2
* Base class for shapes, including <path> element
5
* Lauris Kaplinski <lauris@kaplinski.com>
7
* Copyright (C) 1999-2002 Lauris Kaplinski
8
* Copyright (C) 2000-2001 Ximian, Inc.
9
* Copyright (C) 2004 John Cliff
10
* Copyright (C) 2007-2008 Johan Engelen
12
* Released under GNU GPL, read the file 'COPYING' for more information
19
#include <libnr/nr-matrix-fns.h>
20
#include <libnr/nr-matrix-ops.h>
21
#include <libnr/nr-matrix-translate-ops.h>
22
#include <libnr/nr-scale-matrix-ops.h>
23
#include <2geom/rect.h>
24
#include <2geom/transforms.h>
25
#include <2geom/pathvector.h>
26
#include <2geom/path-intersection.h>
27
#include "helper/geom.h"
28
#include "helper/geom-nodetype.h"
30
#include <sigc++/functors/ptr_fun.h>
31
#include <sigc++/adaptors/bind.h>
34
#include "display/nr-arena-shape.h"
35
#include "display/curve.h"
41
#include "preferences.h"
42
#include "attributes.h"
44
#include "live_effects/lpeobject.h"
46
#include "extract-uri.h"
47
#include "uri-references.h"
48
#include "bad-uri-exception.h"
51
#include "util/mathfns.h" // for triangle_area()
53
#define noSHAPE_VERBOSE
55
static void sp_shape_class_init (SPShapeClass *klass);
56
static void sp_shape_init (SPShape *shape);
57
static void sp_shape_finalize (GObject *object);
59
static void sp_shape_build (SPObject * object, SPDocument * document, Inkscape::XML::Node * repr);
60
static void sp_shape_release (SPObject *object);
62
static void sp_shape_set(SPObject *object, unsigned key, gchar const *value);
63
static void sp_shape_update (SPObject *object, SPCtx *ctx, unsigned int flags);
64
static void sp_shape_modified (SPObject *object, unsigned int flags);
65
static Inkscape::XML::Node *sp_shape_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
67
static void sp_shape_bbox(SPItem const *item, NRRect *bbox, Geom::Matrix const &transform, unsigned const flags);
68
void sp_shape_print (SPItem * item, SPPrintContext * ctx);
69
static NRArenaItem *sp_shape_show (SPItem *item, NRArena *arena, unsigned int key, unsigned int flags);
70
static void sp_shape_hide (SPItem *item, unsigned int key);
71
static void sp_shape_snappoints (SPItem const *item, bool const target, SnapPointsWithType &p, Inkscape::SnapPreferences const *snapprefs);
73
static void sp_shape_update_marker_view (SPShape *shape, NRArenaItem *ai);
75
static SPLPEItemClass *parent_class;
78
* Registers the SPShape class with Gdk and returns its type number.
81
sp_shape_get_type (void)
83
static GType type = 0;
86
sizeof (SPShapeClass),
88
(GClassInitFunc) sp_shape_class_init,
92
(GInstanceInitFunc) sp_shape_init,
93
NULL, /* value_table */
95
type = g_type_register_static (SP_TYPE_LPE_ITEM, "SPShape", &info, (GTypeFlags)0);
101
* Initializes a SPShapeClass object. Establishes the function pointers to the class'
102
* member routines in the class vtable, and sets pointers to parent classes.
105
sp_shape_class_init (SPShapeClass *klass)
107
GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
108
SPObjectClass *sp_object_class = SP_OBJECT_CLASS(klass);
109
SPItemClass * item_class = SP_ITEM_CLASS(klass);
110
SPLPEItemClass * lpe_item_class = SP_LPE_ITEM_CLASS(klass);
112
parent_class = (SPLPEItemClass *)g_type_class_peek_parent (klass);
114
gobject_class->finalize = sp_shape_finalize;
116
sp_object_class->build = sp_shape_build;
117
sp_object_class->release = sp_shape_release;
118
sp_object_class->set = sp_shape_set;
119
sp_object_class->update = sp_shape_update;
120
sp_object_class->modified = sp_shape_modified;
121
sp_object_class->write = sp_shape_write;
123
item_class->bbox = sp_shape_bbox;
124
item_class->print = sp_shape_print;
125
item_class->show = sp_shape_show;
126
item_class->hide = sp_shape_hide;
127
item_class->snappoints = sp_shape_snappoints;
128
lpe_item_class->update_patheffect = NULL;
130
klass->set_shape = NULL;
134
* Initializes an SPShape object.
137
sp_shape_init (SPShape *shape)
139
for ( int i = 0 ; i < SP_MARKER_LOC_QTY ; i++ ) {
140
new (&shape->release_connect[i]) sigc::connection();
141
new (&shape->modified_connect[i]) sigc::connection();
142
shape->marker[i] = NULL;
148
sp_shape_finalize (GObject *object)
150
SPShape *shape=(SPShape *)object;
152
for ( int i = 0 ; i < SP_MARKER_LOC_QTY ; i++ ) {
153
shape->release_connect[i].disconnect();
154
shape->release_connect[i].~connection();
155
shape->modified_connect[i].disconnect();
156
shape->modified_connect[i].~connection();
159
if (((GObjectClass *) (parent_class))->finalize) {
160
(* ((GObjectClass *) (parent_class))->finalize)(object);
165
* Virtual build callback for SPMarker.
167
* This is to be invoked immediately after creation of an SPShape.
169
* \see sp_object_build()
172
sp_shape_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
174
if (((SPObjectClass *) (parent_class))->build) {
175
(*((SPObjectClass *) (parent_class))->build) (object, document, repr);
178
for (int i = 0 ; i < SP_MARKER_LOC_QTY ; i++) {
179
sp_shape_set_marker (object, i, object->style->marker[i].value);
184
* Removes, releases and unrefs all children of object
186
* This is the inverse of sp_shape_build(). It must be invoked as soon
187
* as the shape is removed from the tree, even if it is still referenced
188
* by other objects. This routine also disconnects/unrefs markers and
189
* curves attached to it.
191
* \see sp_object_release()
194
sp_shape_release (SPObject *object)
201
item = (SPItem *) object;
202
shape = (SPShape *) object;
204
for (i = 0; i < SP_MARKER_LOC_QTY; i++) {
205
if (shape->marker[i]) {
206
for (v = item->display; v != NULL; v = v->next) {
207
sp_marker_hide ((SPMarker *) shape->marker[i], NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i);
209
shape->release_connect[i].disconnect();
210
shape->modified_connect[i].disconnect();
211
shape->marker[i] = sp_object_hunref (shape->marker[i], object);
215
shape->curve = shape->curve->unref();
218
if (((SPObjectClass *) parent_class)->release) {
219
((SPObjectClass *) parent_class)->release (object);
226
sp_shape_set(SPObject *object, unsigned int key, gchar const *value)
228
if (((SPObjectClass *) parent_class)->set) {
229
((SPObjectClass *) parent_class)->set(object, key, value);
233
static Inkscape::XML::Node *
234
sp_shape_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags)
236
if (((SPObjectClass *)(parent_class))->write) {
237
((SPObjectClass *)(parent_class))->write(object, doc, repr, flags);
244
* Updates the shape when its attributes have changed. Also establishes
245
* marker objects to match the style settings.
248
sp_shape_update (SPObject *object, SPCtx *ctx, unsigned int flags)
250
SPItem *item = (SPItem *) object;
251
SPShape *shape = (SPShape *) object;
253
if (((SPObjectClass *) (parent_class))->update) {
254
(* ((SPObjectClass *) (parent_class))->update) (object, ctx, flags);
257
/* This stanza checks that an object's marker style agrees with
258
* the marker objects it has allocated. sp_shape_set_marker ensures
259
* that the appropriate marker objects are present (or absent) to
262
for (int i = 0 ; i < SP_MARKER_LOC_QTY ; i++) {
263
sp_shape_set_marker (object, i, object->style->marker[i].value);
266
if (flags & (SP_OBJECT_STYLE_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
268
style = SP_OBJECT_STYLE (object);
269
if (style->stroke_width.unit == SP_CSS_UNIT_PERCENT) {
270
SPItemCtx *ictx = (SPItemCtx *) ctx;
271
double const aw = 1.0 / NR::expansion(ictx->i2vp);
272
style->stroke_width.computed = style->stroke_width.value * aw;
273
for (SPItemView *v = ((SPItem *) (shape))->display; v != NULL; v = v->next) {
274
nr_arena_shape_set_style ((NRArenaShape *) v->arenaitem, style);
279
if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_PARENT_MODIFIED_FLAG)) {
280
/* This is suboptimal, because changing parent style schedules recalculation */
281
/* But on the other hand - how can we know that parent does not tie style and transform */
282
Geom::OptRect paintbox = SP_ITEM(object)->getBounds(Geom::identity(), SPItem::GEOMETRIC_BBOX);
283
for (SPItemView *v = SP_ITEM (shape)->display; v != NULL; v = v->next) {
284
NRArenaShape * const s = NR_ARENA_SHAPE(v->arenaitem);
285
if (flags & SP_OBJECT_MODIFIED_FLAG) {
286
nr_arena_shape_set_path(s, shape->curve, (flags & SP_OBJECT_USER_MODIFIED_FLAG_B));
289
s->setPaintBox(*paintbox);
294
if (sp_shape_has_markers (shape)) {
295
/* Dimension marker views */
296
for (SPItemView *v = item->display; v != NULL; v = v->next) {
297
if (!v->arenaitem->key) {
298
NR_ARENA_ITEM_SET_KEY (v->arenaitem, sp_item_display_key_new (SP_MARKER_LOC_QTY));
300
for (int i = 0 ; i < SP_MARKER_LOC_QTY ; i++) {
301
if (shape->marker[i]) {
302
sp_marker_show_dimension ((SPMarker *) shape->marker[i],
303
NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i,
304
sp_shape_number_of_markers (shape, i));
309
/* Update marker views */
310
for (SPItemView *v = item->display; v != NULL; v = v->next) {
311
sp_shape_update_marker_view (shape, v->arenaitem);
317
* Calculate the transform required to get a marker's path object in the
318
* right place for particular path segment on a shape.
320
* \see sp_shape_marker_update_marker_view.
323
* The axes of the temporary new user coordinate system are aligned according to the orient attribute on the 'marker'
324
* element and the slope of the curve at the given vertex. (Note: if there is a discontinuity at a vertex, the slope
325
* is the average of the slopes of the two segments of the curve that join at the given vertex. If a slope cannot be
326
* determined, the slope is assumed to be zero.)
328
* Reference: http://www.w3.org/TR/SVG11/painting.html#MarkerElement, the `orient' attribute.
329
* Reference for behaviour of zero-length segments:
330
* http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes
333
sp_shape_marker_get_transform(Geom::Curve const & c1, Geom::Curve const & c2)
335
Geom::Point p = c1.pointAt(1);
336
Geom::Curve * c1_reverse = c1.reverse();
337
Geom::Point tang1 = - c1_reverse->unitTangentAt(0);
339
Geom::Point tang2 = c2.unitTangentAt(0);
341
double const angle1 = Geom::atan2(tang1);
342
double const angle2 = Geom::atan2(tang2);
345
ret_angle = .5 * (angle1 + angle2);
347
if ( fabs( angle2 - angle1 ) > M_PI ) {
348
/* ret_angle is in the middle of the larger of the two sectors between angle1 and
349
* angle2, so flip it by 180degrees to force it to the middle of the smaller sector.
351
* (Imagine a circle with rays drawn at angle1 and angle2 from the centre of the
352
* circle. Those two rays divide the circle into two sectors.)
357
return Geom::Rotate(ret_angle) * Geom::Translate(p);
360
sp_shape_marker_get_transform_at_start(Geom::Curve const & c)
362
Geom::Point p = c.pointAt(0);
363
Geom::Matrix ret = Geom::Translate(p);
365
if ( !c.isDegenerate() ) {
366
Geom::Point tang = c.unitTangentAt(0);
367
double const angle = Geom::atan2(tang);
368
ret = Geom::Rotate(angle) * Geom::Translate(p);
370
/* FIXME: the svg spec says to search for a better alternative than zero angle directionality:
371
* http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes */
377
sp_shape_marker_get_transform_at_end(Geom::Curve const & c)
379
Geom::Point p = c.pointAt(1);
380
Geom::Matrix ret = Geom::Translate(p);
382
if ( !c.isDegenerate() ) {
383
Geom::Curve * c_reverse = c.reverse();
384
Geom::Point tang = - c_reverse->unitTangentAt(0);
386
double const angle = Geom::atan2(tang);
387
ret = Geom::Rotate(angle) * Geom::Translate(p);
389
/* FIXME: the svg spec says to search for a better alternative than zero angle directionality:
390
* http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes */
397
* Updates the instances (views) of a given marker in a shape.
398
* Marker views have to be scaled already. The transformation
399
* is retrieved and then shown by calling sp_marker_show_instance.
401
* @todo figure out what to do when both 'marker' and for instance 'marker-end' are set.
404
sp_shape_update_marker_view (SPShape *shape, NRArenaItem *ai)
406
SPStyle *style = ((SPObject *) shape)->style;
408
// position arguments to sp_marker_show_instance, basically counts the amount of markers.
409
int counter[4] = {0};
411
Geom::PathVector const & pathv = shape->curve->get_pathvector();
412
for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
414
Geom::Matrix const m (sp_shape_marker_get_transform_at_start(path_it->front()));
415
for (int i = 0; i < 2; i++) { // SP_MARKER_LOC and SP_MARKER_LOC_START
416
if ( shape->marker[i] ) {
417
sp_marker_show_instance ((SPMarker* ) shape->marker[i], ai,
418
NR_ARENA_ITEM_GET_KEY(ai) + i, counter[i], m,
419
style->stroke_width.computed);
425
if ( (shape->marker[SP_MARKER_LOC_MID] || shape->marker[SP_MARKER_LOC]) && (path_it->size_default() > 1) ) {
426
Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
427
Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
428
while (curve_it2 != path_it->end_default())
430
/* Put marker between curve_it1 and curve_it2.
431
* Loop to end_default (so including closing segment), because when a path is closed,
432
* there should be a midpoint marker between last segment and closing straight line segment
434
Geom::Matrix const m (sp_shape_marker_get_transform(*curve_it1, *curve_it2));
435
for (int i = 0; i < 3; i += 2) { // SP_MARKER_LOC and SP_MARKER_LOC_MID
436
if (shape->marker[i]) {
437
sp_marker_show_instance ((SPMarker* ) shape->marker[i], ai,
438
NR_ARENA_ITEM_GET_KEY(ai) + i, counter[i], m,
439
style->stroke_width.computed);
450
if ( shape->marker[SP_MARKER_LOC_END] || shape->marker[SP_MARKER_LOC] ) {
451
/* Get reference to last curve in the path.
452
* For moveto-only path, this returns the "closing line segment". */
453
unsigned int index = path_it->size_default();
457
Geom::Curve const &lastcurve = (*path_it)[index];
458
Geom::Matrix const m = sp_shape_marker_get_transform_at_end(lastcurve);
460
for (int i = 0; i < 4; i += 3) { // SP_MARKER_LOC and SP_MARKER_LOC_END
461
if (shape->marker[i]) {
462
sp_marker_show_instance ((SPMarker* ) shape->marker[i], ai,
463
NR_ARENA_ITEM_GET_KEY(ai) + i, counter[i], m,
464
style->stroke_width.computed);
473
* Sets modified flag for all sub-item views.
476
sp_shape_modified (SPObject *object, unsigned int flags)
478
SPShape *shape = SP_SHAPE (object);
480
if (((SPObjectClass *) (parent_class))->modified) {
481
(* ((SPObjectClass *) (parent_class))->modified) (object, flags);
484
if (flags & SP_OBJECT_STYLE_MODIFIED_FLAG) {
485
for (SPItemView *v = SP_ITEM (shape)->display; v != NULL; v = v->next) {
486
nr_arena_shape_set_style (NR_ARENA_SHAPE (v->arenaitem), object->style);
492
* Calculates the bounding box for item, storing it into bbox.
493
* This also includes the bounding boxes of any markers included in the shape.
495
static void sp_shape_bbox(SPItem const *item, NRRect *bbox, Geom::Matrix const &transform, unsigned const flags)
497
SPShape const *shape = SP_SHAPE (item);
499
Geom::OptRect geombbox = bounds_exact_transformed(shape->curve->get_pathvector(), transform);
502
cbbox.x0 = (*geombbox)[0][0];
503
cbbox.y0 = (*geombbox)[1][0];
504
cbbox.x1 = (*geombbox)[0][1];
505
cbbox.y1 = (*geombbox)[1][1];
507
if ((SPItem::BBoxType) flags != SPItem::GEOMETRIC_BBOX) {
509
SPStyle* style=SP_OBJECT_STYLE (item);
510
if (!style->stroke.isNone()) {
511
double const scale = transform.descrim();
512
if ( fabs(style->stroke_width.computed * scale) > 0.01 ) { // sinon c'est 0=oon veut pas de bord
513
double const width = MAX(0.125, style->stroke_width.computed * scale);
514
if ( fabs(cbbox.x1-cbbox.x0) > -0.00001 && fabs(cbbox.y1-cbbox.y0) > -0.00001 ) {
523
// Union with bboxes of the markers, if any
524
if (sp_shape_has_markers (shape)) {
525
/* TODO: make code prettier: lots of variables can be taken out of the loop! */
526
Geom::PathVector const & pathv = shape->curve->get_pathvector();
527
for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
528
for (unsigned i = 0; i < 2; i++) { // SP_MARKER_LOC and SP_MARKER_LOC_START
529
if ( shape->marker[i] ) {
530
SPMarker* marker = SP_MARKER (shape->marker[i]);
531
SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (marker));
534
Geom::Matrix tr(sp_shape_marker_get_transform_at_start(path_it->front()));
535
if (!marker->orient_auto) {
536
Geom::Point transl = tr.translation();
537
tr = Geom::Rotate::from_degrees(marker->orient) * Geom::Translate(transl);
539
if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
540
tr = Geom::Scale(style->stroke_width.computed) * tr;
543
// total marker transform
544
tr = marker_item->transform * marker->c2p * tr * transform;
546
// get bbox of the marker with that transform
548
sp_item_invoke_bbox (marker_item, &marker_bbox, from_2geom(tr), true);
549
// union it with the shape bbox
550
nr_rect_d_union (&cbbox, &cbbox, &marker_bbox);
555
for (unsigned i = 0; i < 3; i += 2) { // SP_MARKER_LOC and SP_MARKER_LOC_MID
556
if ( shape->marker[i] && (path_it->size_default() > 1) ) {
557
Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
558
Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
559
while (curve_it2 != path_it->end_default())
561
/* Put marker between curve_it1 and curve_it2.
562
* Loop to end_default (so including closing segment), because when a path is closed,
563
* there should be a midpoint marker between last segment and closing straight line segment */
565
SPMarker* marker = SP_MARKER (shape->marker[i]);
566
SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (marker));
569
Geom::Matrix tr(sp_shape_marker_get_transform(*curve_it1, *curve_it2));
570
if (!marker->orient_auto) {
571
Geom::Point transl = tr.translation();
572
tr = Geom::Rotate::from_degrees(marker->orient) * Geom::Translate(transl);
574
if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
575
tr = Geom::Scale(style->stroke_width.computed) * tr;
578
// total marker transform
579
tr = marker_item->transform * marker->c2p * tr * transform;
581
// get bbox of the marker with that transform
583
sp_item_invoke_bbox (marker_item, &marker_bbox, from_2geom(tr), true);
584
// union it with the shape bbox
585
nr_rect_d_union (&cbbox, &cbbox, &marker_bbox);
594
for (unsigned i = 0; i < 4; i += 3) { // SP_MARKER_LOC and SP_MARKER_LOC_END
595
if ( shape->marker[i] ) {
596
SPMarker* marker = SP_MARKER (shape->marker[i]);
597
SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (marker));
600
/* Get reference to last curve in the path.
601
* For moveto-only path, this returns the "closing line segment". */
602
unsigned int index = path_it->size_default();
606
Geom::Curve const &lastcurve = (*path_it)[index];
608
Geom::Matrix tr = sp_shape_marker_get_transform_at_end(lastcurve);
609
if (!marker->orient_auto) {
610
Geom::Point transl = tr.translation();
611
tr = Geom::Rotate::from_degrees(marker->orient) * Geom::Translate(transl);
613
if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
614
tr = Geom::Scale(style->stroke_width.computed) * tr;
617
// total marker transform
618
tr = marker_item->transform * marker->c2p * tr * transform;
620
// get bbox of the marker with that transform
622
sp_item_invoke_bbox (marker_item, &marker_bbox, tr, true);
623
// union it with the shape bbox
624
nr_rect_d_union (&cbbox, &cbbox, &marker_bbox);
632
// copy our bbox to the variable we're given
639
sp_shape_print_invoke_marker_printing(SPObject* obj, Geom::Matrix tr, SPStyle* style, SPPrintContext *ctx) {
640
SPMarker *marker = SP_MARKER(obj);
641
if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
642
tr = Geom::Scale(style->stroke_width.computed) * tr;
645
SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (marker));
646
tr = marker_item->transform * marker->c2p * tr;
648
Geom::Matrix old_tr = marker_item->transform;
649
marker_item->transform = tr;
650
sp_item_invoke_print (marker_item, ctx);
651
marker_item->transform = old_tr;
654
* Prepares shape for printing. Handles printing of comments for printing
655
* debugging, sizes the item to fit into the document width/height,
656
* applies print fill/stroke, sets transforms for markers, and adds
660
sp_shape_print (SPItem *item, SPPrintContext *ctx)
662
NRRect pbox, dbox, bbox;
664
SPShape *shape = SP_SHAPE(item);
666
if (!shape->curve) return;
668
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
669
gint add_comments = prefs->getBool("/printing/debug/add-label-comments");
671
gchar * comment = g_strdup_printf("begin '%s'",
672
SP_OBJECT(item)->defaultLabel());
673
sp_print_comment(ctx, comment);
677
/* fixme: Think (Lauris) */
678
sp_item_invoke_bbox(item, &pbox, Geom::identity(), TRUE);
681
dbox.x1 = sp_document_width (SP_OBJECT_DOCUMENT (item));
682
dbox.y1 = sp_document_height (SP_OBJECT_DOCUMENT (item));
683
sp_item_bbox_desktop (item, &bbox);
684
Geom::Matrix const i2d(sp_item_i2d_affine(item));
686
SPStyle* style = SP_OBJECT_STYLE (item);
688
if (!style->fill.isNone()) {
689
sp_print_fill (ctx, shape->curve->get_pathvector(), &i2d, style, &pbox, &dbox, &bbox);
692
if (!style->stroke.isNone()) {
693
sp_print_stroke (ctx, shape->curve->get_pathvector(), &i2d, style, &pbox, &dbox, &bbox);
696
/* TODO: make code prettier: lots of variables can be taken out of the loop! */
697
Geom::PathVector const & pathv = shape->curve->get_pathvector();
698
for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
699
if ( shape->marker[SP_MARKER_LOC_START] || shape->marker[SP_MARKER_LOC]) {
700
Geom::Matrix tr(sp_shape_marker_get_transform_at_start(path_it->front()));
701
if (shape->marker[SP_MARKER_LOC_START]) {
702
sp_shape_print_invoke_marker_printing(shape->marker[SP_MARKER_LOC_START], tr, style, ctx);
704
if (shape->marker[SP_MARKER_LOC]) {
705
sp_shape_print_invoke_marker_printing(shape->marker[SP_MARKER_LOC], tr, style, ctx);
709
if ( (shape->marker[SP_MARKER_LOC_MID] || shape->marker[SP_MARKER_LOC]) && (path_it->size_default() > 1) ) {
710
Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
711
Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
712
while (curve_it2 != path_it->end_default())
714
/* Put marker between curve_it1 and curve_it2.
715
* Loop to end_default (so including closing segment), because when a path is closed,
716
* there should be a midpoint marker between last segment and closing straight line segment */
717
Geom::Matrix tr(sp_shape_marker_get_transform(*curve_it1, *curve_it2));
719
if (shape->marker[SP_MARKER_LOC_MID]) {
720
sp_shape_print_invoke_marker_printing(shape->marker[SP_MARKER_LOC_MID], tr, style, ctx);
722
if (shape->marker[SP_MARKER_LOC]) {
723
sp_shape_print_invoke_marker_printing(shape->marker[SP_MARKER_LOC], tr, style, ctx);
731
if ( shape->marker[SP_MARKER_LOC_END] || shape->marker[SP_MARKER_LOC]) {
732
/* Get reference to last curve in the path.
733
* For moveto-only path, this returns the "closing line segment". */
734
unsigned int index = path_it->size_default();
738
Geom::Curve const &lastcurve = (*path_it)[index];
740
Geom::Matrix tr = sp_shape_marker_get_transform_at_end(lastcurve);
742
if (shape->marker[SP_MARKER_LOC_END]) {
743
sp_shape_print_invoke_marker_printing(shape->marker[SP_MARKER_LOC_END], tr, style, ctx);
745
if (shape->marker[SP_MARKER_LOC]) {
746
sp_shape_print_invoke_marker_printing(shape->marker[SP_MARKER_LOC], tr, style, ctx);
752
gchar * comment = g_strdup_printf("end '%s'",
753
SP_OBJECT(item)->defaultLabel());
754
sp_print_comment(ctx, comment);
760
* Sets style, path, and paintbox. Updates marker views, including dimensions.
763
sp_shape_show (SPItem *item, NRArena *arena, unsigned int /*key*/, unsigned int /*flags*/)
765
SPObject *object = SP_OBJECT(item);
766
SPShape *shape = SP_SHAPE(item);
768
NRArenaItem *arenaitem = NRArenaShape::create(arena);
769
NRArenaShape * const s = NR_ARENA_SHAPE(arenaitem);
770
nr_arena_shape_set_style(s, object->style);
771
nr_arena_shape_set_path(s, shape->curve, false);
772
Geom::OptRect paintbox = item->getBounds(Geom::identity());
774
s->setPaintBox(*paintbox);
777
/* This stanza checks that an object's marker style agrees with
778
* the marker objects it has allocated. sp_shape_set_marker ensures
779
* that the appropriate marker objects are present (or absent) to
782
for (int i = 0 ; i < SP_MARKER_LOC_QTY ; i++) {
783
sp_shape_set_marker (object, i, object->style->marker[i].value);
786
if (sp_shape_has_markers (shape)) {
788
/* provide key and dimension the marker views */
789
if (!arenaitem->key) {
790
NR_ARENA_ITEM_SET_KEY (arenaitem, sp_item_display_key_new (SP_MARKER_LOC_QTY));
793
for (int i = 0; i < SP_MARKER_LOC_QTY; i++) {
794
if (shape->marker[i]) {
795
sp_marker_show_dimension ((SPMarker *) shape->marker[i],
796
NR_ARENA_ITEM_GET_KEY (arenaitem) + i,
797
sp_shape_number_of_markers (shape, i));
801
/* Update marker views */
802
sp_shape_update_marker_view (shape, arenaitem);
809
* Hides/removes marker views from the shape.
812
sp_shape_hide (SPItem *item, unsigned int key)
818
shape = (SPShape *) item;
820
for (i=0; i<SP_MARKER_LOC_QTY; i++) {
821
if (shape->marker[i]) {
822
for (v = item->display; v != NULL; v = v->next) {
824
sp_marker_hide ((SPMarker *) shape->marker[i],
825
NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i);
831
if (((SPItemClass *) parent_class)->hide) {
832
((SPItemClass *) parent_class)->hide (item, key);
837
* \param shape Shape.
838
* \return TRUE if the shape has any markers, or FALSE if not.
841
sp_shape_has_markers (SPShape const *shape)
843
/* Note, we're ignoring 'marker' settings, which technically should apply for
844
all three settings. This should be fixed later such that if 'marker' is
845
specified, then all three should appear. */
849
(shape->marker[SP_MARKER_LOC] ||
850
shape->marker[SP_MARKER_LOC_START] ||
851
shape->marker[SP_MARKER_LOC_MID] ||
852
shape->marker[SP_MARKER_LOC_END])
858
* \param shape Shape.
859
* \param type Marker type (e.g. SP_MARKER_LOC_START)
860
* \return Number of markers that the shape has of this type.
863
sp_shape_number_of_markers (SPShape *shape, int type)
865
Geom::PathVector const & pathv = shape->curve->get_pathvector();
870
if ( shape->marker[SP_MARKER_LOC] ) {
871
guint n = 2*pathv.size();
872
for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
873
n += path_it->size();
874
n += path_it->closed() ? 1 : 0;
881
case SP_MARKER_LOC_START:
882
return shape->marker[SP_MARKER_LOC_START] ? pathv.size() : 0;
884
case SP_MARKER_LOC_MID:
886
if ( shape->marker[SP_MARKER_LOC_MID] ) {
888
for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
889
n += path_it->size();
890
n += path_it->closed() ? 1 : 0;
898
case SP_MARKER_LOC_END:
900
return shape->marker[SP_MARKER_LOC_END] ? pathv.size() : 0;
909
* Checks if the given marker is used in the shape, and if so, it
910
* releases it by calling sp_marker_hide. Also detaches signals
911
* and unrefs the marker from the shape.
914
sp_shape_marker_release (SPObject *marker, SPShape *shape)
919
item = (SPItem *) shape;
921
for (i = 0; i < SP_MARKER_LOC_QTY; i++) {
922
if (marker == shape->marker[i]) {
925
for (v = item->display; v != NULL; v = v->next) {
926
sp_marker_hide ((SPMarker *) (shape->marker[i]), NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i);
927
/* fixme: Do we need explicit remove here? (Lauris) */
928
/* nr_arena_item_set_mask (v->arenaitem, NULL); */
931
shape->release_connect[i].disconnect();
932
shape->modified_connect[i].disconnect();
933
shape->marker[i] = sp_object_hunref (shape->marker[i], item);
939
* No-op. Exists for handling 'modified' messages
942
sp_shape_marker_modified (SPObject */*marker*/, guint /*flags*/, SPItem */*item*/)
944
/* I think mask does update automagically */
945
/* g_warning ("Item %s mask %s modified", SP_OBJECT_ID (item), SP_OBJECT_ID (mask)); */
949
* Adds a new marker to shape object at the location indicated by key. value
950
* must be a valid URI reference resolvable from the shape object (i.e., present
951
* in the document <defs>). If the shape object already has a marker
952
* registered at the given position, it is removed first. Then the
953
* new marker is hrefed and its signals connected.
956
sp_shape_set_marker (SPObject *object, unsigned int key, const gchar *value)
958
SPItem *item = (SPItem *) object;
959
SPShape *shape = (SPShape *) object;
961
if (key > SP_MARKER_LOC_END) {
965
SPObject *mrk = sp_css_uri_reference_resolve (SP_OBJECT_DOCUMENT (object), value);
966
if (mrk != shape->marker[key]) {
967
if (shape->marker[key]) {
971
shape->release_connect[key].disconnect();
972
shape->modified_connect[key].disconnect();
975
for (v = item->display; v != NULL; v = v->next) {
976
sp_marker_hide ((SPMarker *) (shape->marker[key]),
977
NR_ARENA_ITEM_GET_KEY (v->arenaitem) + key);
978
/* fixme: Do we need explicit remove here? (Lauris) */
979
/* nr_arena_item_set_mask (v->arenaitem, NULL); */
983
shape->marker[key] = sp_object_hunref (shape->marker[key], object);
985
if (SP_IS_MARKER (mrk)) {
986
shape->marker[key] = sp_object_href (mrk, object);
987
shape->release_connect[key] = mrk->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_shape_marker_release), shape));
988
shape->modified_connect[key] = mrk->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_shape_marker_modified), shape));
998
* Calls any registered handlers for the set_shape action
1001
sp_shape_set_shape (SPShape *shape)
1003
g_return_if_fail (shape != NULL);
1004
g_return_if_fail (SP_IS_SHAPE (shape));
1006
if (SP_SHAPE_CLASS (G_OBJECT_GET_CLASS (shape))->set_shape) {
1007
SP_SHAPE_CLASS (G_OBJECT_GET_CLASS (shape))->set_shape (shape);
1012
* Adds a curve to the shape. If owner is specified, a reference
1013
* will be made, otherwise the curve will be copied into the shape.
1014
* Any existing curve in the shape will be unreferenced first.
1015
* This routine also triggers a request to update the display.
1018
sp_shape_set_curve (SPShape *shape, SPCurve *curve, unsigned int owner)
1021
shape->curve = shape->curve->unref();
1025
shape->curve = curve->ref();
1027
shape->curve = curve->copy();
1030
SP_OBJECT(shape)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
1034
* Return duplicate of curve (if any exists) or NULL if there is no curve
1037
sp_shape_get_curve (SPShape *shape)
1040
return shape->curve->copy();
1046
* Same as sp_shape_set_curve but without updating the display
1049
sp_shape_set_curve_insync (SPShape *shape, SPCurve *curve, unsigned int owner)
1052
shape->curve = shape->curve->unref();
1056
shape->curve = curve->ref();
1058
shape->curve = curve->copy();
1064
* Return all nodes in a path that are to be considered for snapping
1066
static void sp_shape_snappoints(SPItem const *item, bool const target, SnapPointsWithType &p, Inkscape::SnapPreferences const *snapprefs)
1068
g_assert(item != NULL);
1069
g_assert(SP_IS_SHAPE(item));
1071
SPShape const *shape = SP_SHAPE(item);
1072
if (shape->curve == NULL) {
1076
// Help enforcing strict snapping, i.e. only return nodes when we're snapping nodes to nodes or a guide to nodes
1077
if (!(snapprefs->getSnapModeNode() || snapprefs->getSnapModeGuide())) {
1081
Geom::PathVector const &pathv = shape->curve->get_pathvector();
1085
Geom::Matrix const i2d (sp_item_i2d_affine (item));
1089
if (snapprefs->getSnapObjectMidpoints()) {
1090
Geom::OptRect bbox = item->getBounds(sp_item_i2d_affine(item));
1092
type = target ? int(Inkscape::SNAPTARGET_OBJECT_MIDPOINT) : int(Inkscape::SNAPSOURCE_OBJECT_MIDPOINT);
1093
p.push_back(std::make_pair(bbox->midpoint(), type));
1097
for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
1098
if (snapprefs->getSnapToItemNode()) {
1099
type = target ? int(Inkscape::SNAPTARGET_NODE_CUSP) : int(Inkscape::SNAPSOURCE_NODE_CUSP);
1100
p.push_back(std::make_pair(path_it->initialPoint() * i2d, type));
1103
Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
1104
Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
1105
while (curve_it2 != path_it->end_closed())
1107
/* Test whether to add the node between curve_it1 and curve_it2.
1108
* Loop to end_closed (so always including closing segment); the last node to be added
1109
* is the node between the closing segment and the segment before that, regardless
1110
* of the path being closed or not. If the path is closed, the final point was already added by
1111
* adding the initial point. */
1113
Geom::NodeType nodetype = Geom::get_nodetype(*curve_it1, *curve_it2);
1115
bool c1 = snapprefs->getSnapToItemNode() && (nodetype == Geom::NODE_CUSP || nodetype == Geom::NODE_NONE);
1116
bool c2 = snapprefs->getSnapSmoothNodes() && (nodetype == Geom::NODE_SMOOTH || nodetype == Geom::NODE_SYMM);
1119
type = target ? int(Inkscape::SNAPTARGET_NODE_CUSP) : int(Inkscape::SNAPSOURCE_NODE_CUSP);
1120
p.push_back(std::make_pair(curve_it1->finalPoint() * i2d, type));
1123
// Consider midpoints of line segments for snapping
1124
if (snapprefs->getSnapLineMidpoints()) { // only do this when we're snapping nodes (enforce strict snapping)
1125
if (Geom::LineSegment const* line_segment = dynamic_cast<Geom::LineSegment const*>(&(*curve_it1))) {
1126
type = target ? int(Inkscape::SNAPTARGET_LINE_MIDPOINT) : int(Inkscape::SNAPSOURCE_LINE_MIDPOINT);
1127
p.push_back(std::make_pair(Geom::middle_point(*line_segment) * i2d, type));
1135
// Find the internal intersections of each path and consider these for snapping
1136
// (using "Method 1" as described in Inkscape::ObjectSnapper::_collectNodes())
1137
if (snapprefs->getSnapIntersectionCS()) {
1139
cs = self_crossings(*path_it);
1140
if (cs.size() > 0) { // There might be multiple intersections...
1141
for (Geom::Crossings::const_iterator i = cs.begin(); i != cs.end(); i++) {
1142
Geom::Point p_ix = (*path_it).pointAt((*i).ta);
1143
type = target ? int(Inkscape::SNAPTARGET_PATH_INTERSECTION) : int(Inkscape::SNAPSOURCE_PATH_INTERSECTION);
1144
p.push_back(std::make_pair(p_ix * i2d, type));
1155
c-file-style:"stroustrup"
1156
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1157
indent-tabs-mode:nil
1161
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
added
removed
inkscape-0.47pre1/src/sp-shape.cpp
