synfig-studio/trunk/src/synfigapp/actions/layerremove.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file layerremove.cpp
   3 **      \brief Template File
   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 "layerremove.h"
  33 #include <synfigapp/canvasinterface.h>
  34
  35 #include <synfigapp/general.h>
  36
  37 #endif
  38
  39 using namespace std;
  40 using namespace etl;
  41 using namespace synfig;
  42 using namespace synfigapp;
  43 using namespace Action;
  44
  45 /* === M A C R O S ========================================================= */
  46
  47 ACTION_INIT_NO_GET_LOCAL_NAME(Action::LayerRemove);
  48 ACTION_SET_NAME(Action::LayerRemove,"layer_remove");
  49 ACTION_SET_LOCAL_NAME(Action::LayerRemove,N_("Remove Layer"));
  50 ACTION_SET_TASK(Action::LayerRemove,"remove");
  51 ACTION_SET_CATEGORY(Action::LayerRemove,Action::CATEGORY_LAYER);
  52 ACTION_SET_PRIORITY(Action::LayerRemove,0);
  53 ACTION_SET_VERSION(Action::LayerRemove,"0.0");
  54 ACTION_SET_CVS_ID(Action::LayerRemove,"$Id$");
  55
  56 /* === G L O B A L S ======================================================= */
  57
  58 /* === P R O C E D U R E S ================================================= */
  59
  60 /* === M E T H O D S ======================================================= */
  61
  62 Action::LayerRemove::LayerRemove()
  63 {
  64 }
  65
  66 synfig::String
  67 Action::LayerRemove::get_local_name()const
  68 {
  69         String ret;
  70
  71         if (layer_list.empty())
  72                 return _("Remove Layer");
  73
  74         ret = strprintf("%s '%s'",
  75                                         (layer_list.size() == 1
  76                                          ? _("Remove Layer")
  77                                          : _("Remove Layers")),
  78                                         (layer_list.begin()->first->get_description().empty()
  79                                          ? layer_list.begin()->first->get_local_name()
  80                                          : layer_list.begin()->first->get_description()).c_str());
  81
  82         for(std::list<std::pair<synfig::Layer::Handle,int> >::const_iterator iter=++layer_list.begin(); iter!=layer_list.end(); ++iter)
  83                 ret += strprintf(", '%s'", (iter->first->get_description().empty()
  84                                                                         ? iter->first->get_local_name()
  85                                                                         : iter->first->get_description()).c_str());
  86         return ret;
  87 }
  88
  89 Action::ParamVocab
  90 Action::LayerRemove::get_param_vocab()
  91 {
  92         ParamVocab ret(Action::CanvasSpecific::get_param_vocab());
  93
  94         ret.push_back(ParamDesc("layer",Param::TYPE_LAYER)
  95                 .set_local_name(_("Layer"))
  96                 .set_desc(_("Layer to be deleted"))
  97                 .set_supports_multiple()
  98         );
  99
 100         return ret;
 101 }
 102
 103 bool
 104 Action::LayerRemove::is_candidate(const ParamList &x)
 105 {
 106         return candidate_check(get_param_vocab(),x);
 107 }
 108
 109 bool
 110 Action::LayerRemove::set_param(const synfig::String& name, const Action::Param &param)
 111 {
 112         if(name=="layer" && param.get_type()==Param::TYPE_LAYER)
 113         {
 114                 std::pair<synfig::Layer::Handle,int> layer_pair;
 115                 layer_pair.first=param.get_layer();
 116                 layer_list.push_back(layer_pair);
 117
 118                 return true;
 119         }
 120
 121         return Action::CanvasSpecific::set_param(name,param);
 122 }
 123
 124 bool
 125 Action::LayerRemove::is_ready()const
 126 {
 127         if(layer_list.empty())
 128                 return false;
 129         return Action::CanvasSpecific::is_ready();
 130 }
 131
 132 void
 133 Action::LayerRemove::perform()
 134 {
 135         std::list<std::pair<synfig::Layer::Handle,int> >::iterator iter;
 136         for(iter=layer_list.begin();iter!=layer_list.end();++iter)
 137         {
 138                 Layer::Handle layer(iter->first);
 139 //              int& depth(iter->second);
 140                 Canvas::Handle subcanvas(layer->get_canvas());
 141
 142                 // Find the iterator for the layer
 143                 Canvas::iterator iter2=find(subcanvas->begin(),subcanvas->end(),layer);
 144
 145                 // If we couldn't find the layer in the canvas, then bail
 146                 if(*iter2!=layer)
 147                 {
 148                         /*!     \todo We should really undo all prior removals
 149                         **      before we go throwing shit around */
 150                         throw Error(_("This layer doesn't exist anymore."));
 151                 }
 152
 153                 // If the subcanvas isn't the same as the canvas,
 154                 // then it had better be an inline canvas. If not,
 155                 // bail
 156                 if(get_canvas()!=subcanvas && !subcanvas->is_inline())
 157                 {
 158                         /*!     \todo We should really undo all prior removals
 159                         **      before we go throwing shit around */
 160                         throw Error(_("This layer doesn't belong to this canvas anymore"));
 161                 }
 162
 163                 set_canvas(subcanvas);
 164
 165                 // Calculate the depth that the layer was at (For the undo)
 166                 iter->second=layer->get_depth();
 167
 168                 // Mark ourselves as dirty if necessary
 169                 set_dirty(layer->active());
 170
 171                 // Remove the layer from the canvas
 172                 subcanvas->erase(iter2);
 173
 174                 // Signal that a layer has been removed
 175                 if(get_canvas_interface())
 176                         get_canvas_interface()->signal_layer_removed()(layer);
 177         }
 178 }
 179
 180 void
 181 Action::LayerRemove::undo()
 182 {
 183         std::list<std::pair<synfig::Layer::Handle,int> >::reverse_iterator iter;
 184         for(iter=layer_list.rbegin();iter!=layer_list.rend();++iter)
 185         {
 186                 Layer::Handle layer(iter->first);
 187                 int& depth(iter->second);
 188
 189                 // Set the layer's canvas
 190                 layer->set_canvas(get_canvas());
 191
 192                 // Make sure that the depth is valid
 193                 if(get_canvas()->size()<depth)
 194                         depth=get_canvas()->size();
 195
 196                 // Mark ourselves as dirty if necessary
 197                 set_dirty(layer->active());
 198
 199                 // Insert the layer into the canvas at the desired depth
 200                 get_canvas()->insert(get_canvas()->begin()+depth,layer);
 201
 202                 // Signal that a layer has been inserted
 203                 if(get_canvas_interface())
 204                         get_canvas_interface()->signal_layer_inserted()(layer,depth);
 205         }
 206 }