1 #define __SP_ITEM_C__
3 /** \file
4 * Base class for visual SVG elements
5 */
6 /*
7 * Authors:
8 * Lauris Kaplinski <lauris@kaplinski.com>
9 * bulia byak <buliabyak@users.sf.net>
10 * Johan Engelen <j.b.c.engelen@ewi.utwente.nl>
11 *
12 * Copyright (C) 2001-2006 authors
13 * Copyright (C) 2001 Ximian, Inc.
14 *
15 * Released under GNU GPL, read the file 'COPYING' for more information
16 */
18 /** \class SPItem
19 *
20 * SPItem is an abstract base class for all graphic (visible) SVG nodes. It
21 * is a subclass of SPObject, with great deal of specific functionality.
22 */
24 #ifdef HAVE_CONFIG_H
25 # include "config.h"
26 #endif
29 #include "sp-item.h"
30 #include "svg/svg.h"
31 #include "print.h"
32 #include "display/nr-arena.h"
33 #include "display/nr-arena-item.h"
34 #include "attributes.h"
35 #include "document.h"
36 #include "uri.h"
38 #include "style.h"
39 #include <glibmm/i18n.h>
40 #include "sp-root.h"
41 #include "sp-clippath.h"
42 #include "sp-mask.h"
43 #include "sp-rect.h"
44 #include "sp-use.h"
45 #include "sp-text.h"
46 #include "sp-item-rm-unsatisfied-cns.h"
47 #include "sp-pattern.h"
48 #include "sp-switch.h"
49 #include "gradient-chemistry.h"
50 #include "prefs-utils.h"
51 #include "conn-avoid-ref.h"
52 #include "conditions.h"
54 #include "libnr/nr-matrix-div.h"
55 #include "libnr/nr-matrix-fns.h"
56 #include "libnr/nr-matrix-scale-ops.h"
57 #include "libnr/nr-matrix-translate-ops.h"
58 #include "libnr/nr-scale-translate-ops.h"
59 #include "libnr/nr-translate-scale-ops.h"
60 #include "algorithms/find-last-if.h"
61 #include "util/reverse-list.h"
63 #include "xml/repr.h"
65 #define noSP_ITEM_DEBUG_IDLE
67 static void sp_item_class_init(SPItemClass *klass);
68 static void sp_item_init(SPItem *item);
70 static void sp_item_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
71 static void sp_item_release(SPObject *object);
72 static void sp_item_set(SPObject *object, unsigned key, gchar const *value);
73 static void sp_item_update(SPObject *object, SPCtx *ctx, guint flags);
74 static Inkscape::XML::Node *sp_item_write(SPObject *object, Inkscape::XML::Node *repr, guint flags);
76 static gchar *sp_item_private_description(SPItem *item);
77 static void sp_item_private_snappoints(SPItem const *item, SnapPointsIter p);
79 static SPItemView *sp_item_view_new_prepend(SPItemView *list, SPItem *item, unsigned flags, unsigned key, NRArenaItem *arenaitem);
80 static SPItemView *sp_item_view_list_remove(SPItemView *list, SPItemView *view);
82 static SPObjectClass *parent_class;
84 static void clip_ref_changed(SPObject *old_clip, SPObject *clip, SPItem *item);
85 static void mask_ref_changed(SPObject *old_clip, SPObject *clip, SPItem *item);
87 /**
88 * Registers SPItem class and returns its type number.
89 */
90 GType
91 sp_item_get_type(void)
92 {
93 static GType type = 0;
94 if (!type) {
95 GTypeInfo info = {
96 sizeof(SPItemClass),
97 NULL, NULL,
98 (GClassInitFunc) sp_item_class_init,
99 NULL, NULL,
100 sizeof(SPItem),
101 16,
102 (GInstanceInitFunc) sp_item_init,
103 NULL, /* value_table */
104 };
105 type = g_type_register_static(SP_TYPE_OBJECT, "SPItem", &info, (GTypeFlags)0);
106 }
107 return type;
108 }
110 /**
111 * SPItem vtable initialization.
112 */
113 static void
114 sp_item_class_init(SPItemClass *klass)
115 {
116 SPObjectClass *sp_object_class = (SPObjectClass *) klass;
118 parent_class = (SPObjectClass *)g_type_class_ref(SP_TYPE_OBJECT);
120 sp_object_class->build = sp_item_build;
121 sp_object_class->release = sp_item_release;
122 sp_object_class->set = sp_item_set;
123 sp_object_class->update = sp_item_update;
124 sp_object_class->write = sp_item_write;
126 klass->description = sp_item_private_description;
127 klass->snappoints = sp_item_private_snappoints;
128 }
130 /**
131 * Callback for SPItem object initialization.
132 */
133 static void
134 sp_item_init(SPItem *item)
135 {
136 item->init();
137 }
139 void SPItem::init() {
140 this->sensitive = TRUE;
142 this->transform_center_x = 0;
143 this->transform_center_y = 0;
145 this->_is_evaluated = true;
146 this->_evaluated_status = StatusUnknown;
148 this->transform = NR::identity();
150 this->display = NULL;
152 this->clip_ref = new SPClipPathReference(this);
153 sigc::signal<void, SPObject *, SPObject *> cs1=this->clip_ref->changedSignal();
154 sigc::slot2<void,SPObject*, SPObject *> sl1=sigc::bind(sigc::ptr_fun(clip_ref_changed), this);
155 _clip_ref_connection = cs1.connect(sl1);
157 this->mask_ref = new SPMaskReference(this);
158 sigc::signal<void, SPObject *, SPObject *> cs2=this->mask_ref->changedSignal();
159 sigc::slot2<void,SPObject*, SPObject *> sl2=sigc::bind(sigc::ptr_fun(mask_ref_changed), this);
160 _mask_ref_connection = cs2.connect(sl2);
162 if (!this->style) this->style = sp_style_new_from_object(this);
164 this->avoidRef = new SPAvoidRef(this);
166 new (&this->_transformed_signal) sigc::signal<void, NR::Matrix const *, SPItem *>();
167 }
169 bool SPItem::isVisibleAndUnlocked() const {
170 return (!isHidden() && !isLocked());
171 }
173 bool SPItem::isVisibleAndUnlocked(unsigned display_key) const {
174 return (!isHidden(display_key) && !isLocked());
175 }
177 bool SPItem::isLocked() const {
178 for (SPObject *o = SP_OBJECT(this); o != NULL; o = SP_OBJECT_PARENT(o)) {
179 if (SP_IS_ITEM(o) && !(SP_ITEM(o)->sensitive))
180 return true;
181 }
182 return false;
183 }
185 void SPItem::setLocked(bool locked) {
186 SP_OBJECT_REPR(this)->setAttribute("sodipodi:insensitive",
187 ( locked ? "1" : NULL ));
188 updateRepr();
189 }
191 bool SPItem::isHidden() const {
192 if (!isEvaluated())
193 return true;
194 return style->display.computed == SP_CSS_DISPLAY_NONE;
195 }
197 void SPItem::setHidden(bool hide) {
198 style->display.set = TRUE;
199 style->display.value = ( hide ? SP_CSS_DISPLAY_NONE : SP_CSS_DISPLAY_INLINE );
200 style->display.computed = style->display.value;
201 style->display.inherit = FALSE;
202 updateRepr();
203 }
205 bool SPItem::isHidden(unsigned display_key) const {
206 if (!isEvaluated())
207 return true;
208 for ( SPItemView *view(display) ; view ; view = view->next ) {
209 if ( view->key == display_key ) {
210 g_assert(view->arenaitem != NULL);
211 for ( NRArenaItem *arenaitem = view->arenaitem ;
212 arenaitem ; arenaitem = arenaitem->parent )
213 {
214 if (!arenaitem->visible) {
215 return true;
216 }
217 }
218 return false;
219 }
220 }
221 return true;
222 }
224 void SPItem::setEvaluated(bool evaluated) {
225 _is_evaluated = evaluated;
226 _evaluated_status = StatusSet;
227 }
229 void SPItem::resetEvaluated() {
230 if ( StatusCalculated == _evaluated_status ) {
231 _evaluated_status = StatusUnknown;
232 bool oldValue = _is_evaluated;
233 if ( oldValue != isEvaluated() ) {
234 requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
235 }
236 } if ( StatusSet == _evaluated_status ) {
237 SPObject const *const parent = SP_OBJECT_PARENT(this);
238 if (SP_IS_SWITCH(parent)) {
239 SP_SWITCH(parent)->resetChildEvaluated();
240 }
241 }
242 }
244 bool SPItem::isEvaluated() const {
245 if ( StatusUnknown == _evaluated_status ) {
246 _is_evaluated = sp_item_evaluate(this);
247 _evaluated_status = StatusCalculated;
248 }
249 return _is_evaluated;
250 }
252 /**
253 * Returns something suitable for the `Hide' checkbox in the Object Properties dialog box.
254 * Corresponds to setExplicitlyHidden.
255 */
256 bool
257 SPItem::isExplicitlyHidden() const
258 {
259 return (this->style->display.set
260 && this->style->display.value == SP_CSS_DISPLAY_NONE);
261 }
263 /**
264 * Sets the display CSS property to `hidden' if \a val is true,
265 * otherwise makes it unset
266 */
267 void
268 SPItem::setExplicitlyHidden(bool const val) {
269 this->style->display.set = val;
270 this->style->display.value = ( val ? SP_CSS_DISPLAY_NONE : SP_CSS_DISPLAY_INLINE );
271 this->style->display.computed = this->style->display.value;
272 this->updateRepr();
273 }
275 /**
276 * Sets the transform_center_x and transform_center_y properties to retain the rotation centre
277 */
278 void
279 SPItem::setCenter(NR::Point object_centre) {
280 NR::Maybe<NR::Rect> bbox = getBounds(sp_item_i2d_affine(this));
281 if (bbox) {
282 transform_center_x = object_centre[NR::X] - bbox->midpoint()[NR::X];
283 if (fabs(transform_center_x) < 1e-5) // rounding error
284 transform_center_x = 0;
285 transform_center_y = object_centre[NR::Y] - bbox->midpoint()[NR::Y];
286 if (fabs(transform_center_y) < 1e-5) // rounding error
287 transform_center_y = 0;
288 }
289 }
291 void
292 SPItem::unsetCenter() {
293 transform_center_x = 0;
294 transform_center_y = 0;
295 }
297 bool SPItem::isCenterSet() {
298 return (transform_center_x != 0 || transform_center_y != 0);
299 }
301 NR::Point SPItem::getCenter() {
302 NR::Maybe<NR::Rect> bbox = getBounds(sp_item_i2d_affine(this));
303 if (bbox) {
304 return bbox->midpoint() + NR::Point (this->transform_center_x, this->transform_center_y);
305 } else {
306 return NR::Point (0, 0); // something's wrong!
307 }
308 }
311 namespace {
313 bool is_item(SPObject const &object) {
314 return SP_IS_ITEM(&object);
315 }
317 }
319 void SPItem::raiseToTop() {
320 using Inkscape::Algorithms::find_last_if;
322 SPObject *topmost=find_last_if<SPObject::SiblingIterator>(
323 SP_OBJECT_NEXT(this), NULL, &is_item
324 );
325 if (topmost) {
326 Inkscape::XML::Node *repr=SP_OBJECT_REPR(this);
327 sp_repr_parent(repr)->changeOrder(repr, SP_OBJECT_REPR(topmost));
328 }
329 }
331 void SPItem::raiseOne() {
332 SPObject *next_higher=std::find_if<SPObject::SiblingIterator>(
333 SP_OBJECT_NEXT(this), NULL, &is_item
334 );
335 if (next_higher) {
336 Inkscape::XML::Node *repr=SP_OBJECT_REPR(this);
337 Inkscape::XML::Node *ref=SP_OBJECT_REPR(next_higher);
338 sp_repr_parent(repr)->changeOrder(repr, ref);
339 }
340 }
342 void SPItem::lowerOne() {
343 using Inkscape::Util::MutableList;
344 using Inkscape::Util::reverse_list;
346 MutableList<SPObject &> next_lower=std::find_if(
347 reverse_list<SPObject::SiblingIterator>(
348 SP_OBJECT_PARENT(this)->firstChild(), this
349 ),
350 MutableList<SPObject &>(),
351 &is_item
352 );
353 if (next_lower) {
354 ++next_lower;
355 Inkscape::XML::Node *repr=SP_OBJECT_REPR(this);
356 Inkscape::XML::Node *ref=( next_lower ? SP_OBJECT_REPR(&*next_lower) : NULL );
357 sp_repr_parent(repr)->changeOrder(repr, ref);
358 }
359 }
361 void SPItem::lowerToBottom() {
362 using Inkscape::Algorithms::find_last_if;
363 using Inkscape::Util::MutableList;
364 using Inkscape::Util::reverse_list;
366 MutableList<SPObject &> bottom=find_last_if(
367 reverse_list<SPObject::SiblingIterator>(
368 SP_OBJECT_PARENT(this)->firstChild(), this
369 ),
370 MutableList<SPObject &>(),
371 &is_item
372 );
373 if (bottom) {
374 ++bottom;
375 Inkscape::XML::Node *repr=SP_OBJECT_REPR(this);
376 Inkscape::XML::Node *ref=( bottom ? SP_OBJECT_REPR(&*bottom) : NULL );
377 sp_repr_parent(repr)->changeOrder(repr, ref);
378 }
379 }
381 static void
382 sp_item_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
383 {
384 sp_object_read_attr(object, "style");
385 sp_object_read_attr(object, "transform");
386 sp_object_read_attr(object, "clip-path");
387 sp_object_read_attr(object, "mask");
388 sp_object_read_attr(object, "sodipodi:insensitive");
389 sp_object_read_attr(object, "sodipodi:nonprintable");
390 sp_object_read_attr(object, "inkscape:transform-center-x");
391 sp_object_read_attr(object, "inkscape:transform-center-y");
392 sp_object_read_attr(object, "inkscape:connector-avoid");
394 if (((SPObjectClass *) (parent_class))->build) {
395 (* ((SPObjectClass *) (parent_class))->build)(object, document, repr);
396 }
397 }
399 static void
400 sp_item_release(SPObject *object)
401 {
402 SPItem *item = (SPItem *) object;
404 item->_clip_ref_connection.disconnect();
405 item->_mask_ref_connection.disconnect();
407 if (item->clip_ref) {
408 item->clip_ref->detach();
409 delete item->clip_ref;
410 item->clip_ref = NULL;
411 }
413 if (item->mask_ref) {
414 item->mask_ref->detach();
415 delete item->mask_ref;
416 item->mask_ref = NULL;
417 }
419 if (item->avoidRef) {
420 delete item->avoidRef;
421 item->avoidRef = NULL;
422 }
424 if (((SPObjectClass *) (parent_class))->release) {
425 ((SPObjectClass *) parent_class)->release(object);
426 }
428 while (item->display) {
429 nr_arena_item_unparent(item->display->arenaitem);
430 item->display = sp_item_view_list_remove(item->display, item->display);
431 }
433 item->_transformed_signal.~signal();
434 }
436 static void
437 sp_item_set(SPObject *object, unsigned key, gchar const *value)
438 {
439 SPItem *item = (SPItem *) object;
441 switch (key) {
442 case SP_ATTR_TRANSFORM: {
443 NR::Matrix t;
444 if (value && sp_svg_transform_read(value, &t)) {
445 sp_item_set_item_transform(item, t);
446 } else {
447 sp_item_set_item_transform(item, NR::identity());
448 }
449 break;
450 }
451 case SP_PROP_CLIP_PATH: {
452 gchar *uri = Inkscape::parse_css_url(value);
453 if (uri) {
454 try {
455 item->clip_ref->attach(Inkscape::URI(uri));
456 } catch (Inkscape::BadURIException &e) {
457 g_warning("%s", e.what());
458 item->clip_ref->detach();
459 }
460 g_free(uri);
461 } else {
462 item->clip_ref->detach();
463 }
465 break;
466 }
467 case SP_PROP_MASK: {
468 gchar *uri=Inkscape::parse_css_url(value);
469 if (uri) {
470 try {
471 item->mask_ref->attach(Inkscape::URI(uri));
472 } catch (Inkscape::BadURIException &e) {
473 g_warning("%s", e.what());
474 item->mask_ref->detach();
475 }
476 g_free(uri);
477 } else {
478 item->mask_ref->detach();
479 }
481 break;
482 }
483 case SP_ATTR_SODIPODI_INSENSITIVE:
484 item->sensitive = !value;
485 for (SPItemView *v = item->display; v != NULL; v = v->next) {
486 nr_arena_item_set_sensitive(v->arenaitem, item->sensitive);
487 }
488 break;
489 case SP_ATTR_STYLE:
490 sp_style_read_from_object(object->style, object);
491 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
492 break;
493 case SP_ATTR_CONNECTOR_AVOID:
494 item->avoidRef->setAvoid(value);
495 break;
496 case SP_ATTR_TRANSFORM_CENTER_X:
497 if (value) {
498 item->transform_center_x = g_strtod(value, NULL);
499 } else {
500 item->transform_center_x = 0;
501 }
502 break;
503 case SP_ATTR_TRANSFORM_CENTER_Y:
504 if (value) {
505 item->transform_center_y = g_strtod(value, NULL);
506 } else {
507 item->transform_center_y = 0;
508 }
509 break;
510 case SP_PROP_SYSTEM_LANGUAGE:
511 case SP_PROP_REQUIRED_FEATURES:
512 case SP_PROP_REQUIRED_EXTENSIONS:
513 {
514 item->resetEvaluated();
515 // pass to default handler
516 }
517 default:
518 if (SP_ATTRIBUTE_IS_CSS(key)) {
519 sp_style_read_from_object(object->style, object);
520 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
521 } else {
522 if (((SPObjectClass *) (parent_class))->set) {
523 (* ((SPObjectClass *) (parent_class))->set)(object, key, value);
524 }
525 }
526 break;
527 }
528 }
530 static void
531 clip_ref_changed(SPObject *old_clip, SPObject *clip, SPItem *item)
532 {
533 if (old_clip) {
534 SPItemView *v;
535 /* Hide clippath */
536 for (v = item->display; v != NULL; v = v->next) {
537 sp_clippath_hide(SP_CLIPPATH(old_clip), NR_ARENA_ITEM_GET_KEY(v->arenaitem));
538 nr_arena_item_set_clip(v->arenaitem, NULL);
539 }
540 }
541 if (SP_IS_CLIPPATH(clip)) {
542 NRRect bbox;
543 sp_item_invoke_bbox(item, &bbox, NR::identity(), TRUE);
544 for (SPItemView *v = item->display; v != NULL; v = v->next) {
545 if (!v->arenaitem->key) {
546 NR_ARENA_ITEM_SET_KEY(v->arenaitem, sp_item_display_key_new(3));
547 }
548 NRArenaItem *ai = sp_clippath_show(SP_CLIPPATH(clip),
549 NR_ARENA_ITEM_ARENA(v->arenaitem),
550 NR_ARENA_ITEM_GET_KEY(v->arenaitem));
551 nr_arena_item_set_clip(v->arenaitem, ai);
552 nr_arena_item_unref(ai);
553 sp_clippath_set_bbox(SP_CLIPPATH(clip), NR_ARENA_ITEM_GET_KEY(v->arenaitem), &bbox);
554 SP_OBJECT(clip)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
555 }
556 }
557 }
559 static void
560 mask_ref_changed(SPObject *old_mask, SPObject *mask, SPItem *item)
561 {
562 if (old_mask) {
563 /* Hide mask */
564 for (SPItemView *v = item->display; v != NULL; v = v->next) {
565 sp_mask_hide(SP_MASK(old_mask), NR_ARENA_ITEM_GET_KEY(v->arenaitem));
566 nr_arena_item_set_mask(v->arenaitem, NULL);
567 }
568 }
569 if (SP_IS_MASK(mask)) {
570 NRRect bbox;
571 sp_item_invoke_bbox(item, &bbox, NR::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_mask_show(SP_MASK(mask),
577 NR_ARENA_ITEM_ARENA(v->arenaitem),
578 NR_ARENA_ITEM_GET_KEY(v->arenaitem));
579 nr_arena_item_set_mask(v->arenaitem, ai);
580 nr_arena_item_unref(ai);
581 sp_mask_set_bbox(SP_MASK(mask), NR_ARENA_ITEM_GET_KEY(v->arenaitem), &bbox);
582 SP_OBJECT(mask)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
583 }
584 }
585 }
587 static void
588 sp_item_update(SPObject *object, SPCtx *ctx, guint flags)
589 {
590 SPItem *item = SP_ITEM(object);
592 if (((SPObjectClass *) (parent_class))->update)
593 (* ((SPObjectClass *) (parent_class))->update)(object, ctx, flags);
595 if (flags & (SP_OBJECT_CHILD_MODIFIED_FLAG | SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG)) {
596 if (flags & SP_OBJECT_MODIFIED_FLAG) {
597 for (SPItemView *v = item->display; v != NULL; v = v->next) {
598 nr_arena_item_set_transform(v->arenaitem, item->transform);
599 }
600 }
602 SPClipPath *clip_path = item->clip_ref->getObject();
603 SPMask *mask = item->mask_ref->getObject();
605 if ( clip_path || mask ) {
606 NRRect bbox;
607 sp_item_invoke_bbox(item, &bbox, NR::identity(), TRUE);
608 if (clip_path) {
609 for (SPItemView *v = item->display; v != NULL; v = v->next) {
610 sp_clippath_set_bbox(clip_path, NR_ARENA_ITEM_GET_KEY(v->arenaitem), &bbox);
611 }
612 }
613 if (mask) {
614 for (SPItemView *v = item->display; v != NULL; v = v->next) {
615 sp_mask_set_bbox(mask, NR_ARENA_ITEM_GET_KEY(v->arenaitem), &bbox);
616 }
617 }
618 }
620 if (flags & SP_OBJECT_STYLE_MODIFIED_FLAG) {
621 for (SPItemView *v = item->display; v != NULL; v = v->next) {
622 nr_arena_item_set_opacity(v->arenaitem, SP_SCALE24_TO_FLOAT(object->style->opacity.value));
623 nr_arena_item_set_visible(v->arenaitem, !item->isHidden());
624 }
625 }
626 }
628 // Update libavoid with item geometry (for connector routing).
629 item->avoidRef->handleSettingChange();
630 }
632 static Inkscape::XML::Node *
633 sp_item_write(SPObject *const object, Inkscape::XML::Node *repr, guint flags)
634 {
635 SPItem *item = SP_ITEM(object);
637 gchar *c = sp_svg_transform_write(item->transform);
638 repr->setAttribute("transform", c);
639 g_free(c);
641 SPObject const *const parent = SP_OBJECT_PARENT(object);
642 /** \todo Can someone please document why this is conditional on having
643 * a parent? The only parentless thing I can think of is the top-level
644 * <svg> element (SPRoot). SPRoot is derived from SPGroup, and can have
645 * style. I haven't looked at callers.
646 */
647 if (parent) {
648 SPStyle const *const obj_style = SP_OBJECT_STYLE(object);
649 if (obj_style) {
650 gchar *s = sp_style_write_string(obj_style, SP_STYLE_FLAG_IFSET);
651 repr->setAttribute("style", ( *s ? s : NULL ));
652 g_free(s);
653 } else {
654 /** \todo I'm not sure what to do in this case. Bug #1165868
655 * suggests that it can arise, but the submitter doesn't know
656 * how to do so reliably. The main two options are either
657 * leave repr's style attribute unchanged, or explicitly clear it.
658 * Must also consider what to do with property attributes for
659 * the element; see below.
660 */
661 char const *style_str = repr->attribute("style");
662 if (!style_str) {
663 style_str = "NULL";
664 }
665 g_warning("Item's style is NULL; repr style attribute is %s", style_str);
666 }
668 /** \note We treat object->style as authoritative. Its effects have
669 * been written to the style attribute above; any properties that are
670 * unset we take to be deliberately unset (e.g. so that clones can
671 * override the property).
672 *
673 * Note that the below has an undesirable consequence of changing the
674 * appearance on renderers that lack CSS support (e.g. SVG tiny);
675 * possibly we should write property attributes instead of a style
676 * attribute.
677 */
678 sp_style_unset_property_attrs (object);
679 }
681 if (flags & SP_OBJECT_WRITE_EXT) {
682 repr->setAttribute("sodipodi:insensitive", ( item->sensitive ? NULL : "true" ));
683 if (item->transform_center_x != 0)
684 sp_repr_set_svg_double (repr, "inkscape:transform-center-x", item->transform_center_x);
685 else
686 repr->setAttribute ("inkscape:transform-center-x", NULL);
687 if (item->transform_center_y != 0)
688 sp_repr_set_svg_double (repr, "inkscape:transform-center-y", item->transform_center_y);
689 else
690 repr->setAttribute ("inkscape:transform-center-y", NULL);
691 }
693 if (item->clip_ref->getObject()) {
694 const gchar *value = g_strdup_printf ("url(%s)", item->clip_ref->getURI()->toString());
695 repr->setAttribute ("clip-path", value);
696 g_free ((void *) value);
697 }
698 if (item->mask_ref->getObject()) {
699 const gchar *value = g_strdup_printf ("url(%s)", item->mask_ref->getURI()->toString());
700 repr->setAttribute ("mask", value);
701 g_free ((void *) value);
702 }
704 if (((SPObjectClass *) (parent_class))->write) {
705 ((SPObjectClass *) (parent_class))->write(object, repr, flags);
706 }
708 return repr;
709 }
711 NR::Maybe<NR::Rect> SPItem::getBounds(NR::Matrix const &transform,
712 SPItem::BBoxType type,
713 unsigned int dkey) const
714 {
715 NRRect r;
716 sp_item_invoke_bbox_full(this, &r, transform, type, TRUE);
717 if (nr_rect_d_test_empty(&r)) {
718 return NR::Nothing();
719 } else {
720 return NR::Rect(r);
721 }
722 }
724 void
725 sp_item_invoke_bbox(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const clear)
726 {
727 sp_item_invoke_bbox_full(item, bbox, transform, 0, clear);
728 }
730 /** Calls \a item's subclass' bounding box method; clips it by the bbox of clippath, if any; and
731 * unions the resulting bbox with \a bbox. If \a clear is true, empties \a bbox first. Passes the
732 * transform and the flags to the actual bbox methods. Note that many of subclasses (e.g. groups,
733 * clones), in turn, call this function in their bbox methods. */
734 void
735 sp_item_invoke_bbox_full(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags, unsigned const clear)
736 {
737 g_assert(item != NULL);
738 g_assert(SP_IS_ITEM(item));
739 g_assert(bbox != NULL);
741 if (clear) {
742 bbox->x0 = bbox->y0 = 1e18;
743 bbox->x1 = bbox->y1 = -1e18;
744 }
746 NRRect this_bbox;
747 this_bbox.x0 = this_bbox.y0 = 1e18;
748 this_bbox.x1 = this_bbox.y1 = -1e18;
750 // call the subclass method
751 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->bbox) {
752 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->bbox(item, &this_bbox, transform, flags);
753 }
755 // crop the bbox by clip path, if any
756 if (item->clip_ref->getObject()) {
757 NRRect b;
758 sp_clippath_get_bbox(SP_CLIPPATH(item->clip_ref->getObject()), &b, transform, flags);
759 nr_rect_d_intersect (&this_bbox, &this_bbox, &b);
760 }
762 // if non-empty (with some tolerance - ?) union this_bbox with the bbox we've got passed
763 if ( fabs(this_bbox.x1-this_bbox.x0) > -0.00001 && fabs(this_bbox.y1-this_bbox.y0) > -0.00001 ) {
764 nr_rect_d_union (bbox, bbox, &this_bbox);
765 }
766 }
768 unsigned sp_item_pos_in_parent(SPItem *item)
769 {
770 g_assert(item != NULL);
771 g_assert(SP_IS_ITEM(item));
773 SPObject *parent = SP_OBJECT_PARENT(item);
774 g_assert(parent != NULL);
775 g_assert(SP_IS_OBJECT(parent));
777 SPObject *object = SP_OBJECT(item);
779 unsigned pos=0;
780 for ( SPObject *iter = sp_object_first_child(parent) ; iter ; iter = SP_OBJECT_NEXT(iter)) {
781 if ( iter == object ) {
782 return pos;
783 }
784 if (SP_IS_ITEM(iter)) {
785 pos++;
786 }
787 }
789 g_assert_not_reached();
790 return 0;
791 }
793 void
794 sp_item_bbox_desktop(SPItem *item, NRRect *bbox)
795 {
796 g_assert(item != NULL);
797 g_assert(SP_IS_ITEM(item));
798 g_assert(bbox != NULL);
800 sp_item_invoke_bbox(item, bbox, sp_item_i2d_affine(item), TRUE);
801 }
803 NR::Rect sp_item_bbox_desktop(SPItem *item)
804 {
805 NRRect ret;
806 sp_item_invoke_bbox(item, &ret, sp_item_i2d_affine(item), TRUE);
807 return NR::Rect(ret);
808 }
810 static void sp_item_private_snappoints(SPItem const *item, SnapPointsIter p)
811 {
812 NR::Maybe<NR::Rect> bbox = item->getBounds(sp_item_i2d_affine(item));
813 /* Just a pair of opposite corners of the bounding box suffices given that we don't yet
814 support angled guide lines. */
816 if (bbox) {
817 *p = bbox->min();
818 *p = bbox->max();
819 }
820 }
822 void sp_item_snappoints(SPItem const *item, SnapPointsIter p)
823 {
824 g_assert (item != NULL);
825 g_assert (SP_IS_ITEM(item));
827 SPItemClass const &item_class = *(SPItemClass const *) G_OBJECT_GET_CLASS(item);
828 if (item_class.snappoints) {
829 item_class.snappoints(item, p);
830 }
831 }
833 void
834 sp_item_invoke_print(SPItem *item, SPPrintContext *ctx)
835 {
836 if (!item->isHidden()) {
837 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->print) {
838 if (!item->transform.test_identity()
839 || SP_OBJECT_STYLE(item)->opacity.value != SP_SCALE24_MAX)
840 {
841 sp_print_bind(ctx, item->transform, SP_SCALE24_TO_FLOAT(SP_OBJECT_STYLE(item)->opacity.value));
842 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->print(item, ctx);
843 sp_print_release(ctx);
844 } else {
845 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->print(item, ctx);
846 }
847 }
848 }
849 }
851 static gchar *
852 sp_item_private_description(SPItem *item)
853 {
854 return g_strdup(_("Object"));
855 }
857 /**
858 * Returns a string suitable for status bar, formatted in pango markup language.
859 *
860 * Must be freed by caller.
861 */
862 gchar *
863 sp_item_description(SPItem *item)
864 {
865 g_assert(item != NULL);
866 g_assert(SP_IS_ITEM(item));
868 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->description) {
869 gchar *s = ((SPItemClass *) G_OBJECT_GET_CLASS(item))->description(item);
870 if (s && item->clip_ref->getObject()) {
871 gchar *snew = g_strdup_printf (_("%s; <i>clipped</i>"), s);
872 g_free (s);
873 s = snew;
874 }
875 if (s && item->mask_ref->getObject()) {
876 gchar *snew = g_strdup_printf (_("%s; <i>masked</i>"), s);
877 g_free (s);
878 s = snew;
879 }
880 return s;
881 }
883 g_assert_not_reached();
884 return NULL;
885 }
887 /**
888 * Allocates unique integer keys.
889 * \param numkeys Number of keys required.
890 * \return First allocated key; hence if the returned key is n
891 * you can use n, n + 1, ..., n + (numkeys - 1)
892 */
893 unsigned
894 sp_item_display_key_new(unsigned numkeys)
895 {
896 static unsigned dkey = 0;
898 dkey += numkeys;
900 return dkey - numkeys;
901 }
903 NRArenaItem *
904 sp_item_invoke_show(SPItem *item, NRArena *arena, unsigned key, unsigned flags)
905 {
906 g_assert(item != NULL);
907 g_assert(SP_IS_ITEM(item));
908 g_assert(arena != NULL);
909 g_assert(NR_IS_ARENA(arena));
911 NRArenaItem *ai = NULL;
912 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->show) {
913 ai = ((SPItemClass *) G_OBJECT_GET_CLASS(item))->show(item, arena, key, flags);
914 }
916 if (ai != NULL) {
917 item->display = sp_item_view_new_prepend(item->display, item, flags, key, ai);
918 nr_arena_item_set_transform(ai, item->transform);
919 nr_arena_item_set_opacity(ai, SP_SCALE24_TO_FLOAT(SP_OBJECT_STYLE(item)->opacity.value));
920 nr_arena_item_set_visible(ai, !item->isHidden());
921 nr_arena_item_set_sensitive(ai, item->sensitive);
922 if (item->clip_ref->getObject()) {
923 SPClipPath *cp = item->clip_ref->getObject();
925 if (!item->display->arenaitem->key) {
926 NR_ARENA_ITEM_SET_KEY(item->display->arenaitem, sp_item_display_key_new(3));
927 }
928 int clip_key = NR_ARENA_ITEM_GET_KEY(item->display->arenaitem);
930 // Show and set clip
931 NRArenaItem *ac = sp_clippath_show(cp, arena, clip_key);
932 nr_arena_item_set_clip(ai, ac);
933 nr_arena_item_unref(ac);
935 // Update bbox, in case the clip uses bbox units
936 NRRect bbox;
937 sp_item_invoke_bbox(item, &bbox, NR::identity(), TRUE);
938 sp_clippath_set_bbox(SP_CLIPPATH(cp), clip_key, &bbox);
939 SP_OBJECT(cp)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
940 }
941 if (item->mask_ref->getObject()) {
942 SPMask *mask = item->mask_ref->getObject();
944 if (!item->display->arenaitem->key) {
945 NR_ARENA_ITEM_SET_KEY(item->display->arenaitem, sp_item_display_key_new(3));
946 }
947 int mask_key = NR_ARENA_ITEM_GET_KEY(item->display->arenaitem);
949 // Show and set mask
950 NRArenaItem *ac = sp_mask_show(mask, arena, mask_key);
951 nr_arena_item_set_mask(ai, ac);
952 nr_arena_item_unref(ac);
954 // Update bbox, in case the mask uses bbox units
955 NRRect bbox;
956 sp_item_invoke_bbox(item, &bbox, NR::identity(), TRUE);
957 sp_mask_set_bbox(SP_MASK(mask), mask_key, &bbox);
958 SP_OBJECT(mask)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
959 }
960 NR_ARENA_ITEM_SET_DATA(ai, item);
961 }
963 return ai;
964 }
966 void
967 sp_item_invoke_hide(SPItem *item, unsigned key)
968 {
969 g_assert(item != NULL);
970 g_assert(SP_IS_ITEM(item));
972 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->hide) {
973 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->hide(item, key);
974 }
976 SPItemView *ref = NULL;
977 SPItemView *v = item->display;
978 while (v != NULL) {
979 SPItemView *next = v->next;
980 if (v->key == key) {
981 if (item->clip_ref->getObject()) {
982 sp_clippath_hide(item->clip_ref->getObject(), NR_ARENA_ITEM_GET_KEY(v->arenaitem));
983 nr_arena_item_set_clip(v->arenaitem, NULL);
984 }
985 if (item->mask_ref->getObject()) {
986 sp_mask_hide(item->mask_ref->getObject(), NR_ARENA_ITEM_GET_KEY(v->arenaitem));
987 nr_arena_item_set_mask(v->arenaitem, NULL);
988 }
989 if (!ref) {
990 item->display = v->next;
991 } else {
992 ref->next = v->next;
993 }
994 nr_arena_item_unparent(v->arenaitem);
995 nr_arena_item_unref(v->arenaitem);
996 g_free(v);
997 } else {
998 ref = v;
999 }
1000 v = next;
1001 }
1002 }
1004 // Adjusters
1006 void
1007 sp_item_adjust_pattern (SPItem *item, NR::Matrix const &postmul, bool set)
1008 {
1009 SPStyle *style = SP_OBJECT_STYLE (item);
1011 if (style && (style->fill.type == SP_PAINT_TYPE_PAINTSERVER)) {
1012 SPObject *server = SP_OBJECT_STYLE_FILL_SERVER (item);
1013 if (SP_IS_PATTERN (server)) {
1014 SPPattern *pattern = sp_pattern_clone_if_necessary (item, SP_PATTERN (server), "fill");
1015 sp_pattern_transform_multiply (pattern, postmul, set);
1016 }
1017 }
1019 if (style && (style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)) {
1020 SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER (item);
1021 if (SP_IS_PATTERN (server)) {
1022 SPPattern *pattern = sp_pattern_clone_if_necessary (item, SP_PATTERN (server), "stroke");
1023 sp_pattern_transform_multiply (pattern, postmul, set);
1024 }
1025 }
1027 }
1029 void
1030 sp_item_adjust_gradient (SPItem *item, NR::Matrix const &postmul, bool set)
1031 {
1032 SPStyle *style = SP_OBJECT_STYLE (item);
1034 if (style && (style->fill.type == SP_PAINT_TYPE_PAINTSERVER)) {
1035 SPObject *server = SP_OBJECT_STYLE_FILL_SERVER(item);
1036 if (SP_IS_GRADIENT (server)) {
1038 /**
1039 * \note Bbox units for a gradient are generally a bad idea because
1040 * with them, you cannot preserve the relative position of the
1041 * object and its gradient after rotation or skew. So now we
1042 * convert them to userspace units which are easy to keep in sync
1043 * just by adding the object's transform to gradientTransform.
1044 * \todo FIXME: convert back to bbox units after transforming with
1045 * the item, so as to preserve the original units.
1046 */
1047 SPGradient *gradient = sp_gradient_convert_to_userspace (SP_GRADIENT (server), item, "fill");
1049 sp_gradient_transform_multiply (gradient, postmul, set);
1050 }
1051 }
1053 if (style && (style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)) {
1054 SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER(item);
1055 if (SP_IS_GRADIENT (server)) {
1056 SPGradient *gradient = sp_gradient_convert_to_userspace (SP_GRADIENT (server), item, "stroke");
1057 sp_gradient_transform_multiply (gradient, postmul, set);
1058 }
1059 }
1060 }
1062 void
1063 sp_item_adjust_stroke (SPItem *item, gdouble ex)
1064 {
1065 SPStyle *style = SP_OBJECT_STYLE (item);
1067 if (style && style->stroke.type != SP_PAINT_TYPE_NONE && !NR_DF_TEST_CLOSE (ex, 1.0, NR_EPSILON)) {
1069 style->stroke_width.computed *= ex;
1070 style->stroke_width.set = TRUE;
1072 if (style->stroke_dash.n_dash != 0) {
1073 int i;
1074 for (i = 0; i < style->stroke_dash.n_dash; i++) {
1075 style->stroke_dash.dash[i] *= ex;
1076 }
1077 style->stroke_dash.offset *= ex;
1078 }
1080 SP_OBJECT(item)->updateRepr();
1081 }
1082 }
1084 /**
1085 * Find out the inverse of previous transform of an item (from its repr)
1086 */
1087 NR::Matrix
1088 sp_item_transform_repr (SPItem *item)
1089 {
1090 NR::Matrix t_old(NR::identity());
1091 gchar const *t_attr = SP_OBJECT_REPR(item)->attribute("transform");
1092 if (t_attr) {
1093 NR::Matrix t;
1094 if (sp_svg_transform_read(t_attr, &t)) {
1095 t_old = t;
1096 }
1097 }
1099 return t_old;
1100 }
1103 /**
1104 * Recursively scale stroke width in \a item and its children by \a expansion.
1105 */
1106 void
1107 sp_item_adjust_stroke_width_recursive(SPItem *item, double expansion)
1108 {
1109 sp_item_adjust_stroke (item, expansion);
1111 for (SPObject *o = SP_OBJECT(item)->children; o != NULL; o = o->next) {
1112 if (SP_IS_ITEM(o))
1113 sp_item_adjust_stroke_width_recursive(SP_ITEM(o), expansion);
1114 }
1115 }
1117 /**
1118 * Recursively adjust rx and ry of rects.
1119 */
1120 void
1121 sp_item_adjust_rects_recursive(SPItem *item, NR::Matrix advertized_transform)
1122 {
1123 if (SP_IS_RECT (item)) {
1124 sp_rect_compensate_rxry (SP_RECT(item), advertized_transform);
1125 }
1127 for (SPObject *o = SP_OBJECT(item)->children; o != NULL; o = o->next) {
1128 if (SP_IS_ITEM(o))
1129 sp_item_adjust_rects_recursive(SP_ITEM(o), advertized_transform);
1130 }
1131 }
1133 /**
1134 * Recursively compensate pattern or gradient transform.
1135 */
1136 void
1137 sp_item_adjust_paint_recursive (SPItem *item, NR::Matrix advertized_transform, NR::Matrix t_ancestors, bool is_pattern)
1138 {
1139 // A clone must not touch the style (it's that of its parent!) and has no children, so quit now
1140 if (item && SP_IS_USE(item))
1141 return;
1143 // _Before_ full pattern/gradient transform: t_paint * t_item * t_ancestors
1144 // _After_ full pattern/gradient transform: t_paint_new * t_item * t_ancestors * advertised_transform
1145 // By equating these two expressions we get t_paint_new = t_paint * paint_delta, where:
1146 NR::Matrix t_item = sp_item_transform_repr (item);
1147 NR::Matrix paint_delta = t_item * t_ancestors * advertized_transform * t_ancestors.inverse() * t_item.inverse();
1149 if (is_pattern)
1150 sp_item_adjust_pattern (item, paint_delta);
1151 else
1152 sp_item_adjust_gradient (item, paint_delta);
1154 // Within text, we do not fork gradients, and so must not recurse to avoid double compensation
1155 if (item && SP_IS_TEXT(item))
1156 return;
1158 for (SPObject *o = SP_OBJECT(item)->children; o != NULL; o = o->next) {
1159 if (SP_IS_ITEM(o)) {
1160 // At the level of the transformed item, t_ancestors is identity;
1161 // below it, it is the accmmulated chain of transforms from this level to the top level
1162 sp_item_adjust_paint_recursive (SP_ITEM(o), advertized_transform, t_item * t_ancestors, is_pattern);
1163 }
1164 }
1165 }
1167 /**
1168 * A temporary wrapper for the next function accepting the NRMatrix
1169 * instead of NR::Matrix
1170 */
1171 void
1172 sp_item_write_transform(SPItem *item, Inkscape::XML::Node *repr, NRMatrix const *transform, NR::Matrix const *adv)
1173 {
1174 if (transform == NULL)
1175 sp_item_write_transform(item, repr, NR::identity(), adv);
1176 else
1177 sp_item_write_transform(item, repr, NR::Matrix (transform), adv);
1178 }
1180 /**
1181 * Set a new transform on an object.
1182 *
1183 * Compensate for stroke scaling and gradient/pattern fill transform, if
1184 * necessary. Call the object's set_transform method if transforms are
1185 * stored optimized. Send _transformed_signal. Invoke _write method so that
1186 * the repr is updated with the new transform.
1187 */
1188 void
1189 sp_item_write_transform(SPItem *item, Inkscape::XML::Node *repr, NR::Matrix const &transform, NR::Matrix const *adv, bool compensate)
1190 {
1191 g_return_if_fail(item != NULL);
1192 g_return_if_fail(SP_IS_ITEM(item));
1193 g_return_if_fail(repr != NULL);
1195 // calculate the relative transform, if not given by the adv attribute
1196 NR::Matrix advertized_transform;
1197 if (adv != NULL) {
1198 advertized_transform = *adv;
1199 } else {
1200 advertized_transform = sp_item_transform_repr (item).inverse() * transform;
1201 }
1203 if (compensate) {
1205 // recursively compensate for stroke scaling, depending on user preference
1206 if (prefs_get_int_attribute("options.transform", "stroke", 1) == 0) {
1207 double const expansion = 1. / NR::expansion(advertized_transform);
1208 sp_item_adjust_stroke_width_recursive(item, expansion);
1209 }
1211 // recursively compensate rx/ry of a rect if requested
1212 if (prefs_get_int_attribute("options.transform", "rectcorners", 1) == 0) {
1213 sp_item_adjust_rects_recursive(item, advertized_transform);
1214 }
1216 // recursively compensate pattern fill if it's not to be transformed
1217 if (prefs_get_int_attribute("options.transform", "pattern", 1) == 0) {
1218 sp_item_adjust_paint_recursive (item, advertized_transform.inverse(), NR::identity(), true);
1219 }
1220 /// \todo FIXME: add the same else branch as for gradients below, to convert patterns to userSpaceOnUse as well
1221 /// recursively compensate gradient fill if it's not to be transformed
1222 if (prefs_get_int_attribute("options.transform", "gradient", 1) == 0) {
1223 sp_item_adjust_paint_recursive (item, advertized_transform.inverse(), NR::identity(), false);
1224 } else {
1225 // this converts the gradient/pattern fill/stroke, if any, to userSpaceOnUse; we need to do
1226 // it here _before_ the new transform is set, so as to use the pre-transform bbox
1227 sp_item_adjust_paint_recursive (item, NR::identity(), NR::identity(), false);
1228 }
1230 } // endif(compensate)
1232 gint preserve = prefs_get_int_attribute("options.preservetransform", "value", 0);
1233 NR::Matrix transform_attr (transform);
1234 if ( // run the object's set_transform (i.e. embed transform) only if:
1235 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->set_transform && // it does have a set_transform method
1236 !preserve && // user did not chose to preserve all transforms
1237 !item->clip_ref->getObject() && // the object does not have a clippath
1238 !item->mask_ref->getObject() && // the object does not have a mask
1239 !(!transform.is_translation() && SP_OBJECT_STYLE(item) && SP_OBJECT_STYLE(item)->filter.filter)
1240 // the object does not have a filter, or the transform is translation (which is supposed to not affect filters)
1241 ) {
1242 transform_attr = ((SPItemClass *) G_OBJECT_GET_CLASS(item))->set_transform(item, transform);
1243 }
1244 sp_item_set_item_transform(item, transform_attr);
1246 // Note: updateRepr comes before emitting the transformed signal since
1247 // it causes clone SPUse's copy of the original object to brought up to
1248 // date with the original. Otherwise, sp_use_bbox returns incorrect
1249 // values if called in code handling the transformed signal.
1250 SP_OBJECT(item)->updateRepr();
1252 // send the relative transform with a _transformed_signal
1253 item->_transformed_signal.emit(&advertized_transform, item);
1254 }
1256 gint
1257 sp_item_event(SPItem *item, SPEvent *event)
1258 {
1259 g_return_val_if_fail(item != NULL, FALSE);
1260 g_return_val_if_fail(SP_IS_ITEM(item), FALSE);
1261 g_return_val_if_fail(event != NULL, FALSE);
1263 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->event)
1264 return ((SPItemClass *) G_OBJECT_GET_CLASS(item))->event(item, event);
1266 return FALSE;
1267 }
1269 /**
1270 * Sets item private transform (not propagated to repr), without compensating stroke widths,
1271 * gradients, patterns as sp_item_write_transform does.
1272 */
1273 void
1274 sp_item_set_item_transform(SPItem *item, NR::Matrix const &transform)
1275 {
1276 g_return_if_fail(item != NULL);
1277 g_return_if_fail(SP_IS_ITEM(item));
1279 if (!matrix_equalp(transform, item->transform, NR_EPSILON)) {
1280 item->transform = transform;
1281 /* The SP_OBJECT_USER_MODIFIED_FLAG_B is used to mark the fact that it's only a
1282 transformation. It's apparently not used anywhere else. */
1283 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_USER_MODIFIED_FLAG_B);
1284 sp_item_rm_unsatisfied_cns(*item);
1285 }
1286 }
1289 /**
1290 * \pre \a ancestor really is an ancestor (\>=) of \a object, or NULL.
1291 * ("Ancestor (\>=)" here includes as far as \a object itself.)
1292 */
1293 NR::Matrix
1294 i2anc_affine(SPObject const *object, SPObject const *const ancestor) {
1295 NR::Matrix ret(NR::identity());
1296 g_return_val_if_fail(object != NULL, ret);
1298 /* stop at first non-renderable ancestor */
1299 while ( object != ancestor && SP_IS_ITEM(object) ) {
1300 if (SP_IS_ROOT(object)) {
1301 ret *= SP_ROOT(object)->c2p;
1302 }
1303 ret *= SP_ITEM(object)->transform;
1304 object = SP_OBJECT_PARENT(object);
1305 }
1306 return ret;
1307 }
1309 NR::Matrix
1310 i2i_affine(SPObject const *src, SPObject const *dest) {
1311 g_return_val_if_fail(src != NULL && dest != NULL, NR::identity());
1312 SPObject const *ancestor = src->nearestCommonAncestor(dest);
1313 return i2anc_affine(src, ancestor) / i2anc_affine(dest, ancestor);
1314 }
1316 NR::Matrix SPItem::getRelativeTransform(SPObject const *dest) const {
1317 return i2i_affine(this, dest);
1318 }
1320 /**
1321 * Returns the accumulated transformation of the item and all its ancestors, including root's viewport.
1322 * \pre (item != NULL) and SP_IS_ITEM(item).
1323 */
1324 NR::Matrix sp_item_i2doc_affine(SPItem const *item)
1325 {
1326 return i2anc_affine(item, NULL);
1327 }
1329 /**
1330 * Returns the accumulated transformation of the item and all its ancestors, but excluding root's viewport.
1331 * Used in path operations mostly.
1332 * \pre (item != NULL) and SP_IS_ITEM(item).
1333 */
1334 NR::Matrix sp_item_i2root_affine(SPItem const *item)
1335 {
1336 g_assert(item != NULL);
1337 g_assert(SP_IS_ITEM(item));
1339 NR::Matrix ret(NR::identity());
1340 g_assert(ret.test_identity());
1341 while ( NULL != SP_OBJECT_PARENT(item) ) {
1342 ret *= item->transform;
1343 item = SP_ITEM(SP_OBJECT_PARENT(item));
1344 }
1345 g_assert(SP_IS_ROOT(item));
1347 ret *= item->transform;
1349 return ret;
1350 }
1352 /* fixme: This is EVIL!!! */
1354 NR::Matrix sp_item_i2d_affine(SPItem const *item)
1355 {
1356 g_assert(item != NULL);
1357 g_assert(SP_IS_ITEM(item));
1359 NR::Matrix const ret( sp_item_i2doc_affine(item)
1360 * NR::scale(1, -1)
1361 * NR::translate(0, sp_document_height(SP_OBJECT_DOCUMENT(item))) );
1362 return ret;
1363 }
1365 // same as i2d but with i2root instead of i2doc
1366 NR::Matrix sp_item_i2r_affine(SPItem const *item)
1367 {
1368 g_assert(item != NULL);
1369 g_assert(SP_IS_ITEM(item));
1371 NR::Matrix const ret( sp_item_i2root_affine(item)
1372 * NR::scale(1, -1)
1373 * NR::translate(0, sp_document_height(SP_OBJECT_DOCUMENT(item))) );
1374 return ret;
1375 }
1377 /**
1378 * Converts a matrix \a m into the desktop coords of the \a item.
1379 * Will become a noop when we eliminate the coordinate flipping.
1380 */
1381 NR::Matrix matrix_to_desktop(NR::Matrix const m, SPItem const *item)
1382 {
1383 NR::Matrix const ret(m
1384 * NR::translate(0, -sp_document_height(SP_OBJECT_DOCUMENT(item)))
1385 * NR::scale(1, -1));
1386 return ret;
1387 }
1389 /**
1390 * Converts a matrix \a m from the desktop coords of the \a item.
1391 * Will become a noop when we eliminate the coordinate flipping.
1392 */
1393 NR::Matrix matrix_from_desktop(NR::Matrix const m, SPItem const *item)
1394 {
1395 NR::Matrix const ret(NR::scale(1, -1)
1396 * NR::translate(0, sp_document_height(SP_OBJECT_DOCUMENT(item)))
1397 * m);
1398 return ret;
1399 }
1401 void sp_item_set_i2d_affine(SPItem *item, NR::Matrix const &i2dt)
1402 {
1403 g_return_if_fail( item != NULL );
1404 g_return_if_fail( SP_IS_ITEM(item) );
1406 NR::Matrix dt2p; /* desktop to item parent transform */
1407 if (SP_OBJECT_PARENT(item)) {
1408 dt2p = sp_item_i2d_affine((SPItem *) SP_OBJECT_PARENT(item)).inverse();
1409 } else {
1410 dt2p = ( NR::translate(0, -sp_document_height(SP_OBJECT_DOCUMENT(item)))
1411 * NR::scale(1, -1) );
1412 }
1414 NR::Matrix const i2p( i2dt * dt2p );
1415 sp_item_set_item_transform(item, i2p);
1416 }
1419 NR::Matrix
1420 sp_item_dt2i_affine(SPItem const *item)
1421 {
1422 /* fixme: Implement the right way (Lauris) */
1423 return sp_item_i2d_affine(item).inverse();
1424 }
1426 /* Item views */
1428 static SPItemView *
1429 sp_item_view_new_prepend(SPItemView *list, SPItem *item, unsigned flags, unsigned key, NRArenaItem *arenaitem)
1430 {
1431 SPItemView *new_view;
1433 g_assert(item != NULL);
1434 g_assert(SP_IS_ITEM(item));
1435 g_assert(arenaitem != NULL);
1436 g_assert(NR_IS_ARENA_ITEM(arenaitem));
1438 new_view = g_new(SPItemView, 1);
1440 new_view->next = list;
1441 new_view->flags = flags;
1442 new_view->key = key;
1443 new_view->arenaitem = nr_arena_item_ref(arenaitem);
1445 return new_view;
1446 }
1448 static SPItemView *
1449 sp_item_view_list_remove(SPItemView *list, SPItemView *view)
1450 {
1451 if (view == list) {
1452 list = list->next;
1453 } else {
1454 SPItemView *prev;
1455 prev = list;
1456 while (prev->next != view) prev = prev->next;
1457 prev->next = view->next;
1458 }
1460 nr_arena_item_unref(view->arenaitem);
1461 g_free(view);
1463 return list;
1464 }
1466 /**
1467 * Return the arenaitem corresponding to the given item in the display
1468 * with the given key
1469 */
1470 NRArenaItem *
1471 sp_item_get_arenaitem(SPItem *item, unsigned key)
1472 {
1473 for ( SPItemView *iv = item->display ; iv ; iv = iv->next ) {
1474 if ( iv->key == key ) {
1475 return iv->arenaitem;
1476 }
1477 }
1479 return NULL;
1480 }
1482 int
1483 sp_item_repr_compare_position(SPItem *first, SPItem *second)
1484 {
1485 return sp_repr_compare_position(SP_OBJECT_REPR(first),
1486 SP_OBJECT_REPR(second));
1487 }
1489 SPItem *
1490 sp_item_first_item_child (SPObject *obj)
1491 {
1492 for ( SPObject *iter = sp_object_first_child(obj) ; iter ; iter = SP_OBJECT_NEXT(iter)) {
1493 if (SP_IS_ITEM (iter))
1494 return SP_ITEM (iter);
1495 }
1496 return NULL;
1497 }
1500 /*
1501 Local Variables:
1502 mode:c++
1503 c-file-style:"stroustrup"
1504 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1505 indent-tabs-mode:nil
1506 fill-column:99
1507 End:
1508 */
1509 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :