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 #include "live_effects/lpe-patternalongpath.h"
  45 #include "style.h"
  46
  47 static void sp_draw_context_class_init(SPDrawContextClass *klass);
  48 static void sp_draw_context_init(SPDrawContext *dc);
  49 static void sp_draw_context_dispose(GObject *object);
  50
  51 static void sp_draw_context_setup(SPEventContext *ec);
  52 static void sp_draw_context_set(SPEventContext *ec, gchar const *key, gchar const *value);
  53 static void sp_draw_context_finish(SPEventContext *ec);
  54
  55 static gint sp_draw_context_root_handler(SPEventContext *event_context, GdkEvent *event);
  56
  57 static void spdc_selection_changed(Inkscape::Selection *sel, SPDrawContext *dc);
  58 static void spdc_selection_modified(Inkscape::Selection *sel, guint flags, SPDrawContext *dc);
  59
  60 static void spdc_attach_selection(SPDrawContext *dc, Inkscape::Selection *sel);
  61
  62 static void spdc_flush_white(SPDrawContext *dc, SPCurve *gc);
  63
  64 static void spdc_reset_white(SPDrawContext *dc);
  65 static void spdc_free_colors(SPDrawContext *dc);
  66
  67
  68 static SPEventContextClass *draw_parent_class;
  69
  70
  71 GType
  72 sp_draw_context_get_type(void)
  73 {
  74     static GType type = 0;
  75     if (!type) {
  76         GTypeInfo info = {
  77             sizeof(SPDrawContextClass),
  78             NULL, NULL,
  79             (GClassInitFunc) sp_draw_context_class_init,
  80             NULL, NULL,
  81             sizeof(SPDrawContext),
  82             4,
  83             (GInstanceInitFunc) sp_draw_context_init,
  84             NULL,   /* value_table */
  85         };
  86         type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPDrawContext", &info, (GTypeFlags)0);
  87     }
  88     return type;
  89 }
  90
  91 static void
  92 sp_draw_context_class_init(SPDrawContextClass *klass)
  93 {
  94     GObjectClass *object_class;
  95     SPEventContextClass *ec_class;
  96
  97     object_class = (GObjectClass *)klass;
  98     ec_class = (SPEventContextClass *) klass;
  99
 100     draw_parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass);
 101
 102     object_class->dispose = sp_draw_context_dispose;
 103
 104     ec_class->setup = sp_draw_context_setup;
 105     ec_class->set = sp_draw_context_set;
 106     ec_class->finish = sp_draw_context_finish;
 107     ec_class->root_handler = sp_draw_context_root_handler;
 108 }
 109
 110 static void
 111 sp_draw_context_init(SPDrawContext *dc)
 112 {
 113     dc->attach = FALSE;
 114
 115     dc->red_color = 0xff00007f;
 116     dc->blue_color = 0x0000ff7f;
 117     dc->green_color = 0x00ff007f;
 118     dc->red_curve_is_valid = false;
 119
 120     dc->waiting_LPE_type = Inkscape::LivePathEffect::INVALID_LPE;
 121
 122     new (&dc->sel_changed_connection) sigc::connection();
 123     new (&dc->sel_modified_connection) sigc::connection();
 124 }
 125
 126 static void
 127 sp_draw_context_dispose(GObject *object)
 128 {
 129     SPDrawContext *dc = SP_DRAW_CONTEXT(object);
 130
 131     dc->sel_changed_connection.~connection();
 132     dc->sel_modified_connection.~connection();
 133
 134     if (dc->grab) {
 135         sp_canvas_item_ungrab(dc->grab, GDK_CURRENT_TIME);
 136         dc->grab = NULL;
 137     }
 138
 139     if (dc->selection) {
 140         dc->selection = NULL;
 141     }
 142
 143     dc->waiting_LPE_type = Inkscape::LivePathEffect::INVALID_LPE;
 144
 145     spdc_free_colors(dc);
 146
 147     G_OBJECT_CLASS(draw_parent_class)->dispose(object);
 148 }
 149
 150 static void
 151 sp_draw_context_setup(SPEventContext *ec)
 152 {
 153     SPDrawContext *dc = SP_DRAW_CONTEXT(ec);
 154     SPDesktop *dt = ec->desktop;
 155
 156     if (((SPEventContextClass *) draw_parent_class)->setup) {
 157         ((SPEventContextClass *) draw_parent_class)->setup(ec);
 158     }
 159
 160     dc->selection = sp_desktop_selection(dt);
 161
 162     /* Connect signals to track selection changes */
 163     dc->sel_changed_connection = dc->selection->connectChanged(
 164         sigc::bind(sigc::ptr_fun(&spdc_selection_changed), dc)
 165     );
 166     dc->sel_modified_connection = dc->selection->connectModified(
 167         sigc::bind(sigc::ptr_fun(&spdc_selection_modified), dc)
 168     );
 169
 170     /* Create red bpath */
 171     dc->red_bpath = sp_canvas_bpath_new(sp_desktop_sketch(ec->desktop), NULL);
 172     sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(dc->red_bpath), dc->red_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 173     /* Create red curve */
 174     dc->red_curve = new SPCurve(4);
 175
 176     /* Create blue bpath */
 177     dc->blue_bpath = sp_canvas_bpath_new(sp_desktop_sketch(ec->desktop), NULL);
 178     sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(dc->blue_bpath), dc->blue_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 179     /* Create blue curve */
 180     dc->blue_curve = new SPCurve(8);
 181
 182     /* Create green curve */
 183     dc->green_curve = new SPCurve(64);
 184     /* No green anchor by default */
 185     dc->green_anchor = NULL;
 186     dc->green_closed = FALSE;
 187
 188     dc->attach = TRUE;
 189     spdc_attach_selection(dc, dc->selection);
 190 }
 191
 192 static void
 193 sp_draw_context_finish(SPEventContext *ec)
 194 {
 195     SPDrawContext *dc = SP_DRAW_CONTEXT(ec);
 196
 197     dc->sel_changed_connection.disconnect();
 198     dc->sel_modified_connection.disconnect();
 199
 200     if (dc->grab) {
 201         sp_canvas_item_ungrab(dc->grab, GDK_CURRENT_TIME);
 202     }
 203
 204     if (dc->selection) {
 205         dc->selection = NULL;
 206     }
 207
 208     spdc_free_colors(dc);
 209 }
 210
 211 static void
 212 sp_draw_context_set(SPEventContext */*ec*/, const gchar */*key*/, const gchar */*value*/)
 213 {
 214 }
 215
 216 gint
 217 sp_draw_context_root_handler(SPEventContext *ec, GdkEvent *event)
 218 {
 219     gint ret = FALSE;
 220
 221     switch (event->type) {
 222         case GDK_KEY_PRESS:
 223             switch (get_group0_keyval (&event->key)) {
 224                 case GDK_Up:
 225                 case GDK_Down:
 226                 case GDK_KP_Up:
 227                 case GDK_KP_Down:
 228                     // prevent the zoom field from activation
 229                     if (!MOD__CTRL_ONLY) {
 230                         ret = TRUE;
 231                     }
 232                     break;
 233                 default:
 234             break;
 235         }
 236         break;
 237     default:
 238         break;
 239     }
 240
 241     if (!ret) {
 242         if (((SPEventContextClass *) draw_parent_class)->root_handler) {
 243             ret = ((SPEventContextClass *) draw_parent_class)->root_handler(ec, event);
 244         }
 245     }
 246
 247     return ret;
 248 }
 249
 250 static void
 251 spdc_paste_curve_as_param_path(const SPCurve *c, SPDrawContext *dc, SPItem *item)
 252 {
 253     using namespace Inkscape::LivePathEffect;
 254
 255     // TODO: Don't paste path if nothing is on the clipboard
 256
 257     Effect::createAndApply(Inkscape::LivePathEffect::PATTERN_ALONG_PATH, dc->desktop->doc(), item);
 258     Effect* lpe = sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item));
 259     gchar *svgd = sp_svg_write_path(c->get_pathvector());
 260     static_cast<LPEPatternAlongPath*>(lpe)->pattern.paste_param_path(svgd);
 261 }
 262
 263 /*
 264  * If we have an item and a waiting LPE, apply the effect to the item
 265  * (spiro spline mode is treated separately)
 266  */
 267 void
 268 spdc_check_for_and_apply_waiting_LPE(SPDrawContext *dc, SPItem *item)
 269 {
 270     using namespace Inkscape::LivePathEffect;
 271
 272     if (item) {
 273         if (prefs_get_int_attribute("tools.freehand", "spiro-spline-mode", 0)) {
 274             Effect::createAndApply(SPIRO, dc->desktop->doc(), item);
 275         }
 276
 277         int shape = prefs_get_int_attribute("tools.freehand", "shape", 0);
 278         bool shape_applied = false;
 279         SPCSSAttr *css_item = sp_css_attr_from_object (SP_OBJECT(item), SP_STYLE_FLAG_ALWAYS);
 280         const char *cstroke = sp_repr_css_property(css_item, "stroke", "none");
 281
 282         switch (shape) {
 283             case 0:
 284                 // don't apply any shape
 285                 break;
 286             case 1:
 287             {
 288                 // take shape from clipboard; TODO: catch the case where clipboard is empty
 289                 Effect::createAndApply(PATTERN_ALONG_PATH, dc->desktop->doc(), item);
 290                 Effect* lpe = sp_lpe_item_get_current_lpe(SP_LPE_ITEM(item));
 291                 static_cast<LPEPatternAlongPath*>(lpe)->pattern.on_paste_button_click();
 292
 293                 shape_applied = true;
 294                 break;
 295             }
 296             case 2:
 297             {
 298                 // "crescendo"
 299                 // TODO: this is only for illustration (we create a "crescendo"-shaped path
 300                 //       manually; eventually we should read the path from a separate file)
 301                 SPCurve *c = new SPCurve();
 302                 c->moveto(0,5);
 303                 c->lineto(200,10);
 304                 c->lineto(200,0);
 305                 c->closepath();
 306                 spdc_paste_curve_as_param_path(c, dc, item);
 307                 c->unref();
 308
 309                 shape_applied = true;
 310                 break;
 311             }
 312             case 3:
 313             {
 314                 // "decrescendo"
 315                 // TODO: this is only for illustration (we create a "decrescendo"-shaped path
 316                 //       manually; eventually we should read the path from a separate file)
 317                 SPCurve *c = new SPCurve();
 318                 c->moveto(0,0);
 319                 c->lineto(0,10);
 320                 c->lineto(200,5);
 321                 c->closepath();
 322                 spdc_paste_curve_as_param_path(c, dc, item);
 323                 c->unref();
 324
 325                 shape_applied = true;
 326                 break;
 327             }
 328             default:
 329                 break;
 330         }
 331         if (shape_applied) {
 332             // apply original stroke color as fill and unset stroke; then return
 333             SPCSSAttr *css = sp_repr_css_attr_new();
 334             sp_repr_css_set_property (css, "fill", cstroke);
 335             sp_repr_css_set_property (css, "stroke", "none");
 336             sp_desktop_apply_css_recursive(SP_OBJECT(item), css, true);
 337             sp_repr_css_attr_unref(css);
 338             return;
 339         }
 340
 341         if (dc->waiting_LPE_type != INVALID_LPE) {
 342             Effect::createAndApply(dc->waiting_LPE_type, dc->desktop->doc(), item);
 343             dc->waiting_LPE_type = INVALID_LPE;
 344         }
 345         if (SP_IS_PEN_CONTEXT(dc)) {
 346             SP_PEN_CONTEXT(dc)->polylines_only = false;
 347         }
 348     }
 349 }
 350
 351 /*
 352  * Selection handlers
 353  */
 354
 355 static void
 356 spdc_selection_changed(Inkscape::Selection *sel, SPDrawContext *dc)
 357 {
 358     // note: in draw context, selection_changed() is only called with a valid item as argument when
 359     // a new item was created; otherwise the following function call would yield wrong results
 360     spdc_check_for_and_apply_waiting_LPE(dc, sel->singleItem());
 361
 362     if (dc->attach) {
 363         spdc_attach_selection(dc, sel);
 364     }
 365 }
 366
 367 /* fixme: We have to ensure this is not delayed (Lauris) */
 368
 369 static void
 370 spdc_selection_modified(Inkscape::Selection *sel, guint /*flags*/, SPDrawContext *dc)
 371 {
 372     if (dc->attach) {
 373         spdc_attach_selection(dc, sel);
 374     }
 375 }
 376
 377 static void
 378 spdc_attach_selection(SPDrawContext *dc, Inkscape::Selection */*sel*/)
 379 {
 380     /* We reset white and forget white/start/end anchors */
 381     spdc_reset_white(dc);
 382     dc->sa = NULL;
 383     dc->ea = NULL;
 384
 385     SPItem *item = dc->selection ? dc->selection->singleItem() : NULL;
 386
 387     if ( item && SP_IS_PATH(item) ) {
 388         /* Create new white data */
 389         /* Item */
 390         dc->white_item = item;
 391         /* Curve list */
 392         /* We keep it in desktop coordinates to eliminate calculation errors */
 393         SPCurve *norm = sp_path_get_curve_for_edit (SP_PATH(item));
 394         norm->transform(from_2geom(sp_item_i2d_affine(dc->white_item)));
 395         g_return_if_fail( norm != NULL );
 396         dc->white_curves = g_slist_reverse(norm->split());
 397         norm->unref();
 398         /* Anchor list */
 399         for (GSList *l = dc->white_curves; l != NULL; l = l->next) {
 400             SPCurve *c;
 401             c = (SPCurve*)l->data;
 402             g_return_if_fail( c->get_length() > 1 );
 403             if ( !c->is_closed() ) {
 404                 SPDrawAnchor *a;
 405                 a = sp_draw_anchor_new(dc, c, TRUE, c->first_point());
 406                 dc->white_anchors = g_slist_prepend(dc->white_anchors, a);
 407                 a = sp_draw_anchor_new(dc, c, FALSE, c->last_point());
 408                 dc->white_anchors = g_slist_prepend(dc->white_anchors, a);
 409             }
 410         }
 411         /* fixme: recalculate active anchor? */
 412     }
 413 }
 414
 415
 416 /**
 417  *  Snaps node or handle to PI/rotationsnapsperpi degree increments.
 418  *
 419  *  \param dc draw context
 420  *  \param p cursor point (to be changed by snapping)
 421  *  \param o origin point
 422  *  \param state  keyboard state to check if ctrl was pressed
 423 */
 424
 425 void spdc_endpoint_snap_rotation(SPEventContext const *const ec, NR::Point &p, NR::Point const o,
 426                                  guint state)
 427 {
 428     /* Control must be down for this snap to work */
 429     if ((state & GDK_CONTROL_MASK) == 0) {
 430         return;
 431     }
 432
 433     unsigned const snaps = abs(prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12));
 434     /* 0 means no snapping. */
 435
 436     /* mirrored by fabs, so this corresponds to 15 degrees */
 437     NR::Point best; /* best solution */
 438     double bn = NR_HUGE; /* best normal */
 439     double bdot = 0;
 440     NR::Point v = NR::Point(0, 1);
 441     double const r00 = cos(M_PI / snaps), r01 = sin(M_PI / snaps);
 442     double const r10 = -r01, r11 = r00;
 443
 444     NR::Point delta = p - o;
 445
 446     for (unsigned i = 0; i < snaps; i++) {
 447         double const ndot = fabs(dot(v,NR::rot90(delta)));
 448         NR::Point t(r00*v[NR::X] + r01*v[NR::Y],
 449                     r10*v[NR::X] + r11*v[NR::Y]);
 450         if (ndot < bn) {
 451             /* I think it is better numerically to use the normal, rather than the dot product
 452              * to assess solutions, but I haven't proven it. */
 453             bn = ndot;
 454             best = v;
 455             bdot = dot(v, delta);
 456         }
 457         v = t;
 458     }
 459
 460     if (fabs(bdot) > 0) {
 461         p = o + bdot * best;
 462
 463         /* Snap it along best vector */
 464         SnapManager &m = SP_EVENT_CONTEXT_DESKTOP(ec)->namedview->snap_manager;
 465         m.setup(SP_EVENT_CONTEXT_DESKTOP(ec), NULL);
 466         m.constrainedSnapReturnByRef( Inkscape::Snapper::SNAPPOINT_NODE, p, Inkscape::Snapper::ConstraintLine(best));
 467     }
 468 }
 469
 470
 471 void spdc_endpoint_snap_free(SPEventContext const * const ec, NR::Point& p, guint const state)
 472 {
 473     /* Shift disables this snap */
 474     if (state & GDK_SHIFT_MASK) {
 475         return;
 476     }
 477
 478     SnapManager &m = SP_EVENT_CONTEXT_DESKTOP(ec)->namedview->snap_manager;
 479     m.setup(SP_EVENT_CONTEXT_DESKTOP(ec), NULL);
 480     m.freeSnapReturnByRef(Inkscape::Snapper::SNAPPOINT_NODE, p);
 481 }
 482
 483 static SPCurve *
 484 reverse_then_unref(SPCurve *orig)
 485 {
 486     SPCurve *ret = orig->create_reverse();
 487     orig->unref();
 488     return ret;
 489 }
 490
 491 /**
 492  * Concats red, blue and green.
 493  * If any anchors are defined, process these, optionally removing curves from white list
 494  * Invoke _flush_white to write result back to object.
 495  */
 496 void
 497 spdc_concat_colors_and_flush(SPDrawContext *dc, gboolean forceclosed)
 498 {
 499     /* Concat RBG */
 500     SPCurve *c = dc->green_curve;
 501
 502     /* Green */
 503     dc->green_curve = new SPCurve(64);
 504     while (dc->green_bpaths) {
 505         gtk_object_destroy(GTK_OBJECT(dc->green_bpaths->data));
 506         dc->green_bpaths = g_slist_remove(dc->green_bpaths, dc->green_bpaths->data);
 507     }
 508     /* Blue */
 509     c->append_continuous(dc->blue_curve, 0.0625);
 510     dc->blue_curve->reset();
 511     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(dc->blue_bpath), NULL);
 512     /* Red */
 513     if (dc->red_curve_is_valid) {
 514         c->append_continuous(dc->red_curve, 0.0625);
 515     }
 516     dc->red_curve->reset();
 517     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(dc->red_bpath), NULL);
 518
 519     if (c->is_empty()) {
 520         c->unref();
 521         return;
 522     }
 523
 524     /* Step A - test, whether we ended on green anchor */
 525     if ( forceclosed || ( dc->green_anchor && dc->green_anchor->active ) ) {
 526         // We hit green anchor, closing Green-Blue-Red
 527         SP_EVENT_CONTEXT_DESKTOP(dc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Path is closed."));
 528         c->closepath_current();
 529         /* Closed path, just flush */
 530         spdc_flush_white(dc, c);
 531         c->unref();
 532         return;
 533     }
 534
 535     /* Step B - both start and end anchored to same curve */
 536     if ( dc->sa && dc->ea
 537          && ( dc->sa->curve == dc->ea->curve )
 538          && ( ( dc->sa != dc->ea )
 539               || dc->sa->curve->is_closed() ) )
 540     {
 541         // We hit bot start and end of single curve, closing paths
 542         SP_EVENT_CONTEXT_DESKTOP(dc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Closing path."));
 543         if (dc->sa->start && !(dc->sa->curve->is_closed()) ) {
 544             c = reverse_then_unref(c);
 545         }
 546         dc->sa->curve->append_continuous(c, 0.0625);
 547         c->unref();
 548         dc->sa->curve->closepath_current();
 549         spdc_flush_white(dc, NULL);
 550         return;
 551     }
 552
 553     /* Step C - test start */
 554     if (dc->sa) {
 555         SPCurve *s = dc->sa->curve;
 556         dc->white_curves = g_slist_remove(dc->white_curves, s);
 557         if (dc->sa->start) {
 558             s = reverse_then_unref(s);
 559         }
 560         s->append_continuous(c, 0.0625);
 561         c->unref();
 562         c = s;
 563     } else /* Step D - test end */ if (dc->ea) {
 564         SPCurve *e = dc->ea->curve;
 565         dc->white_curves = g_slist_remove(dc->white_curves, e);
 566         if (!dc->ea->start) {
 567             e = reverse_then_unref(e);
 568         }
 569         c->append_continuous(e, 0.0625);
 570         e->unref();
 571     }
 572
 573
 574     spdc_flush_white(dc, c);
 575
 576     c->unref();
 577 }
 578
 579 static char const *
 580 tool_name(SPDrawContext *dc)
 581 {
 582     return ( SP_IS_PEN_CONTEXT(dc)
 583              ? "tools.freehand.pen"
 584              : "tools.freehand.pencil" );
 585 }
 586
 587 /*
 588  * Flushes white curve(s) and additional curve into object
 589  *
 590  * No cleaning of colored curves - this has to be done by caller
 591  * No rereading of white data, so if you cannot rely on ::modified, do it in caller
 592  *
 593  */
 594
 595 static void
 596 spdc_flush_white(SPDrawContext *dc, SPCurve *gc)
 597 {
 598     SPCurve *c;
 599
 600     if (dc->white_curves) {
 601         g_assert(dc->white_item);
 602         c = SPCurve::concat(dc->white_curves);
 603         g_slist_free(dc->white_curves);
 604         dc->white_curves = NULL;
 605         if (gc) {
 606             c->append(gc, FALSE);
 607         }
 608     } else if (gc) {
 609         c = gc;
 610         c->ref();
 611     } else {
 612         return;
 613     }
 614
 615     /* Now we have to go back to item coordinates at last */
 616     c->transform(( dc->white_item
 617                             ? from_2geom(sp_item_dt2i_affine(dc->white_item))
 618                             : sp_desktop_dt2root_affine(SP_EVENT_CONTEXT_DESKTOP(dc)) ));
 619
 620     SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(dc);
 621     SPDocument *doc = sp_desktop_document(desktop);
 622     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
 623
 624     if ( c && !c->is_empty() ) {
 625         /* We actually have something to write */
 626
 627         bool has_lpe = false;
 628         Inkscape::XML::Node *repr;
 629         if (dc->white_item) {
 630             repr = SP_OBJECT_REPR(dc->white_item);
 631             has_lpe = sp_lpe_item_has_path_effect_recursive(SP_LPE_ITEM(dc->white_item));
 632         } else {
 633             repr = xml_doc->createElement("svg:path");
 634             /* Set style */
 635             sp_desktop_apply_style_tool(desktop, repr, tool_name(dc), false);
 636         }
 637
 638         gchar *str = sp_svg_write_path( c->get_pathvector() );
 639         g_assert( str != NULL );
 640         if (has_lpe)
 641             repr->setAttribute("inkscape:original-d", str);
 642         else
 643             repr->setAttribute("d", str);
 644         g_free(str);
 645
 646         if (!dc->white_item) {
 647             /* Attach repr */
 648             SPItem *item = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr));
 649             dc->selection->set(repr);
 650             Inkscape::GC::release(repr);
 651             item->transform = from_2geom(i2i_affine(desktop->currentRoot(), desktop->currentLayer()));
 652             item->updateRepr();
 653         }
 654
 655         sp_document_done(doc, SP_IS_PEN_CONTEXT(dc)? SP_VERB_CONTEXT_PEN : SP_VERB_CONTEXT_PENCIL,
 656                          _("Draw path"));
 657
 658         // When quickly drawing several subpaths with Shift, the next subpath may be finished and
 659         // flushed before the selection_modified signal is fired by the previous change, which
 660         // results in the tool losing all of the selected path's curve except that last subpath. To
 661         // fix this, we force the selection_modified callback now, to make sure the tool's curve is
 662         // in sync immediately.
 663         spdc_selection_modified(sp_desktop_selection(desktop), 0, dc);
 664     }
 665
 666     c->unref();
 667
 668     /* Flush pending updates */
 669     sp_document_ensure_up_to_date(doc);
 670 }
 671
 672 /**
 673  * Returns FIRST active anchor (the activated one).
 674  */
 675 SPDrawAnchor *
 676 spdc_test_inside(SPDrawContext *dc, NR::Point p)
 677 {
 678     SPDrawAnchor *active = NULL;
 679
 680     /* Test green anchor */
 681     if (dc->green_anchor) {
 682         active = sp_draw_anchor_test(dc->green_anchor, p, TRUE);
 683     }
 684
 685     for (GSList *l = dc->white_anchors; l != NULL; l = l->next) {
 686         SPDrawAnchor *na = sp_draw_anchor_test((SPDrawAnchor *) l->data, p, !active);
 687         if ( !active && na ) {
 688             active = na;
 689         }
 690     }
 691
 692     return active;
 693 }
 694
 695 static void
 696 spdc_reset_white(SPDrawContext *dc)
 697 {
 698     if (dc->white_item) {
 699         /* We do not hold refcount */
 700         dc->white_item = NULL;
 701     }
 702     while (dc->white_curves) {
 703         reinterpret_cast<SPCurve *>(dc->white_curves->data)->unref();
 704         dc->white_curves = g_slist_remove(dc->white_curves, dc->white_curves->data);
 705     }
 706     while (dc->white_anchors) {
 707         sp_draw_anchor_destroy((SPDrawAnchor *) dc->white_anchors->data);
 708         dc->white_anchors = g_slist_remove(dc->white_anchors, dc->white_anchors->data);
 709     }
 710 }
 711
 712 static void
 713 spdc_free_colors(SPDrawContext *dc)
 714 {
 715     /* Red */
 716     if (dc->red_bpath) {
 717         gtk_object_destroy(GTK_OBJECT(dc->red_bpath));
 718         dc->red_bpath = NULL;
 719     }
 720     if (dc->red_curve) {
 721         dc->red_curve = dc->red_curve->unref();
 722     }
 723     /* Blue */
 724     if (dc->blue_bpath) {
 725         gtk_object_destroy(GTK_OBJECT(dc->blue_bpath));
 726         dc->blue_bpath = NULL;
 727     }
 728     if (dc->blue_curve) {
 729         dc->blue_curve = dc->blue_curve->unref();
 730     }
 731     /* Green */
 732     while (dc->green_bpaths) {
 733         gtk_object_destroy(GTK_OBJECT(dc->green_bpaths->data));
 734         dc->green_bpaths = g_slist_remove(dc->green_bpaths, dc->green_bpaths->data);
 735     }
 736     if (dc->green_curve) {
 737         dc->green_curve = dc->green_curve->unref();
 738     }
 739     if (dc->green_anchor) {
 740         dc->green_anchor = sp_draw_anchor_destroy(dc->green_anchor);
 741     }
 742     /* White */
 743     if (dc->white_item) {
 744         /* We do not hold refcount */
 745         dc->white_item = NULL;
 746     }
 747     while (dc->white_curves) {
 748         reinterpret_cast<SPCurve *>(dc->white_curves->data)->unref();
 749         dc->white_curves = g_slist_remove(dc->white_curves, dc->white_curves->data);
 750     }
 751     while (dc->white_anchors) {
 752         sp_draw_anchor_destroy((SPDrawAnchor *) dc->white_anchors->data);
 753         dc->white_anchors = g_slist_remove(dc->white_anchors, dc->white_anchors->data);
 754     }
 755 }
 756
 757
 758 /*
 759   Local Variables:
 760   mode:c++
 761   c-file-style:"stroustrup"
 762   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 763   indent-tabs-mode:nil
 764   fill-column:99
 765   End:
 766 */
 767 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :