1 #define __MARKER_C__
3 /*
4 * SVG <marker> implementation
5 *
6 * Authors:
7 * Lauris Kaplinski <lauris@kaplinski.com>
8 * Bryce Harrington <bryce@bryceharrington.org>
9 *
10 * Copyright (C) 1999-2003 Lauris Kaplinski
11 * 2004-2006 Bryce Harrington
12 *
13 * Released under GNU GPL, read the file 'COPYING' for more information
14 */
16 #include "config.h"
19 #include "libnr/nr-matrix-fns.h"
20 #include "libnr/nr-matrix-ops.h"
21 #include "libnr/nr-scale-matrix-ops.h"
22 #include "libnr/nr-rotate-fns.h"
23 #include "svg/svg.h"
24 #include "display/nr-arena-group.h"
25 #include "xml/repr.h"
26 #include "attributes.h"
27 #include "marker.h"
28 #include "document.h"
30 struct SPMarkerView {
31 SPMarkerView *next;
32 unsigned int key;
33 unsigned int size;
34 NRArenaItem *items[1];
35 };
37 static void sp_marker_class_init (SPMarkerClass *klass);
38 static void sp_marker_init (SPMarker *marker);
40 static void sp_marker_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
41 static void sp_marker_release (SPObject *object);
42 static void sp_marker_set (SPObject *object, unsigned int key, const gchar *value);
43 static void sp_marker_update (SPObject *object, SPCtx *ctx, guint flags);
44 static Inkscape::XML::Node *sp_marker_write (SPObject *object, Inkscape::XML::Node *repr, guint flags);
46 static NRArenaItem *sp_marker_private_show (SPItem *item, NRArena *arena, unsigned int key, unsigned int flags);
47 static void sp_marker_private_hide (SPItem *item, unsigned int key);
48 static void sp_marker_bbox(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags);
49 static void sp_marker_print (SPItem *item, SPPrintContext *ctx);
51 static void sp_marker_view_remove (SPMarker *marker, SPMarkerView *view, unsigned int destroyitems);
53 static SPGroupClass *parent_class;
55 /**
56 * Registers the SPMarker class with Gdk and returns its type number.
57 */
58 GType
59 sp_marker_get_type (void)
60 {
61 static GType type = 0;
62 if (!type) {
63 GTypeInfo info = {
64 sizeof (SPMarkerClass),
65 NULL, NULL,
66 (GClassInitFunc) sp_marker_class_init,
67 NULL, NULL,
68 sizeof (SPMarker),
69 16,
70 (GInstanceInitFunc) sp_marker_init,
71 NULL, /* value_table */
72 };
73 type = g_type_register_static (SP_TYPE_GROUP, "SPMarker", &info, (GTypeFlags)0);
74 }
75 return type;
76 }
78 /**
79 * Initializes a SPMarkerClass object. Establishes the function pointers to the class'
80 * member routines in the class vtable, and sets pointers to parent classes.
81 */
82 static void
83 sp_marker_class_init (SPMarkerClass *klass)
84 {
85 GObjectClass *object_class;
86 SPObjectClass *sp_object_class;
87 SPItemClass *sp_item_class;
89 object_class = G_OBJECT_CLASS (klass);
90 sp_object_class = (SPObjectClass *) klass;
91 sp_item_class = (SPItemClass *) klass;
93 parent_class = (SPGroupClass *)g_type_class_ref (SP_TYPE_GROUP);
95 sp_object_class->build = sp_marker_build;
96 sp_object_class->release = sp_marker_release;
97 sp_object_class->set = sp_marker_set;
98 sp_object_class->update = sp_marker_update;
99 sp_object_class->write = sp_marker_write;
101 sp_item_class->show = sp_marker_private_show;
102 sp_item_class->hide = sp_marker_private_hide;
103 sp_item_class->bbox = sp_marker_bbox;
104 sp_item_class->print = sp_marker_print;
105 }
107 /**
108 * Initializes an SPMarker object. This notes the marker's viewBox is
109 * not set and initializes the marker's c2p identity matrix.
110 */
111 static void
112 sp_marker_init (SPMarker *marker)
113 {
114 marker->viewBox_set = FALSE;
116 nr_matrix_set_identity (&marker->c2p);
117 }
119 /**
120 * Virtual build callback for SPMarker.
121 *
122 * This is to be invoked immediately after creation of an SPMarker. This
123 * method fills an SPMarker object with its SVG attributes, and calls the
124 * parent class' build routine to attach the object to its document and
125 * repr. The result will be creation of the whole document tree.
126 *
127 * \see sp_object_build()
128 */
129 static void
130 sp_marker_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
131 {
132 SPGroup *group;
133 SPMarker *marker;
135 group = (SPGroup *) object;
136 marker = (SPMarker *) object;
138 sp_object_read_attr (object, "markerUnits");
139 sp_object_read_attr (object, "refX");
140 sp_object_read_attr (object, "refY");
141 sp_object_read_attr (object, "markerWidth");
142 sp_object_read_attr (object, "markerHeight");
143 sp_object_read_attr (object, "orient");
144 sp_object_read_attr (object, "viewBox");
145 sp_object_read_attr (object, "preserveAspectRatio");
147 if (((SPObjectClass *) parent_class)->build)
148 ((SPObjectClass *) parent_class)->build (object, document, repr);
149 }
151 /**
152 * Removes, releases and unrefs all children of object
153 *
154 * This is the inverse of sp_marker_build(). It must be invoked as soon
155 * as the marker is removed from the tree, even if it is still referenced
156 * by other objects. It hides and removes any views of the marker, then
157 * calls the parent classes' release function to deregister the object
158 * and release its SPRepr bindings. The result will be the destruction
159 * of the entire document tree.
160 *
161 * \see sp_object_release()
162 */
163 static void
164 sp_marker_release (SPObject *object)
165 {
166 SPMarker *marker;
168 marker = (SPMarker *) object;
170 while (marker->views) {
171 /* Destroy all NRArenaitems etc. */
172 /* Parent class ::hide method */
173 ((SPItemClass *) parent_class)->hide ((SPItem *) marker, marker->views->key);
174 sp_marker_view_remove (marker, marker->views, TRUE);
175 }
177 if (((SPObjectClass *) parent_class)->release)
178 ((SPObjectClass *) parent_class)->release (object);
179 }
181 /**
182 * Sets an attribute, 'key', of a marker object to 'value'. Supported
183 * attributes that can be set with this routine include:
184 *
185 * SP_ATTR_MARKERUNITS
186 * SP_ATTR_REFX
187 * SP_ATTR_REFY
188 * SP_ATTR_MARKERWIDTH
189 * SP_ATTR_MARKERHEIGHT
190 * SP_ATTR_ORIENT
191 * SP_ATTR_VIEWBOX
192 * SP_ATTR_PRESERVEASPECTRATIO
193 */
194 static void
195 sp_marker_set (SPObject *object, unsigned int key, const gchar *value)
196 {
197 SPItem *item;
198 SPMarker *marker;
200 item = SP_ITEM (object);
201 marker = SP_MARKER (object);
203 switch (key) {
204 case SP_ATTR_MARKERUNITS:
205 marker->markerUnits_set = FALSE;
206 marker->markerUnits = SP_MARKER_UNITS_STROKEWIDTH;
207 if (value) {
208 if (!strcmp (value, "strokeWidth")) {
209 marker->markerUnits_set = TRUE;
210 } else if (!strcmp (value, "userSpaceOnUse")) {
211 marker->markerUnits = SP_MARKER_UNITS_USERSPACEONUSE;
212 marker->markerUnits_set = TRUE;
213 }
214 }
215 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
216 break;
217 case SP_ATTR_REFX:
218 marker->refX.readOrUnset(value);
219 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
220 break;
221 case SP_ATTR_REFY:
222 marker->refY.readOrUnset(value);
223 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
224 break;
225 case SP_ATTR_MARKERWIDTH:
226 marker->markerWidth.readOrUnset(value, SVGLength::NONE, 3.0, 3.0);
227 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
228 break;
229 case SP_ATTR_MARKERHEIGHT:
230 marker->markerHeight.readOrUnset(value, SVGLength::NONE, 3.0, 3.0);
231 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
232 break;
233 case SP_ATTR_ORIENT:
234 marker->orient_set = FALSE;
235 marker->orient_auto = FALSE;
236 marker->orient = 0.0;
237 if (value) {
238 if (!strcmp (value, "auto")) {
239 marker->orient_auto = TRUE;
240 marker->orient_set = TRUE;
241 } else if (sp_svg_number_read_f (value, &marker->orient)) {
242 marker->orient_set = TRUE;
243 }
244 }
245 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
246 break;
247 case SP_ATTR_VIEWBOX:
248 marker->viewBox_set = FALSE;
249 if (value) {
250 double x, y, width, height;
251 char *eptr;
252 /* fixme: We have to take original item affine into account */
253 /* fixme: Think (Lauris) */
254 eptr = (gchar *) value;
255 x = g_ascii_strtod (eptr, &eptr);
256 while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
257 y = g_ascii_strtod (eptr, &eptr);
258 while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
259 width = g_ascii_strtod (eptr, &eptr);
260 while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
261 height = g_ascii_strtod (eptr, &eptr);
262 while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
263 if ((width > 0) && (height > 0)) {
264 /* Set viewbox */
265 marker->viewBox.x0 = x;
266 marker->viewBox.y0 = y;
267 marker->viewBox.x1 = x + width;
268 marker->viewBox.y1 = y + height;
269 marker->viewBox_set = TRUE;
270 }
271 }
272 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
273 break;
274 case SP_ATTR_PRESERVEASPECTRATIO:
275 /* Do setup before, so we can use break to escape */
276 marker->aspect_set = FALSE;
277 marker->aspect_align = SP_ASPECT_NONE;
278 marker->aspect_clip = SP_ASPECT_MEET;
279 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
280 if (value) {
281 int len;
282 gchar c[256];
283 const gchar *p, *e;
284 unsigned int align, clip;
285 p = value;
286 while (*p && *p == 32) p += 1;
287 if (!*p) break;
288 e = p;
289 while (*e && *e != 32) e += 1;
290 len = e - p;
291 if (len > 8) break;
292 memcpy (c, value, len);
293 c[len] = 0;
294 /* Now the actual part */
295 if (!strcmp (c, "none")) {
296 align = SP_ASPECT_NONE;
297 } else if (!strcmp (c, "xMinYMin")) {
298 align = SP_ASPECT_XMIN_YMIN;
299 } else if (!strcmp (c, "xMidYMin")) {
300 align = SP_ASPECT_XMID_YMIN;
301 } else if (!strcmp (c, "xMaxYMin")) {
302 align = SP_ASPECT_XMAX_YMIN;
303 } else if (!strcmp (c, "xMinYMid")) {
304 align = SP_ASPECT_XMIN_YMID;
305 } else if (!strcmp (c, "xMidYMid")) {
306 align = SP_ASPECT_XMID_YMID;
307 } else if (!strcmp (c, "xMaxYMin")) {
308 align = SP_ASPECT_XMAX_YMID;
309 } else if (!strcmp (c, "xMinYMax")) {
310 align = SP_ASPECT_XMIN_YMAX;
311 } else if (!strcmp (c, "xMidYMax")) {
312 align = SP_ASPECT_XMID_YMAX;
313 } else if (!strcmp (c, "xMaxYMax")) {
314 align = SP_ASPECT_XMAX_YMAX;
315 } else {
316 break;
317 }
318 clip = SP_ASPECT_MEET;
319 while (*e && *e == 32) e += 1;
320 if (e) {
321 if (!strcmp (e, "meet")) {
322 clip = SP_ASPECT_MEET;
323 } else if (!strcmp (e, "slice")) {
324 clip = SP_ASPECT_SLICE;
325 } else {
326 break;
327 }
328 }
329 marker->aspect_set = TRUE;
330 marker->aspect_align = align;
331 marker->aspect_clip = clip;
332 }
333 break;
334 default:
335 if (((SPObjectClass *) parent_class)->set)
336 ((SPObjectClass *) parent_class)->set (object, key, value);
337 break;
338 }
339 }
341 /**
342 * Updates <marker> when its attributes have changed. Takes care of setting up
343 * transformations and viewBoxes.
344 */
345 static void
346 sp_marker_update (SPObject *object, SPCtx *ctx, guint flags)
347 {
348 SPItem *item;
349 SPMarker *marker;
350 SPItemCtx rctx;
351 NRRect *vb;
352 double x, y, width, height;
353 NRMatrix q;
354 SPMarkerView *v;
356 item = SP_ITEM (object);
357 marker = SP_MARKER (object);
359 /* fixme: We have to set up clip here too */
361 /* Copy parent context */
362 rctx.ctx = *ctx;
363 /* Initialize tranformations */
364 rctx.i2doc = NR::identity();
365 rctx.i2vp = NR::identity();
366 /* Set up viewport */
367 rctx.vp.x0 = 0.0;
368 rctx.vp.y0 = 0.0;
369 rctx.vp.x1 = marker->markerWidth.computed;
370 rctx.vp.y1 = marker->markerHeight.computed;
372 /* Start with identity transform */
373 nr_matrix_set_identity (&marker->c2p);
375 /* Viewbox is always present, either implicitly or explicitly */
376 if (marker->viewBox_set) {
377 vb = &marker->viewBox;
378 } else {
379 vb = &rctx.vp;
380 }
381 /* Now set up viewbox transformation */
382 /* Determine actual viewbox in viewport coordinates */
383 if (marker->aspect_align == SP_ASPECT_NONE) {
384 x = 0.0;
385 y = 0.0;
386 width = rctx.vp.x1 - rctx.vp.x0;
387 height = rctx.vp.y1 - rctx.vp.y0;
388 } else {
389 double scalex, scaley, scale;
390 /* Things are getting interesting */
391 scalex = (rctx.vp.x1 - rctx.vp.x0) / (vb->x1 - vb->x0);
392 scaley = (rctx.vp.y1 - rctx.vp.y0) / (vb->y1 - vb->y0);
393 scale = (marker->aspect_clip == SP_ASPECT_MEET) ? MIN (scalex, scaley) : MAX (scalex, scaley);
394 width = (vb->x1 - vb->x0) * scale;
395 height = (vb->y1 - vb->y0) * scale;
396 /* Now place viewbox to requested position */
397 switch (marker->aspect_align) {
398 case SP_ASPECT_XMIN_YMIN:
399 x = 0.0;
400 y = 0.0;
401 break;
402 case SP_ASPECT_XMID_YMIN:
403 x = 0.5 * ((rctx.vp.x1 - rctx.vp.x0) - width);
404 y = 0.0;
405 break;
406 case SP_ASPECT_XMAX_YMIN:
407 x = 1.0 * ((rctx.vp.x1 - rctx.vp.x0) - width);
408 y = 0.0;
409 break;
410 case SP_ASPECT_XMIN_YMID:
411 x = 0.0;
412 y = 0.5 * ((rctx.vp.y1 - rctx.vp.y0) - height);
413 break;
414 case SP_ASPECT_XMID_YMID:
415 x = 0.5 * ((rctx.vp.x1 - rctx.vp.x0) - width);
416 y = 0.5 * ((rctx.vp.y1 - rctx.vp.y0) - height);
417 break;
418 case SP_ASPECT_XMAX_YMID:
419 x = 1.0 * ((rctx.vp.x1 - rctx.vp.x0) - width);
420 y = 0.5 * ((rctx.vp.y1 - rctx.vp.y0) - height);
421 break;
422 case SP_ASPECT_XMIN_YMAX:
423 x = 0.0;
424 y = 1.0 * ((rctx.vp.y1 - rctx.vp.y0) - height);
425 break;
426 case SP_ASPECT_XMID_YMAX:
427 x = 0.5 * ((rctx.vp.x1 - rctx.vp.x0) - width);
428 y = 1.0 * ((rctx.vp.y1 - rctx.vp.y0) - height);
429 break;
430 case SP_ASPECT_XMAX_YMAX:
431 x = 1.0 * ((rctx.vp.x1 - rctx.vp.x0) - width);
432 y = 1.0 * ((rctx.vp.y1 - rctx.vp.y0) - height);
433 break;
434 default:
435 x = 0.0;
436 y = 0.0;
437 break;
438 }
439 }
440 /* Compose additional transformation from scale and position */
441 q.c[0] = width / (vb->x1 - vb->x0);
442 q.c[1] = 0.0;
443 q.c[2] = 0.0;
444 q.c[3] = height / (vb->y1 - vb->y0);
445 q.c[4] = -vb->x0 * q.c[0] + x;
446 q.c[5] = -vb->y0 * q.c[3] + y;
447 /* Append viewbox transformation */
448 nr_matrix_multiply (&marker->c2p, &q, &marker->c2p);
451 /* Append reference translation */
452 /* fixme: lala (Lauris) */
453 nr_matrix_set_translate (&q, -marker->refX.computed, -marker->refY.computed);
454 nr_matrix_multiply (&marker->c2p, &q, &marker->c2p);
456 rctx.i2doc = marker->c2p * rctx.i2doc;
458 /* If viewBox is set reinitialize child viewport */
459 /* Otherwise it already correct */
460 if (marker->viewBox_set) {
461 rctx.vp.x0 = marker->viewBox.x0;
462 rctx.vp.y0 = marker->viewBox.y0;
463 rctx.vp.x1 = marker->viewBox.x1;
464 rctx.vp.y1 = marker->viewBox.y1;
465 rctx.i2vp = NR::identity();
466 }
468 /* And invoke parent method */
469 if (((SPObjectClass *) (parent_class))->update)
470 ((SPObjectClass *) (parent_class))->update (object, (SPCtx *) &rctx, flags);
472 /* As last step set additional transform of arena group */
473 for (v = marker->views; v != NULL; v = v->next) {
474 for (unsigned i = 0 ; i < v->size ; i++) {
475 if (v->items[i]) {
476 nr_arena_group_set_child_transform(NR_ARENA_GROUP(v->items[i]), &marker->c2p);
477 }
478 }
479 }
480 }
482 /**
483 * Writes the object's properties into its repr object.
484 */
485 static Inkscape::XML::Node *
486 sp_marker_write (SPObject *object, Inkscape::XML::Node *repr, guint flags)
487 {
488 SPMarker *marker;
490 marker = SP_MARKER (object);
492 if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
493 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_OBJECT_DOCUMENT(object));
494 repr = xml_doc->createElement("svg:marker");
495 }
497 if (marker->markerUnits_set) {
498 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
499 repr->setAttribute("markerUnits", "strokeWidth");
500 } else {
501 repr->setAttribute("markerUnits", "userSpaceOnUse");
502 }
503 } else {
504 repr->setAttribute("markerUnits", NULL);
505 }
506 if (marker->refX._set) {
507 sp_repr_set_svg_double(repr, "refX", marker->refX.computed);
508 } else {
509 repr->setAttribute("refX", NULL);
510 }
511 if (marker->refY._set) {
512 sp_repr_set_svg_double (repr, "refY", marker->refY.computed);
513 } else {
514 repr->setAttribute("refY", NULL);
515 }
516 if (marker->markerWidth._set) {
517 sp_repr_set_svg_double (repr, "markerWidth", marker->markerWidth.computed);
518 } else {
519 repr->setAttribute("markerWidth", NULL);
520 }
521 if (marker->markerHeight._set) {
522 sp_repr_set_svg_double (repr, "markerHeight", marker->markerHeight.computed);
523 } else {
524 repr->setAttribute("markerHeight", NULL);
525 }
526 if (marker->orient_set) {
527 if (marker->orient_auto) {
528 repr->setAttribute("orient", "auto");
529 } else {
530 sp_repr_set_css_double(repr, "orient", marker->orient);
531 }
532 } else {
533 repr->setAttribute("orient", NULL);
534 }
535 /* fixme: */
536 repr->setAttribute("viewBox", object->repr->attribute("viewBox"));
537 repr->setAttribute("preserveAspectRatio", object->repr->attribute("preserveAspectRatio"));
539 if (((SPObjectClass *) (parent_class))->write)
540 ((SPObjectClass *) (parent_class))->write (object, repr, flags);
542 return repr;
543 }
545 /**
546 * This routine is disabled to break propagation.
547 */
548 static NRArenaItem *
549 sp_marker_private_show (SPItem *item, NRArena *arena, unsigned int key, unsigned int flags)
550 {
551 /* Break propagation */
552 return NULL;
553 }
555 /**
556 * This routine is disabled to break propagation.
557 */
558 static void
559 sp_marker_private_hide (SPItem *item, unsigned int key)
560 {
561 /* Break propagation */
562 }
564 /**
565 * This routine is disabled to break propagation.
566 */
567 static void
568 sp_marker_bbox(SPItem const *, NRRect *, NR::Matrix const &, unsigned const)
569 {
570 /* Break propagation */
571 }
573 /**
574 * This routine is disabled to break propagation.
575 */
576 static void
577 sp_marker_print (SPItem *item, SPPrintContext *ctx)
578 {
579 /* Break propagation */
580 }
582 /* fixme: Remove link if zero-sized (Lauris) */
584 /**
585 * Removes any SPMarkerViews that a marker has with a specific key.
586 * Set up the NRArenaItem array's size in the specified SPMarker's SPMarkerView.
587 * This is called from sp_shape_update() for shapes that have markers. It
588 * removes the old view of the marker and establishes a new one, registering
589 * it with the marker's list of views for future updates.
590 *
591 * \param marker Marker to create views in.
592 * \param key Key to give each SPMarkerView.
593 * \param size Number of NRArenaItems to put in the SPMarkerView.
594 */
595 void
596 sp_marker_show_dimension (SPMarker *marker, unsigned int key, unsigned int size)
597 {
598 SPMarkerView *view;
599 unsigned int i;
601 for (view = marker->views; view != NULL; view = view->next) {
602 if (view->key == key) break;
603 }
604 if (view && (view->size != size)) {
605 /* Free old view and allocate new */
606 /* Parent class ::hide method */
607 ((SPItemClass *) parent_class)->hide ((SPItem *) marker, key);
608 sp_marker_view_remove (marker, view, TRUE);
609 view = NULL;
610 }
611 if (!view) {
612 view = (SPMarkerView *)g_malloc (sizeof (SPMarkerView) + (size) * sizeof (NRArenaItem *));
613 for (i = 0; i < size; i++) view->items[i] = NULL;
614 view->next = marker->views;
615 marker->views = view;
616 view->key = key;
617 view->size = size;
618 }
619 }
621 /**
622 * Shows an instance of a marker. This is called during sp_shape_update_marker_view()
623 * show and transform a child item in the arena for all views with the given key.
624 */
625 NRArenaItem *
626 sp_marker_show_instance (SPMarker *marker, NRArenaItem *parent,
627 unsigned int key, unsigned int pos,
628 NR::Matrix const &base, float linewidth)
629 {
630 for (SPMarkerView *v = marker->views; v != NULL; v = v->next) {
631 if (v->key == key) {
632 if (pos >= v->size) {
633 return NULL;
634 }
635 if (!v->items[pos]) {
636 /* Parent class ::show method */
637 v->items[pos] = ((SPItemClass *) parent_class)->show ((SPItem *) marker,
638 parent->arena, key,
639 SP_ITEM_REFERENCE_FLAGS);
640 if (v->items[pos]) {
641 /* fixme: Position (Lauris) */
642 nr_arena_item_add_child (parent, v->items[pos], NULL);
643 /* nr_arena_item_unref (v->items[pos]); */
644 nr_arena_group_set_child_transform((NRArenaGroup *) v->items[pos], &marker->c2p);
645 }
646 }
647 if (v->items[pos]) {
648 NR::Matrix m;
649 if (marker->orient_auto) {
650 m = base;
651 } else {
652 /* fixme: Orient units (Lauris) */
653 m = NR::Matrix(rotate_degrees(marker->orient));
654 m *= get_translation(base);
655 }
656 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
657 m = NR::scale(linewidth) * m;
658 }
660 nr_arena_item_set_transform(v->items[pos], m);
661 }
662 return v->items[pos];
663 }
664 }
666 return NULL;
667 }
669 /**
670 * Hides/removes all views of the given marker that have key 'key'.
671 * This replaces SPItem implementation because we have our own views
672 * \param key SPMarkerView key to hide.
673 */
674 void
675 sp_marker_hide (SPMarker *marker, unsigned int key)
676 {
677 SPMarkerView *v;
679 v = marker->views;
680 while (v != NULL) {
681 SPMarkerView *next;
682 next = v->next;
683 if (v->key == key) {
684 /* Parent class ::hide method */
685 ((SPItemClass *) parent_class)->hide ((SPItem *) marker, key);
686 sp_marker_view_remove (marker, v, TRUE);
687 return;
688 }
689 v = next;
690 }
691 }
693 /**
694 * Removes a given view. Also will destroy sub-items in the view if destroyitems
695 * is set to a non-zero value.
696 */
697 static void
698 sp_marker_view_remove (SPMarker *marker, SPMarkerView *view, unsigned int destroyitems)
699 {
700 unsigned int i;
701 if (view == marker->views) {
702 marker->views = view->next;
703 } else {
704 SPMarkerView *v;
705 for (v = marker->views; v->next != view; v = v->next) if (!v->next) return;
706 v->next = view->next;
707 }
708 if (destroyitems) {
709 for (i = 0; i < view->size; i++) {
710 /* We have to walk through the whole array because there may be hidden items */
711 if (view->items[i]) nr_arena_item_unref (view->items[i]);
712 }
713 }
714 g_free (view);
715 }