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