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 = sp_curve_new_sized(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 = sp_curve_new_sized(8);
 174
 175     /* Create green curve */
 176     dc->green_curve = sp_curve_new_sized(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     //SPDrawContext *dc = SP_DRAW_CONTEXT(ec);
 213     SPDesktop *desktop = ec->desktop;
 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_Escape:
 221                     sp_desktop_selection(desktop)->clear();
 222                     ret = TRUE;
 223                     break;
 224                 case GDK_Tab: // Tab - cycle selection forward
 225                     if (!(MOD__CTRL_ONLY || (MOD__CTRL && MOD__SHIFT))) {
 226                         sp_selection_item_next();
 227                         ret = TRUE;
 228                     }
 229                     break;
 230                 case GDK_ISO_Left_Tab: // Shift Tab - cycle selection backward
 231                     if (!(MOD__CTRL_ONLY || (MOD__CTRL && MOD__SHIFT))) {
 232                         sp_selection_item_prev();
 233                         ret = TRUE;
 234                     }
 235                     break;
 236                 case GDK_Up:
 237                 case GDK_Down:
 238                 case GDK_KP_Up:
 239                 case GDK_KP_Down:
 240                     // prevent the zoom field from activation
 241                     if (!MOD__CTRL_ONLY) {
 242                         ret = TRUE;
 243                     }
 244                     break;
 245                 default:
 246             break;
 247         }
 248         break;
 249     default:
 250         break;
 251     }
 252
 253     if (!ret) {
 254         if (((SPEventContextClass *) draw_parent_class)->root_handler) {
 255             ret = ((SPEventContextClass *) draw_parent_class)->root_handler(ec, event);
 256         }
 257     }
 258
 259     return ret;
 260 }
 261
 262
 263 /*
 264  * Selection handlers
 265  */
 266
 267 static void
 268 spdc_selection_changed(Inkscape::Selection *sel, SPDrawContext *dc)
 269 {
 270     if (dc->attach) {
 271         spdc_attach_selection(dc, sel);
 272     }
 273 }
 274
 275 /* fixme: We have to ensure this is not delayed (Lauris) */
 276
 277 static void
 278 spdc_selection_modified(Inkscape::Selection *sel, guint flags, SPDrawContext *dc)
 279 {
 280     if (dc->attach) {
 281         spdc_attach_selection(dc, sel);
 282     }
 283 }
 284
 285 static void
 286 spdc_attach_selection(SPDrawContext *dc, Inkscape::Selection *sel)
 287 {
 288     /* We reset white and forget white/start/end anchors */
 289     spdc_reset_white(dc);
 290     dc->sa = NULL;
 291     dc->ea = NULL;
 292
 293     SPItem *item = dc->selection ? dc->selection->singleItem() : NULL;
 294
 295     if ( item && SP_IS_PATH(item) ) {
 296         /* Create new white data */
 297         /* Item */
 298         dc->white_item = item;
 299         /* Curve list */
 300         /* We keep it in desktop coordinates to eliminate calculation errors */
 301         SPCurve *norm = sp_shape_get_curve(SP_SHAPE(item));
 302         sp_curve_transform(norm, sp_item_i2d_affine(dc->white_item));
 303         g_return_if_fail( norm != NULL );
 304         dc->white_curves = sp_curve_split(norm);
 305         sp_curve_unref(norm);
 306         /* Anchor list */
 307         for (GSList *l = dc->white_curves; l != NULL; l = l->next) {
 308             SPCurve *c;
 309             c = (SPCurve*)l->data;
 310             g_return_if_fail( c->end > 1 );
 311             if ( c->bpath->code == NR_MOVETO_OPEN ) {
 312                 NArtBpath *s, *e;
 313                 SPDrawAnchor *a;
 314                 s = sp_curve_first_bpath(c);
 315                 e = sp_curve_last_bpath(c);
 316                 a = sp_draw_anchor_new(dc, c, TRUE, NR::Point(s->x3, s->y3));
 317                 dc->white_anchors = g_slist_prepend(dc->white_anchors, a);
 318                 a = sp_draw_anchor_new(dc, c, FALSE, NR::Point(e->x3, e->y3));
 319                 dc->white_anchors = g_slist_prepend(dc->white_anchors, a);
 320             }
 321         }
 322         /* fixme: recalculate active anchor? */
 323     }
 324 }
 325
 326
 327 /**
 328  *  Snaps node or handle to PI/rotationsnapsperpi degree increments.
 329  *
 330  *  \param dc draw context
 331  *  \param p cursor point (to be changed by snapping)
 332  *  \param o origin point
 333  *  \param state  keyboard state to check if ctrl was pressed
 334 */
 335
 336 void spdc_endpoint_snap_rotation(SPEventContext const *const ec, NR::Point &p, NR::Point const o,
 337                                  guint state)
 338 {
 339     /* Control must be down for this snap to work */
 340     if ((state & GDK_CONTROL_MASK) == 0) {
 341         return;
 342     }
 343
 344     unsigned const snaps = abs(prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12));
 345     /* 0 means no snapping. */
 346
 347     /* mirrored by fabs, so this corresponds to 15 degrees */
 348     NR::Point best; /* best solution */
 349     double bn = NR_HUGE; /* best normal */
 350     double bdot = 0;
 351     NR::Point v = NR::Point(0, 1);
 352     double const r00 = cos(M_PI / snaps), r01 = sin(M_PI / snaps);
 353     double const r10 = -r01, r11 = r00;
 354
 355     NR::Point delta = p - o;
 356
 357     for (unsigned i = 0; i < snaps; i++) {
 358         double const ndot = fabs(dot(v,NR::rot90(delta)));
 359         NR::Point t(r00*v[NR::X] + r01*v[NR::Y],
 360                     r10*v[NR::X] + r11*v[NR::Y]);
 361         if (ndot < bn) {
 362             /* I think it is better numerically to use the normal, rather than the dot product
 363              * to assess solutions, but I haven't proven it. */
 364             bn = ndot;
 365             best = v;
 366             bdot = dot(v, delta);
 367         }
 368         v = t;
 369     }
 370
 371     if (fabs(bdot) > 0) {
 372         p = o + bdot * best;
 373
 374         /* Snap it along best vector */
 375         SnapManager const &m = SP_EVENT_CONTEXT_DESKTOP(ec)->namedview->snap_manager;
 376         p = m.constrainedSnap(Inkscape::Snapper::SNAP_POINT | Inkscape::Snapper::BBOX_POINT,
 377                               p, Inkscape::Snapper::ConstraintLine(best), NULL).getPoint();
 378     }
 379 }
 380
 381
 382 void spdc_endpoint_snap_free(SPEventContext const * const ec, NR::Point& p, guint const state)
 383 {
 384     /* Shift disables this snap */
 385     if (state & GDK_SHIFT_MASK) {
 386         return;
 387     }
 388
 389     /* FIXME: this should be doing bbox snap as well */
 390     SnapManager const &m = SP_EVENT_CONTEXT_DESKTOP(ec)->namedview->snap_manager;
 391     p = m.freeSnap(Inkscape::Snapper::BBOX_POINT | Inkscape::Snapper::SNAP_POINT, p, NULL).getPoint();
 392 }
 393
 394 static SPCurve *
 395 reverse_then_unref(SPCurve *orig)
 396 {
 397     SPCurve *ret = sp_curve_reverse(orig);
 398     sp_curve_unref(orig);
 399     return ret;
 400 }
 401
 402 /**
 403  * Concats red, blue and green.
 404  * If any anchors are defined, process these, optionally removing curves from white list
 405  * Invoke _flush_white to write result back to object.
 406  */
 407 void
 408 spdc_concat_colors_and_flush(SPDrawContext *dc, gboolean forceclosed)
 409 {
 410     /* Concat RBG */
 411     SPCurve *c = dc->green_curve;
 412
 413     /* Green */
 414     dc->green_curve = sp_curve_new_sized(64);
 415     while (dc->green_bpaths) {
 416         gtk_object_destroy(GTK_OBJECT(dc->green_bpaths->data));
 417         dc->green_bpaths = g_slist_remove(dc->green_bpaths, dc->green_bpaths->data);
 418     }
 419     /* Blue */
 420     sp_curve_append_continuous(c, dc->blue_curve, 0.0625);
 421     sp_curve_reset(dc->blue_curve);
 422     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(dc->blue_bpath), NULL);
 423     /* Red */
 424     if (dc->red_curve_is_valid) {
 425         sp_curve_append_continuous(c, dc->red_curve, 0.0625);
 426     }
 427     sp_curve_reset(dc->red_curve);
 428     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(dc->red_bpath), NULL);
 429
 430     if (sp_curve_empty(c)) {
 431         sp_curve_unref(c);
 432         return;
 433     }
 434
 435     /* Step A - test, whether we ended on green anchor */
 436     if ( forceclosed || ( dc->green_anchor && dc->green_anchor->active ) ) {
 437         // We hit green anchor, closing Green-Blue-Red
 438         SP_EVENT_CONTEXT_DESKTOP(dc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Path is closed."));
 439         sp_curve_closepath_current(c);
 440         /* Closed path, just flush */
 441         spdc_flush_white(dc, c);
 442         sp_curve_unref(c);
 443         return;
 444     }
 445
 446     /* Step B - both start and end anchored to same curve */
 447     if ( dc->sa && dc->ea
 448          && ( dc->sa->curve == dc->ea->curve )
 449          && ( ( dc->sa != dc->ea )
 450               || dc->sa->curve->closed ) )
 451     {
 452         // We hit bot start and end of single curve, closing paths
 453         SP_EVENT_CONTEXT_DESKTOP(dc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Closing path."));
 454         if (dc->sa->start && !(dc->sa->curve->closed) ) {
 455             c = reverse_then_unref(c);
 456         }
 457         sp_curve_append_continuous(dc->sa->curve, c, 0.0625);
 458         sp_curve_unref(c);
 459         sp_curve_closepath_current(dc->sa->curve);
 460         spdc_flush_white(dc, NULL);
 461         return;
 462     }
 463
 464     /* Step C - test start */
 465     if (dc->sa) {
 466         SPCurve *s = dc->sa->curve;
 467         dc->white_curves = g_slist_remove(dc->white_curves, s);
 468         if (dc->sa->start) {
 469             s = reverse_then_unref(s);
 470         }
 471         sp_curve_append_continuous(s, c, 0.0625);
 472         sp_curve_unref(c);
 473         c = s;
 474     } else /* Step D - test end */ if (dc->ea) {
 475         SPCurve *e = dc->ea->curve;
 476         dc->white_curves = g_slist_remove(dc->white_curves, e);
 477         if (!dc->ea->start) {
 478             e = reverse_then_unref(e);
 479         }
 480         sp_curve_append_continuous(c, e, 0.0625);
 481         sp_curve_unref(e);
 482     }
 483
 484
 485     spdc_flush_white(dc, c);
 486
 487     sp_curve_unref(c);
 488 }
 489
 490 static char const *
 491 tool_name(SPDrawContext *dc)
 492 {
 493     return ( SP_IS_PEN_CONTEXT(dc)
 494              ? "tools.freehand.pen"
 495              : "tools.freehand.pencil" );
 496 }
 497
 498 /*
 499  * Flushes white curve(s) and additional curve into object
 500  *
 501  * No cleaning of colored curves - this has to be done by caller
 502  * No rereading of white data, so if you cannot rely on ::modified, do it in caller
 503  *
 504  */
 505
 506 static void
 507 spdc_flush_white(SPDrawContext *dc, SPCurve *gc)
 508 {
 509     SPCurve *c;
 510
 511     if (dc->white_curves) {
 512         g_assert(dc->white_item);
 513         c = sp_curve_concat(dc->white_curves);
 514         g_slist_free(dc->white_curves);
 515         dc->white_curves = NULL;
 516         if (gc) {
 517             sp_curve_append(c, gc, FALSE);
 518         }
 519     } else if (gc) {
 520         c = gc;
 521         sp_curve_ref(c);
 522     } else {
 523         return;
 524     }
 525
 526     /* Now we have to go back to item coordinates at last */
 527     sp_curve_transform(c, ( dc->white_item
 528                             ? sp_item_dt2i_affine(dc->white_item)
 529                             : sp_desktop_dt2root_affine(SP_EVENT_CONTEXT_DESKTOP(dc)) ));
 530
 531     SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(dc);
 532     SPDocument *doc = sp_desktop_document(desktop);
 533
 534     if ( c && !sp_curve_empty(c) ) {
 535         /* We actually have something to write */
 536
 537         Inkscape::XML::Node *repr;
 538         if (dc->white_item) {
 539             repr = SP_OBJECT_REPR(dc->white_item);
 540         } else {
 541             repr = sp_repr_new("svg:path");
 542             /* Set style */
 543             sp_desktop_apply_style_tool(desktop, repr, tool_name(dc), false);
 544         }
 545
 546         gchar *str = sp_svg_write_path(SP_CURVE_BPATH(c));
 547         g_assert( str != NULL );
 548         repr->setAttribute("d", str);
 549         g_free(str);
 550
 551         if (!dc->white_item) {
 552             /* Attach repr */
 553             SPItem *item = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr));
 554             dc->selection->set(repr);
 555             Inkscape::GC::release(repr);
 556             item->transform = i2i_affine(desktop->currentRoot(), desktop->currentLayer());
 557             item->updateRepr();
 558         }
 559
 560         sp_document_done(doc);
 561     }
 562
 563     sp_curve_unref(c);
 564
 565     /* Flush pending updates */
 566     sp_document_ensure_up_to_date(doc);
 567 }
 568
 569 /**
 570  * Returns FIRST active anchor (the activated one).
 571  */
 572 SPDrawAnchor *
 573 spdc_test_inside(SPDrawContext *dc, NR::Point p)
 574 {
 575     SPDrawAnchor *active = NULL;
 576
 577     /* Test green anchor */
 578     if (dc->green_anchor) {
 579         active = sp_draw_anchor_test(dc->green_anchor, p, TRUE);
 580     }
 581
 582     for (GSList *l = dc->white_anchors; l != NULL; l = l->next) {
 583         SPDrawAnchor *na = sp_draw_anchor_test((SPDrawAnchor *) l->data, p, !active);
 584         if ( !active && na ) {
 585             active = na;
 586         }
 587     }
 588
 589     return active;
 590 }
 591
 592 static void
 593 spdc_reset_white(SPDrawContext *dc)
 594 {
 595     if (dc->white_item) {
 596         /* We do not hold refcount */
 597         dc->white_item = NULL;
 598     }
 599     while (dc->white_curves) {
 600         sp_curve_unref((SPCurve *) dc->white_curves->data);
 601         dc->white_curves = g_slist_remove(dc->white_curves, dc->white_curves->data);
 602     }
 603     while (dc->white_anchors) {
 604         sp_draw_anchor_destroy((SPDrawAnchor *) dc->white_anchors->data);
 605         dc->white_anchors = g_slist_remove(dc->white_anchors, dc->white_anchors->data);
 606     }
 607 }
 608
 609 static void
 610 spdc_free_colors(SPDrawContext *dc)
 611 {
 612     /* Red */
 613     if (dc->red_bpath) {
 614         gtk_object_destroy(GTK_OBJECT(dc->red_bpath));
 615         dc->red_bpath = NULL;
 616     }
 617     if (dc->red_curve) {
 618         dc->red_curve = sp_curve_unref(dc->red_curve);
 619     }
 620     /* Blue */
 621     if (dc->blue_bpath) {
 622         gtk_object_destroy(GTK_OBJECT(dc->blue_bpath));
 623         dc->blue_bpath = NULL;
 624     }
 625     if (dc->blue_curve) {
 626         dc->blue_curve = sp_curve_unref(dc->blue_curve);
 627     }
 628     /* Green */
 629     while (dc->green_bpaths) {
 630         gtk_object_destroy(GTK_OBJECT(dc->green_bpaths->data));
 631         dc->green_bpaths = g_slist_remove(dc->green_bpaths, dc->green_bpaths->data);
 632     }
 633     if (dc->green_curve) {
 634         dc->green_curve = sp_curve_unref(dc->green_curve);
 635     }
 636     if (dc->green_anchor) {
 637         dc->green_anchor = sp_draw_anchor_destroy(dc->green_anchor);
 638     }
 639     /* White */
 640     if (dc->white_item) {
 641         /* We do not hold refcount */
 642         dc->white_item = NULL;
 643     }
 644     while (dc->white_curves) {
 645         sp_curve_unref((SPCurve *) dc->white_curves->data);
 646         dc->white_curves = g_slist_remove(dc->white_curves, dc->white_curves->data);
 647     }
 648     while (dc->white_anchors) {
 649         sp_draw_anchor_destroy((SPDrawAnchor *) dc->white_anchors->data);
 650         dc->white_anchors = g_slist_remove(dc->white_anchors, dc->white_anchors->data);
 651     }
 652 }
 653
 654
 655 /*
 656   Local Variables:
 657   mode:c++
 658   c-file-style:"stroustrup"
 659   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 660   indent-tabs-mode:nil
 661   fill-column:99
 662   End:
 663 */
 664 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :