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

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file loadcanvas.cpp
   3 **      \brief writeme
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
   9 **
  10 **      This package is free software; you can redistribute it and/or
  11 **      modify it under the terms of the GNU General Public License as
  12 **      published by the Free Software Foundation; either version 2 of
  13 **      the License, or (at your option) any later version.
  14 **
  15 **      This package is distributed in the hope that it will be useful,
  16 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18 **      General Public License for more details.
  19 **      \endlegal
  20 */
  21 /* ========================================================================= */
  22
  23 /* === H E A D E R S ======================================================= */
  24
  25 #ifdef USING_PCH
  26 #       include "pch.h"
  27 #else
  28 #ifdef HAVE_CONFIG_H
  29 #       include <config.h>
  30 #endif
  31
  32 #include <cstdlib>
  33 #include <cstdio>
  34 #include <cstring>
  35 #include <ETL/stringf>
  36 #include <libxml++/libxml++.h>
  37 #include <vector>
  38 #include <stdexcept>
  39 #include <iostream>
  40
  41 #include "loadcanvas.h"
  42 #include "valuenode.h"
  43 #include "valuenode_subtract.h"
  44 #include "valuenode_animated.h"
  45 #include "valuenode_composite.h"
  46 #include "valuenode_const.h"
  47 #include "valuenode_linear.h"
  48 #include "valuenode_dynamiclist.h"
  49 #include "valuenode_reference.h"
  50 #include "valuenode_scale.h"
  51 #include "valuenode_timedswap.h"
  52 #include "valuenode_twotone.h"
  53 #include "valuenode_stripes.h"
  54 #include "valuenode_segcalctangent.h"
  55 #include "valuenode_segcalcvertex.h"
  56 #include "valuenode_bline.h"
  57
  58 #include "layer.h"
  59 #include "string.h"
  60
  61 #include "exception.h"
  62
  63 #include "gradient.h"
  64
  65 #include <map>
  66 #include <sigc++/bind.h>
  67
  68 #endif
  69
  70 /* === U S I N G =========================================================== */
  71
  72 using namespace std;
  73 using namespace synfig;
  74 using namespace etl;
  75
  76 /*
  77 class test_class {
  78 static int bleh;
  79 public:
  80         test_class() { assert(!bleh); bleh++; synfig::info("test_class: initi: %d",bleh); }
  81         ~test_class() { assert(bleh); synfig::info("test_class: uninit: %d",bleh); bleh--; }
  82 };
  83 int test_class::bleh(0);
  84
  85 test_class test_class_instance;
  86 */
  87
  88 /* === M A C R O S ========================================================= */
  89
  90 inline bool is_whitespace(char x) { return ((x)=='\n' || (x)=='\t' || (x)==' '); }
  91
  92 /* === P R O C E D U R E S ================================================= */
  93
  94 static std::map<String, Canvas::LooseHandle>* open_canvas_map_(0);
  95
  96 std::map<synfig::String, etl::loose_handle<Canvas> >& synfig::get_open_canvas_map()
  97 {
  98         if(!open_canvas_map_)
  99                 open_canvas_map_=new std::map<String, Canvas::LooseHandle>;
 100         return *open_canvas_map_;
 101 }
 102
 103 static void _remove_from_open_canvas_map(Canvas *x) { get_open_canvas_map().erase(etl::absolute_path(x->get_file_name())); }
 104
 105 static void _canvas_file_name_changed(Canvas *x)
 106 {
 107         std::map<synfig::String, etl::loose_handle<Canvas> >::iterator iter;
 108
 109         for(iter=get_open_canvas_map().begin();iter!=get_open_canvas_map().end();++iter)
 110                 if(iter->second==x)
 111                         break;
 112         assert(iter!=get_open_canvas_map().end());
 113         if(iter==get_open_canvas_map().end())
 114                 return;
 115         get_open_canvas_map().erase(iter->first);
 116         get_open_canvas_map()[etl::absolute_path(x->get_file_name())]=x;
 117
 118 }
 119
 120 Canvas::Handle
 121 synfig::open_canvas(const String &filename)
 122 {
 123         CanvasParser parser;
 124
 125         parser.set_allow_errors(true);
 126
 127         Canvas::Handle canvas=parser.parse_from_file(filename);
 128
 129         if(parser.error_count())
 130                 return Canvas::Handle();
 131
 132         return canvas;
 133 }
 134
 135 Canvas::Handle
 136 synfig::open_canvas_as(const String &filename,const String &as)
 137 {
 138         CanvasParser parser;
 139
 140         parser.set_allow_errors(true);
 141
 142         Canvas::Handle canvas=parser.parse_from_file_as(filename,as);
 143
 144         if(parser.error_count())
 145                 return Canvas::Handle();
 146
 147         return canvas;
 148 }
 149
 150 Canvas::Handle
 151 synfig::string_to_canvas(const String &data)
 152 {
 153         CanvasParser parser;
 154
 155         parser.set_allow_errors(true);
 156
 157         Canvas::Handle canvas=parser.parse_from_string(data);
 158
 159         if(parser.error_count())
 160                 return Canvas::Handle();
 161
 162         return canvas;
 163 }
 164
 165 /* === M E T H O D S ======================================================= */
 166
 167 void
 168 CanvasParser::error_unexpected_element(xmlpp::Node *element,const String &got, const String &expected)
 169 {
 170         error(element,strprintf(_("Unexpected element <%s>, Expected <%s>"),got.c_str(),expected.c_str()));
 171 }
 172
 173 void
 174 CanvasParser::error_unexpected_element(xmlpp::Node *element,const String &got)
 175 {
 176         error(element,strprintf(_("Unexpected element <%s>"),got.c_str()));
 177 }
 178
 179 void
 180 CanvasParser::warning(xmlpp::Node *element, const String &text)
 181 {
 182         string str=strprintf("%s:<%s>:%d: warning: ",filename.c_str(),element->get_name().c_str(),element->get_line())+text;
 183         //synfig::warning(str);
 184         cerr<<str<<endl;
 185         total_warnings_++;
 186         if(total_warnings_>=max_warnings_)
 187                 fatal_error(element, _("Too many warnings"));
 188 }
 189
 190 void
 191 CanvasParser::error(xmlpp::Node *element, const String &text)
 192 {
 193         string str=strprintf("%s:<%s>:%d: error: ",filename.c_str(),element->get_name().c_str(),element->get_line())+text;
 194         total_errors_++;
 195         if(!allow_errors_)
 196                 throw runtime_error(str);
 197         cerr<<str<<endl;
 198         //      synfig::error(str);
 199 }
 200
 201 void
 202 CanvasParser::fatal_error(xmlpp::Node *element, const String &text)
 203 {
 204         string str=strprintf("%s:<%s>:%d:",filename.c_str(),element->get_name().c_str(),element->get_line())+text;
 205         throw runtime_error(str);
 206 }
 207
 208
 209
 210 Keyframe
 211 CanvasParser::parse_keyframe(xmlpp::Element *element,Canvas::Handle canvas)
 212 {
 213         assert(element->get_name()=="keyframe");
 214
 215         if(!element->get_attribute("time"))
 216         {
 217                 error(element,strprintf(_("<%s> is missing \"%s\" attribute"),"real","time"));
 218                 return Keyframe();
 219         }
 220
 221         Keyframe ret(Time(element->get_attribute("time")->get_value(),canvas->rend_desc().get_frame_rate()));
 222
 223
 224         if(element->get_children().empty())
 225                 return ret;
 226
 227         if(element->get_child_text()->get_content().empty())
 228                 return ret;
 229
 230         ret.set_description(element->get_child_text()->get_content());
 231
 232         return ret;
 233 }
 234
 235
 236 Real
 237 CanvasParser::parse_real(xmlpp::Element *element)
 238 {
 239         assert(element->get_name()=="real");
 240
 241         if(!element->get_children().empty())
 242                 warning(element, strprintf(_("<%s> should not contain anything"),"real"));
 243
 244         if(!element->get_attribute("value"))
 245         {
 246                 error(element,strprintf(_("<%s> is missing \"value\" attribute"),"real"));
 247                 return false;
 248         }
 249
 250         string val=element->get_attribute("value")->get_value();
 251
 252         return atof(val.c_str());
 253 }
 254
 255 Time
 256 CanvasParser::parse_time(xmlpp::Element *element,Canvas::Handle canvas)
 257 {
 258         assert(element->get_name()=="time");
 259
 260         if(!element->get_children().empty())
 261                 warning(element, strprintf(_("<%s> should not contain anything"),"time"));
 262
 263         if(!element->get_attribute("value"))
 264         {
 265                 error(element,strprintf(_("<%s> is missing \"value\" attribute"),"time"));
 266                 return false;
 267         }
 268
 269         string val=element->get_attribute("value")->get_value();
 270
 271         return Time(val,canvas->rend_desc().get_frame_rate());
 272 }
 273
 274 int
 275 CanvasParser::parse_integer(xmlpp::Element *element)
 276 {
 277         assert(element->get_name()=="integer");
 278
 279         if(!element->get_children().empty())
 280                 warning(element, strprintf(_("<%s> should not contain anything"),"integer"));
 281
 282         if(!element->get_attribute("value"))
 283         {
 284                 error(element,strprintf(_("<%s> is missing \"value\" attribute"),"integer"));
 285                 return false;
 286         }
 287
 288         string val=element->get_attribute("value")->get_value();
 289
 290         return atoi(val.c_str());
 291 }
 292
 293 Vector
 294 CanvasParser::parse_vector(xmlpp::Element *element)
 295 {
 296         assert(element->get_name()=="vector");
 297
 298         if(element->get_children().empty())
 299         {
 300                 error(element, "Undefined value in <vector>");
 301                 return Vector();
 302         }
 303
 304         Vector vect;
 305
 306         xmlpp::Element::NodeList list = element->get_children();
 307         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 308         {
 309                 xmlpp::Element *child=dynamic_cast<xmlpp::Element*>((xmlpp::Node*)*iter);
 310                 if(!child)
 311                         continue;
 312                 else
 313                 if(child->get_name()=="x")
 314                 {
 315                         if(child->get_children().empty())
 316                         {
 317                                 error(element, "Undefined value in <x>");
 318                                 return Vector();
 319                         }
 320                         vect[0]=atof(child->get_child_text()->get_content().c_str());
 321                 }
 322                 else
 323                 if(child->get_name()=="y")
 324                 {
 325                         if(child->get_children().empty())
 326                         {
 327                                 error(element, "Undefined value in <y>");
 328                                 return Vector();
 329                         }
 330                         vect[1]=atof(child->get_child_text()->get_content().c_str());
 331                 }
 332                 else
 333                         error_unexpected_element(child,child->get_name());
 334         }
 335         return vect;
 336 }
 337
 338 Color
 339 CanvasParser::parse_color(xmlpp::Element *element)
 340 {
 341         assert(element->get_name()=="color");
 342
 343         if(element->get_children().empty())
 344         {
 345                 error(element, "Undefined value in <color>");
 346                 return Color();
 347         }
 348
 349         Color color(0);
 350
 351         xmlpp::Element::NodeList list = element->get_children();
 352         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 353         {
 354                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 355                 if(!child)
 356                         continue;
 357                 else
 358                 if(child->get_name()=="r")
 359                 {
 360                         if(child->get_children().empty())
 361                         {
 362                                 error(element, "Undefined value in <r>");
 363                                 return Color();
 364                         }
 365                         color.set_r(atof(child->get_child_text()->get_content().c_str()));
 366                 }
 367                 else
 368                 if(child->get_name()=="g")
 369                 {
 370                         if(child->get_children().empty())
 371                         {
 372                                 error(element, "Undefined value in <g>");
 373                                 return Color();
 374                         }
 375                         color.set_g(atof(child->get_child_text()->get_content().c_str()));
 376                 }
 377                 else
 378                 if(child->get_name()=="b")
 379                 {
 380                         if(child->get_children().empty())
 381                         {
 382                                 error(element, "Undefined value in <b>");
 383                                 return Color();
 384                         }
 385                         color.set_b(atof(child->get_child_text()->get_content().c_str()));
 386                 }
 387                 else
 388                 if(child->get_name()=="a")
 389                 {
 390                         if(child->get_children().empty())
 391                         {
 392                                 error(element, "Undefined value in <a>");
 393                                 return Color();
 394                         }
 395                         color.set_a(atof(child->get_child_text()->get_content().c_str()));
 396                 }
 397                 else
 398                         error_unexpected_element(child,child->get_name());
 399         }
 400
 401         return color;
 402 }
 403
 404 synfig::String
 405 CanvasParser::parse_string(xmlpp::Element *element)
 406 {
 407         assert(element->get_name()=="string");
 408
 409         if(element->get_children().empty())
 410         {
 411                 warning(element, "Undefined value in <string>");
 412                 return synfig::String();
 413         }
 414
 415         if(element->get_child_text()->get_content().empty())
 416         {
 417                 warning(element, "Content element of <string> appears to be empty");
 418                 return synfig::String();
 419         }
 420
 421         return element->get_child_text()->get_content();
 422 }
 423
 424 bool
 425 CanvasParser::parse_bool(xmlpp::Element *element)
 426 {
 427         assert(element->get_name()=="bool");
 428
 429         if(!element->get_children().empty())
 430                 warning(element, strprintf(_("<%s> should not contain anything"),"bool"));
 431
 432         if(!element->get_attribute("value"))
 433         {
 434                 error(element,strprintf(_("<%s> is missing \"value\" attribute"),"bool"));
 435                 return false;
 436         }
 437
 438         string val=element->get_attribute("value")->get_value();
 439
 440         if(val=="true" || val=="1")
 441                 return true;
 442         if(val=="false" || val=="0")
 443                 return false;
 444
 445         error(element,strprintf(_("Bad value \"%s\" in <%s>"),val.c_str(),"bool"));
 446
 447         return false;
 448 }
 449
 450 Gradient
 451 CanvasParser::parse_gradient(xmlpp::Element *node)
 452 {
 453         assert(node->get_name()=="gradient");
 454         Gradient ret;
 455
 456         xmlpp::Element::NodeList list = node->get_children();
 457         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 458         {
 459                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 460                 if(!child)
 461                         continue;
 462                 else
 463                 {
 464                         Gradient::CPoint cpoint;
 465                         cpoint.color=parse_color(child);
 466
 467                         if(!child->get_attribute("pos"))
 468                         {
 469                                 error(child,strprintf(_("<%s> is missing \"pos\" attribute"),"gradient"));
 470                                 return Gradient();
 471                         }
 472
 473                         cpoint.pos=atof(child->get_attribute("pos")->get_value().c_str());
 474
 475                         ret.push_back(cpoint);
 476                 }
 477         }
 478         ret.sort();
 479         return ret;
 480 }
 481
 482 ValueBase
 483 CanvasParser::parse_list(xmlpp::Element *element,Canvas::Handle canvas)
 484 {
 485         vector<ValueBase> value_list;
 486
 487         xmlpp::Element::NodeList list = element->get_children();
 488         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 489         {
 490                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 491                 if(!child)
 492                         continue;
 493                 else
 494                 {
 495                         value_list.push_back(parse_value(child,canvas));
 496                         if(!value_list.back().is_valid())
 497                         {
 498                                 value_list.pop_back();
 499                                 error(child,"Bad ValueBase");
 500                                 continue;
 501                         }
 502                 }
 503         }
 504         return value_list;
 505 }
 506
 507 Segment
 508 CanvasParser::parse_segment(xmlpp::Element *element)
 509 {
 510         assert(element->get_name()=="segment");
 511
 512         if(element->get_children().empty())
 513         {
 514                 error(element, "Undefined value in <segment>");
 515                 return Segment();
 516         }
 517
 518         Segment seg;
 519
 520         xmlpp::Element::NodeList list = element->get_children();
 521         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 522         {
 523                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 524                 if(!child)
 525                         continue;
 526                 else
 527                 if(child->get_name()=="p1")
 528                 {
 529                         xmlpp::Element::NodeList list = child->get_children();
 530                         xmlpp::Element::NodeList::iterator iter;
 531
 532                         // Search for the first non-text XML element
 533                         for(iter = list.begin(); iter != list.end(); ++iter)
 534                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 535
 536                         if(iter==list.end())
 537                         {
 538                                 error(element, "Undefined value in <p1>");
 539                                 continue;
 540                         }
 541
 542                         if((*iter)->get_name()!="vector")
 543                         {
 544                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 545                                 continue;
 546                         }
 547
 548                         seg.p1=parse_vector(dynamic_cast<xmlpp::Element*>(*iter));
 549                 }
 550                 else
 551                 if(child->get_name()=="t1")
 552                 {
 553                         xmlpp::Element::NodeList list = child->get_children();
 554                         xmlpp::Element::NodeList::iterator iter;
 555
 556                         // Search for the first non-text XML element
 557                         for(iter = list.begin(); iter != list.end(); ++iter)
 558                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 559
 560                         if(iter==list.end())
 561                         {
 562                                 error(element, "Undefined value in <t1>");
 563                                 continue;
 564                         }
 565
 566                         if((*iter)->get_name()!="vector")
 567                         {
 568                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 569                                 continue;
 570                         }
 571
 572                         seg.t1=parse_vector(dynamic_cast<xmlpp::Element*>(*iter));
 573                 }
 574                 else
 575                 if(child->get_name()=="p2")
 576                 {
 577                         xmlpp::Element::NodeList list = child->get_children();
 578                         xmlpp::Element::NodeList::iterator iter;
 579
 580                         // Search for the first non-text XML element
 581                         for(iter = list.begin(); iter != list.end(); ++iter)
 582                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 583
 584                         if(iter==list.end())
 585                         {
 586                                 error(element, "Undefined value in <p2>");
 587                                 continue;
 588                         }
 589
 590                         if((*iter)->get_name()!="vector")
 591                         {
 592                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 593                                 continue;
 594                         }
 595
 596                         seg.p2=parse_vector(dynamic_cast<xmlpp::Element*>(*iter));
 597                 }
 598                 else
 599                 if(child->get_name()=="t2")
 600                 {
 601                         xmlpp::Element::NodeList list = child->get_children();
 602                         xmlpp::Element::NodeList::iterator iter;
 603
 604                         // Search for the first non-text XML element
 605                         for(iter = list.begin(); iter != list.end(); ++iter)
 606                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 607
 608                         if(iter==list.end())
 609                         {
 610                                 error(element, "Undefined value in <t2>");
 611                                 continue;
 612                         }
 613
 614                         if((*iter)->get_name()!="vector")
 615                         {
 616                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 617                                 continue;
 618                         }
 619
 620                         seg.t2=parse_vector(dynamic_cast<xmlpp::Element*>(*iter));
 621                 }
 622                 else
 623                         error_unexpected_element(child,child->get_name());
 624         }
 625         return seg;
 626 }
 627
 628 BLinePoint
 629 CanvasParser::parse_bline_point(xmlpp::Element *element)
 630 {
 631         assert(element->get_name()=="bline_point");
 632         if(element->get_children().empty())
 633         {
 634                 error(element, "Undefined value in <bline_point>");
 635                 return BLinePoint();
 636         }
 637
 638         BLinePoint ret;
 639         ret.set_split_tangent_flag(false);
 640
 641         xmlpp::Element::NodeList list = element->get_children();
 642         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 643         {
 644                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 645                 if(!child)
 646                         continue;
 647                 else
 648                 // Vertex
 649                 if(child->get_name()[0]=='v' || child->get_name()=="p1")
 650                 {
 651                         xmlpp::Element::NodeList list = child->get_children();
 652                         xmlpp::Element::NodeList::iterator iter;
 653
 654                         // Search for the first non-text XML element
 655                         for(iter = list.begin(); iter != list.end(); ++iter)
 656                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 657
 658                         if(iter==list.end())
 659                         {
 660                                 error(element, "Undefined value in <vertex>");
 661                                 continue;
 662                         }
 663
 664                         if((*iter)->get_name()!="vector")
 665                         {
 666                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 667                                 continue;
 668                         }
 669
 670                         ret.set_vertex(parse_vector(dynamic_cast<xmlpp::Element*>(*iter)));
 671                 }
 672                 else
 673                 // Tangent 1
 674                 if(child->get_name()=="t1" || child->get_name()=="tangent")
 675                 {
 676                         xmlpp::Element::NodeList list = child->get_children();
 677                         xmlpp::Element::NodeList::iterator iter;
 678
 679                         // Search for the first non-text XML element
 680                         for(iter = list.begin(); iter != list.end(); ++iter)
 681                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 682
 683                         if(iter==list.end())
 684                         {
 685                                 error(element, "Undefined value in <t1>");
 686                                 continue;
 687                         }
 688
 689                         if((*iter)->get_name()!="vector")
 690                         {
 691                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 692                                 continue;
 693                         }
 694
 695                         ret.set_tangent1(parse_vector(dynamic_cast<xmlpp::Element*>(*iter)));
 696                 }
 697                 else
 698                 // Tangent 2
 699                 if(child->get_name()=="t2")
 700                 {
 701                         xmlpp::Element::NodeList list = child->get_children();
 702                         xmlpp::Element::NodeList::iterator iter;
 703
 704                         // Search for the first non-text XML element
 705                         for(iter = list.begin(); iter != list.end(); ++iter)
 706                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 707
 708                         if(iter==list.end())
 709                         {
 710                                 error(element, "Undefined value in <t2>");
 711                                 continue;
 712                         }
 713
 714                         if((*iter)->get_name()!="vector")
 715                         {
 716                                 error_unexpected_element((*iter),(*iter)->get_name(),"vector");
 717                                 continue;
 718                         }
 719
 720                         ret.set_tangent2(parse_vector(dynamic_cast<xmlpp::Element*>(*iter)));
 721                         ret.set_split_tangent_flag(true);
 722                 }
 723                 else
 724                 // width
 725                 if(child->get_name()=="width")
 726                 {
 727                         xmlpp::Element::NodeList list = child->get_children();
 728                         xmlpp::Element::NodeList::iterator iter;
 729
 730                         // Search for the first non-text XML element
 731                         for(iter = list.begin(); iter != list.end(); ++iter)
 732                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 733
 734                         if(iter==list.end())
 735                         {
 736                                 error(element, "Undefined value in <width>");
 737                                 continue;
 738                         }
 739
 740                         if((*iter)->get_name()!="real")
 741                         {
 742                                 error_unexpected_element((*iter),(*iter)->get_name(),"real");
 743                                 continue;
 744                         }
 745
 746                         ret.set_width(parse_real(dynamic_cast<xmlpp::Element*>(*iter)));
 747                 }
 748                 else
 749                 // origin
 750                 if(child->get_name()=="origin")
 751                 {
 752                         xmlpp::Element::NodeList list = child->get_children();
 753                         xmlpp::Element::NodeList::iterator iter;
 754
 755                         // Search for the first non-text XML element
 756                         for(iter = list.begin(); iter != list.end(); ++iter)
 757                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 758
 759                         if(iter==list.end())
 760                         {
 761                                 error(element, "Undefined value in <origin>");
 762                                 continue;
 763                         }
 764
 765                         if((*iter)->get_name()!="real")
 766                         {
 767                                 error_unexpected_element((*iter),(*iter)->get_name(),"real");
 768                                 continue;
 769                         }
 770
 771                         ret.set_origin(parse_real(dynamic_cast<xmlpp::Element*>(*iter)));
 772                 }
 773                 else
 774                         error_unexpected_element(child,child->get_name());
 775         }
 776         return ret;
 777 }
 778
 779 Angle
 780 CanvasParser::parse_angle(xmlpp::Element *element)
 781 {
 782         assert(element->get_name()=="angle");
 783
 784         if(!element->get_children().empty())
 785                 warning(element, strprintf(_("<%s> should not contain anything"),"angle"));
 786
 787         if(!element->get_attribute("value"))
 788         {
 789                 error(element,strprintf(_("<%s> is missing \"value\" attribute"),"angle"));
 790                 return Angle();
 791         }
 792
 793         string val=element->get_attribute("value")->get_value();
 794
 795         return Angle::deg(atof(val.c_str()));
 796 }
 797
 798 ValueBase
 799 CanvasParser::parse_value(xmlpp::Element *element,Canvas::Handle canvas)
 800 {
 801         if(element->get_name()=="real")
 802                 return parse_real(element);
 803         else
 804         if(element->get_name()=="time")
 805                 return parse_time(element,canvas);
 806         else
 807         if(element->get_name()=="integer")
 808                 return parse_integer(element);
 809         else
 810         if(element->get_name()=="string")
 811                 return parse_string(element);
 812         else
 813         if(element->get_name()=="vector")
 814                 return parse_vector(element);
 815         else
 816         if(element->get_name()=="color")
 817                 return parse_color(element);
 818         else
 819         if(element->get_name()=="segment")
 820                 return parse_segment(element);
 821         else
 822         if(element->get_name()=="list")
 823                 return parse_list(element,canvas);
 824         else
 825         if(element->get_name()=="gradient")
 826                 return parse_gradient(element);
 827         else
 828         if(element->get_name()=="bool")
 829                 return parse_bool(element);
 830         else
 831         //if(element->get_name()=="canvas")
 832         //      return parse_canvas(element,canvas,true);       // inline canvas
 833         //else
 834         if(element->get_name()=="angle" || element->get_name()=="degrees" || element->get_name()=="radians" || element->get_name()=="rotations")
 835                 return parse_angle(element);
 836         else
 837         if(element->get_name()=="bline_point")
 838                 return parse_bline_point(element);
 839         else
 840         if(element->get_name()=="canvas")
 841                 return ValueBase(parse_canvas(element,canvas,true));
 842         else
 843         {
 844                 DEBUGPOINT();
 845                 error_unexpected_element(element,element->get_name());
 846         }
 847
 848         return ValueBase();
 849 }
 850
 851
 852
 853
 854 ValueNode_Animated::Handle
 855 CanvasParser::parse_animated(xmlpp::Element *element,Canvas::Handle canvas)
 856 {
 857         assert(element->get_name()=="hermite" || element->get_name()=="animated");
 858
 859         if(!element->get_attribute("type"))
 860         {
 861                 error(element,"Missing attribute \"type\" in <animated>");
 862                 return ValueNode_Animated::Handle();
 863         }
 864
 865         ValueBase::Type type=ValueBase::ident_type(element->get_attribute("type")->get_value());
 866
 867         if(!type)
 868         {
 869                 error(element,"Bad type in <animated>");
 870                 return ValueNode_Animated::Handle();
 871         }
 872
 873         ValueNode_Animated::Handle value_node=ValueNode_Animated::create(type);
 874
 875         if(!value_node)
 876         {
 877                 error(element,strprintf(_("Unable to create <animated> with type \"%s\""),ValueBase::type_name(type).c_str()));
 878                 return ValueNode_Animated::Handle();
 879         }
 880
 881         value_node->set_root_canvas(canvas->get_root());
 882
 883         xmlpp::Element::NodeList list = element->get_children();
 884         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
 885         {
 886                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
 887                 if(!child)
 888                         continue;
 889                 else
 890                 if(child->get_name()=="waypoint")
 891                 {
 892                         if(!child->get_attribute("time"))
 893                         {
 894                                 error(child,_("<waypoint> is missing attribute \"time\""));
 895                                 continue;
 896                         }
 897
 898                         Time time(child->get_attribute("time")->get_value(),canvas->rend_desc().get_frame_rate());
 899
 900
 901                         ValueNode::Handle waypoint_value_node;
 902                         xmlpp::Element::NodeList list = child->get_children();
 903
 904                         if(child->get_attribute("use"))
 905                         {
 906                                 if(!list.empty())
 907                                         warning(child,_("Found \"use\" attribute for <waypoint>, but it wasn't empty. Ignoring contents..."));
 908
 909                                 // the waypoint might look like this, in which case we won't find "mycanvas" in the list of valuenodes, 'cos it's a canvas
 910                                 //
 911                                 //      <animated type="canvas">
 912                                 //        <waypoint time="0s" use="mycanvas"/>
 913                                 //      </animated>
 914                                 if (type==ValueBase::TYPE_CANVAS)
 915                                         waypoint_value_node=ValueNode_Const::create(canvas->surefind_canvas(child->get_attribute("use")->get_value()));
 916                                 else
 917                                         waypoint_value_node=canvas->surefind_value_node(child->get_attribute("use")->get_value());
 918                         }
 919                         else
 920                         {
 921                                 if(child->get_children().empty())
 922                                 {
 923                                         error(child, strprintf(_("<%s> is missing its data"),"waypoint"));
 924                                         continue;
 925                                 }
 926
 927                                 xmlpp::Element::NodeList::iterator iter;
 928
 929                                 // Search for the first non-text XML element
 930                                 for(iter = list.begin(); iter != list.end(); ++iter)
 931                                         if(dynamic_cast<xmlpp::Element*>(*iter)) break;
 932
 933                                 if(iter==list.end())
 934                                 {
 935                                         error(child, strprintf(_("<%s> is missing its data"),"waypoint"));
 936                                         continue;
 937                                 }
 938
 939                                 waypoint_value_node=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
 940
 941                                 /*
 942                                 ValueBase data=parse_value(dynamic_cast<xmlpp::Element*>(*iter),canvas);
 943
 944                                 if(!data.is_valid())
 945                                 {
 946                                         error(child,_("Bad data for <waypoint>"));
 947                                         continue;
 948                                 }
 949                                 */
 950                                 if(!waypoint_value_node)
 951                                 {
 952                                         error(child,_("Bad data for <waypoint>"));
 953                                         continue;
 954                                 }
 955
 956                                 /*! HACK -- This is a temporary fix to help repair some
 957                                 **      weirdness that is currently going on (10-21-2004).
 958                                 **      This short circuits the linking of waypoints,
 959                                 **      a feature which is so obscure that we can get
 960                                 **      away with something like this pretty easily.
 961                                 */
 962                                 waypoint_value_node=waypoint_value_node->clone();
 963
 964                                 // Warn if there is trash after the param value
 965                                 for(iter++; iter != list.end(); ++iter)
 966                                         if(dynamic_cast<xmlpp::Element*>(*iter))
 967                                                 warning((*iter),strprintf(_("Unexpected element <%s> after <waypoint> data, ignoring..."),(*iter)->get_name().c_str()));
 968                         }
 969
 970
 971                         try {
 972                                 ValueNode_Animated::WaypointList::iterator waypoint=value_node->new_waypoint(time,waypoint_value_node);
 973
 974                         if(child->get_attribute("tension"))
 975                         {
 976                                 synfig::String str(child->get_attribute("tension")->get_value());
 977                                 waypoint->set_tension(atof(str.c_str()));
 978                         }
 979                         if(child->get_attribute("temporal-tension"))
 980                         {
 981                                 synfig::String str(child->get_attribute("temporal-tension")->get_value());
 982                                 waypoint->set_time_tension(atof(str.c_str()));
 983                         }
 984                         if(child->get_attribute("continuity"))
 985                         {
 986                                 synfig::String str(child->get_attribute("continuity")->get_value());
 987                                 waypoint->set_continuity(atof(str.c_str()));
 988                         }
 989                         if(child->get_attribute("bias"))
 990                         {
 991                                 synfig::String str(child->get_attribute("bias")->get_value());
 992                                 waypoint->set_bias(atof(str.c_str()));
 993                         }
 994
 995                         if(child->get_attribute("before"))
 996                         {
 997                                 string val=child->get_attribute("before")->get_value();
 998                                 if(val=="halt")
 999                                         waypoint->set_before(INTERPOLATION_HALT);
1000                                 else if(val=="constant")
1001                                         waypoint->set_before(INTERPOLATION_CONSTANT);
1002                                 else if(val=="linear")
1003                                         waypoint->set_before(INTERPOLATION_LINEAR);
1004                                 else if(val=="manual")
1005                                         waypoint->set_before(INTERPOLATION_MANUAL);
1006                                 else if(val=="auto")
1007                                         waypoint->set_before(INTERPOLATION_TCB);
1008                                 else
1009                                         error(child,strprintf(_("\"%s\" not a valid value for attribute \"%s\" in <%s>"),val.c_str(),"before","waypoint"));
1010                         }
1011
1012                         if(child->get_attribute("after"))
1013                         {
1014                                 string val=child->get_attribute("after")->get_value();
1015                                 if(val=="halt")
1016                                         waypoint->set_after(INTERPOLATION_HALT);
1017                                 else if(val=="constant")
1018                                         waypoint->set_after(INTERPOLATION_CONSTANT);
1019                                 else if(val=="linear")
1020                                         waypoint->set_after(INTERPOLATION_LINEAR);
1021                                 else if(val=="manual")
1022                                         waypoint->set_after(INTERPOLATION_MANUAL);
1023                                 else if(val=="auto")
1024                                         waypoint->set_after(INTERPOLATION_TCB);
1025                                 else
1026                                         error(child,strprintf(_("\"%s\" not a valid value for attribute \"%s\" in <%s>"),val.c_str(),"before","waypoint"));
1027                         }
1028                         }
1029                         catch(Exception::BadTime x)
1030                         {
1031                                 warning(child,x.what());
1032                         }
1033                         continue;
1034
1035                 }
1036                 else
1037                         error_unexpected_element(child,child->get_name());
1038         }
1039         value_node->changed();
1040         return value_node;
1041 }
1042
1043 handle<ValueNode_Subtract>
1044 CanvasParser::parse_subtract(xmlpp::Element *element,Canvas::Handle canvas)
1045 {
1046         assert(element->get_name()=="subtract");
1047
1048         handle<ValueNode_Subtract> value_node;
1049         handle<ValueNode> lhs,rhs,scalar;
1050
1051         if(element->get_attribute("type"))
1052         {
1053                 ValueBase::Type type=ValueBase::ident_type(element->get_attribute("type")->get_value());
1054
1055                 if(!type)
1056                 {
1057                         error(element,"Bad type in <subtract>");
1058                         return ValueNode_Subtract::Handle();
1059                 }
1060                 value_node=ValueNode_Subtract::create(type);
1061         }
1062         else
1063                 value_node=ValueNode_Subtract::create();
1064
1065         if(!value_node)
1066         {
1067                 error(element,strprintf(_("Unable to create <subtract>")));
1068                 return handle<ValueNode_Subtract>();
1069         }
1070
1071         //if(element->get_attribute("scalar"))
1072         //{
1073         //      value_node->set_scalar(atof(element->get_attribute("scalar")->get_value().c_str()));
1074         //}
1075
1076         try
1077         {
1078                 if(element->get_attribute("scalar"))
1079                 {
1080                         // This is for compatibility with older versions of the file format
1081                         String value(element->get_attribute("scalar")->get_value());
1082                         if((value[0]<='9' && value[0]>='0')      || value[0]=='-')
1083                         {
1084                                 warning(element, _("Use of a real value where the ID should be is deprecated"));
1085                                 value_node->set_scalar(atof(value.c_str()));
1086                         }
1087                         else
1088                                 value_node->set_scalar(canvas->surefind_value_node(value));
1089                         scalar=value_node->get_scalar();
1090                 }
1091
1092                 if(element->get_attribute("lhs"))
1093                 {
1094                         lhs=canvas->surefind_value_node(element->get_attribute("lhs")->get_value());
1095                         value_node->set_lhs(lhs);
1096                 }
1097
1098                 if(element->get_attribute("rhs"))
1099                 {
1100                         rhs=canvas->surefind_value_node(element->get_attribute("rhs")->get_value());
1101                         value_node->set_rhs(rhs);
1102                 }
1103         }
1104         catch (Exception::IDNotFound)
1105         {
1106                 error(element,"attribute in <subtract> references unknown ID");
1107         }
1108         catch (Exception::FileNotFound)
1109         {
1110                 error(element,"Unable to open external file referenced in ID");
1111         }
1112
1113         xmlpp::Element::NodeList list = element->get_children();
1114         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1115         {
1116                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1117                 if(!child)
1118                         continue;
1119                 else
1120                 if(child->get_name()=="lhs")
1121                 {
1122                         if(lhs)
1123                         {
1124                                 error(child,"LHS component of <subtract> already defined!");
1125                                 continue;
1126                         }
1127
1128                         xmlpp::Element::NodeList list = child->get_children();
1129                         xmlpp::Element::NodeList::iterator iter;
1130
1131                         // Search for the first non-text XML element
1132                         for(iter = list.begin(); iter != list.end(); ++iter)
1133                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
1134
1135                         if(iter==list.end())
1136                         {
1137                                 error(child,_("<lhs> is missing its contents"));
1138                                 continue;
1139                         }
1140
1141                         lhs=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1142
1143                         if(lhs)
1144                                 value_node->set_lhs(lhs);
1145                         else
1146                         {
1147                                 error((*iter),"Parse of LHS ValueNode failed");
1148                         }
1149
1150                         // \todo do a search for more elements and warn if they are found
1151                 }
1152                 else
1153                 if(child->get_name()=="rhs")
1154                 {
1155                         if(rhs)
1156                         {
1157                                 error(child,"RHS component of <subtract> already defined!");
1158                                 continue;
1159                         }
1160
1161                         xmlpp::Element::NodeList list = child->get_children();
1162                         xmlpp::Element::NodeList::iterator iter;
1163
1164                         // Search for the first non-text XML element
1165                         for(iter = list.begin(); iter != list.end(); ++iter)
1166                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
1167
1168                         if(iter==list.end())
1169                         {
1170                                 error(child,_("<rhs> is missing its contents"));
1171                                 continue;
1172                         }
1173
1174                         rhs=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1175
1176                         if(rhs)
1177                                 value_node->set_rhs(rhs);
1178                         else
1179                         {
1180                                 error((*iter),"Parse of RHS ValueNode failed");
1181                         }
1182
1183                         // \todo do a search for more elements and warn if they are found
1184                 }
1185                 else
1186                 if(child->get_name()=="scalar")
1187                 {
1188                         if(scalar)
1189                         {
1190                                 error(child,"scalar component of <subtract> already defined!");
1191                                 continue;
1192                         }
1193
1194                         xmlpp::Element::NodeList list = child->get_children();
1195                         xmlpp::Element::NodeList::iterator iter;
1196
1197                         // Search for the first non-text XML element
1198                         for(iter = list.begin(); iter != list.end(); ++iter)
1199                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
1200
1201                         if(iter==list.end())
1202                         {
1203                                 error(child,_("<scalar> is missing its contents"));
1204                                 continue;
1205                         }
1206
1207                         scalar=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1208
1209                         if(scalar)
1210                                 value_node->set_scalar(scalar);
1211                         else
1212                         {
1213                                 error((*iter),"Parse of scalar ValueNode failed");
1214                         }
1215
1216                         // \todo do a search for more elements and warn if they are found
1217                 }
1218                 else
1219                         error_unexpected_element(child,child->get_name());
1220         }
1221
1222         if(!value_node->get_rhs() || !value_node->get_lhs() || !value_node->get_scalar())
1223                 error(element,"<subtract> is missing LHS, RHS, or SCALAR");
1224
1225         if(value_node->get_rhs() == value_node->get_lhs())
1226                 warning(element,"LHS is equal to RHS in <subtract>, so this value_node will always be zero!");
1227
1228         return value_node;
1229 }
1230
1231 etl::handle<LinkableValueNode>
1232 CanvasParser::parse_linkable_value_node(xmlpp::Element *element,Canvas::Handle canvas)
1233 {
1234         handle<LinkableValueNode> value_node;
1235         ValueBase::Type type;
1236
1237         // Determine the type
1238         if(element->get_attribute("type"))
1239         {
1240                 type=ValueBase::ident_type(element->get_attribute("type")->get_value());
1241
1242                 if(!type)
1243                 {
1244                         error(element,"Bad type in ValueNode");
1245                         return 0;
1246                 }
1247         }
1248         else
1249         {
1250                 error(element,"Missing type in ValueNode");
1251                 return 0;
1252         }
1253
1254         value_node=LinkableValueNode::create(element->get_name(),type);
1255
1256         if(!value_node)
1257         {
1258                 error(element,"Unknown ValueNode type "+element->get_name());
1259                 return 0;
1260         }
1261
1262         if(value_node->get_type()!=type)
1263         {
1264                 error(element,"ValueNode did not accept type");
1265                 return 0;
1266         }
1267
1268         value_node->set_root_canvas(canvas->get_root());
1269
1270         int i;
1271         for(i=0;i<value_node->link_count();i++)
1272         {
1273                 if(element->get_attribute(value_node->link_name(i)))
1274                 try {
1275                         String id(element->get_attribute(value_node->link_name(i))->get_value());
1276
1277                         if(!value_node->set_link(i,
1278                                         canvas->surefind_value_node(
1279                                                 id
1280                                         )
1281                                 )
1282                         ) 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()));
1283                 }
1284                 catch(Exception::IDNotFound)
1285                 {
1286                         error(element,"Unable to resolve "+element->get_attribute(value_node->link_name(i))->get_value());
1287                 }
1288                 catch(Exception::FileNotFound)
1289                 {
1290                         error(element,"Unable to open file referenced in "+element->get_attribute(value_node->link_name(i))->get_value());
1291                 }
1292                 catch(...)
1293                 {
1294                         error(element,strprintf(_("Unknown Exception thrown when referencing ValueNode \"%s\""),
1295                                 element->get_attribute(value_node->link_name(i))->get_value().c_str()));
1296                         throw;
1297                 }
1298         }
1299
1300
1301
1302         xmlpp::Element::NodeList list = element->get_children();
1303         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1304         {
1305                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1306                 try
1307                 {
1308                         if(!child)
1309                                 continue;
1310                         int index=value_node->get_link_index_from_name(child->get_name());
1311
1312                         xmlpp::Element::NodeList list = child->get_children();
1313                         xmlpp::Element::NodeList::iterator iter;
1314
1315                         // Search for the first non-text XML element
1316                         for(iter = list.begin(); iter != list.end(); ++iter)
1317                                 if(dynamic_cast<xmlpp::Element*>(*iter)) break;
1318
1319                         if(iter==list.end())
1320                         {
1321                                 error(child,_("element is missing its contents"));
1322                                 continue;
1323                         }
1324
1325                         ValueNode::Handle link=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1326
1327                         if(!link)
1328                         {
1329                                 error((*iter),"Parse of ValueNode failed");
1330                         }
1331                         else
1332                         if(!value_node->set_link(index,link))
1333                         {
1334                                 //error(dynamic_cast<xmlpp::Element*>(*iter),strprintf("Unable to connect value node ('%s' of type '%s') to link %d",link->get_name().c_str(),ValueBase::type_name(link->get_type()).c_str(),index));
1335                                 error(element,strprintf("Unable to connect value node ('%s' of type '%s') to link %d",link->get_name().c_str(),ValueBase::type_name(link->get_type()).c_str(),index));
1336                         }
1337
1338                         // \todo do a search for more elements and warn if they are found
1339
1340                 }
1341                 catch(Exception::BadLinkName)
1342                 {
1343                         error_unexpected_element(child,child->get_name());
1344                 }
1345                 catch(...)
1346                 {
1347                         error(child,strprintf(_("Unknown Exception thrown when working on element \"%s\""),child->get_name().c_str()));
1348                         throw;
1349                 }
1350         }
1351
1352         return value_node;
1353 }
1354
1355 handle<ValueNode_Composite>
1356 CanvasParser::parse_composite(xmlpp::Element *element,Canvas::Handle canvas)
1357 {
1358         assert(element->get_name()=="composite");
1359
1360         if(!element->get_attribute("type"))
1361         {
1362                 error(element,"Missing attribute \"type\" in <composite>");
1363                 return handle<ValueNode_Composite>();
1364         }
1365
1366         ValueBase::Type type=ValueBase::ident_type(element->get_attribute("type")->get_value());
1367
1368         if(!type)
1369         {
1370                 error(element,"Bad type in <composite>");
1371                 return handle<ValueNode_Composite>();
1372         }
1373
1374         handle<ValueNode_Composite> value_node=ValueNode_Composite::create(type);
1375         handle<ValueNode> c[6];
1376
1377         if(!value_node)
1378         {
1379                 error(element,strprintf(_("Unable to create <composite>")));
1380                 return handle<ValueNode_Composite>();
1381         }
1382
1383         int i;
1384
1385         for(i=0;i<value_node->link_count();i++)
1386         {
1387                 string name=strprintf("c%d",i+1);
1388                 if(c[i])
1389                 {
1390                         error(element,name+" was already defined in <composite>");
1391                         continue;
1392                 }
1393                 if(element->get_attribute(name))
1394                 {
1395                         c[i]=canvas->surefind_value_node(element->get_attribute(name)->get_value());
1396                         if(c[i])
1397                         {
1398                                 if(!value_node->set_link(i,c[i]))
1399                                 {
1400                                         error(element,'"'+name+"\" attribute in <composite> has bad type");
1401                                 }
1402                         }
1403                         else
1404                                 error(element,'"'+name+"\" attribute in <composite> references unknown ID");
1405                 }
1406         }
1407
1408         xmlpp::Element::NodeList list = element->get_children();
1409         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1410         {
1411                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1412                 if(!child)
1413                         continue;
1414                 else
1415                 for(i=0;i<value_node->link_count();i++)
1416                 {
1417                         string name=strprintf("c%d",i+1);
1418                         if(child->get_name()==name)
1419                         {
1420                                 if(c[i])
1421                                 {
1422                                         error(child,name+" was already defined in <composite>");
1423                                         break;
1424                                 }
1425
1426                                 xmlpp::Element::NodeList list = child->get_children();
1427                                 xmlpp::Element::NodeList::iterator iter;
1428
1429                                 // Search for the first non-text XML element
1430                                 for(iter = list.begin(); iter != list.end(); ++iter)
1431                                         if(dynamic_cast<xmlpp::Element*>(*iter)) break;
1432
1433                                 if(iter==list.end())
1434                                 {
1435                                         error(child,strprintf(_("<%s> is missing its contents"),name.c_str()));
1436                                         break;
1437                                 }
1438
1439                                 c[i]=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1440
1441                                 if(!c[i])
1442                                 {
1443                                         error((*iter),"Parse of "+name+" ValueNode failed");
1444                                         break;
1445                                 }
1446
1447                                 if(!value_node->set_link(i,c[i]))
1448                                 {
1449                                         error(child,strprintf(_("<%s> has a bad value"),name.c_str()));
1450                                         break;
1451                                 }
1452
1453                                 // \todo do a search for more elements and warn if they are found
1454                                 break;
1455                         }
1456                 }
1457                 // somewhat of a hack, but it works
1458                 if(i==value_node->link_count()) error_unexpected_element(child,child->get_name());
1459         }
1460
1461         switch(value_node->link_count())
1462         {
1463         case 1:
1464                 if(!value_node->get_link(0))
1465                 {
1466                         error(element,"<composite> is missing parameters");
1467                         return handle<ValueNode_Composite>();
1468                 }
1469                 break;
1470         case 2:
1471                 if(!value_node->get_link(0) ||!value_node->get_link(1))
1472                 {
1473                         error(element,"<composite> is missing parameters");
1474                         return handle<ValueNode_Composite>();
1475                 }
1476                 break;
1477         case 3:
1478                 if(!value_node->get_link(0) ||!value_node->get_link(1) ||!value_node->get_link(2))
1479                 {
1480                         error(element,"<composite> is missing parameters");
1481                         return handle<ValueNode_Composite>();
1482                 }
1483                 break;
1484         case 4:
1485                 if(!value_node->get_link(0) ||!value_node->get_link(1) ||!value_node->get_link(2) ||!value_node->get_link(3))
1486                 {
1487                         error(element,"<composite> is missing parameters");
1488                         return handle<ValueNode_Composite>();
1489                 }
1490                 break;
1491     }
1492         return value_node;
1493 }
1494
1495 // This will also parse a bline
1496 handle<ValueNode_DynamicList>
1497 CanvasParser::parse_dynamic_list(xmlpp::Element *element,Canvas::Handle canvas)
1498 {
1499         assert(element->get_name()=="dynamic_list" || element->get_name()=="bline");
1500
1501         const float fps(canvas?canvas->rend_desc().get_frame_rate():0);
1502
1503         if(!element->get_attribute("type"))
1504         {
1505                 error(element,"Missing attribute \"type\" in <dynamic_list>");
1506                 return handle<ValueNode_DynamicList>();
1507         }
1508
1509         ValueBase::Type type=ValueBase::ident_type(element->get_attribute("type")->get_value());
1510
1511         if(!type)
1512         {
1513                 error(element,"Bad type in <dynamic_list>");
1514                 return handle<ValueNode_DynamicList>();
1515         }
1516
1517         handle<ValueNode_DynamicList> value_node;
1518         handle<ValueNode_BLine> bline_value_node;
1519
1520         if(element->get_name()=="bline")
1521         {
1522                 value_node=bline_value_node=ValueNode_BLine::create();
1523                 if(element->get_attribute("loop"))
1524                 {
1525                         String loop=element->get_attribute("loop")->get_value();
1526                         if(loop=="true" || loop=="1" || loop=="TRUE" || loop=="True")
1527                                 bline_value_node->set_loop(true);
1528                         else
1529                                 bline_value_node->set_loop(false);
1530                 }
1531
1532         }
1533         else
1534                 value_node=ValueNode_DynamicList::create(type);
1535
1536         if(!value_node)
1537         {
1538                 error(element,strprintf(_("Unable to create <dynamic_list>")));
1539                 return handle<ValueNode_DynamicList>();
1540         }
1541
1542         value_node->set_root_canvas(canvas->get_root());
1543
1544         xmlpp::Element::NodeList list = element->get_children();
1545         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1546         {
1547                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1548                 if(!child)
1549                         continue;
1550                 else
1551                 if(child->get_name()=="entry")
1552                 {
1553                         ValueNode_DynamicList::ListEntry list_entry;
1554
1555                         // Parse begin/end waypoints
1556                         {
1557                                 typedef synfig::ValueNode_DynamicList::ListEntry::Activepoint Activepoint;
1558                                 typedef synfig::ValueNode_DynamicList::ListEntry::ActivepointList ActivepointList;
1559
1560                                 String begin_sequence;
1561                                 String end_sequence;
1562
1563                                 ActivepointList &timing_info(list_entry.timing_info);
1564
1565                                 if(child->get_attribute("begin"))
1566                                         begin_sequence=child->get_attribute("begin")->get_value();
1567
1568                                 if(child->get_attribute("on"))
1569                                         begin_sequence=child->get_attribute("on")->get_value();
1570
1571                                 if(child->get_attribute("end"))
1572                                         end_sequence=child->get_attribute("end")->get_value();
1573
1574                                 if(child->get_attribute("off"))
1575                                         end_sequence=child->get_attribute("off")->get_value();
1576
1577                                 // clear out any auto-start
1578                                 if(!begin_sequence.empty())
1579                                         timing_info.clear();
1580
1581                                 //! \optimize
1582                                 while(!begin_sequence.empty())
1583                                 {
1584                                         String::iterator iter(find(begin_sequence.begin(),begin_sequence.end(),','));
1585                                         String timecode(begin_sequence.begin(), iter);
1586                                         int priority=0;
1587
1588                                         // skip whitespace before checking for a priority
1589                                         while (isspace(timecode[0]))
1590                                                 timecode=timecode.substr(1);
1591
1592                                         // If there is a priority, then grab it and remove
1593                                         // it from the timecode
1594                                         if(timecode[0]=='p')
1595                                         {
1596                                                 //priority=timecode[1]-'0';
1597                                                 //timecode=String(timecode.begin()+3,timecode.end());
1598                                                 int space=timecode.find_first_of(' ');
1599                                                 priority=atoi(String(timecode,1,space-1).c_str());
1600                                                 timecode=String(timecode.begin()+space+1,timecode.end());
1601                                                 //synfig::info("priority: %d      timecode: %s",priority,timecode.c_str());
1602                                         }
1603
1604                                         timing_info.push_back(
1605                                                 Activepoint(
1606                                                         Time(
1607                                                                 timecode,
1608                                                                 fps
1609                                                         ),
1610                                                         true,   // Mark as a "on" activepoint
1611                                                         priority
1612                                                 )
1613                                         );
1614
1615                                         if(iter==begin_sequence.end())
1616                                                 begin_sequence.clear();
1617                                         else
1618                                                 begin_sequence=String(iter+1,begin_sequence.end());
1619                                 }
1620
1621                                 //! \optimize
1622                                 while(!end_sequence.empty())
1623                                 {
1624                                         String::iterator iter(find(end_sequence.begin(),end_sequence.end(),','));
1625                                         String timecode(end_sequence.begin(),   iter);
1626                                         int priority=0;
1627
1628                                         // skip whitespace before checking for a priority
1629                                         while (isspace(timecode[0]))
1630                                                 timecode=timecode.substr(1);
1631
1632                                         // If there is a priority, then grab it and remove
1633                                         // it from the timecode
1634                                         if(timecode[0]=='p')
1635                                         {
1636                                                 //priority=timecode[1]-'0';
1637                                                 //timecode=String(timecode.begin()+3,timecode.end());
1638                                                 int space=timecode.find_first_of(' ');
1639                                                 priority=atoi(String(timecode,1,space-1).c_str());
1640                                                 timecode=String(timecode.begin()+space+1,timecode.end());
1641                                                 //synfig::info("priority: %d      timecode: %s",priority,timecode.c_str());
1642                                         }
1643
1644                                         timing_info.push_back(
1645                                                 Activepoint(
1646                                                         Time(
1647                                                                 timecode,
1648                                                                 fps
1649                                                         ),
1650                                                         false,  // Mark as a "off" activepoint
1651                                                         priority
1652                                                 )
1653                                         );
1654                                         if(iter==end_sequence.end())
1655                                                 end_sequence.clear();
1656                                         else
1657                                                 end_sequence=String(iter+1,end_sequence.end());
1658                                 }
1659
1660                                 timing_info.sort();
1661                         }
1662
1663                         if(child->get_attribute("use"))
1664                         {
1665                                 // \todo does this need to be able to read 'use="canvas"', like waypoints can now?  (see 'surefind_canvas' in this file)
1666                                 string id=child->get_attribute("use")->get_value();
1667                                 try
1668                                 {
1669                                         list_entry.value_node=canvas->surefind_value_node(id);
1670                                 }
1671                                 catch(Exception::IDNotFound)
1672                                 {
1673                                         error(child,"\"use\" attribute in <entry> references unknown ID -- "+id);
1674                                         continue;
1675                                 }
1676                         }
1677                         else
1678                         {
1679                                 xmlpp::Element::NodeList list = child->get_children();
1680                                 xmlpp::Element::NodeList::iterator iter;
1681
1682                                 // Search for the first non-text XML element
1683                                 for(iter = list.begin(); iter != list.end(); ++iter)
1684                                         if(dynamic_cast<xmlpp::Element*>(*iter)) break;
1685
1686                                 if(iter==list.end())
1687                                 {
1688                                         error(child,strprintf(_("<entry> is missing its contents or missing \"use\" element")));
1689                                         continue;
1690                                 }
1691
1692                                 list_entry.value_node=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1693
1694                                 if(!list_entry.value_node)
1695                                         error((*iter),"Parse of ValueNode failed");
1696
1697                                 // \todo do a search for more elements and warn if they are found
1698
1699                         }
1700
1701                         value_node->add(list_entry);
1702                         value_node->set_link(value_node->link_count()-1,list_entry.value_node);
1703                 }
1704                 else
1705                         error_unexpected_element(child,child->get_name());
1706         }
1707         return value_node;
1708 }
1709
1710 handle<ValueNode>
1711 CanvasParser::parse_value_node(xmlpp::Element *element,Canvas::Handle canvas)
1712 {
1713         handle<ValueNode> value_node;
1714         assert(element);
1715
1716         GUID guid;
1717
1718         if(element->get_attribute("guid"))
1719         {
1720                 guid=GUID(element->get_attribute("guid")->get_value())^canvas->get_root()->get_guid();
1721                 value_node=guid_cast<ValueNode>(guid);
1722                 if(value_node)
1723                         return value_node;
1724         }
1725
1726         // If ValueBase::ident_type() recognises the name, then we know it's a ValueBase
1727         if(element->get_name()!="canvas" && ValueBase::ident_type(element->get_name()))
1728         {
1729                 ValueBase data=parse_value(element,canvas);
1730
1731                 if(!data.is_valid())
1732                 {
1733                         error(element,strprintf(_("Bad data in <%s>"),element->get_name().c_str()));
1734                         return value_node;
1735                 }
1736
1737                 // We want to convert this ValueBase into a
1738                 // ValueNode_Const. That way, we can treat the
1739                 // ID like any other Datanode. Think of this
1740                 // as a shorthand for creating constant ValueNodes.
1741
1742                 value_node=ValueNode_Const::create(data);
1743         }
1744         else
1745         if(element->get_name()=="hermite" || element->get_name()=="animated")
1746                 value_node=parse_animated(element,canvas);
1747         else
1748         if(element->get_name()=="subtract")
1749                 value_node=parse_subtract(element,canvas);
1750         else
1751         if(element->get_name()=="composite")
1752                 value_node=parse_composite(element,canvas);
1753         else
1754         if(element->get_name()=="dynamic_list")
1755                 value_node=parse_dynamic_list(element,canvas);
1756         else
1757         if(element->get_name()=="bline") // This is not a typo. The dynamic list parser will parse a bline.
1758                 value_node=parse_dynamic_list(element,canvas);
1759         else
1760         if(LinkableValueNode::book().count(element->get_name()))
1761                 value_node=parse_linkable_value_node(element,canvas);
1762         else
1763         if(element->get_name()=="canvas")
1764                 value_node=ValueNode_Const::create(parse_canvas(element,canvas,true));
1765         else
1766         {
1767                 error_unexpected_element(element,element->get_name());
1768                 error(element, "Expected a ValueNode");
1769         }
1770
1771
1772         value_node->set_root_canvas(canvas->get_root());
1773
1774
1775         // If we were successful, and our element has
1776         // an ID attribute, go ahead and add it to the
1777         // value_node list
1778         if(value_node && element->get_attribute("id"))
1779         {
1780                 string id=element->get_attribute("id")->get_value();
1781
1782                 //value_node->set_id(id);
1783
1784                 // If there is already a value_node in the list
1785                 // with the same ID, then that is an error
1786                 try { canvas->add_value_node(value_node,id); }
1787                 catch(Exception::BadLinkName)
1788                 {
1789                         warning(element,strprintf(_("Bad ID \"%s\""),id.c_str()));
1790                         return value_node;
1791                 }
1792                 catch(Exception::IDAlreadyExists)
1793                 {
1794                         error(element,strprintf(_("Duplicate ID \"%s\""),id.c_str()));
1795                         return value_node;
1796                 }
1797                 catch(...)
1798                 {
1799                         error(element,strprintf(_("Unknown Exception thrown when adding ValueNode \"%s\""),id.c_str()));
1800                         throw;
1801                 }
1802         }
1803         value_node->set_guid(guid);
1804         return value_node;
1805 }
1806
1807 void
1808 CanvasParser::parse_canvas_defs(xmlpp::Element *element,Canvas::Handle canvas)
1809 {
1810         assert(element->get_name()=="defs");
1811         xmlpp::Element::NodeList list = element->get_children();
1812         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1813         {
1814                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1815                 if(!child)
1816                         continue;
1817                 else
1818                 if(child->get_name()=="canvas")
1819                         parse_canvas(child, canvas);
1820                 else
1821                         parse_value_node(child,canvas);
1822         }
1823 }
1824
1825 Layer::Handle
1826 CanvasParser::parse_layer(xmlpp::Element *element,Canvas::Handle canvas)
1827 {
1828
1829         assert(element->get_name()=="layer");
1830         Layer::Handle layer;
1831
1832         if(!element->get_attribute("type"))
1833         {
1834                 error(element,_("Missing \"type\" attribute to \"layer\" element"));
1835                 return Layer::Handle();
1836         }
1837
1838         layer=Layer::create(element->get_attribute("type")->get_value());
1839         layer->set_canvas(canvas);
1840
1841         if(element->get_attribute("group"))
1842         {
1843                 layer->add_to_group(
1844                         element->get_attribute("group")->get_value()
1845                 );
1846         }
1847
1848         // Handle the version attribute
1849         if(element->get_attribute("version"))
1850         {
1851                 String version(element->get_attribute("version")->get_value());
1852                 if(version>layer->get_version())
1853                         warning(element,_("Installed layer version is larger than layer version in file"));
1854                 if(version!=layer->get_version())
1855                         layer->set_version(version);
1856         }
1857
1858         // Handle the description
1859         if(element->get_attribute("desc"))
1860                 layer->set_description(element->get_attribute("desc")->get_value());
1861
1862         if(element->get_attribute("active"))
1863                 layer->set_active(element->get_attribute("active")->get_value()=="false"?false:true);
1864
1865         xmlpp::Element::NodeList list = element->get_children();
1866         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
1867         {
1868                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
1869                 if(!child)
1870                         continue;
1871                 else
1872                 if(child->get_name()=="name")
1873                         warning(child,_("<name> entry for <layer> is not yet supported. Ignoring..."));
1874                 else
1875                 if(child->get_name()=="desc")
1876                         warning(child,_("<desc> entry for <layer> is not yet supported. Ignoring..."));
1877                 else
1878                 if(child->get_name()=="param")
1879                 {
1880                         xmlpp::Element::NodeList list = child->get_children();
1881
1882                         if(!child->get_attribute("name"))
1883                         {
1884                                 error(child,_("Missing \"name\" attribute for <param>."));
1885                                 continue;
1886                         }
1887
1888                         String param_name=child->get_attribute("name")->get_value();
1889
1890                         if(child->get_attribute("use"))
1891                         {
1892                                 // If the "use" attribute is used, then the
1893                                 // element should be empty. Warn the user if
1894                                 // we find otherwise.
1895                                 if(!list.empty())
1896                                         warning(child,_("Found \"use\" attribute for <param>, but it wasn't empty. Ignoring contents..."));
1897
1898                                 String str=     child->get_attribute("use")->get_value();
1899
1900                                 if(layer->get_param(param_name).get_type()==ValueBase::TYPE_CANVAS)
1901                                 {
1902                                         if(!layer->set_param(param_name,canvas->surefind_canvas(str)))
1903                                                 error((*iter),_("Layer rejected canvas link"));
1904                                 }
1905                                 else
1906                                 try
1907                                 {
1908                                         handle<ValueNode> value_node=canvas->surefind_value_node(str);
1909
1910                                         // Assign the value_node to the dynamic parameter list
1911                                         layer->connect_dynamic_param(param_name,value_node);
1912                         }
1913                                 catch(Exception::IDNotFound)
1914                                 {
1915                                         error(child,strprintf(_("Unknown ID (%s) referenced in <param>"),str.c_str()));
1916                                 }
1917
1918                                 continue;
1919                         }
1920
1921                         xmlpp::Element::NodeList::iterator iter;
1922
1923                         // Search for the first non-text XML element
1924                         for(iter = list.begin(); iter != list.end(); ++iter)
1925                                 if(dynamic_cast<xmlpp::Element*>(*iter))
1926                                         break;
1927                                 //if(!(!dynamic_cast<xmlpp::Element*>(*iter) && (*iter)->get_name()=="text"||(*iter)->get_name()=="comment"   )) break;
1928
1929                         if(iter==list.end())
1930                         {
1931                                 error(child,_("<param> is either missing its contents, or missing a \"use\" attribute."));
1932                                 continue;
1933                         }
1934
1935                         // If we recognise the element name as a
1936                         // ValueBase, then treat is at one
1937                         if(/*(*iter)->get_name()!="canvas" && */ValueBase::ident_type((*iter)->get_name()) && !dynamic_cast<xmlpp::Element*>(*iter)->get_attribute("guid"))
1938                         {
1939                                 ValueBase data=parse_value(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1940
1941                                 if(!data.is_valid())
1942                                 {
1943                                         error((*iter),_("Bad data for <param>"));
1944                                         continue;
1945                                 }
1946
1947                                 // Set the layer's parameter, and make sure that
1948                                 // the layer liked it
1949                                 if(!layer->set_param(param_name,data))
1950                                 {
1951                                         warning((*iter),_("Layer rejected value for <param>"));
1952                                         continue;
1953                                 }
1954                         }
1955                         else    // ... otherwise, we assume that it is a ValueNode
1956                         {
1957                                 handle<ValueNode> value_node=parse_value_node(dynamic_cast<xmlpp::Element*>(*iter),canvas);
1958
1959                                 if(!value_node)
1960                                 {
1961                                         error((*iter),_("Bad data for <param>"));
1962                                         continue;
1963                                 }
1964
1965                                 // Assign the value_node to the dynamic parameter list
1966                                 layer->connect_dynamic_param(param_name,value_node);
1967                         }
1968
1969                         // Warn if there is trash after the param value
1970                         for(iter++; iter != list.end(); ++iter)
1971                                 if(dynamic_cast<xmlpp::Element*>(*iter))
1972                                         warning((*iter),strprintf(_("Unexpected element <%s> after <param> data, ignoring..."),(*iter)->get_name().c_str()));
1973                         continue;
1974                 }
1975                 else
1976                         error_unexpected_element(child,child->get_name());
1977         }
1978
1979         layer->reset_version();
1980         return layer;
1981 }
1982
1983 Canvas::Handle
1984 CanvasParser::parse_canvas(xmlpp::Element *element,Canvas::Handle parent,bool inline_, String filename)
1985 {
1986
1987         if(element->get_name()!="canvas")
1988         {
1989                 error_unexpected_element(element,element->get_name(),"canvas");
1990                 return Canvas::Handle();
1991         }
1992         Canvas::Handle canvas;
1993
1994
1995
1996         if(parent && (element->get_attribute("id") || inline_))
1997         {
1998                 if(inline_)
1999                 {
2000                         canvas=Canvas::create_inline(parent);
2001                 }
2002                 else
2003                 {
2004                         try
2005                         {
2006                                 canvas=parent->find_canvas(element->get_attribute("id")->get_value());
2007                         }
2008                         catch(...)
2009                         {
2010                                 canvas=parent->new_child_canvas(element->get_attribute("id")->get_value());
2011                         }
2012                 }
2013                 canvas->rend_desc().clear_flags();
2014         }
2015         else
2016         {
2017                 canvas=Canvas::create();
2018                 if(filename=="/dev/stdin")
2019                         canvas->set_file_name("./stdin.sif");
2020                 else
2021                         canvas->set_file_name(filename);
2022                 canvas->rend_desc().clear_flags();
2023         }
2024
2025         if(element->get_attribute("guid"))
2026         {
2027                 GUID guid(element->get_attribute("guid")->get_value());
2028                 if(guid_cast<Canvas>(guid))
2029                         return guid_cast<Canvas>(guid);
2030                 else
2031                         canvas->set_guid(guid);
2032         }
2033
2034         if(element->get_attribute("width"))
2035                 canvas->rend_desc().set_w(atoi(element->get_attribute("width")->get_value().c_str()));
2036
2037         if(element->get_attribute("height"))
2038                 canvas->rend_desc().set_h(atoi(element->get_attribute("height")->get_value().c_str()));
2039
2040         if(element->get_attribute("xres"))
2041                 canvas->rend_desc().set_x_res(atof(element->get_attribute("xres")->get_value().c_str()));
2042
2043         if(element->get_attribute("yres"))
2044                 canvas->rend_desc().set_y_res(atof(element->get_attribute("yres")->get_value().c_str()));
2045
2046
2047         if(element->get_attribute("fps"))
2048                 canvas->rend_desc().set_frame_rate(atof(element->get_attribute("fps")->get_value().c_str()));
2049
2050         if(element->get_attribute("start-time"))
2051                 canvas->rend_desc().set_time_start(Time(element->get_attribute("start-time")->get_value(),canvas->rend_desc().get_frame_rate()));
2052
2053         if(element->get_attribute("begin-time"))
2054                 canvas->rend_desc().set_time_start(Time(element->get_attribute("begin-time")->get_value(),canvas->rend_desc().get_frame_rate()));
2055
2056         if(element->get_attribute("end-time"))
2057                 canvas->rend_desc().set_time_end(Time(element->get_attribute("end-time")->get_value(),canvas->rend_desc().get_frame_rate()));
2058
2059         if(element->get_attribute("antialias"))
2060                 canvas->rend_desc().set_antialias(atoi(element->get_attribute("antialias")->get_value().c_str()));
2061
2062         if(element->get_attribute("view-box"))
2063         {
2064                 string values=element->get_attribute("view-box")->get_value();
2065                 Vector
2066                         tl,
2067                         br;
2068                 tl[0]=atof(string(values.data(),values.find(' ')).c_str());
2069                 values=string(values.begin()+values.find(' ')+1,values.end());
2070                 tl[1]=atof(string(values.data(),values.find(' ')).c_str());
2071                 values=string(values.begin()+values.find(' ')+1,values.end());
2072                 br[0]=atof(string(values.data(),values.find(' ')).c_str());
2073                 values=string(values.begin()+values.find(' ')+1,values.end());
2074                 br[1]=atof(values.c_str());
2075
2076                 canvas->rend_desc().set_tl(tl);
2077                 canvas->rend_desc().set_br(br);
2078         }
2079
2080         if(element->get_attribute("bgcolor"))
2081         {
2082                 string values=element->get_attribute("bgcolor")->get_value();
2083                 Color bg;
2084
2085                 bg.set_r(atof(string(values.data(),values.find(' ')).c_str()));
2086                 values=string(values.begin()+values.find(' ')+1,values.end());
2087
2088                 bg.set_g(atof(string(values.data(),values.find(' ')).c_str()));
2089                 values=string(values.begin()+values.find(' ')+1,values.end());
2090
2091                 bg.set_b(atof(string(values.data(),values.find(' ')).c_str()));
2092                 values=string(values.begin()+values.find(' ')+1,values.end());
2093
2094                 bg.set_a(atof(values.c_str()));
2095
2096                 canvas->rend_desc().set_bg_color(bg);
2097         }
2098
2099         if(element->get_attribute("focus"))
2100         {
2101                 string values=element->get_attribute("focus")->get_value();
2102                 Vector focus;
2103
2104                 focus[0]=atof(string(values.data(),values.find(' ')).c_str());
2105                 values=string(values.begin()+values.find(' ')+1,values.end());
2106                 focus[1]=atof(values.c_str());
2107
2108                 canvas->rend_desc().set_focus(focus);
2109         }
2110
2111         canvas->rend_desc().set_flags(RendDesc::PX_ASPECT|RendDesc::IM_SPAN);
2112
2113         xmlpp::Element::NodeList list = element->get_children();
2114         for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
2115         {
2116                 xmlpp::Element *child(dynamic_cast<xmlpp::Element*>(*iter));
2117                 if(child)
2118                 {
2119                         if(child->get_name()=="defs")
2120                         {
2121                                 if(canvas->is_inline())
2122                                         error(child,_("Inline canvas cannot have a <defs> section"));
2123                                 parse_canvas_defs(child, canvas);
2124                         }
2125                         else
2126                         if(child->get_name()=="keyframe")
2127                         {
2128                                 if(canvas->is_inline())
2129                                 {
2130                                         warning(child,_("Inline canvas cannot have keyframes"));
2131                                         continue;
2132                                 }
2133
2134                                 canvas->keyframe_list().add(parse_keyframe(child,canvas));
2135                                 canvas->keyframe_list().sync();
2136                         }
2137                         else
2138                         if(child->get_name()=="meta")
2139                         {
2140                                 if(canvas->is_inline())
2141                                 {
2142                                         warning(child,_("Inline canvases cannot have metadata"));
2143                                         continue;
2144                                 }
2145
2146                                 String name,content;
2147
2148                                 if(!child->get_attribute("name"))
2149                                 {
2150                                         warning(child,_("<meta> must have a name"));
2151                                         continue;
2152                                 }
2153
2154                                 if(!child->get_attribute("content"))
2155                                 {
2156                                         warning(child,_("<meta> must have content"));
2157                                         continue;
2158                                 }
2159
2160                                 canvas->set_meta_data(child->get_attribute("name")->get_value(),child->get_attribute("content")->get_value());
2161                         }
2162                         else if(child->get_name()=="name")
2163                         {
2164                                 xmlpp::Element::NodeList list = child->get_children();
2165
2166                                 // If we don't have any name, warn
2167                                 if(list.empty())
2168                                         warning(child,_("blank \"name\" entitity"));
2169
2170                                 string tmp;
2171                                 for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
2172                                         if(dynamic_cast<xmlpp::TextNode*>(*iter))tmp+=dynamic_cast<xmlpp::TextNode*>(*iter)->get_content();
2173                                 canvas->set_name(tmp);
2174                         }
2175                         else
2176                         if(child->get_name()=="desc")
2177                         {
2178
2179                                 xmlpp::Element::NodeList list = child->get_children();
2180
2181                                 // If we don't have any description, warn
2182                                 if(list.empty())
2183                                         warning(child,_("blank \"desc\" entitity"));
2184
2185                                 string tmp;
2186                                 for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
2187                                         if(dynamic_cast<xmlpp::TextNode*>(*iter))tmp+=dynamic_cast<xmlpp::TextNode*>(*iter)->get_content();
2188                                 canvas->set_description(tmp);
2189                         }
2190                         else
2191                         if(child->get_name()=="author")
2192                         {
2193
2194                                 xmlpp::Element::NodeList list = child->get_children();
2195
2196                                 // If we don't have any description, warn
2197                                 if(list.empty())
2198                                         warning(child,_("blank \"author\" entitity"));
2199
2200                                 string tmp;
2201                                 for(xmlpp::Element::NodeList::iterator iter = list.begin(); iter != list.end(); ++iter)
2202                                         if(dynamic_cast<xmlpp::TextNode*>(*iter))tmp+=dynamic_cast<xmlpp::TextNode*>(*iter)->get_content();
2203                                 canvas->set_author(tmp);
2204                         }
2205                         else
2206                         if(child->get_name()=="layer")
2207                         {
2208                                 //if(canvas->is_inline())
2209                                 //      canvas->push_front(parse_layer(child,canvas->parent()));
2210                                 //else
2211                                         canvas->push_front(parse_layer(child,canvas));
2212                         }
2213                         else
2214                                 error_unexpected_element(child,child->get_name());
2215                 }
2216 //              else
2217 //              if((child->get_name()=="text"||child->get_name()=="comment") && child->has_child_text())
2218 //                      continue;
2219         }
2220
2221         if(canvas->value_node_list().placeholder_count())
2222         {
2223                 error(element,strprintf(_("Canvas %s has undefined ValueNodes"),canvas->get_id().c_str()));
2224         }
2225
2226         return canvas;
2227 }
2228
2229 Canvas::Handle
2230 CanvasParser::parse_from_file(const String &file)
2231 {
2232         return parse_from_file_as(file,file);
2233 }
2234
2235 Canvas::Handle
2236 CanvasParser::parse_from_file_as(const String &file_,const String &as_)
2237 {
2238         CHECK_EXPIRE_TIME();
2239         try
2240         {
2241         ChangeLocale change_locale(LC_NUMERIC, "C");
2242                 String file(unix_to_local_path(file_));
2243                 String as(unix_to_local_path(as_));
2244
2245                 if(get_open_canvas_map().count(etl::absolute_path(as)))
2246                         return get_open_canvas_map()[etl::absolute_path(as)];
2247
2248                 filename=as;
2249                 total_warnings_=0;
2250                 xmlpp::DomParser parser(file);
2251                 if(parser)
2252                 {
2253                         Canvas::Handle canvas(parse_canvas(parser.get_document()->get_root_node(),0,false,as));
2254                         get_open_canvas_map()[etl::absolute_path(as)]=canvas;
2255                         canvas->signal_deleted().connect(sigc::bind(sigc::ptr_fun(_remove_from_open_canvas_map),canvas.get()));
2256                         canvas->signal_file_name_changed().connect(sigc::bind(sigc::ptr_fun(_canvas_file_name_changed),canvas.get()));
2257
2258
2259
2260                         const ValueNodeList& value_node_list(canvas->value_node_list());
2261
2262                         again:
2263                         ValueNodeList::const_iterator iter;
2264                         for(iter=value_node_list.begin();iter!=value_node_list.end();++iter)
2265                         {
2266                                 ValueNode::Handle value_node(*iter);
2267                                 if(value_node->is_exported() && value_node->get_id().find("Unnamed")==0)
2268                                 {
2269                                         canvas->remove_value_node(value_node);
2270                                         goto again;
2271                                 }
2272                         }
2273
2274                         return canvas;
2275                 }
2276         }
2277         catch(Exception::BadLinkName) { synfig::error("BadLinkName Thrown"); }
2278         catch(Exception::BadType) { synfig::error("BadType Thrown"); }
2279         catch(Exception::FileNotFound) { synfig::error("FileNotFound Thrown"); }
2280         catch(Exception::IDNotFound) { synfig::error("IDNotFound Thrown"); }
2281         catch(Exception::IDAlreadyExists) { synfig::error("IDAlreadyExists Thrown"); }
2282         catch(const std::exception& ex)
2283         {
2284                 synfig::error("Standard Exception: "+String(ex.what()));
2285                 return Canvas::Handle();
2286         }
2287         catch(const String& str)
2288         {
2289                 cerr<<str<<endl;
2290                 //      synfig::error(str);
2291                 return Canvas::Handle();
2292         }
2293         return Canvas::Handle();
2294 }
2295
2296 Canvas::Handle
2297 CanvasParser::parse_from_string(const String &data)
2298 {
2299         CHECK_EXPIRE_TIME();
2300
2301         try
2302         {
2303         ChangeLocale change_locale(LC_NUMERIC, "C");
2304                 filename=_("<INTERNAL>");
2305                 total_warnings_=0;
2306                 xmlpp::DomParser parser;
2307                 parser.parse_memory(data);
2308                 xmlpp::Element *root=parser.get_document()->get_root_node();
2309                 if(parser)
2310                 {
2311                         Canvas::Handle canvas(parse_canvas(root));
2312                         canvas->signal_deleted().connect(sigc::bind(sigc::ptr_fun(_remove_from_open_canvas_map),canvas.get()));
2313                         canvas->signal_file_name_changed().connect(sigc::bind(sigc::ptr_fun(_canvas_file_name_changed),canvas.get()));
2314
2315                         const ValueNodeList& value_node_list(canvas->value_node_list());
2316                         again:
2317                         ValueNodeList::const_iterator iter;
2318                         for(iter=value_node_list.begin();iter!=value_node_list.end();++iter)
2319                         {
2320                                 ValueNode::Handle value_node(*iter);
2321                                 if(value_node->is_exported() && value_node->get_id().find("Unnamed")==0)
2322                                 {
2323                                         canvas->remove_value_node(value_node);
2324                                         goto again;
2325                                 }
2326                         }
2327
2328                         return canvas;
2329                 }
2330         }
2331         catch(Exception::BadLinkName) { synfig::error("BadLinkName Thrown"); }
2332         catch(Exception::BadType) { synfig::error("BadType Thrown"); }
2333         catch(Exception::FileNotFound) { synfig::error("FileNotFound Thrown"); }
2334         catch(Exception::IDNotFound) { synfig::error("IDNotFound Thrown"); }
2335         catch(Exception::IDAlreadyExists) { synfig::error("IDAlreadyExists Thrown"); }
2336         catch(const std::exception& ex)
2337         {
2338                 synfig::error("Standard Exception: "+String(ex.what()));
2339                 return Canvas::Handle();
2340         }
2341         catch(const String& str)
2342         {
2343                 cerr<<str<<endl;
2344                 //      synfig::error(str);
2345                 return Canvas::Handle();
2346         }
2347         return Canvas::Handle();
2348 }