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 "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 SP_OBJECT(clip)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
507 }
508 }
509 }
511 static void
512 mask_ref_changed(SPObject *old_mask, SPObject *mask, SPItem *item)
513 {
514 if (old_mask) {
515 /* Hide mask */
516 for (SPItemView *v = item->display; v != NULL; v = v->next) {
517 sp_mask_hide(SP_MASK(old_mask), NR_ARENA_ITEM_GET_KEY(v->arenaitem));
518 nr_arena_item_set_mask(v->arenaitem, NULL);
519 }
520 }
521 if (SP_IS_MASK(mask)) {
522 NRRect bbox;
523 sp_item_invoke_bbox(item, &bbox, NR::identity(), TRUE);
524 for (SPItemView *v = item->display; v != NULL; v = v->next) {
525 if (!v->arenaitem->key) {
526 NR_ARENA_ITEM_SET_KEY(v->arenaitem, sp_item_display_key_new(3));
527 }
528 NRArenaItem *ai = sp_mask_show(SP_MASK(mask),
529 NR_ARENA_ITEM_ARENA(v->arenaitem),
530 NR_ARENA_ITEM_GET_KEY(v->arenaitem));
531 nr_arena_item_set_mask(v->arenaitem, ai);
532 nr_arena_item_unref(ai);
533 sp_mask_set_bbox(SP_MASK(mask), NR_ARENA_ITEM_GET_KEY(v->arenaitem), &bbox);
534 SP_OBJECT(mask)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
535 }
536 }
537 }
539 static void
540 sp_item_update(SPObject *object, SPCtx *ctx, guint flags)
541 {
542 SPItem *item = SP_ITEM(object);
544 if (((SPObjectClass *) (parent_class))->update)
545 (* ((SPObjectClass *) (parent_class))->update)(object, ctx, flags);
547 if (flags & (SP_OBJECT_CHILD_MODIFIED_FLAG | SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG)) {
548 if (flags & SP_OBJECT_MODIFIED_FLAG) {
549 for (SPItemView *v = item->display; v != NULL; v = v->next) {
550 nr_arena_item_set_transform(v->arenaitem, item->transform);
551 }
552 }
554 SPClipPath *clip_path = item->clip_ref->getObject();
555 SPMask *mask = item->mask_ref->getObject();
557 if ( clip_path || mask ) {
558 NRRect bbox;
559 sp_item_invoke_bbox(item, &bbox, NR::identity(), TRUE);
560 if (clip_path) {
561 for (SPItemView *v = item->display; v != NULL; v = v->next) {
562 sp_clippath_set_bbox(clip_path, NR_ARENA_ITEM_GET_KEY(v->arenaitem), &bbox);
563 }
564 }
565 if (mask) {
566 for (SPItemView *v = item->display; v != NULL; v = v->next) {
567 sp_mask_set_bbox(mask, NR_ARENA_ITEM_GET_KEY(v->arenaitem), &bbox);
568 }
569 }
570 }
572 if (flags & SP_OBJECT_STYLE_MODIFIED_FLAG) {
573 for (SPItemView *v = item->display; v != NULL; v = v->next) {
574 nr_arena_item_set_opacity(v->arenaitem, SP_SCALE24_TO_FLOAT(object->style->opacity.value));
575 nr_arena_item_set_visible(v->arenaitem, !item->isHidden());
576 }
577 }
578 }
580 // Update libavoid with item geometry (for connector routing).
581 item->avoidRef->handleSettingChange();
582 }
584 static Inkscape::XML::Node *
585 sp_item_write(SPObject *const object, Inkscape::XML::Node *repr, guint flags)
586 {
587 SPItem *item = SP_ITEM(object);
589 gchar c[256];
590 if (sp_svg_transform_write(c, 256, item->transform)) {
591 repr->setAttribute("transform", c);
592 } else {
593 repr->setAttribute("transform", NULL);
594 }
596 SPObject const *const parent = SP_OBJECT_PARENT(object);
597 /** \todo Can someone please document why this is conditional on having
598 * a parent? The only parentless thing I can think of is the top-level
599 * <svg> element (SPRoot). SPRoot is derived from SPGroup, and can have
600 * style. I haven't looked at callers.
601 */
602 if (parent) {
603 SPStyle const *const obj_style = SP_OBJECT_STYLE(object);
604 if (obj_style) {
605 gchar *s = sp_style_write_string(obj_style, SP_STYLE_FLAG_IFSET);
606 repr->setAttribute("style", ( *s ? s : NULL ));
607 g_free(s);
608 } else {
609 /** \todo I'm not sure what to do in this case. Bug #1165868
610 * suggests that it can arise, but the submitter doesn't know
611 * how to do so reliably. The main two options are either
612 * leave repr's style attribute unchanged, or explicitly clear it.
613 * Must also consider what to do with property attributes for
614 * the element; see below.
615 */
616 char const *style_str = repr->attribute("style");
617 if (!style_str) {
618 style_str = "NULL";
619 }
620 g_warning("Item's style is NULL; repr style attribute is %s", style_str);
621 }
623 /** \note We treat object->style as authoritative. Its effects have
624 * been written to the style attribute above; any properties that are
625 * unset we take to be deliberately unset (e.g. so that clones can
626 * override the property).
627 *
628 * Note that the below has an undesirable consequence of changing the
629 * appearance on renderers that lack CSS support (e.g. SVG tiny);
630 * possibly we should write property attributes instead of a style
631 * attribute.
632 */
633 sp_style_unset_property_attrs (object);
634 }
636 if (flags & SP_OBJECT_WRITE_EXT) {
637 repr->setAttribute("sodipodi:insensitive", ( item->sensitive ? NULL : "true" ));
638 if (item->transform_center_x != 0)
639 sp_repr_set_svg_double (repr, "inkscape:transform-center-x", item->transform_center_x);
640 else
641 repr->setAttribute ("inkscape:transform-center-x", NULL);
642 if (item->transform_center_y != 0)
643 sp_repr_set_svg_double (repr, "inkscape:transform-center-y", item->transform_center_y);
644 else
645 repr->setAttribute ("inkscape:transform-center-y", NULL);
646 }
648 if (((SPObjectClass *) (parent_class))->write) {
649 ((SPObjectClass *) (parent_class))->write(object, repr, flags);
650 }
652 return repr;
653 }
655 NR::Rect SPItem::invokeBbox(NR::Matrix const &transform) const
656 {
657 NRRect r;
658 sp_item_invoke_bbox_full(this, &r, transform, 0, TRUE);
659 return NR::Rect(r);
660 }
662 void
663 sp_item_invoke_bbox(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const clear)
664 {
665 sp_item_invoke_bbox_full(item, bbox, transform, 0, clear);
666 }
668 void
669 sp_item_invoke_bbox_full(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags, unsigned const clear)
670 {
671 g_assert(item != NULL);
672 g_assert(SP_IS_ITEM(item));
673 g_assert(bbox != NULL);
675 if (clear) {
676 bbox->x0 = bbox->y0 = 1e18;
677 bbox->x1 = bbox->y1 = -1e18;
678 }
680 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->bbox) {
681 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->bbox(item, bbox, transform, flags);
682 }
684 // crop the bbox by clip path, if any
685 if (item->clip_ref->getObject()) {
686 NRRect b;
687 sp_clippath_get_bbox(SP_CLIPPATH(item->clip_ref->getObject()), &b, transform, flags);
688 nr_rect_d_intersect (bbox, bbox, &b);
689 }
690 }
692 unsigned sp_item_pos_in_parent(SPItem *item)
693 {
694 g_assert(item != NULL);
695 g_assert(SP_IS_ITEM(item));
697 SPObject *parent = SP_OBJECT_PARENT(item);
698 g_assert(parent != NULL);
699 g_assert(SP_IS_OBJECT(parent));
701 SPObject *object = SP_OBJECT(item);
703 unsigned pos=0;
704 for ( SPObject *iter = sp_object_first_child(parent) ; iter ; iter = SP_OBJECT_NEXT(iter)) {
705 if ( iter == object ) {
706 return pos;
707 }
708 if (SP_IS_ITEM(iter)) {
709 pos++;
710 }
711 }
713 g_assert_not_reached();
714 return 0;
715 }
717 void
718 sp_item_bbox_desktop(SPItem *item, NRRect *bbox)
719 {
720 g_assert(item != NULL);
721 g_assert(SP_IS_ITEM(item));
722 g_assert(bbox != NULL);
724 sp_item_invoke_bbox(item, bbox, sp_item_i2d_affine(item), TRUE);
725 }
727 NR::Rect sp_item_bbox_desktop(SPItem *item)
728 {
729 NRRect ret;
730 sp_item_bbox_desktop(item, &ret);
731 return NR::Rect(ret);
732 }
734 static void sp_item_private_snappoints(SPItem const *item, SnapPointsIter p)
735 {
736 NR::Rect const bbox = item->invokeBbox(sp_item_i2d_affine(item));
737 /* Just a pair of opposite corners of the bounding box suffices given that we don't yet
738 support angled guide lines. */
740 *p = bbox.min();
741 *p = bbox.max();
742 }
744 void sp_item_snappoints(SPItem const *item, SnapPointsIter p)
745 {
746 g_assert (item != NULL);
747 g_assert (SP_IS_ITEM(item));
749 SPItemClass const &item_class = *(SPItemClass const *) G_OBJECT_GET_CLASS(item);
750 if (item_class.snappoints) {
751 item_class.snappoints(item, p);
752 }
753 }
755 void
756 sp_item_invoke_print(SPItem *item, SPPrintContext *ctx)
757 {
758 if (!item->isHidden()) {
759 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->print) {
760 if (!item->transform.test_identity()
761 || SP_OBJECT_STYLE(item)->opacity.value != SP_SCALE24_MAX)
762 {
763 sp_print_bind(ctx, item->transform, SP_SCALE24_TO_FLOAT(SP_OBJECT_STYLE(item)->opacity.value));
764 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->print(item, ctx);
765 sp_print_release(ctx);
766 } else {
767 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->print(item, ctx);
768 }
769 }
770 }
771 }
773 static gchar *
774 sp_item_private_description(SPItem *item)
775 {
776 return g_strdup(_("Object"));
777 }
779 /**
780 * Returns a string suitable for status bar, formatted in pango markup language.
781 *
782 * Must be freed by caller.
783 */
784 gchar *
785 sp_item_description(SPItem *item)
786 {
787 g_assert(item != NULL);
788 g_assert(SP_IS_ITEM(item));
790 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->description) {
791 gchar *s = ((SPItemClass *) G_OBJECT_GET_CLASS(item))->description(item);
792 if (s && item->clip_ref->getObject()) {
793 gchar *snew = g_strdup_printf ("%s; <i>clipped</i>", s);
794 g_free (s);
795 s = snew;
796 }
797 if (s && item->mask_ref->getObject()) {
798 gchar *snew = g_strdup_printf ("%s; <i>masked</i>", s);
799 g_free (s);
800 s = snew;
801 }
802 return s;
803 }
805 g_assert_not_reached();
806 return NULL;
807 }
809 /**
810 * Allocates unique integer keys.
811 * \param numkeys Number of keys required.
812 * \return First allocated key; hence if the returned key is n
813 * you can use n, n + 1, ..., n + (numkeys - 1)
814 */
815 unsigned
816 sp_item_display_key_new(unsigned numkeys)
817 {
818 static unsigned dkey = 0;
820 dkey += numkeys;
822 return dkey - numkeys;
823 }
825 NRArenaItem *
826 sp_item_invoke_show(SPItem *item, NRArena *arena, unsigned key, unsigned flags)
827 {
828 g_assert(item != NULL);
829 g_assert(SP_IS_ITEM(item));
830 g_assert(arena != NULL);
831 g_assert(NR_IS_ARENA(arena));
833 NRArenaItem *ai = NULL;
834 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->show) {
835 ai = ((SPItemClass *) G_OBJECT_GET_CLASS(item))->show(item, arena, key, flags);
836 }
838 if (ai != NULL) {
839 item->display = sp_item_view_new_prepend(item->display, item, flags, key, ai);
840 nr_arena_item_set_transform(ai, item->transform);
841 nr_arena_item_set_opacity(ai, SP_SCALE24_TO_FLOAT(SP_OBJECT_STYLE(item)->opacity.value));
842 nr_arena_item_set_visible(ai, !item->isHidden());
843 nr_arena_item_set_sensitive(ai, item->sensitive);
844 if (item->clip_ref->getObject()) {
845 SPClipPath *cp = item->clip_ref->getObject();
847 if (!item->display->arenaitem->key) {
848 NR_ARENA_ITEM_SET_KEY(item->display->arenaitem, sp_item_display_key_new(3));
849 }
850 int clip_key = NR_ARENA_ITEM_GET_KEY(item->display->arenaitem);
852 // Show and set clip
853 NRArenaItem *ac = sp_clippath_show(cp, arena, clip_key);
854 nr_arena_item_set_clip(ai, ac);
855 nr_arena_item_unref(ac);
857 // Update bbox, in case the clip uses bbox units
858 NRRect bbox;
859 sp_item_invoke_bbox(item, &bbox, NR::identity(), TRUE);
860 sp_clippath_set_bbox(SP_CLIPPATH(cp), clip_key, &bbox);
861 SP_OBJECT(cp)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
862 }
863 if (item->mask_ref->getObject()) {
864 SPMask *mask = item->mask_ref->getObject();
866 if (!item->display->arenaitem->key) {
867 NR_ARENA_ITEM_SET_KEY(item->display->arenaitem, sp_item_display_key_new(3));
868 }
869 int mask_key = NR_ARENA_ITEM_GET_KEY(item->display->arenaitem);
871 // Show and set mask
872 NRArenaItem *ac = sp_mask_show(mask, arena, mask_key);
873 nr_arena_item_set_mask(ai, ac);
874 nr_arena_item_unref(ac);
876 // Update bbox, in case the mask uses bbox units
877 NRRect bbox;
878 sp_item_invoke_bbox(item, &bbox, NR::identity(), TRUE);
879 sp_mask_set_bbox(SP_MASK(mask), mask_key, &bbox);
880 SP_OBJECT(mask)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
881 }
882 NR_ARENA_ITEM_SET_DATA(ai, item);
883 }
885 return ai;
886 }
888 void
889 sp_item_invoke_hide(SPItem *item, unsigned key)
890 {
891 g_assert(item != NULL);
892 g_assert(SP_IS_ITEM(item));
894 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->hide) {
895 ((SPItemClass *) G_OBJECT_GET_CLASS(item))->hide(item, key);
896 }
898 SPItemView *ref = NULL;
899 SPItemView *v = item->display;
900 while (v != NULL) {
901 SPItemView *next = v->next;
902 if (v->key == key) {
903 if (item->clip_ref->getObject()) {
904 sp_clippath_hide(item->clip_ref->getObject(), NR_ARENA_ITEM_GET_KEY(v->arenaitem));
905 nr_arena_item_set_clip(v->arenaitem, NULL);
906 }
907 if (item->mask_ref->getObject()) {
908 sp_mask_hide(item->mask_ref->getObject(), NR_ARENA_ITEM_GET_KEY(v->arenaitem));
909 nr_arena_item_set_mask(v->arenaitem, NULL);
910 }
911 if (!ref) {
912 item->display = v->next;
913 } else {
914 ref->next = v->next;
915 }
916 nr_arena_item_unparent(v->arenaitem);
917 nr_arena_item_unref(v->arenaitem);
918 g_free(v);
919 } else {
920 ref = v;
921 }
922 v = next;
923 }
924 }
926 // Adjusters
928 void
929 sp_item_adjust_pattern (SPItem *item, NR::Matrix const &postmul, bool set)
930 {
931 SPStyle *style = SP_OBJECT_STYLE (item);
933 if (style && (style->fill.type == SP_PAINT_TYPE_PAINTSERVER)) {
934 SPObject *server = SP_OBJECT_STYLE_FILL_SERVER (item);
935 if (SP_IS_PATTERN (server)) {
936 SPPattern *pattern = sp_pattern_clone_if_necessary (item, SP_PATTERN (server), "fill");
937 sp_pattern_transform_multiply (pattern, postmul, set);
938 }
939 }
941 if (style && (style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)) {
942 SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER (item);
943 if (SP_IS_PATTERN (server)) {
944 SPPattern *pattern = sp_pattern_clone_if_necessary (item, SP_PATTERN (server), "stroke");
945 sp_pattern_transform_multiply (pattern, postmul, set);
946 }
947 }
949 }
951 void
952 sp_item_adjust_gradient (SPItem *item, NR::Matrix const &postmul, bool set)
953 {
954 SPStyle *style = SP_OBJECT_STYLE (item);
956 if (style && (style->fill.type == SP_PAINT_TYPE_PAINTSERVER)) {
957 SPObject *server = SP_OBJECT_STYLE_FILL_SERVER(item);
958 if (SP_IS_GRADIENT (server)) {
960 /**
961 * \note Bbox units for a gradient are generally a bad idea because
962 * with them, you cannot preserve the relative position of the
963 * object and its gradient after rotation or skew. So now we
964 * convert them to userspace units which are easy to keep in sync
965 * just by adding the object's transform to gradientTransform.
966 * \todo FIXME: convert back to bbox units after transforming with
967 * the item, so as to preserve the original units.
968 */
969 SPGradient *gradient = sp_gradient_convert_to_userspace (SP_GRADIENT (server), item, "fill");
971 sp_gradient_transform_multiply (gradient, postmul, set);
972 }
973 }
975 if (style && (style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)) {
976 SPObject *server = SP_OBJECT_STYLE_STROKE_SERVER(item);
977 if (SP_IS_GRADIENT (server)) {
978 SPGradient *gradient = sp_gradient_convert_to_userspace (SP_GRADIENT (server), item, "stroke");
979 sp_gradient_transform_multiply (gradient, postmul, set);
980 }
981 }
982 }
984 void
985 sp_item_adjust_stroke (SPItem *item, gdouble ex)
986 {
987 SPStyle *style = SP_OBJECT_STYLE (item);
989 if (style && style->stroke.type != SP_PAINT_TYPE_NONE && !NR_DF_TEST_CLOSE (ex, 1.0, NR_EPSILON)) {
991 style->stroke_width.computed *= ex;
992 style->stroke_width.set = TRUE;
994 if (style->stroke_dash.n_dash != 0) {
995 int i;
996 for (i = 0; i < style->stroke_dash.n_dash; i++) {
997 style->stroke_dash.dash[i] *= ex;
998 }
999 style->stroke_dash.offset *= ex;
1000 }
1002 SP_OBJECT(item)->updateRepr();
1003 }
1004 }
1006 /**
1007 * Find out the inverse of previous transform of an item (from its repr)
1008 */
1009 NR::Matrix
1010 sp_item_transform_repr (SPItem *item)
1011 {
1012 NR::Matrix t_old(NR::identity());
1013 gchar const *t_attr = SP_OBJECT_REPR(item)->attribute("transform");
1014 if (t_attr) {
1015 NR::Matrix t;
1016 if (sp_svg_transform_read(t_attr, &t)) {
1017 t_old = t;
1018 }
1019 }
1021 return t_old;
1022 }
1025 /**
1026 * Recursively scale stroke width in \a item and its children by \a expansion.
1027 */
1028 void
1029 sp_item_adjust_stroke_width_recursive(SPItem *item, double expansion)
1030 {
1031 sp_item_adjust_stroke (item, expansion);
1033 for (SPObject *o = SP_OBJECT(item)->children; o != NULL; o = o->next) {
1034 if (SP_IS_ITEM(o))
1035 sp_item_adjust_stroke_width_recursive(SP_ITEM(o), expansion);
1036 }
1037 }
1039 /**
1040 * Recursively adjust rx and ry of rects.
1041 */
1042 void
1043 sp_item_adjust_rects_recursive(SPItem *item, NR::Matrix advertized_transform)
1044 {
1045 if (SP_IS_RECT (item)) {
1046 sp_rect_compensate_rxry (SP_RECT(item), advertized_transform);
1047 }
1049 for (SPObject *o = SP_OBJECT(item)->children; o != NULL; o = o->next) {
1050 if (SP_IS_ITEM(o))
1051 sp_item_adjust_rects_recursive(SP_ITEM(o), advertized_transform);
1052 }
1053 }
1055 /**
1056 * Recursively compensate pattern or gradient transform.
1057 */
1058 void
1059 sp_item_adjust_paint_recursive (SPItem *item, NR::Matrix advertized_transform, NR::Matrix t_ancestors, bool is_pattern)
1060 {
1061 // A clone must not touch the style (it's that of its parent!) and has no children, so quit now
1062 if (item && SP_IS_USE(item))
1063 return;
1065 // _Before_ full pattern/gradient transform: t_paint * t_item * t_ancestors
1066 // _After_ full pattern/gradient transform: t_paint_new * t_item * t_ancestors * advertised_transform
1067 // By equating these two expressions we get t_paint_new = t_paint * paint_delta, where:
1068 NR::Matrix t_item = sp_item_transform_repr (item);
1069 NR::Matrix paint_delta = t_item * t_ancestors * advertized_transform * t_ancestors.inverse() * t_item.inverse();
1071 if (is_pattern)
1072 sp_item_adjust_pattern (item, paint_delta);
1073 else
1074 sp_item_adjust_gradient (item, paint_delta);
1076 // Within text, we do not fork gradients, and so must not recurse to avoid double compensation
1077 if (item && SP_IS_TEXT(item))
1078 return;
1080 for (SPObject *o = SP_OBJECT(item)->children; o != NULL; o = o->next) {
1081 if (SP_IS_ITEM(o)) {
1082 // At the level of the transformed item, t_ancestors is identity;
1083 // below it, it is the accmmulated chain of transforms from this level to the top level
1084 sp_item_adjust_paint_recursive (SP_ITEM(o), advertized_transform, t_item * t_ancestors, is_pattern);
1085 }
1086 }
1087 }
1089 /**
1090 * A temporary wrapper for the next function accepting the NRMatrix
1091 * instead of NR::Matrix
1092 */
1093 void
1094 sp_item_write_transform(SPItem *item, Inkscape::XML::Node *repr, NRMatrix const *transform, NR::Matrix const *adv)
1095 {
1096 if (transform == NULL)
1097 sp_item_write_transform(item, repr, NR::identity(), adv);
1098 else
1099 sp_item_write_transform(item, repr, NR::Matrix (transform), adv);
1100 }
1102 /**
1103 * Set a new transform on an object.
1104 *
1105 * Compensate for stroke scaling and gradient/pattern fill transform, if
1106 * necessary. Call the object's set_transform method if transforms are
1107 * stored optimized. Send _transformed_signal. Invoke _write method so that
1108 * the repr is updated with the new transform.
1109 */
1110 void
1111 sp_item_write_transform(SPItem *item, Inkscape::XML::Node *repr, NR::Matrix const &transform, NR::Matrix const *adv)
1112 {
1113 g_return_if_fail(item != NULL);
1114 g_return_if_fail(SP_IS_ITEM(item));
1115 g_return_if_fail(repr != NULL);
1117 // calculate the relative transform, if not given by the adv attribute
1118 NR::Matrix advertized_transform;
1119 if (adv != NULL) {
1120 advertized_transform = *adv;
1121 } else {
1122 advertized_transform = sp_item_transform_repr (item).inverse() * transform;
1123 }
1125 // recursively compensate for stroke scaling, depending on user preference
1126 if (prefs_get_int_attribute("options.transform", "stroke", 1) == 0) {
1127 double const expansion = 1. / NR::expansion(advertized_transform);
1128 sp_item_adjust_stroke_width_recursive(item, expansion);
1129 }
1131 // recursively compensate rx/ry of a rect if requested
1132 if (prefs_get_int_attribute("options.transform", "rectcorners", 1) == 0) {
1133 sp_item_adjust_rects_recursive(item, advertized_transform);
1134 }
1136 // recursively compensate pattern fill if it's not to be transformed
1137 if (prefs_get_int_attribute("options.transform", "pattern", 1) == 0) {
1138 sp_item_adjust_paint_recursive (item, advertized_transform.inverse(), NR::identity(), true);
1139 }
1140 /// \todo FIXME: add the same else branch as for gradients below, to convert patterns to userSpaceOnUse as well
1141 /// recursively compensate gradient fill if it's not to be transformed
1142 if (prefs_get_int_attribute("options.transform", "gradient", 1) == 0) {
1143 sp_item_adjust_paint_recursive (item, advertized_transform.inverse(), NR::identity(), false);
1144 } else {
1145 // this converts the gradient/pattern fill/stroke, if any, to userSpaceOnUse; we need to do
1146 // it here _before_ the new transform is set, so as to use the pre-transform bbox
1147 sp_item_adjust_paint_recursive (item, NR::identity(), NR::identity(), false);
1148 }
1150 // run the object's set_transform if transforms are stored optimized and there's no clippath or mask
1151 gint preserve = prefs_get_int_attribute("options.preservetransform", "value", 0);
1152 NR::Matrix transform_attr (transform);
1153 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->set_transform
1154 && !preserve && !item->clip_ref->getObject() && !item->mask_ref->getObject()) {
1155 transform_attr = ((SPItemClass *) G_OBJECT_GET_CLASS(item))->set_transform(item, transform);
1156 }
1157 sp_item_set_item_transform(item, transform_attr);
1159 // Note: updateRepr comes before emitting the transformed signal since
1160 // it causes clone SPUse's copy of the original object to brought up to
1161 // date with the original. Otherwise, sp_use_bbox returns incorrect
1162 // values if called in code handling the transformed signal.
1163 SP_OBJECT(item)->updateRepr();
1165 // send the relative transform with a _transformed_signal
1166 item->_transformed_signal.emit(&advertized_transform, item);
1167 }
1169 gint
1170 sp_item_event(SPItem *item, SPEvent *event)
1171 {
1172 g_return_val_if_fail(item != NULL, FALSE);
1173 g_return_val_if_fail(SP_IS_ITEM(item), FALSE);
1174 g_return_val_if_fail(event != NULL, FALSE);
1176 if (((SPItemClass *) G_OBJECT_GET_CLASS(item))->event)
1177 return ((SPItemClass *) G_OBJECT_GET_CLASS(item))->event(item, event);
1179 return FALSE;
1180 }
1182 /**
1183 * Sets item private transform (not propagated to repr), without compensating stroke widths,
1184 * gradients, patterns as sp_item_write_transform does.
1185 */
1186 void
1187 sp_item_set_item_transform(SPItem *item, NR::Matrix const &transform)
1188 {
1189 g_return_if_fail(item != NULL);
1190 g_return_if_fail(SP_IS_ITEM(item));
1192 if (!matrix_equalp(transform, item->transform, NR_EPSILON)) {
1193 item->transform = transform;
1194 /* The SP_OBJECT_USER_MODIFIED_FLAG_B is used to mark the fact that it's only a
1195 transformation. It's apparently not used anywhere else. */
1196 item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_USER_MODIFIED_FLAG_B);
1197 sp_item_rm_unsatisfied_cns(*item);
1198 }
1199 }
1202 /**
1203 * \pre \a ancestor really is an ancestor (\>=) of \a object, or NULL.
1204 * ("Ancestor (\>=)" here includes as far as \a object itself.)
1205 */
1206 NR::Matrix
1207 i2anc_affine(SPObject const *object, SPObject const *const ancestor) {
1208 NR::Matrix ret(NR::identity());
1209 g_return_val_if_fail(object != NULL, ret);
1211 /* stop at first non-renderable ancestor */
1212 while ( object != ancestor && SP_IS_ITEM(object) ) {
1213 if (SP_IS_ROOT(object)) {
1214 ret *= SP_ROOT(object)->c2p;
1215 }
1216 ret *= SP_ITEM(object)->transform;
1217 object = SP_OBJECT_PARENT(object);
1218 }
1219 return ret;
1220 }
1222 NR::Matrix
1223 i2i_affine(SPObject const *src, SPObject const *dest) {
1224 g_return_val_if_fail(src != NULL && dest != NULL, NR::identity());
1225 SPObject const *ancestor = src->nearestCommonAncestor(dest);
1226 return i2anc_affine(src, ancestor) / i2anc_affine(dest, ancestor);
1227 }
1229 NR::Matrix SPItem::getRelativeTransform(SPObject const *dest) const {
1230 return i2i_affine(this, dest);
1231 }
1233 /**
1234 * Returns the accumulated transformation of the item and all its ancestors, including root's viewport.
1235 * \pre (item != NULL) and SP_IS_ITEM(item).
1236 */
1237 NR::Matrix sp_item_i2doc_affine(SPItem const *item)
1238 {
1239 return i2anc_affine(item, NULL);
1240 }
1242 /**
1243 * Returns the accumulated transformation of the item and all its ancestors, but excluding root's viewport.
1244 * Used in path operations mostly.
1245 * \pre (item != NULL) and SP_IS_ITEM(item).
1246 */
1247 NR::Matrix sp_item_i2root_affine(SPItem const *item)
1248 {
1249 g_assert(item != NULL);
1250 g_assert(SP_IS_ITEM(item));
1252 NR::Matrix ret(NR::identity());
1253 g_assert(ret.test_identity());
1254 while ( NULL != SP_OBJECT_PARENT(item) ) {
1255 ret *= item->transform;
1256 item = SP_ITEM(SP_OBJECT_PARENT(item));
1257 }
1258 g_assert(SP_IS_ROOT(item));
1260 ret *= item->transform;
1262 return ret;
1263 }
1265 /* fixme: This is EVIL!!! */
1267 NR::Matrix sp_item_i2d_affine(SPItem const *item)
1268 {
1269 g_assert(item != NULL);
1270 g_assert(SP_IS_ITEM(item));
1272 NR::Matrix const ret( sp_item_i2doc_affine(item)
1273 * NR::scale(1, -1)
1274 * NR::translate(0, sp_document_height(SP_OBJECT_DOCUMENT(item))) );
1275 return ret;
1276 }
1278 // same as i2d but with i2root instead of i2doc
1279 NR::Matrix sp_item_i2r_affine(SPItem const *item)
1280 {
1281 g_assert(item != NULL);
1282 g_assert(SP_IS_ITEM(item));
1284 NR::Matrix const ret( sp_item_i2root_affine(item)
1285 * NR::scale(1, -1)
1286 * NR::translate(0, sp_document_height(SP_OBJECT_DOCUMENT(item))) );
1287 return ret;
1288 }
1290 /**
1291 * Converts a matrix \a m into the desktop coords of the \a item.
1292 * Will become a noop when we eliminate the coordinate flipping.
1293 */
1294 NR::Matrix matrix_to_desktop(NR::Matrix const m, SPItem const *item)
1295 {
1296 NR::Matrix const ret(m
1297 * NR::translate(0, -sp_document_height(SP_OBJECT_DOCUMENT(item)))
1298 * NR::scale(1, -1));
1299 return ret;
1300 }
1302 /**
1303 * Converts a matrix \a m from the desktop coords of the \a item.
1304 * Will become a noop when we eliminate the coordinate flipping.
1305 */
1306 NR::Matrix matrix_from_desktop(NR::Matrix const m, SPItem const *item)
1307 {
1308 NR::Matrix const ret(NR::scale(1, -1)
1309 * NR::translate(0, sp_document_height(SP_OBJECT_DOCUMENT(item)))
1310 * m);
1311 return ret;
1312 }
1314 void sp_item_set_i2d_affine(SPItem *item, NR::Matrix const &i2dt)
1315 {
1316 g_return_if_fail( item != NULL );
1317 g_return_if_fail( SP_IS_ITEM(item) );
1319 NR::Matrix dt2p; /* desktop to item parent transform */
1320 if (SP_OBJECT_PARENT(item)) {
1321 dt2p = sp_item_i2d_affine((SPItem *) SP_OBJECT_PARENT(item)).inverse();
1322 } else {
1323 dt2p = ( NR::translate(0, -sp_document_height(SP_OBJECT_DOCUMENT(item)))
1324 * NR::scale(1, -1) );
1325 }
1327 NR::Matrix const i2p( i2dt * dt2p );
1328 sp_item_set_item_transform(item, i2p);
1329 }
1332 NR::Matrix
1333 sp_item_dt2i_affine(SPItem const *item)
1334 {
1335 /* fixme: Implement the right way (Lauris) */
1336 return sp_item_i2d_affine(item).inverse();
1337 }
1339 /* Item views */
1341 static SPItemView *
1342 sp_item_view_new_prepend(SPItemView *list, SPItem *item, unsigned flags, unsigned key, NRArenaItem *arenaitem)
1343 {
1344 SPItemView *new_view;
1346 g_assert(item != NULL);
1347 g_assert(SP_IS_ITEM(item));
1348 g_assert(arenaitem != NULL);
1349 g_assert(NR_IS_ARENA_ITEM(arenaitem));
1351 new_view = g_new(SPItemView, 1);
1353 new_view->next = list;
1354 new_view->flags = flags;
1355 new_view->key = key;
1356 new_view->arenaitem = nr_arena_item_ref(arenaitem);
1358 return new_view;
1359 }
1361 static SPItemView *
1362 sp_item_view_list_remove(SPItemView *list, SPItemView *view)
1363 {
1364 if (view == list) {
1365 list = list->next;
1366 } else {
1367 SPItemView *prev;
1368 prev = list;
1369 while (prev->next != view) prev = prev->next;
1370 prev->next = view->next;
1371 }
1373 nr_arena_item_unref(view->arenaitem);
1374 g_free(view);
1376 return list;
1377 }
1379 /**
1380 * Return the arenaitem corresponding to the given item in the display
1381 * with the given key
1382 */
1383 NRArenaItem *
1384 sp_item_get_arenaitem(SPItem *item, unsigned key)
1385 {
1386 for ( SPItemView *iv = item->display ; iv ; iv = iv->next ) {
1387 if ( iv->key == key ) {
1388 return iv->arenaitem;
1389 }
1390 }
1392 return NULL;
1393 }
1395 int
1396 sp_item_repr_compare_position(SPItem *first, SPItem *second)
1397 {
1398 return sp_repr_compare_position(SP_OBJECT_REPR(first),
1399 SP_OBJECT_REPR(second));
1400 }
1402 SPItem *
1403 sp_item_first_item_child (SPObject *obj)
1404 {
1405 for ( SPObject *iter = sp_object_first_child(obj) ; iter ; iter = SP_OBJECT_NEXT(iter)) {
1406 if (SP_IS_ITEM (iter))
1407 return SP_ITEM (iter);
1408 }
1409 return NULL;
1410 }
1413 /*
1414 Local Variables:
1415 mode:c++
1416 c-file-style:"stroustrup"
1417 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1418 indent-tabs-mode:nil
1419 fill-column:99
1420 End:
1421 */
1422 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :