synfig-studio/src/synfigapp/actions/valuedesclink.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file valuedesclink.cpp
   3 **      \brief Template File
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
   9 **      Copyright (c) 2007, 2008 Chris Moore
  10 **      Copyright (c) 2010 Carlos López
  11 **
  12 **      This package is free software; you can redistribute it and/or
  13 **      modify it under the terms of the GNU General Public License as
  14 **      published by the Free Software Foundation; either version 2 of
  15 **      the License, or (at your option) any later version.
  16 **
  17 **      This package is distributed in the hope that it will be useful,
  18 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  20 **      General Public License for more details.
  21 **      \endlegal
  22 */
  23 /* ========================================================================= */
  24
  25 /* === H E A D E R S ======================================================= */
  26
  27 #ifdef USING_PCH
  28 #       include "pch.h"
  29 #else
  30 #ifdef HAVE_CONFIG_H
  31 #       include <config.h>
  32 #endif
  33
  34 #include "valuedesclink.h"
  35
  36 #include <synfigapp/canvasinterface.h>
  37 #include <synfig/valuenode_const.h>
  38 #include <synfig/valuenode_scale.h>
  39
  40 #include <synfigapp/general.h>
  41
  42 #endif
  43
  44 using namespace std;
  45 using namespace etl;
  46 using namespace synfig;
  47 using namespace synfigapp;
  48 using namespace Action;
  49
  50 /* === M A C R O S ========================================================= */
  51
  52 ACTION_INIT(Action::ValueDescLink);
  53 ACTION_SET_NAME(Action::ValueDescLink,"ValueDescLink");
  54 ACTION_SET_LOCAL_NAME(Action::ValueDescLink,N_("Link"));
  55 ACTION_SET_TASK(Action::ValueDescLink,"connect");
  56 ACTION_SET_CATEGORY(Action::ValueDescLink,Action::CATEGORY_VALUEDESC);
  57 ACTION_SET_PRIORITY(Action::ValueDescLink,0);
  58 ACTION_SET_VERSION(Action::ValueDescLink,"0.0");
  59 ACTION_SET_CVS_ID(Action::ValueDescLink,"$Id$");
  60
  61 ACTION_INIT(Action::ValueDescLinkOpposite);
  62 ACTION_SET_NAME(Action::ValueDescLinkOpposite,"ValueDescLinkOpposite");
  63 ACTION_SET_LOCAL_NAME(Action::ValueDescLinkOpposite,N_("Link Opposite"));
  64 ACTION_SET_TASK(Action::ValueDescLinkOpposite,"connect");
  65 ACTION_SET_CATEGORY(Action::ValueDescLinkOpposite,Action::CATEGORY_VALUEDESC);
  66 ACTION_SET_PRIORITY(Action::ValueDescLinkOpposite,0);
  67 ACTION_SET_VERSION(Action::ValueDescLinkOpposite,"0.0");
  68 ACTION_SET_CVS_ID(Action::ValueDescLinkOpposite,"$Id$");
  69
  70 /* === G L O B A L S ======================================================= */
  71
  72 /* === P R O C E D U R E S ================================================= */
  73
  74 /* === M E T H O D S ======================================================= */
  75
  76 Action::ValueDescLink::ValueDescLink():
  77 poison(false), status_level(0), link_scalar(0.0), link_opposite(false)
  78 {
  79 }
  80
  81 Action::ParamVocab
  82 Action::ValueDescLink::get_param_vocab()
  83 {
  84         ParamVocab ret(Action::CanvasSpecific::get_param_vocab());
  85
  86         ret.push_back(ParamDesc("value_desc",Param::TYPE_VALUEDESC)
  87                 .set_local_name(_("ValueDesc to smart link"))
  88                 .set_requires_multiple()
  89         );
  90
  91         return ret;
  92 }
  93
  94 bool
  95 Action::ValueDescLink::is_candidate(const ParamList &x)
  96 {
  97         return candidate_check(get_param_vocab(),x);
  98 }
  99
 100 bool
 101 Action::ValueDescLink::set_param(const synfig::String& name, const Action::Param &param)
 102 {
 103         if(name=="time" && param.get_type()==Param::TYPE_TIME)
 104         {
 105                 time=param.get_time();
 106                 return true;
 107         }
 108
 109         // don't bother looking for the best value to use if there's already been an error
 110         if (poison==true) return false;
 111
 112         if(name=="value_desc" && param.get_type()==Param::TYPE_VALUEDESC)
 113         {
 114                 ValueDesc value_desc(param.get_value_desc());
 115
 116                 if(value_desc.is_value_node() && value_desc.get_value_node()->is_exported())
 117                 {
 118                         if(link_value_node==value_desc.get_value_node())
 119                                 return true;
 120
 121                         if(link_value_node && link_value_node->is_exported())
 122                         {
 123                                 poison=true;
 124                                 status_message = (_("Cannot link two different exported values ('") +
 125                                                                   value_desc.get_value_node()->get_id() + _("' and '") +
 126                                                                   link_value_node->get_id()) + _("')");
 127                                 return false;
 128                         }
 129
 130                         link_value_node=value_desc.get_value_node();
 131                         link_scalar=value_desc.get_scalar();
 132                         status_message = _("Used exported ValueNode ('") + link_value_node->get_id() + _("').");
 133                 }
 134                 else if(value_desc.is_value_node())
 135                 {
 136                         if(!link_value_node)
 137                         {
 138                                 status_level = 1;
 139                                 status_message = _("Using the only available ValueNode.");
 140                                 link_value_node=value_desc.get_value_node();
 141                                 link_scalar=value_desc.get_scalar();
 142                         }
 143                         else if(link_value_node->is_exported())
 144                         {
 145                                 // we've already seen an exported value, so use that rather than the current value
 146                         }
 147                         // Use the one that is referenced more
 148                         else if(link_value_node->rcount()!=value_desc.get_value_node()->rcount())
 149                         {
 150                                 if(link_value_node->rcount()<value_desc.get_value_node()->rcount())
 151                                 {
 152                                         status_level = 2;
 153                                         status_message = _("Using the most referenced ValueNode.");
 154                                         link_value_node=value_desc.get_value_node();
 155                                         link_scalar=value_desc.get_scalar();
 156                                 }
 157                                 else if (status_level <= 2)
 158                                 {
 159                                         status_level = 2;
 160                                         status_message = _("Using the most referenced ValueNode.");
 161                                 }
 162                         }
 163                         // If the current link value node is a constant and
 164                         // this one isn't, then give preference to the exotic
 165                         else if(ValueNode_Const::Handle::cast_dynamic(link_value_node) && !ValueNode_Const::Handle::cast_dynamic(value_desc.get_value_node()))
 166                         {
 167                                 status_level = 3;
 168                                 status_message = _("There's a tie for most referenced; using the animated ValueNode.");
 169                                 link_value_node=value_desc.get_value_node();
 170                                 link_scalar=value_desc.get_scalar();
 171                         }
 172                         else if(ValueNode_Const::Handle::cast_dynamic(value_desc.get_value_node()) && !ValueNode_Const::Handle::cast_dynamic(link_value_node))
 173                         {
 174                                 if (status_level <= 3)
 175                                 {
 176                                         status_level = 3;
 177                                         status_message = _("There's a tie for most referenced; using the animated ValueNode.");
 178                                 }
 179                         }
 180                         // If both are animated, and this one has more waypoints, then use the one with more waypoints
 181                         else if(ValueNode_Animated::Handle::cast_dynamic(link_value_node) &&
 182                                         ValueNode_Animated::Handle::cast_dynamic(value_desc.get_value_node()) &&
 183                                         ValueNode_Animated::Handle::cast_dynamic(link_value_node)->waypoint_list().size() !=
 184                                         ValueNode_Animated::Handle::cast_dynamic(value_desc.get_value_node())->waypoint_list().size())
 185                         {
 186                                 if (ValueNode_Animated::Handle::cast_dynamic(link_value_node)->waypoint_list().size() <
 187                                         ValueNode_Animated::Handle::cast_dynamic(value_desc.get_value_node())->waypoint_list().size())
 188                                 {
 189                                         status_level = 4;
 190                                         status_message = _("There's a tie for most referenced, and both are animated; using the one with the most waypoints.");
 191                                         link_value_node=value_desc.get_value_node();
 192                                         link_scalar=value_desc.get_scalar();
 193                                 }
 194                                 else if (status_level <= 4)
 195                                 {
 196                                         status_level = 4;
 197                                         status_message = _("There's a tie for most referenced, and both are animated; using the one with the most waypoints.");
 198                                 }
 199                         }
 200                         // If both are Linkable Value Nodes and has waypoint in its children, use the one with more waypoints
 201                         else if(LinkableValueNode::Handle::cast_dynamic(link_value_node) &&
 202                                         LinkableValueNode::Handle::cast_dynamic(value_desc.get_value_node()) &&
 203                                         LinkableValueNode::Handle::cast_dynamic(link_value_node)->get_times().size() !=
 204                                         LinkableValueNode::Handle::cast_dynamic(value_desc.get_value_node())->get_times().size())
 205                         {
 206                                 if(LinkableValueNode::Handle::cast_dynamic(link_value_node)->get_times().size() <
 207                                 LinkableValueNode::Handle::cast_dynamic(value_desc.get_value_node())->get_times().size())
 208                                 {
 209                                         status_level = 4;
 210                                         status_message = _("There's a tie for most referenced, and both are linkable value node animated; using the one with the most waypoints.");
 211                                         link_value_node=value_desc.get_value_node();
 212                                         link_scalar=value_desc.get_scalar();
 213                                 }
 214                                 else if (status_level <= 4)
 215                                 {
 216                                         status_level = 4;
 217                                         status_message = _("There's a tie for most referenced, and both are linkable value node animated; using the one with the most waypoints.");
 218                                 }
 219                         }
 220                         // Use the one that was least recently changed
 221                         else if(link_value_node->get_time_last_changed()!=value_desc.get_value_node()->get_time_last_changed())
 222                         {
 223                                 if(link_value_node->get_time_last_changed()>value_desc.get_value_node()->get_time_last_changed())
 224                                 {
 225                                         status_level = 5;
 226                                         status_message = _("Everything is tied; using the least recently modified value.");
 227                                         link_value_node=value_desc.get_value_node();
 228                                         link_scalar=value_desc.get_scalar();
 229                                 }
 230                                 else if (status_level <= 5)
 231                                 {
 232                                         status_level = 5;
 233                                         status_message = _("Everything is tied; using the least recently modified value.");
 234                                 }
 235                         }
 236                         else
 237                         {
 238                                 status_level = 6;
 239                                 status_message = _("Absolutely everything is tied.");
 240                         }
 241                 }
 242
 243                 if(value_desc_list.size() && value_desc.get_value_type()!=value_desc_list.front().get_value_type())
 244                 {
 245                         // Everything must be of the same type
 246                         poison=true;
 247                         status_message = (strprintf(_("Cannot link two values of different types ('%s' and '%s')"),
 248                                                                                 ValueBase::type_local_name(value_desc.get_value_type()).c_str(),
 249                                                                                 ValueBase::type_local_name(value_desc_list.front().get_value_type()).c_str()));
 250                         return false;
 251                 }
 252
 253                 value_desc_list.push_back(value_desc);
 254
 255                 return true;
 256         }
 257
 258         return Action::CanvasSpecific::set_param(name,param);
 259 }
 260
 261 bool
 262 Action::ValueDescLink::is_ready()const
 263 {
 264         if(poison)
 265                 return true;
 266         if(value_desc_list.size()<=1)
 267                 return false;
 268         return Action::CanvasSpecific::is_ready();
 269 }
 270
 271 void
 272 Action::ValueDescLink::prepare()
 273 {
 274         if(poison)
 275                 throw Error(status_message.c_str());
 276
 277         if(value_desc_list.empty())
 278                 throw Error(Error::TYPE_NOTREADY);
 279
 280         clear();
 281
 282         if(!link_value_node)
 283         {
 284                 status_message = _("No ValueNodes were available, so one was created.");
 285                 ValueDesc& value_desc(value_desc_list.back());
 286
 287                 link_value_node=ValueNode_Const::create(value_desc.get_value(time));
 288
 289                 Action::Handle action(Action::create("ValueDescConnect"));
 290
 291                 action->set_param("canvas",get_canvas());
 292                 action->set_param("canvas_interface",get_canvas_interface());
 293                 action->set_param("src",link_value_node);
 294                 action->set_param("dest",value_desc);
 295
 296                 assert(action->is_ready());
 297                 if(!action->is_ready())
 298                         throw Error(Error::TYPE_NOTREADY);
 299
 300                 add_action_front(action);
 301         }
 302
 303         // Check if the selected  link value node is already a scale -1.0 Linkable Value Node
 304         bool link_is_scaled(false);
 305         if(synfig::ValueNode_Scale::Handle::cast_dynamic(link_value_node))
 306                 {
 307                         synfig::ValueNode_Const::Handle scale_vn(
 308                                         synfig::ValueNode_Const::Handle::cast_dynamic(
 309                                                         synfig::ValueNode_Scale::Handle::cast_dynamic(link_value_node)->get_link(1)
 310                                                         )
 311                                                 );
 312                         if(scale_vn)
 313                                 if((*scale_vn)(synfig::Time(0))==synfig::ValueBase(Real(-1.0)))
 314                                         link_is_scaled=true;
 315                 }
 316
 317         std::list<ValueDesc>::iterator iter;
 318         // Gets the scalar value of the current value node
 319         Real current_scalar(0);
 320         if(value_desc_list.begin()->parent_is_linkable_value_node())
 321                 current_scalar=value_desc_list.begin()->get_scalar();
 322         bool found_inverse(false);
 323         // Check if we are dealing the case of linking differnt types of tangents
 324         for(iter=value_desc_list.begin();iter!=value_desc_list.end();++iter)
 325         {
 326                 ValueDesc& v_desc(*iter);
 327                 // If parent is linkable value node
 328                 if(v_desc.parent_is_linkable_value_node())
 329                 {
 330                         // if the link describe to any tangent (index 4 or 5), continue
 331                         if(v_desc.get_index() == 4 || v_desc.get_index() == 5)
 332                         {
 333                                 synfig::Real iter_scalar=v_desc.get_scalar();
 334                                 // Let's compare the sign  of scalar of the value node witht the current one
 335                                 // and remember if a change of sign is seen.
 336                                 if(iter_scalar*current_scalar < 0) // if they have different signs
 337                                 {
 338                                         found_inverse=true;
 339                                         current_scalar=iter_scalar;
 340                                 }
 341                         }
 342                         else // link doesn't describe a tangent
 343                         {
 344                                 found_inverse=false;
 345                                 break;
 346                         }
 347                 }
 348                 else // parent is not a linkable value node
 349                 {
 350                         found_inverse=false;
 351                         break;
 352                 }
 353         }
 354         // found_inverse =  true only if all they are tangents and some are inversed tangents
 355         //Noe let's loop throug all the value desc
 356         for(iter=value_desc_list.begin();iter!=value_desc_list.end();++iter)
 357         {
 358                 ValueDesc& value_desc(*iter);
 359
 360                 // only one of the selected items can be exported - that's the one we're linking to
 361                 // don't link it to itself
 362                 if (value_desc.is_exported())
 363                         continue;
 364                 // Don't link the selected to itself (maybe it is redundant with the previous check)
 365                 if(value_desc.get_value_node() == link_value_node)
 366                         continue;
 367                 // found_inverse xor link_opposite
 368                 // If     found_inverse and not link_opposite then scale by -1 first (smart link)
 369                 // If     found inverse and     link_opposite then do a direct link instead
 370                 // If not found_inverse and not link_opposite then do a direct link instead
 371                 // If not found_inverse and     link_opposite then scale by -1 first (smart link)
 372                 if((found_inverse && !link_opposite) || (!found_inverse && link_opposite))
 373                 {
 374                         //Check if the current value node has opposite scalar than the link
 375                         // value node to convert to scale -1.0 before connect.
 376                         // Check also if the link value node is NOT also a scale -1
 377                         // And check also if we are linking opposite
 378                         if( (value_desc.get_scalar()*link_scalar<0 || link_opposite) && (link_is_scaled==false))
 379                         {
 380                                 //Let's create a Scale Value Node
 381                                 synfig::ValueNode::Handle scale_value_node=synfig::LinkableValueNode::create("scale",iter->get_value(time));
 382                                 if(!scale_value_node)
 383                                         throw Error(Error::TYPE_BUG);
 384                                 scale_value_node->set_parent_canvas(get_canvas());
 385                                 //Let's connect the new Scale Value Node to the value node
 386                                 Action::Handle action1(Action::create("ValueDescConnect"));
 387                                 if(!action1)
 388                                         throw Error(Error::TYPE_CRITICAL);
 389                                 action1->set_param("canvas",get_canvas());
 390                                 action1->set_param("canvas_interface",get_canvas_interface());
 391                                 action1->set_param("dest",value_desc);
 392                                 action1->set_param("src",scale_value_node);
 393                                 assert(action1->is_ready());
 394                                 if(!action1->is_ready())
 395                                         throw Error(Error::TYPE_NOTREADY);
 396                                 add_action_front(action1);
 397
 398                                 //Let's Connect the link value node to the scale value node link subparam
 399                                 Action::Handle action2(Action::create("ValueNodeLinkConnect"));
 400                                 if(!action2)
 401                                         throw Error(Error::TYPE_CRITICAL);
 402
 403                                 action2->set_param("canvas",get_canvas());
 404                                 action2->set_param("canvas_interface",get_canvas_interface());
 405                                 action2->set_param("parent_value_node",scale_value_node);
 406                                 action2->set_param("index",0);
 407                                 action2->set_param("value_node",link_value_node);
 408                                 assert(action2->is_ready());
 409                                 if(!action2->is_ready())
 410                                         throw Error(Error::TYPE_NOTREADY);
 411                                 add_action_front(action2);
 412
 413                                 //Let's Set the scale to -1
 414                                 Action::Handle action3(Action::create("ValueNodeConstSet"));
 415                                 if(!action3)
 416                                         throw Error(Error::TYPE_CRITICAL);
 417
 418                                 action3->set_param("canvas",get_canvas());
 419                                 action3->set_param("canvas_interface",get_canvas_interface());
 420                                 action3->set_param("value_node",synfig::LinkableValueNode::Handle::cast_dynamic(scale_value_node)->get_link(1));
 421                                 action3->set_param("new_value",synfig::ValueBase(Real(-1.0)));
 422                                 assert(action3->is_ready());
 423                                 if(!action3->is_ready())
 424                                         throw Error(Error::TYPE_NOTREADY);
 425                                 add_action_front(action3);
 426                         }
 427                         else if((iter->get_scalar()*link_scalar<0 || link_opposite) && (link_is_scaled==true))
 428                         {
 429                                 //Let's connect the link value node -> link to the value node
 430                                 // There is not needed conversion to scale of the value node
 431                                 // because the link value node is already a scale -1
 432                                 Action::Handle action4(Action::create("ValueDescConnect"));
 433                                 if(!action4)
 434                                         throw Error(Error::TYPE_CRITICAL);
 435                                 action4->set_param("canvas",get_canvas());
 436                                 action4->set_param("canvas_interface",get_canvas_interface());
 437                                 action4->set_param("dest",value_desc);
 438                                 action4->set_param("src",synfig::ValueNode_Scale::Handle::cast_dynamic(link_value_node)->get_link(0));
 439                                 assert(action4->is_ready());
 440                                 if(!action4->is_ready())
 441                                         throw Error(Error::TYPE_NOTREADY);
 442                                 add_action_front(action4);
 443                         }
 444                         else
 445                         {
 446                                 //Let's connect the link value node to the value node
 447                                 Action::Handle action(Action::create("ValueDescConnect"));
 448
 449                                 action->set_param("canvas",get_canvas());
 450                                 action->set_param("canvas_interface",get_canvas_interface());
 451                                 action->set_param("src",link_value_node);
 452                                 action->set_param("dest",value_desc);
 453
 454                                 assert(action->is_ready());
 455                                 if(!action->is_ready())
 456                                         throw Error(Error::TYPE_NOTREADY);
 457
 458                                 add_action_front(action);
 459                         }
 460                 } // found inverse
 461                 else // Not found inverse so do a regualr link
 462                 {
 463                         //Let's connect the link value node to the value node
 464                         Action::Handle action(Action::create("ValueDescConnect"));
 465
 466                         action->set_param("canvas",get_canvas());
 467                         action->set_param("canvas_interface",get_canvas_interface());
 468                         action->set_param("src",link_value_node);
 469                         action->set_param("dest",value_desc);
 470
 471                         assert(action->is_ready());
 472                         if(!action->is_ready())
 473                                 throw Error(Error::TYPE_NOTREADY);
 474
 475                         add_action_front(action);
 476                 }
 477         }
 478
 479         synfig::info("http://synfig.org/Linking#Tier_%d : %s", status_level, status_message.c_str());
 480 }
 481
 482
 483 Action::ValueDescLinkOpposite::ValueDescLinkOpposite()
 484 {
 485 }
 486
 487 Action::ParamVocab
 488 Action::ValueDescLinkOpposite::get_param_vocab()
 489 {
 490         return Action::ValueDescLink::get_param_vocab();
 491 }
 492
 493 bool
 494 Action::ValueDescLinkOpposite::is_candidate(const ParamList &x)
 495 {
 496         // If action parameters are not Value Desc
 497         if(!candidate_check(get_param_vocab(),x))
 498                 return false;
 499
 500         int total_tangents=0;
 501         ParamList::const_iterator iter;
 502         //Search thru all the Param and pick up the value descriptions
 503         for(iter=x.begin(); iter!=x.end(); iter++)
 504         {
 505                 if(iter->first == "value_desc")
 506                 {
 507                         ValueDesc v_desc(iter->second.get_value_desc());
 508                         // if the value description parent is linkable value node, continue
 509                         if(!v_desc.parent_is_linkable_value_node())
 510                                 return false;
 511                         // if the link describe to any tangent (index 4 or 5), continue
 512                         if(v_desc.get_index() != 4 && v_desc.get_index() != 5)
 513                                 return false;
 514                         total_tangents++;
 515                 }
 516         }
 517         // If we found two tangents then continue
 518         if(total_tangents!=2)
 519                 return false;
 520         // We have reached exactly two tangents
 521         return true;
 522 }
 523
 524 bool
 525 Action::ValueDescLinkOpposite::set_param(const synfig::String& name, const Action::Param &param)
 526 {
 527         return Action::ValueDescLink::set_param(name,param);
 528 }
 529
 530 bool
 531 Action::ValueDescLinkOpposite::is_ready()const
 532 {
 533         return Action::ValueDescLink::is_ready();
 534 }
 535
 536 void
 537 Action::ValueDescLinkOpposite::prepare()
 538 {
 539         // prepare to do a opposite link and reuse the code from ValueDescLink
 540         link_opposite=true;
 541         ValueDescLink::prepare();
 542 }