1 /*
2 * SVG <marker> implementation
3 *
4 * Authors:
5 * Lauris Kaplinski <lauris@kaplinski.com>
6 * Bryce Harrington <bryce@bryceharrington.org>
7 * Abhishek Sharma
8 *
9 * Copyright (C) 1999-2003 Lauris Kaplinski
10 * 2004-2006 Bryce Harrington
11 * 2008 Johan Engelen
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-convert2geom.h"
27 #include <2geom/matrix.h>
28 #include "svg/svg.h"
29 #include "display/nr-arena-group.h"
30 #include "xml/repr.h"
31 #include "attributes.h"
32 #include "marker.h"
33 #include "document.h"
34 #include "document-private.h"
36 struct SPMarkerView {
37 SPMarkerView *next;
38 unsigned int key;
39 std::vector<NRArenaItem *> items;
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::Document *doc, 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, Geom::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 = Geom::OptRect();
120 marker->c2p.setIdentity();
121 marker->views = NULL;
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 object->readAttr( "markerUnits" );
144 object->readAttr( "refX" );
145 object->readAttr( "refY" );
146 object->readAttr( "markerWidth" );
147 object->readAttr( "markerHeight" );
148 object->readAttr( "orient" );
149 object->readAttr( "viewBox" );
150 object->readAttr( "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 = Geom::OptRect();
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 = Geom::Rect( Geom::Point(x,y),
271 Geom::Point(x + width, y + height) );
272 }
273 }
274 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
275 break;
276 case SP_ATTR_PRESERVEASPECTRATIO:
277 /* Do setup before, so we can use break to escape */
278 marker->aspect_set = FALSE;
279 marker->aspect_align = SP_ASPECT_NONE;
280 marker->aspect_clip = SP_ASPECT_MEET;
281 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
282 if (value) {
283 int len;
284 gchar c[256];
285 const gchar *p, *e;
286 unsigned int align, clip;
287 p = value;
288 while (*p && *p == 32) p += 1;
289 if (!*p) break;
290 e = p;
291 while (*e && *e != 32) e += 1;
292 len = e - p;
293 if (len > 8) break;
294 memcpy (c, value, len);
295 c[len] = 0;
296 /* Now the actual part */
297 if (!strcmp (c, "none")) {
298 align = SP_ASPECT_NONE;
299 } else if (!strcmp (c, "xMinYMin")) {
300 align = SP_ASPECT_XMIN_YMIN;
301 } else if (!strcmp (c, "xMidYMin")) {
302 align = SP_ASPECT_XMID_YMIN;
303 } else if (!strcmp (c, "xMaxYMin")) {
304 align = SP_ASPECT_XMAX_YMIN;
305 } else if (!strcmp (c, "xMinYMid")) {
306 align = SP_ASPECT_XMIN_YMID;
307 } else if (!strcmp (c, "xMidYMid")) {
308 align = SP_ASPECT_XMID_YMID;
309 } else if (!strcmp (c, "xMaxYMid")) {
310 align = SP_ASPECT_XMAX_YMID;
311 } else if (!strcmp (c, "xMinYMax")) {
312 align = SP_ASPECT_XMIN_YMAX;
313 } else if (!strcmp (c, "xMidYMax")) {
314 align = SP_ASPECT_XMID_YMAX;
315 } else if (!strcmp (c, "xMaxYMax")) {
316 align = SP_ASPECT_XMAX_YMAX;
317 } else {
318 break;
319 }
320 clip = SP_ASPECT_MEET;
321 while (*e && *e == 32) e += 1;
322 if (*e) {
323 if (!strcmp (e, "meet")) {
324 clip = SP_ASPECT_MEET;
325 } else if (!strcmp (e, "slice")) {
326 clip = SP_ASPECT_SLICE;
327 } else {
328 break;
329 }
330 }
331 marker->aspect_set = TRUE;
332 marker->aspect_align = align;
333 marker->aspect_clip = clip;
334 }
335 break;
336 default:
337 if (((SPObjectClass *) parent_class)->set)
338 ((SPObjectClass *) parent_class)->set (object, key, value);
339 break;
340 }
341 }
343 /**
344 * Updates <marker> when its attributes have changed. Takes care of setting up
345 * transformations and viewBoxes.
346 */
347 static void
348 sp_marker_update (SPObject *object, SPCtx *ctx, guint flags)
349 {
350 SPItem *item;
351 SPMarker *marker;
352 SPItemCtx rctx;
353 Geom::Rect vb;
354 double x, y, width, height;
355 SPMarkerView *v;
357 item = SP_ITEM (object);
358 marker = SP_MARKER (object);
360 /* fixme: We have to set up clip here too */
362 /* Copy parent context */
363 rctx.ctx = *ctx;
364 /* Initialize tranformations */
365 rctx.i2doc = Geom::identity();
366 rctx.i2vp = Geom::identity();
367 /* Set up viewport */
368 rctx.vp.x0 = 0.0;
369 rctx.vp.y0 = 0.0;
370 rctx.vp.x1 = marker->markerWidth.computed;
371 rctx.vp.y1 = marker->markerHeight.computed;
373 /* Start with identity transform */
374 marker->c2p.setIdentity();
376 /* Viewbox is always present, either implicitly or explicitly */
377 if (marker->viewBox) {
378 vb = *marker->viewBox;
379 } else {
380 vb = *(rctx.vp.upgrade_2geom());
381 }
382 /* Now set up viewbox transformation */
383 /* Determine actual viewbox in viewport coordinates */
384 if (marker->aspect_align == SP_ASPECT_NONE) {
385 x = 0.0;
386 y = 0.0;
387 width = rctx.vp.x1 - rctx.vp.x0;
388 height = rctx.vp.y1 - rctx.vp.y0;
389 } else {
390 double scalex, scaley, scale;
391 /* Things are getting interesting */
392 scalex = (rctx.vp.x1 - rctx.vp.x0) / (vb.width());
393 scaley = (rctx.vp.y1 - rctx.vp.y0) / (vb.height());
394 scale = (marker->aspect_clip == SP_ASPECT_MEET) ? MIN (scalex, scaley) : MAX (scalex, scaley);
395 width = (vb.width()) * scale;
396 height = (vb.height()) * scale;
397 /* Now place viewbox to requested position */
398 switch (marker->aspect_align) {
399 case SP_ASPECT_XMIN_YMIN:
400 x = 0.0;
401 y = 0.0;
402 break;
403 case SP_ASPECT_XMID_YMIN:
404 x = 0.5 * ((rctx.vp.x1 - rctx.vp.x0) - width);
405 y = 0.0;
406 break;
407 case SP_ASPECT_XMAX_YMIN:
408 x = 1.0 * ((rctx.vp.x1 - rctx.vp.x0) - width);
409 y = 0.0;
410 break;
411 case SP_ASPECT_XMIN_YMID:
412 x = 0.0;
413 y = 0.5 * ((rctx.vp.y1 - rctx.vp.y0) - height);
414 break;
415 case SP_ASPECT_XMID_YMID:
416 x = 0.5 * ((rctx.vp.x1 - rctx.vp.x0) - width);
417 y = 0.5 * ((rctx.vp.y1 - rctx.vp.y0) - height);
418 break;
419 case SP_ASPECT_XMAX_YMID:
420 x = 1.0 * ((rctx.vp.x1 - rctx.vp.x0) - width);
421 y = 0.5 * ((rctx.vp.y1 - rctx.vp.y0) - height);
422 break;
423 case SP_ASPECT_XMIN_YMAX:
424 x = 0.0;
425 y = 1.0 * ((rctx.vp.y1 - rctx.vp.y0) - height);
426 break;
427 case SP_ASPECT_XMID_YMAX:
428 x = 0.5 * ((rctx.vp.x1 - rctx.vp.x0) - width);
429 y = 1.0 * ((rctx.vp.y1 - rctx.vp.y0) - height);
430 break;
431 case SP_ASPECT_XMAX_YMAX:
432 x = 1.0 * ((rctx.vp.x1 - rctx.vp.x0) - width);
433 y = 1.0 * ((rctx.vp.y1 - rctx.vp.y0) - height);
434 break;
435 default:
436 x = 0.0;
437 y = 0.0;
438 break;
439 }
440 }
442 // viewbox transformation and reference translation
443 marker->c2p = Geom::Translate(-marker->refX.computed, -marker->refY.computed) *
444 Geom::Scale(width / vb.width(), height / vb.height());
446 rctx.i2doc = marker->c2p * rctx.i2doc;
448 /* If viewBox is set reinitialize child viewport */
449 /* Otherwise it already correct */
450 if (marker->viewBox) {
451 rctx.vp.x0 = marker->viewBox->min()[Geom::X];
452 rctx.vp.y0 = marker->viewBox->min()[Geom::Y];
453 rctx.vp.x1 = marker->viewBox->max()[Geom::X];
454 rctx.vp.y1 = marker->viewBox->max()[Geom::Y];
455 rctx.i2vp = Geom::identity();
456 }
458 /* And invoke parent method */
459 if (((SPObjectClass *) (parent_class))->update)
460 ((SPObjectClass *) (parent_class))->update (object, (SPCtx *) &rctx, flags);
462 /* As last step set additional transform of arena group */
463 for (v = marker->views; v != NULL; v = v->next) {
464 for (unsigned i = 0 ; i < v->items.size() ; i++) {
465 if (v->items[i]) {
466 Geom::Matrix tmp = marker->c2p;
467 nr_arena_group_set_child_transform(NR_ARENA_GROUP(v->items[i]), &tmp);
468 }
469 }
470 }
471 }
473 /**
474 * Writes the object's properties into its repr object.
475 */
476 static Inkscape::XML::Node *
477 sp_marker_write (SPObject *object, Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags)
478 {
479 SPMarker *marker;
481 marker = SP_MARKER (object);
483 if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
484 repr = xml_doc->createElement("svg:marker");
485 }
487 if (marker->markerUnits_set) {
488 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
489 repr->setAttribute("markerUnits", "strokeWidth");
490 } else {
491 repr->setAttribute("markerUnits", "userSpaceOnUse");
492 }
493 } else {
494 repr->setAttribute("markerUnits", NULL);
495 }
496 if (marker->refX._set) {
497 sp_repr_set_svg_double(repr, "refX", marker->refX.computed);
498 } else {
499 repr->setAttribute("refX", NULL);
500 }
501 if (marker->refY._set) {
502 sp_repr_set_svg_double (repr, "refY", marker->refY.computed);
503 } else {
504 repr->setAttribute("refY", NULL);
505 }
506 if (marker->markerWidth._set) {
507 sp_repr_set_svg_double (repr, "markerWidth", marker->markerWidth.computed);
508 } else {
509 repr->setAttribute("markerWidth", NULL);
510 }
511 if (marker->markerHeight._set) {
512 sp_repr_set_svg_double (repr, "markerHeight", marker->markerHeight.computed);
513 } else {
514 repr->setAttribute("markerHeight", NULL);
515 }
516 if (marker->orient_set) {
517 if (marker->orient_auto) {
518 repr->setAttribute("orient", "auto");
519 } else {
520 sp_repr_set_css_double(repr, "orient", marker->orient);
521 }
522 } else {
523 repr->setAttribute("orient", NULL);
524 }
525 /* fixme: */
526 //XML Tree being used directly here while it shouldn't be....
527 repr->setAttribute("viewBox", object->getRepr()->attribute("viewBox"));
528 //XML Tree being used directly here while it shouldn't be....
529 repr->setAttribute("preserveAspectRatio", object->getRepr()->attribute("preserveAspectRatio"));
531 if (((SPObjectClass *) (parent_class))->write)
532 ((SPObjectClass *) (parent_class))->write (object, xml_doc, repr, flags);
534 return repr;
535 }
537 /**
538 * This routine is disabled to break propagation.
539 */
540 static NRArenaItem *
541 sp_marker_private_show (SPItem */*item*/, NRArena */*arena*/, unsigned int /*key*/, unsigned int /*flags*/)
542 {
543 /* Break propagation */
544 return NULL;
545 }
547 /**
548 * This routine is disabled to break propagation.
549 */
550 static void
551 sp_marker_private_hide (SPItem */*item*/, unsigned int /*key*/)
552 {
553 /* Break propagation */
554 }
556 /**
557 * This routine is disabled to break propagation.
558 */
559 static void
560 sp_marker_bbox(SPItem const *, NRRect *, Geom::Matrix const &, unsigned const)
561 {
562 /* Break propagation */
563 }
565 /**
566 * This routine is disabled to break propagation.
567 */
568 static void
569 sp_marker_print (SPItem */*item*/, SPPrintContext */*ctx*/)
570 {
571 /* Break propagation */
572 }
574 /* fixme: Remove link if zero-sized (Lauris) */
576 /**
577 * Removes any SPMarkerViews that a marker has with a specific key.
578 * Set up the NRArenaItem array's size in the specified SPMarker's SPMarkerView.
579 * This is called from sp_shape_update() for shapes that have markers. It
580 * removes the old view of the marker and establishes a new one, registering
581 * it with the marker's list of views for future updates.
582 *
583 * \param marker Marker to create views in.
584 * \param key Key to give each SPMarkerView.
585 * \param size Number of NRArenaItems to put in the SPMarkerView.
586 */
587 void
588 sp_marker_show_dimension (SPMarker *marker, unsigned int key, unsigned int size)
589 {
590 SPMarkerView *view;
591 unsigned int i;
593 for (view = marker->views; view != NULL; view = view->next) {
594 if (view->key == key) break;
595 }
596 if (view && (view->items.size() != size)) {
597 /* Free old view and allocate new */
598 /* Parent class ::hide method */
599 ((SPItemClass *) parent_class)->hide ((SPItem *) marker, key);
600 sp_marker_view_remove (marker, view, TRUE);
601 view = NULL;
602 }
603 if (!view) {
604 view = new SPMarkerView();
605 view->items.clear();
606 for (i = 0; i < size; i++) {
607 view->items.push_back(NULL);
608 }
609 view->next = marker->views;
610 marker->views = view;
611 view->key = key;
612 }
613 }
615 /**
616 * Shows an instance of a marker. This is called during sp_shape_update_marker_view()
617 * show and transform a child item in the arena for all views with the given key.
618 */
619 NRArenaItem *
620 sp_marker_show_instance ( SPMarker *marker, NRArenaItem *parent,
621 unsigned int key, unsigned int pos,
622 Geom::Matrix const &base, float linewidth)
623 {
624 for (SPMarkerView *v = marker->views; v != NULL; v = v->next) {
625 if (v->key == key) {
626 if (pos >= v->items.size()) {
627 return NULL;
628 }
629 if (!v->items[pos]) {
630 /* Parent class ::show method */
631 v->items[pos] = ((SPItemClass *) parent_class)->show ((SPItem *) marker,
632 parent->arena, key,
633 SP_ITEM_REFERENCE_FLAGS);
634 if (v->items[pos]) {
635 /* fixme: Position (Lauris) */
636 nr_arena_item_add_child (parent, v->items[pos], NULL);
637 /* nr_arena_item_unref (v->items[pos]); */
638 Geom::Matrix tmp = marker->c2p;
639 nr_arena_group_set_child_transform((NRArenaGroup *) v->items[pos], &tmp);
640 }
641 }
642 if (v->items[pos]) {
643 Geom::Matrix m;
644 if (marker->orient_auto) {
645 m = base;
646 } else {
647 /* fixme: Orient units (Lauris) */
648 m = Geom::Rotate::from_degrees(marker->orient);
649 m *= Geom::Translate(base.translation());
650 }
651 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
652 m = Geom::Scale(linewidth) * m;
653 }
655 nr_arena_item_set_transform(v->items[pos], m);
656 }
657 return v->items[pos];
658 }
659 }
661 return NULL;
662 }
664 /**
665 * Hides/removes all views of the given marker that have key 'key'.
666 * This replaces SPItem implementation because we have our own views
667 * \param key SPMarkerView key to hide.
668 */
669 void
670 sp_marker_hide (SPMarker *marker, unsigned int key)
671 {
672 SPMarkerView *v;
674 v = marker->views;
675 while (v != NULL) {
676 SPMarkerView *next;
677 next = v->next;
678 if (v->key == key) {
679 /* Parent class ::hide method */
680 ((SPItemClass *) parent_class)->hide ((SPItem *) marker, key);
681 sp_marker_view_remove (marker, v, TRUE);
682 return;
683 }
684 v = next;
685 }
686 }
688 /**
689 * Removes a given view. Also will destroy sub-items in the view if destroyitems
690 * is set to a non-zero value.
691 */
692 static void
693 sp_marker_view_remove (SPMarker *marker, SPMarkerView *view, unsigned int destroyitems)
694 {
695 unsigned int i;
696 if (view == marker->views) {
697 marker->views = view->next;
698 } else {
699 SPMarkerView *v;
700 for (v = marker->views; v->next != view; v = v->next) if (!v->next) return;
701 v->next = view->next;
702 }
703 if (destroyitems) {
704 for (i = 0; i < view->items.size(); i++) {
705 /* We have to walk through the whole array because there may be hidden items */
706 if (view->items[i]) nr_arena_item_unref (view->items[i]);
707 }
708 }
709 view->items.clear();
710 delete view;
711 }
713 const gchar *generate_marker(GSList *reprs, Geom::Rect bounds, SPDocument *document, Geom::Matrix /*transform*/, Geom::Matrix move)
714 {
715 Inkscape::XML::Document *xml_doc = document->getReprDoc();
716 Inkscape::XML::Node *defsrepr = SP_DOCUMENT_DEFS(document)->getRepr();
718 Inkscape::XML::Node *repr = xml_doc->createElement("svg:marker");
720 // Uncommenting this will make the marker fixed-size independent of stroke width.
721 // Commented out for consistency with standard markers which scale when you change
722 // stroke width:
723 //repr->setAttribute("markerUnits", "userSpaceOnUse");
725 sp_repr_set_svg_double(repr, "markerWidth", bounds.dimensions()[Geom::X]);
726 sp_repr_set_svg_double(repr, "markerHeight", bounds.dimensions()[Geom::Y]);
728 repr->setAttribute("orient", "auto");
730 defsrepr->appendChild(repr);
731 const gchar *mark_id = repr->attribute("id");
732 SPObject *mark_object = document->getObjectById(mark_id);
734 for (GSList *i = reprs; i != NULL; i = i->next) {
735 Inkscape::XML::Node *node = (Inkscape::XML::Node *)(i->data);
736 SPItem *copy = SP_ITEM(mark_object->appendChildRepr(node));
738 Geom::Matrix dup_transform;
739 if (!sp_svg_transform_read (node->attribute("transform"), &dup_transform))
740 dup_transform = Geom::identity();
741 dup_transform *= move;
743 copy->doWriteTransform(SP_OBJECT_REPR(copy), dup_transform);
744 }
746 Inkscape::GC::release(repr);
747 return mark_id;
748 }
750 /*
751 Local Variables:
752 mode:c++
753 c-file-style:"stroustrup"
754 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
755 indent-tabs-mode:nil
756 fill-column:99
757 End:
758 */
759 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :