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

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file valuedescsmartlink.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 **
  11 **      This package is free software; you can redistribute it and/or
  12 **      modify it under the terms of the GNU General Public License as
  13 **      published by the Free Software Foundation; either version 2 of
  14 **      the License, or (at your option) any later version.
  15 **
  16 **      This package is distributed in the hope that it will be useful,
  17 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  19 **      General Public License for more details.
  20 **      \endlegal
  21 */
  22 /* ========================================================================= */
  23
  24 /* === H E A D E R S ======================================================= */
  25
  26 #ifdef USING_PCH
  27 #       include "pch.h"
  28 #else
  29 #ifdef HAVE_CONFIG_H
  30 #       include <config.h>
  31 #endif
  32
  33 #include "valuedescsmartlink.h"
  34
  35 #include <synfigapp/canvasinterface.h>
  36 #include <synfig/valuenode_const.h>
  37 #include <synfig/valuenode_scale.h>
  38
  39 #include <synfigapp/general.h>
  40
  41 #endif
  42
  43 using namespace std;
  44 using namespace etl;
  45 using namespace synfig;
  46 using namespace synfigapp;
  47 using namespace Action;
  48
  49 /* === M A C R O S ========================================================= */
  50
  51 ACTION_INIT(Action::ValueDescSmartLink);
  52 ACTION_SET_NAME(Action::ValueDescSmartLink,"ValueDescSmartLink");
  53 ACTION_SET_LOCAL_NAME(Action::ValueDescSmartLink,N_("Smart Link"));
  54 ACTION_SET_TASK(Action::ValueDescSmartLink,"connect");
  55 ACTION_SET_CATEGORY(Action::ValueDescSmartLink,Action::CATEGORY_VALUEDESC);
  56 ACTION_SET_PRIORITY(Action::ValueDescSmartLink,0);
  57 ACTION_SET_VERSION(Action::ValueDescSmartLink,"0.0");
  58 ACTION_SET_CVS_ID(Action::ValueDescSmartLink,"$Id$");
  59
  60 /* === G L O B A L S ======================================================= */
  61
  62 /* === P R O C E D U R E S ================================================= */
  63
  64 /* === M E T H O D S ======================================================= */
  65
  66 Action::ValueDescSmartLink::ValueDescSmartLink(): poison(false), status_level(0)
  67 {
  68 }
  69
  70 Action::ParamVocab
  71 Action::ValueDescSmartLink::get_param_vocab()
  72 {
  73         ParamVocab ret(Action::CanvasSpecific::get_param_vocab());
  74
  75         ret.push_back(ParamDesc("value_desc",Param::TYPE_VALUEDESC)
  76                 .set_local_name(_("ValueDesc to smart link"))
  77                 .set_requires_multiple()
  78         );
  79
  80         return ret;
  81 }
  82
  83 bool
  84 Action::ValueDescSmartLink::is_candidate(const ParamList &x)
  85 {
  86         // If action parameters are not Value Desc
  87         if(!candidate_check(get_param_vocab(),x))
  88                 return false;
  89         // If the size of the List of Param is not two
  90
  91         // If both value desc aren't Linkable Value Nodes children
  92         ParamList::const_iterator iter;
  93         int counter=0;
  94         Param params[2];
  95         for(iter=x.begin(); iter!=x.end(); iter++)
  96         {
  97                 if(iter->first == "value_desc")
  98                 {
  99                         params[counter]=iter->second;
 100                         counter++;
 101                 }
 102                 if (counter>2)
 103                         return false;
 104         }
 105         Param pfront(params[0]);
 106         Param pback(params[1]);
 107         if(!pfront.get_value_desc().parent_is_linkable_value_node() ||
 108                 !pback.get_value_desc().parent_is_linkable_value_node())
 109                 return false;
 110         // If both don't have opposite scalars.
 111         if(!((pback.get_value_desc().get_scalar()< 0 && pfront.get_value_desc().get_scalar()> 0)
 112                         ||
 113                         (pback.get_value_desc().get_scalar()> 0 && pfront.get_value_desc().get_scalar()< 0))
 114                 )
 115                 return false;
 116
 117         //We have reached two opposite tangents
 118         return true;
 119 }
 120
 121 bool
 122 Action::ValueDescSmartLink::set_param(const synfig::String& name, const Action::Param &param)
 123 {
 124         if(name=="time" && param.get_type()==Param::TYPE_TIME)
 125         {
 126                 time=param.get_time();
 127                 return true;
 128         }
 129
 130         // don't bother looking for the best value to use if there's already been an error
 131         if (poison==true) return false;
 132
 133         if(name=="value_desc" && param.get_type()==Param::TYPE_VALUEDESC)
 134         {
 135                 ValueDesc value_desc(param.get_value_desc());
 136
 137                 if(value_desc.is_value_node() && value_desc.get_value_node()->is_exported())
 138                 {
 139                         if(link_value_node==value_desc.get_value_node())
 140                                 return true;
 141
 142                         if(link_value_node && link_value_node->is_exported())
 143                         {
 144                                 poison=true;
 145                                 status_message = (_("Cannot link two different exported values ('") +
 146                                                                   value_desc.get_value_node()->get_id() + _("' and '") +
 147                                                                   link_value_node->get_id()) + _("')");
 148                                 return false;
 149                         }
 150
 151                         link_value_node=value_desc.get_value_node();
 152                         status_message = _("Used exported ValueNode ('") + link_value_node->get_id() + _("').");
 153                 }
 154                 else if(value_desc.is_value_node())
 155                 {
 156                         if(!link_value_node)
 157                         {
 158                                 status_level = 1;
 159                                 status_message = _("Using the only available ValueNode.");
 160                                 link_value_node=value_desc.get_value_node();
 161                         }
 162                         else if(link_value_node->is_exported())
 163                         {
 164                                 // we've already seen an exported value, so use that rather than the current value
 165                         }
 166                         // Use the one that is referenced more
 167                         else if(link_value_node->rcount()!=value_desc.get_value_node()->rcount())
 168                         {
 169                                 if(link_value_node->rcount()<value_desc.get_value_node()->rcount())
 170                                 {
 171                                         status_level = 2;
 172                                         status_message = _("Using the most referenced ValueNode.");
 173                                         link_value_node=value_desc.get_value_node();
 174                                 }
 175                                 else if (status_level <= 2)
 176                                 {
 177                                         status_level = 2;
 178                                         status_message = _("Using the most referenced ValueNode.");
 179                                 }
 180                         }
 181                         // If the current link value node is a constant and
 182                         // this one isn't, then give preference to the exotic
 183                         else if(ValueNode_Const::Handle::cast_dynamic(link_value_node) && !ValueNode_Const::Handle::cast_dynamic(value_desc.get_value_node()))
 184                         {
 185                                 status_level = 3;
 186                                 status_message = _("There's a tie for most referenced; using the animated ValueNode.");
 187                                 link_value_node=value_desc.get_value_node();
 188                         }
 189                         else if(ValueNode_Const::Handle::cast_dynamic(value_desc.get_value_node()) && !ValueNode_Const::Handle::cast_dynamic(link_value_node))
 190                         {
 191                                 if (status_level <= 3)
 192                                 {
 193                                         status_level = 3;
 194                                         status_message = _("There's a tie for most referenced; using the animated ValueNode.");
 195                                 }
 196                         }
 197                         // If both are animated, and this one has more waypoints, then use the one with more waypoints
 198                         else if(ValueNode_Animated::Handle::cast_dynamic(link_value_node) &&
 199                                         ValueNode_Animated::Handle::cast_dynamic(value_desc.get_value_node()) &&
 200                                         ValueNode_Animated::Handle::cast_dynamic(link_value_node)->waypoint_list().size() !=
 201                                         ValueNode_Animated::Handle::cast_dynamic(value_desc.get_value_node())->waypoint_list().size())
 202                         {
 203                                 if (ValueNode_Animated::Handle::cast_dynamic(link_value_node)->waypoint_list().size() <
 204                                         ValueNode_Animated::Handle::cast_dynamic(value_desc.get_value_node())->waypoint_list().size())
 205                                 {
 206                                         status_level = 4;
 207                                         status_message = _("There's a tie for most referenced, and both are animated; using the one with the most waypoints.");
 208                                         link_value_node=value_desc.get_value_node();
 209                                 }
 210                                 else if (status_level <= 4)
 211                                 {
 212                                         status_level = 4;
 213                                         status_message = _("There's a tie for most referenced, and both are animated; using the one with the most waypoints.");
 214                                 }
 215                         }
 216                         // Use the one that was least recently changed
 217                         else if(link_value_node->get_time_last_changed()!=value_desc.get_value_node()->get_time_last_changed())
 218                         {
 219                                 if(link_value_node->get_time_last_changed()>value_desc.get_value_node()->get_time_last_changed())
 220                                 {
 221                                         status_level = 5;
 222                                         status_message = _("Everything is tied; using the least recently modified value.");
 223                                         link_value_node=value_desc.get_value_node();
 224                                 }
 225                                 else if (status_level <= 5)
 226                                 {
 227                                         status_level = 5;
 228                                         status_message = _("Everything is tied; using the least recently modified value.");
 229                                 }
 230                         }
 231                         else
 232                         {
 233                                 status_level = 6;
 234                                 status_message = _("Absolutely everything is tied.");
 235                         }
 236                 }
 237
 238                 if(value_desc_list.size() && value_desc.get_value_type()!=value_desc_list.front().get_value_type())
 239                 {
 240                         // Everything must be of the same type
 241                         poison=true;
 242                         status_message = (strprintf(_("Cannot link two values of different types ('%s' and '%s')"),
 243                                                                                 ValueBase::type_local_name(value_desc.get_value_type()).c_str(),
 244                                                                                 ValueBase::type_local_name(value_desc_list.front().get_value_type()).c_str()));
 245                         return false;
 246                 }
 247
 248                 value_desc_list.push_back(value_desc);
 249
 250                 return true;
 251         }
 252
 253         return Action::CanvasSpecific::set_param(name,param);
 254 }
 255
 256 bool
 257 Action::ValueDescSmartLink::is_ready()const
 258 {
 259         if(poison)
 260                 return true;
 261         if(value_desc_list.size()!=2)
 262                 return false;
 263         return Action::CanvasSpecific::is_ready();
 264 }
 265
 266 void
 267 Action::ValueDescSmartLink::prepare()
 268 {
 269         if(poison)
 270                 throw Error(status_message.c_str());
 271
 272         if(value_desc_list.empty())
 273                 throw Error(Error::TYPE_NOTREADY);
 274
 275         clear();
 276
 277         if(value_desc_list.size()!=2)
 278                 throw Error(Error::TYPE_BUG);
 279
 280         ValueDesc& value_desc_t1(value_desc_list.front());
 281         ValueDesc& value_desc_t2(value_desc_list.back());
 282         t1 = value_desc_t1.get_value_node();
 283         t2 = value_desc_t2.get_value_node();
 284
 285         if(!link_value_node)
 286         {
 287                 // we should have a value node selected because is candidate
 288                 // should have checked it before
 289                 throw Error(Error::TYPE_BUG);
 290         }
 291
 292         //Study the particular case of two tangents of a bline being linked.
 293         ValueDesc& toconvert(value_desc_t2);
 294                 if(t1==link_value_node)
 295                 {
 296                         // Convert t2
 297                         synfig::info("converting t2");
 298                         toconvert=value_desc_t2;
 299                 }
 300                 else if(t2==link_value_node)
 301                 {
 302                         //Convert t1
 303                         synfig::info("converting t1");
 304                         toconvert=value_desc_t1;
 305                 }
 306                 else { synfig::info("error"); }
 307
 308                 Action::Handle action(Action::create("ValueDescConvert"));
 309                 action->set_param("canvas",get_canvas());
 310                 action->set_param("canvas_interface",get_canvas_interface());
 311                 action->set_param("time",time);
 312                 action->set_param("type","scale");
 313                 action->set_param("value_desc",toconvert);
 314                 assert(action->is_ready());
 315                 if(!action->is_ready())
 316                         throw Error(Error::TYPE_NOTREADY);
 317                 add_action_front(action);
 318
 319         synfig::info("http://synfig.org/Linking#Tier_%d : %s", status_level, status_message.c_str());
 320 }