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 } else {
459 item->transform_center_x = 0;
460 }
461 break;
462 case SP_ATTR_TRANSFORM_CENTER_Y:
463 if (value) {
464 item->transform_center_y = g_strtod(value, NULL);
465 } else {
466 item->transform_center_y = 0;
467 }
468 break;
469 default:
470 if (SP_ATTRIBUTE_IS_CSS(key)) {
471 sp_style_read_from_object(object->style, object);
472 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
473 } else {
474 if (((SPObjectClass *) (parent_class))->set) {
475 (* ((SPObjectClass *) (parent_class))->set)(object, key, value);
476 }
477 }
478 break;
479 }
480 }
482 static void
483 clip_ref_changed(SPObject *old_clip, SPObject *clip, SPItem *item)
484 {
485 if (old_clip) {
486 SPItemView *v;
487 /* Hide clippath */
488 for (v = item->display; v != NULL; v = v->next) {
489 sp_clippath_hide(SP_CLIPPATH(old_clip), NR_ARENA_ITEM_GET_KEY(v->arenaitem));
490 nr_arena_item_set_clip(v->arenaitem, NULL);
491 }
492 }
493 if (SP_IS_CLIPPATH(clip)) {
494 NRRect bbox;
495 sp_item_invoke_bbox(item, &bbox, NR::identity(), TRUE);
496 for (SPItemView *v = item->display; v != NULL; v = v->next) {
497 if (!v->arenaitem->key) {
498 NR_ARENA_ITEM_SET_KEY(v->arenaitem, sp_item_display_key_new(3));
499 }
500 NRArenaItem *ai = sp_clippath_show(SP_CLIPPATH(clip),
501 NR_ARENA_ITEM_ARENA(v->arenaitem),
502 NR_ARENA_ITEM_GET_KEY(v->arenaitem));
503 nr_arena_item_set_clip(v->arenaitem, ai);
504 nr_arena_item_unref(ai);
505 sp_clippath_set_bbox(SP_CLIPPATH(clip), NR_ARENA_ITEM_GET_KEY(v->arenaitem), &bbox);
506 }
507 }
508 }
510 static void
511 mask_ref_changed(SPObject *old_mask, SPObject *mask, SPItem *item)
512 {
513 if (old_mask) {
514 /* Hide mask */
515 for (SPItemView *v = item->display; v != NULL; v = v->next) {
516 sp_mask_hide(SP_MASK(old_mask), NR_ARENA_ITEM_GET_KEY(v->arenaitem));
517 nr_arena_item_set_mask(v->arenaitem, NULL);
518 }
519 }
520 if (SP_IS_MASK(mask)) {
521 NRRect bbox;
522 sp_item_invoke_bbox(item, &bbox, NR::identity(), TRUE);
523 for (SPItemView *v = item->display; v != NULL; v = v->next) {
524 if (!v->arenaitem->key) {
525 NR_ARENA_ITEM_SET_KEY(v->arenaitem, sp_item_display_key_new(3));
526 }
527 NRArenaItem *ai = sp_mask_show(SP_MASK(mask),
528 NR_ARENA_ITEM_ARENA(v->arenaitem),
529 NR_ARENA_ITEM_GET_KEY(v->arenaitem));
530 nr_arena_item_set_mask(v->arenaitem, ai);
531 nr_arena_item_unref(ai);
532 sp_mask_set_bbox(SP_MASK(mask), NR_ARENA_ITEM_GET_KEY(v->arenaitem), &bbox);
533 }
534 }
535 }
537 static void
538 sp_item_update(SPObject *object, SPCtx *ctx, guint flags)
539 {
540 SPItem *item = SP_ITEM(object);
542 if (((SPObjectClass *) (parent_class))->update)
543 (* ((SPObjectClass *) (parent_class))->update)(object, ctx, flags);
545 if (flags & (SP_OBJECT_CHILD_MODIFIED_FLAG | SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG)) {
546 if (flags & SP_OBJECT_MODIFIED_FLAG) {
547 for (SPItemView *v = item->display; v != NULL; v = v->next) {
548 nr_arena_item_set_transform(v->arenaitem, item->transform);
549 }
550 }
552 SPClipPath *clip_path = item->clip_ref->getObject();
553 SPMask *mask = item->mask_ref->getObject();
555 if ( clip_path || mask ) {
556 NRRect bbox;
557 sp_item_invoke_bbox(item, &bbox, NR::identity(), TRUE);
558 if (clip_path) {
559 for (SPItemView *v = item->display; v != NULL; v = v->next) {
560 sp_clippath_set_bbox(clip_path, NR_ARENA_ITEM_GET_KEY(v->arenaitem), &bbox);
561 }
562 }
563 if (mask) {
564 for (SPItemView *v = item->display; v != NULL; v = v->next) {
565 sp_mask_set_bbox(mask, NR_ARENA_ITEM_GET_KEY(v->arenaitem), &bbox);
566 }
567 }
568 }
570 if (flags & SP_OBJECT_STYLE_MODIFIED_FLAG) {
571 for (SPItemView *v = item->display; v != NULL; v = v->next) {
572 nr_arena_item_set_opacity(v->arenaitem, SP_SCALE24_TO_FLOAT(object->style->opacity.value));
573 nr_arena_item_set_visible(v->arenaitem, !item->isHidden());
574 }
575 }
576 }
578 // Update libavoid with item geometry (for connector routing).
579 item->avoidRef->handleSettingChange();
580 }
582 static Inkscape::XML::Node *
583 sp_item_write(SPObject *const object, Inkscape::XML::Node *repr, guint flags)
584 {
585 SPItem *item = SP_ITEM(object);
587 gchar c[256];
588 if (sp_svg_transform_write(c, 256, item->transform)) {
589 repr->setAttribute("transform", c);
590 } else {
591 repr->setAttribute("transform", NULL);
592 }
594 SPObject const *const parent = SP_OBJECT_PARENT(object);
595 /** \todo Can someone please document why this is conditional on having
596 * a parent? The only parentless thing I can think of is the top-level
597 * <svg> element (SPRoot). SPRoot is derived from SPGroup, and can have
598 * style. I haven't looked at callers.
599 */
600 if (parent) {
601 SPStyle const *const obj_style = SP_OBJECT_STYLE(object);
602 if (obj_style) {
603 gchar *s = sp_style_write_string(obj_style, SP_STYLE_FLAG_IFSET);
604 repr->setAttribute("style", ( *s ? s : NULL ));
605 g_free(s);
606 } else {
607 /** \todo I'm not sure what to do in this case. Bug #1165868
608 * suggests that it can arise, but the submitter doesn't know
609 * how to do so reliably. The main two options are either
610 * leave repr's style attribute unchanged, or explicitly clear it.
611 * Must also consider what to do with property attributes for
612 * the element; see below.
613 */
614 char const *style_str = repr->attribute("style");
615 if (!style_str) {
616 style_str = "NULL";
617 }
618 g_warning("Item's style is NULL; repr style attribute is %s", style_str);
619 }
621 /** \note We treat object->style as authoritative. Its effects have
622 * been written to the style attribute above; any properties that are
623 * unset we take to be deliberately unset (e.g. so that clones can
624 * override the property).
625 *
626 * Note that the below has an undesirable consequence of changing the
627 * appearance on renderers that lack CSS support (e.g. SVG tiny);
628 * possibly we should write property attributes instead of a style
629 * attribute.
630 */
631 sp_style_unset_property_attrs (object);
632 }
634 if (flags & SP_OBJECT_WRITE_EXT) {
635 repr->setAttribute("sodipodi:insensitive", ( item->sensitive ? NULL : "true" ));
636 if (item->transform_center_x != 0)
637 sp_repr_set_svg_double (repr, "inkscape:transform-center-x", item->transform_center_x);
638 else
639 repr->setAttribute ("inkscape:transform-center-x", NULL);
640 if (item->transform_center_y != 0)
641 sp_repr_set_svg_double (repr, "inkscape:transform-center-y", item->transform_center_y);
642 else
643 repr->setAttribute ("inkscape:transform-center-y", NULL);
644 }
646 if (((SPObjectClass *) (parent_class))->write) {
647 ((SPObjectClass *) (parent_class))->write(object, repr, flags);
648 }
650 return repr;
651 }
653 NR::Rect SPItem::invokeBbox(NR::Matrix const &transform) const
654 {
655 NRRect r;
656 sp_item_invoke_bbox_full(this, &r, transform, 0, TRUE);
657 return NR::Rect(r);
658 }
660 void
661 sp_item_invoke_bbox(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const clear)
662 {
663 sp_item_invoke_bbox_full(item, bbox, transform, 0, clear);
664 }
666 void
667 sp_item_invoke_bbox_full(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags, unsigned const clear)
668 {
669 g_assert(item != NULL);
670 g_assert(SP_IS_ITEM(item));
671 g_assert(bbox != NULL);
673 if (clear) {
674 bbox->x0 = bbox->y0 = 1e18;
675 bbox->x1 = bbox->y1 = -1e18;
676 }
678 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->bbox) {
679 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->bbox(item, bbox, transform, flags);
680 }
681 }
683 unsigned sp_item_pos_in_parent(SPItem *item)
684 {
685 g_assert(item != NULL);
686 g_assert(SP_IS_ITEM(item));
688 SPObject *parent = SP_OBJECT_PARENT(item);
689 g_assert(parent != NULL);
690 g_assert(SP_IS_OBJECT(parent));
692 SPObject *object = SP_OBJECT(item);
694 unsigned pos=0;
695 for ( SPObject *iter = sp_object_first_child(parent) ; iter ; iter = SP_OBJECT_NEXT(iter)) {
696 if ( iter == object ) {
697 return pos;
698 }
699 if (SP_IS_ITEM(iter)) {
700 pos++;
701 }
702 }
704 g_assert_not_reached();
705 return 0;
706 }
708 void
709 sp_item_bbox_desktop(SPItem *item, NRRect *bbox)
710 {
711 g_assert(item != NULL);
712 g_assert(SP_IS_ITEM(item));
713 g_assert(bbox != NULL);
715 sp_item_invoke_bbox(item, bbox, sp_item_i2d_affine(item), TRUE);
716 }
718 NR::Rect sp_item_bbox_desktop(SPItem *item)
719 {
720 NRRect ret;
721 sp_item_bbox_desktop(item, &ret);
722 return NR::Rect(ret);
723 }
725 static void sp_item_private_snappoints(SPItem const *item, SnapPointsIter p)
726 {
727 NR::Rect const bbox = item->invokeBbox(sp_item_i2d_affine(item));
728 /* Just a pair of opposite corners of the bounding box suffices given that we don't yet
729 support angled guide lines. */
731 *p = bbox.min();
732 *p = bbox.max();
733 }
735 void sp_item_snappoints(SPItem const *item, SnapPointsIter p)
736 {
737 g_assert (item != NULL);
738 g_assert (SP_IS_ITEM(item));
740 SPItemClass const &item_class = *(SPItemClass const *) G_OBJECT_GET_CLASS(item);
741 if (item_class.snappoints) {
742 item_class.snappoints(item, p);
743 }
744 }
746 void
747 sp_item_invoke_print(SPItem *item, SPPrintContext *ctx)
748 {
749 if (!item->isHidden()) {
750 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->print) {
751 if (!item->transform.test_identity()
752 || SP_OBJECT_STYLE(item)->opacity.value != SP_SCALE24_MAX)
753 {
754 sp_print_bind(ctx, item->transform, SP_SCALE24_TO_FLOAT(SP_OBJECT_STYLE(item)->opacity.value));
755 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->print(item, ctx);
756 sp_print_release(ctx);
757 } else {
758 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->print(item, ctx);
759 }
760 }
761 }
762 }
764 static gchar *
765 sp_item_private_description(SPItem *item)
766 {
767 return g_strdup(_("Object"));
768 }
770 /**
771 * Returns a string suitable for status bar, formatted in pango markup language.
772 *
773 * Must be freed by caller.
774 */
775 gchar *
776 sp_item_description(SPItem *item)
777 {
778 g_assert(item != NULL);
779 g_assert(SP_IS_ITEM(item));
781 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->description) {
782 return ((SPItemClass *) G_OBJECT_GET_CLASS(item))->description(item);
783 }
785 g_assert_not_reached();
786 return NULL;
787 }
789 /**
790 * Allocates unique integer keys.
791 * \param numkeys Number of keys required.
792 * \return First allocated key; hence if the returned key is n
793 * you can use n, n + 1, ..., n + (numkeys - 1)
794 */
795 unsigned
796 sp_item_display_key_new(unsigned numkeys)
797 {
798 static unsigned dkey = 0;
800 dkey += numkeys;
802 return dkey - numkeys;
803 }
805 NRArenaItem *
806 sp_item_invoke_show(SPItem *item, NRArena *arena, unsigned key, unsigned flags)
807 {
808 g_assert(item != NULL);
809 g_assert(SP_IS_ITEM(item));
810 g_assert(arena != NULL);
811 g_assert(NR_IS_ARENA(arena));
813 NRArenaItem *ai = NULL;
814 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->show) {
815 ai = ((SPItemClass *) G_OBJECT_GET_CLASS(item))->show(item, arena, key, flags);
816 }
818 if (ai != NULL) {
819 item->display = sp_item_view_new_prepend(item->display, item, flags, key, ai);
820 nr_arena_item_set_transform(ai, item->transform);
821 nr_arena_item_set_opacity(ai, SP_SCALE24_TO_FLOAT(SP_OBJECT_STYLE(item)->opacity.value));
822 nr_arena_item_set_visible(ai, !item->isHidden());
823 nr_arena_item_set_sensitive(ai, item->sensitive);
824 if (item->clip_ref->getObject()) {
825 NRArenaItem *ac;
826 if (!item->display->arenaitem->key) NR_ARENA_ITEM_SET_KEY(item->display->arenaitem, sp_item_display_key_new(3));
827 ac = sp_clippath_show(item->clip_ref->getObject(), arena, NR_ARENA_ITEM_GET_KEY(item->display->arenaitem));
828 nr_arena_item_set_clip(ai, ac);
829 nr_arena_item_unref(ac);
830 }
831 if (item->mask_ref->getObject()) {
832 NRArenaItem *ac;
833 if (!item->display->arenaitem->key) NR_ARENA_ITEM_SET_KEY(item->display->arenaitem, sp_item_display_key_new(3));
834 ac = sp_mask_show(item->mask_ref->getObject(), arena, NR_ARENA_ITEM_GET_KEY(item->display->arenaitem));
835 nr_arena_item_set_mask(ai, ac);
836 nr_arena_item_unref(ac);
837 }
838 NR_ARENA_ITEM_SET_DATA(ai, item);
839 }
841 return ai;
842 }
844 void
845 sp_item_invoke_hide(SPItem *item, unsigned key)
846 {
847 g_assert(item != NULL);
848 g_assert(SP_IS_ITEM(item));
850 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->hide) {
851 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->hide(item, key);
852 }
854 SPItemView *ref = NULL;
855 SPItemView *v = item->display;
856 while (v != NULL) {
857 SPItemView *next = v->next;
858 if (v->key == key) {
859 if (item->clip_ref->getObject()) {
860 sp_clippath_hide(item->clip_ref->getObject(), NR_ARENA_ITEM_GET_KEY(v->arenaitem));
861 nr_arena_item_set_clip(v->arenaitem, NULL);
862 }
863 if (item->mask_ref->getObject()) {
864 sp_mask_hide(item->mask_ref->getObject(), NR_ARENA_ITEM_GET_KEY(v->arenaitem));
865 nr_arena_item_set_mask(v->arenaitem, NULL);
866 }
867 if (!ref) {
868 item->display = v->next;
869 } else {
870 ref->next = v->next;
871 }
872 nr_arena_item_unparent(v->arenaitem);
873 nr_arena_item_unref(v->arenaitem);
874 g_free(v);
875 } else {
876 ref = v;
877 }
878 v = next;
879 }
880 }
882 // Adjusters
884 void
885 sp_item_adjust_pattern (SPItem *item, NR::Matrix const &postmul, bool set)
886 {
887 SPStyle *style = SP_OBJECT_STYLE (item);
889 if (style && (style->fill.type == SP_PAINT_TYPE_PAINTSERVER)) {
890 SPObject *server = SP_OBJECT_STYLE_FILL_SERVER (item);
891 if (SP_IS_PATTERN (server)) {
892 SPPattern *pattern = sp_pattern_clone_if_necessary (item, SP_PATTERN (server), "fill");
893 sp_pattern_transform_multiply (pattern, postmul, set);
894 }
895 }
897 if (style && (style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)) {
898 SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER (item);
899 if (SP_IS_PATTERN (server)) {
900 SPPattern *pattern = sp_pattern_clone_if_necessary (item, SP_PATTERN (server), "stroke");
901 sp_pattern_transform_multiply (pattern, postmul, set);
902 }
903 }
905 }
907 void
908 sp_item_adjust_gradient (SPItem *item, NR::Matrix const &postmul, bool set)
909 {
910 SPStyle *style = SP_OBJECT_STYLE (item);
912 if (style && (style->fill.type == SP_PAINT_TYPE_PAINTSERVER)) {
913 SPObject *server = SP_OBJECT_STYLE_FILL_SERVER(item);
914 if (SP_IS_GRADIENT (server)) {
916 /**
917 * \note Bbox units for a gradient are generally a bad idea because
918 * with them, you cannot preserve the relative position of the
919 * object and its gradient after rotation or skew. So now we
920 * convert them to userspace units which are easy to keep in sync
921 * just by adding the object's transform to gradientTransform.
922 * \todo FIXME: convert back to bbox units after transforming with
923 * the item, so as to preserve the original units.
924 */
925 SPGradient *gradient = sp_gradient_convert_to_userspace (SP_GRADIENT (server), item, "fill");
927 sp_gradient_transform_multiply (gradient, postmul, set);
928 }
929 }
931 if (style && (style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)) {
932 SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER(item);
933 if (SP_IS_GRADIENT (server)) {
934 SPGradient *gradient = sp_gradient_convert_to_userspace (SP_GRADIENT (server), item, "stroke");
935 sp_gradient_transform_multiply (gradient, postmul, set);
936 }
937 }
938 }
940 void
941 sp_item_adjust_stroke (SPItem *item, gdouble ex)
942 {
943 SPStyle *style = SP_OBJECT_STYLE (item);
945 if (style && style->stroke.type != SP_PAINT_TYPE_NONE && !NR_DF_TEST_CLOSE (ex, 1.0, NR_EPSILON)) {
947 style->stroke_width.computed *= ex;
948 style->stroke_width.set = TRUE;
950 if (style->stroke_dash.n_dash != 0) {
951 int i;
952 for (i = 0; i < style->stroke_dash.n_dash; i++) {
953 style->stroke_dash.dash[i] *= ex;
954 }
955 style->stroke_dash.offset *= ex;
956 }
958 SP_OBJECT(item)->updateRepr();
959 }
960 }
962 /**
963 * Find out the inverse of previous transform of an item (from its repr)
964 */
965 NR::Matrix
966 sp_item_transform_repr (SPItem *item)
967 {
968 NR::Matrix t_old(NR::identity());
969 gchar const *t_attr = SP_OBJECT_REPR(item)->attribute("transform");
970 if (t_attr) {
971 NR::Matrix t;
972 if (sp_svg_transform_read(t_attr, &t)) {
973 t_old = t;
974 }
975 }
977 return t_old;
978 }
981 /**
982 * Recursively scale stroke width in \a item and its children by \a expansion.
983 */
984 void
985 sp_item_adjust_stroke_width_recursive(SPItem *item, double expansion)
986 {
987 sp_item_adjust_stroke (item, expansion);
989 for (SPObject *o = SP_OBJECT(item)->children; o != NULL; o = o->next) {
990 if (SP_IS_ITEM(o))
991 sp_item_adjust_stroke_width_recursive(SP_ITEM(o), expansion);
992 }
993 }
995 /**
996 * Recursively adjust rx and ry of rects.
997 */
998 void
999 sp_item_adjust_rects_recursive(SPItem *item, NR::Matrix advertized_transform)
1000 {
1001 if (SP_IS_RECT (item)) {
1002 sp_rect_compensate_rxry (SP_RECT(item), advertized_transform);
1003 }
1005 for (SPObject *o = SP_OBJECT(item)->children; o != NULL; o = o->next) {
1006 if (SP_IS_ITEM(o))
1007 sp_item_adjust_rects_recursive(SP_ITEM(o), advertized_transform);
1008 }
1009 }
1011 /**
1012 * Recursively compensate pattern or gradient transform.
1013 */
1014 void
1015 sp_item_adjust_paint_recursive (SPItem *item, NR::Matrix advertized_transform, NR::Matrix t_ancestors, bool is_pattern)
1016 {
1017 // A clone must not touch the style (it's that of its parent!) and has no children, so quit now
1018 if (item && SP_IS_USE(item))
1019 return;
1021 // _Before_ full pattern/gradient transform: t_paint * t_item * t_ancestors
1022 // _After_ full pattern/gradient transform: t_paint_new * t_item * t_ancestors * advertised_transform
1023 // By equating these two expressions we get t_paint_new = t_paint * paint_delta, where:
1024 NR::Matrix t_item = sp_item_transform_repr (item);
1025 NR::Matrix paint_delta = t_item * t_ancestors * advertized_transform * t_ancestors.inverse() * t_item.inverse();
1027 if (is_pattern)
1028 sp_item_adjust_pattern (item, paint_delta);
1029 else
1030 sp_item_adjust_gradient (item, paint_delta);
1032 // Within text, we do not fork gradients, and so must not recurse to avoid double compensation
1033 if (item && SP_IS_TEXT(item))
1034 return;
1036 for (SPObject *o = SP_OBJECT(item)->children; o != NULL; o = o->next) {
1037 if (SP_IS_ITEM(o)) {
1038 // At the level of the transformed item, t_ancestors is identity;
1039 // below it, it is the accmmulated chain of transforms from this level to the top level
1040 sp_item_adjust_paint_recursive (SP_ITEM(o), advertized_transform, t_item * t_ancestors, is_pattern);
1041 }
1042 }
1043 }
1045 /**
1046 * A temporary wrapper for the next function accepting the NRMatrix
1047 * instead of NR::Matrix
1048 */
1049 void
1050 sp_item_write_transform(SPItem *item, Inkscape::XML::Node *repr, NRMatrix const *transform, NR::Matrix const *adv)
1051 {
1052 if (transform == NULL)
1053 sp_item_write_transform(item, repr, NR::identity(), adv);
1054 else
1055 sp_item_write_transform(item, repr, NR::Matrix (transform), adv);
1056 }
1058 /**
1059 * Set a new transform on an object.
1060 *
1061 * Compensate for stroke scaling and gradient/pattern fill transform, if
1062 * necessary. Call the object's set_transform method if transforms are
1063 * stored optimized. Send _transformed_signal. Invoke _write method so that
1064 * the repr is updated with the new transform.
1065 */
1066 void
1067 sp_item_write_transform(SPItem *item, Inkscape::XML::Node *repr, NR::Matrix const &transform, NR::Matrix const *adv)
1068 {
1069 g_return_if_fail(item != NULL);
1070 g_return_if_fail(SP_IS_ITEM(item));
1071 g_return_if_fail(repr != NULL);
1073 // calculate the relative transform, if not given by the adv attribute
1074 NR::Matrix advertized_transform;
1075 if (adv != NULL) {
1076 advertized_transform = *adv;
1077 } else {
1078 advertized_transform = sp_item_transform_repr (item).inverse() * transform;
1079 }
1081 // recursively compensate for stroke scaling, depending on user preference
1082 if (prefs_get_int_attribute("options.transform", "stroke", 1) == 0) {
1083 double const expansion = 1. / NR::expansion(advertized_transform);
1084 sp_item_adjust_stroke_width_recursive(item, expansion);
1085 }
1087 // recursively compensate rx/ry of a rect if requested
1088 if (prefs_get_int_attribute("options.transform", "rectcorners", 1) == 0) {
1089 sp_item_adjust_rects_recursive(item, advertized_transform);
1090 }
1092 // recursively compensate pattern fill if it's not to be transformed
1093 if (prefs_get_int_attribute("options.transform", "pattern", 1) == 0) {
1094 sp_item_adjust_paint_recursive (item, advertized_transform.inverse(), NR::identity(), true);
1095 }
1096 /// \todo FIXME: add the same else branch as for gradients below, to convert patterns to userSpaceOnUse as well
1097 /// recursively compensate gradient fill if it's not to be transformed
1098 if (prefs_get_int_attribute("options.transform", "gradient", 1) == 0) {
1099 sp_item_adjust_paint_recursive (item, advertized_transform.inverse(), NR::identity(), false);
1100 } else {
1101 // this converts the gradient/pattern fill/stroke, if any, to userSpaceOnUse; we need to do
1102 // it here _before_ the new transform is set, so as to use the pre-transform bbox
1103 sp_item_adjust_paint_recursive (item, NR::identity(), NR::identity(), false);
1104 }
1106 // run the object's set_transform if transforms are stored optimized
1107 gint preserve = prefs_get_int_attribute("options.preservetransform", "value", 0);
1108 NR::Matrix transform_attr (transform);
1109 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->set_transform && !preserve) {
1110 transform_attr = ((SPItemClass *) G_OBJECT_GET_CLASS(item))->set_transform(item, transform);
1111 }
1112 sp_item_set_item_transform(item, transform_attr);
1114 // Note: updateRepr comes before emitting the transformed signal since
1115 // it causes clone SPUse's copy of the original object to brought up to
1116 // date with the original. Otherwise, sp_use_bbox returns incorrect
1117 // values if called in code handling the transformed signal.
1118 SP_OBJECT(item)->updateRepr();
1120 // send the relative transform with a _transformed_signal
1121 item->_transformed_signal.emit(&advertized_transform, item);
1122 }
1124 gint
1125 sp_item_event(SPItem *item, SPEvent *event)
1126 {
1127 g_return_val_if_fail(item != NULL, FALSE);
1128 g_return_val_if_fail(SP_IS_ITEM(item), FALSE);
1129 g_return_val_if_fail(event != NULL, FALSE);
1131 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->event)
1132 return ((SPItemClass *) G_OBJECT_GET_CLASS(item))->event(item, event);
1134 return FALSE;
1135 }
1137 /**
1138 * Sets item private transform (not propagated to repr), without compensating stroke widths,
1139 * gradients, patterns as sp_item_write_transform does.
1140 */
1141 void
1142 sp_item_set_item_transform(SPItem *item, NR::Matrix const &transform)
1143 {
1144 g_return_if_fail(item != NULL);
1145 g_return_if_fail(SP_IS_ITEM(item));
1147 if (!matrix_equalp(transform, item->transform, NR_EPSILON)) {
1148 item->transform = transform;
1149 /* The SP_OBJECT_USER_MODIFIED_FLAG_B is used to mark the fact that it's only a
1150 transformation. It's apparently not used anywhere else. */
1151 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_USER_MODIFIED_FLAG_B);
1152 sp_item_rm_unsatisfied_cns(*item);
1153 }
1154 }
1157 /**
1158 * \pre \a ancestor really is an ancestor (\>=) of \a object, or NULL.
1159 * ("Ancestor (\>=)" here includes as far as \a object itself.)
1160 */
1161 NR::Matrix
1162 i2anc_affine(SPObject const *object, SPObject const *const ancestor) {
1163 NR::Matrix ret(NR::identity());
1164 g_return_val_if_fail(object != NULL, ret);
1166 /* stop at first non-renderable ancestor */
1167 while ( object != ancestor && SP_IS_ITEM(object) ) {
1168 if (SP_IS_ROOT(object)) {
1169 ret *= SP_ROOT(object)->c2p;
1170 }
1171 ret *= SP_ITEM(object)->transform;
1172 object = SP_OBJECT_PARENT(object);
1173 }
1174 return ret;
1175 }
1177 NR::Matrix
1178 i2i_affine(SPObject const *src, SPObject const *dest) {
1179 g_return_val_if_fail(src != NULL && dest != NULL, NR::identity());
1180 SPObject const *ancestor = src->nearestCommonAncestor(dest);
1181 return i2anc_affine(src, ancestor) / i2anc_affine(dest, ancestor);
1182 }
1184 NR::Matrix SPItem::getRelativeTransform(SPObject const *dest) const {
1185 return i2i_affine(this, dest);
1186 }
1188 /**
1189 * Returns the accumulated transformation of the item and all its ancestors, including root's viewport.
1190 * \pre (item != NULL) and SP_IS_ITEM(item).
1191 */
1192 NR::Matrix sp_item_i2doc_affine(SPItem const *item)
1193 {
1194 return i2anc_affine(item, NULL);
1195 }
1197 /**
1198 * Returns the accumulated transformation of the item and all its ancestors, but excluding root's viewport.
1199 * Used in path operations mostly.
1200 * \pre (item != NULL) and SP_IS_ITEM(item).
1201 */
1202 NR::Matrix sp_item_i2root_affine(SPItem const *item)
1203 {
1204 g_assert(item != NULL);
1205 g_assert(SP_IS_ITEM(item));
1207 NR::Matrix ret(NR::identity());
1208 g_assert(ret.test_identity());
1209 while ( NULL != SP_OBJECT_PARENT(item) ) {
1210 ret *= item->transform;
1211 item = SP_ITEM(SP_OBJECT_PARENT(item));
1212 }
1213 g_assert(SP_IS_ROOT(item));
1215 ret *= item->transform;
1217 return ret;
1218 }
1220 /* fixme: This is EVIL!!! */
1222 NR::Matrix sp_item_i2d_affine(SPItem const *item)
1223 {
1224 g_assert(item != NULL);
1225 g_assert(SP_IS_ITEM(item));
1227 NR::Matrix const ret( sp_item_i2doc_affine(item)
1228 * NR::scale(1, -1)
1229 * NR::translate(0, sp_document_height(SP_OBJECT_DOCUMENT(item))) );
1230 return ret;
1231 }
1233 // same as i2d but with i2root instead of i2doc
1234 NR::Matrix sp_item_i2r_affine(SPItem const *item)
1235 {
1236 g_assert(item != NULL);
1237 g_assert(SP_IS_ITEM(item));
1239 NR::Matrix const ret( sp_item_i2root_affine(item)
1240 * NR::scale(1, -1)
1241 * NR::translate(0, sp_document_height(SP_OBJECT_DOCUMENT(item))) );
1242 return ret;
1243 }
1245 /**
1246 * Converts a matrix \a m into the desktop coords of the \a item.
1247 * Will become a noop when we eliminate the coordinate flipping.
1248 */
1249 NR::Matrix matrix_to_desktop(NR::Matrix const m, SPItem const *item)
1250 {
1251 NR::Matrix const ret(m
1252 * NR::translate(0, -sp_document_height(SP_OBJECT_DOCUMENT(item)))
1253 * NR::scale(1, -1));
1254 return ret;
1255 }
1257 /**
1258 * Converts a matrix \a m from the desktop coords of the \a item.
1259 * Will become a noop when we eliminate the coordinate flipping.
1260 */
1261 NR::Matrix matrix_from_desktop(NR::Matrix const m, SPItem const *item)
1262 {
1263 NR::Matrix const ret(NR::scale(1, -1)
1264 * NR::translate(0, sp_document_height(SP_OBJECT_DOCUMENT(item)))
1265 * m);
1266 return ret;
1267 }
1269 void sp_item_set_i2d_affine(SPItem *item, NR::Matrix const &i2dt)
1270 {
1271 g_return_if_fail( item != NULL );
1272 g_return_if_fail( SP_IS_ITEM(item) );
1274 NR::Matrix dt2p; /* desktop to item parent transform */
1275 if (SP_OBJECT_PARENT(item)) {
1276 dt2p = sp_item_i2d_affine((SPItem *) SP_OBJECT_PARENT(item)).inverse();
1277 } else {
1278 dt2p = ( NR::translate(0, -sp_document_height(SP_OBJECT_DOCUMENT(item)))
1279 * NR::scale(1, -1) );
1280 }
1282 NR::Matrix const i2p( i2dt * dt2p );
1283 sp_item_set_item_transform(item, i2p);
1284 }
1287 NR::Matrix
1288 sp_item_dt2i_affine(SPItem const *item)
1289 {
1290 /* fixme: Implement the right way (Lauris) */
1291 return sp_item_i2d_affine(item).inverse();
1292 }
1294 /* Item views */
1296 static SPItemView *
1297 sp_item_view_new_prepend(SPItemView *list, SPItem *item, unsigned flags, unsigned key, NRArenaItem *arenaitem)
1298 {
1299 SPItemView *new_view;
1301 g_assert(item != NULL);
1302 g_assert(SP_IS_ITEM(item));
1303 g_assert(arenaitem != NULL);
1304 g_assert(NR_IS_ARENA_ITEM(arenaitem));
1306 new_view = g_new(SPItemView, 1);
1308 new_view->next = list;
1309 new_view->flags = flags;
1310 new_view->key = key;
1311 new_view->arenaitem = nr_arena_item_ref(arenaitem);
1313 return new_view;
1314 }
1316 static SPItemView *
1317 sp_item_view_list_remove(SPItemView *list, SPItemView *view)
1318 {
1319 if (view == list) {
1320 list = list->next;
1321 } else {
1322 SPItemView *prev;
1323 prev = list;
1324 while (prev->next != view) prev = prev->next;
1325 prev->next = view->next;
1326 }
1328 nr_arena_item_unref(view->arenaitem);
1329 g_free(view);
1331 return list;
1332 }
1334 /**
1335 * Return the arenaitem corresponding to the given item in the display
1336 * with the given key
1337 */
1338 NRArenaItem *
1339 sp_item_get_arenaitem(SPItem *item, unsigned key)
1340 {
1341 for ( SPItemView *iv = item->display ; iv ; iv = iv->next ) {
1342 if ( iv->key == key ) {
1343 return iv->arenaitem;
1344 }
1345 }
1347 return NULL;
1348 }
1350 int
1351 sp_item_repr_compare_position(SPItem *first, SPItem *second)
1352 {
1353 return sp_repr_compare_position(SP_OBJECT_REPR(first),
1354 SP_OBJECT_REPR(second));
1355 }
1357 SPItem *
1358 sp_item_first_item_child (SPObject *obj)
1359 {
1360 for ( SPObject *iter = sp_object_first_child(obj) ; iter ; iter = SP_OBJECT_NEXT(iter)) {
1361 if (SP_IS_ITEM (iter))
1362 return SP_ITEM (iter);
1363 }
1364 return NULL;
1365 }
1368 /*
1369 Local Variables:
1370 mode:c++
1371 c-file-style:"stroustrup"
1372 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1373 indent-tabs-mode:nil
1374 fill-column:99
1375 End:
1376 */
1377 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :