synfig-core/tags/stable/src/synfig/valuenode.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file valuenode.cpp
   3 **      \brief Implementation of the "Placeholder" valuenode conversion.
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
   9 **      Copyright (c) 2007, 2008 Chris Moore
  10 **  Copyright (c) 2008 Carlos López
  11 **
  12 **      This package is free software; you can redistribute it and/or
  13 **      modify it under the terms of the GNU General Public License as
  14 **      published by the Free Software Foundation; either version 2 of
  15 **      the License, or (at your option) any later version.
  16 **
  17 **      This package is distributed in the hope that it will be useful,
  18 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  20 **      General Public License for more details.
  21 **      \endlegal
  22 */
  23 /* ========================================================================= */
  24
  25 /* === H E A D E R S ======================================================= */
  26
  27 #define SYNFIG_NO_ANGLE
  28
  29 //#define HAS_HASH_MAP 1
  30
  31 #ifdef USING_PCH
  32 #       include "pch.h"
  33 #else
  34 #ifdef HAVE_CONFIG_H
  35 #       include <config.h>
  36 #endif
  37
  38 #include "valuenode.h"
  39 #include "general.h"
  40 #include "canvas.h"
  41 #include "paramdesc.h"
  42 #include "releases.h"
  43
  44 #include "valuenode_const.h"
  45 #include "valuenode_linear.h"
  46 #include "valuenode_composite.h"
  47 #include "valuenode_reference.h"
  48 #include "valuenode_scale.h"
  49 #include "valuenode_blinecalctangent.h"
  50 #include "valuenode_blinecalcvertex.h"
  51 #include "valuenode_blinecalcwidth.h"
  52 #include "valuenode_blinereversetangent.h"
  53 #include "valuenode_segcalctangent.h"
  54 #include "valuenode_segcalcvertex.h"
  55 #include "valuenode_repeat_gradient.h"
  56 #include "valuenode_stripes.h"
  57 #include "valuenode_range.h"
  58 #include "valuenode_add.h"
  59 #include "valuenode_subtract.h"
  60 #include "valuenode_timedswap.h"
  61 #include "valuenode_twotone.h"
  62 #include "valuenode_bline.h"
  63 #include "valuenode_dynamiclist.h"
  64 #include "valuenode_radialcomposite.h"
  65 #include "valuenode_gradientrotate.h"
  66 #include "valuenode_sine.h"
  67 #include "valuenode_cos.h"
  68 #include "valuenode_atan2.h"
  69 #include "valuenode_exp.h"
  70 #include "valuenode_switch.h"
  71 #include "valuenode_timeloop.h"
  72 #include "valuenode_reciprocal.h"
  73 #include "valuenode_duplicate.h"
  74 #include "valuenode_integer.h"
  75 #include "valuenode_step.h"
  76 #include "valuenode_vectorangle.h"
  77 #include "valuenode_vectorlength.h"
  78 #include "valuenode_vectorx.h"
  79 #include "valuenode_vectory.h"
  80 #include "valuenode_gradientcolor.h"
  81 #include "valuenode_dotproduct.h"
  82 #include "valuenode_timestring.h"
  83 #include "valuenode_realstring.h"
  84 #include "valuenode_join.h"
  85 #include "valuenode_anglestring.h"
  86 #include "valuenode_intstring.h"
  87 #include "valuenode_log.h"
  88
  89 #include "layer.h"
  90
  91 #endif
  92
  93 /* === U S I N G =========================================================== */
  94
  95 using namespace std;
  96 using namespace etl;
  97 using namespace synfig;
  98
  99 /* === M A C R O S ========================================================= */
 100
 101 /* === G L O B A L S ======================================================= */
 102
 103 static int value_node_count(0);
 104
 105 static LinkableValueNode::Book *book_;
 106
 107
 108 ValueNode::LooseHandle
 109 synfig::find_value_node(const GUID& guid)
 110 {
 111         return guid_cast<ValueNode>(guid);
 112 }
 113
 114 /* === P R O C E D U R E S ================================================= */
 115
 116 /* === M E T H O D S ======================================================= */
 117
 118 bool
 119 ValueNode::subsys_init()
 120 {
 121         book_=new LinkableValueNode::Book();
 122
 123 #define ADD_VALUENODE(class,name,local,version)                                                                                                 \
 124         (*book_)[name].factory=reinterpret_cast<LinkableValueNode::Factory>(&class::create);            \
 125         (*book_)[name].check_type=&class::check_type;                                                                                           \
 126         (*book_)[name].local_name=local;                                                                                                                        \
 127         (*book_)[name].release_version=version
 128
 129 #define ADD_VALUENODE2(class,name,local,version)                                                                                                \
 130         (*book_)[name].factory=reinterpret_cast<LinkableValueNode::Factory>(&class::create_from);       \
 131         (*book_)[name].check_type=&class::check_type;                                                                                           \
 132         (*book_)[name].local_name=local;                                                                                                                        \
 133         (*book_)[name].release_version=version
 134
 135         ADD_VALUENODE(ValueNode_Linear,                   "linear",                       _("Linear"),                   RELEASE_VERSION_0_61_06);
 136         ADD_VALUENODE(ValueNode_Composite,                "composite",            _("Composite"),                RELEASE_VERSION_0_61_06);
 137         ADD_VALUENODE(ValueNode_RadialComposite,  "radial_composite", _("Radial Composite"), RELEASE_VERSION_0_61_06);
 138         ADD_VALUENODE(ValueNode_Reference,                "reference",            _("Reference"),                RELEASE_VERSION_0_61_06);
 139         ADD_VALUENODE(ValueNode_Scale,                    "scale",                        _("Scale"),                    RELEASE_VERSION_0_61_06);
 140         ADD_VALUENODE(ValueNode_SegCalcTangent,   "segcalctangent",       _("Segment Tangent"),  RELEASE_VERSION_0_61_06);
 141         ADD_VALUENODE(ValueNode_SegCalcVertex,    "segcalcvertex",        _("Segment Vertex"),   RELEASE_VERSION_0_61_06);
 142         ADD_VALUENODE(ValueNode_Stripes,                  "stripes",              _("Stripes"),                  RELEASE_VERSION_0_61_06);
 143         ADD_VALUENODE(ValueNode_Subtract,                 "subtract",             _("Subtract"),                 RELEASE_VERSION_0_61_06);
 144         ADD_VALUENODE(ValueNode_TwoTone,                  "twotone",              _("Two-Tone"),                 RELEASE_VERSION_0_61_06);
 145         ADD_VALUENODE(ValueNode_BLine,                    "bline",                        _("BLine"),                    RELEASE_VERSION_0_61_06);
 146         ADD_VALUENODE2(ValueNode_DynamicList,     "dynamic_list",         _("Dynamic List"),     RELEASE_VERSION_0_61_06);
 147         ADD_VALUENODE(ValueNode_GradientRotate,   "gradient_rotate",  _("Gradient Rotate"),      RELEASE_VERSION_0_61_06);
 148         ADD_VALUENODE(ValueNode_Sine,                     "sine",                         _("Sine"),                     RELEASE_VERSION_0_61_06);
 149
 150         ADD_VALUENODE(ValueNode_TimedSwap,                "timed_swap",           _("Timed Swap"),               RELEASE_VERSION_0_61_07); // SVN r610
 151         ADD_VALUENODE(ValueNode_Repeat_Gradient,  "repeat_gradient",  _("Repeat Gradient"),      RELEASE_VERSION_0_61_07); // SVN r666
 152         ADD_VALUENODE(ValueNode_Exp,                      "exp",                          _("Exponential"),              RELEASE_VERSION_0_61_07); // SVN r739
 153         ADD_VALUENODE(ValueNode_Add,                      "add",                          _("Add"),                              RELEASE_VERSION_0_61_07); // SVN r742
 154         ADD_VALUENODE(ValueNode_BLineCalcTangent, "blinecalctangent", _("BLine Tangent"),        RELEASE_VERSION_0_61_07); // SVN r744
 155         ADD_VALUENODE(ValueNode_BLineCalcVertex,  "blinecalcvertex",  _("BLine Vertex"),         RELEASE_VERSION_0_61_07); // SVN r744
 156         ADD_VALUENODE(ValueNode_Range,                    "range",                        _("Range"),                    RELEASE_VERSION_0_61_07); // SVN r776
 157
 158         ADD_VALUENODE(ValueNode_Switch,                   "switch",                       _("Switch"),                   RELEASE_VERSION_0_61_08); // SVN r923
 159         ADD_VALUENODE(ValueNode_Cos,                      "cos",                          _("Cos"),                              RELEASE_VERSION_0_61_08); // SVN r1111
 160         ADD_VALUENODE(ValueNode_Atan2,                    "atan2",                        _("aTan2"),                    RELEASE_VERSION_0_61_08); // SVN r1132
 161         ADD_VALUENODE(ValueNode_BLineRevTangent,  "blinerevtangent",  _("Reverse Tangent"),      RELEASE_VERSION_0_61_08); // SVN r1162
 162         ADD_VALUENODE(ValueNode_TimeLoop,                 "timeloop",             _("Time Loop"),                RELEASE_VERSION_0_61_08); // SVN r1226
 163         ADD_VALUENODE(ValueNode_Reciprocal,               "reciprocal",           _("Reciprocal"),               RELEASE_VERSION_0_61_08); // SVN r1238
 164         ADD_VALUENODE(ValueNode_Duplicate,                "duplicate",            _("Duplicate"),                RELEASE_VERSION_0_61_08); // SVN r1267
 165         ADD_VALUENODE(ValueNode_Integer,                  "fromint",              _("From Integer"),     RELEASE_VERSION_0_61_08); // SVN r1267
 166         ADD_VALUENODE(ValueNode_Step,                     "step",                         _("Step"),                     RELEASE_VERSION_0_61_08); // SVN r1691
 167         ADD_VALUENODE(ValueNode_BLineCalcWidth,   "blinecalcwidth",       _("BLine Width"),              RELEASE_VERSION_0_61_08); // SVN r1694
 168
 169         ADD_VALUENODE(ValueNode_VectorAngle,      "vectorangle",          _("Vector Angle"),     RELEASE_VERSION_0_61_09); // SVN r1880
 170         ADD_VALUENODE(ValueNode_VectorLength,     "vectorlength",         _("Vector Length"),    RELEASE_VERSION_0_61_09); // SVN r1881
 171         ADD_VALUENODE(ValueNode_VectorX,                  "vectorx",              _("Vector X"),                 RELEASE_VERSION_0_61_09); // SVN r1882
 172         ADD_VALUENODE(ValueNode_VectorY,                  "vectory",              _("Vector Y"),                 RELEASE_VERSION_0_61_09); // SVN r1882
 173         ADD_VALUENODE(ValueNode_GradientColor,    "gradientcolor",        _("Gradient Color"),   RELEASE_VERSION_0_61_09); // SVN r1885
 174         ADD_VALUENODE(ValueNode_DotProduct,               "dotproduct",           _("Dot Product"),              RELEASE_VERSION_0_61_09); // SVN r1891
 175         ADD_VALUENODE(ValueNode_TimeString,               "timestring",           _("Time String"),              RELEASE_VERSION_0_61_09); // SVN r2000
 176         ADD_VALUENODE(ValueNode_RealString,               "realstring",           _("Real String"),              RELEASE_VERSION_0_61_09); // SVN r2003
 177         ADD_VALUENODE(ValueNode_Join,                     "join",                         _("Joined List"),              RELEASE_VERSION_0_61_09); // SVN r2007
 178         ADD_VALUENODE(ValueNode_AngleString,      "anglestring",          _("Angle String"),     RELEASE_VERSION_0_61_09); // SVN r2010
 179         ADD_VALUENODE(ValueNode_IntString,                "intstring",            _("Int String"),               RELEASE_VERSION_0_61_09); // SVN r2010
 180         ADD_VALUENODE(ValueNode_Logarithm,                "logarithm",            _("Logarithm"),                RELEASE_VERSION_0_61_09); // SVN r2034
 181
 182 #undef ADD_VALUENODE
 183 #undef ADD_VALUENODE2
 184
 185         return true;
 186 }
 187
 188 bool
 189 ValueNode::subsys_stop()
 190 {
 191         delete book_;
 192 /*      if(global_value_node_map.size() || value_node_count)
 193         {
 194                 if(value_node_count)
 195                         synfig::error("%d ValueNodes haven't been destroyed yet!",value_node_count);
 196
 197                 if(global_value_node_map.size()!=value_node_count)
 198                         synfig::error("value node count mismatch! map.size()!=value_node_count (%d!=%d)",global_value_node_map.size(),value_node_count);
 199
 200                 GlobalValueNodeMap::iterator iter;
 201                 for(iter=global_value_node_map.begin();iter!=global_value_node_map.end();++iter)
 202                 {
 203                         if(!iter->second->is_exported())
 204                                 synfig::info(_("%s: count:%d name:%s type:%s"),
 205                                         iter->first.get_string().c_str(),
 206                                         iter->second->count(),
 207                                         iter->second->get_name().c_str(),
 208                                         ValueBase::type_local_name(iter->second->get_type()).c_str()
 209                                 );
 210                         else
 211                                 synfig::info(_("%s: id:%s count:%d name:%s type:%s"),
 212                                         iter->first.get_string().c_str(),
 213                                         iter->second->get_id().c_str(),
 214                                         iter->second->count(),
 215                                         iter->second->get_name().c_str(),
 216                                         ValueBase::type_local_name(iter->second->get_type()).c_str()
 217                                 );
 218                 }
 219         }
 220 */
 221         return true;
 222 }
 223
 224 ValueNode::ValueNode(ValueBase::Type type):type(type)
 225 {
 226         value_node_count++;
 227 }
 228
 229 LinkableValueNode::Book&
 230 LinkableValueNode::book()
 231 {
 232         return *book_;
 233 }
 234
 235 LinkableValueNode::Handle
 236 LinkableValueNode::create(const String &name, const ValueBase& x)
 237 {
 238         if(!book().count(name))
 239                 return 0;
 240
 241         if (!check_type(name, x.get_type()) &&
 242                 // the Duplicate ValueNode is an exception - we don't want the
 243                 // user creating it for themselves, so check_type() fails for
 244                 // it even when it is valid
 245                 !(name == "duplicate" && x.get_type() == ValueBase::TYPE_REAL))
 246         {
 247                 error(_("Bad type: ValueNode '%s' doesn't accept type '%s'"), book()[name].local_name.c_str(), ValueBase::type_local_name(x.get_type()).c_str());
 248                 return 0;
 249         }
 250
 251         return book()[name].factory(x);
 252 }
 253
 254 bool
 255 LinkableValueNode::check_type(const String &name, ValueBase::Type x)
 256 {
 257         if(!book().count(name) || !book()[name].check_type)
 258                 return false;
 259         return book()[name].check_type(x);
 260 }
 261
 262 bool
 263 LinkableValueNode::set_link(int i,ValueNode::Handle x)
 264 {
 265         ValueNode::Handle previous(get_link(i));
 266
 267         if(set_link_vfunc(i,x))
 268         {
 269                 if(previous)
 270                         remove_child(previous.get());
 271                 add_child(x.get());
 272
 273                 if(!x->is_exported() && get_parent_canvas())
 274                 {
 275                         x->set_parent_canvas(get_parent_canvas());
 276                 }
 277                 changed();
 278                 return true;
 279         }
 280         return false;
 281 }
 282
 283 ValueNode::LooseHandle
 284 LinkableValueNode::get_link(int i)const
 285 {
 286         return get_link_vfunc(i);
 287 }
 288
 289 void
 290 LinkableValueNode::unlink_all()
 291 {
 292         for(int i=0;i<link_count();i++)
 293         {
 294                 ValueNode::LooseHandle value_node(get_link(i));
 295                 if(value_node)
 296                         value_node->parent_set.erase(this);
 297         }
 298 }
 299
 300 ValueNode::~ValueNode()
 301 {
 302         value_node_count--;
 303
 304         begin_delete();
 305 }
 306
 307 void
 308 ValueNode::on_changed()
 309 {
 310         etl::loose_handle<Canvas> parent_canvas = get_parent_canvas();
 311         if(parent_canvas)
 312                 do                                              // signal to all the ancestor canvases
 313                         parent_canvas->signal_value_node_changed()(this);
 314                 while (parent_canvas = parent_canvas->parent());
 315         else if(get_root_canvas())
 316                 get_root_canvas()->signal_value_node_changed()(this);
 317
 318         Node::on_changed();
 319 }
 320
 321 int
 322 ValueNode::replace(etl::handle<ValueNode> x)
 323 {
 324         if(x.get()==this)
 325                 return 0;
 326
 327         while(parent_set.size())
 328         {
 329                 (*parent_set.begin())->add_child(x.get());
 330                 (*parent_set.begin())->remove_child(this);
 331                 //x->parent_set.insert(*parent_set.begin());
 332                 //parent_set.erase(parent_set.begin());
 333         }
 334         int r(RHandle(this).replace(x));
 335         x->changed();
 336         return r;
 337 }
 338
 339 void
 340 ValueNode::set_id(const String &x)
 341 {
 342         if(name!=x)
 343         {
 344                 name=x;
 345                 signal_id_changed_();
 346         }
 347 }
 348
 349 String
 350 ValueNode::get_description(bool show_exported_name)const
 351 {
 352         String ret(_("ValueNode"));
 353
 354         if (dynamic_cast<const LinkableValueNode*>(this))
 355                 return (dynamic_cast<const LinkableValueNode*>(this))->get_description(-1, show_exported_name);
 356
 357         if (show_exported_name && !is_exported())
 358                 show_exported_name = false;
 359
 360         if (show_exported_name)
 361                 ret += strprintf(" (%s)", get_id().c_str());
 362
 363         return ret;
 364 }
 365
 366 ValueNodeList::ValueNodeList():
 367         placeholder_count_(0)
 368 {
 369 }
 370
 371 bool
 372 ValueNodeList::count(const String &id)const
 373 {
 374         const_iterator iter;
 375
 376         if(id.empty())
 377                 return false;
 378
 379         for(iter=begin();iter!=end() && id!=(*iter)->get_id();++iter)
 380                 ;
 381
 382         if(iter==end())
 383                 return false;
 384
 385         return true;
 386 }
 387
 388 ValueNode::Handle
 389 ValueNodeList::find(const String &id)
 390 {
 391         iterator iter;
 392
 393         if(id.empty())
 394                 throw Exception::IDNotFound("Empty ID");
 395
 396         for(iter=begin();iter!=end() && id!=(*iter)->get_id();++iter)
 397                 ;
 398
 399         if(iter==end())
 400                 throw Exception::IDNotFound("ValueNode in ValueNodeList: "+id);
 401
 402         return *iter;
 403 }
 404
 405 ValueNode::ConstHandle
 406 ValueNodeList::find(const String &id)const
 407 {
 408         const_iterator iter;
 409
 410         if(id.empty())
 411                 throw Exception::IDNotFound("Empty ID");
 412
 413         for(iter=begin();iter!=end() && id!=(*iter)->get_id();++iter)
 414                 ;
 415
 416         if(iter==end())
 417                 throw Exception::IDNotFound("ValueNode in ValueNodeList: "+id);
 418
 419         return *iter;
 420 }
 421
 422 ValueNode::Handle
 423 ValueNodeList::surefind(const String &id)
 424 {
 425         if(id.empty())
 426                 throw Exception::IDNotFound("Empty ID");
 427
 428         ValueNode::Handle value_node;
 429
 430         try
 431         {
 432                 value_node=find(id);
 433         }
 434         catch(Exception::IDNotFound)
 435         {
 436                 value_node=PlaceholderValueNode::create();
 437                 value_node->set_id(id);
 438                 push_back(value_node);
 439                 placeholder_count_++;
 440         }
 441
 442         return value_node;
 443 }
 444
 445 bool
 446 ValueNodeList::erase(ValueNode::Handle value_node)
 447 {
 448         assert(value_node);
 449
 450         iterator iter;
 451
 452         for(iter=begin();iter!=end();++iter)
 453                 if(value_node.get()==iter->get())
 454                 {
 455                         std::list<ValueNode::RHandle>::erase(iter);
 456                         if(PlaceholderValueNode::Handle::cast_dynamic(value_node))
 457                                 placeholder_count_--;
 458                         return true;
 459                 }
 460         return false;
 461 }
 462
 463 bool
 464 ValueNodeList::add(ValueNode::Handle value_node)
 465 {
 466         if(!value_node)
 467                 return false;
 468         if(value_node->get_id().empty())
 469                 return false;
 470
 471         try
 472         {
 473                 ValueNode::RHandle other_value_node=find(value_node->get_id());
 474                 if(PlaceholderValueNode::Handle::cast_dynamic(other_value_node))
 475                 {
 476                         other_value_node->replace(value_node);
 477                         placeholder_count_--;
 478                         return true;
 479                 }
 480
 481                 return false;
 482         }
 483         catch(Exception::IDNotFound)
 484         {
 485                 push_back(value_node);
 486                 return true;
 487         }
 488
 489         return false;
 490 }
 491
 492 void
 493 ValueNodeList::audit()
 494 {
 495         iterator iter,next;
 496
 497         for(next=begin(),iter=next++;iter!=end();iter=next++)
 498                 if(iter->count()==1)
 499                         std::list<ValueNode::RHandle>::erase(iter);
 500 }
 501
 502
 503 String
 504 PlaceholderValueNode::get_name()const
 505 {
 506         return "placeholder";
 507 }
 508
 509 String
 510 PlaceholderValueNode::get_local_name()const
 511 {
 512         return _("Placeholder");
 513 }
 514
 515 ValueNode*
 516 PlaceholderValueNode::clone(const GUID& deriv_guid)const
 517 {
 518         ValueNode* ret(new PlaceholderValueNode());
 519         ret->set_guid(get_guid()^deriv_guid);
 520         return ret;
 521 }
 522
 523 PlaceholderValueNode::Handle
 524 PlaceholderValueNode::create(ValueBase::Type type)
 525 {
 526         return new PlaceholderValueNode(type);
 527 }
 528
 529 ValueBase
 530 PlaceholderValueNode::operator()(Time /*t*/)const
 531 {
 532         assert(0);
 533         return ValueBase();
 534 }
 535
 536 PlaceholderValueNode::PlaceholderValueNode(ValueBase::Type type):
 537         ValueNode(type)
 538 {
 539 }
 540
 541 ValueNode*
 542 LinkableValueNode::clone(const GUID& deriv_guid)const
 543 {
 544         {
 545                 ValueNode* x(find_value_node(get_guid()^deriv_guid).get());
 546                 if(x)
 547                         return x;
 548         }
 549
 550         int i;
 551         LinkableValueNode *ret=create_new();
 552         ret->set_guid(get_guid()^deriv_guid);
 553
 554         for(i=0;i<link_count();i++)
 555         {
 556                 ValueNode::Handle link=get_link_vfunc(i);
 557                 if(!link->is_exported())
 558                 {
 559                         ValueNode::LooseHandle value_node(find_value_node(link->get_guid()^deriv_guid));
 560                         if(!value_node)
 561                                 value_node=link->clone(deriv_guid);
 562                         ret->set_link(i,value_node);
 563                 }
 564                 else
 565                         ret->set_link(i,link);
 566         }
 567
 568         return ret;
 569 }
 570
 571 String
 572 ValueNode::get_relative_id(etl::loose_handle<const Canvas> x)const
 573 {
 574         assert(is_exported());
 575         assert(canvas_);
 576
 577         if(x.get()==canvas_.get())
 578                 return get_id();
 579
 580         return canvas_->_get_relative_id(x)+':'+get_id();
 581 }
 582
 583 void
 584 ValueNode::set_parent_canvas(etl::loose_handle<Canvas> x)
 585 {
 586         canvas_=x; if(x) root_canvas_=x->get_root();
 587 }
 588
 589 void
 590 ValueNode::set_root_canvas(etl::loose_handle<Canvas> x)
 591 {
 592         root_canvas_=x->get_root();
 593 }
 594
 595 void LinkableValueNode::get_times_vfunc(Node::time_set &set) const
 596 {
 597         ValueNode::LooseHandle  h;
 598
 599         int size = link_count();
 600
 601         //just add it to the set...
 602         for(int i=0; i < size; ++i)
 603         {
 604                 h = get_link(i);
 605
 606                 if(h)
 607                 {
 608                         const Node::time_set &tset = h->get_times();
 609                         set.insert(tset.begin(),tset.end());
 610                 }
 611         }
 612 }
 613
 614 String
 615 LinkableValueNode::get_description(int index, bool show_exported_name)const
 616 {
 617         String description;
 618
 619         if (index == -1)
 620         {
 621                 if (show_exported_name && is_exported())
 622                         description += strprintf(" (%s)", get_id().c_str());
 623         }
 624         else
 625         {
 626                 description = String(":") + link_local_name(index);
 627
 628                 if (show_exported_name)
 629                 {
 630                         ValueNode::LooseHandle link(get_link(index));
 631                         if (link->is_exported())
 632                                 description += strprintf(" (%s)", link->get_id().c_str());
 633                 }
 634         }
 635
 636         const synfig::Node* node = this;
 637         LinkableValueNode::ConstHandle parent_linkable_vn = 0;
 638
 639         // walk up through the valuenodes trying to find the layer at the top
 640         while (!node->parent_set.empty() && !dynamic_cast<const Layer*>(node))
 641         {
 642                 LinkableValueNode::ConstHandle linkable_value_node(dynamic_cast<const LinkableValueNode*>(node));
 643                 if (linkable_value_node)
 644                 {
 645                         String link;
 646                         int cnt = linkable_value_node->link_count();
 647                         for (int i = 0; i < cnt; i++)
 648                                 if (linkable_value_node->get_link(i) == parent_linkable_vn)
 649                                 {
 650                                         link = String(":") + linkable_value_node->link_local_name(i);
 651                                         break;
 652                                 }
 653
 654                         description = linkable_value_node->get_local_name() + link + (parent_linkable_vn?">":"") + description;
 655                 }
 656                 node = *node->parent_set.begin();
 657                 parent_linkable_vn = linkable_value_node;
 658         }
 659
 660         Layer::ConstHandle parent_layer(dynamic_cast<const Layer*>(node));
 661         if(parent_layer)
 662         {
 663                 String param;
 664                 const Layer::DynamicParamList &dynamic_param_list(parent_layer->dynamic_param_list());
 665                 // loop to find the parameter in the dynamic parameter list - this gives us its name
 666                 for (Layer::DynamicParamList::const_iterator iter = dynamic_param_list.begin(); iter != dynamic_param_list.end(); iter++)
 667                         if (iter->second == parent_linkable_vn)
 668                                 param = String(":") + parent_layer->get_param_local_name(iter->first);
 669                 description = strprintf("(%s)%s>%s",
 670                                                                 parent_layer->get_non_empty_description().c_str(),
 671                                                                 param.c_str(),
 672                                                                 description.c_str());
 673         }
 674
 675         return description;
 676 }