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     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 = new SPCurve(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 = new SPCurve(8);
 175
 176     /* Create green curve */
 177     dc->green_curve = new SPCurve(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         norm->transform(sp_item_i2d_affine(dc->white_item));
 285         g_return_if_fail( norm != NULL );
 286         dc->white_curves = g_slist_reverse(norm->split());
 287         norm->unref();
 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 = c->first_bpath();
 297                 e = c->last_bpath();
 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 &m = SP_EVENT_CONTEXT_DESKTOP(ec)->namedview->snap_manager;
 358         m.setup(SP_EVENT_CONTEXT_DESKTOP(ec), NULL);
 359         m.constrainedSnapReturnByRef( Inkscape::Snapper::SNAPPOINT_NODE, p, Inkscape::Snapper::ConstraintLine(best));
 360     }
 361 }
 362
 363
 364 void spdc_endpoint_snap_free(SPEventContext const * const ec, NR::Point& p, guint const state)
 365 {
 366     /* Shift disables this snap */
 367     if (state & GDK_SHIFT_MASK) {
 368         return;
 369     }
 370
 371     SnapManager &m = SP_EVENT_CONTEXT_DESKTOP(ec)->namedview->snap_manager;
 372     m.setup(SP_EVENT_CONTEXT_DESKTOP(ec), NULL);
 373     m.freeSnapReturnByRef(Inkscape::Snapper::SNAPPOINT_NODE, p);
 374 }
 375
 376 static SPCurve *
 377 reverse_then_unref(SPCurve *orig)
 378 {
 379     SPCurve *ret = orig->create_reverse();
 380     orig->unref();
 381     return ret;
 382 }
 383
 384 /**
 385  * Concats red, blue and green.
 386  * If any anchors are defined, process these, optionally removing curves from white list
 387  * Invoke _flush_white to write result back to object.
 388  */
 389 void
 390 spdc_concat_colors_and_flush(SPDrawContext *dc, gboolean forceclosed)
 391 {
 392     /* Concat RBG */
 393     SPCurve *c = dc->green_curve;
 394
 395     /* Green */
 396     dc->green_curve = new SPCurve(64);
 397     while (dc->green_bpaths) {
 398         gtk_object_destroy(GTK_OBJECT(dc->green_bpaths->data));
 399         dc->green_bpaths = g_slist_remove(dc->green_bpaths, dc->green_bpaths->data);
 400     }
 401     /* Blue */
 402     c->append_continuous(dc->blue_curve, 0.0625);
 403     dc->blue_curve->reset();
 404     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(dc->blue_bpath), NULL);
 405     /* Red */
 406     if (dc->red_curve_is_valid) {
 407         c->append_continuous(dc->red_curve, 0.0625);
 408     }
 409     dc->red_curve->reset();
 410     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(dc->red_bpath), NULL);
 411
 412     if (c->is_empty()) {
 413         c->unref();
 414         return;
 415     }
 416
 417     /* Step A - test, whether we ended on green anchor */
 418     if ( forceclosed || ( dc->green_anchor && dc->green_anchor->active ) ) {
 419         // We hit green anchor, closing Green-Blue-Red
 420         SP_EVENT_CONTEXT_DESKTOP(dc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Path is closed."));
 421         c->closepath_current();
 422         /* Closed path, just flush */
 423         spdc_flush_white(dc, c);
 424         c->unref();
 425         return;
 426     }
 427
 428     /* Step B - both start and end anchored to same curve */
 429     if ( dc->sa && dc->ea
 430          && ( dc->sa->curve == dc->ea->curve )
 431          && ( ( dc->sa != dc->ea )
 432               || dc->sa->curve->is_closed() ) )
 433     {
 434         // We hit bot start and end of single curve, closing paths
 435         SP_EVENT_CONTEXT_DESKTOP(dc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Closing path."));
 436         if (dc->sa->start && !(dc->sa->curve->is_closed()) ) {
 437             c = reverse_then_unref(c);
 438         }
 439         dc->sa->curve->append_continuous(c, 0.0625);
 440         c->unref();
 441         dc->sa->curve->closepath_current();
 442         spdc_flush_white(dc, NULL);
 443         return;
 444     }
 445
 446     /* Step C - test start */
 447     if (dc->sa) {
 448         SPCurve *s = dc->sa->curve;
 449         dc->white_curves = g_slist_remove(dc->white_curves, s);
 450         if (dc->sa->start) {
 451             s = reverse_then_unref(s);
 452         }
 453         s->append_continuous(c, 0.0625);
 454         c->unref();
 455         c = s;
 456     } else /* Step D - test end */ if (dc->ea) {
 457         SPCurve *e = dc->ea->curve;
 458         dc->white_curves = g_slist_remove(dc->white_curves, e);
 459         if (!dc->ea->start) {
 460             e = reverse_then_unref(e);
 461         }
 462         c->append_continuous(e, 0.0625);
 463         e->unref();
 464     }
 465
 466
 467     spdc_flush_white(dc, c);
 468
 469     c->unref();
 470 }
 471
 472 static char const *
 473 tool_name(SPDrawContext *dc)
 474 {
 475     return ( SP_IS_PEN_CONTEXT(dc)
 476              ? "tools.freehand.pen"
 477              : "tools.freehand.pencil" );
 478 }
 479
 480 /*
 481  * Flushes white curve(s) and additional curve into object
 482  *
 483  * No cleaning of colored curves - this has to be done by caller
 484  * No rereading of white data, so if you cannot rely on ::modified, do it in caller
 485  *
 486  */
 487
 488 static void
 489 spdc_flush_white(SPDrawContext *dc, SPCurve *gc)
 490 {
 491     SPCurve *c;
 492
 493     if (dc->white_curves) {
 494         g_assert(dc->white_item);
 495         c = SPCurve::concat(dc->white_curves);
 496         g_slist_free(dc->white_curves);
 497         dc->white_curves = NULL;
 498         if (gc) {
 499             c->append(gc, FALSE);
 500         }
 501     } else if (gc) {
 502         c = gc;
 503         c->ref();
 504     } else {
 505         return;
 506     }
 507
 508     /* Now we have to go back to item coordinates at last */
 509     c->transform(( dc->white_item
 510                             ? sp_item_dt2i_affine(dc->white_item)
 511                             : sp_desktop_dt2root_affine(SP_EVENT_CONTEXT_DESKTOP(dc)) ));
 512
 513     SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(dc);
 514     SPDocument *doc = sp_desktop_document(desktop);
 515     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
 516
 517     if ( c && !c->is_empty() ) {
 518         /* We actually have something to write */
 519
 520         bool has_lpe = false;
 521         Inkscape::XML::Node *repr;
 522         if (dc->white_item) {
 523             repr = SP_OBJECT_REPR(dc->white_item);
 524             has_lpe = sp_lpe_item_has_path_effect_recursive(SP_LPE_ITEM(dc->white_item));
 525         } else {
 526             repr = xml_doc->createElement("svg:path");
 527             /* Set style */
 528             sp_desktop_apply_style_tool(desktop, repr, tool_name(dc), false);
 529         }
 530
 531         gchar *str = sp_svg_write_path(SP_CURVE_BPATH(c));
 532         g_assert( str != NULL );
 533         if (has_lpe)
 534             repr->setAttribute("inkscape:original-d", str);
 535         else
 536             repr->setAttribute("d", str);
 537         g_free(str);
 538
 539         if (!dc->white_item) {
 540             /* Attach repr */
 541             SPItem *item = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr));
 542             dc->selection->set(repr);
 543             Inkscape::GC::release(repr);
 544             item->transform = i2i_affine(desktop->currentRoot(), desktop->currentLayer());
 545             item->updateRepr();
 546         }
 547
 548         sp_document_done(doc, SP_IS_PEN_CONTEXT(dc)? SP_VERB_CONTEXT_PEN : SP_VERB_CONTEXT_PENCIL,
 549                          _("Draw path"));
 550
 551         // When quickly drawing several subpaths with Shift, the next subpath may be finished and
 552         // flushed before the selection_modified signal is fired by the previous change, which
 553         // results in the tool losing all of the selected path's curve except that last subpath. To
 554         // fix this, we force the selection_modified callback now, to make sure the tool's curve is
 555         // in sync immediately.
 556         spdc_selection_modified(sp_desktop_selection(desktop), 0, dc);
 557     }
 558
 559     c->unref();
 560
 561     /* Flush pending updates */
 562     sp_document_ensure_up_to_date(doc);
 563 }
 564
 565 /**
 566  * Returns FIRST active anchor (the activated one).
 567  */
 568 SPDrawAnchor *
 569 spdc_test_inside(SPDrawContext *dc, NR::Point p)
 570 {
 571     SPDrawAnchor *active = NULL;
 572
 573     /* Test green anchor */
 574     if (dc->green_anchor) {
 575         active = sp_draw_anchor_test(dc->green_anchor, p, TRUE);
 576     }
 577
 578     for (GSList *l = dc->white_anchors; l != NULL; l = l->next) {
 579         SPDrawAnchor *na = sp_draw_anchor_test((SPDrawAnchor *) l->data, p, !active);
 580         if ( !active && na ) {
 581             active = na;
 582         }
 583     }
 584
 585     return active;
 586 }
 587
 588 static void
 589 spdc_reset_white(SPDrawContext *dc)
 590 {
 591     if (dc->white_item) {
 592         /* We do not hold refcount */
 593         dc->white_item = NULL;
 594     }
 595     while (dc->white_curves) {
 596         reinterpret_cast<SPCurve *>(dc->white_curves->data)->unref();
 597         dc->white_curves = g_slist_remove(dc->white_curves, dc->white_curves->data);
 598     }
 599     while (dc->white_anchors) {
 600         sp_draw_anchor_destroy((SPDrawAnchor *) dc->white_anchors->data);
 601         dc->white_anchors = g_slist_remove(dc->white_anchors, dc->white_anchors->data);
 602     }
 603 }
 604
 605 static void
 606 spdc_free_colors(SPDrawContext *dc)
 607 {
 608     /* Red */
 609     if (dc->red_bpath) {
 610         gtk_object_destroy(GTK_OBJECT(dc->red_bpath));
 611         dc->red_bpath = NULL;
 612     }
 613     if (dc->red_curve) {
 614         dc->red_curve = dc->red_curve->unref();
 615     }
 616     /* Blue */
 617     if (dc->blue_bpath) {
 618         gtk_object_destroy(GTK_OBJECT(dc->blue_bpath));
 619         dc->blue_bpath = NULL;
 620     }
 621     if (dc->blue_curve) {
 622         dc->blue_curve = dc->blue_curve->unref();
 623     }
 624     /* Green */
 625     while (dc->green_bpaths) {
 626         gtk_object_destroy(GTK_OBJECT(dc->green_bpaths->data));
 627         dc->green_bpaths = g_slist_remove(dc->green_bpaths, dc->green_bpaths->data);
 628     }
 629     if (dc->green_curve) {
 630         dc->green_curve = dc->green_curve->unref();
 631     }
 632     if (dc->green_anchor) {
 633         dc->green_anchor = sp_draw_anchor_destroy(dc->green_anchor);
 634     }
 635     /* White */
 636     if (dc->white_item) {
 637         /* We do not hold refcount */
 638         dc->white_item = NULL;
 639     }
 640     while (dc->white_curves) {
 641         reinterpret_cast<SPCurve *>(dc->white_curves->data)->unref();
 642         dc->white_curves = g_slist_remove(dc->white_curves, dc->white_curves->data);
 643     }
 644     while (dc->white_anchors) {
 645         sp_draw_anchor_destroy((SPDrawAnchor *) dc->white_anchors->data);
 646         dc->white_anchors = g_slist_remove(dc->white_anchors, dc->white_anchors->data);
 647     }
 648 }
 649
 650
 651 /*
 652   Local Variables:
 653   mode:c++
 654   c-file-style:"stroustrup"
 655   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 656   indent-tabs-mode:nil
 657   fill-column:99
 658   End:
 659 */
 660 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :