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 **
  10 **      This package is free software; you can redistribute it and/or
  11 **      modify it under the terms of the GNU General Public License as
  12 **      published by the Free Software Foundation; either version 2 of
  13 **      the License, or (at your option) any later version.
  14 **
  15 **      This package is distributed in the hope that it will be useful,
  16 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18 **      General Public License for more details.
  19 **      \endlegal
  20 */
  21 /* ========================================================================= */
  22
  23 /* === H E A D E R S ======================================================= */
  24
  25 #ifdef USING_PCH
  26 #       include "pch.h"
  27 #else
  28 #ifdef HAVE_CONFIG_H
  29 #       include <config.h>
  30 #endif
  31
  32 #include <cstdlib>
  33 #include <cstdio>
  34 #include <cstring>
  35 #include <ETL/stringf>
  36 #include <libxml++/libxml++.h>
  37 #include <vector>
  38 #include <stdexcept>
  39 #include <iostream>
  40
  41 #include "loadcanvas.h"
  42 #include "valuenode.h"
  43 #include "valuenode_subtract.h"
  44 #include "valuenode_animated.h"
  45 #include "valuenode_composite.h"
  46 #include "valuenode_const.h"
  47 #include "valuenode_linear.h"
  48 #include "valuenode_dynamiclist.h"
  49 #include "valuenode_reference.h"
  50 #include "valuenode_scale.h"
  51 #include "valuenode_timedswap.h"
  52 #include "valuenode_twotone.h"
  53 #include "valuenode_stripes.h"
  54 #include "valuenode_segcalctangent.h"
  55 #include "valuenode_segcalcvertex.h"
  56 #include "valuenode_bline.h"
  57
  58 #include "layer.h"
  59 #include "string.h"
  60
  61 #include "exception.h"
  62
  63 #include "gradient.h"
  64
  65 #include <map>
  66 #include <sigc++/bind.h>
  67
  68 #endif
  69
  70 /* === U S I N G =========================================================== */
  71
  72 using namespace std;
  73 using namespace synfig;
  74 using namespace etl;
  75
  76 /*
  77 class test_class {
  78 static int bleh;
  79 public:
  80         test_class() { assert(!bleh); bleh++; synfig::info("test_class: initi: %d",bleh); }
  81         ~test_class() { assert(bleh); synfig::info("test_class: uninit: %d",bleh); bleh--; }
  82 };
  83 int test_class::bleh(0);
  84
  85 test_class test_class_instance;
  86 */
  87
  88 /* === M A C R O S ========================================================= */
  89
  90 inline bool is_whitespace(char x) { return ((x)=='\n' || (x)=='\t' || (x)==' '); }
  91
  92 /* === P R O C E D U R E S ================================================= */
  93
  94 static std::map<String, Canvas::LooseHandle>* open_canvas_map_(0);
  95
  96 std::map<synfig::String, etl::loose_handle<Canvas> >& synfig::get_open_canvas_map()
  97 {
  98         if(!open_canvas_map_)
  99                 open_canvas_map_=new std::map<String, Canvas::LooseHandle>;
 100         return *open_canvas_map_;
 101 }
 102
 103 static void _remove_from_open_canvas_map(Canvas *x) { get_open_canvas_map().erase(etl::absolute_path(x->get_file_name())); }
 104
 105 static void _canvas_file_name_changed(Canvas *x)
 106 {
 107         std::map<synfig::String, etl::loose_handle<Canvas> >::iterator iter;
 108
 109         for(iter=get_open_canvas_map().begin();iter!=get_open_canvas_map().end();++iter)
 110                 if(iter->second==x)
 111                         break;
 112         assert(iter!=get_open_canvas_map().end());
 113         if(iter==get_open_canvas_map().end())
 114                 return;
 115         get_open_canvas_map().erase(iter->first);
 116         get_open_canvas_map()[etl::absolute_path(x->get_file_name())]=x;
 117
 118 }
 119
 120 Canvas::Handle
 121 synfig::open_canvas(const String &filename)
 122 {
 123         CanvasParser parser;
 124
 125         parser.set_allow_errors(true);
 126
 127         Canvas::Handle canvas=parser.parse_from_file(filename);
 128
 129         if(parser.error_count())
 130                 return Canvas::Handle();
 131
 132         return canvas;
 133 }
 134
 135 Canvas::Handle
 136 synfig::open_canvas_as(const String &filename,const String &as)
 137 {
 138         CanvasParser parser;
 139
 140         parser.set_allow_errors(true);
 141
 142         Canvas::Handle canvas=parser.parse_from_file_as(filename,as);
 143
 144         if(parser.error_count())
 145                 return Canvas::Handle();
 146
 147         return canvas;
 148 }
 149
 150 Canvas::Handle
 151 synfig::string_to_canvas(const String &data)
 152 {
 153         CanvasParser parser;
 154
 155         parser.set_allow_errors(true);
 156
 157         Canvas::Handle canvas=parser.parse_from_string(data);
 158
 159         if(parser.error_count())
 160                 return Canvas::Handle();
 161
 162         return canvas;
 163 }
 164
 165 /* === M E T H O D S ======================================================= */
 166
 167 void
 168 CanvasParser::error_unexpected_element(xmlpp::Node *element,const String &got, const String &expected)
 169 {
 170         error(element,strprintf(_("Unexpected element <%s>, Expected <%s>"),got.c_str(),expected.c_str()));
 171 }
 172
 173 void
 174 CanvasParser::error_unexpected_element(xmlpp::Node *element,const String &got)
 175 {
 176         error(element,strprintf(_("Unexpected element <%s>"),got.c_str()));
 177 }
 178
 179 void
 180 CanvasParser::warning(xmlpp::Node *element, const String &text)
 181 {
 182         string str=strprintf("%s:<%s>:%d: warning: ",filename.c_str(),element->get_name().c_str(),element->get_line())+text;
 183         //synfig::warning(str);
 184         cerr<<str<<endl;
 185         total_warnings_++;
 186         if(total_warnings_>=max_warnings_)
 187                 fatal_error(element, _("Too many warnings"));
 188 }
 189
 190 void
 191 CanvasParser::error(xmlpp::Node *element, const String &text)
 192 {
 193         string str=strprintf("%s:<%s>:%d: error: ",filename.c_str(),element->get_name().c_str(),element->get_line())+text;
 194         total_errors_++;
 195         if(!allow_errors_)
 196                 throw runtime_error(str);
 197         cerr<<str<<endl;
 198         //      synfig::error(str);
 199 }
 200
 201 void
 202 CanvasParser::fatal_error(xmlpp::Node *element, const String &text)
 203 {
 204         string str=strprintf("%s:<%s>:%d:",filename.c_str(),element->get_name().c_str(),element->get_line())+text;
 205         throw runtime_error(str);
 206 }
 207
 208
 209
 210 Keyframe
 211 CanvasParser::parse_keyframe(xmlpp::Element *element,Canvas::Handle canvas)
 212 {
 213         assert(element->get_name()=="keyframe");
 214
 215         if(!element->get_attribute("time"))
 216         {
 217                 error(element,strprintf(_("<%s> is missing \"%s\" attribute"),"real","time"));
 218                 return Keyframe();
 219         }
 220
 221         Keyframe ret(Time(element->get_attribute("time")->get_value(),canvas->rend_desc().get_frame_rate()));
 222
 223
 224         if(element->get_children().empty())
 225                 return ret;
 226
 227         if(element->get_child_text()->get_content().empty())
 228                 return ret;
 229
 230         ret.set_description(element->get_child_text()->get_content());
 231
 232         return ret;
 233 }
 234
 235
 236 Real
 237 CanvasParser::parse_real(xmlpp::Element *element)
 238 {
 239         assert(element->get_name()=="real");
 240
 241         if(!element->get_children().empty())
 242                 warning(element, strprintf(_("<%s> should not contain anything"),"real"));
 243
 244         if(!element->get_attribute("value"))
 245         {
 246                 error(element,strprintf(_("<%s> is missing \"value\" attribute"),"real"));
 247                 return false;
 248         }
 249
 250         string val=element->get_attribute("value")->get_value();
 251
 252         return atof(val.c_str());
 253 }
 254
 255 Time
 256 CanvasParser::parse_time(xmlpp::Element *element,Canvas::Handle canvas)
 257 {
 258         assert(element->get_name()=="time");
 259
 260         if(!element->get_children().empty())
 261                 warning(element, strprintf(_("<%s> should not contain anything"),"time"));
 262
 263         if(!element->get_attribute("value"))
 264         {
 265                 error(element,strprintf(_("<%s> is missing \"value\" attribute"),"time"));
 266                 return false;
 267         }
 268
 269         string val=element->get_attribute("value")->get_value();
 270
 271         return Time(val,canvas->rend_desc().get_frame_rate());
 272 }
 273
 274 int
 275 CanvasParser::parse_integer(xmlpp::Element *element)
 276 {
 277         assert(element->get_name()=="integer");
 278
 279         if(!element->get_children().empty())
 280                 warning(element, strprintf(_("<%s> should not contain anything"),"integer"));
 281
 282         if(!element->get_attribute("value"))
 283         {
 284                 error(element,strprintf(_("<%s> is missing \"value\" attribute"),"integer"));
 285                 return false;
 286         }
 287
 288         string val=element->get_attribute("value")->get_value();
 289
 290         return atoi(val.c_str());
 291 }
 292
 293 Vector
 294 CanvasParser::parse_vector(xmlpp::Element *element)
 295 {
 296         assert(element->get_name()=="vector");
 297
 298         if(element->get_children().empty())
 299         {
 300                 error(element, "Undefined value in <vector>");
 301                 return Vector();
 302         }
 303
 304         Vector vect;
 305
 306         xmlpp::Element::NodeList list = element->get_children();
 307         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 308         {
 309                 xmlpp::Element *child=dynamic_cast<xmlpp::Element*>((xmlpp::Node*)*iter);
 310                 if(!child)
 311                         continue;
 312                 else
 313                 if(child->get_name()=="x")
 314                 {
 315                         if(child->get_children().empty())
 316                         {
 317                                 error(element, "Undefined value in <x>");
 318                                 return Vector();
 319                         }
 320                         vect[0]=atof(child->get_child_text()->get_content().c_str());
 321                 }
 322                 else
 323                 if(child->get_name()=="y")
 324                 {
 325                         if(child->get_children().empty())
 326                         {
 327                                 error(element, "Undefined value in <y>");
 328                                 return Vector();
 329                         }
 330                         vect[1]=atof(child->get_child_text()->get_content().c_str());
 331                 }
 332                 else
 333                         error_unexpected_element(child,child->get_name());
 334         }
 335         return vect;
 336 }
 337
 338 Color
 339 CanvasParser::parse_color(xmlpp::Element *element)
 340 {
 341         assert(element->get_name()=="color");
 342
 343         if(element->get_children().empty())
 344         {
 345                 error(element, "Undefined value in <color>");
 346                 return Color();
 347         }
 348
 349         Color color(0);
 350
 351         xmlpp::Element::NodeList list = element->get_children();
 352         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 353         {
 354                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 355                 if(!child)
 356                         continue;
 357                 else
 358                 if(child->get_name()=="r")
 359                 {
 360                         if(child->get_children().empty())
 361                         {
 362                                 error(element, "Undefined value in <r>");
 363                                 return Color();
 364                         }
 365                         color.set_r(atof(child->get_child_text()->get_content().c_str()));
 366                 }
 367                 else
 368                 if(child->get_name()=="g")
 369                 {
 370                         if(child->get_children().empty())
 371                         {
 372                                 error(element, "Undefined value in <g>");
 373                                 return Color();
 374                         }
 375                         color.set_g(atof(child->get_child_text()->get_content().c_str()));
 376                 }
 377                 else
 378                 if(child->get_name()=="b")
 379                 {
 380                         if(child->get_children().empty())
 381                         {
 382                                 error(element, "Undefined value in <b>");
 383                                 return Color();
 384                         }
 385                         color.set_b(atof(child->get_child_text()->get_content().c_str()));
 386                 }
 387                 else
 388                 if(child->get_name()=="a")
 389                 {
 390                         if(child->get_children().empty())
 391                         {
 392                                 error(element, "Undefined value in <a>");
 393                                 return Color();
 394                         }
 395                         color.set_a(atof(child->get_child_text()->get_content().c_str()));
 396                 }
 397                 else
 398                         error_unexpected_element(child,child->get_name());
 399         }
 400
 401         return color;
 402 }
 403
 404 synfig::String
 405 CanvasParser::parse_string(xmlpp::Element *element)
 406 {
 407         assert(element->get_name()=="string");
 408
 409         if(element->get_children().empty())
 410         {
 411                 warning(element, "Undefined value in <string>");
 412                 return synfig::String();
 413         }
 414
 415         if(element->get_child_text()->get_content().empty())
 416         {
 417                 warning(element, "Content element of <string> appears to be empty");
 418                 return synfig::String();
 419         }
 420
 421         return element->get_child_text()->get_content();
 422 }
 423
 424 bool
 425 CanvasParser::parse_bool(xmlpp::Element *element)
 426 {
 427         assert(element->get_name()=="bool");
 428
 429         if(!element->get_children().empty())
 430                 warning(element, strprintf(_("<%s> should not contain anything"),"bool"));
 431
 432         if(!element->get_attribute("value"))
 433         {
 434                 error(element,strprintf(_("<%s> is missing \"value\" attribute"),"bool"));
 435                 return false;
 436         }
 437
 438         string val=element->get_attribute("value")->get_value();
 439
 440         if(val=="true" || val=="1")
 441                 return true;
 442         if(val=="false" || val=="0")
 443                 return false;
 444
 445         error(element,strprintf(_("Bad value \"%s\" in <%s>"),val.c_str(),"bool"));
 446
 447         return false;
 448 }
 449
 450 Gradient
 451 CanvasParser::parse_gradient(xmlpp::Element *node)
 452 {
 453         assert(node->get_name()=="gradient");
 454         Gradient ret;
 455
 456         xmlpp::Element::NodeList list = node->get_children();
 457         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 458         {
 459                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 460                 if(!child)
 461                         continue;
 462                 else
 463                 {
 464                         Gradient::CPoint cpoint;
 465                         cpoint.color=parse_color(child);
 466
 467                         if(!child->get_attribute("pos"))
 468                         {
 469                                 error(child,strprintf(_("<%s> is missing \"pos\" attribute"),"gradient"));
 470                                 return Gradient();
 471                         }
 472
 473                         cpoint.pos=atof(child->get_attribute("pos")->get_value().c_str());
 474
 475                         ret.push_back(cpoint);
 476                 }
 477         }
 478         ret.sort();
 479         return ret;
 480 }
 481
 482 ValueBase
 483 CanvasParser::parse_list(xmlpp::Element *element,Canvas::Handle canvas)
 484 {
 485         vector<ValueBase> value_list;
 486
 487         xmlpp::Element::NodeList list = element->get_children();
 488         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 489         {
 490                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 491                 if(!child)
 492                         continue;
 493                 else
 494                 {
 495                         value_list.push_back(parse_value(child,canvas));
 496                         if(!value_list.back().is_valid())
 497                         {
 498                                 value_list.pop_back();
 499                                 error(child,"Bad ValueBase");
 500                                 continue;
 501                         }
 502                 }
 503         }
 504         return value_list;
 505 }
 506
 507 Segment
 508 CanvasParser::parse_segment(xmlpp::Element *element)
 509 {
 510         assert(element->get_name()=="segment");
 511
 512         if(element->get_children().empty())
 513         {
 514                 error(element, "Undefined value in <segment>");
 515                 return Segment();
 516         }
 517
 518         Segment seg;
 519
 520         xmlpp::Element::NodeList list = element->get_children();
 521         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 522         {
 523                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 524                 if(!child)
 525                         continue;
 526                 else
 527                 if(child->get_name()=="p1")
 528                 {
 529                         xmlpp::Element::NodeList list = child->get_children();
 530                         xmlpp::Element::NodeList::iterator iter;
 531
 532                         // Search for the first non-text XML element
 533                         for(iter = list.begin(); iter != list.end(); ++iter)
 534                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 535
 536                         if(iter==list.end())
 537                         {
 538                                 error(element, "Undefined value in <p1>");
 539                                 continue;
 540                         }
 541
 542                         if((*iter)->get_name()!="vector")
 543                         {
 544                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 545                                 continue;
 546                         }
 547
 548                         seg.p1=parse_vector(dynamic_cast<xmlpp::Element*>(*iter));
 549                 }
 550                 else
 551                 if(child->get_name()=="t1")
 552                 {
 553                         xmlpp::Element::NodeList list = child->get_children();
 554                         xmlpp::Element::NodeList::iterator iter;
 555
 556                         // Search for the first non-text XML element
 557                         for(iter = list.begin(); iter != list.end(); ++iter)
 558                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 559
 560                         if(iter==list.end())
 561                         {
 562                                 error(element, "Undefined value in <t1>");
 563                                 continue;
 564                         }
 565
 566                         if((*iter)->get_name()!="vector")
 567                         {
 568                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 569                                 continue;
 570                         }
 571
 572                         seg.t1=parse_vector(dynamic_cast<xmlpp::Element*>(*iter));
 573                 }
 574                 else
 575                 if(child->get_name()=="p2")
 576                 {
 577                         xmlpp::Element::NodeList list = child->get_children();
 578                         xmlpp::Element::NodeList::iterator iter;
 579
 580                         // Search for the first non-text XML element
 581                         for(iter = list.begin(); iter != list.end(); ++iter)
 582                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 583
 584                         if(iter==list.end())
 585                         {
 586                                 error(element, "Undefined value in <p2>");
 587                                 continue;
 588                         }
 589
 590                         if((*iter)->get_name()!="vector")
 591                         {
 592                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 593                                 continue;
 594                         }
 595
 596                         seg.p2=parse_vector(dynamic_cast<xmlpp::Element*>(*iter));
 597                 }
 598                 else
 599                 if(child->get_name()=="t2")
 600                 {
 601                         xmlpp::Element::NodeList list = child->get_children();
 602                         xmlpp::Element::NodeList::iterator iter;
 603
 604                         // Search for the first non-text XML element
 605                         for(iter = list.begin(); iter != list.end(); ++iter)
 606                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 607
 608                         if(iter==list.end())
 609                         {
 610                                 error(element, "Undefined value in <t2>");
 611                                 continue;
 612                         }
 613
 614                         if((*iter)->get_name()!="vector")
 615                         {
 616                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 617                                 continue;
 618                         }
 619
 620                         seg.t2=parse_vector(dynamic_cast<xmlpp::Element*>(*iter));
 621                 }
 622                 else
 623                         error_unexpected_element(child,child->get_name());
 624         }
 625         return seg;
 626 }
 627
 628 BLinePoint
 629 CanvasParser::parse_bline_point(xmlpp::Element *element)
 630 {
 631         assert(element->get_name()=="bline_point");
 632         if(element->get_children().empty())
 633         {
 634                 error(element, "Undefined value in <bline_point>");
 635                 return BLinePoint();
 636         }
 637
 638         BLinePoint ret;
 639         ret.set_split_tangent_flag(false);
 640
 641         xmlpp::Element::NodeList list = element->get_children();
 642         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 643         {
 644                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 645                 if(!child)
 646                         continue;
 647                 else
 648                 // Vertex
 649                 if(child->get_name()[0]=='v' || child->get_name()=="p1")
 650                 {
 651                         xmlpp::Element::NodeList list = child->get_children();
 652                         xmlpp::Element::NodeList::iterator iter;
 653
 654                         // Search for the first non-text XML element
 655                         for(iter = list.begin(); iter != list.end(); ++iter)
 656                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 657
 658                         if(iter==list.end())
 659                         {
 660                                 error(element, "Undefined value in <vertex>");
 661                                 continue;
 662                         }
 663
 664                         if((*iter)->get_name()!="vector")
 665                         {
 666                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 667                                 continue;
 668                         }
 669
 670                         ret.set_vertex(parse_vector(dynamic_cast<xmlpp::Element*>(*iter)));
 671                 }
 672                 else
 673                 // Tangent 1
 674                 if(child->get_name()=="t1" || child->get_name()=="tangent")
 675                 {
 676                         xmlpp::Element::NodeList list = child->get_children();
 677                         xmlpp::Element::NodeList::iterator iter;
 678
 679                         // Search for the first non-text XML element
 680                         for(iter = list.begin(); iter != list.end(); ++iter)
 681                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 682
 683                         if(iter==list.end())
 684                         {
 685                                 error(element, "Undefined value in <t1>");
 686                                 continue;
 687                         }
 688
 689                         if((*iter)->get_name()!="vector")
 690                         {
 691                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 692                                 continue;
 693                         }
 694
 695                         ret.set_tangent1(parse_vector(dynamic_cast<xmlpp::Element*>(*iter)));
 696                 }
 697                 else
 698                 // Tangent 2
 699                 if(child->get_name()=="t2")
 700                 {
 701                         xmlpp::Element::NodeList list = child->get_children();
 702                         xmlpp::Element::NodeList::iterator iter;
 703
 704                         // Search for the first non-text XML element
 705                         for(iter = list.begin(); iter != list.end(); ++iter)
 706                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 707
 708                         if(iter==list.end())
 709                         {
 710                                 error(element, "Undefined value in <t2>");
 711                                 continue;
 712                         }
 713
 714                         if((*iter)->get_name()!="vector")
 715                         {
 716                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 717                                 continue;
 718                         }
 719
 720                         ret.set_tangent2(parse_vector(dynamic_cast<xmlpp::Element*>(*iter)));
 721                         ret.set_split_tangent_flag(true);
 722                 }
 723                 else
 724                 // width
 725                 if(child->get_name()=="width")
 726                 {
 727                         xmlpp::Element::NodeList list = child->get_children();
 728                         xmlpp::Element::NodeList::iterator iter;
 729
 730                         // Search for the first non-text XML element
 731                         for(iter = list.begin(); iter != list.end(); ++iter)
 732                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 733
 734                         if(iter==list.end())
 735                         {
 736                                 error(element, "Undefined value in <width>");
 737                                 continue;
 738                         }
 739
 740                         if((*iter)->get_name()!="real")
 741                         {
 742                                 error_unexpected_element((*iter),(*iter)->get_name(),"real");
 743                                 continue;
 744                         }
 745
 746                         ret.set_width(parse_real(dynamic_cast<xmlpp::Element*>(*iter)));
 747                 }
 748                 else
 749                 // origin
 750                 if(child->get_name()=="origin")
 751                 {
 752                         xmlpp::Element::NodeList list = child->get_children();
 753                         xmlpp::Element::NodeList::iterator iter;
 754
 755                         // Search for the first non-text XML element
 756                         for(iter = list.begin(); iter != list.end(); ++iter)
 757                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 758
 759                         if(iter==list.end())
 760                         {
 761                                 error(element, "Undefined value in <origin>");
 762                                 continue;
 763                         }
 764
 765                         if((*iter)->get_name()!="real")
 766                         {
 767                                 error_unexpected_element((*iter),(*iter)->get_name(),"real");
 768                                 continue;
 769                         }
 770
 771                         ret.set_origin(parse_real(dynamic_cast<xmlpp::Element*>(*iter)));
 772                 }
 773                 else
 774                         error_unexpected_element(child,child->get_name());
 775         }
 776         return ret;
 777 }
 778
 779 Angle
 780 CanvasParser::parse_angle(xmlpp::Element *element)
 781 {
 782         assert(element->get_name()=="angle");
 783
 784         if(!element->get_children().empty())
 785                 warning(element, strprintf(_("<%s> should not contain anything"),"angle"));
 786
 787         if(!element->get_attribute("value"))
 788         {
 789                 error(element,strprintf(_("<%s> is missing \"value\" attribute"),"angle"));
 790                 return Angle();
 791         }
 792
 793         string val=element->get_attribute("value")->get_value();
 794
 795         return Angle::deg(atof(val.c_str()));
 796 }
 797
 798 ValueBase
 799 CanvasParser::parse_value(xmlpp::Element *element,Canvas::Handle canvas)
 800 {
 801         if(element->get_name()=="real")
 802                 return parse_real(element);
 803         else
 804         if(element->get_name()=="time")
 805                 return parse_time(element,canvas);
 806         else
 807         if(element->get_name()=="integer")
 808                 return parse_integer(element);
 809         else
 810         if(element->get_name()=="string")
 811                 return parse_string(element);
 812         else
 813         if(element->get_name()=="vector")
 814                 return parse_vector(element);
 815         else
 816         if(element->get_name()=="color")
 817                 return parse_color(element);
 818         else
 819         if(element->get_name()=="segment")
 820                 return parse_segment(element);
 821         else
 822         if(element->get_name()=="list")
 823                 return parse_list(element,canvas);
 824         else
 825         if(element->get_name()=="gradient")
 826                 return parse_gradient(element);
 827         else
 828         if(element->get_name()=="bool")
 829                 return parse_bool(element);
 830         else
 831         //if(element->get_name()=="canvas")
 832         //      return parse_canvas(element,canvas,true);       // inline canvas
 833         //else
 834         if(element->get_name()=="angle" || element->get_name()=="degrees" || element->get_name()=="radians" || element->get_name()=="rotations")
 835                 return parse_angle(element);
 836         else
 837         if(element->get_name()=="bline_point")
 838                 return parse_bline_point(element);
 839         else
 840         if(element->get_name()=="canvas")
 841                 return ValueBase(parse_canvas(element,canvas,true));
 842         else
 843         {
 844                 DEBUGPOINT();
 845                 error_unexpected_element(element,element->get_name());
 846         }
 847
 848         return ValueBase();
 849 }
 850
 851
 852
 853
 854 ValueNode_Animated::Handle
 855 CanvasParser::parse_animated(xmlpp::Element *element,Canvas::Handle canvas)
 856 {
 857         assert(element->get_name()=="hermite" || element->get_name()=="animated");
 858
 859         if(!element->get_attribute("type"))
 860         {
 861                 error(element,"Missing attribute \"type\" in <animated>");
 862                 return ValueNode_Animated::Handle();
 863         }
 864
 865         ValueBase::Type type=ValueBase::ident_type(element->get_attribute("type")->get_value());
 866
 867         if(!type)
 868         {
 869                 error(element,"Bad type in <animated>");
 870                 return ValueNode_Animated::Handle();
 871         }
 872
 873         ValueNode_Animated::Handle value_node=ValueNode_Animated::create(type);
 874
 875         if(!value_node)
 876         {
 877                 error(element,strprintf(_("Unable to create <animated> with type \"%s\""),ValueBase::type_name(type).c_str()));
 878                 return ValueNode_Animated::Handle();
 879         }
 880
 881         value_node->set_root_canvas(canvas->get_root());
 882
 883         xmlpp::Element::NodeList list = element->get_children();
 884         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 885         {
 886                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 887                 if(!child)
 888                         continue;
 889                 else
 890                 if(child->get_name()=="waypoint")
 891                 {
 892                         if(!child->get_attribute("time"))
 893                         {
 894                                 error(child,_("<waypoint> is missing attribute \"time\""));
 895                                 continue;
 896                         }
 897
 898                         Time time(child->get_attribute("time")->get_value(),canvas->rend_desc().get_frame_rate());
 899
 900
 901                         ValueNode::Handle waypoint_value_node;
 902                         xmlpp::Element::NodeList list = child->get_children();
 903
 904                         if(child->get_attribute("use"))
 905                         {
 906                                 if(!list.empty())
 907                                         warning(child,_("Found \"use\" attribute for <waypoint>, but it wasn't empty. Ignoring contents..."));
 908
 909                                 // the waypoint might look like this, in which case we won't find "mycanvas" in the list of valuenodes, 'cos it's a canvas
 910                                 //
 911                                 //      <animated type="canvas">
 912                                 //        <waypoint time="0s" use="mycanvas"/>
 913                                 //      </animated>
 914                                 if (type==ValueBase::TYPE_CANVAS)
 915                                         waypoint_value_node=ValueNode_Const::create(canvas->surefind_canvas(child->get_attribute("use")->get_value()));
 916                                 else
 917                                         waypoint_value_node=canvas->surefind_value_node(child->get_attribute("use")->get_value());
 918                         }
 919                         else
 920                         {
 921                                 if(child->get_children().empty())
 922                                 {
 923                                         error(child, strprintf(_("<%s> is missing its data"),"waypoint"));
 924                                         continue;
 925                                 }
 926
 927                                 xmlpp::Element::NodeList::iterator iter;
 928
 929                                 // Search for the first non-text XML element
 930                                 for(iter = list.begin(); iter != list.end(); ++iter)
 931                                         if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 932
 933                                 if(iter==list.end())
 934                                 {
 935                                         error(child, strprintf(_("<%s> is missing its data"),"waypoint"));
 936                                         continue;
 937                                 }
 938
 939                                 waypoint_value_node=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
 940
 941                                 /*
 942                                 ValueBase data=parse_value(dynamic_cast<xmlpp::Element*>(*iter),canvas);
 943
 944                                 if(!data.is_valid())
 945                                 {
 946                                         error(child,_("Bad data for <waypoint>"));
 947                                         continue;
 948                                 }
 949                                 */
 950                                 if(!waypoint_value_node)
 951                                 {
 952                                         error(child,_("Bad data for <waypoint>"));
 953                                         continue;
 954                                 }
 955
 956                                 /*! HACK -- This is a temporary fix to help repair some
 957                                 **      weirdness that is currently going on (10-21-2004).
 958                                 **      This short circuits the linking of waypoints,
 959                                 **      a feature which is so obscure that we can get
 960                                 **      away with something like this pretty easily.
 961                                 */
 962                                 waypoint_value_node=waypoint_value_node->clone();
 963
 964                                 // Warn if there is trash after the param value
 965                                 for(iter++; iter != list.end(); ++iter)
 966                                         if(dynamic_cast<xmlpp::Element*>(*iter))
 967                                                 warning((*iter),strprintf(_("Unexpected element <%s> after <waypoint> data, ignoring..."),(*iter)->get_name().c_str()));
 968                         }
 969
 970
 971                         try {
 972                                 ValueNode_Animated::WaypointList::iterator waypoint=value_node->new_waypoint(time,waypoint_value_node);
 973
 974                         if(child->get_attribute("tension"))
 975                         {
 976                                 synfig::String str(child->get_attribute("tension")->get_value());
 977                                 waypoint->set_tension(atof(str.c_str()));
 978                         }
 979                         if(child->get_attribute("temporal-tension"))
 980                         {
 981                                 synfig::String str(child->get_attribute("temporal-tension")->get_value());
 982                                 waypoint->set_time_tension(atof(str.c_str()));
 983                         }
 984                         if(child->get_attribute("continuity"))
 985                         {
 986                                 synfig::String str(child->get_attribute("continuity")->get_value());
 987                                 waypoint->set_continuity(atof(str.c_str()));
 988                         }
 989                         if(child->get_attribute("bias"))
 990                         {
 991                                 synfig::String str(child->get_attribute("bias")->get_value());
 992                                 waypoint->set_bias(atof(str.c_str()));
 993                         }
 994
 995                         if(child->get_attribute("before"))
 996                         {
 997                                 string val=child->get_attribute("before")->get_value();
 998                                 if(val=="halt")
 999                                         waypoint->set_before(INTERPOLATION_HALT);
1000                                 else if(val=="constant")
1001                                         waypoint->set_before(INTERPOLATION_CONSTANT);
1002                                 else if(val=="linear")
1003                                         waypoint->set_before(INTERPOLATION_LINEAR);
1004                                 else if(val=="manual")
1005                                         waypoint->set_before(INTERPOLATION_MANUAL);
1006                                 else if(val=="auto")
1007                                         waypoint->set_before(INTERPOLATION_TCB);
1008                                 else
1009                                         error(child,strprintf(_("\"%s\" not a valid value for attribute \"%s\" in <%s>"),val.c_str(),"before","waypoint"));
1010                         }
1011
1012                         if(child->get_attribute("after"))
1013                         {
1014                                 string val=child->get_attribute("after")->get_value();
1015                                 if(val=="halt")
1016                                         waypoint->set_after(INTERPOLATION_HALT);
1017                                 else if(val=="constant")
1018                                         waypoint->set_after(INTERPOLATION_CONSTANT);
1019                                 else if(val=="linear")
1020                                         waypoint->set_after(INTERPOLATION_LINEAR);
1021                                 else if(val=="manual")
1022                                         waypoint->set_after(INTERPOLATION_MANUAL);
1023                                 else if(val=="auto")
1024                                         waypoint->set_after(INTERPOLATION_TCB);
1025                                 else
1026                                         error(child,strprintf(_("\"%s\" not a valid value for attribute \"%s\" in <%s>"),val.c_str(),"before","waypoint"));
1027                         }
1028                         }
1029                         catch(Exception::BadTime x)
1030                         {
1031                                 warning(child,x.what());
1032                         }
1033                         continue;
1034
1035                 }
1036                 else
1037                         error_unexpected_element(child,child->get_name());
1038         }
1039         value_node->changed();
1040         return value_node;
1041 }
1042
1043 etl::handle<LinkableValueNode>
1044 CanvasParser::parse_linkable_value_node(xmlpp::Element *element,Canvas::Handle canvas)
1045 {
1046         handle<LinkableValueNode> value_node;
1047         ValueBase::Type type;
1048
1049         // Determine the type
1050         if(element->get_attribute("type"))
1051         {
1052                 type=ValueBase::ident_type(element->get_attribute("type")->get_value());
1053
1054                 if(!type)
1055                 {
1056                         error(element,"Bad type in ValueNode");
1057                         return 0;
1058                 }
1059         }
1060         else
1061         {
1062                 error(element,"Missing type in ValueNode");
1063                 return 0;
1064         }
1065
1066         value_node=LinkableValueNode::create(element->get_name(),type);
1067
1068         if(!value_node)
1069         {
1070                 error(element,"Unknown ValueNode type "+element->get_name());
1071                 return 0;
1072         }
1073
1074         if(value_node->get_type()!=type)
1075         {
1076                 error(element,"ValueNode did not accept type");
1077                 return 0;
1078         }
1079
1080         value_node->set_root_canvas(canvas->get_root());
1081
1082         int i;
1083         for(i=0;i<value_node->link_count();i++)
1084         {
1085                 if(element->get_attribute(value_node->link_name(i)))
1086                 try {
1087                         String id(element->get_attribute(value_node->link_name(i))->get_value());
1088
1089                         if(!value_node->set_link(i,
1090                                         canvas->surefind_value_node(
1091                                                 id
1092                                         )
1093                                 )
1094                         ) error(element,strprintf(_("Unable to set link \"%s\" to ValueNode \"%s\" (link #%d in \"%s\")"),value_node->link_name(i).c_str(),id.c_str(),i,value_node->get_name().c_str()));
1095                 }
1096                 catch(Exception::IDNotFound)
1097                 {
1098                         error(element,"Unable to resolve "+element->get_attribute(value_node->link_name(i))->get_value());
1099                 }
1100                 catch(Exception::FileNotFound)
1101                 {
1102                         error(element,"Unable to open file referenced in "+element->get_attribute(value_node->link_name(i))->get_value());
1103                 }
1104                 catch(...)
1105                 {
1106                         error(element,strprintf(_("Unknown Exception thrown when referencing ValueNode \"%s\""),
1107                                 element->get_attribute(value_node->link_name(i))->get_value().c_str()));
1108                         throw;
1109                 }
1110         }
1111
1112
1113
1114         xmlpp::Element::NodeList list = element->get_children();
1115         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1116         {
1117                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1118                 try
1119                 {
1120                         if(!child)
1121                                 continue;
1122                         int index=value_node->get_link_index_from_name(child->get_name());
1123
1124                         xmlpp::Element::NodeList list = child->get_children();
1125                         xmlpp::Element::NodeList::iterator iter;
1126
1127                         // Search for the first non-text XML element
1128                         for(iter = list.begin(); iter != list.end(); ++iter)
1129                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
1130
1131                         if(iter==list.end())
1132                         {
1133                                 error(child,_("element is missing its contents"));
1134                                 continue;
1135                         }
1136
1137                         ValueNode::Handle link=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1138
1139                         if(!link)
1140                         {
1141                                 error((*iter),"Parse of ValueNode failed");
1142                         }
1143                         else
1144                         if(!value_node->set_link(index,link))
1145                         {
1146                                 //error(dynamic_cast<xmlpp::Element*>(*iter),strprintf("Unable to connect value node ('%s' of type '%s') to link %d",link->get_name().c_str(),ValueBase::type_name(link->get_type()).c_str(),index));
1147                                 error(element,strprintf("Unable to connect value node ('%s' of type '%s') to link %d",link->get_name().c_str(),ValueBase::type_name(link->get_type()).c_str(),index));
1148                         }
1149
1150                         // \todo do a search for more elements and warn if they are found
1151
1152                 }
1153                 catch(Exception::BadLinkName)
1154                 {
1155                         error_unexpected_element(child,child->get_name());
1156                 }
1157                 catch(...)
1158                 {
1159                         error(child,strprintf(_("Unknown Exception thrown when working on element \"%s\""),child->get_name().c_str()));
1160                         throw;
1161                 }
1162         }
1163
1164         return value_node;
1165 }
1166
1167 handle<ValueNode_Composite>
1168 CanvasParser::parse_composite(xmlpp::Element *element,Canvas::Handle canvas)
1169 {
1170         assert(element->get_name()=="composite");
1171
1172         if(!element->get_attribute("type"))
1173         {
1174                 error(element,"Missing attribute \"type\" in <composite>");
1175                 return handle<ValueNode_Composite>();
1176         }
1177
1178         ValueBase::Type type=ValueBase::ident_type(element->get_attribute("type")->get_value());
1179
1180         if(!type)
1181         {
1182                 error(element,"Bad type in <composite>");
1183                 return handle<ValueNode_Composite>();
1184         }
1185
1186         handle<ValueNode_Composite> value_node=ValueNode_Composite::create(type);
1187         handle<ValueNode> c[6];
1188
1189         if(!value_node)
1190         {
1191                 error(element,strprintf(_("Unable to create <composite>")));
1192                 return handle<ValueNode_Composite>();
1193         }
1194
1195         int i;
1196
1197         for(i=0;i<value_node->link_count();i++)
1198         {
1199                 string name=strprintf("c%d",i+1);
1200                 if(c[i])
1201                 {
1202                         error(element,name+" was already defined in <composite>");
1203                         continue;
1204                 }
1205                 if(element->get_attribute(name))
1206                 {
1207                         c[i]=canvas->surefind_value_node(element->get_attribute(name)->get_value());
1208                         if(c[i])
1209                         {
1210                                 if(!value_node->set_link(i,c[i]))
1211                                 {
1212                                         error(element,'"'+name+"\" attribute in <composite> has bad type");
1213                                 }
1214                         }
1215                         else
1216                                 error(element,'"'+name+"\" attribute in <composite> references unknown ID");
1217                 }
1218         }
1219
1220         xmlpp::Element::NodeList list = element->get_children();
1221         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1222         {
1223                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1224                 if(!child)
1225                         continue;
1226                 else
1227                 for(i=0;i<value_node->link_count();i++)
1228                 {
1229                         string name=strprintf("c%d",i+1);
1230                         if(child->get_name()==name)
1231                         {
1232                                 if(c[i])
1233                                 {
1234                                         error(child,name+" was already defined in <composite>");
1235                                         break;
1236                                 }
1237
1238                                 xmlpp::Element::NodeList list = child->get_children();
1239                                 xmlpp::Element::NodeList::iterator iter;
1240
1241                                 // Search for the first non-text XML element
1242                                 for(iter = list.begin(); iter != list.end(); ++iter)
1243                                         if(dynamic_cast<xmlpp::Element*>(*iter)) break;
1244
1245                                 if(iter==list.end())
1246                                 {
1247                                         error(child,strprintf(_("<%s> is missing its contents"),name.c_str()));
1248                                         break;
1249                                 }
1250
1251                                 c[i]=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1252
1253                                 if(!c[i])
1254                                 {
1255                                         error((*iter),"Parse of "+name+" ValueNode failed");
1256                                         break;
1257                                 }
1258
1259                                 if(!value_node->set_link(i,c[i]))
1260                                 {
1261                                         error(child,strprintf(_("<%s> has a bad value"),name.c_str()));
1262                                         break;
1263                                 }
1264
1265                                 // \todo do a search for more elements and warn if they are found
1266                                 break;
1267                         }
1268                 }
1269                 // somewhat of a hack, but it works
1270                 if(i==value_node->link_count()) error_unexpected_element(child,child->get_name());
1271         }
1272
1273         switch(value_node->link_count())
1274         {
1275         case 1:
1276                 if(!value_node->get_link(0))
1277                 {
1278                         error(element,"<composite> is missing parameters");
1279                         return handle<ValueNode_Composite>();
1280                 }
1281                 break;
1282         case 2:
1283                 if(!value_node->get_link(0) ||!value_node->get_link(1))
1284                 {
1285                         error(element,"<composite> is missing parameters");
1286                         return handle<ValueNode_Composite>();
1287                 }
1288                 break;
1289         case 3:
1290                 if(!value_node->get_link(0) ||!value_node->get_link(1) ||!value_node->get_link(2))
1291                 {
1292                         error(element,"<composite> is missing parameters");
1293                         return handle<ValueNode_Composite>();
1294                 }
1295                 break;
1296         case 4:
1297                 if(!value_node->get_link(0) ||!value_node->get_link(1) ||!value_node->get_link(2) ||!value_node->get_link(3))
1298                 {
1299                         error(element,"<composite> is missing parameters");
1300                         return handle<ValueNode_Composite>();
1301                 }
1302                 break;
1303     }
1304         return value_node;
1305 }
1306
1307 // This will also parse a bline
1308 handle<ValueNode_DynamicList>
1309 CanvasParser::parse_dynamic_list(xmlpp::Element *element,Canvas::Handle canvas)
1310 {
1311         assert(element->get_name()=="dynamic_list" || element->get_name()=="bline");
1312
1313         const float fps(canvas?canvas->rend_desc().get_frame_rate():0);
1314
1315         if(!element->get_attribute("type"))
1316         {
1317                 error(element,"Missing attribute \"type\" in <dynamic_list>");
1318                 return handle<ValueNode_DynamicList>();
1319         }
1320
1321         ValueBase::Type type=ValueBase::ident_type(element->get_attribute("type")->get_value());
1322
1323         if(!type)
1324         {
1325                 error(element,"Bad type in <dynamic_list>");
1326                 return handle<ValueNode_DynamicList>();
1327         }
1328
1329         handle<ValueNode_DynamicList> value_node;
1330         handle<ValueNode_BLine> bline_value_node;
1331
1332         if(element->get_name()=="bline")
1333         {
1334                 value_node=bline_value_node=ValueNode_BLine::create();
1335                 if(element->get_attribute("loop"))
1336                 {
1337                         String loop=element->get_attribute("loop")->get_value();
1338                         if(loop=="true" || loop=="1" || loop=="TRUE" || loop=="True")
1339                                 bline_value_node->set_loop(true);
1340                         else
1341                                 bline_value_node->set_loop(false);
1342                 }
1343
1344         }
1345         else
1346                 value_node=ValueNode_DynamicList::create(type);
1347
1348         if(!value_node)
1349         {
1350                 error(element,strprintf(_("Unable to create <dynamic_list>")));
1351                 return handle<ValueNode_DynamicList>();
1352         }
1353
1354         value_node->set_root_canvas(canvas->get_root());
1355
1356         xmlpp::Element::NodeList list = element->get_children();
1357         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1358         {
1359                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1360                 if(!child)
1361                         continue;
1362                 else
1363                 if(child->get_name()=="entry")
1364                 {
1365                         ValueNode_DynamicList::ListEntry list_entry;
1366
1367                         // Parse begin/end waypoints
1368                         {
1369                                 typedef synfig::ValueNode_DynamicList::ListEntry::Activepoint Activepoint;
1370                                 typedef synfig::ValueNode_DynamicList::ListEntry::ActivepointList ActivepointList;
1371
1372                                 String begin_sequence;
1373                                 String end_sequence;
1374
1375                                 ActivepointList &timing_info(list_entry.timing_info);
1376
1377                                 if(child->get_attribute("begin"))
1378                                         begin_sequence=child->get_attribute("begin")->get_value();
1379
1380                                 if(child->get_attribute("on"))
1381                                         begin_sequence=child->get_attribute("on")->get_value();
1382
1383                                 if(child->get_attribute("end"))
1384                                         end_sequence=child->get_attribute("end")->get_value();
1385
1386                                 if(child->get_attribute("off"))
1387                                         end_sequence=child->get_attribute("off")->get_value();
1388
1389                                 // clear out any auto-start
1390                                 if(!begin_sequence.empty())
1391                                         timing_info.clear();
1392
1393                                 //! \optimize
1394                                 while(!begin_sequence.empty())
1395                                 {
1396                                         String::iterator iter(find(begin_sequence.begin(),begin_sequence.end(),','));
1397                                         String timecode(begin_sequence.begin(), iter);
1398                                         int priority=0;
1399
1400                                         // skip whitespace before checking for a priority
1401                                         while (isspace(timecode[0]))
1402                                                 timecode=timecode.substr(1);
1403
1404                                         // If there is a priority, then grab it and remove
1405                                         // it from the timecode
1406                                         if(timecode[0]=='p')
1407                                         {
1408                                                 //priority=timecode[1]-'0';
1409                                                 //timecode=String(timecode.begin()+3,timecode.end());
1410                                                 int space=timecode.find_first_of(' ');
1411                                                 priority=atoi(String(timecode,1,space-1).c_str());
1412                                                 timecode=String(timecode.begin()+space+1,timecode.end());
1413                                                 //synfig::info("priority: %d      timecode: %s",priority,timecode.c_str());
1414                                         }
1415
1416                                         timing_info.push_back(
1417                                                 Activepoint(
1418                                                         Time(
1419                                                                 timecode,
1420                                                                 fps
1421                                                         ),
1422                                                         true,   // Mark as a "on" activepoint
1423                                                         priority
1424                                                 )
1425                                         );
1426
1427                                         if(iter==begin_sequence.end())
1428                                                 begin_sequence.clear();
1429                                         else
1430                                                 begin_sequence=String(iter+1,begin_sequence.end());
1431                                 }
1432
1433                                 //! \optimize
1434                                 while(!end_sequence.empty())
1435                                 {
1436                                         String::iterator iter(find(end_sequence.begin(),end_sequence.end(),','));
1437                                         String timecode(end_sequence.begin(),   iter);
1438                                         int priority=0;
1439
1440                                         // skip whitespace before checking for a priority
1441                                         while (isspace(timecode[0]))
1442                                                 timecode=timecode.substr(1);
1443
1444                                         // If there is a priority, then grab it and remove
1445                                         // it from the timecode
1446                                         if(timecode[0]=='p')
1447                                         {
1448                                                 //priority=timecode[1]-'0';
1449                                                 //timecode=String(timecode.begin()+3,timecode.end());
1450                                                 int space=timecode.find_first_of(' ');
1451                                                 priority=atoi(String(timecode,1,space-1).c_str());
1452                                                 timecode=String(timecode.begin()+space+1,timecode.end());
1453                                                 //synfig::info("priority: %d      timecode: %s",priority,timecode.c_str());
1454                                         }
1455
1456                                         timing_info.push_back(
1457                                                 Activepoint(
1458                                                         Time(
1459                                                                 timecode,
1460                                                                 fps
1461                                                         ),
1462                                                         false,  // Mark as a "off" activepoint
1463                                                         priority
1464                                                 )
1465                                         );
1466                                         if(iter==end_sequence.end())
1467                                                 end_sequence.clear();
1468                                         else
1469                                                 end_sequence=String(iter+1,end_sequence.end());
1470                                 }
1471
1472                                 timing_info.sort();
1473                         }
1474
1475                         if(child->get_attribute("use"))
1476                         {
1477                                 // \todo does this need to be able to read 'use="canvas"', like waypoints can now?  (see 'surefind_canvas' in this file)
1478                                 string id=child->get_attribute("use")->get_value();
1479                                 try
1480                                 {
1481                                         list_entry.value_node=canvas->surefind_value_node(id);
1482                                 }
1483                                 catch(Exception::IDNotFound)
1484                                 {
1485                                         error(child,"\"use\" attribute in <entry> references unknown ID -- "+id);
1486                                         continue;
1487                                 }
1488                         }
1489                         else
1490                         {
1491                                 xmlpp::Element::NodeList list = child->get_children();
1492                                 xmlpp::Element::NodeList::iterator iter;
1493
1494                                 // Search for the first non-text XML element
1495                                 for(iter = list.begin(); iter != list.end(); ++iter)
1496                                         if(dynamic_cast<xmlpp::Element*>(*iter)) break;
1497
1498                                 if(iter==list.end())
1499                                 {
1500                                         error(child,strprintf(_("<entry> is missing its contents or missing \"use\" element")));
1501                                         continue;
1502                                 }
1503
1504                                 list_entry.value_node=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1505
1506                                 if(!list_entry.value_node)
1507                                         error((*iter),"Parse of ValueNode failed");
1508
1509                                 // \todo do a search for more elements and warn if they are found
1510
1511                         }
1512
1513                         value_node->add(list_entry);
1514                         value_node->set_link(value_node->link_count()-1,list_entry.value_node);
1515                 }
1516                 else
1517                         error_unexpected_element(child,child->get_name());
1518         }
1519         return value_node;
1520 }
1521
1522 handle<ValueNode>
1523 CanvasParser::parse_value_node(xmlpp::Element *element,Canvas::Handle canvas)
1524 {
1525         handle<ValueNode> value_node;
1526         assert(element);
1527
1528         GUID guid;
1529
1530         if(element->get_attribute("guid"))
1531         {
1532                 guid=GUID(element->get_attribute("guid")->get_value())^canvas->get_root()->get_guid();
1533                 value_node=guid_cast<ValueNode>(guid);
1534                 if(value_node)
1535                         return value_node;
1536         }
1537
1538         // If ValueBase::ident_type() recognises the name, then we know it's a ValueBase
1539         if(element->get_name()!="canvas" && ValueBase::ident_type(element->get_name()))
1540         {
1541                 ValueBase data=parse_value(element,canvas);
1542
1543                 if(!data.is_valid())
1544                 {
1545                         error(element,strprintf(_("Bad data in <%s>"),element->get_name().c_str()));
1546                         return value_node;
1547                 }
1548
1549                 // We want to convert this ValueBase into a
1550                 // ValueNode_Const. That way, we can treat the
1551                 // ID like any other Datanode. Think of this
1552                 // as a shorthand for creating constant ValueNodes.
1553
1554                 value_node=ValueNode_Const::create(data);
1555         }
1556         else
1557         if(element->get_name()=="hermite" || element->get_name()=="animated")
1558                 value_node=parse_animated(element,canvas);
1559         else
1560         if(element->get_name()=="composite")
1561                 value_node=parse_composite(element,canvas);
1562         else
1563         if(element->get_name()=="dynamic_list")
1564                 value_node=parse_dynamic_list(element,canvas);
1565         else
1566         if(element->get_name()=="bline") // This is not a typo. The dynamic list parser will parse a bline.
1567                 value_node=parse_dynamic_list(element,canvas);
1568         else
1569         if(LinkableValueNode::book().count(element->get_name()))
1570                 value_node=parse_linkable_value_node(element,canvas);
1571         else
1572         if(element->get_name()=="canvas")
1573                 value_node=ValueNode_Const::create(parse_canvas(element,canvas,true));
1574         else
1575         {
1576                 error_unexpected_element(element,element->get_name());
1577                 error(element, "Expected a ValueNode");
1578         }
1579
1580
1581         value_node->set_root_canvas(canvas->get_root());
1582
1583
1584         // If we were successful, and our element has
1585         // an ID attribute, go ahead and add it to the
1586         // value_node list
1587         if(value_node && element->get_attribute("id"))
1588         {
1589                 string id=element->get_attribute("id")->get_value();
1590
1591                 //value_node->set_id(id);
1592
1593                 // If there is already a value_node in the list
1594                 // with the same ID, then that is an error
1595                 try { canvas->add_value_node(value_node,id); }
1596                 catch(Exception::BadLinkName)
1597                 {
1598                         warning(element,strprintf(_("Bad ID \"%s\""),id.c_str()));
1599                         return value_node;
1600                 }
1601                 catch(Exception::IDAlreadyExists)
1602                 {
1603                         error(element,strprintf(_("Duplicate ID \"%s\""),id.c_str()));
1604                         return value_node;
1605                 }
1606                 catch(...)
1607                 {
1608                         error(element,strprintf(_("Unknown Exception thrown when adding ValueNode \"%s\""),id.c_str()));
1609                         throw;
1610                 }
1611         }
1612         value_node->set_guid(guid);
1613         return value_node;
1614 }
1615
1616 void
1617 CanvasParser::parse_canvas_defs(xmlpp::Element *element,Canvas::Handle canvas)
1618 {
1619         assert(element->get_name()=="defs");
1620         xmlpp::Element::NodeList list = element->get_children();
1621         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1622         {
1623                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1624                 if(!child)
1625                         continue;
1626                 else
1627                 if(child->get_name()=="canvas")
1628                         parse_canvas(child, canvas);
1629                 else
1630                         parse_value_node(child,canvas);
1631         }
1632 }
1633
1634 Layer::Handle
1635 CanvasParser::parse_layer(xmlpp::Element *element,Canvas::Handle canvas)
1636 {
1637
1638         assert(element->get_name()=="layer");
1639         Layer::Handle layer;
1640
1641         if(!element->get_attribute("type"))
1642         {
1643                 error(element,_("Missing \"type\" attribute to \"layer\" element"));
1644                 return Layer::Handle();
1645         }
1646
1647         layer=Layer::create(element->get_attribute("type")->get_value());
1648         layer->set_canvas(canvas);
1649
1650         if(element->get_attribute("group"))
1651         {
1652                 layer->add_to_group(
1653                         element->get_attribute("group")->get_value()
1654                 );
1655         }
1656
1657         // Handle the version attribute
1658         if(element->get_attribute("version"))
1659         {
1660                 String version(element->get_attribute("version")->get_value());
1661                 if(version>layer->get_version())
1662                         warning(element,_("Installed layer version is larger than layer version in file"));
1663                 if(version!=layer->get_version())
1664                         layer->set_version(version);
1665         }
1666
1667         // Handle the description
1668         if(element->get_attribute("desc"))
1669                 layer->set_description(element->get_attribute("desc")->get_value());
1670
1671         if(element->get_attribute("active"))
1672                 layer->set_active(element->get_attribute("active")->get_value()=="false"?false:true);
1673
1674         xmlpp::Element::NodeList list = element->get_children();
1675         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1676         {
1677                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1678                 if(!child)
1679                         continue;
1680                 else
1681                 if(child->get_name()=="name")
1682                         warning(child,_("<name> entry for <layer> is not yet supported. Ignoring..."));
1683                 else
1684                 if(child->get_name()=="desc")
1685                         warning(child,_("<desc> entry for <layer> is not yet supported. Ignoring..."));
1686                 else
1687                 if(child->get_name()=="param")
1688                 {
1689                         xmlpp::Element::NodeList list = child->get_children();
1690
1691                         if(!child->get_attribute("name"))
1692                         {
1693                                 error(child,_("Missing \"name\" attribute for <param>."));
1694                                 continue;
1695                         }
1696
1697                         String param_name=child->get_attribute("name")->get_value();
1698
1699                         if(child->get_attribute("use"))
1700                         {
1701                                 // If the "use" attribute is used, then the
1702                                 // element should be empty. Warn the user if
1703                                 // we find otherwise.
1704                                 if(!list.empty())
1705                                         warning(child,_("Found \"use\" attribute for <param>, but it wasn't empty. Ignoring contents..."));
1706
1707                                 String str=     child->get_attribute("use")->get_value();
1708
1709                                 if(layer->get_param(param_name).get_type()==ValueBase::TYPE_CANVAS)
1710                                 {
1711                                         if(!layer->set_param(param_name,canvas->surefind_canvas(str)))
1712                                                 error((*iter),_("Layer rejected canvas link"));
1713                                 }
1714                                 else
1715                                 try
1716                                 {
1717                                         handle<ValueNode> value_node=canvas->surefind_value_node(str);
1718
1719                                         // Assign the value_node to the dynamic parameter list
1720                                         layer->connect_dynamic_param(param_name,value_node);
1721                         }
1722                                 catch(Exception::IDNotFound)
1723                                 {
1724                                         error(child,strprintf(_("Unknown ID (%s) referenced in <param>"),str.c_str()));
1725                                 }
1726
1727                                 continue;
1728                         }
1729
1730                         xmlpp::Element::NodeList::iterator iter;
1731
1732                         // Search for the first non-text XML element
1733                         for(iter = list.begin(); iter != list.end(); ++iter)
1734                                 if(dynamic_cast<xmlpp::Element*>(*iter))
1735                                         break;
1736                                 //if(!(!dynamic_cast<xmlpp::Element*>(*iter) && (*iter)->get_name()=="text"||(*iter)->get_name()=="comment"   )) break;
1737
1738                         if(iter==list.end())
1739                         {
1740                                 error(child,_("<param> is either missing its contents, or missing a \"use\" attribute."));
1741                                 continue;
1742                         }
1743
1744                         // If we recognise the element name as a
1745                         // ValueBase, then treat is at one
1746                         if(/*(*iter)->get_name()!="canvas" && */ValueBase::ident_type((*iter)->get_name()) && !dynamic_cast<xmlpp::Element*>(*iter)->get_attribute("guid"))
1747                         {
1748                                 ValueBase data=parse_value(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1749
1750                                 if(!data.is_valid())
1751                                 {
1752                                         error((*iter),_("Bad data for <param>"));
1753                                         continue;
1754                                 }
1755
1756                                 // Set the layer's parameter, and make sure that
1757                                 // the layer liked it
1758                                 if(!layer->set_param(param_name,data))
1759                                 {
1760                                         warning((*iter),_("Layer rejected value for <param>"));
1761                                         continue;
1762                                 }
1763                         }
1764                         else    // ... otherwise, we assume that it is a ValueNode
1765                         {
1766                                 handle<ValueNode> value_node=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1767
1768                                 if(!value_node)
1769                                 {
1770                                         error((*iter),_("Bad data for <param>"));
1771                                         continue;
1772                                 }
1773
1774                                 // Assign the value_node to the dynamic parameter list
1775                                 layer->connect_dynamic_param(param_name,value_node);
1776                         }
1777
1778                         // Warn if there is trash after the param value
1779                         for(iter++; iter != list.end(); ++iter)
1780                                 if(dynamic_cast<xmlpp::Element*>(*iter))
1781                                         warning((*iter),strprintf(_("Unexpected element <%s> after <param> data, ignoring..."),(*iter)->get_name().c_str()));
1782                         continue;
1783                 }
1784                 else
1785                         error_unexpected_element(child,child->get_name());
1786         }
1787
1788         layer->reset_version();
1789         return layer;
1790 }
1791
1792 Canvas::Handle
1793 CanvasParser::parse_canvas(xmlpp::Element *element,Canvas::Handle parent,bool inline_, String filename)
1794 {
1795
1796         if(element->get_name()!="canvas")
1797         {
1798                 error_unexpected_element(element,element->get_name(),"canvas");
1799                 return Canvas::Handle();
1800         }
1801         Canvas::Handle canvas;
1802
1803
1804
1805         if(parent && (element->get_attribute("id") || inline_))
1806         {
1807                 if(inline_)
1808                 {
1809                         canvas=Canvas::create_inline(parent);
1810                 }
1811                 else
1812                 {
1813                         try
1814                         {
1815                                 canvas=parent->find_canvas(element->get_attribute("id")->get_value());
1816                         }
1817                         catch(...)
1818                         {
1819                                 canvas=parent->new_child_canvas(element->get_attribute("id")->get_value());
1820                         }
1821                 }
1822                 canvas->rend_desc().clear_flags();
1823         }
1824         else
1825         {
1826                 canvas=Canvas::create();
1827                 if(filename=="/dev/stdin")
1828                         canvas->set_file_name("./stdin.sif");
1829                 else
1830                         canvas->set_file_name(filename);
1831                 canvas->rend_desc().clear_flags();
1832         }
1833
1834         if(element->get_attribute("guid"))
1835         {
1836                 GUID guid(element->get_attribute("guid")->get_value());
1837                 if(guid_cast<Canvas>(guid))
1838                         return guid_cast<Canvas>(guid);
1839                 else
1840                         canvas->set_guid(guid);
1841         }
1842
1843         if(element->get_attribute("width"))
1844                 canvas->rend_desc().set_w(atoi(element->get_attribute("width")->get_value().c_str()));
1845
1846         if(element->get_attribute("height"))
1847                 canvas->rend_desc().set_h(atoi(element->get_attribute("height")->get_value().c_str()));
1848
1849         if(element->get_attribute("xres"))
1850                 canvas->rend_desc().set_x_res(atof(element->get_attribute("xres")->get_value().c_str()));
1851
1852         if(element->get_attribute("yres"))
1853                 canvas->rend_desc().set_y_res(atof(element->get_attribute("yres")->get_value().c_str()));
1854
1855
1856         if(element->get_attribute("fps"))
1857                 canvas->rend_desc().set_frame_rate(atof(element->get_attribute("fps")->get_value().c_str()));
1858
1859         if(element->get_attribute("start-time"))
1860                 canvas->rend_desc().set_time_start(Time(element->get_attribute("start-time")->get_value(),canvas->rend_desc().get_frame_rate()));
1861
1862         if(element->get_attribute("begin-time"))
1863                 canvas->rend_desc().set_time_start(Time(element->get_attribute("begin-time")->get_value(),canvas->rend_desc().get_frame_rate()));
1864
1865         if(element->get_attribute("end-time"))
1866                 canvas->rend_desc().set_time_end(Time(element->get_attribute("end-time")->get_value(),canvas->rend_desc().get_frame_rate()));
1867
1868         if(element->get_attribute("antialias"))
1869                 canvas->rend_desc().set_antialias(atoi(element->get_attribute("antialias")->get_value().c_str()));
1870
1871         if(element->get_attribute("view-box"))
1872         {
1873                 string values=element->get_attribute("view-box")->get_value();
1874                 Vector
1875                         tl,
1876                         br;
1877                 tl[0]=atof(string(values.data(),values.find(' ')).c_str());
1878                 values=string(values.begin()+values.find(' ')+1,values.end());
1879                 tl[1]=atof(string(values.data(),values.find(' ')).c_str());
1880                 values=string(values.begin()+values.find(' ')+1,values.end());
1881                 br[0]=atof(string(values.data(),values.find(' ')).c_str());
1882                 values=string(values.begin()+values.find(' ')+1,values.end());
1883                 br[1]=atof(values.c_str());
1884
1885                 canvas->rend_desc().set_tl(tl);
1886                 canvas->rend_desc().set_br(br);
1887         }
1888
1889         if(element->get_attribute("bgcolor"))
1890         {
1891                 string values=element->get_attribute("bgcolor")->get_value();
1892                 Color bg;
1893
1894                 bg.set_r(atof(string(values.data(),values.find(' ')).c_str()));
1895                 values=string(values.begin()+values.find(' ')+1,values.end());
1896
1897                 bg.set_g(atof(string(values.data(),values.find(' ')).c_str()));
1898                 values=string(values.begin()+values.find(' ')+1,values.end());
1899
1900                 bg.set_b(atof(string(values.data(),values.find(' ')).c_str()));
1901                 values=string(values.begin()+values.find(' ')+1,values.end());
1902
1903                 bg.set_a(atof(values.c_str()));
1904
1905                 canvas->rend_desc().set_bg_color(bg);
1906         }
1907
1908         if(element->get_attribute("focus"))
1909         {
1910                 string values=element->get_attribute("focus")->get_value();
1911                 Vector focus;
1912
1913                 focus[0]=atof(string(values.data(),values.find(' ')).c_str());
1914                 values=string(values.begin()+values.find(' ')+1,values.end());
1915                 focus[1]=atof(values.c_str());
1916
1917                 canvas->rend_desc().set_focus(focus);
1918         }
1919
1920         canvas->rend_desc().set_flags(RendDesc::PX_ASPECT|RendDesc::IM_SPAN);
1921
1922         xmlpp::Element::NodeList list = element->get_children();
1923         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1924         {
1925                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1926                 if(child)
1927                 {
1928                         if(child->get_name()=="defs")
1929                         {
1930                                 if(canvas->is_inline())
1931                                         error(child,_("Inline canvas cannot have a <defs> section"));
1932                                 parse_canvas_defs(child, canvas);
1933                         }
1934                         else
1935                         if(child->get_name()=="keyframe")
1936                         {
1937                                 if(canvas->is_inline())
1938                                 {
1939                                         warning(child,_("Inline canvas cannot have keyframes"));
1940                                         continue;
1941                                 }
1942
1943                                 canvas->keyframe_list().add(parse_keyframe(child,canvas));
1944                                 canvas->keyframe_list().sync();
1945                         }
1946                         else
1947                         if(child->get_name()=="meta")
1948                         {
1949                                 if(canvas->is_inline())
1950                                 {
1951                                         warning(child,_("Inline canvases cannot have metadata"));
1952                                         continue;
1953                                 }
1954
1955                                 String name,content;
1956
1957                                 if(!child->get_attribute("name"))
1958                                 {
1959                                         warning(child,_("<meta> must have a name"));
1960                                         continue;
1961                                 }
1962
1963                                 if(!child->get_attribute("content"))
1964                                 {
1965                                         warning(child,_("<meta> must have content"));
1966                                         continue;
1967                                 }
1968
1969                                 canvas->set_meta_data(child->get_attribute("name")->get_value(),child->get_attribute("content")->get_value());
1970                         }
1971                         else if(child->get_name()=="name")
1972                         {
1973                                 xmlpp::Element::NodeList list = child->get_children();
1974
1975                                 // If we don't have any name, warn
1976                                 if(list.empty())
1977                                         warning(child,_("blank \"name\" entitity"));
1978
1979                                 string tmp;
1980                                 for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1981                                         if(dynamic_cast<xmlpp::TextNode*>(*iter))tmp+=dynamic_cast<xmlpp::TextNode*>(*iter)->get_content();
1982                                 canvas->set_name(tmp);
1983                         }
1984                         else
1985                         if(child->get_name()=="desc")
1986                         {
1987
1988                                 xmlpp::Element::NodeList list = child->get_children();
1989
1990                                 // If we don't have any description, warn
1991                                 if(list.empty())
1992                                         warning(child,_("blank \"desc\" entitity"));
1993
1994                                 string tmp;
1995                                 for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1996                                         if(dynamic_cast<xmlpp::TextNode*>(*iter))tmp+=dynamic_cast<xmlpp::TextNode*>(*iter)->get_content();
1997                                 canvas->set_description(tmp);
1998                         }
1999                         else
2000                         if(child->get_name()=="author")
2001                         {
2002
2003                                 xmlpp::Element::NodeList list = child->get_children();
2004
2005                                 // If we don't have any description, warn
2006                                 if(list.empty())
2007                                         warning(child,_("blank \"author\" entitity"));
2008
2009                                 string tmp;
2010                                 for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
2011                                         if(dynamic_cast<xmlpp::TextNode*>(*iter))tmp+=dynamic_cast<xmlpp::TextNode*>(*iter)->get_content();
2012                                 canvas->set_author(tmp);
2013                         }
2014                         else
2015                         if(child->get_name()=="layer")
2016                         {
2017                                 //if(canvas->is_inline())
2018                                 //      canvas->push_front(parse_layer(child,canvas->parent()));
2019                                 //else
2020                                         canvas->push_front(parse_layer(child,canvas));
2021                         }
2022                         else
2023                                 error_unexpected_element(child,child->get_name());
2024                 }
2025 //              else
2026 //              if((child->get_name()=="text"||child->get_name()=="comment") && child->has_child_text())
2027 //                      continue;
2028         }
2029
2030         if(canvas->value_node_list().placeholder_count())
2031         {
2032                 error(element,strprintf(_("Canvas %s has undefined ValueNodes"),canvas->get_id().c_str()));
2033         }
2034
2035         return canvas;
2036 }
2037
2038 Canvas::Handle
2039 CanvasParser::parse_from_file(const String &file)
2040 {
2041         return parse_from_file_as(file,file);
2042 }
2043
2044 Canvas::Handle
2045 CanvasParser::parse_from_file_as(const String &file_,const String &as_)
2046 {
2047         CHECK_EXPIRE_TIME();
2048         try
2049         {
2050         ChangeLocale change_locale(LC_NUMERIC, "C");
2051                 String file(unix_to_local_path(file_));
2052                 String as(unix_to_local_path(as_));
2053
2054                 if(get_open_canvas_map().count(etl::absolute_path(as)))
2055                         return get_open_canvas_map()[etl::absolute_path(as)];
2056
2057                 filename=as;
2058                 total_warnings_=0;
2059                 xmlpp::DomParser parser(file);
2060                 if(parser)
2061                 {
2062                         Canvas::Handle canvas(parse_canvas(parser.get_document()->get_root_node(),0,false,as));
2063                         get_open_canvas_map()[etl::absolute_path(as)]=canvas;
2064                         canvas->signal_deleted().connect(sigc::bind(sigc::ptr_fun(_remove_from_open_canvas_map),canvas.get()));
2065                         canvas->signal_file_name_changed().connect(sigc::bind(sigc::ptr_fun(_canvas_file_name_changed),canvas.get()));
2066
2067
2068
2069                         const ValueNodeList& value_node_list(canvas->value_node_list());
2070
2071                         again:
2072                         ValueNodeList::const_iterator iter;
2073                         for(iter=value_node_list.begin();iter!=value_node_list.end();++iter)
2074                         {
2075                                 ValueNode::Handle value_node(*iter);
2076                                 if(value_node->is_exported() && value_node->get_id().find("Unnamed")==0)
2077                                 {
2078                                         canvas->remove_value_node(value_node);
2079                                         goto again;
2080                                 }
2081                         }
2082
2083                         return canvas;
2084                 }
2085         }
2086         catch(Exception::BadLinkName) { synfig::error("BadLinkName Thrown"); }
2087         catch(Exception::BadType) { synfig::error("BadType Thrown"); }
2088         catch(Exception::FileNotFound) { synfig::error("FileNotFound Thrown"); }
2089         catch(Exception::IDNotFound) { synfig::error("IDNotFound Thrown"); }
2090         catch(Exception::IDAlreadyExists) { synfig::error("IDAlreadyExists Thrown"); }
2091         catch(const std::exception& ex)
2092         {
2093                 synfig::error("Standard Exception: "+String(ex.what()));
2094                 return Canvas::Handle();
2095         }
2096         catch(const String& str)
2097         {
2098                 cerr<<str<<endl;
2099                 //      synfig::error(str);
2100                 return Canvas::Handle();
2101         }
2102         return Canvas::Handle();
2103 }
2104
2105 Canvas::Handle
2106 CanvasParser::parse_from_string(const String &data)
2107 {
2108         CHECK_EXPIRE_TIME();
2109
2110         try
2111         {
2112         ChangeLocale change_locale(LC_NUMERIC, "C");
2113                 filename=_("<INTERNAL>");
2114                 total_warnings_=0;
2115                 xmlpp::DomParser parser;
2116                 parser.parse_memory(data);
2117                 xmlpp::Element *root=parser.get_document()->get_root_node();
2118                 if(parser)
2119                 {
2120                         Canvas::Handle canvas(parse_canvas(root));
2121                         canvas->signal_deleted().connect(sigc::bind(sigc::ptr_fun(_remove_from_open_canvas_map),canvas.get()));
2122                         canvas->signal_file_name_changed().connect(sigc::bind(sigc::ptr_fun(_canvas_file_name_changed),canvas.get()));
2123
2124                         const ValueNodeList& value_node_list(canvas->value_node_list());
2125                         again:
2126                         ValueNodeList::const_iterator iter;
2127                         for(iter=value_node_list.begin();iter!=value_node_list.end();++iter)
2128                         {
2129                                 ValueNode::Handle value_node(*iter);
2130                                 if(value_node->is_exported() && value_node->get_id().find("Unnamed")==0)
2131                                 {
2132                                         canvas->remove_value_node(value_node);
2133                                         goto again;
2134                                 }
2135                         }
2136
2137                         return canvas;
2138                 }
2139         }
2140         catch(Exception::BadLinkName) { synfig::error("BadLinkName Thrown"); }
2141         catch(Exception::BadType) { synfig::error("BadType Thrown"); }
2142         catch(Exception::FileNotFound) { synfig::error("FileNotFound Thrown"); }
2143         catch(Exception::IDNotFound) { synfig::error("IDNotFound Thrown"); }
2144         catch(Exception::IDAlreadyExists) { synfig::error("IDAlreadyExists Thrown"); }
2145         catch(const std::exception& ex)
2146         {
2147                 synfig::error("Standard Exception: "+String(ex.what()));
2148                 return Canvas::Handle();
2149         }
2150         catch(const String& str)
2151         {
2152                 cerr<<str<<endl;
2153                 //      synfig::error(str);
2154                 return Canvas::Handle();
2155         }
2156         return Canvas::Handle();
2157 }