synfig-core/tags/synfig_0_61_06/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,Canvas::Handle canvas)
 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,Canvas::Handle canvas)
 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,Canvas::Handle canvas)
 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,Canvas::Handle canvas)
 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;
 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,Canvas::Handle canvas)
 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,Canvas::Handle canvas)
 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,Canvas::Handle canvas)
 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,canvas);
 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,Canvas::Handle canvas)
 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),canvas);
 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),canvas);
 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),canvas);
 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),canvas);
 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,Canvas::Handle canvas)
 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),canvas));
 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),canvas));
 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),canvas));
 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),canvas));
 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),canvas));
 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,Canvas::Handle canvas)
 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,canvas);
 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,canvas);
 809         else
 810         if(element->get_name()=="string")
 811                 return parse_string(element,canvas);
 812         else
 813         if(element->get_name()=="vector")
 814         {
 815                 return parse_vector(element,canvas);
 816         }
 817         else
 818         if(element->get_name()=="color")
 819                 return parse_color(element,canvas);
 820         else
 821         if(element->get_name()=="segment")
 822                 return parse_segment(element,canvas);
 823         else
 824         if(element->get_name()=="list")
 825                 return parse_list(element,canvas);
 826         else
 827         if(element->get_name()=="gradient")
 828                 return parse_gradient(element,canvas);
 829         else
 830         if(element->get_name()=="bool")
 831                 return parse_bool(element,canvas);
 832         else
 833         //if(element->get_name()=="canvas")
 834         //      return parse_canvas(element,canvas,true);       // inline canvas
 835         //else
 836         if(element->get_name()=="angle" || element->get_name()=="degrees" || element->get_name()=="radians" || element->get_name()=="rotations")
 837                 return parse_angle(element,canvas);
 838         else
 839         if(element->get_name()=="bline_point")
 840                 return parse_bline_point(element,canvas);
 841         else
 842         if(element->get_name()=="canvas")
 843                 return ValueBase(parse_canvas(element,canvas,true));
 844         else
 845         {
 846                 DEBUGPOINT();
 847                 error_unexpected_element(element,element->get_name());
 848         }
 849
 850         return ValueBase();
 851 }
 852
 853
 854
 855
 856 ValueNode_Animated::Handle
 857 CanvasParser::parse_animated(xmlpp::Element *element,Canvas::Handle canvas)
 858 {
 859         assert(element->get_name()=="hermite" || element->get_name()=="animated");
 860
 861         if(!element->get_attribute("type"))
 862         {
 863                 error(element,"Missing attribute \"type\" in <animated>");
 864                 return ValueNode_Animated::Handle();
 865         }
 866
 867         ValueBase::Type type=ValueBase::ident_type(element->get_attribute("type")->get_value());
 868
 869         if(!type)
 870         {
 871                 error(element,"Bad type in <animated>");
 872                 return ValueNode_Animated::Handle();
 873         }
 874
 875         ValueNode_Animated::Handle value_node=ValueNode_Animated::create(type);
 876
 877         if(!value_node)
 878         {
 879                 error(element,strprintf(_("Unable to create <animated> with type \"%s\""),ValueBase::type_name(type).c_str()));
 880                 return ValueNode_Animated::Handle();
 881         }
 882
 883         value_node->set_root_canvas(canvas->get_root());
 884
 885         xmlpp::Element::NodeList list = element->get_children();
 886         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 887         {
 888                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 889                 if(!child)
 890                         continue;
 891                 else
 892                 if(child->get_name()=="waypoint")
 893                 {
 894                         if(!child->get_attribute("time"))
 895                         {
 896                                 error(child,_("<waypoint> is missing attribute \"time\""));
 897                                 continue;
 898                         }
 899
 900                         Time time(child->get_attribute("time")->get_value(),canvas->rend_desc().get_frame_rate());
 901
 902
 903                         ValueNode::Handle waypoint_value_node;
 904
 905                         if(child->get_attribute("use"))
 906                         {
 907                                 waypoint_value_node=canvas->surefind_value_node(child->get_attribute("use")->get_value());
 908                         }
 909                         else
 910                         {
 911                                 if(child->get_children().empty())
 912                                 {
 913                                         error(child, strprintf(_("<%s> is missing its data"),"waypoint"));
 914                                         continue;
 915                                 }
 916
 917                                 xmlpp::Element::NodeList list = child->get_children();
 918                                 xmlpp::Element::NodeList::iterator iter;
 919
 920                                 // Search for the first non-text XML element
 921                                 for(iter = list.begin(); iter != list.end(); ++iter)
 922                                         if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 923
 924                                 if(iter==list.end())
 925                                 {
 926                                         error(child, strprintf(_("<%s> is missing its data"),"waypoint"));
 927                                         continue;
 928                                 }
 929
 930                                 waypoint_value_node=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
 931
 932                                 /*
 933                                 ValueBase data=parse_value(dynamic_cast<xmlpp::Element*>(*iter),canvas);
 934
 935                                 if(!data.is_valid())
 936                                 {
 937                                         error(child,_("Bad data for <waypoint>"));
 938                                         continue;
 939                                 }
 940                                 */
 941                                 if(!waypoint_value_node)
 942                                 {
 943                                         error(child,_("Bad data for <waypoint>"));
 944                                         continue;
 945                                 }
 946
 947                                 /*! HACK -- This is a temporary fix to help repair some
 948                                 **      weirdness that is currently going on (10-21-2004).
 949                                 **      This short circuits the linking of waypoints,
 950                                 **      a feature which is so obscure that we can get
 951                                 **      away with something like this pretty easily.
 952                                 */
 953                                 waypoint_value_node=waypoint_value_node->clone();
 954
 955                                 // Warn if there is trash after the param value
 956                                 for(iter++; iter != list.end(); ++iter)
 957                                         if(dynamic_cast<xmlpp::Element*>(*iter))
 958                                                 warning((*iter),strprintf(_("Unexpected element <%s> after <waypoint> data, ignoring..."),(*iter)->get_name().c_str()));
 959                         }
 960
 961
 962                         try {
 963                                 ValueNode_Animated::WaypointList::iterator waypoint=value_node->new_waypoint(time,waypoint_value_node);
 964
 965                         if(child->get_attribute("tension"))
 966                         {
 967                                 synfig::String str(child->get_attribute("tension")->get_value());
 968                                 waypoint->set_tension(atof(str.c_str()));
 969                         }
 970                         if(child->get_attribute("temporal-tension"))
 971                         {
 972                                 synfig::String str(child->get_attribute("temporal-tension")->get_value());
 973                                 waypoint->set_time_tension(atof(str.c_str()));
 974                         }
 975                         if(child->get_attribute("continuity"))
 976                         {
 977                                 synfig::String str(child->get_attribute("continuity")->get_value());
 978                                 waypoint->set_continuity(atof(str.c_str()));
 979                         }
 980                         if(child->get_attribute("bias"))
 981                         {
 982                                 synfig::String str(child->get_attribute("bias")->get_value());
 983                                 waypoint->set_bias(atof(str.c_str()));
 984                         }
 985
 986                         if(child->get_attribute("before"))
 987                         {
 988                                 string val=child->get_attribute("before")->get_value();
 989                                 if(val=="halt")
 990                                         waypoint->set_before(INTERPOLATION_HALT);
 991                                 else if(val=="constant")
 992                                         waypoint->set_before(INTERPOLATION_CONSTANT);
 993                                 else if(val=="linear")
 994                                         waypoint->set_before(INTERPOLATION_LINEAR);
 995                                 else if(val=="manual")
 996                                         waypoint->set_before(INTERPOLATION_MANUAL);
 997                                 else if(val=="auto")
 998                                         waypoint->set_before(INTERPOLATION_TCB);
 999                                 else
1000                                         error(child,strprintf(_("\"%s\" not a valid value for attribute \"%s\" in <%s>"),val.c_str(),"before","waypoint"));
1001                         }
1002
1003                         if(child->get_attribute("after"))
1004                         {
1005                                 string val=child->get_attribute("after")->get_value();
1006                                 if(val=="halt")
1007                                         waypoint->set_after(INTERPOLATION_HALT);
1008                                 else if(val=="constant")
1009                                         waypoint->set_after(INTERPOLATION_CONSTANT);
1010                                 else if(val=="linear")
1011                                         waypoint->set_after(INTERPOLATION_LINEAR);
1012                                 else if(val=="manual")
1013                                         waypoint->set_after(INTERPOLATION_MANUAL);
1014                                 else if(val=="auto")
1015                                         waypoint->set_after(INTERPOLATION_TCB);
1016                                 else
1017                                         error(child,strprintf(_("\"%s\" not a valid value for attribute \"%s\" in <%s>"),val.c_str(),"before","waypoint"));
1018                         }
1019                         }
1020                         catch(Exception::BadTime x)
1021                         {
1022                                 warning(child,x.what());
1023                         }
1024                         continue;
1025
1026                 }
1027                 else
1028                         error_unexpected_element(child,child->get_name());
1029         }
1030         value_node->changed();
1031         return value_node;
1032 }
1033
1034 // This function is a phase-out hack for the timed swap value node
1035 etl::handle<ValueNode_Animated>
1036 CanvasParser::parse_timedswap(xmlpp::Element *node,Canvas::Handle canvas)
1037 {
1038         ValueNode_TimedSwap::Handle timed_swap(parse_linkable_value_node(node,canvas));
1039
1040         assert(timed_swap);
1041
1042         ValueNode_Animated::Handle animated(ValueNode_Animated::create(timed_swap->get_type()));
1043
1044         animated->set_root_canvas(canvas->get_root());
1045
1046         assert(animated);
1047
1048         Time swap_time, swap_length;
1049         (*timed_swap->get_swap_time())(0).put(&swap_time);
1050         (*timed_swap->get_swap_length())(0).put(&swap_length);
1051
1052         animated->new_waypoint(swap_time-swap_length,timed_swap->get_before());
1053         animated->new_waypoint(swap_time,timed_swap->get_after());
1054
1055         return animated;
1056 }
1057
1058
1059 handle<ValueNode_Subtract>
1060 CanvasParser::parse_subtract(xmlpp::Element *element,Canvas::Handle canvas)
1061 {
1062         assert(element->get_name()=="subtract");
1063
1064         handle<ValueNode_Subtract> value_node;
1065         handle<ValueNode> lhs,rhs,scalar;
1066
1067         if(element->get_attribute("type"))
1068         {
1069                 ValueBase::Type type=ValueBase::ident_type(element->get_attribute("type")->get_value());
1070
1071                 if(!type)
1072                 {
1073                         error(element,"Bad type in <subtract>");
1074                         return ValueNode_Subtract::Handle();
1075                 }
1076                 value_node=ValueNode_Subtract::create(type);
1077         }
1078         else
1079                 value_node=ValueNode_Subtract::create();
1080
1081         if(!value_node)
1082         {
1083                 error(element,strprintf(_("Unable to create <subtract>")));
1084                 return handle<ValueNode_Subtract>();
1085         }
1086
1087         //if(element->get_attribute("scalar"))
1088         //{
1089         //      value_node->set_scalar(atof(element->get_attribute("scalar")->get_value().c_str()));
1090         //}
1091
1092         try
1093         {
1094                 if(element->get_attribute("scalar"))
1095                 {
1096                         // This is for compatibility with older versions of the file format
1097                         String value(element->get_attribute("scalar")->get_value());
1098                         if((value[0]<='9' && value[0]>='0')      || value[0]=='-')
1099                         {
1100                                 warning(element, _("Use of a real value where the ID should be is deprecated"));
1101                                 value_node->set_scalar(atof(value.c_str()));
1102                         }
1103                         else
1104                                 value_node->set_scalar(canvas->surefind_value_node(value));
1105                         scalar=value_node->get_scalar();
1106                 }
1107
1108                 if(element->get_attribute("lhs"))
1109                 {
1110                         lhs=canvas->surefind_value_node(element->get_attribute("lhs")->get_value());
1111                         value_node->set_lhs(lhs);
1112                 }
1113
1114                 if(element->get_attribute("rhs"))
1115                 {
1116                         rhs=canvas->surefind_value_node(element->get_attribute("rhs")->get_value());
1117                         value_node->set_rhs(rhs);
1118                 }
1119         }
1120         catch (Exception::IDNotFound)
1121         {
1122                 error(element,"attribute in <subtract> references unknown ID");
1123         }
1124         catch (Exception::FileNotFound)
1125         {
1126                 error(element,"Unable to open external file referenced in ID");
1127         }
1128
1129         xmlpp::Element::NodeList list = element->get_children();
1130         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1131         {
1132                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1133                 if(!child)
1134                         continue;
1135                 else
1136                 if(child->get_name()=="lhs")
1137                 {
1138                         if(lhs)
1139                         {
1140                                 error(child,"LHS component of <subtract> already defined!");
1141                                 continue;
1142                         }
1143
1144                         xmlpp::Element::NodeList list = child->get_children();
1145                         xmlpp::Element::NodeList::iterator iter;
1146
1147                         // Search for the first non-text XML element
1148                         for(iter = list.begin(); iter != list.end(); ++iter)
1149                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
1150
1151                         if(iter==list.end())
1152                         {
1153                                 error(child,_("<lhs> is missing its contents"));
1154                                 continue;
1155                         }
1156
1157                         lhs=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1158
1159                         if(lhs)
1160                                 value_node->set_lhs(lhs);
1161                         else
1162                         {
1163                                 error((*iter),"Parse of LHS ValueNode failed");
1164                         }
1165
1166                         // \todo do a search for more elements and warn if they are found
1167                 }
1168                 else
1169                 if(child->get_name()=="rhs")
1170                 {
1171                         if(rhs)
1172                         {
1173                                 error(child,"RHS component of <subtract> already defined!");
1174                                 continue;
1175                         }
1176
1177                         xmlpp::Element::NodeList list = child->get_children();
1178                         xmlpp::Element::NodeList::iterator iter;
1179
1180                         // Search for the first non-text XML element
1181                         for(iter = list.begin(); iter != list.end(); ++iter)
1182                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
1183
1184                         if(iter==list.end())
1185                         {
1186                                 error(child,_("<rhs> is missing its contents"));
1187                                 continue;
1188                         }
1189
1190                         rhs=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1191
1192                         if(rhs)
1193                                 value_node->set_rhs(rhs);
1194                         else
1195                         {
1196                                 error((*iter),"Parse of RHS ValueNode failed");
1197                         }
1198
1199                         // \todo do a search for more elements and warn if they are found
1200                 }
1201                 else
1202                 if(child->get_name()=="scalar")
1203                 {
1204                         if(scalar)
1205                         {
1206                                 error(child,"scalar component of <subtract> already defined!");
1207                                 continue;
1208                         }
1209
1210                         xmlpp::Element::NodeList list = child->get_children();
1211                         xmlpp::Element::NodeList::iterator iter;
1212
1213                         // Search for the first non-text XML element
1214                         for(iter = list.begin(); iter != list.end(); ++iter)
1215                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
1216
1217                         if(iter==list.end())
1218                         {
1219                                 error(child,_("<scalar> is missing its contents"));
1220                                 continue;
1221                         }
1222
1223                         scalar=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1224
1225                         if(scalar)
1226                                 value_node->set_scalar(scalar);
1227                         else
1228                         {
1229                                 error((*iter),"Parse of scalar ValueNode failed");
1230                         }
1231
1232                         // \todo do a search for more elements and warn if they are found
1233                 }
1234                 else
1235                         error_unexpected_element(child,child->get_name());
1236         }
1237
1238         if(!value_node->get_rhs() || !value_node->get_lhs() || !value_node->get_scalar())
1239                 error(element,"<subtract> is missing LHS, RHS, or SCALAR");
1240
1241         if(value_node->get_rhs() == value_node->get_lhs())
1242                 warning(element,"LHS is equal to RHS in <subtract>, so this value_node will always be zero!");
1243
1244         return value_node;
1245 }
1246
1247 etl::handle<LinkableValueNode>
1248 CanvasParser::parse_linkable_value_node(xmlpp::Element *element,Canvas::Handle canvas)
1249 {
1250         handle<LinkableValueNode> value_node;
1251         ValueBase::Type type;
1252
1253         // Determine the type
1254         if(element->get_attribute("type"))
1255         {
1256                 type=ValueBase::ident_type(element->get_attribute("type")->get_value());
1257
1258                 if(!type)
1259                 {
1260                         error(element,"Bad type in ValueNode");
1261                         return 0;
1262                 }
1263         }
1264         else
1265         {
1266                 error(element,"Missing type in ValueNode");
1267                 return 0;
1268         }
1269
1270         value_node=LinkableValueNode::create(element->get_name(),type);
1271
1272         if(!value_node)
1273         {
1274                 error(element,"Unknown ValueNode type "+element->get_name());
1275                 return 0;
1276         }
1277
1278         if(value_node->get_type()!=type)
1279         {
1280                 error(element,"ValueNode did not accept type");
1281                 return 0;
1282         }
1283
1284         value_node->set_root_canvas(canvas->get_root());
1285
1286         int i;
1287         for(i=0;i<value_node->link_count();i++)
1288         {
1289                 if(element->get_attribute(value_node->link_name(i)))
1290                 try {
1291                         String id(element->get_attribute(value_node->link_name(i))->get_value());
1292
1293                         if(!value_node->set_link(i,
1294                                         canvas->surefind_value_node(
1295                                                 id
1296                                         )
1297                                 )
1298                         ) 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()));
1299                 }
1300                 catch(Exception::IDNotFound)
1301                 {
1302                         error(element,"Unable to resolve "+element->get_attribute(value_node->link_name(i))->get_value());
1303                 }
1304                 catch(Exception::FileNotFound)
1305                 {
1306                         error(element,"Unable to open file referenced in "+element->get_attribute(value_node->link_name(i))->get_value());
1307                 }
1308                 catch(...)
1309                 {
1310                         error(element,strprintf(_("Unknown Exception thrown when referencing ValueNode \"%s\""),
1311                                 element->get_attribute(value_node->link_name(i))->get_value().c_str()));
1312                         throw;
1313                 }
1314         }
1315
1316
1317
1318         xmlpp::Element::NodeList list = element->get_children();
1319         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1320         {
1321                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1322                 try
1323                 {
1324                         if(!child)
1325                                 continue;
1326                         int index=value_node->get_link_index_from_name(child->get_name());
1327
1328                         xmlpp::Element::NodeList list = child->get_children();
1329                         xmlpp::Element::NodeList::iterator iter;
1330
1331                         // Search for the first non-text XML element
1332                         for(iter = list.begin(); iter != list.end(); ++iter)
1333                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
1334
1335                         if(iter==list.end())
1336                         {
1337                                 error(child,_("element is missing its contents"));
1338                                 continue;
1339                         }
1340
1341                         ValueNode::Handle link=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1342
1343                         if(!link)
1344                         {
1345                                 error((*iter),"Parse of ValueNode failed");
1346                         }
1347                         else
1348                         if(!value_node->set_link(index,link))
1349                         {
1350                                 //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));
1351                                 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));
1352                         }
1353
1354                         // \todo do a search for more elements and warn if they are found
1355
1356                 }
1357                 catch(Exception::BadLinkName)
1358                 {
1359                         error_unexpected_element(child,child->get_name());
1360                 }
1361                 catch(...)
1362                 {
1363                         error(child,strprintf(_("Unknown Exception thrown when working on element \"%s\""),child->get_name().c_str()));
1364                         throw;
1365                 }
1366         }
1367
1368         return value_node;
1369 }
1370
1371 handle<ValueNode_Composite>
1372 CanvasParser::parse_composite(xmlpp::Element *element,Canvas::Handle canvas)
1373 {
1374         assert(element->get_name()=="composite");
1375
1376         if(!element->get_attribute("type"))
1377         {
1378                 error(element,"Missing attribute \"type\" in <composite>");
1379                 return handle<ValueNode_Composite>();
1380         }
1381
1382         ValueBase::Type type=ValueBase::ident_type(element->get_attribute("type")->get_value());
1383
1384         if(!type)
1385         {
1386                 error(element,"Bad type in <composite>");
1387                 return handle<ValueNode_Composite>();
1388         }
1389
1390         handle<ValueNode_Composite> value_node=ValueNode_Composite::create(type);
1391         handle<ValueNode> c[6];
1392
1393         if(!value_node)
1394         {
1395                 error(element,strprintf(_("Unable to create <composite>")));
1396                 return handle<ValueNode_Composite>();
1397         }
1398
1399         int i;
1400
1401         for(i=0;i<value_node->link_count();i++)
1402         {
1403                 string name=strprintf("c%d",i+1);
1404                 if(c[i])
1405                 {
1406                         error(element,name+" was already defined in <composite>");
1407                         continue;
1408                 }
1409                 if(element->get_attribute(name))
1410                 {
1411                         c[i]=canvas->surefind_value_node(element->get_attribute(name)->get_value());
1412                         if(c[i])
1413                         {
1414                                 if(!value_node->set_link(i,c[i]))
1415                                 {
1416                                         error(element,'"'+name+"\" attribute in <composite> has bad type");
1417                                 }
1418                         }
1419                         else
1420                                 error(element,'"'+name+"\" attribute in <composite> references unknown ID");
1421                 }
1422         }
1423
1424         xmlpp::Element::NodeList list = element->get_children();
1425         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1426         {
1427                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1428                 if(!child)
1429                         continue;
1430                 else
1431                 for(i=0;i<value_node->link_count();i++)
1432                 {
1433                         string name=strprintf("c%d",i+1);
1434                         if(child->get_name()==name)
1435                         {
1436                                 if(c[i])
1437                                 {
1438                                         error(child,name+" was already defined in <composite>");
1439                                         break;
1440                                 }
1441
1442                                 xmlpp::Element::NodeList list = child->get_children();
1443                                 xmlpp::Element::NodeList::iterator iter;
1444
1445                                 // Search for the first non-text XML element
1446                                 for(iter = list.begin(); iter != list.end(); ++iter)
1447                                         if(dynamic_cast<xmlpp::Element*>(*iter)) break;
1448
1449                                 if(iter==list.end())
1450                                 {
1451                                         error(child,strprintf(_("<%s> is missing its contents"),name.c_str()));
1452                                         break;
1453                                 }
1454
1455                                 c[i]=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1456
1457                                 if(!c[i])
1458                                 {
1459                                         error((*iter),"Parse of "+name+" ValueNode failed");
1460                                         break;
1461                                 }
1462
1463                                 if(!value_node->set_link(i,c[i]))
1464                                 {
1465                                         error(child,strprintf(_("<%s> has a bad value"),name.c_str()));
1466                                         break;
1467                                 }
1468
1469                                 // \todo do a search for more elements and warn if they are found
1470                                 break;
1471                         }
1472                 }
1473                 // somewhat of a hack, but it works
1474                 if(i==value_node->link_count()) error_unexpected_element(child,child->get_name());
1475         }
1476
1477         switch(value_node->link_count())
1478         {
1479         case 1:
1480                 if(!value_node->get_link(0))
1481                 {
1482                         error(element,"<composite> is missing parameters");
1483                         return handle<ValueNode_Composite>();
1484                 }
1485                 break;
1486         case 2:
1487                 if(!value_node->get_link(0) ||!value_node->get_link(1))
1488                 {
1489                         error(element,"<composite> is missing parameters");
1490                         return handle<ValueNode_Composite>();
1491                 }
1492                 break;
1493         case 3:
1494                 if(!value_node->get_link(0) ||!value_node->get_link(1) ||!value_node->get_link(2))
1495                 {
1496                         error(element,"<composite> is missing parameters");
1497                         return handle<ValueNode_Composite>();
1498                 }
1499                 break;
1500         case 4:
1501                 if(!value_node->get_link(0) ||!value_node->get_link(1) ||!value_node->get_link(2) ||!value_node->get_link(3))
1502                 {
1503                         error(element,"<composite> is missing parameters");
1504                         return handle<ValueNode_Composite>();
1505                 }
1506                 break;
1507     }
1508         return value_node;
1509 }
1510
1511 // This will also parse a bline
1512 handle<ValueNode_DynamicList>
1513 CanvasParser::parse_dynamic_list(xmlpp::Element *element,Canvas::Handle canvas)
1514 {
1515         assert(element->get_name()=="dynamic_list" || element->get_name()=="bline");
1516
1517         const float fps(canvas?canvas->rend_desc().get_frame_rate():0);
1518
1519         if(!element->get_attribute("type"))
1520         {
1521                 error(element,"Missing attribute \"type\" in <dynamic_list>");
1522                 return handle<ValueNode_DynamicList>();
1523         }
1524
1525         ValueBase::Type type=ValueBase::ident_type(element->get_attribute("type")->get_value());
1526
1527         if(!type)
1528         {
1529                 error(element,"Bad type in <dynamic_list>");
1530                 return handle<ValueNode_DynamicList>();
1531         }
1532
1533         handle<ValueNode_DynamicList> value_node;
1534         handle<ValueNode_BLine> bline_value_node;
1535
1536         if(element->get_name()=="bline")
1537         {
1538                 value_node=bline_value_node=ValueNode_BLine::create();
1539                 if(element->get_attribute("loop"))
1540                 {
1541                         String loop=element->get_attribute("loop")->get_value();
1542                         if(loop=="true" || loop=="1" || loop=="TRUE" || loop=="True")
1543                                 bline_value_node->set_loop(true);
1544                         else
1545                                 bline_value_node->set_loop(false);
1546                 }
1547
1548         }
1549         else
1550                 value_node=ValueNode_DynamicList::create(type);
1551
1552         if(!value_node)
1553         {
1554                 error(element,strprintf(_("Unable to create <dynamic_list>")));
1555                 return handle<ValueNode_DynamicList>();
1556         }
1557
1558         value_node->set_root_canvas(canvas->get_root());
1559
1560         xmlpp::Element::NodeList list = element->get_children();
1561         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1562         {
1563                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1564                 if(!child)
1565                         continue;
1566                 else
1567                 if(child->get_name()=="entry")
1568                 {
1569                         ValueNode_DynamicList::ListEntry list_entry;
1570
1571                         // Parse begin/end waypoints
1572                         {
1573                                 typedef synfig::ValueNode_DynamicList::ListEntry::Activepoint Activepoint;
1574                                 typedef synfig::ValueNode_DynamicList::ListEntry::ActivepointList ActivepointList;
1575
1576                                 String begin_sequence;
1577                                 String end_sequence;
1578
1579                                 ActivepointList &timing_info(list_entry.timing_info);
1580
1581                                 if(child->get_attribute("begin"))
1582                                         begin_sequence=child->get_attribute("begin")->get_value();
1583
1584                                 if(child->get_attribute("on"))
1585                                         begin_sequence=child->get_attribute("on")->get_value();
1586
1587                                 if(child->get_attribute("end"))
1588                                         end_sequence=child->get_attribute("end")->get_value();
1589
1590                                 if(child->get_attribute("off"))
1591                                         end_sequence=child->get_attribute("off")->get_value();
1592
1593                                 // clear out any auto-start
1594                                 if(!begin_sequence.empty())
1595                                         timing_info.clear();
1596
1597                                 //! \optimize
1598                                 while(!begin_sequence.empty())
1599                                 {
1600                                         String::iterator iter(find(begin_sequence.begin(),begin_sequence.end(),','));
1601                                         String timecode(begin_sequence.begin(), iter);
1602                                         int priority=0;
1603
1604                                         // skip whitespace before checking for a priority
1605                                         while (isspace(timecode[0]))
1606                                                 timecode=timecode.substr(1);
1607
1608                                         // If there is a priority, then grab it and remove
1609                                         // it from the timecode
1610                                         if(timecode[0]=='p')
1611                                         {
1612                                                 //priority=timecode[1]-'0';
1613                                                 //timecode=String(timecode.begin()+3,timecode.end());
1614                                                 int space=timecode.find_first_of(' ');
1615                                                 priority=atoi(String(timecode,1,space-1).c_str());
1616                                                 timecode=String(timecode.begin()+space+1,timecode.end());
1617                                                 //synfig::info("priority: %d      timecode: %s",priority,timecode.c_str());
1618                                         }
1619
1620                                         timing_info.push_back(
1621                                                 Activepoint(
1622                                                         Time(
1623                                                                 timecode,
1624                                                                 fps
1625                                                         ),
1626                                                         true,   // Mark as a "on" activepoint
1627                                                         priority
1628                                                 )
1629                                         );
1630
1631                                         if(iter==begin_sequence.end())
1632                                                 begin_sequence.clear();
1633                                         else
1634                                                 begin_sequence=String(iter+1,begin_sequence.end());
1635                                 }
1636
1637                                 //! \optimize
1638                                 while(!end_sequence.empty())
1639                                 {
1640                                         String::iterator iter(find(end_sequence.begin(),end_sequence.end(),','));
1641                                         String timecode(end_sequence.begin(),   iter);
1642                                         int priority=0;
1643
1644                                         // skip whitespace before checking for a priority
1645                                         while (isspace(timecode[0]))
1646                                                 timecode=timecode.substr(1);
1647
1648                                         // If there is a priority, then grab it and remove
1649                                         // it from the timecode
1650                                         if(timecode[0]=='p')
1651                                         {
1652                                                 //priority=timecode[1]-'0';
1653                                                 //timecode=String(timecode.begin()+3,timecode.end());
1654                                                 int space=timecode.find_first_of(' ');
1655                                                 priority=atoi(String(timecode,1,space-1).c_str());
1656                                                 timecode=String(timecode.begin()+space+1,timecode.end());
1657                                                 //synfig::info("priority: %d      timecode: %s",priority,timecode.c_str());
1658                                         }
1659
1660                                         timing_info.push_back(
1661                                                 Activepoint(
1662                                                         Time(
1663                                                                 timecode,
1664                                                                 fps
1665                                                         ),
1666                                                         false,  // Mark as a "off" activepoint
1667                                                         priority
1668                                                 )
1669                                         );
1670                                         if(iter==end_sequence.end())
1671                                                 end_sequence.clear();
1672                                         else
1673                                                 end_sequence=String(iter+1,end_sequence.end());
1674                                 }
1675
1676                                 timing_info.sort();
1677                         }
1678
1679                         if(child->get_attribute("use"))
1680                         {
1681                                 string id=child->get_attribute("use")->get_value();
1682                                 try
1683                                 {
1684                                         list_entry.value_node=canvas->surefind_value_node(id);
1685                                 }
1686                                 catch(Exception::IDNotFound)
1687                                 {
1688                                         error(child,"\"use\" attribute in <entry> references unknown ID -- "+id);
1689                                         continue;
1690                                 }
1691                         }
1692                         else
1693                         {
1694                                 xmlpp::Element::NodeList list = child->get_children();
1695                                 xmlpp::Element::NodeList::iterator iter;
1696
1697                                 // Search for the first non-text XML element
1698                                 for(iter = list.begin(); iter != list.end(); ++iter)
1699                                         if(dynamic_cast<xmlpp::Element*>(*iter)) break;
1700
1701                                 if(iter==list.end())
1702                                 {
1703                                         error(child,strprintf(_("<entry> is missing its contents or missing \"use\" element")));
1704                                         continue;
1705                                 }
1706
1707                                 list_entry.value_node=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1708
1709                                 if(!list_entry.value_node)
1710                                         error((*iter),"Parse of ValueNode failed");
1711
1712                                 // \todo do a search for more elements and warn if they are found
1713
1714                         }
1715
1716                         value_node->add(list_entry);
1717                         value_node->set_link(value_node->link_count()-1,list_entry.value_node);
1718                 }
1719                 else
1720                         error_unexpected_element(child,child->get_name());
1721         }
1722         return value_node;
1723 }
1724
1725 handle<ValueNode>
1726 CanvasParser::parse_value_node(xmlpp::Element *element,Canvas::Handle canvas)
1727 {
1728         handle<ValueNode> value_node;
1729         assert(element);
1730
1731         GUID guid;
1732
1733         if(element->get_attribute("guid"))
1734         {
1735                 guid=GUID(element->get_attribute("guid")->get_value())^canvas->get_root()->get_guid();
1736                 value_node=guid_cast<ValueNode>(guid);
1737                 if(value_node)
1738                         return value_node;
1739         }
1740
1741         // If ValueBase::ident_type() recognises the name, then we know it's a ValueBase
1742         if(element->get_name()!="canvas" && ValueBase::ident_type(element->get_name()))
1743         {
1744                 ValueBase data=parse_value(element,canvas);
1745
1746                 if(!data.is_valid())
1747                 {
1748                         error(element,strprintf(_("Bad data in <%s>"),element->get_name().c_str()));
1749                         return value_node;
1750                 }
1751
1752                 // We want to convert this ValueBase into a
1753                 // ValueNode_Const. That way, we can treat the
1754                 // ID like any other Datanode. Think of this
1755                 // as a shorthand for creating constant ValueNodes.
1756
1757                 value_node=ValueNode_Const::create(data);
1758         }
1759         else
1760         if(element->get_name()=="hermite" || element->get_name()=="animated")
1761                 value_node=parse_animated(element,canvas);
1762         else
1763         if(element->get_name()=="subtract")
1764                 value_node=parse_subtract(element,canvas);
1765         else
1766         if(element->get_name()=="composite")
1767                 value_node=parse_composite(element,canvas);
1768         else
1769         if(element->get_name()=="dynamic_list")
1770                 value_node=parse_dynamic_list(element,canvas);
1771         else
1772         if(element->get_name()=="bline") // This is not a typo. The dynamic list parser will parse a bline.
1773                 value_node=parse_dynamic_list(element,canvas);
1774         else
1775         if(element->get_name()=="timed_swap")
1776                 value_node=parse_timedswap(element,canvas);
1777         else
1778         if(LinkableValueNode::book().count(element->get_name()))
1779                 value_node=parse_linkable_value_node(element,canvas);
1780         else
1781         if(element->get_name()=="canvas")
1782                 value_node=ValueNode_Const::create(parse_canvas(element,canvas,true));
1783         else
1784         {
1785                 error_unexpected_element(element,element->get_name());
1786                 error(element, "Expected a ValueNode");
1787         }
1788
1789
1790         value_node->set_root_canvas(canvas->get_root());
1791
1792
1793         // If we were successful, and our element has
1794         // an ID attribute, go ahead and add it to the
1795         // value_node list
1796         if(value_node && element->get_attribute("id"))
1797         {
1798                 string id=element->get_attribute("id")->get_value();
1799
1800                 //value_node->set_id(id);
1801
1802                 // If there is already a value_node in the list
1803                 // with the same ID, then that is an error
1804                 try { canvas->add_value_node(value_node,id); }
1805                 catch(Exception::BadLinkName)
1806                 {
1807                         warning(element,strprintf(_("Bad ID \"%s\""),id.c_str()));
1808                         return value_node;
1809                 }
1810                 catch(Exception::IDAlreadyExists)
1811                 {
1812                         error(element,strprintf(_("Duplicate ID \"%s\""),id.c_str()));
1813                         return value_node;
1814                 }
1815                 catch(...)
1816                 {
1817                         error(element,strprintf(_("Unknown Exception thrown when adding ValueNode \"%s\""),id.c_str()));
1818                         throw;
1819                 }
1820         }
1821         value_node->set_guid(guid);
1822         return value_node;
1823 }
1824
1825 void
1826 CanvasParser::parse_canvas_defs(xmlpp::Element *element,Canvas::Handle canvas)
1827 {
1828         assert(element->get_name()=="defs");
1829         xmlpp::Element::NodeList list = element->get_children();
1830         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1831         {
1832                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1833                 if(!child)
1834                         continue;
1835                 else
1836                 if(child->get_name()=="canvas")
1837                         parse_canvas(child, canvas);
1838                 else
1839                         parse_value_node(child,canvas);
1840         }
1841 }
1842
1843 Layer::Handle
1844 CanvasParser::parse_layer(xmlpp::Element *element,Canvas::Handle canvas)
1845 {
1846
1847         assert(element->get_name()=="layer");
1848         Layer::Handle layer;
1849
1850         if(!element->get_attribute("type"))
1851         {
1852                 error(element,_("Missing \"type\" attribute to \"layer\" element"));
1853                 return Layer::Handle();
1854         }
1855
1856         layer=Layer::create(element->get_attribute("type")->get_value());
1857         layer->set_canvas(canvas);
1858
1859         if(element->get_attribute("group"))
1860         {
1861                 layer->add_to_group(
1862                         element->get_attribute("group")->get_value()
1863                 );
1864         }
1865
1866         // Handle the version attribute
1867         if(element->get_attribute("version"))
1868         {
1869                 String version(element->get_attribute("version")->get_value());
1870                 if(version>layer->get_version())
1871                         warning(element,_("Installed layer version is larger than layer version in file"));
1872                 if(version!=layer->get_version())
1873                         layer->set_version(version);
1874         }
1875
1876         // Handle the description
1877         if(element->get_attribute("desc"))
1878                 layer->set_description(element->get_attribute("desc")->get_value());
1879
1880         if(element->get_attribute("active"))
1881                 layer->set_active(element->get_attribute("active")->get_value()=="false"?false:true);
1882
1883         xmlpp::Element::NodeList list = element->get_children();
1884         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1885         {
1886                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1887                 if(!child)
1888                         continue;
1889                 else
1890                 if(child->get_name()=="name")
1891                         warning(child,_("<name> entry for <layer> is not yet supported. Ignoring..."));
1892                 else
1893                 if(child->get_name()=="desc")
1894                         warning(child,_("<desc> entry for <layer> is not yet supported. Ignoring..."));
1895                 else
1896                 if(child->get_name()=="param")
1897                 {
1898                         xmlpp::Element::NodeList list = child->get_children();
1899
1900                         if(!child->get_attribute("name"))
1901                         {
1902                                 error(child,_("Missing \"name\" attribute for <param>."));
1903                                 continue;
1904                         }
1905
1906                         String param_name=child->get_attribute("name")->get_value();
1907
1908                         if(child->get_attribute("use"))
1909                         {
1910                                 // If the "use" attribute is used, then the
1911                                 // element should be empty. Warn the user if
1912                                 // we find otherwise.
1913                                 if(!list.empty())
1914                                         warning(child,_("Found \"use\" attribute for <param>, but it wasn't empty. Ignoring contents..."));
1915
1916                                 String str=     child->get_attribute("use")->get_value();
1917
1918                                 if(layer->get_param(param_name).get_type()==ValueBase::TYPE_CANVAS)
1919                                 {
1920                                         if(!layer->set_param(param_name,canvas->surefind_canvas(str)))
1921                                                 error((*iter),_("Layer rejected canvas link"));
1922                                 }
1923                                 else
1924                                 try
1925                                 {
1926                                         handle<ValueNode> value_node=canvas->surefind_value_node(str);
1927
1928                                         // Assign the value_node to the dynamic parameter list
1929                                         layer->connect_dynamic_param(param_name,value_node);
1930                         }
1931                                 catch(Exception::IDNotFound)
1932                                 {
1933                                         error(child,strprintf(_("Unknown ID (%s) referenced in <param>"),str.c_str()));
1934                                 }
1935
1936                                 continue;
1937                         }
1938
1939                         xmlpp::Element::NodeList::iterator iter;
1940
1941                         // Search for the first non-text XML element
1942                         for(iter = list.begin(); iter != list.end(); ++iter)
1943                                 if(dynamic_cast<xmlpp::Element*>(*iter))
1944                                         break;
1945                                 //if(!(!dynamic_cast<xmlpp::Element*>(*iter) && (*iter)->get_name()=="text"||(*iter)->get_name()=="comment"   )) break;
1946
1947                         if(iter==list.end())
1948                         {
1949                                 error(child,_("<param> is either missing its contents, or missing a \"use\" attribute."));
1950                                 continue;
1951                         }
1952
1953                         // If we recognise the element name as a
1954                         // ValueBase, then treat is at one
1955                         if(/*(*iter)->get_name()!="canvas" && */ValueBase::ident_type((*iter)->get_name()) && !dynamic_cast<xmlpp::Element*>(*iter)->get_attribute("guid"))
1956                         {
1957                                 ValueBase data=parse_value(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1958
1959                                 if(!data.is_valid())
1960                                 {
1961                                         error((*iter),_("Bad data for <param>"));
1962                                         continue;
1963                                 }
1964
1965                                 // Set the layer's parameter, and make sure that
1966                                 // the layer liked it
1967                                 if(!layer->set_param(param_name,data))
1968                                 {
1969                                         warning((*iter),_("Layer rejected value for <param>"));
1970                                         continue;
1971                                 }
1972                         }
1973                         else    // ... otherwise, we assume that it is a ValueNode
1974                         {
1975                                 handle<ValueNode> value_node=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1976
1977                                 if(!value_node)
1978                                 {
1979                                         error((*iter),_("Bad data for <param>"));
1980                                         continue;
1981                                 }
1982
1983                                 // Assign the value_node to the dynamic parameter list
1984                                 layer->connect_dynamic_param(param_name,value_node);
1985                         }
1986
1987                         // Warn if there is trash after the param value
1988                         for(iter++; iter != list.end(); ++iter)
1989                                 if(dynamic_cast<xmlpp::Element*>(*iter))
1990                                         warning((*iter),strprintf(_("Unexpected element <%s> after <param> data, ignoring..."),(*iter)->get_name().c_str()));
1991                         continue;
1992                 }
1993                 else
1994                         error_unexpected_element(child,child->get_name());
1995         }
1996
1997         layer->reset_version();
1998         return layer;
1999 }
2000
2001 Canvas::Handle
2002 CanvasParser::parse_canvas(xmlpp::Element *element,Canvas::Handle parent,bool inline_, String filename)
2003 {
2004
2005         if(element->get_name()!="canvas")
2006         {
2007                 error_unexpected_element(element,element->get_name(),"canvas");
2008                 return Canvas::Handle();
2009         }
2010         Canvas::Handle canvas;
2011
2012
2013
2014         if(parent && (element->get_attribute("id") || inline_))
2015         {
2016                 if(inline_)
2017                 {
2018                         canvas=Canvas::create_inline(parent);
2019                 }
2020                 else
2021                 {
2022                         try
2023                         {
2024                                 canvas=parent->find_canvas(element->get_attribute("id")->get_value());
2025                         }
2026                         catch(...)
2027                         {
2028                                 canvas=parent->new_child_canvas(element->get_attribute("id")->get_value());
2029                         }
2030                 }
2031                 canvas->rend_desc().clear_flags();
2032         }
2033         else
2034         {
2035                 canvas=Canvas::create();
2036                 if(filename=="/dev/stdin")
2037                         canvas->set_file_name("./stdin.sif");
2038                 else
2039                         canvas->set_file_name(filename);
2040                 canvas->rend_desc().clear_flags();
2041         }
2042
2043         if(element->get_attribute("guid"))
2044         {
2045                 GUID guid(element->get_attribute("guid")->get_value());
2046                 if(guid_cast<Canvas>(guid))
2047                         return guid_cast<Canvas>(guid);
2048                 else
2049                         canvas->set_guid(guid);
2050         }
2051
2052         if(element->get_attribute("width"))
2053                 canvas->rend_desc().set_w(atoi(element->get_attribute("width")->get_value().c_str()));
2054
2055         if(element->get_attribute("height"))
2056                 canvas->rend_desc().set_h(atoi(element->get_attribute("height")->get_value().c_str()));
2057
2058         if(element->get_attribute("xres"))
2059                 canvas->rend_desc().set_x_res(atof(element->get_attribute("xres")->get_value().c_str()));
2060
2061         if(element->get_attribute("yres"))
2062                 canvas->rend_desc().set_y_res(atof(element->get_attribute("yres")->get_value().c_str()));
2063
2064
2065         if(element->get_attribute("fps"))
2066                 canvas->rend_desc().set_frame_rate(atof(element->get_attribute("fps")->get_value().c_str()));
2067
2068         if(element->get_attribute("start-time"))
2069                 canvas->rend_desc().set_time_start(Time(element->get_attribute("start-time")->get_value(),canvas->rend_desc().get_frame_rate()));
2070
2071         if(element->get_attribute("begin-time"))
2072                 canvas->rend_desc().set_time_start(Time(element->get_attribute("begin-time")->get_value(),canvas->rend_desc().get_frame_rate()));
2073
2074         if(element->get_attribute("end-time"))
2075                 canvas->rend_desc().set_time_end(Time(element->get_attribute("end-time")->get_value(),canvas->rend_desc().get_frame_rate()));
2076
2077         if(element->get_attribute("antialias"))
2078                 canvas->rend_desc().set_antialias(atoi(element->get_attribute("antialias")->get_value().c_str()));
2079
2080         if(element->get_attribute("view-box"))
2081         {
2082                 string values=element->get_attribute("view-box")->get_value();
2083                 Vector
2084                         tl,
2085                         br;
2086                 tl[0]=atof(string(values.data(),values.find(' ')).c_str());
2087                 values=string(values.begin()+values.find(' ')+1,values.end());
2088                 tl[1]=atof(string(values.data(),values.find(' ')).c_str());
2089                 values=string(values.begin()+values.find(' ')+1,values.end());
2090                 br[0]=atof(string(values.data(),values.find(' ')).c_str());
2091                 values=string(values.begin()+values.find(' ')+1,values.end());
2092                 br[1]=atof(values.c_str());
2093
2094                 canvas->rend_desc().set_tl(tl);
2095                 canvas->rend_desc().set_br(br);
2096         }
2097
2098         if(element->get_attribute("bgcolor"))
2099         {
2100                 string values=element->get_attribute("bgcolor")->get_value();
2101                 Color bg;
2102
2103                 bg.set_r(atof(string(values.data(),values.find(' ')).c_str()));
2104                 values=string(values.begin()+values.find(' ')+1,values.end());
2105
2106                 bg.set_g(atof(string(values.data(),values.find(' ')).c_str()));
2107                 values=string(values.begin()+values.find(' ')+1,values.end());
2108
2109                 bg.set_b(atof(string(values.data(),values.find(' ')).c_str()));
2110                 values=string(values.begin()+values.find(' ')+1,values.end());
2111
2112                 bg.set_a(atof(values.c_str()));
2113
2114                 canvas->rend_desc().set_bg_color(bg);
2115         }
2116
2117         if(element->get_attribute("focus"))
2118         {
2119                 string values=element->get_attribute("focus")->get_value();
2120                 Vector focus;
2121
2122                 focus[0]=atof(string(values.data(),values.find(' ')).c_str());
2123                 values=string(values.begin()+values.find(' ')+1,values.end());
2124                 focus[1]=atof(values.c_str());
2125
2126                 canvas->rend_desc().set_focus(focus);
2127         }
2128
2129         canvas->rend_desc().set_flags(RendDesc::PX_ASPECT|RendDesc::IM_SPAN);
2130
2131         xmlpp::Element::NodeList list = element->get_children();
2132         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
2133         {
2134                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
2135                 if(child)
2136                 {
2137                         if(child->get_name()=="defs")
2138                         {
2139                                 if(canvas->is_inline())
2140                                         error(child,_("Inline canvas cannot have a <defs> section"));
2141                                 parse_canvas_defs(child, canvas);
2142                         }
2143                         else
2144                         if(child->get_name()=="keyframe")
2145                         {
2146                                 if(canvas->is_inline())
2147                                 {
2148                                         warning(child,_("Inline canvas cannot have keyframes"));
2149                                         continue;
2150                                 }
2151
2152                                 canvas->keyframe_list().add(parse_keyframe(child,canvas));
2153                                 canvas->keyframe_list().sync();
2154                         }
2155                         else
2156                         if(child->get_name()=="meta")
2157                         {
2158                                 if(canvas->is_inline())
2159                                 {
2160                                         warning(child,_("Inline canvases cannot have metadata"));
2161                                         continue;
2162                                 }
2163
2164                                 String name,content;
2165
2166                                 if(!child->get_attribute("name"))
2167                                 {
2168                                         warning(child,_("<meta> must have a name"));
2169                                         continue;
2170                                 }
2171
2172                                 if(!child->get_attribute("content"))
2173                                 {
2174                                         warning(child,_("<meta> must have content"));
2175                                         continue;
2176                                 }
2177
2178                                 canvas->set_meta_data(child->get_attribute("name")->get_value(),child->get_attribute("content")->get_value());
2179                         }
2180                         else if(child->get_name()=="name")
2181                         {
2182                                 xmlpp::Element::NodeList list = child->get_children();
2183
2184                                 // If we don't have any name, warn
2185                                 if(list.empty())
2186                                         warning(child,_("blank \"name\" entitity"));
2187
2188                                 string tmp;
2189                                 for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
2190                                         if(dynamic_cast<xmlpp::TextNode*>(*iter))tmp+=dynamic_cast<xmlpp::TextNode*>(*iter)->get_content();
2191                                 canvas->set_name(tmp);
2192                         }
2193                         else
2194                         if(child->get_name()=="desc")
2195                         {
2196
2197                                 xmlpp::Element::NodeList list = child->get_children();
2198
2199                                 // If we don't have any description, warn
2200                                 if(list.empty())
2201                                         warning(child,_("blank \"desc\" entitity"));
2202
2203                                 string tmp;
2204                                 for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
2205                                         if(dynamic_cast<xmlpp::TextNode*>(*iter))tmp+=dynamic_cast<xmlpp::TextNode*>(*iter)->get_content();
2206                                 canvas->set_description(tmp);
2207                         }
2208                         else
2209                         if(child->get_name()=="author")
2210                         {
2211
2212                                 xmlpp::Element::NodeList list = child->get_children();
2213
2214                                 // If we don't have any description, warn
2215                                 if(list.empty())
2216                                         warning(child,_("blank \"author\" entitity"));
2217
2218                                 string tmp;
2219                                 for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
2220                                         if(dynamic_cast<xmlpp::TextNode*>(*iter))tmp+=dynamic_cast<xmlpp::TextNode*>(*iter)->get_content();
2221                                 canvas->set_author(tmp);
2222                         }
2223                         else
2224                         if(child->get_name()=="layer")
2225                         {
2226                                 //if(canvas->is_inline())
2227                                 //      canvas->push_front(parse_layer(child,canvas->parent()));
2228                                 //else
2229                                         canvas->push_front(parse_layer(child,canvas));
2230                         }
2231                         else
2232                                 error_unexpected_element(child,child->get_name());
2233                 }
2234 //              else
2235 //              if((child->get_name()=="text"||child->get_name()=="comment") && child->has_child_text())
2236 //                      continue;
2237         }
2238
2239         if(canvas->value_node_list().placeholder_count())
2240         {
2241                 error(element,strprintf(_("Canvas %s has undefined ValueNodes"),canvas->get_id().c_str()));
2242         }
2243
2244         return canvas;
2245 }
2246
2247 Canvas::Handle
2248 CanvasParser::parse_from_file(const String &file)
2249 {
2250         return parse_from_file_as(file,file);
2251 }
2252
2253 Canvas::Handle
2254 CanvasParser::parse_from_file_as(const String &file_,const String &as_)
2255 {
2256         CHECK_EXPIRE_TIME();
2257         try
2258         {
2259         ChangeLocale change_locale(LC_NUMERIC, "C");
2260                 String file(unix_to_local_path(file_));
2261                 String as(unix_to_local_path(as_));
2262
2263                 if(get_open_canvas_map().count(etl::absolute_path(as)))
2264                         return get_open_canvas_map()[etl::absolute_path(as)];
2265
2266                 filename=as;
2267                 total_warnings_=0;
2268                 xmlpp::DomParser parser(file);
2269                 if(parser)
2270                 {
2271                         Canvas::Handle canvas(parse_canvas(parser.get_document()->get_root_node(),0,false,as));
2272                         get_open_canvas_map()[etl::absolute_path(as)]=canvas;
2273                         canvas->signal_deleted().connect(sigc::bind(sigc::ptr_fun(_remove_from_open_canvas_map),canvas.get()));
2274                         canvas->signal_file_name_changed().connect(sigc::bind(sigc::ptr_fun(_canvas_file_name_changed),canvas.get()));
2275
2276
2277
2278                         const ValueNodeList& value_node_list(canvas->value_node_list());
2279
2280                         again:
2281                         ValueNodeList::const_iterator iter;
2282                         for(iter=value_node_list.begin();iter!=value_node_list.end();++iter)
2283                         {
2284                                 ValueNode::Handle value_node(*iter);
2285                                 if(value_node->is_exported() && value_node->get_id().find("Unnamed")==0)
2286                                 {
2287                                         canvas->remove_value_node(value_node);
2288                                         goto again;
2289                                 }
2290                         }
2291
2292                         return canvas;
2293                 }
2294         }
2295         catch(Exception::BadLinkName) { synfig::error("BadLinkName Thrown"); }
2296         catch(Exception::BadType) { synfig::error("BadType Thrown"); }
2297         catch(Exception::FileNotFound) { synfig::error("FileNotFound Thrown"); }
2298         catch(Exception::IDNotFound) { synfig::error("IDNotFound Thrown"); }
2299         catch(Exception::IDAlreadyExists) { synfig::error("IDAlreadyExists Thrown"); }
2300         catch(const std::exception& ex)
2301         {
2302                 synfig::error("Standard Exception: "+String(ex.what()));
2303                 return Canvas::Handle();
2304         }
2305         catch(const String& str)
2306         {
2307                 cerr<<str<<endl;
2308                 //      synfig::error(str);
2309                 return Canvas::Handle();
2310         }
2311         return Canvas::Handle();
2312 }
2313
2314 Canvas::Handle
2315 CanvasParser::parse_from_string(const String &data)
2316 {
2317         CHECK_EXPIRE_TIME();
2318
2319         try
2320         {
2321         ChangeLocale change_locale(LC_NUMERIC, "C");
2322                 filename=_("<INTERNAL>");
2323                 total_warnings_=0;
2324                 xmlpp::DomParser parser;
2325                 parser.parse_memory(data);
2326                 xmlpp::Element *root=parser.get_document()->get_root_node();
2327                 if(parser)
2328                 {
2329                         Canvas::Handle canvas(parse_canvas(root));
2330                         canvas->signal_deleted().connect(sigc::bind(sigc::ptr_fun(_remove_from_open_canvas_map),canvas.get()));
2331                         canvas->signal_file_name_changed().connect(sigc::bind(sigc::ptr_fun(_canvas_file_name_changed),canvas.get()));
2332
2333                         const ValueNodeList& value_node_list(canvas->value_node_list());
2334                         again:
2335                         ValueNodeList::const_iterator iter;
2336                         for(iter=value_node_list.begin();iter!=value_node_list.end();++iter)
2337                         {
2338                                 ValueNode::Handle value_node(*iter);
2339                                 if(value_node->is_exported() && value_node->get_id().find("Unnamed")==0)
2340                                 {
2341                                         canvas->remove_value_node(value_node);
2342                                         goto again;
2343                                 }
2344                         }
2345
2346                         return canvas;
2347                 }
2348         }
2349         catch(Exception::BadLinkName) { synfig::error("BadLinkName Thrown"); }
2350         catch(Exception::BadType) { synfig::error("BadType Thrown"); }
2351         catch(Exception::FileNotFound) { synfig::error("FileNotFound Thrown"); }
2352         catch(Exception::IDNotFound) { synfig::error("IDNotFound Thrown"); }
2353         catch(Exception::IDAlreadyExists) { synfig::error("IDAlreadyExists Thrown"); }
2354         catch(const std::exception& ex)
2355         {
2356                 synfig::error("Standard Exception: "+String(ex.what()));
2357                 return Canvas::Handle();
2358         }
2359         catch(const String& str)
2360         {
2361                 cerr<<str<<endl;
2362                 //      synfig::error(str);
2363                 return Canvas::Handle();
2364         }
2365         return Canvas::Handle();
2366 }