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 *
11 * Copyright (C) 2001-2005 authors
12 * Copyright (C) 2001 Ximian, Inc.
13 *
14 * Released under GNU GPL, read the file 'COPYING' for more information
15 */
17 /** \class SPItem
18 *
19 * SPItem is an abstract base class for all graphic (visible) SVG nodes. It
20 * is a subclass of SPObject, with great deal of specific functionality.
21 */
23 #ifdef HAVE_CONFIG_H
24 # include "config.h"
25 #endif
28 #include "sp-item.h"
29 #include "svg/svg.h"
30 #include "print.h"
31 #include "display/nr-arena.h"
32 #include "display/nr-arena-item.h"
33 #include "attributes.h"
34 #include "document.h"
35 #include "uri.h"
37 #include "style.h"
38 #include <glibmm/i18n.h>
39 #include "sp-root.h"
40 #include "sp-clippath.h"
41 #include "sp-mask.h"
42 #include "sp-rect.h"
43 #include "sp-use.h"
44 #include "sp-text.h"
45 #include "sp-item-rm-unsatisfied-cns.h"
46 #include "sp-pattern.h"
47 #include "sp-switch.h"
48 #include "gradient-chemistry.h"
49 #include "prefs-utils.h"
50 #include "conn-avoid-ref.h"
51 #include "conditions.h"
53 #include "libnr/nr-matrix-div.h"
54 #include "libnr/nr-matrix-fns.h"
55 #include "libnr/nr-matrix-scale-ops.h"
56 #include "libnr/nr-matrix-translate-ops.h"
57 #include "libnr/nr-scale-translate-ops.h"
58 #include "libnr/nr-translate-scale-ops.h"
59 #include "algorithms/find-last-if.h"
60 #include "util/reverse-list.h"
62 #include "xml/repr.h"
64 #define noSP_ITEM_DEBUG_IDLE
66 static void sp_item_class_init(SPItemClass *klass);
67 static void sp_item_init(SPItem *item);
69 static void sp_item_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
70 static void sp_item_release(SPObject *object);
71 static void sp_item_set(SPObject *object, unsigned key, gchar const *value);
72 static void sp_item_update(SPObject *object, SPCtx *ctx, guint flags);
73 static Inkscape::XML::Node *sp_item_write(SPObject *object, Inkscape::XML::Node *repr, guint flags);
75 static gchar *sp_item_private_description(SPItem *item);
76 static void sp_item_private_snappoints(SPItem const *item, SnapPointsIter p);
78 static SPItemView *sp_item_view_new_prepend(SPItemView *list, SPItem *item, unsigned flags, unsigned key, NRArenaItem *arenaitem);
79 static SPItemView *sp_item_view_list_remove(SPItemView *list, SPItemView *view);
81 static SPObjectClass *parent_class;
83 static void clip_ref_changed(SPObject *old_clip, SPObject *clip, SPItem *item);
84 static void mask_ref_changed(SPObject *old_clip, SPObject *clip, SPItem *item);
86 /**
87 * Registers SPItem class and returns its type number.
88 */
89 GType
90 sp_item_get_type(void)
91 {
92 static GType type = 0;
93 if (!type) {
94 GTypeInfo info = {
95 sizeof(SPItemClass),
96 NULL, NULL,
97 (GClassInitFunc) sp_item_class_init,
98 NULL, NULL,
99 sizeof(SPItem),
100 16,
101 (GInstanceInitFunc) sp_item_init,
102 NULL, /* value_table */
103 };
104 type = g_type_register_static(SP_TYPE_OBJECT, "SPItem", &info, (GTypeFlags)0);
105 }
106 return type;
107 }
109 /**
110 * SPItem vtable initialization.
111 */
112 static void
113 sp_item_class_init(SPItemClass *klass)
114 {
115 SPObjectClass *sp_object_class = (SPObjectClass *) klass;
117 parent_class = (SPObjectClass *)g_type_class_ref(SP_TYPE_OBJECT);
119 sp_object_class->build = sp_item_build;
120 sp_object_class->release = sp_item_release;
121 sp_object_class->set = sp_item_set;
122 sp_object_class->update = sp_item_update;
123 sp_object_class->write = sp_item_write;
125 klass->description = sp_item_private_description;
126 klass->snappoints = sp_item_private_snappoints;
127 }
129 /**
130 * Callback for SPItem object initialization.
131 */
132 static void
133 sp_item_init(SPItem *item)
134 {
135 item->init();
136 }
138 void SPItem::init() {
139 this->sensitive = TRUE;
141 this->transform_center_x = 0;
142 this->transform_center_y = 0;
144 this->_is_evaluated = true;
145 this->_evaluated_status = StatusUnknown;
147 this->transform = NR::identity();
149 this->display = NULL;
151 this->clip_ref = new SPClipPathReference(this);
152 {
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 cs1.connect(sl1);
156 }
158 this->mask_ref = new SPMaskReference(this);
159 sigc::signal<void, SPObject *, SPObject *> cs2=this->mask_ref->changedSignal();
160 sigc::slot2<void,SPObject*, SPObject *> sl2=sigc::bind(sigc::ptr_fun(mask_ref_changed), this);
161 cs2.connect(sl2);
163 if (!this->style) this->style = sp_style_new_from_object(this);
165 this->avoidRef = new SPAvoidRef(this);
167 new (&this->_transformed_signal) sigc::signal<void, NR::Matrix const *, SPItem *>();
168 }
170 bool SPItem::isVisibleAndUnlocked() const {
171 return (!isHidden() && !isLocked());
172 }
174 bool SPItem::isVisibleAndUnlocked(unsigned display_key) const {
175 return (!isHidden(display_key) && !isLocked());
176 }
178 bool SPItem::isLocked() const {
179 for (SPObject *o = SP_OBJECT(this); o != NULL; o = SP_OBJECT_PARENT(o)) {
180 if (SP_IS_ITEM(o) && !(SP_ITEM(o)->sensitive))
181 return true;
182 }
183 return false;
184 }
186 void SPItem::setLocked(bool locked) {
187 SP_OBJECT_REPR(this)->setAttribute("sodipodi:insensitive",
188 ( locked ? "1" : NULL ));
189 updateRepr();
190 }
192 bool SPItem::isHidden() const {
193 if (!isEvaluated())
194 return true;
195 return style->display.computed == SP_CSS_DISPLAY_NONE;
196 }
198 void SPItem::setHidden(bool hide) {
199 style->display.set = TRUE;
200 style->display.value = ( hide ? SP_CSS_DISPLAY_NONE : SP_CSS_DISPLAY_INLINE );
201 style->display.computed = style->display.value;
202 style->display.inherit = FALSE;
203 updateRepr();
204 }
206 bool SPItem::isHidden(unsigned display_key) const {
207 if (!isEvaluated())
208 return true;
209 for ( SPItemView *view(display) ; view ; view = view->next ) {
210 if ( view->key == display_key ) {
211 g_assert(view->arenaitem != NULL);
212 for ( NRArenaItem *arenaitem = view->arenaitem ;
213 arenaitem ; arenaitem = arenaitem->parent )
214 {
215 if (!arenaitem->visible) {
216 return true;
217 }
218 }
219 return false;
220 }
221 }
222 return true;
223 }
225 void SPItem::setEvaluated(bool evaluated) {
226 _is_evaluated = evaluated;
227 _evaluated_status = StatusSet;
228 }
230 void SPItem::resetEvaluated() {
231 if ( StatusCalculated == _evaluated_status ) {
232 _evaluated_status = StatusUnknown;
233 bool oldValue = _is_evaluated;
234 if ( oldValue != isEvaluated() ) {
235 requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
236 }
237 } if ( StatusSet == _evaluated_status ) {
238 SPObject const *const parent = SP_OBJECT_PARENT(this);
239 if (SP_IS_SWITCH(parent)) {
240 SP_SWITCH(parent)->resetChildEvaluated();
241 }
242 }
243 }
245 bool SPItem::isEvaluated() const {
246 if ( StatusUnknown == _evaluated_status ) {
247 _is_evaluated = sp_item_evaluate(this);
248 _evaluated_status = StatusCalculated;
249 }
250 return _is_evaluated;
251 }
253 /**
254 * Returns something suitable for the `Hide' checkbox in the Object Properties dialog box.
255 * Corresponds to setExplicitlyHidden.
256 */
257 bool
258 SPItem::isExplicitlyHidden() const
259 {
260 return (this->style->display.set
261 && this->style->display.value == SP_CSS_DISPLAY_NONE);
262 }
264 /**
265 * Sets the display CSS property to `hidden' if \a val is true,
266 * otherwise makes it unset
267 */
268 void
269 SPItem::setExplicitlyHidden(bool const val) {
270 this->style->display.set = val;
271 this->style->display.value = ( val ? SP_CSS_DISPLAY_NONE : SP_CSS_DISPLAY_INLINE );
272 this->style->display.computed = this->style->display.value;
273 this->updateRepr();
274 }
276 /**
277 * Sets the transform_center_x and transform_center_y properties to retain the rotation centre
278 */
279 void
280 SPItem::setCenter(NR::Point object_centre) {
281 NR::Rect bbox = invokeBbox(sp_item_i2d_affine(this));
282 if (!bbox.isEmpty()) {
283 transform_center_x = object_centre[NR::X] - bbox.midpoint()[NR::X];
284 if (fabs(transform_center_x) < 1e-5) // rounding error
285 transform_center_x = 0;
286 transform_center_y = object_centre[NR::Y] - bbox.midpoint()[NR::Y];
287 if (fabs(transform_center_y) < 1e-5) // rounding error
288 transform_center_y = 0;
289 }
290 }
292 void
293 SPItem::unsetCenter() {
294 transform_center_x = 0;
295 transform_center_y = 0;
296 }
298 bool SPItem::isCenterSet() {
299 return (transform_center_x != 0 || transform_center_y != 0);
300 }
302 NR::Point SPItem::getCenter() {
303 NR::Rect bbox = invokeBbox(sp_item_i2d_affine(this));
304 if (!bbox.isEmpty()) {
305 return bbox.midpoint() + NR::Point (this->transform_center_x, this->transform_center_y);
306 } else {
307 return NR::Point (0, 0); // something's wrong!
308 }
309 }
312 namespace {
314 bool is_item(SPObject const &object) {
315 return SP_IS_ITEM(&object);
316 }
318 }
320 void SPItem::raiseToTop() {
321 using Inkscape::Algorithms::find_last_if;
323 SPObject *topmost=find_last_if<SPObject::SiblingIterator>(
324 SP_OBJECT_NEXT(this), NULL, &is_item
325 );
326 if (topmost) {
327 Inkscape::XML::Node *repr=SP_OBJECT_REPR(this);
328 sp_repr_parent(repr)->changeOrder(repr, SP_OBJECT_REPR(topmost));
329 }
330 }
332 void SPItem::raiseOne() {
333 SPObject *next_higher=std::find_if<SPObject::SiblingIterator>(
334 SP_OBJECT_NEXT(this), NULL, &is_item
335 );
336 if (next_higher) {
337 Inkscape::XML::Node *repr=SP_OBJECT_REPR(this);
338 Inkscape::XML::Node *ref=SP_OBJECT_REPR(next_higher);
339 sp_repr_parent(repr)->changeOrder(repr, ref);
340 }
341 }
343 void SPItem::lowerOne() {
344 using Inkscape::Util::MutableList;
345 using Inkscape::Util::reverse_list;
347 MutableList<SPObject &> next_lower=std::find_if(
348 reverse_list<SPObject::SiblingIterator>(
349 SP_OBJECT_PARENT(this)->firstChild(), this
350 ),
351 MutableList<SPObject &>(),
352 &is_item
353 );
354 if (next_lower) {
355 ++next_lower;
356 Inkscape::XML::Node *repr=SP_OBJECT_REPR(this);
357 Inkscape::XML::Node *ref=( next_lower ? SP_OBJECT_REPR(&*next_lower) : NULL );
358 sp_repr_parent(repr)->changeOrder(repr, ref);
359 }
360 }
362 void SPItem::lowerToBottom() {
363 using Inkscape::Algorithms::find_last_if;
364 using Inkscape::Util::MutableList;
365 using Inkscape::Util::reverse_list;
367 MutableList<SPObject &> bottom=find_last_if(
368 reverse_list<SPObject::SiblingIterator>(
369 SP_OBJECT_PARENT(this)->firstChild(), this
370 ),
371 MutableList<SPObject &>(),
372 &is_item
373 );
374 if (bottom) {
375 ++bottom;
376 Inkscape::XML::Node *repr=SP_OBJECT_REPR(this);
377 Inkscape::XML::Node *ref=( bottom ? SP_OBJECT_REPR(&*bottom) : NULL );
378 sp_repr_parent(repr)->changeOrder(repr, ref);
379 }
380 }
382 static void
383 sp_item_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
384 {
385 sp_object_read_attr(object, "style");
386 sp_object_read_attr(object, "transform");
387 sp_object_read_attr(object, "clip-path");
388 sp_object_read_attr(object, "mask");
389 sp_object_read_attr(object, "sodipodi:insensitive");
390 sp_object_read_attr(object, "sodipodi:nonprintable");
391 sp_object_read_attr(object, "inkscape:transform-center-x");
392 sp_object_read_attr(object, "inkscape:transform-center-y");
393 sp_object_read_attr(object, "inkscape:connector-avoid");
395 if (((SPObjectClass *) (parent_class))->build) {
396 (* ((SPObjectClass *) (parent_class))->build)(object, document, repr);
397 }
398 }
400 static void
401 sp_item_release(SPObject *object)
402 {
403 SPItem *item = (SPItem *) object;
405 if (item->clip_ref) {
406 item->clip_ref->detach();
407 delete item->clip_ref;
408 item->clip_ref = NULL;
409 }
411 if (item->mask_ref) {
412 item->mask_ref->detach();
413 delete item->mask_ref;
414 item->mask_ref = NULL;
415 }
417 if (item->avoidRef) {
418 delete item->avoidRef;
419 item->avoidRef = NULL;
420 }
422 if (((SPObjectClass *) (parent_class))->release) {
423 ((SPObjectClass *) parent_class)->release(object);
424 }
426 while (item->display) {
427 nr_arena_item_unparent(item->display->arenaitem);
428 item->display = sp_item_view_list_remove(item->display, item->display);
429 }
431 item->_transformed_signal.~signal();
432 }
434 static void
435 sp_item_set(SPObject *object, unsigned key, gchar const *value)
436 {
437 SPItem *item = (SPItem *) object;
439 switch (key) {
440 case SP_ATTR_TRANSFORM: {
441 NR::Matrix t;
442 if (value && sp_svg_transform_read(value, &t)) {
443 sp_item_set_item_transform(item, t);
444 } else {
445 sp_item_set_item_transform(item, NR::identity());
446 }
447 break;
448 }
449 case SP_PROP_CLIP_PATH: {
450 gchar *uri = Inkscape::parse_css_url(value);
451 if (uri) {
452 try {
453 item->clip_ref->attach(Inkscape::URI(uri));
454 } catch (Inkscape::BadURIException &e) {
455 g_warning("%s", e.what());
456 item->clip_ref->detach();
457 }
458 g_free(uri);
459 } else {
460 item->clip_ref->detach();
461 }
463 break;
464 }
465 case SP_PROP_MASK: {
466 gchar *uri=Inkscape::parse_css_url(value);
467 if (uri) {
468 try {
469 item->mask_ref->attach(Inkscape::URI(uri));
470 } catch (Inkscape::BadURIException &e) {
471 g_warning("%s", e.what());
472 item->mask_ref->detach();
473 }
474 g_free(uri);
475 } else {
476 item->mask_ref->detach();
477 }
479 break;
480 }
481 case SP_ATTR_SODIPODI_INSENSITIVE:
482 item->sensitive = !value;
483 for (SPItemView *v = item->display; v != NULL; v = v->next) {
484 nr_arena_item_set_sensitive(v->arenaitem, item->sensitive);
485 }
486 break;
487 case SP_ATTR_STYLE:
488 sp_style_read_from_object(object->style, object);
489 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
490 break;
491 case SP_ATTR_CONNECTOR_AVOID:
492 item->avoidRef->setAvoid(value);
493 break;
494 case SP_ATTR_TRANSFORM_CENTER_X:
495 if (value) {
496 item->transform_center_x = g_strtod(value, NULL);
497 } else {
498 item->transform_center_x = 0;
499 }
500 break;
501 case SP_ATTR_TRANSFORM_CENTER_Y:
502 if (value) {
503 item->transform_center_y = g_strtod(value, NULL);
504 } else {
505 item->transform_center_y = 0;
506 }
507 break;
508 case SP_PROP_SYSTEM_LANGUAGE:
509 case SP_PROP_REQUIRED_FEATURES:
510 case SP_PROP_REQUIRED_EXTENSIONS:
511 {
512 item->resetEvaluated();
513 // pass to default handler
514 }
515 default:
516 if (SP_ATTRIBUTE_IS_CSS(key)) {
517 sp_style_read_from_object(object->style, object);
518 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
519 } else {
520 if (((SPObjectClass *) (parent_class))->set) {
521 (* ((SPObjectClass *) (parent_class))->set)(object, key, value);
522 }
523 }
524 break;
525 }
526 }
528 static void
529 clip_ref_changed(SPObject *old_clip, SPObject *clip, SPItem *item)
530 {
531 if (old_clip) {
532 SPItemView *v;
533 /* Hide clippath */
534 for (v = item->display; v != NULL; v = v->next) {
535 sp_clippath_hide(SP_CLIPPATH(old_clip), NR_ARENA_ITEM_GET_KEY(v->arenaitem));
536 nr_arena_item_set_clip(v->arenaitem, NULL);
537 }
538 }
539 if (SP_IS_CLIPPATH(clip)) {
540 NRRect bbox;
541 sp_item_invoke_bbox(item, &bbox, NR::identity(), TRUE);
542 for (SPItemView *v = item->display; v != NULL; v = v->next) {
543 if (!v->arenaitem->key) {
544 NR_ARENA_ITEM_SET_KEY(v->arenaitem, sp_item_display_key_new(3));
545 }
546 NRArenaItem *ai = sp_clippath_show(SP_CLIPPATH(clip),
547 NR_ARENA_ITEM_ARENA(v->arenaitem),
548 NR_ARENA_ITEM_GET_KEY(v->arenaitem));
549 nr_arena_item_set_clip(v->arenaitem, ai);
550 nr_arena_item_unref(ai);
551 sp_clippath_set_bbox(SP_CLIPPATH(clip), NR_ARENA_ITEM_GET_KEY(v->arenaitem), &bbox);
552 SP_OBJECT(clip)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
553 }
554 }
555 }
557 static void
558 mask_ref_changed(SPObject *old_mask, SPObject *mask, SPItem *item)
559 {
560 if (old_mask) {
561 /* Hide mask */
562 for (SPItemView *v = item->display; v != NULL; v = v->next) {
563 sp_mask_hide(SP_MASK(old_mask), NR_ARENA_ITEM_GET_KEY(v->arenaitem));
564 nr_arena_item_set_mask(v->arenaitem, NULL);
565 }
566 }
567 if (SP_IS_MASK(mask)) {
568 NRRect bbox;
569 sp_item_invoke_bbox(item, &bbox, NR::identity(), TRUE);
570 for (SPItemView *v = item->display; v != NULL; v = v->next) {
571 if (!v->arenaitem->key) {
572 NR_ARENA_ITEM_SET_KEY(v->arenaitem, sp_item_display_key_new(3));
573 }
574 NRArenaItem *ai = sp_mask_show(SP_MASK(mask),
575 NR_ARENA_ITEM_ARENA(v->arenaitem),
576 NR_ARENA_ITEM_GET_KEY(v->arenaitem));
577 nr_arena_item_set_mask(v->arenaitem, ai);
578 nr_arena_item_unref(ai);
579 sp_mask_set_bbox(SP_MASK(mask), NR_ARENA_ITEM_GET_KEY(v->arenaitem), &bbox);
580 SP_OBJECT(mask)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
581 }
582 }
583 }
585 static void
586 sp_item_update(SPObject *object, SPCtx *ctx, guint flags)
587 {
588 SPItem *item = SP_ITEM(object);
590 if (((SPObjectClass *) (parent_class))->update)
591 (* ((SPObjectClass *) (parent_class))->update)(object, ctx, flags);
593 if (flags & (SP_OBJECT_CHILD_MODIFIED_FLAG | SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG)) {
594 if (flags & SP_OBJECT_MODIFIED_FLAG) {
595 for (SPItemView *v = item->display; v != NULL; v = v->next) {
596 nr_arena_item_set_transform(v->arenaitem, item->transform);
597 }
598 }
600 SPClipPath *clip_path = item->clip_ref->getObject();
601 SPMask *mask = item->mask_ref->getObject();
603 if ( clip_path || mask ) {
604 NRRect bbox;
605 sp_item_invoke_bbox(item, &bbox, NR::identity(), TRUE);
606 if (clip_path) {
607 for (SPItemView *v = item->display; v != NULL; v = v->next) {
608 sp_clippath_set_bbox(clip_path, NR_ARENA_ITEM_GET_KEY(v->arenaitem), &bbox);
609 }
610 }
611 if (mask) {
612 for (SPItemView *v = item->display; v != NULL; v = v->next) {
613 sp_mask_set_bbox(mask, NR_ARENA_ITEM_GET_KEY(v->arenaitem), &bbox);
614 }
615 }
616 }
618 if (flags & SP_OBJECT_STYLE_MODIFIED_FLAG) {
619 for (SPItemView *v = item->display; v != NULL; v = v->next) {
620 nr_arena_item_set_opacity(v->arenaitem, SP_SCALE24_TO_FLOAT(object->style->opacity.value));
621 nr_arena_item_set_visible(v->arenaitem, !item->isHidden());
622 }
623 }
624 }
626 // Update libavoid with item geometry (for connector routing).
627 item->avoidRef->handleSettingChange();
628 }
630 static Inkscape::XML::Node *
631 sp_item_write(SPObject *const object, Inkscape::XML::Node *repr, guint flags)
632 {
633 SPItem *item = SP_ITEM(object);
635 gchar c[256];
636 if (sp_svg_transform_write(c, 256, item->transform)) {
637 repr->setAttribute("transform", c);
638 } else {
639 repr->setAttribute("transform", NULL);
640 }
642 SPObject const *const parent = SP_OBJECT_PARENT(object);
643 /** \todo Can someone please document why this is conditional on having
644 * a parent? The only parentless thing I can think of is the top-level
645 * <svg> element (SPRoot). SPRoot is derived from SPGroup, and can have
646 * style. I haven't looked at callers.
647 */
648 if (parent) {
649 SPStyle const *const obj_style = SP_OBJECT_STYLE(object);
650 if (obj_style) {
651 gchar *s = sp_style_write_string(obj_style, SP_STYLE_FLAG_IFSET);
652 repr->setAttribute("style", ( *s ? s : NULL ));
653 g_free(s);
654 } else {
655 /** \todo I'm not sure what to do in this case. Bug #1165868
656 * suggests that it can arise, but the submitter doesn't know
657 * how to do so reliably. The main two options are either
658 * leave repr's style attribute unchanged, or explicitly clear it.
659 * Must also consider what to do with property attributes for
660 * the element; see below.
661 */
662 char const *style_str = repr->attribute("style");
663 if (!style_str) {
664 style_str = "NULL";
665 }
666 g_warning("Item's style is NULL; repr style attribute is %s", style_str);
667 }
669 /** \note We treat object->style as authoritative. Its effects have
670 * been written to the style attribute above; any properties that are
671 * unset we take to be deliberately unset (e.g. so that clones can
672 * override the property).
673 *
674 * Note that the below has an undesirable consequence of changing the
675 * appearance on renderers that lack CSS support (e.g. SVG tiny);
676 * possibly we should write property attributes instead of a style
677 * attribute.
678 */
679 sp_style_unset_property_attrs (object);
680 }
682 if (flags & SP_OBJECT_WRITE_EXT) {
683 repr->setAttribute("sodipodi:insensitive", ( item->sensitive ? NULL : "true" ));
684 if (item->transform_center_x != 0)
685 sp_repr_set_svg_double (repr, "inkscape:transform-center-x", item->transform_center_x);
686 else
687 repr->setAttribute ("inkscape:transform-center-x", NULL);
688 if (item->transform_center_y != 0)
689 sp_repr_set_svg_double (repr, "inkscape:transform-center-y", item->transform_center_y);
690 else
691 repr->setAttribute ("inkscape:transform-center-y", NULL);
692 }
694 if (item->clip_ref->getObject()) {
695 const gchar *value = g_strdup_printf ("url(%s)", item->clip_ref->getURI()->toString());
696 repr->setAttribute ("clip-path", value);
697 g_free ((void *) value);
698 }
699 if (item->mask_ref->getObject()) {
700 const gchar *value = g_strdup_printf ("url(%s)", item->mask_ref->getURI()->toString());
701 repr->setAttribute ("mask", value);
702 g_free ((void *) value);
703 }
705 if (((SPObjectClass *) (parent_class))->write) {
706 ((SPObjectClass *) (parent_class))->write(object, repr, flags);
707 }
709 return repr;
710 }
712 NR::Rect SPItem::invokeBbox(NR::Matrix const &transform) const
713 {
714 NRRect r;
715 sp_item_invoke_bbox_full(this, &r, transform, 0, TRUE);
716 return NR::Rect(r);
717 }
719 void
720 sp_item_invoke_bbox(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const clear)
721 {
722 sp_item_invoke_bbox_full(item, bbox, transform, 0, clear);
723 }
725 /** Calls \a item's subclass' bounding box method; clips it by the bbox of clippath, if any; and
726 * unions the resulting bbox with \a bbox. If \a clear is true, empties \a bbox first. Passes the
727 * transform and the flags to the actual bbox methods. Note that many of subclasses (e.g. groups,
728 * clones), in turn, call this function in their bbox methods. */
729 void
730 sp_item_invoke_bbox_full(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags, unsigned const clear)
731 {
732 g_assert(item != NULL);
733 g_assert(SP_IS_ITEM(item));
734 g_assert(bbox != NULL);
736 if (clear) {
737 bbox->x0 = bbox->y0 = 1e18;
738 bbox->x1 = bbox->y1 = -1e18;
739 }
741 NRRect this_bbox;
742 this_bbox.x0 = this_bbox.y0 = 1e18;
743 this_bbox.x1 = this_bbox.y1 = -1e18;
745 // call the subclass method
746 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->bbox) {
747 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->bbox(item, &this_bbox, transform, flags);
748 }
750 // crop the bbox by clip path, if any
751 if (item->clip_ref->getObject()) {
752 NRRect b;
753 sp_clippath_get_bbox(SP_CLIPPATH(item->clip_ref->getObject()), &b, transform, flags);
754 nr_rect_d_intersect (&this_bbox, &this_bbox, &b);
755 }
757 // if non-empty (with some tolerance - ?) union this_bbox with the bbox we've got passed
758 if ( fabs(this_bbox.x1-this_bbox.x0) > -0.00001 && fabs(this_bbox.y1-this_bbox.y0) > -0.00001 ) {
759 nr_rect_d_union (bbox, bbox, &this_bbox);
760 }
761 }
763 unsigned sp_item_pos_in_parent(SPItem *item)
764 {
765 g_assert(item != NULL);
766 g_assert(SP_IS_ITEM(item));
768 SPObject *parent = SP_OBJECT_PARENT(item);
769 g_assert(parent != NULL);
770 g_assert(SP_IS_OBJECT(parent));
772 SPObject *object = SP_OBJECT(item);
774 unsigned pos=0;
775 for ( SPObject *iter = sp_object_first_child(parent) ; iter ; iter = SP_OBJECT_NEXT(iter)) {
776 if ( iter == object ) {
777 return pos;
778 }
779 if (SP_IS_ITEM(iter)) {
780 pos++;
781 }
782 }
784 g_assert_not_reached();
785 return 0;
786 }
788 void
789 sp_item_bbox_desktop(SPItem *item, NRRect *bbox)
790 {
791 g_assert(item != NULL);
792 g_assert(SP_IS_ITEM(item));
793 g_assert(bbox != NULL);
795 sp_item_invoke_bbox(item, bbox, sp_item_i2d_affine(item), TRUE);
796 }
798 NR::Rect sp_item_bbox_desktop(SPItem *item)
799 {
800 NRRect ret;
801 sp_item_invoke_bbox(item, &ret, sp_item_i2d_affine(item), TRUE);
802 return NR::Rect(ret);
803 }
805 static void sp_item_private_snappoints(SPItem const *item, SnapPointsIter p)
806 {
807 NR::Rect const bbox = item->invokeBbox(sp_item_i2d_affine(item));
808 /* Just a pair of opposite corners of the bounding box suffices given that we don't yet
809 support angled guide lines. */
811 *p = bbox.min();
812 *p = bbox.max();
813 }
815 void sp_item_snappoints(SPItem const *item, SnapPointsIter p)
816 {
817 g_assert (item != NULL);
818 g_assert (SP_IS_ITEM(item));
820 SPItemClass const &item_class = *(SPItemClass const *) G_OBJECT_GET_CLASS(item);
821 if (item_class.snappoints) {
822 item_class.snappoints(item, p);
823 }
824 }
826 void
827 sp_item_invoke_print(SPItem *item, SPPrintContext *ctx)
828 {
829 if (!item->isHidden()) {
830 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->print) {
831 if (!item->transform.test_identity()
832 || SP_OBJECT_STYLE(item)->opacity.value != SP_SCALE24_MAX)
833 {
834 sp_print_bind(ctx, item->transform, SP_SCALE24_TO_FLOAT(SP_OBJECT_STYLE(item)->opacity.value));
835 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->print(item, ctx);
836 sp_print_release(ctx);
837 } else {
838 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->print(item, ctx);
839 }
840 }
841 }
842 }
844 static gchar *
845 sp_item_private_description(SPItem *item)
846 {
847 return g_strdup(_("Object"));
848 }
850 /**
851 * Returns a string suitable for status bar, formatted in pango markup language.
852 *
853 * Must be freed by caller.
854 */
855 gchar *
856 sp_item_description(SPItem *item)
857 {
858 g_assert(item != NULL);
859 g_assert(SP_IS_ITEM(item));
861 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->description) {
862 gchar *s = ((SPItemClass *) G_OBJECT_GET_CLASS(item))->description(item);
863 if (s && item->clip_ref->getObject()) {
864 gchar *snew = g_strdup_printf ("%s; <i>clipped</i>", s);
865 g_free (s);
866 s = snew;
867 }
868 if (s && item->mask_ref->getObject()) {
869 gchar *snew = g_strdup_printf ("%s; <i>masked</i>", s);
870 g_free (s);
871 s = snew;
872 }
873 return s;
874 }
876 g_assert_not_reached();
877 return NULL;
878 }
880 /**
881 * Allocates unique integer keys.
882 * \param numkeys Number of keys required.
883 * \return First allocated key; hence if the returned key is n
884 * you can use n, n + 1, ..., n + (numkeys - 1)
885 */
886 unsigned
887 sp_item_display_key_new(unsigned numkeys)
888 {
889 static unsigned dkey = 0;
891 dkey += numkeys;
893 return dkey - numkeys;
894 }
896 NRArenaItem *
897 sp_item_invoke_show(SPItem *item, NRArena *arena, unsigned key, unsigned flags)
898 {
899 g_assert(item != NULL);
900 g_assert(SP_IS_ITEM(item));
901 g_assert(arena != NULL);
902 g_assert(NR_IS_ARENA(arena));
904 NRArenaItem *ai = NULL;
905 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->show) {
906 ai = ((SPItemClass *) G_OBJECT_GET_CLASS(item))->show(item, arena, key, flags);
907 }
909 if (ai != NULL) {
910 item->display = sp_item_view_new_prepend(item->display, item, flags, key, ai);
911 nr_arena_item_set_transform(ai, item->transform);
912 nr_arena_item_set_opacity(ai, SP_SCALE24_TO_FLOAT(SP_OBJECT_STYLE(item)->opacity.value));
913 nr_arena_item_set_visible(ai, !item->isHidden());
914 nr_arena_item_set_sensitive(ai, item->sensitive);
915 if (item->clip_ref->getObject()) {
916 SPClipPath *cp = item->clip_ref->getObject();
918 if (!item->display->arenaitem->key) {
919 NR_ARENA_ITEM_SET_KEY(item->display->arenaitem, sp_item_display_key_new(3));
920 }
921 int clip_key = NR_ARENA_ITEM_GET_KEY(item->display->arenaitem);
923 // Show and set clip
924 NRArenaItem *ac = sp_clippath_show(cp, arena, clip_key);
925 nr_arena_item_set_clip(ai, ac);
926 nr_arena_item_unref(ac);
928 // Update bbox, in case the clip uses bbox units
929 NRRect bbox;
930 sp_item_invoke_bbox(item, &bbox, NR::identity(), TRUE);
931 sp_clippath_set_bbox(SP_CLIPPATH(cp), clip_key, &bbox);
932 SP_OBJECT(cp)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
933 }
934 if (item->mask_ref->getObject()) {
935 SPMask *mask = item->mask_ref->getObject();
937 if (!item->display->arenaitem->key) {
938 NR_ARENA_ITEM_SET_KEY(item->display->arenaitem, sp_item_display_key_new(3));
939 }
940 int mask_key = NR_ARENA_ITEM_GET_KEY(item->display->arenaitem);
942 // Show and set mask
943 NRArenaItem *ac = sp_mask_show(mask, arena, mask_key);
944 nr_arena_item_set_mask(ai, ac);
945 nr_arena_item_unref(ac);
947 // Update bbox, in case the mask uses bbox units
948 NRRect bbox;
949 sp_item_invoke_bbox(item, &bbox, NR::identity(), TRUE);
950 sp_mask_set_bbox(SP_MASK(mask), mask_key, &bbox);
951 SP_OBJECT(mask)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
952 }
953 NR_ARENA_ITEM_SET_DATA(ai, item);
954 }
956 return ai;
957 }
959 void
960 sp_item_invoke_hide(SPItem *item, unsigned key)
961 {
962 g_assert(item != NULL);
963 g_assert(SP_IS_ITEM(item));
965 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->hide) {
966 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->hide(item, key);
967 }
969 SPItemView *ref = NULL;
970 SPItemView *v = item->display;
971 while (v != NULL) {
972 SPItemView *next = v->next;
973 if (v->key == key) {
974 if (item->clip_ref->getObject()) {
975 sp_clippath_hide(item->clip_ref->getObject(), NR_ARENA_ITEM_GET_KEY(v->arenaitem));
976 nr_arena_item_set_clip(v->arenaitem, NULL);
977 }
978 if (item->mask_ref->getObject()) {
979 sp_mask_hide(item->mask_ref->getObject(), NR_ARENA_ITEM_GET_KEY(v->arenaitem));
980 nr_arena_item_set_mask(v->arenaitem, NULL);
981 }
982 if (!ref) {
983 item->display = v->next;
984 } else {
985 ref->next = v->next;
986 }
987 nr_arena_item_unparent(v->arenaitem);
988 nr_arena_item_unref(v->arenaitem);
989 g_free(v);
990 } else {
991 ref = v;
992 }
993 v = next;
994 }
995 }
997 // Adjusters
999 void
1000 sp_item_adjust_pattern (SPItem *item, NR::Matrix const &postmul, bool set)
1001 {
1002 SPStyle *style = SP_OBJECT_STYLE (item);
1004 if (style && (style->fill.type == SP_PAINT_TYPE_PAINTSERVER)) {
1005 SPObject *server = SP_OBJECT_STYLE_FILL_SERVER (item);
1006 if (SP_IS_PATTERN (server)) {
1007 SPPattern *pattern = sp_pattern_clone_if_necessary (item, SP_PATTERN (server), "fill");
1008 sp_pattern_transform_multiply (pattern, postmul, set);
1009 }
1010 }
1012 if (style && (style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)) {
1013 SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER (item);
1014 if (SP_IS_PATTERN (server)) {
1015 SPPattern *pattern = sp_pattern_clone_if_necessary (item, SP_PATTERN (server), "stroke");
1016 sp_pattern_transform_multiply (pattern, postmul, set);
1017 }
1018 }
1020 }
1022 void
1023 sp_item_adjust_gradient (SPItem *item, NR::Matrix const &postmul, bool set)
1024 {
1025 SPStyle *style = SP_OBJECT_STYLE (item);
1027 if (style && (style->fill.type == SP_PAINT_TYPE_PAINTSERVER)) {
1028 SPObject *server = SP_OBJECT_STYLE_FILL_SERVER(item);
1029 if (SP_IS_GRADIENT (server)) {
1031 /**
1032 * \note Bbox units for a gradient are generally a bad idea because
1033 * with them, you cannot preserve the relative position of the
1034 * object and its gradient after rotation or skew. So now we
1035 * convert them to userspace units which are easy to keep in sync
1036 * just by adding the object's transform to gradientTransform.
1037 * \todo FIXME: convert back to bbox units after transforming with
1038 * the item, so as to preserve the original units.
1039 */
1040 SPGradient *gradient = sp_gradient_convert_to_userspace (SP_GRADIENT (server), item, "fill");
1042 sp_gradient_transform_multiply (gradient, postmul, set);
1043 }
1044 }
1046 if (style && (style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)) {
1047 SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER(item);
1048 if (SP_IS_GRADIENT (server)) {
1049 SPGradient *gradient = sp_gradient_convert_to_userspace (SP_GRADIENT (server), item, "stroke");
1050 sp_gradient_transform_multiply (gradient, postmul, set);
1051 }
1052 }
1053 }
1055 void
1056 sp_item_adjust_stroke (SPItem *item, gdouble ex)
1057 {
1058 SPStyle *style = SP_OBJECT_STYLE (item);
1060 if (style && style->stroke.type != SP_PAINT_TYPE_NONE && !NR_DF_TEST_CLOSE (ex, 1.0, NR_EPSILON)) {
1062 style->stroke_width.computed *= ex;
1063 style->stroke_width.set = TRUE;
1065 if (style->stroke_dash.n_dash != 0) {
1066 int i;
1067 for (i = 0; i < style->stroke_dash.n_dash; i++) {
1068 style->stroke_dash.dash[i] *= ex;
1069 }
1070 style->stroke_dash.offset *= ex;
1071 }
1073 SP_OBJECT(item)->updateRepr();
1074 }
1075 }
1077 /**
1078 * Find out the inverse of previous transform of an item (from its repr)
1079 */
1080 NR::Matrix
1081 sp_item_transform_repr (SPItem *item)
1082 {
1083 NR::Matrix t_old(NR::identity());
1084 gchar const *t_attr = SP_OBJECT_REPR(item)->attribute("transform");
1085 if (t_attr) {
1086 NR::Matrix t;
1087 if (sp_svg_transform_read(t_attr, &t)) {
1088 t_old = t;
1089 }
1090 }
1092 return t_old;
1093 }
1096 /**
1097 * Recursively scale stroke width in \a item and its children by \a expansion.
1098 */
1099 void
1100 sp_item_adjust_stroke_width_recursive(SPItem *item, double expansion)
1101 {
1102 sp_item_adjust_stroke (item, expansion);
1104 for (SPObject *o = SP_OBJECT(item)->children; o != NULL; o = o->next) {
1105 if (SP_IS_ITEM(o))
1106 sp_item_adjust_stroke_width_recursive(SP_ITEM(o), expansion);
1107 }
1108 }
1110 /**
1111 * Recursively adjust rx and ry of rects.
1112 */
1113 void
1114 sp_item_adjust_rects_recursive(SPItem *item, NR::Matrix advertized_transform)
1115 {
1116 if (SP_IS_RECT (item)) {
1117 sp_rect_compensate_rxry (SP_RECT(item), advertized_transform);
1118 }
1120 for (SPObject *o = SP_OBJECT(item)->children; o != NULL; o = o->next) {
1121 if (SP_IS_ITEM(o))
1122 sp_item_adjust_rects_recursive(SP_ITEM(o), advertized_transform);
1123 }
1124 }
1126 /**
1127 * Recursively compensate pattern or gradient transform.
1128 */
1129 void
1130 sp_item_adjust_paint_recursive (SPItem *item, NR::Matrix advertized_transform, NR::Matrix t_ancestors, bool is_pattern)
1131 {
1132 // A clone must not touch the style (it's that of its parent!) and has no children, so quit now
1133 if (item && SP_IS_USE(item))
1134 return;
1136 // _Before_ full pattern/gradient transform: t_paint * t_item * t_ancestors
1137 // _After_ full pattern/gradient transform: t_paint_new * t_item * t_ancestors * advertised_transform
1138 // By equating these two expressions we get t_paint_new = t_paint * paint_delta, where:
1139 NR::Matrix t_item = sp_item_transform_repr (item);
1140 NR::Matrix paint_delta = t_item * t_ancestors * advertized_transform * t_ancestors.inverse() * t_item.inverse();
1142 if (is_pattern)
1143 sp_item_adjust_pattern (item, paint_delta);
1144 else
1145 sp_item_adjust_gradient (item, paint_delta);
1147 // Within text, we do not fork gradients, and so must not recurse to avoid double compensation
1148 if (item && SP_IS_TEXT(item))
1149 return;
1151 for (SPObject *o = SP_OBJECT(item)->children; o != NULL; o = o->next) {
1152 if (SP_IS_ITEM(o)) {
1153 // At the level of the transformed item, t_ancestors is identity;
1154 // below it, it is the accmmulated chain of transforms from this level to the top level
1155 sp_item_adjust_paint_recursive (SP_ITEM(o), advertized_transform, t_item * t_ancestors, is_pattern);
1156 }
1157 }
1158 }
1160 /**
1161 * A temporary wrapper for the next function accepting the NRMatrix
1162 * instead of NR::Matrix
1163 */
1164 void
1165 sp_item_write_transform(SPItem *item, Inkscape::XML::Node *repr, NRMatrix const *transform, NR::Matrix const *adv)
1166 {
1167 if (transform == NULL)
1168 sp_item_write_transform(item, repr, NR::identity(), adv);
1169 else
1170 sp_item_write_transform(item, repr, NR::Matrix (transform), adv);
1171 }
1173 /**
1174 * Set a new transform on an object.
1175 *
1176 * Compensate for stroke scaling and gradient/pattern fill transform, if
1177 * necessary. Call the object's set_transform method if transforms are
1178 * stored optimized. Send _transformed_signal. Invoke _write method so that
1179 * the repr is updated with the new transform.
1180 */
1181 void
1182 sp_item_write_transform(SPItem *item, Inkscape::XML::Node *repr, NR::Matrix const &transform, NR::Matrix const *adv)
1183 {
1184 g_return_if_fail(item != NULL);
1185 g_return_if_fail(SP_IS_ITEM(item));
1186 g_return_if_fail(repr != NULL);
1188 // calculate the relative transform, if not given by the adv attribute
1189 NR::Matrix advertized_transform;
1190 if (adv != NULL) {
1191 advertized_transform = *adv;
1192 } else {
1193 advertized_transform = sp_item_transform_repr (item).inverse() * transform;
1194 }
1196 // recursively compensate for stroke scaling, depending on user preference
1197 if (prefs_get_int_attribute("options.transform", "stroke", 1) == 0) {
1198 double const expansion = 1. / NR::expansion(advertized_transform);
1199 sp_item_adjust_stroke_width_recursive(item, expansion);
1200 }
1202 // recursively compensate rx/ry of a rect if requested
1203 if (prefs_get_int_attribute("options.transform", "rectcorners", 1) == 0) {
1204 sp_item_adjust_rects_recursive(item, advertized_transform);
1205 }
1207 // recursively compensate pattern fill if it's not to be transformed
1208 if (prefs_get_int_attribute("options.transform", "pattern", 1) == 0) {
1209 sp_item_adjust_paint_recursive (item, advertized_transform.inverse(), NR::identity(), true);
1210 }
1211 /// \todo FIXME: add the same else branch as for gradients below, to convert patterns to userSpaceOnUse as well
1212 /// recursively compensate gradient fill if it's not to be transformed
1213 if (prefs_get_int_attribute("options.transform", "gradient", 1) == 0) {
1214 sp_item_adjust_paint_recursive (item, advertized_transform.inverse(), NR::identity(), false);
1215 } else {
1216 // this converts the gradient/pattern fill/stroke, if any, to userSpaceOnUse; we need to do
1217 // it here _before_ the new transform is set, so as to use the pre-transform bbox
1218 sp_item_adjust_paint_recursive (item, NR::identity(), NR::identity(), false);
1219 }
1221 // run the object's set_transform if transforms are stored optimized and there's no clippath or mask
1222 gint preserve = prefs_get_int_attribute("options.preservetransform", "value", 0);
1223 NR::Matrix transform_attr (transform);
1224 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->set_transform
1225 && !preserve && !item->clip_ref->getObject() && !item->mask_ref->getObject()) {
1226 transform_attr = ((SPItemClass *) G_OBJECT_GET_CLASS(item))->set_transform(item, transform);
1227 }
1228 sp_item_set_item_transform(item, transform_attr);
1230 // Note: updateRepr comes before emitting the transformed signal since
1231 // it causes clone SPUse's copy of the original object to brought up to
1232 // date with the original. Otherwise, sp_use_bbox returns incorrect
1233 // values if called in code handling the transformed signal.
1234 SP_OBJECT(item)->updateRepr();
1236 // send the relative transform with a _transformed_signal
1237 item->_transformed_signal.emit(&advertized_transform, item);
1238 }
1240 gint
1241 sp_item_event(SPItem *item, SPEvent *event)
1242 {
1243 g_return_val_if_fail(item != NULL, FALSE);
1244 g_return_val_if_fail(SP_IS_ITEM(item), FALSE);
1245 g_return_val_if_fail(event != NULL, FALSE);
1247 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->event)
1248 return ((SPItemClass *) G_OBJECT_GET_CLASS(item))->event(item, event);
1250 return FALSE;
1251 }
1253 /**
1254 * Sets item private transform (not propagated to repr), without compensating stroke widths,
1255 * gradients, patterns as sp_item_write_transform does.
1256 */
1257 void
1258 sp_item_set_item_transform(SPItem *item, NR::Matrix const &transform)
1259 {
1260 g_return_if_fail(item != NULL);
1261 g_return_if_fail(SP_IS_ITEM(item));
1263 if (!matrix_equalp(transform, item->transform, NR_EPSILON)) {
1264 item->transform = transform;
1265 /* The SP_OBJECT_USER_MODIFIED_FLAG_B is used to mark the fact that it's only a
1266 transformation. It's apparently not used anywhere else. */
1267 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_USER_MODIFIED_FLAG_B);
1268 sp_item_rm_unsatisfied_cns(*item);
1269 }
1270 }
1273 /**
1274 * \pre \a ancestor really is an ancestor (\>=) of \a object, or NULL.
1275 * ("Ancestor (\>=)" here includes as far as \a object itself.)
1276 */
1277 NR::Matrix
1278 i2anc_affine(SPObject const *object, SPObject const *const ancestor) {
1279 NR::Matrix ret(NR::identity());
1280 g_return_val_if_fail(object != NULL, ret);
1282 /* stop at first non-renderable ancestor */
1283 while ( object != ancestor && SP_IS_ITEM(object) ) {
1284 if (SP_IS_ROOT(object)) {
1285 ret *= SP_ROOT(object)->c2p;
1286 }
1287 ret *= SP_ITEM(object)->transform;
1288 object = SP_OBJECT_PARENT(object);
1289 }
1290 return ret;
1291 }
1293 NR::Matrix
1294 i2i_affine(SPObject const *src, SPObject const *dest) {
1295 g_return_val_if_fail(src != NULL && dest != NULL, NR::identity());
1296 SPObject const *ancestor = src->nearestCommonAncestor(dest);
1297 return i2anc_affine(src, ancestor) / i2anc_affine(dest, ancestor);
1298 }
1300 NR::Matrix SPItem::getRelativeTransform(SPObject const *dest) const {
1301 return i2i_affine(this, dest);
1302 }
1304 /**
1305 * Returns the accumulated transformation of the item and all its ancestors, including root's viewport.
1306 * \pre (item != NULL) and SP_IS_ITEM(item).
1307 */
1308 NR::Matrix sp_item_i2doc_affine(SPItem const *item)
1309 {
1310 return i2anc_affine(item, NULL);
1311 }
1313 /**
1314 * Returns the accumulated transformation of the item and all its ancestors, but excluding root's viewport.
1315 * Used in path operations mostly.
1316 * \pre (item != NULL) and SP_IS_ITEM(item).
1317 */
1318 NR::Matrix sp_item_i2root_affine(SPItem const *item)
1319 {
1320 g_assert(item != NULL);
1321 g_assert(SP_IS_ITEM(item));
1323 NR::Matrix ret(NR::identity());
1324 g_assert(ret.test_identity());
1325 while ( NULL != SP_OBJECT_PARENT(item) ) {
1326 ret *= item->transform;
1327 item = SP_ITEM(SP_OBJECT_PARENT(item));
1328 }
1329 g_assert(SP_IS_ROOT(item));
1331 ret *= item->transform;
1333 return ret;
1334 }
1336 /* fixme: This is EVIL!!! */
1338 NR::Matrix sp_item_i2d_affine(SPItem const *item)
1339 {
1340 g_assert(item != NULL);
1341 g_assert(SP_IS_ITEM(item));
1343 NR::Matrix const ret( sp_item_i2doc_affine(item)
1344 * NR::scale(1, -1)
1345 * NR::translate(0, sp_document_height(SP_OBJECT_DOCUMENT(item))) );
1346 return ret;
1347 }
1349 // same as i2d but with i2root instead of i2doc
1350 NR::Matrix sp_item_i2r_affine(SPItem const *item)
1351 {
1352 g_assert(item != NULL);
1353 g_assert(SP_IS_ITEM(item));
1355 NR::Matrix const ret( sp_item_i2root_affine(item)
1356 * NR::scale(1, -1)
1357 * NR::translate(0, sp_document_height(SP_OBJECT_DOCUMENT(item))) );
1358 return ret;
1359 }
1361 /**
1362 * Converts a matrix \a m into the desktop coords of the \a item.
1363 * Will become a noop when we eliminate the coordinate flipping.
1364 */
1365 NR::Matrix matrix_to_desktop(NR::Matrix const m, SPItem const *item)
1366 {
1367 NR::Matrix const ret(m
1368 * NR::translate(0, -sp_document_height(SP_OBJECT_DOCUMENT(item)))
1369 * NR::scale(1, -1));
1370 return ret;
1371 }
1373 /**
1374 * Converts a matrix \a m from the desktop coords of the \a item.
1375 * Will become a noop when we eliminate the coordinate flipping.
1376 */
1377 NR::Matrix matrix_from_desktop(NR::Matrix const m, SPItem const *item)
1378 {
1379 NR::Matrix const ret(NR::scale(1, -1)
1380 * NR::translate(0, sp_document_height(SP_OBJECT_DOCUMENT(item)))
1381 * m);
1382 return ret;
1383 }
1385 void sp_item_set_i2d_affine(SPItem *item, NR::Matrix const &i2dt)
1386 {
1387 g_return_if_fail( item != NULL );
1388 g_return_if_fail( SP_IS_ITEM(item) );
1390 NR::Matrix dt2p; /* desktop to item parent transform */
1391 if (SP_OBJECT_PARENT(item)) {
1392 dt2p = sp_item_i2d_affine((SPItem *) SP_OBJECT_PARENT(item)).inverse();
1393 } else {
1394 dt2p = ( NR::translate(0, -sp_document_height(SP_OBJECT_DOCUMENT(item)))
1395 * NR::scale(1, -1) );
1396 }
1398 NR::Matrix const i2p( i2dt * dt2p );
1399 sp_item_set_item_transform(item, i2p);
1400 }
1403 NR::Matrix
1404 sp_item_dt2i_affine(SPItem const *item)
1405 {
1406 /* fixme: Implement the right way (Lauris) */
1407 return sp_item_i2d_affine(item).inverse();
1408 }
1410 /* Item views */
1412 static SPItemView *
1413 sp_item_view_new_prepend(SPItemView *list, SPItem *item, unsigned flags, unsigned key, NRArenaItem *arenaitem)
1414 {
1415 SPItemView *new_view;
1417 g_assert(item != NULL);
1418 g_assert(SP_IS_ITEM(item));
1419 g_assert(arenaitem != NULL);
1420 g_assert(NR_IS_ARENA_ITEM(arenaitem));
1422 new_view = g_new(SPItemView, 1);
1424 new_view->next = list;
1425 new_view->flags = flags;
1426 new_view->key = key;
1427 new_view->arenaitem = nr_arena_item_ref(arenaitem);
1429 return new_view;
1430 }
1432 static SPItemView *
1433 sp_item_view_list_remove(SPItemView *list, SPItemView *view)
1434 {
1435 if (view == list) {
1436 list = list->next;
1437 } else {
1438 SPItemView *prev;
1439 prev = list;
1440 while (prev->next != view) prev = prev->next;
1441 prev->next = view->next;
1442 }
1444 nr_arena_item_unref(view->arenaitem);
1445 g_free(view);
1447 return list;
1448 }
1450 /**
1451 * Return the arenaitem corresponding to the given item in the display
1452 * with the given key
1453 */
1454 NRArenaItem *
1455 sp_item_get_arenaitem(SPItem *item, unsigned key)
1456 {
1457 for ( SPItemView *iv = item->display ; iv ; iv = iv->next ) {
1458 if ( iv->key == key ) {
1459 return iv->arenaitem;
1460 }
1461 }
1463 return NULL;
1464 }
1466 int
1467 sp_item_repr_compare_position(SPItem *first, SPItem *second)
1468 {
1469 return sp_repr_compare_position(SP_OBJECT_REPR(first),
1470 SP_OBJECT_REPR(second));
1471 }
1473 SPItem *
1474 sp_item_first_item_child (SPObject *obj)
1475 {
1476 for ( SPObject *iter = sp_object_first_child(obj) ; iter ; iter = SP_OBJECT_NEXT(iter)) {
1477 if (SP_IS_ITEM (iter))
1478 return SP_ITEM (iter);
1479 }
1480 return NULL;
1481 }
1484 /*
1485 Local Variables:
1486 mode:c++
1487 c-file-style:"stroustrup"
1488 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1489 indent-tabs-mode:nil
1490 fill-column:99
1491 End:
1492 */
1493 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :