5b3267257ede88eee9aa985216527361107b3889
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 * 2008 Johan Engelen
13 *
14 * Released under GNU GPL, read the file 'COPYING' for more information
15 */
17 #include <cstring>
18 #include <string>
19 #include "config.h"
22 #include "libnr/nr-matrix-fns.h"
23 #include "libnr/nr-matrix-ops.h"
24 #include "libnr/nr-matrix-translate-ops.h"
25 #include "libnr/nr-scale-matrix-ops.h"
26 #include "libnr/nr-translate-matrix-ops.h"
27 #include "libnr/nr-convert2geom.h"
28 #include <2geom/matrix.h>
29 #include "svg/svg.h"
30 #include "display/nr-arena-group.h"
31 #include "xml/repr.h"
32 #include "attributes.h"
33 #include "marker.h"
34 #include "document.h"
35 #include "document-private.h"
37 struct SPMarkerView {
38 SPMarkerView *next;
39 unsigned int key;
40 std::vector<NRArenaItem *> items;
41 };
43 static void sp_marker_class_init (SPMarkerClass *klass);
44 static void sp_marker_init (SPMarker *marker);
46 static void sp_marker_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
47 static void sp_marker_release (SPObject *object);
48 static void sp_marker_set (SPObject *object, unsigned int key, const gchar *value);
49 static void sp_marker_update (SPObject *object, SPCtx *ctx, guint flags);
50 static Inkscape::XML::Node *sp_marker_write (SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
52 static NRArenaItem *sp_marker_private_show (SPItem *item, NRArena *arena, unsigned int key, unsigned int flags);
53 static void sp_marker_private_hide (SPItem *item, unsigned int key);
54 static void sp_marker_bbox(SPItem const *item, NRRect *bbox, Geom::Matrix const &transform, unsigned const flags);
55 static void sp_marker_print (SPItem *item, SPPrintContext *ctx);
57 static void sp_marker_view_remove (SPMarker *marker, SPMarkerView *view, unsigned int destroyitems);
59 static SPGroupClass *parent_class;
61 /**
62 * Registers the SPMarker class with Gdk and returns its type number.
63 */
64 GType
65 sp_marker_get_type (void)
66 {
67 static GType type = 0;
68 if (!type) {
69 GTypeInfo info = {
70 sizeof (SPMarkerClass),
71 NULL, NULL,
72 (GClassInitFunc) sp_marker_class_init,
73 NULL, NULL,
74 sizeof (SPMarker),
75 16,
76 (GInstanceInitFunc) sp_marker_init,
77 NULL, /* value_table */
78 };
79 type = g_type_register_static (SP_TYPE_GROUP, "SPMarker", &info, (GTypeFlags)0);
80 }
81 return type;
82 }
84 /**
85 * Initializes a SPMarkerClass object. Establishes the function pointers to the class'
86 * member routines in the class vtable, and sets pointers to parent classes.
87 */
88 static void
89 sp_marker_class_init (SPMarkerClass *klass)
90 {
91 GObjectClass *object_class;
92 SPObjectClass *sp_object_class;
93 SPItemClass *sp_item_class;
95 object_class = G_OBJECT_CLASS (klass);
96 sp_object_class = (SPObjectClass *) klass;
97 sp_item_class = (SPItemClass *) klass;
99 parent_class = (SPGroupClass *)g_type_class_ref (SP_TYPE_GROUP);
101 sp_object_class->build = sp_marker_build;
102 sp_object_class->release = sp_marker_release;
103 sp_object_class->set = sp_marker_set;
104 sp_object_class->update = sp_marker_update;
105 sp_object_class->write = sp_marker_write;
107 sp_item_class->show = sp_marker_private_show;
108 sp_item_class->hide = sp_marker_private_hide;
109 sp_item_class->bbox = sp_marker_bbox;
110 sp_item_class->print = sp_marker_print;
111 }
113 /**
114 * Initializes an SPMarker object. This notes the marker's viewBox is
115 * not set and initializes the marker's c2p identity matrix.
116 */
117 static void
118 sp_marker_init (SPMarker *marker)
119 {
120 marker->viewBox_set = FALSE;
122 marker->c2p.setIdentity();
123 }
125 /**
126 * Virtual build callback for SPMarker.
127 *
128 * This is to be invoked immediately after creation of an SPMarker. This
129 * method fills an SPMarker object with its SVG attributes, and calls the
130 * parent class' build routine to attach the object to its document and
131 * repr. The result will be creation of the whole document tree.
132 *
133 * \see sp_object_build()
134 */
135 static void
136 sp_marker_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
137 {
138 SPGroup *group;
139 SPMarker *marker;
141 group = (SPGroup *) object;
142 marker = (SPMarker *) object;
144 sp_object_read_attr (object, "markerUnits");
145 sp_object_read_attr (object, "refX");
146 sp_object_read_attr (object, "refY");
147 sp_object_read_attr (object, "markerWidth");
148 sp_object_read_attr (object, "markerHeight");
149 sp_object_read_attr (object, "orient");
150 sp_object_read_attr (object, "viewBox");
151 sp_object_read_attr (object, "preserveAspectRatio");
153 if (((SPObjectClass *) parent_class)->build)
154 ((SPObjectClass *) parent_class)->build (object, document, repr);
155 }
157 /**
158 * Removes, releases and unrefs all children of object
159 *
160 * This is the inverse of sp_marker_build(). It must be invoked as soon
161 * as the marker is removed from the tree, even if it is still referenced
162 * by other objects. It hides and removes any views of the marker, then
163 * calls the parent classes' release function to deregister the object
164 * and release its SPRepr bindings. The result will be the destruction
165 * of the entire document tree.
166 *
167 * \see sp_object_release()
168 */
169 static void
170 sp_marker_release (SPObject *object)
171 {
172 SPMarker *marker;
174 marker = (SPMarker *) object;
176 while (marker->views) {
177 /* Destroy all NRArenaitems etc. */
178 /* Parent class ::hide method */
179 ((SPItemClass *) parent_class)->hide ((SPItem *) marker, marker->views->key);
180 sp_marker_view_remove (marker, marker->views, TRUE);
181 }
183 if (((SPObjectClass *) parent_class)->release)
184 ((SPObjectClass *) parent_class)->release (object);
185 }
187 /**
188 * Sets an attribute, 'key', of a marker object to 'value'. Supported
189 * attributes that can be set with this routine include:
190 *
191 * SP_ATTR_MARKERUNITS
192 * SP_ATTR_REFX
193 * SP_ATTR_REFY
194 * SP_ATTR_MARKERWIDTH
195 * SP_ATTR_MARKERHEIGHT
196 * SP_ATTR_ORIENT
197 * SP_ATTR_VIEWBOX
198 * SP_ATTR_PRESERVEASPECTRATIO
199 */
200 static void
201 sp_marker_set (SPObject *object, unsigned int key, const gchar *value)
202 {
203 SPItem *item;
204 SPMarker *marker;
206 item = SP_ITEM (object);
207 marker = SP_MARKER (object);
209 switch (key) {
210 case SP_ATTR_MARKERUNITS:
211 marker->markerUnits_set = FALSE;
212 marker->markerUnits = SP_MARKER_UNITS_STROKEWIDTH;
213 if (value) {
214 if (!strcmp (value, "strokeWidth")) {
215 marker->markerUnits_set = TRUE;
216 } else if (!strcmp (value, "userSpaceOnUse")) {
217 marker->markerUnits = SP_MARKER_UNITS_USERSPACEONUSE;
218 marker->markerUnits_set = TRUE;
219 }
220 }
221 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
222 break;
223 case SP_ATTR_REFX:
224 marker->refX.readOrUnset(value);
225 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
226 break;
227 case SP_ATTR_REFY:
228 marker->refY.readOrUnset(value);
229 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
230 break;
231 case SP_ATTR_MARKERWIDTH:
232 marker->markerWidth.readOrUnset(value, SVGLength::NONE, 3.0, 3.0);
233 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
234 break;
235 case SP_ATTR_MARKERHEIGHT:
236 marker->markerHeight.readOrUnset(value, SVGLength::NONE, 3.0, 3.0);
237 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
238 break;
239 case SP_ATTR_ORIENT:
240 marker->orient_set = FALSE;
241 marker->orient_auto = FALSE;
242 marker->orient = 0.0;
243 if (value) {
244 if (!strcmp (value, "auto")) {
245 marker->orient_auto = TRUE;
246 marker->orient_set = TRUE;
247 } else if (sp_svg_number_read_f (value, &marker->orient)) {
248 marker->orient_set = TRUE;
249 }
250 }
251 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
252 break;
253 case SP_ATTR_VIEWBOX:
254 marker->viewBox_set = FALSE;
255 if (value) {
256 double x, y, width, height;
257 char *eptr;
258 /* fixme: We have to take original item affine into account */
259 /* fixme: Think (Lauris) */
260 eptr = (gchar *) value;
261 x = g_ascii_strtod (eptr, &eptr);
262 while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
263 y = g_ascii_strtod (eptr, &eptr);
264 while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
265 width = g_ascii_strtod (eptr, &eptr);
266 while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
267 height = g_ascii_strtod (eptr, &eptr);
268 while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
269 if ((width > 0) && (height > 0)) {
270 /* Set viewbox */
271 marker->viewBox.x0 = x;
272 marker->viewBox.y0 = y;
273 marker->viewBox.x1 = x + width;
274 marker->viewBox.y1 = y + height;
275 marker->viewBox_set = TRUE;
276 }
277 }
278 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
279 break;
280 case SP_ATTR_PRESERVEASPECTRATIO:
281 /* Do setup before, so we can use break to escape */
282 marker->aspect_set = FALSE;
283 marker->aspect_align = SP_ASPECT_NONE;
284 marker->aspect_clip = SP_ASPECT_MEET;
285 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
286 if (value) {
287 int len;
288 gchar c[256];
289 const gchar *p, *e;
290 unsigned int align, clip;
291 p = value;
292 while (*p && *p == 32) p += 1;
293 if (!*p) break;
294 e = p;
295 while (*e && *e != 32) e += 1;
296 len = e - p;
297 if (len > 8) break;
298 memcpy (c, value, len);
299 c[len] = 0;
300 /* Now the actual part */
301 if (!strcmp (c, "none")) {
302 align = SP_ASPECT_NONE;
303 } else if (!strcmp (c, "xMinYMin")) {
304 align = SP_ASPECT_XMIN_YMIN;
305 } else if (!strcmp (c, "xMidYMin")) {
306 align = SP_ASPECT_XMID_YMIN;
307 } else if (!strcmp (c, "xMaxYMin")) {
308 align = SP_ASPECT_XMAX_YMIN;
309 } else if (!strcmp (c, "xMinYMid")) {
310 align = SP_ASPECT_XMIN_YMID;
311 } else if (!strcmp (c, "xMidYMid")) {
312 align = SP_ASPECT_XMID_YMID;
313 } else if (!strcmp (c, "xMaxYMin")) {
314 align = SP_ASPECT_XMAX_YMID;
315 } else if (!strcmp (c, "xMinYMax")) {
316 align = SP_ASPECT_XMIN_YMAX;
317 } else if (!strcmp (c, "xMidYMax")) {
318 align = SP_ASPECT_XMID_YMAX;
319 } else if (!strcmp (c, "xMaxYMax")) {
320 align = SP_ASPECT_XMAX_YMAX;
321 } else {
322 break;
323 }
324 clip = SP_ASPECT_MEET;
325 while (*e && *e == 32) e += 1;
326 if (*e) {
327 if (!strcmp (e, "meet")) {
328 clip = SP_ASPECT_MEET;
329 } else if (!strcmp (e, "slice")) {
330 clip = SP_ASPECT_SLICE;
331 } else {
332 break;
333 }
334 }
335 marker->aspect_set = TRUE;
336 marker->aspect_align = align;
337 marker->aspect_clip = clip;
338 }
339 break;
340 default:
341 if (((SPObjectClass *) parent_class)->set)
342 ((SPObjectClass *) parent_class)->set (object, key, value);
343 break;
344 }
345 }
347 /**
348 * Updates <marker> when its attributes have changed. Takes care of setting up
349 * transformations and viewBoxes.
350 */
351 static void
352 sp_marker_update (SPObject *object, SPCtx *ctx, guint flags)
353 {
354 SPItem *item;
355 SPMarker *marker;
356 SPItemCtx rctx;
357 NRRect *vb;
358 double x, y, width, height;
359 SPMarkerView *v;
361 item = SP_ITEM (object);
362 marker = SP_MARKER (object);
364 /* fixme: We have to set up clip here too */
366 /* Copy parent context */
367 rctx.ctx = *ctx;
368 /* Initialize tranformations */
369 rctx.i2doc = NR::identity();
370 rctx.i2vp = NR::identity();
371 /* Set up viewport */
372 rctx.vp.x0 = 0.0;
373 rctx.vp.y0 = 0.0;
374 rctx.vp.x1 = marker->markerWidth.computed;
375 rctx.vp.y1 = marker->markerHeight.computed;
377 /* Start with identity transform */
378 marker->c2p.setIdentity();
380 /* Viewbox is always present, either implicitly or explicitly */
381 if (marker->viewBox_set) {
382 vb = &marker->viewBox;
383 } else {
384 vb = &rctx.vp;
385 }
386 /* Now set up viewbox transformation */
387 /* Determine actual viewbox in viewport coordinates */
388 if (marker->aspect_align == SP_ASPECT_NONE) {
389 x = 0.0;
390 y = 0.0;
391 width = rctx.vp.x1 - rctx.vp.x0;
392 height = rctx.vp.y1 - rctx.vp.y0;
393 } else {
394 double scalex, scaley, scale;
395 /* Things are getting interesting */
396 scalex = (rctx.vp.x1 - rctx.vp.x0) / (vb->x1 - vb->x0);
397 scaley = (rctx.vp.y1 - rctx.vp.y0) / (vb->y1 - vb->y0);
398 scale = (marker->aspect_clip == SP_ASPECT_MEET) ? MIN (scalex, scaley) : MAX (scalex, scaley);
399 width = (vb->x1 - vb->x0) * scale;
400 height = (vb->y1 - vb->y0) * scale;
401 /* Now place viewbox to requested position */
402 switch (marker->aspect_align) {
403 case SP_ASPECT_XMIN_YMIN:
404 x = 0.0;
405 y = 0.0;
406 break;
407 case SP_ASPECT_XMID_YMIN:
408 x = 0.5 * ((rctx.vp.x1 - rctx.vp.x0) - width);
409 y = 0.0;
410 break;
411 case SP_ASPECT_XMAX_YMIN:
412 x = 1.0 * ((rctx.vp.x1 - rctx.vp.x0) - width);
413 y = 0.0;
414 break;
415 case SP_ASPECT_XMIN_YMID:
416 x = 0.0;
417 y = 0.5 * ((rctx.vp.y1 - rctx.vp.y0) - height);
418 break;
419 case SP_ASPECT_XMID_YMID:
420 x = 0.5 * ((rctx.vp.x1 - rctx.vp.x0) - width);
421 y = 0.5 * ((rctx.vp.y1 - rctx.vp.y0) - height);
422 break;
423 case SP_ASPECT_XMAX_YMID:
424 x = 1.0 * ((rctx.vp.x1 - rctx.vp.x0) - width);
425 y = 0.5 * ((rctx.vp.y1 - rctx.vp.y0) - height);
426 break;
427 case SP_ASPECT_XMIN_YMAX:
428 x = 0.0;
429 y = 1.0 * ((rctx.vp.y1 - rctx.vp.y0) - height);
430 break;
431 case SP_ASPECT_XMID_YMAX:
432 x = 0.5 * ((rctx.vp.x1 - rctx.vp.x0) - width);
433 y = 1.0 * ((rctx.vp.y1 - rctx.vp.y0) - height);
434 break;
435 case SP_ASPECT_XMAX_YMAX:
436 x = 1.0 * ((rctx.vp.x1 - rctx.vp.x0) - width);
437 y = 1.0 * ((rctx.vp.y1 - rctx.vp.y0) - height);
438 break;
439 default:
440 x = 0.0;
441 y = 0.0;
442 break;
443 }
444 }
446 {
447 Geom::Matrix q;
448 /* Compose additional transformation from scale and position */
449 q[0] = width / (vb->x1 - vb->x0);
450 q[1] = 0.0;
451 q[2] = 0.0;
452 q[3] = height / (vb->y1 - vb->y0);
453 q[4] = -vb->x0 * q[0] + x;
454 q[5] = -vb->y0 * q[3] + y;
455 /* Append viewbox transformation */
456 marker->c2p = q * marker->c2p;
457 }
459 /* Append reference translation */
460 /* fixme: lala (Lauris) */
461 marker->c2p = Geom::Translate(-marker->refX.computed, -marker->refY.computed) * marker->c2p;
463 rctx.i2doc = marker->c2p * rctx.i2doc;
465 /* If viewBox is set reinitialize child viewport */
466 /* Otherwise it already correct */
467 if (marker->viewBox_set) {
468 rctx.vp.x0 = marker->viewBox.x0;
469 rctx.vp.y0 = marker->viewBox.y0;
470 rctx.vp.x1 = marker->viewBox.x1;
471 rctx.vp.y1 = marker->viewBox.y1;
472 rctx.i2vp = Geom::identity();
473 }
475 /* And invoke parent method */
476 if (((SPObjectClass *) (parent_class))->update)
477 ((SPObjectClass *) (parent_class))->update (object, (SPCtx *) &rctx, flags);
479 /* As last step set additional transform of arena group */
480 for (v = marker->views; v != NULL; v = v->next) {
481 for (unsigned i = 0 ; i < v->items.size() ; i++) {
482 if (v->items[i]) {
483 Geom::Matrix tmp = marker->c2p;
484 nr_arena_group_set_child_transform(NR_ARENA_GROUP(v->items[i]), &tmp);
485 }
486 }
487 }
488 }
490 /**
491 * Writes the object's properties into its repr object.
492 */
493 static Inkscape::XML::Node *
494 sp_marker_write (SPObject *object, Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags)
495 {
496 SPMarker *marker;
498 marker = SP_MARKER (object);
500 if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
501 repr = xml_doc->createElement("svg:marker");
502 }
504 if (marker->markerUnits_set) {
505 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
506 repr->setAttribute("markerUnits", "strokeWidth");
507 } else {
508 repr->setAttribute("markerUnits", "userSpaceOnUse");
509 }
510 } else {
511 repr->setAttribute("markerUnits", NULL);
512 }
513 if (marker->refX._set) {
514 sp_repr_set_svg_double(repr, "refX", marker->refX.computed);
515 } else {
516 repr->setAttribute("refX", NULL);
517 }
518 if (marker->refY._set) {
519 sp_repr_set_svg_double (repr, "refY", marker->refY.computed);
520 } else {
521 repr->setAttribute("refY", NULL);
522 }
523 if (marker->markerWidth._set) {
524 sp_repr_set_svg_double (repr, "markerWidth", marker->markerWidth.computed);
525 } else {
526 repr->setAttribute("markerWidth", NULL);
527 }
528 if (marker->markerHeight._set) {
529 sp_repr_set_svg_double (repr, "markerHeight", marker->markerHeight.computed);
530 } else {
531 repr->setAttribute("markerHeight", NULL);
532 }
533 if (marker->orient_set) {
534 if (marker->orient_auto) {
535 repr->setAttribute("orient", "auto");
536 } else {
537 sp_repr_set_css_double(repr, "orient", marker->orient);
538 }
539 } else {
540 repr->setAttribute("orient", NULL);
541 }
542 /* fixme: */
543 repr->setAttribute("viewBox", object->repr->attribute("viewBox"));
544 repr->setAttribute("preserveAspectRatio", object->repr->attribute("preserveAspectRatio"));
546 if (((SPObjectClass *) (parent_class))->write)
547 ((SPObjectClass *) (parent_class))->write (object, xml_doc, repr, flags);
549 return repr;
550 }
552 /**
553 * This routine is disabled to break propagation.
554 */
555 static NRArenaItem *
556 sp_marker_private_show (SPItem */*item*/, NRArena */*arena*/, unsigned int /*key*/, unsigned int /*flags*/)
557 {
558 /* Break propagation */
559 return NULL;
560 }
562 /**
563 * This routine is disabled to break propagation.
564 */
565 static void
566 sp_marker_private_hide (SPItem */*item*/, unsigned int /*key*/)
567 {
568 /* Break propagation */
569 }
571 /**
572 * This routine is disabled to break propagation.
573 */
574 static void
575 sp_marker_bbox(SPItem const *, NRRect *, Geom::Matrix const &, unsigned const)
576 {
577 /* Break propagation */
578 }
580 /**
581 * This routine is disabled to break propagation.
582 */
583 static void
584 sp_marker_print (SPItem */*item*/, SPPrintContext */*ctx*/)
585 {
586 /* Break propagation */
587 }
589 /* fixme: Remove link if zero-sized (Lauris) */
591 /**
592 * Removes any SPMarkerViews that a marker has with a specific key.
593 * Set up the NRArenaItem array's size in the specified SPMarker's SPMarkerView.
594 * This is called from sp_shape_update() for shapes that have markers. It
595 * removes the old view of the marker and establishes a new one, registering
596 * it with the marker's list of views for future updates.
597 *
598 * \param marker Marker to create views in.
599 * \param key Key to give each SPMarkerView.
600 * \param size Number of NRArenaItems to put in the SPMarkerView.
601 */
602 void
603 sp_marker_show_dimension (SPMarker *marker, unsigned int key, unsigned int size)
604 {
605 SPMarkerView *view;
606 unsigned int i;
608 for (view = marker->views; view != NULL; view = view->next) {
609 if (view->key == key) break;
610 }
611 if (view && (view->items.size() != size)) {
612 /* Free old view and allocate new */
613 /* Parent class ::hide method */
614 ((SPItemClass *) parent_class)->hide ((SPItem *) marker, key);
615 sp_marker_view_remove (marker, view, TRUE);
616 view = NULL;
617 }
618 if (!view) {
619 view = (SPMarkerView *) g_new (SPMarkerView, 1);
620 new (&view->items) std::vector<NRArenaItem *>;
621 view->items.clear();
622 for (i = 0; i < size; i++) {
623 view->items.push_back(NULL);
624 }
625 view->next = marker->views;
626 marker->views = view;
627 view->key = key;
628 }
629 }
631 /**
632 * Shows an instance of a marker. This is called during sp_shape_update_marker_view()
633 * show and transform a child item in the arena for all views with the given key.
634 */
635 NRArenaItem *
636 sp_marker_show_instance ( SPMarker *marker, NRArenaItem *parent,
637 unsigned int key, unsigned int pos,
638 Geom::Matrix const &base, float linewidth)
639 {
640 for (SPMarkerView *v = marker->views; v != NULL; v = v->next) {
641 if (v->key == key) {
642 if (pos >= v->items.size()) {
643 return NULL;
644 }
645 if (!v->items[pos]) {
646 /* Parent class ::show method */
647 v->items[pos] = ((SPItemClass *) parent_class)->show ((SPItem *) marker,
648 parent->arena, key,
649 SP_ITEM_REFERENCE_FLAGS);
650 if (v->items[pos]) {
651 /* fixme: Position (Lauris) */
652 nr_arena_item_add_child (parent, v->items[pos], NULL);
653 /* nr_arena_item_unref (v->items[pos]); */
654 Geom::Matrix tmp = marker->c2p;
655 nr_arena_group_set_child_transform((NRArenaGroup *) v->items[pos], &tmp);
656 }
657 }
658 if (v->items[pos]) {
659 Geom::Matrix m;
660 if (marker->orient_auto) {
661 m = base;
662 } else {
663 /* fixme: Orient units (Lauris) */
664 m = Geom::Matrix(Geom::Rotate::from_degrees(marker->orient));
665 m *= Geom::Translate(base[4], base[5]); // TODO: this was NR::get_translation() originally; should it be extracted into a new 2geom function?
666 }
667 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
668 m = Geom::Scale(linewidth) * m;
669 }
671 nr_arena_item_set_transform(v->items[pos], m);
672 }
673 return v->items[pos];
674 }
675 }
677 return NULL;
678 }
680 /**
681 * Hides/removes all views of the given marker that have key 'key'.
682 * This replaces SPItem implementation because we have our own views
683 * \param key SPMarkerView key to hide.
684 */
685 void
686 sp_marker_hide (SPMarker *marker, unsigned int key)
687 {
688 SPMarkerView *v;
690 v = marker->views;
691 while (v != NULL) {
692 SPMarkerView *next;
693 next = v->next;
694 if (v->key == key) {
695 /* Parent class ::hide method */
696 ((SPItemClass *) parent_class)->hide ((SPItem *) marker, key);
697 sp_marker_view_remove (marker, v, TRUE);
698 return;
699 }
700 v = next;
701 }
702 }
704 /**
705 * Removes a given view. Also will destroy sub-items in the view if destroyitems
706 * is set to a non-zero value.
707 */
708 static void
709 sp_marker_view_remove (SPMarker *marker, SPMarkerView *view, unsigned int destroyitems)
710 {
711 unsigned int i;
712 if (view == marker->views) {
713 marker->views = view->next;
714 } else {
715 SPMarkerView *v;
716 for (v = marker->views; v->next != view; v = v->next) if (!v->next) return;
717 v->next = view->next;
718 }
719 if (destroyitems) {
720 for (i = 0; i < view->items.size(); i++) {
721 /* We have to walk through the whole array because there may be hidden items */
722 if (view->items[i]) nr_arena_item_unref (view->items[i]);
723 }
724 }
725 view->items.clear();
726 g_free (view);
727 }
729 const gchar *
730 generate_marker (GSList *reprs, Geom::Rect bounds, SPDocument *document, Geom::Matrix /*transform*/, Geom::Matrix move)
731 {
732 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(document);
733 Inkscape::XML::Node *defsrepr = SP_OBJECT_REPR (SP_DOCUMENT_DEFS (document));
735 Inkscape::XML::Node *repr = xml_doc->createElement("svg:marker");
737 // Uncommenting this will make the marker fixed-size independent of stroke width.
738 // Commented out for consistency with standard markers which scale when you change
739 // stroke width:
740 //repr->setAttribute("markerUnits", "userSpaceOnUse");
742 sp_repr_set_svg_double(repr, "markerWidth", bounds.dimensions()[Geom::X]);
743 sp_repr_set_svg_double(repr, "markerHeight", bounds.dimensions()[Geom::Y]);
745 repr->setAttribute("orient", "auto");
747 defsrepr->appendChild(repr);
748 const gchar *mark_id = repr->attribute("id");
749 SPObject *mark_object = document->getObjectById(mark_id);
751 for (GSList *i = reprs; i != NULL; i = i->next) {
752 Inkscape::XML::Node *node = (Inkscape::XML::Node *)(i->data);
753 SPItem *copy = SP_ITEM(mark_object->appendChildRepr(node));
755 Geom::Matrix dup_transform;
756 if (!sp_svg_transform_read (node->attribute("transform"), &dup_transform))
757 dup_transform = Geom::identity();
758 dup_transform *= move;
760 sp_item_write_transform(copy, SP_OBJECT_REPR(copy), dup_transform);
761 }
763 Inkscape::GC::release(repr);
764 return mark_id;
765 }
767 /*
768 Local Variables:
769 mode:c++
770 c-file-style:"stroustrup"
771 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
772 indent-tabs-mode:nil
773 fill-column:99
774 End:
775 */
776 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :