src/draw-context.cpp

   1 #define __SP_DRAW_CONTEXT_C__
   2
   3 /*
   4  * Generic drawing context
   5  *
   6  * Author:
   7  *   Lauris Kaplinski <lauris@kaplinski.com>
   8  *
   9  * Copyright (C) 2000 Lauris Kaplinski
  10  * Copyright (C) 2000-2001 Ximian, Inc.
  11  * Copyright (C) 2002 Lauris Kaplinski
  12  *
  13  * Released under GNU GPL, read the file 'COPYING' for more information
  14  */
  15
  16 #define DRAW_VERBOSE
  17
  18 #ifdef HAVE_CONFIG_H
  19 # include "config.h"
  20 #endif
  21 #include <gdk/gdkkeysyms.h>
  22
  23 #include "display/canvas-bpath.h"
  24 #include "xml/repr.h"
  25 #include "svg/svg.h"
  26 #include <glibmm/i18n.h>
  27 #include "libnr/n-art-bpath.h"
  28 #include "display/curve.h"
  29 #include "desktop.h"
  30 #include "desktop-affine.h"
  31 #include "desktop-handles.h"
  32 #include "desktop-style.h"
  33 #include "document.h"
  34 #include "draw-anchor.h"
  35 #include "macros.h"
  36 #include "message-stack.h"
  37 #include "pen-context.h"
  38 #include "prefs-utils.h"
  39 #include "selection.h"
  40 #include "selection-chemistry.h"
  41 #include "snap.h"
  42 #include "sp-path.h"
  43 #include "sp-namedview.h"
  44
  45 static void sp_draw_context_class_init(SPDrawContextClass *klass);
  46 static void sp_draw_context_init(SPDrawContext *dc);
  47 static void sp_draw_context_dispose(GObject *object);
  48
  49 static void sp_draw_context_setup(SPEventContext *ec);
  50 static void sp_draw_context_set(SPEventContext *ec, gchar const *key, gchar const *value);
  51 static void sp_draw_context_finish(SPEventContext *ec);
  52
  53 static gint sp_draw_context_root_handler(SPEventContext *event_context, GdkEvent *event);
  54
  55 static void spdc_selection_changed(Inkscape::Selection *sel, SPDrawContext *dc);
  56 static void spdc_selection_modified(Inkscape::Selection *sel, guint flags, SPDrawContext *dc);
  57
  58 static void spdc_attach_selection(SPDrawContext *dc, Inkscape::Selection *sel);
  59
  60 static void spdc_flush_white(SPDrawContext *dc, SPCurve *gc);
  61
  62 static void spdc_reset_white(SPDrawContext *dc);
  63 static void spdc_free_colors(SPDrawContext *dc);
  64
  65
  66 static SPEventContextClass *draw_parent_class;
  67
  68
  69 GType
  70 sp_draw_context_get_type(void)
  71 {
  72     static GType type = 0;
  73     if (!type) {
  74         GTypeInfo info = {
  75             sizeof(SPDrawContextClass),
  76             NULL, NULL,
  77             (GClassInitFunc) sp_draw_context_class_init,
  78             NULL, NULL,
  79             sizeof(SPDrawContext),
  80             4,
  81             (GInstanceInitFunc) sp_draw_context_init,
  82             NULL,   /* value_table */
  83         };
  84         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPDrawContext", &info, (GTypeFlags)0);
  85     }
  86     return type;
  87 }
  88
  89 static void
  90 sp_draw_context_class_init(SPDrawContextClass *klass)
  91 {
  92     GObjectClass *object_class;
  93     SPEventContextClass *ec_class;
  94
  95     object_class = (GObjectClass *)klass;
  96     ec_class = (SPEventContextClass *) klass;
  97
  98     draw_parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
  99
 100     object_class->dispose = sp_draw_context_dispose;
 101
 102     ec_class->setup = sp_draw_context_setup;
 103     ec_class->set = sp_draw_context_set;
 104     ec_class->finish = sp_draw_context_finish;
 105     ec_class->root_handler = sp_draw_context_root_handler;
 106 }
 107
 108 static void
 109 sp_draw_context_init(SPDrawContext *dc)
 110 {
 111     dc->attach = FALSE;
 112
 113     dc->red_color = 0xff00007f;
 114     dc->blue_color = 0x0000ff7f;
 115     dc->green_color = 0x00ff007f;
 116     dc->red_curve_is_valid = false;
 117
 118     dc->waiting_LPE = Inkscape::LivePathEffect::INVALID_LPE;
 119
 120     new (&dc->sel_changed_connection) sigc::connection();
 121     new (&dc->sel_modified_connection) sigc::connection();
 122 }
 123
 124 static void
 125 sp_draw_context_dispose(GObject *object)
 126 {
 127     SPDrawContext *dc = SP_DRAW_CONTEXT(object);
 128
 129     dc->sel_changed_connection.~connection();
 130     dc->sel_modified_connection.~connection();
 131
 132     if (dc->grab) {
 133         sp_canvas_item_ungrab(dc->grab, GDK_CURRENT_TIME);
 134         dc->grab = NULL;
 135     }
 136
 137     if (dc->selection) {
 138         dc->selection = NULL;
 139     }
 140
 141     spdc_free_colors(dc);
 142
 143     G_OBJECT_CLASS(draw_parent_class)->dispose(object);
 144 }
 145
 146 static void
 147 sp_draw_context_setup(SPEventContext *ec)
 148 {
 149     SPDrawContext *dc = SP_DRAW_CONTEXT(ec);
 150     SPDesktop *dt = ec->desktop;
 151
 152     if (((SPEventContextClass *) draw_parent_class)->setup) {
 153         ((SPEventContextClass *) draw_parent_class)->setup(ec);
 154     }
 155
 156     dc->selection = sp_desktop_selection(dt);
 157
 158     /* Connect signals to track selection changes */
 159     dc->sel_changed_connection = dc->selection->connectChanged(
 160         sigc::bind(sigc::ptr_fun(&spdc_selection_changed), dc)
 161     );
 162     dc->sel_modified_connection = dc->selection->connectModified(
 163         sigc::bind(sigc::ptr_fun(&spdc_selection_modified), dc)
 164     );
 165
 166     /* Create red bpath */
 167     dc->red_bpath = sp_canvas_bpath_new(sp_desktop_sketch(ec->desktop), NULL);
 168     sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(dc->red_bpath), dc->red_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 169     /* Create red curve */
 170     dc->red_curve = new SPCurve(4);
 171
 172     /* Create blue bpath */
 173     dc->blue_bpath = sp_canvas_bpath_new(sp_desktop_sketch(ec->desktop), NULL);
 174     sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(dc->blue_bpath), dc->blue_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 175     /* Create blue curve */
 176     dc->blue_curve = new SPCurve(8);
 177
 178     /* Create green curve */
 179     dc->green_curve = new SPCurve(64);
 180     /* No green anchor by default */
 181     dc->green_anchor = NULL;
 182     dc->green_closed = FALSE;
 183
 184     dc->attach = TRUE;
 185     spdc_attach_selection(dc, dc->selection);
 186 }
 187
 188 static void
 189 sp_draw_context_finish(SPEventContext *ec)
 190 {
 191     SPDrawContext *dc = SP_DRAW_CONTEXT(ec);
 192
 193     dc->sel_changed_connection.disconnect();
 194     dc->sel_modified_connection.disconnect();
 195
 196     if (dc->grab) {
 197         sp_canvas_item_ungrab(dc->grab, GDK_CURRENT_TIME);
 198     }
 199
 200     if (dc->selection) {
 201         dc->selection = NULL;
 202     }
 203
 204     spdc_free_colors(dc);
 205 }
 206
 207 static void
 208 sp_draw_context_set(SPEventContext */*ec*/, const gchar */*key*/, const gchar */*value*/)
 209 {
 210 }
 211
 212 gint
 213 sp_draw_context_root_handler(SPEventContext *ec, GdkEvent *event)
 214 {
 215     gint ret = FALSE;
 216
 217     switch (event->type) {
 218         case GDK_KEY_PRESS:
 219             switch (get_group0_keyval (&event->key)) {
 220                 case GDK_Up:
 221                 case GDK_Down:
 222                 case GDK_KP_Up:
 223                 case GDK_KP_Down:
 224                     // prevent the zoom field from activation
 225                     if (!MOD__CTRL_ONLY) {
 226                         ret = TRUE;
 227                     }
 228                     break;
 229                 default:
 230             break;
 231         }
 232         break;
 233     default:
 234         break;
 235     }
 236
 237     if (!ret) {
 238         if (((SPEventContextClass *) draw_parent_class)->root_handler) {
 239             ret = ((SPEventContextClass *) draw_parent_class)->root_handler(ec, event);
 240         }
 241     }
 242
 243     return ret;
 244 }
 245
 246 /*
 247  * If we have an item and a waiting LPE, apply the effect to the item
 248  */
 249 void
 250 spdc_check_for_and_apply_waiting_LPE(SPDrawContext *dc, SPItem *item)
 251 {
 252     if (item && dc->waiting_LPE != Inkscape::LivePathEffect::INVALID_LPE) {
 253         Inkscape::LivePathEffect::Effect::createAndApply(dc->waiting_LPE, dc->desktop->doc(), item);
 254     }
 255 }
 256
 257 /*
 258  * Selection handlers
 259  */
 260
 261 static void
 262 spdc_selection_changed(Inkscape::Selection *sel, SPDrawContext *dc)
 263 {
 264     spdc_check_for_and_apply_waiting_LPE(dc, sel->singleItem());
 265
 266     if (dc->attach) {
 267         spdc_attach_selection(dc, sel);
 268     }
 269 }
 270
 271 /* fixme: We have to ensure this is not delayed (Lauris) */
 272
 273 static void
 274 spdc_selection_modified(Inkscape::Selection *sel, guint /*flags*/, SPDrawContext *dc)
 275 {
 276     if (dc->attach) {
 277         spdc_attach_selection(dc, sel);
 278     }
 279 }
 280
 281 static void
 282 spdc_attach_selection(SPDrawContext *dc, Inkscape::Selection */*sel*/)
 283 {
 284     /* We reset white and forget white/start/end anchors */
 285     spdc_reset_white(dc);
 286     dc->sa = NULL;
 287     dc->ea = NULL;
 288
 289     SPItem *item = dc->selection ? dc->selection->singleItem() : NULL;
 290
 291     if ( item && SP_IS_PATH(item) ) {
 292         /* Create new white data */
 293         /* Item */
 294         dc->white_item = item;
 295         /* Curve list */
 296         /* We keep it in desktop coordinates to eliminate calculation errors */
 297         SPCurve *norm = sp_path_get_curve_for_edit (SP_PATH(item));
 298         norm->transform(sp_item_i2d_affine(dc->white_item));
 299         g_return_if_fail( norm != NULL );
 300         dc->white_curves = g_slist_reverse(norm->split());
 301         norm->unref();
 302         /* Anchor list */
 303         for (GSList *l = dc->white_curves; l != NULL; l = l->next) {
 304             SPCurve *c;
 305             c = (SPCurve*)l->data;
 306             g_return_if_fail( c->_end > 1 );
 307             if ( SP_CURVE_BPATH(c)->code == NR_MOVETO_OPEN ) {
 308                 NArtBpath *s, *e;
 309                 SPDrawAnchor *a;
 310                 s = c->first_bpath();
 311                 e = c->last_bpath();
 312                 a = sp_draw_anchor_new(dc, c, TRUE, NR::Point(s->x3, s->y3));
 313                 dc->white_anchors = g_slist_prepend(dc->white_anchors, a);
 314                 a = sp_draw_anchor_new(dc, c, FALSE, NR::Point(e->x3, e->y3));
 315                 dc->white_anchors = g_slist_prepend(dc->white_anchors, a);
 316             }
 317         }
 318         /* fixme: recalculate active anchor? */
 319     }
 320 }
 321
 322
 323 /**
 324  *  Snaps node or handle to PI/rotationsnapsperpi degree increments.
 325  *
 326  *  \param dc draw context
 327  *  \param p cursor point (to be changed by snapping)
 328  *  \param o origin point
 329  *  \param state  keyboard state to check if ctrl was pressed
 330 */
 331
 332 void spdc_endpoint_snap_rotation(SPEventContext const *const ec, NR::Point &p, NR::Point const o,
 333                                  guint state)
 334 {
 335     /* Control must be down for this snap to work */
 336     if ((state & GDK_CONTROL_MASK) == 0) {
 337         return;
 338     }
 339
 340     unsigned const snaps = abs(prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12));
 341     /* 0 means no snapping. */
 342
 343     /* mirrored by fabs, so this corresponds to 15 degrees */
 344     NR::Point best; /* best solution */
 345     double bn = NR_HUGE; /* best normal */
 346     double bdot = 0;
 347     NR::Point v = NR::Point(0, 1);
 348     double const r00 = cos(M_PI / snaps), r01 = sin(M_PI / snaps);
 349     double const r10 = -r01, r11 = r00;
 350
 351     NR::Point delta = p - o;
 352
 353     for (unsigned i = 0; i < snaps; i++) {
 354         double const ndot = fabs(dot(v,NR::rot90(delta)));
 355         NR::Point t(r00*v[NR::X] + r01*v[NR::Y],
 356                     r10*v[NR::X] + r11*v[NR::Y]);
 357         if (ndot < bn) {
 358             /* I think it is better numerically to use the normal, rather than the dot product
 359              * to assess solutions, but I haven't proven it. */
 360             bn = ndot;
 361             best = v;
 362             bdot = dot(v, delta);
 363         }
 364         v = t;
 365     }
 366
 367     if (fabs(bdot) > 0) {
 368         p = o + bdot * best;
 369
 370         /* Snap it along best vector */
 371         SnapManager &m = SP_EVENT_CONTEXT_DESKTOP(ec)->namedview->snap_manager;
 372         m.setup(SP_EVENT_CONTEXT_DESKTOP(ec), NULL);
 373         m.constrainedSnapReturnByRef( Inkscape::Snapper::SNAPPOINT_NODE, p, Inkscape::Snapper::ConstraintLine(best));
 374     }
 375 }
 376
 377
 378 void spdc_endpoint_snap_free(SPEventContext const * const ec, NR::Point& p, guint const state)
 379 {
 380     /* Shift disables this snap */
 381     if (state & GDK_SHIFT_MASK) {
 382         return;
 383     }
 384
 385     SnapManager &m = SP_EVENT_CONTEXT_DESKTOP(ec)->namedview->snap_manager;
 386     m.setup(SP_EVENT_CONTEXT_DESKTOP(ec), NULL);
 387     m.freeSnapReturnByRef(Inkscape::Snapper::SNAPPOINT_NODE, p);
 388 }
 389
 390 static SPCurve *
 391 reverse_then_unref(SPCurve *orig)
 392 {
 393     SPCurve *ret = orig->create_reverse();
 394     orig->unref();
 395     return ret;
 396 }
 397
 398 /**
 399  * Concats red, blue and green.
 400  * If any anchors are defined, process these, optionally removing curves from white list
 401  * Invoke _flush_white to write result back to object.
 402  */
 403 void
 404 spdc_concat_colors_and_flush(SPDrawContext *dc, gboolean forceclosed)
 405 {
 406     /* Concat RBG */
 407     SPCurve *c = dc->green_curve;
 408
 409     /* Green */
 410     dc->green_curve = new SPCurve(64);
 411     while (dc->green_bpaths) {
 412         gtk_object_destroy(GTK_OBJECT(dc->green_bpaths->data));
 413         dc->green_bpaths = g_slist_remove(dc->green_bpaths, dc->green_bpaths->data);
 414     }
 415     /* Blue */
 416     c->append_continuous(dc->blue_curve, 0.0625);
 417     dc->blue_curve->reset();
 418     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(dc->blue_bpath), NULL);
 419     /* Red */
 420     if (dc->red_curve_is_valid) {
 421         c->append_continuous(dc->red_curve, 0.0625);
 422     }
 423     dc->red_curve->reset();
 424     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(dc->red_bpath), NULL);
 425
 426     if (c->is_empty()) {
 427         c->unref();
 428         return;
 429     }
 430
 431     /* Step A - test, whether we ended on green anchor */
 432     if ( forceclosed || ( dc->green_anchor && dc->green_anchor->active ) ) {
 433         // We hit green anchor, closing Green-Blue-Red
 434         SP_EVENT_CONTEXT_DESKTOP(dc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Path is closed."));
 435         c->closepath_current();
 436         /* Closed path, just flush */
 437         spdc_flush_white(dc, c);
 438         c->unref();
 439         return;
 440     }
 441
 442     /* Step B - both start and end anchored to same curve */
 443     if ( dc->sa && dc->ea
 444          && ( dc->sa->curve == dc->ea->curve )
 445          && ( ( dc->sa != dc->ea )
 446               || dc->sa->curve->is_closed() ) )
 447     {
 448         // We hit bot start and end of single curve, closing paths
 449         SP_EVENT_CONTEXT_DESKTOP(dc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Closing path."));
 450         if (dc->sa->start && !(dc->sa->curve->is_closed()) ) {
 451             c = reverse_then_unref(c);
 452         }
 453         dc->sa->curve->append_continuous(c, 0.0625);
 454         c->unref();
 455         dc->sa->curve->closepath_current();
 456         spdc_flush_white(dc, NULL);
 457         return;
 458     }
 459
 460     /* Step C - test start */
 461     if (dc->sa) {
 462         SPCurve *s = dc->sa->curve;
 463         dc->white_curves = g_slist_remove(dc->white_curves, s);
 464         if (dc->sa->start) {
 465             s = reverse_then_unref(s);
 466         }
 467         s->append_continuous(c, 0.0625);
 468         c->unref();
 469         c = s;
 470     } else /* Step D - test end */ if (dc->ea) {
 471         SPCurve *e = dc->ea->curve;
 472         dc->white_curves = g_slist_remove(dc->white_curves, e);
 473         if (!dc->ea->start) {
 474             e = reverse_then_unref(e);
 475         }
 476         c->append_continuous(e, 0.0625);
 477         e->unref();
 478     }
 479
 480
 481     spdc_flush_white(dc, c);
 482
 483     c->unref();
 484 }
 485
 486 static char const *
 487 tool_name(SPDrawContext *dc)
 488 {
 489     return ( SP_IS_PEN_CONTEXT(dc)
 490              ? "tools.freehand.pen"
 491              : "tools.freehand.pencil" );
 492 }
 493
 494 /*
 495  * Flushes white curve(s) and additional curve into object
 496  *
 497  * No cleaning of colored curves - this has to be done by caller
 498  * No rereading of white data, so if you cannot rely on ::modified, do it in caller
 499  *
 500  */
 501
 502 static void
 503 spdc_flush_white(SPDrawContext *dc, SPCurve *gc)
 504 {
 505     SPCurve *c;
 506
 507     if (dc->white_curves) {
 508         g_assert(dc->white_item);
 509         c = SPCurve::concat(dc->white_curves);
 510         g_slist_free(dc->white_curves);
 511         dc->white_curves = NULL;
 512         if (gc) {
 513             c->append(gc, FALSE);
 514         }
 515     } else if (gc) {
 516         c = gc;
 517         c->ref();
 518     } else {
 519         return;
 520     }
 521
 522     /* Now we have to go back to item coordinates at last */
 523     c->transform(( dc->white_item
 524                             ? sp_item_dt2i_affine(dc->white_item)
 525                             : sp_desktop_dt2root_affine(SP_EVENT_CONTEXT_DESKTOP(dc)) ));
 526
 527     SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(dc);
 528     SPDocument *doc = sp_desktop_document(desktop);
 529     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
 530
 531     if ( c && !c->is_empty() ) {
 532         /* We actually have something to write */
 533
 534         bool has_lpe = false;
 535         Inkscape::XML::Node *repr;
 536         if (dc->white_item) {
 537             repr = SP_OBJECT_REPR(dc->white_item);
 538             has_lpe = sp_lpe_item_has_path_effect_recursive(SP_LPE_ITEM(dc->white_item));
 539         } else {
 540             repr = xml_doc->createElement("svg:path");
 541             /* Set style */
 542             sp_desktop_apply_style_tool(desktop, repr, tool_name(dc), false);
 543         }
 544
 545         gchar *str = sp_svg_write_path(SP_CURVE_BPATH(c));
 546         g_assert( str != NULL );
 547         if (has_lpe)
 548             repr->setAttribute("inkscape:original-d", str);
 549         else
 550             repr->setAttribute("d", str);
 551         g_free(str);
 552
 553         if (!dc->white_item) {
 554             /* Attach repr */
 555             SPItem *item = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr));
 556             dc->selection->set(repr);
 557             Inkscape::GC::release(repr);
 558             item->transform = i2i_affine(desktop->currentRoot(), desktop->currentLayer());
 559             item->updateRepr();
 560         }
 561
 562         sp_document_done(doc, SP_IS_PEN_CONTEXT(dc)? SP_VERB_CONTEXT_PEN : SP_VERB_CONTEXT_PENCIL,
 563                          _("Draw path"));
 564
 565         // When quickly drawing several subpaths with Shift, the next subpath may be finished and
 566         // flushed before the selection_modified signal is fired by the previous change, which
 567         // results in the tool losing all of the selected path's curve except that last subpath. To
 568         // fix this, we force the selection_modified callback now, to make sure the tool's curve is
 569         // in sync immediately.
 570         spdc_selection_modified(sp_desktop_selection(desktop), 0, dc);
 571     }
 572
 573     c->unref();
 574
 575     /* Flush pending updates */
 576     sp_document_ensure_up_to_date(doc);
 577 }
 578
 579 /**
 580  * Returns FIRST active anchor (the activated one).
 581  */
 582 SPDrawAnchor *
 583 spdc_test_inside(SPDrawContext *dc, NR::Point p)
 584 {
 585     SPDrawAnchor *active = NULL;
 586
 587     /* Test green anchor */
 588     if (dc->green_anchor) {
 589         active = sp_draw_anchor_test(dc->green_anchor, p, TRUE);
 590     }
 591
 592     for (GSList *l = dc->white_anchors; l != NULL; l = l->next) {
 593         SPDrawAnchor *na = sp_draw_anchor_test((SPDrawAnchor *) l->data, p, !active);
 594         if ( !active && na ) {
 595             active = na;
 596         }
 597     }
 598
 599     return active;
 600 }
 601
 602 static void
 603 spdc_reset_white(SPDrawContext *dc)
 604 {
 605     if (dc->white_item) {
 606         /* We do not hold refcount */
 607         dc->white_item = NULL;
 608     }
 609     while (dc->white_curves) {
 610         reinterpret_cast<SPCurve *>(dc->white_curves->data)->unref();
 611         dc->white_curves = g_slist_remove(dc->white_curves, dc->white_curves->data);
 612     }
 613     while (dc->white_anchors) {
 614         sp_draw_anchor_destroy((SPDrawAnchor *) dc->white_anchors->data);
 615         dc->white_anchors = g_slist_remove(dc->white_anchors, dc->white_anchors->data);
 616     }
 617 }
 618
 619 static void
 620 spdc_free_colors(SPDrawContext *dc)
 621 {
 622     /* Red */
 623     if (dc->red_bpath) {
 624         gtk_object_destroy(GTK_OBJECT(dc->red_bpath));
 625         dc->red_bpath = NULL;
 626     }
 627     if (dc->red_curve) {
 628         dc->red_curve = dc->red_curve->unref();
 629     }
 630     /* Blue */
 631     if (dc->blue_bpath) {
 632         gtk_object_destroy(GTK_OBJECT(dc->blue_bpath));
 633         dc->blue_bpath = NULL;
 634     }
 635     if (dc->blue_curve) {
 636         dc->blue_curve = dc->blue_curve->unref();
 637     }
 638     /* Green */
 639     while (dc->green_bpaths) {
 640         gtk_object_destroy(GTK_OBJECT(dc->green_bpaths->data));
 641         dc->green_bpaths = g_slist_remove(dc->green_bpaths, dc->green_bpaths->data);
 642     }
 643     if (dc->green_curve) {
 644         dc->green_curve = dc->green_curve->unref();
 645     }
 646     if (dc->green_anchor) {
 647         dc->green_anchor = sp_draw_anchor_destroy(dc->green_anchor);
 648     }
 649     /* White */
 650     if (dc->white_item) {
 651         /* We do not hold refcount */
 652         dc->white_item = NULL;
 653     }
 654     while (dc->white_curves) {
 655         reinterpret_cast<SPCurve *>(dc->white_curves->data)->unref();
 656         dc->white_curves = g_slist_remove(dc->white_curves, dc->white_curves->data);
 657     }
 658     while (dc->white_anchors) {
 659         sp_draw_anchor_destroy((SPDrawAnchor *) dc->white_anchors->data);
 660         dc->white_anchors = g_slist_remove(dc->white_anchors, dc->white_anchors->data);
 661     }
 662 }
 663
 664
 665 /*
 666   Local Variables:
 667   mode:c++
 668   c-file-style:"stroustrup"
 669   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 670   indent-tabs-mode:nil
 671   fill-column:99
 672   End:
 673 */
 674 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :