1 /** \file
2 * Base class for visual SVG elements
3 */
4 /*
5 * Authors:
6 * Lauris Kaplinski <lauris@kaplinski.com>
7 * bulia byak <buliabyak@users.sf.net>
8 * Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
9 *
10 * Copyright (C) 2001-2006 authors
11 * Copyright (C) 2001 Ximian, Inc.
12 *
13 * Released under GNU GPL, read the file 'COPYING' for more information
14 */
16 /** \class SPItem
17 *
18 * SPItem is an abstract base class for all graphic (visible) SVG nodes. It
19 * is a subclass of SPObject, with great deal of specific functionality.
20 */
22 #ifdef HAVE_CONFIG_H
23 # include "config.h"
24 #endif
27 #include "sp-item.h"
28 #include "svg/svg.h"
29 #include "print.h"
30 #include "display/nr-arena.h"
31 #include "display/nr-arena-item.h"
32 #include "attributes.h"
33 #include "document.h"
34 #include "uri.h"
35 #include "inkscape.h"
36 #include "desktop.h"
37 #include "desktop-handles.h"
39 #include "style.h"
40 #include <glibmm/i18n.h>
41 #include "sp-root.h"
42 #include "sp-clippath.h"
43 #include "sp-mask.h"
44 #include "sp-rect.h"
45 #include "sp-use.h"
46 #include "sp-text.h"
47 #include "sp-item-rm-unsatisfied-cns.h"
48 #include "sp-pattern.h"
49 #include "sp-switch.h"
50 #include "sp-guide-constraint.h"
51 #include "gradient-chemistry.h"
52 #include "preferences.h"
53 #include "conn-avoid-ref.h"
54 #include "conditions.h"
55 #include "sp-filter-reference.h"
56 #include "filter-chemistry.h"
57 #include "sp-guide.h"
58 #include "sp-title.h"
59 #include "sp-desc.h"
61 #include "libnr/nr-matrix-fns.h"
62 #include "libnr/nr-matrix-scale-ops.h"
63 #include "libnr/nr-matrix-translate-ops.h"
64 #include "libnr/nr-scale-translate-ops.h"
65 #include "libnr/nr-translate-scale-ops.h"
66 #include "libnr/nr-convert2geom.h"
67 #include "util/find-last-if.h"
68 #include "util/reverse-list.h"
69 #include <2geom/rect.h>
70 #include <2geom/matrix.h>
71 #include <2geom/transforms.h>
73 #include "xml/repr.h"
74 #include "extract-uri.h"
75 #include "helper/geom.h"
77 #include "live_effects/lpeobject.h"
78 #include "live_effects/effect.h"
79 #include "live_effects/lpeobject-reference.h"
81 #define noSP_ITEM_DEBUG_IDLE
83 static void sp_item_class_init(SPItemClass *klass);
84 static void sp_item_init(SPItem *item);
86 static void sp_item_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
87 static void sp_item_release(SPObject *object);
88 static void sp_item_set(SPObject *object, unsigned key, gchar const *value);
89 static void sp_item_update(SPObject *object, SPCtx *ctx, guint flags);
90 static Inkscape::XML::Node *sp_item_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
92 static gchar *sp_item_private_description(SPItem *item);
93 static void sp_item_private_snappoints(SPItem const *item, std::vector<Inkscape::SnapCandidatePoint> &p, Inkscape::SnapPreferences const *snapprefs);
95 static SPItemView *sp_item_view_new_prepend(SPItemView *list, SPItem *item, unsigned flags, unsigned key, NRArenaItem *arenaitem);
96 static SPItemView *sp_item_view_list_remove(SPItemView *list, SPItemView *view);
98 static SPObjectClass *parent_class;
100 static void clip_ref_changed(SPObject *old_clip, SPObject *clip, SPItem *item);
101 static void mask_ref_changed(SPObject *old_clip, SPObject *clip, SPItem *item);
103 /**
104 * Registers SPItem class and returns its type number.
105 */
106 GType
107 sp_item_get_type(void)
108 {
109 static GType type = 0;
110 if (!type) {
111 GTypeInfo info = {
112 sizeof(SPItemClass),
113 NULL, NULL,
114 (GClassInitFunc) sp_item_class_init,
115 NULL, NULL,
116 sizeof(SPItem),
117 16,
118 (GInstanceInitFunc) sp_item_init,
119 NULL, /* value_table */
120 };
121 type = g_type_register_static(SP_TYPE_OBJECT, "SPItem", &info, (GTypeFlags)0);
122 }
123 return type;
124 }
126 /**
127 * SPItem vtable initialization.
128 */
129 static void
130 sp_item_class_init(SPItemClass *klass)
131 {
132 SPObjectClass *sp_object_class = (SPObjectClass *) klass;
134 parent_class = (SPObjectClass *)g_type_class_ref(SP_TYPE_OBJECT);
136 sp_object_class->build = sp_item_build;
137 sp_object_class->release = sp_item_release;
138 sp_object_class->set = sp_item_set;
139 sp_object_class->update = sp_item_update;
140 sp_object_class->write = sp_item_write;
142 klass->description = sp_item_private_description;
143 klass->snappoints = sp_item_private_snappoints;
144 }
146 /**
147 * Callback for SPItem object initialization.
148 */
149 static void
150 sp_item_init(SPItem *item)
151 {
152 item->init();
153 }
155 void SPItem::init() {
156 this->sensitive = TRUE;
158 this->transform_center_x = 0;
159 this->transform_center_y = 0;
161 this->_is_evaluated = true;
162 this->_evaluated_status = StatusUnknown;
164 this->transform = Geom::identity();
166 this->display = NULL;
168 this->clip_ref = new SPClipPathReference(this);
169 sigc::signal<void, SPObject *, SPObject *> cs1=this->clip_ref->changedSignal();
170 sigc::slot2<void,SPObject*, SPObject *> sl1=sigc::bind(sigc::ptr_fun(clip_ref_changed), this);
171 _clip_ref_connection = cs1.connect(sl1);
173 this->mask_ref = new SPMaskReference(this);
174 sigc::signal<void, SPObject *, SPObject *> cs2=this->mask_ref->changedSignal();
175 sigc::slot2<void,SPObject*, SPObject *> sl2=sigc::bind(sigc::ptr_fun(mask_ref_changed), this);
176 _mask_ref_connection = cs2.connect(sl2);
178 this->avoidRef = new SPAvoidRef(this);
180 new (&this->constraints) std::vector<SPGuideConstraint>();
182 new (&this->_transformed_signal) sigc::signal<void, Geom::Matrix const *, SPItem *>();
183 }
185 bool SPItem::isVisibleAndUnlocked() const {
186 return (!isHidden() && !isLocked());
187 }
189 bool SPItem::isVisibleAndUnlocked(unsigned display_key) const {
190 return (!isHidden(display_key) && !isLocked());
191 }
193 bool SPItem::isLocked() const {
194 for (SPObject const *o = this; o != NULL; o = o->parent) {
195 if (SP_IS_ITEM(o) && !(SP_ITEM(o)->sensitive)) {
196 return true;
197 }
198 }
199 return false;
200 }
202 void SPItem::setLocked(bool locked) {
203 this->repr->setAttribute("sodipodi:insensitive",
204 ( locked ? "1" : NULL ));
205 updateRepr();
206 }
208 bool SPItem::isHidden() const {
209 if (!isEvaluated())
210 return true;
211 return style->display.computed == SP_CSS_DISPLAY_NONE;
212 }
214 void SPItem::setHidden(bool hide) {
215 style->display.set = TRUE;
216 style->display.value = ( hide ? SP_CSS_DISPLAY_NONE : SP_CSS_DISPLAY_INLINE );
217 style->display.computed = style->display.value;
218 style->display.inherit = FALSE;
219 updateRepr();
220 }
222 bool SPItem::isHidden(unsigned display_key) const {
223 if (!isEvaluated())
224 return true;
225 for ( SPItemView *view(display) ; view ; view = view->next ) {
226 if ( view->key == display_key ) {
227 g_assert(view->arenaitem != NULL);
228 for ( NRArenaItem *arenaitem = view->arenaitem ;
229 arenaitem ; arenaitem = arenaitem->parent )
230 {
231 if (!arenaitem->visible) {
232 return true;
233 }
234 }
235 return false;
236 }
237 }
238 return true;
239 }
241 void SPItem::setEvaluated(bool evaluated) {
242 _is_evaluated = evaluated;
243 _evaluated_status = StatusSet;
244 }
246 void SPItem::resetEvaluated() {
247 if ( StatusCalculated == _evaluated_status ) {
248 _evaluated_status = StatusUnknown;
249 bool oldValue = _is_evaluated;
250 if ( oldValue != isEvaluated() ) {
251 requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
252 }
253 } if ( StatusSet == _evaluated_status ) {
254 SPObject const *const parent = this->parent;
255 if (SP_IS_SWITCH(parent)) {
256 SP_SWITCH(parent)->resetChildEvaluated();
257 }
258 }
259 }
261 bool SPItem::isEvaluated() const {
262 if ( StatusUnknown == _evaluated_status ) {
263 _is_evaluated = sp_item_evaluate(this);
264 _evaluated_status = StatusCalculated;
265 }
266 return _is_evaluated;
267 }
269 /**
270 * Returns something suitable for the `Hide' checkbox in the Object Properties dialog box.
271 * Corresponds to setExplicitlyHidden.
272 */
273 bool
274 SPItem::isExplicitlyHidden() const
275 {
276 return (this->style->display.set
277 && this->style->display.value == SP_CSS_DISPLAY_NONE);
278 }
280 /**
281 * Sets the display CSS property to `hidden' if \a val is true,
282 * otherwise makes it unset
283 */
284 void
285 SPItem::setExplicitlyHidden(bool const val) {
286 this->style->display.set = val;
287 this->style->display.value = ( val ? SP_CSS_DISPLAY_NONE : SP_CSS_DISPLAY_INLINE );
288 this->style->display.computed = this->style->display.value;
289 this->updateRepr();
290 }
292 /**
293 * Sets the transform_center_x and transform_center_y properties to retain the rotation centre
294 */
295 void
296 SPItem::setCenter(Geom::Point object_centre) {
297 // for getBounds() to work
298 sp_document_ensure_up_to_date( this->document );
300 Geom::OptRect bbox = getBounds(sp_item_i2d_affine(this));
301 if (bbox) {
302 transform_center_x = object_centre[Geom::X] - bbox->midpoint()[Geom::X];
303 if (fabs(transform_center_x) < 1e-5) // rounding error
304 transform_center_x = 0;
305 transform_center_y = object_centre[Geom::Y] - bbox->midpoint()[Geom::Y];
306 if (fabs(transform_center_y) < 1e-5) // rounding error
307 transform_center_y = 0;
308 }
309 }
311 void
312 SPItem::unsetCenter() {
313 transform_center_x = 0;
314 transform_center_y = 0;
315 }
317 bool SPItem::isCenterSet() {
318 return (transform_center_x != 0 || transform_center_y != 0);
319 }
321 Geom::Point SPItem::getCenter() const {
322 // for getBounds() to work
323 sp_document_ensure_up_to_date( this->document );
325 Geom::OptRect bbox = getBounds(sp_item_i2d_affine(this));
326 if (bbox) {
327 return to_2geom(bbox->midpoint()) + Geom::Point (this->transform_center_x, this->transform_center_y);
328 } else {
329 return Geom::Point (0, 0); // something's wrong!
330 }
331 }
334 namespace {
336 bool is_item(SPObject const &object) {
337 return SP_IS_ITEM(&object);
338 }
340 }
342 void SPItem::raiseToTop() {
343 using Inkscape::Algorithms::find_last_if;
345 SPObject *topmost=find_last_if<SPObject::SiblingIterator>(
346 this->next, NULL, &is_item
347 );
348 if (topmost) {
349 Inkscape::XML::Node *repr = this->repr;
350 sp_repr_parent(repr)->changeOrder( repr, topmost->repr );
351 }
352 }
354 void SPItem::raiseOne() {
355 SPObject *next_higher=std::find_if<SPObject::SiblingIterator>(
356 this->next, NULL, &is_item
357 );
358 if (next_higher) {
359 Inkscape::XML::Node *repr = this->repr;
360 Inkscape::XML::Node *ref = next_higher->repr;
361 sp_repr_parent(repr)->changeOrder(repr, ref);
362 }
363 }
365 void SPItem::lowerOne() {
366 using Inkscape::Util::MutableList;
367 using Inkscape::Util::reverse_list;
369 MutableList<SPObject &> next_lower=std::find_if(
370 reverse_list<SPObject::SiblingIterator>(
371 this->parent->firstChild(), this
372 ),
373 MutableList<SPObject &>(),
374 &is_item
375 );
376 if (next_lower) {
377 ++next_lower;
378 Inkscape::XML::Node *repr = this->repr;
379 Inkscape::XML::Node *ref = ( next_lower ? next_lower->repr : NULL );
380 sp_repr_parent(repr)->changeOrder(repr, ref);
381 }
382 }
384 void SPItem::lowerToBottom() {
385 using Inkscape::Algorithms::find_last_if;
386 using Inkscape::Util::MutableList;
387 using Inkscape::Util::reverse_list;
389 MutableList<SPObject &> bottom=find_last_if(
390 reverse_list<SPObject::SiblingIterator>(
391 this->parent->firstChild(), this
392 ),
393 MutableList<SPObject &>(),
394 &is_item
395 );
396 if (bottom) {
397 ++bottom;
398 Inkscape::XML::Node *repr = this->repr;
399 Inkscape::XML::Node *ref = ( bottom ? bottom->repr : NULL );
400 sp_repr_parent(repr)->changeOrder(repr, ref);
401 }
402 }
404 static void
405 sp_item_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
406 {
407 sp_object_read_attr(object, "style");
408 sp_object_read_attr(object, "transform");
409 sp_object_read_attr(object, "clip-path");
410 sp_object_read_attr(object, "mask");
411 sp_object_read_attr(object, "sodipodi:insensitive");
412 sp_object_read_attr(object, "sodipodi:nonprintable");
413 sp_object_read_attr(object, "inkscape:transform-center-x");
414 sp_object_read_attr(object, "inkscape:transform-center-y");
415 sp_object_read_attr(object, "inkscape:connector-avoid");
416 sp_object_read_attr(object, "inkscape:connection-points");
418 if (((SPObjectClass *) (parent_class))->build) {
419 (* ((SPObjectClass *) (parent_class))->build)(object, document, repr);
420 }
421 }
423 static void
424 sp_item_release(SPObject *object)
425 {
426 SPItem *item = (SPItem *) object;
428 item->_clip_ref_connection.disconnect();
429 item->_mask_ref_connection.disconnect();
431 // Note: do this here before the clip_ref is deleted, since calling
432 // sp_document_ensure_up_to_date for triggered routing may reference
433 // the deleted clip_ref.
434 if (item->avoidRef) {
435 delete item->avoidRef;
436 item->avoidRef = NULL;
437 }
439 if (item->clip_ref) {
440 item->clip_ref->detach();
441 delete item->clip_ref;
442 item->clip_ref = NULL;
443 }
445 if (item->mask_ref) {
446 item->mask_ref->detach();
447 delete item->mask_ref;
448 item->mask_ref = NULL;
449 }
451 if (((SPObjectClass *) (parent_class))->release) {
452 ((SPObjectClass *) parent_class)->release(object);
453 }
455 while (item->display) {
456 nr_arena_item_unparent(item->display->arenaitem);
457 item->display = sp_item_view_list_remove(item->display, item->display);
458 }
460 item->_transformed_signal.~signal();
461 }
463 static void
464 sp_item_set(SPObject *object, unsigned key, gchar const *value)
465 {
466 SPItem *item = (SPItem *) object;
468 switch (key) {
469 case SP_ATTR_TRANSFORM: {
470 Geom::Matrix t;
471 if (value && sp_svg_transform_read(value, &t)) {
472 sp_item_set_item_transform(item, t);
473 } else {
474 sp_item_set_item_transform(item, Geom::identity());
475 }
476 break;
477 }
478 case SP_PROP_CLIP_PATH: {
479 gchar *uri = extract_uri(value);
480 if (uri) {
481 try {
482 item->clip_ref->attach(Inkscape::URI(uri));
483 } catch (Inkscape::BadURIException &e) {
484 g_warning("%s", e.what());
485 item->clip_ref->detach();
486 }
487 g_free(uri);
488 } else {
489 item->clip_ref->detach();
490 }
492 break;
493 }
494 case SP_PROP_MASK: {
495 gchar *uri = extract_uri(value);
496 if (uri) {
497 try {
498 item->mask_ref->attach(Inkscape::URI(uri));
499 } catch (Inkscape::BadURIException &e) {
500 g_warning("%s", e.what());
501 item->mask_ref->detach();
502 }
503 g_free(uri);
504 } else {
505 item->mask_ref->detach();
506 }
508 break;
509 }
510 case SP_ATTR_SODIPODI_INSENSITIVE:
511 item->sensitive = !value;
512 for (SPItemView *v = item->display; v != NULL; v = v->next) {
513 nr_arena_item_set_sensitive(v->arenaitem, item->sensitive);
514 }
515 break;
516 case SP_ATTR_CONNECTOR_AVOID:
517 item->avoidRef->setAvoid(value);
518 break;
519 case SP_ATTR_CONNECTION_POINTS:
520 item->avoidRef->setConnectionPoints(value);
521 break;
522 case SP_ATTR_TRANSFORM_CENTER_X:
523 if (value) {
524 item->transform_center_x = g_strtod(value, NULL);
525 } else {
526 item->transform_center_x = 0;
527 }
528 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
529 break;
530 case SP_ATTR_TRANSFORM_CENTER_Y:
531 if (value) {
532 item->transform_center_y = g_strtod(value, NULL);
533 } else {
534 item->transform_center_y = 0;
535 }
536 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
537 break;
538 case SP_PROP_SYSTEM_LANGUAGE:
539 case SP_PROP_REQUIRED_FEATURES:
540 case SP_PROP_REQUIRED_EXTENSIONS:
541 {
542 item->resetEvaluated();
543 // pass to default handler
544 }
545 default:
546 if (SP_ATTRIBUTE_IS_CSS(key)) {
547 sp_style_read_from_object(object->style, object);
548 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
549 } else {
550 if (((SPObjectClass *) (parent_class))->set) {
551 (* ((SPObjectClass *) (parent_class))->set)(object, key, value);
552 }
553 }
554 break;
555 }
556 }
558 static void
559 clip_ref_changed(SPObject *old_clip, SPObject *clip, SPItem *item)
560 {
561 if (old_clip) {
562 SPItemView *v;
563 /* Hide clippath */
564 for (v = item->display; v != NULL; v = v->next) {
565 sp_clippath_hide(SP_CLIPPATH(old_clip), NR_ARENA_ITEM_GET_KEY(v->arenaitem));
566 nr_arena_item_set_clip(v->arenaitem, NULL);
567 }
568 }
569 if (SP_IS_CLIPPATH(clip)) {
570 NRRect bbox;
571 sp_item_invoke_bbox(item, &bbox, Geom::identity(), TRUE);
572 for (SPItemView *v = item->display; v != NULL; v = v->next) {
573 if (!v->arenaitem->key) {
574 NR_ARENA_ITEM_SET_KEY(v->arenaitem, sp_item_display_key_new(3));
575 }
576 NRArenaItem *ai = sp_clippath_show(SP_CLIPPATH(clip),
577 NR_ARENA_ITEM_ARENA(v->arenaitem),
578 NR_ARENA_ITEM_GET_KEY(v->arenaitem));
579 nr_arena_item_set_clip(v->arenaitem, ai);
580 nr_arena_item_unref(ai);
581 sp_clippath_set_bbox(SP_CLIPPATH(clip), NR_ARENA_ITEM_GET_KEY(v->arenaitem), &bbox);
582 clip->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
583 }
584 }
585 }
587 static void
588 mask_ref_changed(SPObject *old_mask, SPObject *mask, SPItem *item)
589 {
590 if (old_mask) {
591 /* Hide mask */
592 for (SPItemView *v = item->display; v != NULL; v = v->next) {
593 sp_mask_hide(SP_MASK(old_mask), NR_ARENA_ITEM_GET_KEY(v->arenaitem));
594 nr_arena_item_set_mask(v->arenaitem, NULL);
595 }
596 }
597 if (SP_IS_MASK(mask)) {
598 NRRect bbox;
599 sp_item_invoke_bbox(item, &bbox, Geom::identity(), TRUE);
600 for (SPItemView *v = item->display; v != NULL; v = v->next) {
601 if (!v->arenaitem->key) {
602 NR_ARENA_ITEM_SET_KEY(v->arenaitem, sp_item_display_key_new(3));
603 }
604 NRArenaItem *ai = sp_mask_show(SP_MASK(mask),
605 NR_ARENA_ITEM_ARENA(v->arenaitem),
606 NR_ARENA_ITEM_GET_KEY(v->arenaitem));
607 nr_arena_item_set_mask(v->arenaitem, ai);
608 nr_arena_item_unref(ai);
609 sp_mask_set_bbox(SP_MASK(mask), NR_ARENA_ITEM_GET_KEY(v->arenaitem), &bbox);
610 mask->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
611 }
612 }
613 }
615 static void
616 sp_item_update(SPObject *object, SPCtx *ctx, guint flags)
617 {
618 SPItem *item = SP_ITEM(object);
620 if (((SPObjectClass *) (parent_class))->update)
621 (* ((SPObjectClass *) (parent_class))->update)(object, ctx, flags);
623 if (flags & (SP_OBJECT_CHILD_MODIFIED_FLAG | SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG)) {
624 if (flags & SP_OBJECT_MODIFIED_FLAG) {
625 for (SPItemView *v = item->display; v != NULL; v = v->next) {
626 nr_arena_item_set_transform(v->arenaitem, item->transform);
627 }
628 }
630 SPClipPath *clip_path = item->clip_ref ? item->clip_ref->getObject() : NULL;
631 SPMask *mask = item->mask_ref ? item->mask_ref->getObject() : NULL;
633 if ( clip_path || mask ) {
634 NRRect bbox;
635 sp_item_invoke_bbox(item, &bbox, Geom::identity(), TRUE);
636 if (clip_path) {
637 for (SPItemView *v = item->display; v != NULL; v = v->next) {
638 sp_clippath_set_bbox(clip_path, NR_ARENA_ITEM_GET_KEY(v->arenaitem), &bbox);
639 }
640 }
641 if (mask) {
642 for (SPItemView *v = item->display; v != NULL; v = v->next) {
643 sp_mask_set_bbox(mask, NR_ARENA_ITEM_GET_KEY(v->arenaitem), &bbox);
644 }
645 }
646 }
648 if (flags & SP_OBJECT_STYLE_MODIFIED_FLAG) {
649 for (SPItemView *v = item->display; v != NULL; v = v->next) {
650 nr_arena_item_set_opacity(v->arenaitem, SP_SCALE24_TO_FLOAT(object->style->opacity.value));
651 nr_arena_item_set_visible(v->arenaitem, !item->isHidden());
652 }
653 }
654 }
656 /* Update bounding box data used by filters */
657 if (item->style->filter.set && item->display) {
658 Geom::OptRect item_bbox;
659 sp_item_invoke_bbox(item, item_bbox, Geom::identity(), TRUE, SPItem::GEOMETRIC_BBOX);
661 SPItemView *itemview = item->display;
662 do {
663 if (itemview->arenaitem)
664 nr_arena_item_set_item_bbox(itemview->arenaitem, item_bbox);
665 } while ( (itemview = itemview->next) );
666 }
668 // Update libavoid with item geometry (for connector routing).
669 if (item->avoidRef)
670 item->avoidRef->handleSettingChange();
671 }
673 static Inkscape::XML::Node *
674 sp_item_write(SPObject *const object, Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags)
675 {
676 SPObject *child;
677 SPItem *item = SP_ITEM(object);
679 // in the case of SP_OBJECT_WRITE_BUILD, the item should always be newly created,
680 // so we need to add any children from the underlying object to the new repr
681 if (flags & SP_OBJECT_WRITE_BUILD) {
682 Inkscape::XML::Node *crepr;
683 GSList *l;
684 l = NULL;
685 for (child = sp_object_first_child(object); child != NULL; child = child->next ) {
686 if (!SP_IS_TITLE(child) && !SP_IS_DESC(child)) continue;
687 crepr = child->updateRepr(xml_doc, NULL, flags);
688 if (crepr) l = g_slist_prepend (l, crepr);
689 }
690 while (l) {
691 repr->addChild((Inkscape::XML::Node *) l->data, NULL);
692 Inkscape::GC::release((Inkscape::XML::Node *) l->data);
693 l = g_slist_remove (l, l->data);
694 }
695 } else {
696 for (child = sp_object_first_child(object) ; child != NULL; child = child->next ) {
697 if (!SP_IS_TITLE(child) && !SP_IS_DESC(child)) continue;
698 child->updateRepr(flags);
699 }
700 }
702 gchar *c = sp_svg_transform_write(item->transform);
703 repr->setAttribute("transform", c);
704 g_free(c);
706 if (flags & SP_OBJECT_WRITE_EXT) {
707 repr->setAttribute("sodipodi:insensitive", ( item->sensitive ? NULL : "true" ));
708 if (item->transform_center_x != 0)
709 sp_repr_set_svg_double (repr, "inkscape:transform-center-x", item->transform_center_x);
710 else
711 repr->setAttribute ("inkscape:transform-center-x", NULL);
712 if (item->transform_center_y != 0)
713 sp_repr_set_svg_double (repr, "inkscape:transform-center-y", item->transform_center_y);
714 else
715 repr->setAttribute ("inkscape:transform-center-y", NULL);
716 }
718 if (item->clip_ref->getObject()) {
719 const gchar *value = g_strdup_printf ("url(%s)", item->clip_ref->getURI()->toString());
720 repr->setAttribute ("clip-path", value);
721 g_free ((void *) value);
722 }
723 if (item->mask_ref->getObject()) {
724 const gchar *value = g_strdup_printf ("url(%s)", item->mask_ref->getURI()->toString());
725 repr->setAttribute ("mask", value);
726 g_free ((void *) value);
727 }
729 if (((SPObjectClass *) (parent_class))->write) {
730 ((SPObjectClass *) (parent_class))->write(object, xml_doc, repr, flags);
731 }
733 return repr;
734 }
736 /**
737 * \return There is no guarantee that the return value will contain a rectangle.
738 If this item does not have a boundingbox, it might well be empty.
739 */
740 Geom::OptRect SPItem::getBounds(Geom::Matrix const &transform,
741 SPItem::BBoxType type,
742 unsigned int /*dkey*/) const
743 {
744 Geom::OptRect r;
745 sp_item_invoke_bbox_full(this, r, transform, type, TRUE);
746 return r;
747 }
749 void
750 sp_item_invoke_bbox(SPItem const *item, Geom::OptRect &bbox, Geom::Matrix const &transform, unsigned const clear, SPItem::BBoxType type)
751 {
752 sp_item_invoke_bbox_full(item, bbox, transform, type, clear);
753 }
755 // DEPRECATED to phase out the use of NRRect in favor of Geom::OptRect
756 void
757 sp_item_invoke_bbox(SPItem const *item, NRRect *bbox, Geom::Matrix const &transform, unsigned const clear, SPItem::BBoxType type)
758 {
759 sp_item_invoke_bbox_full(item, bbox, transform, type, clear);
760 }
762 /** Calls \a item's subclass' bounding box method; clips it by the bbox of clippath, if any; and
763 * unions the resulting bbox with \a bbox. If \a clear is true, empties \a bbox first. Passes the
764 * transform and the flags to the actual bbox methods. Note that many of subclasses (e.g. groups,
765 * clones), in turn, call this function in their bbox methods.
766 * \retval bbox Note that there is no guarantee that bbox will contain a rectangle when the
767 * function returns. If this item does not have a boundingbox, this might well be empty.
768 */
769 void
770 sp_item_invoke_bbox_full(SPItem const *item, Geom::OptRect &bbox, Geom::Matrix const &transform, unsigned const flags, unsigned const clear)
771 {
772 g_assert(item != NULL);
773 g_assert(SP_IS_ITEM(item));
775 if (clear) {
776 bbox = Geom::OptRect();
777 }
779 // TODO: replace NRRect by Geom::Rect, for all SPItemClasses, and for SP_CLIPPATH
781 NRRect temp_bbox;
782 temp_bbox.x0 = temp_bbox.y0 = NR_HUGE;
783 temp_bbox.x1 = temp_bbox.y1 = -NR_HUGE;
785 // call the subclass method
786 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->bbox) {
787 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->bbox(item, &temp_bbox, transform, flags);
788 }
790 // unless this is geometric bbox, extend by filter area and crop the bbox by clip path, if any
791 if ((SPItem::BBoxType) flags != SPItem::GEOMETRIC_BBOX) {
792 if ( item->style && item->style->filter.href ) {
793 SPObject *filter = item->style->getFilter();
794 if (filter && SP_IS_FILTER(filter)) {
795 // default filer area per the SVG spec:
796 double x = -0.1;
797 double y = -0.1;
798 double w = 1.2;
799 double h = 1.2;
801 // if area is explicitly set, override:
802 if (SP_FILTER(filter)->x._set)
803 x = SP_FILTER(filter)->x.computed;
804 if (SP_FILTER(filter)->y._set)
805 y = SP_FILTER(filter)->y.computed;
806 if (SP_FILTER(filter)->width._set)
807 w = SP_FILTER(filter)->width.computed;
808 if (SP_FILTER(filter)->height._set)
809 h = SP_FILTER(filter)->height.computed;
811 double dx0 = 0;
812 double dx1 = 0;
813 double dy0 = 0;
814 double dy1 = 0;
815 if (filter_is_single_gaussian_blur(SP_FILTER(filter))) {
816 // if this is a single blur, use 2.4*radius
817 // which may be smaller than the default area;
818 // see set_filter_area for why it's 2.4
819 double r = get_single_gaussian_blur_radius (SP_FILTER(filter));
820 dx0 = -2.4 * r;
821 dx1 = 2.4 * r;
822 dy0 = -2.4 * r;
823 dy1 = 2.4 * r;
824 } else {
825 // otherwise, calculate expansion from relative to absolute units:
826 dx0 = x * (temp_bbox.x1 - temp_bbox.x0);
827 dx1 = (w + x - 1) * (temp_bbox.x1 - temp_bbox.x0);
828 dy0 = y * (temp_bbox.y1 - temp_bbox.y0);
829 dy1 = (h + y - 1) * (temp_bbox.y1 - temp_bbox.y0);
830 }
832 // transform the expansions by the item's transform:
833 Geom::Matrix i2d(sp_item_i2d_affine (item));
834 dx0 *= i2d.expansionX();
835 dx1 *= i2d.expansionX();
836 dy0 *= i2d.expansionY();
837 dy1 *= i2d.expansionY();
839 // expand the bbox
840 temp_bbox.x0 += dx0;
841 temp_bbox.x1 += dx1;
842 temp_bbox.y0 += dy0;
843 temp_bbox.y1 += dy1;
844 }
845 }
846 if (item->clip_ref->getObject()) {
847 NRRect b;
848 sp_clippath_get_bbox(SP_CLIPPATH(item->clip_ref->getObject()), &b, transform, flags);
849 nr_rect_d_intersect (&temp_bbox, &temp_bbox, &b);
850 }
851 }
853 if (temp_bbox.x0 > temp_bbox.x1 || temp_bbox.y0 > temp_bbox.y1) {
854 // Either the bbox hasn't been touched by the SPItemClass' bbox method
855 // (it still has its initial values, see above: x0 = y0 = NR_HUGE and x1 = y1 = -NR_HUGE)
856 // or it has explicitely been set to be like this (e.g. in sp_shape_bbox)
858 // When x0 > x1 or y0 > y1, the bbox is considered to be "nothing", although it has not been
859 // explicitely defined this way for NRRects (as opposed to Geom::OptRect)
860 // So union bbox with nothing = do nothing, just return
861 return;
862 }
864 // Do not use temp_bbox.upgrade() here, because it uses a test that returns an empty Geom::OptRect()
865 // for any rectangle with zero area. The geometrical bbox of for example a vertical line
866 // would therefore be translated into empty Geom::OptRect() (see bug https://bugs.launchpad.net/inkscape/+bug/168684)
867 Geom::OptRect temp_bbox_new = Geom::Rect(Geom::Point(temp_bbox.x0, temp_bbox.y0), Geom::Point(temp_bbox.x1, temp_bbox.y1));
869 bbox = Geom::unify(bbox, temp_bbox_new);
870 }
872 // DEPRECATED to phase out the use of NRRect in favor of Geom::OptRect
873 /** Calls \a item's subclass' bounding box method; clips it by the bbox of clippath, if any; and
874 * unions the resulting bbox with \a bbox. If \a clear is true, empties \a bbox first. Passes the
875 * transform and the flags to the actual bbox methods. Note that many of subclasses (e.g. groups,
876 * clones), in turn, call this function in their bbox methods. */
877 void
878 sp_item_invoke_bbox_full(SPItem const *item, NRRect *bbox, Geom::Matrix const &transform, unsigned const flags, unsigned const clear)
879 {
880 g_assert(item != NULL);
881 g_assert(SP_IS_ITEM(item));
882 g_assert(bbox != NULL);
884 if (clear) {
885 bbox->x0 = bbox->y0 = 1e18;
886 bbox->x1 = bbox->y1 = -1e18;
887 }
889 NRRect this_bbox;
890 this_bbox.x0 = this_bbox.y0 = 1e18;
891 this_bbox.x1 = this_bbox.y1 = -1e18;
893 // call the subclass method
894 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->bbox) {
895 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->bbox(item, &this_bbox, transform, flags);
896 }
898 // unless this is geometric bbox, crop the bbox by clip path, if any
899 if ((SPItem::BBoxType) flags != SPItem::GEOMETRIC_BBOX && item->clip_ref->getObject()) {
900 NRRect b;
901 sp_clippath_get_bbox(SP_CLIPPATH(item->clip_ref->getObject()), &b, transform, flags);
902 nr_rect_d_intersect (&this_bbox, &this_bbox, &b);
903 }
905 // if non-empty (with some tolerance - ?) union this_bbox with the bbox we've got passed
906 if ( fabs(this_bbox.x1-this_bbox.x0) > -0.00001 && fabs(this_bbox.y1-this_bbox.y0) > -0.00001 ) {
907 nr_rect_d_union (bbox, bbox, &this_bbox);
908 }
909 }
911 unsigned sp_item_pos_in_parent(SPItem *item)
912 {
913 g_assert(item != NULL);
914 g_assert(SP_IS_ITEM(item));
916 SPObject *parent = item->parent;
917 g_assert(parent != NULL);
918 g_assert(SP_IS_OBJECT(parent));
920 SPObject *object = item;
922 unsigned pos = 0;
923 for ( SPObject *iter = sp_object_first_child(parent) ; iter ; iter = iter->next) {
924 if ( iter == object ) {
925 return pos;
926 }
927 if (SP_IS_ITEM(iter)) {
928 pos++;
929 }
930 }
932 g_assert_not_reached();
933 return 0;
934 }
936 void
937 sp_item_bbox_desktop(SPItem *item, NRRect *bbox, SPItem::BBoxType type)
938 {
939 g_assert(item != NULL);
940 g_assert(SP_IS_ITEM(item));
941 g_assert(bbox != NULL);
943 sp_item_invoke_bbox(item, bbox, sp_item_i2d_affine(item), TRUE, type);
944 }
946 Geom::OptRect sp_item_bbox_desktop(SPItem *item, SPItem::BBoxType type)
947 {
948 Geom::OptRect rect = Geom::OptRect();
949 sp_item_invoke_bbox(item, rect, sp_item_i2d_affine(item), TRUE, type);
950 return rect;
951 }
953 static void sp_item_private_snappoints(SPItem const *item, std::vector<Inkscape::SnapCandidatePoint> &p, Inkscape::SnapPreferences const */*snapprefs*/)
954 {
955 /* This will only be called if the derived class doesn't override this.
956 * see for example sp_genericellipse_snappoints in sp-ellipse.cpp
957 * We don't know what shape we could be dealing with here, so we'll just
958 * return the corners of the bounding box */
960 Geom::OptRect bbox = item->getBounds(sp_item_i2d_affine(item));
962 if (bbox) {
963 Geom::Point p1, p2;
964 p1 = bbox->min();
965 p2 = bbox->max();
966 p.push_back(Inkscape::SnapCandidatePoint(p1, Inkscape::SNAPSOURCE_BBOX_CORNER, Inkscape::SNAPTARGET_BBOX_CORNER));
967 p.push_back(Inkscape::SnapCandidatePoint(Geom::Point(p1[Geom::X], p2[Geom::Y]), Inkscape::SNAPSOURCE_BBOX_CORNER, Inkscape::SNAPTARGET_BBOX_CORNER));
968 p.push_back(Inkscape::SnapCandidatePoint(p2, Inkscape::SNAPSOURCE_BBOX_CORNER, Inkscape::SNAPTARGET_BBOX_CORNER));
969 p.push_back(Inkscape::SnapCandidatePoint(Geom::Point(p2[Geom::X], p1[Geom::Y]), Inkscape::SNAPSOURCE_BBOX_CORNER, Inkscape::SNAPTARGET_BBOX_CORNER));
970 }
972 }
974 void sp_item_snappoints(SPItem const *item, std::vector<Inkscape::SnapCandidatePoint> &p, Inkscape::SnapPreferences const *snapprefs)
975 {
976 if (item == NULL) {
977 g_warning("sp_item_snappoints: cannot snap because no item is being provided");
978 return;
979 }
981 if (!SP_IS_ITEM(item)) {
982 g_warning("sp_item_snappoints: cannot snap because this is not a SP_ITEM");
983 return;
984 }
986 // Get the snappoints of the item
987 SPItemClass const &item_class = *(SPItemClass const *) G_OBJECT_GET_CLASS(item);
988 if (item_class.snappoints) {
989 item_class.snappoints(item, p, snapprefs);
990 }
992 // Get the snappoints at the item's center
993 if (snapprefs != NULL && snapprefs->getIncludeItemCenter()) {
994 p.push_back(Inkscape::SnapCandidatePoint(item->getCenter(), Inkscape::SNAPSOURCE_ROTATION_CENTER, Inkscape::SNAPTARGET_ROTATION_CENTER));
995 }
997 // Get the snappoints of clipping paths and mask, if any
998 std::list<SPObject const *> clips_and_masks;
1000 clips_and_masks.push_back(item->clip_ref->getObject());
1001 clips_and_masks.push_back(item->mask_ref->getObject());
1003 SPDesktop *desktop = inkscape_active_desktop();
1004 for (std::list<SPObject const *>::const_iterator o = clips_and_masks.begin(); o != clips_and_masks.end(); o++) {
1005 if (*o) {
1006 // obj is a group object, the children are the actual clippers
1007 for (SPObject *child = (*o)->children ; child ; child = child->next) {
1008 if (SP_IS_ITEM(child)) {
1009 std::vector<Inkscape::SnapCandidatePoint> p_clip_or_mask;
1010 // Please note the recursive call here!
1011 sp_item_snappoints(SP_ITEM(child), p_clip_or_mask, snapprefs);
1012 // Take into account the transformation of the item being clipped or masked
1013 for (std::vector<Inkscape::SnapCandidatePoint>::const_iterator p_orig = p_clip_or_mask.begin(); p_orig != p_clip_or_mask.end(); p_orig++) {
1014 // All snappoints are in desktop coordinates, but the item's transformation is
1015 // in document coordinates. Hence the awkward construction below
1016 Geom::Point pt = desktop->dt2doc((*p_orig).getPoint()) * sp_item_i2d_affine(item);
1017 p.push_back(Inkscape::SnapCandidatePoint(pt, (*p_orig).getSourceType(), (*p_orig).getTargetType()));
1018 }
1019 }
1020 }
1021 }
1022 }
1023 }
1025 void
1026 sp_item_invoke_print(SPItem *item, SPPrintContext *ctx)
1027 {
1028 if (!item->isHidden()) {
1029 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->print) {
1030 if (!item->transform.isIdentity()
1031 || item->style->opacity.value != SP_SCALE24_MAX)
1032 {
1033 sp_print_bind(ctx, item->transform, SP_SCALE24_TO_FLOAT(item->style->opacity.value));
1034 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->print(item, ctx);
1035 sp_print_release(ctx);
1036 } else {
1037 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->print(item, ctx);
1038 }
1039 }
1040 }
1041 }
1043 static gchar *
1044 sp_item_private_description(SPItem */*item*/)
1045 {
1046 return g_strdup(_("Object"));
1047 }
1049 /**
1050 * Returns a string suitable for status bar, formatted in pango markup language.
1051 *
1052 * Must be freed by caller.
1053 */
1054 gchar *
1055 sp_item_description(SPItem *item)
1056 {
1057 g_assert(item != NULL);
1058 g_assert(SP_IS_ITEM(item));
1060 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->description) {
1061 gchar *s = ((SPItemClass *) G_OBJECT_GET_CLASS(item))->description(item);
1062 if (s && item->clip_ref->getObject()) {
1063 gchar *snew = g_strdup_printf (_("%s; <i>clipped</i>"), s);
1064 g_free (s);
1065 s = snew;
1066 }
1067 if (s && item->mask_ref->getObject()) {
1068 gchar *snew = g_strdup_printf (_("%s; <i>masked</i>"), s);
1069 g_free (s);
1070 s = snew;
1071 }
1072 if ( item->style && item->style->filter.href && item->style->filter.href->getObject() ) {
1073 const gchar *label = item->style->filter.href->getObject()->label();
1074 gchar *snew;
1075 if (label) {
1076 snew = g_strdup_printf (_("%s; <i>filtered (%s)</i>"), s, _(label));
1077 } else {
1078 snew = g_strdup_printf (_("%s; <i>filtered</i>"), s);
1079 }
1080 g_free (s);
1081 s = snew;
1082 }
1083 return s;
1084 }
1086 g_assert_not_reached();
1087 return NULL;
1088 }
1090 /**
1091 * Allocates unique integer keys.
1092 * \param numkeys Number of keys required.
1093 * \return First allocated key; hence if the returned key is n
1094 * you can use n, n + 1, ..., n + (numkeys - 1)
1095 */
1096 unsigned
1097 sp_item_display_key_new(unsigned numkeys)
1098 {
1099 static unsigned dkey = 0;
1101 dkey += numkeys;
1103 return dkey - numkeys;
1104 }
1106 NRArenaItem *
1107 sp_item_invoke_show(SPItem *item, NRArena *arena, unsigned key, unsigned flags)
1108 {
1109 g_assert(item != NULL);
1110 g_assert(SP_IS_ITEM(item));
1111 g_assert(arena != NULL);
1112 g_assert(NR_IS_ARENA(arena));
1114 NRArenaItem *ai = NULL;
1115 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->show) {
1116 ai = ((SPItemClass *) G_OBJECT_GET_CLASS(item))->show(item, arena, key, flags);
1117 }
1119 if (ai != NULL) {
1120 item->display = sp_item_view_new_prepend(item->display, item, flags, key, ai);
1121 nr_arena_item_set_transform(ai, item->transform);
1122 nr_arena_item_set_opacity(ai, SP_SCALE24_TO_FLOAT(item->style->opacity.value));
1123 nr_arena_item_set_visible(ai, !item->isHidden());
1124 nr_arena_item_set_sensitive(ai, item->sensitive);
1125 if (item->clip_ref->getObject()) {
1126 SPClipPath *cp = item->clip_ref->getObject();
1128 if (!item->display->arenaitem->key) {
1129 NR_ARENA_ITEM_SET_KEY(item->display->arenaitem, sp_item_display_key_new(3));
1130 }
1131 int clip_key = NR_ARENA_ITEM_GET_KEY(item->display->arenaitem);
1133 // Show and set clip
1134 NRArenaItem *ac = sp_clippath_show(cp, arena, clip_key);
1135 nr_arena_item_set_clip(ai, ac);
1136 nr_arena_item_unref(ac);
1138 // Update bbox, in case the clip uses bbox units
1139 NRRect bbox;
1140 sp_item_invoke_bbox(item, &bbox, Geom::identity(), TRUE);
1141 sp_clippath_set_bbox(SP_CLIPPATH(cp), clip_key, &bbox);
1142 cp->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
1143 }
1144 if (item->mask_ref->getObject()) {
1145 SPMask *mask = item->mask_ref->getObject();
1147 if (!item->display->arenaitem->key) {
1148 NR_ARENA_ITEM_SET_KEY(item->display->arenaitem, sp_item_display_key_new(3));
1149 }
1150 int mask_key = NR_ARENA_ITEM_GET_KEY(item->display->arenaitem);
1152 // Show and set mask
1153 NRArenaItem *ac = sp_mask_show(mask, arena, mask_key);
1154 nr_arena_item_set_mask(ai, ac);
1155 nr_arena_item_unref(ac);
1157 // Update bbox, in case the mask uses bbox units
1158 NRRect bbox;
1159 sp_item_invoke_bbox(item, &bbox, Geom::identity(), TRUE);
1160 sp_mask_set_bbox(SP_MASK(mask), mask_key, &bbox);
1161 mask->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
1162 }
1163 NR_ARENA_ITEM_SET_DATA(ai, item);
1164 Geom::OptRect item_bbox;
1165 sp_item_invoke_bbox(item, item_bbox, Geom::identity(), TRUE, SPItem::GEOMETRIC_BBOX);
1166 nr_arena_item_set_item_bbox(ai, item_bbox);
1167 }
1169 return ai;
1170 }
1172 void
1173 sp_item_invoke_hide(SPItem *item, unsigned key)
1174 {
1175 g_assert(item != NULL);
1176 g_assert(SP_IS_ITEM(item));
1178 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->hide) {
1179 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->hide(item, key);
1180 }
1182 SPItemView *ref = NULL;
1183 SPItemView *v = item->display;
1184 while (v != NULL) {
1185 SPItemView *next = v->next;
1186 if (v->key == key) {
1187 if (item->clip_ref->getObject()) {
1188 sp_clippath_hide(item->clip_ref->getObject(), NR_ARENA_ITEM_GET_KEY(v->arenaitem));
1189 nr_arena_item_set_clip(v->arenaitem, NULL);
1190 }
1191 if (item->mask_ref->getObject()) {
1192 sp_mask_hide(item->mask_ref->getObject(), NR_ARENA_ITEM_GET_KEY(v->arenaitem));
1193 nr_arena_item_set_mask(v->arenaitem, NULL);
1194 }
1195 if (!ref) {
1196 item->display = v->next;
1197 } else {
1198 ref->next = v->next;
1199 }
1200 nr_arena_item_unparent(v->arenaitem);
1201 nr_arena_item_unref(v->arenaitem);
1202 g_free(v);
1203 } else {
1204 ref = v;
1205 }
1206 v = next;
1207 }
1208 }
1210 // Adjusters
1212 void
1213 sp_item_adjust_pattern (SPItem *item, Geom::Matrix const &postmul, bool set)
1214 {
1215 SPStyle *style = item->style;
1217 if ( style && style->fill.isPaintserver() ) {
1218 SPPaintServer *server = item->style->getFillPaintServer();
1219 if ( SP_IS_PATTERN(server) ) {
1220 SPPattern *pattern = sp_pattern_clone_if_necessary(item, SP_PATTERN(server), "fill");
1221 sp_pattern_transform_multiply(pattern, postmul, set);
1222 }
1223 }
1225 if ( style && style->stroke.isPaintserver() ) {
1226 SPPaintServer *server = item->style->getStrokePaintServer();
1227 if ( SP_IS_PATTERN(server) ) {
1228 SPPattern *pattern = sp_pattern_clone_if_necessary(item, SP_PATTERN(server), "stroke");
1229 sp_pattern_transform_multiply(pattern, postmul, set);
1230 }
1231 }
1232 }
1234 void sp_item_adjust_gradient( SPItem *item, Geom::Matrix const &postmul, bool set )
1235 {
1236 SPStyle *style = item->style;
1238 if ( style && style->fill.isPaintserver() ) {
1239 SPPaintServer *server = item->style->getFillPaintServer();
1240 if ( SP_IS_GRADIENT(server) ) {
1242 /**
1243 * \note Bbox units for a gradient are generally a bad idea because
1244 * with them, you cannot preserve the relative position of the
1245 * object and its gradient after rotation or skew. So now we
1246 * convert them to userspace units which are easy to keep in sync
1247 * just by adding the object's transform to gradientTransform.
1248 * \todo FIXME: convert back to bbox units after transforming with
1249 * the item, so as to preserve the original units.
1250 */
1251 SPGradient *gradient = sp_gradient_convert_to_userspace( SP_GRADIENT(server), item, "fill" );
1253 sp_gradient_transform_multiply( gradient, postmul, set );
1254 }
1255 }
1257 if ( style && style->stroke.isPaintserver() ) {
1258 SPPaintServer *server = item->style->getStrokePaintServer();
1259 if ( SP_IS_GRADIENT(server) ) {
1260 SPGradient *gradient = sp_gradient_convert_to_userspace( SP_GRADIENT(server), item, "stroke" );
1261 sp_gradient_transform_multiply( gradient, postmul, set );
1262 }
1263 }
1264 }
1266 void sp_item_adjust_stroke( SPItem *item, gdouble ex )
1267 {
1268 SPStyle *style = item->style;
1270 if ( style && !style->stroke.isNone() && !NR_DF_TEST_CLOSE(ex, 1.0, NR_EPSILON) ) {
1271 style->stroke_width.computed *= ex;
1272 style->stroke_width.set = TRUE;
1274 if ( style->stroke_dash.n_dash != 0 ) {
1275 for (int i = 0; i < style->stroke_dash.n_dash; i++) {
1276 style->stroke_dash.dash[i] *= ex;
1277 }
1278 style->stroke_dash.offset *= ex;
1279 }
1281 item->updateRepr();
1282 }
1283 }
1285 /**
1286 * Find out the inverse of previous transform of an item (from its repr)
1287 */
1288 Geom::Matrix
1289 sp_item_transform_repr (SPItem *item)
1290 {
1291 Geom::Matrix t_old(Geom::identity());
1292 gchar const *t_attr = item->repr->attribute("transform");
1293 if (t_attr) {
1294 Geom::Matrix t;
1295 if (sp_svg_transform_read(t_attr, &t)) {
1296 t_old = t;
1297 }
1298 }
1300 return t_old;
1301 }
1304 /**
1305 * Recursively scale stroke width in \a item and its children by \a expansion.
1306 */
1307 void
1308 sp_item_adjust_stroke_width_recursive(SPItem *item, double expansion)
1309 {
1310 sp_item_adjust_stroke (item, expansion);
1312 // A clone's child is the ghost of its original - we must not touch it, skip recursion
1313 if (item && SP_IS_USE(item))
1314 return;
1316 for (SPObject *o = item->children; o != NULL; o = o->next) {
1317 if (SP_IS_ITEM(o))
1318 sp_item_adjust_stroke_width_recursive(SP_ITEM(o), expansion);
1319 }
1320 }
1322 /**
1323 * Recursively adjust rx and ry of rects.
1324 */
1325 void
1326 sp_item_adjust_rects_recursive(SPItem *item, Geom::Matrix advertized_transform)
1327 {
1328 if (SP_IS_RECT (item)) {
1329 sp_rect_compensate_rxry (SP_RECT(item), advertized_transform);
1330 }
1332 for (SPObject *o = item->children; o != NULL; o = o->next) {
1333 if (SP_IS_ITEM(o))
1334 sp_item_adjust_rects_recursive(SP_ITEM(o), advertized_transform);
1335 }
1336 }
1338 /**
1339 * Recursively compensate pattern or gradient transform.
1340 */
1341 void
1342 sp_item_adjust_paint_recursive (SPItem *item, Geom::Matrix advertized_transform, Geom::Matrix t_ancestors, bool is_pattern)
1343 {
1344 // _Before_ full pattern/gradient transform: t_paint * t_item * t_ancestors
1345 // _After_ full pattern/gradient transform: t_paint_new * t_item * t_ancestors * advertised_transform
1346 // By equating these two expressions we get t_paint_new = t_paint * paint_delta, where:
1347 Geom::Matrix t_item = sp_item_transform_repr (item);
1348 Geom::Matrix paint_delta = t_item * t_ancestors * advertized_transform * t_ancestors.inverse() * t_item.inverse();
1350 // Within text, we do not fork gradients, and so must not recurse to avoid double compensation;
1351 // also we do not recurse into clones, because a clone's child is the ghost of its original -
1352 // we must not touch it
1353 if (!(item && (SP_IS_TEXT(item) || SP_IS_USE(item)))) {
1354 for (SPObject *o = item->children; o != NULL; o = o->next) {
1355 if (SP_IS_ITEM(o)) {
1356 // At the level of the transformed item, t_ancestors is identity;
1357 // below it, it is the accmmulated chain of transforms from this level to the top level
1358 sp_item_adjust_paint_recursive (SP_ITEM(o), advertized_transform, t_item * t_ancestors, is_pattern);
1359 }
1360 }
1361 }
1363 // We recursed into children first, and are now adjusting this object second;
1364 // this is so that adjustments in a tree are done from leaves up to the root,
1365 // and paintservers on leaves inheriting their values from ancestors could adjust themselves properly
1366 // before ancestors themselves are adjusted, probably differently (bug 1286535)
1368 if (is_pattern)
1369 sp_item_adjust_pattern (item, paint_delta);
1370 else
1371 sp_item_adjust_gradient (item, paint_delta);
1373 }
1375 void
1376 sp_item_adjust_livepatheffect (SPItem *item, Geom::Matrix const &postmul, bool set)
1377 {
1378 if ( !SP_IS_LPE_ITEM(item) )
1379 return;
1381 SPLPEItem *lpeitem = SP_LPE_ITEM (item);
1382 if ( sp_lpe_item_has_path_effect(lpeitem) ) {
1383 sp_lpe_item_fork_path_effects_if_necessary(lpeitem);
1385 // now that all LPEs are forked_if_necessary, we can apply the transform
1386 PathEffectList effect_list = sp_lpe_item_get_effect_list(lpeitem);
1387 for (PathEffectList::iterator it = effect_list.begin(); it != effect_list.end(); it++)
1388 {
1389 LivePathEffectObject *lpeobj = (*it)->lpeobject;
1390 if (lpeobj && lpeobj->get_lpe()) {
1391 Inkscape::LivePathEffect::Effect * effect = lpeobj->get_lpe();
1392 effect->transform_multiply(postmul, set);
1393 }
1394 }
1395 }
1396 }
1398 /**
1399 * Set a new transform on an object.
1400 *
1401 * Compensate for stroke scaling and gradient/pattern fill transform, if
1402 * necessary. Call the object's set_transform method if transforms are
1403 * stored optimized. Send _transformed_signal. Invoke _write method so that
1404 * the repr is updated with the new transform.
1405 */
1406 void
1407 sp_item_write_transform(SPItem *item, Inkscape::XML::Node *repr, Geom::Matrix const &transform, Geom::Matrix const *adv, bool compensate)
1408 {
1409 g_return_if_fail(item != NULL);
1410 g_return_if_fail(SP_IS_ITEM(item));
1411 g_return_if_fail(repr != NULL);
1413 // calculate the relative transform, if not given by the adv attribute
1414 Geom::Matrix advertized_transform;
1415 if (adv != NULL) {
1416 advertized_transform = *adv;
1417 } else {
1418 advertized_transform = sp_item_transform_repr (item).inverse() * transform;
1419 }
1421 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1422 if (compensate) {
1424 // recursively compensate for stroke scaling, depending on user preference
1425 if (!prefs->getBool("/options/transform/stroke", true)) {
1426 double const expansion = 1. / advertized_transform.descrim();
1427 sp_item_adjust_stroke_width_recursive(item, expansion);
1428 }
1430 // recursively compensate rx/ry of a rect if requested
1431 if (!prefs->getBool("/options/transform/rectcorners", true)) {
1432 sp_item_adjust_rects_recursive(item, advertized_transform);
1433 }
1435 // recursively compensate pattern fill if it's not to be transformed
1436 if (!prefs->getBool("/options/transform/pattern", true)) {
1437 sp_item_adjust_paint_recursive (item, advertized_transform.inverse(), Geom::identity(), true);
1438 }
1439 /// \todo FIXME: add the same else branch as for gradients below, to convert patterns to userSpaceOnUse as well
1440 /// recursively compensate gradient fill if it's not to be transformed
1441 if (!prefs->getBool("/options/transform/gradient", true)) {
1442 sp_item_adjust_paint_recursive (item, advertized_transform.inverse(), Geom::identity(), false);
1443 } else {
1444 // this converts the gradient/pattern fill/stroke, if any, to userSpaceOnUse; we need to do
1445 // it here _before_ the new transform is set, so as to use the pre-transform bbox
1446 sp_item_adjust_paint_recursive (item, Geom::identity(), Geom::identity(), false);
1447 }
1449 } // endif(compensate)
1451 gint preserve = prefs->getBool("/options/preservetransform/value", 0);
1452 Geom::Matrix transform_attr (transform);
1453 if ( // run the object's set_transform (i.e. embed transform) only if:
1454 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->set_transform && // it does have a set_transform method
1455 !preserve && // user did not chose to preserve all transforms
1456 !item->clip_ref->getObject() && // the object does not have a clippath
1457 !item->mask_ref->getObject() && // the object does not have a mask
1458 !(!transform.isTranslation() && item->style && item->style->getFilter())
1459 // the object does not have a filter, or the transform is translation (which is supposed to not affect filters)
1460 ) {
1461 transform_attr = ((SPItemClass *) G_OBJECT_GET_CLASS(item))->set_transform(item, transform);
1462 }
1463 sp_item_set_item_transform(item, transform_attr);
1465 // Note: updateRepr comes before emitting the transformed signal since
1466 // it causes clone SPUse's copy of the original object to brought up to
1467 // date with the original. Otherwise, sp_use_bbox returns incorrect
1468 // values if called in code handling the transformed signal.
1469 item->updateRepr();
1471 // send the relative transform with a _transformed_signal
1472 item->_transformed_signal.emit(&advertized_transform, item);
1473 }
1475 gint
1476 sp_item_event(SPItem *item, SPEvent *event)
1477 {
1478 g_return_val_if_fail(item != NULL, FALSE);
1479 g_return_val_if_fail(SP_IS_ITEM(item), FALSE);
1480 g_return_val_if_fail(event != NULL, FALSE);
1482 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->event)
1483 return ((SPItemClass *) G_OBJECT_GET_CLASS(item))->event(item, event);
1485 return FALSE;
1486 }
1488 /**
1489 * Sets item private transform (not propagated to repr), without compensating stroke widths,
1490 * gradients, patterns as sp_item_write_transform does.
1491 */
1492 void
1493 sp_item_set_item_transform(SPItem *item, Geom::Matrix const &transform)
1494 {
1495 g_return_if_fail(item != NULL);
1496 g_return_if_fail(SP_IS_ITEM(item));
1498 if (!matrix_equalp(transform, item->transform, NR_EPSILON)) {
1499 item->transform = transform;
1500 /* The SP_OBJECT_USER_MODIFIED_FLAG_B is used to mark the fact that it's only a
1501 transformation. It's apparently not used anywhere else. */
1502 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_USER_MODIFIED_FLAG_B);
1503 sp_item_rm_unsatisfied_cns(*item);
1504 }
1505 }
1507 void
1508 sp_item_convert_item_to_guides(SPItem *item) {
1509 g_return_if_fail(item != NULL);
1510 g_return_if_fail(SP_IS_ITEM(item));
1512 /* Use derived method if present ... */
1513 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->convert_to_guides) {
1514 (*((SPItemClass *) G_OBJECT_GET_CLASS(item))->convert_to_guides)(item);
1515 return;
1516 }
1518 /* .. otherwise simply place the guides around the item's bounding box */
1520 sp_item_convert_to_guides(item);
1521 }
1524 /**
1525 * \pre \a ancestor really is an ancestor (\>=) of \a object, or NULL.
1526 * ("Ancestor (\>=)" here includes as far as \a object itself.)
1527 */
1528 Geom::Matrix
1529 i2anc_affine(SPObject const *object, SPObject const *const ancestor) {
1530 Geom::Matrix ret(Geom::identity());
1531 g_return_val_if_fail(object != NULL, ret);
1533 /* stop at first non-renderable ancestor */
1534 while ( object != ancestor && SP_IS_ITEM(object) ) {
1535 if (SP_IS_ROOT(object)) {
1536 ret *= SP_ROOT(object)->c2p;
1537 } else {
1538 ret *= SP_ITEM(object)->transform;
1539 }
1540 object = object->parent;
1541 }
1542 return ret;
1543 }
1545 Geom::Matrix
1546 i2i_affine(SPObject const *src, SPObject const *dest) {
1547 g_return_val_if_fail(src != NULL && dest != NULL, Geom::identity());
1548 SPObject const *ancestor = src->nearestCommonAncestor(dest);
1549 return i2anc_affine(src, ancestor) * i2anc_affine(dest, ancestor).inverse();
1550 }
1552 Geom::Matrix SPItem::getRelativeTransform(SPObject const *dest) const {
1553 return i2i_affine(this, dest);
1554 }
1556 /**
1557 * Returns the accumulated transformation of the item and all its ancestors, including root's viewport.
1558 * \pre (item != NULL) and SP_IS_ITEM(item).
1559 */
1560 Geom::Matrix sp_item_i2doc_affine(SPItem const *item)
1561 {
1562 return i2anc_affine(item, NULL);
1563 }
1565 /**
1566 * Returns the transformation from item to desktop coords
1567 */
1568 Geom::Matrix sp_item_i2d_affine(SPItem const *item)
1569 {
1570 g_assert(item != NULL);
1571 g_assert(SP_IS_ITEM(item));
1573 Geom::Matrix const ret( sp_item_i2doc_affine(item)
1574 * Geom::Scale(1, -1)
1575 * Geom::Translate(0, sp_document_height(item->document)) );
1576 return ret;
1577 }
1579 void sp_item_set_i2d_affine(SPItem *item, Geom::Matrix const &i2dt)
1580 {
1581 g_return_if_fail( item != NULL );
1582 g_return_if_fail( SP_IS_ITEM(item) );
1584 Geom::Matrix dt2p; /* desktop to item parent transform */
1585 if (item->parent) {
1586 dt2p = sp_item_i2d_affine(static_cast<SPItem *>(item->parent)).inverse();
1587 } else {
1588 dt2p = ( Geom::Translate(0, -sp_document_height(item->document))
1589 * Geom::Scale(1, -1) );
1590 }
1592 Geom::Matrix const i2p( i2dt * dt2p );
1593 sp_item_set_item_transform(item, i2p);
1594 }
1597 /**
1598 * should rather be named "sp_item_d2i_affine" to match "sp_item_i2d_affine" (or vice versa)
1599 */
1600 Geom::Matrix
1601 sp_item_dt2i_affine(SPItem const *item)
1602 {
1603 /* fixme: Implement the right way (Lauris) */
1604 return sp_item_i2d_affine(item).inverse();
1605 }
1607 /* Item views */
1609 static SPItemView *
1610 sp_item_view_new_prepend(SPItemView *list, SPItem *item, unsigned flags, unsigned key, NRArenaItem *arenaitem)
1611 {
1612 SPItemView *new_view;
1614 g_assert(item != NULL);
1615 g_assert(SP_IS_ITEM(item));
1616 g_assert(arenaitem != NULL);
1617 g_assert(NR_IS_ARENA_ITEM(arenaitem));
1619 new_view = g_new(SPItemView, 1);
1621 new_view->next = list;
1622 new_view->flags = flags;
1623 new_view->key = key;
1624 new_view->arenaitem = arenaitem;
1626 return new_view;
1627 }
1629 static SPItemView *
1630 sp_item_view_list_remove(SPItemView *list, SPItemView *view)
1631 {
1632 if (view == list) {
1633 list = list->next;
1634 } else {
1635 SPItemView *prev;
1636 prev = list;
1637 while (prev->next != view) prev = prev->next;
1638 prev->next = view->next;
1639 }
1641 nr_arena_item_unref(view->arenaitem);
1642 g_free(view);
1644 return list;
1645 }
1647 /**
1648 * Return the arenaitem corresponding to the given item in the display
1649 * with the given key
1650 */
1651 NRArenaItem *
1652 sp_item_get_arenaitem(SPItem *item, unsigned key)
1653 {
1654 for ( SPItemView *iv = item->display ; iv ; iv = iv->next ) {
1655 if ( iv->key == key ) {
1656 return iv->arenaitem;
1657 }
1658 }
1660 return NULL;
1661 }
1663 int
1664 sp_item_repr_compare_position(SPItem *first, SPItem *second)
1665 {
1666 return sp_repr_compare_position(first->repr,
1667 second->repr);
1668 }
1670 SPItem *
1671 sp_item_first_item_child (SPObject *obj)
1672 {
1673 for ( SPObject *iter = sp_object_first_child(obj) ; iter ; iter = iter->next) {
1674 if ( SP_IS_ITEM(iter) ) {
1675 return SP_ITEM (iter);
1676 }
1677 }
1678 return NULL;
1679 }
1681 void
1682 sp_item_convert_to_guides(SPItem *item) {
1683 SPDesktop *dt = inkscape_active_desktop();
1684 SPNamedView *nv = sp_desktop_namedview(dt);
1685 (void)nv;
1687 Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1688 int prefs_bbox = prefs->getInt("/tools/bounding_box", 0);
1689 SPItem::BBoxType bbox_type = (prefs_bbox ==0)?
1690 SPItem::APPROXIMATE_BBOX : SPItem::GEOMETRIC_BBOX;
1692 Geom::OptRect bbox = sp_item_bbox_desktop(item, bbox_type);
1693 if (!bbox) {
1694 g_warning ("Cannot determine item's bounding box during conversion to guides.\n");
1695 return;
1696 }
1698 std::list<std::pair<Geom::Point, Geom::Point> > pts;
1700 Geom::Point A((*bbox).min());
1701 Geom::Point C((*bbox).max());
1702 Geom::Point B(A[Geom::X], C[Geom::Y]);
1703 Geom::Point D(C[Geom::X], A[Geom::Y]);
1705 pts.push_back(std::make_pair(A, B));
1706 pts.push_back(std::make_pair(B, C));
1707 pts.push_back(std::make_pair(C, D));
1708 pts.push_back(std::make_pair(D, A));
1710 sp_guide_pt_pairs_to_guides(dt, pts);
1711 }
1713 /*
1714 Local Variables:
1715 mode:c++
1716 c-file-style:"stroustrup"
1717 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1718 indent-tabs-mode:nil
1719 fill-column:99
1720 End:
1721 */
1722 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :