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 #include "display/snap-indicator.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     new (&dc->sel_changed_connection) sigc::connection();
 119     new (&dc->sel_modified_connection) sigc::connection();
 120 }
 121
 122 static void
 123 sp_draw_context_dispose(GObject *object)
 124 {
 125     SPDrawContext *dc = SP_DRAW_CONTEXT(object);
 126
 127     dc->sel_changed_connection.~connection();
 128     dc->sel_modified_connection.~connection();
 129
 130     if (dc->grab) {
 131         sp_canvas_item_ungrab(dc->grab, GDK_CURRENT_TIME);
 132         dc->grab = NULL;
 133     }
 134
 135     if (dc->selection) {
 136         dc->selection = NULL;
 137     }
 138
 139     spdc_free_colors(dc);
 140
 141     G_OBJECT_CLASS(draw_parent_class)->dispose(object);
 142 }
 143
 144 static void
 145 sp_draw_context_setup(SPEventContext *ec)
 146 {
 147     SPDrawContext *dc = SP_DRAW_CONTEXT(ec);
 148     SPDesktop *dt = ec->desktop;
 149
 150     if (((SPEventContextClass *) draw_parent_class)->setup) {
 151         ((SPEventContextClass *) draw_parent_class)->setup(ec);
 152     }
 153
 154     dc->selection = sp_desktop_selection(dt);
 155
 156     /* Connect signals to track selection changes */
 157     dc->sel_changed_connection = dc->selection->connectChanged(
 158         sigc::bind(sigc::ptr_fun(&spdc_selection_changed), dc)
 159     );
 160     dc->sel_modified_connection = dc->selection->connectModified(
 161         sigc::bind(sigc::ptr_fun(&spdc_selection_modified), dc)
 162     );
 163
 164     /* Create red bpath */
 165     dc->red_bpath = sp_canvas_bpath_new(sp_desktop_sketch(ec->desktop), NULL);
 166     sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(dc->red_bpath), dc->red_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 167     /* Create red curve */
 168     dc->red_curve = sp_curve_new_sized(4);
 169
 170     /* Create blue bpath */
 171     dc->blue_bpath = sp_canvas_bpath_new(sp_desktop_sketch(ec->desktop), NULL);
 172     sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(dc->blue_bpath), dc->blue_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 173     /* Create blue curve */
 174     dc->blue_curve = sp_curve_new_sized(8);
 175
 176     /* Create green curve */
 177     dc->green_curve = sp_curve_new_sized(64);
 178     /* No green anchor by default */
 179     dc->green_anchor = NULL;
 180     dc->green_closed = FALSE;
 181
 182     dc->attach = TRUE;
 183     spdc_attach_selection(dc, dc->selection);
 184 }
 185
 186 static void
 187 sp_draw_context_finish(SPEventContext *ec)
 188 {
 189     SPDrawContext *dc = SP_DRAW_CONTEXT(ec);
 190
 191     dc->sel_changed_connection.disconnect();
 192     dc->sel_modified_connection.disconnect();
 193
 194     if (dc->grab) {
 195         sp_canvas_item_ungrab(dc->grab, GDK_CURRENT_TIME);
 196     }
 197
 198     if (dc->selection) {
 199         dc->selection = NULL;
 200     }
 201
 202     spdc_free_colors(dc);
 203 }
 204
 205 static void
 206 sp_draw_context_set(SPEventContext */*ec*/, const gchar */*key*/, const gchar */*value*/)
 207 {
 208 }
 209
 210 gint
 211 sp_draw_context_root_handler(SPEventContext *ec, GdkEvent *event)
 212 {
 213     gint ret = FALSE;
 214
 215     switch (event->type) {
 216         case GDK_KEY_PRESS:
 217             switch (get_group0_keyval (&event->key)) {
 218                 case GDK_Up:
 219                 case GDK_Down:
 220                 case GDK_KP_Up:
 221                 case GDK_KP_Down:
 222                     // prevent the zoom field from activation
 223                     if (!MOD__CTRL_ONLY) {
 224                         ret = TRUE;
 225                     }
 226                     break;
 227                 default:
 228             break;
 229         }
 230         break;
 231     default:
 232         break;
 233     }
 234
 235     if (!ret) {
 236         if (((SPEventContextClass *) draw_parent_class)->root_handler) {
 237             ret = ((SPEventContextClass *) draw_parent_class)->root_handler(ec, event);
 238         }
 239     }
 240
 241     return ret;
 242 }
 243
 244
 245 /*
 246  * Selection handlers
 247  */
 248
 249 static void
 250 spdc_selection_changed(Inkscape::Selection *sel, SPDrawContext *dc)
 251 {
 252     if (dc->attach) {
 253         spdc_attach_selection(dc, sel);
 254     }
 255 }
 256
 257 /* fixme: We have to ensure this is not delayed (Lauris) */
 258
 259 static void
 260 spdc_selection_modified(Inkscape::Selection *sel, guint /*flags*/, SPDrawContext *dc)
 261 {
 262     if (dc->attach) {
 263         spdc_attach_selection(dc, sel);
 264     }
 265 }
 266
 267 static void
 268 spdc_attach_selection(SPDrawContext *dc, Inkscape::Selection */*sel*/)
 269 {
 270     /* We reset white and forget white/start/end anchors */
 271     spdc_reset_white(dc);
 272     dc->sa = NULL;
 273     dc->ea = NULL;
 274
 275     SPItem *item = dc->selection ? dc->selection->singleItem() : NULL;
 276
 277     if ( item && SP_IS_PATH(item) ) {
 278         /* Create new white data */
 279         /* Item */
 280         dc->white_item = item;
 281         /* Curve list */
 282         /* We keep it in desktop coordinates to eliminate calculation errors */
 283         SPCurve *norm = sp_path_get_curve_for_edit (SP_PATH(item));
 284         sp_curve_transform(norm, sp_item_i2d_affine(dc->white_item));
 285         g_return_if_fail( norm != NULL );
 286         dc->white_curves = g_slist_reverse(sp_curve_split(norm));
 287         sp_curve_unref(norm);
 288         /* Anchor list */
 289         for (GSList *l = dc->white_curves; l != NULL; l = l->next) {
 290             SPCurve *c;
 291             c = (SPCurve*)l->data;
 292             g_return_if_fail( c->end > 1 );
 293             if ( SP_CURVE_BPATH(c)->code == NR_MOVETO_OPEN ) {
 294                 NArtBpath *s, *e;
 295                 SPDrawAnchor *a;
 296                 s = sp_curve_first_bpath(c);
 297                 e = sp_curve_last_bpath(c);
 298                 a = sp_draw_anchor_new(dc, c, TRUE, NR::Point(s->x3, s->y3));
 299                 dc->white_anchors = g_slist_prepend(dc->white_anchors, a);
 300                 a = sp_draw_anchor_new(dc, c, FALSE, NR::Point(e->x3, e->y3));
 301                 dc->white_anchors = g_slist_prepend(dc->white_anchors, a);
 302             }
 303         }
 304         /* fixme: recalculate active anchor? */
 305     }
 306 }
 307
 308
 309 /**
 310  *  Snaps node or handle to PI/rotationsnapsperpi degree increments.
 311  *
 312  *  \param dc draw context
 313  *  \param p cursor point (to be changed by snapping)
 314  *  \param o origin point
 315  *  \param state  keyboard state to check if ctrl was pressed
 316 */
 317
 318 void spdc_endpoint_snap_rotation(SPEventContext const *const ec, NR::Point &p, NR::Point const o,
 319                                  guint state)
 320 {
 321     /* Control must be down for this snap to work */
 322     if ((state & GDK_CONTROL_MASK) == 0) {
 323         return;
 324     }
 325
 326     unsigned const snaps = abs(prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12));
 327     /* 0 means no snapping. */
 328
 329     /* mirrored by fabs, so this corresponds to 15 degrees */
 330     NR::Point best; /* best solution */
 331     double bn = NR_HUGE; /* best normal */
 332     double bdot = 0;
 333     NR::Point v = NR::Point(0, 1);
 334     double const r00 = cos(M_PI / snaps), r01 = sin(M_PI / snaps);
 335     double const r10 = -r01, r11 = r00;
 336
 337     NR::Point delta = p - o;
 338
 339     for (unsigned i = 0; i < snaps; i++) {
 340         double const ndot = fabs(dot(v,NR::rot90(delta)));
 341         NR::Point t(r00*v[NR::X] + r01*v[NR::Y],
 342                     r10*v[NR::X] + r11*v[NR::Y]);
 343         if (ndot < bn) {
 344             /* I think it is better numerically to use the normal, rather than the dot product
 345              * to assess solutions, but I haven't proven it. */
 346             bn = ndot;
 347             best = v;
 348             bdot = dot(v, delta);
 349         }
 350         v = t;
 351     }
 352
 353     if (fabs(bdot) > 0) {
 354         p = o + bdot * best;
 355
 356         /* Snap it along best vector */
 357         SnapManager const &m = SP_EVENT_CONTEXT_DESKTOP(ec)->namedview->snap_manager;
 358         Inkscape::SnappedPoint const s = m.constrainedSnap( Inkscape::Snapper::SNAPPOINT_NODE,
 359                                                             p, Inkscape::Snapper::ConstraintLine(best), NULL );
 360         p = s.getPoint();
 361         if (s.getDistance() < NR_HUGE) {
 362             SP_EVENT_CONTEXT_DESKTOP(ec)->snapindicator->set_new_snappoint(p.to_2geom());
 363         }
 364     }
 365 }
 366
 367
 368 void spdc_endpoint_snap_free(SPEventContext const * const ec, NR::Point& p, guint const state)
 369 {
 370     /* Shift disables this snap */
 371     if (state & GDK_SHIFT_MASK) {
 372         return;
 373     }
 374
 375     SnapManager const &m = SP_EVENT_CONTEXT_DESKTOP(ec)->namedview->snap_manager;
 376     Inkscape::SnappedPoint const s = m.freeSnap(Inkscape::Snapper::SNAPPOINT_NODE, p, NULL);
 377     p = s.getPoint();
 378     if (s.getDistance() < NR_HUGE) {
 379         SP_EVENT_CONTEXT_DESKTOP(ec)->snapindicator->set_new_snappoint(p.to_2geom());
 380     }
 381 }
 382
 383 static SPCurve *
 384 reverse_then_unref(SPCurve *orig)
 385 {
 386     SPCurve *ret = sp_curve_reverse(orig);
 387     sp_curve_unref(orig);
 388     return ret;
 389 }
 390
 391 /**
 392  * Concats red, blue and green.
 393  * If any anchors are defined, process these, optionally removing curves from white list
 394  * Invoke _flush_white to write result back to object.
 395  */
 396 void
 397 spdc_concat_colors_and_flush(SPDrawContext *dc, gboolean forceclosed)
 398 {
 399     /* Concat RBG */
 400     SPCurve *c = dc->green_curve;
 401
 402     /* Green */
 403     dc->green_curve = sp_curve_new_sized(64);
 404     while (dc->green_bpaths) {
 405         gtk_object_destroy(GTK_OBJECT(dc->green_bpaths->data));
 406         dc->green_bpaths = g_slist_remove(dc->green_bpaths, dc->green_bpaths->data);
 407     }
 408     /* Blue */
 409     sp_curve_append_continuous(c, dc->blue_curve, 0.0625);
 410     sp_curve_reset(dc->blue_curve);
 411     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(dc->blue_bpath), NULL);
 412     /* Red */
 413     if (dc->red_curve_is_valid) {
 414         sp_curve_append_continuous(c, dc->red_curve, 0.0625);
 415     }
 416     sp_curve_reset(dc->red_curve);
 417     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(dc->red_bpath), NULL);
 418
 419     if (sp_curve_empty(c)) {
 420         sp_curve_unref(c);
 421         return;
 422     }
 423
 424     /* Step A - test, whether we ended on green anchor */
 425     if ( forceclosed || ( dc->green_anchor && dc->green_anchor->active ) ) {
 426         // We hit green anchor, closing Green-Blue-Red
 427         SP_EVENT_CONTEXT_DESKTOP(dc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Path is closed."));
 428         sp_curve_closepath_current(c);
 429         /* Closed path, just flush */
 430         spdc_flush_white(dc, c);
 431         sp_curve_unref(c);
 432         return;
 433     }
 434
 435     /* Step B - both start and end anchored to same curve */
 436     if ( dc->sa && dc->ea
 437          && ( dc->sa->curve == dc->ea->curve )
 438          && ( ( dc->sa != dc->ea )
 439               || dc->sa->curve->closed ) )
 440     {
 441         // We hit bot start and end of single curve, closing paths
 442         SP_EVENT_CONTEXT_DESKTOP(dc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Closing path."));
 443         if (dc->sa->start && !(dc->sa->curve->closed) ) {
 444             c = reverse_then_unref(c);
 445         }
 446         sp_curve_append_continuous(dc->sa->curve, c, 0.0625);
 447         sp_curve_unref(c);
 448         sp_curve_closepath_current(dc->sa->curve);
 449         spdc_flush_white(dc, NULL);
 450         return;
 451     }
 452
 453     /* Step C - test start */
 454     if (dc->sa) {
 455         SPCurve *s = dc->sa->curve;
 456         dc->white_curves = g_slist_remove(dc->white_curves, s);
 457         if (dc->sa->start) {
 458             s = reverse_then_unref(s);
 459         }
 460         sp_curve_append_continuous(s, c, 0.0625);
 461         sp_curve_unref(c);
 462         c = s;
 463     } else /* Step D - test end */ if (dc->ea) {
 464         SPCurve *e = dc->ea->curve;
 465         dc->white_curves = g_slist_remove(dc->white_curves, e);
 466         if (!dc->ea->start) {
 467             e = reverse_then_unref(e);
 468         }
 469         sp_curve_append_continuous(c, e, 0.0625);
 470         sp_curve_unref(e);
 471     }
 472
 473
 474     spdc_flush_white(dc, c);
 475
 476     sp_curve_unref(c);
 477 }
 478
 479 static char const *
 480 tool_name(SPDrawContext *dc)
 481 {
 482     return ( SP_IS_PEN_CONTEXT(dc)
 483              ? "tools.freehand.pen"
 484              : "tools.freehand.pencil" );
 485 }
 486
 487 /*
 488  * Flushes white curve(s) and additional curve into object
 489  *
 490  * No cleaning of colored curves - this has to be done by caller
 491  * No rereading of white data, so if you cannot rely on ::modified, do it in caller
 492  *
 493  */
 494
 495 static void
 496 spdc_flush_white(SPDrawContext *dc, SPCurve *gc)
 497 {
 498     SPCurve *c;
 499
 500     if (dc->white_curves) {
 501         g_assert(dc->white_item);
 502         c = sp_curve_concat(dc->white_curves);
 503         g_slist_free(dc->white_curves);
 504         dc->white_curves = NULL;
 505         if (gc) {
 506             sp_curve_append(c, gc, FALSE);
 507         }
 508     } else if (gc) {
 509         c = gc;
 510         sp_curve_ref(c);
 511     } else {
 512         return;
 513     }
 514
 515     /* Now we have to go back to item coordinates at last */
 516     sp_curve_transform(c, ( dc->white_item
 517                             ? sp_item_dt2i_affine(dc->white_item)
 518                             : sp_desktop_dt2root_affine(SP_EVENT_CONTEXT_DESKTOP(dc)) ));
 519
 520     SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(dc);
 521     SPDocument *doc = sp_desktop_document(desktop);
 522     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
 523
 524     if ( c && !sp_curve_empty(c) ) {
 525         /* We actually have something to write */
 526
 527         bool has_lpe = false;
 528         Inkscape::XML::Node *repr;
 529         if (dc->white_item) {
 530             repr = SP_OBJECT_REPR(dc->white_item);
 531             has_lpe = sp_lpe_item_has_path_effect_recursive(SP_LPE_ITEM(dc->white_item));
 532         } else {
 533             repr = xml_doc->createElement("svg:path");
 534             /* Set style */
 535             sp_desktop_apply_style_tool(desktop, repr, tool_name(dc), false);
 536         }
 537
 538         gchar *str = sp_svg_write_path(SP_CURVE_BPATH(c));
 539         g_assert( str != NULL );
 540         if (has_lpe)
 541             repr->setAttribute("inkscape:original-d", str);
 542         else
 543             repr->setAttribute("d", str);
 544         g_free(str);
 545
 546         if (!dc->white_item) {
 547             /* Attach repr */
 548             SPItem *item = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr));
 549             dc->selection->set(repr);
 550             Inkscape::GC::release(repr);
 551             item->transform = i2i_affine(desktop->currentRoot(), desktop->currentLayer());
 552             item->updateRepr();
 553         }
 554
 555         sp_document_done(doc, SP_IS_PEN_CONTEXT(dc)? SP_VERB_CONTEXT_PEN : SP_VERB_CONTEXT_PENCIL,
 556                          _("Draw path"));
 557
 558         // When quickly drawing several subpaths with Shift, the next subpath may be finished and
 559         // flushed before the selection_modified signal is fired by the previous change, which
 560         // results in the tool losing all of the selected path's curve except that last subpath. To
 561         // fix this, we force the selection_modified callback now, to make sure the tool's curve is
 562         // in sync immediately.
 563         spdc_selection_modified(sp_desktop_selection(desktop), 0, dc);
 564     }
 565
 566     sp_curve_unref(c);
 567
 568     /* Flush pending updates */
 569     sp_document_ensure_up_to_date(doc);
 570 }
 571
 572 /**
 573  * Returns FIRST active anchor (the activated one).
 574  */
 575 SPDrawAnchor *
 576 spdc_test_inside(SPDrawContext *dc, NR::Point p)
 577 {
 578     SPDrawAnchor *active = NULL;
 579
 580     /* Test green anchor */
 581     if (dc->green_anchor) {
 582         active = sp_draw_anchor_test(dc->green_anchor, p, TRUE);
 583     }
 584
 585     for (GSList *l = dc->white_anchors; l != NULL; l = l->next) {
 586         SPDrawAnchor *na = sp_draw_anchor_test((SPDrawAnchor *) l->data, p, !active);
 587         if ( !active && na ) {
 588             active = na;
 589         }
 590     }
 591
 592     return active;
 593 }
 594
 595 static void
 596 spdc_reset_white(SPDrawContext *dc)
 597 {
 598     if (dc->white_item) {
 599         /* We do not hold refcount */
 600         dc->white_item = NULL;
 601     }
 602     while (dc->white_curves) {
 603         sp_curve_unref((SPCurve *) dc->white_curves->data);
 604         dc->white_curves = g_slist_remove(dc->white_curves, dc->white_curves->data);
 605     }
 606     while (dc->white_anchors) {
 607         sp_draw_anchor_destroy((SPDrawAnchor *) dc->white_anchors->data);
 608         dc->white_anchors = g_slist_remove(dc->white_anchors, dc->white_anchors->data);
 609     }
 610 }
 611
 612 static void
 613 spdc_free_colors(SPDrawContext *dc)
 614 {
 615     /* Red */
 616     if (dc->red_bpath) {
 617         gtk_object_destroy(GTK_OBJECT(dc->red_bpath));
 618         dc->red_bpath = NULL;
 619     }
 620     if (dc->red_curve) {
 621         dc->red_curve = sp_curve_unref(dc->red_curve);
 622     }
 623     /* Blue */
 624     if (dc->blue_bpath) {
 625         gtk_object_destroy(GTK_OBJECT(dc->blue_bpath));
 626         dc->blue_bpath = NULL;
 627     }
 628     if (dc->blue_curve) {
 629         dc->blue_curve = sp_curve_unref(dc->blue_curve);
 630     }
 631     /* Green */
 632     while (dc->green_bpaths) {
 633         gtk_object_destroy(GTK_OBJECT(dc->green_bpaths->data));
 634         dc->green_bpaths = g_slist_remove(dc->green_bpaths, dc->green_bpaths->data);
 635     }
 636     if (dc->green_curve) {
 637         dc->green_curve = sp_curve_unref(dc->green_curve);
 638     }
 639     if (dc->green_anchor) {
 640         dc->green_anchor = sp_draw_anchor_destroy(dc->green_anchor);
 641     }
 642     /* White */
 643     if (dc->white_item) {
 644         /* We do not hold refcount */
 645         dc->white_item = NULL;
 646     }
 647     while (dc->white_curves) {
 648         sp_curve_unref((SPCurve *) dc->white_curves->data);
 649         dc->white_curves = g_slist_remove(dc->white_curves, dc->white_curves->data);
 650     }
 651     while (dc->white_anchors) {
 652         sp_draw_anchor_destroy((SPDrawAnchor *) dc->white_anchors->data);
 653         dc->white_anchors = g_slist_remove(dc->white_anchors, dc->white_anchors->data);
 654     }
 655 }
 656
 657
 658 /*
 659   Local Variables:
 660   mode:c++
 661   c-file-style:"stroustrup"
 662   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 663   indent-tabs-mode:nil
 664   fill-column:99
 665   End:
 666 */
 667 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :