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-matrix-translate-ops.h"
24 #include "libnr/nr-scale-matrix-ops.h"
25 #include "libnr/nr-translate-matrix-ops.h"
26 #include "libnr/nr-rotate-fns.h"
27 #include "svg/svg.h"
28 #include "display/nr-arena-group.h"
29 #include "xml/repr.h"
30 #include "attributes.h"
31 #include "marker.h"
32 #include "document.h"
33 #include "document-private.h"
35 struct SPMarkerView {
36 SPMarkerView *next;
37 unsigned int key;
38 unsigned int size;
39 NRArenaItem *items[1];
40 };
42 static void sp_marker_class_init (SPMarkerClass *klass);
43 static void sp_marker_init (SPMarker *marker);
45 static void sp_marker_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
46 static void sp_marker_release (SPObject *object);
47 static void sp_marker_set (SPObject *object, unsigned int key, const gchar *value);
48 static void sp_marker_update (SPObject *object, SPCtx *ctx, guint flags);
49 static Inkscape::XML::Node *sp_marker_write (SPObject *object, Inkscape::XML::Node *repr, guint flags);
51 static NRArenaItem *sp_marker_private_show (SPItem *item, NRArena *arena, unsigned int key, unsigned int flags);
52 static void sp_marker_private_hide (SPItem *item, unsigned int key);
53 static void sp_marker_bbox(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags);
54 static void sp_marker_print (SPItem *item, SPPrintContext *ctx);
56 static void sp_marker_view_remove (SPMarker *marker, SPMarkerView *view, unsigned int destroyitems);
58 static SPGroupClass *parent_class;
60 /**
61 * Registers the SPMarker class with Gdk and returns its type number.
62 */
63 GType
64 sp_marker_get_type (void)
65 {
66 static GType type = 0;
67 if (!type) {
68 GTypeInfo info = {
69 sizeof (SPMarkerClass),
70 NULL, NULL,
71 (GClassInitFunc) sp_marker_class_init,
72 NULL, NULL,
73 sizeof (SPMarker),
74 16,
75 (GInstanceInitFunc) sp_marker_init,
76 NULL, /* value_table */
77 };
78 type = g_type_register_static (SP_TYPE_GROUP, "SPMarker", &info, (GTypeFlags)0);
79 }
80 return type;
81 }
83 /**
84 * Initializes a SPMarkerClass object. Establishes the function pointers to the class'
85 * member routines in the class vtable, and sets pointers to parent classes.
86 */
87 static void
88 sp_marker_class_init (SPMarkerClass *klass)
89 {
90 GObjectClass *object_class;
91 SPObjectClass *sp_object_class;
92 SPItemClass *sp_item_class;
94 object_class = G_OBJECT_CLASS (klass);
95 sp_object_class = (SPObjectClass *) klass;
96 sp_item_class = (SPItemClass *) klass;
98 parent_class = (SPGroupClass *)g_type_class_ref (SP_TYPE_GROUP);
100 sp_object_class->build = sp_marker_build;
101 sp_object_class->release = sp_marker_release;
102 sp_object_class->set = sp_marker_set;
103 sp_object_class->update = sp_marker_update;
104 sp_object_class->write = sp_marker_write;
106 sp_item_class->show = sp_marker_private_show;
107 sp_item_class->hide = sp_marker_private_hide;
108 sp_item_class->bbox = sp_marker_bbox;
109 sp_item_class->print = sp_marker_print;
110 }
112 /**
113 * Initializes an SPMarker object. This notes the marker's viewBox is
114 * not set and initializes the marker's c2p identity matrix.
115 */
116 static void
117 sp_marker_init (SPMarker *marker)
118 {
119 marker->viewBox_set = FALSE;
121 marker->c2p.set_identity();
122 }
124 /**
125 * Virtual build callback for SPMarker.
126 *
127 * This is to be invoked immediately after creation of an SPMarker. This
128 * method fills an SPMarker object with its SVG attributes, and calls the
129 * parent class' build routine to attach the object to its document and
130 * repr. The result will be creation of the whole document tree.
131 *
132 * \see sp_object_build()
133 */
134 static void
135 sp_marker_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
136 {
137 SPGroup *group;
138 SPMarker *marker;
140 group = (SPGroup *) object;
141 marker = (SPMarker *) object;
143 sp_object_read_attr (object, "markerUnits");
144 sp_object_read_attr (object, "refX");
145 sp_object_read_attr (object, "refY");
146 sp_object_read_attr (object, "markerWidth");
147 sp_object_read_attr (object, "markerHeight");
148 sp_object_read_attr (object, "orient");
149 sp_object_read_attr (object, "viewBox");
150 sp_object_read_attr (object, "preserveAspectRatio");
152 if (((SPObjectClass *) parent_class)->build)
153 ((SPObjectClass *) parent_class)->build (object, document, repr);
154 }
156 /**
157 * Removes, releases and unrefs all children of object
158 *
159 * This is the inverse of sp_marker_build(). It must be invoked as soon
160 * as the marker is removed from the tree, even if it is still referenced
161 * by other objects. It hides and removes any views of the marker, then
162 * calls the parent classes' release function to deregister the object
163 * and release its SPRepr bindings. The result will be the destruction
164 * of the entire document tree.
165 *
166 * \see sp_object_release()
167 */
168 static void
169 sp_marker_release (SPObject *object)
170 {
171 SPMarker *marker;
173 marker = (SPMarker *) object;
175 while (marker->views) {
176 /* Destroy all NRArenaitems etc. */
177 /* Parent class ::hide method */
178 ((SPItemClass *) parent_class)->hide ((SPItem *) marker, marker->views->key);
179 sp_marker_view_remove (marker, marker->views, TRUE);
180 }
182 if (((SPObjectClass *) parent_class)->release)
183 ((SPObjectClass *) parent_class)->release (object);
184 }
186 /**
187 * Sets an attribute, 'key', of a marker object to 'value'. Supported
188 * attributes that can be set with this routine include:
189 *
190 * SP_ATTR_MARKERUNITS
191 * SP_ATTR_REFX
192 * SP_ATTR_REFY
193 * SP_ATTR_MARKERWIDTH
194 * SP_ATTR_MARKERHEIGHT
195 * SP_ATTR_ORIENT
196 * SP_ATTR_VIEWBOX
197 * SP_ATTR_PRESERVEASPECTRATIO
198 */
199 static void
200 sp_marker_set (SPObject *object, unsigned int key, const gchar *value)
201 {
202 SPItem *item;
203 SPMarker *marker;
205 item = SP_ITEM (object);
206 marker = SP_MARKER (object);
208 switch (key) {
209 case SP_ATTR_MARKERUNITS:
210 marker->markerUnits_set = FALSE;
211 marker->markerUnits = SP_MARKER_UNITS_STROKEWIDTH;
212 if (value) {
213 if (!strcmp (value, "strokeWidth")) {
214 marker->markerUnits_set = TRUE;
215 } else if (!strcmp (value, "userSpaceOnUse")) {
216 marker->markerUnits = SP_MARKER_UNITS_USERSPACEONUSE;
217 marker->markerUnits_set = TRUE;
218 }
219 }
220 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
221 break;
222 case SP_ATTR_REFX:
223 marker->refX.readOrUnset(value);
224 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
225 break;
226 case SP_ATTR_REFY:
227 marker->refY.readOrUnset(value);
228 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
229 break;
230 case SP_ATTR_MARKERWIDTH:
231 marker->markerWidth.readOrUnset(value, SVGLength::NONE, 3.0, 3.0);
232 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
233 break;
234 case SP_ATTR_MARKERHEIGHT:
235 marker->markerHeight.readOrUnset(value, SVGLength::NONE, 3.0, 3.0);
236 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
237 break;
238 case SP_ATTR_ORIENT:
239 marker->orient_set = FALSE;
240 marker->orient_auto = FALSE;
241 marker->orient = 0.0;
242 if (value) {
243 if (!strcmp (value, "auto")) {
244 marker->orient_auto = TRUE;
245 marker->orient_set = TRUE;
246 } else if (sp_svg_number_read_f (value, &marker->orient)) {
247 marker->orient_set = TRUE;
248 }
249 }
250 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
251 break;
252 case SP_ATTR_VIEWBOX:
253 marker->viewBox_set = FALSE;
254 if (value) {
255 double x, y, width, height;
256 char *eptr;
257 /* fixme: We have to take original item affine into account */
258 /* fixme: Think (Lauris) */
259 eptr = (gchar *) value;
260 x = g_ascii_strtod (eptr, &eptr);
261 while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
262 y = g_ascii_strtod (eptr, &eptr);
263 while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
264 width = g_ascii_strtod (eptr, &eptr);
265 while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
266 height = g_ascii_strtod (eptr, &eptr);
267 while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
268 if ((width > 0) && (height > 0)) {
269 /* Set viewbox */
270 marker->viewBox.x0 = x;
271 marker->viewBox.y0 = y;
272 marker->viewBox.x1 = x + width;
273 marker->viewBox.y1 = y + height;
274 marker->viewBox_set = TRUE;
275 }
276 }
277 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
278 break;
279 case SP_ATTR_PRESERVEASPECTRATIO:
280 /* Do setup before, so we can use break to escape */
281 marker->aspect_set = FALSE;
282 marker->aspect_align = SP_ASPECT_NONE;
283 marker->aspect_clip = SP_ASPECT_MEET;
284 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
285 if (value) {
286 int len;
287 gchar c[256];
288 const gchar *p, *e;
289 unsigned int align, clip;
290 p = value;
291 while (*p && *p == 32) p += 1;
292 if (!*p) break;
293 e = p;
294 while (*e && *e != 32) e += 1;
295 len = e - p;
296 if (len > 8) break;
297 memcpy (c, value, len);
298 c[len] = 0;
299 /* Now the actual part */
300 if (!strcmp (c, "none")) {
301 align = SP_ASPECT_NONE;
302 } else if (!strcmp (c, "xMinYMin")) {
303 align = SP_ASPECT_XMIN_YMIN;
304 } else if (!strcmp (c, "xMidYMin")) {
305 align = SP_ASPECT_XMID_YMIN;
306 } else if (!strcmp (c, "xMaxYMin")) {
307 align = SP_ASPECT_XMAX_YMIN;
308 } else if (!strcmp (c, "xMinYMid")) {
309 align = SP_ASPECT_XMIN_YMID;
310 } else if (!strcmp (c, "xMidYMid")) {
311 align = SP_ASPECT_XMID_YMID;
312 } else if (!strcmp (c, "xMaxYMin")) {
313 align = SP_ASPECT_XMAX_YMID;
314 } else if (!strcmp (c, "xMinYMax")) {
315 align = SP_ASPECT_XMIN_YMAX;
316 } else if (!strcmp (c, "xMidYMax")) {
317 align = SP_ASPECT_XMID_YMAX;
318 } else if (!strcmp (c, "xMaxYMax")) {
319 align = SP_ASPECT_XMAX_YMAX;
320 } else {
321 break;
322 }
323 clip = SP_ASPECT_MEET;
324 while (*e && *e == 32) e += 1;
325 if (e) {
326 if (!strcmp (e, "meet")) {
327 clip = SP_ASPECT_MEET;
328 } else if (!strcmp (e, "slice")) {
329 clip = SP_ASPECT_SLICE;
330 } else {
331 break;
332 }
333 }
334 marker->aspect_set = TRUE;
335 marker->aspect_align = align;
336 marker->aspect_clip = clip;
337 }
338 break;
339 default:
340 if (((SPObjectClass *) parent_class)->set)
341 ((SPObjectClass *) parent_class)->set (object, key, value);
342 break;
343 }
344 }
346 /**
347 * Updates <marker> when its attributes have changed. Takes care of setting up
348 * transformations and viewBoxes.
349 */
350 static void
351 sp_marker_update (SPObject *object, SPCtx *ctx, guint flags)
352 {
353 SPItem *item;
354 SPMarker *marker;
355 SPItemCtx rctx;
356 NRRect *vb;
357 double x, y, width, height;
358 SPMarkerView *v;
360 item = SP_ITEM (object);
361 marker = SP_MARKER (object);
363 /* fixme: We have to set up clip here too */
365 /* Copy parent context */
366 rctx.ctx = *ctx;
367 /* Initialize tranformations */
368 rctx.i2doc = NR::identity();
369 rctx.i2vp = NR::identity();
370 /* Set up viewport */
371 rctx.vp.x0 = 0.0;
372 rctx.vp.y0 = 0.0;
373 rctx.vp.x1 = marker->markerWidth.computed;
374 rctx.vp.y1 = marker->markerHeight.computed;
376 /* Start with identity transform */
377 marker->c2p.set_identity();
379 /* Viewbox is always present, either implicitly or explicitly */
380 if (marker->viewBox_set) {
381 vb = &marker->viewBox;
382 } else {
383 vb = &rctx.vp;
384 }
385 /* Now set up viewbox transformation */
386 /* Determine actual viewbox in viewport coordinates */
387 if (marker->aspect_align == SP_ASPECT_NONE) {
388 x = 0.0;
389 y = 0.0;
390 width = rctx.vp.x1 - rctx.vp.x0;
391 height = rctx.vp.y1 - rctx.vp.y0;
392 } else {
393 double scalex, scaley, scale;
394 /* Things are getting interesting */
395 scalex = (rctx.vp.x1 - rctx.vp.x0) / (vb->x1 - vb->x0);
396 scaley = (rctx.vp.y1 - rctx.vp.y0) / (vb->y1 - vb->y0);
397 scale = (marker->aspect_clip == SP_ASPECT_MEET) ? MIN (scalex, scaley) : MAX (scalex, scaley);
398 width = (vb->x1 - vb->x0) * scale;
399 height = (vb->y1 - vb->y0) * scale;
400 /* Now place viewbox to requested position */
401 switch (marker->aspect_align) {
402 case SP_ASPECT_XMIN_YMIN:
403 x = 0.0;
404 y = 0.0;
405 break;
406 case SP_ASPECT_XMID_YMIN:
407 x = 0.5 * ((rctx.vp.x1 - rctx.vp.x0) - width);
408 y = 0.0;
409 break;
410 case SP_ASPECT_XMAX_YMIN:
411 x = 1.0 * ((rctx.vp.x1 - rctx.vp.x0) - width);
412 y = 0.0;
413 break;
414 case SP_ASPECT_XMIN_YMID:
415 x = 0.0;
416 y = 0.5 * ((rctx.vp.y1 - rctx.vp.y0) - height);
417 break;
418 case SP_ASPECT_XMID_YMID:
419 x = 0.5 * ((rctx.vp.x1 - rctx.vp.x0) - width);
420 y = 0.5 * ((rctx.vp.y1 - rctx.vp.y0) - height);
421 break;
422 case SP_ASPECT_XMAX_YMID:
423 x = 1.0 * ((rctx.vp.x1 - rctx.vp.x0) - width);
424 y = 0.5 * ((rctx.vp.y1 - rctx.vp.y0) - height);
425 break;
426 case SP_ASPECT_XMIN_YMAX:
427 x = 0.0;
428 y = 1.0 * ((rctx.vp.y1 - rctx.vp.y0) - height);
429 break;
430 case SP_ASPECT_XMID_YMAX:
431 x = 0.5 * ((rctx.vp.x1 - rctx.vp.x0) - width);
432 y = 1.0 * ((rctx.vp.y1 - rctx.vp.y0) - height);
433 break;
434 case SP_ASPECT_XMAX_YMAX:
435 x = 1.0 * ((rctx.vp.x1 - rctx.vp.x0) - width);
436 y = 1.0 * ((rctx.vp.y1 - rctx.vp.y0) - height);
437 break;
438 default:
439 x = 0.0;
440 y = 0.0;
441 break;
442 }
443 }
445 {
446 NR::Matrix q;
447 /* Compose additional transformation from scale and position */
448 q[0] = width / (vb->x1 - vb->x0);
449 q[1] = 0.0;
450 q[2] = 0.0;
451 q[3] = height / (vb->y1 - vb->y0);
452 q[4] = -vb->x0 * q[0] + x;
453 q[5] = -vb->y0 * q[3] + y;
454 /* Append viewbox transformation */
455 marker->c2p = q * marker->c2p;
456 }
458 /* Append reference translation */
459 /* fixme: lala (Lauris) */
460 marker->c2p = NR::translate(-marker->refX.computed, -marker->refY.computed) * marker->c2p;
462 rctx.i2doc = marker->c2p * rctx.i2doc;
464 /* If viewBox is set reinitialize child viewport */
465 /* Otherwise it already correct */
466 if (marker->viewBox_set) {
467 rctx.vp.x0 = marker->viewBox.x0;
468 rctx.vp.y0 = marker->viewBox.y0;
469 rctx.vp.x1 = marker->viewBox.x1;
470 rctx.vp.y1 = marker->viewBox.y1;
471 rctx.i2vp = NR::identity();
472 }
474 /* And invoke parent method */
475 if (((SPObjectClass *) (parent_class))->update)
476 ((SPObjectClass *) (parent_class))->update (object, (SPCtx *) &rctx, flags);
478 /* As last step set additional transform of arena group */
479 for (v = marker->views; v != NULL; v = v->next) {
480 for (unsigned i = 0 ; i < v->size ; i++) {
481 if (v->items[i]) {
482 nr_arena_group_set_child_transform(NR_ARENA_GROUP(v->items[i]), &marker->c2p);
483 }
484 }
485 }
486 }
488 /**
489 * Writes the object's properties into its repr object.
490 */
491 static Inkscape::XML::Node *
492 sp_marker_write (SPObject *object, Inkscape::XML::Node *repr, guint flags)
493 {
494 SPMarker *marker;
496 marker = SP_MARKER (object);
498 if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
499 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_OBJECT_DOCUMENT(object));
500 repr = xml_doc->createElement("svg:marker");
501 }
503 if (marker->markerUnits_set) {
504 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
505 repr->setAttribute("markerUnits", "strokeWidth");
506 } else {
507 repr->setAttribute("markerUnits", "userSpaceOnUse");
508 }
509 } else {
510 repr->setAttribute("markerUnits", NULL);
511 }
512 if (marker->refX._set) {
513 sp_repr_set_svg_double(repr, "refX", marker->refX.computed);
514 } else {
515 repr->setAttribute("refX", NULL);
516 }
517 if (marker->refY._set) {
518 sp_repr_set_svg_double (repr, "refY", marker->refY.computed);
519 } else {
520 repr->setAttribute("refY", NULL);
521 }
522 if (marker->markerWidth._set) {
523 sp_repr_set_svg_double (repr, "markerWidth", marker->markerWidth.computed);
524 } else {
525 repr->setAttribute("markerWidth", NULL);
526 }
527 if (marker->markerHeight._set) {
528 sp_repr_set_svg_double (repr, "markerHeight", marker->markerHeight.computed);
529 } else {
530 repr->setAttribute("markerHeight", NULL);
531 }
532 if (marker->orient_set) {
533 if (marker->orient_auto) {
534 repr->setAttribute("orient", "auto");
535 } else {
536 sp_repr_set_css_double(repr, "orient", marker->orient);
537 }
538 } else {
539 repr->setAttribute("orient", NULL);
540 }
541 /* fixme: */
542 repr->setAttribute("viewBox", object->repr->attribute("viewBox"));
543 repr->setAttribute("preserveAspectRatio", object->repr->attribute("preserveAspectRatio"));
545 if (((SPObjectClass *) (parent_class))->write)
546 ((SPObjectClass *) (parent_class))->write (object, repr, flags);
548 return repr;
549 }
551 /**
552 * This routine is disabled to break propagation.
553 */
554 static NRArenaItem *
555 sp_marker_private_show (SPItem */*item*/, NRArena */*arena*/, unsigned int /*key*/, unsigned int /*flags*/)
556 {
557 /* Break propagation */
558 return NULL;
559 }
561 /**
562 * This routine is disabled to break propagation.
563 */
564 static void
565 sp_marker_private_hide (SPItem */*item*/, unsigned int /*key*/)
566 {
567 /* Break propagation */
568 }
570 /**
571 * This routine is disabled to break propagation.
572 */
573 static void
574 sp_marker_bbox(SPItem const *, NRRect *, NR::Matrix const &, unsigned const)
575 {
576 /* Break propagation */
577 }
579 /**
580 * This routine is disabled to break propagation.
581 */
582 static void
583 sp_marker_print (SPItem */*item*/, SPPrintContext */*ctx*/)
584 {
585 /* Break propagation */
586 }
588 /* fixme: Remove link if zero-sized (Lauris) */
590 /**
591 * Removes any SPMarkerViews that a marker has with a specific key.
592 * Set up the NRArenaItem array's size in the specified SPMarker's SPMarkerView.
593 * This is called from sp_shape_update() for shapes that have markers. It
594 * removes the old view of the marker and establishes a new one, registering
595 * it with the marker's list of views for future updates.
596 *
597 * \param marker Marker to create views in.
598 * \param key Key to give each SPMarkerView.
599 * \param size Number of NRArenaItems to put in the SPMarkerView.
600 */
601 void
602 sp_marker_show_dimension (SPMarker *marker, unsigned int key, unsigned int size)
603 {
604 SPMarkerView *view;
605 unsigned int i;
607 for (view = marker->views; view != NULL; view = view->next) {
608 if (view->key == key) break;
609 }
610 if (view && (view->size != size)) {
611 /* Free old view and allocate new */
612 /* Parent class ::hide method */
613 ((SPItemClass *) parent_class)->hide ((SPItem *) marker, key);
614 sp_marker_view_remove (marker, view, TRUE);
615 view = NULL;
616 }
617 if (!view) {
618 view = (SPMarkerView *)g_malloc (sizeof (SPMarkerView) + (size) * sizeof (NRArenaItem *));
619 for (i = 0; i < size; i++) view->items[i] = NULL;
620 view->next = marker->views;
621 marker->views = view;
622 view->key = key;
623 view->size = size;
624 }
625 }
627 /**
628 * Shows an instance of a marker. This is called during sp_shape_update_marker_view()
629 * show and transform a child item in the arena for all views with the given key.
630 */
631 NRArenaItem *
632 sp_marker_show_instance (SPMarker *marker, NRArenaItem *parent,
633 unsigned int key, unsigned int pos,
634 NR::Matrix const &base, float linewidth)
635 {
636 for (SPMarkerView *v = marker->views; v != NULL; v = v->next) {
637 if (v->key == key) {
638 if (pos >= v->size) {
639 return NULL;
640 }
641 if (!v->items[pos]) {
642 /* Parent class ::show method */
643 v->items[pos] = ((SPItemClass *) parent_class)->show ((SPItem *) marker,
644 parent->arena, key,
645 SP_ITEM_REFERENCE_FLAGS);
646 if (v->items[pos]) {
647 /* fixme: Position (Lauris) */
648 nr_arena_item_add_child (parent, v->items[pos], NULL);
649 /* nr_arena_item_unref (v->items[pos]); */
650 nr_arena_group_set_child_transform((NRArenaGroup *) v->items[pos], &marker->c2p);
651 }
652 }
653 if (v->items[pos]) {
654 NR::Matrix m;
655 if (marker->orient_auto) {
656 m = base;
657 } else {
658 /* fixme: Orient units (Lauris) */
659 m = NR::Matrix(rotate_degrees(marker->orient));
660 m *= get_translation(base);
661 }
662 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
663 m = NR::scale(linewidth) * m;
664 }
666 nr_arena_item_set_transform(v->items[pos], m);
667 }
668 return v->items[pos];
669 }
670 }
672 return NULL;
673 }
675 /**
676 * Hides/removes all views of the given marker that have key 'key'.
677 * This replaces SPItem implementation because we have our own views
678 * \param key SPMarkerView key to hide.
679 */
680 void
681 sp_marker_hide (SPMarker *marker, unsigned int key)
682 {
683 SPMarkerView *v;
685 v = marker->views;
686 while (v != NULL) {
687 SPMarkerView *next;
688 next = v->next;
689 if (v->key == key) {
690 /* Parent class ::hide method */
691 ((SPItemClass *) parent_class)->hide ((SPItem *) marker, key);
692 sp_marker_view_remove (marker, v, TRUE);
693 return;
694 }
695 v = next;
696 }
697 }
699 /**
700 * Removes a given view. Also will destroy sub-items in the view if destroyitems
701 * is set to a non-zero value.
702 */
703 static void
704 sp_marker_view_remove (SPMarker *marker, SPMarkerView *view, unsigned int destroyitems)
705 {
706 unsigned int i;
707 if (view == marker->views) {
708 marker->views = view->next;
709 } else {
710 SPMarkerView *v;
711 for (v = marker->views; v->next != view; v = v->next) if (!v->next) return;
712 v->next = view->next;
713 }
714 if (destroyitems) {
715 for (i = 0; i < view->size; i++) {
716 /* We have to walk through the whole array because there may be hidden items */
717 if (view->items[i]) nr_arena_item_unref (view->items[i]);
718 }
719 }
720 g_free (view);
721 }
723 const gchar *
724 generate_marker (GSList *reprs, NR::Rect bounds, SPDocument *document, NR::Matrix /*transform*/, NR::Matrix move)
725 {
726 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(document);
727 Inkscape::XML::Node *defsrepr = SP_OBJECT_REPR (SP_DOCUMENT_DEFS (document));
729 Inkscape::XML::Node *repr = xml_doc->createElement("svg:marker");
731 // Uncommenting this will make the marker fixed-size independent of stroke width.
732 // Commented out for consistency with standard markers which scale when you change
733 // stroke width:
734 //repr->setAttribute("markerUnits", "userSpaceOnUse");
736 sp_repr_set_svg_double(repr, "markerWidth", bounds.extent(NR::X));
737 sp_repr_set_svg_double(repr, "markerHeight", bounds.extent(NR::Y));
739 repr->setAttribute("orient", "auto");
741 defsrepr->appendChild(repr);
742 const gchar *mark_id = repr->attribute("id");
743 SPObject *mark_object = document->getObjectById(mark_id);
745 for (GSList *i = reprs; i != NULL; i = i->next) {
746 Inkscape::XML::Node *node = (Inkscape::XML::Node *)(i->data);
747 SPItem *copy = SP_ITEM(mark_object->appendChildRepr(node));
749 NR::Matrix dup_transform;
750 if (!sp_svg_transform_read (node->attribute("transform"), &dup_transform))
751 dup_transform = NR::identity();
752 dup_transform *= move;
754 sp_item_write_transform(copy, SP_OBJECT_REPR(copy), dup_transform);
755 }
757 Inkscape::GC::release(repr);
758 return mark_id;
759 }