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_freehand_shape(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::FREEHAND_SHAPE, 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 && SP_IS_LPE_ITEM(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(FREEHAND_SHAPE, 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_freehand_shape(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_freehand_shape(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     if (dc->attach) {
 359         spdc_attach_selection(dc, sel);
 360     }
 361 }
 362
 363 /* fixme: We have to ensure this is not delayed (Lauris) */
 364
 365 static void
 366 spdc_selection_modified(Inkscape::Selection *sel, guint /*flags*/, SPDrawContext *dc)
 367 {
 368     if (dc->attach) {
 369         spdc_attach_selection(dc, sel);
 370     }
 371 }
 372
 373 static void
 374 spdc_attach_selection(SPDrawContext *dc, Inkscape::Selection */*sel*/)
 375 {
 376     /* We reset white and forget white/start/end anchors */
 377     spdc_reset_white(dc);
 378     dc->sa = NULL;
 379     dc->ea = NULL;
 380
 381     SPItem *item = dc->selection ? dc->selection->singleItem() : NULL;
 382
 383     if ( item && SP_IS_PATH(item) ) {
 384         /* Create new white data */
 385         /* Item */
 386         dc->white_item = item;
 387         /* Curve list */
 388         /* We keep it in desktop coordinates to eliminate calculation errors */
 389         SPCurve *norm = sp_path_get_curve_for_edit (SP_PATH(item));
 390         norm->transform(from_2geom(sp_item_i2d_affine(dc->white_item)));
 391         g_return_if_fail( norm != NULL );
 392         dc->white_curves = g_slist_reverse(norm->split());
 393         norm->unref();
 394         /* Anchor list */
 395         for (GSList *l = dc->white_curves; l != NULL; l = l->next) {
 396             SPCurve *c;
 397             c = (SPCurve*)l->data;
 398             g_return_if_fail( c->get_segment_count() > 0 );
 399             if ( !c->is_closed() ) {
 400                 SPDrawAnchor *a;
 401                 a = sp_draw_anchor_new(dc, c, TRUE, c->first_point());
 402                 dc->white_anchors = g_slist_prepend(dc->white_anchors, a);
 403                 a = sp_draw_anchor_new(dc, c, FALSE, c->last_point());
 404                 dc->white_anchors = g_slist_prepend(dc->white_anchors, a);
 405             }
 406         }
 407         /* fixme: recalculate active anchor? */
 408     }
 409 }
 410
 411
 412 /**
 413  *  Snaps node or handle to PI/rotationsnapsperpi degree increments.
 414  *
 415  *  \param dc draw context
 416  *  \param p cursor point (to be changed by snapping)
 417  *  \param o origin point
 418  *  \param state  keyboard state to check if ctrl was pressed
 419 */
 420
 421 void spdc_endpoint_snap_rotation(SPEventContext const *const ec, NR::Point &p, NR::Point const o,
 422                                  guint state)
 423 {
 424     /* Control must be down for this snap to work */
 425     if ((state & GDK_CONTROL_MASK) == 0) {
 426         return;
 427     }
 428
 429     unsigned const snaps = abs(prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12));
 430     /* 0 means no snapping. */
 431
 432     /* mirrored by fabs, so this corresponds to 15 degrees */
 433     NR::Point best; /* best solution */
 434     double bn = NR_HUGE; /* best normal */
 435     double bdot = 0;
 436     NR::Point v = NR::Point(0, 1);
 437     double const r00 = cos(M_PI / snaps), r01 = sin(M_PI / snaps);
 438     double const r10 = -r01, r11 = r00;
 439
 440     NR::Point delta = p - o;
 441
 442     for (unsigned i = 0; i < snaps; i++) {
 443         double const ndot = fabs(dot(v,NR::rot90(delta)));
 444         NR::Point t(r00*v[NR::X] + r01*v[NR::Y],
 445                     r10*v[NR::X] + r11*v[NR::Y]);
 446         if (ndot < bn) {
 447             /* I think it is better numerically to use the normal, rather than the dot product
 448              * to assess solutions, but I haven't proven it. */
 449             bn = ndot;
 450             best = v;
 451             bdot = dot(v, delta);
 452         }
 453         v = t;
 454     }
 455
 456     if (fabs(bdot) > 0) {
 457         p = o + bdot * best;
 458
 459         /* Snap it along best vector */
 460         SnapManager &m = SP_EVENT_CONTEXT_DESKTOP(ec)->namedview->snap_manager;
 461         m.setup(SP_EVENT_CONTEXT_DESKTOP(ec), NULL);
 462         m.constrainedSnapReturnByRef( Inkscape::Snapper::SNAPPOINT_NODE, p, Inkscape::Snapper::ConstraintLine(best));
 463     }
 464 }
 465
 466
 467 void spdc_endpoint_snap_free(SPEventContext const * const ec, NR::Point& p, guint const state)
 468 {
 469     /* Shift disables this snap */
 470     if (state & GDK_SHIFT_MASK) {
 471         return;
 472     }
 473
 474     SnapManager &m = SP_EVENT_CONTEXT_DESKTOP(ec)->namedview->snap_manager;
 475     m.setup(SP_EVENT_CONTEXT_DESKTOP(ec), NULL);
 476     m.freeSnapReturnByRef(Inkscape::Snapper::SNAPPOINT_NODE, p);
 477 }
 478
 479 static SPCurve *
 480 reverse_then_unref(SPCurve *orig)
 481 {
 482     SPCurve *ret = orig->create_reverse();
 483     orig->unref();
 484     return ret;
 485 }
 486
 487 /**
 488  * Concats red, blue and green.
 489  * If any anchors are defined, process these, optionally removing curves from white list
 490  * Invoke _flush_white to write result back to object.
 491  */
 492 void
 493 spdc_concat_colors_and_flush(SPDrawContext *dc, gboolean forceclosed)
 494 {
 495     /* Concat RBG */
 496     SPCurve *c = dc->green_curve;
 497
 498     /* Green */
 499     dc->green_curve = new SPCurve(64);
 500     while (dc->green_bpaths) {
 501         gtk_object_destroy(GTK_OBJECT(dc->green_bpaths->data));
 502         dc->green_bpaths = g_slist_remove(dc->green_bpaths, dc->green_bpaths->data);
 503     }
 504     /* Blue */
 505     c->append_continuous(dc->blue_curve, 0.0625);
 506     dc->blue_curve->reset();
 507     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(dc->blue_bpath), NULL);
 508     /* Red */
 509     if (dc->red_curve_is_valid) {
 510         c->append_continuous(dc->red_curve, 0.0625);
 511     }
 512     dc->red_curve->reset();
 513     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(dc->red_bpath), NULL);
 514
 515     if (c->is_empty()) {
 516         c->unref();
 517         return;
 518     }
 519
 520     /* Step A - test, whether we ended on green anchor */
 521     if ( forceclosed || ( dc->green_anchor && dc->green_anchor->active ) ) {
 522         // We hit green anchor, closing Green-Blue-Red
 523         SP_EVENT_CONTEXT_DESKTOP(dc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Path is closed."));
 524         c->closepath_current();
 525         /* Closed path, just flush */
 526         spdc_flush_white(dc, c);
 527         c->unref();
 528         return;
 529     }
 530
 531     /* Step B - both start and end anchored to same curve */
 532     if ( dc->sa && dc->ea
 533          && ( dc->sa->curve == dc->ea->curve )
 534          && ( ( dc->sa != dc->ea )
 535               || dc->sa->curve->is_closed() ) )
 536     {
 537         // We hit bot start and end of single curve, closing paths
 538         SP_EVENT_CONTEXT_DESKTOP(dc)->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Closing path."));
 539         if (dc->sa->start && !(dc->sa->curve->is_closed()) ) {
 540             c = reverse_then_unref(c);
 541         }
 542         dc->sa->curve->append_continuous(c, 0.0625);
 543         c->unref();
 544         dc->sa->curve->closepath_current();
 545         spdc_flush_white(dc, NULL);
 546         return;
 547     }
 548
 549     /* Step C - test start */
 550     if (dc->sa) {
 551         SPCurve *s = dc->sa->curve;
 552         dc->white_curves = g_slist_remove(dc->white_curves, s);
 553         if (dc->sa->start) {
 554             s = reverse_then_unref(s);
 555         }
 556         s->append_continuous(c, 0.0625);
 557         c->unref();
 558         c = s;
 559     } else /* Step D - test end */ if (dc->ea) {
 560         SPCurve *e = dc->ea->curve;
 561         dc->white_curves = g_slist_remove(dc->white_curves, e);
 562         if (!dc->ea->start) {
 563             e = reverse_then_unref(e);
 564         }
 565         c->append_continuous(e, 0.0625);
 566         e->unref();
 567     }
 568
 569
 570     spdc_flush_white(dc, c);
 571
 572     c->unref();
 573 }
 574
 575 static char const *
 576 tool_name(SPDrawContext *dc)
 577 {
 578     return ( SP_IS_PEN_CONTEXT(dc)
 579              ? "tools.freehand.pen"
 580              : "tools.freehand.pencil" );
 581 }
 582
 583 /*
 584  * Flushes white curve(s) and additional curve into object
 585  *
 586  * No cleaning of colored curves - this has to be done by caller
 587  * No rereading of white data, so if you cannot rely on ::modified, do it in caller
 588  *
 589  */
 590
 591 static void
 592 spdc_flush_white(SPDrawContext *dc, SPCurve *gc)
 593 {
 594     SPCurve *c;
 595
 596     if (dc->white_curves) {
 597         g_assert(dc->white_item);
 598         c = SPCurve::concat(dc->white_curves);
 599         g_slist_free(dc->white_curves);
 600         dc->white_curves = NULL;
 601         if (gc) {
 602             c->append(gc, FALSE);
 603         }
 604     } else if (gc) {
 605         c = gc;
 606         c->ref();
 607     } else {
 608         return;
 609     }
 610
 611     /* Now we have to go back to item coordinates at last */
 612     c->transform(( dc->white_item
 613                             ? from_2geom(sp_item_dt2i_affine(dc->white_item))
 614                             : sp_desktop_dt2root_affine(SP_EVENT_CONTEXT_DESKTOP(dc)) ));
 615
 616     SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(dc);
 617     SPDocument *doc = sp_desktop_document(desktop);
 618     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
 619
 620     if ( c && !c->is_empty() ) {
 621         /* We actually have something to write */
 622
 623         bool has_lpe = false;
 624         Inkscape::XML::Node *repr;
 625         if (dc->white_item) {
 626             repr = SP_OBJECT_REPR(dc->white_item);
 627             has_lpe = sp_lpe_item_has_path_effect_recursive(SP_LPE_ITEM(dc->white_item));
 628         } else {
 629             repr = xml_doc->createElement("svg:path");
 630             /* Set style */
 631             sp_desktop_apply_style_tool(desktop, repr, tool_name(dc), false);
 632         }
 633
 634         gchar *str = sp_svg_write_path( c->get_pathvector() );
 635         g_assert( str != NULL );
 636         if (has_lpe)
 637             repr->setAttribute("inkscape:original-d", str);
 638         else
 639             repr->setAttribute("d", str);
 640         g_free(str);
 641
 642         if (!dc->white_item) {
 643             /* Attach repr */
 644             SPItem *item = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr));
 645             dc->selection->set(repr);
 646             Inkscape::GC::release(repr);
 647             item->transform = from_2geom(i2i_affine(desktop->currentRoot(), desktop->currentLayer()));
 648             item->updateRepr();
 649         }
 650
 651
 652         // we finished the path; now apply any waiting LPEs or freehand shapes
 653         // FIXME: placing this here seems to cause issues with undo!
 654         spdc_check_for_and_apply_waiting_LPE(dc, dc->selection->singleItem());
 655
 656         sp_document_done(doc, SP_IS_PEN_CONTEXT(dc)? SP_VERB_CONTEXT_PEN : SP_VERB_CONTEXT_PENCIL,
 657                          _("Draw path"));
 658
 659         // When quickly drawing several subpaths with Shift, the next subpath may be finished and
 660         // flushed before the selection_modified signal is fired by the previous change, which
 661         // results in the tool losing all of the selected path's curve except that last subpath. To
 662         // fix this, we force the selection_modified callback now, to make sure the tool's curve is
 663         // in sync immediately.
 664         spdc_selection_modified(sp_desktop_selection(desktop), 0, dc);
 665     }
 666
 667     c->unref();
 668
 669     /* Flush pending updates */
 670     sp_document_ensure_up_to_date(doc);
 671 }
 672
 673 /**
 674  * Returns FIRST active anchor (the activated one).
 675  */
 676 SPDrawAnchor *
 677 spdc_test_inside(SPDrawContext *dc, NR::Point p)
 678 {
 679     SPDrawAnchor *active = NULL;
 680
 681     /* Test green anchor */
 682     if (dc->green_anchor) {
 683         active = sp_draw_anchor_test(dc->green_anchor, p, TRUE);
 684     }
 685
 686     for (GSList *l = dc->white_anchors; l != NULL; l = l->next) {
 687         SPDrawAnchor *na = sp_draw_anchor_test((SPDrawAnchor *) l->data, p, !active);
 688         if ( !active && na ) {
 689             active = na;
 690         }
 691     }
 692
 693     return active;
 694 }
 695
 696 static void
 697 spdc_reset_white(SPDrawContext *dc)
 698 {
 699     if (dc->white_item) {
 700         /* We do not hold refcount */
 701         dc->white_item = NULL;
 702     }
 703     while (dc->white_curves) {
 704         reinterpret_cast<SPCurve *>(dc->white_curves->data)->unref();
 705         dc->white_curves = g_slist_remove(dc->white_curves, dc->white_curves->data);
 706     }
 707     while (dc->white_anchors) {
 708         sp_draw_anchor_destroy((SPDrawAnchor *) dc->white_anchors->data);
 709         dc->white_anchors = g_slist_remove(dc->white_anchors, dc->white_anchors->data);
 710     }
 711 }
 712
 713 static void
 714 spdc_free_colors(SPDrawContext *dc)
 715 {
 716     /* Red */
 717     if (dc->red_bpath) {
 718         gtk_object_destroy(GTK_OBJECT(dc->red_bpath));
 719         dc->red_bpath = NULL;
 720     }
 721     if (dc->red_curve) {
 722         dc->red_curve = dc->red_curve->unref();
 723     }
 724     /* Blue */
 725     if (dc->blue_bpath) {
 726         gtk_object_destroy(GTK_OBJECT(dc->blue_bpath));
 727         dc->blue_bpath = NULL;
 728     }
 729     if (dc->blue_curve) {
 730         dc->blue_curve = dc->blue_curve->unref();
 731     }
 732     /* Green */
 733     while (dc->green_bpaths) {
 734         gtk_object_destroy(GTK_OBJECT(dc->green_bpaths->data));
 735         dc->green_bpaths = g_slist_remove(dc->green_bpaths, dc->green_bpaths->data);
 736     }
 737     if (dc->green_curve) {
 738         dc->green_curve = dc->green_curve->unref();
 739     }
 740     if (dc->green_anchor) {
 741         dc->green_anchor = sp_draw_anchor_destroy(dc->green_anchor);
 742     }
 743     /* White */
 744     if (dc->white_item) {
 745         /* We do not hold refcount */
 746         dc->white_item = NULL;
 747     }
 748     while (dc->white_curves) {
 749         reinterpret_cast<SPCurve *>(dc->white_curves->data)->unref();
 750         dc->white_curves = g_slist_remove(dc->white_curves, dc->white_curves->data);
 751     }
 752     while (dc->white_anchors) {
 753         sp_draw_anchor_destroy((SPDrawAnchor *) dc->white_anchors->data);
 754         dc->white_anchors = g_slist_remove(dc->white_anchors, dc->white_anchors->data);
 755     }
 756 }
 757
 758
 759 /*
 760   Local Variables:
 761   mode:c++
 762   c-file-style:"stroustrup"
 763   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 764   indent-tabs-mode:nil
 765   fill-column:99
 766   End:
 767 */
 768 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :