synfig-core/trunk/src/synfig/loadcanvas.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file loadcanvas.cpp
   3 **      \brief writeme
   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) 2009 Carlos A. Sosa Navarro
  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 <cstdlib>
  35 #include <cstdio>
  36 #include <cstring>
  37 #include <ETL/stringf>
  38 #include <libxml++/libxml++.h>
  39 #include <vector>
  40 #include <stdexcept>
  41 #include <iostream>
  42
  43 #include "layer_pastecanvas.h"
  44 #include "loadcanvas.h"
  45 #include "valuenode.h"
  46 #include "valuenode_subtract.h"
  47 #include "valuenode_animated.h"
  48 #include "valuenode_composite.h"
  49 #include "valuenode_const.h"
  50 #include "valuenode_linear.h"
  51 #include "valuenode_dynamiclist.h"
  52 #include "valuenode_reference.h"
  53 #include "valuenode_scale.h"
  54 #include "valuenode_timedswap.h"
  55 #include "valuenode_twotone.h"
  56 #include "valuenode_stripes.h"
  57 #include "valuenode_segcalctangent.h"
  58 #include "valuenode_segcalcvertex.h"
  59 #include "valuenode_bline.h"
  60
  61 #include "layer.h"
  62 #include "string.h"
  63
  64 #include "exception.h"
  65
  66 #include "gradient.h"
  67
  68 #include <map>
  69 #include <sigc++/bind.h>
  70
  71 #endif
  72
  73 /* === U S I N G =========================================================== */
  74
  75 using namespace std;
  76 using namespace synfig;
  77 using namespace etl;
  78
  79 /*
  80 class test_class {
  81 static int bleh;
  82 public:
  83         test_class() { assert(!bleh); bleh++; synfig::info("test_class: initi: %d",bleh); }
  84         ~test_class() { assert(bleh); synfig::info("test_class: uninit: %d",bleh); bleh--; }
  85 };
  86 int test_class::bleh(0);
  87
  88 test_class test_class_instance;
  89 */
  90
  91 /* === M A C R O S ========================================================= */
  92
  93 #define VALUENODE_COMPATIBILITY_URL "http://synfig.org/Convert#Compatibility"
  94
  95 inline bool is_whitespace(char x) { return ((x)=='\n' || (x)=='\t' || (x)==' '); }
  96
  97 std::set<String> CanvasParser::loading_;
  98
  99 /* === P R O C E D U R E S ================================================= */
 100
 101 static std::map<String, Canvas::LooseHandle>* open_canvas_map_(0);
 102
 103 std::map<synfig::String, etl::loose_handle<Canvas> >& synfig::get_open_canvas_map()
 104 {
 105         if(!open_canvas_map_)
 106                 open_canvas_map_=new std::map<String, Canvas::LooseHandle>;
 107         return *open_canvas_map_;
 108 }
 109
 110 static void _remove_from_open_canvas_map(Canvas *x) { get_open_canvas_map().erase(etl::absolute_path(x->get_file_name())); }
 111
 112 static void _canvas_file_name_changed(Canvas *x)
 113 {
 114         std::map<synfig::String, etl::loose_handle<Canvas> >::iterator iter;
 115
 116         for(iter=get_open_canvas_map().begin();iter!=get_open_canvas_map().end();++iter)
 117                 if(iter->second==x)
 118                         break;
 119         assert(iter!=get_open_canvas_map().end());
 120         if(iter==get_open_canvas_map().end())
 121                 return;
 122         get_open_canvas_map().erase(iter->first);
 123         get_open_canvas_map()[etl::absolute_path(x->get_file_name())]=x;
 124
 125 }
 126
 127 Canvas::Handle
 128 synfig::open_canvas(const String &filename,String &errors,String &warnings)
 129 {
 130         return open_canvas_as(filename, filename, errors, warnings);
 131 }
 132
 133 Canvas::Handle
 134 synfig::open_canvas_as(const String &filename,const String &as,String &errors,String &warnings)
 135 {
 136         if (CanvasParser::loading_.count(filename))
 137         {
 138                 String warning(strprintf(_("cannot load '%s' recursively"), filename.c_str()));
 139                 synfig::warning(warning);
 140                 warnings = "  * " + warning + "\n";
 141                 Canvas::Handle canvas(Canvas::create());
 142                 canvas->set_file_name(filename);
 143                 Layer::Handle paste(Layer_PasteCanvas::create());
 144                 canvas->push_back(paste);
 145                 paste->set_description(warning);
 146                 return canvas;
 147         }
 148
 149         Canvas::Handle canvas;
 150         CanvasParser parser;
 151         parser.set_allow_errors(true);
 152
 153         try
 154         {
 155                 CanvasParser::loading_.insert(filename);
 156                 canvas=parser.parse_from_file_as(filename,as,errors);
 157         }
 158         catch (...)
 159         {
 160                 CanvasParser::loading_.erase(filename);
 161                 throw;
 162         }
 163         CanvasParser::loading_.erase(filename);
 164
 165         warnings = parser.get_warnings_text();
 166
 167         if(parser.error_count())
 168         {
 169                 errors = parser.get_errors_text();
 170                 return Canvas::Handle();
 171         }
 172
 173         return canvas;
 174 }
 175
 176 /* === M E T H O D S ======================================================= */
 177
 178 void
 179 CanvasParser::error_unexpected_element(xmlpp::Node *element,const String &got, const String &expected)
 180 {
 181         error(element,strprintf(_("Unexpected element <%s>, Expected <%s>"),got.c_str(),expected.c_str()));
 182 }
 183
 184 void
 185 CanvasParser::error_unexpected_element(xmlpp::Node *element,const String &got)
 186 {
 187         error(element,strprintf(_("Unexpected element <%s>"),got.c_str()));
 188 }
 189
 190 void
 191 CanvasParser::warning(xmlpp::Node *element, const String &text)
 192 {
 193         string str=strprintf("%s:<%s>:%d: ",filename.c_str(),element->get_name().c_str(),element->get_line())+text;
 194
 195         synfig::warning(str);
 196         // cerr<<str<<endl;
 197
 198         total_warnings_++;
 199         warnings_text += "  * " + str + "\n";
 200         if(total_warnings_>=max_warnings_)
 201                 fatal_error(element, _("Too many warnings"));
 202 }
 203
 204 void
 205 CanvasParser::error(xmlpp::Node *element, const String &text)
 206 {
 207         string str=strprintf("%s:<%s>:%d: error: ",filename.c_str(),element->get_name().c_str(),element->get_line())+text;
 208         total_errors_++;
 209         errors_text += "  * " + str + "\n";
 210         if(!allow_errors_)
 211                 throw runtime_error(str);
 212         cerr<<str<<endl;
 213         //      synfig::error(str);
 214 }
 215
 216 void
 217 CanvasParser::fatal_error(xmlpp::Node *element, const String &text)
 218 {
 219         string str=strprintf("%s:<%s>:%d:",filename.c_str(),element->get_name().c_str(),element->get_line())+text;
 220         throw runtime_error(str);
 221 }
 222
 223
 224
 225 Keyframe
 226 CanvasParser::parse_keyframe(xmlpp::Element *element,Canvas::Handle canvas)
 227 {
 228         assert(element->get_name()=="keyframe");
 229
 230         if(!element->get_attribute("time"))
 231         {
 232                 error(element,strprintf(_("<%s> is missing \"%s\" attribute"),"real","time"));
 233                 return Keyframe();
 234         }
 235
 236         Keyframe ret(Time(element->get_attribute("time")->get_value(),canvas->rend_desc().get_frame_rate()));
 237
 238
 239         if(element->get_children().empty())
 240                 return ret;
 241
 242         if(element->get_child_text()->get_content().empty())
 243                 return ret;
 244
 245         ret.set_description(element->get_child_text()->get_content());
 246
 247         return ret;
 248 }
 249
 250
 251 Real
 252 CanvasParser::parse_real(xmlpp::Element *element)
 253 {
 254         assert(element->get_name()=="real");
 255
 256         if(!element->get_children().empty())
 257                 warning(element, strprintf(_("<%s> should not contain anything"),"real"));
 258
 259         if(!element->get_attribute("value"))
 260         {
 261                 error(element,strprintf(_("<%s> is missing \"value\" attribute"),"real"));
 262                 return false;
 263         }
 264
 265         string val=element->get_attribute("value")->get_value();
 266
 267         return atof(val.c_str());
 268 }
 269
 270 Time
 271 CanvasParser::parse_time(xmlpp::Element *element,Canvas::Handle canvas)
 272 {
 273         assert(element->get_name()=="time");
 274
 275         if(!element->get_children().empty())
 276                 warning(element, strprintf(_("<%s> should not contain anything"),"time"));
 277
 278         if(!element->get_attribute("value"))
 279         {
 280                 error(element,strprintf(_("<%s> is missing \"value\" attribute"),"time"));
 281                 return false;
 282         }
 283
 284         string val=element->get_attribute("value")->get_value();
 285
 286         return Time(val,canvas->rend_desc().get_frame_rate());
 287 }
 288
 289 int
 290 CanvasParser::parse_integer(xmlpp::Element *element)
 291 {
 292         assert(element->get_name()=="integer");
 293
 294         if(!element->get_children().empty())
 295                 warning(element, strprintf(_("<%s> should not contain anything"),"integer"));
 296
 297         if(!element->get_attribute("value"))
 298         {
 299                 error(element,strprintf(_("<%s> is missing \"value\" attribute"),"integer"));
 300                 return false;
 301         }
 302
 303         string val=element->get_attribute("value")->get_value();
 304
 305         return atoi(val.c_str());
 306 }
 307
 308 // see 'minor hack' at the end of parse_vector() below
 309 // making this 'static' to give it file local scope
 310 // stops it working (where working means working around
 311 // bug #1509627)
 312 Vector &canvas_parser_vector_id(Vector &vector)
 313 {
 314         return vector;
 315 }
 316
 317 Vector
 318 CanvasParser::parse_vector(xmlpp::Element *element)
 319 {
 320         assert(element->get_name()=="vector");
 321
 322         if(element->get_children().empty())
 323         {
 324                 error(element, "Undefined value in <vector>");
 325                 return Vector();
 326         }
 327
 328         Vector vect;
 329
 330         xmlpp::Element::NodeList list = element->get_children();
 331         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 332         {
 333                 xmlpp::Element *child=dynamic_cast<xmlpp::Element*>((xmlpp::Node*)*iter);
 334                 if(!child)
 335                         continue;
 336                 else
 337                 if(child->get_name()=="x")
 338                 {
 339                         if(child->get_children().empty())
 340                         {
 341                                 error(element, "Undefined value in <x>");
 342                                 return Vector();
 343                         }
 344                         vect[0]=atof(child->get_child_text()->get_content().c_str());
 345                 }
 346                 else
 347                 if(child->get_name()=="y")
 348                 {
 349                         if(child->get_children().empty())
 350                         {
 351                                 error(element, "Undefined value in <y>");
 352                                 return Vector();
 353                         }
 354                         vect[1]=atof(child->get_child_text()->get_content().c_str());
 355                 }
 356                 else
 357                         error_unexpected_element(child,child->get_name());
 358         }
 359         // Minor hack - gcc 4.1.2 and earlier think that we're not using
 360         // 'vect' and optimize it out at -O2 and higher.  This convinces
 361         // them that we are really using it.
 362         return canvas_parser_vector_id(vect);
 363         // When the bug is fixed, we can just do this instead:
 364         // return vect;
 365 }
 366
 367 Color
 368 CanvasParser::parse_color(xmlpp::Element *element)
 369 {
 370         assert(element->get_name()=="color");
 371
 372         if(element->get_children().empty())
 373         {
 374                 error(element, "Undefined value in <color>");
 375                 return Color();
 376         }
 377
 378         Color color(0);
 379
 380         xmlpp::Element::NodeList list = element->get_children();
 381         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 382         {
 383                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 384                 if(!child)
 385                         continue;
 386                 else
 387                 if(child->get_name()=="r")
 388                 {
 389                         if(child->get_children().empty())
 390                         {
 391                                 error(element, "Undefined value in <r>");
 392                                 return Color();
 393                         }
 394                         color.set_r(atof(child->get_child_text()->get_content().c_str()));
 395                 }
 396                 else
 397                 if(child->get_name()=="g")
 398                 {
 399                         if(child->get_children().empty())
 400                         {
 401                                 error(element, "Undefined value in <g>");
 402                                 return Color();
 403                         }
 404                         color.set_g(atof(child->get_child_text()->get_content().c_str()));
 405                 }
 406                 else
 407                 if(child->get_name()=="b")
 408                 {
 409                         if(child->get_children().empty())
 410                         {
 411                                 error(element, "Undefined value in <b>");
 412                                 return Color();
 413                         }
 414                         color.set_b(atof(child->get_child_text()->get_content().c_str()));
 415                 }
 416                 else
 417                 if(child->get_name()=="a")
 418                 {
 419                         if(child->get_children().empty())
 420                         {
 421                                 error(element, "Undefined value in <a>");
 422                                 return Color();
 423                         }
 424                         color.set_a(atof(child->get_child_text()->get_content().c_str()));
 425                 }
 426                 else
 427                         error_unexpected_element(child,child->get_name());
 428         }
 429
 430         return color;
 431 }
 432
 433 synfig::String
 434 CanvasParser::parse_string(xmlpp::Element *element)
 435 {
 436         assert(element->get_name()=="string");
 437
 438         if(element->get_children().empty())
 439         {
 440                 warning(element, "Undefined value in <string>");
 441                 return synfig::String();
 442         }
 443
 444         if(element->get_child_text()->get_content().empty())
 445         {
 446                 warning(element, "Content element of <string> appears to be empty");
 447                 return synfig::String();
 448         }
 449
 450         return element->get_child_text()->get_content();
 451 }
 452
 453 bool
 454 CanvasParser::parse_bool(xmlpp::Element *element)
 455 {
 456         assert(element->get_name()=="bool");
 457
 458         if(!element->get_children().empty())
 459                 warning(element, strprintf(_("<%s> should not contain anything"),"bool"));
 460
 461         if(!element->get_attribute("value"))
 462         {
 463                 error(element,strprintf(_("<%s> is missing \"value\" attribute"),"bool"));
 464                 return false;
 465         }
 466
 467         string val=element->get_attribute("value")->get_value();
 468
 469         if(val=="true" || val=="1")
 470                 return true;
 471         if(val=="false" || val=="0")
 472                 return false;
 473
 474         error(element,strprintf(_("Bad value \"%s\" in <%s>"),val.c_str(),"bool"));
 475
 476         return false;
 477 }
 478
 479 Gradient
 480 CanvasParser::parse_gradient(xmlpp::Element *node)
 481 {
 482         assert(node->get_name()=="gradient");
 483         Gradient ret;
 484
 485         xmlpp::Element::NodeList list = node->get_children();
 486         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 487         {
 488                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 489                 if(!child)
 490                         continue;
 491                 else
 492                 {
 493                         Gradient::CPoint cpoint;
 494                         cpoint.color=parse_color(child);
 495
 496                         if(!child->get_attribute("pos"))
 497                         {
 498                                 error(child,strprintf(_("<%s> is missing \"pos\" attribute"),"gradient"));
 499                                 return Gradient();
 500                         }
 501
 502                         cpoint.pos=atof(child->get_attribute("pos")->get_value().c_str());
 503
 504                         ret.push_back(cpoint);
 505                 }
 506         }
 507         ret.sort();
 508         return ret;
 509 }
 510
 511 ValueBase
 512 CanvasParser::parse_list(xmlpp::Element *element,Canvas::Handle canvas)
 513 {
 514         vector<ValueBase> value_list;
 515
 516         xmlpp::Element::NodeList list = element->get_children();
 517         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 518         {
 519                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 520                 if(!child)
 521                         continue;
 522                 else
 523                 {
 524                         value_list.push_back(parse_value(child,canvas));
 525                         if(!value_list.back().is_valid())
 526                         {
 527                                 value_list.pop_back();
 528                                 error(child,"Bad ValueBase");
 529                                 continue;
 530                         }
 531                 }
 532         }
 533         return value_list;
 534 }
 535
 536 Segment
 537 CanvasParser::parse_segment(xmlpp::Element *element)
 538 {
 539         assert(element->get_name()=="segment");
 540
 541         if(element->get_children().empty())
 542         {
 543                 error(element, "Undefined value in <segment>");
 544                 return Segment();
 545         }
 546
 547         Segment seg;
 548
 549         xmlpp::Element::NodeList list = element->get_children();
 550         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 551         {
 552                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 553                 if(!child)
 554                         continue;
 555                 else
 556                 if(child->get_name()=="p1")
 557                 {
 558                         xmlpp::Element::NodeList list = child->get_children();
 559                         xmlpp::Element::NodeList::iterator iter;
 560
 561                         // Search for the first non-text XML element
 562                         for(iter = list.begin(); iter != list.end(); ++iter)
 563                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 564
 565                         if(iter==list.end())
 566                         {
 567                                 error(element, "Undefined value in <p1>");
 568                                 continue;
 569                         }
 570
 571                         if((*iter)->get_name()!="vector")
 572                         {
 573                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 574                                 continue;
 575                         }
 576
 577                         seg.p1=parse_vector(dynamic_cast<xmlpp::Element*>(*iter));
 578                 }
 579                 else
 580                 if(child->get_name()=="t1")
 581                 {
 582                         xmlpp::Element::NodeList list = child->get_children();
 583                         xmlpp::Element::NodeList::iterator iter;
 584
 585                         // Search for the first non-text XML element
 586                         for(iter = list.begin(); iter != list.end(); ++iter)
 587                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 588
 589                         if(iter==list.end())
 590                         {
 591                                 error(element, "Undefined value in <t1>");
 592                                 continue;
 593                         }
 594
 595                         if((*iter)->get_name()!="vector")
 596                         {
 597                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 598                                 continue;
 599                         }
 600
 601                         seg.t1=parse_vector(dynamic_cast<xmlpp::Element*>(*iter));
 602                 }
 603                 else
 604                 if(child->get_name()=="p2")
 605                 {
 606                         xmlpp::Element::NodeList list = child->get_children();
 607                         xmlpp::Element::NodeList::iterator iter;
 608
 609                         // Search for the first non-text XML element
 610                         for(iter = list.begin(); iter != list.end(); ++iter)
 611                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 612
 613                         if(iter==list.end())
 614                         {
 615                                 error(element, "Undefined value in <p2>");
 616                                 continue;
 617                         }
 618
 619                         if((*iter)->get_name()!="vector")
 620                         {
 621                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 622                                 continue;
 623                         }
 624
 625                         seg.p2=parse_vector(dynamic_cast<xmlpp::Element*>(*iter));
 626                 }
 627                 else
 628                 if(child->get_name()=="t2")
 629                 {
 630                         xmlpp::Element::NodeList list = child->get_children();
 631                         xmlpp::Element::NodeList::iterator iter;
 632
 633                         // Search for the first non-text XML element
 634                         for(iter = list.begin(); iter != list.end(); ++iter)
 635                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 636
 637                         if(iter==list.end())
 638                         {
 639                                 error(element, "Undefined value in <t2>");
 640                                 continue;
 641                         }
 642
 643                         if((*iter)->get_name()!="vector")
 644                         {
 645                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 646                                 continue;
 647                         }
 648
 649                         seg.t2=parse_vector(dynamic_cast<xmlpp::Element*>(*iter));
 650                 }
 651                 else
 652                         error_unexpected_element(child,child->get_name());
 653         }
 654         return seg;
 655 }
 656
 657 BLinePoint
 658 CanvasParser::parse_bline_point(xmlpp::Element *element)
 659 {
 660         assert(element->get_name()=="bline_point");
 661         if(element->get_children().empty())
 662         {
 663                 error(element, "Undefined value in <bline_point>");
 664                 return BLinePoint();
 665         }
 666
 667         BLinePoint ret;
 668         ret.set_split_tangent_flag(false);
 669
 670         xmlpp::Element::NodeList list = element->get_children();
 671         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 672         {
 673                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 674                 if(!child)
 675                         continue;
 676                 else
 677                 // Vertex
 678                 if(child->get_name()[0]=='v' || child->get_name()=="p1")
 679                 {
 680                         xmlpp::Element::NodeList list = child->get_children();
 681                         xmlpp::Element::NodeList::iterator iter;
 682
 683                         // Search for the first non-text XML element
 684                         for(iter = list.begin(); iter != list.end(); ++iter)
 685                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 686
 687                         if(iter==list.end())
 688                         {
 689                                 error(element, "Undefined value in <vertex>");
 690                                 continue;
 691                         }
 692
 693                         if((*iter)->get_name()!="vector")
 694                         {
 695                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 696                                 continue;
 697                         }
 698
 699                         ret.set_vertex(parse_vector(dynamic_cast<xmlpp::Element*>(*iter)));
 700                 }
 701                 else
 702                 // Tangent 1
 703                 if(child->get_name()=="t1" || child->get_name()=="tangent")
 704                 {
 705                         xmlpp::Element::NodeList list = child->get_children();
 706                         xmlpp::Element::NodeList::iterator iter;
 707
 708                         // Search for the first non-text XML element
 709                         for(iter = list.begin(); iter != list.end(); ++iter)
 710                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 711
 712                         if(iter==list.end())
 713                         {
 714                                 error(element, "Undefined value in <t1>");
 715                                 continue;
 716                         }
 717
 718                         if((*iter)->get_name()!="vector")
 719                         {
 720                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 721                                 continue;
 722                         }
 723
 724                         ret.set_tangent1(parse_vector(dynamic_cast<xmlpp::Element*>(*iter)));
 725                 }
 726                 else
 727                 // Tangent 2
 728                 if(child->get_name()=="t2")
 729                 {
 730                         xmlpp::Element::NodeList list = child->get_children();
 731                         xmlpp::Element::NodeList::iterator iter;
 732
 733                         // Search for the first non-text XML element
 734                         for(iter = list.begin(); iter != list.end(); ++iter)
 735                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 736
 737                         if(iter==list.end())
 738                         {
 739                                 error(element, "Undefined value in <t2>");
 740                                 continue;
 741                         }
 742
 743                         if((*iter)->get_name()!="vector")
 744                         {
 745                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 746                                 continue;
 747                         }
 748
 749                         ret.set_tangent2(parse_vector(dynamic_cast<xmlpp::Element*>(*iter)));
 750                         ret.set_split_tangent_flag(true);
 751                 }
 752                 else
 753                 // width
 754                 if(child->get_name()=="width")
 755                 {
 756                         xmlpp::Element::NodeList list = child->get_children();
 757                         xmlpp::Element::NodeList::iterator iter;
 758
 759                         // Search for the first non-text XML element
 760                         for(iter = list.begin(); iter != list.end(); ++iter)
 761                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 762
 763                         if(iter==list.end())
 764                         {
 765                                 error(element, "Undefined value in <width>");
 766                                 continue;
 767                         }
 768
 769                         if((*iter)->get_name()!="real")
 770                         {
 771                                 error_unexpected_element((*iter),(*iter)->get_name(),"real");
 772                                 continue;
 773                         }
 774
 775                         ret.set_width(parse_real(dynamic_cast<xmlpp::Element*>(*iter)));
 776                 }
 777                 else
 778                 // origin
 779                 if(child->get_name()=="origin")
 780                 {
 781                         xmlpp::Element::NodeList list = child->get_children();
 782                         xmlpp::Element::NodeList::iterator iter;
 783
 784                         // Search for the first non-text XML element
 785                         for(iter = list.begin(); iter != list.end(); ++iter)
 786                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 787
 788                         if(iter==list.end())
 789                         {
 790                                 error(element, "Undefined value in <origin>");
 791                                 continue;
 792                         }
 793
 794                         if((*iter)->get_name()!="real")
 795                         {
 796                                 error_unexpected_element((*iter),(*iter)->get_name(),"real");
 797                                 continue;
 798                         }
 799
 800                         ret.set_origin(parse_real(dynamic_cast<xmlpp::Element*>(*iter)));
 801                 }
 802                 else
 803                         error_unexpected_element(child,child->get_name());
 804         }
 805         return ret;
 806 }
 807
 808 Angle
 809 CanvasParser::parse_angle(xmlpp::Element *element)
 810 {
 811         assert(element->get_name()=="angle");
 812
 813         if(!element->get_children().empty())
 814                 warning(element, strprintf(_("<%s> should not contain anything"),"angle"));
 815
 816         if(!element->get_attribute("value"))
 817         {
 818                 error(element,strprintf(_("<%s> is missing \"value\" attribute"),"angle"));
 819                 return Angle();
 820         }
 821
 822         string val=element->get_attribute("value")->get_value();
 823
 824         return Angle::deg(atof(val.c_str()));
 825 }
 826
 827 ValueBase
 828 CanvasParser::parse_value(xmlpp::Element *element,Canvas::Handle canvas)
 829 {
 830         if(element->get_name()=="real")
 831                 return parse_real(element);
 832         else
 833         if(element->get_name()=="time")
 834                 return parse_time(element,canvas);
 835         else
 836         if(element->get_name()=="integer")
 837                 return parse_integer(element);
 838         else
 839         if(element->get_name()=="string")
 840                 return parse_string(element);
 841         else
 842         if(element->get_name()=="vector")
 843                 return parse_vector(element);
 844         else
 845         if(element->get_name()=="color")
 846                 return parse_color(element);
 847         else
 848         if(element->get_name()=="segment")
 849                 return parse_segment(element);
 850         else
 851         if(element->get_name()=="list")
 852                 return parse_list(element,canvas);
 853         else
 854         if(element->get_name()=="gradient")
 855                 return parse_gradient(element);
 856         else
 857         if(element->get_name()=="bool")
 858                 return parse_bool(element);
 859         else
 860         //if(element->get_name()=="canvas")
 861         //      return parse_canvas(element,canvas,true);       // inline canvas
 862         //else
 863         if(element->get_name()=="angle" || element->get_name()=="degrees" || element->get_name()=="radians" || element->get_name()=="rotations")
 864                 return parse_angle(element);
 865         else
 866         if(element->get_name()=="bline_point")
 867                 return parse_bline_point(element);
 868         else
 869         if(element->get_name()=="canvas")
 870                 return ValueBase(parse_canvas(element,canvas,true));
 871         else
 872         {
 873                 error_unexpected_element(element,element->get_name());
 874         }
 875
 876         return ValueBase();
 877 }
 878
 879
 880
 881
 882 ValueNode_Animated::Handle
 883 CanvasParser::parse_animated(xmlpp::Element *element,Canvas::Handle canvas)
 884 {
 885         assert(element->get_name()=="hermite" || element->get_name()=="animated");
 886
 887         if(!element->get_attribute("type"))
 888         {
 889                 error(element,"Missing attribute \"type\" in <animated>");
 890                 return ValueNode_Animated::Handle();
 891         }
 892
 893         ValueBase::Type type=ValueBase::ident_type(element->get_attribute("type")->get_value());
 894
 895         if(!type)
 896         {
 897                 error(element,"Bad type in <animated>");
 898                 return ValueNode_Animated::Handle();
 899         }
 900
 901         ValueNode_Animated::Handle value_node=ValueNode_Animated::create(type);
 902
 903         if(!value_node)
 904         {
 905                 error(element,strprintf(_("Unable to create <animated> with type \"%s\""),ValueBase::type_local_name(type).c_str()));
 906                 return ValueNode_Animated::Handle();
 907         }
 908
 909         value_node->set_root_canvas(canvas->get_root());
 910
 911         xmlpp::Element::NodeList list = element->get_children();
 912         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 913         {
 914                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 915                 if(!child)
 916                         continue;
 917                 else
 918                 if(child->get_name()=="waypoint")
 919                 {
 920                         if(!child->get_attribute("time"))
 921                         {
 922                                 error(child,_("<waypoint> is missing attribute \"time\""));
 923                                 continue;
 924                         }
 925
 926                         Time time(child->get_attribute("time")->get_value(),canvas->rend_desc().get_frame_rate());
 927
 928
 929                         ValueNode::Handle waypoint_value_node;
 930                         xmlpp::Element::NodeList list = child->get_children();
 931
 932                         if(child->get_attribute("use"))
 933                         {
 934                                 if(!list.empty())
 935                                         warning(child,_("Found \"use\" attribute for <waypoint>, but it wasn't empty. Ignoring contents..."));
 936
 937                                 // the waypoint might look like this, in which case we won't find "mycanvas" in the list of valuenodes, 'cos it's a canvas
 938                                 //
 939                                 //      <animated type="canvas">
 940                                 //        <waypoint time="0s" use="mycanvas"/>
 941                                 //      </animated>
 942                                 if (type==ValueBase::TYPE_CANVAS)
 943                                 {
 944                                         String warnings;
 945                                         waypoint_value_node=ValueNode_Const::create(canvas->surefind_canvas(child->get_attribute("use")->get_value(), warnings));
 946                                         warnings_text += warnings;
 947                                 }
 948                                 else
 949                                         waypoint_value_node=canvas->surefind_value_node(child->get_attribute("use")->get_value());
 950                         }
 951                         else
 952                         {
 953                                 if(child->get_children().empty())
 954                                 {
 955                                         error(child, strprintf(_("<%s> is missing its data"),"waypoint"));
 956                                         continue;
 957                                 }
 958
 959                                 xmlpp::Element::NodeList::iterator iter;
 960
 961                                 // Search for the first non-text XML element
 962                                 for(iter = list.begin(); iter != list.end(); ++iter)
 963                                         if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 964
 965                                 if(iter==list.end())
 966                                 {
 967                                         error(child, strprintf(_("<%s> is missing its data"),"waypoint"));
 968                                         continue;
 969                                 }
 970
 971                                 waypoint_value_node=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
 972
 973                                 /*
 974                                 ValueBase data=parse_value(dynamic_cast<xmlpp::Element*>(*iter),canvas);
 975
 976                                 if(!data.is_valid())
 977                                 {
 978                                         error(child,_("Bad data for <waypoint>"));
 979                                         continue;
 980                                 }
 981                                 */
 982                                 if(!waypoint_value_node)
 983                                 {
 984                                         error(child,_("Bad data for <waypoint>"));
 985                                         continue;
 986                                 }
 987
 988                                 /*! HACK -- This is a temporary fix to help repair some
 989                                 **      weirdness that is currently going on (10-21-2004).
 990                                 **      This short circuits the linking of waypoints,
 991                                 **      a feature which is so obscure that we can get
 992                                 **      away with something like this pretty easily.
 993                                 */
 994                                 waypoint_value_node=waypoint_value_node->clone();
 995
 996                                 // Warn if there is trash after the param value
 997                                 for(iter++; iter != list.end(); ++iter)
 998                                         if(dynamic_cast<xmlpp::Element*>(*iter))
 999                                                 warning((*iter),strprintf(_("Unexpected element <%s> after <waypoint> data, ignoring..."),(*iter)->get_name().c_str()));
1000                         }
1001
1002
1003                         try {
1004                                 ValueNode_Animated::WaypointList::iterator waypoint=value_node->new_waypoint(time,waypoint_value_node);
1005
1006                         if(child->get_attribute("tension"))
1007                         {
1008                                 synfig::String str(child->get_attribute("tension")->get_value());
1009                                 waypoint->set_tension(atof(str.c_str()));
1010                         }
1011                         if(child->get_attribute("temporal-tension"))
1012                         {
1013                                 synfig::String str(child->get_attribute("temporal-tension")->get_value());
1014                                 waypoint->set_temporal_tension(atof(str.c_str()));
1015                         }
1016                         if(child->get_attribute("continuity"))
1017                         {
1018                                 synfig::String str(child->get_attribute("continuity")->get_value());
1019                                 waypoint->set_continuity(atof(str.c_str()));
1020                         }
1021                         if(child->get_attribute("bias"))
1022                         {
1023                                 synfig::String str(child->get_attribute("bias")->get_value());
1024                                 waypoint->set_bias(atof(str.c_str()));
1025                         }
1026
1027                         if(child->get_attribute("before"))
1028                         {
1029                                 string val=child->get_attribute("before")->get_value();
1030                                 if(val=="halt")
1031                                         waypoint->set_before(INTERPOLATION_HALT);
1032                                 else if(val=="constant")
1033                                         waypoint->set_before(INTERPOLATION_CONSTANT);
1034                                 else if(val=="linear")
1035                                         waypoint->set_before(INTERPOLATION_LINEAR);
1036                                 else if(val=="manual")
1037                                         waypoint->set_before(INTERPOLATION_MANUAL);
1038                                 else if(val=="auto")
1039                                         waypoint->set_before(INTERPOLATION_TCB);
1040                                 else
1041                                         error(child,strprintf(_("\"%s\" not a valid value for attribute \"%s\" in <%s>"),val.c_str(),"before","waypoint"));
1042                         }
1043
1044                         if(child->get_attribute("after"))
1045                         {
1046                                 string val=child->get_attribute("after")->get_value();
1047                                 if(val=="halt")
1048                                         waypoint->set_after(INTERPOLATION_HALT);
1049                                 else if(val=="constant")
1050                                         waypoint->set_after(INTERPOLATION_CONSTANT);
1051                                 else if(val=="linear")
1052                                         waypoint->set_after(INTERPOLATION_LINEAR);
1053                                 else if(val=="manual")
1054                                         waypoint->set_after(INTERPOLATION_MANUAL);
1055                                 else if(val=="auto")
1056                                         waypoint->set_after(INTERPOLATION_TCB);
1057                                 else
1058                                         error(child,strprintf(_("\"%s\" not a valid value for attribute \"%s\" in <%s>"),val.c_str(),"before","waypoint"));
1059                         }
1060                         }
1061                         catch(Exception::BadTime x)
1062                         {
1063                                 warning(child,x.what());
1064                         }
1065                         continue;
1066
1067                 }
1068                 else
1069                         error_unexpected_element(child,child->get_name());
1070         }
1071
1072         // in canvas version 0.1, angles used to wrap, so to get from -179
1073         // degrees to 180 degrees meant a 1 degree change
1074         // in canvas version 0.2 they don't, so that's a 359 degree change
1075
1076         // when loading a version 0.1 canvas, modify constant angle
1077         // waypoints to that they are within 180 degrees of the previous
1078         // waypoint's value
1079         if (type == ValueBase::TYPE_ANGLE)
1080         {
1081                 if (canvas->get_version() == "0.1")
1082                 {
1083                         bool first = true;
1084                         Real angle, prev = 0;
1085                         WaypointList &wl = value_node->waypoint_list();
1086                         for (WaypointList::iterator iter = wl.begin(); iter != wl.end(); iter++)
1087                         {
1088                                 angle = Angle::deg(iter->get_value(iter->get_time()).get(Angle())).get();
1089                                 if (first)
1090                                         first = false;
1091                                 else if (iter->get_value_node()->get_name() == "constant")
1092                                 {
1093                                         if (angle - prev > 180)
1094                                         {
1095                                                 while (angle - prev > 180) angle -= 360;
1096                                                 iter->set_value(Angle::deg(angle));
1097                                         }
1098                                         else if (prev - angle > 180)
1099                                         {
1100                                                 while (prev - angle > 180) angle += 360;
1101                                                 iter->set_value(Angle::deg(angle));
1102                                         }
1103                                 }
1104                                 prev = angle;
1105                         }
1106                 }
1107         }
1108
1109         value_node->changed();
1110         return value_node;
1111 }
1112
1113 etl::handle<LinkableValueNode>
1114 CanvasParser::parse_linkable_value_node(xmlpp::Element *element,Canvas::Handle canvas)
1115 {
1116         // Determine the type
1117         if(!element->get_attribute("type"))
1118         {
1119                 error(element, strprintf(_("Missing attribute \"type\" in <%s>"), element->get_name().c_str()));
1120                 return 0;
1121         }
1122
1123         ValueBase::Type type=ValueBase::ident_type(element->get_attribute("type")->get_value());
1124
1125         if(!type)
1126         {
1127                 error(element, strprintf(_("Bad type in <%s>"), element->get_name().c_str()));
1128                 return 0;
1129         }
1130
1131         handle<LinkableValueNode> value_node=LinkableValueNode::create(element->get_name(),type);
1132         handle<ValueNode> c[value_node->link_count()];
1133
1134         if(!value_node)
1135         {
1136                 error(element, strprintf(_("Error creating ValueNode <%s> with type '%s'.  Refer to '%s'"),
1137                                                                  element->get_name().c_str(),
1138                                                                  ValueBase::type_local_name(type).c_str(),
1139                                                                  VALUENODE_COMPATIBILITY_URL));
1140                 return 0;
1141         }
1142
1143         if(value_node->get_type()!=type)
1144         {
1145                 error(element, strprintf(_("<%s> did not accept type '%s'"),
1146                                                                  element->get_name().c_str(),
1147                                                                  ValueBase::type_local_name(type).c_str()));
1148                 return 0;
1149         }
1150
1151         value_node->set_root_canvas(canvas->get_root());
1152
1153         // handle exported valuenodes
1154         {
1155                 int index;
1156                 String id, name;
1157                 xmlpp::Element::AttributeList attrib_list(element->get_attributes());
1158                 for(xmlpp::Element::AttributeList::iterator iter = attrib_list.begin(); iter != attrib_list.end(); iter++)
1159                 {
1160                         name = (*iter)->get_name();
1161                         id = (*iter)->get_value();
1162
1163                         if (name == "guid" || name == "id" || name == "type")
1164                                 continue;
1165
1166                         try {
1167                                 index = value_node->get_link_index_from_name(name);
1168
1169                                 if(c[index])
1170                                 {
1171                                         error(element,strprintf(_("'%s' was already defined in <%s>"),
1172                                                                                         name.c_str(),
1173                                                                                         element->get_name().c_str()));
1174                                         continue;
1175                                 }
1176
1177                                 c[index] = canvas->surefind_value_node(id);
1178
1179                                 if (!c[index])
1180                                 {
1181                                         error(element, strprintf(_("'%s' attribute in <%s> references unknown ID '%s'"),
1182                                                                                          name.c_str(),
1183                                                                                          element->get_name().c_str(),
1184                                                                                          id.c_str()));
1185                                         continue;
1186                                 }
1187
1188                                 if(!value_node->set_link(index, c[index]))
1189                                 {
1190                                         error(element, strprintf(_("Unable to set link '\"%s\" to ValueNode \"%s\" (link #%d in \"%s\")"),
1191                                                                                          value_node->link_name(index).c_str(),
1192                                                                                          id.c_str(),
1193                                                                                          index,
1194                                                                                          element->get_name().c_str()));
1195                                         continue;
1196                                 }
1197
1198                                 // printf("  <%s> set link %d (%s) using exported value\n", element->get_name().c_str(), index, name.c_str());
1199                         }
1200                         catch (Exception::BadLinkName)
1201                         {
1202                                 warning(element, strprintf("Bad link name '%s'", name.c_str()));
1203                         }
1204                         catch(Exception::IDNotFound)
1205                         {
1206                                 error(element,"Unable to resolve " + id);
1207                         }
1208                         catch(Exception::FileNotFound)
1209                         {
1210                                 error(element,"Unable to open file referenced in " + id);
1211                         }
1212                         catch(...)
1213                         {
1214                                 error(element,strprintf(_("Unknown Exception thrown when referencing ValueNode \"%s\""), id.c_str()));
1215                                 throw;
1216                         }
1217                 }
1218         }
1219
1220         // handle inline valuenodes
1221         {
1222                 int index;
1223                 String child_name;
1224                 xmlpp::Element::NodeList list = element->get_children();
1225                 for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1226                 {
1227                         xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1228                         try
1229                         {
1230                                 if(!child)
1231                                         continue;
1232
1233                                 child_name = child->get_name();
1234
1235                                 index = value_node->get_link_index_from_name(child_name);
1236
1237                                 if(c[index])
1238                                 {
1239                                         error(child, strprintf(_("'%s' was already defined in <%s>"),
1240                                                                                    child_name.c_str(),
1241                                                                                    element->get_name().c_str()));
1242                                         break;
1243                                 }
1244
1245                                 xmlpp::Element::NodeList list = child->get_children();
1246                                 xmlpp::Element::NodeList::iterator iter;
1247
1248                                 // Search for the first non-text XML element
1249                                 for(iter = list.begin(); iter != list.end(); ++iter)
1250                                         if(dynamic_cast<xmlpp::Element*>(*iter)) break;
1251
1252                                 if(iter==list.end())
1253                                 {
1254                                         error(child,strprintf(_("element <%s> is missing its contents"),
1255                                                                                   child_name.c_str()));
1256                                         continue;
1257                                 }
1258
1259                                 c[index]=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1260
1261                                 if(!c[index])
1262                                 {
1263                                         error((*iter),strprintf(_("Parse of '%s' failed"),
1264                                                                                         child_name.c_str()));
1265                                         continue;
1266                                 }
1267
1268                                 if(!value_node->set_link(index,c[index]))
1269                                 {
1270                                         error(child,strprintf(_("Unable to connect value node ('%s' of type '%s') to link %d (%s)"),
1271                                                                                   c[index]->get_name().c_str(),
1272                                                                                   ValueBase::type_local_name(c[index]->get_type()).c_str(),
1273                                                                                   index,
1274                                                                                   value_node->link_name(index).c_str()));
1275                                         continue;
1276                                 }
1277
1278                                 // \todo do a search for more elements and warn if they are found
1279
1280                                 // printf("  <%s> set link %d (%s) using inline value\n", element->get_name().c_str(), index, child_name.c_str());
1281                         }
1282                         catch(Exception::BadLinkName)
1283                         {
1284                                 warning(child, strprintf("Bad link name for <%s>", element->get_name().c_str()));
1285                         }
1286                         catch(...)
1287                         {
1288                                 error(child, strprintf(_("Unknown Exception thrown when working on element \"%s\""),child_name.c_str()));
1289                                 throw;
1290                         }
1291                 }
1292         }
1293
1294         String version(canvas->get_version());
1295         for (int i = 0; i < value_node->link_count(); i++)
1296         {
1297                 if (!c[i])
1298                 {
1299                         // the 'width' parameter of <stripes> wasn't always present in version 0.1 canvases
1300                         if (version == "0.1" && element->get_name() == "stripes" && value_node->link_name(i) == "width")
1301                                 continue;
1302
1303                         // these 3 blinecalctangent parameters didn't appear until canvas version 0.5
1304                         if ((version == "0.1" || version == "0.2" || version == "0.3" || version == "0.4") &&
1305                                 element->get_name() == "blinecalctangent" &&
1306                                 (value_node->link_name(i) == "offset" ||
1307                                  value_node->link_name(i) == "scale" ||
1308                                  value_node->link_name(i) == "fixed_length"))
1309                                 continue;
1310
1311                         // 'scale' was added while canvas version 0.5 was in use
1312                         if ((version == "0.3" || version == "0.4" || version == "0.5") &&
1313                                 element->get_name() == "blinecalcwidth" &&
1314                                 value_node->link_name(i) == "scale")
1315                                 continue;
1316
1317                         // 'loop' was added while canvas version 0.5 was in use, as was the 'gradientcolor' node type
1318                         if (version == "0.5" &&
1319                                 element->get_name() == "gradientcolor" &&
1320                                 value_node->link_name(i) == "loop")
1321                                 continue;
1322
1323                         // 'loop' was added while canvas version 0.6 was in use; the 'random' node was added back when 0.1 was in use
1324                         if ((version == "0.1" || version == "0.2" || version == "0.3" || version == "0.4" || version == "0.5" || version == "0.6") &&
1325                                 element->get_name() == "random" &&
1326                                 value_node->link_name(i) == "loop")
1327                                 continue;
1328
1329                         error(element, strprintf(_("<%s> is missing link %d (%s)"),
1330                                                                          element->get_name().c_str(),
1331                                                                          i,
1332                                                                          value_node->link_name(i).c_str()));
1333                         return 0;
1334                 }
1335         }
1336
1337         // pre 0.4 canvases had *calctangent outputs scaled down by 0.5 for some reason
1338         if (element->get_name() == "blinecalctangent" || element->get_name() == "segcalctangent")
1339         {
1340                 if (version == "0.1" || version == "0.2" || version == "0.3")
1341                 {
1342                         handle<LinkableValueNode> scale_value_node=LinkableValueNode::create("scale",type);
1343                         scale_value_node->set_link(scale_value_node->get_link_index_from_name("link"), value_node);
1344                         scale_value_node->set_link(scale_value_node->get_link_index_from_name("scalar"), ValueNode_Const::create(Real(0.5)));
1345                         value_node = scale_value_node;
1346                 }
1347         }
1348
1349         return value_node;
1350 }
1351
1352 // This will also parse a bline
1353 handle<ValueNode_DynamicList>
1354 CanvasParser::parse_dynamic_list(xmlpp::Element *element,Canvas::Handle canvas)
1355 {
1356         assert(element->get_name()=="dynamic_list" || element->get_name()=="bline");
1357
1358         const float fps(canvas?canvas->rend_desc().get_frame_rate():0);
1359
1360         if(!element->get_attribute("type"))
1361         {
1362                 error(element,"Missing attribute \"type\" in <dynamic_list>");
1363                 return handle<ValueNode_DynamicList>();
1364         }
1365
1366         ValueBase::Type type=ValueBase::ident_type(element->get_attribute("type")->get_value());
1367
1368         if(!type)
1369         {
1370                 error(element,"Bad type in <dynamic_list>");
1371                 return handle<ValueNode_DynamicList>();
1372         }
1373
1374         handle<ValueNode_DynamicList> value_node;
1375         handle<ValueNode_BLine> bline_value_node;
1376
1377         if(element->get_name()=="bline")
1378         {
1379                 value_node=bline_value_node=ValueNode_BLine::create();
1380                 if(element->get_attribute("loop"))
1381                 {
1382                         String loop=element->get_attribute("loop")->get_value();
1383                         if(loop=="true" || loop=="1" || loop=="TRUE" || loop=="True")
1384                                 bline_value_node->set_loop(true);
1385                         else
1386                                 bline_value_node->set_loop(false);
1387                 }
1388
1389         }
1390         else
1391                 value_node=ValueNode_DynamicList::create(type);
1392
1393         if(!value_node)
1394         {
1395                 error(element,strprintf(_("Unable to create <dynamic_list>")));
1396                 return handle<ValueNode_DynamicList>();
1397         }
1398
1399         value_node->set_root_canvas(canvas->get_root());
1400
1401         xmlpp::Element::NodeList list = element->get_children();
1402         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1403         {
1404                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1405                 if(!child)
1406                         continue;
1407                 else
1408                 if(child->get_name()=="entry")
1409                 {
1410                         ValueNode_DynamicList::ListEntry list_entry;
1411
1412                         // Parse begin/end waypoints
1413                         {
1414                                 typedef synfig::ValueNode_DynamicList::ListEntry::Activepoint Activepoint;
1415                                 typedef synfig::ValueNode_DynamicList::ListEntry::ActivepointList ActivepointList;
1416
1417                                 String begin_sequence;
1418                                 String end_sequence;
1419
1420                                 ActivepointList &timing_info(list_entry.timing_info);
1421
1422                                 if(child->get_attribute("begin"))
1423                                         begin_sequence=child->get_attribute("begin")->get_value();
1424
1425                                 if(child->get_attribute("on"))
1426                                         begin_sequence=child->get_attribute("on")->get_value();
1427
1428                                 if(child->get_attribute("end"))
1429                                         end_sequence=child->get_attribute("end")->get_value();
1430
1431                                 if(child->get_attribute("off"))
1432                                         end_sequence=child->get_attribute("off")->get_value();
1433
1434                                 // clear out any auto-start
1435                                 if(!begin_sequence.empty())
1436                                         timing_info.clear();
1437
1438                                 //! \optimize
1439                                 while(!begin_sequence.empty())
1440                                 {
1441                                         String::iterator iter(find(begin_sequence.begin(),begin_sequence.end(),','));
1442                                         String timecode(begin_sequence.begin(), iter);
1443                                         int priority=0;
1444
1445                                         // skip whitespace before checking for a priority
1446                                         while (isspace(timecode[0]))
1447                                                 timecode=timecode.substr(1);
1448
1449                                         // If there is a priority, then grab it and remove
1450                                         // it from the timecode
1451                                         if(timecode[0]=='p')
1452                                         {
1453                                                 //priority=timecode[1]-'0';
1454                                                 //timecode=String(timecode.begin()+3,timecode.end());
1455                                                 int space=timecode.find_first_of(' ');
1456                                                 priority=atoi(String(timecode,1,space-1).c_str());
1457                                                 timecode=String(timecode.begin()+space+1,timecode.end());
1458                                                 //synfig::info("priority: %d      timecode: %s",priority,timecode.c_str());
1459                                         }
1460
1461                                         timing_info.push_back(
1462                                                 Activepoint(
1463                                                         Time(
1464                                                                 timecode,
1465                                                                 fps
1466                                                         ),
1467                                                         true,   // Mark as a "on" activepoint
1468                                                         priority
1469                                                 )
1470                                         );
1471
1472                                         if(iter==begin_sequence.end())
1473                                                 begin_sequence.clear();
1474                                         else
1475                                                 begin_sequence=String(iter+1,begin_sequence.end());
1476                                 }
1477
1478                                 //! \optimize
1479                                 while(!end_sequence.empty())
1480                                 {
1481                                         String::iterator iter(find(end_sequence.begin(),end_sequence.end(),','));
1482                                         String timecode(end_sequence.begin(),   iter);
1483                                         int priority=0;
1484
1485                                         // skip whitespace before checking for a priority
1486                                         while (isspace(timecode[0]))
1487                                                 timecode=timecode.substr(1);
1488
1489                                         // If there is a priority, then grab it and remove
1490                                         // it from the timecode
1491                                         if(timecode[0]=='p')
1492                                         {
1493                                                 //priority=timecode[1]-'0';
1494                                                 //timecode=String(timecode.begin()+3,timecode.end());
1495                                                 int space=timecode.find_first_of(' ');
1496                                                 priority=atoi(String(timecode,1,space-1).c_str());
1497                                                 timecode=String(timecode.begin()+space+1,timecode.end());
1498                                                 //synfig::info("priority: %d      timecode: %s",priority,timecode.c_str());
1499                                         }
1500
1501                                         timing_info.push_back(
1502                                                 Activepoint(
1503                                                         Time(
1504                                                                 timecode,
1505                                                                 fps
1506                                                         ),
1507                                                         false,  // Mark as a "off" activepoint
1508                                                         priority
1509                                                 )
1510                                         );
1511                                         if(iter==end_sequence.end())
1512                                                 end_sequence.clear();
1513                                         else
1514                                                 end_sequence=String(iter+1,end_sequence.end());
1515                                 }
1516
1517                                 timing_info.sort();
1518                         }
1519
1520                         if(child->get_attribute("use"))
1521                         {
1522                                 // \todo does this need to be able to read 'use="canvas"', like waypoints can now?  (see 'surefind_canvas' in this file)
1523                                 string id=child->get_attribute("use")->get_value();
1524                                 try
1525                                 {
1526                                         list_entry.value_node=canvas->surefind_value_node(id);
1527                                 }
1528                                 catch(Exception::IDNotFound)
1529                                 {
1530                                         error(child,"\"use\" attribute in <entry> references unknown ID -- "+id);
1531                                         continue;
1532                                 }
1533                         }
1534                         else
1535                         {
1536                                 xmlpp::Element::NodeList list = child->get_children();
1537                                 xmlpp::Element::NodeList::iterator iter;
1538
1539                                 // Search for the first non-text XML element
1540                                 for(iter = list.begin(); iter != list.end(); ++iter)
1541                                         if(dynamic_cast<xmlpp::Element*>(*iter)) break;
1542
1543                                 if(iter==list.end())
1544                                 {
1545                                         error(child,strprintf(_("<entry> is missing its contents or missing \"use\" element")));
1546                                         continue;
1547                                 }
1548
1549                                 list_entry.value_node=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1550
1551                                 if(!list_entry.value_node)
1552                                         error((*iter),"Parse of ValueNode failed");
1553
1554                                 // \todo do a search for more elements and warn if they are found
1555
1556                         }
1557
1558                         value_node->add(list_entry);
1559                         value_node->set_link(value_node->link_count()-1,list_entry.value_node);
1560                 }
1561                 else
1562                         error_unexpected_element(child,child->get_name());
1563         }
1564         return value_node;
1565 }
1566
1567 handle<ValueNode>
1568 CanvasParser::parse_value_node(xmlpp::Element *element,Canvas::Handle canvas)
1569 {
1570         handle<ValueNode> value_node;
1571         assert(element);
1572
1573         GUID guid;
1574
1575         if(element->get_attribute("guid"))
1576         {
1577                 guid=GUID(element->get_attribute("guid")->get_value())^canvas->get_root()->get_guid();
1578                 value_node=guid_cast<ValueNode>(guid);
1579                 if(value_node)
1580                         return value_node;
1581         }
1582
1583         // If ValueBase::ident_type() recognizes the name, then we know it's a ValueBase
1584         if(element->get_name()!="canvas" && ValueBase::ident_type(element->get_name()))
1585         {
1586                 ValueBase data=parse_value(element,canvas);
1587
1588                 if(!data.is_valid())
1589                 {
1590                         error(element,strprintf(_("Bad data in <%s>"),element->get_name().c_str()));
1591                         return value_node;
1592                 }
1593
1594                 // We want to convert this ValueBase into a
1595                 // ValueNode_Const. That way, we can treat the
1596                 // ID like any other Datanode. Think of this
1597                 // as a shorthand for creating constant ValueNodes.
1598
1599                 value_node=ValueNode_Const::create(data);
1600         }
1601         else
1602         if(element->get_name()=="hermite" || element->get_name()=="animated")
1603                 value_node=parse_animated(element,canvas);
1604         else
1605         if(element->get_name()=="dynamic_list")
1606                 value_node=parse_dynamic_list(element,canvas);
1607         else
1608         if(element->get_name()=="bline") // This is not a typo. The dynamic list parser will parse a bline.
1609                 value_node=parse_dynamic_list(element,canvas);
1610         else
1611         if(LinkableValueNode::book().count(element->get_name()))
1612         {
1613                 value_node=parse_linkable_value_node(element,canvas);
1614                 if (!value_node) value_node = PlaceholderValueNode::create();
1615         }
1616         else
1617         if(element->get_name()=="canvas")
1618                 value_node=ValueNode_Const::create(parse_canvas(element,canvas,true));
1619         else
1620         {
1621                 error_unexpected_element(element,element->get_name());
1622                 error(element, strprintf(_("Expected a ValueNode.  Refer to '%s'"),
1623                                                                  VALUENODE_COMPATIBILITY_URL));
1624                 value_node=PlaceholderValueNode::create();
1625         }
1626
1627         value_node->set_root_canvas(canvas->get_root());
1628
1629         // If we were successful, and our element has
1630         // an ID attribute, go ahead and add it to the
1631         // value_node list
1632         if(value_node && element->get_attribute("id"))
1633         {
1634                 string id=element->get_attribute("id")->get_value();
1635
1636                 //value_node->set_id(id);
1637
1638                 // If there is already a value_node in the list
1639                 // with the same ID, then that is an error
1640                 try { canvas->add_value_node(value_node,id); }
1641                 catch(Exception::BadLinkName)
1642                 {
1643                         warning(element,strprintf(_("Bad ID \"%s\""),id.c_str()));
1644                         return value_node;
1645                 }
1646                 catch(Exception::IDAlreadyExists)
1647                 {
1648                         error(element,strprintf(_("Duplicate ID \"%s\""),id.c_str()));
1649                         return value_node;
1650                 }
1651                 catch(...)
1652                 {
1653                         error(element,strprintf(_("Unknown Exception thrown when adding ValueNode \"%s\""),id.c_str()));
1654                         throw;
1655                 }
1656         }
1657         value_node->set_guid(guid);
1658         return value_node;
1659 }
1660
1661 void
1662 CanvasParser::parse_canvas_defs(xmlpp::Element *element,Canvas::Handle canvas)
1663 {
1664         assert(element->get_name()=="defs");
1665         xmlpp::Element::NodeList list = element->get_children();
1666         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1667         {
1668                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1669                 if(!child)
1670                         continue;
1671                 else
1672                 if(child->get_name()=="canvas")
1673                         parse_canvas(child, canvas);
1674                 else
1675                         parse_value_node(child,canvas);
1676         }
1677 }
1678
1679 Layer::Handle
1680 CanvasParser::parse_layer(xmlpp::Element *element,Canvas::Handle canvas)
1681 {
1682
1683         assert(element->get_name()=="layer");
1684         Layer::Handle layer;
1685
1686         if(!element->get_attribute("type"))
1687         {
1688                 error(element,_("Missing \"type\" attribute to \"layer\" element"));
1689                 return Layer::Handle();
1690         }
1691
1692         layer=Layer::create(element->get_attribute("type")->get_value());
1693         layer->set_canvas(canvas);
1694
1695         if(element->get_attribute("group"))
1696         {
1697                 layer->add_to_group(
1698                         element->get_attribute("group")->get_value()
1699                 );
1700         }
1701
1702         // Handle the version attribute
1703         if(element->get_attribute("version"))
1704         {
1705                 String version(element->get_attribute("version")->get_value());
1706                 if(version>layer->get_version())
1707                         warning(element,_("Installed layer version is smaller than layer version in file"));
1708                 if(version!=layer->get_version())
1709                         layer->set_version(version);
1710         }
1711
1712         // Handle the description
1713         if(element->get_attribute("desc"))
1714                 layer->set_description(element->get_attribute("desc")->get_value());
1715
1716         if(element->get_attribute("active"))
1717                 layer->set_active(element->get_attribute("active")->get_value()=="false"?false:true);
1718
1719         xmlpp::Element::NodeList list = element->get_children();
1720         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1721         {
1722                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1723                 if(!child)
1724                         continue;
1725                 else
1726                 if(child->get_name()=="name")
1727                         warning(child,_("<name> entry for <layer> is not yet supported. Ignoring..."));
1728                 else
1729                 if(child->get_name()=="desc")
1730                         warning(child,_("<desc> entry for <layer> is not yet supported. Ignoring..."));
1731                 else
1732                 if(child->get_name()=="param")
1733                 {
1734                         xmlpp::Element::NodeList list = child->get_children();
1735
1736                         if(!child->get_attribute("name"))
1737                         {
1738                                 error(child,_("Missing \"name\" attribute for <param>."));
1739                                 continue;
1740                         }
1741
1742                         String param_name=child->get_attribute("name")->get_value();
1743
1744                         // SVN r2013 and r2014 renamed all 'pos' and 'offset' parameters to 'origin'
1745                         // 'pos' and 'offset' will appear in old .sif files; handle them correctly
1746                         if (param_name == "pos" || param_name == "offset")
1747                                 param_name = "origin";
1748
1749                         if(child->get_attribute("use"))
1750                         {
1751                                 // If the "use" attribute is used, then the
1752                                 // element should be empty. Warn the user if
1753                                 // we find otherwise.
1754                                 if(!list.empty())
1755                                         warning(child,_("Found \"use\" attribute for <param>, but it wasn't empty. Ignoring contents..."));
1756
1757                                 String str=     child->get_attribute("use")->get_value();
1758
1759                                 if (str.empty())
1760                                         error(child,_("Empty use=\"\" value in <param>"));
1761                                 else if(layer->get_param(param_name).get_type()==ValueBase::TYPE_CANVAS)
1762                                 {
1763                                         String warnings;
1764                                         Canvas::Handle c(canvas->surefind_canvas(str, warnings));
1765                                         warnings_text += warnings;
1766                                         if(!c) error((*iter),strprintf(_("Failed to load subcanvas '%s'"), str.c_str()));
1767                                         if(!layer->set_param(param_name,c))
1768                                                 error((*iter),_("Layer rejected canvas link"));
1769                                 }
1770                                 else
1771                                 try
1772                                 {
1773                                         handle<ValueNode> value_node=canvas->surefind_value_node(str);
1774
1775                                         // Assign the value_node to the dynamic parameter list
1776                                         if (param_name == "segment_list" && (layer->get_name() == "region" || layer->get_name() == "outline"))
1777                                         {
1778                                                 synfig::warning("%s: Updated valuenode connection to use the \"bline\" parameter instead of \"segment_list\".",
1779                                                                                 layer->get_name().c_str());
1780                                                 param_name = "bline";
1781                                         }
1782                                         layer->connect_dynamic_param(param_name,value_node);
1783                         }
1784                                 catch(Exception::IDNotFound)
1785                                 {
1786                                         error(child,strprintf(_("Unknown ID (%s) referenced in <param>"),str.c_str()));
1787                                 }
1788
1789                                 continue;
1790                         }
1791
1792                         xmlpp::Element::NodeList::iterator iter;
1793
1794                         // Search for the first non-text XML element
1795                         for(iter = list.begin(); iter != list.end(); ++iter)
1796                                 if(dynamic_cast<xmlpp::Element*>(*iter))
1797                                         break;
1798                                 //if(!(!dynamic_cast<xmlpp::Element*>(*iter) && (*iter)->get_name()=="text"||(*iter)->get_name()=="comment"   )) break;
1799
1800                         if(iter==list.end())
1801                         {
1802                                 error(child,_("<param> is either missing its contents, or missing a \"use\" attribute."));
1803                                 continue;
1804                         }
1805
1806                         // If we recognize the element name as a
1807                         // ValueBase, then treat is at one
1808                         if(/*(*iter)->get_name()!="canvas" && */ValueBase::ident_type((*iter)->get_name()) && !dynamic_cast<xmlpp::Element*>(*iter)->get_attribute("guid"))
1809                         {
1810                                 ValueBase data=parse_value(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1811
1812                                 if(!data.is_valid())
1813                                 {
1814                                         error((*iter),_("Bad data for <param>"));
1815                                         continue;
1816                                 }
1817
1818                                 // Set the layer's parameter, and make sure that
1819                                 // the layer liked it
1820                                 if(!layer->set_param(param_name,data))
1821                                 {
1822                                         warning((*iter),strprintf(_("Layer '%s' rejected value for parameter '%s'"),
1823                                                                                           element->get_attribute("type")->get_value().c_str(),
1824                                                                                           param_name.c_str()));
1825                                         continue;
1826                                 }
1827                         }
1828                         else    // ... otherwise, we assume that it is a ValueNode
1829                         {
1830                                 handle<ValueNode> value_node=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1831
1832                                 if(!value_node)
1833                                 {
1834                                         error((*iter),_("Bad data for <param>"));
1835                                         continue;
1836                                 }
1837
1838                                 // Assign the value_node to the dynamic parameter list
1839                                 layer->connect_dynamic_param(param_name,value_node);
1840                         }
1841
1842                         // Warn if there is trash after the param value
1843                         for(iter++; iter != list.end(); ++iter)
1844                                 if(dynamic_cast<xmlpp::Element*>(*iter))
1845                                         warning((*iter),strprintf(_("Unexpected element <%s> after <param> data, ignoring..."),(*iter)->get_name().c_str()));
1846                         continue;
1847                 }
1848                 else
1849                         error_unexpected_element(child,child->get_name());
1850         }
1851
1852         layer->reset_version();
1853         return layer;
1854 }
1855
1856 Canvas::Handle
1857 CanvasParser::parse_canvas(xmlpp::Element *element,Canvas::Handle parent,bool inline_, String filename)
1858 {
1859
1860         if(element->get_name()!="canvas")
1861         {
1862                 error_unexpected_element(element,element->get_name(),"canvas");
1863                 return Canvas::Handle();
1864         }
1865         Canvas::Handle canvas;
1866
1867
1868
1869         if(parent && (element->get_attribute("id") || inline_))
1870         {
1871                 if(inline_)
1872                 {
1873                         canvas=Canvas::create_inline(parent);
1874                 }
1875                 else
1876                 {
1877                         try
1878                         {
1879                                 String warnings;
1880                                 canvas=parent->find_canvas(element->get_attribute("id")->get_value(), warnings);
1881                                 warnings_text += warnings;
1882                         }
1883                         catch(...)
1884                         {
1885                                 canvas=parent->new_child_canvas(element->get_attribute("id")->get_value());
1886                         }
1887                 }
1888                 canvas->rend_desc().clear_flags();
1889         }
1890         else
1891         {
1892                 canvas=Canvas::create();
1893                 if(filename=="/dev/stdin")
1894                         canvas->set_file_name("./stdin.sif");
1895                 else
1896                         canvas->set_file_name(filename);
1897                 canvas->rend_desc().clear_flags();
1898         }
1899
1900         if(element->get_attribute("guid"))
1901         {
1902                 GUID guid(element->get_attribute("guid")->get_value());
1903                 if(guid_cast<Canvas>(guid))
1904                         return guid_cast<Canvas>(guid);
1905                 else
1906                         canvas->set_guid(guid);
1907         }
1908
1909         if(element->get_attribute("version"))
1910                 canvas->set_version(element->get_attribute("version")->get_value());
1911         else if(parent)
1912                 canvas->set_version(parent->get_version());
1913
1914         if(element->get_attribute("width"))
1915         {
1916                 int width = atoi(element->get_attribute("width")->get_value().c_str());
1917                 if (width < 1)
1918                         fatal_error(element, _("Canvas with width or height less than one is not allowed"));
1919                 canvas->rend_desc().set_w(width);
1920         }
1921
1922         if(element->get_attribute("height"))
1923         {
1924                 int height = atoi(element->get_attribute("height")->get_value().c_str());
1925                 if (height < 1)
1926                         fatal_error(element, _("Canvas with width or height less than one is not allowed"));
1927                 canvas->rend_desc().set_h(height);
1928         }
1929
1930         if(element->get_attribute("xres"))
1931                 canvas->rend_desc().set_x_res(atof(element->get_attribute("xres")->get_value().c_str()));
1932
1933         if(element->get_attribute("yres"))
1934                 canvas->rend_desc().set_y_res(atof(element->get_attribute("yres")->get_value().c_str()));
1935
1936
1937         if(element->get_attribute("fps"))
1938                 canvas->rend_desc().set_frame_rate(atof(element->get_attribute("fps")->get_value().c_str()));
1939
1940         if(element->get_attribute("start-time"))
1941                 canvas->rend_desc().set_time_start(Time(element->get_attribute("start-time")->get_value(),canvas->rend_desc().get_frame_rate()));
1942
1943         if(element->get_attribute("begin-time"))
1944                 canvas->rend_desc().set_time_start(Time(element->get_attribute("begin-time")->get_value(),canvas->rend_desc().get_frame_rate()));
1945
1946         if(element->get_attribute("end-time"))
1947                 canvas->rend_desc().set_time_end(Time(element->get_attribute("end-time")->get_value(),canvas->rend_desc().get_frame_rate()));
1948
1949         if(element->get_attribute("antialias"))
1950                 canvas->rend_desc().set_antialias(atoi(element->get_attribute("antialias")->get_value().c_str()));
1951
1952         if(element->get_attribute("view-box"))
1953         {
1954                 string values=element->get_attribute("view-box")->get_value();
1955                 Vector
1956                         tl,
1957                         br;
1958                 tl[0]=atof(string(values.data(),values.find(' ')).c_str());
1959                 values=string(values.begin()+values.find(' ')+1,values.end());
1960                 tl[1]=atof(string(values.data(),values.find(' ')).c_str());
1961                 values=string(values.begin()+values.find(' ')+1,values.end());
1962                 br[0]=atof(string(values.data(),values.find(' ')).c_str());
1963                 values=string(values.begin()+values.find(' ')+1,values.end());
1964                 br[1]=atof(values.c_str());
1965
1966                 canvas->rend_desc().set_tl(tl);
1967                 canvas->rend_desc().set_br(br);
1968         }
1969
1970         if(element->get_attribute("bgcolor"))
1971         {
1972                 string values=element->get_attribute("bgcolor")->get_value();
1973                 Color bg;
1974
1975                 bg.set_r(atof(string(values.data(),values.find(' ')).c_str()));
1976                 values=string(values.begin()+values.find(' ')+1,values.end());
1977
1978                 bg.set_g(atof(string(values.data(),values.find(' ')).c_str()));
1979                 values=string(values.begin()+values.find(' ')+1,values.end());
1980
1981                 bg.set_b(atof(string(values.data(),values.find(' ')).c_str()));
1982                 values=string(values.begin()+values.find(' ')+1,values.end());
1983
1984                 bg.set_a(atof(values.c_str()));
1985
1986                 canvas->rend_desc().set_bg_color(bg);
1987         }
1988
1989         if(element->get_attribute("focus"))
1990         {
1991                 string values=element->get_attribute("focus")->get_value();
1992                 Vector focus;
1993
1994                 focus[0]=atof(string(values.data(),values.find(' ')).c_str());
1995                 values=string(values.begin()+values.find(' ')+1,values.end());
1996                 focus[1]=atof(values.c_str());
1997
1998                 canvas->rend_desc().set_focus(focus);
1999         }
2000
2001         canvas->rend_desc().set_flags(RendDesc::PX_ASPECT|RendDesc::IM_SPAN);
2002
2003         xmlpp::Element::NodeList list = element->get_children();
2004         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
2005         {
2006                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
2007                 if(child)
2008                 {
2009                         if(child->get_name()=="defs")
2010                         {
2011                                 if(canvas->is_inline())
2012                                         error(child,_("Inline canvas cannot have a <defs> section"));
2013                                 parse_canvas_defs(child, canvas);
2014                         }
2015                         else
2016                         if(child->get_name()=="keyframe")
2017                         {
2018                                 if(canvas->is_inline())
2019                                 {
2020                                         warning(child,_("Inline canvas cannot have keyframes"));
2021                                         continue;
2022                                 }
2023
2024                                 canvas->keyframe_list().add(parse_keyframe(child,canvas));
2025                                 canvas->keyframe_list().sync();
2026                         }
2027                         else
2028                         if(child->get_name()=="meta")
2029                         {
2030                                 if(canvas->is_inline())
2031                                 {
2032                                         warning(child,_("Inline canvases cannot have metadata"));
2033                                         continue;
2034                                 }
2035
2036                                 String name,content;
2037
2038                                 if(!child->get_attribute("name"))
2039                                 {
2040                                         warning(child,_("<meta> must have a name"));
2041                                         continue;
2042                                 }
2043
2044                                 if(!child->get_attribute("content"))
2045                                 {
2046                                         warning(child,_("<meta> must have content"));
2047                                         continue;
2048                                 }
2049
2050                                 canvas->set_meta_data(child->get_attribute("name")->get_value(),child->get_attribute("content")->get_value());
2051                         }
2052                         else if(child->get_name()=="name")
2053                         {
2054                                 xmlpp::Element::NodeList list = child->get_children();
2055
2056                                 // If we don't have any name, warn
2057                                 if(list.empty())
2058                                         warning(child,_("blank \"name\" entity"));
2059
2060                                 string tmp;
2061                                 for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
2062                                         if(dynamic_cast<xmlpp::TextNode*>(*iter))tmp+=dynamic_cast<xmlpp::TextNode*>(*iter)->get_content();
2063                                 canvas->set_name(tmp);
2064                         }
2065                         else
2066                         if(child->get_name()=="desc")
2067                         {
2068
2069                                 xmlpp::Element::NodeList list = child->get_children();
2070
2071                                 // If we don't have any description, warn
2072                                 if(list.empty())
2073                                         warning(child,_("blank \"desc\" entity"));
2074
2075                                 string tmp;
2076                                 for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
2077                                         if(dynamic_cast<xmlpp::TextNode*>(*iter))tmp+=dynamic_cast<xmlpp::TextNode*>(*iter)->get_content();
2078                                 canvas->set_description(tmp);
2079                         }
2080                         else
2081                         if(child->get_name()=="author")
2082                         {
2083
2084                                 xmlpp::Element::NodeList list = child->get_children();
2085
2086                                 // If we don't have any description, warn
2087                                 if(list.empty())
2088                                         warning(child,_("blank \"author\" entity"));
2089
2090                                 string tmp;
2091                                 for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
2092                                         if(dynamic_cast<xmlpp::TextNode*>(*iter))tmp+=dynamic_cast<xmlpp::TextNode*>(*iter)->get_content();
2093                                 canvas->set_author(tmp);
2094                         }
2095                         else
2096                         if(child->get_name()=="layer")
2097                         {
2098                                 //if(canvas->is_inline())
2099                                 //      canvas->push_front(parse_layer(child,canvas->parent()));
2100                                 //else
2101                                         canvas->push_front(parse_layer(child,canvas));
2102                         }
2103                         else
2104                                 error_unexpected_element(child,child->get_name());
2105                 }
2106 //              else
2107 //              if((child->get_name()=="text"||child->get_name()=="comment") && child->has_child_text())
2108 //                      continue;
2109         }
2110
2111         if(canvas->value_node_list().placeholder_count())
2112         {
2113                 String nodes;
2114                 for (ValueNodeList::const_iterator iter = canvas->value_node_list().begin(); iter != canvas->value_node_list().end(); iter++)
2115                         if(PlaceholderValueNode::Handle::cast_dynamic(*iter))
2116                         {
2117                                 if (nodes != "") nodes += ", ";
2118                                 nodes += "'" + (*iter)->get_id() + "'";
2119                         }
2120                 error(element,strprintf(_("Canvas '%s' has undefined %s: %s"),
2121                                                                 canvas->get_id().c_str(),
2122                                                                 canvas->value_node_list().placeholder_count() == 1 ? _("ValueNode") : _("ValueNodes"),
2123                                                                 nodes.c_str()));
2124         }
2125
2126         canvas->set_version(CURRENT_CANVAS_VERSION);
2127         return canvas;
2128 }
2129
2130 void
2131 CanvasParser::register_canvas_in_map(Canvas::Handle canvas, String as)
2132 {
2133         get_open_canvas_map()[etl::absolute_path(as)]=canvas;
2134         canvas->signal_deleted().connect(sigc::bind(sigc::ptr_fun(_remove_from_open_canvas_map),canvas.get()));
2135         canvas->signal_file_name_changed().connect(sigc::bind(sigc::ptr_fun(_canvas_file_name_changed),canvas.get()));
2136 }
2137
2138 #ifdef _DEBUG
2139 void
2140 CanvasParser::show_canvas_map(String file, int line, String text)
2141 {
2142         return;
2143         printf("  .-----\n  |  %s:%d %s\n", file.c_str(), line, text.c_str());
2144         std::map<synfig::String, etl::loose_handle<Canvas> > canvas_map(synfig::get_open_canvas_map());
2145         std::map<synfig::String, etl::loose_handle<Canvas> >::iterator iter;
2146         for (iter = canvas_map.begin(); iter != canvas_map.end(); iter++)
2147         {
2148                 synfig::String first(iter->first);
2149                 etl::loose_handle<Canvas> second(iter->second);
2150                 printf("  |    %40s : %lx (%d)\n", first.c_str(), ulong(&*second), second->count());
2151         }
2152         printf("  `-----\n\n");
2153 }
2154 #endif  // _DEBUG
2155
2156 Canvas::Handle
2157 CanvasParser::parse_from_file_as(const String &file_,const String &as_,String &errors)
2158 {
2159         ChangeLocale change_locale(LC_NUMERIC, "C");
2160         String file(unix_to_local_path(file_));
2161         String as(unix_to_local_path(as_));
2162
2163         try
2164         {
2165                 if(get_open_canvas_map().count(etl::absolute_path(as)))
2166                         return get_open_canvas_map()[etl::absolute_path(as)];
2167
2168                 filename=as;
2169                 total_warnings_=0;
2170                 xmlpp::DomParser parser(file);
2171                 if(parser)
2172                 {
2173                         Canvas::Handle canvas(parse_canvas(parser.get_document()->get_root_node(),0,false,as));
2174                         if (!canvas) return canvas;
2175                         register_canvas_in_map(canvas, as);
2176
2177                         const ValueNodeList& value_node_list(canvas->value_node_list());
2178
2179                         again:
2180                         ValueNodeList::const_iterator iter;
2181                         for(iter=value_node_list.begin();iter!=value_node_list.end();++iter)
2182                         {
2183                                 ValueNode::Handle value_node(*iter);
2184                                 if(value_node->is_exported() && value_node->get_id().find("Unnamed")==0)
2185                                 {
2186                                         canvas->remove_value_node(value_node);
2187                                         goto again;
2188                                 }
2189                         }
2190
2191                         return canvas;
2192                 }
2193         }
2194         catch(Exception::BadLinkName) { synfig::error("BadLinkName Thrown"); }
2195         catch(Exception::BadType) { synfig::error("BadType Thrown"); }
2196         catch(Exception::FileNotFound) { synfig::error("FileNotFound Thrown"); }
2197         catch(Exception::IDNotFound) { synfig::error("IDNotFound Thrown"); }
2198         catch(Exception::IDAlreadyExists) { synfig::error("IDAlreadyExists Thrown"); }
2199         catch(xmlpp::internal_error x)
2200         {
2201                 if (!strcmp(x.what(), "Couldn't create parsing context"))
2202                         throw runtime_error(String("  * ") + _("Can't open file") + " \"" + file + "\"");
2203                 throw;
2204         }
2205         catch(const std::exception& ex)
2206         {
2207                 synfig::error("Standard Exception: "+String(ex.what()));
2208                 errors = ex.what();
2209                 return Canvas::Handle();
2210         }
2211         catch(const String& str)
2212         {
2213                 cerr<<str<<endl;
2214                 //      synfig::error(str);
2215                 errors = str;
2216                 return Canvas::Handle();
2217         }
2218         return Canvas::Handle();
2219 }
2220
2221 Canvas::Handle
2222 CanvasParser::parse_as(xmlpp::Element* node,String &errors)
2223 {
2224         ChangeLocale change_locale(LC_NUMERIC, "C");
2225         try
2226         {
2227                 total_warnings_=0;
2228                 if(node)
2229                 {
2230                         Canvas::Handle canvas(parse_canvas(node,0,false,""));
2231                         if (!canvas) return canvas;
2232
2233                         const ValueNodeList& value_node_list(canvas->value_node_list());
2234
2235                         again:
2236                         ValueNodeList::const_iterator iter;
2237                         for(iter=value_node_list.begin();iter!=value_node_list.end();++iter)
2238                         {
2239                                 ValueNode::Handle value_node(*iter);
2240                                 if(value_node->is_exported() && value_node->get_id().find("Unnamed")==0)
2241                                 {
2242                                         canvas->remove_value_node(value_node);
2243                                         goto again;
2244                                 }
2245                         }
2246
2247                         return canvas;
2248                 }
2249         }
2250         catch(Exception::BadLinkName) { synfig::error("BadLinkName Thrown"); }
2251         catch(Exception::BadType) { synfig::error("BadType Thrown"); }
2252         catch(Exception::FileNotFound) { synfig::error("FileNotFound Thrown"); }
2253         catch(Exception::IDNotFound) { synfig::error("IDNotFound Thrown"); }
2254         catch(Exception::IDAlreadyExists) { synfig::error("IDAlreadyExists Thrown"); }
2255         catch(xmlpp::internal_error x)
2256         {
2257                 if (!strcmp(x.what(), "Couldn't create parsing context"))
2258                         throw runtime_error(String("  * ") + _("Can't open file") + " \"" + "\"");
2259                 throw;
2260         }
2261         catch(const std::exception& ex)
2262         {
2263                 synfig::error("Standard Exception: "+String(ex.what()));
2264                 errors = ex.what();
2265                 return Canvas::Handle();
2266         }
2267         catch(const String& str)
2268         {
2269                 cerr<<str<<endl;
2270                 errors = str;
2271                 return Canvas::Handle();
2272         }
2273         return Canvas::Handle();
2274 }
2275 //extern
2276 Canvas::Handle
2277 synfig::open_canvas(xmlpp::Element* node,String &errors,String &warnings){
2278         Canvas::Handle canvas;
2279         CanvasParser parser;
2280         parser.set_allow_errors(true);
2281         try
2282         {
2283                 canvas=parser.parse_as(node,errors);
2284         }
2285         catch (...)
2286         {
2287                 synfig::error("open canvas of a node");
2288                 throw;
2289         }
2290
2291         warnings = parser.get_warnings_text();
2292
2293         if(parser.error_count())
2294         {
2295                 errors = parser.get_errors_text();
2296                 return Canvas::Handle();
2297         }
2298         return canvas;
2299 }
2300
2301