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 <cstring>
17 #include <string>
18 #include "config.h"
21 #include "libnr/nr-matrix-fns.h"
22 #include "libnr/nr-matrix-ops.h"
23 #include "libnr/nr-scale-matrix-ops.h"
24 #include "libnr/nr-rotate-fns.h"
25 #include "svg/svg.h"
26 #include "display/nr-arena-group.h"
27 #include "xml/repr.h"
28 #include "attributes.h"
29 #include "marker.h"
30 #include "document.h"
31 #include "document-private.h"
33 struct SPMarkerView {
34 SPMarkerView *next;
35 unsigned int key;
36 unsigned int size;
37 NRArenaItem *items[1];
38 };
40 static void sp_marker_class_init (SPMarkerClass *klass);
41 static void sp_marker_init (SPMarker *marker);
43 static void sp_marker_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
44 static void sp_marker_release (SPObject *object);
45 static void sp_marker_set (SPObject *object, unsigned int key, const gchar *value);
46 static void sp_marker_update (SPObject *object, SPCtx *ctx, guint flags);
47 static Inkscape::XML::Node *sp_marker_write (SPObject *object, Inkscape::XML::Node *repr, guint flags);
49 static NRArenaItem *sp_marker_private_show (SPItem *item, NRArena *arena, unsigned int key, unsigned int flags);
50 static void sp_marker_private_hide (SPItem *item, unsigned int key);
51 static void sp_marker_bbox(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags);
52 static void sp_marker_print (SPItem *item, SPPrintContext *ctx);
54 static void sp_marker_view_remove (SPMarker *marker, SPMarkerView *view, unsigned int destroyitems);
56 static SPGroupClass *parent_class;
58 /**
59 * Registers the SPMarker class with Gdk and returns its type number.
60 */
61 GType
62 sp_marker_get_type (void)
63 {
64 static GType type = 0;
65 if (!type) {
66 GTypeInfo info = {
67 sizeof (SPMarkerClass),
68 NULL, NULL,
69 (GClassInitFunc) sp_marker_class_init,
70 NULL, NULL,
71 sizeof (SPMarker),
72 16,
73 (GInstanceInitFunc) sp_marker_init,
74 NULL, /* value_table */
75 };
76 type = g_type_register_static (SP_TYPE_GROUP, "SPMarker", &info, (GTypeFlags)0);
77 }
78 return type;
79 }
81 /**
82 * Initializes a SPMarkerClass object. Establishes the function pointers to the class'
83 * member routines in the class vtable, and sets pointers to parent classes.
84 */
85 static void
86 sp_marker_class_init (SPMarkerClass *klass)
87 {
88 GObjectClass *object_class;
89 SPObjectClass *sp_object_class;
90 SPItemClass *sp_item_class;
92 object_class = G_OBJECT_CLASS (klass);
93 sp_object_class = (SPObjectClass *) klass;
94 sp_item_class = (SPItemClass *) klass;
96 parent_class = (SPGroupClass *)g_type_class_ref (SP_TYPE_GROUP);
98 sp_object_class->build = sp_marker_build;
99 sp_object_class->release = sp_marker_release;
100 sp_object_class->set = sp_marker_set;
101 sp_object_class->update = sp_marker_update;
102 sp_object_class->write = sp_marker_write;
104 sp_item_class->show = sp_marker_private_show;
105 sp_item_class->hide = sp_marker_private_hide;
106 sp_item_class->bbox = sp_marker_bbox;
107 sp_item_class->print = sp_marker_print;
108 }
110 /**
111 * Initializes an SPMarker object. This notes the marker's viewBox is
112 * not set and initializes the marker's c2p identity matrix.
113 */
114 static void
115 sp_marker_init (SPMarker *marker)
116 {
117 marker->viewBox_set = FALSE;
119 nr_matrix_set_identity (&marker->c2p);
120 }
122 /**
123 * Virtual build callback for SPMarker.
124 *
125 * This is to be invoked immediately after creation of an SPMarker. This
126 * method fills an SPMarker object with its SVG attributes, and calls the
127 * parent class' build routine to attach the object to its document and
128 * repr. The result will be creation of the whole document tree.
129 *
130 * \see sp_object_build()
131 */
132 static void
133 sp_marker_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
134 {
135 SPGroup *group;
136 SPMarker *marker;
138 group = (SPGroup *) object;
139 marker = (SPMarker *) object;
141 sp_object_read_attr (object, "markerUnits");
142 sp_object_read_attr (object, "refX");
143 sp_object_read_attr (object, "refY");
144 sp_object_read_attr (object, "markerWidth");
145 sp_object_read_attr (object, "markerHeight");
146 sp_object_read_attr (object, "orient");
147 sp_object_read_attr (object, "viewBox");
148 sp_object_read_attr (object, "preserveAspectRatio");
150 if (((SPObjectClass *) parent_class)->build)
151 ((SPObjectClass *) parent_class)->build (object, document, repr);
152 }
154 /**
155 * Removes, releases and unrefs all children of object
156 *
157 * This is the inverse of sp_marker_build(). It must be invoked as soon
158 * as the marker is removed from the tree, even if it is still referenced
159 * by other objects. It hides and removes any views of the marker, then
160 * calls the parent classes' release function to deregister the object
161 * and release its SPRepr bindings. The result will be the destruction
162 * of the entire document tree.
163 *
164 * \see sp_object_release()
165 */
166 static void
167 sp_marker_release (SPObject *object)
168 {
169 SPMarker *marker;
171 marker = (SPMarker *) object;
173 while (marker->views) {
174 /* Destroy all NRArenaitems etc. */
175 /* Parent class ::hide method */
176 ((SPItemClass *) parent_class)->hide ((SPItem *) marker, marker->views->key);
177 sp_marker_view_remove (marker, marker->views, TRUE);
178 }
180 if (((SPObjectClass *) parent_class)->release)
181 ((SPObjectClass *) parent_class)->release (object);
182 }
184 /**
185 * Sets an attribute, 'key', of a marker object to 'value'. Supported
186 * attributes that can be set with this routine include:
187 *
188 * SP_ATTR_MARKERUNITS
189 * SP_ATTR_REFX
190 * SP_ATTR_REFY
191 * SP_ATTR_MARKERWIDTH
192 * SP_ATTR_MARKERHEIGHT
193 * SP_ATTR_ORIENT
194 * SP_ATTR_VIEWBOX
195 * SP_ATTR_PRESERVEASPECTRATIO
196 */
197 static void
198 sp_marker_set (SPObject *object, unsigned int key, const gchar *value)
199 {
200 SPItem *item;
201 SPMarker *marker;
203 item = SP_ITEM (object);
204 marker = SP_MARKER (object);
206 switch (key) {
207 case SP_ATTR_MARKERUNITS:
208 marker->markerUnits_set = FALSE;
209 marker->markerUnits = SP_MARKER_UNITS_STROKEWIDTH;
210 if (value) {
211 if (!strcmp (value, "strokeWidth")) {
212 marker->markerUnits_set = TRUE;
213 } else if (!strcmp (value, "userSpaceOnUse")) {
214 marker->markerUnits = SP_MARKER_UNITS_USERSPACEONUSE;
215 marker->markerUnits_set = TRUE;
216 }
217 }
218 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
219 break;
220 case SP_ATTR_REFX:
221 marker->refX.readOrUnset(value);
222 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
223 break;
224 case SP_ATTR_REFY:
225 marker->refY.readOrUnset(value);
226 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
227 break;
228 case SP_ATTR_MARKERWIDTH:
229 marker->markerWidth.readOrUnset(value, SVGLength::NONE, 3.0, 3.0);
230 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
231 break;
232 case SP_ATTR_MARKERHEIGHT:
233 marker->markerHeight.readOrUnset(value, SVGLength::NONE, 3.0, 3.0);
234 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
235 break;
236 case SP_ATTR_ORIENT:
237 marker->orient_set = FALSE;
238 marker->orient_auto = FALSE;
239 marker->orient = 0.0;
240 if (value) {
241 if (!strcmp (value, "auto")) {
242 marker->orient_auto = TRUE;
243 marker->orient_set = TRUE;
244 } else if (sp_svg_number_read_f (value, &marker->orient)) {
245 marker->orient_set = TRUE;
246 }
247 }
248 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
249 break;
250 case SP_ATTR_VIEWBOX:
251 marker->viewBox_set = FALSE;
252 if (value) {
253 double x, y, width, height;
254 char *eptr;
255 /* fixme: We have to take original item affine into account */
256 /* fixme: Think (Lauris) */
257 eptr = (gchar *) value;
258 x = g_ascii_strtod (eptr, &eptr);
259 while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
260 y = g_ascii_strtod (eptr, &eptr);
261 while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
262 width = g_ascii_strtod (eptr, &eptr);
263 while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
264 height = g_ascii_strtod (eptr, &eptr);
265 while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
266 if ((width > 0) && (height > 0)) {
267 /* Set viewbox */
268 marker->viewBox.x0 = x;
269 marker->viewBox.y0 = y;
270 marker->viewBox.x1 = x + width;
271 marker->viewBox.y1 = y + height;
272 marker->viewBox_set = TRUE;
273 }
274 }
275 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
276 break;
277 case SP_ATTR_PRESERVEASPECTRATIO:
278 /* Do setup before, so we can use break to escape */
279 marker->aspect_set = FALSE;
280 marker->aspect_align = SP_ASPECT_NONE;
281 marker->aspect_clip = SP_ASPECT_MEET;
282 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
283 if (value) {
284 int len;
285 gchar c[256];
286 const gchar *p, *e;
287 unsigned int align, clip;
288 p = value;
289 while (*p && *p == 32) p += 1;
290 if (!*p) break;
291 e = p;
292 while (*e && *e != 32) e += 1;
293 len = e - p;
294 if (len > 8) break;
295 memcpy (c, value, len);
296 c[len] = 0;
297 /* Now the actual part */
298 if (!strcmp (c, "none")) {
299 align = SP_ASPECT_NONE;
300 } else if (!strcmp (c, "xMinYMin")) {
301 align = SP_ASPECT_XMIN_YMIN;
302 } else if (!strcmp (c, "xMidYMin")) {
303 align = SP_ASPECT_XMID_YMIN;
304 } else if (!strcmp (c, "xMaxYMin")) {
305 align = SP_ASPECT_XMAX_YMIN;
306 } else if (!strcmp (c, "xMinYMid")) {
307 align = SP_ASPECT_XMIN_YMID;
308 } else if (!strcmp (c, "xMidYMid")) {
309 align = SP_ASPECT_XMID_YMID;
310 } else if (!strcmp (c, "xMaxYMin")) {
311 align = SP_ASPECT_XMAX_YMID;
312 } else if (!strcmp (c, "xMinYMax")) {
313 align = SP_ASPECT_XMIN_YMAX;
314 } else if (!strcmp (c, "xMidYMax")) {
315 align = SP_ASPECT_XMID_YMAX;
316 } else if (!strcmp (c, "xMaxYMax")) {
317 align = SP_ASPECT_XMAX_YMAX;
318 } else {
319 break;
320 }
321 clip = SP_ASPECT_MEET;
322 while (*e && *e == 32) e += 1;
323 if (e) {
324 if (!strcmp (e, "meet")) {
325 clip = SP_ASPECT_MEET;
326 } else if (!strcmp (e, "slice")) {
327 clip = SP_ASPECT_SLICE;
328 } else {
329 break;
330 }
331 }
332 marker->aspect_set = TRUE;
333 marker->aspect_align = align;
334 marker->aspect_clip = clip;
335 }
336 break;
337 default:
338 if (((SPObjectClass *) parent_class)->set)
339 ((SPObjectClass *) parent_class)->set (object, key, value);
340 break;
341 }
342 }
344 /**
345 * Updates <marker> when its attributes have changed. Takes care of setting up
346 * transformations and viewBoxes.
347 */
348 static void
349 sp_marker_update (SPObject *object, SPCtx *ctx, guint flags)
350 {
351 SPItem *item;
352 SPMarker *marker;
353 SPItemCtx rctx;
354 NRRect *vb;
355 double x, y, width, height;
356 NRMatrix q;
357 SPMarkerView *v;
359 item = SP_ITEM (object);
360 marker = SP_MARKER (object);
362 /* fixme: We have to set up clip here too */
364 /* Copy parent context */
365 rctx.ctx = *ctx;
366 /* Initialize tranformations */
367 rctx.i2doc = NR::identity();
368 rctx.i2vp = NR::identity();
369 /* Set up viewport */
370 rctx.vp.x0 = 0.0;
371 rctx.vp.y0 = 0.0;
372 rctx.vp.x1 = marker->markerWidth.computed;
373 rctx.vp.y1 = marker->markerHeight.computed;
375 /* Start with identity transform */
376 nr_matrix_set_identity (&marker->c2p);
378 /* Viewbox is always present, either implicitly or explicitly */
379 if (marker->viewBox_set) {
380 vb = &marker->viewBox;
381 } else {
382 vb = &rctx.vp;
383 }
384 /* Now set up viewbox transformation */
385 /* Determine actual viewbox in viewport coordinates */
386 if (marker->aspect_align == SP_ASPECT_NONE) {
387 x = 0.0;
388 y = 0.0;
389 width = rctx.vp.x1 - rctx.vp.x0;
390 height = rctx.vp.y1 - rctx.vp.y0;
391 } else {
392 double scalex, scaley, scale;
393 /* Things are getting interesting */
394 scalex = (rctx.vp.x1 - rctx.vp.x0) / (vb->x1 - vb->x0);
395 scaley = (rctx.vp.y1 - rctx.vp.y0) / (vb->y1 - vb->y0);
396 scale = (marker->aspect_clip == SP_ASPECT_MEET) ? MIN (scalex, scaley) : MAX (scalex, scaley);
397 width = (vb->x1 - vb->x0) * scale;
398 height = (vb->y1 - vb->y0) * scale;
399 /* Now place viewbox to requested position */
400 switch (marker->aspect_align) {
401 case SP_ASPECT_XMIN_YMIN:
402 x = 0.0;
403 y = 0.0;
404 break;
405 case SP_ASPECT_XMID_YMIN:
406 x = 0.5 * ((rctx.vp.x1 - rctx.vp.x0) - width);
407 y = 0.0;
408 break;
409 case SP_ASPECT_XMAX_YMIN:
410 x = 1.0 * ((rctx.vp.x1 - rctx.vp.x0) - width);
411 y = 0.0;
412 break;
413 case SP_ASPECT_XMIN_YMID:
414 x = 0.0;
415 y = 0.5 * ((rctx.vp.y1 - rctx.vp.y0) - height);
416 break;
417 case SP_ASPECT_XMID_YMID:
418 x = 0.5 * ((rctx.vp.x1 - rctx.vp.x0) - width);
419 y = 0.5 * ((rctx.vp.y1 - rctx.vp.y0) - height);
420 break;
421 case SP_ASPECT_XMAX_YMID:
422 x = 1.0 * ((rctx.vp.x1 - rctx.vp.x0) - width);
423 y = 0.5 * ((rctx.vp.y1 - rctx.vp.y0) - height);
424 break;
425 case SP_ASPECT_XMIN_YMAX:
426 x = 0.0;
427 y = 1.0 * ((rctx.vp.y1 - rctx.vp.y0) - height);
428 break;
429 case SP_ASPECT_XMID_YMAX:
430 x = 0.5 * ((rctx.vp.x1 - rctx.vp.x0) - width);
431 y = 1.0 * ((rctx.vp.y1 - rctx.vp.y0) - height);
432 break;
433 case SP_ASPECT_XMAX_YMAX:
434 x = 1.0 * ((rctx.vp.x1 - rctx.vp.x0) - width);
435 y = 1.0 * ((rctx.vp.y1 - rctx.vp.y0) - height);
436 break;
437 default:
438 x = 0.0;
439 y = 0.0;
440 break;
441 }
442 }
443 /* Compose additional transformation from scale and position */
444 q.c[0] = width / (vb->x1 - vb->x0);
445 q.c[1] = 0.0;
446 q.c[2] = 0.0;
447 q.c[3] = height / (vb->y1 - vb->y0);
448 q.c[4] = -vb->x0 * q.c[0] + x;
449 q.c[5] = -vb->y0 * q.c[3] + y;
450 /* Append viewbox transformation */
451 nr_matrix_multiply (&marker->c2p, &q, &marker->c2p);
454 /* Append reference translation */
455 /* fixme: lala (Lauris) */
456 nr_matrix_set_translate (&q, -marker->refX.computed, -marker->refY.computed);
457 nr_matrix_multiply (&marker->c2p, &q, &marker->c2p);
459 rctx.i2doc = marker->c2p * rctx.i2doc;
461 /* If viewBox is set reinitialize child viewport */
462 /* Otherwise it already correct */
463 if (marker->viewBox_set) {
464 rctx.vp.x0 = marker->viewBox.x0;
465 rctx.vp.y0 = marker->viewBox.y0;
466 rctx.vp.x1 = marker->viewBox.x1;
467 rctx.vp.y1 = marker->viewBox.y1;
468 rctx.i2vp = NR::identity();
469 }
471 /* And invoke parent method */
472 if (((SPObjectClass *) (parent_class))->update)
473 ((SPObjectClass *) (parent_class))->update (object, (SPCtx *) &rctx, flags);
475 /* As last step set additional transform of arena group */
476 for (v = marker->views; v != NULL; v = v->next) {
477 for (unsigned i = 0 ; i < v->size ; i++) {
478 if (v->items[i]) {
479 nr_arena_group_set_child_transform(NR_ARENA_GROUP(v->items[i]), &marker->c2p);
480 }
481 }
482 }
483 }
485 /**
486 * Writes the object's properties into its repr object.
487 */
488 static Inkscape::XML::Node *
489 sp_marker_write (SPObject *object, Inkscape::XML::Node *repr, guint flags)
490 {
491 SPMarker *marker;
493 marker = SP_MARKER (object);
495 if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
496 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_OBJECT_DOCUMENT(object));
497 repr = xml_doc->createElement("svg:marker");
498 }
500 if (marker->markerUnits_set) {
501 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
502 repr->setAttribute("markerUnits", "strokeWidth");
503 } else {
504 repr->setAttribute("markerUnits", "userSpaceOnUse");
505 }
506 } else {
507 repr->setAttribute("markerUnits", NULL);
508 }
509 if (marker->refX._set) {
510 sp_repr_set_svg_double(repr, "refX", marker->refX.computed);
511 } else {
512 repr->setAttribute("refX", NULL);
513 }
514 if (marker->refY._set) {
515 sp_repr_set_svg_double (repr, "refY", marker->refY.computed);
516 } else {
517 repr->setAttribute("refY", NULL);
518 }
519 if (marker->markerWidth._set) {
520 sp_repr_set_svg_double (repr, "markerWidth", marker->markerWidth.computed);
521 } else {
522 repr->setAttribute("markerWidth", NULL);
523 }
524 if (marker->markerHeight._set) {
525 sp_repr_set_svg_double (repr, "markerHeight", marker->markerHeight.computed);
526 } else {
527 repr->setAttribute("markerHeight", NULL);
528 }
529 if (marker->orient_set) {
530 if (marker->orient_auto) {
531 repr->setAttribute("orient", "auto");
532 } else {
533 sp_repr_set_css_double(repr, "orient", marker->orient);
534 }
535 } else {
536 repr->setAttribute("orient", NULL);
537 }
538 /* fixme: */
539 repr->setAttribute("viewBox", object->repr->attribute("viewBox"));
540 repr->setAttribute("preserveAspectRatio", object->repr->attribute("preserveAspectRatio"));
542 if (((SPObjectClass *) (parent_class))->write)
543 ((SPObjectClass *) (parent_class))->write (object, repr, flags);
545 return repr;
546 }
548 /**
549 * This routine is disabled to break propagation.
550 */
551 static NRArenaItem *
552 sp_marker_private_show (SPItem */*item*/, NRArena */*arena*/, unsigned int /*key*/, unsigned int /*flags*/)
553 {
554 /* Break propagation */
555 return NULL;
556 }
558 /**
559 * This routine is disabled to break propagation.
560 */
561 static void
562 sp_marker_private_hide (SPItem */*item*/, unsigned int /*key*/)
563 {
564 /* Break propagation */
565 }
567 /**
568 * This routine is disabled to break propagation.
569 */
570 static void
571 sp_marker_bbox(SPItem const *, NRRect *, NR::Matrix const &, unsigned const)
572 {
573 /* Break propagation */
574 }
576 /**
577 * This routine is disabled to break propagation.
578 */
579 static void
580 sp_marker_print (SPItem */*item*/, SPPrintContext */*ctx*/)
581 {
582 /* Break propagation */
583 }
585 /* fixme: Remove link if zero-sized (Lauris) */
587 /**
588 * Removes any SPMarkerViews that a marker has with a specific key.
589 * Set up the NRArenaItem array's size in the specified SPMarker's SPMarkerView.
590 * This is called from sp_shape_update() for shapes that have markers. It
591 * removes the old view of the marker and establishes a new one, registering
592 * it with the marker's list of views for future updates.
593 *
594 * \param marker Marker to create views in.
595 * \param key Key to give each SPMarkerView.
596 * \param size Number of NRArenaItems to put in the SPMarkerView.
597 */
598 void
599 sp_marker_show_dimension (SPMarker *marker, unsigned int key, unsigned int size)
600 {
601 SPMarkerView *view;
602 unsigned int i;
604 for (view = marker->views; view != NULL; view = view->next) {
605 if (view->key == key) break;
606 }
607 if (view && (view->size != size)) {
608 /* Free old view and allocate new */
609 /* Parent class ::hide method */
610 ((SPItemClass *) parent_class)->hide ((SPItem *) marker, key);
611 sp_marker_view_remove (marker, view, TRUE);
612 view = NULL;
613 }
614 if (!view) {
615 view = (SPMarkerView *)g_malloc (sizeof (SPMarkerView) + (size) * sizeof (NRArenaItem *));
616 for (i = 0; i < size; i++) view->items[i] = NULL;
617 view->next = marker->views;
618 marker->views = view;
619 view->key = key;
620 view->size = size;
621 }
622 }
624 /**
625 * Shows an instance of a marker. This is called during sp_shape_update_marker_view()
626 * show and transform a child item in the arena for all views with the given key.
627 */
628 NRArenaItem *
629 sp_marker_show_instance (SPMarker *marker, NRArenaItem *parent,
630 unsigned int key, unsigned int pos,
631 NR::Matrix const &base, float linewidth)
632 {
633 for (SPMarkerView *v = marker->views; v != NULL; v = v->next) {
634 if (v->key == key) {
635 if (pos >= v->size) {
636 return NULL;
637 }
638 if (!v->items[pos]) {
639 /* Parent class ::show method */
640 v->items[pos] = ((SPItemClass *) parent_class)->show ((SPItem *) marker,
641 parent->arena, key,
642 SP_ITEM_REFERENCE_FLAGS);
643 if (v->items[pos]) {
644 /* fixme: Position (Lauris) */
645 nr_arena_item_add_child (parent, v->items[pos], NULL);
646 /* nr_arena_item_unref (v->items[pos]); */
647 nr_arena_group_set_child_transform((NRArenaGroup *) v->items[pos], &marker->c2p);
648 }
649 }
650 if (v->items[pos]) {
651 NR::Matrix m;
652 if (marker->orient_auto) {
653 m = base;
654 } else {
655 /* fixme: Orient units (Lauris) */
656 m = NR::Matrix(rotate_degrees(marker->orient));
657 m *= get_translation(base);
658 }
659 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
660 m = NR::scale(linewidth) * m;
661 }
663 nr_arena_item_set_transform(v->items[pos], m);
664 }
665 return v->items[pos];
666 }
667 }
669 return NULL;
670 }
672 /**
673 * Hides/removes all views of the given marker that have key 'key'.
674 * This replaces SPItem implementation because we have our own views
675 * \param key SPMarkerView key to hide.
676 */
677 void
678 sp_marker_hide (SPMarker *marker, unsigned int key)
679 {
680 SPMarkerView *v;
682 v = marker->views;
683 while (v != NULL) {
684 SPMarkerView *next;
685 next = v->next;
686 if (v->key == key) {
687 /* Parent class ::hide method */
688 ((SPItemClass *) parent_class)->hide ((SPItem *) marker, key);
689 sp_marker_view_remove (marker, v, TRUE);
690 return;
691 }
692 v = next;
693 }
694 }
696 /**
697 * Removes a given view. Also will destroy sub-items in the view if destroyitems
698 * is set to a non-zero value.
699 */
700 static void
701 sp_marker_view_remove (SPMarker *marker, SPMarkerView *view, unsigned int destroyitems)
702 {
703 unsigned int i;
704 if (view == marker->views) {
705 marker->views = view->next;
706 } else {
707 SPMarkerView *v;
708 for (v = marker->views; v->next != view; v = v->next) if (!v->next) return;
709 v->next = view->next;
710 }
711 if (destroyitems) {
712 for (i = 0; i < view->size; i++) {
713 /* We have to walk through the whole array because there may be hidden items */
714 if (view->items[i]) nr_arena_item_unref (view->items[i]);
715 }
716 }
717 g_free (view);
718 }
720 const gchar *
721 generate_marker (GSList *reprs, NR::Rect bounds, SPDocument *document, NR::Matrix /*transform*/, NR::Matrix move)
722 {
723 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(document);
724 Inkscape::XML::Node *defsrepr = SP_OBJECT_REPR (SP_DOCUMENT_DEFS (document));
726 Inkscape::XML::Node *repr = xml_doc->createElement("svg:marker");
728 // Uncommenting this will make the marker fixed-size independent of stroke width.
729 // Commented out for consistency with standard markers which scale when you change
730 // stroke width:
731 //repr->setAttribute("markerUnits", "userSpaceOnUse");
733 sp_repr_set_svg_double(repr, "markerWidth", bounds.extent(NR::X));
734 sp_repr_set_svg_double(repr, "markerHeight", bounds.extent(NR::Y));
736 repr->setAttribute("orient", "auto");
738 defsrepr->appendChild(repr);
739 const gchar *mark_id = repr->attribute("id");
740 SPObject *mark_object = document->getObjectById(mark_id);
742 for (GSList *i = reprs; i != NULL; i = i->next) {
743 Inkscape::XML::Node *node = (Inkscape::XML::Node *)(i->data);
744 SPItem *copy = SP_ITEM(mark_object->appendChildRepr(node));
746 NR::Matrix dup_transform;
747 if (!sp_svg_transform_read (node->attribute("transform"), &dup_transform))
748 dup_transform = NR::identity();
749 dup_transform *= move;
751 sp_item_write_transform(copy, SP_OBJECT_REPR(copy), dup_transform);
752 }
754 Inkscape::GC::release(repr);
755 return mark_id;
756 }