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, Geom::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 boost::optional<Geom::Rect> paintbox = SP_ITEM(object)->getBounds(Geom::identity(), SPItem::GEOMETRIC_BBOX);
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)) {
288 /* Dimension marker views */
289 for (SPItemView *v = item->display; v != NULL; v = v->next) {
291 for (int i = 0 ; i < SP_MARKER_LOC_QTY ; i++) {
292 if (shape->marker[i]) {
293 sp_marker_show_dimension ((SPMarker *) shape->marker[i],
294 NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i - SP_MARKER_LOC,
295 sp_shape_number_of_markers (shape, i));
296 }
297 }
298 }
300 /* Update marker views */
301 for (SPItemView *v = item->display; v != NULL; v = v->next) {
302 sp_shape_update_marker_view (shape, v->arenaitem);
303 }
304 }
305 }
307 /**
308 * Calculate the transform required to get a marker's path object in the
309 * right place for particular path segment on a shape.
310 *
311 * \see sp_shape_marker_update_marker_view.
312 *
313 * From SVG spec:
314 * The axes of the temporary new user coordinate system are aligned according to the orient attribute on the 'marker'
315 * element and the slope of the curve at the given vertex. (Note: if there is a discontinuity at a vertex, the slope
316 * is the average of the slopes of the two segments of the curve that join at the given vertex. If a slope cannot be
317 * determined, the slope is assumed to be zero.)
318 *
319 * Reference: http://www.w3.org/TR/SVG11/painting.html#MarkerElement, the `orient' attribute.
320 * Reference for behaviour of zero-length segments:
321 * http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes
322 */
323 Geom::Matrix
324 sp_shape_marker_get_transform(Geom::Curve const & c1, Geom::Curve const & c2)
325 {
326 Geom::Point p = c1.pointAt(1);
327 Geom::Curve * c1_reverse = c1.reverse();
328 Geom::Point tang1 = - c1_reverse->unitTangentAt(0);
329 delete c1_reverse;
330 Geom::Point tang2 = c2.unitTangentAt(0);
332 double const angle1 = Geom::atan2(tang1);
333 double const angle2 = Geom::atan2(tang2);
335 double ret_angle;
336 ret_angle = .5 * (angle1 + angle2);
338 if ( fabs( angle2 - angle1 ) > M_PI ) {
339 /* ret_angle is in the middle of the larger of the two sectors between angle1 and
340 * angle2, so flip it by 180degrees to force it to the middle of the smaller sector.
341 *
342 * (Imagine a circle with rays drawn at angle1 and angle2 from the centre of the
343 * circle. Those two rays divide the circle into two sectors.)
344 */
345 ret_angle += M_PI;
346 }
348 return Geom::Rotate(ret_angle) * Geom::Translate(p);
349 }
350 Geom::Matrix
351 sp_shape_marker_get_transform_at_start(Geom::Curve const & c)
352 {
353 Geom::Point p = c.pointAt(0);
354 Geom::Matrix ret = Geom::Translate(p);
356 if ( !c.isDegenerate() ) {
357 Geom::Point tang = c.unitTangentAt(0);
358 double const angle = Geom::atan2(tang);
359 ret = Geom::Rotate(angle) * Geom::Translate(p);
360 } else {
361 /* FIXME: the svg spec says to search for a better alternative than zero angle directionality:
362 * http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes */
363 }
365 return ret;
366 }
367 Geom::Matrix
368 sp_shape_marker_get_transform_at_end(Geom::Curve const & c)
369 {
370 Geom::Point p = c.pointAt(1);
371 Geom::Matrix ret = Geom::Translate(p);
373 if ( !c.isDegenerate() ) {
374 Geom::Curve * c_reverse = c.reverse();
375 Geom::Point tang = - c_reverse->unitTangentAt(0);
376 delete c_reverse;
377 double const angle = Geom::atan2(tang);
378 ret = Geom::Rotate(angle) * Geom::Translate(p);
379 } else {
380 /* FIXME: the svg spec says to search for a better alternative than zero angle directionality:
381 * http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes */
382 }
384 return ret;
385 }
387 /**
388 * Updates the instances (views) of a given marker in a shape.
389 * Marker views have to be scaled already. The transformation
390 * is retrieved and then shown by calling sp_marker_show_instance.
391 *
392 * TODO: correctly handle the 'marker' attribute.
393 * "Using the marker property from a style sheet is equivalent to using all three (start, mid, end)."
394 * See painting-marker-03-f.svg in SVG 1.1 Full test suite.
395 */
396 static void
397 sp_shape_update_marker_view (SPShape *shape, NRArenaItem *ai)
398 {
399 SPStyle *style = ((SPObject *) shape)->style;
401 // position arguments to sp_marker_show_instance, basically counts the amount of markers.
402 int start_pos = 0;
403 int mid_pos = 0;
404 int end_pos = 0;
406 Geom::PathVector const & pathv = shape->curve->get_pathvector();
407 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
408 if ( shape->marker[SP_MARKER_LOC_START] ) {
409 Geom::Matrix const m (sp_shape_marker_get_transform_at_start(path_it->front()));
410 sp_marker_show_instance ((SPMarker* ) shape->marker[SP_MARKER_LOC_START], ai,
411 NR_ARENA_ITEM_GET_KEY(ai) + SP_MARKER_LOC_START, start_pos, m,
412 style->stroke_width.computed);
413 start_pos++;
414 }
416 if ( shape->marker[SP_MARKER_LOC_MID] && (path_it->size_default() > 1) ) {
417 Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
418 Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
419 while (curve_it2 != path_it->end_default())
420 {
421 /* Put marker between curve_it1 and curve_it2.
422 * Loop to end_default (so including closing segment), because when a path is closed,
423 * there should be a midpoint marker between last segment and closing straight line segment
424 */
425 Geom::Matrix const m (sp_shape_marker_get_transform(*curve_it1, *curve_it2));
426 sp_marker_show_instance ((SPMarker* ) shape->marker[SP_MARKER_LOC_MID], ai,
427 NR_ARENA_ITEM_GET_KEY(ai) + SP_MARKER_LOC_MID, mid_pos, m,
428 style->stroke_width.computed);
429 mid_pos++;
431 ++curve_it1;
432 ++curve_it2;
433 }
434 }
436 if ( shape->marker[SP_MARKER_LOC_END] ) {
437 /* Get reference to last curve in the path.
438 * For moveto-only path, this returns the "closing line segment". */
439 unsigned int index = path_it->size_default();
440 if (index > 0) {
441 index--;
442 }
443 Geom::Curve const &lastcurve = (*path_it)[index];
445 Geom::Matrix const m = sp_shape_marker_get_transform_at_end(lastcurve);
446 sp_marker_show_instance ((SPMarker* ) shape->marker[SP_MARKER_LOC_END], ai,
447 NR_ARENA_ITEM_GET_KEY(ai) + SP_MARKER_LOC_END, end_pos, m,
448 style->stroke_width.computed);
449 end_pos++;
450 }
451 }
452 }
454 /**
455 * Sets modified flag for all sub-item views.
456 */
457 static void
458 sp_shape_modified (SPObject *object, unsigned int flags)
459 {
460 SPShape *shape = SP_SHAPE (object);
462 if (((SPObjectClass *) (parent_class))->modified) {
463 (* ((SPObjectClass *) (parent_class))->modified) (object, flags);
464 }
466 if (flags & SP_OBJECT_STYLE_MODIFIED_FLAG) {
467 for (SPItemView *v = SP_ITEM (shape)->display; v != NULL; v = v->next) {
468 nr_arena_shape_set_style (NR_ARENA_SHAPE (v->arenaitem), object->style);
469 }
470 }
471 }
473 /**
474 * Calculates the bounding box for item, storing it into bbox.
475 * This also includes the bounding boxes of any markers included in the shape.
476 */
477 static void sp_shape_bbox(SPItem const *item, NRRect *bbox, Geom::Matrix const &transform, unsigned const flags)
478 {
479 SPShape const *shape = SP_SHAPE (item);
481 if (shape->curve) {
483 NRRect cbbox;
485 Geom::Rect geombbox = bounds_exact_transformed(shape->curve->get_pathvector(), transform);
486 cbbox.x0 = geombbox[0][0];
487 cbbox.y0 = geombbox[1][0];
488 cbbox.x1 = geombbox[0][1];
489 cbbox.y1 = geombbox[1][1];
491 if ((SPItem::BBoxType) flags != SPItem::GEOMETRIC_BBOX) {
493 SPStyle* style=SP_OBJECT_STYLE (item);
494 if (!style->stroke.isNone()) {
495 double const scale = transform.descrim();
496 if ( fabs(style->stroke_width.computed * scale) > 0.01 ) { // sinon c'est 0=oon veut pas de bord
497 double const width = MAX(0.125, style->stroke_width.computed * scale);
498 if ( fabs(cbbox.x1-cbbox.x0) > -0.00001 && fabs(cbbox.y1-cbbox.y0) > -0.00001 ) {
499 cbbox.x0-=0.5*width;
500 cbbox.x1+=0.5*width;
501 cbbox.y0-=0.5*width;
502 cbbox.y1+=0.5*width;
503 }
504 }
505 }
507 // Union with bboxes of the markers, if any
508 if (sp_shape_has_markers (shape)) {
509 /* TODO: make code prettier: lots of variables can be taken out of the loop! */
510 Geom::PathVector const & pathv = shape->curve->get_pathvector();
511 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
512 if ( shape->marker[SP_MARKER_LOC_START] ) {
513 SPMarker* marker = SP_MARKER (shape->marker[SP_MARKER_LOC_START]);
514 SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[SP_MARKER_LOC_START]));
516 Geom::Matrix tr(sp_shape_marker_get_transform_at_start(path_it->front()));
518 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
519 tr = Geom::Scale(style->stroke_width.computed) * tr;
520 }
522 // total marker transform
523 tr = marker_item->transform * marker->c2p * tr * transform;
525 // get bbox of the marker with that transform
526 NRRect marker_bbox;
527 sp_item_invoke_bbox (marker_item, &marker_bbox, from_2geom(tr), true);
528 // union it with the shape bbox
529 nr_rect_d_union (&cbbox, &cbbox, &marker_bbox);
530 }
532 if ( shape->marker[SP_MARKER_LOC_MID] && (path_it->size_default() > 1) ) {
533 Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
534 Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
535 while (curve_it2 != path_it->end_default())
536 {
537 /* Put marker between curve_it1 and curve_it2.
538 * Loop to end_default (so including closing segment), because when a path is closed,
539 * there should be a midpoint marker between last segment and closing straight line segment */
541 SPMarker* marker = SP_MARKER (shape->marker[SP_MARKER_LOC_MID]);
542 SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[SP_MARKER_LOC_MID]));
544 Geom::Matrix tr(sp_shape_marker_get_transform(*curve_it1, *curve_it2));
546 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
547 tr = Geom::Scale(style->stroke_width.computed) * tr;
548 }
550 // total marker transform
551 tr = marker_item->transform * marker->c2p * tr * transform;
553 // get bbox of the marker with that transform
554 NRRect marker_bbox;
555 sp_item_invoke_bbox (marker_item, &marker_bbox, from_2geom(tr), true);
556 // union it with the shape bbox
557 nr_rect_d_union (&cbbox, &cbbox, &marker_bbox);
559 ++curve_it1;
560 ++curve_it2;
561 }
562 }
564 if ( shape->marker[SP_MARKER_LOC_END] ) {
565 SPMarker* marker = SP_MARKER (shape->marker[SP_MARKER_LOC_END]);
566 SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[SP_MARKER_LOC_END]));
568 /* Get reference to last curve in the path.
569 * For moveto-only path, this returns the "closing line segment". */
570 unsigned int index = path_it->size_default();
571 if (index > 0) {
572 index--;
573 }
574 Geom::Curve const &lastcurve = (*path_it)[index];
576 Geom::Matrix tr = sp_shape_marker_get_transform_at_end(lastcurve);
578 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
579 tr = Geom::Scale(style->stroke_width.computed) * tr;
580 }
582 // total marker transform
583 tr = marker_item->transform * marker->c2p * tr * transform;
585 // get bbox of the marker with that transform
586 NRRect marker_bbox;
587 sp_item_invoke_bbox (marker_item, &marker_bbox, tr, true);
588 // union it with the shape bbox
589 nr_rect_d_union (&cbbox, &cbbox, &marker_bbox);
590 }
591 }
592 }
593 }
595 // copy our bbox to the variable we're given
596 *bbox = cbbox;
597 }
598 }
600 /**
601 * Prepares shape for printing. Handles printing of comments for printing
602 * debugging, sizes the item to fit into the document width/height,
603 * applies print fill/stroke, sets transforms for markers, and adds
604 * comment labels.
605 */
606 void
607 sp_shape_print (SPItem *item, SPPrintContext *ctx)
608 {
609 NRRect pbox, dbox, bbox;
611 SPShape *shape = SP_SHAPE(item);
613 if (!shape->curve) return;
615 gint add_comments = prefs_get_int_attribute_limited ("printing.debug", "add-label-comments", 0, 0, 1);
616 if (add_comments) {
617 gchar * comment = g_strdup_printf("begin '%s'",
618 SP_OBJECT(item)->defaultLabel());
619 sp_print_comment(ctx, comment);
620 g_free(comment);
621 }
623 /* fixme: Think (Lauris) */
624 sp_item_invoke_bbox(item, &pbox, NR::identity(), TRUE);
625 dbox.x0 = 0.0;
626 dbox.y0 = 0.0;
627 dbox.x1 = sp_document_width (SP_OBJECT_DOCUMENT (item));
628 dbox.y1 = sp_document_height (SP_OBJECT_DOCUMENT (item));
629 sp_item_bbox_desktop (item, &bbox);
630 Geom::Matrix const i2d(sp_item_i2d_affine(item));
632 SPStyle* style = SP_OBJECT_STYLE (item);
634 if (!style->fill.isNone()) {
635 sp_print_fill (ctx, shape->curve->get_pathvector(), &i2d, style, &pbox, &dbox, &bbox);
636 }
638 if (!style->stroke.isNone()) {
639 sp_print_stroke (ctx, shape->curve->get_pathvector(), &i2d, style, &pbox, &dbox, &bbox);
640 }
642 /* TODO: make code prettier: lots of variables can be taken out of the loop! */
643 Geom::PathVector const & pathv = shape->curve->get_pathvector();
644 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
645 if ( shape->marker[SP_MARKER_LOC_START] ) {
646 SPMarker* marker = SP_MARKER (shape->marker[SP_MARKER_LOC_START]);
647 SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[SP_MARKER_LOC_START]));
649 Geom::Matrix tr(sp_shape_marker_get_transform_at_start(path_it->front()));
651 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
652 tr = Geom::Scale(style->stroke_width.computed) * tr;
653 }
655 tr = marker_item->transform * marker->c2p * tr;
657 NR::Matrix old_tr = marker_item->transform;
658 marker_item->transform = tr;
659 sp_item_invoke_print (marker_item, ctx);
660 marker_item->transform = old_tr;
661 }
663 if ( shape->marker[SP_MARKER_LOC_MID] && (path_it->size_default() > 1) ) {
664 Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
665 Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
666 while (curve_it2 != path_it->end_default())
667 {
668 /* Put marker between curve_it1 and curve_it2.
669 * Loop to end_default (so including closing segment), because when a path is closed,
670 * there should be a midpoint marker between last segment and closing straight line segment */
672 SPMarker* marker = SP_MARKER (shape->marker[SP_MARKER_LOC_MID]);
673 SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[SP_MARKER_LOC_MID]));
675 Geom::Matrix tr(sp_shape_marker_get_transform(*curve_it1, *curve_it2));
677 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
678 tr = Geom::Scale(style->stroke_width.computed) * tr;
679 }
681 tr = marker_item->transform * marker->c2p * tr;
683 NR::Matrix old_tr = marker_item->transform;
684 marker_item->transform = tr;
685 sp_item_invoke_print (marker_item, ctx);
686 marker_item->transform = old_tr;
688 ++curve_it1;
689 ++curve_it2;
690 }
691 }
693 if ( shape->marker[SP_MARKER_LOC_END] ) {
694 SPMarker* marker = SP_MARKER (shape->marker[SP_MARKER_LOC_END]);
695 SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[SP_MARKER_LOC_END]));
697 /* Get reference to last curve in the path.
698 * For moveto-only path, this returns the "closing line segment". */
699 unsigned int index = path_it->size_default();
700 if (index > 0) {
701 index--;
702 }
703 Geom::Curve const &lastcurve = (*path_it)[index];
705 Geom::Matrix tr = sp_shape_marker_get_transform_at_end(lastcurve);
707 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
708 tr = Geom::Scale(style->stroke_width.computed) * tr;
709 }
711 tr = marker_item->transform * marker->c2p * tr;
713 NR::Matrix old_tr = marker_item->transform;
714 marker_item->transform = tr;
715 sp_item_invoke_print (marker_item, ctx);
716 marker_item->transform = old_tr;
717 }
718 }
720 if (add_comments) {
721 gchar * comment = g_strdup_printf("end '%s'",
722 SP_OBJECT(item)->defaultLabel());
723 sp_print_comment(ctx, comment);
724 g_free(comment);
725 }
726 }
728 /**
729 * Sets style, path, and paintbox. Updates marker views, including dimensions.
730 */
731 static NRArenaItem *
732 sp_shape_show (SPItem *item, NRArena *arena, unsigned int /*key*/, unsigned int /*flags*/)
733 {
734 SPObject *object = SP_OBJECT(item);
735 SPShape *shape = SP_SHAPE(item);
737 NRArenaItem *arenaitem = NRArenaShape::create(arena);
738 NRArenaShape * const s = NR_ARENA_SHAPE(arenaitem);
739 nr_arena_shape_set_style(s, object->style);
740 nr_arena_shape_set_path(s, shape->curve, false);
741 boost::optional<Geom::Rect> paintbox = item->getBounds(Geom::identity());
742 if (paintbox) {
743 s->setPaintBox(*paintbox);
744 }
746 if (sp_shape_has_markers (shape)) {
748 /* Dimension the marker views */
749 if (!arenaitem->key) {
750 NR_ARENA_ITEM_SET_KEY (arenaitem, sp_item_display_key_new (SP_MARKER_LOC_QTY));
751 }
753 for (int i = 0; i < SP_MARKER_LOC_QTY; i++) {
754 if (shape->marker[i]) {
755 sp_marker_show_dimension ((SPMarker *) shape->marker[i],
756 NR_ARENA_ITEM_GET_KEY (arenaitem) + i - SP_MARKER_LOC,
757 sp_shape_number_of_markers (shape, i));
758 }
759 }
762 /* Update marker views */
763 sp_shape_update_marker_view (shape, arenaitem);
764 }
766 return arenaitem;
767 }
769 /**
770 * Hides/removes marker views from the shape.
771 */
772 static void
773 sp_shape_hide (SPItem *item, unsigned int key)
774 {
775 SPShape *shape;
776 SPItemView *v;
777 int i;
779 shape = (SPShape *) item;
781 for (i=0; i<SP_MARKER_LOC_QTY; i++) {
782 if (shape->marker[i]) {
783 for (v = item->display; v != NULL; v = v->next) {
784 if (key == v->key) {
785 sp_marker_hide ((SPMarker *) shape->marker[i],
786 NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i);
787 }
788 }
789 }
790 }
792 if (((SPItemClass *) parent_class)->hide) {
793 ((SPItemClass *) parent_class)->hide (item, key);
794 }
795 }
797 /**
798 * \param shape Shape.
799 * \return TRUE if the shape has any markers, or FALSE if not.
800 */
801 int
802 sp_shape_has_markers (SPShape const *shape)
803 {
804 /* Note, we're ignoring 'marker' settings, which technically should apply for
805 all three settings. This should be fixed later such that if 'marker' is
806 specified, then all three should appear. */
808 return (
809 shape->curve &&
810 (shape->marker[SP_MARKER_LOC_START] ||
811 shape->marker[SP_MARKER_LOC_MID] ||
812 shape->marker[SP_MARKER_LOC_END])
813 );
814 }
817 /**
818 * \param shape Shape.
819 * \param type Marker type (e.g. SP_MARKER_LOC_START)
820 * \return Number of markers that the shape has of this type.
821 */
822 int
823 sp_shape_number_of_markers (SPShape *shape, int type)
824 {
825 Geom::PathVector const & pathv = shape->curve->get_pathvector();
827 switch(type) {
828 case SP_MARKER_LOC_START:
829 return shape->marker[SP_MARKER_LOC_START] ? pathv.size() : 0;
831 case SP_MARKER_LOC_MID:
832 {
833 if ( shape->marker[SP_MARKER_LOC_MID] ) {
834 guint n = 0;
835 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
836 n += path_it->size();
837 n += path_it->closed() ? 1 : 0;
838 }
839 return n;
840 } else {
841 return 0;
842 }
843 }
845 case SP_MARKER_LOC_END:
846 {
847 if ( shape->marker[SP_MARKER_LOC_END] ) {
848 guint n = 0;
849 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
850 if (!path_it->empty()) {
851 n++;
852 }
853 }
854 return n;
855 } else {
856 return 0;
857 }
858 }
860 default:
861 return 0;
862 }
863 }
865 /**
866 * Checks if the given marker is used in the shape, and if so, it
867 * releases it by calling sp_marker_hide. Also detaches signals
868 * and unrefs the marker from the shape.
869 */
870 static void
871 sp_shape_marker_release (SPObject *marker, SPShape *shape)
872 {
873 SPItem *item;
874 int i;
876 item = (SPItem *) shape;
878 for (i = SP_MARKER_LOC_START; i < SP_MARKER_LOC_QTY; i++) {
879 if (marker == shape->marker[i]) {
880 SPItemView *v;
881 /* Hide marker */
882 for (v = item->display; v != NULL; v = v->next) {
883 sp_marker_hide ((SPMarker *) (shape->marker[i]), NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i);
884 /* fixme: Do we need explicit remove here? (Lauris) */
885 /* nr_arena_item_set_mask (v->arenaitem, NULL); */
886 }
887 /* Detach marker */
888 sp_signal_disconnect_by_data (shape->marker[i], item);
889 shape->marker[i] = sp_object_hunref (shape->marker[i], item);
890 }
891 }
892 }
894 /**
895 * No-op. Exists for handling 'modified' messages
896 */
897 static void
898 sp_shape_marker_modified (SPObject */*marker*/, guint /*flags*/, SPItem */*item*/)
899 {
900 /* I think mask does update automagically */
901 /* g_warning ("Item %s mask %s modified", SP_OBJECT_ID (item), SP_OBJECT_ID (mask)); */
902 }
904 /**
905 * Adds a new marker to shape object at the location indicated by key. value
906 * must be a valid URI reference resolvable from the shape object (i.e., present
907 * in the document <defs>). If the shape object already has a marker
908 * registered at the given position, it is removed first. Then the
909 * new marker is hrefed and its signals connected.
910 */
911 void
912 sp_shape_set_marker (SPObject *object, unsigned int key, const gchar *value)
913 {
914 SPItem *item = (SPItem *) object;
915 SPShape *shape = (SPShape *) object;
917 if (key < SP_MARKER_LOC_START || key > SP_MARKER_LOC_END) {
918 return;
919 }
921 SPObject *mrk = sp_css_uri_reference_resolve (SP_OBJECT_DOCUMENT (object), value);
922 if (mrk != shape->marker[key]) {
923 if (shape->marker[key]) {
924 SPItemView *v;
926 /* Detach marker */
927 shape->release_connect[key].disconnect();
928 shape->modified_connect[key].disconnect();
930 /* Hide marker */
931 for (v = item->display; v != NULL; v = v->next) {
932 sp_marker_hide ((SPMarker *) (shape->marker[key]),
933 NR_ARENA_ITEM_GET_KEY (v->arenaitem) + key);
934 /* fixme: Do we need explicit remove here? (Lauris) */
935 /* nr_arena_item_set_mask (v->arenaitem, NULL); */
936 }
938 /* Unref marker */
939 shape->marker[key] = sp_object_hunref (shape->marker[key], object);
940 }
941 if (SP_IS_MARKER (mrk)) {
942 shape->marker[key] = sp_object_href (mrk, object);
943 shape->release_connect[key] = mrk->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_shape_marker_release), shape));
944 shape->modified_connect[key] = mrk->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_shape_marker_modified), shape));
945 }
946 }
947 }
951 /* Shape section */
953 /**
954 * Calls any registered handlers for the set_shape action
955 */
956 void
957 sp_shape_set_shape (SPShape *shape)
958 {
959 g_return_if_fail (shape != NULL);
960 g_return_if_fail (SP_IS_SHAPE (shape));
962 if (SP_SHAPE_CLASS (G_OBJECT_GET_CLASS (shape))->set_shape) {
963 SP_SHAPE_CLASS (G_OBJECT_GET_CLASS (shape))->set_shape (shape);
964 }
965 }
967 /**
968 * Adds a curve to the shape. If owner is specified, a reference
969 * will be made, otherwise the curve will be copied into the shape.
970 * Any existing curve in the shape will be unreferenced first.
971 * This routine also triggers a request to update the display.
972 */
973 void
974 sp_shape_set_curve (SPShape *shape, SPCurve *curve, unsigned int owner)
975 {
976 if (shape->curve) {
977 shape->curve = shape->curve->unref();
978 }
979 if (curve) {
980 if (owner) {
981 shape->curve = curve->ref();
982 } else {
983 shape->curve = curve->copy();
984 }
985 }
986 SP_OBJECT(shape)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
987 }
989 /**
990 * Return duplicate of curve (if any exists) or NULL if there is no curve
991 */
992 SPCurve *
993 sp_shape_get_curve (SPShape *shape)
994 {
995 if (shape->curve) {
996 return shape->curve->copy();
997 }
998 return NULL;
999 }
1001 /**
1002 * Same as sp_shape_set_curve but without updating the display
1003 */
1004 void
1005 sp_shape_set_curve_insync (SPShape *shape, SPCurve *curve, unsigned int owner)
1006 {
1007 if (shape->curve) {
1008 shape->curve = shape->curve->unref();
1009 }
1010 if (curve) {
1011 if (owner) {
1012 shape->curve = curve->ref();
1013 } else {
1014 shape->curve = curve->copy();
1015 }
1016 }
1017 }
1019 /**
1020 * Return all nodes in a path that are to be considered for snapping
1021 */
1022 static void sp_shape_snappoints(SPItem const *item, SnapPointsIter p)
1023 {
1024 g_assert(item != NULL);
1025 g_assert(SP_IS_SHAPE(item));
1027 SPShape const *shape = SP_SHAPE(item);
1028 if (shape->curve == NULL) {
1029 return;
1030 }
1032 Geom::PathVector const &pathv = shape->curve->get_pathvector();
1033 if (pathv.empty())
1034 return;
1036 Geom::Matrix const i2d (sp_item_i2d_affine (item));
1038 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
1039 *p = from_2geom(path_it->initialPoint() * i2d);
1041 Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
1042 Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
1043 while (curve_it2 != path_it->end_closed())
1044 {
1045 /* Test whether to add the node between curve_it1 and curve_it2.
1046 * Loop to end_closed (so always including closing segment), the last node to be added
1047 * is the node between the closing segment and the segment before that one. Regardless
1048 * of the path being closed. If the path is closed, the final point was already added by
1049 * adding the initial point. */
1051 Geom::NodeType nodetype = Geom::get_nodetype(*curve_it1, *curve_it2);
1053 // Only add cusp nodes. TODO: Shouldn't this be a preference instead?
1054 if (nodetype == Geom::NODE_NONE) {
1055 *p = from_2geom(curve_it1->finalPoint() * i2d);
1056 }
1057 if (nodetype == Geom::NODE_CUSP) {
1058 *p = from_2geom(curve_it1->finalPoint() * i2d);
1059 }
1061 ++curve_it1;
1062 ++curve_it2;
1063 }
1064 }
1065 }
1067 /*
1068 Local Variables:
1069 mode:c++
1070 c-file-style:"stroustrup"
1071 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1072 indent-tabs-mode:nil
1073 fill-column:99
1074 End:
1075 */
1076 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :