still referenced
181 * by other objects. This routine also disconnects/unrefs markers and
182 * curves attached to it.
183 *
184 * \see sp_object_release()
185 */
186 static void
187 sp_shape_release (SPObject *object)
188 {
189 SPItem *item;
190 SPShape *shape;
191 SPItemView *v;
192 int i;
194 item = (SPItem *) object;
195 shape = (SPShape *) object;
197 for (i=SP_MARKER_LOC_START; i<SP_MARKER_LOC_QTY; i++) {
198 if (shape->marker[i]) {
199 sp_signal_disconnect_by_data (shape->marker[i], object);
200 for (v = item->display; v != NULL; v = v->next) {
201 sp_marker_hide ((SPMarker *) shape->marker[i], NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i);
202 }
203 shape->marker[i] = sp_object_hunref (shape->marker[i], object);
204 }
205 }
206 if (shape->curve) {
207 shape->curve = shape->curve->unref();
208 }
210 if (((SPObjectClass *) parent_class)->release) {
211 ((SPObjectClass *) parent_class)->release (object);
212 }
213 }
217 static void
218 sp_shape_set(SPObject *object, unsigned int key, gchar const *value)
219 {
220 if (((SPObjectClass *) parent_class)->set) {
221 ((SPObjectClass *) parent_class)->set(object, key, value);
222 }
223 }
225 static Inkscape::XML::Node *
226 sp_shape_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags)
227 {
228 if (((SPObjectClass *)(parent_class))->write) {
229 ((SPObjectClass *)(parent_class))->write(object, doc, repr, flags);
230 }
232 return repr;
233 }
235 /**
236 * Updates the shape when its attributes have changed. Also establishes
237 * marker objects to match the style settings.
238 */
239 static void
240 sp_shape_update (SPObject *object, SPCtx *ctx, unsigned int flags)
241 {
242 SPItem *item = (SPItem *) object;
243 SPShape *shape = (SPShape *) object;
245 if (((SPObjectClass *) (parent_class))->update) {
246 (* ((SPObjectClass *) (parent_class))->update) (object, ctx, flags);
247 }
249 /* This stanza checks that an object's marker style agrees with
250 * the marker objects it has allocated. sp_shape_set_marker ensures
251 * that the appropriate marker objects are present (or absent) to
252 * match the style.
253 */
254 /* TODO: It would be nice if this could be done at an earlier level */
255 for (int i = 0 ; i < SP_MARKER_LOC_QTY ; i++) {
256 sp_shape_set_marker (object, i, object->style->marker[i].value);
257 }
259 if (flags & (SP_OBJECT_STYLE_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
260 SPStyle *style;
261 style = SP_OBJECT_STYLE (object);
262 if (style->stroke_width.unit == SP_CSS_UNIT_PERCENT) {
263 SPItemCtx *ictx = (SPItemCtx *) ctx;
264 double const aw = 1.0 / NR::expansion(ictx->i2vp);
265 style->stroke_width.computed = style->stroke_width.value * aw;
266 for (SPItemView *v = ((SPItem *) (shape))->display; v != NULL; v = v->next) {
267 nr_arena_shape_set_style ((NRArenaShape *) v->arenaitem, style);
268 }
269 }
270 }
272 if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_PARENT_MODIFIED_FLAG)) {
273 /* This is suboptimal, because changing parent style schedules recalculation */
274 /* But on the other hand - how can we know that parent does not tie style and transform */
275 NR::Maybe<NR::Rect> paintbox = SP_ITEM(object)->getBounds(NR::identity());
276 for (SPItemView *v = SP_ITEM (shape)->display; v != NULL; v = v->next) {
277 NRArenaShape * const s = NR_ARENA_SHAPE(v->arenaitem);
278 if (flags & SP_OBJECT_MODIFIED_FLAG) {
279 nr_arena_shape_set_path(s, shape->curve, (flags & SP_OBJECT_USER_MODIFIED_FLAG_B));
280 }
281 if (paintbox) {
282 s->setPaintBox(*paintbox);
283 }
284 }
285 }
287 if (sp_shape_has_markers (shape)) {
289 /* Dimension marker views */
290 for (SPItemView *v = item->display; v != NULL; v = v->next) {
292 if (!v->arenaitem->key) {
293 /* Get enough keys for all, start, mid and end marker types,
294 ** and set this view's arenaitem key to the first of these keys.
295 */
296 NR_ARENA_ITEM_SET_KEY (
297 v->arenaitem,
298 sp_item_display_key_new (SP_MARKER_LOC_QTY)
299 );
300 }
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 - SP_MARKER_LOC,
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::Point tang = c.unitTangentAt(0);
367 double const angle = Geom::atan2(tang);
369 return Geom::Rotate(angle) * Geom::Translate(p);
370 }
371 Geom::Matrix
372 sp_shape_marker_get_transform_at_end(Geom::Curve const & c)
373 {
374 Geom::Point p = c.pointAt(1);
375 Geom::Curve * c_reverse = c.reverse();
376 Geom::Point tang = - c_reverse->unitTangentAt(0);
377 delete c_reverse;
379 double const angle = Geom::atan2(tang);
381 return Geom::Rotate(angle) * Geom::Translate(p);
382 }
384 /**
385 * Updates the instances (views) of a given marker in a shape.
386 * Marker views have to be scaled already. The transformation
387 * is retrieved and then shown by calling sp_marker_show_instance.
388 *
389 * TODO: correctly handle the 'marker' attribute.
390 * "Using the marker property from a style sheet is equivalent to using all three (start, mid, end)."
391 * See painting-marker-03-f.svg in SVG 1.1 Full test suite.
392 */
393 static void
394 sp_shape_update_marker_view (SPShape *shape, NRArenaItem *ai)
395 {
396 SPStyle *style = ((SPObject *) shape)->style;
398 // position arguments to sp_marker_show_instance, basically counts the amount of markers.
399 int start_pos = 0;
400 int mid_pos = 0;
401 int end_pos = 0;
403 Geom::PathVector const & pathv = shape->curve->get_pathvector();
404 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
405 if ( shape->marker[SP_MARKER_LOC_START] ) {
406 Geom::Matrix const m (sp_shape_marker_get_transform_at_start(path_it->front()));
407 sp_marker_show_instance ((SPMarker* ) shape->marker[SP_MARKER_LOC_START], ai,
408 NR_ARENA_ITEM_GET_KEY(ai) + SP_MARKER_LOC_START, start_pos, m,
409 style->stroke_width.computed);
410 start_pos++;
411 }
413 if ( shape->marker[SP_MARKER_LOC_MID] ) {
414 Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
415 Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
416 while (curve_it2 != path_it->end_default())
417 {
418 /* Put marker between curve_it1 and curve_it2.
419 * Loop to end_default (so including closing segment), because when a path is closed,
420 * there should be a midpoint marker between last segment and closing straight line segment
421 */
422 Geom::Matrix const m (sp_shape_marker_get_transform(*curve_it1, *curve_it2));
423 sp_marker_show_instance ((SPMarker* ) shape->marker[SP_MARKER_LOC_MID], ai,
424 NR_ARENA_ITEM_GET_KEY(ai) + SP_MARKER_LOC_MID, mid_pos, m,
425 style->stroke_width.computed);
426 mid_pos++;
428 ++curve_it1;
429 ++curve_it2;
430 }
431 }
433 if ( shape->marker[SP_MARKER_LOC_END] ) {
434 Geom::Matrix const m (sp_shape_marker_get_transform_at_end(path_it->back_default()));
435 sp_marker_show_instance ((SPMarker* ) shape->marker[SP_MARKER_LOC_END], ai,
436 NR_ARENA_ITEM_GET_KEY(ai) + SP_MARKER_LOC_END, end_pos, m,
437 style->stroke_width.computed);
438 end_pos++;
439 }
440 }
441 }
443 /**
444 * Sets modified flag for all sub-item views.
445 */
446 static void
447 sp_shape_modified (SPObject *object, unsigned int flags)
448 {
449 SPShape *shape = SP_SHAPE (object);
451 if (((SPObjectClass *) (parent_class))->modified) {
452 (* ((SPObjectClass *) (parent_class))->modified) (object, flags);
453 }
455 if (flags & SP_OBJECT_STYLE_MODIFIED_FLAG) {
456 for (SPItemView *v = SP_ITEM (shape)->display; v != NULL; v = v->next) {
457 nr_arena_shape_set_style (NR_ARENA_SHAPE (v->arenaitem), object->style);
458 }
459 }
460 }
462 /**
463 * Calculates the bounding box for item, storing it into bbox.
464 * This also includes the bounding boxes of any markers included in the shape.
465 */
466 static void sp_shape_bbox(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags)
467 {
468 SPShape const *shape = SP_SHAPE (item);
470 if (shape->curve) {
472 NRRect cbbox;
474 Geom::Rect geombbox = bounds_exact_transformed(shape->curve->get_pathvector(), to_2geom(transform));
475 cbbox.x0 = geombbox[0][0];
476 cbbox.y0 = geombbox[1][0];
477 cbbox.x1 = geombbox[0][1];
478 cbbox.y1 = geombbox[1][1];
480 if ((SPItem::BBoxType) flags != SPItem::GEOMETRIC_BBOX) {
482 SPStyle* style=SP_OBJECT_STYLE (item);
483 if (!style->stroke.isNone()) {
484 double const scale = expansion(transform);
485 if ( fabs(style->stroke_width.computed * scale) > 0.01 ) { // sinon c'est 0=oon veut pas de bord
486 double const width = MAX(0.125, style->stroke_width.computed * scale);
487 if ( fabs(cbbox.x1-cbbox.x0) > -0.00001 && fabs(cbbox.y1-cbbox.y0) > -0.00001 ) {
488 cbbox.x0-=0.5*width;
489 cbbox.x1+=0.5*width;
490 cbbox.y0-=0.5*width;
491 cbbox.y1+=0.5*width;
492 }
493 }
494 }
496 // Union with bboxes of the markers, if any
497 if (sp_shape_has_markers (shape)) {
498 /* TODO: make code prettier: lots of variables can be taken out of the loop! */
499 Geom::PathVector const & pathv = shape->curve->get_pathvector();
500 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
501 if ( shape->marker[SP_MARKER_LOC_START] ) {
502 SPMarker* marker = SP_MARKER (shape->marker[SP_MARKER_LOC_START]);
503 SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[SP_MARKER_LOC_START]));
505 NR::Matrix tr(from_2geom(sp_shape_marker_get_transform_at_start(path_it->front())));
507 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
508 tr = NR::scale(style->stroke_width.computed) * tr;
509 }
511 // total marker transform
512 tr = marker_item->transform * marker->c2p * tr * transform;
514 // get bbox of the marker with that transform
515 NRRect marker_bbox;
516 sp_item_invoke_bbox (marker_item, &marker_bbox, tr, true);
517 // union it with the shape bbox
518 nr_rect_d_union (&cbbox, &cbbox, &marker_bbox);
519 }
521 if ( shape->marker[SP_MARKER_LOC_MID] ) {
522 Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
523 Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
524 while (curve_it2 != path_it->end_default())
525 {
526 /* Put marker between curve_it1 and curve_it2.
527 * Loop to end_default (so including closing segment), because when a path is closed,
528 * there should be a midpoint marker between last segment and closing straight line segment */
530 SPMarker* marker = SP_MARKER (shape->marker[SP_MARKER_LOC_MID]);
531 SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[SP_MARKER_LOC_MID]));
533 NR::Matrix tr(from_2geom(sp_shape_marker_get_transform(*curve_it1, *curve_it2)));
535 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
536 tr = NR::scale(style->stroke_width.computed) * tr;
537 }
539 // total marker transform
540 tr = marker_item->transform * marker->c2p * tr * transform;
542 // get bbox of the marker with that transform
543 NRRect marker_bbox;
544 sp_item_invoke_bbox (marker_item, &marker_bbox, tr, true);
545 // union it with the shape bbox
546 nr_rect_d_union (&cbbox, &cbbox, &marker_bbox);
548 ++curve_it1;
549 ++curve_it2;
550 }
551 }
553 if ( shape->marker[SP_MARKER_LOC_END] ) {
554 SPMarker* marker = SP_MARKER (shape->marker[SP_MARKER_LOC_END]);
555 SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[SP_MARKER_LOC_END]));
557 NR::Matrix tr(from_2geom(sp_shape_marker_get_transform_at_end(path_it->back_default())));
559 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
560 tr = NR::scale(style->stroke_width.computed) * tr;
561 }
563 // total marker transform
564 tr = marker_item->transform * marker->c2p * tr * transform;
566 // get bbox of the marker with that transform
567 NRRect marker_bbox;
568 sp_item_invoke_bbox (marker_item, &marker_bbox, tr, true);
569 // union it with the shape bbox
570 nr_rect_d_union (&cbbox, &cbbox, &marker_bbox);
571 }
572 }
573 }
574 }
576 // copy our bbox to the variable we're given
577 *bbox = cbbox;
578 }
579 }
581 /**
582 * Prepares shape for printing. Handles printing of comments for printing
583 * debugging, sizes the item to fit into the document width/height,
584 * applies print fill/stroke, sets transforms for markers, and adds
585 * comment labels.
586 */
587 void
588 sp_shape_print (SPItem *item, SPPrintContext *ctx)
589 {
590 NRRect pbox, dbox, bbox;
592 SPShape *shape = SP_SHAPE(item);
594 if (!shape->curve) return;
596 gint add_comments = prefs_get_int_attribute_limited ("printing.debug", "add-label-comments", 0, 0, 1);
597 if (add_comments) {
598 gchar * comment = g_strdup_printf("begin '%s'",
599 SP_OBJECT(item)->defaultLabel());
600 sp_print_comment(ctx, comment);
601 g_free(comment);
602 }
604 /* fixme: Think (Lauris) */
605 sp_item_invoke_bbox(item, &pbox, NR::identity(), TRUE);
606 dbox.x0 = 0.0;
607 dbox.y0 = 0.0;
608 dbox.x1 = sp_document_width (SP_OBJECT_DOCUMENT (item));
609 dbox.y1 = sp_document_height (SP_OBJECT_DOCUMENT (item));
610 sp_item_bbox_desktop (item, &bbox);
611 NR::Matrix const i2d = from_2geom(sp_item_i2d_affine(item));
613 SPStyle* style = SP_OBJECT_STYLE (item);
615 if (!style->fill.isNone()) {
616 sp_print_fill (ctx, shape->curve->get_pathvector(), &i2d, style, &pbox, &dbox, &bbox);
617 }
619 if (!style->stroke.isNone()) {
620 sp_print_stroke (ctx, shape->curve->get_pathvector(), &i2d, style, &pbox, &dbox, &bbox);
621 }
623 /* TODO: make code prettier: lots of variables can be taken out of the loop! */
624 Geom::PathVector const & pathv = shape->curve->get_pathvector();
625 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
626 if ( shape->marker[SP_MARKER_LOC_START] ) {
627 SPMarker* marker = SP_MARKER (shape->marker[SP_MARKER_LOC_START]);
628 SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[SP_MARKER_LOC_START]));
630 NR::Matrix tr(from_2geom(sp_shape_marker_get_transform_at_start(path_it->front())));
632 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
633 tr = NR::scale(style->stroke_width.computed) * tr;
634 }
636 tr = marker_item->transform * marker->c2p * tr;
638 NR::Matrix old_tr = marker_item->transform;
639 marker_item->transform = tr;
640 sp_item_invoke_print (marker_item, ctx);
641 marker_item->transform = old_tr;
642 }
644 if ( shape->marker[SP_MARKER_LOC_MID] ) {
645 Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
646 Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
647 while (curve_it2 != path_it->end_default())
648 {
649 /* Put marker between curve_it1 and curve_it2.
650 * Loop to end_default (so including closing segment), because when a path is closed,
651 * there should be a midpoint marker between last segment and closing straight line segment */
653 SPMarker* marker = SP_MARKER (shape->marker[SP_MARKER_LOC_MID]);
654 SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[SP_MARKER_LOC_MID]));
656 NR::Matrix tr(from_2geom(sp_shape_marker_get_transform(*curve_it1, *curve_it2)));
658 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
659 tr = NR::scale(style->stroke_width.computed) * tr;
660 }
662 tr = marker_item->transform * marker->c2p * tr;
664 NR::Matrix old_tr = marker_item->transform;
665 marker_item->transform = tr;
666 sp_item_invoke_print (marker_item, ctx);
667 marker_item->transform = old_tr;
669 ++curve_it1;
670 ++curve_it2;
671 }
672 }
674 if ( shape->marker[SP_MARKER_LOC_END] ) {
675 SPMarker* marker = SP_MARKER (shape->marker[SP_MARKER_LOC_END]);
676 SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[SP_MARKER_LOC_END]));
678 NR::Matrix tr(from_2geom(sp_shape_marker_get_transform_at_end(path_it->back_default())));
680 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
681 tr = NR::scale(style->stroke_width.computed) * tr;
682 }
684 tr = marker_item->transform * marker->c2p * tr;
686 NR::Matrix old_tr = marker_item->transform;
687 marker_item->transform = tr;
688 sp_item_invoke_print (marker_item, ctx);
689 marker_item->transform = old_tr;
690 }
691 }
693 if (add_comments) {
694 gchar * comment = g_strdup_printf("end '%s'",
695 SP_OBJECT(item)->defaultLabel());
696 sp_print_comment(ctx, comment);
697 g_free(comment);
698 }
699 }
701 /**
702 * Sets style, path, and paintbox. Updates marker views, including dimensions.
703 */
704 static NRArenaItem *
705 sp_shape_show (SPItem *item, NRArena *arena, unsigned int /*key*/, unsigned int /*flags*/)
706 {
707 SPObject *object = SP_OBJECT(item);
708 SPShape *shape = SP_SHAPE(item);
710 NRArenaItem *arenaitem = NRArenaShape::create(arena);
711 NRArenaShape * const s = NR_ARENA_SHAPE(arenaitem);
712 nr_arena_shape_set_style(s, object->style);
713 nr_arena_shape_set_path(s, shape->curve, false);
714 NR::Maybe<NR::Rect> paintbox = item->getBounds(NR::identity());
715 if (paintbox) {
716 s->setPaintBox(*paintbox);
717 }
719 if (sp_shape_has_markers (shape)) {
721 /* Dimension the marker views */
722 if (!arenaitem->key) {
723 NR_ARENA_ITEM_SET_KEY (arenaitem, sp_item_display_key_new (SP_MARKER_LOC_QTY));
724 }
726 for (int i = 0; i < SP_MARKER_LOC_QTY; i++) {
727 if (shape->marker[i]) {
728 sp_marker_show_dimension ((SPMarker *) shape->marker[i],
729 NR_ARENA_ITEM_GET_KEY (arenaitem) + i - SP_MARKER_LOC,
730 sp_shape_number_of_markers (shape, i));
731 }
732 }
735 /* Update marker views */
736 sp_shape_update_marker_view (shape, arenaitem);
737 }
739 return arenaitem;
740 }
742 /**
743 * Hides/removes marker views from the shape.
744 */
745 static void
746 sp_shape_hide (SPItem *item, unsigned int key)
747 {
748 SPShape *shape;
749 SPItemView *v;
750 int i;
752 shape = (SPShape *) item;
754 for (i=0; i<SP_MARKER_LOC_QTY; i++) {
755 if (shape->marker[i]) {
756 for (v = item->display; v != NULL; v = v->next) {
757 if (key == v->key) {
758 sp_marker_hide ((SPMarker *) shape->marker[i],
759 NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i);
760 }
761 }
762 }
763 }
765 if (((SPItemClass *) parent_class)->hide) {
766 ((SPItemClass *) parent_class)->hide (item, key);
767 }
768 }
770 /**
771 * \param shape Shape.
772 * \return TRUE if the shape has any markers, or FALSE if not.
773 */
774 int
775 sp_shape_has_markers (SPShape const *shape)
776 {
777 /* Note, we're ignoring 'marker' settings, which technically should apply for
778 all three settings. This should be fixed later such that if 'marker' is
779 specified, then all three should appear. */
781 return (
782 shape->curve &&
783 (shape->marker[SP_MARKER_LOC_START] ||
784 shape->marker[SP_MARKER_LOC_MID] ||
785 shape->marker[SP_MARKER_LOC_END])
786 );
787 }
790 /**
791 * \param shape Shape.
792 * \param type Marker type (e.g. SP_MARKER_LOC_START)
793 * \return Number of markers that the shape has of this type.
794 */
795 int
796 sp_shape_number_of_markers (SPShape *shape, int type)
797 {
798 Geom::PathVector const & pathv = shape->curve->get_pathvector();
800 switch(type) {
801 case SP_MARKER_LOC_START:
802 return shape->marker[SP_MARKER_LOC_START] ? pathv.size() : 0;
804 case SP_MARKER_LOC_MID:
805 {
806 if ( shape->marker[SP_MARKER_LOC_MID] ) {
807 guint n = 0;
808 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
809 n += path_it->size();
810 n += path_it->closed() ? 1 : 0;
811 }
812 return n;
813 } else {
814 return 0;
815 }
816 }
818 case SP_MARKER_LOC_END:
819 {
820 if ( shape->marker[SP_MARKER_LOC_END] ) {
821 guint n = 0;
822 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
823 if (!path_it->empty()) {
824 n++;
825 }
826 }
827 return n;
828 } else {
829 return 0;
830 }
831 }
833 default:
834 return 0;
835 }
836 }
838 /**
839 * Checks if the given marker is used in the shape, and if so, it
840 * releases it by calling sp_marker_hide. Also detaches signals
841 * and unrefs the marker from the shape.
842 */
843 static void
844 sp_shape_marker_release (SPObject *marker, SPShape *shape)
845 {
846 SPItem *item;
847 int i;
849 item = (SPItem *) shape;
851 for (i = SP_MARKER_LOC_START; i < SP_MARKER_LOC_QTY; i++) {
852 if (marker == shape->marker[i]) {
853 SPItemView *v;
854 /* Hide marker */
855 for (v = item->display; v != NULL; v = v->next) {
856 sp_marker_hide ((SPMarker *) (shape->marker[i]), NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i);
857 /* fixme: Do we need explicit remove here? (Lauris) */
858 /* nr_arena_item_set_mask (v->arenaitem, NULL); */
859 }
860 /* Detach marker */
861 sp_signal_disconnect_by_data (shape->marker[i], item);
862 shape->marker[i] = sp_object_hunref (shape->marker[i], item);
863 }
864 }
865 }
867 /**
868 * No-op. Exists for handling 'modified' messages
869 */
870 static void
871 sp_shape_marker_modified (SPObject */*marker*/, guint /*flags*/, SPItem */*item*/)
872 {
873 /* I think mask does update automagically */
874 /* g_warning ("Item %s mask %s modified", SP_OBJECT_ID (item), SP_OBJECT_ID (mask)); */
875 }
877 /**
878 * Adds a new marker to shape object at the location indicated by key. value
879 * must be a valid URI reference resolvable from the shape object (i.e., present
880 * in the document <defs>). If the shape object already has a marker
881 * registered at the given position, it is removed first. Then the
882 * new marker is hrefed and its signals connected.
883 */
884 void
885 sp_shape_set_marker (SPObject *object, unsigned int key, const gchar *value)
886 {
887 SPItem *item = (SPItem *) object;
888 SPShape *shape = (SPShape *) object;
890 if (key < SP_MARKER_LOC_START || key > SP_MARKER_LOC_END) {
891 return;
892 }
894 SPObject *mrk = sp_css_uri_reference_resolve (SP_OBJECT_DOCUMENT (object), value);
895 if (mrk != shape->marker[key]) {
896 if (shape->marker[key]) {
897 SPItemView *v;
899 /* Detach marker */
900 shape->release_connect[key].disconnect();
901 shape->modified_connect[key].disconnect();
903 /* Hide marker */
904 for (v = item->display; v != NULL; v = v->next) {
905 sp_marker_hide ((SPMarker *) (shape->marker[key]),
906 NR_ARENA_ITEM_GET_KEY (v->arenaitem) + key);
907 /* fixme: Do we need explicit remove here? (Lauris) */
908 /* nr_arena_item_set_mask (v->arenaitem, NULL); */
909 }
911 /* Unref marker */
912 shape->marker[key] = sp_object_hunref (shape->marker[key], object);
913 }
914 if (SP_IS_MARKER (mrk)) {
915 shape->marker[key] = sp_object_href (mrk, object);
916 shape->release_connect[key] = mrk->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_shape_marker_release), shape));
917 shape->modified_connect[key] = mrk->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_shape_marker_modified), shape));
918 }
919 }
920 }
924 /* Shape section */
926 /**
927 * Calls any registered handlers for the set_shape action
928 */
929 void
930 sp_shape_set_shape (SPShape *shape)
931 {
932 g_return_if_fail (shape != NULL);
933 g_return_if_fail (SP_IS_SHAPE (shape));
935 if (SP_SHAPE_CLASS (G_OBJECT_GET_CLASS (shape))->set_shape) {
936 SP_SHAPE_CLASS (G_OBJECT_GET_CLASS (shape))->set_shape (shape);
937 }
938 }
940 /**
941 * Adds a curve to the shape. If owner is specified, a reference
942 * will be made, otherwise the curve will be copied into the shape.
943 * Any existing curve in the shape will be unreferenced first.
944 * This routine also triggers a request to update the display.
945 */
946 void
947 sp_shape_set_curve (SPShape *shape, SPCurve *curve, unsigned int owner)
948 {
949 if (shape->curve) {
950 shape->curve = shape->curve->unref();
951 }
952 if (curve) {
953 if (owner) {
954 shape->curve = curve->ref();
955 } else {
956 shape->curve = curve->copy();
957 }
958 }
959 SP_OBJECT(shape)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
960 }
962 /**
963 * Return duplicate of curve (if any exists) or NULL if there is no curve
964 */
965 SPCurve *
966 sp_shape_get_curve (SPShape *shape)
967 {
968 if (shape->curve) {
969 return shape->curve->copy();
970 }
971 return NULL;
972 }
974 /**
975 * Same as sp_shape_set_curve but without updating the display
976 */
977 void
978 sp_shape_set_curve_insync (SPShape *shape, SPCurve *curve, unsigned int owner)
979 {
980 if (shape->curve) {
981 shape->curve = shape->curve->unref();
982 }
983 if (curve) {
984 if (owner) {
985 shape->curve = curve->ref();
986 } else {
987 shape->curve = curve->copy();
988 }
989 }
990 }
992 /**
993 * Return all nodes in a path that are to be considered for snapping
994 */
995 static void sp_shape_snappoints(SPItem const *item, SnapPointsIter p)
996 {
997 g_assert(item != NULL);
998 g_assert(SP_IS_SHAPE(item));
1000 SPShape const *shape = SP_SHAPE(item);
1001 if (shape->curve == NULL) {
1002 return;
1003 }
1005 Geom::PathVector const &pathv = shape->curve->get_pathvector();
1006 if (pathv.empty())
1007 return;
1009 Geom::Matrix const i2d (sp_item_i2d_affine (item));
1011 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
1012 *p = from_2geom(path_it->initialPoint() * i2d);
1014 Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
1015 Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
1016 while (curve_it2 != path_it->end_closed())
1017 {
1018 /* Test whether to add the node between curve_it1 and curve_it2.
1019 * Loop to end_closed (so always including closing segment), the last node to be added
1020 * is the node between the closing segment and the segment before that one. Regardless
1021 * of the path being closed. If the path is closed, the final point was already added by
1022 * adding the initial point. */
1024 Geom::NodeType nodetype = Geom::get_nodetype(*curve_it1, *curve_it2);
1026 // Only add cusp nodes. TODO: Shouldn't this be a preference instead?
1027 if (nodetype == Geom::NODE_NONE) {
1028 *p = from_2geom(curve_it1->finalPoint() * i2d);
1029 }
1030 if (nodetype == Geom::NODE_CUSP) {
1031 *p = from_2geom(curve_it1->finalPoint() * i2d);
1032 }
1034 ++curve_it1;
1035 ++curve_it2;
1036 }
1037 }
1038 }
1040 /*
1041 Local Variables:
1042 mode:c++
1043 c-file-style:"stroustrup"
1044 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1045 indent-tabs-mode:nil
1046 fill-column:99
1047 End:
1048 */
1049 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :