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

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file loadcanvas.cpp
   3 **      \brief writeme
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
   9 **      Copyright (c) 2007 Chris Moore
  10 **
  11 **      This package is free software; you can redistribute it and/or
  12 **      modify it under the terms of the GNU General Public License as
  13 **      published by the Free Software Foundation; either version 2 of
  14 **      the License, or (at your option) any later version.
  15 **
  16 **      This package is distributed in the hope that it will be useful,
  17 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  19 **      General Public License for more details.
  20 **      \endlegal
  21 */
  22 /* ========================================================================= */
  23
  24 /* === H E A D E R S ======================================================= */
  25
  26 #ifdef USING_PCH
  27 #       include "pch.h"
  28 #else
  29 #ifdef HAVE_CONFIG_H
  30 #       include <config.h>
  31 #endif
  32
  33 #include <cstdlib>
  34 #include <cstdio>
  35 #include <cstring>
  36 #include <ETL/stringf>
  37 #include <libxml++/libxml++.h>
  38 #include <vector>
  39 #include <stdexcept>
  40 #include <iostream>
  41
  42 #include "loadcanvas.h"
  43 #include "valuenode.h"
  44 #include "valuenode_subtract.h"
  45 #include "valuenode_animated.h"
  46 #include "valuenode_composite.h"
  47 #include "valuenode_const.h"
  48 #include "valuenode_linear.h"
  49 #include "valuenode_dynamiclist.h"
  50 #include "valuenode_reference.h"
  51 #include "valuenode_scale.h"
  52 #include "valuenode_timedswap.h"
  53 #include "valuenode_twotone.h"
  54 #include "valuenode_stripes.h"
  55 #include "valuenode_segcalctangent.h"
  56 #include "valuenode_segcalcvertex.h"
  57 #include "valuenode_bline.h"
  58
  59 #include "layer.h"
  60 #include "string.h"
  61
  62 #include "exception.h"
  63
  64 #include "gradient.h"
  65
  66 #include <map>
  67 #include <sigc++/bind.h>
  68
  69 #endif
  70
  71 /* === U S I N G =========================================================== */
  72
  73 using namespace std;
  74 using namespace synfig;
  75 using namespace etl;
  76
  77 /*
  78 class test_class {
  79 static int bleh;
  80 public:
  81         test_class() { assert(!bleh); bleh++; synfig::info("test_class: initi: %d",bleh); }
  82         ~test_class() { assert(bleh); synfig::info("test_class: uninit: %d",bleh); bleh--; }
  83 };
  84 int test_class::bleh(0);
  85
  86 test_class test_class_instance;
  87 */
  88
  89 /* === M A C R O S ========================================================= */
  90
  91 #define VALUENODE_COMPATIBILITY_URL "http://synfig.org/Convert#Compatibility"
  92
  93 inline bool is_whitespace(char x) { return ((x)=='\n' || (x)=='\t' || (x)==' '); }
  94
  95 /* === P R O C E D U R E S ================================================= */
  96
  97 static std::map<String, Canvas::LooseHandle>* open_canvas_map_(0);
  98
  99 std::map<synfig::String, etl::loose_handle<Canvas> >& synfig::get_open_canvas_map()
 100 {
 101         if(!open_canvas_map_)
 102                 open_canvas_map_=new std::map<String, Canvas::LooseHandle>;
 103         return *open_canvas_map_;
 104 }
 105
 106 static void _remove_from_open_canvas_map(Canvas *x) { get_open_canvas_map().erase(etl::absolute_path(x->get_file_name())); }
 107
 108 static void _canvas_file_name_changed(Canvas *x)
 109 {
 110         std::map<synfig::String, etl::loose_handle<Canvas> >::iterator iter;
 111
 112         for(iter=get_open_canvas_map().begin();iter!=get_open_canvas_map().end();++iter)
 113                 if(iter->second==x)
 114                         break;
 115         assert(iter!=get_open_canvas_map().end());
 116         if(iter==get_open_canvas_map().end())
 117                 return;
 118         get_open_canvas_map().erase(iter->first);
 119         get_open_canvas_map()[etl::absolute_path(x->get_file_name())]=x;
 120
 121 }
 122
 123 Canvas::Handle
 124 synfig::open_canvas(const String &filename)
 125 {
 126         CanvasParser parser;
 127
 128         parser.set_allow_errors(true);
 129
 130         Canvas::Handle canvas=parser.parse_from_file(filename);
 131
 132         if(parser.error_count())
 133                 return Canvas::Handle();
 134
 135         return canvas;
 136 }
 137
 138 Canvas::Handle
 139 synfig::open_canvas_as(const String &filename,const String &as)
 140 {
 141         CanvasParser parser;
 142
 143         parser.set_allow_errors(true);
 144
 145         Canvas::Handle canvas=parser.parse_from_file_as(filename,as);
 146
 147         if(parser.error_count())
 148                 return Canvas::Handle();
 149
 150         return canvas;
 151 }
 152
 153 Canvas::Handle
 154 synfig::string_to_canvas(const String &data)
 155 {
 156         CanvasParser parser;
 157
 158         parser.set_allow_errors(true);
 159
 160         Canvas::Handle canvas=parser.parse_from_string(data);
 161
 162         if(parser.error_count())
 163                 return Canvas::Handle();
 164
 165         return canvas;
 166 }
 167
 168 /* === M E T H O D S ======================================================= */
 169
 170 void
 171 CanvasParser::error_unexpected_element(xmlpp::Node *element,const String &got, const String &expected)
 172 {
 173         error(element,strprintf(_("Unexpected element <%s>, Expected <%s>"),got.c_str(),expected.c_str()));
 174 }
 175
 176 void
 177 CanvasParser::error_unexpected_element(xmlpp::Node *element,const String &got)
 178 {
 179         error(element,strprintf(_("Unexpected element <%s>"),got.c_str()));
 180 }
 181
 182 void
 183 CanvasParser::warning(xmlpp::Node *element, const String &text)
 184 {
 185         string str=strprintf("%s:<%s>:%d: warning: ",filename.c_str(),element->get_name().c_str(),element->get_line())+text;
 186         //synfig::warning(str);
 187         cerr<<str<<endl;
 188         total_warnings_++;
 189         if(total_warnings_>=max_warnings_)
 190                 fatal_error(element, _("Too many warnings"));
 191 }
 192
 193 void
 194 CanvasParser::error(xmlpp::Node *element, const String &text)
 195 {
 196         string str=strprintf("%s:<%s>:%d: error: ",filename.c_str(),element->get_name().c_str(),element->get_line())+text;
 197         total_errors_++;
 198         if(!allow_errors_)
 199                 throw runtime_error(str);
 200         cerr<<str<<endl;
 201         //      synfig::error(str);
 202 }
 203
 204 void
 205 CanvasParser::fatal_error(xmlpp::Node *element, const String &text)
 206 {
 207         string str=strprintf("%s:<%s>:%d:",filename.c_str(),element->get_name().c_str(),element->get_line())+text;
 208         throw runtime_error(str);
 209 }
 210
 211
 212
 213 Keyframe
 214 CanvasParser::parse_keyframe(xmlpp::Element *element,Canvas::Handle canvas)
 215 {
 216         assert(element->get_name()=="keyframe");
 217
 218         if(!element->get_attribute("time"))
 219         {
 220                 error(element,strprintf(_("<%s> is missing \"%s\" attribute"),"real","time"));
 221                 return Keyframe();
 222         }
 223
 224         Keyframe ret(Time(element->get_attribute("time")->get_value(),canvas->rend_desc().get_frame_rate()));
 225
 226
 227         if(element->get_children().empty())
 228                 return ret;
 229
 230         if(element->get_child_text()->get_content().empty())
 231                 return ret;
 232
 233         ret.set_description(element->get_child_text()->get_content());
 234
 235         return ret;
 236 }
 237
 238
 239 Real
 240 CanvasParser::parse_real(xmlpp::Element *element)
 241 {
 242         assert(element->get_name()=="real");
 243
 244         if(!element->get_children().empty())
 245                 warning(element, strprintf(_("<%s> should not contain anything"),"real"));
 246
 247         if(!element->get_attribute("value"))
 248         {
 249                 error(element,strprintf(_("<%s> is missing \"value\" attribute"),"real"));
 250                 return false;
 251         }
 252
 253         string val=element->get_attribute("value")->get_value();
 254
 255         return atof(val.c_str());
 256 }
 257
 258 Time
 259 CanvasParser::parse_time(xmlpp::Element *element,Canvas::Handle canvas)
 260 {
 261         assert(element->get_name()=="time");
 262
 263         if(!element->get_children().empty())
 264                 warning(element, strprintf(_("<%s> should not contain anything"),"time"));
 265
 266         if(!element->get_attribute("value"))
 267         {
 268                 error(element,strprintf(_("<%s> is missing \"value\" attribute"),"time"));
 269                 return false;
 270         }
 271
 272         string val=element->get_attribute("value")->get_value();
 273
 274         return Time(val,canvas->rend_desc().get_frame_rate());
 275 }
 276
 277 int
 278 CanvasParser::parse_integer(xmlpp::Element *element)
 279 {
 280         assert(element->get_name()=="integer");
 281
 282         if(!element->get_children().empty())
 283                 warning(element, strprintf(_("<%s> should not contain anything"),"integer"));
 284
 285         if(!element->get_attribute("value"))
 286         {
 287                 error(element,strprintf(_("<%s> is missing \"value\" attribute"),"integer"));
 288                 return false;
 289         }
 290
 291         string val=element->get_attribute("value")->get_value();
 292
 293         return atoi(val.c_str());
 294 }
 295
 296 // see 'minor hack' at the end of parse_vector() below
 297 // making this 'static' to give it file local scope
 298 // stops it working (where working means working around
 299 // bug #1509627)
 300 Vector &canvas_parser_vector_id(Vector &vector)
 301 {
 302         return vector;
 303 }
 304
 305 Vector
 306 CanvasParser::parse_vector(xmlpp::Element *element)
 307 {
 308         assert(element->get_name()=="vector");
 309
 310         if(element->get_children().empty())
 311         {
 312                 error(element, "Undefined value in <vector>");
 313                 return Vector();
 314         }
 315
 316         Vector vect;
 317
 318         xmlpp::Element::NodeList list = element->get_children();
 319         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 320         {
 321                 xmlpp::Element *child=dynamic_cast<xmlpp::Element*>((xmlpp::Node*)*iter);
 322                 if(!child)
 323                         continue;
 324                 else
 325                 if(child->get_name()=="x")
 326                 {
 327                         if(child->get_children().empty())
 328                         {
 329                                 error(element, "Undefined value in <x>");
 330                                 return Vector();
 331                         }
 332                         vect[0]=atof(child->get_child_text()->get_content().c_str());
 333                 }
 334                 else
 335                 if(child->get_name()=="y")
 336                 {
 337                         if(child->get_children().empty())
 338                         {
 339                                 error(element, "Undefined value in <y>");
 340                                 return Vector();
 341                         }
 342                         vect[1]=atof(child->get_child_text()->get_content().c_str());
 343                 }
 344                 else
 345                         error_unexpected_element(child,child->get_name());
 346         }
 347         // Minor hack - gcc 4.1.2 and earlier think that we're not using
 348         // 'vect' and optimize it out at -O2 and higher.  This convinces
 349         // them that we are really using it.
 350         return canvas_parser_vector_id(vect);
 351         // When the bug is fixed, we can just do this instead:
 352         // return vect;
 353 }
 354
 355 Color
 356 CanvasParser::parse_color(xmlpp::Element *element)
 357 {
 358         assert(element->get_name()=="color");
 359
 360         if(element->get_children().empty())
 361         {
 362                 error(element, "Undefined value in <color>");
 363                 return Color();
 364         }
 365
 366         Color color(0);
 367
 368         xmlpp::Element::NodeList list = element->get_children();
 369         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 370         {
 371                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 372                 if(!child)
 373                         continue;
 374                 else
 375                 if(child->get_name()=="r")
 376                 {
 377                         if(child->get_children().empty())
 378                         {
 379                                 error(element, "Undefined value in <r>");
 380                                 return Color();
 381                         }
 382                         color.set_r(atof(child->get_child_text()->get_content().c_str()));
 383                 }
 384                 else
 385                 if(child->get_name()=="g")
 386                 {
 387                         if(child->get_children().empty())
 388                         {
 389                                 error(element, "Undefined value in <g>");
 390                                 return Color();
 391                         }
 392                         color.set_g(atof(child->get_child_text()->get_content().c_str()));
 393                 }
 394                 else
 395                 if(child->get_name()=="b")
 396                 {
 397                         if(child->get_children().empty())
 398                         {
 399                                 error(element, "Undefined value in <b>");
 400                                 return Color();
 401                         }
 402                         color.set_b(atof(child->get_child_text()->get_content().c_str()));
 403                 }
 404                 else
 405                 if(child->get_name()=="a")
 406                 {
 407                         if(child->get_children().empty())
 408                         {
 409                                 error(element, "Undefined value in <a>");
 410                                 return Color();
 411                         }
 412                         color.set_a(atof(child->get_child_text()->get_content().c_str()));
 413                 }
 414                 else
 415                         error_unexpected_element(child,child->get_name());
 416         }
 417
 418         return color;
 419 }
 420
 421 synfig::String
 422 CanvasParser::parse_string(xmlpp::Element *element)
 423 {
 424         assert(element->get_name()=="string");
 425
 426         if(element->get_children().empty())
 427         {
 428                 warning(element, "Undefined value in <string>");
 429                 return synfig::String();
 430         }
 431
 432         if(element->get_child_text()->get_content().empty())
 433         {
 434                 warning(element, "Content element of <string> appears to be empty");
 435                 return synfig::String();
 436         }
 437
 438         return element->get_child_text()->get_content();
 439 }
 440
 441 bool
 442 CanvasParser::parse_bool(xmlpp::Element *element)
 443 {
 444         assert(element->get_name()=="bool");
 445
 446         if(!element->get_children().empty())
 447                 warning(element, strprintf(_("<%s> should not contain anything"),"bool"));
 448
 449         if(!element->get_attribute("value"))
 450         {
 451                 error(element,strprintf(_("<%s> is missing \"value\" attribute"),"bool"));
 452                 return false;
 453         }
 454
 455         string val=element->get_attribute("value")->get_value();
 456
 457         if(val=="true" || val=="1")
 458                 return true;
 459         if(val=="false" || val=="0")
 460                 return false;
 461
 462         error(element,strprintf(_("Bad value \"%s\" in <%s>"),val.c_str(),"bool"));
 463
 464         return false;
 465 }
 466
 467 Gradient
 468 CanvasParser::parse_gradient(xmlpp::Element *node)
 469 {
 470         assert(node->get_name()=="gradient");
 471         Gradient ret;
 472
 473         xmlpp::Element::NodeList list = node->get_children();
 474         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 475         {
 476                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 477                 if(!child)
 478                         continue;
 479                 else
 480                 {
 481                         Gradient::CPoint cpoint;
 482                         cpoint.color=parse_color(child);
 483
 484                         if(!child->get_attribute("pos"))
 485                         {
 486                                 error(child,strprintf(_("<%s> is missing \"pos\" attribute"),"gradient"));
 487                                 return Gradient();
 488                         }
 489
 490                         cpoint.pos=atof(child->get_attribute("pos")->get_value().c_str());
 491
 492                         ret.push_back(cpoint);
 493                 }
 494         }
 495         ret.sort();
 496         return ret;
 497 }
 498
 499 ValueBase
 500 CanvasParser::parse_list(xmlpp::Element *element,Canvas::Handle canvas)
 501 {
 502         vector<ValueBase> value_list;
 503
 504         xmlpp::Element::NodeList list = element->get_children();
 505         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 506         {
 507                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 508                 if(!child)
 509                         continue;
 510                 else
 511                 {
 512                         value_list.push_back(parse_value(child,canvas));
 513                         if(!value_list.back().is_valid())
 514                         {
 515                                 value_list.pop_back();
 516                                 error(child,"Bad ValueBase");
 517                                 continue;
 518                         }
 519                 }
 520         }
 521         return value_list;
 522 }
 523
 524 Segment
 525 CanvasParser::parse_segment(xmlpp::Element *element)
 526 {
 527         assert(element->get_name()=="segment");
 528
 529         if(element->get_children().empty())
 530         {
 531                 error(element, "Undefined value in <segment>");
 532                 return Segment();
 533         }
 534
 535         Segment seg;
 536
 537         xmlpp::Element::NodeList list = element->get_children();
 538         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 539         {
 540                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 541                 if(!child)
 542                         continue;
 543                 else
 544                 if(child->get_name()=="p1")
 545                 {
 546                         xmlpp::Element::NodeList list = child->get_children();
 547                         xmlpp::Element::NodeList::iterator iter;
 548
 549                         // Search for the first non-text XML element
 550                         for(iter = list.begin(); iter != list.end(); ++iter)
 551                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 552
 553                         if(iter==list.end())
 554                         {
 555                                 error(element, "Undefined value in <p1>");
 556                                 continue;
 557                         }
 558
 559                         if((*iter)->get_name()!="vector")
 560                         {
 561                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 562                                 continue;
 563                         }
 564
 565                         seg.p1=parse_vector(dynamic_cast<xmlpp::Element*>(*iter));
 566                 }
 567                 else
 568                 if(child->get_name()=="t1")
 569                 {
 570                         xmlpp::Element::NodeList list = child->get_children();
 571                         xmlpp::Element::NodeList::iterator iter;
 572
 573                         // Search for the first non-text XML element
 574                         for(iter = list.begin(); iter != list.end(); ++iter)
 575                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 576
 577                         if(iter==list.end())
 578                         {
 579                                 error(element, "Undefined value in <t1>");
 580                                 continue;
 581                         }
 582
 583                         if((*iter)->get_name()!="vector")
 584                         {
 585                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 586                                 continue;
 587                         }
 588
 589                         seg.t1=parse_vector(dynamic_cast<xmlpp::Element*>(*iter));
 590                 }
 591                 else
 592                 if(child->get_name()=="p2")
 593                 {
 594                         xmlpp::Element::NodeList list = child->get_children();
 595                         xmlpp::Element::NodeList::iterator iter;
 596
 597                         // Search for the first non-text XML element
 598                         for(iter = list.begin(); iter != list.end(); ++iter)
 599                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 600
 601                         if(iter==list.end())
 602                         {
 603                                 error(element, "Undefined value in <p2>");
 604                                 continue;
 605                         }
 606
 607                         if((*iter)->get_name()!="vector")
 608                         {
 609                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 610                                 continue;
 611                         }
 612
 613                         seg.p2=parse_vector(dynamic_cast<xmlpp::Element*>(*iter));
 614                 }
 615                 else
 616                 if(child->get_name()=="t2")
 617                 {
 618                         xmlpp::Element::NodeList list = child->get_children();
 619                         xmlpp::Element::NodeList::iterator iter;
 620
 621                         // Search for the first non-text XML element
 622                         for(iter = list.begin(); iter != list.end(); ++iter)
 623                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 624
 625                         if(iter==list.end())
 626                         {
 627                                 error(element, "Undefined value in <t2>");
 628                                 continue;
 629                         }
 630
 631                         if((*iter)->get_name()!="vector")
 632                         {
 633                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 634                                 continue;
 635                         }
 636
 637                         seg.t2=parse_vector(dynamic_cast<xmlpp::Element*>(*iter));
 638                 }
 639                 else
 640                         error_unexpected_element(child,child->get_name());
 641         }
 642         return seg;
 643 }
 644
 645 BLinePoint
 646 CanvasParser::parse_bline_point(xmlpp::Element *element)
 647 {
 648         assert(element->get_name()=="bline_point");
 649         if(element->get_children().empty())
 650         {
 651                 error(element, "Undefined value in <bline_point>");
 652                 return BLinePoint();
 653         }
 654
 655         BLinePoint ret;
 656         ret.set_split_tangent_flag(false);
 657
 658         xmlpp::Element::NodeList list = element->get_children();
 659         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 660         {
 661                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 662                 if(!child)
 663                         continue;
 664                 else
 665                 // Vertex
 666                 if(child->get_name()[0]=='v' || child->get_name()=="p1")
 667                 {
 668                         xmlpp::Element::NodeList list = child->get_children();
 669                         xmlpp::Element::NodeList::iterator iter;
 670
 671                         // Search for the first non-text XML element
 672                         for(iter = list.begin(); iter != list.end(); ++iter)
 673                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 674
 675                         if(iter==list.end())
 676                         {
 677                                 error(element, "Undefined value in <vertex>");
 678                                 continue;
 679                         }
 680
 681                         if((*iter)->get_name()!="vector")
 682                         {
 683                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 684                                 continue;
 685                         }
 686
 687                         ret.set_vertex(parse_vector(dynamic_cast<xmlpp::Element*>(*iter)));
 688                 }
 689                 else
 690                 // Tangent 1
 691                 if(child->get_name()=="t1" || child->get_name()=="tangent")
 692                 {
 693                         xmlpp::Element::NodeList list = child->get_children();
 694                         xmlpp::Element::NodeList::iterator iter;
 695
 696                         // Search for the first non-text XML element
 697                         for(iter = list.begin(); iter != list.end(); ++iter)
 698                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 699
 700                         if(iter==list.end())
 701                         {
 702                                 error(element, "Undefined value in <t1>");
 703                                 continue;
 704                         }
 705
 706                         if((*iter)->get_name()!="vector")
 707                         {
 708                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 709                                 continue;
 710                         }
 711
 712                         ret.set_tangent1(parse_vector(dynamic_cast<xmlpp::Element*>(*iter)));
 713                 }
 714                 else
 715                 // Tangent 2
 716                 if(child->get_name()=="t2")
 717                 {
 718                         xmlpp::Element::NodeList list = child->get_children();
 719                         xmlpp::Element::NodeList::iterator iter;
 720
 721                         // Search for the first non-text XML element
 722                         for(iter = list.begin(); iter != list.end(); ++iter)
 723                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 724
 725                         if(iter==list.end())
 726                         {
 727                                 error(element, "Undefined value in <t2>");
 728                                 continue;
 729                         }
 730
 731                         if((*iter)->get_name()!="vector")
 732                         {
 733                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 734                                 continue;
 735                         }
 736
 737                         ret.set_tangent2(parse_vector(dynamic_cast<xmlpp::Element*>(*iter)));
 738                         ret.set_split_tangent_flag(true);
 739                 }
 740                 else
 741                 // width
 742                 if(child->get_name()=="width")
 743                 {
 744                         xmlpp::Element::NodeList list = child->get_children();
 745                         xmlpp::Element::NodeList::iterator iter;
 746
 747                         // Search for the first non-text XML element
 748                         for(iter = list.begin(); iter != list.end(); ++iter)
 749                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 750
 751                         if(iter==list.end())
 752                         {
 753                                 error(element, "Undefined value in <width>");
 754                                 continue;
 755                         }
 756
 757                         if((*iter)->get_name()!="real")
 758                         {
 759                                 error_unexpected_element((*iter),(*iter)->get_name(),"real");
 760                                 continue;
 761                         }
 762
 763                         ret.set_width(parse_real(dynamic_cast<xmlpp::Element*>(*iter)));
 764                 }
 765                 else
 766                 // origin
 767                 if(child->get_name()=="origin")
 768                 {
 769                         xmlpp::Element::NodeList list = child->get_children();
 770                         xmlpp::Element::NodeList::iterator iter;
 771
 772                         // Search for the first non-text XML element
 773                         for(iter = list.begin(); iter != list.end(); ++iter)
 774                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 775
 776                         if(iter==list.end())
 777                         {
 778                                 error(element, "Undefined value in <origin>");
 779                                 continue;
 780                         }
 781
 782                         if((*iter)->get_name()!="real")
 783                         {
 784                                 error_unexpected_element((*iter),(*iter)->get_name(),"real");
 785                                 continue;
 786                         }
 787
 788                         ret.set_origin(parse_real(dynamic_cast<xmlpp::Element*>(*iter)));
 789                 }
 790                 else
 791                         error_unexpected_element(child,child->get_name());
 792         }
 793         return ret;
 794 }
 795
 796 Angle
 797 CanvasParser::parse_angle(xmlpp::Element *element)
 798 {
 799         assert(element->get_name()=="angle");
 800
 801         if(!element->get_children().empty())
 802                 warning(element, strprintf(_("<%s> should not contain anything"),"angle"));
 803
 804         if(!element->get_attribute("value"))
 805         {
 806                 error(element,strprintf(_("<%s> is missing \"value\" attribute"),"angle"));
 807                 return Angle();
 808         }
 809
 810         string val=element->get_attribute("value")->get_value();
 811
 812         return Angle::deg(atof(val.c_str()));
 813 }
 814
 815 ValueBase
 816 CanvasParser::parse_value(xmlpp::Element *element,Canvas::Handle canvas)
 817 {
 818         if(element->get_name()=="real")
 819                 return parse_real(element);
 820         else
 821         if(element->get_name()=="time")
 822                 return parse_time(element,canvas);
 823         else
 824         if(element->get_name()=="integer")
 825                 return parse_integer(element);
 826         else
 827         if(element->get_name()=="string")
 828                 return parse_string(element);
 829         else
 830         if(element->get_name()=="vector")
 831                 return parse_vector(element);
 832         else
 833         if(element->get_name()=="color")
 834                 return parse_color(element);
 835         else
 836         if(element->get_name()=="segment")
 837                 return parse_segment(element);
 838         else
 839         if(element->get_name()=="list")
 840                 return parse_list(element,canvas);
 841         else
 842         if(element->get_name()=="gradient")
 843                 return parse_gradient(element);
 844         else
 845         if(element->get_name()=="bool")
 846                 return parse_bool(element);
 847         else
 848         //if(element->get_name()=="canvas")
 849         //      return parse_canvas(element,canvas,true);       // inline canvas
 850         //else
 851         if(element->get_name()=="angle" || element->get_name()=="degrees" || element->get_name()=="radians" || element->get_name()=="rotations")
 852                 return parse_angle(element);
 853         else
 854         if(element->get_name()=="bline_point")
 855                 return parse_bline_point(element);
 856         else
 857         if(element->get_name()=="canvas")
 858                 return ValueBase(parse_canvas(element,canvas,true));
 859         else
 860         {
 861                 error_unexpected_element(element,element->get_name());
 862         }
 863
 864         return ValueBase();
 865 }
 866
 867
 868
 869
 870 ValueNode_Animated::Handle
 871 CanvasParser::parse_animated(xmlpp::Element *element,Canvas::Handle canvas)
 872 {
 873         assert(element->get_name()=="hermite" || element->get_name()=="animated");
 874
 875         if(!element->get_attribute("type"))
 876         {
 877                 error(element,"Missing attribute \"type\" in <animated>");
 878                 return ValueNode_Animated::Handle();
 879         }
 880
 881         ValueBase::Type type=ValueBase::ident_type(element->get_attribute("type")->get_value());
 882
 883         if(!type)
 884         {
 885                 error(element,"Bad type in <animated>");
 886                 return ValueNode_Animated::Handle();
 887         }
 888
 889         ValueNode_Animated::Handle value_node=ValueNode_Animated::create(type);
 890
 891         if(!value_node)
 892         {
 893                 error(element,strprintf(_("Unable to create <animated> with type \"%s\""),ValueBase::type_local_name(type).c_str()));
 894                 return ValueNode_Animated::Handle();
 895         }
 896
 897         value_node->set_root_canvas(canvas->get_root());
 898
 899         xmlpp::Element::NodeList list = element->get_children();
 900         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 901         {
 902                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 903                 if(!child)
 904                         continue;
 905                 else
 906                 if(child->get_name()=="waypoint")
 907                 {
 908                         if(!child->get_attribute("time"))
 909                         {
 910                                 error(child,_("<waypoint> is missing attribute \"time\""));
 911                                 continue;
 912                         }
 913
 914                         Time time(child->get_attribute("time")->get_value(),canvas->rend_desc().get_frame_rate());
 915
 916
 917                         ValueNode::Handle waypoint_value_node;
 918                         xmlpp::Element::NodeList list = child->get_children();
 919
 920                         if(child->get_attribute("use"))
 921                         {
 922                                 if(!list.empty())
 923                                         warning(child,_("Found \"use\" attribute for <waypoint>, but it wasn't empty. Ignoring contents..."));
 924
 925                                 // the waypoint might look like this, in which case we won't find "mycanvas" in the list of valuenodes, 'cos it's a canvas
 926                                 //
 927                                 //      <animated type="canvas">
 928                                 //        <waypoint time="0s" use="mycanvas"/>
 929                                 //      </animated>
 930                                 if (type==ValueBase::TYPE_CANVAS)
 931                                         waypoint_value_node=ValueNode_Const::create(canvas->surefind_canvas(child->get_attribute("use")->get_value()));
 932                                 else
 933                                         waypoint_value_node=canvas->surefind_value_node(child->get_attribute("use")->get_value());
 934                         }
 935                         else
 936                         {
 937                                 if(child->get_children().empty())
 938                                 {
 939                                         error(child, strprintf(_("<%s> is missing its data"),"waypoint"));
 940                                         continue;
 941                                 }
 942
 943                                 xmlpp::Element::NodeList::iterator iter;
 944
 945                                 // Search for the first non-text XML element
 946                                 for(iter = list.begin(); iter != list.end(); ++iter)
 947                                         if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 948
 949                                 if(iter==list.end())
 950                                 {
 951                                         error(child, strprintf(_("<%s> is missing its data"),"waypoint"));
 952                                         continue;
 953                                 }
 954
 955                                 waypoint_value_node=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
 956
 957                                 /*
 958                                 ValueBase data=parse_value(dynamic_cast<xmlpp::Element*>(*iter),canvas);
 959
 960                                 if(!data.is_valid())
 961                                 {
 962                                         error(child,_("Bad data for <waypoint>"));
 963                                         continue;
 964                                 }
 965                                 */
 966                                 if(!waypoint_value_node)
 967                                 {
 968                                         error(child,_("Bad data for <waypoint>"));
 969                                         continue;
 970                                 }
 971
 972                                 /*! HACK -- This is a temporary fix to help repair some
 973                                 **      weirdness that is currently going on (10-21-2004).
 974                                 **      This short circuits the linking of waypoints,
 975                                 **      a feature which is so obscure that we can get
 976                                 **      away with something like this pretty easily.
 977                                 */
 978                                 waypoint_value_node=waypoint_value_node->clone();
 979
 980                                 // Warn if there is trash after the param value
 981                                 for(iter++; iter != list.end(); ++iter)
 982                                         if(dynamic_cast<xmlpp::Element*>(*iter))
 983                                                 warning((*iter),strprintf(_("Unexpected element <%s> after <waypoint> data, ignoring..."),(*iter)->get_name().c_str()));
 984                         }
 985
 986
 987                         try {
 988                                 ValueNode_Animated::WaypointList::iterator waypoint=value_node->new_waypoint(time,waypoint_value_node);
 989
 990                         if(child->get_attribute("tension"))
 991                         {
 992                                 synfig::String str(child->get_attribute("tension")->get_value());
 993                                 waypoint->set_tension(atof(str.c_str()));
 994                         }
 995                         if(child->get_attribute("temporal-tension"))
 996                         {
 997                                 synfig::String str(child->get_attribute("temporal-tension")->get_value());
 998                                 waypoint->set_time_tension(atof(str.c_str()));
 999                         }
1000                         if(child->get_attribute("continuity"))
1001                         {
1002                                 synfig::String str(child->get_attribute("continuity")->get_value());
1003                                 waypoint->set_continuity(atof(str.c_str()));
1004                         }
1005                         if(child->get_attribute("bias"))
1006                         {
1007                                 synfig::String str(child->get_attribute("bias")->get_value());
1008                                 waypoint->set_bias(atof(str.c_str()));
1009                         }
1010
1011                         if(child->get_attribute("before"))
1012                         {
1013                                 string val=child->get_attribute("before")->get_value();
1014                                 if(val=="halt")
1015                                         waypoint->set_before(INTERPOLATION_HALT);
1016                                 else if(val=="constant")
1017                                         waypoint->set_before(INTERPOLATION_CONSTANT);
1018                                 else if(val=="linear")
1019                                         waypoint->set_before(INTERPOLATION_LINEAR);
1020                                 else if(val=="manual")
1021                                         waypoint->set_before(INTERPOLATION_MANUAL);
1022                                 else if(val=="auto")
1023                                         waypoint->set_before(INTERPOLATION_TCB);
1024                                 else
1025                                         error(child,strprintf(_("\"%s\" not a valid value for attribute \"%s\" in <%s>"),val.c_str(),"before","waypoint"));
1026                         }
1027
1028                         if(child->get_attribute("after"))
1029                         {
1030                                 string val=child->get_attribute("after")->get_value();
1031                                 if(val=="halt")
1032                                         waypoint->set_after(INTERPOLATION_HALT);
1033                                 else if(val=="constant")
1034                                         waypoint->set_after(INTERPOLATION_CONSTANT);
1035                                 else if(val=="linear")
1036                                         waypoint->set_after(INTERPOLATION_LINEAR);
1037                                 else if(val=="manual")
1038                                         waypoint->set_after(INTERPOLATION_MANUAL);
1039                                 else if(val=="auto")
1040                                         waypoint->set_after(INTERPOLATION_TCB);
1041                                 else
1042                                         error(child,strprintf(_("\"%s\" not a valid value for attribute \"%s\" in <%s>"),val.c_str(),"before","waypoint"));
1043                         }
1044                         }
1045                         catch(Exception::BadTime x)
1046                         {
1047                                 warning(child,x.what());
1048                         }
1049                         continue;
1050
1051                 }
1052                 else
1053                         error_unexpected_element(child,child->get_name());
1054         }
1055
1056         // in canvas version 0.1, angles used to wrap, so to get from -179
1057         // degrees to 180 degrees meant a 1 degree change
1058         // in canvas version 0.2 they don't, so that's a 359 degree change
1059
1060         // when loading a version 0.1 canvas, modify constant angle
1061         // waypoints to that they are within 180 degrees of the previous
1062         // waypoint's value
1063         if (type == ValueBase::TYPE_ANGLE)
1064         {
1065                 Canvas::Handle parent = canvas;
1066                 while (!parent->is_root())
1067                         parent = parent->parent();
1068
1069                 if (parent->get_version() == "0.1")
1070                 {
1071                         bool first = true;
1072                         Real angle, prev = 0;
1073                         WaypointList &wl = value_node->waypoint_list();
1074                         for (WaypointList::iterator iter = wl.begin(); iter != wl.end(); iter++)
1075                         {
1076                                 angle = Angle::deg(iter->get_value(iter->get_time()).get(Angle())).get();
1077                                 if (first)
1078                                         first = false;
1079                                 else if (iter->get_value_node()->get_name() == "constant")
1080                                         if (angle - prev > 180)
1081                                         {
1082                                                 while (angle - prev > 180) angle -= 360;
1083                                                 iter->set_value(Angle::deg(angle));
1084                                         }
1085                                         else if (prev - angle > 180)
1086                                         {
1087                                                 while (prev - angle > 180) angle += 360;
1088                                                 iter->set_value(Angle::deg(angle));
1089                                         }
1090                                 prev = angle;
1091                         }
1092                 }
1093         }
1094
1095         value_node->changed();
1096         return value_node;
1097 }
1098
1099 etl::handle<LinkableValueNode>
1100 CanvasParser::parse_linkable_value_node(xmlpp::Element *element,Canvas::Handle canvas)
1101 {
1102         handle<LinkableValueNode> value_node;
1103         ValueBase::Type type;
1104
1105         // Determine the type
1106         if(element->get_attribute("type"))
1107         {
1108                 type=ValueBase::ident_type(element->get_attribute("type")->get_value());
1109
1110                 if(!type)
1111                 {
1112                         error(element,"Bad type in ValueNode");
1113                         return 0;
1114                 }
1115         }
1116         else
1117         {
1118                 error(element,"Missing type in ValueNode");
1119                 return 0;
1120         }
1121
1122         value_node=LinkableValueNode::create(element->get_name(),type);
1123
1124         if(!value_node)
1125         {
1126                 error(element, strprintf(_("Error creating ValueNode <%s> with type '%s'.  Refer to '%s'"),
1127                                                                  element->get_name().c_str(),
1128                                                                  ValueBase::type_local_name(type).c_str(),
1129                                                                  VALUENODE_COMPATIBILITY_URL));
1130                 return 0;
1131         }
1132
1133         if(value_node->get_type()!=type)
1134         {
1135                 error(element,"ValueNode did not accept type");
1136                 return 0;
1137         }
1138
1139         value_node->set_root_canvas(canvas->get_root());
1140
1141         int i;
1142         for(i=0;i<value_node->link_count();i++)
1143         {
1144                 if(element->get_attribute(value_node->link_name(i)))
1145                 try {
1146                         String id(element->get_attribute(value_node->link_name(i))->get_value());
1147
1148                         if(!value_node->set_link(i,
1149                                         canvas->surefind_value_node(
1150                                                 id
1151                                         )
1152                                 )
1153                         ) 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()));
1154                 }
1155                 catch(Exception::IDNotFound)
1156                 {
1157                         error(element,"Unable to resolve "+element->get_attribute(value_node->link_name(i))->get_value());
1158                 }
1159                 catch(Exception::FileNotFound)
1160                 {
1161                         error(element,"Unable to open file referenced in "+element->get_attribute(value_node->link_name(i))->get_value());
1162                 }
1163                 catch(...)
1164                 {
1165                         error(element,strprintf(_("Unknown Exception thrown when referencing ValueNode \"%s\""),
1166                                 element->get_attribute(value_node->link_name(i))->get_value().c_str()));
1167                         throw;
1168                 }
1169         }
1170
1171
1172
1173         xmlpp::Element::NodeList list = element->get_children();
1174         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1175         {
1176                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1177                 try
1178                 {
1179                         if(!child)
1180                                 continue;
1181                         int index=value_node->get_link_index_from_name(child->get_name());
1182
1183                         xmlpp::Element::NodeList list = child->get_children();
1184                         xmlpp::Element::NodeList::iterator iter;
1185
1186                         // Search for the first non-text XML element
1187                         for(iter = list.begin(); iter != list.end(); ++iter)
1188                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
1189
1190                         if(iter==list.end())
1191                         {
1192                                 error(child,_("element is missing its contents"));
1193                                 continue;
1194                         }
1195
1196                         ValueNode::Handle link=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1197
1198                         if(!link)
1199                         {
1200                                 error((*iter),"Parse of ValueNode failed");
1201                         }
1202                         else
1203                         if(!value_node->set_link(index,link))
1204                         {
1205                                 //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_local_name(link->get_type()).c_str(),index));
1206                                 error(element,strprintf(_("Unable to connect value node ('%s' of type '%s') to link %d"),link->get_name().c_str(),ValueBase::type_local_name(link->get_type()).c_str(),index));
1207                         }
1208
1209                         // \todo do a search for more elements and warn if they are found
1210
1211                 }
1212                 catch(Exception::BadLinkName)
1213                 {
1214                         error_unexpected_element(child,child->get_name());
1215                 }
1216                 catch(...)
1217                 {
1218                         error(child,strprintf(_("Unknown Exception thrown when working on element \"%s\""),child->get_name().c_str()));
1219                         throw;
1220                 }
1221         }
1222
1223         return value_node;
1224 }
1225
1226 handle<ValueNode_Composite>
1227 CanvasParser::parse_composite(xmlpp::Element *element,Canvas::Handle canvas)
1228 {
1229         assert(element->get_name()=="composite");
1230
1231         if(!element->get_attribute("type"))
1232         {
1233                 error(element,"Missing attribute \"type\" in <composite>");
1234                 return handle<ValueNode_Composite>();
1235         }
1236
1237         ValueBase::Type type=ValueBase::ident_type(element->get_attribute("type")->get_value());
1238
1239         if(!type)
1240         {
1241                 error(element,"Bad type in <composite>");
1242                 return handle<ValueNode_Composite>();
1243         }
1244
1245         handle<ValueNode_Composite> value_node=ValueNode_Composite::create(type);
1246         handle<ValueNode> c[6];
1247
1248         if(!value_node)
1249         {
1250                 error(element,strprintf(_("Unable to create <composite>")));
1251                 return handle<ValueNode_Composite>();
1252         }
1253
1254         int i;
1255
1256         for(i=0;i<value_node->link_count();i++)
1257         {
1258                 string name=value_node->link_name(i);
1259                 if(c[i])
1260                 {
1261                         error(element,name+" was already defined in <composite>");
1262                         continue;
1263                 }
1264                 if(element->get_attribute(name))
1265                 {
1266                         c[i]=canvas->surefind_value_node(element->get_attribute(name)->get_value());
1267                         if(c[i])
1268                         {
1269                                 if(!value_node->set_link(i,c[i]))
1270                                 {
1271                                         error(element,'"'+name+"\" attribute in <composite> has bad type");
1272                                 }
1273                         }
1274                         else
1275                                 error(element,'"'+name+"\" attribute in <composite> references unknown ID");
1276                 }
1277         }
1278
1279         xmlpp::Element::NodeList list = element->get_children();
1280         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1281         {
1282                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1283                 if(!child)
1284                         continue;
1285
1286                 string child_name = child->get_name();
1287                 for(i=0;i<value_node->link_count();i++)
1288                 {
1289                         string name=value_node->link_name(i);
1290                         int old_index = -1;
1291
1292                         if (child_name.size() == 2 && child_name[0] == 'c')
1293                                 old_index = child_name[1] - '1';
1294
1295                         if ((old_index != -1 && old_index == i) ||
1296                                 (old_index == -1 && value_node->get_link_index_from_name(child_name) == i))
1297                         {
1298                                 if(c[i])
1299                                 {
1300                                         error(child,child_name+" was already defined in <composite>");
1301                                         break;
1302                                 }
1303
1304                                 xmlpp::Element::NodeList list = child->get_children();
1305                                 xmlpp::Element::NodeList::iterator iter;
1306
1307                                 // Search for the first non-text XML element
1308                                 for(iter = list.begin(); iter != list.end(); ++iter)
1309                                         if(dynamic_cast<xmlpp::Element*>(*iter)) break;
1310
1311                                 if(iter==list.end())
1312                                 {
1313                                         error(child,strprintf(_("<%s> is missing its contents"),child_name.c_str()));
1314                                         break;
1315                                 }
1316
1317                                 c[i]=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1318
1319                                 if(!c[i])
1320                                 {
1321                                         error((*iter),"Parse of "+child_name+" ValueNode failed");
1322                                         break;
1323                                 }
1324
1325                                 if(!value_node->set_link(i,c[i]))
1326                                 {
1327                                         error(child,strprintf(_("<%s> has a bad value"),child_name.c_str()));
1328                                         break;
1329                                 }
1330
1331                                 // \todo do a search for more elements and warn if they are found
1332                                 break;
1333                         }
1334                 }
1335                 // somewhat of a hack, but it works
1336                 if(i==value_node->link_count()) error_unexpected_element(child,child_name);
1337         }
1338
1339         switch(value_node->link_count())
1340         {
1341         case 1:
1342                 if(!value_node->get_link(0))
1343                 {
1344                         error(element,"<composite> is missing parameters");
1345                         return handle<ValueNode_Composite>();
1346                 }
1347                 break;
1348         case 2:
1349                 if(!value_node->get_link(0) ||!value_node->get_link(1))
1350                 {
1351                         error(element,"<composite> is missing parameters");
1352                         return handle<ValueNode_Composite>();
1353                 }
1354                 break;
1355         case 3:
1356                 if(!value_node->get_link(0) ||!value_node->get_link(1) ||!value_node->get_link(2))
1357                 {
1358                         error(element,"<composite> is missing parameters");
1359                         return handle<ValueNode_Composite>();
1360                 }
1361                 break;
1362         case 4:
1363                 if(!value_node->get_link(0) ||!value_node->get_link(1) ||!value_node->get_link(2) ||!value_node->get_link(3))
1364                 {
1365                         error(element,"<composite> is missing parameters");
1366                         return handle<ValueNode_Composite>();
1367                 }
1368                 break;
1369     }
1370         return value_node;
1371 }
1372
1373 // This will also parse a bline
1374 handle<ValueNode_DynamicList>
1375 CanvasParser::parse_dynamic_list(xmlpp::Element *element,Canvas::Handle canvas)
1376 {
1377         assert(element->get_name()=="dynamic_list" || element->get_name()=="bline");
1378
1379         const float fps(canvas?canvas->rend_desc().get_frame_rate():0);
1380
1381         if(!element->get_attribute("type"))
1382         {
1383                 error(element,"Missing attribute \"type\" in <dynamic_list>");
1384                 return handle<ValueNode_DynamicList>();
1385         }
1386
1387         ValueBase::Type type=ValueBase::ident_type(element->get_attribute("type")->get_value());
1388
1389         if(!type)
1390         {
1391                 error(element,"Bad type in <dynamic_list>");
1392                 return handle<ValueNode_DynamicList>();
1393         }
1394
1395         handle<ValueNode_DynamicList> value_node;
1396         handle<ValueNode_BLine> bline_value_node;
1397
1398         if(element->get_name()=="bline")
1399         {
1400                 value_node=bline_value_node=ValueNode_BLine::create();
1401                 if(element->get_attribute("loop"))
1402                 {
1403                         String loop=element->get_attribute("loop")->get_value();
1404                         if(loop=="true" || loop=="1" || loop=="TRUE" || loop=="True")
1405                                 bline_value_node->set_loop(true);
1406                         else
1407                                 bline_value_node->set_loop(false);
1408                 }
1409
1410         }
1411         else
1412                 value_node=ValueNode_DynamicList::create(type);
1413
1414         if(!value_node)
1415         {
1416                 error(element,strprintf(_("Unable to create <dynamic_list>")));
1417                 return handle<ValueNode_DynamicList>();
1418         }
1419
1420         value_node->set_root_canvas(canvas->get_root());
1421
1422         xmlpp::Element::NodeList list = element->get_children();
1423         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1424         {
1425                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1426                 if(!child)
1427                         continue;
1428                 else
1429                 if(child->get_name()=="entry")
1430                 {
1431                         ValueNode_DynamicList::ListEntry list_entry;
1432
1433                         // Parse begin/end waypoints
1434                         {
1435                                 typedef synfig::ValueNode_DynamicList::ListEntry::Activepoint Activepoint;
1436                                 typedef synfig::ValueNode_DynamicList::ListEntry::ActivepointList ActivepointList;
1437
1438                                 String begin_sequence;
1439                                 String end_sequence;
1440
1441                                 ActivepointList &timing_info(list_entry.timing_info);
1442
1443                                 if(child->get_attribute("begin"))
1444                                         begin_sequence=child->get_attribute("begin")->get_value();
1445
1446                                 if(child->get_attribute("on"))
1447                                         begin_sequence=child->get_attribute("on")->get_value();
1448
1449                                 if(child->get_attribute("end"))
1450                                         end_sequence=child->get_attribute("end")->get_value();
1451
1452                                 if(child->get_attribute("off"))
1453                                         end_sequence=child->get_attribute("off")->get_value();
1454
1455                                 // clear out any auto-start
1456                                 if(!begin_sequence.empty())
1457                                         timing_info.clear();
1458
1459                                 //! \optimize
1460                                 while(!begin_sequence.empty())
1461                                 {
1462                                         String::iterator iter(find(begin_sequence.begin(),begin_sequence.end(),','));
1463                                         String timecode(begin_sequence.begin(), iter);
1464                                         int priority=0;
1465
1466                                         // skip whitespace before checking for a priority
1467                                         while (isspace(timecode[0]))
1468                                                 timecode=timecode.substr(1);
1469
1470                                         // If there is a priority, then grab it and remove
1471                                         // it from the timecode
1472                                         if(timecode[0]=='p')
1473                                         {
1474                                                 //priority=timecode[1]-'0';
1475                                                 //timecode=String(timecode.begin()+3,timecode.end());
1476                                                 int space=timecode.find_first_of(' ');
1477                                                 priority=atoi(String(timecode,1,space-1).c_str());
1478                                                 timecode=String(timecode.begin()+space+1,timecode.end());
1479                                                 //synfig::info("priority: %d      timecode: %s",priority,timecode.c_str());
1480                                         }
1481
1482                                         timing_info.push_back(
1483                                                 Activepoint(
1484                                                         Time(
1485                                                                 timecode,
1486                                                                 fps
1487                                                         ),
1488                                                         true,   // Mark as a "on" activepoint
1489                                                         priority
1490                                                 )
1491                                         );
1492
1493                                         if(iter==begin_sequence.end())
1494                                                 begin_sequence.clear();
1495                                         else
1496                                                 begin_sequence=String(iter+1,begin_sequence.end());
1497                                 }
1498
1499                                 //! \optimize
1500                                 while(!end_sequence.empty())
1501                                 {
1502                                         String::iterator iter(find(end_sequence.begin(),end_sequence.end(),','));
1503                                         String timecode(end_sequence.begin(),   iter);
1504                                         int priority=0;
1505
1506                                         // skip whitespace before checking for a priority
1507                                         while (isspace(timecode[0]))
1508                                                 timecode=timecode.substr(1);
1509
1510                                         // If there is a priority, then grab it and remove
1511                                         // it from the timecode
1512                                         if(timecode[0]=='p')
1513                                         {
1514                                                 //priority=timecode[1]-'0';
1515                                                 //timecode=String(timecode.begin()+3,timecode.end());
1516                                                 int space=timecode.find_first_of(' ');
1517                                                 priority=atoi(String(timecode,1,space-1).c_str());
1518                                                 timecode=String(timecode.begin()+space+1,timecode.end());
1519                                                 //synfig::info("priority: %d      timecode: %s",priority,timecode.c_str());
1520                                         }
1521
1522                                         timing_info.push_back(
1523                                                 Activepoint(
1524                                                         Time(
1525                                                                 timecode,
1526                                                                 fps
1527                                                         ),
1528                                                         false,  // Mark as a "off" activepoint
1529                                                         priority
1530                                                 )
1531                                         );
1532                                         if(iter==end_sequence.end())
1533                                                 end_sequence.clear();
1534                                         else
1535                                                 end_sequence=String(iter+1,end_sequence.end());
1536                                 }
1537
1538                                 timing_info.sort();
1539                         }
1540
1541                         if(child->get_attribute("use"))
1542                         {
1543                                 // \todo does this need to be able to read 'use="canvas"', like waypoints can now?  (see 'surefind_canvas' in this file)
1544                                 string id=child->get_attribute("use")->get_value();
1545                                 try
1546                                 {
1547                                         list_entry.value_node=canvas->surefind_value_node(id);
1548                                 }
1549                                 catch(Exception::IDNotFound)
1550                                 {
1551                                         error(child,"\"use\" attribute in <entry> references unknown ID -- "+id);
1552                                         continue;
1553                                 }
1554                         }
1555                         else
1556                         {
1557                                 xmlpp::Element::NodeList list = child->get_children();
1558                                 xmlpp::Element::NodeList::iterator iter;
1559
1560                                 // Search for the first non-text XML element
1561                                 for(iter = list.begin(); iter != list.end(); ++iter)
1562                                         if(dynamic_cast<xmlpp::Element*>(*iter)) break;
1563
1564                                 if(iter==list.end())
1565                                 {
1566                                         error(child,strprintf(_("<entry> is missing its contents or missing \"use\" element")));
1567                                         continue;
1568                                 }
1569
1570                                 list_entry.value_node=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1571
1572                                 if(!list_entry.value_node)
1573                                         error((*iter),"Parse of ValueNode failed");
1574
1575                                 // \todo do a search for more elements and warn if they are found
1576
1577                         }
1578
1579                         value_node->add(list_entry);
1580                         value_node->set_link(value_node->link_count()-1,list_entry.value_node);
1581                 }
1582                 else
1583                         error_unexpected_element(child,child->get_name());
1584         }
1585         return value_node;
1586 }
1587
1588 handle<ValueNode>
1589 CanvasParser::parse_value_node(xmlpp::Element *element,Canvas::Handle canvas)
1590 {
1591         handle<ValueNode> value_node;
1592         assert(element);
1593
1594         GUID guid;
1595
1596         if(element->get_attribute("guid"))
1597         {
1598                 guid=GUID(element->get_attribute("guid")->get_value())^canvas->get_root()->get_guid();
1599                 value_node=guid_cast<ValueNode>(guid);
1600                 if(value_node)
1601                         return value_node;
1602         }
1603
1604         // If ValueBase::ident_type() recognizes the name, then we know it's a ValueBase
1605         if(element->get_name()!="canvas" && ValueBase::ident_type(element->get_name()))
1606         {
1607                 ValueBase data=parse_value(element,canvas);
1608
1609                 if(!data.is_valid())
1610                 {
1611                         error(element,strprintf(_("Bad data in <%s>"),element->get_name().c_str()));
1612                         return value_node;
1613                 }
1614
1615                 // We want to convert this ValueBase into a
1616                 // ValueNode_Const. That way, we can treat the
1617                 // ID like any other Datanode. Think of this
1618                 // as a shorthand for creating constant ValueNodes.
1619
1620                 value_node=ValueNode_Const::create(data);
1621         }
1622         else
1623         if(element->get_name()=="hermite" || element->get_name()=="animated")
1624                 value_node=parse_animated(element,canvas);
1625         else
1626         if(element->get_name()=="composite")
1627                 value_node=parse_composite(element,canvas);
1628         else
1629         if(element->get_name()=="dynamic_list")
1630                 value_node=parse_dynamic_list(element,canvas);
1631         else
1632         if(element->get_name()=="bline") // This is not a typo. The dynamic list parser will parse a bline.
1633                 value_node=parse_dynamic_list(element,canvas);
1634         else
1635         if(LinkableValueNode::book().count(element->get_name()))
1636         {
1637                 value_node=parse_linkable_value_node(element,canvas);
1638                 if (!value_node) value_node = PlaceholderValueNode::create();
1639         }
1640         else
1641         if(element->get_name()=="canvas")
1642                 value_node=ValueNode_Const::create(parse_canvas(element,canvas,true));
1643         else
1644         {
1645                 error_unexpected_element(element,element->get_name());
1646                 error(element, strprintf(_("Expected a ValueNode.  Refer to '%s'"),
1647                                                                  VALUENODE_COMPATIBILITY_URL));
1648                 value_node=PlaceholderValueNode::create();
1649         }
1650
1651         value_node->set_root_canvas(canvas->get_root());
1652
1653         // If we were successful, and our element has
1654         // an ID attribute, go ahead and add it to the
1655         // value_node list
1656         if(value_node && element->get_attribute("id"))
1657         {
1658                 string id=element->get_attribute("id")->get_value();
1659
1660                 //value_node->set_id(id);
1661
1662                 // If there is already a value_node in the list
1663                 // with the same ID, then that is an error
1664                 try { canvas->add_value_node(value_node,id); }
1665                 catch(Exception::BadLinkName)
1666                 {
1667                         warning(element,strprintf(_("Bad ID \"%s\""),id.c_str()));
1668                         return value_node;
1669                 }
1670                 catch(Exception::IDAlreadyExists)
1671                 {
1672                         error(element,strprintf(_("Duplicate ID \"%s\""),id.c_str()));
1673                         return value_node;
1674                 }
1675                 catch(...)
1676                 {
1677                         error(element,strprintf(_("Unknown Exception thrown when adding ValueNode \"%s\""),id.c_str()));
1678                         throw;
1679                 }
1680         }
1681         value_node->set_guid(guid);
1682         return value_node;
1683 }
1684
1685 void
1686 CanvasParser::parse_canvas_defs(xmlpp::Element *element,Canvas::Handle canvas)
1687 {
1688         assert(element->get_name()=="defs");
1689         xmlpp::Element::NodeList list = element->get_children();
1690         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1691         {
1692                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1693                 if(!child)
1694                         continue;
1695                 else
1696                 if(child->get_name()=="canvas")
1697                         parse_canvas(child, canvas);
1698                 else
1699                         parse_value_node(child,canvas);
1700         }
1701 }
1702
1703 Layer::Handle
1704 CanvasParser::parse_layer(xmlpp::Element *element,Canvas::Handle canvas)
1705 {
1706
1707         assert(element->get_name()=="layer");
1708         Layer::Handle layer;
1709
1710         if(!element->get_attribute("type"))
1711         {
1712                 error(element,_("Missing \"type\" attribute to \"layer\" element"));
1713                 return Layer::Handle();
1714         }
1715
1716         layer=Layer::create(element->get_attribute("type")->get_value());
1717         layer->set_canvas(canvas);
1718
1719         if(element->get_attribute("group"))
1720         {
1721                 layer->add_to_group(
1722                         element->get_attribute("group")->get_value()
1723                 );
1724         }
1725
1726         // Handle the version attribute
1727         if(element->get_attribute("version"))
1728         {
1729                 String version(element->get_attribute("version")->get_value());
1730                 if(version>layer->get_version())
1731                         warning(element,_("Installed layer version is smaller than layer version in file"));
1732                 if(version!=layer->get_version())
1733                         layer->set_version(version);
1734         }
1735
1736         // Handle the description
1737         if(element->get_attribute("desc"))
1738                 layer->set_description(element->get_attribute("desc")->get_value());
1739
1740         if(element->get_attribute("active"))
1741                 layer->set_active(element->get_attribute("active")->get_value()=="false"?false:true);
1742
1743         xmlpp::Element::NodeList list = element->get_children();
1744         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1745         {
1746                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1747                 if(!child)
1748                         continue;
1749                 else
1750                 if(child->get_name()=="name")
1751                         warning(child,_("<name> entry for <layer> is not yet supported. Ignoring..."));
1752                 else
1753                 if(child->get_name()=="desc")
1754                         warning(child,_("<desc> entry for <layer> is not yet supported. Ignoring..."));
1755                 else
1756                 if(child->get_name()=="param")
1757                 {
1758                         xmlpp::Element::NodeList list = child->get_children();
1759
1760                         if(!child->get_attribute("name"))
1761                         {
1762                                 error(child,_("Missing \"name\" attribute for <param>."));
1763                                 continue;
1764                         }
1765
1766                         String param_name=child->get_attribute("name")->get_value();
1767
1768                         if(child->get_attribute("use"))
1769                         {
1770                                 // If the "use" attribute is used, then the
1771                                 // element should be empty. Warn the user if
1772                                 // we find otherwise.
1773                                 if(!list.empty())
1774                                         warning(child,_("Found \"use\" attribute for <param>, but it wasn't empty. Ignoring contents..."));
1775
1776                                 String str=     child->get_attribute("use")->get_value();
1777
1778                                 if(layer->get_param(param_name).get_type()==ValueBase::TYPE_CANVAS)
1779                                 {
1780                                         if(!layer->set_param(param_name,canvas->surefind_canvas(str)))
1781                                                 error((*iter),_("Layer rejected canvas link"));
1782                                 }
1783                                 else
1784                                 try
1785                                 {
1786                                         handle<ValueNode> value_node=canvas->surefind_value_node(str);
1787
1788                                         // Assign the value_node to the dynamic parameter list
1789                                         layer->connect_dynamic_param(param_name,value_node);
1790                         }
1791                                 catch(Exception::IDNotFound)
1792                                 {
1793                                         error(child,strprintf(_("Unknown ID (%s) referenced in <param>"),str.c_str()));
1794                                 }
1795
1796                                 continue;
1797                         }
1798
1799                         xmlpp::Element::NodeList::iterator iter;
1800
1801                         // Search for the first non-text XML element
1802                         for(iter = list.begin(); iter != list.end(); ++iter)
1803                                 if(dynamic_cast<xmlpp::Element*>(*iter))
1804                                         break;
1805                                 //if(!(!dynamic_cast<xmlpp::Element*>(*iter) && (*iter)->get_name()=="text"||(*iter)->get_name()=="comment"   )) break;
1806
1807                         if(iter==list.end())
1808                         {
1809                                 error(child,_("<param> is either missing its contents, or missing a \"use\" attribute."));
1810                                 continue;
1811                         }
1812
1813                         // If we recognize the element name as a
1814                         // ValueBase, then treat is at one
1815                         if(/*(*iter)->get_name()!="canvas" && */ValueBase::ident_type((*iter)->get_name()) && !dynamic_cast<xmlpp::Element*>(*iter)->get_attribute("guid"))
1816                         {
1817                                 ValueBase data=parse_value(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1818
1819                                 if(!data.is_valid())
1820                                 {
1821                                         error((*iter),_("Bad data for <param>"));
1822                                         continue;
1823                                 }
1824
1825                                 // Set the layer's parameter, and make sure that
1826                                 // the layer liked it
1827                                 if(!layer->set_param(param_name,data))
1828                                 {
1829                                         warning((*iter),_("Layer rejected value for <param>"));
1830                                         continue;
1831                                 }
1832                         }
1833                         else    // ... otherwise, we assume that it is a ValueNode
1834                         {
1835                                 handle<ValueNode> value_node=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1836
1837                                 if(!value_node)
1838                                 {
1839                                         error((*iter),_("Bad data for <param>"));
1840                                         continue;
1841                                 }
1842
1843                                 // Assign the value_node to the dynamic parameter list
1844                                 layer->connect_dynamic_param(param_name,value_node);
1845                         }
1846
1847                         // Warn if there is trash after the param value
1848                         for(iter++; iter != list.end(); ++iter)
1849                                 if(dynamic_cast<xmlpp::Element*>(*iter))
1850                                         warning((*iter),strprintf(_("Unexpected element <%s> after <param> data, ignoring..."),(*iter)->get_name().c_str()));
1851                         continue;
1852                 }
1853                 else
1854                         error_unexpected_element(child,child->get_name());
1855         }
1856
1857         layer->reset_version();
1858         return layer;
1859 }
1860
1861 Canvas::Handle
1862 CanvasParser::parse_canvas(xmlpp::Element *element,Canvas::Handle parent,bool inline_, String filename)
1863 {
1864
1865         if(element->get_name()!="canvas")
1866         {
1867                 error_unexpected_element(element,element->get_name(),"canvas");
1868                 return Canvas::Handle();
1869         }
1870         Canvas::Handle canvas;
1871
1872
1873
1874         if(parent && (element->get_attribute("id") || inline_))
1875         {
1876                 if(inline_)
1877                 {
1878                         canvas=Canvas::create_inline(parent);
1879                 }
1880                 else
1881                 {
1882                         try
1883                         {
1884                                 canvas=parent->find_canvas(element->get_attribute("id")->get_value());
1885                         }
1886                         catch(...)
1887                         {
1888                                 canvas=parent->new_child_canvas(element->get_attribute("id")->get_value());
1889                         }
1890                 }
1891                 canvas->rend_desc().clear_flags();
1892         }
1893         else
1894         {
1895                 canvas=Canvas::create();
1896                 if(filename=="/dev/stdin")
1897                         canvas->set_file_name("./stdin.sif");
1898                 else
1899                         canvas->set_file_name(filename);
1900                 canvas->rend_desc().clear_flags();
1901         }
1902
1903         if(element->get_attribute("guid"))
1904         {
1905                 GUID guid(element->get_attribute("guid")->get_value());
1906                 if(guid_cast<Canvas>(guid))
1907                         return guid_cast<Canvas>(guid);
1908                 else
1909                         canvas->set_guid(guid);
1910         }
1911
1912         if(element->get_attribute("version"))
1913                 canvas->set_version(element->get_attribute("version")->get_value());
1914
1915         if(element->get_attribute("width"))
1916                 canvas->rend_desc().set_w(atoi(element->get_attribute("width")->get_value().c_str()));
1917
1918         if(element->get_attribute("height"))
1919                 canvas->rend_desc().set_h(atoi(element->get_attribute("height")->get_value().c_str()));
1920
1921         if(element->get_attribute("xres"))
1922                 canvas->rend_desc().set_x_res(atof(element->get_attribute("xres")->get_value().c_str()));
1923
1924         if(element->get_attribute("yres"))
1925                 canvas->rend_desc().set_y_res(atof(element->get_attribute("yres")->get_value().c_str()));
1926
1927
1928         if(element->get_attribute("fps"))
1929                 canvas->rend_desc().set_frame_rate(atof(element->get_attribute("fps")->get_value().c_str()));
1930
1931         if(element->get_attribute("start-time"))
1932                 canvas->rend_desc().set_time_start(Time(element->get_attribute("start-time")->get_value(),canvas->rend_desc().get_frame_rate()));
1933
1934         if(element->get_attribute("begin-time"))
1935                 canvas->rend_desc().set_time_start(Time(element->get_attribute("begin-time")->get_value(),canvas->rend_desc().get_frame_rate()));
1936
1937         if(element->get_attribute("end-time"))
1938                 canvas->rend_desc().set_time_end(Time(element->get_attribute("end-time")->get_value(),canvas->rend_desc().get_frame_rate()));
1939
1940         if(element->get_attribute("antialias"))
1941                 canvas->rend_desc().set_antialias(atoi(element->get_attribute("antialias")->get_value().c_str()));
1942
1943         if(element->get_attribute("view-box"))
1944         {
1945                 string values=element->get_attribute("view-box")->get_value();
1946                 Vector
1947                         tl,
1948                         br;
1949                 tl[0]=atof(string(values.data(),values.find(' ')).c_str());
1950                 values=string(values.begin()+values.find(' ')+1,values.end());
1951                 tl[1]=atof(string(values.data(),values.find(' ')).c_str());
1952                 values=string(values.begin()+values.find(' ')+1,values.end());
1953                 br[0]=atof(string(values.data(),values.find(' ')).c_str());
1954                 values=string(values.begin()+values.find(' ')+1,values.end());
1955                 br[1]=atof(values.c_str());
1956
1957                 canvas->rend_desc().set_tl(tl);
1958                 canvas->rend_desc().set_br(br);
1959         }
1960
1961         if(element->get_attribute("bgcolor"))
1962         {
1963                 string values=element->get_attribute("bgcolor")->get_value();
1964                 Color bg;
1965
1966                 bg.set_r(atof(string(values.data(),values.find(' ')).c_str()));
1967                 values=string(values.begin()+values.find(' ')+1,values.end());
1968
1969                 bg.set_g(atof(string(values.data(),values.find(' ')).c_str()));
1970                 values=string(values.begin()+values.find(' ')+1,values.end());
1971
1972                 bg.set_b(atof(string(values.data(),values.find(' ')).c_str()));
1973                 values=string(values.begin()+values.find(' ')+1,values.end());
1974
1975                 bg.set_a(atof(values.c_str()));
1976
1977                 canvas->rend_desc().set_bg_color(bg);
1978         }
1979
1980         if(element->get_attribute("focus"))
1981         {
1982                 string values=element->get_attribute("focus")->get_value();
1983                 Vector focus;
1984
1985                 focus[0]=atof(string(values.data(),values.find(' ')).c_str());
1986                 values=string(values.begin()+values.find(' ')+1,values.end());
1987                 focus[1]=atof(values.c_str());
1988
1989                 canvas->rend_desc().set_focus(focus);
1990         }
1991
1992         canvas->rend_desc().set_flags(RendDesc::PX_ASPECT|RendDesc::IM_SPAN);
1993
1994         xmlpp::Element::NodeList list = element->get_children();
1995         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1996         {
1997                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1998                 if(child)
1999                 {
2000                         if(child->get_name()=="defs")
2001                         {
2002                                 if(canvas->is_inline())
2003                                         error(child,_("Inline canvas cannot have a <defs> section"));
2004                                 parse_canvas_defs(child, canvas);
2005                         }
2006                         else
2007                         if(child->get_name()=="keyframe")
2008                         {
2009                                 if(canvas->is_inline())
2010                                 {
2011                                         warning(child,_("Inline canvas cannot have keyframes"));
2012                                         continue;
2013                                 }
2014
2015                                 canvas->keyframe_list().add(parse_keyframe(child,canvas));
2016                                 canvas->keyframe_list().sync();
2017                         }
2018                         else
2019                         if(child->get_name()=="meta")
2020                         {
2021                                 if(canvas->is_inline())
2022                                 {
2023                                         warning(child,_("Inline canvases cannot have metadata"));
2024                                         continue;
2025                                 }
2026
2027                                 String name,content;
2028
2029                                 if(!child->get_attribute("name"))
2030                                 {
2031                                         warning(child,_("<meta> must have a name"));
2032                                         continue;
2033                                 }
2034
2035                                 if(!child->get_attribute("content"))
2036                                 {
2037                                         warning(child,_("<meta> must have content"));
2038                                         continue;
2039                                 }
2040
2041                                 canvas->set_meta_data(child->get_attribute("name")->get_value(),child->get_attribute("content")->get_value());
2042                         }
2043                         else if(child->get_name()=="name")
2044                         {
2045                                 xmlpp::Element::NodeList list = child->get_children();
2046
2047                                 // If we don't have any name, warn
2048                                 if(list.empty())
2049                                         warning(child,_("blank \"name\" entity"));
2050
2051                                 string tmp;
2052                                 for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
2053                                         if(dynamic_cast<xmlpp::TextNode*>(*iter))tmp+=dynamic_cast<xmlpp::TextNode*>(*iter)->get_content();
2054                                 canvas->set_name(tmp);
2055                         }
2056                         else
2057                         if(child->get_name()=="desc")
2058                         {
2059
2060                                 xmlpp::Element::NodeList list = child->get_children();
2061
2062                                 // If we don't have any description, warn
2063                                 if(list.empty())
2064                                         warning(child,_("blank \"desc\" entity"));
2065
2066                                 string tmp;
2067                                 for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
2068                                         if(dynamic_cast<xmlpp::TextNode*>(*iter))tmp+=dynamic_cast<xmlpp::TextNode*>(*iter)->get_content();
2069                                 canvas->set_description(tmp);
2070                         }
2071                         else
2072                         if(child->get_name()=="author")
2073                         {
2074
2075                                 xmlpp::Element::NodeList list = child->get_children();
2076
2077                                 // If we don't have any description, warn
2078                                 if(list.empty())
2079                                         warning(child,_("blank \"author\" entity"));
2080
2081                                 string tmp;
2082                                 for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
2083                                         if(dynamic_cast<xmlpp::TextNode*>(*iter))tmp+=dynamic_cast<xmlpp::TextNode*>(*iter)->get_content();
2084                                 canvas->set_author(tmp);
2085                         }
2086                         else
2087                         if(child->get_name()=="layer")
2088                         {
2089                                 //if(canvas->is_inline())
2090                                 //      canvas->push_front(parse_layer(child,canvas->parent()));
2091                                 //else
2092                                         canvas->push_front(parse_layer(child,canvas));
2093                         }
2094                         else
2095                                 error_unexpected_element(child,child->get_name());
2096                 }
2097 //              else
2098 //              if((child->get_name()=="text"||child->get_name()=="comment") && child->has_child_text())
2099 //                      continue;
2100         }
2101
2102         if(canvas->value_node_list().placeholder_count())
2103         {
2104                 String nodes;
2105                 for (ValueNodeList::const_iterator iter = canvas->value_node_list().begin(); iter != canvas->value_node_list().end(); iter++)
2106                         if(PlaceholderValueNode::Handle::cast_dynamic(*iter))
2107                         {
2108                                 if (nodes != "") nodes += ", ";
2109                                 nodes += "'" + (*iter)->get_id() + "'";
2110                         }
2111                 error(element,strprintf(_("Canvas '%s' has undefined %s: %s"),
2112                                                                 canvas->get_id().c_str(),
2113                                                                 canvas->value_node_list().placeholder_count() == 1 ? _("ValueNode") : _("ValueNodes"),
2114                                                                 nodes.c_str()));
2115         }
2116
2117         canvas->set_version(CURRENT_CANVAS_VERSION);
2118         return canvas;
2119 }
2120
2121 Canvas::Handle
2122 CanvasParser::parse_from_file(const String &file)
2123 {
2124         return parse_from_file_as(file,file);
2125 }
2126
2127 Canvas::Handle
2128 CanvasParser::parse_from_file_as(const String &file_,const String &as_)
2129 {
2130         try
2131         {
2132         ChangeLocale change_locale(LC_NUMERIC, "C");
2133                 String file(unix_to_local_path(file_));
2134                 String as(unix_to_local_path(as_));
2135
2136                 if(get_open_canvas_map().count(etl::absolute_path(as)))
2137                         return get_open_canvas_map()[etl::absolute_path(as)];
2138
2139                 filename=as;
2140                 total_warnings_=0;
2141                 xmlpp::DomParser parser(file);
2142                 if(parser)
2143                 {
2144                         Canvas::Handle canvas(parse_canvas(parser.get_document()->get_root_node(),0,false,as));
2145                         get_open_canvas_map()[etl::absolute_path(as)]=canvas;
2146                         canvas->signal_deleted().connect(sigc::bind(sigc::ptr_fun(_remove_from_open_canvas_map),canvas.get()));
2147                         canvas->signal_file_name_changed().connect(sigc::bind(sigc::ptr_fun(_canvas_file_name_changed),canvas.get()));
2148
2149
2150
2151                         const ValueNodeList& value_node_list(canvas->value_node_list());
2152
2153                         again:
2154                         ValueNodeList::const_iterator iter;
2155                         for(iter=value_node_list.begin();iter!=value_node_list.end();++iter)
2156                         {
2157                                 ValueNode::Handle value_node(*iter);
2158                                 if(value_node->is_exported() && value_node->get_id().find("Unnamed")==0)
2159                                 {
2160                                         canvas->remove_value_node(value_node);
2161                                         goto again;
2162                                 }
2163                         }
2164
2165                         return canvas;
2166                 }
2167         }
2168         catch(Exception::BadLinkName) { synfig::error("BadLinkName Thrown"); }
2169         catch(Exception::BadType) { synfig::error("BadType Thrown"); }
2170         catch(Exception::FileNotFound) { synfig::error("FileNotFound Thrown"); }
2171         catch(Exception::IDNotFound) { synfig::error("IDNotFound Thrown"); }
2172         catch(Exception::IDAlreadyExists) { synfig::error("IDAlreadyExists Thrown"); }
2173         catch(const std::exception& ex)
2174         {
2175                 synfig::error("Standard Exception: "+String(ex.what()));
2176                 return Canvas::Handle();
2177         }
2178         catch(const String& str)
2179         {
2180                 cerr<<str<<endl;
2181                 //      synfig::error(str);
2182                 return Canvas::Handle();
2183         }
2184         return Canvas::Handle();
2185 }
2186
2187 Canvas::Handle
2188 CanvasParser::parse_from_string(const String &data)
2189 {
2190         try
2191         {
2192         ChangeLocale change_locale(LC_NUMERIC, "C");
2193                 filename=_("<INTERNAL>");
2194                 total_warnings_=0;
2195                 xmlpp::DomParser parser;
2196                 parser.parse_memory(data);
2197                 xmlpp::Element *root=parser.get_document()->get_root_node();
2198                 if(parser)
2199                 {
2200                         Canvas::Handle canvas(parse_canvas(root));
2201                         canvas->signal_deleted().connect(sigc::bind(sigc::ptr_fun(_remove_from_open_canvas_map),canvas.get()));
2202                         canvas->signal_file_name_changed().connect(sigc::bind(sigc::ptr_fun(_canvas_file_name_changed),canvas.get()));
2203
2204                         const ValueNodeList& value_node_list(canvas->value_node_list());
2205                         again:
2206                         ValueNodeList::const_iterator iter;
2207                         for(iter=value_node_list.begin();iter!=value_node_list.end();++iter)
2208                         {
2209                                 ValueNode::Handle value_node(*iter);
2210                                 if(value_node->is_exported() && value_node->get_id().find("Unnamed")==0)
2211                                 {
2212                                         canvas->remove_value_node(value_node);
2213                                         goto again;
2214                                 }
2215                         }
2216
2217                         return canvas;
2218                 }
2219         }
2220         catch(Exception::BadLinkName) { synfig::error("BadLinkName Thrown"); }
2221         catch(Exception::BadType) { synfig::error("BadType Thrown"); }
2222         catch(Exception::FileNotFound) { synfig::error("FileNotFound Thrown"); }
2223         catch(Exception::IDNotFound) { synfig::error("IDNotFound Thrown"); }
2224         catch(Exception::IDAlreadyExists) { synfig::error("IDAlreadyExists Thrown"); }
2225         catch(const std::exception& ex)
2226         {
2227                 synfig::error("Standard Exception: "+String(ex.what()));
2228                 return Canvas::Handle();
2229         }
2230         catch(const String& str)
2231         {
2232                 cerr<<str<<endl;
2233                 //      synfig::error(str);
2234                 return Canvas::Handle();
2235         }
2236         return Canvas::Handle();
2237 }