1 #define __SP_ROOT_C__
3 /** \file
4 * SVG \<svg\> implementation.
5 */
6 /*
7 * Authors:
8 * Lauris Kaplinski <lauris@kaplinski.com>
9 *
10 * Copyright (C) 1999-2002 Lauris Kaplinski
11 * Copyright (C) 2000-2001 Ximian, Inc.
12 *
13 * Released under GNU GPL, read the file 'COPYING' for more information
14 */
16 #ifdef HAVE_CONFIG_H
17 # include "config.h"
18 #endif
20 #include <cstring>
21 #include <string>
23 #include "svg/svg.h"
24 #include "display/nr-arena-group.h"
25 #include "attributes.h"
26 #include "print.h"
27 #include "document.h"
28 #include "sp-defs.h"
29 #include "sp-root.h"
30 #include <libnr/nr-matrix-fns.h>
31 #include <libnr/nr-matrix-ops.h>
32 #include <libnr/nr-matrix-translate-ops.h>
33 #include <libnr/nr-scale-ops.h>
34 #include <libnr/nr-translate-scale-ops.h>
35 #include <xml/repr.h>
36 #include "svg/stringstream.h"
37 #include "inkscape_version.h"
39 class SPDesktop;
41 static void sp_root_class_init(SPRootClass *klass);
42 static void sp_root_init(SPRoot *root);
44 static void sp_root_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
45 static void sp_root_release(SPObject *object);
46 static void sp_root_set(SPObject *object, unsigned int key, gchar const *value);
47 static void sp_root_child_added(SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref);
48 static void sp_root_remove_child(SPObject *object, Inkscape::XML::Node *child);
49 static void sp_root_update(SPObject *object, SPCtx *ctx, guint flags);
50 static void sp_root_modified(SPObject *object, guint flags);
51 static Inkscape::XML::Node *sp_root_write(SPObject *object, Inkscape::XML::Node *repr, guint flags);
53 static NRArenaItem *sp_root_show(SPItem *item, NRArena *arena, unsigned int key, unsigned int flags);
54 static void sp_root_bbox(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags);
55 static void sp_root_print(SPItem *item, SPPrintContext *ctx);
57 static SPGroupClass *parent_class;
59 /**
60 * Returns the type info of sp_root, including its class sizes and initialization routines.
61 */
62 GType
63 sp_root_get_type(void)
64 {
65 static GType type = 0;
66 if (!type) {
67 GTypeInfo info = {
68 sizeof(SPRootClass),
69 NULL, NULL,
70 (GClassInitFunc) sp_root_class_init,
71 NULL, NULL,
72 sizeof(SPRoot),
73 16,
74 (GInstanceInitFunc) sp_root_init,
75 NULL, /* value_table */
76 };
77 type = g_type_register_static(SP_TYPE_GROUP, "SPRoot", &info, (GTypeFlags)0);
78 }
79 return type;
80 }
82 /**
83 * Initializes an SPRootClass object by setting its class and parent class objects, and registering
84 * function pointers (i.e.\ gobject-style virtual functions) for various operations.
85 */
86 static void
87 sp_root_class_init(SPRootClass *klass)
88 {
89 GObjectClass *object_class;
90 SPObjectClass *sp_object_class;
91 SPItemClass *sp_item_class;
93 object_class = G_OBJECT_CLASS(klass);
94 sp_object_class = (SPObjectClass *) klass;
95 sp_item_class = (SPItemClass *) klass;
97 parent_class = (SPGroupClass *)g_type_class_ref(SP_TYPE_GROUP);
99 sp_object_class->build = sp_root_build;
100 sp_object_class->release = sp_root_release;
101 sp_object_class->set = sp_root_set;
102 sp_object_class->child_added = sp_root_child_added;
103 sp_object_class->remove_child = sp_root_remove_child;
104 sp_object_class->update = sp_root_update;
105 sp_object_class->modified = sp_root_modified;
106 sp_object_class->write = sp_root_write;
108 sp_item_class->show = sp_root_show;
109 sp_item_class->bbox = sp_root_bbox;
110 sp_item_class->print = sp_root_print;
111 }
113 /**
114 * Initializes an SPRoot object by setting its default parameter values.
115 */
116 static void
117 sp_root_init(SPRoot *root)
118 {
119 static Inkscape::Version const zero_version(0, 0);
121 sp_version_from_string(SVG_VERSION, &root->original.svg);
122 root->version.svg = root->original.svg;
123 root->version.inkscape = root->original.inkscape =
124 root->version.sodipodi = root->original.sodipodi = zero_version;
126 root->x.unset();
127 root->y.unset();
128 root->width.unset(SVGLength::PERCENT, 1.0, 1.0);
129 root->height.unset(SVGLength::PERCENT, 1.0, 1.0);
131 /* root->viewbox.set_identity(); */
132 root->viewBox_set = FALSE;
134 root->c2p.set_identity();
136 root->defs = NULL;
137 }
139 /**
140 * Fills in the data for an SPObject from its Inkscape::XML::Node object.
141 * It fills in data such as version, x, y, width, height, etc.
142 * It then calls the object's parent class object's build function.
143 */
144 static void
145 sp_root_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
146 {
147 SPGroup *group = (SPGroup *) object;
148 SPRoot *root = (SPRoot *) object;
150 if (repr->attribute("sodipodi:docname") || repr->attribute("SP-DOCNAME")) {
151 /* so we have a nonzero initial version */
152 root->original.sodipodi.major = 0;
153 root->original.sodipodi.minor = 1;
154 }
155 sp_object_read_attr(object, "version");
156 sp_object_read_attr(object, "sodipodi:version");
157 sp_object_read_attr(object, "inkscape:version");
158 /* It is important to parse these here, so objects will have viewport build-time */
159 sp_object_read_attr(object, "x");
160 sp_object_read_attr(object, "y");
161 sp_object_read_attr(object, "width");
162 sp_object_read_attr(object, "height");
163 sp_object_read_attr(object, "viewBox");
164 sp_object_read_attr(object, "preserveAspectRatio");
166 if (((SPObjectClass *) parent_class)->build)
167 (* ((SPObjectClass *) parent_class)->build) (object, document, repr);
169 /* Search for first <defs> node */
170 for (SPObject *o = sp_object_first_child(SP_OBJECT(group)) ; o != NULL; o = SP_OBJECT_NEXT(o) ) {
171 if (SP_IS_DEFS(o)) {
172 root->defs = SP_DEFS(o);
173 break;
174 }
175 }
177 // clear transform, if any was read in - SVG does not allow transform= on <svg>
178 SP_ITEM(object)->transform = NR::identity();
179 }
181 /**
182 * This is a destructor routine for SPRoot objects. It de-references any \<def\> items and calls
183 * the parent class destructor.
184 */
185 static void
186 sp_root_release(SPObject *object)
187 {
188 SPRoot *root = (SPRoot *) object;
189 root->defs = NULL;
191 if (((SPObjectClass *) parent_class)->release)
192 ((SPObjectClass *) parent_class)->release(object);
193 }
195 /**
196 * Sets the attribute given by key for SPRoot objects to the value specified by value.
197 */
198 static void
199 sp_root_set(SPObject *object, unsigned int key, gchar const *value)
200 {
201 SPRoot *root = SP_ROOT(object);
203 switch (key) {
204 case SP_ATTR_VERSION:
205 if (!sp_version_from_string(value, &root->version.svg)) {
206 root->version.svg = root->original.svg;
207 }
208 break;
209 case SP_ATTR_SODIPODI_VERSION:
210 if (!sp_version_from_string(value, &root->version.sodipodi)) {
211 root->version.sodipodi = root->original.sodipodi;
212 }
213 case SP_ATTR_INKSCAPE_VERSION:
214 if (!sp_version_from_string(value, &root->version.inkscape)) {
215 root->version.inkscape = root->original.inkscape;
216 }
217 break;
218 case SP_ATTR_X:
219 if (!root->x.readAbsolute(value)) {
220 /* fixme: em, ex, % are probably valid, but require special treatment (Lauris) */
221 root->x.unset();
222 }
223 /* fixme: I am almost sure these do not require viewport flag (Lauris) */
224 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
225 break;
226 case SP_ATTR_Y:
227 if (!root->y.readAbsolute(value)) {
228 /* fixme: em, ex, % are probably valid, but require special treatment (Lauris) */
229 root->y.unset();
230 }
231 /* fixme: I am almost sure these do not require viewport flag (Lauris) */
232 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
233 break;
234 case SP_ATTR_WIDTH:
235 if (!root->width.readAbsolute(value) || !(root->width.computed > 0.0)) {
236 /* fixme: em, ex, % are probably valid, but require special treatment (Lauris) */
237 root->width.unset(SVGLength::PERCENT, 1.0, 1.0);
238 }
239 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
240 break;
241 case SP_ATTR_HEIGHT:
242 if (!root->height.readAbsolute(value) || !(root->height.computed > 0.0)) {
243 /* fixme: em, ex, % are probably valid, but require special treatment (Lauris) */
244 root->height.unset(SVGLength::PERCENT, 1.0, 1.0);
245 }
246 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
247 break;
248 case SP_ATTR_VIEWBOX:
249 if (value) {
250 double x, y, width, height;
251 char *eptr;
252 /* fixme: We have to take original item affine into account */
253 /* fixme: Think (Lauris) */
254 eptr = (gchar *) value;
255 x = g_ascii_strtod(eptr, &eptr);
256 while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
257 y = g_ascii_strtod(eptr, &eptr);
258 while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
259 width = g_ascii_strtod(eptr, &eptr);
260 while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
261 height = g_ascii_strtod(eptr, &eptr);
262 while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
263 if ((width > 0) && (height > 0)) {
264 /* Set viewbox */
265 root->viewBox.x0 = x;
266 root->viewBox.y0 = y;
267 root->viewBox.x1 = x + width;
268 root->viewBox.y1 = y + height;
269 root->viewBox_set = TRUE;
270 } else {
271 root->viewBox_set = FALSE;
272 }
273 } else {
274 root->viewBox_set = FALSE;
275 }
276 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
277 break;
278 case SP_ATTR_PRESERVEASPECTRATIO:
279 /* Do setup before, so we can use break to escape */
280 root->aspect_set = FALSE;
281 root->aspect_align = SP_ASPECT_XMID_YMID;
282 root->aspect_clip = SP_ASPECT_MEET;
283 object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
284 if (value) {
285 int len;
286 gchar c[256];
287 gchar const *p, *e;
288 unsigned int align, clip;
289 p = value;
290 while (*p && *p == 32) p += 1;
291 if (!*p) break;
292 e = p;
293 while (*e && *e != 32) e += 1;
294 len = e - p;
295 if (len > 8) break;
296 memcpy(c, value, len);
297 c[len] = 0;
298 /* Now the actual part */
299 if (!strcmp(c, "none")) {
300 align = SP_ASPECT_NONE;
301 } else if (!strcmp(c, "xMinYMin")) {
302 align = SP_ASPECT_XMIN_YMIN;
303 } else if (!strcmp(c, "xMidYMin")) {
304 align = SP_ASPECT_XMID_YMIN;
305 } else if (!strcmp(c, "xMaxYMin")) {
306 align = SP_ASPECT_XMAX_YMIN;
307 } else if (!strcmp(c, "xMinYMid")) {
308 align = SP_ASPECT_XMIN_YMID;
309 } else if (!strcmp(c, "xMidYMid")) {
310 align = SP_ASPECT_XMID_YMID;
311 } else if (!strcmp(c, "xMaxYMin")) {
312 align = SP_ASPECT_XMAX_YMID;
313 } else if (!strcmp(c, "xMinYMax")) {
314 align = SP_ASPECT_XMIN_YMAX;
315 } else if (!strcmp(c, "xMidYMax")) {
316 align = SP_ASPECT_XMID_YMAX;
317 } else if (!strcmp(c, "xMaxYMax")) {
318 align = SP_ASPECT_XMAX_YMAX;
319 } else {
320 break;
321 }
322 clip = SP_ASPECT_MEET;
323 while (*e && *e == 32) e += 1;
324 if (e) {
325 if (!strcmp(e, "meet")) {
326 clip = SP_ASPECT_MEET;
327 } else if (!strcmp(e, "slice")) {
328 clip = SP_ASPECT_SLICE;
329 } else {
330 break;
331 }
332 }
333 root->aspect_set = TRUE;
334 root->aspect_align = align;
335 root->aspect_clip = clip;
336 }
337 break;
338 default:
339 /* Pass the set event to the parent */
340 if (((SPObjectClass *) parent_class)->set) {
341 ((SPObjectClass *) parent_class)->set(object, key, value);
342 }
343 break;
344 }
345 }
347 /**
348 * This routine is for adding a child SVG object to an SPRoot object.
349 * The SPRoot object is taken to be an SPGroup.
350 */
351 static void
352 sp_root_child_added(SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref)
353 {
354 SPRoot *root = (SPRoot *) object;
355 SPGroup *group = (SPGroup *) object;
357 if (((SPObjectClass *) (parent_class))->child_added)
358 (* ((SPObjectClass *) (parent_class))->child_added)(object, child, ref);
360 SPObject *co = object->document->getObjectByRepr(child);
361 g_assert (co != NULL || !strcmp("comment", child->name())); // comment repr node has no object
363 if (co && SP_IS_DEFS(co)) {
364 SPObject *c;
365 /* We search for first <defs> node - it is not beautiful, but works */
366 for (c = sp_object_first_child(SP_OBJECT(group)) ; c != NULL; c = SP_OBJECT_NEXT(c) ) {
367 if (SP_IS_DEFS(c)) {
368 root->defs = SP_DEFS(c);
369 break;
370 }
371 }
372 }
373 }
375 /**
376 * Removes the given child from this SPRoot object.
377 */
378 static void sp_root_remove_child(SPObject *object, Inkscape::XML::Node *child)
379 {
380 SPRoot *root = (SPRoot *) object;
382 if ( root->defs && SP_OBJECT_REPR(root->defs) == child ) {
383 SPObject *iter;
384 /* We search for first remaining <defs> node - it is not beautiful, but works */
385 for ( iter = sp_object_first_child(object) ; iter ; iter = SP_OBJECT_NEXT(iter) ) {
386 if ( SP_IS_DEFS(iter) && (SPDefs *)iter != root->defs ) {
387 root->defs = (SPDefs *)iter;
388 break;
389 }
390 }
391 if (!iter) {
392 /* we should probably create a new <defs> here? */
393 root->defs = NULL;
394 }
395 }
397 if (((SPObjectClass *) (parent_class))->remove_child)
398 (* ((SPObjectClass *) (parent_class))->remove_child)(object, child);
399 }
401 /**
402 * This callback routine updates the SPRoot object when its attributes have been changed.
403 */
404 static void
405 sp_root_update(SPObject *object, SPCtx *ctx, guint flags)
406 {
407 SPItemView *v;
409 SPItem *item = SP_ITEM(object);
410 SPRoot *root = SP_ROOT(object);
411 SPItemCtx *ictx = (SPItemCtx *) ctx;
413 /* fixme: This will be invoked too often (Lauris) */
414 /* fixme: We should calculate only if parent viewport has changed (Lauris) */
415 /* If position is specified as percentage, calculate actual values */
416 if (root->x.unit == SVGLength::PERCENT) {
417 root->x.computed = root->x.value * (ictx->vp.x1 - ictx->vp.x0);
418 }
419 if (root->y.unit == SVGLength::PERCENT) {
420 root->y.computed = root->y.value * (ictx->vp.y1 - ictx->vp.y0);
421 }
422 if (root->width.unit == SVGLength::PERCENT) {
423 root->width.computed = root->width.value * (ictx->vp.x1 - ictx->vp.x0);
424 }
425 if (root->height.unit == SVGLength::PERCENT) {
426 root->height.computed = root->height.value * (ictx->vp.y1 - ictx->vp.y0);
427 }
429 /* Create copy of item context */
430 SPItemCtx rctx = *ictx;
432 /* Calculate child to parent transformation */
433 root->c2p.set_identity();
435 if (object->parent) {
436 /*
437 * fixme: I am not sure whether setting x and y does or does not
438 * fixme: translate the content of inner SVG.
439 * fixme: Still applying translation and setting viewport to width and
440 * fixme: height seems natural, as this makes the inner svg element
441 * fixme: self-contained. The spec is vague here.
442 */
443 root->c2p = NR::Matrix(NR::translate(root->x.computed,
444 root->y.computed));
445 }
447 if (root->viewBox_set) {
448 double x, y, width, height;
449 /* Determine actual viewbox in viewport coordinates */
450 if (root->aspect_align == SP_ASPECT_NONE) {
451 x = 0.0;
452 y = 0.0;
453 width = root->width.computed;
454 height = root->height.computed;
455 } else {
456 double scalex, scaley, scale;
457 /* Things are getting interesting */
458 scalex = root->width.computed / (root->viewBox.x1 - root->viewBox.x0);
459 scaley = root->height.computed / (root->viewBox.y1 - root->viewBox.y0);
460 scale = (root->aspect_clip == SP_ASPECT_MEET) ? MIN(scalex, scaley) : MAX(scalex, scaley);
461 width = (root->viewBox.x1 - root->viewBox.x0) * scale;
462 height = (root->viewBox.y1 - root->viewBox.y0) * scale;
463 /* Now place viewbox to requested position */
464 /* todo: Use an array lookup to find the 0.0/0.5/1.0 coefficients,
465 as is done for dialogs/align.cpp. */
466 switch (root->aspect_align) {
467 case SP_ASPECT_XMIN_YMIN:
468 x = 0.0;
469 y = 0.0;
470 break;
471 case SP_ASPECT_XMID_YMIN:
472 x = 0.5 * (root->width.computed - width);
473 y = 0.0;
474 break;
475 case SP_ASPECT_XMAX_YMIN:
476 x = 1.0 * (root->width.computed - width);
477 y = 0.0;
478 break;
479 case SP_ASPECT_XMIN_YMID:
480 x = 0.0;
481 y = 0.5 * (root->height.computed - height);
482 break;
483 case SP_ASPECT_XMID_YMID:
484 x = 0.5 * (root->width.computed - width);
485 y = 0.5 * (root->height.computed - height);
486 break;
487 case SP_ASPECT_XMAX_YMID:
488 x = 1.0 * (root->width.computed - width);
489 y = 0.5 * (root->height.computed - height);
490 break;
491 case SP_ASPECT_XMIN_YMAX:
492 x = 0.0;
493 y = 1.0 * (root->height.computed - height);
494 break;
495 case SP_ASPECT_XMID_YMAX:
496 x = 0.5 * (root->width.computed - width);
497 y = 1.0 * (root->height.computed - height);
498 break;
499 case SP_ASPECT_XMAX_YMAX:
500 x = 1.0 * (root->width.computed - width);
501 y = 1.0 * (root->height.computed - height);
502 break;
503 default:
504 x = 0.0;
505 y = 0.0;
506 break;
507 }
508 }
510 /* Compose additional transformation from scale and position */
511 NR::Point const viewBox_min(root->viewBox.x0,
512 root->viewBox.y0);
513 NR::Point const viewBox_max(root->viewBox.x1,
514 root->viewBox.y1);
515 NR::scale const viewBox_length( viewBox_max - viewBox_min );
516 NR::scale const new_length(width, height);
518 /* Append viewbox transformation */
519 /* TODO: The below looks suspicious to me (pjrm): I wonder whether the RHS
520 expression should have c2p at the beginning rather than at the end. Test it. */
521 root->c2p = NR::translate(-viewBox_min) * ( new_length / viewBox_length ) * NR::translate(x, y) * root->c2p;
522 }
524 rctx.i2doc = root->c2p * rctx.i2doc;
526 /* Initialize child viewport */
527 if (root->viewBox_set) {
528 rctx.vp.x0 = root->viewBox.x0;
529 rctx.vp.y0 = root->viewBox.y0;
530 rctx.vp.x1 = root->viewBox.x1;
531 rctx.vp.y1 = root->viewBox.y1;
532 } else {
533 /* fixme: I wonder whether this logic is correct (Lauris) */
534 if (object->parent) {
535 rctx.vp.x0 = root->x.computed;
536 rctx.vp.y0 = root->y.computed;
537 } else {
538 rctx.vp.x0 = 0.0;
539 rctx.vp.y0 = 0.0;
540 }
541 rctx.vp.x1 = root->width.computed;
542 rctx.vp.y1 = root->height.computed;
543 }
545 rctx.i2vp = NR::identity();
547 /* And invoke parent method */
548 if (((SPObjectClass *) (parent_class))->update)
549 ((SPObjectClass *) (parent_class))->update(object, (SPCtx *) &rctx, flags);
551 /* As last step set additional transform of arena group */
552 for (v = item->display; v != NULL; v = v->next) {
553 nr_arena_group_set_child_transform(NR_ARENA_GROUP(v->arenaitem), root->c2p);
554 }
555 }
557 /**
558 * Calls the <tt>modified</tt> routine of the SPRoot object's parent class.
559 * Also, if the viewport has been modified, it sets the document size to the new
560 * height and width.
561 */
562 static void
563 sp_root_modified(SPObject *object, guint flags)
564 {
565 SPRoot *root = SP_ROOT(object);
567 if (((SPObjectClass *) (parent_class))->modified)
568 (* ((SPObjectClass *) (parent_class))->modified)(object, flags);
570 /* fixme: (Lauris) */
571 if (!object->parent && (flags & SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
572 sp_document_resized_signal_emit (SP_OBJECT_DOCUMENT(root), root->width.computed, root->height.computed);
573 }
574 }
576 /**
577 * Writes the object into the repr object, then calls the parent's write routine.
578 */
579 static Inkscape::XML::Node *
580 sp_root_write(SPObject *object, Inkscape::XML::Node *repr, guint flags)
581 {
582 SPRoot *root = SP_ROOT(object);
584 if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
585 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_OBJECT_DOCUMENT(object));
586 repr = xml_doc->createElement("svg:svg");
587 }
589 if (flags & SP_OBJECT_WRITE_EXT) {
590 repr->setAttribute("sodipodi:version", SODIPODI_VERSION);
591 repr->setAttribute("inkscape:version", INKSCAPE_VERSION);
592 }
594 repr->setAttribute("version", SVG_VERSION);
596 if (fabs(root->x.computed) > 1e-9)
597 sp_repr_set_svg_double(repr, "x", root->x.computed);
598 if (fabs(root->y.computed) > 1e-9)
599 sp_repr_set_svg_double(repr, "y", root->y.computed);
601 /* Unlike all other SPObject, here we want to preserve absolute units too (and only here,
602 * according to the recommendation in http://www.w3.org/TR/SVG11/coords.html#Units).
603 */
604 repr->setAttribute("width", sp_svg_length_write_with_units(root->width).c_str());
605 repr->setAttribute("height", sp_svg_length_write_with_units(root->height).c_str());
607 if (root->viewBox_set) {
608 Inkscape::SVGOStringStream os;
609 os << root->viewBox.x0 << " " << root->viewBox.y0 << " " << root->viewBox.x1 - root->viewBox.x0 << " " << root->viewBox.y1 - root->viewBox.y0;
610 repr->setAttribute("viewBox", os.str().c_str());
611 }
613 if (((SPObjectClass *) (parent_class))->write)
614 ((SPObjectClass *) (parent_class))->write(object, repr, flags);
616 return repr;
617 }
619 /**
620 * Displays the SPRoot item on the NRArena.
621 */
622 static NRArenaItem *
623 sp_root_show(SPItem *item, NRArena *arena, unsigned int key, unsigned int flags)
624 {
625 SPRoot *root = SP_ROOT(item);
627 NRArenaItem *ai;
628 if (((SPItemClass *) (parent_class))->show) {
629 ai = ((SPItemClass *) (parent_class))->show(item, arena, key, flags);
630 if (ai) {
631 nr_arena_group_set_child_transform(NR_ARENA_GROUP(ai), root->c2p);
632 }
633 } else {
634 ai = NULL;
635 }
637 return ai;
638 }
640 /**
641 * Virtual bbox callback.
642 */
643 static void
644 sp_root_bbox(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags)
645 {
646 SPRoot const *root = SP_ROOT(item);
648 if (((SPItemClass *) (parent_class))->bbox) {
649 NR::Matrix const product( root->c2p * transform );
650 ((SPItemClass *) (parent_class))->bbox(item, bbox,
651 product,
652 flags);
653 }
654 }
656 /**
657 * Virtual print callback.
658 */
659 static void
660 sp_root_print(SPItem *item, SPPrintContext *ctx)
661 {
662 SPRoot *root = SP_ROOT(item);
664 sp_print_bind(ctx, root->c2p, 1.0);
666 if (((SPItemClass *) (parent_class))->print) {
667 ((SPItemClass *) (parent_class))->print(item, ctx);
668 }
670 sp_print_release(ctx);
671 }
674 /*
675 Local Variables:
676 mode:c++
677 c-file-style:"stroustrup"
678 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
679 indent-tabs-mode:nil
680 fill-column:99
681 End:
682 */
683 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :