synfig-core/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 #ifdef USING_PCH
  28 #       include "pch.h"
  29 #else
  30 #ifdef HAVE_CONFIG_H
  31 #       include <config.h>
  32 #endif
  33
  34 #include "valuenode.h"
  35 #include "general.h"
  36 #include "canvas.h"
  37 #include "releases.h"
  38
  39 #include "valuenode_const.h"
  40 #include "valuenode_linear.h"
  41 #include "valuenode_composite.h"
  42 #include "valuenode_reference.h"
  43 #include "valuenode_greyed.h"
  44 #include "valuenode_scale.h"
  45 #include "valuenode_blinecalctangent.h"
  46 #include "valuenode_blinecalcvertex.h"
  47 #include "valuenode_blinecalcwidth.h"
  48 #include "valuenode_blinereversetangent.h"
  49 #include "valuenode_segcalctangent.h"
  50 #include "valuenode_segcalcvertex.h"
  51 #include "valuenode_repeat_gradient.h"
  52 #include "valuenode_stripes.h"
  53 #include "valuenode_range.h"
  54 #include "valuenode_add.h"
  55 #include "valuenode_subtract.h"
  56 #include "valuenode_timedswap.h"
  57 #include "valuenode_twotone.h"
  58 #include "valuenode_bline.h"
  59 #include "valuenode_dynamiclist.h"
  60 #include "valuenode_radialcomposite.h"
  61 #include "valuenode_gradientrotate.h"
  62 #include "valuenode_sine.h"
  63 #include "valuenode_cos.h"
  64 #include "valuenode_atan2.h"
  65 #include "valuenode_exp.h"
  66 #include "valuenode_switch.h"
  67 #include "valuenode_timeloop.h"
  68 #include "valuenode_reciprocal.h"
  69 #include "valuenode_duplicate.h"
  70 #include "valuenode_integer.h"
  71 #include "valuenode_step.h"
  72 #include "valuenode_vectorangle.h"
  73 #include "valuenode_vectorlength.h"
  74 #include "valuenode_vectorx.h"
  75 #include "valuenode_vectory.h"
  76 #include "valuenode_gradientcolor.h"
  77 #include "valuenode_dotproduct.h"
  78 #include "valuenode_timestring.h"
  79 #include "valuenode_realstring.h"
  80 #include "valuenode_join.h"
  81 #include "valuenode_anglestring.h"
  82 #include "valuenode_intstring.h"
  83 #include "valuenode_log.h"
  84 #include "valuenode_pow.h"
  85 #include "valuenode_compare.h"
  86 #include "valuenode_not.h"
  87 #include "valuenode_and.h"
  88 #include "valuenode_or.h"
  89
  90 #include "layer.h"
  91
  92 #endif
  93
  94 /* === U S I N G =========================================================== */
  95
  96 using namespace std;
  97 using namespace etl;
  98 using namespace synfig;
  99
 100 /* === M A C R O S ========================================================= */
 101
 102 /* === G L O B A L S ======================================================= */
 103
 104 static int value_node_count(0);
 105
 106 static LinkableValueNode::Book *book_;
 107
 108
 109 ValueNode::LooseHandle
 110 synfig::find_value_node(const GUID& guid)
 111 {
 112         return guid_cast<ValueNode>(guid);
 113 }
 114
 115 /* === P R O C E D U R E S ================================================= */
 116
 117 /* === M E T H O D S ======================================================= */
 118
 119 bool
 120 ValueNode::subsys_init()
 121 {
 122         book_=new LinkableValueNode::Book();
 123
 124 #define ADD_VALUENODE(class,name,local,version)                                                                                                 \
 125         (*book_)[name].factory=reinterpret_cast<LinkableValueNode::Factory>(&class::create);            \
 126         (*book_)[name].check_type=&class::check_type;                                                                                           \
 127         (*book_)[name].local_name=local;                                                                                                                        \
 128         (*book_)[name].release_version=version
 129
 130 #define ADD_VALUENODE2(class,name,local,version)                                                                                                \
 131         (*book_)[name].factory=reinterpret_cast<LinkableValueNode::Factory>(&class::create_from);       \
 132         (*book_)[name].check_type=&class::check_type;                                                                                           \
 133         (*book_)[name].local_name=local;                                                                                                                        \
 134         (*book_)[name].release_version=version
 135
 136         ADD_VALUENODE(ValueNode_Linear,                   "linear",                       _("Linear"),                   RELEASE_VERSION_0_61_06);
 137         ADD_VALUENODE(ValueNode_Composite,                "composite",            _("Composite"),                RELEASE_VERSION_0_61_06);
 138         ADD_VALUENODE(ValueNode_RadialComposite,  "radial_composite", _("Radial Composite"), RELEASE_VERSION_0_61_06);
 139         ADD_VALUENODE(ValueNode_Reference,                "reference",            _("Reference"),                RELEASE_VERSION_0_61_06);
 140         ADD_VALUENODE(ValueNode_Scale,                    "scale",                        _("Scale"),                    RELEASE_VERSION_0_61_06);
 141         ADD_VALUENODE(ValueNode_SegCalcTangent,   "segcalctangent",       _("Segment Tangent"),  RELEASE_VERSION_0_61_06);
 142         ADD_VALUENODE(ValueNode_SegCalcVertex,    "segcalcvertex",        _("Segment Vertex"),   RELEASE_VERSION_0_61_06);
 143         ADD_VALUENODE(ValueNode_Stripes,                  "stripes",              _("Stripes"),                  RELEASE_VERSION_0_61_06);
 144         ADD_VALUENODE(ValueNode_Subtract,                 "subtract",             _("Subtract"),                 RELEASE_VERSION_0_61_06);
 145         ADD_VALUENODE(ValueNode_TwoTone,                  "twotone",              _("Two-Tone"),                 RELEASE_VERSION_0_61_06);
 146         ADD_VALUENODE(ValueNode_BLine,                    "bline",                        _("BLine"),                    RELEASE_VERSION_0_61_06);
 147         ADD_VALUENODE2(ValueNode_DynamicList,     "dynamic_list",         _("Dynamic List"),     RELEASE_VERSION_0_61_06);
 148         ADD_VALUENODE(ValueNode_GradientRotate,   "gradient_rotate",  _("Gradient Rotate"),      RELEASE_VERSION_0_61_06);
 149         ADD_VALUENODE(ValueNode_Sine,                     "sine",                         _("Sine"),                     RELEASE_VERSION_0_61_06);
 150
 151         ADD_VALUENODE(ValueNode_TimedSwap,                "timed_swap",           _("Timed Swap"),               RELEASE_VERSION_0_61_07); // SVN r610
 152         ADD_VALUENODE(ValueNode_Repeat_Gradient,  "repeat_gradient",  _("Repeat Gradient"),      RELEASE_VERSION_0_61_07); // SVN r666
 153         ADD_VALUENODE(ValueNode_Exp,                      "exp",                          _("Exponential"),              RELEASE_VERSION_0_61_07); // SVN r739
 154         ADD_VALUENODE(ValueNode_Add,                      "add",                          _("Add"),                              RELEASE_VERSION_0_61_07); // SVN r742
 155         ADD_VALUENODE(ValueNode_BLineCalcTangent, "blinecalctangent", _("BLine Tangent"),        RELEASE_VERSION_0_61_07); // SVN r744
 156         ADD_VALUENODE(ValueNode_BLineCalcVertex,  "blinecalcvertex",  _("BLine Vertex"),         RELEASE_VERSION_0_61_07); // SVN r744
 157         ADD_VALUENODE(ValueNode_Range,                    "range",                        _("Range"),                    RELEASE_VERSION_0_61_07); // SVN r776
 158
 159         ADD_VALUENODE(ValueNode_Switch,                   "switch",                       _("Switch"),                   RELEASE_VERSION_0_61_08); // SVN r923
 160         ADD_VALUENODE(ValueNode_Cos,                      "cos",                          _("Cos"),                              RELEASE_VERSION_0_61_08); // SVN r1111
 161         ADD_VALUENODE(ValueNode_Atan2,                    "atan2",                        _("aTan2"),                    RELEASE_VERSION_0_61_08); // SVN r1132
 162         ADD_VALUENODE(ValueNode_BLineRevTangent,  "blinerevtangent",  _("Reverse Tangent"),      RELEASE_VERSION_0_61_08); // SVN r1162
 163         ADD_VALUENODE(ValueNode_TimeLoop,                 "timeloop",             _("Time Loop"),                RELEASE_VERSION_0_61_08); // SVN r1226
 164         ADD_VALUENODE(ValueNode_Reciprocal,               "reciprocal",           _("Reciprocal"),               RELEASE_VERSION_0_61_08); // SVN r1238
 165         ADD_VALUENODE(ValueNode_Duplicate,                "duplicate",            _("Duplicate"),                RELEASE_VERSION_0_61_08); // SVN r1267
 166         ADD_VALUENODE(ValueNode_Integer,                  "fromint",              _("From Integer"),     RELEASE_VERSION_0_61_08); // SVN r1267
 167         ADD_VALUENODE(ValueNode_Step,                     "step",                         _("Step"),                     RELEASE_VERSION_0_61_08); // SVN r1691
 168         ADD_VALUENODE(ValueNode_BLineCalcWidth,   "blinecalcwidth",       _("BLine Width"),              RELEASE_VERSION_0_61_08); // SVN r1694
 169
 170         ADD_VALUENODE(ValueNode_VectorAngle,      "vectorangle",          _("Vector Angle"),     RELEASE_VERSION_0_61_09); // SVN r1880
 171         ADD_VALUENODE(ValueNode_VectorLength,     "vectorlength",         _("Vector Length"),    RELEASE_VERSION_0_61_09); // SVN r1881
 172         ADD_VALUENODE(ValueNode_VectorX,                  "vectorx",              _("Vector X"),                 RELEASE_VERSION_0_61_09); // SVN r1882
 173         ADD_VALUENODE(ValueNode_VectorY,                  "vectory",              _("Vector Y"),                 RELEASE_VERSION_0_61_09); // SVN r1882
 174         ADD_VALUENODE(ValueNode_GradientColor,    "gradientcolor",        _("Gradient Color"),   RELEASE_VERSION_0_61_09); // SVN r1885
 175         ADD_VALUENODE(ValueNode_DotProduct,               "dotproduct",           _("Dot Product"),              RELEASE_VERSION_0_61_09); // SVN r1891
 176         ADD_VALUENODE(ValueNode_TimeString,               "timestring",           _("Time String"),              RELEASE_VERSION_0_61_09); // SVN r2000
 177         ADD_VALUENODE(ValueNode_RealString,               "realstring",           _("Real String"),              RELEASE_VERSION_0_61_09); // SVN r2003
 178         ADD_VALUENODE(ValueNode_Join,                     "join",                         _("Joined List"),              RELEASE_VERSION_0_61_09); // SVN r2007
 179         ADD_VALUENODE(ValueNode_AngleString,      "anglestring",          _("Angle String"),     RELEASE_VERSION_0_61_09); // SVN r2010
 180         ADD_VALUENODE(ValueNode_IntString,                "intstring",            _("Int String"),               RELEASE_VERSION_0_61_09); // SVN r2010
 181         ADD_VALUENODE(ValueNode_Logarithm,                "logarithm",            _("Logarithm"),                RELEASE_VERSION_0_61_09); // SVN r2034
 182
 183         ADD_VALUENODE(ValueNode_Greyed,                   "greyed",                       _("Greyed"),                   RELEASE_VERSION_0_62_00); // SVN r2305
 184         ADD_VALUENODE(ValueNode_Pow,                  "power",                _("Power"),                    RELEASE_VERSION_0_62_00); // SVN r2362
 185         ADD_VALUENODE(ValueNode_Compare,                  "compare",              _("Compare"),                  RELEASE_VERSION_0_62_00); // SVN r2364
 186         ADD_VALUENODE(ValueNode_Not,                  "not",                      _("Not"),                              RELEASE_VERSION_0_62_00); // SVN r2364
 187         ADD_VALUENODE(ValueNode_And,                  "and",                      _("And"),                              RELEASE_VERSION_0_62_00); // SVN r2364
 188         ADD_VALUENODE(ValueNode_Or,                       "or",                   _("Or"),                                       RELEASE_VERSION_0_62_00); // SVN r2364
 189
 190 #undef ADD_VALUENODE
 191 #undef ADD_VALUENODE2
 192
 193         return true;
 194 }
 195
 196 bool
 197 ValueNode::subsys_stop()
 198 {
 199         delete book_;
 200         return true;
 201 }
 202
 203 ValueNode::ValueNode(ValueBase::Type type):type(type)
 204 {
 205         value_node_count++;
 206 }
 207
 208 LinkableValueNode::Book&
 209 LinkableValueNode::book()
 210 {
 211         return *book_;
 212 }
 213
 214 LinkableValueNode::Handle
 215 LinkableValueNode::create(const String &name, const ValueBase& x)
 216 {
 217         if(!book().count(name))
 218                 return 0;
 219
 220         if (!check_type(name, x.get_type()) &&
 221                 // the Duplicate ValueNode is an exception - we don't want the
 222                 // user creating it for themselves, so check_type() fails for
 223                 // it even when it is valid
 224                 !(name == "duplicate" && x.get_type() == ValueBase::TYPE_REAL))
 225         {
 226                 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());
 227                 return 0;
 228         }
 229
 230         return book()[name].factory(x);
 231 }
 232
 233 bool
 234 LinkableValueNode::check_type(const String &name, ValueBase::Type x)
 235 {
 236         if(!book().count(name) || !book()[name].check_type)
 237                 return false;
 238         return book()[name].check_type(x);
 239 }
 240
 241 bool
 242 LinkableValueNode::set_link(int i,ValueNode::Handle x)
 243 {
 244         ValueNode::Handle previous(get_link(i));
 245
 246         if(set_link_vfunc(i,x))
 247         {
 248                 // Fix 2412072: remove the previous link from the parent_set unless one of the other links is also
 249                 // using it when we convert a value to 'switch', both 'on' and 'off' are linked to the same valuenode
 250                 // if we then disconnect one of the two, the one we disconnect is set to be a new valuenode_const
 251                 // and the previously shared value is removed from the parent set even though the other is still
 252                 // using it
 253                 if(previous)
 254                 {
 255                         int size = link_count(), index;
 256                         for (index=0; index < size; ++index)
 257                         {
 258                                 if (i == index) continue;
 259                                 if (get_link(index) == previous)
 260                                         break;
 261                         }
 262                         if (index == size)
 263                                 remove_child(previous.get());
 264                 }
 265                 add_child(x.get());
 266
 267                 if(!x->is_exported() && get_parent_canvas())
 268                 {
 269                         x->set_parent_canvas(get_parent_canvas());
 270                 }
 271                 changed();
 272                 return true;
 273         }
 274         return false;
 275 }
 276
 277 ValueNode::LooseHandle
 278 LinkableValueNode::get_link(int i)const
 279 {
 280         return get_link_vfunc(i);
 281 }
 282
 283 void
 284 LinkableValueNode::unlink_all()
 285 {
 286         for(int i=0;i<link_count();i++)
 287         {
 288                 ValueNode::LooseHandle value_node(get_link(i));
 289                 if(value_node)
 290                         value_node->parent_set.erase(this);
 291         }
 292 }
 293
 294 ValueNode::~ValueNode()
 295 {
 296         value_node_count--;
 297
 298         begin_delete();
 299 }
 300
 301 void
 302 ValueNode::on_changed()
 303 {
 304         etl::loose_handle<Canvas> parent_canvas = get_parent_canvas();
 305         if(parent_canvas)
 306                 do                                              // signal to all the ancestor canvases
 307                         parent_canvas->signal_value_node_changed()(this);
 308                 while (parent_canvas = parent_canvas->parent());
 309         else if(get_root_canvas())
 310                 get_root_canvas()->signal_value_node_changed()(this);
 311
 312         Node::on_changed();
 313 }
 314
 315 int
 316 ValueNode::replace(etl::handle<ValueNode> x)
 317 {
 318         if(x.get()==this)
 319                 return 0;
 320
 321         while(parent_set.size())
 322         {
 323                 (*parent_set.begin())->add_child(x.get());
 324                 (*parent_set.begin())->remove_child(this);
 325                 //x->parent_set.insert(*parent_set.begin());
 326                 //parent_set.erase(parent_set.begin());
 327         }
 328         int r(RHandle(this).replace(x));
 329         x->changed();
 330         return r;
 331 }
 332
 333 void
 334 ValueNode::set_id(const String &x)
 335 {
 336         if(name!=x)
 337         {
 338                 name=x;
 339                 signal_id_changed_();
 340         }
 341 }
 342
 343 String
 344 ValueNode::get_description(bool show_exported_name)const
 345 {
 346         String ret(_("ValueNode"));
 347
 348         if (dynamic_cast<const LinkableValueNode*>(this))
 349                 return (dynamic_cast<const LinkableValueNode*>(this))->get_description(-1, show_exported_name);
 350
 351         if (show_exported_name && !is_exported())
 352                 show_exported_name = false;
 353
 354         if (show_exported_name)
 355                 ret += strprintf(" (%s)", get_id().c_str());
 356
 357         return ret;
 358 }
 359
 360 ValueNodeList::ValueNodeList():
 361         placeholder_count_(0)
 362 {
 363 }
 364
 365 bool
 366 ValueNodeList::count(const String &id)const
 367 {
 368         const_iterator iter;
 369
 370         if(id.empty())
 371                 return false;
 372
 373         for(iter=begin();iter!=end() && id!=(*iter)->get_id();++iter)
 374                 ;
 375
 376         if(iter==end())
 377                 return false;
 378
 379         return true;
 380 }
 381
 382 ValueNode::Handle
 383 ValueNodeList::find(const String &id)
 384 {
 385         iterator iter;
 386
 387         if(id.empty())
 388                 throw Exception::IDNotFound("Empty ID");
 389
 390         for(iter=begin();iter!=end() && id!=(*iter)->get_id();++iter)
 391                 ;
 392
 393         if(iter==end())
 394                 throw Exception::IDNotFound("ValueNode in ValueNodeList: "+id);
 395
 396         return *iter;
 397 }
 398
 399 ValueNode::ConstHandle
 400 ValueNodeList::find(const String &id)const
 401 {
 402         const_iterator iter;
 403
 404         if(id.empty())
 405                 throw Exception::IDNotFound("Empty ID");
 406
 407         for(iter=begin();iter!=end() && id!=(*iter)->get_id();++iter)
 408                 ;
 409
 410         if(iter==end())
 411                 throw Exception::IDNotFound("ValueNode in ValueNodeList: "+id);
 412
 413         return *iter;
 414 }
 415
 416 ValueNode::Handle
 417 ValueNodeList::surefind(const String &id)
 418 {
 419         if(id.empty())
 420                 throw Exception::IDNotFound("Empty ID");
 421
 422         ValueNode::Handle value_node;
 423
 424         try
 425         {
 426                 value_node=find(id);
 427         }
 428         catch(Exception::IDNotFound)
 429         {
 430                 value_node=PlaceholderValueNode::create();
 431                 value_node->set_id(id);
 432                 push_back(value_node);
 433                 placeholder_count_++;
 434         }
 435
 436         return value_node;
 437 }
 438
 439 bool
 440 ValueNodeList::erase(ValueNode::Handle value_node)
 441 {
 442         assert(value_node);
 443
 444         iterator iter;
 445
 446         for(iter=begin();iter!=end();++iter)
 447                 if(value_node.get()==iter->get())
 448                 {
 449                         std::list<ValueNode::RHandle>::erase(iter);
 450                         if(PlaceholderValueNode::Handle::cast_dynamic(value_node))
 451                                 placeholder_count_--;
 452                         return true;
 453                 }
 454         return false;
 455 }
 456
 457 bool
 458 ValueNodeList::add(ValueNode::Handle value_node)
 459 {
 460         if(!value_node)
 461                 return false;
 462         if(value_node->get_id().empty())
 463                 return false;
 464
 465         try
 466         {
 467                 ValueNode::RHandle other_value_node=find(value_node->get_id());
 468                 if(PlaceholderValueNode::Handle::cast_dynamic(other_value_node))
 469                 {
 470                         other_value_node->replace(value_node);
 471                         placeholder_count_--;
 472                         return true;
 473                 }
 474
 475                 return false;
 476         }
 477         catch(Exception::IDNotFound)
 478         {
 479                 push_back(value_node);
 480                 return true;
 481         }
 482
 483         return false;
 484 }
 485
 486 void
 487 ValueNodeList::audit()
 488 {
 489         iterator iter,next;
 490
 491         for(next=begin(),iter=next++;iter!=end();iter=next++)
 492                 if(iter->count()==1)
 493                         std::list<ValueNode::RHandle>::erase(iter);
 494 }
 495
 496
 497 String
 498 PlaceholderValueNode::get_name()const
 499 {
 500         return "placeholder";
 501 }
 502
 503 String
 504 PlaceholderValueNode::get_local_name()const
 505 {
 506         return _("Placeholder");
 507 }
 508
 509 ValueNode*
 510 PlaceholderValueNode::clone(const GUID& deriv_guid)const
 511 {
 512         ValueNode* ret(new PlaceholderValueNode());
 513         ret->set_guid(get_guid()^deriv_guid);
 514         return ret;
 515 }
 516
 517 PlaceholderValueNode::Handle
 518 PlaceholderValueNode::create(ValueBase::Type type)
 519 {
 520         return new PlaceholderValueNode(type);
 521 }
 522
 523 ValueBase
 524 PlaceholderValueNode::operator()(Time /*t*/)const
 525 {
 526         assert(0);
 527         return ValueBase();
 528 }
 529
 530 PlaceholderValueNode::PlaceholderValueNode(ValueBase::Type type):
 531         ValueNode(type)
 532 {
 533 }
 534
 535 ValueNode*
 536 LinkableValueNode::clone(const GUID& deriv_guid)const
 537 {
 538         {
 539                 ValueNode* x(find_value_node(get_guid()^deriv_guid).get());
 540                 if(x)
 541                         return x;
 542         }
 543
 544         int i;
 545         LinkableValueNode *ret=create_new();
 546         ret->set_guid(get_guid()^deriv_guid);
 547
 548         for(i=0;i<link_count();i++)
 549         {
 550                 ValueNode::Handle link=get_link_vfunc(i);
 551                 if(!link->is_exported())
 552                 {
 553                         ValueNode::LooseHandle value_node(find_value_node(link->get_guid()^deriv_guid));
 554                         if(!value_node)
 555                                 value_node=link->clone(deriv_guid);
 556                         ret->set_link(i,value_node);
 557                 }
 558                 else
 559                         ret->set_link(i,link);
 560         }
 561
 562         return ret;
 563 }
 564
 565 String
 566 ValueNode::get_relative_id(etl::loose_handle<const Canvas> x)const
 567 {
 568         assert(is_exported());
 569         assert(canvas_);
 570
 571         if(x.get()==canvas_.get())
 572                 return get_id();
 573
 574         return canvas_->_get_relative_id(x)+':'+get_id();
 575 }
 576
 577 void
 578 ValueNode::set_parent_canvas(etl::loose_handle<Canvas> x)
 579 {
 580         canvas_=x; if(x) root_canvas_=x->get_root();
 581 }
 582
 583 void
 584 ValueNode::set_root_canvas(etl::loose_handle<Canvas> x)
 585 {
 586         root_canvas_=x->get_root();
 587 }
 588
 589 void LinkableValueNode::get_times_vfunc(Node::time_set &set) const
 590 {
 591         ValueNode::LooseHandle  h;
 592
 593         int size = link_count();
 594
 595         //just add it to the set...
 596         for(int i=0; i < size; ++i)
 597         {
 598                 h = get_link(i);
 599
 600                 if(h)
 601                 {
 602                         const Node::time_set &tset = h->get_times();
 603                         set.insert(tset.begin(),tset.end());
 604                 }
 605         }
 606 }
 607
 608 String
 609 LinkableValueNode::get_description(int index, bool show_exported_name)const
 610 {
 611         String description;
 612
 613         if (index == -1)
 614         {
 615                 if (show_exported_name && is_exported())
 616                         description += strprintf(" (%s)", get_id().c_str());
 617         }
 618         else
 619         {
 620                 description = String(":") + link_local_name(index);
 621
 622                 if (show_exported_name)
 623                 {
 624                         ValueNode::LooseHandle link(get_link(index));
 625                         if (link->is_exported())
 626                                 description += strprintf(" (%s)", link->get_id().c_str());
 627                 }
 628         }
 629
 630         const synfig::Node* node = this;
 631         LinkableValueNode::ConstHandle parent_linkable_vn = 0;
 632
 633         // walk up through the valuenodes trying to find the layer at the top
 634         while (!node->parent_set.empty() && !dynamic_cast<const Layer*>(node))
 635         {
 636                 LinkableValueNode::ConstHandle linkable_value_node(dynamic_cast<const LinkableValueNode*>(node));
 637                 if (linkable_value_node)
 638                 {
 639                         String link;
 640                         int cnt = linkable_value_node->link_count();
 641                         for (int i = 0; i < cnt; i++)
 642                                 if (linkable_value_node->get_link(i) == parent_linkable_vn)
 643                                 {
 644                                         link = String(":") + linkable_value_node->link_local_name(i);
 645                                         break;
 646                                 }
 647
 648                         description = linkable_value_node->get_local_name() + link + (parent_linkable_vn?">":"") + description;
 649                 }
 650                 node = *node->parent_set.begin();
 651                 parent_linkable_vn = linkable_value_node;
 652         }
 653
 654         Layer::ConstHandle parent_layer(dynamic_cast<const Layer*>(node));
 655         if(parent_layer)
 656         {
 657                 String param;
 658                 const Layer::DynamicParamList &dynamic_param_list(parent_layer->dynamic_param_list());
 659                 // loop to find the parameter in the dynamic parameter list - this gives us its name
 660                 for (Layer::DynamicParamList::const_iterator iter = dynamic_param_list.begin(); iter != dynamic_param_list.end(); iter++)
 661                         if (iter->second == parent_linkable_vn)
 662                                 param = String(":") + parent_layer->get_param_local_name(iter->first);
 663                 description = strprintf("(%s)%s>%s",
 664                                                                 parent_layer->get_non_empty_description().c_str(),
 665                                                                 param.c_str(),
 666                                                                 description.c_str());
 667         }
 668
 669         return description;
 670 }
 671
 672 /*
 673 int
 674 LinkableValueNode::link_count()const
 675 {
 676         Vocab ret(get_param_vocab());
 677         return ret.size();
 678 }
 679 */