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