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
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 "gradient-chemistry.h"
48 #include "prefs-utils.h"
49 #include "conn-avoid-ref.h"
51 #include "libnr/nr-matrix-div.h"
52 #include "libnr/nr-matrix-fns.h"
53 #include "libnr/nr-matrix-scale-ops.h"
54 #include "libnr/nr-matrix-translate-ops.h"
55 #include "libnr/nr-scale-translate-ops.h"
56 #include "libnr/nr-translate-scale-ops.h"
57 #include "algorithms/find-last-if.h"
58 #include "util/reverse-list.h"
60 #include "xml/repr.h"
62 #define noSP_ITEM_DEBUG_IDLE
64 static void sp_item_class_init(SPItemClass *klass);
65 static void sp_item_init(SPItem *item);
67 static void sp_item_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
68 static void sp_item_release(SPObject *object);
69 static void sp_item_set(SPObject *object, unsigned key, gchar const *value);
70 static void sp_item_update(SPObject *object, SPCtx *ctx, guint flags);
71 static Inkscape::XML::Node *sp_item_write(SPObject *object, Inkscape::XML::Node *repr, guint flags);
73 static gchar *sp_item_private_description(SPItem *item);
74 static void sp_item_private_snappoints(SPItem const *item, SnapPointsIter p);
76 static SPItemView *sp_item_view_new_prepend(SPItemView *list, SPItem *item, unsigned flags, unsigned key, NRArenaItem *arenaitem);
77 static SPItemView *sp_item_view_list_remove(SPItemView *list, SPItemView *view);
79 static SPObjectClass *parent_class;
81 static void clip_ref_changed(SPObject *old_clip, SPObject *clip, SPItem *item);
82 static void mask_ref_changed(SPObject *old_clip, SPObject *clip, SPItem *item);
84 /**
85 * Registers SPItem class and returns its type number.
86 */
87 GType
88 sp_item_get_type(void)
89 {
90 static GType type = 0;
91 if (!type) {
92 GTypeInfo info = {
93 sizeof(SPItemClass),
94 NULL, NULL,
95 (GClassInitFunc) sp_item_class_init,
96 NULL, NULL,
97 sizeof(SPItem),
98 16,
99 (GInstanceInitFunc) sp_item_init,
100 NULL, /* value_table */
101 };
102 type = g_type_register_static(SP_TYPE_OBJECT, "SPItem", &info, (GTypeFlags)0);
103 }
104 return type;
105 }
107 /**
108 * SPItem vtable initialization.
109 */
110 static void
111 sp_item_class_init(SPItemClass *klass)
112 {
113 SPObjectClass *sp_object_class = (SPObjectClass *) klass;
115 parent_class = (SPObjectClass *)g_type_class_ref(SP_TYPE_OBJECT);
117 sp_object_class->build = sp_item_build;
118 sp_object_class->release = sp_item_release;
119 sp_object_class->set = sp_item_set;
120 sp_object_class->update = sp_item_update;
121 sp_object_class->write = sp_item_write;
123 klass->description = sp_item_private_description;
124 klass->snappoints = sp_item_private_snappoints;
125 }
127 /**
128 * Callback for SPItem object initialization.
129 */
130 static void
131 sp_item_init(SPItem *item)
132 {
133 SPObject *object = SP_OBJECT(item);
135 item->sensitive = TRUE;
137 item->transform_center_x = 0;
138 item->transform_center_y = 0;
140 item->transform = NR::identity();
142 item->display = NULL;
144 item->clip_ref = new SPClipPathReference(SP_OBJECT(item));
145 {
146 sigc::signal<void, SPObject *, SPObject *> cs1=item->clip_ref->changedSignal();
147 sigc::slot2<void,SPObject*, SPObject *> sl1=sigc::bind(sigc::ptr_fun(clip_ref_changed), item);
148 cs1.connect(sl1);
149 }
151 item->mask_ref = new SPMaskReference(SP_OBJECT(item));
152 sigc::signal<void, SPObject *, SPObject *> cs2=item->mask_ref->changedSignal();
153 sigc::slot2<void,SPObject*, SPObject *> sl2=sigc::bind(sigc::ptr_fun(mask_ref_changed), item);
154 cs2.connect(sl2);
156 if (!object->style) object->style = sp_style_new_from_object(SP_OBJECT(item));
158 item->avoidRef = new SPAvoidRef(item);
160 new (&item->_transformed_signal) sigc::signal<void, NR::Matrix const *, SPItem *>();
161 }
163 bool SPItem::isVisibleAndUnlocked() const {
164 return (!isHidden() && !isLocked());
165 }
167 bool SPItem::isVisibleAndUnlocked(unsigned display_key) const {
168 return (!isHidden(display_key) && !isLocked());
169 }
171 bool SPItem::isLocked() const {
172 for (SPObject *o = SP_OBJECT(this); o != NULL; o = SP_OBJECT_PARENT(o)) {
173 if (SP_IS_ITEM(o) && !(SP_ITEM(o)->sensitive))
174 return true;
175 }
176 return false;
177 }
179 void SPItem::setLocked(bool locked) {
180 SP_OBJECT_REPR(this)->setAttribute("sodipodi:insensitive",
181 ( locked ? "1" : NULL ));
182 updateRepr();
183 }
185 bool SPItem::isHidden() const {
186 return style->display.computed == SP_CSS_DISPLAY_NONE;
187 }
189 void SPItem::setHidden(bool hide) {
190 style->display.set = TRUE;
191 style->display.value = ( hide ? SP_CSS_DISPLAY_NONE : SP_CSS_DISPLAY_INLINE );
192 style->display.computed = style->display.value;
193 style->display.inherit = FALSE;
194 updateRepr();
195 }
197 bool SPItem::isHidden(unsigned display_key) const {
198 for ( SPItemView *view(display) ; view ; view = view->next ) {
199 if ( view->key == display_key ) {
200 g_assert(view->arenaitem != NULL);
201 for ( NRArenaItem *arenaitem = view->arenaitem ;
202 arenaitem ; arenaitem = arenaitem->parent )
203 {
204 if (!arenaitem->visible) {
205 return true;
206 }
207 }
208 return false;
209 }
210 }
211 return true;
212 }
214 /**
215 * Returns something suitable for the `Hide' checkbox in the Object Properties dialog box.
216 * Corresponds to setExplicitlyHidden.
217 */
218 bool
219 SPItem::isExplicitlyHidden() const
220 {
221 return (this->style->display.set
222 && this->style->display.value == SP_CSS_DISPLAY_NONE);
223 }
225 /**
226 * Sets the display CSS property to `hidden' if \a val is true,
227 * otherwise makes it unset
228 */
229 void
230 SPItem::setExplicitlyHidden(bool const val) {
231 this->style->display.set = val;
232 this->style->display.value = ( val ? SP_CSS_DISPLAY_NONE : SP_CSS_DISPLAY_INLINE );
233 this->style->display.computed = this->style->display.value;
234 this->updateRepr();
235 }
237 /**
238 * Sets the transform_center_x and transform_center_y properties to retain the rotation centre
239 */
240 void
241 SPItem::setCenter(NR::Point object_centre) {
242 NR::Rect bbox = invokeBbox(sp_item_i2d_affine(this));
243 if (!bbox.isEmpty()) {
244 transform_center_x = object_centre[NR::X] - bbox.midpoint()[NR::X];
245 if (fabs(transform_center_x) < 1e-5) // rounding error
246 transform_center_x = 0;
247 transform_center_y = object_centre[NR::Y] - bbox.midpoint()[NR::Y];
248 if (fabs(transform_center_y) < 1e-5) // rounding error
249 transform_center_y = 0;
250 }
251 }
253 void
254 SPItem::unsetCenter() {
255 transform_center_x = 0;
256 transform_center_y = 0;
257 }
259 bool SPItem::isCenterSet() {
260 return (transform_center_x != 0 || transform_center_y != 0);
261 }
263 NR::Point SPItem::getCenter() {
264 NR::Rect bbox = invokeBbox(sp_item_i2d_affine(this));
265 if (!bbox.isEmpty()) {
266 return bbox.midpoint() + NR::Point (this->transform_center_x, this->transform_center_y);
267 } else {
268 return NR::Point (0, 0); // something's wrong!
269 }
270 }
273 namespace {
275 bool is_item(SPObject const &object) {
276 return SP_IS_ITEM(&object);
277 }
279 }
281 void SPItem::raiseToTop() {
282 using Inkscape::Algorithms::find_last_if;
284 SPObject *topmost=find_last_if<SPObject::SiblingIterator>(
285 SP_OBJECT_NEXT(this), NULL, &is_item
286 );
287 if (topmost) {
288 Inkscape::XML::Node *repr=SP_OBJECT_REPR(this);
289 sp_repr_parent(repr)->changeOrder(repr, SP_OBJECT_REPR(topmost));
290 }
291 }
293 void SPItem::raiseOne() {
294 SPObject *next_higher=std::find_if<SPObject::SiblingIterator>(
295 SP_OBJECT_NEXT(this), NULL, &is_item
296 );
297 if (next_higher) {
298 Inkscape::XML::Node *repr=SP_OBJECT_REPR(this);
299 Inkscape::XML::Node *ref=SP_OBJECT_REPR(next_higher);
300 sp_repr_parent(repr)->changeOrder(repr, ref);
301 }
302 }
304 void SPItem::lowerOne() {
305 using Inkscape::Util::MutableList;
306 using Inkscape::Util::reverse_list;
308 MutableList<SPObject &> next_lower=std::find_if(
309 reverse_list<SPObject::SiblingIterator>(
310 SP_OBJECT_PARENT(this)->firstChild(), this
311 ),
312 MutableList<SPObject &>(),
313 &is_item
314 );
315 if (next_lower) {
316 ++next_lower;
317 Inkscape::XML::Node *repr=SP_OBJECT_REPR(this);
318 Inkscape::XML::Node *ref=( next_lower ? SP_OBJECT_REPR(&*next_lower) : NULL );
319 sp_repr_parent(repr)->changeOrder(repr, ref);
320 }
321 }
323 void SPItem::lowerToBottom() {
324 using Inkscape::Algorithms::find_last_if;
325 using Inkscape::Util::MutableList;
326 using Inkscape::Util::reverse_list;
328 MutableList<SPObject &> bottom=find_last_if(
329 reverse_list<SPObject::SiblingIterator>(
330 SP_OBJECT_PARENT(this)->firstChild(), this
331 ),
332 MutableList<SPObject &>(),
333 &is_item
334 );
335 if (bottom) {
336 ++bottom;
337 Inkscape::XML::Node *repr=SP_OBJECT_REPR(this);
338 Inkscape::XML::Node *ref=( bottom ? SP_OBJECT_REPR(&*bottom) : NULL );
339 sp_repr_parent(repr)->changeOrder(repr, ref);
340 }
341 }
343 static void
344 sp_item_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
345 {
346 sp_object_read_attr(object, "style");
347 sp_object_read_attr(object, "transform");
348 sp_object_read_attr(object, "clip-path");
349 sp_object_read_attr(object, "mask");
350 sp_object_read_attr(object, "sodipodi:insensitive");
351 sp_object_read_attr(object, "sodipodi:nonprintable");
352 sp_object_read_attr(object, "inkscape:transform-center-x");
353 sp_object_read_attr(object, "inkscape:transform-center-y");
354 sp_object_read_attr(object, "inkscape:connector-avoid");
356 if (((SPObjectClass *) (parent_class))->build) {
357 (* ((SPObjectClass *) (parent_class))->build)(object, document, repr);
358 }
359 }
361 static void
362 sp_item_release(SPObject *object)
363 {
364 SPItem *item = (SPItem *) object;
366 if (item->clip_ref) {
367 item->clip_ref->detach();
368 delete item->clip_ref;
369 item->clip_ref = NULL;
370 }
372 if (item->mask_ref) {
373 item->mask_ref->detach();
374 delete item->mask_ref;
375 item->mask_ref = NULL;
376 }
378 if (item->avoidRef) {
379 delete item->avoidRef;
380 item->avoidRef = NULL;
381 }
383 if (((SPObjectClass *) (parent_class))->release) {
384 ((SPObjectClass *) parent_class)->release(object);
385 }
387 while (item->display) {
388 nr_arena_item_unparent(item->display->arenaitem);
389 item->display = sp_item_view_list_remove(item->display, item->display);
390 }
392 item->_transformed_signal.~signal();
393 }
395 static void
396 sp_item_set(SPObject *object, unsigned key, gchar const *value)
397 {
398 SPItem *item = (SPItem *) object;
400 switch (key) {
401 case SP_ATTR_TRANSFORM: {
402 NR::Matrix t;
403 if (value && sp_svg_transform_read(value, &t)) {
404 sp_item_set_item_transform(item, t);
405 } else {
406 sp_item_set_item_transform(item, NR::identity());
407 }
408 break;
409 }
410 case SP_PROP_CLIP_PATH: {
411 gchar *uri = Inkscape::parse_css_url(value);
412 if (uri) {
413 try {
414 item->clip_ref->attach(Inkscape::URI(uri));
415 } catch (Inkscape::BadURIException &e) {
416 g_warning("%s", e.what());
417 item->clip_ref->detach();
418 }
419 g_free(uri);
420 } else {
421 item->clip_ref->detach();
422 }
424 break;
425 }
426 case SP_PROP_MASK: {
427 gchar *uri=Inkscape::parse_css_url(value);
428 if (uri) {
429 try {
430 item->mask_ref->attach(Inkscape::URI(uri));
431 } catch (Inkscape::BadURIException &e) {
432 g_warning("%s", e.what());
433 item->mask_ref->detach();
434 }
435 g_free(uri);
436 } else {
437 item->mask_ref->detach();
438 }
440 break;
441 }
442 case SP_ATTR_SODIPODI_INSENSITIVE:
443 item->sensitive = !value;
444 for (SPItemView *v = item->display; v != NULL; v = v->next) {
445 nr_arena_item_set_sensitive(v->arenaitem, item->sensitive);
446 }
447 break;
448 case SP_ATTR_STYLE:
449 sp_style_read_from_object(object->style, object);
450 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
451 break;
452 case SP_ATTR_CONNECTOR_AVOID:
453 item->avoidRef->setAvoid(value);
454 break;
455 case SP_ATTR_TRANSFORM_CENTER_X:
456 if (value) {
457 item->transform_center_x = g_strtod(value, NULL);
458 }
459 break;
460 case SP_ATTR_TRANSFORM_CENTER_Y:
461 if (value) {
462 item->transform_center_y = g_strtod(value, NULL);
463 }
464 break;
465 default:
466 if (SP_ATTRIBUTE_IS_CSS(key)) {
467 sp_style_read_from_object(object->style, object);
468 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
469 } else {
470 if (((SPObjectClass *) (parent_class))->set) {
471 (* ((SPObjectClass *) (parent_class))->set)(object, key, value);
472 }
473 }
474 break;
475 }
476 }
478 static void
479 clip_ref_changed(SPObject *old_clip, SPObject *clip, SPItem *item)
480 {
481 if (old_clip) {
482 SPItemView *v;
483 /* Hide clippath */
484 for (v = item->display; v != NULL; v = v->next) {
485 sp_clippath_hide(SP_CLIPPATH(old_clip), NR_ARENA_ITEM_GET_KEY(v->arenaitem));
486 nr_arena_item_set_clip(v->arenaitem, NULL);
487 }
488 }
489 if (SP_IS_CLIPPATH(clip)) {
490 NRRect bbox;
491 sp_item_invoke_bbox(item, &bbox, NR::identity(), TRUE);
492 for (SPItemView *v = item->display; v != NULL; v = v->next) {
493 if (!v->arenaitem->key) {
494 NR_ARENA_ITEM_SET_KEY(v->arenaitem, sp_item_display_key_new(3));
495 }
496 NRArenaItem *ai = sp_clippath_show(SP_CLIPPATH(clip),
497 NR_ARENA_ITEM_ARENA(v->arenaitem),
498 NR_ARENA_ITEM_GET_KEY(v->arenaitem));
499 nr_arena_item_set_clip(v->arenaitem, ai);
500 nr_arena_item_unref(ai);
501 sp_clippath_set_bbox(SP_CLIPPATH(clip), NR_ARENA_ITEM_GET_KEY(v->arenaitem), &bbox);
502 }
503 }
504 }
506 static void
507 mask_ref_changed(SPObject *old_mask, SPObject *mask, SPItem *item)
508 {
509 if (old_mask) {
510 /* Hide mask */
511 for (SPItemView *v = item->display; v != NULL; v = v->next) {
512 sp_mask_hide(SP_MASK(old_mask), NR_ARENA_ITEM_GET_KEY(v->arenaitem));
513 nr_arena_item_set_mask(v->arenaitem, NULL);
514 }
515 }
516 if (SP_IS_MASK(mask)) {
517 NRRect bbox;
518 sp_item_invoke_bbox(item, &bbox, NR::identity(), TRUE);
519 for (SPItemView *v = item->display; v != NULL; v = v->next) {
520 if (!v->arenaitem->key) {
521 NR_ARENA_ITEM_SET_KEY(v->arenaitem, sp_item_display_key_new(3));
522 }
523 NRArenaItem *ai = sp_mask_show(SP_MASK(mask),
524 NR_ARENA_ITEM_ARENA(v->arenaitem),
525 NR_ARENA_ITEM_GET_KEY(v->arenaitem));
526 nr_arena_item_set_mask(v->arenaitem, ai);
527 nr_arena_item_unref(ai);
528 sp_mask_set_bbox(SP_MASK(mask), NR_ARENA_ITEM_GET_KEY(v->arenaitem), &bbox);
529 }
530 }
531 }
533 static void
534 sp_item_update(SPObject *object, SPCtx *ctx, guint flags)
535 {
536 SPItem *item = SP_ITEM(object);
538 if (((SPObjectClass *) (parent_class))->update)
539 (* ((SPObjectClass *) (parent_class))->update)(object, ctx, flags);
541 if (flags & (SP_OBJECT_CHILD_MODIFIED_FLAG | SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG)) {
542 if (flags & SP_OBJECT_MODIFIED_FLAG) {
543 for (SPItemView *v = item->display; v != NULL; v = v->next) {
544 nr_arena_item_set_transform(v->arenaitem, item->transform);
545 }
546 }
548 SPClipPath *clip_path = item->clip_ref->getObject();
549 SPMask *mask = item->mask_ref->getObject();
551 if ( clip_path || mask ) {
552 NRRect bbox;
553 sp_item_invoke_bbox(item, &bbox, NR::identity(), TRUE);
554 if (clip_path) {
555 for (SPItemView *v = item->display; v != NULL; v = v->next) {
556 sp_clippath_set_bbox(clip_path, NR_ARENA_ITEM_GET_KEY(v->arenaitem), &bbox);
557 }
558 }
559 if (mask) {
560 for (SPItemView *v = item->display; v != NULL; v = v->next) {
561 sp_mask_set_bbox(mask, NR_ARENA_ITEM_GET_KEY(v->arenaitem), &bbox);
562 }
563 }
564 }
566 if (flags & SP_OBJECT_STYLE_MODIFIED_FLAG) {
567 for (SPItemView *v = item->display; v != NULL; v = v->next) {
568 nr_arena_item_set_opacity(v->arenaitem, SP_SCALE24_TO_FLOAT(object->style->opacity.value));
569 nr_arena_item_set_visible(v->arenaitem, !item->isHidden());
570 }
571 }
572 }
574 // Update libavoid with item geometry (for connector routing).
575 item->avoidRef->handleSettingChange();
576 }
578 static Inkscape::XML::Node *
579 sp_item_write(SPObject *const object, Inkscape::XML::Node *repr, guint flags)
580 {
581 SPItem *item = SP_ITEM(object);
583 gchar c[256];
584 if (sp_svg_transform_write(c, 256, item->transform)) {
585 repr->setAttribute("transform", c);
586 } else {
587 repr->setAttribute("transform", NULL);
588 }
590 SPObject const *const parent = SP_OBJECT_PARENT(object);
591 /** \todo Can someone please document why this is conditional on having
592 * a parent? The only parentless thing I can think of is the top-level
593 * <svg> element (SPRoot). SPRoot is derived from SPGroup, and can have
594 * style. I haven't looked at callers.
595 */
596 if (parent) {
597 SPStyle const *const obj_style = SP_OBJECT_STYLE(object);
598 if (obj_style) {
599 gchar *s = sp_style_write_string(obj_style, SP_STYLE_FLAG_IFSET);
600 repr->setAttribute("style", ( *s ? s : NULL ));
601 g_free(s);
602 } else {
603 /** \todo I'm not sure what to do in this case. Bug #1165868
604 * suggests that it can arise, but the submitter doesn't know
605 * how to do so reliably. The main two options are either
606 * leave repr's style attribute unchanged, or explicitly clear it.
607 * Must also consider what to do with property attributes for
608 * the element; see below.
609 */
610 char const *style_str = repr->attribute("style");
611 if (!style_str) {
612 style_str = "NULL";
613 }
614 g_warning("Item's style is NULL; repr style attribute is %s", style_str);
615 }
617 /** \note We treat object->style as authoritative. Its effects have
618 * been written to the style attribute above; any properties that are
619 * unset we take to be deliberately unset (e.g. so that clones can
620 * override the property).
621 *
622 * Note that the below has an undesirable consequence of changing the
623 * appearance on renderers that lack CSS support (e.g. SVG tiny);
624 * possibly we should write property attributes instead of a style
625 * attribute.
626 */
627 sp_style_unset_property_attrs (object);
628 }
630 if (flags & SP_OBJECT_WRITE_EXT) {
631 repr->setAttribute("sodipodi:insensitive", ( item->sensitive ? NULL : "true" ));
632 if (item->transform_center_x != 0)
633 sp_repr_set_svg_double (repr, "inkscape:transform-center-x", item->transform_center_x);
634 else
635 repr->setAttribute ("inkscape:transform-center-x", NULL);
636 if (item->transform_center_y != 0)
637 sp_repr_set_svg_double (repr, "inkscape:transform-center-y", item->transform_center_y);
638 else
639 repr->setAttribute ("inkscape:transform-center-y", NULL);
640 }
642 if (((SPObjectClass *) (parent_class))->write) {
643 ((SPObjectClass *) (parent_class))->write(object, repr, flags);
644 }
646 return repr;
647 }
649 NR::Rect SPItem::invokeBbox(NR::Matrix const &transform) const
650 {
651 NRRect r;
652 sp_item_invoke_bbox_full(this, &r, transform, 0, TRUE);
653 return NR::Rect(r);
654 }
656 void
657 sp_item_invoke_bbox(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const clear)
658 {
659 sp_item_invoke_bbox_full(item, bbox, transform, 0, clear);
660 }
662 void
663 sp_item_invoke_bbox_full(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags, unsigned const clear)
664 {
665 g_assert(item != NULL);
666 g_assert(SP_IS_ITEM(item));
667 g_assert(bbox != NULL);
669 if (clear) {
670 bbox->x0 = bbox->y0 = 1e18;
671 bbox->x1 = bbox->y1 = -1e18;
672 }
674 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->bbox) {
675 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->bbox(item, bbox, transform, flags);
676 }
677 }
679 unsigned sp_item_pos_in_parent(SPItem *item)
680 {
681 g_assert(item != NULL);
682 g_assert(SP_IS_ITEM(item));
684 SPObject *parent = SP_OBJECT_PARENT(item);
685 g_assert(parent != NULL);
686 g_assert(SP_IS_OBJECT(parent));
688 SPObject *object = SP_OBJECT(item);
690 unsigned pos=0;
691 for ( SPObject *iter = sp_object_first_child(parent) ; iter ; iter = SP_OBJECT_NEXT(iter)) {
692 if ( iter == object ) {
693 return pos;
694 }
695 if (SP_IS_ITEM(iter)) {
696 pos++;
697 }
698 }
700 g_assert_not_reached();
701 return 0;
702 }
704 void
705 sp_item_bbox_desktop(SPItem *item, NRRect *bbox)
706 {
707 g_assert(item != NULL);
708 g_assert(SP_IS_ITEM(item));
709 g_assert(bbox != NULL);
711 sp_item_invoke_bbox(item, bbox, sp_item_i2d_affine(item), TRUE);
712 }
714 NR::Rect sp_item_bbox_desktop(SPItem *item)
715 {
716 NRRect ret;
717 sp_item_bbox_desktop(item, &ret);
718 return NR::Rect(ret);
719 }
721 static void sp_item_private_snappoints(SPItem const *item, SnapPointsIter p)
722 {
723 NR::Rect const bbox = item->invokeBbox(sp_item_i2d_affine(item));
724 /* Just a pair of opposite corners of the bounding box suffices given that we don't yet
725 support angled guide lines. */
727 *p = bbox.min();
728 *p = bbox.max();
729 }
731 void sp_item_snappoints(SPItem const *item, SnapPointsIter p)
732 {
733 g_assert (item != NULL);
734 g_assert (SP_IS_ITEM(item));
736 SPItemClass const &item_class = *(SPItemClass const *) G_OBJECT_GET_CLASS(item);
737 if (item_class.snappoints) {
738 item_class.snappoints(item, p);
739 }
740 }
742 void
743 sp_item_invoke_print(SPItem *item, SPPrintContext *ctx)
744 {
745 if (!item->isHidden()) {
746 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->print) {
747 if (!item->transform.test_identity()
748 || SP_OBJECT_STYLE(item)->opacity.value != SP_SCALE24_MAX)
749 {
750 sp_print_bind(ctx, item->transform, SP_SCALE24_TO_FLOAT(SP_OBJECT_STYLE(item)->opacity.value));
751 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->print(item, ctx);
752 sp_print_release(ctx);
753 } else {
754 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->print(item, ctx);
755 }
756 }
757 }
758 }
760 static gchar *
761 sp_item_private_description(SPItem *item)
762 {
763 return g_strdup(_("Object"));
764 }
766 /**
767 * Returns a string suitable for status bar, formatted in pango markup language.
768 *
769 * Must be freed by caller.
770 */
771 gchar *
772 sp_item_description(SPItem *item)
773 {
774 g_assert(item != NULL);
775 g_assert(SP_IS_ITEM(item));
777 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->description) {
778 return ((SPItemClass *) G_OBJECT_GET_CLASS(item))->description(item);
779 }
781 g_assert_not_reached();
782 return NULL;
783 }
785 /**
786 * Allocates unique integer keys.
787 * \param numkeys Number of keys required.
788 * \return First allocated key; hence if the returned key is n
789 * you can use n, n + 1, ..., n + (numkeys - 1)
790 */
791 unsigned
792 sp_item_display_key_new(unsigned numkeys)
793 {
794 static unsigned dkey = 0;
796 dkey += numkeys;
798 return dkey - numkeys;
799 }
801 NRArenaItem *
802 sp_item_invoke_show(SPItem *item, NRArena *arena, unsigned key, unsigned flags)
803 {
804 g_assert(item != NULL);
805 g_assert(SP_IS_ITEM(item));
806 g_assert(arena != NULL);
807 g_assert(NR_IS_ARENA(arena));
809 NRArenaItem *ai = NULL;
810 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->show) {
811 ai = ((SPItemClass *) G_OBJECT_GET_CLASS(item))->show(item, arena, key, flags);
812 }
814 if (ai != NULL) {
815 item->display = sp_item_view_new_prepend(item->display, item, flags, key, ai);
816 nr_arena_item_set_transform(ai, item->transform);
817 nr_arena_item_set_opacity(ai, SP_SCALE24_TO_FLOAT(SP_OBJECT_STYLE(item)->opacity.value));
818 nr_arena_item_set_visible(ai, !item->isHidden());
819 nr_arena_item_set_sensitive(ai, item->sensitive);
820 if (item->clip_ref->getObject()) {
821 NRArenaItem *ac;
822 if (!item->display->arenaitem->key) NR_ARENA_ITEM_SET_KEY(item->display->arenaitem, sp_item_display_key_new(3));
823 ac = sp_clippath_show(item->clip_ref->getObject(), arena, NR_ARENA_ITEM_GET_KEY(item->display->arenaitem));
824 nr_arena_item_set_clip(ai, ac);
825 nr_arena_item_unref(ac);
826 }
827 if (item->mask_ref->getObject()) {
828 NRArenaItem *ac;
829 if (!item->display->arenaitem->key) NR_ARENA_ITEM_SET_KEY(item->display->arenaitem, sp_item_display_key_new(3));
830 ac = sp_mask_show(item->mask_ref->getObject(), arena, NR_ARENA_ITEM_GET_KEY(item->display->arenaitem));
831 nr_arena_item_set_mask(ai, ac);
832 nr_arena_item_unref(ac);
833 }
834 NR_ARENA_ITEM_SET_DATA(ai, item);
835 }
837 return ai;
838 }
840 void
841 sp_item_invoke_hide(SPItem *item, unsigned key)
842 {
843 g_assert(item != NULL);
844 g_assert(SP_IS_ITEM(item));
846 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->hide) {
847 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->hide(item, key);
848 }
850 SPItemView *ref = NULL;
851 SPItemView *v = item->display;
852 while (v != NULL) {
853 SPItemView *next = v->next;
854 if (v->key == key) {
855 if (item->clip_ref->getObject()) {
856 sp_clippath_hide(item->clip_ref->getObject(), NR_ARENA_ITEM_GET_KEY(v->arenaitem));
857 nr_arena_item_set_clip(v->arenaitem, NULL);
858 }
859 if (item->mask_ref->getObject()) {
860 sp_mask_hide(item->mask_ref->getObject(), NR_ARENA_ITEM_GET_KEY(v->arenaitem));
861 nr_arena_item_set_mask(v->arenaitem, NULL);
862 }
863 if (!ref) {
864 item->display = v->next;
865 } else {
866 ref->next = v->next;
867 }
868 nr_arena_item_unparent(v->arenaitem);
869 nr_arena_item_unref(v->arenaitem);
870 g_free(v);
871 } else {
872 ref = v;
873 }
874 v = next;
875 }
876 }
878 // Adjusters
880 void
881 sp_item_adjust_pattern (SPItem *item, NR::Matrix const &postmul, bool set)
882 {
883 SPStyle *style = SP_OBJECT_STYLE (item);
885 if (style && (style->fill.type == SP_PAINT_TYPE_PAINTSERVER)) {
886 SPObject *server = SP_OBJECT_STYLE_FILL_SERVER (item);
887 if (SP_IS_PATTERN (server)) {
888 SPPattern *pattern = sp_pattern_clone_if_necessary (item, SP_PATTERN (server), "fill");
889 sp_pattern_transform_multiply (pattern, postmul, set);
890 }
891 }
893 if (style && (style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)) {
894 SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER (item);
895 if (SP_IS_PATTERN (server)) {
896 SPPattern *pattern = sp_pattern_clone_if_necessary (item, SP_PATTERN (server), "stroke");
897 sp_pattern_transform_multiply (pattern, postmul, set);
898 }
899 }
901 }
903 void
904 sp_item_adjust_gradient (SPItem *item, NR::Matrix const &postmul, bool set)
905 {
906 SPStyle *style = SP_OBJECT_STYLE (item);
908 if (style && (style->fill.type == SP_PAINT_TYPE_PAINTSERVER)) {
909 SPObject *server = SP_OBJECT_STYLE_FILL_SERVER(item);
910 if (SP_IS_GRADIENT (server)) {
912 /**
913 * \note Bbox units for a gradient are generally a bad idea because
914 * with them, you cannot preserve the relative position of the
915 * object and its gradient after rotation or skew. So now we
916 * convert them to userspace units which are easy to keep in sync
917 * just by adding the object's transform to gradientTransform.
918 * \todo FIXME: convert back to bbox units after transforming with
919 * the item, so as to preserve the original units.
920 */
921 SPGradient *gradient = sp_gradient_convert_to_userspace (SP_GRADIENT (server), item, "fill");
923 sp_gradient_transform_multiply (gradient, postmul, set);
924 }
925 }
927 if (style && (style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)) {
928 SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER(item);
929 if (SP_IS_GRADIENT (server)) {
930 SPGradient *gradient = sp_gradient_convert_to_userspace (SP_GRADIENT (server), item, "stroke");
931 sp_gradient_transform_multiply (gradient, postmul, set);
932 }
933 }
934 }
936 void
937 sp_item_adjust_stroke (SPItem *item, gdouble ex)
938 {
939 SPStyle *style = SP_OBJECT_STYLE (item);
941 if (style && style->stroke.type != SP_PAINT_TYPE_NONE && !NR_DF_TEST_CLOSE (ex, 1.0, NR_EPSILON)) {
943 style->stroke_width.computed *= ex;
944 style->stroke_width.set = TRUE;
946 if (style->stroke_dash.n_dash != 0) {
947 int i;
948 for (i = 0; i < style->stroke_dash.n_dash; i++) {
949 style->stroke_dash.dash[i] *= ex;
950 }
951 style->stroke_dash.offset *= ex;
952 }
954 SP_OBJECT(item)->updateRepr();
955 }
956 }
958 /**
959 * Find out the inverse of previous transform of an item (from its repr)
960 */
961 NR::Matrix
962 sp_item_transform_repr (SPItem *item)
963 {
964 NR::Matrix t_old(NR::identity());
965 gchar const *t_attr = SP_OBJECT_REPR(item)->attribute("transform");
966 if (t_attr) {
967 NR::Matrix t;
968 if (sp_svg_transform_read(t_attr, &t)) {
969 t_old = t;
970 }
971 }
973 return t_old;
974 }
977 /**
978 * Recursively scale stroke width in \a item and its children by \a expansion.
979 */
980 void
981 sp_item_adjust_stroke_width_recursive(SPItem *item, double expansion)
982 {
983 sp_item_adjust_stroke (item, expansion);
985 for (SPObject *o = SP_OBJECT(item)->children; o != NULL; o = o->next) {
986 if (SP_IS_ITEM(o))
987 sp_item_adjust_stroke_width_recursive(SP_ITEM(o), expansion);
988 }
989 }
991 /**
992 * Recursively adjust rx and ry of rects.
993 */
994 void
995 sp_item_adjust_rects_recursive(SPItem *item, NR::Matrix advertized_transform)
996 {
997 if (SP_IS_RECT (item)) {
998 sp_rect_compensate_rxry (SP_RECT(item), advertized_transform);
999 }
1001 for (SPObject *o = SP_OBJECT(item)->children; o != NULL; o = o->next) {
1002 if (SP_IS_ITEM(o))
1003 sp_item_adjust_rects_recursive(SP_ITEM(o), advertized_transform);
1004 }
1005 }
1007 /**
1008 * Recursively compensate pattern or gradient transform.
1009 */
1010 void
1011 sp_item_adjust_paint_recursive (SPItem *item, NR::Matrix advertized_transform, NR::Matrix t_ancestors, bool is_pattern)
1012 {
1013 // A clone must not touch the style (it's that of its parent!) and has no children, so quit now
1014 if (item && SP_IS_USE(item))
1015 return;
1017 // _Before_ full pattern/gradient transform: t_paint * t_item * t_ancestors
1018 // _After_ full pattern/gradient transform: t_paint_new * t_item * t_ancestors * advertised_transform
1019 // By equating these two expressions we get t_paint_new = t_paint * paint_delta, where:
1020 NR::Matrix t_item = sp_item_transform_repr (item);
1021 NR::Matrix paint_delta = t_item * t_ancestors * advertized_transform * t_ancestors.inverse() * t_item.inverse();
1023 if (is_pattern)
1024 sp_item_adjust_pattern (item, paint_delta);
1025 else
1026 sp_item_adjust_gradient (item, paint_delta);
1028 // Within text, we do not fork gradients, and so must not recurse to avoid double compensation
1029 if (item && SP_IS_TEXT(item))
1030 return;
1032 for (SPObject *o = SP_OBJECT(item)->children; o != NULL; o = o->next) {
1033 if (SP_IS_ITEM(o)) {
1034 // At the level of the transformed item, t_ancestors is identity;
1035 // below it, it is the accmmulated chain of transforms from this level to the top level
1036 sp_item_adjust_paint_recursive (SP_ITEM(o), advertized_transform, t_item * t_ancestors, is_pattern);
1037 }
1038 }
1039 }
1041 /**
1042 * A temporary wrapper for the next function accepting the NRMatrix
1043 * instead of NR::Matrix
1044 */
1045 void
1046 sp_item_write_transform(SPItem *item, Inkscape::XML::Node *repr, NRMatrix const *transform, NR::Matrix const *adv)
1047 {
1048 if (transform == NULL)
1049 sp_item_write_transform(item, repr, NR::identity(), adv);
1050 else
1051 sp_item_write_transform(item, repr, NR::Matrix (transform), adv);
1052 }
1054 /**
1055 * Set a new transform on an object.
1056 *
1057 * Compensate for stroke scaling and gradient/pattern fill transform, if
1058 * necessary. Call the object's set_transform method if transforms are
1059 * stored optimized. Send _transformed_signal. Invoke _write method so that
1060 * the repr is updated with the new transform.
1061 */
1062 void
1063 sp_item_write_transform(SPItem *item, Inkscape::XML::Node *repr, NR::Matrix const &transform, NR::Matrix const *adv)
1064 {
1065 g_return_if_fail(item != NULL);
1066 g_return_if_fail(SP_IS_ITEM(item));
1067 g_return_if_fail(repr != NULL);
1069 // calculate the relative transform, if not given by the adv attribute
1070 NR::Matrix advertized_transform;
1071 if (adv != NULL) {
1072 advertized_transform = *adv;
1073 } else {
1074 advertized_transform = sp_item_transform_repr (item).inverse() * transform;
1075 }
1077 // recursively compensate for stroke scaling, depending on user preference
1078 if (prefs_get_int_attribute("options.transform", "stroke", 1) == 0) {
1079 double const expansion = 1. / NR::expansion(advertized_transform);
1080 sp_item_adjust_stroke_width_recursive(item, expansion);
1081 }
1083 // recursively compensate rx/ry of a rect if requested
1084 if (prefs_get_int_attribute("options.transform", "rectcorners", 1) == 0) {
1085 sp_item_adjust_rects_recursive(item, advertized_transform);
1086 }
1088 // recursively compensate pattern fill if it's not to be transformed
1089 if (prefs_get_int_attribute("options.transform", "pattern", 1) == 0) {
1090 sp_item_adjust_paint_recursive (item, advertized_transform.inverse(), NR::identity(), true);
1091 }
1092 /// \todo FIXME: add the same else branch as for gradients below, to convert patterns to userSpaceOnUse as well
1093 /// recursively compensate gradient fill if it's not to be transformed
1094 if (prefs_get_int_attribute("options.transform", "gradient", 1) == 0) {
1095 sp_item_adjust_paint_recursive (item, advertized_transform.inverse(), NR::identity(), false);
1096 } else {
1097 // this converts the gradient/pattern fill/stroke, if any, to userSpaceOnUse; we need to do
1098 // it here _before_ the new transform is set, so as to use the pre-transform bbox
1099 sp_item_adjust_paint_recursive (item, NR::identity(), NR::identity(), false);
1100 }
1102 // run the object's set_transform if transforms are stored optimized
1103 gint preserve = prefs_get_int_attribute("options.preservetransform", "value", 0);
1104 NR::Matrix transform_attr (transform);
1105 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->set_transform && !preserve) {
1106 transform_attr = ((SPItemClass *) G_OBJECT_GET_CLASS(item))->set_transform(item, transform);
1107 }
1108 sp_item_set_item_transform(item, transform_attr);
1110 // Note: updateRepr comes before emitting the transformed signal since
1111 // it causes clone SPUse's copy of the original object to brought up to
1112 // date with the original. Otherwise, sp_use_bbox returns incorrect
1113 // values if called in code handling the transformed signal.
1114 SP_OBJECT(item)->updateRepr();
1116 // send the relative transform with a _transformed_signal
1117 item->_transformed_signal.emit(&advertized_transform, item);
1118 }
1120 gint
1121 sp_item_event(SPItem *item, SPEvent *event)
1122 {
1123 g_return_val_if_fail(item != NULL, FALSE);
1124 g_return_val_if_fail(SP_IS_ITEM(item), FALSE);
1125 g_return_val_if_fail(event != NULL, FALSE);
1127 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->event)
1128 return ((SPItemClass *) G_OBJECT_GET_CLASS(item))->event(item, event);
1130 return FALSE;
1131 }
1133 /**
1134 * Sets item private transform (not propagated to repr), without compensating stroke widths,
1135 * gradients, patterns as sp_item_write_transform does.
1136 */
1137 void
1138 sp_item_set_item_transform(SPItem *item, NR::Matrix const &transform)
1139 {
1140 g_return_if_fail(item != NULL);
1141 g_return_if_fail(SP_IS_ITEM(item));
1143 if (!matrix_equalp(transform, item->transform, NR_EPSILON)) {
1144 item->transform = transform;
1145 /* The SP_OBJECT_USER_MODIFIED_FLAG_B is used to mark the fact that it's only a
1146 transformation. It's apparently not used anywhere else. */
1147 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_USER_MODIFIED_FLAG_B);
1148 sp_item_rm_unsatisfied_cns(*item);
1149 }
1150 }
1153 /**
1154 * \pre \a ancestor really is an ancestor (\>=) of \a object, or NULL.
1155 * ("Ancestor (\>=)" here includes as far as \a object itself.)
1156 */
1157 NR::Matrix
1158 i2anc_affine(SPObject const *object, SPObject const *const ancestor) {
1159 NR::Matrix ret(NR::identity());
1160 g_return_val_if_fail(object != NULL, ret);
1162 /* stop at first non-renderable ancestor */
1163 while ( object != ancestor && SP_IS_ITEM(object) ) {
1164 if (SP_IS_ROOT(object)) {
1165 ret *= SP_ROOT(object)->c2p;
1166 }
1167 ret *= SP_ITEM(object)->transform;
1168 object = SP_OBJECT_PARENT(object);
1169 }
1170 return ret;
1171 }
1173 NR::Matrix
1174 i2i_affine(SPObject const *src, SPObject const *dest) {
1175 g_return_val_if_fail(src != NULL && dest != NULL, NR::identity());
1176 SPObject const *ancestor = src->nearestCommonAncestor(dest);
1177 return i2anc_affine(src, ancestor) / i2anc_affine(dest, ancestor);
1178 }
1180 NR::Matrix SPItem::getRelativeTransform(SPObject const *dest) const {
1181 return i2i_affine(this, dest);
1182 }
1184 /**
1185 * Returns the accumulated transformation of the item and all its ancestors, including root's viewport.
1186 * \pre (item != NULL) and SP_IS_ITEM(item).
1187 */
1188 NR::Matrix sp_item_i2doc_affine(SPItem const *item)
1189 {
1190 return i2anc_affine(item, NULL);
1191 }
1193 /**
1194 * Returns the accumulated transformation of the item and all its ancestors, but excluding root's viewport.
1195 * Used in path operations mostly.
1196 * \pre (item != NULL) and SP_IS_ITEM(item).
1197 */
1198 NR::Matrix sp_item_i2root_affine(SPItem const *item)
1199 {
1200 g_assert(item != NULL);
1201 g_assert(SP_IS_ITEM(item));
1203 NR::Matrix ret(NR::identity());
1204 g_assert(ret.test_identity());
1205 while ( NULL != SP_OBJECT_PARENT(item) ) {
1206 ret *= item->transform;
1207 item = SP_ITEM(SP_OBJECT_PARENT(item));
1208 }
1209 g_assert(SP_IS_ROOT(item));
1211 ret *= item->transform;
1213 return ret;
1214 }
1216 /* fixme: This is EVIL!!! */
1218 NR::Matrix sp_item_i2d_affine(SPItem const *item)
1219 {
1220 g_assert(item != NULL);
1221 g_assert(SP_IS_ITEM(item));
1223 NR::Matrix const ret( sp_item_i2doc_affine(item)
1224 * NR::scale(1, -1)
1225 * NR::translate(0, sp_document_height(SP_OBJECT_DOCUMENT(item))) );
1226 return ret;
1227 }
1229 // same as i2d but with i2root instead of i2doc
1230 NR::Matrix sp_item_i2r_affine(SPItem const *item)
1231 {
1232 g_assert(item != NULL);
1233 g_assert(SP_IS_ITEM(item));
1235 NR::Matrix const ret( sp_item_i2root_affine(item)
1236 * NR::scale(1, -1)
1237 * NR::translate(0, sp_document_height(SP_OBJECT_DOCUMENT(item))) );
1238 return ret;
1239 }
1241 /**
1242 * Converts a matrix \a m into the desktop coords of the \a item.
1243 * Will become a noop when we eliminate the coordinate flipping.
1244 */
1245 NR::Matrix matrix_to_desktop(NR::Matrix const m, SPItem const *item)
1246 {
1247 NR::Matrix const ret(m
1248 * NR::translate(0, -sp_document_height(SP_OBJECT_DOCUMENT(item)))
1249 * NR::scale(1, -1));
1250 return ret;
1251 }
1253 /**
1254 * Converts a matrix \a m from the desktop coords of the \a item.
1255 * Will become a noop when we eliminate the coordinate flipping.
1256 */
1257 NR::Matrix matrix_from_desktop(NR::Matrix const m, SPItem const *item)
1258 {
1259 NR::Matrix const ret(NR::scale(1, -1)
1260 * NR::translate(0, sp_document_height(SP_OBJECT_DOCUMENT(item)))
1261 * m);
1262 return ret;
1263 }
1265 void sp_item_set_i2d_affine(SPItem *item, NR::Matrix const &i2dt)
1266 {
1267 g_return_if_fail( item != NULL );
1268 g_return_if_fail( SP_IS_ITEM(item) );
1270 NR::Matrix dt2p; /* desktop to item parent transform */
1271 if (SP_OBJECT_PARENT(item)) {
1272 dt2p = sp_item_i2d_affine((SPItem *) SP_OBJECT_PARENT(item)).inverse();
1273 } else {
1274 dt2p = ( NR::translate(0, -sp_document_height(SP_OBJECT_DOCUMENT(item)))
1275 * NR::scale(1, -1) );
1276 }
1278 NR::Matrix const i2p( i2dt * dt2p );
1279 sp_item_set_item_transform(item, i2p);
1280 }
1283 NR::Matrix
1284 sp_item_dt2i_affine(SPItem const *item)
1285 {
1286 /* fixme: Implement the right way (Lauris) */
1287 return sp_item_i2d_affine(item).inverse();
1288 }
1290 /* Item views */
1292 static SPItemView *
1293 sp_item_view_new_prepend(SPItemView *list, SPItem *item, unsigned flags, unsigned key, NRArenaItem *arenaitem)
1294 {
1295 SPItemView *new_view;
1297 g_assert(item != NULL);
1298 g_assert(SP_IS_ITEM(item));
1299 g_assert(arenaitem != NULL);
1300 g_assert(NR_IS_ARENA_ITEM(arenaitem));
1302 new_view = g_new(SPItemView, 1);
1304 new_view->next = list;
1305 new_view->flags = flags;
1306 new_view->key = key;
1307 new_view->arenaitem = nr_arena_item_ref(arenaitem);
1309 return new_view;
1310 }
1312 static SPItemView *
1313 sp_item_view_list_remove(SPItemView *list, SPItemView *view)
1314 {
1315 if (view == list) {
1316 list = list->next;
1317 } else {
1318 SPItemView *prev;
1319 prev = list;
1320 while (prev->next != view) prev = prev->next;
1321 prev->next = view->next;
1322 }
1324 nr_arena_item_unref(view->arenaitem);
1325 g_free(view);
1327 return list;
1328 }
1330 /**
1331 * Return the arenaitem corresponding to the given item in the display
1332 * with the given key
1333 */
1334 NRArenaItem *
1335 sp_item_get_arenaitem(SPItem *item, unsigned key)
1336 {
1337 for ( SPItemView *iv = item->display ; iv ; iv = iv->next ) {
1338 if ( iv->key == key ) {
1339 return iv->arenaitem;
1340 }
1341 }
1343 return NULL;
1344 }
1346 int
1347 sp_item_repr_compare_position(SPItem *first, SPItem *second)
1348 {
1349 return sp_repr_compare_position(SP_OBJECT_REPR(first),
1350 SP_OBJECT_REPR(second));
1351 }
1353 SPItem *
1354 sp_item_first_item_child (SPObject *obj)
1355 {
1356 for ( SPObject *iter = sp_object_first_child(obj) ; iter ; iter = SP_OBJECT_NEXT(iter)) {
1357 if (SP_IS_ITEM (iter))
1358 return SP_ITEM (iter);
1359 }
1360 return NULL;
1361 }
1364 /*
1365 Local Variables:
1366 mode:c++
1367 c-file-style:"stroustrup"
1368 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1369 indent-tabs-mode:nil
1370 fill-column:99
1371 End:
1372 */
1373 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :